KR102565088B1 - Universal head unit for machine tools with speed control - Google Patents

Abstract

The present invention is coupled to the control body portion, the main shaft is rotatably coupled therein, the main drive unit is composed of a main sensor member for detecting the rotation angle of the upper head in the front portion; an upper head coupled to a front part of the main drive unit, having a sub shaft connected to the main shaft, and having a sub sensor member configured therein to detect a rotation angle of the lower head; a lower head having a spindle connected to the sub shaft to be rotatably coupled to the upper head; a control body connected to the main shaft and configured to receive rotation angle information of the upper head transmitted from the main sensor member in real time and control whether or not the main shaft rotates and the number of rotations; and a controller configured to control the rotation of the main shaft by receiving rotation angle information of the upper and lower heads from the main sensor member and the sub sensor member. will be.

Description

Universal head unit for machine tools with speed control

The present invention relates to a universal head unit for a machine tool equipped with a rotational speed control device. More specifically, it relates to a universal head unit for a machine tool equipped with a rotational speed control device for easily and precisely controlling the angle of a main shaft when adjusting the angle of a tool for processing a workpiece.

Machine tools including, for example, turning centers, machining centers, Swiss turns, electrical discharge machines, boring machines, or CNC lathes refer to machines for processing workpieces. It cuts, cuts, or grinds workpieces using tools such as milling cutters, bits, or drills.

Accordingly, machine tools are equipped with and operated with universal head units for processing workpieces into various shapes in various spaces and angles.

The universal head unit for a machine tool is a kind of tool mount on which a tool is mounted, and is mounted on a machine tool using an attachment including a saddle. movement is possible

For example, Korean Patent Registration No. 10-1237779 discloses a support 10 having a shaft 11 installed therein; an upper head 20 rotatably mounted on the support 10 about a first axis; a lower head 30 rotatably mounted to the upper head 20 about a second axis; a spindle 40 installed inside the lower head 30 and rotated about a third axis by power transmission of the shaft 11; a first movable unit (61, 62) which rotates the upper head (20) about a first axis according to the rotational drive of the shaft (11); and a second movable unit (71) for rotating the lower head (30) about the second shaft according to the rotational drive of the shaft (11). there is a bar

However, the above-described swinging head for a machine tool according to the prior art is installed between the support 10 and the upper head 20, and the upper head 20 rotates according to the linear movement of the upper head 20. is installed between the first coupling 81 and the upper head 20 and the lower head 30, which restrain or release the lower head 30 according to the linear movement of the lower head 30 A second coupling 82 for restraining or releasing the rotation of is further configured, which is that the first and second couplings 81 and 82 are configured by the gear structure of the upper head 20 and the lower head 30 It is designed to limit the rotation of the upper head 20 and the lower head 30 as they are meshed or disengaged, so when the gears meshing with them are worn out due to their repeated meshing, backlash occurs to precisely adjust the angle of the spindle. It cannot be adjusted properly, resulting in a decrease in the machining precision of the workpiece.

In addition, the upper head 20 and the lower head 30 are pushed by the first and second movable units to release the engagement state with the first and second couplings 81 and 82, thereby adjusting the angle of the spindle 40. There is also a problem that the cycle time according to this is long and the operation rate of expensive equipment is reduced.

Republic of Korea Patent No. 10-1237779

In order to solve such a problem, the present invention has been made by the above-described background art, and rotation speed control that allows easy and precise control of the angle adjustment of the main shaft when adjusting the angle of a tool for processing a workpiece. It is an object of the present invention to provide a universal head unit for a machine tool equipped with the device.

