Ball screw pre-tightening device of numerical control machine tool

Abstract

The utility model relates to the technical field of ball screws, and discloses a ball screw pre-tightening device of a numerical control machine tool, which comprises a workbench, the top of the workbench is fixedly connected with a mounting shell, the front end of the mounting shell is rotatably connected with a round block, the front end of the round block is fixedly connected with a first clamping plate, and the first clamping plate is fixedly connected with a second clamping plate. The top of the first clamping plate is fixedly connected with a plurality of first friction protruding blocks, the two sides of the first clamping plate are both in threaded connection with first threaded rods, and the tops of the first threaded rods are fixedly connected with rotary knobs. According to the ball screw pre-tightening device of the numerical control machine tool, a worker places a ball screw on the top of a first clamping plate, then a knob is screwed downwards to rotate a first threaded rod, and the first threaded rod is in threaded connection with the first clamping plate, so that when the first threaded rod moves downwards, the knob is driven to press a second clamping plate downwards to clamp and fix the ball screw; a worker can suspend and fix the ball screw, the worker can conveniently conduct pre-tightening operation on the ball screw, meanwhile, the device is suitable for the ball screw with the body size, and actual use is more convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of ball screws, in particular to a ball screw pre-tightening device for a numerically controlled machine tool. Background Art

[0002] Ball screws are ideal products for converting rotary motion into linear motion, or linear motion into rotary motion. They are the most commonly used transmission elements in tool machinery and precision machinery. Their main function is to convert rotary motion into linear motion, or torque into axial repetitive force. Due to their very small friction resistance, ball screws are widely used in various industrial equipment and precision instruments.

[0003] With respect to the above-mentioned and existing related technologies, the inventors believe that the following defects often exist: the existing ball screw preload device is usually unable to adjust the preload device according to the size of the ball screw to fix the ball screw, which makes it inconvenient for the staff to replace the ball screws of different sizes using the preload device, thereby increasing the difficulty of the staff to operate the ball screw and reducing the practicality of the device. Utility Model Content

[0004] The technical problem to be solved by the utility model is that the prior art has the disadvantage of being inconvenient to fix ball screws of different sizes. For this reason, we propose a ball screw pre-tightening device for a CNC machine tool.

[0005] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme: a ball screw pre-tensioning device for a CNC machine tool, comprising a workbench, the top of the workbench is fixedly connected to a mounting shell, the front end of the mounting shell is rotatably connected to a round block, the front end of the round block is fixedly connected to a first clamping plate, the top of the first clamping plate is fixedly connected to a plurality of first friction protrusion blocks, both sides of the first clamping plate are threadedly connected to a first threaded rod, the top of the first threaded rod is fixedly connected to a knob, the surface of the first threaded rod is slidably connected to a second clamping plate, and the bottom of the second clamping plate is fixedly connected to a plurality of second friction protrusion blocks.

[0006] Preferably, a threaded hole is provided on the surface of the round block, a screw is provided on the top of the mounting shell, and an inner wall of the screw is connected with a polygonal groove.

[0007] Preferably, a servo motor is fixedly connected to the rear end of the mounting shell, a transmission rod is installed at the output end of the servo motor, and a front end of the transmission rod is fixedly connected to the round block.

[0008] Preferably, the front end of the round block is fixedly connected to an L-shaped plate, the top end of the L-shaped plate is fixedly connected to a spring, and the bottom of the spring is fixedly connected to the second clamping plate.

[0009] Preferably, the first friction protrusion block and the second friction protrusion block are both made of rubber material.

[0010] Preferably, a slide groove is provided on the top of the workbench, a slide rod is fixedly connected to the inner wall of the slide groove, an extension plate is slidably connected to the surface of the slide rod, a second threaded rod is threadedly connected to the top of the extension plate, and a funnel is fixedly connected to the bottom of the second threaded rod.

[0011] Preferably, a circular groove is provided inside the extension plate, a plurality of round balls are slidably connected inside the circular groove, and the surfaces of the round balls are slidably connected to the sliding rod.

