High-stability servo cutter unfolding power head

Abstract

The utility model discloses a high-stability servo unfolding cutter power head which comprises a mounting seat, an unfolding cutter is arranged at one end of the mounting seat, and the other end of the mounting seat is connected with a sleeve through a fixing frame. A telescopic cylinder is arranged in the mounting seat in a sliding and sleeving manner, and an axial telescopic driving part is connected to the telescopic cylinder; a rotating main shaft is rotationally clamped in the telescopic cylinder, one end of the rotating main shaft is connected with the unfolding knife, and a sliding sleeve slidably arranged in the sleeve is rotationally clamped at the other end of the rotating main shaft; a first limiting sliding groove is formed in the sleeve, and a first limiting sliding block connected to the sliding sleeve is arranged in the first limiting sliding groove in a limiting and sliding mode. One end of the telescopic cylinder is externally and hermetically connected with a sealing head which hermetically covers the end part of the telescopic cylinder; a push-pull rod is arranged in the rotating main shaft, one end of the push-pull rod is connected with the unfolding knife, and the other end of the push-pull rod is connected with a stretching driving part; and the rotating main shaft is connected with a driving part through a spline structure. The utility model not only can improve the operation stability, but also has the advantages of being more convenient to lubricate and maintain.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of knife opening power head, especially a high stability servo knife opening power head. BACKGROUND

[0002] The knife opening power head is an important part of the numerical control machine tool, can realize rotation, axial feeding, radial movement action, thereby can efficiently complete the complex part processing demand.

[0003] The applicant has researched and developed a high stability servo double-coordinate knife opening power head disclosed by ZL202120895728.0, which is provided with a high sealing head, so that the cooling liquid during part processing can be prevented from entering the knife opening power head, thereby ensuring the operation stability of the knife opening power head. However, the main structures in the device are connected on one side of the machine body, and the connecting block for connecting the stretching driving part is only matched with the three parallel guide rails on the machine body through the three-groove sliding guide block on the bottom surface to maintain the stability during the axial movement of the rotating main shaft. During actual installation and use, due to various installation angles, the stress uniformity between the three-groove sliding guide block on the bottom surface of the connecting block and the three guide rails on the machine body is poor under the influence of different gravity, the stability during operation is poor and vibration is prone to occur, thereby affecting the machining precision of the parts.

[0004] Therefore, the existing knife opening power head has the problem of poor operation stability. INVENTION CONTENTS

[0005] The utility model discloses a high stability servo knife opening power head, which has the advantages of high operation stability.

[0006] The utility model discloses a high stability servo knife opening power head, which has the advantages of high operation stability. A high stability servo knife opening power head, comprising a mounting seat, one end of the mounting seat is provided with a knife opening, the other end of the mounting seat is provided with a sleeve, a fixing frame is connected between the mounting seat and the sleeve; a telescopic cylinder is slidably sleeved in the mounting seat, an axial telescopic driving part for driving the telescopic cylinder to slide relative to the mounting seat is connected to the mounting seat; a rotating main shaft with two ends extending out of the telescopic cylinder is rotatably connected in the telescopic cylinder, one end of the rotating main shaft is connected with the knife opening, and the other end of the rotating main shaft is rotatably connected with a sliding sleeve; the sliding sleeve is slidably arranged in the sleeve, one side of the sleeve is provided with an axial first limiting sliding groove, and a first limiting sliding block connected with the sliding sleeve is limitingly and slidably arranged in the first limiting sliding groove; one end of the rotating main shaft is connected with the knife opening, and the other end of the rotating main shaft is rotatably connected with a sliding sleeve; the sliding sleeve is slidably arranged in the sleeve, one side of the sleeve is provided with an axial first limiting sliding groove, and a first limiting sliding block connected with the sliding sleeve is limitingly and slidably arranged in the first limiting sliding groove; the rotating main shaft is provided with a push-pull rod, one end of the push-pull rod is connected with the knife opening, and the other end of the push-pull rod is connected with a stretching driving part fixed on the sliding sleeve for driving the push-pull rod; the rotating main shaft is connected with a driving part fixed on the fixing frame for driving the rotating main shaft to rotate through a spline structure.

