An extra-long screw support structure

Abstract

The utility model provides an extra-long lead screw support structure, including a bed, a servo motor is fixed on the upper surface of the bed, the output shaft of the servo motor is connected to the extra-long lead screw through a coupling transmission, and the bottoms of both ends of the extra-long lead screw are supported and fixed by the lead screw front support and the lead screw rear support. The outer peripheral thread of the extra-long lead screw is connected to a lead screw nut pair that is displaced between the lead screw front support and the lead screw rear support, and the lead screw nut pair is connected to the rotating spindle of the machine tool. A support structure is provided in the middle of the extra-long lead screw, and the support structure includes a mounting plate, a guide column cylinder fixed to the mounting plate, a support plate and a lead screw support that are telescoped in the vertical direction by the guide column cylinder, and an arc-shaped concave is provided on the upper surface of the lead screw support to cooperate with the extra-long lead screw. The utility model supports the middle part of the extra-long lead screw by providing a support structure, thereby solving the problem of gravity sagging after the extra-long lead screw is installed, reducing the jitter problem of the extra-long lead screw when rotating at high speed, and improving the service life of the extra-long lead screw.

Description

Technical Field

[0001] The utility model belongs to the technical field of metal processing equipment, and in particular relates to an extra-long lead screw supporting structure. Background Art

[0002] A grinder is a machine that uses a grinding tool coated with or embedded with abrasives to grind the surface of a workpiece. It is mainly used to grind high-precision planes, internal and external cylindrical surfaces, conical surfaces, spherical surfaces, threaded surfaces and other surfaces in the workpiece, and is used for single-sided grinding and polishing of materials.

[0003] At present, CNC horizontal honing machines are generally used for honing of extra-long holes. In order to ensure the load stability of the honing machine during movement, screw transmission is generally used. Extra-long screws (length-to-diameter ratio greater than 60 times) will experience gravity sag after installation and jitter of the machine tool during rapid rotation, making it impossible to accurately monitor the processing load. Utility Model Content

[0004] The utility model aims to provide an extra-long lead screw support structure, characterized in that it comprises a bed, a servo motor is fixed on the upper surface of the bed, an output end of the servo motor is connected to an extra-long lead screw through a coupling, two ends of the extra-long lead screw are respectively fixed to the movable support of the bed through a lead screw front support and a lead screw rear support, a lead screw nut pair displaced between the lead screw front support and the lead screw rear support is connected to the outer peripheral thread of the extra-long lead screw, and is located in the middle of the extra-long lead screw, and a lead screw support structure is also provided on the upper surface of the bed;

[0005] The screw support structure includes a screw support and a guide column cylinder for moving the screw support in a vertical direction. When the screw nut pair is not located above the screw support structure, the upper surface of the screw support abuts against the bottom of the extra-long screw.

[0006] Furthermore, the number of the guide column cylinders is two, and the two guide column cylinders are respectively arranged on both sides of the extra-long lead screw;

[0007] The screw support structure also includes a mounting plate and a support plate. The mounting plate is arranged on the upper surface of the bed. The two guide column cylinders are fixed to the bed through the mounting plate. The support plate is used to connect the two guide column cylinders and the screw support. The screw support is fixed to the middle part of the upper surface of the support plate. The telescopic axes of the two guide column cylinders are respectively fixed to the bottom of both ends of the support plate.

[0008] Furthermore, it also includes an oil baffle plate, the two ends of which are respectively connected to the front support of the screw and the rear support of the screw, and are fixed to the upper surface of the bed through the front support of the screw and the rear support of the screw.

[0009] Furthermore, the screw nut pair is connected to a carriage through a nut seat, the nut seat is arranged on the bottom surface of the carriage, and the upper surface of the carriage is fixed with a rotating spindle of the machine tool.

[0010] Compared with the prior art, the beneficial effects of the utility model are mainly reflected in: a support structure is provided to support the middle part of the extra-long screw, thereby preventing the screw from shaking due to gravity and the rapid rotation of the extra-long screw when the rotating spindle moves to the middle part of the extra-long screw, thereby realizing accurate monitoring of the processing load. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the utility model.

[0012] Figure 2 for Figure 1 Schematic diagram of the support structure.

[0013] Figure 3 The utility model is a schematic diagram of the connection between an extra-long screw support structure and a carriage.

[0014] Among them, 1. Screw nut pair; 2. Screw rear support; 3. Screw front support; 4. Servo motor; 5. Coupling; 6. Oil baffle plate; 7. Guide column cylinder; 8. Mounting plate; 9. Support plate; 10. Screw support; 11. Bed; 12. Nut seat; 13. Drag plate; 14. Extra-long screw. DETAILED DESCRIPTION

[0015] The following will provide a more detailed description of an extra-long screw support structure of the utility model in conjunction with a schematic diagram, in which a preferred embodiment of the utility model is shown. It should be understood that those skilled in the art can modify the utility model described herein and still achieve the beneficial effects of the utility model. Therefore, the following description should be understood as being widely known to those skilled in the art and not as a limitation to the utility model.

[0016] like Figure 1 As shown, an extra-long screw support structure includes a bed 11 and a servo motor 4, a coupling 5, an extra-long screw 14, a screw nut pair 1, a support structure, an oil baffle 6, a screw front support 3 and a screw rear support 2, all of which are arranged on the upper surface of the bed 11.