[0012] Technical effects and advantages of the utility model:

[0013] In the utility model, a staff member places the ball screw on the top of the first clamping plate and then turns the knob downward to rotate the first threaded rod. The first threaded rod is connected to the first clamping plate through a thread. When the first threaded rod moves downward, it drives the knob to press the second clamping plate downward to clamp and fix the ball screw. The staff can fix the ball screw in the air, which is convenient for the staff to pre-tighten the ball screw. At the same time, the device is suitable for ball screws of the same size as the main body, which is more convenient for practical use.

[0014] In the utility model, a worker pushes the extension plate to slide on the surface of the slide rod, adjusts the position of the funnel to the top of the ball screw, and then screws the second threaded rod downward to adjust the height of the funnel, so that the worker can add lubricating oil into the funnel and drip it onto the surface of the ball screw to lubricate the screw. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0016] Figure 2 It is a cross-sectional view of the clamping structure of the utility model;

[0017] Figure 3 For this utility model Figure 2 A partial enlarged view of the middle A;

[0018] Figure 4 This is a cross-sectional view of the slide bar structure of the utility model;

[0019] Figure 5 For this utility model Figure 4 A partial enlarged view of point B in the middle.

[0020] Legend: 1. Workbench; 2. Mounting shell; 3. Round block; 4. First clamping plate; 5. First friction protrusion block; 6. First threaded rod; 7. Knob; 8. Second clamping plate; 9. Second friction protrusion block; 10. Threaded hole; 11. Screw; 12. Polygonal groove; 13. Servo motor; 14. Transmission rod; 15. L-shaped plate; 16. Spring; 17. Slide groove; 18. Slide rod; 19. Extension plate; 20. Second threaded rod; 21. Funnel; 22. Round groove; 23. Round ball. DETAILED DESCRIPTION

[0021] The present invention will now be further described in detail in conjunction with the accompanying drawings and preferred embodiments. These drawings are simplified schematic diagrams that only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0022] Reference Figure 1 , Figure 2 and Figure 3 As shown, the utility model provides a technical solution: a ball screw preload device for a CNC machine tool, comprising a workbench 1, a mounting shell 2 is fixedly connected to the top of the workbench 1, a round block 3 is rotatably connected to the front end of the mounting shell 2, a first clamping plate 4 is fixedly connected to the front end of the round block 3, a plurality of first friction protrusion blocks 5 are fixedly connected to the top of the first clamping plate 4, first threaded rods 6 are threadedly connected to both sides of the first clamping plate 4, a knob 7 is fixedly connected to the top of the first threaded rod 6, a second clamping plate 8 is slidably connected to the surface of the first threaded rod 6, and the second clamping plate 8 A plurality of second friction protrusions 9 are fixedly connected to the bottom. The staff puts the ball screw on the top of the first clamping plate 4 and then turns the knob 7 downward to rotate the first threaded rod 6. The first threaded rod 6 is threadedly connected to the first clamping plate 4 so that when the first threaded rod 6 moves downward, it drives the knob 7 to press the second clamping plate 8 downward to clamp and fix the ball screw, so that the staff can fix the ball screw in the air, which is convenient for the staff to pre-tighten the ball screw. At the same time, the device is suitable for ball screws of the same size as the main body, which is more convenient for practical use.

[0023] Reference Figure 2 and Figure 3 As shown, in this embodiment: a threaded hole 10 is provided on the surface of the round block 3, a screw 11 is provided on the top of the mounting shell 2, and the inner wall of the screw 11 is connected to a polygonal groove 12. The staff member screws the screw 11 downward, and the screw 11 is threadedly connected to the threaded hole 10, so that the screw 11 moves to the inner wall of the polygonal groove 12 and abuts against the surface of the polygonal groove 12. The flat design of the groove wall of the polygonal groove 12 fixes the position of the round block 3, so that the round block 3 no longer rotates, so that the staff member can perform rotational pre-tightening operation on the ball screw.

