JP5879740B2 - Lubricating oil supply device - Google Patents

Description

  The present invention relates to a lubricating device for machine tools, and more particularly to a lubricating device for a tool clamp portion of a spindle spindle.

  As a machine tool, a so-called machining center is known in which a tool attached to the tip of a spindle spindle that rotates at high speed is exchanged according to a program and a plurality of machining can be performed by one machine.

  By the way, at the time of a tool change, the coolant dripped at the processing portion during the processing operation is applied to the tool clamp mechanism of the spindle spindle, and the lubricating oil applied to the tool clamp mechanism is washed away. When continuous production is performed, the lubricating oil is washed away every time the tool is changed, and eventually the lubrication is insufficient. If the tool clamp mechanism is insufficiently lubricated, the tool may not be reliably clamped due to the structure of the tool clamp mechanism described later.

  For this reason, it is necessary to supply lubricating oil to a tool clamp mechanism regularly. In general, lubricating oil is supplied by manual spray application in a state where production is interrupted and the machine tool is stopped. However, since it is necessary to apply the spray by aiming at a site where the lubricant oil needs to be supplied, it takes time for the operation. For example, when the lubricating oil supply timings of a plurality of machining centers overlap, the time for interrupting the production becomes longer. Increasing the manpower can reduce the interruption time, but cannot reduce the man-hours.

  Therefore, it is desirable to reduce the frequency at which production is interrupted or shorten the time required for the lubricating oil supply operation. Patent Document 1 discloses a configuration in which a lubricating oil can be continuously supplied by providing an oil receiver that temporarily stores lubricating oil and providing a communication path from the oil receiver to a lubricating place.

JP-A-10-159846

  However, in the configuration of Patent Document 1, the lubricating oil is supplied from the oil receiver via the communication path to the lubricating place by the action of gravity. Therefore, it cannot be applied to a part that rotates at high speed, such as a tool clamp mechanism provided on a spindle spindle of a machining center. If the spindle spindle is provided with an oil receiver, the lubricating oil will not flow into the communication path due to centrifugal force.If an oil receiver is provided separately from the spindle spindle, supply to the tool clamp mechanism during high-speed rotation will become increasingly difficult. is there.

  Therefore, an object of the present invention is to provide a lubricating oil supply device that can reduce the number of steps required to supply lubricating oil to the tool clamp mechanism of the spindle spindle.

The lubricating oil supply device of the present invention includes a cam portion and a claw member for pushing a claw member of a tool clamp mechanism provided on a spindle spindle, which holds the tool by extending the claw member in a radial direction by drawing the drawing member. The lubricating oil is supplied to a plurality of lubricating oil supply portions arranged on the circumference. Then, a coating case chamber filled with lubricating oil, a coating piston that can be moved back and forth in the coating case chamber, a discharge elastic member that presses the coating piston in one direction, and a lubrication adjacent to the coating case chamber via a partition wall An oil supply port and a lubricating oil discharge pin that moves integrally with the coating piston and protrudes through the partition wall to the lubricating oil supply port are provided. In addition, the accumulation of lubricating oil discharged from the application case chamber reaches the position where the lubricating oil supply part reaches when the application case chamber and the lubricating oil supply port are communicated with each other by penetrating or bypassing the partition wall. A plurality of nozzles that open to form a portion, and a pressing force applying means that applies a pressing force in the direction of the lubricating oil supply port to the lubricating oil in the coating case chamber. Then, when inserted into the tool clamp mechanism from the lubricating oil supply port side, the lubricating oil supply part enters the pool part, the lubricating oil is supplied to the lubricating oil supply part, and the lubricating oil discharge pin is pressed against the drawing member The application piston moves in a direction away from the partition wall. When the tool clamp mechanism is disengaged or the retracting member is pulled into the tool clamp mechanism, the application piston pushes the lubricant in the application case chamber to the lubricant supply port by the elastic force of the discharge elastic member.

