Grease supply device and machine tool

Abstract

The present invention provides a grease supply device and a machine tool that can efficiently supply and replenish grease. [Solution] The grease supply device comprises a housing into which a cartridge filled with grease can be inserted, a shank held in the tool holder of a machine tool, and a dispensing member for dispensing grease. The housing has an opening for inserting the cartridge, provided between the shank and the dispensing member.

Description

Technical Field

[0001] The present invention relates to a grease replenishing device and a machine tool.

Background Art

[0002] A technique for supplying grease to a chuck of a lathe is known.

[0003] As a related technique, Patent Document 1 discloses a chuck grease supply device. The chuck grease supply device described in Patent Document 1 includes a grease supply device. The grease supply device has a grease reservoir provided on a turret tool post and a nozzle. The nozzle moves relative to the grease reservoir when the nozzle is pressed against a grease nipple of the chuck. Further, due to the relative movement, the inside of the grease reservoir and a grease passage provided in the nozzle communicate with each other.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] An object of the present invention is to provide a grease replenishing device and a machine tool capable of efficiently performing grease supply and grease replenishment.

Means for Solving the Problems

[0006] An embodiment of the present invention relates to a grease replenishing device and a machine tool shown below.

[0007] (1) A housing into which a cartridge filled with grease can be inserted, A shank held by a tool holding part of a machine tool, Dispensing member for dispensing the grease and It is equipped with, The housing has an opening for inserting the cartridge, located between the shank and the discharge member. Grease supply device. (2) Further comprising an opening / closing member capable of opening and closing the opening. The grease supply device described in (1) above. (3) The discharge member is A cylinder chamber that communicates with the cartridge and to which the grease is supplied, A piston that is movable relative to the cylinder chamber and Equipped with The grease supply device described in (1) or (2) above. (4) When the piston is pressed by the machine tool element into which the grease is injected, the piston moves relative to the cylinder chamber in a first direction of movement such that the volume of the cylinder chamber decreases. The grease supply device described in (3) above. (5) The relative movement of the piston with respect to the cylinder chamber causes a predetermined amount of the grease in the cylinder chamber to be injected into the machine tool element. The grease supply device described in (3) above. (6) The piston is A nozzle member provided with an outlet for discharging the grease, An internal passage connecting the cylinder chamber and the nozzle member, A valve body arranged in the internal passage, The valve seat and, A biasing member that presses the valve body against the valve seat portion. Equipped with, As the volume of the cylinder chamber decreases, the pressure in the cylinder chamber increases, causing the valve body to move away from the valve seat against the biasing force of the biasing member. A grease supply device as described in any one of (3) to (5) above. (7) When the piston moves relative to the cylinder chamber in a second movement direction opposite to the first movement direction, a certain amount of the grease is supplied from the cartridge to the cylinder chamber. The grease supply device described in (4) above. (8) The longitudinal direction of the housing is not parallel to the longitudinal direction of the cylinder chamber. A grease supply device as described in any one of (3) to (7) above. (9) When the opening / closing member is in the closed position, the cartridge placed inside the housing can be seen from outside the housing. The grease supply device described in (2) above. (10) A workpiece support device that supports the workpiece, A machining head capable of holding a tool, A moving device for moving the machining head relative to the workpiece support device, A grease supply device that can be attached to the aforementioned processing head and It is equipped with, The grease supply device, A housing into which a grease-filled cartridge can be inserted, The shank held by the machining head, Dispensing member for dispensing the grease and Equipped with, The housing has an opening for inserting the cartridge, located between the shank and the discharge member. Machine tools. (11) The device further comprises a calculation device that determines the remaining amount of grease in the cartridge based on the pressing force received by the discharge member from the machine tool element into which the grease is injected. The machine tools described in (10) above. (12) An air supply device that supplies air to the grease supply device, A calculation device that determines the remaining amount of grease in the cartridge based on a signal received from the air supply device. It further comprises The machine tools described in (10) above. (13) The machine tool further includes a tool changer for replacing the tool held by the machining head with the grease supply device. The machine tool according to any one of (10) to (12) above. (14) The machine tool further includes a tool storage device capable of temporarily storing each of the tool and the grease supply device. The machine tool according to any one of (10) to (13) above. (15) The machining head includes a tool rotating device for rotating the tool about an axis along the tool longitudinal direction. The moving device has a tilting device for tilting the machining head about a tilting axis perpendicular to the axis along the tool longitudinal direction. The machine tool according to any one of (10) to (14) above.

Effect of the Invention

[0008] According to the present invention, it is possible to provide a grease supply device capable of efficiently performing grease supply and grease replenishment, and a machine tool.

Brief Description of the Drawings

[0009] [Figure 1] FIG. 1 is a schematic perspective view schematically showing a state before a cartridge is attached to the grease supply device in the first embodiment.< [Figure 2] FIG. 2 is a schematic perspective view schematically showing a state after a cartridge is attached to the grease supply device in the first embodiment. [Figure 3] FIG. 3 is a schematic perspective view schematically showing a state before the grease supply device is attached to the tool holding part. [Figure 4] FIG. 4 is a schematic perspective view schematically showing the machine tool in the first embodiment. [Figure 5] FIG. 5 is an enlarged view showing a part of FIG. 4. [Figure 6] FIG. 6 is a schematic perspective view schematically showing a state before a cartridge is attached to the grease supply device in the second embodiment. [Figure 7] Figure 7 is a schematic perspective view illustrating a portion of the machine tool in the second embodiment. [Figure 8] Figure 8 is a magnified view of a portion of Figure 7. [Figure 9] Figure 9 is a schematic perspective view illustrating a grease supply device in the second embodiment. [Figure 10] Figure 10 is a schematic perspective view showing a grease supply device in a first modified example of the second embodiment. [Figure 11] Figure 11 is a schematic front view illustrating a grease supply device in a second modified example of the second embodiment. [Figure 12] Figure 12 is a schematic cross-sectional view illustrating a grease supply device in the second embodiment. [Figure 13] Figure 13 is a schematic cross-sectional view illustrating a portion of the grease supply device in the second embodiment. [Figure 14] Figure 14 is a schematic plan view illustrating the grease supply device in the second embodiment. [Figure 15] Figure 15 is a schematic side view illustrating the grease supply device in the second embodiment. [Figure 16] Figure 16 is a schematic plan view illustrating the grease supply device in the second embodiment. [Figure 17] Figure 17 is a cross-sectional view taken along the line A1-A1 in Figure 16. [Figure 18] Figure 18 is a magnified view of a portion of Figure 17. [Figure 19] Figure 19 is a schematic cross-sectional view illustrating the state in which a grease supply device is connected to a machine tool element. [Figure 20] Figure 20 is a magnified view of a portion of Figure 19. [Figure 21] Figure 21 is a schematic cross-sectional view illustrating the state in which grease is being supplied from a grease supply device to machine tool elements. [Figure 22] Figure 22 is a magnified view of a portion of Figure 21. [Figure 23] Figure 23 is a schematic cross-sectional view illustrating a state in which the grease supply device is separated from the machine tool elements. [Figure 24] Figure 24 is a schematic diagram illustrating the movement of a piston. [Figure 25] Figure 25 is a schematic cross-sectional view illustrating a grease supply device in the second embodiment. [Figure 26] Figure 26 is a schematic cross-sectional view illustrating a portion of the grease supply device in the second embodiment. [Figure 27] Figure 27 is a schematic cross-sectional view illustrating a grease supply device in a third modified example of the second embodiment. [Figure 28] Figure 28 is a schematic perspective view illustrating a portion of a machine tool in the second embodiment. [Figure 29] Figure 29 is a schematic front view illustrating a machine tool in the second embodiment. [Figure 30] Figure 30 is a schematic front view illustrating a portion of the machine tool in the second embodiment. [Figure 31] Figure 31 is a schematic front view illustrating a portion of a machine tool in the second embodiment. [Figure 32] Figure 32 is a schematic perspective view illustrating a portion of a machine tool in the second embodiment. [Figure 33] Figure 33 is a schematic perspective view illustrating a portion of a machine tool in the second embodiment. [Figure 34] Figure 34 is a schematic diagram of a tool changing device. [Figure 35] Figure 35 is a schematic diagram showing how the control device executes the machining mode. [Figure 36] Figure 36 schematically shows how the control device performs the grease replenishment mode. [Figure 37] Figure 37 schematically shows how the control device executes the grease replenishment mode. [Figure 38]Figure 38 is a schematic perspective view illustrating the grease replenishment mode in operation. [Figure 39] Figure 39 schematically shows how the control device performs the grease replenishment mode. [Figure 40] Figure 40 is a schematic perspective view illustrating the grease replenishment mode in operation. [Figure 41] Figure 41 is a flowchart showing an example of a grease remaining amount determination process. [Figure 42] Figure 42 schematically shows a display prompting the user to replace the cartridge. [Figure 43] Figure 43 is a schematic cross-sectional view illustrating how air is supplied to the grease supply device in a fourth modified example of the second embodiment. [Figure 44] Figure 44 is a schematic cross-sectional view illustrating how air is supplied to the grease supply device in a fourth modified example of the second embodiment. [Figure 45] Figure 45 is a schematic cross-sectional view illustrating how air is supplied to the grease supply device in a fourth modified example of the second embodiment. [Figure 46] Figure 46 is a schematic side view illustrating a grease supply device. [Modes for carrying out the invention]

