Rotatable clamping mechanism for machine tool workpiece polishing

Abstract

The utility model discloses a rotatable clamping mechanism for grinding a machine tool workpiece, which belongs to the field of clamping mechanisms and comprises a bottom frame, a rotating shaft is arranged on the bottom frame, a hexagonal rod is connected onto the rotating shaft, a connecting shaft is fixed at the end of the hexagonal rod, a driving clamping plate is arranged at the tail end of the connecting shaft, and a fixing sleeve is arranged on the bottom frame. Through the arranged auxiliary supporting structure, a workpiece can be supported and placed through an elastic supporting assembly, the workpiece can be conveniently moved to a proper height, it is ensured that the workpiece can be rapidly and accurately clamped, a connecting rod, a spring and a universal ball are arranged in the elastic supporting assembly, when the workpiece is short, a movable base can move along the connecting rod for avoiding in the clamping process, and the workpiece can be conveniently clamped. The clamping and fixing of the workpiece are not affected, the elastic supporting assembly can be rapidly separated from the clamping structure through the universal ball, the adjusting mechanism is adopted, the positions of the two movable frames are adjusted through the two-way lead screw, it is guaranteed that the workpiece is arranged in the middle after being clamped and fixed, and the grinding precision is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of clamping mechanisms, and in particular to a rotatable clamping mechanism for grinding machine tool workpieces. Background Technology

[0002] Machine tool workpieces generally require grinding to ensure a smooth surface. During grinding, the workpiece needs to be clamped to prevent movement before the grinding operation. Clamping typically uses a clamping mechanism; the workpiece is placed on the mechanism and secured with clamps before grinding. To improve grinding efficiency, a rotatable clamping mechanism is generally used to hold and fix the workpiece, allowing for circumferential grinding and increasing flexibility and adaptability.

[0003] Existing patent number CN213319609U discloses "A Rotatable Clamping Device for Grinding Machine Tool Workpieces." This patent uses a drive device to effectively clamp the workpiece and a rotating device to rotate it, improving the grinding effect. However, in this patent, only the position of the movable disc is adjusted, while the position of the fixed disc remains stationary. The workpiece cannot be centered after clamping, resulting in different positional offsets for workpieces of varying lengths, affecting grinding accuracy and convenience. Furthermore, the patent lacks an auxiliary support structure, making it difficult to keep the workpiece precisely centered between the movable and fixed discs, resulting in extremely inconvenient clamping. Utility Model Content

[0004] The main purpose of this utility model is to provide a rotatable clamping mechanism for grinding machine tool workpieces, which can effectively solve the problems in the background art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A rotatable clamping mechanism for grinding machine tool workpieces includes a base frame, a rotating shaft on the base frame, a hexagonal rod connected to the rotating shaft, a connecting shaft fixed to the end of the hexagonal rod, and an active clamping plate at the end of the connecting shaft. A fixed sleeve is provided on the base frame, and a movable rod is provided in the fixed sleeve. A follower clamping plate is provided at the end of the movable rod. An auxiliary support structure is provided on the base frame, and an adjustment mechanism connected to the connecting shaft and the movable rod is installed on the base frame. A protective structure is provided on the base frame.

[0007] Preferably, the auxiliary support structure includes a guide column, a guide sleeve, a lifting servo motor, a lifting screw, a lifting sleeve, and an elastic support assembly. The guide column and the guide sleeve are movably sleeved together, and the guide column is fixed on the base frame. The lifting servo motor is fixed on the base frame and connected to the lifting screw. The elastic support assembly is fixedly connected to the guide sleeve. The lifting sleeve is installed at the lower end of the elastic support assembly and is threadedly connected to the lifting screw.

[0008] Preferably, the elastic support assembly includes a lifting seat, a movable seat, a countersunk hole, a connecting rod, and a limiting block. The countersunk hole is formed on the movable seat. The connecting rod and the limiting block are fixedly connected and located in the countersunk hole on the movable seat. The end of the connecting rod is threaded to the lifting seat. The two movable seats are symmetrically arranged relative to the lifting seat.

[0009] Preferably, the elastic support assembly further includes a spring and a swivel ball. The spring is sleeved on the connecting rod, and the end of the spring abuts against the lifting seat and the movable seat. The limiting block is provided with a hexagonal groove, and the outer side of the movable seat is provided with a circular groove. The swivel ball is fixed in the circular groove on the movable seat.