According to the present invention, when inserted into the tool clamp mechanism, the lubricating oil supply portion enters the pool portion, so that the lubricating oil can be easily supplied. In addition, the application piston moves away from the partition during insertion, and if it is removed from the tool clamp mechanism, the lubricant in the application case chamber is pushed out to the lubricant supply port by the elastic force of the discharge elastic member. By simply making it, the amount of grease taken out to the lubricating oil supply site can be replenished to the pool portion. That is, it is possible to supply the lubricating oil to the lubricating oil supply portion and to replenish the grease taken out by the lubricating oil supply portion only by inserting it into the tool clamp mechanism and removing it. Thereby, the man-hour required for lubricating oil supply can be reduced significantly.

It is sectional drawing of the grease coating device which concerns on embodiment of this invention. It is a front view of a partition. It is a front view of an application piston. It is a figure which shows the other example of the front view of an application | coating piston. It is sectional drawing of the grease application | coating apparatus of the state which pulled the piston rod. It is the figure which looked at the rear cap from the axial direction. It is sectional drawing along the central axis of a tool clamp mechanism. It is a figure which shows the state which inserted the grease application apparatus in the tool clamp mechanism. It is a figure which shows the state which clamped the grease application apparatus. It is a figure which shows the state which unclamped the grease application apparatus. It is a figure which shows the state which inserted the grease application apparatus of the initial state in the tool clamp mechanism.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a cross-sectional view along the axial direction of a grease applying device A as a lubricating oil supply device according to an embodiment of the present invention. The grease applying apparatus A is an apparatus for supplying grease to a tool clamp mechanism provided on a main spindle of a machining center having a horizontal rotation axis.

  In the following description, the left side of FIG. 1 is the front end, and the right side is the rear end.

  The grease applicator A includes an applicator unit B and a grease pump unit C.

  The grease pump portion C includes a cylindrical grease case 1, a front case 2 fixed to the front end thereof, and a rear cap 3 fixed to the rear end.

  The front case 2 and the rear cap 3 are fixed to the grease case 1 with a locking bolt 14. A packing 15 is interposed between the grease case 1 and the front case 2.

  Inside the grease case 1, a pumping piston 7 is stored so as to be slidable in the axial direction of the grease case 1. Further, one end of the piston rod 5 is connected to the central portion of the pressure feeding piston 7 with play. The piston rod 5 has a rear end penetrating the rear cap 3 and projecting outside the grease pump C, and is provided with a lever 6 at the rear end. The piston rod 5 is provided with a scale at a predetermined interval from the rear end side to the front end side, and this functions as a grease remaining amount meter as will be described later. Further, the piston rod 5 includes a reduced diameter portion 16 that is grooved on a part of the outer periphery. The axial width of the reduced diameter portion 16 is set larger than the thickness of the rear end surface of the rear cap 3.

  Between the pressure feed piston 7 and the rear cap 3, a pressure feed spring 4 that biases the pressure feed piston 7 in the front end direction with a piston rod 5 as a guide is interposed.

  The front case 2 includes a communication passage 2a that communicates with the application case chamber 8a of the application device unit B at the center. The communication path 2 a is also in communication with the grease nipple 13.

  The coating device portion B is a cylindrical member having both ends open, and is divided into a grease supply port 8c on the front end side and a coating case chamber 8a on the rear end side by a partition wall 17 provided inside.

  As shown in FIG. 2, the partition wall 17 includes a communication hole 18 provided in the center portion, and four nozzles 12 provided around the communication hole 18 at equal intervals in the circumferential direction. Each of the communication hole 18 and the nozzle 12 is a hole for communicating the grease supply port 8c with the application case chamber 8a. The communication hole 18 is a hole through which a later-described grease discharge pin 11 passes, and the nozzle 12 is a passage through which grease flows from the application case chamber 8a to the grease supply port 8c by an operation described later.

  The number of nozzles 12 is not limited to four, and is set according to the consistency of the grease to be used and the size of the tool clamp mechanism. The same applies to the diameter of the nozzle 12.

  A tapered portion 8d whose inner diameter increases from the front end side toward the rear end side is formed on the inner periphery of the grease supply port 8c.

  In the application case chamber 8a, the application piston 9 is slidably accommodated. The application piston 9 includes a grease discharge pin 11 extending in the front end direction along the central axis of the application device portion B, and a guide portion 9a extending in the rear end direction along the central axis. The grease discharge pin 11 passes through the communication hole 18 and projects to the grease supply port 8c. The outer diameter of the guide portion 9a is smaller than the inner diameter of the communication path 2a.