[0017] The output end of the servo motor 4 is connected to the extra-long lead screw 14 through the coupling 5. The left and right ends of the extra-long lead screw 14 are respectively movably fixed above the lead screw front support 3 and the lead screw rear support 2, so as to fix the extra-long lead screw 14 above the bed 11. The outer peripheral thread of the extra-long lead screw 14 is connected to a lead screw nut pair 1. When the servo motor 4 drives the extra-long lead screw 14 to rotate, the lead screw nut pair 1 moves between the lead screw front support 3 and the lead screw rear support 2.

[0018] refer to Figure 2, in the middle of the extra-long lead screw 14, a support structure is fixed on the upper surface of the bed 1, and the support structure includes a mounting plate 8, a guide column cylinder 7, a lead screw support 10 and a support plate 9. The mounting plate is fixed to the surface of the bed by bolts, and there are two guide column cylinders, which are respectively arranged on both sides of the extra-long lead screw and fixed to the surface of the bed 11 through the mounting plate 8. The support plate 9 is roughly "concave" shaped, and its two sides are supported and connected by two guide column cylinders 7. The lead screw support 10 is fixed to the middle of the concave part of the support plate 9 by bolts, and a circular arc-shaped concave matching the extra-long lead screw 14 is arranged in the middle thereof. When the telescopic shaft of the guide column cylinder 7 is extended, the lead screw support 10 moves upward; when the telescopic shaft of the guide column cylinder 7 is retracted, the lead screw support 10 moves downward.

[0019] The utility model is also provided with an oil baffle plate 6 , the two ends of which are respectively connected to the front support 3 of the screw and the rear support 2 of the screw, and the oil baffle plate 6 is fixed to the upper surface of the bed 11 through the front support 3 of the screw and the rear support 2 of the screw.

[0020] The utility model machine tool is a CNC grinding machine tool, which is internally provided with a sensor for sensing the position of the lead screw thread pair 1. The sensor is connected to the CNC grinding machine tool signal, and the CNC grinding machine tool drives the servo motor 4 and the guide column cylinder 7 of the supporting structure to operate. Figure 3 As shown, the screw-nut pair 1 is connected to a nut seat 12 (the figure shows the nut seat, and the nut seat and the screw-nut pair have been separated). The nut seat 12 is fixed to the bottom of a carriage 13, and the carriage 13 is movably connected to the bed 11 through preset tracks on both sides of an extra-long screw 14. The upper surface of the carriage 13 is fixed with the rotating spindle of the machine tool.

[0021] The operation process of this utility model is:

[0022] When the sensor senses that the lead screw nut pair 1 is close to the support structure, the CNC grinding machine drives the guide column cylinder 7 to retract the lead screw support 10. When the lead screw nut pair 1 is above the support structure, the lead screw nut pair 1 can pass through the support structure. When the sensor senses that the lead screw nut pair 1 is away from the support structure and is not above the support structure, the CNC grinding machine drives the guide column cylinder 7 to prop up the lead screw support 10. The bottom of the extra-long lead screw 14 cooperates with and conflicts with the arc-shaped concave of the lead screw support 10, thereby completing the support of the extra-long lead screw 14.

[0023] The above are only preferred embodiments of the present invention and do not limit the present invention in any way. Any technician in the relevant technical field, without departing from the scope of the technical solution of the present invention, may make any equivalent replacement or modification to the technical solution and technical content disclosed in the present invention, which shall be deemed as the content of the technical solution of the present invention and still fall within the protection scope of the present invention.

Claims

1. An extra-long screw support structure, characterized in that: The machine comprises a bed (11), a servo motor (4) being fixed on the upper surface of the bed, an output end of the servo motor being connected to an extra-long lead screw (14) via a coupling (5), two ends of the extra-long lead screw being respectively fixed to the movable support of the bed via a lead screw front support (3) and a lead screw rear support (2), a lead screw nut pair (1) being displaced between the lead screw front support and the lead screw rear support being connected via an outer thread of the extra-long lead screw and being located in the middle of the extra-long lead screw, and a lead screw support structure being further provided on the upper surface of the bed; The screw support structure comprises a screw support (10) and a guide column cylinder (7) for enabling the screw support to move in a vertical direction. When the screw nut pair is not located above the screw support structure, the upper surface of the screw support abuts against the bottom of the extra-long screw.

2. The super-long screw support structure according to claim 1, characterized in that: The number of the guide column cylinders is two, and the two guide column cylinders are respectively arranged on both sides of the super-long lead screw; The screw support structure also includes a mounting plate (8) and a support plate (9), wherein the mounting plate is arranged on the upper surface of the bed, and the two guide column cylinders are fixed to the bed through the mounting plate, and the support plate is used to connect the two guide column cylinders and the screw support, and the screw support is fixed to the middle part of the upper surface of the support plate, and the telescopic shafts of the two guide column cylinders are respectively fixed to the bottom of both ends of the support plate.

3. The super-long screw support structure according to claim 1, characterized in that: It also includes an oil baffle plate (6), the two ends of which are respectively connected to the front support of the lead screw and the rear support of the lead screw, and are fixed to the upper surface of the bed through the front support of the lead screw and the rear support of the lead screw.

4. The super-long screw support structure according to claim 1, characterized in that: The screw nut pair is connected to a carriage (13) via a nut seat (12); the nut seat is arranged on the bottom surface of the carriage; and a rotating spindle of the machine tool is fixed on the top surface of the carriage.

5. The super-long screw support structure according to claim 1, characterized in that: It also includes a sensor for sensing the position of the lead screw nut pair, and the sensor is connected to the numerical control device signal.

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