[0007] In the high-stability servo cutter head, the axial telescopic driving part comprises a first servo motor fixed on the mounting base and arranged axially along the telescopic cylinder, a first screw rod connected to the output shaft of the first servo motor, a first sliding block sleeved with the outer thread of the first screw rod, and a connecting plate fixedly connected between the first sliding block and the telescopic cylinder; the mounting base is provided with a displacement slot corresponding to the movement path of the connecting plate.

[0008] In the high-stability servo cutter head, the mounting base is provided with sliding rails arranged axially along the telescopic cylinder on both sides of the connecting plate, and a connecting block fixed on both sides of the connecting plate is slidingly connected to the sliding rails.

[0009] In the high-stability servo cutter head, the stretching driving part comprises a second servo motor fixed on the end of the sliding sleeve and arranged axially along the sleeve, a second screw rod connected to the output shaft of the second servo motor, a second sliding block connected to the outer thread of the second screw rod, a sliding sleeve slidingly arranged in the sliding sleeve and connected to the second sliding block, the sliding sleeve being rotatably connected to the outside of the end of the push-pull rod, and a second limiting sliding block radially extending outward and slidingly arranged in the first limiting slot; the sliding sleeve is provided with a second limiting slot corresponding to the movement path of the second limiting sliding block.

[0010] In the high-stability servo cutter head, the sliding sleeve is provided with a displacement slot communicating with the second limiting slot and the first limiting slot; the push-pull rod is hollow, and one end of the push-pull rod corresponding to the sliding sleeve rotatably connected is connected to a first oil injection pipe through a rotary joint, and the end of the first oil injection pipe is outwardly arranged through the displacement slot, the first limiting slot and the second limiting slot.

[0011] In the high-stability servo cutter head, one end of the second servo motor connected to the sliding sleeve is arranged to extend out of the sleeve; one side of the second sliding block is connected to a second oil injection pipe through an oil injection joint, and the end of the second oil injection pipe extends out of the end surface of the one end of the second servo motor connected to the sliding sleeve.

[0012] In the high-stability servo cutter head, the sliding sleeve is provided with a maintenance opening corresponding to the side surface of the oil injection joint.

[0013] In the high-stability servo cutter head, the driving part comprises a spline sleeve fitted on the spline outside of the rotating main shaft, one end of the spline sleeve is provided with a first side piece extending radially outward, a driven wheel is fixed on the first side piece and is sleeved on the spline sleeve, a fixed sleeve is arranged between the driven wheel and the spline sleeve, the other end of the fixed sleeve opposite to the first side piece is provided with a second side piece extending radially outward, the second side piece is fixedly connected with the mounting base, and the fixed sleeve is rotatably connected with the driven wheel through a bearing.

[0014] Compared with the prior art, the sleeve is fixed on the mounting base, the sliding sleeve is rotatably connected with the end of the rotating main shaft and is slidably arranged in the sleeve, so that the sliding sleeve driven by the rotating main shaft can be covered and limited by the sleeve during extension and retraction of the rotating main shaft, and the sliding sleeve is connected with a first limiting sliding block, the sleeve is provided with a first limiting sliding groove in sliding fit with the first limiting sliding block, so that the sliding sleeve can stably move axially relative to the sleeve, and the operation stability is improved.

[0015] In addition, the axial extension driving part is driven by the first servo motor fixed on the mounting base to rotate the first lead screw, so that the first sliding block sleeved with the first lead screw moves axially along the mounting base through the connecting plate, the connecting plate is slidably arranged in the accommodation sliding groove of the mounting base, and the two sides of the connecting plate are connected with the connecting blocks slidably arranged on the two slide rails, so that the stability of the extension cylinder moving axially along the mounting base is high.

