Tailstock slide mechanism and gear grinding machine and gear hobbing machine

Abstract

The application discloses a tailstock slide plate mechanism for gear grinding machines, gear hobbing machines and other machine tools, which comprises a vertical slide plate seat, the upper part of the slide plate seat is connected with a screw nut mechanism, characterized in that a vertical through hole A is arranged in the center of the slide plate seat, a vertical rod is arranged in the vertical through hole, the upper end of the vertical rod extends out of the vertical through hole and is connected with the screw nut mechanism, a spring A is sleeved on the outer wall of the middle part of the vertical rod, the top end of the spring A is fixed and the bottom end is provided with an adjustable compression assembly A, a through hole B with an upward opening is arranged on the slide plate seat on both sides of the upper part of the vertical through hole, a spring B is arranged in the through hole B, the bottom end of the spring B abuts against the bottom surface of the through hole B and the top end is provided with an adjustable compression assembly B. The tailstock slide plate mechanism of the application saves auxiliary time and improves reliability.

Description

TECHNICAL FIELD

[0001] The present application relates to a machine tool, in particular to a tailstock slide mechanism of a gear grinding machine, gear hobbing machine and the like. BACKGROUND

[0002] The slide structure used on the tailstock of the rear column of a gear grinding machine, gear hobbing machine and the like. The tailstock slide is generally driven by a servo motor through a ball screw. When the machine tool is cutting, the tailstock slide moves downward to the position and tightly presses the workpiece, so that the workpiece can be reliably machined under sufficient clamping force, and then retracts after the cutting is completed.

[0003] The conventional tailstock slide does not have a spring structure inside, but only has a proximity switch on the outside to determine whether it is in place. Thus, when the tailstock moves to press the workpiece, it is a hard contact, and the pressing force cannot be adjusted and controlled. For some slender shaft workpieces and thin disc workpieces, the workpieces are easily deformed. The switch may also not be adjusted to the position, causing the gland or center on the tailstock slide to not fully contact the workpiece, so that the clamping force of the workpiece is not enough, resulting in damage to the workpiece and the tool. SUMMARY

[0004] Therefore, the first object of the present application is to provide a tailstock slide mechanism capable of adjusting the clamping force.

[0005] The object of the present application is achieved by the following technical scheme: a tailstock slide mechanism, comprising a vertical slide seat, the upper part of the slide seat being connected with a screw nut mechanism, characterized in that: a vertical through hole A is arranged in the center of the slide seat, a vertical rod is arranged in the vertical through hole A, the upper end of the vertical rod extends out of the vertical through hole A and is connected with the screw nut mechanism, a spring A is sleeved on the outer wall of the middle part of the vertical rod, the top end of the spring A is fixed and the bottom end is provided with an adjustable compression assembly A, a through hole B opening upward is arranged on the slide seat on both sides of the upper part of the vertical through hole A, a spring B is arranged in the through hole B, the bottom end of the spring B abuts against the bottom surface of the through hole B and the top end is provided with an adjustable compression assembly B.

[0006] Further, a cover plate is arranged on the top surface of the slide seat, a vertical rod through hole is arranged on the cover plate, a first proximity switch is arranged on the cover plate, a connecting plate is arranged on the upper end of the vertical rod and outside the vertical through hole A, and a second proximity switch is arranged on the connecting plate.

[0007] Further, a first baffle is arranged in the upper part of the vertical through hole A, and the top end of the spring A abuts against the bottom surface of the first baffle.

[0008] Further, the first step is arranged in the lower part of the vertical through hole A, the second baffle is arranged at the first step, the middle part of the second baffle is fixedly connected with the vertical rod, screw holes A are arranged at the two sides of the second baffle, adjusting screws A are arranged in the screw holes A and upwardly extend into the third movable baffle at the bottom end of the spring A.

