Accurate grinding device of spiral trajectory refiner for ball screw

Abstract

The utility model relates to an accurate grinding device of a spiral trajectory accurate grinding machine of a ball screw, and belongs to the technical field of grinding equipment of ball screws of automobile steering devices. The accurate grinding device of the spiral trajectory accurate grinding machine for the ball screw comprises a machine base, a grinding assembly and a positioning assembly. A main sliding plate is arranged on the machine base through a sliding rail and a main lead screw motor. An auxiliary sliding plate is arranged on the main sliding plate through a guide rail and an auxiliary screw rod; the auxiliary sliding plate is provided with an automatic chuck through a rotating motor; a sliding seat is arranged on the main sliding plate on one side of the auxiliary sliding plate through a sliding rail; a rotating center is arranged on the sliding seat; a pressure sensor is mounted on one side of the rotating tip through a bracket; one end of the rotating tip is in contact connection with the pressure sensor. The accurate grinding device is compact in structure, ingenious in design and particularly suitable for the requirement for accurate grinding of the double-helix trajectory of the ball screw of the automobile steering device.

Description

Technical Field

[0001] The utility model relates to a fine grinding device of a spiral ballistic fine grinding machine for a ball screw, and belongs to the technical field of grinding equipment for a ball screw of an automobile steering gear. Background Art

[0002] In the field of automobile steering gear ball screw production technology, after production, it is necessary to use an oil stone to grind the double spiral trajectory of the ball screw. The existing ball screw grinding device, such as the device for fine grinding of the screw published in the invention patent application with application publication number CN104589161A, can meet the needs of grinding to a certain extent, but the oil stone is in a relatively fixed state during operation. It can complete the grinding work of the bottom of the spiral trajectory, but its grinding effect on the inner side of the spiral trajectory is relatively poor, and there is a problem of low grinding accuracy. Therefore, it is necessary to develop a new fine grinding device to solve the above problems existing in the existing ball screw grinding method. Summary of the invention

[0003] The utility model aims to provide a fine grinding device of a spiral ballistic fine grinder for a ball screw which has a compact structure and an ingenious design so as to solve the problem of low grinding precision in the existing ball screw grinding method.

[0004] The technical solution of the utility model is:

[0005] A fine grinding device of a spiral ballistic fine grinding machine for a ball screw comprises a machine base, a grinding assembly and a positioning assembly; it is characterized in that: a main slide is installed on the machine base through a slide rail and a main screw motor; a sub-slide is installed on the main slide through a guide rail and a sub-screw; an automatic chuck is installed on the sub-slide through a rotating motor; a slide seat is installed on the main slide on one side of the sub-slide through a slide rail; a rotating top is installed on the slide seat; a pressure sensor is installed on one side of the rotating top through a bracket; one end of the rotating top is in contact with the pressure sensor; a grinding assembly is installed above the rotating top; and a positioning assembly is provided on one side of the grinding assembly.

[0006] The positioning assembly includes a positioning slide, a displacement sensor, an inductive slider and a buffer spring; the positioning slide is installed on the machine base through a push cylinder; a transmission rod is installed on the positioning slide through a bearing seat; a displacement sensor is installed on the positioning slide at one end of the transmission rod; the displacement sensor is in contact with the transmission rod; a sensing slider is installed on the positioning slide at the other end of the transmission rod through a slide rail; an inductive threaded port is provided at one end of the sensing slider; the other end of the sensing slider is fixedly connected to the transmission rod; a buffer spring is sleeved on the transmission rod between the sensing slider and the bearing seat.

[0007] The grinding assembly includes a mounting support, an oscillating grinder, a conical lifting plate and a vertical screw; a conical slide is slidably mounted on the machine base through the mounting support and the guide rail; the conical slide is connected to the vertical screw mounted on the mounting support through a motor; and the oscillating grinder is symmetrically mounted on the conical slide.

[0008] The swing grinder comprises a change seat, a swing cylinder, a swing seat, a slide cylinder and an oil stone; the cone-shaped slide plate is provided with a swing cylinder through the change seat; the bottom end of the swing cylinder is provided with a swing seat; the swing seat is provided with an assembly plate through the slide cylinder; the bottom end of the assembly plate is provided with an oil stone obliquely.

[0009] One end of the oilstone is provided with a grinding arc.

