Chuck

Abstract

The invention relates to the technical field of chucks, in particular to a chuck which comprises a spindle flange, a rear cover is fixedly mounted on the spindle flange and fixedly connected with a shell, and a clamping mechanism which can move rightwards and turn over towards the middle to close to fix a workpiece is mounted in the shell. The ejector pin mechanism can move rightwards, is connected with the end of a workpiece and prevents the workpiece from sliding, the clamping mechanism comprises three sets of supports and a shaft rod, the supports are evenly fixed to the inner wall of the shell, guide holes are formed in the side walls of the supports, the right ends of the guide holes extend outwards to form turnover positioning holes, and the shaft rod is connected with the guide holes. The guide hole of the support is connected with the shaft pin in a matched mode and has a guide effect on the shaft rod, after the shaft pin continues to move rightwards, the shaft pin enters the overturning positioning hole, the left end of the shaft rod has an outward extending effect, the right end of the shaft rod is overturned towards the center line position of the shell through the ball sleeve serving as a fulcrum, and therefore the clamping jaw clamps a workpiece, and the workpiece machining precision is improved.

Description

Technical Field

[0001] This invention relates to the field of chuck technology, specifically a chuck. Background Technology

[0002] A chuck is a mechanical device used on machine tools to clamp workpieces. It's a machine tool accessory that uses the radial movement of movable jaws evenly distributed on the chuck body to clamp and position the workpiece. A chuck generally consists of three parts: the chuck body, the movable jaws, and the jaw drive mechanism. The chuck body diameter ranges from a minimum of 65 mm to a maximum of 1500 mm, with a central through-hole to allow the workpiece or bar stock to pass through; the back has a cylindrical or short conical structure, directly or via a flange, connecting to the end of the machine tool spindle. Chucks are commonly used on lathes, external cylindrical grinding machines, and internal cylindrical grinding machines, and can also be used with various indexing devices on milling machines and drilling machines.

[0003] The current chuck is a triangular chuck. When machining long shaft workpieces, it is necessary to clamp them twice. During the second clamping process, the workpiece will shift, affecting the workpiece accuracy. Therefore, a new type of chuck was invented. Summary of the Invention

[0004] The purpose of this invention is to provide a chuck to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A chuck includes a spindle flange, a rear cover fixedly mounted on the spindle flange, the rear cover being fixedly connected to a housing, and a clamping mechanism that can move to the right and flip towards the center to fix a workpiece inside the housing.

[0007] It also includes a push pin mechanism that can move to the right to connect with the end of the workpiece and prevent the workpiece from sliding.

[0008] In a preferred embodiment of the present invention, the clamping mechanism includes a bracket and a shaft. The bracket is provided in three sets and is evenly fixed on the inner wall of the outer shell. The side wall of the bracket is provided with a guide hole. The right end of the guide hole extends outward with a flip positioning hole. The bracket is provided with a notch in the middle. The inner wall of the notch is provided with a shaft.

[0009] In a preferred embodiment of the present invention, the left end of the shaft is rotatably connected to the connecting plate via a shaft pin. The end of the connecting plate away from the shaft pin is rotatably connected to the central connecting rod via a rotating pin. A spring support plate is fixedly installed on the left end of the central connecting rod. A spring is installed on the spring support plate and corresponds to the left end of the connecting plate. Both ends of the shaft pin extend into the inner wall of the guide hole.

[0010] In a preferred embodiment of the present invention, a pull rod is fixedly connected to the left end of the central connecting rod, and the pull rod extends into the lathe drive spindle and is connected to a hydraulic cylinder inside the spindle.

[0011] In a preferred embodiment of the present invention, a ball hole is provided at the right end of the outer shell, and three sets of ball holes are provided. A ball sleeve is installed inside the ball hole. The two ends of the outer wall of the ball sleeve are provided with axle pins, which are rotatably connected to the inner wall of the ball hole. The rotation direction is the center direction of the outer shell.

[0012] In a preferred embodiment of the present invention, the inner wall of the ball sleeve is connected to the shaft, and the shaft extends out of the outer shell and is fixedly connected to the claw.

[0013] In a preferred embodiment of the present invention, a pin seat is fixedly installed at the middle of the right end of the outer shell, a pin is fixedly installed at the right end of the pin seat, and a tip is fixedly provided at the middle of the right end of the pin.

