Oscillating head capable of continuously indexing, locking and positioning and machine tool with oscillating head

Abstract

The invention relates to the technical field of numerical control machine tools, in particular to a swing head capable of achieving continuous indexing, locking and positioning and a machine tool with the swing head. The swing head comprises a rotating shaft unit driven by a torque motor unit in a box shell unit, and the rotating shaft unit is provided with an outer friction plate rotating along with the rotating shaft unit through a first limiting disc; the box body shell unit is provided with inner friction plates arranged alternately with the outer friction plates, the box body shell unit is further provided with a piston matched with the inner friction plates through an oil cylinder groove, and a disc spring is arranged between the piston and the side wall, away from the first limiting disc, of the oil cylinder groove. The invention further discloses a machine tool with the swing head. The positioning device is compact in structure, high in positioning precision and capable of locking and positioning at any angle.

Description

Technical Field

[0001] The invention relates to the technical field of numerically controlled machine tools, and in particular to a swing head capable of continuous indexing, locking and positioning, and a machine tool having the swing head. Background Art

[0002] The swing head is the core functional component of the five-axis linkage machining center, which directly determines the performance level of this type of machining center. At present, the domestic ones are generally designed and manufactured by the host manufacturers themselves or purchased from abroad. The positioning methods of the swing head are mostly worm gear, gear rack or three-toothed disc positioning. These positioning methods are difficult to take into account the positioning accuracy, positioning rigidity and structural compactness. Summary of the invention

[0003] In order to solve the defects in the prior art, the present invention provides a swing head capable of continuous indexing, locking and positioning and a machine tool having the swing head, which is specifically achieved through the following technical solutions: A swing head that can be continuously indexed, locked and positioned comprises a rotating shaft unit driven by a torque motor unit installed in a housing unit, a first end of the rotating shaft unit is fixedly mounted with a first limit plate, a side of the first limit plate facing the housing unit is mounted with a plurality of outer friction plates, the plurality of outer friction plates rotate with the rotating shaft unit, a side of the housing unit facing the first limit plate is mounted with a plurality of inner friction plates; the plurality of inner friction plates and the outer friction plates are alternately arranged with clearance fit; a cylinder groove is arranged on the side of the housing unit facing the first limit plate, a piston is slidably mounted in the cylinder groove, the piston can lock the inner friction plates and the outer friction plates with each other, and a disc spring is installed between the piston and the side wall of the cylinder groove away from the first limit plate.

[0004] A number of fifth screws are installed in a circular array on the first limiting plate, and the number of fifth screws are sequentially penetrated through the first distance ring and a number of outer friction plates and then threadedly connected to the first mounting ring, and the first mounting ring is clearance-matched with the box shell unit; a second distance ring is sleeved inside the first distance ring, and a number of third screws are installed in a circular array on the second distance ring, and the number of third screws are sequentially penetrated through a number of inner friction plates and the second mounting ring and then threadedly connected to the box shell unit.

[0005] The piston includes a piston head slidably installed in the cylinder groove, and a piston rod is fixedly installed on the side of the piston head facing the first limit plate; the inner diameter of the piston rod is equal to the outer diameter of the second mounting ring; the piston rod and the second mounting ring are slidably matched; the disc spring is installed between the piston head and the side wall of the cylinder groove away from the first limit plate.

[0006] The end of the piston head away from the first limit plate is provided with a plurality of internal threaded blind holes in a circular array, each of the internal threaded blind holes is installed with a guide stud, the cylinder groove is provided with a spring groove corresponding to the internal threaded blind holes one by one, the second end of the guide stud extends into the spring groove, the disc spring is sleeved on the guide stud, the first end of the disc spring abuts the piston head, and the second end abuts the side wall of the spring groove away from the piston head.

[0007] An outer spacer ring is installed between two adjacent outer friction plates, and an inner spacer ring is installed between two adjacent inner friction plates and between the inner friction plate and the second distance ring. The outer friction plates and the inner friction plates are clearance-matched during the rotation of the rotating shaft unit; the fifth screw passes through the outer spacer ring, and the third screw passes through the inner spacer ring.

[0008] The inner diameter of the outer friction plate is smaller than the outer diameter of the inner friction plate, the outer diameter of the inner spacer ring is smaller than the outer diameter of the inner friction plate, and the inner diameter of the outer spacer ring is larger than the outer diameter of the inner friction plate.

[0009] A magnetic scale disk is detachably mounted on the second end of the rotating shaft unit, and a reading head matching the magnetic scale disk is mounted on the housing unit.

