Cutter-loosening-preventing piston rotating device for telescopic main shaft of numerical control machine tool

Abstract

The utility model provides a numerical control machine tool telescopic main shaft cutter loosening prevention piston rotation device which comprises a main shaft outer sleeve, a first bearing is fixedly installed on the inner wall of the main shaft outer sleeve, a main shaft is arranged in the first bearing, a sliding sleeve is installed in the main shaft through a pull rod, and a cutter beating rod is fixedly installed on one side of the sliding sleeve. A cover plate is fixedly installed at one end of the main shaft, a connecting flange is fixedly installed at one end of the main shaft outer sleeve, and an oil cylinder outer shell is fixedly installed at one end of the connecting flange. According to the novel oil cylinder, the limiting mechanism is arranged in the oil cylinder shell and can limit the piston, so that the piston cannot rotate in the oil cylinder shell, and the plane thrust bearing is arranged between the unclamping rod and the piston, so that the piston and the unclamping rod are not in direct contact and cannot rotate along with the main shaft; the contact surface of the piston and the unclamping rod is prevented from being abraded, and a sealing ring in the piston is prevented from being damaged.

Description

Technical Field

[0001] The utility model relates to the technical field of telescopic spindles for numerically controlled machine tools, in particular to a piston rotating device for preventing tool loosening of a telescopic spindle for numerically controlled machine tools. Background Art

[0002] CNC machine tools are automatic machine tools equipped with program control systems. CNC machines include machine tools that use telescopic spindles. The automatic tool change of the telescopic spindle of this type of machine tool relies on the compression and return of the disc spring to achieve the tool change operation of the pull claw. The compression of the disc spring is pushed and squeezed by the movement of the hydraulic cylinder piston, and its return relies on the elastic force of the disc spring itself. When the machine tool is working, the telescopic shaft rotates at high speed, and the piston is set inside the cylinder shell and is fixed. The internal pull rod and disc spring of the telescopic spindle rotate with the telescopic spindle. After the telescopic spindle changes the tool, the telescopic spindle itself continues to rotate. When the piston has not fully returned, the telescopic spindle will drive the piston to rotate together, which is easy to cause wear on the contact surface between the piston and the tool rod and damage to the internal sealing ring of the piston.

[0003] To this end, the utility model provides a piston rotation device for preventing tool loosening of a telescopic spindle of a numerically controlled machine tool. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model aims to provide a piston rotation device for preventing tool loosening of a telescopic spindle of a CNC machine tool, so as to solve the problems raised in the above-mentioned background technology. The utility model arranges a limiting mechanism inside the oil cylinder housing, which can limit the piston so that the piston cannot rotate inside the oil cylinder housing, and arranges a planar thrust bearing between the cutter rod and the piston, so that there is no direct contact between the piston and the cutter rod and the piston will not rotate with the spindle, thereby avoiding wear of the contact surface between the piston and the cutter rod and damage to the internal sealing ring of the piston, and the utility model has high practicality.

[0005] In order to achieve the above-mentioned purpose, the utility model is implemented through the following technical scheme: a CNC machine tool telescopic spindle anti-tool loosening piston rotation device comprises a spindle outer sleeve, a first bearing is fixedly installed on the inner wall of the spindle outer sleeve, a spindle is arranged inside the first bearing, a sliding sleeve is installed inside the spindle through a pull rod, a tool-beating rod is fixedly installed on one side of the sliding sleeve, a cover plate is fixedly installed at one end of the spindle, a connecting flange is fixedly installed at one end of the spindle outer sleeve, a cylinder housing is fixedly installed at one end of the connecting flange, a piston is movably installed inside the cylinder housing through a limiting mechanism, an anti-rotation mechanism is arranged between the piston and the tool-beating rod, the anti-rotation mechanism comprises a planar thrust bearing and a limiting cover, and the limiting mechanism comprises a fixing rod, and the fixing rod is fixedly arranged on four sides inside the cylinder housing.

[0006] Furthermore, the pull rod is fixedly installed inside the knife-beating rod, the pull rod is fixedly connected to the sliding sleeve, and the sliding sleeve is limitedly slidably installed inside the main shaft.