[0016] The stretching driving part is driven by the No. 2 servo motor to rotate the No. 2 lead screw, so that the No. 2 sliding block connected with the No. 2 lead screw moves axially in the sliding sleeve, and the sliding sleeve drives the push-pull rod to move axially in the rotating main shaft, thereby driving the cutter to move radially. The sliding sleeve is connected with the No. 2 limiting sliding groove and the No. 1 limiting sliding groove of the sleeve, which are located outside the sliding sleeve and are limited to slide, thereby improving the axial movement stability of the sliding sleeve and preventing the sliding sleeve from rotating. The No. 1 oil injection pipe can pass through the No. 1 limiting sliding groove, the No. 2 limiting sliding groove and the gap in the sliding sleeve, and then is connected with the end of the push-pull rod through the rotary joint, so that the lubricating oil is injected into the cutter through the hollow push-pull rod for lubrication. The lubrication operation is more convenient. In addition, the No. 2 oil injection pipe can be connected with the end face of the No. 2 servo motor through the oil injection joint, so that the No. 2 oil injection pipe is not easily affected when the sliding sleeve moves axially relative to the sliding sleeve, and the No. 2 lead screw and the No. 2 sliding block in the sliding sleeve are lubricated conveniently. The end of the sliding sleeve connected with the No. 2 servo motor extends out of the sleeve, and the maintenance opening corresponding to the oil injection joint is arranged on the side surface of the end, so that the maintenance operation of the oil injection joint is facilitated.

[0017] The driving part is driven by the main shaft motor on the fixing frame to rotate the driving wheel, and then the synchronous belt drives the driven wheel to rotate. The driven wheel can drive the spline sleeve fixedly connected thereto to rotate. The spline sleeve is matched with the spline outside the end of the rotating main shaft, and the spline sleeve can drive the rotating main shaft to rotate when the spline sleeve rotates. The rotating main shaft can move radially relative to the spline sleeve during rotation, so that the cutter can be rotated and fed. The spline sleeve is provided with a first side piece extending radially outward at one end. The driven wheel is sleeved outside the spline sleeve and is fixedly connected with the first side piece. The fixed sleeve is arranged between the driven wheel and the spline sleeve. The second side piece extending radially outward is arranged on the other end of the fixed sleeve relative to the first side piece. The second side piece is fixedly connected with the mounting seat. The bearing is connected between the fixed sleeve and the driven wheel. The stability of the spline sleeve and the driven wheel is improved, so that they will not move axially synchronously with the rotating main shaft, and the operation stability is ensured.

[0018] Therefore, the utility model not only can improve the operation stability, but also has the advantages of convenient lubrication and convenient maintenance. BRIEF DESCRIPTION OF DRAWINGS

[0019] Fig. 1 is the structure schematic diagram of the utility model;

[0020] Fig. 2 is the structure schematic diagram of the other side of the utility model;

[0021] Fig. 3 is the sectional view of the utility model;

[0022] Fig. 4 is the structure schematic diagram of the maintenance opening part.

[0023] The signs in the drawings are: 1 - mounting seat, 2 - sleeve, 3 - fixed frame, 4 - telescopic cylinder, 5 - rotating main shaft, 6 - sliding sleeve, 7 - one-way limit sliding groove, 8 - one-way limit sliding block, 9 - end cap, 10 - push-pull rod, 11 - one-way servo motor, 12 - one-way lead screw, 13 - one-way sliding block, 14 - connecting plate, 15 - let go of the sliding groove, 16 - slide rail, 17 - connecting block, 18 - second servo motor, 19 - second lead screw, 20 - second sliding block, 21 - sliding sleeve, 22 - second limit sliding block, 23 - second limit sliding groove, 24 - let go of the slot, 25 - rotating joint, 26 - one-way oil pipe, 27 - oil injection joint, 28 - second oil pipe, 29 - access hole, 30 - spline sleeve, 31 - driven wheel, 32 - fixed sleeve, 33 - main shaft motor, 35 - synchronous belt, 36 - one-way side piece, 37 - second side piece. DETAILED DESCRIPTION

[0024] The utility model will be further described below in combination with the drawings and examples, but not as the basis for limiting the utility model.