[0010] A second pressurized chamber is formed between the end of the piston head away from the first limiting plate and the cylinder groove, and a first pressurized chamber is formed between the end of the piston head close to the first limiting plate and the second mounting ring; the first pressurized chamber is connected to the first oil inlet on the box shell unit, and the second pressurized chamber is connected to the second oil inlet on the box shell unit.

[0011] The rotating shaft unit is provided with a first center hole, in which a cylinder is installed, a second limit plate is fixedly installed on the second end of the cylinder, and the second limit plate is detachably connected to the box shell unit through a connecting plate unit, and a plurality of second oil circuits are provided on the cylinder in a ring array; a plurality of third oil circuits corresponding one-to-one to the second oil circuits are provided on the second limit plate, and the third oil circuits are connected with the corresponding second oil circuits; a second annular oil groove corresponding one-to-one to the second oil circuits is provided on the outer wall of the cylinder, and the second annular oil groove is connected with the corresponding second oil circuit, a plurality of first annular oil grooves are provided on the inner wall of the first center hole, and the first annular oil grooves correspond one-to-one to the second annular oil grooves, and the rotating shaft unit is provided with a first oil circuit corresponding one-to-one to the first annular oil groove, and the first oil circuit is connected with the corresponding first annular oil groove.

[0012] A machine tool comprises the aforementioned swing head capable of continuous indexing, locking and positioning.

[0013] The present invention has the following technical effects: The present invention has a compact structure and high positioning accuracy, and can provide sufficient torsional force and high dynamic characteristics to the main shaft, thereby ensuring the differential compensation processing accuracy of the swing head; the rotating shaft unit can be locked and positioned at any angle, and the locking method adopts a locking and positioning method in which an annular piston squeezes the friction plate, which has high positioning accuracy and can provide higher cutting rigidity after locking and positioning; a disc spring auxiliary locking design is adopted to ensure that the swing head can still rely on the locking force of the disc spring to lock the rotating shaft unit when a machine tool fails and causes power failure or oil pressure failure; the rotating shaft unit adopts an internal cooling cooling method; the structure of the magnetic scale disc and the reading head cooperating with each other ensures the high dynamic characteristics and high positioning accuracy of the swing head. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 The structure of the present invention is schematically shown Figure 1 ; Figure 2 The structure of the present invention is schematically shown Figure 2 ; Figure 3 The structure of the present invention is schematically shown Figure 3 ; Figure 4 The structure of the present invention is schematically shown Figure 4 ; Figure 5 for Figure 4 Schematic cross-section of the middle BB; Figure 6 for Figure 5 A partial enlarged view of point C in the middle; Figure 7 Schematic diagram of the cooperation between the outer friction plate and the inner friction plate; Figure 8 for Figure 3 Schematic diagram of the cross section of AA; Fig. 9 for Figure 8 A partial enlarged view of point D in the middle; Fig.10 It is a schematic diagram of the matching relationship between the piston and the cylinder groove; Fig.11 Schematic diagram of the structure of the rotating shaft unit Figure 1 ; Fig.12 Schematic diagram of the structure of the rotating shaft unit Figure 2 ; Fig.13 for Fig.12 Schematic cross-section of the EE; Fig.14 Schematic diagram of the angle measurement unit Figure 1 ; Fig.15 Schematic diagram of the angle measurement unit Figure 2 ; Fig.16 It is a schematic diagram of the cross-sectional structure of the oil distributor unit; Fig.17 for Fig.16 A partial enlarged view of point F in the middle; Fig.18 It is a schematic diagram of the structure of the connecting disk unit.

[0016] In the figure: 10-rotating shaft unit, 101-first limiting plate, 102-fifth screw, 103-connecting seat, 104-first center hole, 105-first oil passage, 106-first annular oil groove, 107-skeleton sealing ring, 108-connecting cavity, 109-shaft body; 20-angle measuring unit, 201-reading head bracket, 202-reading head, 203-magnetic scale plate, 204-mounting plate, 205-first screw, 206-fifth bolt; 30-YRT turntable bearing unit, 301-second screw; 40-oil distributor unit, 401-second center hole, 402-cylinder, 403-second oil passage, 404-third oil passage, 405-second annular oil groove, 406-second limiting plate, 407-connecting hole; 50-connecting plate unit, 501-bearing cover, 502-fourth screw, 503-flange cover, 504-second bearing; 60-box housing unit, 601-first ring groove, 602-second ring groove, 603-first sealing ring, 604-cylinder groove, 605-spring groove; 70-friction clamping unit, 701-first distance ring, 702-outer friction plate, 703-first mounting ring, 704-limiting ring, 705-disc spring, 706-piston, 70601-piston head, 70602-inner threaded blind hole, 70603-guide stud, 70604-piston rod, 707-inner ring groove, 708-second sealing ring, 709-first pressurizing chamber, 7010-second outer ring groove, 7011-fourth sealing ring, 7012-fifth sealing ring, 7013-second mounting ring, 7014-inner friction plate, 7015-second distance ring, 7016-inner spacer ring, 7017-outer spacer ring, 7018-third screw; 80-Torque motor unit. DETAILED DESCRIPTION