In addition, the present invention provides a universal head unit for a machine tool equipped with a rotation speed control device to more precisely adjust the angle of a spindle by preventing backlash that occurs when a tool for processing a workpiece is adjusted at various angles. Its purpose is to provide

According to one embodiment of the present invention in order to solve this problem, the main sensor member is coupled to the control body, the main shaft is rotatably coupled therein, and the front part detects the rotation angle of the upper head. Main driving unit to be; an upper head coupled to a front part of the main drive unit, having a sub shaft connected to the main shaft, and having a sub sensor member configured therein to detect a rotation angle of the lower head; a lower head having a spindle connected to the sub shaft to be rotatably coupled to the upper head; a control body connected to the main shaft and configured to receive rotation angle information of the upper head transmitted from the main sensor member in real time and control whether or not the main shaft rotates and the number of rotations; and a control unit configured in the control main body, receiving rotation angle information of the upper head and the lower head from the main sensor member and the sub sensor member, controlling rotation of the main shaft, and controlling driving of the anti-backlash member. It is characterized in that it includes.

According to one embodiment of the present invention, the control body portion, the rotation shaft to which the spline of the main shaft is coupled; a driving motor for rotating the rotating shaft under the control of the control unit; a first encoder for transmitting the number of revolutions of the rotating shaft to the control unit; a rotational speed control device providing information on the rotational speed of the spline so that a difference between rotational speeds of the main shaft and the rotational shaft is detected; gear driving means for driving the rotational speed control device; and a second encoder connected to the rotational speed control device and configured to receive the rotational speed information of the main shaft and detect the difference value.

According to one embodiment of the present invention, the rotational speed control device, a fixed gear portion to which the outer circumferential surface of the spline is coupled, and a gear coupling is selectively made with the fixed gear portion by the gear driving means, the fixed gear characterized in that it comprises a rotating gear for transmitting a negative number of revolutions, and a transmission gear selectively engaged with the rotation gear by the gear driving means and transmitting the number of rotations of the fixed gear unit to the second encoder side. do.

According to one embodiment of the present invention, the main drive unit includes an outer main drive body coupled to the control body portion and the upper head; an inner main drive body coupled to the inside of the first outer main drive body; a first outer hydraulic housing inserted into the first inner main driving body and configured to control the rotation of the main shaft by receiving a predetermined hydraulic pressure; a first inner hydraulic housing inserted into and coupled to an inner circumferential surface of the first outer hydraulic housing, providing a predetermined pressing force toward the main shaft when the hydraulic pressure is supplied, and to which the anti-backlash member is mounted; and a damper member coupled to the front end of the first inner hydraulic housing and reducing backlash of the main shaft.

According to one embodiment of the present invention, the main driving unit is configured between the outer and inner main driving bodies, pressurizes the first outer hydraulic housing to prevent leakage of the supplied fluid, and maintains the hydraulic pressure constant. A main clamp that supports to be; It is characterized in that it further comprises.

According to one embodiment of the present invention, the main shaft and the sub-shaft are respectively mounted on outer circumferential surfaces, and the angle of the spindle is adjusted by reducing the backlash of the main shaft and the sub-shaft while moving in an axial direction under the control of the control unit. It is characterized in that it further includes; a backlash preventing member configured to be precisely adjusted.

According to one embodiment of the present invention, the upper head is provided with the sub-shaft, and is configured between a second inner hydraulic housing to which the anti-backlash member is mounted, and outer and inner main driving bodies configured in the upper head, , It is characterized in that a sub-clamp is further configured to pressurize the second outer hydraulic housing to prevent leakage of the supplied fluid and to support the hydraulic pressure to be constantly maintained.

According to one embodiment of the present invention, the anti-backlash member includes a rear pressing member configured to be in close contact with rear portions of the main bevel gear and the sub-bevel gear respectively constituted on the main shaft and the sub-shaft, and the rear pressing member. It is characterized in that it is composed of a pressurizing actuating means for actuating.

According to one embodiment of the present invention, the pressing actuating means includes a movable housing that presses the rear pressing member or releases the pressurized state, and a first drive configured in the movable housing to move the movable housing. A pressure actuating member composed of an actuating means and a second actuating actuating means for actuating the first actuating actuating means, a support housing to which the second actuating actuating means is coupled, and controlling the operation of the second actuating actuating means It is characterized in that it includes a pressure control unit and a sealing flange limiting the movement range of the movable housing.

According to one embodiment of the present invention, when adjusting the angle of a tool for processing a workpiece, it is possible to easily and accurately control the angle of the main shaft.