[0014] In a preferred embodiment of the present invention, the ejector mechanism includes an ejector rod that passes through a pull rod, a central connecting rod, and an ejector seat sequentially to the right and contacts a circular seat. A locking pin is fixedly installed at the right end of the circular seat, and the locking pin is configured in three groups, with the locking pin passing through the ejector pin.

[0015] In a preferred embodiment of the present invention, the ejector pin has a through hole, the inner wall of the through hole is provided with a retaining pin, a spring is installed at the left end of the ejector pin, the end of the spring away from the ejector pin is connected to a round seat, and the round seat is disposed in a groove opened at the right end of the ejector pin seat.

[0016] In a preferred embodiment of the present invention, the left end of the push rod extends into the lathe drive spindle and is connected to the second hydraulic cylinder inside the spindle.

[0017] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

[0018] The bracket is provided in three sets and is evenly fixed to the inner wall of the outer shell. The side wall of the bracket has a guide hole, and the right end of the guide hole extends outward to a flip positioning hole. The bracket has a notch in the middle, and the inner wall of the notch is provided with a shaft. The guide hole of the bracket is connected to the shaft pin and guides the shaft. When the shaft pin continues to move to the right, it enters the flip positioning hole, so that the left end of the shaft has an outward extension. Then the right end of the shaft flips towards the center line of the outer shell through the ball sleeve as a fulcrum, so that the chuck clamps the workpiece and improves the workpiece machining accuracy.

[0019] The ejector mechanism includes an ejector rod, which passes through a pull rod, a central connecting rod, and an ejector seat to the right and contacts a circular seat. A chuck is fixedly installed at the right end of the circular seat. There are three sets of chucks. The chucks pass through the ejector pin, and the circular seat has a fixing function for the chucks. After the chuck extends out of the ejector pin, the cutting edge of the chuck end contacts the edge of the workpiece to prevent the workpiece from sliding during rotation. Attached Figure Description

[0020] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0021] Figure 1 A three-dimensional image in a chuck;

[0022] Figure 2 A right view of a chuck;

[0023] Figure 3 A front view of a chuck;

[0024] Figure 4 A left view of a chuck;

[0025] Figure 5 A diagram illustrating the splitting of a chuck. Figure 1 ;

[0026] Figure 6 A diagram illustrating the splitting of a chuck. Figure 2 ;

[0027] Figure 7 This is a cross-sectional view of a chuck.

[0028] In the diagram: 1. Main spindle flange; 2. Rear cover; 3. Top rod; 4. Tie rod; 5. Bracket; 51. Guide hole; 52. Flip positioning hole; 53. Notch.

[0029] 6. Central connecting rod, 7. Rotating pin, 8. Connecting plate, 9. Spring support plate, 10. Shaft pin, 11. Shaft, 12. Housing, 13. Ball hole, 14. Ball sleeve, 15. Claw, 16. Ejector seat, 17. Round seat, 18. Claw pin, 19. Ejector pin, 20. Spring, 21. Center, 22. Through hole. Detailed Implementation

[0030] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0031] Please refer to Figure 1-7A chuck includes a spindle flange 1, a rear cover 2 fixedly mounted on the spindle flange 1, the rear cover 2 being fixedly connected to a housing 12, and a clamping mechanism that can move to the right and flip towards the center to fix the workpiece inside the housing 12.

[0032] The spindle flange 1 is fixedly installed on the spindle of the lathe. The function of the spindle flange 1 is to fix the rear cover 2 and the outer shell 12 on the lathe. The outer shell 12 is fixedly connected to the rear cover 2 and has a protective function for the clamping mechanism inside the outer shell 12.

[0033] It also includes a push pin mechanism that can move to the right to connect with the end of the workpiece and prevent the workpiece from sliding.

[0034] The clamping mechanism includes a bracket 5 and a shaft 11. The bracket 5 is provided in three sets and is evenly fixed to the inner wall of the outer shell 12. The side wall of the bracket 5 is provided with a guide hole 51. The right end of the guide hole 51 extends outward to a flip positioning hole 52. The bracket 5 is provided with a notch 53 in the middle. The inner wall of the notch 53 is provided with a shaft 11. Specifically, the guide hole 51 of the bracket 5 is connected to the shaft pin 10 and has a guiding function for the shaft 11. When the shaft pin 10 continues to move to the right, it enters the flip positioning hole 52, so that the left end of the shaft 11 has an outward extension function. Then, the right end of the shaft 11 flips towards the center line position of the outer shell 12 through the ball sleeve 14 as a fulcrum.