[0010] The grease supply device 2 and the machine tool 1 in the embodiment will be described below with reference to the drawings. In the following description of the embodiment, parts and components having the same function will be denoted by the same reference numerals, and repeated descriptions of parts and components denoted by the same reference numerals will be omitted.

[0011] (First embodiment) The grease supply device 2A and the machine tool 1A in the first embodiment will be described with reference to Figures 1 to 5. Figure 1 is a schematic perspective view showing the state of the grease supply device 2A in the first embodiment before the cartridge 9 is attached. Figure 2 is a schematic perspective view showing the state of the grease supply device 2A in the first embodiment after the cartridge 9 is attached. Figure 3 is a schematic perspective view showing the state of the grease supply device 2A in the tool holder 121 before it is attached. Figure 4 is a schematic perspective view showing the machine tool 1A in the first embodiment. Figure 5 is an enlarged view of a part of Figure 4.

[0012] As illustrated in Figure 1, the grease supply device 2A in the first embodiment comprises a housing 3, a shank 4, and a discharge member 5 for discharging grease.

[0013] As illustrated in Figure 2, a cartridge 9 filled with grease can be inserted into the housing 3. The housing 3 receives the cartridge 9 filled with grease. The housing 3 has an opening 3a for inserting the cartridge 9. The cartridge 9 is inserted into the housing 3 through the opening 3a.

[0014] As illustrated in Figure 3, the shank 4 is held by the tool holder 121 of the machine tool (more specifically, the tool holder 121 of the machining head 12). Figure 3 shows the state before the shank 4 is held by the tool holder 121 of the machine tool.

[0015] The discharge member 5 includes a discharge port 531a for discharging grease. The grease in the cartridge 9 is supplied to the internal space of the discharge member 5 through the opening 9a of the cartridge 9 (see Figure 1). The grease in the internal space of the discharge member 5 is then discharged from the discharge port 531a.

[0016] In the examples shown in Figures 1 and 2, the opening 3a is provided between the shank 4 and the discharge member 5. In the examples shown in Figures 1 and 2, when the cartridge 9 is attached to the housing 3, the cartridge 9 passes through the opening 3a.

[0017] The grease supply device 2A in the first embodiment is a cartridge-type supply device. Therefore, grease can be replenished simply by replacing the cartridge 9 with a new cartridge. Thus, grease can be easily replenished. In addition, since an opening 3a is provided in the housing 3, it is easy to place the cartridge 9 inside the housing 3.

[0018] The grease supply device 2A in the first embodiment includes a shank 4 held in the tool holder 121 of the machine tool. Therefore, grease can be discharged from the grease supply device 2A held in the tool holder 121. Thus, grease can be easily supplied to the object to which it is applied. In addition, the time required for grease supply is shortened.

[0019] In the example shown in Figure 1, the opening 3a of the housing 3 is provided between the shank 4 and the discharge member 5. Therefore, compared to the case where the cartridge is inserted into the housing 3 through the shank 4 or the discharge member 5, insertion of the cartridge 9 into the housing 3 is easier. Furthermore, when attaching the cartridge 9 to the housing 3, it is not necessary to remove the shank 4 or the discharge member 5 from the housing 3.

[0020] As illustrated in Figure 4, the machine tool 1A in the first embodiment includes (1) a workpiece support device 11 for supporting a workpiece, (2) a machining head 12 capable of holding a tool, (3) a moving device 14 for moving the machining head 12 relative to the workpiece support device 11, and (4) a grease supply device 2A that can be attached to the machining head 12.

[0021] As illustrated in Figure 1, the grease supply device 2A comprises (1) a housing 3 into which a cartridge 9 filled with grease can be inserted, (2) a shank 4 held by the machining head 12, and (3) a discharge member 5 for dispensing grease. The housing 3 also has an opening 3a for inserting the cartridge 9, provided between the shank 4 and the discharge member 5.

[0022] Therefore, the machine tool 1A in the first embodiment has the same effect as the grease supply device 2A in the first embodiment.

[0023] In the example shown in Figure 5, the discharge member 5 can be connected to the machine tool element EL to which grease is applied (for example, the chuck 111 of the workpiece support device 11) by moving the machining head 12 (see dashed arrow AR1). Therefore, grease can be easily supplied to the machine tool element EL to which grease is applied (for example, the chuck 111 of the workpiece support device 11).

[0024] (Optional additional configuration) Next, with reference to Figures 1 to 5, the grease supply device 2A in the first embodiment and optional additional configurations that can be adopted in the machine tool 1A will be described.

[0025] (Cartridge 9) In the example shown in Figure 1, the cartridge 9 has a neck portion 91 that is attached to the housing 3. The neck portion 91 is provided with an opening 9a from which grease is dispensed. The grease supply device 2A may also have an engaging portion 51 that engages with the neck portion 91.

[0026] When the engaging portion 51 of the grease supply device 2A and the neck portion 91 of the cartridge 9 engage, misalignment of the neck portion 91 relative to the housing 3 is prevented. Furthermore, by preventing misalignment, grease is smoothly supplied from inside the cartridge 9 to the grease supply device 2A through the opening 9a provided in the neck portion 91.

[0027] In the example shown in Figure 1, the cartridge 9 (more specifically, the neck portion 91) has a threaded portion 91b (more specifically, a male threaded portion) that screws into the engaging portion 51. The neck portion 91 (more specifically, the threaded portion 91b) of the cartridge 9 screws into the housing 3 (more specifically, into the engaging portion 51).

[0028] When the cartridge 9 is attached to the engaging portion 51 of the grease supply device 2A by screwing, it is easy to attach the cartridge 9 to the grease supply device 2A. Also, it is easy to remove the cartridge 9 from the grease supply device 2A.

[0029] Alternatively, a one-touch detachable cap (not shown) may be used instead of the threaded portion 91b of the neck portion 91 of the cartridge 9. In this case, the cartridge 9 may be attached to the grease supply device 2A by inserting the cap into the engaging portion 51 of the grease supply device 2A. In this case, compared to the case where the neck portion of the cartridge 9 is screwed into the housing 3 by rotating the cartridge 9, it is possible to attach the cartridge 9 to the grease supply device 2A and remove the cartridge 9 from the grease supply device 2A more easily.