In addition, according to one embodiment of the present invention, there is an effect that the angle of the spindle can be more precisely adjusted by preventing backlash that occurs when a tool for processing a workpiece is adjusted at various angles.

1 is a cross-sectional view showing a universal head unit for a machine tool according to the prior art;
2 is a cross-sectional view showing a universal head unit for a machine tool equipped with a rotation speed control device according to an embodiment of the present invention;
3 is an enlarged view showing a main part of a universal head unit for a machine tool according to an embodiment of the present invention;
4 is an enlarged view showing a main driving unit according to an embodiment of the present invention;
5 is a view showing a control body of a universal head unit for a machine tool equipped with a rotation speed controller according to an embodiment of the present invention.

Specific aspects and specific technical features of the present invention will become more apparent from the following specific details and embodiments in conjunction with the accompanying drawings. In adding reference numerals to components of each drawing in this specification, it should be noted that the same components have the same numerals as much as possible, even if they are displayed on different drawings. In addition, in describing an embodiment of the present invention, if it is determined that a detailed description of a related known configuration or function may obscure the gist of the present invention, the detailed description will be omitted.

In addition, in describing the components of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are only used to distinguish the component from other components, and the nature, sequence, or order of the corresponding component is not limited by the term. When an element is described as being “connected,” “coupled to,” or “connected” to another element, that element is directly connected or connectable to the other element, but there is another element between the elements. It will be understood that elements may be “connected”, “coupled” or “connected”.

Hereinafter, an embodiment of the present invention will be described in detail based on the accompanying drawings.

As shown, the universal head unit for a machine tool equipped with the rotation speed control device of the present invention includes a main drive unit 100, an anti-backlash member 200, an upper head 300, a lower head 400, and a control body unit. It is configured to include 500.

The main drive unit 100 has a rear portion coupled to the control body portion 500 and a front portion coupled with the upper head 300 to support the rotational operation of the main shaft 102 for rotating the upper head 300 inwardly. It is configured to be connected to the control body unit 500.

The main driving unit 100 is coupled to the outer main driving body 110 coupled to the control body 500 and the upper head 300, and to the inside of the outer main driving body 110, and the front side to the upper part of the sensor. The inner main drive body 120 configured with the mounting portion is inserted into the inner main drive body 120 and is connected to the control body 500 to receive a predetermined hydraulic pressure and control the rotation of the main shaft 102 The first outer hydraulic housing 130 is configured to be inserted and coupled to the inner circumferential surface of the first outer hydraulic housing 130, the main shaft 102 passes through the center, and the hydraulic pressure supplied to the main A damper member ( 150) and the outer and inner main drive bodies 110 and 120, and pressurizes the first outer hydraulic housing 130 to prevent leakage of the supplied fluid, and the pressure of the fluid can be maintained constant. The main clamp 160 for supporting and the main sensor member 170 mounted on the front end of the inner main drive body 120 and detecting the rotation angle of the upper head 300 and transmitting it to the control unit 600 consists of including

Here, the main shaft 102 is connected to the sub-shaft 302 configured in the upper head 300 with its front portion to perform a rotational operation under the control of the control unit 600, which is configured in the sub-shaft 302 It is configured to include a main bevel gear 104 gear-engaged with the first sub-bevel gear 304 and a gear coupling part 106 to which the main bevel gear 104 is detachably coupled.

In addition, the main shaft 102 is configured with a spline (102a) configured to be coupled with the rotating shaft 502 of the control body portion 500 to be described later at the end of the rear portion.

The outer main drive body 110 is coupled to the control body 500 on the outer surface of the rear side, and electrical connection between the control body 600 and the main sensor member 170 built in the control body 500 is made. On the other hand, the main clamp 160 is mounted and a predetermined fluid is supplied to the main clamp 160 to form pressure by the fluid.

The outer main drive body 110 is provided with a sensor cover 112 that protects the main sensor member 170 provided at the front end, and is embedded inside the sensor cover 112, and the main sensor member 170 It is configured to include an insulating cover 114 that improves fixing force and protects from external impact, and a filling part 116 that supplies fluid to the main clamp 160 so that a predetermined pressure is formed.