  Further, the application piston 9 includes six flow holes 19 penetrating the application piston 9 at equal intervals in the circumferential direction as shown in FIG. The number of flow holes 19 is not limited to six, and may be formed by cutting out the outer peripheral portion as shown in FIG. The diameter of the flow hole 19 is set according to the consistency of the grease used. For example, when the grease to be used is about 0 or 1 in the JIS classification, the diameter of the flow hole 19 is set to about 2 [mm].

  The flow holes 19 and the nozzles 12 are arranged so that the openings do not overlap each other when the application piston 9 abuts against the partition wall 17.

  Further, the inner periphery of the application case chamber 8a has a stepped shape, and the range equal to or less than the width of the application piston 9 from the front end side of the application case chamber 8a is a small diameter portion, and the rear end side thereof is a large diameter portion. It has become. The diameter of the small diameter portion is set to be slightly larger than the diameter of the application piston 9.

  The coating device portion B is fixed with a locking bolt 14 in a state where a male screw portion 8 b provided at the rear end portion of the coating case 8 is screwed into a female screw portion 2 b provided at the front end portion of the front case 2. When the coating device part B is screwed into the front case 2, an auxiliary spring 10 that biases the application piston 9 with a pressing force in the distal direction is interposed using the guide part 9 a as a guide.

  Next, a grease filling method for the above-described grease coating apparatus A will be described.

  FIG. 5 is a cross-sectional view showing a state where the piston rod 5 is pulled for grease filling of the grease applying apparatus A along the axis as in FIG. FIG. 6 is a view of the rear cap 3 as viewed from the axial direction.

  A hole 20 through which the piston rod 5 can pass is provided in the rear end surface of the rear cap 3. The hole 20 has a shape in which a circular portion 20 a centering on the central axis of the application case 1 and a long hole portion 20 b having a width smaller than the diameter of the circular portion 20 a overlap each other. The width of the long hole portion 20 b is smaller than the outer diameter of the piston rod 5, but larger than the reduced diameter portion 16 of the piston rod 5.

  When filling the grease, the lever 6 is first pulled in the rear end direction against the elastic force of the pressure spring 4, and when the reduced diameter portion 16 reaches the hole 20 of the rear cap, the lever 6 is moved downward to reduce the diameter. The part 16 is fixed to the long hole part 20b.

  When the reduced diameter portion 16 of the piston rod 5 is fixed to the long hole portion 20b of the rear cap 3, the grease is filled from the grease nipple 13 using a grease gun or the like. Thereby, the grease case chamber 1a and the application case chamber 8a are filled with the grease.

  Alternatively, the grease case 1 may be removed from the front case 2 and the grease case chamber 1a may be filled directly with a spatula or the like. Even in this case, the application case chamber 8a can be filled with grease by an operation described later.

  When the grease is filled as described above, the lever 6 is released. As a result, the pressure-feeding piston 7 is pressed in the distal direction by the elastic force of the pressure-feeding spring 4, and a pressing force is generated in the grease in the grease case chamber 1a. Even when the grease case 1 is detached from the front case 2 and only the grease case chamber 1a is filled with grease, the grease pressed by the pressure feeding piston 7 flows into the application case chamber 8a through the communication passage 2a. A pressing force is also generated in the grease in the application case chamber 8a connected via the communication path 2a.

  The piston rod 5 gradually moves toward the distal end as the grease filling amount in the grease applying device A decreases. Therefore, the scale of the piston rod 5 is provided so as to show the maximum value when the grease is fully filled, and become smaller as the lever 6 is approached. The piston rod 5 may be color-coded instead of the scale. For example, a predetermined range in the rear end direction from the reduced diameter portion 16 is painted blue, a predetermined range in the distal direction from the lever 6 is painted red, and an intermediate range thereof is painted in yellow. In this way, it can be determined at a glance whether or not filling is necessary.

  Next, the tool clamp mechanism T of the spindle spindle that supplies grease by the grease applying apparatus A will be described.