[0030] In the example shown in Figure 1, the cartridge 9 includes a bellows container 90 filled with grease. The side wall of the bellows container 90 has a bellows 901. The bellows container 90 contracts as the amount of grease inside the bellows container 90 decreases.

[0031] In the example shown in Figure 2, a bellows container 90, which serves as a cartridge 9, can be inserted into the housing 3. The housing 3 receives the bellows container 90. Furthermore, with the cartridge 9 installed in the housing 3, the side wall of the bellows container 90 (more specifically, the bellows 901) is visible. In this case, with the cartridge 9 installed in the housing 3, the operator can check the remaining amount of grease in the bellows container 90. More specifically, the operator can check the remaining amount of grease in the bellows container 90 by observing the degree of contraction of the bellows container 90.

[0032] (Second embodiment) The grease supply device 2B and the machine tool 1B in the second embodiment will be described with reference to Figures 6 to 46. Figure 6 is a schematic perspective view showing the state of the grease supply device 2B in the second embodiment before the cartridge 9 is attached. Figure 7 is a schematic perspective view showing a part of the machine tool 1B in the second embodiment. Figure 8 is an enlarged view of a part of Figure 7. Figure 9 is a schematic perspective view showing the grease supply device 2B in the second embodiment. Figure 10 is a schematic perspective view showing the grease supply device 2B in the first modified example of the second embodiment. Figure 11 is a schematic front view showing the grease supply device 2B in the second modified example of the second embodiment. Figure 12 is a schematic cross-sectional view showing the grease supply device 2B in the second embodiment. Figure 13 is a schematic cross-sectional view showing a part of the grease supply device 2B in the second embodiment. Figure 14 is a schematic plan view showing the grease supply device 2B in the second embodiment. Figure 15 is a schematic side view illustrating the grease supply device 2B in the second embodiment. Figure 16 is a schematic top view illustrating the grease supply device 2B in the second embodiment. Figure 17 is a cross-sectional view taken along the line A1-A1 in Figure 16. Figure 18 is an enlarged view of a portion of Figure 17. Figure 19 is a schematic cross-sectional view illustrating the state in which the grease supply device 2B is connected to the machine tool element EL. Figure 20 is an enlarged view of a portion of Figure 19. Figure 21 is a schematic cross-sectional view illustrating the state in which grease is being supplied from the grease supply device 2B to the machine tool element EL. Figure 22 is an enlarged view of a portion of Figure 21. Figure 23 is a schematic cross-sectional view illustrating the state in which the grease supply device 2B is separated from the machine tool element EL. Figure 24 is a schematic view illustrating the movement of the piston 53. Figure 25 is a schematic cross-sectional view illustrating the grease supply device 2B in the second embodiment. Figure 26 is a schematic cross-sectional view showing a portion of the grease supply device 2B in the second embodiment. Figure 27 is a schematic cross-sectional view showing the grease supply device 2B in a third modified example of the second embodiment. Figure 28 is a schematic perspective view showing a portion of the machine tool 1B in the second embodiment.Figure 29 is a schematic front view illustrating the machine tool 1B in the second embodiment. Figure 30 is a schematic front view illustrating a portion of the machine tool 1B in the second embodiment. Figure 31 is a schematic front view illustrating a portion of the machine tool 1B in the second embodiment. Figure 32 is a schematic perspective view illustrating a portion of the machine tool 1B in the second embodiment. Figure 33 is a schematic perspective view illustrating a portion of the machine tool 1B in the second embodiment. Figure 34 is a schematic diagram illustrating the tool changer 80. Figure 35 is a schematic diagram illustrating the control device 7 executing machining mode M1. Figure 36 is a schematic diagram illustrating the control device 7 executing grease replenishment mode M2. Figure 37 is a schematic diagram illustrating the control device 7 executing grease replenishment mode M2. Figure 38 is a schematic perspective view illustrating the grease replenishment mode M2 ​​in progress. Figure 39 is a schematic diagram illustrating the control device 7 executing grease replenishment mode M2. Figure 40 is a schematic perspective view showing the grease replenishment mode M2 ​​in operation. Figure 41 is a flowchart showing an example of the grease remaining amount determination process M2-1. Figure 42 is a schematic diagram showing the display 74 with the message MG prompting cartridge replacement. Figures 43 to 45 are schematic cross-sectional views showing how air is supplied to the grease replenishment device 2B in a fourth modification of the second embodiment. Figure 46 is a schematic side view showing the grease replenishment device 2.

[0033] The second embodiment will primarily describe the differences from the first embodiment. On the other hand, the second embodiment will omit repetitive explanations of matters already described in the first embodiment. Therefore, it goes without saying that even if not explicitly explained in the second embodiment, matters already described in the first embodiment can be applied to the second embodiment. Furthermore, matters described in the second embodiment can also be adopted in the first embodiment.

[0034] As illustrated in Figure 6, the grease supply device 2B in the second embodiment comprises (1) a housing 3 into which a cartridge 9 filled with grease can be inserted, (2) a shank 4 held in the tool holder of a machine tool, and (3) a discharge member 5 for discharging grease. In the example shown in Figure 6, the housing 3 has an opening 3a for inserting the cartridge 9, provided between the shank 4 and the discharge member 5.

[0035] Therefore, the grease supply device 2B in the second embodiment has the same effect as the grease supply device 2A in the first embodiment.

[0036] As illustrated in Figure 7, the machine tool 1B in the second embodiment includes (1) a workpiece support device 11 for supporting a workpiece, (2) a machining head 12 capable of holding a tool, (3) a moving device 14 for moving the machining head 12 relative to the workpiece support device 11, and (4) a grease supply device 2B that can be attached to the machining head 12.

[0037] As illustrated in Figure 6, the grease supply device 2B comprises (1) a housing 3 into which a grease-filled cartridge 9 can be inserted, (2) a shank 4 held by the machining head 12, and (3) a discharge member 5 for discharging grease. The discharge member 5 includes a discharge port 531a for discharging grease. In the example shown in Figure 6, the housing 3 has an opening 3a for inserting the cartridge 9, provided between the shank 4 and the discharge member 5.

[0038] Therefore, the machine tool 1B in the second embodiment has the same effect as the grease supply device 2B in the second embodiment.

[0039] In the example shown in Figure 8, the discharge member 5 can be connected to the machine tool element EL to which grease is applied (for example, the chuck 111 of the workpiece support device 11) by moving the machining head 12 (see dashed arrow AR1). Therefore, grease can be easily supplied to the machine tool element EL to which grease is applied (for example, the chuck 111 of the workpiece support device 11).

[0040] (Optional additional configuration) Next, with reference to Figures 1 to 46, we will describe the grease supply device 2A in the first embodiment, the machine tool 1B in the first embodiment, the grease supply device 2B in the second embodiment, and any optional additional configurations that can be adopted in the machine tool 1B in the second embodiment.

[0041] (Cartridge 9) Since cartridge 9 has already been described in the first embodiment, a repeated explanation of cartridge 9 will be omitted.

[0042] (Opening / closing member 21) In the example shown in Figure 6, the grease supply device 2 includes an opening / closing member 21 that can open and close the opening 3a of the housing 3. Figure 6 shows the state in which the opening / closing member 21 is in the open position Q1, which opens the opening 3a. Figure 9 shows the state in which the opening / closing member 21 is in the closed position Q2, which closes the opening 3a.

[0043] If the grease supply device 2 is equipped with an opening / closing member 21, the cartridge 9 will not fall out of the housing 3. In addition, if the grease supply device 2 is equipped with an opening / closing member 21, dust and other debris will not enter the inside of the housing 3 when the grease supply device 2 is stored.