[0017] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the modules or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0019] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0020] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0021] As attached Figure 1 To Attachment Figure 4 As shown, the present invention provides a swing head that can be continuously indexed, locked and positioned, including a box shell unit 60, in which a rotatable rotating shaft unit 10 is installed, and both ends of the rotating shaft unit 10 extend outside the box shell unit 60, wherein the first end of the rotating shaft unit 10 is used to install a main shaft or other working end and drive it to rotate.

[0022] The connection disk unit 50 is detachably mounted on the second end of the box housing unit 60 .

[0023] The second end of the rotating shaft unit 10 extends to the connecting disk unit 50 and is rotatably matched with the connecting disk unit 50 .

[0024] An angle measuring unit 20 is detachably mounted on the second end of the housing unit 60 . The angle measuring unit 20 matches the second end of the rotating shaft unit 10 and is used to detect the angle through which the rotating shaft unit 10 rotates.

[0025] In this embodiment, the rotating shaft unit 10 is a hollow structure, that is, a first central hole 104 opened along the axial direction of the rotating shaft unit 10 is provided at the central position of the rotating shaft unit 10 .

[0026] As attached Figure 2 and attached Figure 4 As shown, the connecting plate unit 50 is also detachably connected to the second end of the oil distributor unit 40, and the second end of the oil distributor unit 40 extends into the first central hole 104 of the rotating shaft unit 10 and is rotatably matched with the rotating shaft unit 10. The oil distributor unit 40 is used to pass cooling oil to the rotating shaft unit 10 and the working end mounted on the rotating shaft unit 10.

[0027] The specific structure of the swing head that can be continuously indexed and locked is shown in the attached Figure 5 To Attachment Fig. 9 As shown, a torque motor unit 80 is fixedly installed inside the box shell unit 60, and the rotating shaft unit 10 is installed at the center position of the torque motor unit 80 through a third bolt, that is, the axis of the rotating shaft unit 10 coincides with the bearing of the torque motor unit 80, and the rotating shaft unit 10 passes through the rotor of the torque motor unit 80 and is connected to the rotor through a first bolt.

[0028] The housing unit 60 is a hollow structure, with an inner edge at the first end and an outer edge at the second end, and the inner edge extends toward the rotating shaft unit 10. The connecting plate unit 50 is detachably connected to the outer edge.

[0029] A YRT turntable bearing unit 30 is detachably mounted on the side of the inner edge facing the outer edge, and the YRT turntable bearing unit 30 is rotationally matched with the rotating shaft unit 10. Specifically, the outer ring of the YRT turntable bearing unit 30 is connected to the inner edge by a second bolt, and the inner ring is connected to the rotating shaft unit 10 by a second screw 301. By adopting the YRT turntable bearing unit 30, the rotating cooperation between the rotating shaft unit 10 and the housing unit 60 is achieved; at the same time, the YRT turntable bearing unit 30 can also maintain the stable operation of the rotating shaft unit 10.

[0030] The structure of the aforementioned rotating shaft unit 10 is shown in the attached Fig.11 and attached Fig.12 As shown, a shaft body 109 is included, and the shaft body 109 is connected to the rotor of the torque motor unit 80 via a first bolt.

[0031] The second end of the shaft 109 is rotatably engaged with the connecting disk unit 50 .

[0032] The first end of the shaft body 109 is fixedly installed with a connecting seat 103 and a first limiting plate 101 in sequence, wherein the connecting seat 103 is located at the end of the first end of the shaft body 109, the first limiting plate 101 is located on the side of the connecting seat 103 close to the second end of the shaft body 109, and a gap is left between the connecting seat 103 and the first limiting plate 101.

[0033] The connecting seat 103 is used to connect the main shaft or other working ends through the fourth bolt.

[0034] As attached Figure 5 , Attachment Figure 6 and attached Fig.11 As shown, the diameter of the first limiting plate 101 is greater than the diameter of the connecting seat 103 .