[0025] Example. A high stability servo cutter head, constitute as shown in Figs. 1 to 4 The mounting seat 1 is provided with a cutter at one end, and the other end of the mounting seat 1 is provided with a sleeve 2, and the mounting seat 1 and the sleeve 2 are connected with a fixed frame 3; The telescopic cylinder 4 is slidably provided in the mounting seat 1, and the telescopic cylinder 4 is connected with an axial telescopic drive part fixed on the mounting seat 1 for driving the telescopic cylinder 4 to slide relative to the mounting seat 1; The rotating main shaft 5 is rotatably connected in the telescopic cylinder 4, and one end of the rotating main shaft 5 is connected with the cutter, and the other end of the rotating main shaft 5 is rotatably connected with the sliding sleeve 6; The sliding sleeve 6 is slidably arranged in the sleeve 2, and the sleeve 2 is provided with an axial one-way limit sliding groove 7, and the one-way limit sliding groove 7 is provided with a one-way limit sliding block 8 connected with the sliding sleeve 6; The one end of the rotating main shaft 5 is connected with the cutter, and the other end of the rotating main shaft 5 is rotatably connected with the sliding sleeve 6; The sliding sleeve 6 is slidably arranged in the sleeve 2, and the sleeve 2 is provided with an axial one-way limit sliding groove 7, and the one-way limit sliding groove 7 is provided with a one-way limit sliding block 8 connected with the sliding sleeve 6; The rotating main shaft 5 is provided with a push-pull rod 10, one end of the push-pull rod 10 is connected with the cutter, and the other end of the push-pull rod 10 is connected with a stretching drive part fixed on the sliding sleeve 6 for driving the push-pull rod 10; The rotating main shaft 5 is connected with a drive part fixed on the fixed frame 3 for driving the rotating main shaft 5 to rotate through the spline structure.

[0026] The axial telescopic drive part includes a No. 1 servo motor 11 fixed on the mounting base 1 and arranged axially along the telescopic cylinder 4, a No. 1 lead screw 12 connected to the output shaft of the No. 1 servo motor 11, a No. 1 sliding block 13 threadedly sleeved with the No. 1 lead screw 12, and a connecting plate 14 fixedly connected between the No. 1 sliding block 13 and the telescopic cylinder 4; the mounting base 1 is provided with a displacement sliding groove 15 corresponding to the movement path of the connecting plate 14; the mounting base 1 is provided with sliding rails 16 arranged axially along the telescopic cylinder 4 on both sides corresponding to the connecting plate 14, and both sliding rails 16 are slidingly connected with connecting blocks 17 fixed on both sides of the connecting plate 14; the stretching drive part includes a No. 2 servo motor 18 fixed on the end of the sliding sleeve 6 and arranged axially along the sleeve 2; a No. 2 lead screw 19 connected to the output shaft of the No. 2 servo motor 18, a No. 2 sliding block 20 threadedly connected with the No. 2 lead screw 19, a sliding sleeve 21 slidingly arranged in the sliding sleeve 6 and connected to the No. 2 sliding block 20, the sliding sleeve 21 being rotationally connected to the outside of the end of the push-pull rod 10, and a No. 2 limiting sliding block 22 radially extending outward and slidingly arranged in the No. 1 limiting sliding groove 7 and connected to the sliding sleeve 21; the sliding sleeve 6 is provided with a No. 2 limiting sliding groove 23 corresponding to the movement path of the No. 2 limiting sliding block 22; the sliding sleeve 21 is provided with a displacement groove 24 communicating with the No. 2 limiting sliding groove 23 and the No. 1 limiting sliding groove 7; the push-pull rod 10 is hollowly arranged, one end of the push-pull rod 10 corresponding to the rotationally sleeved sliding sleeve 21 is connected with a No. 1 oil injection pipe 26 through a rotary joint 25, and the end of the No. 1 oil injection pipe 26 extends outwardly and is arranged through the displacement groove 24, the No. 1 limiting sliding groove 7 and the No. 2 limiting sliding groove 23; one end of the No. 2 servo motor 18 connected to the sliding sleeve 6 extends outwardly and is arranged in the sleeve 2; one side of the No. 2 sliding block 20 is connected with a No. 2 oil injection pipe 28 through an oil injection joint 27, and the end of the No. 2 oil injection pipe 28 extends outwardly from the surface of the end of the No. 2 servo motor 18 connected to the sliding sleeve 6; the side surface of the sliding sleeve 6 corresponding to the oil injection joint 27 is provided with an inspection opening 29; the drive part includes a spline sleeve 30 fitted on the spline outside of the rotary main shaft 5, one end of the spline sleeve 30 is provided with a No. 1 side piece 36 extending radially outward, a driven wheel 31 is fixedly sleeved on the No. 1 side piece 36 outside the spline sleeve 30; a fixed sleeve 32 is arranged between the spline sleeve 30 and the driven wheel 31, the fixed sleeve 32 is provided with a No. 2 side piece 37 extending radially outward on the other end opposite to the No. 1 side piece 36, the No. 2 side piece 37 is fixedly connected with the mounting base 1, and the fixed sleeve 32 is rotationally connected with the driven wheel 31 through a bearing; one side of the driven wheel 31 is provided with a main shaft motor 33 fixedly connected to the fixed frame 3, the output shaft of the main shaft motor 33 is connected with a driving wheel rotationally connected to the fixed frame 3, and the driving wheel and the driven wheel 31 are connected with a synchronous belt 35 located in the fixed frame 3.

