JP3731924B2 - Lubrication mechanism in tool equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention supports a drive shaft that is attached to a main shaft of a machine tool, a driven shaft that has a tool attached to the tip thereof, and that is interlocked and coupled to be movable in the axial direction independently of the drive shaft, and rotatably supports the drive shaft. The present invention relates to an oil supply mechanism for supplying cutting oil and lubricating oil from a machine tool side to a tool in a tool device including a support casing and a stopper pin mechanism that holds the support casing on a stationary member of the machine tool in a non-rotating state. For example, it is used for an oil supply mechanism of a tapper device that performs tapping (thread cutting) on a workpiece.
[0002]
[Prior art]
In a tool device, for example, the above-mentioned tapper device, an engagement piece attached to a driven shaft having a tap at a tip is attached to a clutch provided on a tapper body (drive shaft) that is rotationally driven by a main shaft of a machine tool. When engaged, the rotational force of the tapper body is transmitted to the driven shaft and moved by a predetermined stroke, so that the engagement piece is disengaged from the clutch, the transmission force from the tapper body is cut off, and the driven shaft is in the neutral state. In addition, a ball rolling groove that allows the ball to roll only in the axial direction is formed on the opposing surface of the engagement piece and the driven shaft to which the engagement piece is attached. A rotational force transmitting ball is interposed between the engaging piece and the driven shaft. The engaging piece and the driven shaft are engaged with the rotational force transmitting ball to rotate integrally, and the engaging piece and the driven shaft transmit the rotational force. guide is to use the ball So that the driven shaft is moved tapper body, i.e. in the axial direction independently of the drive shaft side Te.
[0003]
As described above, the driven shaft is moved in the axial direction independently of the tapper main body (driving shaft), from the fixed member of the machine tool to the tap (tool) of the driven shaft tip. In order to provide an oil supply mechanism for supplying cutting oil and lubricating oil, a support casing that rotatably supports the driven shaft and the drive shaft, and a stopper that holds the support casing on a stationary member of the machine tool in a non-rotating state. A pin mechanism is provided, an oil path is formed in the stopper pin mechanism, an oil path leading to the oil hole of the tap is formed on the tip end side of the driven shaft, and further movable with the oil path of the stopper pin mechanism on the fixed side One end of a bellows tube or a rubber hose, which can be expanded and contracted via a swivel joint, is attached to the tip of the driven shaft in order to connect the oil passage on the driven shaft side, which is the side, to the driven shaft side Oil of Linked to, it is conceivable to the other end portion of such a bellows tube so as to be connected to the oil passage of the stopper pin mechanism.
[0004]
[Problems to be solved by the invention]
As described above, when the oil supply mechanism is provided in the tool device in which the driven shaft moves in the axial direction independently of the drive shaft, the oil path and the movable side of the stopper pin mechanism that is the fixed side are provided. If a bellows tube is used to communicate with the oil path on the driven shaft side, the bellows tube, etc. repeatedly expands and contracts or bends and deforms easily, so it is easily damaged and requires frequent replacement. Therefore, there is a problem that the replacement work takes a lot of time. In view of this point, the present invention is not particularly damaged in the communication portion between the oil passage of the stopper pin mechanism which is the fixed side and the oil passage of the driven shaft which is the movable side, and it can be used for a long time. The purpose is to provide an oil supply mechanism that can be used properly.
[0005]
[Means for Solving the Problems]
An oil supply mechanism according to claim 1 of the present invention includes a drive shaft attached to a main shaft S of a machine tool, a driven shaft having a tool attached to a tip thereof, and interlockingly coupled so as to be movable in the axial direction independently of the drive shaft. The tip of the driven shaft 5 is a tool device including a support casing 28 that rotatably supports the drive shaft, and a stopper pin mechanism 34 that holds the support casing 28 in a non-rotating state on a fixing member 38 of the machine tool. A swivel arm 48 is attached to the section orthogonal to the driven shaft 5, and the swivel arm 48 moves integrally with the driven shaft 5 as the driven shaft 5 moves forward. A cylinder 46 extending in parallel is provided, and a spool rod 47 is fitted into the cylinder 46, and a tip end portion of the spool rod 47 is integrally connected to a free end portion of the swivel arm 48. The stopper pin mechanism 34, the cylinder 46, the spool rod 47, the swivel arm 48, the driven shaft 5, and the tool 7 form a series of oil passages that communicate with each other, and the inner peripheral surface of the cylinder 46 and the outer periphery of the spool rod 47 An oil passage 49 that is long in the axial direction is formed between the oil passage 49 and the oil passage 50 and the oil passages 50 and 51 of the spool rod 47.