[0009] Further, the second step is arranged in the upper part of the vertical through hole A, the through holes B are arranged at the two sides of the second step, the fourth baffle is arranged in the upper part of the through hole B, the through holes are arranged at the two sides of the fourth baffle, the fourth baffle is fixedly connected with the slide plate base through the screw B, screw holes B are arranged at the two sides of the fourth baffle and opposite to the through holes B, adjusting screws B are arranged in the screw holes B, and flanges are arranged on the screw rods of the adjusting screws and abut against the top end of the spring B.

[0010] Further, the self-lubricating bearing is arranged in the through hole of the fourth baffle, and the guide sleeve is arranged in the self-lubricating bearing, and the screw B is screwed with the slide plate base through the guide sleeve.

[0011] Further, the vertical rod is a three-section type, including an upper section arranged outside the vertical through hole A, a middle section arranged in the vertical through hole A and a lower section, the spring A is arranged on the outer wall of the middle section, and the upper section and the middle section are hollow rods.

[0012] Further, the upper section of the vertical rod is a nut seat connected with the nut of the screw rod and nut mechanism.

[0013] Further, the top end is connected with the bottom surface of the slide plate base.

[0014] The second object of the application is to provide a gear grinding machine comprising the tailstock slide plate mechanism.

[0015] The third object of the application is to provide a gear hobbing machine comprising the tailstock slide plate mechanism.

[0016] Beneficial effects:

[0017] In the tailstock slide plate mechanism, the spring A and the spring B and the two proximity switches are mainly designed, the compression amount of the two groups of springs and the position of the proximity switches can be adjusted, the clamping force during machining of different workpieces can be set, the signal of the switch can be used to change into slow movement when contacting the workpiece and change into fast movement after leaving the workpiece, the auxiliary time is saved, and the reliability is improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] The brief description of drawings of the application is as follows.

[0019] Figure 1 It is a top view of the tailstock slide plate mechanism in embodiment 1.

[0020] Figure 2 for Figure 1 AA section view;

[0021] Figure 3 for Figure 1 A partial enlarged view of the BB section;

[0022] Figure 4 for Figure 2 A partial enlarged view of I. DETAILED DESCRIPTION

[0023] The embodiments of the present application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present application and are not to be construed as limiting the present application. On the contrary, the embodiments of the present application include all variations, modifications, and equivalents that fall within the spirit and scope of the appended claims.

[0024] Example 1: Figures 1-4 As shown, this embodiment provides a tailstock slide mechanism, including a vertical slide seat 1, the upper part of the slide seat is connected to the screw nut mechanism, a vertical through hole A3 is provided in the center of the slide seat, a vertical rod 4 is provided in the vertical through hole, the upper end of the vertical rod extends out of the vertical through hole and is connected to the screw nut mechanism, a spring A5 is provided on the outer wall of the middle part of the vertical rod, the top of the spring A is fixed and the bottom end is provided with an adjustable compression component A, and upward through holes B are respectively provided on the slide seats on both sides of the upper part of the vertical through hole, a spring B7 is provided in the through hole B, the bottom end of the spring B is abutted against the bottom surface of the through hole B and the top end is provided with an adjustable compression component B.

[0025] A first baffle 6 is provided at the upper portion of the vertical through hole A. The first baffle is fixedly connected to the hole wall of the vertical through hole A, and the top of the spring A abuts against the bottom surface of the first baffle. A third movable baffle 24 is provided at the middle portion of the vertical through hole A. The third movable baffle can move axially in the vertical through hole A, and the bottom end of the spring A abuts against the third movable baffle. A first step 8 is provided at the lower portion of the vertical through hole A. A second baffle 9 is provided at the first step. The middle portion of the second baffle is fixedly connected to the vertical rod by a screw 25. Screw holes A are provided on both sides of the second baffle. An adjusting screw A10 is provided in the screw hole A. The adjusting screw A extends upward into the through hole provided on the slide seat and abuts against the third movable baffle at the bottom end of the spring A. The top surface of the second baffle can abut against the surface of the first step.