[0027] Working principle: the main shaft motor 33 on the fixed frame 3 rotates to drive the driven wheel 31 to rotate through the driving wheel and the synchronous belt 35, and drive the spline sleeve 30 to rotate through the fixed connection of the No. 1 side piece 36 with the driven wheel 31. Because the spline sleeve 30 is matched with the spline outside of the rotating main shaft 5, the spline sleeve 30 can drive the rotating main shaft 5 to rotate synchronously after rotating, and drive the rotating cutter connected to the end of the rotating main shaft 5 to rotate. At the same time, because the fixed sleeve 32 is arranged between the spline sleeve 30 and the driven wheel 31, the No. 2 side piece 37 is connected between one end of the fixed sleeve 32 and the mounting base 1, and the fixed sleeve 32 and the driven wheel 31 are connected through bearings, so that the driven wheel 31 and the spline sleeve 30 can keep stable when rotating, and the stability during operation is stronger.

[0028] When the No. 1 servo motor 11 on the mounting base 1 drives the No. 1 lead screw 12 to rotate, it can drive the No. 1 sliding block 13 threaded on the No. 1 lead screw 12 to drive the telescopic cylinder 4 to move axially relative to the mounting base 1 through the connecting plate 14. Because the connecting plate 14 is slidingly limited in the accommodation sliding groove 15, and the connecting blocks 17 connected on both sides of the connecting plate 14 are respectively matched with the slidingly connected sliding rails 16 on both sides, the connecting plate 14 can stably drive the telescopic cylinder 4 to move axially. Because the rotating main shaft 5 is rotatably clamped in the telescopic cylinder 4, the telescopic cylinder 4 can drive the rotating main shaft 5 to move axially synchronously when moving axially, so as to drive the rotating cutter at the end of the rotating main shaft 5 to feed or retreat. The sliding sleeve 6 rotatably clamped on the rotating main shaft 5 can also move axially in the sleeve 2. Because the sleeve 2 is wrapped outside the sliding sleeve 6, and the sliding sleeve 2 is connected with the No. 1 limiting sliding block 8 extending radially outward, and the sleeve 2 is provided with the No. 1 limiting sliding groove 7 axially arranged and slidingly matched with the No. 1 limiting sliding block 8, the stability of the sliding sleeve 6 relative to the sleeve 2 when moving axially is also higher, and vibration in the traditional cutter power head is not easy to occur.