[0010] Preferably, the adjustment mechanism includes a round rod, a movable frame, an adjustment servo motor, and a bidirectional lead screw. The round rod is fixed on the base frame, and the two movable frames are movably connected to the round rod. The adjustment servo motor and the bidirectional lead screw are mounted on the base frame and connected to each other. The bidirectional lead screw passes through the movable frame and is threadedly connected to the movable frame. Movable slots are provided on the two movable frames.

[0011] Preferably, the protective structure includes a protective cover, a connecting plate, and mounting screws. The protective cover is fixedly connected to the connecting plate, the mounting screws are disposed on the connecting plate, and the protective cover and the connecting plate are mounted on the base frame by the mounting screws.

[0012] Preferably, a drive motor is fixed on the base frame, and the drive motor is connected to the rotating shaft.

[0013] Preferably, the adjusting mechanism is provided with a bearing, and the connecting shaft and the movable rod are connected to the adjusting mechanism through the bearing.

[0014] Compared with the prior art, this utility model has the following beneficial effects: The rotatable clamping mechanism for workpiece grinding of this machine tool, through the set auxiliary support structure, adopts a lifting servo motor, lifting screw and other structures to adjust the height of the elastic support component when clamping the workpiece. The elastic support component can be used to support and place the workpiece, making it easy to move the workpiece to a suitable height and ensuring that the workpiece can be clamped quickly and accurately. The elastic support component is equipped with a connecting rod, spring and universal ball. When the workpiece is short, the movable seat can move along the connecting rod to make room during the clamping process without affecting the clamping and fixing of the workpiece. The universal ball allows the elastic support component to quickly disengage from the clamping structure. The adjustment mechanism uses a two-way screw to adjust the position of the two movable frames, so that the connecting shaft with the active clamping plate and the movable rod with the follower clamping plate can move synchronously to ensure that the workpiece is centered after clamping and fixing, ensuring grinding accuracy. The protective structure plays a dustproof role, preventing grinding dust from falling on the two-way screw and ensuring the cleanliness of the two-way screw. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the auxiliary support structure of this utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the elastic support component of this utility model;

[0018] Figure 4 This is a schematic diagram of the structure of the adjustment mechanism of this utility model;

[0019] Figure 5 This is a schematic diagram of the dustproof structure of this utility model.

[0020] In the diagram: 1. Base frame; 2. Rotating shaft; 3. Hexagonal rod; 4. Connecting shaft; 5. Active clamping plate; 6. Fixed sleeve; 7. Movable rod; 8. Follower clamping plate; 9. Auxiliary support structure; 901. Guide column; 902. Guide sleeve; 903. Lifting servo motor; 904. Lifting screw; 905. Elastic support assembly; 9051. Lifting seat; 9052. Movable seat; 9053. Countersunk hole; 9054. Connecting rod; 9055. Limiting block; 9056. Spring; 9057. Universal ball; 906. Lifting sleeve; 10. Adjustment mechanism; 1001. Round rod; 1002. Movable frame; 1003. Adjustment servo motor; 1004. Bidirectional screw; 11. Protective structure; 1101. Protective cover; 1102. Connecting plate; 1103. Mounting screw; 12. Drive motor. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0022] like Figures 1-5 As shown, a rotatable clamping mechanism for grinding machine tool workpieces includes a base frame 1, a rotating shaft 2 mounted on the base frame 1, a hexagonal rod 3 connected to the rotating shaft 2, a connecting shaft 4 fixed to the end of the hexagonal rod 3, and an active clamping plate 5 at the end of the connecting shaft 4. A fixed sleeve 6 is mounted on the base frame 1, and a movable rod 7 is housed within the fixed sleeve 6. A follower clamping plate 8 is located at the end of the movable rod 7. An auxiliary support structure 9 is mounted on the base frame 1, and an adjustment mechanism 10 connected to the connecting shaft 4 and the movable rod 7 is installed on the base frame 1. A protective structure 11 is also provided on the base frame 1. A drive motor 12 is fixed on the base frame 1 and connected to the rotating shaft 2. The adjustment mechanism 10 has bearings, and the connecting shaft 4 and the movable rod 7 are connected to the adjustment mechanism 10 via the bearings.