[0035] A friction clamping unit 70 is installed between the first limiting plate 101 and the inner edge, and the friction clamping unit 70 can limit the position of the rotating shaft unit 10 .

[0036] The structure of the friction clamping unit 70 is shown in the attached Figure 5 To Attachment Fig. 9 As shown, a plurality of fifth screws 102 are installed on the first limiting plate 101, and the plurality of fifth screws 102 are arranged in a circumferential array. All the fifth screws 102 pass through the first distance ring 701 and the plurality of outer friction plates 702 in sequence, and are threadedly connected with the first mounting ring 703, so as to achieve fixed installation among the first limiting plate 101, the first distance ring 701, the plurality of outer friction plates 702, and the first mounting ring 703. The first mounting ring 703 is in clearance with the inner edge.

[0037] A second distance ring 7015 is sleeved inside the first distance ring 701, and the second distance ring 7015 is loosely matched with the first distance ring 701. The second distance ring 7015 is located between the first distance ring 701 and the inner edge.

[0038] A plurality of third screws 7018 are installed in a circumferential array on the second distance ring 7015, and all the third screws 7018 sequentially penetrate through the plurality of inner friction plates 7014 and the second mounting ring 7013, and are connected with the inner edge thread, thereby achieving fixation between the inner edge, the second mounting ring 7013, the plurality of inner friction plates 7014, and the second distance ring 7015. The second mounting ring 7013, the inner friction plates 7014, the second distance ring 7015, and the rotating shaft unit 10 are all clearance-fitted.

[0039] The inner friction plates 7014 and the outer friction plates 702 are arranged alternately. Figure 7As shown, the outer diameter of the outer friction plate 702 is greater than the outer diameter of the inner friction plate 7014, the outer diameter of the inner friction plate 7014 is greater than the inner diameter of the outer friction plate 702, the inner diameter of the outer friction plate 702 is greater than the inner diameter of the inner friction plate 7014, and the inner diameter of the outer friction plate 702 is smaller than the outer diameter of the inner friction plate 7014. An outer spacing ring 7017 is installed between two adjacent outer friction plates 702, and an inner spacing ring 7016 is installed between two adjacent inner friction plates 7014. The fifth screw 102 passes through the plurality of outer spacing rings 7017 in sequence, and the third screw 7018 passes through the plurality of inner spacing rings 7016 in sequence.

[0040] The thickness of the inner spacer ring 7016 is greater than that of the outer friction plate 702 ; the thickness of the outer spacer ring 7017 is greater than that of the inner friction plate 7014 , so that the outer friction plate 702 and the inner friction plate 7014 are clearance-matched when the rotating shaft unit 10 rotates normally.

[0041] The outer diameter of the inner spacer ring 7016 is smaller than the outer diameter of the inner friction plate 7014 and also smaller than the inner diameter of the outer friction plate 702 ; the inner diameter of the outer spacer ring 7017 is larger than the outer diameter of the inner friction plate 7014 .

[0042] In this embodiment, there are three outer friction plates 702, three inner friction plates 7014, and three inner spacer rings 7016, and two outer spacer rings 7017; the two outer spacer rings 7017 are installed between adjacent outer friction plates 702; two of the three inner spacer rings 7016 are installed between adjacent inner friction plates 7014, and the other inner spacer ring 7016 is installed between the inner friction plate 7014 and the second distance ring 7015.

[0043] A piston 706 is installed on the side of the inner edge facing the first limiting plate 101 , which can abut against the inner friction plate 7014 so as to clamp the inner friction plate 7014 and the outer friction plate 702 . The piston 706 is annular.

[0044] The mounting structure of piston 706 is shown in the attached Figure 6 and attached Fig. 9 As shown, a cylinder groove 604 is provided on the inner edge facing the first limiting plate 101 . The cylinder groove 604 is also annular, and an annular piston 706 is slidably installed in the cylinder groove 604 .

[0045] As attached Figure 6 , Attachment Fig. 9 and attached Fig.10 As shown, the piston 706 includes a piston head 70601 sliding in the cylinder groove 604, and the piston head 70601 is annular, and its size matches the size of the cylinder groove 604, that is, the inner diameter of the cylinder groove 604 is equal to the inner diameter of the piston head 70601, and the outer diameter of the cylinder groove 604 is equal to the outer diameter of the piston head 70601.

