Adjusting assembly for jacking force of power tailstock

Abstract

The utility model discloses an adjusting assembly for the tightening force of a power tailstock, which is applied to the power tailstock and comprises an adjusting screw rod, a fixed support, a spring and a nut seat, the fixed support is arranged at the bottom of the power tailstock, the nut seat is connected with the power tailstock in a sliding mode, and the nut seat and the fixed support are oppositely arranged. The adjusting screw comprises a threaded section and a supporting end close to the nut seat, the fixing support is provided with a threaded hole, the adjusting screw is in threaded connection with the fixing support, the spring is arranged between the fixing support and the nut seat, a plane bearing is arranged between the supporting end of the adjusting screw and the spring, a lead screw is further arranged in the base, and a nut is arranged on the nut seat. The nut is in threaded connection with the lead screw. According to the size of a part to be machined, the purpose of changing the pre-tightening force of the spring is achieved by rotating the adjusting screw rod to compress or loosen the spring, then the jacking force of the power tailstock is changed, jacking of parts of different sizes is facilitated, and the precision of the whole machine tool is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of machine tool components, in particular to an adjustment component for the tightening force of a power tailstock. Background Art

[0002] The tailstock is one of the important parts of machine tools, and it plays an important role in machine tool processing. The tailstock is often used to assist in the processing of shaft parts with large axial dimensions. If the axial dimensions of the parts are too large, the shaft parts will have radial runout due to the existence of large radial cutting forces, and cannot be processed.

[0003] When machining parts on a machine tool, in order to improve the reliability of the clamping of the parts, one end of the machined part is often clamped by the spindle box chuck, and the other end is supported by the tailstock top. Due to the different sizes of parts, the required clamping force is also different. Improper use of the clamping force may deform the workpiece and cause the parts to be scrapped. If the clamping mechanism is installed too high on the power tailstock, the overall rigidity of the power tailstock will decrease, which is not conducive to machining parts with high hardness. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and proposes an adjustment component for the tightening force of a power tailstock.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions: an adjustment component for the tightening force of a power tailstock, applied to the power tailstock, the power tailstock is slidably arranged on a base through a tailstock guide rail, and includes an adjusting screw, a fixed bracket, a spring and a nut seat, the fixed bracket is arranged at the bottom of the power tailstock, the nut seat is slidably connected to the power tailstock, the nut seat is arranged opposite to the fixed bracket, the adjusting screw includes a threaded section and a supporting end close to the nut seat, the fixed bracket is provided with a threaded hole, the adjusting screw is threadedly connected to the fixed bracket, the spring is arranged between the fixed bracket and the nut seat, a plane bearing is provided between the supporting end of the adjusting screw and the spring, a screw rod is also provided in the base, a nut is provided on the nut seat, and the nut is threadedly connected to the screw rod.

[0006] Furthermore, a guide rod is provided at one end of the nut seat connected to the spring, and the spring is sleeved on the guide rod.

[0007] Furthermore, the inner ring of the plane bearing is fixed to the supporting end of the adjusting screw, and the outer ring of the plane bearing is rotatably connected to the spring.

[0008] Furthermore, the spring is sleeved on the supporting end of the adjusting screw rod to avoid the spring from falling off when adjusting the spring preload.

[0009] Furthermore, a long axis parallel to the tailstock guide rail is provided at the side end of the base, a sensing block is provided on the long axis, and a sensor is provided on the power tailstock, and the sensor is used to identify the sensing block. According to the elongated length of the workpiece, the position of the sensing block on the long axis is adjusted, and the screw rod rotates to drive the power tailstock to move toward the workpiece. When the sensor recognizes the sensing block, the screw rod stops rotating, so that the power tailstock can tighten the workpiece.

[0010] Furthermore, the major axis is provided with scales.

[0011] Furthermore, the nut seat is slidably connected to the power tail frame through a sliding mechanism.