[0023] The drive motor 12 is used to rotate the rotating shaft 2, hexagonal rod 3, connecting shaft 4 and active clamping plate 5, so that the clamping mechanism has a rotatable effect. The auxiliary support structure 9 can play an auxiliary role in the workpiece clamping process to ensure the accurate clamping of the workpiece. The adjustment mechanism 10 can synchronously adjust the position of the active clamping plate 5 and the follower clamping plate 8, so that the two clamping plates move synchronously to ensure that the workpiece is centered and fixed. The protective structure 11 is used for dust protection.

[0024] When grinding workpieces on a machine tool, the clamping mechanism is fixed on the machine tool, and the workpiece is placed on the auxiliary support structure 9. The height of the auxiliary support structure 9 is adjusted according to the size of the workpiece so that the center of the workpiece corresponds to the middle part of the active clamping plate 5 and the follower clamping plate 8. Then, the adjustment mechanism 10 is activated. In the drive box of the adjustment mechanism 10, the connecting shaft 4 moves on the rotating shaft 2 through the hexagonal rod 3, and the movable rod 7 moves on the fixed sleeve 6, thereby moving the active clamping plate 5 and the follower clamping plate 8 to clamp and fix the workpiece.

[0025] After the workpiece is clamped, the grinding process begins. The grinding mechanism in the machine tool rotates, using a grinding wheel to grind the surface of the workpiece. During this process, the drive motor 12 on the base frame 1 drives the rotating shaft 2 to rotate. The rotating shaft 2, through the hexagonal rod 3, drives the connecting shaft 4 and the active clamping plate 5 to rotate, applying a rotational force to the workpiece. The follower clamping plate 8 at the other end of the workpiece rotates through the movable rod 7, ensuring that the workpiece can rotate during the grinding process, thus improving the grinding effect. During the grinding process, the protective structure 11 plays a role in dust protection, preventing grinding dust from falling onto the relevant structures in the adjustment mechanism 10, ensuring cleanliness.

[0026] According to the above implementation scheme, the auxiliary support structure 9 includes a guide post 901, a guide sleeve 902, a lifting servo motor 903, a lifting screw 904, a lifting sleeve 906, and an elastic support assembly 905. The guide post 901 and the guide sleeve 902 are movably sleeved together, and the guide post 901 is fixed on the base frame 1. The lifting servo motor 903 is fixed on the base frame 1, and the lifting servo motor 903 is connected to the lifting screw 904. The elastic support assembly 905 is fixedly connected to the guide sleeve 902. The lifting sleeve 906 is installed at the lower end of the elastic support assembly 905, and the lifting sleeve 906 is threadedly connected to the lifting screw 904.

[0027] With the auxiliary support structure 9 in place, when clamping the workpiece, the height of the elastic support component 905 can be adjusted by using a lifting servo motor 903, a lifting screw 904, and other structures. The elastic support component 905 can be used to support and place the workpiece, making it easy to move the workpiece to a suitable height and ensuring that the workpiece can be clamped quickly and accurately.

[0028] When using the auxiliary support structure 9, the workpiece is placed on the elastic support assembly 905. The elastic support assembly 905 is provided with a V-groove to ensure that the workpiece is placed in the center. After starting the lifting servo motor 903, the lifting screw 904 rotates and drives the lifting sleeve 906 to move, so that the elastic support assembly 905 moves along the guide post 901 through the guide sleeve 902 until the workpiece is moved to a suitable height. Then, the adjustment mechanism 10 is started to drive the active clamping plate 5 and the follower clamping plate 8 to complete the clamping and fixing of the workpiece. After the workpiece is fixed, the lifting servo motor 903 is started to lower the elastic support assembly 905 to make room.

[0029] The elastic support assembly 905 includes a lifting seat 9051, a movable seat 9052, a countersunk hole 9053, a connecting rod 9054, and a limiting block 9055. The countersunk hole 9053 is formed on the movable seat 9052. The connecting rod 9054 and the limiting block 9055 are fixedly connected, and the connecting rod 9054 and the limiting block 9055 are located in the countersunk hole 9053 on the movable seat 9052. The end of the connecting rod 9054 is threaded to the lifting seat 9051. The two movable seats 9052 are symmetrically arranged relative to the lifting seat 9051. The elastic support assembly 905 also includes a spring 9056 and a universal ball 9057. The spring 9056 is sleeved on the connecting rod 9054, and the end of the spring 9056 abuts against the lifting seat 9051 and the movable seat 9052. The limiting block 9055 is provided with a hexagonal groove, and the outer side of the movable seat 9052 is provided with a circular groove. The universal ball 9057 is fixed in the circular groove on the movable seat 9052.