[0006]
The oil supply mechanism according to claim 2 includes a drive shaft 1 attached to a main shaft of a machine tool, a driven shaft 5 to which a tool 7 is attached at a tip, a clutch 25 provided on the drive shaft 1 side, and a driven shaft 5 side. The clutch ball 12 is provided, a support casing 28 that rotatably supports the drive shaft 1, and a stopper pin mechanism 34 that holds the support casing 28 in a non-rotating state on a fixing member 38 of the machine tool. Is engaged with the clutch 25 so that the rotational force of the drive shaft 1 is transmitted to the driven shaft 5 and the driven shaft 5 is movable in the axial direction independently of the drive shaft 1. in, mounted perpendicular to the driven shaft 5 a swivel arm 48 to the distal end portion of the driven shaft 5, the swivel arm 48 is moved integrally with the driven shaft 5 with the forward movement of the driven shaft 5 The support casing 28 is provided a cylinder 46 extending in parallel to the driven shaft 5, fitted the spool rod 47 to the cylinder 46, integrally connected to the distal end portion of the spool rod 47 to the free end of the swivel arm 48 The stopper pin mechanism 34, the cylinder 46, the spool rod 47, the swivel arm 48, the driven shaft 5 and the tool 7 form a series of oil passages communicating with each other, and the inner peripheral surface of the cylinder 46 and the spool rod An oil passage 49 which is long in the axial direction is formed between the outer peripheral surface of 47 and the oil passage 49 and the oil passages 50 and 51 of the spool rod 47 are always in communication.
[0007]
According to a third aspect of the present invention, in the oil supply mechanism in the tool device according to the first or second aspect, the stopper pin mechanism 34 is provided on the rear end side of the support casing 28, and the cylinder 46 is provided on the front end side of the support casing 28. 34 is provided inside.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
An example in which the embodiment of the present invention is implemented in a tapper device will be described in detail. In FIG. 1 showing the tapper device, reference numeral 1 denotes a first member 1a on the side that receives a rotational force from a spindle S of a machine tool; A shank portion 2 fitted and fixed to the main shaft S is concentrically connected to the base end portion of the first member 1a in a tupper main body (drive shaft) formed separately from the second member 1b on the side where the clutch is provided. The shank portion 2 is provided with a flange portion 3 that is gripped by a manipulator. The first member 1a and the second member 1b are each formed in a hollow shape, and the proximal end portion of the second member 1b is fitted into the distal end portion of the first member 1a, and penetrates each fitting portion in the radial direction. The members 1a and 1b are connected to each other by a plurality of pins 4 so as to be integrally rotatable. A driven shaft 5 is attached to the inside of the tapper main body 1 so as to be slidable and rotatable in the axial direction, and a tap 7 is attached to a distal end portion of the driven shaft 5 via a tap holder 6.
[0009]
The proximal end side shaft portion 5a of the driven shaft 5 is fitted into the shaft insertion hole 8 of the first member 1a of the tapper main body 1, and the inner side of the shaft insertion hole 8 has a machine tool side and a tap 7 side. An absorption spring 9 for absorbing an error in feeding in the axial direction is provided.