[0044] The opening / closing member 21 may be a swing-type opening / closing member or a sliding-type opening / closing member. In the example shown in Figure 6, the opening / closing member 21 is a swing-type opening / closing member (more specifically, the opening / closing member 21 and the housing 3 are hinged together). In the example shown in Figure 6, the opening / closing member 21 is mounted on the housing 3 so as to be rotatable around the pivot axis AS. The pivot axis AS may be substantially parallel to the extending direction of the shank 4 (more specifically, the central axis AT2 of the shank 4).

[0045] The cross-sectional shape of the opening / closing member 21 in a plane perpendicular to the pivot axis AS may be an arc shape. When the opening / closing member 21 is in the closed position Q2, the housing 3 and the opening / closing member 21 may form a substantially cylindrical shape. The opening / closing member 21 may have a substantially semi-cylindrical shape. The housing 3 may also have a substantially semi-cylindrical shape.

[0046] In the example shown in Figure 8, with the opening / closing member 21 in the closed position Q2, the cartridge 9 (more specifically, the bellows container 90) located inside the housing 3 can be seen from outside the housing 3. In this case, with the opening / closing member 21 in the closed position Q2, the operator can check the remaining amount of grease in the cartridge 9 (more specifically, the remaining amount of grease in the bellows container 90).

[0047] In order to make the cartridge 9, which is located inside the housing 3, visible from outside the housing 3, the opening / closing member 21 may be made of a transparent material.

[0048] Alternatively, or additionally, as illustrated in Figure 10 or Figure 11, a window portion WD for checking the remaining amount of grease in the cartridge 9 (more specifically, the remaining amount of grease in the bellows container 90) may be formed in the housing 3 or the opening / closing member 21. The window portion WD may have an elongated shape (e.g., an elongated hole, a slit). A transparent member may be attached to the window portion WD.

[0049] In the example shown in Figure 10, the opening / closing member 21 has a window WD for checking the remaining amount of grease in the cartridge 9 (more specifically, the remaining amount of grease in the bellows container 90). In the example shown in Figure 11, the housing 3 has a window WD for checking the remaining amount of grease in the cartridge 9 (more specifically, the remaining amount of grease in the bellows container 90).

[0050] In the examples shown in Figures 8, 10, and 11, a bellows container 90, which serves as a cartridge 9, can be inserted into the housing 3. The housing 3 receives the bellows container 90. Furthermore, with the cartridge 9 installed in the housing 3, the side walls of the bellows container 90 (more specifically, the bellows 901) are visible. In this case, with the cartridge 9 installed in the housing 3, the operator can check the remaining amount of grease in the bellows container 90. More specifically, the operator can check the remaining amount of grease in the bellows container 90 by observing the degree of contraction of the bellows container 90.

[0051] (Lock member 22) The grease supply device 2 may include a locking member 22 that maintains the opening / closing member 21 in the closed position. If the grease supply device 2 includes a locking member 22, the cartridge 9 is prevented from falling out of the housing 3.

[0052] In the example shown in Figure 6, the locking member 22 includes a first member 221 positioned on one of the housing 3 and the opening / closing member 21, and a second member 222 positioned on the other of the housing 3 and the opening / closing member 21. The opening / closing member 21 is maintained in the closed position by the engagement of the first member 221 and the second member 222. The first member 221 may include a snap fastener 221a that engages with the second member 222. In this case, the first member 221 and the second member 222 can be engaged by operating the snap fastener 221a in a first operating direction, and the engagement between the first member 221 and the second member 222 can be released by operating the snap fastener 221a in a second operating direction.

[0053] (Inserting cartridge 9 into housing 3) As illustrated in Figure 12, the cartridge 9 is inserted into the housing 3 from the outside of the housing 3 by crossing the opening 3a of the housing 3.

[0054] (Engagement between cartridge 9 and grease supply device 2) In the example shown in Figure 12, the grease supply device 2 includes an engaging portion 51 that engages with the cartridge 9. In the example shown in Figure 12, the engaging portion 51 engages with the neck portion 91 of the cartridge 9. In the example shown in Figure 12, the engaging portion 51 is located on the dispensing member 5. Alternatively, the engaging portion 51 may be located on the housing 3.

[0055] In the example shown in Figure 13, the engaging portion 51 includes a first threaded portion 51a (more specifically, a female threaded portion) that screws into the threaded portion 91b of the cartridge 9 (more specifically, the neck portion 91). When the cartridge 9 is attached to the grease supply device 2 by screwing, the cartridge 9 can be easily attached to the grease supply device 2. It is also easy to remove the cartridge 9 from the grease supply device 2.

[0056] In the example shown in Figure 13, the neck portion 91 of the cartridge 9 and the engaging portion 51 of the grease supply device 2 engage, thereby creating fluid communication between the inside of the cartridge 9 and the grease supply passage PA of the discharge member 5. The grease is, for example, a highly viscous fluid. The grease may have a viscosity that prevents it from dripping from the opening 9a of the cartridge 9 even when the cartridge 9 is inverted.

[0057] A valve is not required in the grease supply passage PA that supplies grease to the cylinder chamber 52r, which will be described later. In this case, pressure loss due to the presence of a valve is avoided, and grease is smoothly supplied from the cartridge 9 to the cylinder chamber 52r. Alternatively, a valve may be provided in the grease supply passage PA that supplies grease to the cylinder chamber 52r. In this case, the bottom of the bellows container 90 may be pressed to increase the grease supply pressure from the cartridge 9. For example, the bottom of the bellows container 90 may be pressed by a spring or by air (see, for example, Figure 43).

[0058] (Arrangement of housing 3 and opening 3a) In the example shown in Figure 14, the longitudinal direction of the housing 3 is parallel to the direction in which the shank 4 extends (more specifically, the direction in which the shank 4 is inserted into the tool holder 121 of the machine tool 1). In this case, the size of the grease supply device 2 can be made more compact when viewed along the central axis AT2 of the shank 4 (see Figure 15).

[0059] In the example shown in Figure 15, the central axis AT1 of the housing 3 is parallel to the central axis AT2 of the shank 4. In this case, the size of the grease supply device 2 can be made more compact when viewed along the central axis AT2 of the shank 4.

[0060] In the example shown in Figure 15, the central axis AT1 of the housing 3 is eccentric with respect to the central axis AT2 of the shank 4. Furthermore, the eccentricity direction of the housing 3 with respect to the central axis AT2 of the shank 4 (more specifically, the eccentricity direction of the central axis AT1 of the housing 3 with respect to the central axis AT2 of the shank 4) is opposite to the eccentricity direction of the discharge port 531a with respect to the central axis AT2 of the shank 4. In this case, the size of the grease supply device 2 when viewed along the central axis AT2 of the shank 4 can be made more compact.

[0061] In the example shown in Figure 15, the central axis AT1 of the housing 3 is located on one side of the plane PL1 containing the central axis AT2 of the shank 4, and the discharge port 531a is located on the other side of the plane PL1 containing the central axis AT2 of the shank 4. In the example shown in Figure 15, when viewed along the central axis AT2 of the shank 4, the direction from the central axis AT2 of the shank 4 toward the central axis AT1 of the housing 3 is opposite to the direction from the central axis AT2 of the shank 4 toward the discharge port 531a.

[0062] In the example shown in Figure 14, the longitudinal direction of the opening 3a is parallel to the direction in which the shank 4 extends (more specifically, the direction in which the shank 4 is inserted into the tool holder 121 of the machine tool 1).

[0063] The length L1 of the housing 3 (see Figure 12) is, for example, 8 cm or more and 35 cm or 10 cm or more and 30 cm or less. However, the length L1 of the housing 3 is not limited to 8 cm or more and 35 cm or less.

[0064] (Discharge member 5) In the example shown in Figure 17, the discharge member 5 is composed of an assembly of multiple parts. In the example shown in Figure 17, the discharge member 5 comprises a cylinder chamber 52r and a piston 53.