[0012] Furthermore, the sliding mechanism includes a slideway and a slider arranged in the slideway, the slideway is arranged on the power tail frame, and one end of the slider extending out of the slideway is fixed to the nut seat. Beneficial Effects

[0013] The utility model compresses or relaxes the spring by rotating the adjusting screw according to the size of the part to be processed, thereby changing the pre-tightening force of the spring, thereby realizing the change of the tightening force of the power tailstock, which is helpful for tightening parts of different sizes and improving the accuracy of the overall machine tool.

[0014] The utility model arranges the tightening component at the bottom of the tailstock of the machine tool, so that the rigidity of the power tailstock is improved, and when processing a workpiece with high hardness, the power tailstock will not be deformed, which is beneficial to improving the processing accuracy and stability.

[0015] The utility model adopts a spring with great elastic force. By adding a plane bearing, the inner ring of the plane bearing is fixed to the elongated section of the adjusting screw, and the outer ring of the plane bearing is in contact with the spring, so as to reduce the friction force when the adjusting screw is rotated, and prevent the spring from twisting and failing due to excessive friction force. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the structure of the power tailstock with adjustable tightening force proposed by the utility model;

[0017] Figure 2 A top view of the cross-sectional view of the power tailstock with adjustable top tightening force proposed by the utility model;

[0018] Figure 3 This is a schematic diagram of the sliding mechanism structure proposed by the utility model;

[0019] Legend: 1. Adjusting screw; 2. Lead screw; 3. Plane bearing; 4. Spring; 5. Guide rod; 6. Nut seat; 7. Nut; 8. Tail stock guide rail; 9. Sensor; 10. Induction block; 11. Power tail stock; 12. Long shaft; 13. Fixed bracket; 140. Sliding mechanism; 141. Slideway; 142. Several slide blocks; 15. Base. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] Reference Figure 1-2 The utility model provides an adjustment component for the tightening force of a power tailstock, which is applied to a power tailstock 11. The power tailstock 11 is slidably arranged on a base 15 through a tailstock guide rail 8, and includes an adjusting screw 1, a fixing bracket 13, a spring 4 and a nut seat 6. The fixing bracket 13 is arranged at the bottom of the power tailstock 11, and the nut seat 6 is arranged opposite to the fixing bracket 13. The nut seat 6 is slidably connected to the power tailstock 11. The adjusting screw 1 includes a threaded section and a supporting end close to the nut seat 6. The fixing bracket 13 is provided with a threaded hole. The adjusting screw 1 is threadedly connected to the fixing bracket 13. The spring 4 is arranged between the fixing bracket 13 and the nut seat 6. A plane bearing 3 is provided between the supporting end of the adjusting screw 1 and the spring 4. A screw rod 2 is also provided in the base 15. A nut 7 is provided on the nut seat 6, and the nut 7 is threadedly connected to the screw rod 2.

[0022] The inner ring of the plane bearing 3 is fixed to the supporting end of the adjusting screw 1, and the outer ring of the plane bearing 3 is rotatably connected to the spring 4;

[0023] In actual application, since the force of the spring 4 is very large, the outer ring of the plane bearing 3 contacts the spring, reducing the friction when the adjusting screw 1 is rotated, and preventing the spring 4 from twisting and failing due to excessive friction.

[0024] The side end of the base 15 is provided with a long axis 12 parallel to the tail frame guide rail 8, the long axis 12 is provided with a sensing block 10, and the power tail frame 11 is provided with a sensor 9, and the sensor 9 is used to identify the sensing block 10;

[0025] In actual application, according to the size of the workpiece to be processed, the sensing block 10 is moved to the corresponding position on the long axis 12 with scale, and then the sensing block 10 is fixed. The screw rod 2 drives the nut seat 6 and the power tail stock 11 to move toward the workpiece to be processed. When the sensor 9 recognizes the sensing block 10, the screw rod 2 stops moving. At this time, the power tail stock 11 will tighten the workpiece to be processed, thereby ensuring that the tightening force matches the size of the workpiece.