At this time, the sensor cover 112 is detachably coupled to the front end of the outer main driving body 110, and presses the insulating cover 114 when coupled so that it is tightly coupled with the main sensor member 170. can

The inner main drive body 120 is disposed in the central portion through which the outer main drive body 110 penetrates, and is configured to be engaged with the outer main drive body 110 by insertion, thereby forming the first outer hydraulic housing 130. It is a component that supports operation.

The inner main driving body 120 has a cable receiving groove 122 through which a cable or the like passes so that an electrical connection is made between the control unit 600 and the sub-sensor member 370 for detecting the rotation angle of the sub-shaft 302, which will be described later. is formed

In addition, the inner main driving body 120 is formed so that the central portion penetrates so that the first outer hydraulic housing 130 and the first inner hydraulic housing 140 are inserted in opposite directions, and the first outer hydraulic housing ( 130) is configured to block leakage of the fluid supplied through.

The first outer hydraulic housing 130 is inserted into the rear part of the inner main driving body 120, and the hydraulic supply unit 132 connected to the hydraulic supply unit for supplying a certain amount of fluid under the control of the control unit 600 to the inner surface is formed

It is preferable that the first outer hydraulic housing 130 is provided with a leakage preventing means for preventing leakage of the fluid supplied to the outer circumferential surface.

In addition, the first outer hydraulic housing 130 constitutes a hydraulic pressure forming part 134 in which a predetermined hydraulic pressure is formed while the fluid supplied to the front inner surface is discharged, and the hydraulic pressure forming part 134 controls the pressure. 1 It is configured to press the inner hydraulic housing 140 toward the main shaft 102 to control the rotational operation of the main shaft 102, that is, to perform a braking operation.

The first inner hydraulic housing 140 is inserted from the front portion of the inner main driving body 120, and the outer surface portion is inserted into the inner circumferential surface of the first outer hydraulic housing 130 to form the hydraulic pressure forming unit 134. The space is configured to have an airtight force.

That is, when fluid is supplied to the hydraulic forming unit 134, the outer surface of the first outer hydraulic housing 130 is in close contact with the inner circumferential surface of the inner main driving body 120, and the first inner hydraulic housing 140 is pressurized. By doing so, the inner circumferential surface of the first outer hydraulic housing 130 and the outer circumferential surface of the first inner hydraulic housing 140 are configured to control the rotation of the main shaft 102 while maintaining a state in close contact with each other.

In addition, the first inner hydraulic housing 140 has a bearing member for supporting the rotational operation of the main shaft 102 inserted into its front inner circumferential surface, and is in close contact with the front portion of the bearing member, and the main shaft 102 and the sub-shaft A damper member 150 that reduces backlash generated during driving between the 302 is configured.

The damper member 150 is configured between the rear part of the main shaft 102 and the front part of the bearing member, and presses the main shaft 102 and the bearing member by a predetermined elastic force, respectively, and the main shaft 102 By reducing the play in the axial direction that occurs during rotation, it is configured to reduce the backlash that occurs during driving of the main shaft 102 and thereby enable precise angle adjustment of the spindle.

The damper member 150 is mounted on the damper housing 152, and the damper housing 152 is fixedly coupled to the first inner hydraulic housing 140 to support the position of the damper member 150 to be stably fixed do.

When fluid is supplied to the side of the first outer hydraulic housing 130, the main clamp 160 receives a certain amount of fluid from the fluid supply unit, and forms a predetermined pressure by the supplied fluid while forming the first outer hydraulic housing 130. ), when the braking operation is performed, the first outer hydraulic housing 130 and the first inner hydraulic housing 140 serve to support the operation while maintaining a state in close contact with each other.

The main clamp 160 has a pressure forming part formed on its upper surface configured to form a predetermined pressing force while receiving the fluid supplied to the upper surface.