[0010] The advantages of the utility model are:

[0011] The fine grinding device of the spiral trajectory fine grinding machine of the ball screw has a compact structure and ingenious design. Its oil stone can fine grind the double spiral trajectory during the swinging process, thereby solving the problem of relatively poor grinding effect and low grinding accuracy when the oil stone is in a relatively fixed state to complete the spiral trajectory grinding work. The invention is particularly suitable for the needs of double spiral trajectory fine grinding of automobile steering gear ball screws. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the axonometric structure of the utility model;

[0013] Figure 2 This is a schematic diagram of the axonometric structure of the utility model;

[0014] Figure 3 for Figure 1 A schematic diagram of a top view structure;

[0015] Figure 4 It is a structural schematic diagram of the main slide plate and its components of the utility model;

[0016] Figure 5 It is a schematic diagram of the cross-sectional structure of the rotating top of the utility model;

[0017] Figure 6 It is a structural schematic diagram of the positioning component of the utility model;

[0018] Figure 7 for Figure 6 A schematic diagram of the enlarged structure at A in the middle;

[0019] Figure 8 It is a structural schematic diagram of the grinding assembly of the utility model;

[0020] Fig. 9 for Figure 8 A schematic diagram of the cross-sectional structure of;

[0021] Fig.10 It is a structural schematic diagram of the oscillating grinder of the utility model;

[0022] Fig.11 It is a structural schematic diagram of the oscillating grinder of the utility model;

[0023] Fig.12 for Fig.11 Schematic diagram of the cross-sectional structure along the BB direction.

[0024] In the figure: 1. Machine base; 2. Main screw motor; 3. Main slide plate; 4. Sub-screw; 5. Sub-slide plate; 6. Rotary motor; 7. Automatic chuck; 8. Slide seat; 9. Rotating top; 10. Bracket; 11. Pressure sensor; 12. Grinding assembly; 13. Positioning assembly; 14. Positioning slide; 15. Bearing seat; 16. Transmission rod; 17. Displacement sensor; 18. Inductive slider; 19. Inductive threaded port; 20. Buffer spring; 21. Conical slide plate; 22. Mounting support; 23. Vertical screw; 24. Swinging grinder; 25. Changing seat; 26. Swinging cylinder; 27. Swinging seat; 28. Slide cylinder; 29. ​​Assembly plate; 30. Oilstone; 31. Grinding arc. DETAILED DESCRIPTION

[0025] The fine grinding device of the spiral ballistic fine grinding machine of the ball screw comprises a machine base 1, a grinding component 12 and a positioning component 13 (see the attached manual Figure 1 , 2 and 3).

[0026] The main slide plate 3 is installed on the machine base 1 through the slide rail and the main screw motor 2 (see the appendix of the manual). Figure 1 and 2 ); When the main screw motor 2 is working, it can drive the main slide plate 3 to slide back and forth on the machine base 1 with the cooperation of the main screw.

[0027] The main slide 3 is provided with a secondary slide 5 through a guide rail and a secondary screw rod 4; the secondary slide 5 is provided with an automatic chuck 7 (see the attached manual) through a rotating motor 6. Figure 4 ). When working, the auxiliary screw rod 4 can push the auxiliary slide plate 5 to slide back and forth on the main slide plate 3.

[0028] A slide seat 8 is mounted on the main slide 3 on one side of the auxiliary slide 5 through a slide rail; a rotating top 9 is mounted on the slide seat 8 (see the attached manual). Figure 4 ). When the slide 8 is subjected to force, it will drive the top 10 to move on the main slide 3.

[0029] A pressure sensor 11 is mounted on one side of the rotating top 9 through a bracket 10; one end of the rotating top 9 is in contact with the pressure sensor 11 (see the attached manual). Figure 5). When the rotating top 9 is subjected to force, it will drive the slide 8 to slide and squeeze the pressure sensor 11, so that the force condition of the rotating top 9 can be monitored through the pressure sensor 11.

[0030] A grinding assembly 12 is mounted above the rotating top 9 (see the attached manual). Figure 1 , 2 and 3). The grinding assembly 12 includes a mounting support 22, an oscillating grinder 24, a conical slide plate 21 and a vertical screw rod 23 (see the attached manual). Figure 8 and 9 The machine base 1 is provided with a conical slide plate 21 through a mounting support 22 and a guide rail for sliding; the conical slide plate 21 is connected to a vertical screw rod 23 mounted on the mounting support 22 through a motor (see the attached manual). Figure 8 and 9 ). When the vertical screw rod 23 is working, it can push the conical slide plate 21 to slide up and down along the base 1.