[0007] Furthermore, a disc spring is fixedly installed on the outer side of the pull rod corresponding to the inner side of the main shaft, and the disc spring is arranged on one side of the sliding sleeve and contacts therewith.

[0008] Furthermore, one end of the knife-beating rod is arranged inside the piston through a needle bearing, and the planar thrust bearing is arranged between the other end of the knife-beating rod and the piston.

[0009] Furthermore, the planar thrust bearing comprises two planar washers, balls and a retainer, the balls are equidistantly rotatably mounted inside the retainer, and the retainer is arranged between the two planar washers.

[0010] Furthermore, the two planar washers are respectively fixedly mounted on the outer side of the other end of the knife-beating rod and the inside of the piston, and the limiting cover is mounted on the outer side of one end of the piston.

[0011] Furthermore, the plane washer on the left side is rotatably mounted inside the limiting cover, and screw holes are provided inside the inner wall of one end of the limiting cover and on the outer wall of the piston, and screws are threadedly mounted inside the screw holes.

[0012] Furthermore, a sliding hole is provided inside the piston at a position corresponding to the fixed rod, the fixed rod is slidably installed inside the sliding hole, an inner rubber ring is fixedly provided on the inner wall of the inner wall of the sliding hole corresponding to the outer side of the fixed rod, an annular groove is provided on the outer wall of the piston, a V-shaped rubber ring is installed inside the annular groove, and sealing rubber rings are provided inside the inner wall of the cylinder shell at both ends of the piston corresponding to the inner wall of the cylinder shell.

[0013] The beneficial effects of the utility model are as follows: the utility model is a CNC machine tool telescopic spindle preventive tool loosening piston rotating device, wherein a sliding fixing rod is fixedly installed on the four sides of the inner part of the oil cylinder shell, and the piston is slidably installed on the fixing rod through a sliding hole, and the piston can be limited by a limiting mechanism such as a sliding rod and a sliding hole, so that the piston cannot rotate inside the oil cylinder shell, and a plane thrust bearing is arranged between the tool hitting rod and the piston, so that there is no direct contact between the piston and the tool hitting rod and the piston will not rotate with the main shaft, thereby avoiding wear of the contact surface between the piston and the tool hitting rod and damage to the sealing ring inside the piston, and the utility model is highly practical; the plane thrust bearing can be limited by the setting of a limiting cover, which is convenient for improving the stability of the plane thrust bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is the internal structure diagram of the utility model of the CNC machine tool telescopic spindle to prevent the tool loose piston rotating device;

[0015] Figure 2The utility model is a piston rotating device for preventing the tool loosening of the telescopic spindle of a CNC machine tool Figure 1 Enlarged view of point A in the middle;

[0016] Figure 3 This is a structural diagram of the piston and the tool-beating rod of the utility model of the piston rotating device for preventing tool loosening of the telescopic spindle of a CNC machine tool;

[0017] Figure 4 This is a structural diagram of a limit cover of a piston rotating device for preventing tool loosening of a telescopic spindle of a CNC machine tool according to the utility model;

[0018] In the figure: 1. spindle outer sleeve; 2. spindle; 3. first bearing; 4. cover plate; 5. pull rod; 6. disc spring; 7. knife rod; 8. connecting flange; 9. cylinder housing; 10. piston; 11. fixing rod; 12. sealing rubber ring; 13. plane thrust bearing; 14. limit cover; 15. annular groove; 16. sliding hole; 17. screw hole. DETAILED DESCRIPTION

[0019] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0020] See also Figures 1 to 4 The utility model provides a technical solution: a CNC machine tool telescopic spindle anti-loosening piston rotating device, comprising a spindle outer sleeve 1, a first bearing 3 is fixedly installed on the inner wall of the spindle outer sleeve 1, a spindle 2 is arranged inside the first bearing 3, a sliding sleeve is installed inside the spindle 2 through a pull rod 5, a knife-beating rod 7 is fixedly installed on one side of the sliding sleeve, a cover plate 4 is fixedly installed on one end of the spindle 2, a connecting flange 8 is fixedly installed on one end of the connecting flange 8, a cylinder shell 9 is fixedly installed on one end of the cylinder shell 9, and the inner A piston 10 is movably installed on the part through a limiting mechanism, an anti-rotation mechanism is arranged between the piston 10 and the knife rod 7, the anti-rotation mechanism includes a plane thrust bearing 13 and a limiting cover 14, the limiting mechanism includes a fixing rod 11, and the fixing rod 11 is fixedly arranged on four sides of the inside of the cylinder housing 9. The connecting flange 8 can fix the main shaft sleeve 1 and the cylinder housing 9. The plane thrust bearing 13 can prevent the piston 10 from rotating together with the main shaft 2, avoid wear between the piston 10 and the knife rod 7, and prevent damage to the piston 10.

