Positioning tool for drilling center hole in ball screw

Abstract

The utility model discloses a ball screw center hole punching positioning tool which comprises two symmetrical fixing frames fixedly connected to the top of a punching device, a threaded rod rotationally connected to an inner cavity located in the right fixing frame, a sliding rod fixedly connected to an inner cavity located in the left fixing frame and a motor fixedly installed on the rear side of the right fixing frame. And an output shaft of the motor penetrates into an inner cavity of the fixing frame on the right side and is fixedly connected with the threaded rod, a connecting plate is arranged at the tops of the two fixing frames, and a fixing plate is fixedly connected to the rear side of the top of the connecting plate. The ball screw is placed on the top of the supporting arc-shaped plate, then the rack, the large gear and the mounting plate are used in cooperation, the ball screw can be tightly clamped and fixed through the two clamps, and the ball screw can be tightly clamped and fixed through the threaded rod, the sliding rod and the threaded block which are used in cooperation. The connecting plate can drive the ball screw to move in the punching direction of the punching device, and finally the punching device can conduct center punching on the ball screw.

Description

Technical Field

[0001] This utility model belongs to the field of ball screw technology, and in particular relates to a positioning tool for drilling a center hole in a ball screw. Background Technology

[0002] Ball screws are the most commonly used transmission components in machine tools and precision machinery. Their main function is to convert rotary motion into linear motion or torque into axial reciprocating force, while also featuring high precision, reversibility, and high efficiency.

[0003] In the machining process of ball screws, center hole positioning is a crucial step to ensure cylindricity. If the ball screw is not positioned correctly during center hole drilling, it will be unable to rotate around the accurate central axis during subsequent outer diameter machining. Therefore, we need to design a ball screw center hole positioning fixture with a gripper structure to keep it fixed during drilling, providing a precise rotation center for subsequent outer diameter machining. This avoids vibration and motion errors caused by eccentricity. Good cylindricity ensures uniform contact between the balls and the screw, thereby reducing frictional wear and extending the service life of the ball screw. Utility Model Content

[0004] The purpose of this utility model is to provide a positioning fixture for drilling the center hole of a ball screw. It has the advantages of being fixed during drilling, providing a precise rotation center for subsequent outer diameter machining, avoiding vibration and motion errors caused by eccentricity, and ensuring uniform contact between the ball and the screw with good cylindricity, thereby reducing friction loss and extending the service life of the ball screw, so as to solve the above-mentioned technical problems.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A ball screw center hole positioning fixture includes two symmetrical fixed frames fixedly connected to the top of the drilling device. A threaded rod is rotatably connected to the inner cavity of the right fixed frame, and a sliding rod is fixedly connected to the inner cavity of the left fixed frame. A motor is fixedly installed on the rear side of the right fixed frame. The output shaft of the motor passes through the inner cavity of the right fixed frame and is fixedly connected to the threaded rod. A connecting plate is provided on the top of the two fixed frames. A fixed plate is fixedly connected to the rear side of the top of the connecting plate. A rack is provided on the top of the connecting plate. Two symmetrical rotating rods are rotatably connected to the surface of the fixed plate. A large gear is fixedly connected to the front side of the surface of the left rotating rod, and the rack meshes with the large gear. A small gear is fixedly connected to the surface of the right rotating rod, and the large gear meshes with the small gear. Clamps are fixedly connected to the rear side of the surfaces of both rotating rods. A cylinder is fixedly installed on the right side of the top of the connecting plate. A mounting plate is fixedly connected to the output end of the cylinder, and the mounting plate is fixedly connected to the rack.

[0006] Preferably, the surface of the threaded rod is threaded with a threaded block, the surface of the slide rod is slidably connected with a sliding block, and the tops of the threaded block and the sliding block are fixedly connected to the connecting plate.

[0007] Preferably, two symmetrical fixing blocks are fixedly connected to the left and right sides of the top of the connecting plate, and the two fixing blocks are slidably connected to the rack.

[0008] Preferably, a mounting cover is fixedly connected to the front side of the top of the connecting plate, and the right side of the inner cavity of the mounting cover is fixedly connected to the cylinder.

[0009] Preferably, two symmetrical support arc plates are fixedly connected to the front and rear sides of the top of the mounting cover, and the tops of the two support arc plates are in close contact with the ball screw.

[0010] Preferably, the surface of the fixing plate has a circular hole through which two rotating rods pass, and the two clamps are tightly fitted to the ball screw on opposite sides.

[0011] The beneficial effects of this utility model are:

[0012] 1. This utility model places the ball screw on top of the supporting arc plate. Then, through the cooperation of the rack, large gear and mounting plate, two clamps tightly hold and fix the ball screw. Through the cooperation of the threaded rod, sliding rod and threaded fastener, the connecting plate drives the ball screw to move in the direction of the drilling device. Finally, the drilling device drills a center hole in the ball screw, which achieves the purpose of fixing it during drilling. This provides a precise rotation center for subsequent outer diameter machining, avoids vibration and motion errors caused by eccentricity, and ensures uniform contact between the ball and the screw, thereby reducing friction loss and extending the service life of the ball screw.

