Ball screw internal thread grinding machine

Abstract

The utility model discloses a ball screw internal thread grinding machine which comprises a grinding table. Four supporting columns are fixedly connected to the upper end of the grinding table, a sliding plate is slidably connected among the four supporting columns, adjustable supporting mechanisms are arranged on the lower surface of the sliding plate and the upper surface of the grinding table, and each adjustable supporting mechanism comprises a fixing frame, a positioning plate and an auxiliary ball; the fixing frames are symmetrically and fixedly connected to the lower surface of the sliding plate and the upper surface of the grinding table correspondingly, the opposite ends of every two vertically-adjacent fixing frames are rotationally connected with symmetrically-distributed positioning plates correspondingly, and the interiors of the positioning plates are rotationally connected with evenly-distributed auxiliary balls correspondingly. And meanwhile, conveying and autorotation of the ball screw are assisted through the auxiliary ball, the situation that the positioning plate of the fixed specification is abraded in the conveying process of the ball screw is avoided, and the grinding precision of the internal thread of the ball screw is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of ball screw processing, in particular to an internal thread grinding machine for ball screws. Background Technique

[0002] A ball screw is a shaft with a threaded raceway and is the most commonly used transmission element in machine tools and precision machinery. An internal thread grinding machine for ball screws is a machine tool that grinds the internal thread surface of a ball screw using a grinding tool. The working principle of the internal thread grinding machine for ball screws is to perform high-speed rotary grinding on the internal thread surface of the ball screw through grinding tools such as grinding wheels in the grinding device to achieve the required processing accuracy and surface quality. Some existing internal thread grinding machines for ball screws use a method of fixing the angle of the clamping positioning plate to clamp the ball screw. When clamping ball screws with different diameters, the fixed-angle clamping positioning plate will cause damage to the ball screw during the transmission process of the ball screw, which will cause certain damage to the grinding accuracy of the internal thread of the ball screw and the quality of the finished product of the ball screw itself, resulting in an increase in the processing error of the internal thread of the ball screw. Content of the Utility Model

[0003] The technical problem to be solved by the utility model is to overcome the existing defects and provide an internal thread grinding machine for ball screws, which can adjust the state of the clamping unit according to the diameter of the ball screw, and at the same time, assist the transmission and self-rotation of the ball screw through auxiliary balls, avoid the wear caused by the positioning plate with a fixed specification during the transmission process of the ball screw, improve the grinding accuracy of the internal thread of the ball screw, and can effectively solve the problems in the background technique.

[0004] To achieve the above purpose, the utility model provides the following technical solution: An internal thread grinding machine for ball screws, including a grinding table;

[0005] Grinding table: Four columns are fixedly connected to the upper end thereof, a sliding plate is slidably connected between the four columns, and adjustable support mechanisms are arranged on the lower surface of the sliding plate and the upper surface of the grinding table. The adjustable support mechanism includes a fixed frame, a positioning plate and an auxiliary ball. The fixed frames are symmetrically and fixedly connected to the lower surface of the sliding plate and the upper surface of the grinding table respectively. The opposite ends of two vertically adjacent fixed frames are rotatably connected with symmetrically distributed positioning plates, and uniformly distributed auxiliary balls are rotatably connected inside the positioning plates, which can adjust the state of the clamping unit according to the diameter of the ball screw, and at the same time, assist the transmission and self-rotation of the ball screw through the auxiliary balls, avoid the wear caused by the positioning plate with a fixed specification during the transmission process of the ball screw, and improve the grinding accuracy of the internal thread of the ball screw.

[0006] Further, the adjustable support mechanism further includes connecting seats, connecting rods, lead screws, drive seats and knobs. The lead screws are all rotatably connected to the inside of the fixing frame. One end of each lead screw away from the center of the grinding table is fixedly connected with a knob. The inside of the fixing frame is slidably connected with drive seats. The inside of each drive seat is threadedly connected to the middle of the vertically adjacent lead screw. Connecting rods are rotatably connected to the front and rear ends of each drive seat. One end of each positioning plate away from the fixing frame is fixedly connected with a connecting seat. One end of each connecting rod away from the drive seat is rotatably connected to the vertically adjacent connecting seat, providing driving force for the state adjustment of the positioning plate.