[0046] A piston rod 70604 which is also annular is fixedly mounted on one side of the piston head 70601 facing the first limiting plate 101. The outer diameter of the piston rod 70604 is equal to the outer diameter of the piston head 70601. The inner diameter of the piston rod 70604 is greater than the outer diameter of the piston head 70601 and is equal to the outer diameter of the second mounting ring 7013. The piston rod 70604 is slidably matched with the second mounting ring 7013.

[0047] The inner diameter of the piston rod 70604 is larger than the inner diameter of the outer spacer ring 7017.

[0048] A second pressurizing chamber is formed between the end of the piston head 70601 away from the first limiting plate 101 and the cylinder groove 604, and a first pressurizing chamber 709 is formed between the end of the piston head 70601 close to the first limiting plate 101 and the second mounting ring 7013; the first pressurizing chamber 709 is connected to the first oil inlet provided on the box shell unit 60, and the second pressurizing chamber is connected to the second oil inlet provided on the box shell unit 60.

[0049] As attached Figure 6 and attached Fig.10 As shown, an inner ring groove 707 is opened on the inner ring wall of the piston head 70601, and a second sealing ring 708 is installed in the inner ring groove 707, and the second sealing ring 708 is abutted against the cylinder groove 604; a first outer ring groove is opened on the outer ring wall of the piston head 70601, and a third sealing ring is installed in the first outer ring groove, and the third sealing ring is abutted against the cylinder groove 604; the sealing of the second pressurizing chamber is ensured by arranging the second sealing ring 708 and the third sealing ring.

[0050] The outer ring wall of the second mounting ring 7013 is provided with a second outer ring groove 7010, in which a fifth sealing ring 7012 is installed to abut against the piston rod 70604, and a fourth sealing ring 7011 is installed between the second mounting ring 7013 and the inner edge. The fifth sealing ring 7012 and the fourth sealing ring 7011 are used to enhance the sealing performance of the first pressurizing chamber 709.

[0051] As attached Figure 6 , Attachment Fig. 9 and attached Fig.10 As shown, a plurality of internal threaded blind holes 70602 are arranged in a circular array at one end of the piston head 70601 away from the first limiting plate 101 , and each internal threaded blind hole 70602 is threadedly mounted with a guide stud 70603 , and the second end of the guide stud 70603 extends out of the internal threaded blind hole 70602 .

[0052] The oil cylinder groove 604 is provided with a spring groove 605 corresponding to the internal thread blind hole 70602 one by one, that is, the spring groove 605 is opened on the side wall of the oil cylinder groove 604 away from the first limiting plate 101.

[0053] The second end of the guide stud 70603 extends into the spring groove 605 , but a gap is left between the second end of the guide stud 70603 and the side wall of the spring groove 605 away from the piston head 70601 .

[0054] A disc spring 705 is sleeved on the guide stud 70603 , and a first end of the disc spring 705 abuts against the piston head 70601 , and a second end abuts against a side wall of the spring slot 605 away from the piston head 70601 .

[0055] During the normal rotation of the rotating shaft unit 10, hydraulic oil is introduced into the first pressurized chamber 709. The pressure of the hydraulic oil overcomes the elastic force of the disc spring 705, so that the piston rod 70604 does not contact the inner friction plate 7014. At this time, the inner friction plate 7014 and the outer friction plate 702 are clearance-matched, and the rotating shaft unit 10 can rotate freely.

[0056] When the angle measurement unit 20 detects that the rotation angle of the rotating shaft unit 10 reaches a preset value, the controller controls the torque motor unit 80 to stop and hydraulic oil is introduced into the second pressurizing chamber. The pressure of the hydraulic oil in the second pressurizing chamber and the elastic force of the disc spring 705 overcome the pressure of the hydraulic oil in the first pressurizing chamber 709, thereby pushing the piston rod 70604 to move toward the inner friction plate 7014, so that the inner friction plate 7014 and the outer friction plate 702 are squeezed and locked together, thereby realizing the precise positioning and locking of the rotating shaft unit 10.

[0057] Since the inner friction plate 7014, the outer friction plate 702, and the piston rod 70604 are all annular, and a plurality of disc springs 705 are arranged in a circular array, the inner friction plate 7014 and the outer friction plate 702 are evenly stressed when the rotating shaft unit 10 is stationary, and locking at any angle can be achieved.

[0058] If the hydraulic oil loses pressure during locking, the elastic force of the disc springs 705 is sufficient to cause the piston rod 70604 to press the inner friction plate 7014, so that the inner friction plate 7014 and the outer friction plate 702 are firmly squeezed together, so that the rotating shaft unit 10 remains in a locked state.