[0035] The left end of the shaft 11 is rotatably connected to the connecting plate 8 via the shaft pin 10. The end of the connecting plate 8 away from the shaft pin 10 is rotatably connected to the central connecting rod 6 via the rotating pin 7. The left end of the central connecting rod 6 is fixedly installed with a spring support plate 9. A spring is installed on the spring support plate 9 and corresponds to the left end of the connecting plate 8. Both ends of the shaft pin 10 extend into the inner wall of the guide hole 51. Specifically, the function of the connecting plate 8 is to flip the shaft 11. The spring support plate 9 is used to support the connecting plate 8 to prevent the connecting plate 8 from moving to the left, and at the same time, it has a shock absorption function for the connecting plate 8.

[0036] The left end of the central connecting rod 6 is fixedly connected to the pull rod 4. The pull rod 4 extends into the lathe drive spindle and is connected to the hydraulic cylinder 1 (not marked in the figure) inside the spindle. Specifically, the pull rod 4 moves left and right through the hydraulic cylinder 1, thereby moving the central connecting rod 6 left and right, and thus moving the shaft 11 left and right.

[0037] The outer casing 12 has a ball hole 13 at its right end. There are three sets of ball holes 13. A ball sleeve 14 is installed inside the ball hole 13. The two ends of the outer wall of the ball sleeve 14 are provided with axle pins (not marked in the figure) and are rotatably connected to the inner wall of the ball hole 13. The rotation direction is towards the center of the outer casing 12. The inner wall of the ball sleeve 14 is connected to the shaft 11. After the shaft 11 extends out of the outer casing 12, it is fixedly connected to the jaw 15. Specifically, the ball sleeve 14 acts as a fulcrum for the shaft 11 and has the function of rotating the shaft 11 towards the center line of the outer casing 12. At the same time, the ball sleeve 14 also has a guiding function for the shaft 11. The jaw 15 has a clamping function for the workpiece. There is no need to perform secondary clamping of the workpiece, which improves the machining accuracy of the workpiece.

[0038] A pin seat 16 is fixedly installed at the middle of the right end of the outer shell 12, and a pin 19 is fixedly installed at the right end of the pin seat 16. A tip 21 is fixedly provided at the middle of the right end of the pin 19. Specifically, the pin seat 16 has the function of installing the pin 19, and the tip 21 of the pin 19 has the function of supporting the end of the workpiece, which can maintain the workpiece rotating along the center line.

[0039] The ejector mechanism includes an ejector rod 3, which passes through a pull rod 4, a central connecting rod 6, and an ejector seat 16 to the right, and contacts a circular seat 17. A retaining pin 18 is fixedly installed at the right end of the circular seat 17. The retaining pins 18 are arranged in three groups and pass through the ejector pin 19. Specifically, the circular seat 17 has a fixing function for the retaining pins 18. After the retaining pin 18 extends out of the ejector pin 19, the cutting surface of the end of the retaining pin 18 contacts the edge of the workpiece to prevent the workpiece from sliding during rotation.

[0040] The ejector pin 19 has a through hole 22, and a retaining pin 18 is provided on the inner wall of the through hole 22. A spring 20 is installed on the left end of the ejector pin 19. The end of the spring 20 away from the ejector pin 19 is connected to the round seat 17. The round seat 17 is set in the groove opened on the right end of the ejector pin seat 16. Specifically, the spring 20 has an elastic force on the round seat 17. When the ejector rod 3 retracts, the round seat 17 is restored to its original position by the action of the spring 20.

[0041] The left end of the push rod 3 extends into the lathe drive spindle and connects with the hydraulic cylinder 2 (not marked in the figure) inside the spindle. The hydraulic cylinder 2 drives the push rod 3, enabling the push rod 3 to move left and right.