[0010]
Referring to FIGS. 1 to 3, a clutch ball holding ring 11 made of a rigid body (metal) is fitted on the base end side of the driven shaft 5 so as to be rotatable and axially movable. A plurality of clutch balls 12 are held at fixed positions on the ring 11 in two rows in the axial direction at regular intervals in the circumferential direction (see FIGS. 1 and 2). Between the clutch ball holding ring 11 and the driven shaft 5, a plurality of torque transmissions for transmitting the rotational force of the tapper body 1 to the driven shaft 5 through the clutch ball 12 and the clutch ball holding ring 11. Balls 13 are interposed, and these rotational force transmitting balls 13 are inserted into the ball rolling grooves 14a of the ball receiver 14 made of a rigid body (metal) embedded in the driven shaft 5 and extending in the axial direction. It is fitted so as to be able to roll only in the direction, and is fitted so as to be able to roll only in the axial direction in a ball rolling groove 11 a provided in the axial direction on the inner peripheral surface of the clutch ball holding ring 11.
[0011]
As apparent from FIGS. 2 and 4, the ball receiver 14 is provided with a fitting recess 16 that is recessed along the axial direction on the driven shaft 5 together with elastic members 15 and 15 mounted on both side surfaces thereof. The fitting is fixed. As the elastic member 15, natural or synthetic rubber or soft synthetic resin such as urethane is used.
[0012]
As shown in FIG. 1, a bracket 17 is provided on the distal end side of the driven shaft 5 so as to be rotatable relative to the driven shaft 5, and a sliding contact ring 18 provided on the bracket 17 and the clutch ball holding ring 11 are arranged. A return spring 21 for returning the driven shaft 5 to the proximal end side is interposed between the distal end side and the spring force of the return spring 21 is weaker than that of the absorption spring 9. In addition, a buffer spring 24 having a spring force weaker than that of the return spring 21 is interposed on the rear end side of the clutch ball holding ring 11.
[0013]
Further, as shown in FIG. 1, the base end side of the second member 1b of tapper body 1, forward rotation clutch 25 each clutch ball 12 on the left side in the figure is engaged in line contact state is provided, Further, on the front end side of the second member 1b, there is provided a reverse rotation clutch 26 in which the right clutch balls 12 in the drawing are engaged in a line contact state as described above via a reverse rotation mechanism 33 which will be described later. Between the clutches 25 and 26, a neutral space 27 is provided in which the clutch balls 12 are not engaged.
[0014]
As shown in FIG. 1, the second member 1 b of the tapper body 1 (drive shaft) is divided into a proximal end side member a and a distal end side member b at its axially intermediate portion. The forward rotation clutch 25 is provided on the inner peripheral side, and the reverse rotation clutch 26 is provided on the inner peripheral side of the distal end side member b. On the outer peripheral side of the tapper main body 1, a support casing 28 is provided in a state of being supported by a bearing 29 so as to be rotatable relative to the tapper main body 1, and a tip end portion of the support casing 28 is fixed to the bracket 17. A reverse bevel gear 30 is pivotally supported on the support casing 28 so as to be orthogonal to the axial direction of the driven shaft 5. The reverse bevel gear 30 is sandwiched from the front and the rear end portions of the first member 1a. gear wheel 31, 32 on both sides a pair on the front end side member b of the two members 1b are opposed, both gear wheels 31, 32 are meshed with the reverse bevel gear 32, these reversing bevel gear 30 and Ryodai A reverse rotation mechanism 33 is constituted by the gears 31 and 32. In this case, one large gear 31 is provided on the forward rotation clutch 25 side, and the other large gear 32 is provided on the reverse rotation clutch 26 side. With this reverse rotation mechanism 33, the reverse rotation clutch 26 is always rotated in the reverse rotation state with respect to the rotation direction of the forward rotation clutch 25.
[0015]
The distal end side member b of the second member 1b and the large gear 32 provided on the second member 1b rotate integrally with each other, but the distal end side member b is slidable in the axial direction with respect to the large gear 32. However , a buffer spring 35 is interposed between the tip end portion b of the second member 1b and the sliding contact ring 18 provided on the bracket 17, and the tip end member b is supported by the spring 35. It is always urged in the direction of the end member a.