[0031] The cone-shaped slide plate 21 is symmetrically provided with an oscillating grinder 24 (see the attached manual). Figure 8 , 9 and 10). The oscillating sander 24 includes a change-over seat 25, an oscillating cylinder 26, an oscillating seat 27, a slide cylinder 28 and an oilstone 30 (see the attached manual). Fig.10 , 11 and 12).

[0032] The cone slide plate 21 is provided with a swing cylinder 26 through a change seat 25; the bottom end of the swing cylinder 26 is provided with a swing seat 27 (see the attached manual). Fig.11 and 12 When the swing cylinder 26 is working, it can drive the swing seat 27 to swing back and forth within a certain range.

[0033] The swing seat 27 is provided with a mounting plate 29 via a slide cylinder 28; an oil stone 30 is obliquely mounted at the bottom of the mounting plate 29 (see the attached manual). Fig.10 ). During operation, the slide cylinder 28 can control the oilstone 30 to contact and connect with the spiral trajectory of the workpiece ball screw with a certain pressure under the control of the pressure regulating valve.

[0034] One end of the oilstone 30 is provided with a grinding arc 31 (see the attached manual). Fig.10 and 11 ). The radian of the grinding arc 31 is consistent with the radian of the spiral trajectory of the ball screw, and the grinding arc 31 and the spiral trajectory of the ball screw can be closely connected during operation.

[0035] A positioning assembly 13 is provided on one side of the grinding assembly 12 (see the attached manual). Figure 1 , 2and 3). The positioning assembly 13 includes a positioning slide 14, a displacement sensor 17, a sensing slide 18 and a buffer spring 20 (see the attached manual). Figure 6 and 7 ).

[0036] A positioning slide 14 is mounted on the machine base 1 through a push cylinder; a transmission rod 16 is mounted on the positioning slide 14 through a bearing seat 15; a displacement sensor 17 is mounted on the positioning slide 14 at one end of the transmission rod 16; the displacement sensor 17 is in contact with the transmission rod 16; a sensing slider 18 is mounted on the positioning slide 14 at the other end of the transmission rod 16 through a slide rail; a sensing threaded opening 19 is provided at one end of the sensing slider 18; the other end of the sensing slider 18 is fixedly connected to the transmission rod 16; a buffer spring 20 is sleeved on the transmission rod 16 between the sensing slider 18 and the bearing seat 15 (see the attached manual) Figure 6 and 7 ).

[0037] The fine grinding device of the spiral ballistic fine grinding machine of the ball screw first places the workpiece to be processed between the automatic chuck 7 and the rotating top 9 when working. Then the auxiliary screw 4 drives the auxiliary slide 5 to move toward the workpiece. When the auxiliary slide 5 drives the automatic chuck 7 to clamp and fix one end of the workpiece, the auxiliary slide 5 continues to move so that the automatic chuck 7 drives the workpiece to move so that the other end of the workpiece contacts and connects with the rotating top 9.

[0038] After the above work is completed, the positioning slide 14 on the positioning assembly 13 drives the sensing slide 18 to move toward the workpiece and make it contact with the surface of the workpiece. At this time, the sensing slide 18 will overcome the elastic force of the buffer spring 20 after being stressed and move backward for a distance.

[0039] After the sensing slide block 18 contacts the surface of the workpiece, the rotating motor 6 drives the workpiece to rotate through the automatic chuck 7 in cooperation with the rotating top 9. In this process, the main screw motor 2 drives the main slide block 3 in cooperation with the main screw to drive the workpiece to slide to the left. In this process, when the sensing slide block 18 contacts the double helix trajectory on the workpiece, the sensing slide block 18 moves forward under the action of the elastic force of the buffer spring 20, and the sensing thread opening 19 will contact the double helix trajectory. In this way, the positioning component 13 can sense the position of the end of the double helix trajectory of the workpiece through the change of the displacement sensor 17. That is, the contact position between the end of the double helix trajectory and the sensing thread opening 19 of the sensing slide block 18 is the zero point position.

[0040] After the positioning assembly 13 finds the zero position, it resets. At this time, the vertical screw 23 of the grinding assembly 12 pushes the conical slide plate 21 to slide down. When the oil stone 30 corresponds to the end of the double spiral trajectory of the workpiece, the slide cylinder 28 can control the oil stone 30 to contact the spiral trajectory of the workpiece ball screw with a certain pressure under the control of the pressure regulating air valve. Then the swing cylinder 26 drives the oil stone 30 to swing left and right in the spiral trajectory through the swing seat 27.