[0021] In this embodiment, the pull rod 5 is fixedly installed inside the knife-beating rod 7, the pull rod 5 is fixedly connected to the sliding sleeve, the sliding sleeve is limitedly slidably installed inside the main shaft 2, and a disc spring 6 is fixedly installed on the outside of the pull rod 5 corresponding to the inside of the main shaft 2. The disc spring 6 is arranged on one side of the sliding sleeve and contacts with it. The knife-beating rod 7 can squeeze the disc spring 6 through the pull rod 5 and the sliding sleeve, so that the disc spring 6 generates elastic force, which is convenient for helping the piston 10 to return to its position later.

[0022] In this embodiment, one end of the knife-beating rod 7 is arranged inside the piston 10 through a needle bearing, and the plane thrust bearing 13 is arranged between the other end of the knife-beating rod 7 and the piston 10. The plane thrust bearing 13 includes two plane washers, balls and retainers. The balls are equidistantly rotated and installed inside the retainer. The retainer is arranged between the two plane washers. The two plane washers are respectively fixedly installed on the outside of the other end of the knife-beating rod 7 and the inside of the piston 10. The limit cover 14 is installed on the outside of one end of the piston 10. The left plane washer rotates It is installed inside the limit cover 14, and a screw hole 17 is opened on the inner wall of one end of the limit cover 14 and the outer wall of the piston 10. A screw is installed inside the screw hole 17. By setting a planar thrust bearing 13, when the cutter rod 7 rotates with the main shaft 2, the two planar washers rotate relative to each other through the ball bearings, so as to prevent wear between the cutter rod 7 and the piston 10 and avoid damage to the piston 10. The limit cover 14 is conveniently fixed by installing screws inside the screw hole 17, and the stability of the planar thrust bearing 13 can be improved by the limit cover 14.

[0023] In this embodiment, a sliding hole 16 is provided inside the piston 10 at a position corresponding to the fixed rod 11, and the fixed rod 11 is slidably installed inside the sliding hole 16. An inner rubber ring is fixedly provided on the inner wall of the inner wall of the sliding hole 16 corresponding to the outer side of the fixed rod 11. An annular groove 15 is provided on the outer wall of the piston 10, and a V-shaped rubber ring is installed inside the annular groove 15. Sealing rubber rings 12 are provided inside the inner wall of the cylinder housing 9 at both ends of the piston 10 corresponding to the inner wall of the cylinder housing 9. The piston 10 can be limited by the joint action of the fixed rod 11 and the sliding hole 16 to prevent the piston 10 from rotating inside the cylinder housing 9 and avoid damage to the piston 10 and the sealing rubber ring 12. The sealing rubber ring 12 can seal between the fixed rod 11 and the sliding hole 16 to improve the sealing between the piston 10 and the cylinder housing 9.

[0024] When the CNC machine tool telescopic spindle tool loosening prevention piston rotating device is used, the cylinder housing 9 is fixedly connected to one end of the connecting flange 8 by screws, the connecting flange 8 and the spindle outer sleeve 1 are fixedly connected by screws, and the sliding fixing rods 11 are fixedly installed on the four sides of the cylinder housing 9. When hydraulic oil is introduced into the right side of the corresponding piston 10 in the cylinder housing 9, the hydraulic oil squeezes the piston 10 to move to the left, and the piston 10 slides on the outside of the fixing rod 11 through the sliding hole 16. The piston 10 can be limited by the limiting mechanisms such as the fixing rod 11 and the sliding hole 16. The piston 10 cannot rotate inside the cylinder housing 9, and a planar thrust bearing 13 is set between the cutter rod 7 and the piston 10. When the piston 10 moves to the left, the cutter rod 7 is squeezed by the planar thrust bearing 13, so that there is no direct contact between the piston 10 and the cutter rod 7, and the piston 10 will not rotate with the main shaft 2, thereby avoiding wear of the contact surface between the piston 10 and the cutter rod 7 and damage to the sealing rubber ring 12 inside the piston 10, and the practicality is high; the planar thrust bearing 13 can be limited by the set limit cover 14, which is convenient for improving the stability of the planar thrust bearing 13.