[0059] In order to prevent impurities from falling onto the outer friction plate 702 or the piston head 70601 from the gap between the first mounting ring 703 and the inner edge, a limiting ring 704 is fixedly mounted on one end of the first mounting ring 703 facing the inner edge, and a first ring groove 601 matching the limiting ring 704 is provided on the inner edge, and the limiting ring 704 extends into the first ring groove 601 and is gap-matched with the first ring groove 601. The first ring groove 601 is sleeved outside the oil cylinder groove 604, that is, the inner diameter of the first ring groove 601 is greater than the outer diameter of the oil cylinder groove 604.

[0060] By providing the first annular groove 601 and the limiting ring 704 , impurities such as dust in the air can be effectively prevented from directly entering the interior of the friction clamping unit 70 .

[0061] A second annular groove 602 is also formed on the inner edge, and the second annular groove 602 is located between the first annular groove 601 and the oil cylinder groove 604. A first sealing ring 603 is installed in the second annular groove 602, and the first sealing ring 603 abuts against the first mounting ring 703.

[0062] The structure of the aforementioned connection disk unit 50 is shown in the attached Fig.18 As shown, it includes a flange cover 503, a first end of which is fixedly mounted with an annular bearing cover 501, and the bearing cover 501 is connected to the outer edge and the torque motor unit 80 respectively through a fourth screw 502 and a fifth screw.

[0063] The second end of the shaft body 109 , ie, the end away from the first limiting plate 101 , extends into the flange cover 503 and is rotatably engaged with the flange cover 503 via a second bearing 504 .

[0064] The structure of the angle measuring unit 20 is shown in the attached figure. Fig.14 and attached Fig.15 As shown, it includes a reading head bracket 201 and an annular magnetic scale disk 203 . The magnetic scale disk 203 is sleeved on the second end of the shaft body 109 and connected to the shaft body 109 through a fifth bolt 206 .

[0065] The magnetic scale plate 203 is located in the flange cover 503 and is loosely matched with the flange cover 503 .

[0066] The first end of the reading head bracket 201 is mounted on the box housing unit 60 by means of a first screw 205 , and the second end extends into the flange cover 503 through the avoidance hole on the flange cover 503 .

[0067] A reading head 202 is mounted on the second end of the reading head bracket 201 through a sixth screw. The reading head 202 matches the magnetic scale disk 203 and is used to read the angle of rotation of the magnetic scale disk 203 .

[0068] A mounting plate 204 is also installed between the first end of the reading head bracket 201 and the box housing unit 60 , and a first screw 205 passes through the mounting plate 204 .

[0069] The structure of the aforementioned oil distributor unit 40 is shown in the attached Fig.16 and attached Fig.17 As shown, it includes a cylinder 402 with a second limiting plate 406 fixedly mounted on the second end, and a second center hole 401 is opened at the center position of the cylinder 402 along the axial direction thereof.

[0070] As attached Figure 2 As shown, the second limiting plate 406 is mounted on the end of the flange cover 503 away from the box shell unit 60 by a seventh screw.

[0071] The cylinder 402 extends into the first central hole 104 of the rotating shaft unit 10 .

[0072] A plurality of second oil passages 403 arranged in an annular array are provided in the cylinder wall of the cylinder 402, and a plurality of annular second annular oil grooves 405 are provided on the outer wall of the cylinder 402. The second annular oil grooves 405 correspond to the second oil passages 403 one by one. The second oil passages 403 are connected to the corresponding second annular oil grooves 405 through the connecting holes 407.

[0073] The second limiting plate 406 is provided with a plurality of third oil passages 404 corresponding to the second oil passages 403, and the third oil passages 404 are connected to the corresponding second oil passages 403. Each third oil passage 404 is provided with two inlets, one of which is located at an end of the second limiting plate 406 away from the cylinder 402, and the other is located on the side wall of the second limiting plate 406.

[0074] A plurality of first annular oil grooves 106 and sealing grooves are formed on the inner wall of the first central hole 104 of the rotating shaft unit 10 , and the first annular oil grooves 106 correspond to the second annular oil grooves 405 one by one.

[0075] The first annular oil groove 106 is located between two adjacent sealing grooves.

[0076] The first annular oil groove 106 cooperates with the second annular oil groove 405 to form an annular oil chamber.

[0077] A skeleton sealing ring 107 is installed in each sealing groove, and the skeleton sealing ring 107 abuts against the outer wall of the cylinder 402 .

[0078] Each first annular oil groove 106 is provided with a connecting cavity 108 .