[0030] The elastic support assembly 905 is equipped with a connecting rod 9054, a spring 9056, and a universal ball 9057. When the workpiece is short, the movable seat 9052 can move along the connecting rod 9054 to make room during the clamping process without affecting the clamping and fixing of the workpiece. The universal ball 9057 allows the elastic support assembly 905 to quickly disengage from the clamping structure.

[0031] When clamping a workpiece, the workpiece is placed on the lifting seat 9051 and the movable seat 9052 in the elastic support assembly 905. Due to the V-grooves on the lifting seat 9051 and the movable seat 9052, the workpiece is positioned in the middle. After the elastic support assembly 905 raises and lowers the workpiece to a suitable height, the active clamping plate 5 and the follower clamping plate 8 are used to clamp and fix the workpiece. If the length of the workpiece is longer than the elastic support assembly 905, after the active clamping plate 5 and the follower clamping plate 8 have clamped the workpiece, the elastic support assembly 905 can be lowered directly to make room. If the workpiece is shorter than the elastic support assembly 905, as clamping progresses, the active clamping plate 5 and the follower clamping plate 8 first contact the universal ball 9057 on the outside of the movable seat 9052. Then, the clamping plates apply force to the movable seat 9052, causing it to move towards the lifting seat 9051 via the connecting rod 9054 inside the countersunk hole 9053. Simultaneously, the spring 9056 is compressed until the workpiece is clamped and fixed. When the elastic support assembly 905 descends, due to the action of the universal ball 9057 and the spring 9056, it can easily descend between the two clamping plates without affecting the clamping and fixing of the workpiece. After the elastic support assembly 905 descends and makes room, the movable seat 9052 moves back to its original position under the action of the spring 9056, and the limiting block 9055 prevents it from falling off. Then, grinding and finishing are performed.

[0032] According to the above implementation scheme, the adjustment mechanism 10 includes a round rod 1001, a movable frame 1002, an adjustment servo motor 1003, and a bidirectional lead screw 1004. The round rod 1001 is fixed on the base frame 1. The two movable frames 1002 are movably connected to the round rod 1001. The adjustment servo motor 1003 and the bidirectional lead screw 1004 are mounted on the base frame 1 and connected to each other. The bidirectional lead screw 1004 passes through the movable frame 1002 and is threadedly connected to the movable frame 1002. Movable grooves are provided on the two movable frames 1002.

[0033] An adjustment mechanism 10 is used to adjust the position of the two movable frames 1002 using a two-way lead screw 1004, so that the connecting shaft 4 carrying the active clamping plate 5 and the movable rod 7 carrying the follower clamping plate 8 can move synchronously, ensuring that the workpiece is centered after being clamped and fixed, thus ensuring grinding accuracy.

[0034] When clamping the workpiece, after starting the adjustment servo motor 1003, the bidirectional lead screw 1004 rotates, causing the two movable frames 1002 to move along the round rod 1001, thereby moving the connecting shaft 4 and the movable rod 7, so that the two clamping plates clamp and fix the workpiece. After the workpiece is clamped, it is ground and rotates together. During this process, the connecting shaft 4 and the movable rod 7 rotate on the movable frame 1002 through the bearings, ensuring the normal operation of the rotation.

[0035] The protective structure 11 includes a protective cover 1101, a connecting plate 1102, and mounting screws 1103. The protective cover 1101 is fixedly connected to the connecting plate 1102, and the mounting screws 1103 are provided on the connecting plate 1102. The protective cover 1101 and the connecting plate 1102 are mounted on the base frame 1 by the mounting screws 1103.

[0036] When installing the protective structure 11, one side of the protective cover 1101 is inserted into the movable groove on the movable frame 1002, and the connecting plate 1102 is fixed using the mounting screws 1103, thus completing the installation of the protective structure 11. During the adjustment and clamping process, the movable frame 1002 moves along the protective cover 1101 through the movable groove, and the adjustment is not affected. During the grinding process, the protective cover 1101 covers the bidirectional lead screw 1004, which serves as a dustproof function, preventing dust and debris from falling onto the bidirectional lead screw 1004 and ensuring the cleanliness of the bidirectional lead screw 1004.

[0037] The foregoing describes the working principle, features, and beneficial effects of this utility model. Those skilled in the art will understand from the foregoing that it does not limit the utility model. The embodiments and description above illustrate the basic principles and features of this utility model. Various changes and improvements can be made to this utility model while remaining consistent with its concept, and all such improvements should fall within the scope of protection claimed by this utility model.