The main sensor member 170 is mounted on the front end of the inner main drive body 120, detects the rotation angle of the upper head 300 and transmits it to the control unit 600, and rotates the main shaft 102. When the upper head 300 rotates due to the operation, information on the rotation angle of the upper head 300 is detected and transmitted to the control unit 600, and the upper head 300 is rotated by the set rotation angle. It is configured to stop the rotation of the main shaft 110 by controlling the drive of the hydraulic supply device.

At this time, the main sensor member 170 transmits a signal to the controller 600 through the first lead wire 502 .

Meanwhile, the sub-sensor member 370 also rotates the sub-shaft 302 when the lower head 400 rotates by the set rotation angle due to the rotation of the sub-shaft 302, similar to the main sensor member 170 described above. It is installed above the upper head 300 and transmits a signal to the control unit 600 through the second lead wire 504 by detecting the rotation angle of the lower head 400. .

At this time, the control unit 600 controls the operation of the hydraulic supply device for the operation of the sub-clamp 360 mounted on the upper head 300, the second outer hydraulic housing 330, and the second inner hydraulic housing 340. can be configured to

The anti-backlash member 200 is mounted on the outer circumferential surfaces of the main shaft 102 and the sub-shaft 304 respectively constituted by the main drive unit 100 and the upper head 300, preferably the first and second inner hydraulic housings. It is inserted into the inner circumferential surface of (140, 340) and moves in the axial direction under the control of the control unit 600, reducing the backlash of the main shaft 102 and the sub shaft 304 to make the angle of the spindle 410 more precise. It is configured to be adjustable, and is configured to include a rear pressing member 202 and a pressing operating means 204.

The rear pressing member 202 is seated in close contact with the rear parts of the main bevel gear 104 and the sub bevel gear 304 respectively constituted by the main shaft 102 and the sub shaft 302, and the pressing operation means 204 When driving, the main bevel gear 104 and the sub-bevel gear 304 are pushed forward, respectively, so that the main bevel gear 104, the sub-bevel gear 304, and the sub-bevel gear 304 are coupled with the spindle 410. ) It serves to reduce the backlash by reducing the gap between them, and is configured to include an elastic pressing member 210, an elastic fixing flange 220 and a contact ring 230.

As described above, the elastic pressing member 210 is configured to come into close contact with the rear parts of the main bevel gear 104 and the sub-bevel gear 304 .

The elastic fixing flange 220 is disposed at the rear portion of the elastic pressing member 210, and is coupled to the elastic pressing member 210 through a coupling means such as a fixing bolt, and the contact ring 230 is in close contact with the rear end thereof. It is configured to be configured so that the position of the elastic pressing member 210 is adjusted according to whether the movable housing 260 of the pressure operating means 240 for pressing the contact ring 230 is operated.

At this time, the elastic fixing flange 220 is configured to move along the axial direction of the main shaft 102 and the sub shaft 304 .

The pressing operating means 204 presses the rear pressing member 202 to reduce the gap between the bevel gears, and is disposed at the rear of the contact ring 230, and the main shaft 102 and the sub shaft ( 304), a movable housing 260 that presses the contact ring 230 or releases the pressurized state while moving in the axial direction of the movable housing 260, and a pressure operation member 240 that drives the movable housing 260 to be moved, Of the support housing 250 supporting the operation of the pressure operation member 240, the pressure control unit 280 and the movable housing 260 controlling the operation of the pressure operation member 240 coupled to the support housing 250. It is configured to include a sealing flange 270 to limit the range of movement.

Here, the front part of the movable housing 260 remains in contact with the contact ring 230, and the first driving actuating means 242 of the pressing actuating member 240 is mounted on the outer peripheral surface of the front side, and the first driving actuation means 242 is mounted. It is configured to move the main shaft 102 in the axial direction according to whether the operating means 242 is operated.

In addition, the pressure actuating member 240 is coupled to the first driving actuating means 242 configured to move the movable housing 260 under the control of the pressure control unit 280 and the support housing 250, and pressurizing It is connected to the controller 280 and consists of a second fixed operating means 244 that operates the first driving operating means 242 under the control of the pressurizing controller 280.