[0041] After the above process is completed, the main slide 3 drives the workpiece to slide to the left, and at the same time, the automatic chuck 7 drives the workpiece to rotate with the cooperation of the rotating top 9. In this way, the workpiece can move to the left during the self-rotation process, and the oilstone 30 swings left and right in the spiral trajectory to complete the fine grinding of the double spiral trajectory.

[0042] When the workpiece moves to the left to the limit position and the oil stone 30 completes the double helical ballistic fine grinding, the workpiece stops rotating, the grinding assembly 12 is reset, and the main slide 3 is reset. Then the automatic chuck 7 drives the workpiece to move to the left and disengages from the rotating top 9. Then the workpiece is removed. At this point, the fine grinding device of the spiral ballistic fine grinding machine of the ball screw has completed the workpiece grinding, and the fine grinding device can enter the next working cycle.

[0043] The fine grinding device of the spiral ballistic fine grinding machine of the ball screw has a compact structure and ingenious design. Its oil stone 30 can fine grind the double spiral trajectory during the swinging process, thereby solving the problem of relatively poor grinding effect and low grinding accuracy when the oil stone 30 is in a relatively fixed state to complete the spiral trajectory grinding work. The invention is particularly suitable for the needs of double spiral trajectory fine grinding of automobile steering gear ball screws.

Claims

1. A fine grinding device for a spiral ballistic fine grinding machine of a ball screw, comprising a machine base (1), a grinding assembly (12) and a positioning assembly (13); characterized in that: The machine base (1) is provided with a main slide (3) via a slide rail and a main screw motor (2); the main slide (3) is provided with a secondary slide (5) via a guide rail and a secondary screw (4); the secondary slide (5) is provided with an automatic chuck (7) via a rotating motor (6); a slide seat (8) is provided on the main slide (3) on one side of the secondary slide (5) via a slide rail; a rotating top (9) is provided on the slide seat (8); a pressure sensor (11) is provided on one side of the rotating top (9) via a bracket (10); one end of the rotating top (9) is in contact with the pressure sensor (11); a grinding assembly (12) is provided above the rotating top (9); a positioning assembly (13) is provided on one side of the grinding assembly (12).

2. The fine grinding device of the spiral ballistic fine grinding machine for a ball screw according to claim 1, characterized in that: The positioning assembly (13) includes a positioning slide (14), a displacement sensor (17), a sensing slider (18) and a buffer spring (20); the positioning slide (14) is installed on the machine base (1) through a push cylinder; the positioning slide (14) is installed on the transmission rod (16) through a bearing seat (15); the positioning slide (14) at one end of the transmission rod (16) is installed with a displacement sensor (17); the displacement sensor (17) and the transmission rod (16) are in abutment connection; the sensing slider (18) is installed on the positioning slide (14) at the other end of the transmission rod (16) through a slide rail; one end of the sensing slider (18) is provided with a sensing threaded opening (19); the other end of the sensing slider (18) is fixedly connected to the transmission rod (16); and a buffer spring (20) is sleeved on the transmission rod (16) between the sensing slider (18) and the bearing seat (15).

3. The fine grinding device of the spiral ballistic fine grinding machine for a ball screw according to claim 1, characterized in that: The grinding assembly (12) includes a mounting support (22), an oscillating grinder (24), a conical lifting plate and a vertical screw (23); a conical slide (21) is slidably mounted on the machine base (1) through the mounting support (22) and the guide rail; the conical slide (21) is connected to the vertical screw (23) mounted on the mounting support (22) through a motor; and the oscillating grinder (24) is symmetrically mounted on the conical slide (21).

4. The fine grinding device of the spiral ballistic fine grinding machine for a ball screw according to claim 3, characterized in that: The oscillating sander (24) comprises a change seat (25), a oscillating cylinder (26), a oscillating seat (27), a slide cylinder (28) and an oil stone (30); the oscillating cylinder (26) is mounted on the conical slide (21) via the change seat (25); the bottom end of the oscillating cylinder (26) is mounted with a oscillating seat (27); the oscillating seat (27) is mounted with an assembly plate (29) via the slide cylinder (28); and the bottom end of the assembly plate (29) is obliquely mounted with an oil stone (30).

5. The fine grinding device of the spiral ballistic fine grinding machine for a ball screw according to claim 4, characterized in that: One end of the oilstone (30) is provided with a grinding arc (31).

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