[0007] Further, a control switch group is arranged at the left end of the upper surface of the grinding table. The input end of the control switch group is electrically connected to an external power supply to control each electrical appliance.

[0008] Further, a mounting frame is fixedly connected to the middle of the upper surface of the grinding table. A first motor is arranged at the right end of the mounting frame. The left end of the output shaft of the first motor is fixedly connected with a grinding wheel. The input end of the first motor is electrically connected to the output end of the control switch group, providing driving force for the grinding of the internal thread of the ball screw.

[0009] Further, it further includes a top plate. The top plate is fixedly connected to the upper ends between the four support columns. An electric push rod is arranged at the upper end of the top plate. The telescopic end of the electric push rod is fixedly connected to the upper end of the sliding plate. The input end of the electric push rod is electrically connected to the output end of the control switch group to realize the positioning and clamping of the ball screw.

[0010] Further, brackets are fixedly connected to the left and right ends of the grinding table. Three rotating shafts are rotatably connected to the inside of each bracket. One end of the two lowermost rotating shafts facing away from each other is fixedly connected with a driving wheel. One end of the upper rotating shaft away from the center of the grinding table is fixedly connected with a driven wheel. Two longitudinally adjacent driven wheels are both driven by the same driving wheel through a transmission belt. A transmission wheel is fixedly connected to the middle of each upper rotating shaft. Second motors are arranged at the lower ends of the opposite inner surfaces of the brackets. The output shafts of the second motors are both fixedly connected to the horizontally adjacent rotating shafts. The input ends of the second motors are both electrically connected to the output end of the control switch group to realize the self-rotation of the ball screw and cooperate with the grinding wheel to realize the internal thread grinding of the ball screw.

[0011] Further, a collection bin is arranged at the lower end of the grinding table. Support legs are symmetrically distributed and fixedly connected to the lower end of the grinding table to collect waste chips and effectively ensure the smooth progress of the internal thread processing work of the ball screw.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows: This internal thread grinding machine for ball screws has the following advantages:

[0013] By moving the driving seat, the connecting rod is made to push the corresponding positioning plate for angle adjustment, so that the positioning plate is suitable for the clamping requirements of ball screws with different diameters, enabling the positioning and clamping unit of the internal thread grinding machine for ball screws to perfectly fit ball screws with different diameters. At the same time, the rotating auxiliary ball greatly reduces the damage to the ball screw during transmission and self-rotation, greatly reducing the grinding error of the internal thread of the ball screw and improving the grinding accuracy of the internal thread of the ball screw. Brief Description of the Drawings

[0014] Figure 1 is a schematic structural view of the present utility model;

[0015] Figure 2 is a schematic cross-sectional structural view inside the present utility model;

[0016] Figure 3 is an enlarged structural view of part A of the present utility model.

[0017] In the figure: 1 grinding table, 2 support column, 3 sliding plate, 4 top plate, 5 adjustable support mechanism, 51 fixed frame, 52 positioning plate, 53 auxiliary ball, 54 connecting seat, 55 connecting rod, 56 lead screw, 57 driving seat, 58 knob, 6 mounting frame, 7 grinding wheel, 8 motor I, 9 electric push rod, 10 support, 11 rotating shaft, 12 driving wheel, 13 driven wheel, 14 transmission wheel, 15 motor II, 16 collection bin, 17 control switch group. Detailed Embodiment

[0018] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0019] Please refer to Figures 1 - 3 , this embodiment provides a technical solution: an internal thread grinding machine for ball screws, including a grinding table 1;