[0029] When the No. 2 servo motor 18 at the end of the sliding sleeve 6 drives the No. 2 lead screw 19 to rotate, it can drive the No. 2 sliding block 20 threaded on the No. 2 lead screw 19 to move axially, and the sliding sleeve 21 connected to the No. 2 sliding block 20 can move axially relative to the sliding sleeve 6. Because the sliding sleeve 21 is connected with the No. 2 limiting sliding block 22 extending radially outward, the sliding sleeve 6 is provided with the No. 2 limiting sliding groove 23 axially arranged at the position corresponding to the No. 2 limiting sliding block 22, and the No. 2 limiting sliding block 22 can slide on the No. 1 limiting sliding groove 7 and the No. 2 limiting sliding groove 23, so that the sliding sleeve 21 can stably move axially, thereby driving the push-pull rod 10 to stably move axially and driving the cutter to move radially.

[0030] The first oil injection pipe 26 can pass through the first limiting sliding groove 7, the second limiting sliding groove 23, the accommodation slot 24 on the sliding sleeve 21 and then be connected with the end of the push-pull rod 10 through the rotary joint 25, so that the lubricating oil is injected into the spreader through the hollow push-pull rod 10 for lubrication, and the lubrication operation is more convenient. The second oil injection pipe 28 can pass through the end face of the sliding sleeve 6 connected with the second servo motor 18 and extend into the sliding sleeve 6, and be connected with the second sliding block 20 through the oil injection joint 27, so that when the sliding sleeve 6 moves axially relative to the sliding sleeve 21, the second oil injection pipe 28 is not easily affected, lubrication of the second lead screw 19 and the second sliding block 20 in the sliding sleeve 6 is facilitated, and the end of the sliding sleeve 6 connected with the second servo motor 18 extends out of the sleeve 2 and is provided with the maintenance opening 29 corresponding to the oil injection joint 27 on the side surface of the end, so that the maintenance operation of the oil injection joint 27 is facilitated. When the spreader is connected with the clamp for clamping the parts for machining, the splashed cooling liquid can be blocked by the end cover 9, so as not to enter between the telescopic cylinder 4 and the rotary main shaft 5, and the running stability is ensured.

Claims

1. A high stability servo cutter head, characterized by: The utility model provides an extendable and retractable rotary cutter, which comprises a mounting base (1), one end of the mounting base (1) is provided with an expander, the other end of the mounting base (1) is provided with a sleeve (2), a fixing frame (3) is connected between the mounting base (1) and the sleeve (2); a telescopic cylinder (4) is slidably sleeved in the mounting base (1), an axial telescopic driving part for driving the telescopic cylinder (4) to slide relative to the mounting base (1) is connected to the telescopic cylinder (4) and fixed on the mounting base (1); a rotating main shaft (5) with two ends extending out of the telescopic cylinder (4) is rotatably clamped in the telescopic cylinder (4), one end of the rotating main shaft (5) is connected with the expander, and the other end of the rotating main shaft (5) is rotatably clamped with a sliding sleeve (6); the sliding sleeve (6) is slidably arranged in the sleeve (2), one side of the sleeve (2) is provided with an axial first limiting sliding groove (7), a first limiting sliding block (8) connected to the sliding sleeve (6) is limitingly and slidably arranged in the first limiting sliding groove (7); one end of the expander is sealingly connected with a sealing cover arranged outside the end of the telescopic cylinder (4), and the sealing cover is a head (9); a push-pull rod (10) is arranged in the rotating main shaft (5), one end of the push-pull rod (10) is connected with the expander, the other end of the push-pull rod (10) is connected with a stretching driving part for driving the push-pull rod (10) and fixed on the sliding sleeve (6); the rotating main shaft (5) is connected with a driving part for driving the rotating main shaft (5) to rotate through a spline structure and fixed on the fixing frame (3).