  FIG. 7 is a cross-sectional view of the tool clamp mechanism T along the central axis. FIG. 7 shows a state where the tool or the like is not clamped, that is, an unclamped state.

  The main spindle 30 is a cylindrical member having a through hole 30 a along the central axis, and is rotatably supported by a machine tool via a bearing 31. Further, a tapered hole 30 b is formed at the rear end portion of the through hole 30 a, and this tapered hole 30 b is fitted to the tapered portion on the tip side of the application case 8.

  A draw bar 32 is housed in the through hole 30a so as to be movable back and forth on the central axis. The draw bar 32 is urged toward the rear end by a disc spring 36. A lock rod 33 that moves forward and backward integrally with the draw bar 32 is connected to the rear end side of the draw bar 32. A claw 34 is arranged on the outer peripheral side of the lock rod 33. Further, the rear end portion 33b of the lock rod 33 has a cylindrical shape, and the diameter thereof is equal to or smaller than the diameter of the grease discharge pin 11.

  The claw 34 has a plurality of claw portions 34a that can be expanded in the radial direction, and has an engaging portion 34b at the rear end of the claw portion 34a. For example, six claw portions 34a are arranged at equal intervals in the circumferential direction.

  At the time of clamping, the draw bar 32 is pulled toward the distal end against the elastic force of the disc spring 36 by a motor or the like. When the draw bar 32 is pulled in the distal direction, the lock rod 33 is also pulled together in the distal direction. At this time, the cam 33a provided on the lock rod 33 pushes the claw 34a. Further, the distal end portion 33 c of the lock rod 33 spreads the distal end side of the claw 34, and the distal end side of the claw 34 moves radially outward along the inclined portion 35. The engagement part 34b whose diameter is expanded by such an operation is engaged with the engagement part such as a tool, thereby clamping the tool or the like.

  When releasing the clamp, the motor that has pulled the draw bar 32 toward the tip side is stopped. Thereby, the draw bar 32 and the lock rod 33 are moved toward the rear end by the reaction force of the disc spring 36, the diameter of the claw 34 is reduced, and the unclamped state is restored.

  Next, a mechanism for filling the tool clamp mechanism T with grease by the grease applying apparatus A will be described.

  FIGS. 8-10 is a figure which shows the process for making the grease application | coating apparatus A a usable state (initial state), respectively, the state which inserted the grease application | coating apparatus A in the tool clamp mechanism T, and a grease application | coating apparatus The state which clamped A and the state which unclamped the grease application apparatus A are shown. The “initial state” here refers to a state where grease is present in the vicinity of the opening of the nozzle 12 in the application case chamber 8a.

  As shown in FIG. 8, the grease application device A is manually inserted into the tapered hole 30b of the tool clamp mechanism T in the unclamped state from the distal end side. Note that the grease applying apparatus A may be held in a tool rack of a machine tool, and the grease applying apparatus A may be selected by a tool change program.

  When the grease applying device A is inserted into the tool clamp mechanism T, the rear end portion 33b of the lock rod 33 comes into contact with the grease discharge pin 11 and presses the grease discharge pin 11 in the rear end direction as it is. As a result, the application piston 9 moves toward the rear end against the elastic force of the auxiliary spring 10.

  At this time, if grease is filled in the application case chamber 8a, the grease is pressed toward the rear end by the application piston 9, but since the pressing force by the pressure feeding piston 7 is acting from the rear end direction, The grease cannot move from the application case chamber 8a to the grease case 1. However, the grease moves from the rear end side to the front end side of the application piston 9 through the flow hole 19 of the application piston 9 and the gap between the application piston 9 and the inner wall of the application case chamber 8a. It can move in the end direction.

  On the other hand, since the pressing force by the pumping spring 4 is urged toward the tip of the pumping piston 7, the grease in the grease case 1 flows into the application case chamber 8a through the gap between the communication path 2a and the guide portion 9a. .

  The spring constants of the auxiliary spring 10 and the pressure-feeding spring 4 are such that the grease can be pushed out from the nozzle 12 or the communication path 2a if the grease discharge pin 11 is not pressed, and the auxiliary spring 10 contracts during the above-described insertion operation. The pressure feed spring 4 is set so as not to shrink.