The first and second driving operation means 242, 244 may be composed of a magnetic body and a spring, preferably, the first driving operation means 242 may be made of a normal permanent magnet, and the second driving operation means ( 242) may be composed of an electromagnet that radiates the same pole as the permanent magnet, or diverges of a different pole.

Accordingly, when a drive signal is transmitted from the control unit 600 to reduce the backlash of the main bevel gear 104 or the sub-bevel gear 304 by the pressing control unit 280, the main bevel gear 104 or the sub-bevel gear 304 It may be configured to reduce play to either or both of the bevel gears 304 .

For example, the second drive operation means 242 configured on the main shaft 102 through the control of the pressure control unit 280 is similarly configured on the main shaft 102. When the magnetic force of the same type as the magnetic force is controlled to be dissipated, the movable housing 260 is moved by the pushing force of the magnetic force, and a predetermined pressing force is transmitted to the elastic pressing member 210 side of the rear pressing member 202, so that the main bevel It is configured to reduce the play between the gear 104 and the sub-bevel gear 304.

The control body unit 500 is connected to the main shaft 102 and receives in real time information on the rotation angle of the upper head 300 transmitted from the main sensor member 170 and determines whether or not the main shaft 102 rotates and rotates. The rotational shaft 502, the driving motor 504, the first encoder 510, the first shaft cover 520, the second shaft cover 530, and the rotational speed control device are configured to control the number. 550, a second encoder 570, and a controller 600.

The rotating shaft 502 is connected to the spline 102a of the main shaft 102 and configured to be connected to the drive motor 504 by the power transmission member 506, so that when the drive motor 504 is driven, the main shaft ( 102) to rotate.

This rotating shaft 502 is configured to be connected to the first encoder 510 by a coupling 512 . At this time, the first encoder 510 detects the number of rotations of the rotation shaft 502 and transmits the detected number of rotations to the controller 600 so that the number of rotations of the main shaft 102 is controlled.

That is, when the rotation angle of the upper head 300 is set, the first encoder 510 rotates the rotation number (or rotation amount) of the rotation shaft 502 so that the main shaft 102 rotates by the set rotation angle. ) is transmitted to the control unit 600, and the control unit 600 is configured to control the driving of the driving motor 504.

The first shaft cover 520 is rotatably coupled to the rotational shaft 502 and supports the rotational operation of the rotational shaft 502 .

The first shaft cover 520 is equipped with a second encoder 570 and a transmission gear 556 of an angle adjusting device 550 connected to the second encoder 570 on one side of the front side thereof.

The second shaft cover 530 is disposed in the front part of the first shaft cover 520, is configured such that the end of the main shaft 102 is inserted, and supports the rotation of the main shaft 102, and is splined. (102a) is supported so as to be coupled with the rotation shaft 502 while penetrating.

At this time, the second shaft cover 530 is spaced apart from the first shaft cover 520 by a predetermined interval, so that a space for mounting and driving the rotational speed control device 550 can be provided.

In addition, the second shaft cover 530 slides the rotation gear 554 of the rotation speed control device 550 upward on the outer circumferential surface so that gear coupling with the transmission gear 556 connected to the second encoder 570 is achieved A gear driving means 560 is mounted.

The rotational speed control device 550 transmits information on the rotational speed of the main shaft 102 to the second encoder 570 so that a difference between the rotational speeds of the main shaft 102 and the rotational shaft 502 is detected. It is a component that enables precise control of the rotational angle of the upper head 300 by transmitting.

The rotational speed control device 550 is configured to accurately control the rotational angle of the upper head 300 by precisely controlling the rotational speed of the main shaft 102, and the front end of the rotational shaft 502 It is inserted into, and the outer circumferential surface of the spline 102a is coupled to a fixed gear unit 552, which rotates together when the main shaft 102 rotates, and is selectively geared with the fixed gear unit 552. The rotational gear 554 that transmits the rotational speed of the fixed gear unit 552 and the rotational gear 554 are selectively geared, and the rotational speed of the fixed gear unit 552 is obtained from the rotational gear 554. Gear driving means 560 for driving the transmission gear 556 and the rotation gear 554, which are received and transmitted to the second encoder 570, to be gear-coupled with the fixed gear unit 552 and the transmission gear 556 It consists of including.