[0065] The cylinder chamber 52r communicates with the cartridge 9. More specifically, the cylinder chamber 52r communicates with the cartridge 9 via the grease supply passage PA. Grease is also supplied to the cylinder chamber 52r. In the example shown in Figure 13, the grease supply device 2 includes a grease supply passage PA that supplies grease from the cartridge 9 to the cylinder chamber 52r. In the example shown in Figure 13, the aforementioned engaging portion 51 (more specifically, the first threaded portion 51a) is formed at one end of the grease supply passage PA. Also, in the example shown in Figure 13, the grease supply passage PA is formed in the discharge member 5.

[0066] The piston 53 is movable relative to the cylinder chamber 52r. When the discharge member 5 comprises the piston 53 and the cylinder chamber 52r, the amount of grease discharged is determined based on the movement stroke of the piston 53. Therefore, variations in the amount of grease discharged are suppressed.

[0067] In the examples shown in Figures 19 and 21, the relative movement of the piston 53 with respect to the cylinder chamber 52r causes a predetermined amount of grease in the cylinder chamber 52r to be injected into the machine tool element EL (for example, the chuck 111 of the workpiece support device 11). Therefore, variations in the amount of grease injected into the machine tool element EL are suppressed.

[0068] In the examples shown in Figures 19 and 21, when the piston 53 is pressed by the machine tool element EL into which grease is injected, the piston 53 moves relative to the cylinder chamber 52r such that the volume of the cylinder chamber 52r decreases. In this specification, the direction in which the piston 53 moves relative to the cylinder chamber 52r such that the volume of the cylinder chamber 52r decreases is defined as the first direction of movement MR1. The direction in which the piston 53 moves relative to the cylinder chamber 52r such that the volume of the cylinder chamber 52r increases is defined as the second direction of movement MR2. In the example shown in Figure 19, the second direction of movement MR2 is the opposite direction to the first direction of movement MR1.

[0069] When the piston 53 is driven by the force it receives from the machine tool element EL, a dedicated drive device for driving the piston 53 is unnecessary. Furthermore, the connection structure between the grease supply device 2 and the machining head 12 is not complicated.

[0070] In the example shown in Figure 18, the piston 53 has a tube 534 that enters the cylinder chamber 52r. The tube 534 functions as the piston body. More specifically, the volume of the cylinder chamber 52r changes depending on the length to which the tube 534 enters the cylinder chamber 52r. More specifically, the volume of the cylinder chamber 52r decreases as the tube 534 moves in the direction of entering the cylinder chamber 52r. As the volume of the cylinder chamber 52r decreases, grease moves from the cylinder chamber 52r into the tube 534. The tube 534 constitutes at least a part of the internal passage 533 that connects the cylinder chamber 52r and the nozzle member 531.

[0071] As illustrated in Figure 17, the pipe body 534 may have a small-diameter portion 534s that is inserted into the cylinder chamber 52r and a large-diameter portion 534d that defines the valve chamber 537.

[0072] In the examples shown in Figures 17 and 21, the piston 53 (more specifically, the pipe body 534) is repositionable between a first position P1 and a second position P2 relative to the cylinder chamber 52r. In the example shown in Figure 17, when the piston 53 (more specifically, the pipe body 534) is in the first position P1, the grease supply passage PA and the cylinder chamber 52r are in communication. In the example shown in Figure 21, when the piston 53 (more specifically, the pipe body 534) is in the second position P2, the communication between the grease supply passage PA and the cylinder chamber 52r is blocked.

[0073] The diameter of the cylinder chamber 52r is, for example, 20 mm or less, 15 mm or less, or 12 mm or less.

[0074] In the example shown in Figure 18, the piston 53 comprises a nozzle member 531, an internal passage 533 (more specifically, a pipe 534 defining at least a portion of the internal passage 533), a valve body 535, a valve seat 536, and a biasing member 539. The piston 53 may also have a valve chamber 537 in which the valve body 535 is located.

[0075] The nozzle member 531 is provided with an outlet 531a for discharging grease. In the example shown in Figure 18, the direction from the base end 531b of the nozzle member 531 toward the outlet 531a of the nozzle member 531 is the same direction as the second movement direction MR2 described above.

[0076] The piston 53 is provided with an internal passage 533. The internal passage 533 connects the cylinder chamber 52r (see Figure 17) and the nozzle member 531. The valve body 535 is positioned in the internal passage 533.

[0077] The biasing member 539 (for example, a spring) presses the valve body 535 against the valve seat 536. The valve body 535 moves away from the valve seat 536 against the biasing force of the biasing member 539 due to the increase in pressure in the cylinder chamber 52r as the volume of the cylinder chamber 52r decreases (see Figure 22).

[0078] In the example shown in Figure 18, the biasing force of the biasing member 539 closes the internal passage 533. Also, the valve body 535 separates from the valve seat 536 due to the increase in pressure in the cylinder chamber 52r. Therefore, a dedicated drive device for driving the valve body 535 is not required.

[0079] In the example shown in Figure 18, the grease supply device 2 (more specifically, the piston 53) comprises a nozzle member 531 and a nozzle support 532 that supports the nozzle member 531 so as to be movable relative to it. The grease supply device 2 also comprises a biasing member 539a (e.g., a spring) that biases the nozzle member 531 toward the nozzle support 532. In the example shown in Figure 18, the biasing member 539a biases the nozzle member 531 in the direction from the base end 531b of the nozzle member 531 toward the discharge port 531a of the nozzle member 531. In the example shown in Figure 18, a biasing member 539 (more specifically, a coil spring) is positioned between the nozzle member 531 and the valve body 535. As illustrated in Figure 18, the biasing member 539a that biases the nozzle member 531 may be the same as the biasing member 539 that biases the valve body 535. Alternatively, the biasing member 539a that biases the nozzle member 531 may be different from the biasing member 539 that biases the valve body 535.

[0080] In the examples shown in Figures 18 and 20, the nozzle member 531 is repositionable relative to the nozzle support 532 between an extended position E1 (see Figure 18) and a retracted position E2 (see Figure 20). As illustrated in Figure 20, when the nozzle member 531 is in the retracted position E2, the grease passage 531p within the nozzle member 531 communicates with the valve chamber 537. Also, as illustrated in Figure 18, when the nozzle member 531 is in the extended position E1, communication between the grease passage 531p within the nozzle member 531 and the valve chamber 537 is blocked. In the example shown in Figure 18, the biasing member 539a biases the nozzle member 531 in the direction from the retracted position E2 toward the extended position E1.

[0081] In the example shown in Figure 18, when the nozzle member 531 moves away from the machine tool element EL into which the grease is injected, communication between the valve chamber 537 and the grease passage 531p within the nozzle member 531 is blocked. Also, when the nozzle member 531 moves away from the machine tool element EL into which the grease is injected, communication between the valve chamber 537 and the cylinder chamber 52r is blocked.

[0082] In the example shown in Figure 20, the nozzle support 532 has a pressed surface 532c that is pressed by a machine tool element EL (e.g., the chuck 111 of the workpiece support device 11). In this case, excessive pressing force acting on the nozzle member 531 is prevented. Also in the example shown in Figure 20, the nozzle member 531 is movable relative to the nozzle support 532. In this case, the nozzle member 531 makes proper contact with the grease nipple G of the machine tool element EL, regardless of the protruding length of the grease nipple G.

[0083] Alternatively, the nozzle member 531 may be fixed to the nozzle support 532 so as not to move relative to the nozzle support 532.