[0024] Reference Figure 1 , Figure 2 and Figure 3 As shown, in this embodiment: the rear end of the mounting shell 2 is fixedly connected to a servo motor 13, the output end of the servo motor 13 is installed with a transmission rod 14, the front end of the transmission rod 14 is fixedly connected to the round block 3, and the staff starts the servo motor 13 to drive the transmission rod 14 to rotate, so that the round block 3 rotates, so that the staff can rotate the ball screw to adjust the position of the ball.

[0025] Reference Figure 2 and Figure 3 As shown, in the present embodiment: the front end of the round block 3 is fixedly connected with an L-shaped plate 15, the top of the L-shaped plate 15 is fixedly connected with a spring 16, the bottom of the spring 16 is fixedly connected with the second clamping plate 8, when the staff turns the knob 7 to push the second clamping plate 8 to move downward, the second clamping plate 8 pulls the spring 16 to extend to accumulate force, when the staff releases the contact of the knob 7 with the second clamping plate 8, the spring 16 releases the force generated, rebounds and pulls the second clamping plate 8 to move upward, and resets the position of the second clamping plate 8, so that the staff can release the clamping of the second clamping plate 8 and the first clamping plate 4 on the ball screw.

[0026] Reference Figure 2 and Figure 3 As shown, in this embodiment: the first friction protrusion block 5 and the second friction protrusion block 9 are both made of rubber material. When the staff uses the second clamping plate 8 and the first clamping plate 4 to clamp the ball screw, the friction force between the second clamping plate 8 and the first friction protrusion block 5 and the ball screw is increased through the rubber material setting of the first friction protrusion block 5 and the second friction protrusion block 9. At the same time, the soft nature of the rubber block protects the ball screw and is not easy to clamp the ball screw.

[0027] Reference Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, in this embodiment: a slide groove 17 is provided on the top of the workbench 1, and a slide rod 18 is fixedly connected to the inner wall of the slide groove 17, and an extension plate 19 is slidably connected to the surface of the slide rod 18, and a second threaded rod 20 is threadedly connected to the top of the extension plate 19, and a funnel 21 is fixedly connected to the bottom of the second threaded rod 20. The staff pushes the extension plate 19 to slide on the surface of the slide rod 18, adjusts the position of the funnel 21 to the top of the ball screw, and then adjusts the height of the funnel 21 by screwing the second threaded rod 20 downward, so that the staff can add lubricating oil into the funnel 21 and drip it onto the surface of the ball screw to lubricate the screw.

[0028] Reference Figure 4 and Figure 5As shown, in the present embodiment: a circular groove 22 is provided inside the extension plate 19, and a plurality of round balls 23 are slidably connected inside the circular groove 22, and the surface of the round balls 23 is slidably connected to the slide bar 18. When the extension plate 19 slides on the surface of the slide bar 18, the plurality of round balls 23 rolling on the inner wall of the circular groove 22 reduce the contact area between the extension plate 19 and the slide bar 18, thereby reducing the friction force generated by the sliding between the extension plate 19 and the slide bar 18, so that the extension plate 19 runs more smoothly and is more conducive to the staff pushing the extension plate 19 to adjust the position.