[0026] The upper part of the vertical through hole A is provided with a second step 11, the both sides of the second step are provided with the through hole B, the upper part of the through hole B is provided with a fourth baffle 12, the both sides of the fourth baffle are respectively provided with a through hole, and the fourth baffle is connected with the second step surface of the slide plate base through the screw B13. The both sides of the fourth baffle are further provided with a screw hole B opposite to the through hole B, the screw hole B is provided with an adjusting screw B14, and the screw rod of the adjusting screw is provided with a flange table abutting against the top end of the spring B. In the embodiment, the through hole of the fourth baffle is provided with a self-lubricating bearing 15, the inside of the self-lubricating bearing is provided with a guide sleeve 17, and the screw B passes through the guide sleeve and is screwed with the second step surface of the slide plate base. In the embodiment, the fourth baffle is fixedly connected with the vertical rod.

[0027] As another embodiment in the embodiment, the top surface of the slide plate base is provided with a cover plate 2, the cover plate 2 is provided with a vertical rod through hole, the cover plate is provided with a first proximity switch 19, the upper end of the vertical rod and the part outside the vertical through hole A are provided with a connecting plate 22, and the connecting plate is provided with a second proximity switch 20.

[0028] As another embodiment in the embodiment, the vertical rod is a three-section type, including an upper section 41 outside the vertical through hole A, a middle section 42 inside the vertical through hole A and a lower section 43, and the spring A is arranged on the outer wall of the middle section. The upper section and the middle section are hollow rods, the upper section is a nut seat connected with the nut of the screw rod nut mechanism, the upper section is provided with a lower flange, the middle section is provided with an upper flange, and the lower flange and the upper flange are fixedly connected. The bottom surface of the upper flange of the middle section abuts against the top surface of the fourth baffle, and the outer diameters of the upper section and the middle section are consistent. The lower section is a solid rod connected with the hollow rod of the middle section and having an outer diameter smaller than that of the hollow rod of the middle section, the inner diameter D of the part of the vertical through hole A matched with the middle section is greater than the inner diameter d of the part matched with the lower section, the vertical rod can slide up and down in the vertical through hole A, and the sliding stroke is the distance L between the second step and the fourth baffle. The bottom surface of the slide plate base is connected with a center.

[0029] The embodiment further provides a gear grinding machine comprising the tailstock slide plate mechanism.

[0030] The embodiment further provides a gear hobbing machine comprising the tailstock slide plate mechanism.

[0031] The hobbing machine or gear grinding machine of the embodiment is used to fix the tailstock slide plate mechanism on the column of the hobbing machine or gear grinding machine, the column is provided with a guide rail, the slide plate seat 1 is provided with a sliding block 23, the sliding block is matched with the guide rail on the column to realize up and down sliding. The column is further provided with a screw nut mechanism, the nut of the screw nut mechanism is fixedly connected with the upper end of the vertical rod of the tailstock slide plate seat in the embodiment. The screw rod of the screw nut mechanism is rotated under the action of a driving device, and the nut drives the tailstock slide plate mechanism to slide downward or upward. The tailstock slide plate mechanism is fixedly provided with a center on the bottom surface, and the tailstock slide plate mechanism is driven by the screw nut mechanism to move downward and realize pre-tightening of the workpiece.

[0032] When the center is fixed on the slide plate seat and does not contact the workpiece, the entire tailstock slide plate mechanism is in a balanced state, the upward force of the spring A is equal to the downward force of the two springs B plus the gravity of the slide plate seat. The screw nut drives the entire tailstock slide plate mechanism to move downward, and when the center contacts the workpiece, the slide plate seat stops moving, but the screw rod continues to drive a small distance downward to the final position (which can be pre-adjusted). During this process, the second baffle 9 and the fourth baffle 12 continue to move downward, the spring A relaxes, the force decreases, the two springs B compress, and the force increases, that is, the downward pressing force gradually increases. In the balanced state, the switch 19 is triggered, and the slide plate seat can move quickly. When the switch 19 is disconnected, the slide plate seat begins to slow down and slowly move downward, and when the switch 20 is triggered, that is, the pre-set position is reached, the pressing force at this time is the required pressing force which can be adjusted through the switch position and the spring compression amount. When relaxed, the second baffle 9 and the fourth baffle 12 move upward with the screw nut seat first, the force of the two groups of springs changes to reach the previous balanced state, the switch 19 triggers a signal, and the entire tailstock slide plate mechanism quickly moves upward.