[0016]
As shown in FIGS. 1 and 5, each pin 4 that connects the first member 1 a of the tapper body 1 and the proximal end member a of the second member 1 b so as to be integrally rotatable is provided with the pin 4. A ring-shaped elastic member 36 is attached to the end of the second member 1b, and the elastic member 36 is fitted into a recessed portion 37 that is recessed in the base end side member a of the second member 1b. The base member a of the second member 1b can be slightly elastic in the circumferential direction by the elastic member 36 with respect to the first member 1a. Therefore, even if the impact force of the clutch ball 12 is applied to the second member 1b when the clutch ball 12 is engaged with the forward rotation clutch 25 from the neutral state, the impact force is absorbed and relaxed by the elastic member 36, and the work force is reduced. Propagation to the machine side can be prevented.
[0017]
As shown in FIG. 1, the tapper device is provided with a stopper pin mechanism 34 including a stopper pin 39 and a pin holder 41 for holding the support casing 28 in a non-rotating state with respect to the fixing member 38 of the machine tool. An oil supply mechanism 40 is provided for supplying the cutting oil for cooling and lubrication to the tap 7 using the stopper pin mechanism 34.
[0018]
The stopper pin mechanism 34 and the oil supply mechanism 40 will be described. A pin holder 41 is attached to the base end side of the support casing 28 in parallel with the driven shaft 5, and a hollow stopper pin 39 is pinned to the pin holder 41. It is urged in the protruding direction by a spring 42 provided in the inner back portion of the holder 41. The stopper pin 39 is integrally attached to the stopper pin 39. The stopper member 43 is movable in the axial direction of the stopper pin 39 with respect to the pin holder 41, and is urged by the spring 42 biasing force. 1 is pushed to the left in FIG. 1 together with the stopper pin 39, so that when not in use, the free end portion of the detent member 43 is fitted into the detent ring 44 attached to the shank portion 2, The part 2 and the support casing 28 are coupled so as not to rotate relative to each other.
[0019]
A support member 45 is attached to the front end side of the support casing 28 on the outside of the bracket 17, and a cylinder 46 is passed through and fixed to the support member 45 in parallel with the driven shaft 5. 47 is slidably inserted in the axial direction so as to protrude from both ends of the cylinder 46, and the distal end portion of the spool rod 47 is attached to the distal end side of the driven shaft 5 so as to be orthogonal to the driven shaft 5. The swivel arm 48 is integrally connected to the free end portion. An annular oil passage 49 having an axial length longer than the maximum movement amount of the driven shaft 5 is formed between the inner peripheral surface of the cylinder 46 and the outer peripheral surface of the spool rod 47. A communication passage 50 pierced in the diameter direction that can always communicate with the annular oil passage 49 of the cylinder 46 and an oil passage 51 formed along the axis so as to communicate with the communication passage 50 are provided. The distal end side of the passage 51 is connected to an oil passage 52 provided in the swivel arm 48 in communication. The oil passage 52 of the swivel arm 48 is connected to an oil passage 54 that communicates with the tip of the tap 7 via a communication passage 53 provided in the driven shaft 5. Further, an oil passage 55 communicating with the annular oil passage 49 in the cylinder 46 is provided in the support member 45, and the oil passage 55 in the support member 45 and the oil passage 56 in the pin holder 41 communicate with each other. The pipes 57 are connected in communication. A spherical body 59 and a coil spring 60 constituting a check valve are provided at the protruding side end portion of the oil passage 58 in the stopper pin 39.
[0020]
Thus, a series of oil passages communicating with each other over the stopper pin 39, the pin holder 41, the communication pipe 57, the support member 45, the cylinder 46, the spool rod 47, the swivel arm 48, the driven shaft 5, and the tap 7 are provided. It is formed. Accordingly, as shown in FIG. 1, the tapper device is mounted on the spindle S of the machine tool via the shank portion 2, and the stopper pin 39 is fitted into the fitting hole 61 of the fixing member 38 of the machine tool. The series of oil passages are connected to and connected to an oil supply port 62 provided in the fixing member 38 of the machine tool, so that the driven shaft 5 is connected to the tapper body 1 (drive shaft) by the driven shaft 5 from the oil supply pipe 63. Even if it moves independently, it will be continuously supplied to the oil hole (not shown) of the tap 7 through the series of oil passages.