[0020] Grinding table 1: Four support columns 2 are fixedly connected to its upper end. A sliding plate 3 is slidably connected between the four support columns 2. Adjustable support mechanisms 5 are arranged on both the lower surface of the sliding plate 3 and the upper surface of the grinding table 1. The adjustable support mechanism 5 includes a fixed frame 51, a positioning plate 52, and an auxiliary ball 53. The fixed frames 51 are symmetrically and fixedly connected to the lower surface of the sliding plate 3 and the upper surface of the grinding table 1 respectively. Symmetrically distributed positioning plates 52 are rotatably connected to the opposite ends of two vertically adjacent fixed frames 51. Uniformly distributed auxiliary balls 53 are rotatably connected inside the positioning plates 52. The adjustable support mechanism 5 further includes a connecting seat 54, a connecting rod 55, a lead screw 56, a driving seat 57, and a knob 58. The lead screws 56 are rotatably connected inside the fixed frames 56. Knobs 58 are fixedly connected to the ends of the lead screws 56 far from the center of the grinding table 1. Driving seats 57 are slidably connected inside the fixed frames 51. The middle parts of the lead screws 56 vertically adjacent to the driving seats 57 are threadedly connected to the inside of the driving seats 57. Connecting rods 55 are rotatably connected to the front and rear ends of the driving seats 57. Connecting seats 54 are fixedly connected to the ends of the positioning plates 52 far from the fixed frames 51. The ends of the connecting rods 55 far from the driving seats 57 are rotatably connected to the vertically adjacent connecting seats 54. A collection bin 16 is arranged at the lower end of the grinding table 1. Symmetrically distributed legs are fixedly connected to the lower end of the grinding table 1. Place the ball screw to be ground on the upper ends between the two adjustable support mechanisms 5 on the lower side. Then turn the knobs 58 in sequence. The rotation of the knobs 58 drives the rotation of the vertically adjacent lead screws 56. The rotation of the lead screws 56 causes the vertically adjacent driving seats 57 to move vertically. The vertical movement of the driving seats 57 drives the vertical movement of the two adjacent connecting rods 55. As a result, the ends of the connecting rods 55 close to the positioning plates 52 push the positioning plates 52 through the corresponding connecting seats 53, finally realizing the angle adjustment of the positioning plates 52. When the positioning plates 52 are adjusted to the required angles of the ball screw, stop turning the knobs 58. At the same time, the electric push rod 9 is operated by controlling the switch group 17. The telescopic end of the electric push rod 9 extends to push the sliding plate 3 downward. The sliding plate 3 moves downward under the guiding action of the support columns 2. The downward movement of the sliding plate 3 drives the two vertically adjacent adjustable support mechanisms 5 to move downward. The two vertically adjacent adjustable support mechanisms 5 cooperate to achieve stable positioning and clamping of the ball screw;

[0021] Among them: A control switch group 17 is arranged at the left end of the upper surface of the grinding table 1. The input end of the control switch group 17 is electrically connected to an external power supply;

[0022] Among them: An installation frame 6 is fixedly connected to the middle of the upper surface of the grinding table 1. A first motor 8 is arranged at the right end of the installation frame 6. The left end of the output shaft of the first motor 8 is fixedly connected to a grinding wheel 7. The input end of the first motor 8 is electrically connected to the output end of the control switch group 17;

[0023] Wherein: It further includes a top plate 4, the top plate 4 is fixedly connected to the upper ends between the four support columns 2, an electric push rod 9 is arranged at the upper end of the top plate 4, the telescopic end of the electric push rod 9 is fixedly connected to the upper end of the sliding plate 3, and the input end of the electric push rod 9 is electrically connected to the output end of the control switch group 17;