[0013] 2. This utility model uses the cooperation of the threaded fastener and the sliding block. When the threaded rod and the sliding rod drive the threaded fastener and the motor to move, the threaded fastener and the sliding block play a guiding role for the connecting plate, ensuring that the connecting plate will not deviate from its position when moving, and improving the stability of the connecting plate during use.

[0014] 3. This utility model uses the cooperation of fixing blocks and fixing plates. When the fixing plate rotates between the two fixing blocks, the two fixing blocks limit the fixing plate, ensuring that the fixing plate will not fall off the fixing blocks when rotating, thus improving the stability of the fixing plate when sliding.

[0015] 4. By setting up a supporting arc plate, the present invention provides support for the ball screw, ensuring that the ball screw will not shift its position when drilling the center hole, thus improving the stability of the ball screw when drilling the center hole. Attached Figure Description

[0016] The advantages of the present invention, as described above and / or in the following detailed description in conjunction with the accompanying drawings, will become clearer and more readily understood. These drawings are merely illustrative and do not limit the scope of the present invention.

[0017] Figure 1 This is a front view schematic diagram of one embodiment of the present utility model;

[0018] Figure 2 This is a three-dimensional schematic diagram of a threaded rod and a supporting arc plate according to an embodiment of the present invention;

[0019] Figure 3 This is a three-dimensional schematic diagram of a threaded fastener and a connecting plate according to an embodiment of the present invention;

[0020] Figure 4 This is a perspective view of a large gear and a clamp according to an embodiment of the present invention;

[0021] Figure 5 This is one embodiment of the present utility model. Figure 4 A magnified view of point A in the middle.

[0022] The attached diagram lists the components represented by each number as follows:

[0023] 1. Drilling device; 2. Fixing frame; 3. Threaded rod; 4. Sliding rod; 5. Threaded fastener; 6. Sliding block; 7. Motor; 8. Connecting plate; 9. Fixing block; 10. Fixing plate; 11. Rack; 12. Rotating rod; 13. Large gear; 14. Small gear; 15. Clamp; 16. Mounting cover; 17. Cylinder; 18. Mounting plate; 19. Supporting arc plate. Detailed Implementation

[0024] In the following description, embodiments of the ball screw center hole positioning fixture of the present invention will be described with reference to the accompanying drawings.

[0025] Figure 1-5This invention illustrates a ball screw center hole positioning fixture according to an embodiment of the present invention. It includes two symmetrical fixed frames 2 fixedly connected to the top of a drilling device 1. A threaded rod 3 is rotatably connected to the inner cavity of the right fixed frame 2, and a sliding rod 4 is fixedly connected to the inner cavity of the left fixed frame 2. A motor 7 is fixedly mounted on the rear side of the right fixed frame 2, and the output shaft of the motor 7 passes through the inner cavity of the right fixed frame 2 and is fixedly connected to the threaded rod 3. A connecting plate 8 is provided at the top of the two fixed frames 2. A threaded block 5 is threadedly connected to the surface of the threaded rod 3, and a sliding block 6 is slidably connected to the surface of the sliding rod 4. The tops of the threaded block 5 and the sliding block 6 are fixedly connected to the connecting plate 8 via threads. The coordinated use of the fast 5 and sliding block 6 ensures that when the threaded rod 3 and sliding rod 4 drive the fast 5 and motor 7 to move, the fast 5 and sliding block 6 guide the connecting plate 8, preventing it from shifting position during movement and improving its stability during use. A fixing plate 10 is fixedly connected to the rear side of the top of the connecting plate 8. A rack 11 is installed on the top of the connecting plate 8. Two symmetrical fixing blocks 9 are fixedly connected to the left and right sides of the top of the connecting plate 8. The two fixing blocks 9 are slidably connected to the rack 11. Through the coordinated use of the fixing blocks 9 and the fixing plate 10, when the fixing plate 10 rotates between the two fixing blocks 9, the two fixing blocks 9 guide the fixing plate 10. 0 serves as a limit switch, ensuring that the fixed plate 10 does not detach from the fixed block 9 during rotation, thus improving the stability of the fixed plate 10 during sliding. Two symmetrical rotating rods 12 are rotatably connected to the surface of the fixed plate 10. A large gear 13 is fixedly connected to the front side of the surface of the left rotating rod 12, with a rack 11 meshing with the large gear 13. A small gear 14 is fixedly connected to the surface of the right rotating rod 12, with the large gear 13 meshing with the small gear 14. Clips 15 are fixedly connected to the rear side of the surfaces of both rotating rods 12. A cylinder 17 is fixedly installed on the right side of the top of the connecting plate 8. A mounting cover 16 is fixedly connected to the front side of the top of the connecting plate 8. Inside the mounting cover 16... The right side of the cavity is fixedly connected to the cylinder 17. The output end of the cylinder 17 is fixedly connected to the mounting plate 18. The mounting plate 18 is fixedly connected to the rack 11. Two symmetrical support arc plates 19 are fixedly connected to the front and rear sides of the top of the mounting cover 16. The top of the two support arc plates 19 is tightly fitted with the ball screw. Through the setting of the support arc plates 19, the support arc plates 19 play a supporting role for the ball screw, ensuring that the ball screw will not shift its position when drilling the center hole, and improving the stability of the ball screw when drilling the center hole. The surface of the fixing plate 10 is provided with a round hole for the two rotating rods 12 to pass through. The opposite side of the two clamps 15 is tightly fitted with the ball screw.