[0021]
A usage mode of the tapper mechanism having the above-described configuration and the oil supply mechanism 40 provided thereon will be described.
[0022]
First, when using the tapper mechanism, the flange portion 3 shown in FIG. 1 is gripped by a manipulator, the shank portion 2 is mounted on the spindle S of the machine tool, and the tapper body 1 is rotated by the rotation drive of the spindle S. The clutch ball 12 is pushed toward the forward rotation clutch 25 via the clutch ball holding ring 11 by the urging force of the return spring 21 that presses the driven shaft 5 toward the proximal end side, and engages with the forward rotation clutch 25. Therefore, the driven shaft 5 is rotated forward by the rotation of the tapper body 1.
[0023]
While the spindle S of the machine tool is rotated and fed, the tap 7 at the tip of the driven shaft 5 is pressed against the work (not shown) to start the tap hole forming operation. At this time, if the tap 7 does not immediately bite against the workpiece, the driven shaft 5 is temporarily retracted by a slight amount against the urging force of the absorption spring 9 due to the reaction force of the workpiece. When the main shaft S is caught, the tap 7 enters the hole of the workpiece while the entire tapper mechanism including the driven shaft 5 moves forward by the rotation and feed of the main shaft S, and the tap hole forming operation is started. When the feeding of the main shaft S is stopped in the course of forming the tapped hole, the driven shaft 5 is guided by the tapped hole itself, that is, advances alone by self-propulsion force.
[0024]
In the self-propulsion stage of the driven shaft 5, each clutch ball 12 held by the clutch ball holding ring 11 is engaged with the forward rotation clutch 25 on the tapper body 1 side in a line contact state. Thus, the rotational force transmitting ball 13 interposed between the clutch ball holding ring 11 and the ball receiver 14 fixed to the driven shaft 5 is in a point contact state with respect to the ring 11 and the ball receiver 14. First, the driven shaft 5 advances independently independently of the clutch ball holding ring 11 due to the difference between the frictional forces of the two. Therefore, as shown in FIG. 6 , the spring receiver 23 locked by the retaining ring 22 moves integrally with the driven shaft 5, thereby compressing the spring 24.
[0025]
As described above, when the driven shaft 5 advances by a predetermined stroke by the self-propelling force, the spring receiver 23 that moves integrally with the driven shaft 5 comes into contact with the rear end of the clutch ball holding ring 11. As a result, the clutch ball 12 starts to be disengaged from the forward rotation clutch 25. Thus, when the tapped hole formation is completed, the clutch ball 12 is disengaged from the forward rotation clutch 25 and reaches the neutral space 27, and the transmission of the rotational force from the tapper body 1 side to the driven shaft 5 is cut off to be in the neutral state. It becomes.
[0026]
From the neutral state, by sending the main spindle S of the machine tool in the reverse direction by a predetermined amount and moving the tapper body 1 backward, the clutch ball 12 on the right side is not shown in the figure, but the tip side member of the second member 1b. Engage with a reverse clutch 26 provided at b. Since the rotational force from the first member 1a is constantly transmitted to the distal end side member b of the second member 1b through the reverse rotation mechanism 33, the clutch ball 12 is engaged with the reverse rotation clutch 26 to drive the driven shaft. 5 is driven in reverse. Then, the reverse rotation of the driven shaft 5 similarly guides the tap hole itself, and the tap 7 comes out of the tap hole.
[0027]
When the clutch ball 12 is engaged with the reverse rotation clutch 26, a large circumferential impact force acts on the clutch ball 12, and this impact force is a ball that receives the rotational force transmitting ball 13 as shown in FIG. Absorption is alleviated by the elastic members 15 provided on both side surfaces of the receiver 14. In other words, the circumferential impact force acting on the clutch ball 12 is transmitted to the ball receiver 14 through the clutch ball retaining ring 11 and the rotational force transmitting ball 13. The force is absorbed and relaxed by the elastic members 15 mounted on both sides of the ball receiver 14 in the rotational direction of the driven shaft. Thereby, the impact force in the circumferential direction applied to the clutch ball 12 does not act on the driven shaft 5, and therefore the tap hole forming accuracy by the tap 7 is not lowered.