  When the grease applying device A is inserted into the tool clamp mechanism T, the tool clamp mechanism T is brought into a clamped state as shown in FIG.

  In the clamped state, the draw bar 32 is pulled in the distal direction, so that the lock rod 33 also moves in the distal direction. As a result, the claw 34 is expanded in the radial direction, the engaging portion 34b engages with the tapered portion 8d, and the grease applying device A is fixed to the spindle spindle.

  When the lock rod 33 moves in the front end direction, the force that has pressed the grease discharge pin 11 in the rear end direction disappears, so that the application piston 9 moves in the front end direction due to the elastic force of the auxiliary spring 10. Thereby, the application piston 9 pushes out the grease in the application case chamber 8a to the grease supply port 8c via the nozzle 12. With this operation, the amount of grease pushed out by the application piston 9 is constant. This is because the stroke of the application piston 9 is constant from the position where it is pushed by the lock rod 33 when the grease application device A is inserted into the tool clamp mechanism T to the tip side surface of the application case chamber 8a.

  When the application piston 9 reaches the tip wall of the application case chamber 8a, the tool clamp mechanism T is brought into an unclamped state as shown in FIG. In FIG. 10, the grease applying apparatus A is detached from the tool clamp mechanism T, but it is not always necessary to remove it.

  When the grease application device A is inserted and the unclamped state is set, the application piston 9 is pushed again toward the rear end as shown in FIG. After that, when separated as shown in FIG. 10, the application piston 9 moves until it comes into contact with the tip surface of the application case chamber 8a. Even if it is not detached, the application piston 9 moves in the same way if it is again clamped.

  By repeating the above-described operations of inserting the grease applying device A into the tool clamp mechanism T, putting it in a clamped state, and unclamping it several times, a grease pool portion G is formed in the vicinity of the nozzle 12 outlet of the grease supply port 8c. To the initial state.

  FIG. 11 is a diagram illustrating a state where the grease applying apparatus A in the initial state is inserted into the tool clamp mechanism T. In this insertion operation, the grease application device A is held on the tool holder in a standby state, and the grease application device A is selected by a tool change program. Thereby, compared with the case where an operator goes to the machine tool and stops the machine tool to perform spray coating, the time required for replenishing the grease can be greatly shortened.

  When the grease application device A in the initial state is inserted into the tool clamp mechanism T, the cam 33a of the lock rod 33, the claw portion 34a of the claw 34, and the periphery thereof enter the grease in the application case chamber 8a. Therefore, when the grease applying apparatus A is subsequently detached from the tool clamp mechanism T, the portion that has entered the grease is in a state where a certain amount of grease has been applied.

  On the other hand, the application | coating piston 9 discharges the grease for 1 stroke to the grease supply port 8c by the operation | movement (insertion-detachment operation | movement) which inserts the grease application | coating apparatus A in the tool clamp mechanism T, and makes it detach | leave after that. That is, if the stroke of the application piston 9 and the diameter of the nozzle 12 are set so that the amount of grease discharged per stroke is equal to the amount of grease taken out to the tool clamp mechanism T by one insertion-removal operation, Each time grease is taken out, the same amount of grease is replenished to the grease supply port 8c. For example, if the carry-out amount in one insertion-removal operation is 1 g, the stroke of the application piston 9 and the diameter of the nozzle 12 are set so that the grease discharge amount is about 1 g per stroke. The stroke of the application piston 9 can be adjusted by the axial length of the grease discharge pin 11.

  Further, the grease is filled in the application case chamber 8a even after the insertion / removal operation. Since the pressing force by the elastic force of the pressure feeding spring 4 acts on the grease in the grease case 1, the coating piston 9 follows the movement of pushing out the grease to the grease supply port 8c, and the pressure feeding piston 7 is applied to the coating case chamber 8a. This is because the grease is pushed out.

  Note that grease can be applied to the tool clamp mechanism only by the insertion / removal operation, but the clamping and unclamping operations may be performed after the insertion as in the case of the initial state.