[0025] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A piston rotating device for preventing tool loosening of a telescopic spindle of a CNC machine tool, comprising a spindle housing (1), characterized in that: A first bearing (3) is fixedly mounted on the inner wall of the main shaft outer sleeve (1), a main shaft (2) is arranged inside the first bearing (3), a sliding sleeve is installed inside the main shaft (2) via a pull rod (5), a knife rod (7) is fixedly mounted on one side of the sliding sleeve, a cover plate (4) is fixedly mounted on one end of the main shaft (2), a connecting flange (8) is fixedly mounted on one end of the main shaft outer sleeve (1), a cylinder housing (9) is fixedly mounted on one end of the connecting flange (8), a piston (10) is movably mounted inside the cylinder housing (9) via a limiting mechanism, an anti-rotation mechanism is arranged between the piston (10) and the knife rod (7), the anti-rotation mechanism comprises a planar thrust bearing (13) and a limiting cover (14), the limiting mechanism comprises a fixing rod (11), and the fixing rod (11) is fixedly mounted on four sides inside the cylinder housing (9).

2. The CNC machine tool telescopic spindle tool loosening prevention piston rotating device according to claim 1, characterized in that: The pull rod (5) is fixedly installed inside the knife-beating rod (7), the pull rod (5) is fixedly connected to the sliding sleeve, and the sliding sleeve is limitedly slidably installed inside the main shaft (2).

3. The CNC machine tool telescopic spindle tool loosening prevention piston rotating device according to claim 2, characterized in that: A disc spring (6) is fixedly installed on the outer side of the pull rod (5) corresponding to the inside of the main shaft (2), and the disc spring (6) is arranged on one side of the sliding sleeve and contacts therewith.

4. The CNC machine tool telescopic spindle tool loosening prevention piston rotating device according to claim 1, characterized in that: One end of the knife-beating rod (7) is arranged inside the piston (10) via a needle bearing, and the plane thrust bearing (13) is arranged between the other end of the knife-beating rod (7) and the piston (10).

5. The CNC machine tool telescopic spindle tool loosening prevention piston rotating device according to claim 4, characterized in that: The planar thrust bearing (13) comprises two planar washers, balls and a retainer, wherein the balls are equidistantly rotatably mounted inside the retainer, and the retainer is arranged between the two planar washers.

6. The piston rotating device for preventing tool loosening of a telescopic spindle of a CNC machine tool according to claim 5 is characterized in that: The two plane washers are respectively fixedly mounted on the outside of the other end of the knife rod (7) and inside the piston (10), and the limit cover (14) is mounted on the outside of one end of the piston (10).

7. The piston rotating device for preventing tool loosening of a telescopic spindle of a CNC machine tool according to claim 6 is characterized in that: The left plane washer is rotatably mounted inside the limiting cover (14), and a screw hole (17) is provided inside the inner wall of one end of the limiting cover (14) and on the outer wall of the piston (10), and a screw is threadedly mounted inside the screw hole (17).

8. The piston rotating device for preventing tool loosening of a telescopic spindle of a CNC machine tool according to claim 1 is characterized in that: A sliding hole (16) is provided inside the piston (10) at a position corresponding to the fixed rod (11), the fixed rod (11) is slidably mounted inside the sliding hole (16), an inner rubber ring is fixedly arranged on the inner wall of the inner wall of the sliding hole (16) corresponding to the outer side of the fixed rod (11), an annular groove (15) is provided on the outer wall of the piston (10), a V-shaped rubber ring is installed inside the annular groove (15), and sealing rubber rings (12) are arranged inside the inner wall of the cylinder housing (9) at both ends of the piston (10).

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