[0028]
At this time, the impact force applied to the clutch ball 12 acts on the first member 1a through the base end side member a of the second member 1b of the tapper body 1, and this impact force is applied to the first member 1a and the second member. Absorption is reduced by the elastic member 36 attached to each pin 4 that is connected to the base end side member a of 1b so as to be integrally rotatable, thereby preventing propagation to the machine tool side, and to the machine tool side. There is no adverse effect.
[0029]
On the other hand, during use of the above-described tapper mechanism, the cutting oil fed from the oil supply pipe 63 to the oil supply port 62 becomes the stopper pin 39, the pin holder 41, the communication pipe 57, the support member 45, the cylinder 46, and the spool rod 47. The swivel arm 48, the driven shaft 5, and the tap 7 are supplied to the tap hole from an oil hole (not shown) of the tap 7 through a series of oil passages communicating with each other.
[0030]
Thus, when the driven shaft 5 moves forward independently of the tapper body 1 by self-propelling force in the process of forming the tapped hole, the swivel arm 48 is driven as the driven shaft 5 moves forward. When the swivel arm 48 moves together with the shaft 5, the spool rod 47 in the cylinder 46 moves parallel to the driven shaft 5. Even during such movement of the spool rod 47, an annular chamber 49 having an axial length longer than the maximum movement amount of the driven shaft 5 is formed in the cylinder 46, and penetrates in the diameter direction of the spool rod 47. Since the provided communication passage 50 is always in communication with the annular chamber 49, the oil passage portion from the oil passage 55 of the support member 45 to the oil passage 52 of the swivel arm 48 is not blocked. The cutting oil supplied from the pipe 63 to the oil supply port 62 is supplied to the oil hole of the tap 7 through a series of oil passages extending from the stopper pin 39 to the tap 7.
[0031]
As mentioned above, although the embodiment of the present invention has been described with respect to the tool device provided with the clutch mechanism, the oil supply mechanism of the present invention has no clutch mechanism, and the driven shaft is independent of the drive shaft in the axial direction. The present invention can also be applied to a movable tool device. In the above-described embodiment, the support member 45 is provided on the distal end side of the support casing 28 and the cylinder 46 is attached to the support member 45. However, the cylinder 46 may be directly attached to the outside of the support casing 28. . Further, although the communication pipe 57 is provided between the stopper pin 39 and the support member 45, the pin holder 41 of the stopper pin 39 and the cylinder 46 may be connected to each other by an appropriate communication member such as a pipe. .
[0032]
Further, as shown in FIG. 1, the stopper pin 39 is provided on the rear end side of the support casing 28, and the cylinder 46 is provided on the inner side of the stopper pin mechanism 34 on the front end side of the support casing 28. The lengths of the spool rod 47 and the swivel arm 48 can be shortened, whereby the structure is simple and the manufacture is easy.
[0033]
【The invention's effect】
According to the oil supply mechanism of the first aspect of the present invention, when the driven shaft moves independently of the drive shaft, the swivel arm moves integrally with the driven shaft as the driven shaft moves. As the arm moves, the spool rod in the cylinder moves parallel to the driven shaft, and the oil passage in the cylinder and the oil passage in the spool rod are always in communication. Also, even if the moving stroke is long, the oil passage is not blocked, and therefore the oil can be supplied to the tool through a series of oil passages from the stopper pin mechanism to the tool. Further, according to this oil supply mechanism, the communicating portion between the oil path of the stopper pin mechanism that is the fixed side and the oil path of the driven shaft that is the movable side is constituted by the swivel arm, the cylinder, and the spool rod. Compared with bellows, hoses, etc., it can accurately respond to the movement of the driven shaft, and since it has high mechanical strength, it has excellent durability and can be used properly for a long time.