  In addition, after the grease application is completed, the grease application apparatus A that has been detached from the tool clamp mechanism T is in a state in which the application piston 9 is in contact with the distal end surface of the application case chamber 8a. In this state, as described above, the nozzle 12 and the flow hole 19 are not in communication. That is, the nozzle 12 is closed by the application piston 9. Therefore, the grease does not sag from the nozzle 12 while being held by the tool holder.

  The effect when the grease application device A is held on the tool holder in the standby state and grease is supplied to the tool clamp mechanism T using the tool change program will be described.

  For example, it is assumed that a machining center that performs about 100 cycles per day that requires about 10 tool changes per cycle needs grease replenishment to the tool clamp mechanism T every 1000 cycles.

  In this case, although it depends on the production plan, it is necessary to replenish grease once a week to 10 days, and about 50 greasing operations per year are required. If the amount of grease replenished once, that is, the amount taken out to the tool clamp mechanism T by one insertion / removal operation is about 1 [g], the amount of grease replenished is about 50 [g] annually.

  Therefore, the grease case chamber 1a and the application case chamber 8a are set to a size that can be filled with about 50 [g] of grease, and programmed to perform the above-described insertion / removal operation every 1000 cycles. As a result, if the grease application device A is mounted in the tool holder in the initial state, the grease can be replenished unattended for one year thereafter, and the number of man-hours required for replenishing the grease can be greatly reduced. Of course, if the capacity of the grease case 1a or the like is further increased, it is possible to supply grease unattended for a longer period of time.

  The operation of inserting the grease replenishment by the grease application device A in the initial state into the tool clamp mechanism T may be performed manually. In the case of spray application, it is necessary to apply with the aim of the gap between the cam 33a and the claw portion 34a. However, when using the grease application device A, the grease is accurately replenished simply by inserting it into the tool clamp mechanism T. This is because the working time can be shortened.

  The effects of the above-described embodiment can be summarized as follows.

  (1) The grease application device A includes an application case chamber 8a filled with grease, an application piston 9 that can be moved forward and backward in the application case chamber 8a, an auxiliary spring 10 that presses the application piston 9 in the distal direction, and a partition wall 17 A grease supply port 8c adjacent to the application case chamber 8a, and a grease discharge pin 11 that moves integrally with the application piston 9 and protrudes through the partition wall 17 into the grease supply port 8c. Further, when the coating case chamber 8a and the grease supply port 8c are communicated with each other through the partition wall 17 and inserted into the tool clamp mechanism T, a grease accumulation portion is reached at a position where the sliding portion of the cam 33a and the claw portion 34a reaches. A plurality of nozzles 12 that are open to form G are provided. And a grease pump C that applies a pressing force in the distal direction to the grease in the application case chamber 8a. When inserted into the tool clamp mechanism T, the sliding portion of the cam 33a and the claw portion 34a enters the grease pool portion G, grease is supplied to the sliding portion, and the grease discharge pin 11 is pressed against the lock rod 33. As a result, the application piston 9 moves toward the rear end. When the tool clamp mechanism T is detached or the lock rod 33 is pulled, the application piston 9 pushes the grease in the application case chamber 8a to the grease supply port 8c by the elastic force of the auxiliary spring 10. That is, simply by inserting the grease applying device A into the tool clamp mechanism T and releasing it, the grease can be supplied to the tool clamp mechanism T and replenished with the amount of grease removed by the tool clamp mechanism T. Therefore, it is possible to reduce the man-hour required for supplying the lubricant to the tool clamp mechanism T.

  (2) The grease pump C includes a cylindrical grease case 1 having a communication passage 2 a communicating with the inside of the application case chamber 8 a, a pressure feed piston 7 that can move forward and backward in the grease case 1, and a tip direction of the pressure feed piston 7. And a pressure-feeding spring 4 for applying a pressing force to the head. And the grease is filled in the front end side of the pressure feed piston 7. Thereby, when the application piston 9 pushes out the grease in the application case chamber 8a to the grease supply port 8c, the pressure feeding piston 7 follows the movement of the application piston 9 and transfers the grease in the grease case 1 to the application case chamber 8a. Extrude. That is, when the application piston 9 pushes out grease to the grease supply port 8 c, the same amount of grease is supplied to the application case chamber 8 a by the pressure feeding piston 7.