[0084] In the example shown in Figure 20, the piston 53 includes a nozzle support 532 (more specifically, a pressed surface 532c) which is pressed in a first movement direction MR1 by a first part of the machine tool element EL (e.g., the outer surface 111u of the chuck jaws), and a nozzle member 531 which is pressed in the first movement direction MR1 by a second part of the machine tool element EL (e.g., a grease nipple G of the chuck jaws). As illustrated in Figure 20, the nozzle member 531 is pressed by a second part of the machine tool element EL (e.g., the grease nipple G of the chuck jaws), causing the nozzle member 531 to move relative to the nozzle support 532. Subsequently, the nozzle support 532 is pressed by a first part of the machine tool element EL (e.g., the outer surface 111u of the chuck jaws), causing the nozzle support 532 to move relative to the cylinder chamber 52r together with the nozzle member 531 (more specifically, the nozzle support 532 and the nozzle member 531 move relative to the cylinder chamber 52r in a first movement direction MR1).

[0085] A seal ring S1 may be placed between the nozzle member 531 and the nozzle support 532. The seal ring S1 prevents grease from leaking through the gap between the nozzle member 531 and the nozzle support 532. It also prevents foreign matter from entering the discharge member 5 through the gap. In the example shown in Figure 20, the seal ring S1 allows relative movement of the nozzle member 531 with respect to the nozzle support 532.

[0086] Because the nozzle member 531 is movable relative to the nozzle support 532, poor connection between the nozzle member 531 and the machine tool element EL is less likely to occur. Because the nozzle member 531 and the nozzle support 532 are movable relative to the cylinder chamber 52r, the pressing force acting on the nozzle support 532 is suitably converted into a force that pushes grease out of the cylinder chamber 52r.

[0087] As illustrated in Figure 19, the nozzle support 532 may be immovable relative to the pipe 534. In the example shown in Figure 19, the nozzle support 532 is fixed to the pipe 534.

[0088] The discharge member 5 (more specifically, the piston 53) may include a guide member 538 (e.g., a guide rod 538r) that guides the relative movement of the pipe 534 with respect to the cylinder chamber 52r. In the example shown in Figure 19, the extending direction of the guide member 538 (e.g., the guide rod 538r) is substantially parallel to the first direction of movement MR1. In the example shown in Figure 19, the guide member 538 is immovable relative to the nozzle support 532.

[0089] The discharge member 5 may have a guide hole 52h that guides the movement of the guide member 538. In the example shown in Figure 19, the discharge member 5 includes a block 52 that defines a cylinder chamber 52r, and the guide hole 52h is formed in the block 52. A grease supply passage PA is also formed in the block 52.

[0090] As illustrated in Figure 19, the discharge member 5 (more specifically, the piston 53) may include a plurality of guide members 538 arranged parallel to each other. The discharge member 5 may also have a plurality of guide holes 52h that guide the movement of the plurality of guide members 538.

[0091] In the example shown in Figure 19, the discharge member 5 includes a biasing member (hereinafter referred to as the "second biasing member 54") that biases the piston 53 away from the cylinder chamber 52r (more specifically, in the second movement direction MR2). As illustrated in Figure 17, the second biasing member 54 maintains the volume of the cylinder chamber 52r at its maximum volume before the piston 53 contacts the machine tool element EL. The second biasing member 54 is, for example, a spring.

[0092] As illustrated in Figure 17, the second biasing member 54 may be positioned in a guide hole 52h formed in the discharge member 5. In the example shown in Figure 17, the second biasing member 54 positioned in the guide hole 52h presses the guide member 538 in the second movement direction MR2. The second biasing member 54 also presses the nozzle support 532 in the second movement direction MR2 via the guide member 538.

[0093] In the examples shown in Figures 19 and 21, when the piston 53 (more specifically, the nozzle support 532) is pressed by the machine tool element EL (e.g., the chuck 111 of the workpiece support device 11), the piston 53 moves relative to the cylinder chamber 52r in the first movement direction MR1 against the biasing force of the second biasing member 54. In this way, the volume of the cylinder chamber 52r decreases and grease is discharged from the discharge port 531a. In the example shown in Figure 22, the grease discharged from the discharge port 531a is injected into the grease nipple G of the machine tool element EL.

[0094] When the grease supply device 2 moves away from the machine tool element EL (for example, the chuck 111 of the workpiece support device 11), the piston 53 moves relative to the cylinder chamber 52r in the second movement direction MR2 due to the biasing force of the second biasing member 54. In this way, the volume of the cylinder chamber 52r increases.

[0095] In the example shown in Figure 23, when the piston 53 (more specifically, the pipe body 534) is in the third position P3, which is between the first position P1 and the second position P2 described above, communication between the grease supply passage PA (see Figure 17) and the cylinder chamber 52r is blocked. Therefore, when the piston 53 (more specifically, the pipe body 534) moves from the second position P2 to the third position P3, the volume of the cylinder chamber 52r increases and the pressure inside the cylinder chamber 52r decreases.

[0096] When the piston 53 (more specifically, the pipe body 534) moves from the third position P3 to the first position P1, the grease supply passage PA and the cylinder chamber 52r communicate again (see Figure 17). Also, grease flows from the grease supply passage PA into the negatively pressurized cylinder chamber 52r. In this way, the cylinder chamber 52r is filled with grease.

[0097] Furthermore, the internal volume of the cartridge 9 decreases due to the inflow of grease into the cylinder chamber 52r (more specifically, the bellows container 90 shrinks).

[0098] In the example shown in Figure 24, when the piston 53 (more specifically, the tube 534) moves relative to the cylinder chamber 52r in a second movement direction MR2 opposite to the first movement direction MR1 (i.e., when it moves relative to the position shown by the solid line and then to the position shown by the dashed line), a certain amount of grease (more specifically, enough grease for one stroke of the piston 53) is supplied from the cartridge 9 to the cylinder chamber 52r via the grease supply passage PA.

[0099] Furthermore, in the examples shown in Figures 17 and 21, when the piston 53 (more specifically, the pipe body 534) moves relative to the cylinder chamber 52r in the first movement direction MR1 (i.e., when it moves relative to the position shown in Figure 17 and the position shown in Figure 21), a certain amount of grease is discharged from the discharge port 531a (more specifically, the amount of grease equivalent to one stroke of the piston 53 is discharged from the discharge port 531a).

[0100] In the examples shown in Figures 17 and 21, the amount of grease dispensed from the outlet 531a in a single burst is determined by the stroke of the piston 53. Therefore, variations in the amount of grease dispensed are suppressed. Furthermore, the amount of grease dispensed from the outlet 531a in a single burst does not depend on whether the cartridge 9 is full or not.

[0101] Figure 25 schematically shows the state in which the length of the cartridge 9 (more specifically, the bellows container 90) is reduced by the reciprocating movement of the piston 53 in one stroke. In Figure 25, the cartridge 9 shown by the dashed line shows the state before the length of the cartridge 9 is reduced, and the cartridge 9 shown by the solid line shows the state after the length of the cartridge 9 is reduced. This reduction in the length of the cartridge 9 (more specifically, the bellows container 90) may be visible from outside the housing 3. For example, the reduction in the length of the bellows container 90 may be visible from outside the housing 3 through the window WD or the transparent opening / closing member 21. In this case, the operator can easily determine the remaining amount of grease in the cartridge 9.

[0102] When the cartridge 9 is installed in the housing 3, air may enter the grease supply passage PA or the cylinder chamber 52r. As illustrated in Figure 26, the grease supply device 2 (more specifically, the discharge member 5) may be provided with an air vent hole 591h to remove air B from the grease supply passage PA or the cylinder chamber 52r. Alternatively, the grease supply device 2 (more specifically, the discharge member 5) may be provided with a cover 591c to close the air vent hole 591h. In this case, the cover 591c is removed from the air vent hole 591h prior to the air bleeding operation. After the air bleeding operation is completed, the cover 591c is attached to the air vent hole 591h. The air vent hole 591h may be located on the central axis of the cylinder chamber 52r.

[0103] Air bleeding is usually not required. However, if air enters the grease supply passage PA or cylinder chamber 52r at a time such as when the grease supply device 2 is attached to the housing 3, air bleeding will be performed.