[0033] The tailstock slide plate mechanism in the embodiment mainly designs the spring A, the spring B and two proximity switches. By adjusting the compression amount of the two groups of springs and the position of the proximity switch, the clamping force when machining different workpieces can be set. The traditional tailstock slide plate mechanism does not set the spring structure, and the center directly hard contacts the workpiece, which is easy to damage the workpiece. The tailstock slide plate mechanism of the embodiment can form an effective buffering effect through the spring structure, and can gradually reach the required clamping force (by adjusting the compression amount of the two groups of springs) by moving a small distance (by adjusting the position of the proximity switch) after the center contacts the workpiece. At the same time, the sliding speed of the slide plate seat can be adjusted through the signal of the switch, which not only saves auxiliary time, but also improves reliability.

[0034] Finally, it is to be understood that the above-described embodiments are merely exemplary of the application and that a myriad of modifications, both as to the details of structure and the product that is produced by the process, as to the overall method of operation and the combination of parts and elements are intended to be encompassed by the application.

Claims

1. A tailstock slide mechanism comprising a vertical slide block, the upper part of the slide block being connected to a screw nut mechanism, characterized in that: The vertical through hole A is provided with a vertical rod, the upper end of the vertical rod extends out of the vertical through hole and is connected with the screw nut mechanism, the outer wall of the middle part of the vertical rod is sleeved with a spring A, the top end of the spring A is fixed and the bottom end is provided with an adjustable compression assembly A, the vertical through hole is provided with a through hole B on both sides of the upper part of the vertical through hole, the through hole B is provided with a spring B, the bottom end of the spring B abuts against the bottom surface of the through hole B and the top end is provided with an adjustable compression assembly B. The first step is arranged at the lower part of the vertical through hole A, the second baffle is arranged at the first step, the middle part of the second baffle is fixedly connected with the vertical rod, screw holes A are arranged on both sides of the second baffle, adjusting screws A are arranged in the screw holes A and extend upwards and abut against the third movable baffle at the bottom end of the spring A. The second step is arranged at the upper part of the vertical through hole A, the through hole B is arranged on both sides of the second step, a fourth baffle is arranged on the upper part of the through hole B, through holes are arranged on both sides of the fourth baffle, the fourth baffle is fixedly connected with the slide plate base through the screw B, screw holes B are arranged on both sides of the fourth baffle and opposite to the through hole B, adjusting screws B are arranged in the screw holes B, a flange table abutting against the top end of the spring B is arranged on the screw rod of the adjusting screw.

2. The tailboard slide mechanism of claim 1, wherein: A cover plate is arranged on the top surface of the slide plate base, a vertical rod through hole is arranged on the cover plate, a first proximity switch is arranged on the cover plate, a connecting plate is arranged on the upper end of the vertical rod and outside the vertical through hole A, and a second proximity switch is arranged on the connecting plate.

3. The tailboard slide mechanism of claim 1, wherein: A self-lubricating bearing is arranged in the through hole of the fourth baffle, a guide sleeve is arranged in the self-lubricating bearing, and the screw B is screwed with the slide plate base through the guide sleeve.

4. The tailboard slide mechanism of claim 3, wherein: The vertical rod is three-sectioned, including an upper section outside the vertical through hole A, a middle section inside the vertical through hole A and a lower section, the spring A is arranged on the outer wall of the middle section, and the upper section and the middle section are hollow rods.

5. The tailboard slide mechanism of claim 4, wherein: A center is connected to the bottom surface of the slide plate base.

6. A gear grinding machine comprising the tailstock slide plate mechanism according to any one of claims 1-5.

7. A gear hobbing machine comprising the tailstock slide plate mechanism according to any one of claims 1-5.

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