  (3) Since the opening on the grease supply port 8c side of the nozzle 12 opens at a position facing the oil lubrication site when inserted into the tool clamp mechanism T, the grease can be reliably supplied to the lubrication site.

  (4) Since the application piston 9 is pressed by the auxiliary spring 10 and closes the nozzle 12 in a state of being detached from the tool clamp mechanism T, grease does not leak from the nozzle 12 while being held by the tool holder. .

  (5) One end is connected to the pumping piston 7, and the piston rod 5 penetrating the rear cap 3 has a function as a fuel gauge in which the amount of protrusion from the rear cap 3 changes according to the remaining amount of grease. Thereby, the residual amount of grease can be easily grasped.

  The present invention is not limited to the above-described embodiments, and it goes without saying that various modifications can be made within the scope of the technical idea described in the claims.

1 Grease case (case material)
2 Front case 3 Rear cap 4 Pressure spring (elastic member for pressing)
5 Piston rod (bar-shaped member)
6 Lever 7 Pressure feed piston 8 Application case 9 Application piston 10 Auxiliary spring (elastic member for discharge)
11 Grease discharge pin (lubricating oil discharge pin)
12 Nozzle 13 Grease nipple 17 Bulkhead 19 Flow hole 30 Spindle spindle 32 Drawbar 33 Lock rod (retraction member)
34 Claw A Grease coating device B Coating device section C Grease pump section (pressing force applying means)
T Tool clamp mechanism

Claims (5)

Lubricate the sliding part between the cam part and the claw member that spreads the claw member of the tool clamp mechanism provided on the spindle spindle that holds the tool by expanding the claw member in the radial direction by retracting the drawing member. In the lubricating oil supply device for supplying oil,
An application case chamber filled with lubricating oil;
An application piston that can be moved back and forth in the application case chamber;
An elastic member for discharge that presses the application piston in one direction;
A lubricating oil supply port adjacent to the application case chamber via a partition;
A lubricating oil discharge pin that moves integrally with the application piston, protrudes through the partition wall and protrudes into the lubricating oil supply port;
Communicates with said coating case chamber through transmural the partitions the lubricating oil supply port, wherein the sliding portion when inserted into the tool clamping mechanism of the lubricating oil discharged from the coating case chamber in a position to reach A plurality of nozzles that open to form a pool,
A pressing force applying means for applying a pressing force in the direction of the lubricating oil supply port to the lubricating oil in the coating case chamber;
With
When inserted into the tool clamp mechanism from the lubricating oil supply port side, the sliding portion enters the lubricating oil pool portion to supply lubricating oil to the sliding portion, and the lubricating oil discharge pin is When the retracting member is pressed, the application piston moves away from the partition and is separated from the tool clamp mechanism, or when the retract member is retracted into the tool clamp mechanism, the application piston is discharged from the discharge mechanism. A lubricating oil supply device that pushes out the lubricating oil in the coating case chamber to the lubricating oil supply port by the elastic force of the elastic member for use.   The pressing force applying means includes a cylindrical case member having a communication path communicating with the application case chamber, a pressure feed piston capable of moving forward and backward within the case member, and the pressure feed piston toward the application case chamber. The lubricating oil supply device according to claim 1, further comprising: an elastic member for pressing that applies a pressing force, wherein the lubricating oil is filled into the application case chamber side of the pressure feeding piston.   The lubricating oil supply device according to claim 1 or 2, wherein the openings on the lubricating oil supply port side of the plurality of nozzles open at positions facing the sliding portions when inserted into the tool clamp mechanism.   The lubricating oil supply apparatus according to any one of claims 1 to 3, wherein the application piston is pressed by the discharge elastic member to close the nozzle in a state of being detached from the tool clamp mechanism. The pressing force applying means, the central axis of the casing member and the through the end face opposite to the pressing force applying direction, and one end connected to the supply piston becomes pressed pressure piston integral with said casing member A rod-shaped member that can move forward and backward along
The lubricating oil supply apparatus according to any one of claims 2 to 4, wherein the rod-shaped member functions as a fuel gauge in which a protruding amount from the case member changes according to a remaining amount of lubricating oil.

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