The fixed gear unit 552 is configured such that the rotation shaft 502 is inserted rearward to support the rotation operation, and the rotation shaft 502 is engaged with the rotation shaft 502 while the spline 102a is coupled forward. When the main shaft 102 is rotated by the rotation of ), the rotational operation is performed at the same rotational speed as the rotational speed of the main shaft 102.

The rotating gear 554 has gear teeth formed on the upper and lower portions, respectively, to be gear-coupled to the fixed gear unit 552 and the transmission gear 556, respectively. When the fixed gear unit 552 rotates, It serves to transmit the rotational speed of the fixed gear unit 552 to the transmission gear 556 side.

The rotating gear 554 is gear-coupled to the fixed gear unit 552 and the transmission gear 556 by driving the gear driving means 560 mounted on the second shaft cover 530, or is coupled. It is configured so that it can be released.

Here, the gear driving means 560 may be made of a conventional cylinder member, and the rotating gear 554 slides in the axial direction while gear coupling is performed with the fixed gear unit 552 and the transmission gear 556, respectively. configured to be done.

At this time, the gear driving means 560 is configured on the lower outer circumferential surface of the second shaft cover 530, and a movement guide member 562 supporting the axial movement of the rotary gear 554 may be further configured.

In addition, when the rotation gear 554 is disengaged from the fixed gear unit 552 and the transmission gear 556, the gear driving means 560 may further include a spring or the like that provides a predetermined buffering force. It is not limiting.

The transmission gear 556 transmits the number of rotations of the main shaft 102 transmitted from the rotation gear 554 to the second encoder 570 so that the number of rotations of the main shaft 102 can be precisely controlled.

The second encoder 570 is a difference between the rotational speeds of the main shaft 102 and the rotational shaft 502, that is, the clearance generated between the spline 102a and the rotational shaft 502 constituted by the main shaft 102. Detects a difference between the number of rotations of the main shaft 102 and the rotating shaft 502 caused by the above, and transmits information on the detected difference to the control unit 600 to determine the number of rotations of the main shaft 102. It is configured so that precise control of

That is, the rotational speed control device 550 is installed on the spline 102a of the main shaft 102 and transmits information about the rotational speed of the spline 102a to the second encoder 570 .

Although the present invention has been described in detail through an embodiment, this is for explaining the present invention in detail, and the universal head unit for a machine tool with easy angle adjustment according to the present invention is not limited thereto. In addition, terms such as "comprise", "comprise", or "have" described above mean that the corresponding component may be inherent unless otherwise stated, so excluding other components is not recommended. All terms, including technical or scientific terms, are generally understood by those skilled in the art to which the present invention belongs, unless otherwise defined. has the same meaning as being

In addition, the above description is merely an example of the technical idea of the present invention, and various modifications and variations can be made to those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention, but to explain, and the scope of the technical idea of the present invention is not limited by these embodiments. The protection scope of the present invention should be construed according to the claims below, and all technical ideas within the equivalent range should be construed as being included in the scope of the present invention.

100: main drive unit 102: main shaft
104: main bevel gear 106: gear coupling groove
110: outer main driving body 120: inner main driving body
130: outer hydraulic housing 140: inner hydraulic housing
150: damper member 160: main clamp
170: main sensor member 200: backlash prevention member
202: rear pressing member 204: pressing operation means
210: elastic pressing member 220: elastic fixing flange
230: close ring 240: pressure operation member
250: support housing 260: movable housing
270: sealing flange 280: pressurization control unit
300: upper head 302: sub shaft
304: sub bevel gear 360: sub clamp
370: sub sensor member 400: lower head
410: spindle 500: control body
502: rotation shaft 504: drive motor
506: power transmission member 510: first encoder
520: first shaft cover 530: second shaft cover
550: angle adjuster 560: gear driving means
570: second encoder 600: control unit