[0079] As attached Fig.13 As shown, the rotating shaft unit 10 is further provided with a plurality of first oil passages 105, the number of which is consistent with the number of the first annular oil grooves 106 and corresponds one to one. The first oil passages 105 extend from the first end to the second end of the rotating shaft unit 10 and communicate with the corresponding connecting chambers 108.

[0080] During use, the cooling oil flows from the third oil circuit 404 into the second oil circuit 403, then passes through the connecting hole 407 into the oil chamber formed by the second annular oil groove 405 and the first annular oil groove 106, then enters the first oil circuit 105 through the connecting chamber 108, and finally flows into the working end, thereby cooling the rotating shaft unit 10, the torque motor unit 80 and the working end.

[0081] In this embodiment, the number of the second oil passages 403 is 12, and of course it can also be 11, 8, 15 or other numbers. These second oil passages 403 can be divided into two groups, one group is used as an oil inlet channel for introducing cooling oil into the rotating shaft unit 10 and the working end installed on the rotating shaft unit 10, and the other group is used as an oil return channel for the cooling oil to return from the working end installed on the rotating shaft unit 10; of course, all of them can also be used as oil inlet channels, that is, the cooling oil is finally directly sprayed out from the working end.

[0082] In this embodiment, the bolts and screws can be interchangeable, or both bolts or both screws can be used. The bolts are preferably hexagon socket bolts.

[0083] The angle measurement unit 20 in this embodiment may also be replaced by an encoder. However, since the rotating shaft unit 10 in this embodiment is a hollow structure, the encoder cannot be directly connected, which will affect the detection accuracy.

[0084] In this embodiment, these several small disc springs 705 can also be replaced with a whole large disc spring. In this case, the limiting structures such as the guide studs 70603 can be omitted. However, the whole large disc spring may rotate in the cylinder groove 604 during use, causing damage to the cylinder groove 604 and the piston 706.

[0085] The inner spacer ring 7016 and the outer spacer ring 7017 in this embodiment may also be replaced by gaskets and other components in the prior art, as long as the outer friction plate 702 and the inner friction plate 7014 are not locked with each other when the rotating shaft unit 10 rotates.

[0086] The present invention also provides a machine tool with a swing head capable of continuous indexing, locking and positioning. When in use, the housing shell unit 60 of the swing head capable of continuous indexing, locking and positioning is installed on a preset position such as a bed or a Z-axis slider, the oil circuit is connected, and the angle measurement unit 20 and the torque motor unit 80 are electrically connected to the controller. The controller controls the torque motor unit 80 to drive the rotating shaft unit 10 to rotate, and the angle measurement unit 20 detects the angle of rotation of the rotating shaft unit 10 in real time. When the angle of rotation of the rotating shaft unit 10 reaches a preset value, the controller controls the torque motor unit 80 to stop rotating, and the rotation shaft unit 10 is locked through the friction clamping unit 70.

[0087] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A swing head capable of continuous indexing, locking and positioning, characterized in that: The invention comprises a rotating shaft unit (10) driven by a torque motor unit (80) installed in a housing shell unit (60); a first limit plate (101) is fixedly installed on a first end of the rotating shaft unit (10); a plurality of outer friction plates (702) are installed on a side of the first limit plate (101) facing the housing shell unit (60); the plurality of outer friction plates (702) rotate with the rotating shaft unit (10); and a plurality of inner friction plates (7014) are installed on a side of the housing shell unit (60) facing the first limit plate (101). ; A plurality of inner friction plates (7014) and outer friction plates (702) are alternately arranged and clearance-matched; a cylinder groove (604) is provided on the side of the housing unit (60) facing the first limiting plate (101), a piston (706) is slidably installed in the cylinder groove (604), the piston (706) can lock the inner friction plates (7014) and the outer friction plates (702) with each other, and a disc spring (705) is installed between the piston (706) and the side wall of the cylinder groove (604) away from the first limiting plate (101).

2. The swing head capable of continuous indexing, locking and positioning according to claim 1, characterized in that: A plurality of fifth screws (102) are mounted on the first limiting plate (101) in a circumferential array, and the plurality of fifth screws (102) are sequentially passed through the first distance ring (701) and the plurality of outer friction plates (702) and then threadedly connected to the first mounting ring (703), and the first mounting ring (703) is clearance-matched with the housing shell unit (60); a second distance ring (7015) is sleeved inside the first distance ring (701), and a plurality of third screws (7018) are mounted on the second distance ring (7015) in a circumferential array, and the plurality of third screws (7018) are sequentially passed through the plurality of inner friction plates (7014) and the second mounting ring (7013) and then threadedly connected to the housing shell unit (60).