[0026] refer to Figure 3 The nut seat is slidably connected to the power tail frame through a sliding mechanism. The sliding mechanism 140 includes a slide 141 and a plurality of fixed blocks 142 arranged in the slide 141. The slide 141 is arranged at the bottom of the power tail frame 11. The bottom of the fixed block 142 extends out of the slide 141 and is fixed to the nut seat 6, so that the power tail frame 11 moves independently relative to the nut seat 6.

[0027] The spring 4 is sleeved on the supporting end of the adjusting screw 1. At the same time, a guide rod 5 is provided at one end of the nut seat 6 connected to the spring 4. The spring 4 is sleeved on the guide rod 5. In actual use, the spring 4 is prevented from falling off.

[0028] Working principle: The utility model compresses or relaxes the spring 2 by rotating the adjusting screw 1 according to the size of the part to be processed, changes the preload force of the spring 2, and then changes the tightening force of the power tailstock 11, which is helpful for tightening parts of different sizes and improving the overall machine tool accuracy. At the same time, by setting the tightening component at the bottom of the machine tool tailstock 11, the rigidity of the power tailstock 11 is improved, and when processing workpieces with high hardness, the power tailstock 11 will not be deformed, which is conducive to improving the processing accuracy and stability.

[0029] 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. An adjustment assembly for the tightening force of a power tail frame, applied to a power tail frame (11), wherein the power tail frame (11) is slidably arranged on a base (15) via a tail frame guide rail (8), and characterized in that: The invention comprises an adjusting screw (1), a fixing bracket (13), a spring (4) and a nut seat (6), wherein the fixing bracket (13) is arranged at the bottom of the power tail frame (11), the nut seat (6) is slidably connected to the power tail frame (11), the nut seat (6) and the fixing bracket (13) are arranged opposite to each other, the adjusting screw (1) comprises a threaded section and a supporting end close to the nut seat (6), the fixing bracket (13) is provided with a threaded hole, the adjusting screw (1) is threadedly connected to the fixing bracket (13), the spring (4) is arranged between the fixing bracket (13) and the nut seat (6), a plane bearing (3) is arranged between the supporting end of the adjusting screw (1) and the spring (4), a screw rod (2) is further arranged in the base (15), a nut (7) is arranged on the nut seat (6), and the nut (7) is threadedly connected to the screw rod (2).

2. The adjusting assembly for the tightening force of the power tailstock according to claim 1, characterized in that: One end of the nut seat (6) connected to the spring (4) is provided with a guide rod (5), and the spring (4) is sleeved on the guide rod (5).

3. The adjusting assembly for the tightening force of the power tailstock according to claim 1 is characterized in that: The inner ring of the plane bearing (3) is fixed to the supporting end of the adjusting screw (1), and the outer ring of the plane bearing (3) is rotatably connected to the spring.

4. The adjusting assembly for the tightening force of the power tailstock according to claim 3 is characterized in that: The spring (4) is sleeved on the supporting end of the adjusting screw (1).

5. The adjusting assembly for the tightening force of the power tailstock according to claim 1 is characterized in that: A long axis (12) parallel to the tail frame guide rail (8) is also provided at the side end of the base (15), a sensing block (10) is provided on the long axis (12), and a sensor (9) is provided on the power tail frame (11), and the sensor (9) is used to identify the sensing block (10).

6. The adjusting assembly for the tightening force of the power tailstock according to claim 5, characterized in that: The major axis (12) is provided with a scale.

7. The adjusting assembly for the tightening force of the power tailstock according to claim 1 is characterized in that: The nut seat (6) is slidably connected to the power tail frame (11) via a sliding mechanism (140).

8. The adjusting assembly for the tightening force of the power tailstock according to claim 7 is characterized in that: The sliding mechanism (140) comprises a slideway (141) and a slider (142) disposed in the slideway (141); the slideway (141) is disposed on the power tail frame (11); one end of the slider (142) extending out of the slideway (141) is fixed to the nut seat (6).

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