2. A high-stability servo cutter head according to claim 1, characterized in that: The axial telescopic driving part comprises a first servo motor (11) fixed on the mounting base (1) and arranged along the axis of the telescopic cylinder (4), a first screw rod (12) connected to the output shaft of the first servo motor (11), a first sliding block (13) threadedly sleeved outside the first screw rod (12), and a connecting plate (14) fixedly connected between the first sliding block (13) and the telescopic cylinder (4); the mounting base (1) is provided with a displacement sliding groove (15) corresponding to the movement path of the connecting plate (14).

3. A high stability servo cutter head as claimed in claim 2, characterized in that: The mounting base (1) is provided with sliding rails (16) arranged along the axis of the telescopic cylinder (4) on both sides of the connecting plate (14), and a connecting block (17) fixed on both sides of the connecting plate (14) is slidably connected to the two sliding rails (16).

4. The high-stability servo cutter head of claim 1, wherein: The stretching driving part comprises a second servo motor (18) fixed on the end of the sliding sleeve (6) and arranged along the axis of the sleeve (2), a second screw rod (19) connected to the output shaft of the second servo motor (18), a second sliding block (20) threadedly connected outside the second screw rod (19), a sliding sleeve (21) slidably arranged in the sliding sleeve (6) and connected to the second sliding block (20), the sliding sleeve (21) rotatably clamped outside the end of the push-pull rod (10), a second limiting sliding block (22) radially and outwardly extending and limitingly and slidably arranged in the first limiting sliding groove (7) and connected to the sliding sleeve (21), and a second limiting sliding groove (23) provided on the sliding sleeve (6) and corresponding to the movement path of the second limiting sliding block (22).

5. A high stability servo cutter head as claimed in claim 4, characterized in that: The sliding sleeve (21) is provided with a let go slot (24) communicated with the second limiting sliding groove (23) and the first limiting sliding groove (7); the push-pull rod (10) is hollowly arranged, one end of the push-pull rod (10) with the sliding sleeve (21) rotatably connected is connected with the first oil injection pipe (26) through the rotary joint (25), and the end of the first oil injection pipe (26) is outwardly arranged through the let go slot (24), the first limiting sliding groove (7) and the second limiting sliding groove (23).

6. A high stability servo cutter head as claimed in claim 4, wherein: One end of the second servo motor (18) connected with the sliding sleeve (6) is arranged in the form of extending the sleeve (2); one side of the second sliding block (20) is connected with the second oil injection pipe (28) through the oil injection joint (27), and the end of the second oil injection pipe (28) is arranged outward from the end face of the one end of the second servo motor (18) connected with the sliding sleeve (6).

7. A high stability servo cutter head as claimed in claim 6, characterized in that: The sliding sleeve (6) is provided with the maintenance opening (29) on the side face corresponding to the oil injection joint (27).

8. The high stability servo cutter head of claim 1 wherein: The driving part comprises the spline sleeve (30) fitted on the spline outside of the rotating main shaft (5), the spline sleeve (30) is provided with the first side piece (36) extending radially outward at one end, the spline sleeve (30) is provided with the driven wheel (31) fixed on the first side piece (36) at intervals; the interval between the driven wheel (31) and the spline sleeve (30) is provided with the fixing sleeve (32), the fixing sleeve (32) is provided with the second side piece (37) extending radially outward at the other end opposite to the first side piece (36), the second side piece (37) is fixedly connected with the mounting base (1), the fixing sleeve (32) and the driven wheel (31) are rotatably connected through the bearing; one side of the driven wheel (31) is provided with the main shaft motor (33) fixedly connected with the fixing frame (3), the output shaft of the main shaft motor (33) is connected with the driving wheel rotatably connected with the fixing frame (3), and the synchronous belt (35) in the fixing frame (3) is connected between the driving wheel and the driven wheel (31).

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