[0104] (Shank 4) The shank 4 is held by the tool holder 121 of the machine tool 1 (more specifically, the tool holder 121 of the machining head 12). When the shank 4 is held by the tool holder 121, the outer circumferential surface 41 of the shank 4 may be in contact with the inner circumferential surface of the tool holder 121. In the example shown in Figure 25, the shank 4 has an outer circumferential surface 41 that is in contact with the inner circumferential surface of the tool holder 121. The outer circumferential surface 41 may include an inclined surface 41c that approaches the central axis AT2 of the shank 4 as it moves from the base end of the shank 4 (in other words, the part on the housing 3 side) toward the tip of the shank 4. The cross-sectional shape of the shank 4 in a plane perpendicular to the central axis AT2 of the shank 4 may be substantially circular or non-circular.

[0105] The shank 4 may have an inner circumferential surface 42 that can engage with the stud of the tool holder 121 of the machine tool 1. The engagement of the inner circumferential surface 42 of the shank 4 with the tool holder 121 (more specifically, the stud) prevents the shank 4 from falling off the tool holder 121. Alternatively, the shank 4 may have a pull stud that can engage with the tool holder 121.

[0106] The grease supply device 2 may include a flange 61 that is gripped by the tool changer. In the example shown in Figure 25, the flange 61 is located between the shank 4 and the housing 3. The flange 61 may have a groove 61v that engages with the gripping portion of the tool changer.

[0107] In the example shown in Figure 25, the central axis of flange 61 and the central axis AT2 of shank 4 are coaxial. Also, the central axis AT1 of housing 3 (or the central axis of cartridge 9) is eccentric with respect to the central axis of flange 61 (or the central axis AT2 of shank 4).

[0108] In the example shown in Figure 25, the shank 4, flange 61, housing 3, and discharge member 5 are arranged in this order along the central axis AT2 of the shank 4. In the direction along the central axis AT2 of the shank 4, the housing 3 is positioned between the flange 61 (or shank 4) and the discharge member 5.

[0109] (Air discharge nozzle 63) As illustrated in Figure 14, the grease supply device 2 may be equipped with an air discharge nozzle 63. The air discharge nozzle 63 can blow air onto the machine tool element EL (for example, near the grease nipple G of the machine tool element EL). In this way, the machine tool element EL can be cleaned before grease is injected into it.

[0110] As illustrated in Figure 25, at least a portion of the air supply channel 64p that supplies air to the air discharge nozzle 63 may be formed in the flange 61. In this case, air can be supplied from the machining head 12 to the air discharge nozzle 63 via the flange 61.

[0111] In the example shown in Figure 15, the rotational phase of the nozzle member 531 (more specifically, the discharge port 531a) around the central axis AT2 of the shank 4 differs from the rotational phase of the air discharge port 63a of the air discharge nozzle 63 around the central axis AT2 of the shank 4. In this case, after air is blown onto the machine tool element EL, the grease supply device 2 is rotated around the central axis AT2 of the shank 4. Furthermore, the nozzle member 531 is then connected to the grease nipple G of the machine tool element EL, and grease is supplied to the grease nipple G. In the example shown in Figure 15, the rotational phase of the nozzle member 531 (more specifically, the discharge port 531a) around the central axis AT2 of the shank 4 differs by approximately 90 degrees from the rotational phase of the air discharge port 63a of the air discharge nozzle 63 around the central axis AT2 of the shank 4. The difference between the rotational phase of the nozzle member 531 (more specifically, the discharge port 531a) around the central axis AT2 of the shank 4 and the rotational phase of the air discharge port 63a of the air discharge nozzle 63 around the central axis AT2 of the shank 4 may be 45 degrees or more and 180 degrees or less, or 60 degrees or more and 150 degrees or less.

[0112] When the rotational phase of the nozzle member 531 around the central axis AT2 of the shank 4 and the rotational phase of the air discharge nozzle 63 around the central axis AT2 of the shank 4 are different, when each of the two nozzles is positioned facing the machine tool element EL into which grease is injected, each of the two nozzles is less likely to interfere with the wall 19 (see Figure 7) on which the chuck 111 of the workpiece support device 11 is located.

[0113] In the example shown in Figure 7, the machine tool 1 includes a wall 19 (more specifically, a face cover) on which the chuck 111 of the workpiece support device 11 is positioned. The chuck 111 protrudes from the wall 19 in a direction along the first axis AX1, which is the rotation axis of the chuck 111. In the example shown in Figure 7, the grease supply device 2 supplies grease to the chuck 111 positioned on the wall 19 of the machine tool 1.

[0114] In the example shown in Figure 25, the direction of movement of the piston 53 (or the longitudinal direction of the cylinder chamber 52r) is approximately perpendicular to the central axis AT2 of the shank 4. In this case, when grease is supplied to the chuck 111 located on the wall 19, the machining head 12 holding the grease supply device 2 is less likely to interfere with the wall 19. The direction of movement of the piston 53 (or the longitudinal direction of the cylinder chamber 52r) may be inclined with respect to the central axis AT2 of the shank 4. For example, the angle between the direction of movement of the piston 53 and the central axis AT2 of the shank 4 may be 45 degrees or more and less than 90 degrees.

[0115] Alternatively, as illustrated in Figure 27, the direction of movement of the piston 53 may be parallel to the central axis AT2 of the shank 4. In this case, the arrangement of the wall 19 must be changed from the arrangement shown in Figure 7 in order to avoid interference between the machining head 12 holding the grease supply device 2 and the wall 19.

[0116] (The arrangement between the housing 3 and the discharge member 5) In the example shown in Figure 25, the longitudinal direction of the housing 3 (or the longitudinal direction of the cartridge 9 placed inside the housing 3) is not parallel to the longitudinal direction of the cylinder chamber 52r. In this case, the length of the grease supply device 2 can be shortened compared to the case where the longitudinal direction of the housing 3 is parallel to the longitudinal direction of the cylinder chamber 52r (see Figure 27).

[0117] In the example shown in Figure 25, the longitudinal direction of the cylinder chamber 52r is approximately perpendicular to the longitudinal direction of the housing 3 (or the longitudinal direction of the cartridge 9 located inside the housing 3). Alternatively, the longitudinal direction of the cylinder chamber 52r may be inclined with respect to the longitudinal direction of the housing 3 (or the longitudinal direction of the cartridge 9 located inside the housing 3). For example, the angle between the longitudinal direction of the cylinder chamber 52r and the longitudinal direction of the housing 3 (or the longitudinal direction of the cartridge 9 located inside the housing 3) may be 45 degrees or more and less than 90 degrees.

[0118] In the example shown in Figure 25, the housing 3 (or the cartridge 9 located inside the housing 3) and the cylinder chamber 52r overlap when viewed along the central axis AT2 of the shank 4. In this case, the size of the grease supply device 2 in the direction perpendicular to the central axis AT2 of the shank 4 (more specifically, the size of the grease supply device 2 in the direction along the second direction DR2 described later) can be made more compact.

[0119] In this specification, the direction from the shank 4 toward the housing 3 along the central axis AT2 of the shank 4 is defined as the first direction DR1. The direction from the cylinder chamber 52r toward the discharge port 531a along the longitudinal direction of the cylinder chamber 52r is defined as the second direction DR2. In the example shown in Figure 25, the second direction DR2 coincides with the second movement direction MR2 described above. The discharge port 531a may be located on the central axis of the cylinder chamber 52r.

[0120] In the example shown in Figure 25, substantially the entire block 52 in which the cylinder chamber 52r is formed overlaps with the housing 3 when viewed along the first direction DR1. In this case, the size of the grease supply device 2 in the direction perpendicular to the central axis AT2 of the shank 4 can be made compact.

[0121] As illustrated in Figure 25, when viewed in the direction along the second direction DR2, substantially the entire piston 53 may overlap with the block 52 in which the cylinder chamber 52r is formed.