[0026] Working Principle: In use, the user places the ball screw on top of the two supporting arc plates 19, then activates the cylinder 17. The output end of the cylinder 17 moves the mounting plate 18, which in turn moves the fixing plate 10 within the inner cavity of the two fixing blocks 9. Simultaneously, the rack 11 meshes with the large gear 13, causing it to rotate. The large gear 13 meshes with the small gear 14, causing it to rotate. This, in turn, causes the large gear 13 and small gear 14 to rotate, which in turn drives the two rotating rods 12 to rotate in opposite directions. The two rotating rods 12 then rotate the two... The two clamps 15 rotate in opposite directions, clamping and fixing the ball screw at the top of the supporting arc plate 19. At this time, the ball screw is fixed and its center position is aligned with the center position of the drilling device 1. Then, the motor 7 is turned on, which drives the threaded rod 3 to rotate. The threaded rod 3 then drives the threaded block 5 to move in the inner cavity of the fixed frame 2, so that the threaded block 5 drives the left sliding block 6 to slide on the surface of the slide rod 4 through the connecting plate 8. Then, the threaded block 5 and the sliding block 6 drive the connecting plate 8 to move backward. Finally, the drilling device 1 drills a hole in the ball screw clamped between the two clamps 15.

[0027] In summary, this ball screw center hole positioning fixture places the ball screw on top of the supporting arc plate 19. The rack 11, large gear 13, and mounting plate 18 work together to tightly clamp and fix the ball screw in place by two clamps 15. The threaded rod 3, sliding rod 4, and threaded fastener 5 work together to move the connecting plate 8 towards the drilling direction of the drilling device 1. Finally, the drilling device 1 drills a center hole in the ball screw, achieving a fixed position during drilling. This provides a precise rotation center for subsequent outer diameter machining, avoiding vibration and motion errors caused by eccentricity. Good cylindricity ensures uniform contact between the balls and the screw, reducing frictional wear and extending the service life of the ball screw.

Claims

1. A positioning fixture for drilling a center hole in a ball screw, characterized in that, The device includes two symmetrical fixed frames (2) fixedly connected to the top of the drilling device (1). A threaded rod (3) is rotatably connected to the inner cavity of the right fixed frame (2), and a sliding rod (4) is fixedly connected to the inner cavity of the left fixed frame (2). A motor (7) is fixedly installed on the rear side of the right fixed frame (2). The output shaft of the motor (7) passes through the inner cavity of the right fixed frame (2) and is fixedly connected to the threaded rod (3). A connecting plate (8) is provided on the top of the two fixed frames (2). A fixing plate (10) is fixedly connected to the rear side of the top of the connecting plate (8). A rack (11) is provided on the top of the connecting plate (8). The fixing plate (10) is fixedly connected to the rear side of the top of the connecting plate (8). A rack (11) is provided on the top of the connecting plate (8). The surface of the connecting plate (8) has two symmetrical rotating rods (12). A large gear (13) is fixedly connected to the front side of the surface of the left rotating rod (12), and the rack (11) meshes with the large gear (13). A small gear (14) is fixedly connected to the surface of the right rotating rod (12), and the large gear (13) meshes with the small gear (14). Clips (15) are fixedly connected to the rear side of the surfaces of the two rotating rods (12). A cylinder (17) is fixedly installed on the right side of the top of the connecting plate (8). An installation plate (18) is fixedly connected to the output end of the cylinder (17), and the installation plate (18) is fixedly connected to the rack (11).

2. The ball screw center hole positioning fixture according to claim 1, characterized in that, The threaded rod (3) has a threaded block (5) threadedly connected to its surface, and the slide rod (4) has a sliding block (6) slidably connected to its surface. The tops of the threaded block (5) and the sliding block (6) are fixedly connected to the connecting plate (8).

3. The ball screw center hole positioning fixture according to claim 2, characterized in that, Two symmetrical fixing blocks (9) are fixedly connected to the left and right sides of the top of the connecting plate (8), and the two fixing blocks (9) are slidably connected to the rack (11).

4. The ball screw center hole positioning fixture according to claim 3, characterized in that, The front side of the top of the connecting plate (8) is fixedly connected to the mounting cover (16), and the right side of the inner cavity of the mounting cover (16) is fixedly connected to the cylinder (17).

5. The ball screw center hole positioning fixture according to claim 4, characterized in that, The mounting cover (16) has two symmetrical support arc plates (19) fixedly connected to its front and rear sides, and the tops of the two support arc plates (19) are in close contact with the ball screw.

6. The ball screw center hole positioning fixture according to claim 5, characterized in that, The surface of the fixing plate (10) is provided with a round hole for the two rotating rods (12) to pass through, and the two clamps (15) are tightly fitted to the ball screw on opposite sides.

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