[0042] The working principle of this invention is as follows: The workpiece is mounted on a lathe, the spindle is moved, and the tip 21 of the ejector pin 19 is pressed against the end of the workpiece. Then, the second hydraulic cylinder is activated, which moves the ejector rod 3 to the right, moving the chuck pin 18 of the round seat 17 out of the ejector pin 19 and clamping the edge of the workpiece end to prevent the workpiece from rolling during rotation. After the end is processed, the first hydraulic cylinder is activated, which moves the pull rod 4 to the right. The pull rod 4 drives the central connecting rod 6 to the right, which in turn drives the shaft 11 to the right. The shaft 11 is connected to the guide hole 51 through the shaft pin 10 for guidance. When the shaft pin 10 continues to move to the right, it enters the flip positioning hole 52, so that the left end of the shaft 11 has an outward extension function. Then, the right end of the shaft 11 flips towards the center line position of the outer shell 12 through the ball sleeve 14 as a fulcrum, thereby causing the chuck 15 to clamp the workpiece.

[0043] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A chuck, comprising a spindle flange (1), characterized in that: A rear cover (2) is fixedly installed on the main spindle flange (1). The rear cover (2) is fixedly connected to the outer shell (12). A clamping mechanism that can move to the right and flip towards the center to fix the workpiece is installed inside the outer shell (12). It also includes a push pin mechanism that can move to the right to connect with the end of the workpiece and prevent the workpiece from sliding.

2. A chuck according to claim 1, characterized in that, The clamping mechanism includes a bracket (5) and a shaft (11). The bracket (5) is provided in three sets and is evenly fixed on the inner wall of the outer shell (12). The side wall of the bracket (5) is provided with a guide hole (51). The right end of the guide hole (51) extends outward with a flip positioning hole (52). The bracket (5) is provided with a notch (53) in the middle. The inner wall of the notch (53) is provided with a shaft (11).

3. A chuck according to claim 2, characterized in that, The left end of the shaft (11) is rotatably connected to the connecting plate (8) via the shaft pin (10). The connecting plate (8) is located away from the shaft pin (10) and is rotatably connected to the central connecting rod (6) via the rotating pin (7). The left end of the central connecting rod (6) is fixedly installed with a spring support plate (9). A spring is installed on the spring support plate (9) and corresponds to the left end of the connecting plate (8). Both ends of the shaft pin (10) extend into the inner wall of the guide hole (51).

4. A chuck according to claim 3, characterized in that, The left end of the central connecting rod (6) is fixedly connected to the pull rod (4), which extends into the lathe drive spindle and is connected to the hydraulic cylinder inside the spindle.

5. A chuck according to claim 2, characterized in that, The outer shell (12) has a ball hole (13) at the right end. There are three sets of ball holes (13). A ball sleeve (14) is installed inside the ball hole (13). The ball sleeve (14) has a shaft pin at both ends of the outer wall in the middle, which is rotatably connected to the inner wall of the ball hole (13). Its rotation direction is the center direction of the outer shell (12).

6. A chuck according to claim 5, characterized in that, The inner wall of the ball sleeve (14) is connected to the shaft (11), and the shaft (11) extends out of the outer shell (12) and is fixedly connected to the claw (15).

7. A chuck according to claim 1, characterized in that, A pin seat (16) is fixedly installed at the middle of the right end of the outer shell (12), and a pin (19) is fixedly installed at the right end of the pin seat (16). A tip (21) is fixedly provided at the middle of the right end of the pin (19).

8. A chuck according to claim 1, characterized in that, The ejector mechanism includes an ejector rod (3), which passes through a pull rod (4), a central connecting rod (6) and an ejector seat (16) to the right and contacts a round seat (17). A locking pin (18) is fixedly installed on the right end of the round seat (17). The locking pin (18) is set in three groups and passes through the ejector pin (19).

9. A chuck according to claim 8, characterized in that, The ejector pin (19) has a through hole (22), and the inner wall of the through hole (22) is provided with a retaining pin (18). A spring (20) is installed on the left end of the ejector pin (19). The end of the spring (20) away from the ejector pin (19) is connected to a round seat (17). The round seat (17) is located in a groove opened at the right end of the ejector pin seat (16).

10. A chuck according to claim 8, characterized in that, The left end of the push rod (3) extends into the lathe drive spindle and connects with the hydraulic cylinder 2 inside the spindle.

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