[0034]
According to the oil supply mechanism of the second aspect, the clutch mechanism is interposed between the drive shaft and the driven shaft, and the clutch ball is engaged with the clutch, whereby the rotational force of the drive shaft is reduced. In a tool device such as a tapper device in which the driven shaft is movable in the axial direction independently of the driving shaft, the same effect as that of the first aspect can be obtained. it can.
[0035]
According to the oil supply mechanism of the third aspect, the stopper pin is provided on the rear end side of the support casing, and the cylinder is provided on the front end side of the support casing on the inner side of the stopper pin mechanism. Can reduce the length of each swivel arm, thereby making the structure simple and easy to manufacture.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view showing an oil supply mechanism according to the present invention.
2 is an enlarged cross-sectional view taken along line XX of FIG.
FIG. 3 is a partially enlarged detail view of FIG. 1;
FIG. 4 is a plan view showing a rotational force transmitting ball, a ball receiver, and an elastic member.
5 is an enlarged cross-sectional view taken along line YY in FIG.
FIG. 6 is a cross-sectional view showing an operating state of the tapper device.
[Explanation of symbols]
S Machine tool spindle 1 Tapper body (drive shaft)
5 Driven shaft 7 Tap 28 Support casing 34 Stopper pin mechanism 40 Oil supply mechanism 46 Cylinder 47 Spool rod 48 Swivel arm

Claims (3)

A drive shaft attached to the main shaft of the machine tool, a driven shaft having a tool attached to the tip and interlockingly coupled so as to be movable in the axial direction independently of the drive shaft, and a support casing that rotatably supports the drive shaft; In a tool device having a stopper pin mechanism for holding the support casing on a stationary member of a machine tool in a non-rotating state, a swivel arm is attached to the tip of the driven shaft so as to be orthogonal to the driven shaft. The swivel arm moves integrally with the driven shaft along with the forward movement, and the support casing is provided with a cylinder extending in parallel with the driven shaft. A spool rod is fitted into the cylinder, and the tip of the spool rod is inserted into the swivel. It is integrally connected to the free end of the arm, and the stopper pin mechanism, cylinder, spool rod, swivel arm, driven shaft and tool are connected to each other. A series of oil passages are formed, and an oil passage that is long in the axial direction is formed between the inner peripheral surface of the cylinder and the outer peripheral surface of the spool rod, and the oil passage and the oil passage of the spool rod are always in communication with each other. An oil supply mechanism in the tool device. A drive shaft attached to the main shaft of the machine tool, a driven shaft to which a tool is attached at the tip, a clutch provided on the drive shaft side, a clutch ball provided on the driven shaft side, and a support for rotatably supporting the drive shaft A casing and a stopper pin mechanism that holds the support casing in a non-rotating state on a stationary member of the machine tool. When the clutch ball engages with the clutch, the rotational force of the drive shaft is transmitted to the driven shaft. In addition, in a tool device in which the driven shaft can move in the axial direction independently of the driving shaft, a swivel arm is attached to the tip of the driven shaft perpendicular to the driven shaft, and the driven shaft moves forward. with in the moved together with the swivel arm driven shaft, the supporting casing is provided a cylinder extending parallel to the driven shaft, fitted to the spool rod to the cylinder A tip end portion of the spool rod is integrally connected to the free end portion of the swivel arm, and a series of oil passages communicating with each other over the stopper pin mechanism, cylinder, spool rod, swivel arm, driven shaft and tool are formed. In addition, a long oil passage is formed in the axial direction between the inner peripheral surface of the cylinder and the outer peripheral surface of the spool rod, and the oil supply in the tool device is configured such that the oil passage and the oil passage of the spool rod are always in communication. mechanism.   The oil supply mechanism in the tool device according to claim 1 or 2, wherein the stopper pin is provided on the rear end side of the support casing, and the cylinder is provided on the front end side of the support casing on the inner side of the stopper pin mechanism.

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