Claims (6)

a main driving unit coupled to the control body unit, having a main shaft rotatably coupled therein, and having a main sensor member configured to detect a rotational angle of the upper head at a front portion;
an upper head coupled to a front part of the main drive unit, having a sub shaft connected to the main shaft, and having a sub sensor member configured therein to detect a rotation angle of the lower head;
a lower head having a spindle connected to the sub shaft to be rotatably coupled to the upper head;
backlash prevention members mounted on outer circumferential surfaces of the main shaft and the sub-shaft, respectively, and reducing backlash of the main shaft and the sub-shaft while moving in an axial direction;
a control body connected to the main shaft and configured to receive rotation angle information of the upper head transmitted from the main sensor member in real time and control whether or not the main shaft rotates and the number of rotations;
A controller configured in the control main body unit to receive rotation angle information of the upper head and the lower head from the main sensor member and the sub sensor member, control rotation of the main shaft, and control driving of the anti-backlash member. contains,
The control body part,
a rotating shaft to which the spline of the main shaft is coupled;
a drive motor for rotating the rotating shaft under the control of the control unit;
a first encoder for transmitting the number of revolutions of the rotating shaft to the control unit;
a rotational speed control device providing information on the rotational speed of the spline so that a difference between rotational speeds of the main shaft and the rotational shaft is detected;
gear driving means for driving the rotational speed control device; and
a second encoder connected to the rotational speed control device and configured to receive the rotational speed information of the main shaft and detect the difference value;
Universal head unit for a machine tool equipped with a rotation speed control device comprising a.
delete According to claim 1,
The rotation speed control device,
A fixed gear portion to which an outer circumferential surface of the spline is coupled;
A rotary gear selectively engaged with the fixed gear unit by the gear driving means and transmitting the rotational speed of the fixed gear unit;
A transmission gear that selectively engages with the rotating gear by the gear driving means and transmits the rotational speed of the fixed gear unit to the second encoder side.
A universal head unit for a machine tool equipped with a rotation speed control device comprising a.
According to claim 1,
the main drive
An outer main driving body coupled to the control body and the upper head, respectively;
an inner main drive body coupled to the inside of the outer main drive body;
a first outer hydraulic housing inserted into the inner main driving body and configured to control the rotation of the main shaft by receiving a predetermined hydraulic pressure;
a first inner hydraulic housing inserted into and coupled to an inner circumferential surface of the first outer hydraulic housing, providing a predetermined pressing force toward the main shaft when the hydraulic pressure is supplied, and to which the anti-backlash member is mounted;
a damper member coupled to a front end of the first inner hydraulic housing and reducing backlash of the main shaft;
a main clamp disposed between the outer and inner main drive bodies, pressurizing the first outer hydraulic housing to prevent leakage of the supplied fluid, and supporting the hydraulic pressure to be constantly maintained;
A universal head unit for a machine tool equipped with a rotation speed control device comprising a.
According to claim 1,
The anti-backlash member,
A rear pressing member configured to be in close contact with rear portions of the main bevel gear and the sub bevel gear respectively constituted on the main shaft and the sub shaft;
A movable housing that presses the rear pressing member or releases the pressurized state;
A pressure actuating member composed of a first driving operating means constituted in the movable housing so as to move the movable housing, and a second driving operating means configured to operate the first driving operating means;
A support housing to which the second driving operation means is coupled;
A pressure control unit for controlling the operation of the second driving operating means;
Sealing flange limiting the range of movement of the movable housing
A universal head unit for a machine tool equipped with a rotation speed control device comprising a.
According to claim 1,
on the upper head
It is constituted between the second inner hydraulic housing having the sub-shaft and to which the anti-backlash member is mounted, and the outer and inner main driving bodies formed in the upper head, and pressurizing the second outer hydraulic housing to supply fluid A universal head unit for a machine tool equipped with a rotational speed control device, characterized in that a sub-clamp is further configured to prevent leakage and support the hydraulic pressure to be kept constant.

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