[0024] Wherein: Support brackets 10 are fixedly connected to both the left and right ends of the grinding table 1. Three rotating shafts 11 are rotatably connected inside the support brackets 10. Driving wheels 12 are fixedly connected to the opposite ends of the two lowermost rotating shafts 11. Driven wheels 13 are fixedly connected to the ends of the upper rotating shafts 11 away from the center of the grinding table 1. Two longitudinally adjacent driven wheels 13 are both connected by a transmission belt to the same driving wheel 12. Transmission wheels 14 are fixedly connected to the middle parts of the upper rotating shafts 11. Motors II 15 are arranged at the lower ends of the opposite inner surfaces of the support brackets 10. The output shafts of the motors II 15 are fixedly connected to the horizontally adjacent rotating shafts 11. The input ends of the motors II 15 are both electrically connected to the output end of the control switch group 17. By closing the electric push rod 9 through the control switch group 17 and enabling the motor I 8 to operate, the output shaft of the motor I 8 rotates to drive the grinding wheel 7 to rotate, and the rotation of the grinding wheel 7 realizes the grinding of the ball screw. At the same time, by enabling the motor II 15 to operate through the control switch group 17, the output shaft of the motor II 15 rotates to drive the horizontally adjacent rotating shafts 11 to rotate. The rotation of the lower rotating shafts 11 both drives the horizontally adjacent driving wheels 12 to rotate. The rotation of the driving wheels 12 drives the two driven wheels 13 to rotate through the transmission belt. The rotation of the driven wheels 13 both drives the horizontally adjacent rotating shafts 11 to rotate. The rotation of the two upper rotating shafts 11 both drives the horizontally adjacent transmission wheels 14 to rotate. The cooperation of two longitudinally adjacent transmission wheels 14 drives the ball screw to rotate. At the same time, the ball screw is pulled to move by an external driving mechanism, and the auxiliary ball 53 assists the movement of the ball screw, thereby realizing the grinding of the internal thread of the ball screw.

[0025] The working principle of the ball screw internal thread grinding machine provided by the utility model is as follows: when working, the personnel use the legs to stably place the grinding table 1 and the support 2 and other mechanisms in the horizontal working area. After the placement is stable, the personnel place the ball screw to be ground on the upper end between the two adjustable support mechanisms 5 on the lower side, and then the personnel turn the knob 58 in turn. The rotation of the knob 58 drives the vertically adjacent screw rod 56 to rotate, and the rotation of the screw rod 56 causes the vertically adjacent drive seat 57 to move vertically. The drive seat 57 The vertical movement drives the two adjacent connecting rods 55 to move vertically, so that one end of the connecting rod 55 close to the positioning plate 52 pushes the positioning plate 52 through the corresponding connecting seat 53, and finally realizes the angle adjustment of the positioning plate 52. When the positioning plates 52 are adjusted to the angle required by the ball screw, the knob 58 is stopped, and the operation of the electric push rod 9 is realized by controlling the switch group 17. The telescopic end of the electric push rod 9 extends and pushes the sliding plate 3 downward. The sliding plate 3 moves downward under the guidance of the pillar 2, and the downward movement of the sliding plate 3 drives the vertical phase The two adjacent adjustable support mechanisms 5 move down, and the vertically adjacent adjustable support mechanisms 5 work together to achieve stable positioning and clamping of the ball screw. After the ball screw is positioned and clamped stably, the personnel close the electric push rod 9 through the control switch group 17 and realize the operation of the motor 1 8. The output shaft of the motor 1 8 rotates to drive the grinding wheel 7 to rotate. The grinding wheel 7 rotates to grind the ball screw. At the same time, the motor 2 15 is operated by controlling the switch group 17. The output shaft of the motor 2 15 rotates to drive the horizontally adjacent rotating shaft 11 to rotate. The rotation of the rotating shaft 11 at the end drives the rotation of the laterally adjacent driving wheel 12, and the rotation of the driving wheel 12 drives the two driven wheels 13 to rotate through the transmission belt. The rotation of the driven wheel 13 drives the rotation of the laterally adjacent rotating shaft 11. The rotation of the two rotating shafts 11 on the upper side drives the rotation of the laterally adjacent transmission wheels 14. The two longitudinally adjacent transmission wheels 14 work together to drive the ball screw to rotate. At the same time, the ball screw is pulled to move through an external driving mechanism. The auxiliary ball 53 assists the movement of the ball screw, thereby realizing the grinding of the internal thread of the ball screw.