3. The swing head capable of continuous indexing, locking and positioning according to claim 2, characterized in that: The piston (706) comprises a piston head (70601) slidably mounted in the oil cylinder groove (604); a piston rod (70604) is fixedly mounted on the side of the piston head (70601) facing the first limiting plate (101); the inner diameter of the piston rod (70604) is equal to the outer diameter of the second mounting ring (7013); the piston rod (70604) and the second mounting ring (7013) are slidably matched; the disc spring (705) is mounted between the piston head (70601) and the side wall of the oil cylinder groove (604) away from the first limiting plate (101).

4. The swing head capable of continuous indexing, locking and positioning according to claim 3 is characterized in that: A plurality of internally threaded blind holes (70602) are arranged in a circular array at one end of the piston head (70601) away from the first limiting plate (101), and each of the internally threaded blind holes (70602) is installed with a guide stud (70603). The oil cylinder groove (604) is provided with a spring groove (605) corresponding to the internally threaded blind holes (70602) one by one. The second end of the guide stud (70603) extends into the spring groove (605), and the disc spring (705) is sleeved on the guide stud (70603). The first end of the disc spring (705) abuts against the piston head (70601), and the second end abuts against the side wall of the spring groove (605) away from the piston head (70601).

5. The swing head capable of continuous indexing, locking and positioning according to claim 2, characterized in that: An outer spacer ring (7017) is installed between two adjacent outer friction plates (702), and an inner spacer ring (7016) is installed between two adjacent inner friction plates (7014) and between the inner friction plate (7014) and the second distance ring (7015). The outer friction plates (702) and the inner friction plates (7014) are clearance-matched during the rotation of the rotating shaft unit (10); the fifth screw (102) passes through the outer spacer ring (7017), and the third screw (7018) passes through the inner spacer ring (7016).

6. The swing head capable of continuous indexing, locking and positioning according to claim 5, characterized in that: The inner diameter of the outer friction plate (702) is smaller than the outer diameter of the inner friction plate (7014), the outer diameter of the inner spacer ring (7016) is smaller than the outer diameter of the inner friction plate (7014), and the inner diameter of the outer spacer ring (7017) is larger than the outer diameter of the inner friction plate (7014).

7. The swing head capable of continuous indexing, locking and positioning according to any one of claims 1 to 6, characterized in that: A magnetic scale disk (203) is detachably mounted on the second end of the rotating shaft unit (10), and a reading head (202) matching the magnetic scale disk (203) is mounted on the housing unit (60).

8. The swing head capable of continuous indexing, locking and positioning according to claim 3 or 4, characterized in that: A second pressurizing chamber is formed between the end of the piston head (70601) away from the first limiting plate (101) and the oil cylinder groove (604), and a first pressurizing chamber (709) is formed between the end of the piston head (70601) close to the first limiting plate (101) and the second mounting ring (7013); the first pressurizing chamber (709) is communicated with the first oil inlet on the housing shell unit (60), and the second pressurizing chamber is communicated with the second oil inlet on the housing shell unit (60).

9. The swing head capable of continuous indexing, locking and positioning according to claim 1, characterized in that: The rotating shaft unit (10) is provided with a first central hole (104), a cylinder (402) is installed in the first central hole (104), a second limiting plate (406) is fixedly installed on the second end of the cylinder (402), the second limiting plate (406) is detachably connected to the housing unit (60) via a connecting plate unit (50), a plurality of second oil passages (403) are provided on the cylinder (402) in a circular array; a plurality of third oil passages (404) corresponding to the second oil passages (403) are provided on the second limiting plate (406), the third oil passages (404) and the corresponding second oil passages ( 403); a second annular oil groove (405) corresponding one-to-one to the second oil path (403) is formed on the outer wall of the cylinder (402), and the second annular oil groove (405) is connected to the corresponding second oil path (403); a plurality of first annular oil grooves (106) are formed on the inner wall of the first center hole (104), and the first annular oil grooves (106) correspond one-to-one to the second annular oil grooves (405); the rotating shaft unit (10) is formed with a first oil path (105) corresponding one-to-one to the first annular oil grooves (106), and the first oil path (105) is connected to the corresponding first annular oil groove (106).

10. A machine tool, characterized in that: The machine tool has a swing head capable of continuous indexing, locking and positioning as described in any one of claims 1 to 9.

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