[0029] The practical working principle of the present invention is as follows: the staff puts the ball screw on the top of the first clamping plate 4, and then turns the knob 7 downward to rotate the first threaded rod 6. The first threaded rod 6 is connected to the first clamping plate 4 through the thread. When the first threaded rod 6 moves downward, it drives the knob 7 to press the second clamping plate 8 downward to clamp and fix the ball screw. The staff can fix the ball screw in the air, which is convenient for the staff to pre-tighten the ball screw. At the same time, the device is suitable for ball screws of the same size as the main body, which is more convenient for actual use. The staff turns the screw 11 downward, and the screw 11 is connected to the threaded hole 10 through the thread. The wire 11 moves to the inner wall of the polygonal groove 12 and abuts against the surface of the polygonal groove 12. The flat design of the groove wall of the polygonal groove 12 fixes the position of the round block 3, so that the round block 3 no longer rotates, so that the staff can perform rotational pre-tightening operation on the ball screw. The staff starts the servo motor 13 to drive the transmission rod 14 to rotate, so that the round block 3 rotates, so that the staff can rotate the ball screw to adjust the position of the ball. When the staff turns the knob 7 to push the second clamping plate 8 to move downward, the second clamping plate 8 pulls the spring 16 to extend and store force. When the staff releases the abutment of the knob 7 against the second clamping plate 8, the spring 16 is extended to store force. 16 releases the force generated, rebounds and pulls the second clamping plate 8 upward to reset the position of the second clamping plate 8, so that the staff can release the clamping of the second clamping plate 8 and the first clamping plate 4 on the ball screw. When the staff uses the second clamping plate 8 and the first clamping plate 4 to clamp the ball screw, the friction between the second clamping plate 8 and the first friction protrusion block 5 on the ball screw is increased by the rubber material setting of the first friction protrusion block 5 and the second friction protrusion block 9. At the same time, the soft nature of the rubber block protects the ball screw and is not easy to clamp the ball screw. The staff pushes the extension plate 19 to slide on the surface of the slide rod 18 Move to adjust the position of the funnel 21 to the top of the ball screw, and then the staff can adjust the height of the funnel 21 by screwing the second threaded rod 20 downward, so that the staff can add lubricating oil into the funnel 21 and drip it onto the surface of the ball screw to lubricate the screw. When the extension plate 19 slides on the surface of the slide rod 18, a plurality of round balls 23 rolling on the inner wall of the circular groove 22 reduce the contact area between the extension plate 19 and the slide rod 18, and reduce the friction generated by the sliding between the extension plate 19 and the slide rod 18, so that the extension plate 19 runs more smoothly and is more conducive to the staff to push the extension plate 19 to adjust the position.

[0030] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A ball screw preload device for a numerically controlled machine tool, comprising a workbench (1), characterized in that: The top of the workbench (1) is fixedly connected to a mounting shell (2), the front end of the mounting shell (2) is rotatably connected to a round block (3), the front end of the round block (3) is fixedly connected to a first clamping plate (4), the top of the first clamping plate (4) is fixedly connected to a plurality of first friction protrusion blocks (5), both sides of the first clamping plate (4) are threadedly connected to a first threaded rod (6), the top of the first threaded rod (6) is fixedly connected to a knob (7), the surface of the first threaded rod (6) is slidably connected to a second clamping plate (8), and the bottom of the second clamping plate (8) is fixedly connected to a plurality of second friction protrusion blocks (9).

2. The ball screw preload device for a CNC machine tool according to claim 1, characterized in that: A threaded hole (10) is provided on the surface of the round block (3), a screw (11) is provided on the top of the mounting shell (2), and a polygonal groove (12) is connected to the inner wall of the screw (11).

3. The ball screw preload device for a CNC machine tool according to claim 1, characterized in that: A servo motor (13) is fixedly connected to the rear end of the mounting shell (2), a transmission rod (14) is installed at the output end of the servo motor (13), and a front end of the transmission rod (14) is fixedly connected to the round block (3).

4. The ball screw preload device for a CNC machine tool according to claim 1, characterized in that: The front end of the round block (3) is fixedly connected to an L-shaped plate (15), the top end of the L-shaped plate (15) is fixedly connected to a spring (16), and the bottom of the spring (16) is fixedly connected to the second clamping plate (8).

5. The ball screw preload device for a CNC machine tool according to claim 1, characterized in that: The first friction protrusion block (5) and the second friction protrusion block (9) are both made of rubber material.

6. The ball screw preload device for a CNC machine tool according to claim 1, characterized in that: The top of the workbench (1) is provided with a slide groove (17), the inner wall of the slide groove (17) is fixedly connected with a slide rod (18), the surface of the slide rod (18) is slidably connected with an extension plate (19), the top end of the extension plate (19) is threadedly connected with a second threaded rod (20), and the bottom of the second threaded rod (20) is fixedly connected with a funnel (21).

7. The ball screw preload device for a CNC machine tool according to claim 6, characterized in that: A circular groove (22) is provided inside the extension plate (19), a plurality of round balls (23) are slidably connected inside the circular groove (22), and the surface of the round balls (23) is slidably connected to the slide rod (18).

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