Claims

1. A rotatable clamping mechanism for grinding machine tool workpieces, comprising a base frame (1), wherein a rotating shaft (2) is provided on the base frame (1), and a hexagonal rod (3) is connected to the rotating shaft (2), a connecting shaft (4) is fixed to the end of the hexagonal rod (3), and an active clamping plate (5) is provided at the end of the connecting shaft (4), a fixed sleeve (6) is provided on the base frame (1), and a movable rod (7) is provided in the fixed sleeve (6), and a follower clamping plate (8) is provided at the end of the movable rod (7), characterized in that: The base frame (1) is provided with an auxiliary support structure (9), and the base frame (1) is equipped with an adjustment mechanism (10) connected to the connecting shaft (4) and the movable rod (7). The base frame (1) is provided with a protective structure (11).

2. A rotatable chucking mechanism for use in polishing a workpiece on a machine tool according to claim 1, characterized in that: The auxiliary support structure (9) includes a guide column (901), a guide sleeve (902), a lifting servo motor (903), a lifting screw (904), a lifting sleeve (906), and an elastic support assembly (905). The guide column (901) and the guide sleeve (902) are movably sleeved together, and the guide column (901) is fixed on the base frame (1). The lifting servo motor (903) is fixed on the base frame (1), and the lifting servo motor (903) is connected to the lifting screw (904). The elastic support assembly (905) is fixedly connected to the guide sleeve (902). The lifting sleeve (906) is installed at the lower end of the elastic support assembly (905), and the lifting sleeve (906) is threadedly connected to the lifting screw (904).

3. A rotatable chucking mechanism for use in polishing a workpiece on a machine tool according to claim 2, wherein: The elastic support assembly (905) includes a lifting seat (9051), a movable seat (9052), a countersunk hole (9053), a connecting rod (9054), and a limiting block (9055). The countersunk hole (9053) is formed on the movable seat (9052). The connecting rod (9054) and the limiting block (9055) are fixedly connected, and the connecting rod (9054) and the limiting block (9055) are located in the countersunk hole (9053) on the movable seat (9052). The end of the connecting rod (9054) is threaded to the lifting seat (9051). The two movable seats (9052) are symmetrically arranged relative to the lifting seat (9051).

4. A rotatable chucking mechanism for use in polishing a workpiece on a machine tool according to claim 3, wherein: The elastic support assembly (905) also includes a spring (9056) and a universal ball (9057). The spring (9056) is sleeved on the connecting rod (9054), and the end of the spring (9056) abuts against the lifting seat (9051) and the movable seat (9052). The limiting block (9055) is provided with a hexagonal groove, and the outer side of the movable seat (9052) is provided with a circular groove. The universal ball (9057) is fixed in the circular groove on the movable seat (9052).

5. A rotatable chucking mechanism for use in polishing a workpiece on a machine tool according to claim 4, wherein: The adjustment mechanism (10) includes a round rod (1001), a movable frame (1002), an adjustment servo motor (1003), and a bidirectional lead screw (1004). The round rod (1001) is fixed on the base frame (1). The two movable frames (1002) are movably connected to the round rod (1001). The adjustment servo motor (1003) and the bidirectional lead screw (1004) are mounted on the base frame (1) and connected to each other. The bidirectional lead screw (1004) passes through the movable frame (1002) and is threadedly connected to the movable frame (1002). Movable slots are provided on the two movable frames (1002).

6. A rotatable chucking mechanism for use in polishing a workpiece on a machine tool according to claim 5, wherein: The protective structure (11) includes a protective cover (1101), a connecting plate (1102), and mounting screws (1103). The protective cover (1101) is fixedly connected to the connecting plate (1102), and the mounting screws (1103) are disposed on the connecting plate (1102). The protective cover (1101) and the connecting plate (1102) are mounted on the base frame (1) by the mounting screws (1103).

7. A rotatable chucking mechanism for use in polishing a workpiece on a machine tool according to claim 6, wherein: The base frame (1) is fixed with a drive motor (12), and the drive motor (12) is connected to the rotating shaft (2).

8. A rotatable chucking mechanism for use in polishing a workpiece on a machine tool according to claim 7, wherein: The adjusting mechanism (10) is provided with a bearing, and the connecting shaft (4) and the movable rod (7) are connected to the adjusting mechanism (10) through the bearing.

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