[0026] It is worth noting that the control switch group 17 disclosed in the above embodiment is provided with control buttons corresponding to the motor 1 8 , the electric push rod 9 and the motor 2 15 one by one and controlling the switches thereof.

[0027] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. Ball screw internal thread grinding machine, characterized by: It comprises a grinding table (1); A grinding table (1): four pillars (2) are fixedly connected to its upper end, a sliding plate (3) is slidably connected between the four pillars (2), an adjustable support mechanism (5) is provided on the lower surface of the sliding plate (3) and the upper surface of the grinding table (1), the adjustable support mechanism (5) comprises a fixed frame (51), a positioning plate (52) and an auxiliary ball (53), the fixed frame (51) is symmetrically fixedly connected to the lower surface of the sliding plate (3) and the upper surface of the grinding table (1), respectively, the opposite ends of two vertically adjacent fixed frames (51) are rotatably connected to symmetrically distributed positioning plates (52), and the interior of the positioning plates (52) is rotatably connected to evenly distributed auxiliary balls (53).

2. The ball screw internal thread grinding machine according to claim 1, characterized in that: The adjustable support mechanism (5) further comprises a connecting seat (54), a connecting rod (55), a screw rod (56), a driving seat (57) and a knob (58); the screw rod (56) is rotatably connected to the interior of the fixed frame (51); one end of the screw rod (56) away from the center of the grinding table (1) is fixedly connected to the knob (58); the interior of the fixed frame (51) is slidably connected to the driving seat (57); the interior of the driving seat (57) is threadedly connected to the middle part of the vertically adjacent screw rod (56); the front and rear ends of the driving seat (57) are rotatably connected to the connecting rod (55); one end of the positioning plate (52) away from the fixed frame (51) is fixedly connected to the connecting seat (54); one end of the connecting rod (55) away from the driving seat (57) is rotatably connected to the connecting seat (54) adjacent to the vertical.

3. The ball screw internal thread grinding machine according to claim 1, characterized in that: A control switch group (17) is provided at the left end of the upper surface of the grinding table (1), and an input end of the control switch group (17) is electrically connected to an external power supply.

4. The ball screw internal thread grinding machine according to claim 3, characterized in that: A mounting frame (6) is fixedly connected to the middle of the upper surface of the grinding table (1), a motor (8) is arranged at the right end of the mounting frame (6), a grinding wheel (7) is fixedly connected to the left end of the output shaft of the motor (8), and the input end of the motor (8) is electrically connected to the output end of the control switch group (17).

5. The ball screw internal thread grinding machine according to claim 3, characterized in that: It also includes a top plate (4), which is fixedly connected to the upper ends between the four pillars (2), and an electric push rod (9) is provided at the upper end of the top plate (4), the telescopic end of the electric push rod (9) is fixedly connected to the upper end of the sliding plate (3), and the input end of the electric push rod (9) is electrically connected to the output end of the control switch group (17).

6. The ball screw internal thread grinding machine according to claim 3, characterized in that: The left and right ends of the grinding table (1) are fixedly connected to a bracket (10), and three rotating shafts (11) are rotatably connected inside the bracket (10). The ends of the two rotating shafts (11) at the bottom that are away from each other are fixedly connected to a driving wheel (12). The end of the rotating shaft (11) at the top that is away from the center of the grinding table (1) is fixedly connected to a driven wheel (13). The two driven wheels (13) adjacent to each other in the longitudinal direction are connected to the same driving wheel (12) through a transmission belt. The middle part of the rotating shaft (11) at the top is fixedly connected to a transmission wheel (14). The lower end of the bracket (10) opposite to the inner surface is provided with a second motor (15). The output shaft of the second motor (15) is fixedly connected to the rotating shaft (11) adjacent to each other in the transverse direction. The input end of the second motor (15) is electrically connected to the output end of the control switch group (17).

7. The ball screw internal thread grinding machine according to claim 1, characterized in that: The lower end of the grinding table (1) is provided with a collecting bin (16), and the lower end of the grinding table (1) is fixedly connected with symmetrically distributed supporting legs.

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