[0122] (Machine tool element EL into which grease is injected) The machine tool element EL to which grease is injected is, for example, a workpiece support device 11 that supports a workpiece. The machine tool element EL to which grease is injected is a chuck 111 (more specifically, the jaws 111b of the chuck 111) that grips the workpiece. Alternatively, the machine tool element EL to which grease is injected may be a workpiece gripper located on the table of a machining center. Alternatively, the machine tool element EL to which grease is injected may be a workpiece gripping jaw of a robot that transports a workpiece.

[0123] In the example shown in Figure 28, a grease nipple G is provided on the jaw 111b of the chuck 111 (more specifically, the master jaw of the chuck 111). In the example shown in Figure 22, the grease nipple G comprises a grease inlet G1, a valve body G2 for opening and closing the grease inlet G1, and a biasing member G3 for biasing the valve body G2 in a direction that closes the grease inlet G1.

[0124] The valve body G2 moves in a direction that opens the grease inlet G1, against the biasing force of the biasing member G3 due to the grease discharged from the nozzle member 531 (more specifically, the discharge port 531a). In this way, grease is injected into the jaws 111b of the chuck 111 through the grease inlet G1. By injecting grease into the jaws 111b, malfunctions of the jaws 111b (for example, a decrease in gripping force, a decrease in gripping accuracy, etc.) are prevented.

[0125] (machine tool 1) In the example shown in Figure 29, the machine tool 1 comprises a workpiece support device 11, a machining head 12, a moving device 14 (for example, a machining head moving device 14a) for moving the machining head 12 relative to the workpiece support device 11, and a grease supply device 2.

[0126] Machine tool 1 may be a lathe, or a multi-tasking machine capable of performing both turning and milling operations. Alternatively, machine tool 1 may be a machining center.

[0127] In the example shown in Figure 30, the workpiece support device 11 includes a chuck 111 that is rotatable around a first axis AX1, a support body 116 that supports the chuck 111 so that it is rotatable around the first axis AX1, and a rotary drive device 118 that rotates the chuck 111 around the first axis AX1.

[0128] In the example shown in Figure 30, the chuck 111 comprises a chuck body 111a and a plurality of jaws 111b attached to the chuck body 111a. The chuck 111 may also include a jaw drive device 114 that moves the plurality of jaws 111b between an open position and a closed position. The jaw drive device 114 moves the plurality of jaws 111b toward the first axis AX1, thereby changing the state of the chuck 111 from an open state to a closed state. When the state of the chuck 111 is closed, the chuck 111 (more specifically, the plurality of jaws 111b) grips the workpiece. On the other hand, the jaw drive device 114 moves the plurality of jaws 111b toward the first axis AX1, thereby changing the state of the chuck 111 from a closed state to an open state.

[0129] The machining head 12 is capable of holding a tool T (for example, a turning tool T1, a milling tool T2, etc.). The machining head 12 may be capable of selectively holding a turning tool T1 (see Figure 31) and a milling tool T2 (see Figure 32). The machine tool 1 may be equipped with a tool changer 80 (see Figure 30) that can change the tool T (for example, a first tool such as a turning tool T1) held in the machining head 12 to another tool (for example, a second tool such as a milling tool) or to a grease supply device 2.

[0130] As illustrated in Figure 32, the machining head 12 may be equipped with a tool rotating device 128 that rotates the tool (for example, a second tool such as a milling tool) around a second axis AX2 along the longitudinal axis of the tool.

[0131] In the example shown in Figure 32, the moving device 14 moves the machining head 12 relative to the workpiece support device 11. The moving device 14 may have a first moving device 141 (e.g., an X-axis motor) that moves the machining head 12 in a direction substantially perpendicular to the first axis AX1 (e.g., along the X-axis substantially parallel to the vertical). The moving device 14 may have a second moving device 142 that moves the machining head 12 in a direction substantially parallel to the first axis AX1 (more specifically, along the Z-axis substantially parallel to the horizontal). The moving device 14 may also have a third moving device 143 that moves the machining head 12 in a direction substantially perpendicular to the first axis AX1 and along the Y-axis, which is different from the direction along the X-axis. In the example shown in Figure 32, the Y-axis is perpendicular to both the X-axis and the Z-axis.

[0132] The moving device 14 may have a tilting device 147 that changes the orientation of the machining head 12 (more specifically, the orientation of the second axis AX2). The tilting device 147 can tilt the tool T (or the grease supply device 2 held in the machining head 12) around a third axis AX3 (see Figure 31) that is substantially parallel to the horizontal plane.

[0133] In the example shown in Figure 29, the moving device 14 has a tilting device 147 that tilts the machining head 12 around a third axis AX3 (in other words, a tilting axis) perpendicular to the second axis AX2 (in other words, an axis along the longitudinal direction of the tool).

[0134] If the moving device 14 has a tilting device 147, the position of the machining head 12 holding the grease supply device 2 can be changed to a position suitable for grease supply. The tilting device 147 may change the position of the machining head 12 between a first position in which the second axis AX2 is perpendicular to the first axis AX1 and a second position in which the second axis AX2 is parallel to the first axis AX1. In the example shown in Figure 30, when the machining head 12 is in the second position, grease can be supplied to the machine tool element EL (e.g., chuck 111) from the grease supply device 2 held in the machining head 12. In the example shown in Figure 31, when the machining head 12 is in the first position, the workpiece W supported by the workpiece support device 11 can be machined using the tool T held in the machining head 12. Additionally, when the machining head 12 is in the first position (see Figure 30), the workpiece W supported by the workpiece support device 11 can be machined using the tool T held in the machining head 12.

[0135] In the example shown in Figure 32, the moving device 14 is capable of moving the machining head 12 in three dimensions. The moving device 14 may also be a device that moves the machining head 12 in two dimensions or one dimension. The moving device 14 may include a workpiece moving device that moves the workpiece W supported by the workpiece support device 11 in a linear manner. The workpiece moving device may also be a device that moves the workpiece support device 11 in a direction along the Z-axis.

[0136] In the example shown in Figure 29, the machine tool 1 includes a wall 15 surrounding the machining area, an opening OP formed in the wall 15, and a door 161 for opening and closing the opening OP.

[0137] As illustrated in Figure 29, the machine tool 1 may be equipped with a tool storage device 85. In the example shown in Figure 33, the tool storage device 85 is capable of temporarily storing the tool T and the grease supply device 2, respectively.

[0138] The tool storage device 85 may also include a transfer device 86 (e.g., a chain and a drive device for driving the chain) for transferring the grease supply device 2 (or tool T) toward the tool changer 80. In the example shown in Figure 33, the tool storage device 85 includes a holder HD capable of holding the shank of the grease supply device 2. The transfer device 86 also transfers the grease supply device 2 (or tool T) toward the tool changer 80 by moving the holder HD.

[0139] In the example shown in Figure 33, the tool storage device 85 includes an opening 87 that allows an operator to access the grease dispenser 2 (or tool T) stored in the tool storage device 85. In this case, the operator can remove the grease dispenser 2 from the tool storage device 85. The operator can also easily replace the used cartridge located in the housing 3 of the grease dispenser 2 with a new cartridge. The tool storage device 85 may also include a door 88 that opens and closes the opening 87.

[0140] As illustrated in Figure 34, the machine tool 1 may be equipped with a tool changer 80. The tool changer 80 replaces the tool T held in the machining head 12 with a grease supply device 2. The tool changer 80 may also replace the tool T held in the machining head 12 with a grease supply device 2 that has been transferred to the tool change position by a transfer device 86 of the tool storage device 85.

[0141] If the machine tool 1 is equipped with a tool changer 80, the attachment of the grease supply device 2 to the machining head 12 is automated. Also, if the machine tool 1 is equipped with a tool changer 80, the removal of the grease supply device 2 from the machining head 12 is automated. If the machine tool 1 is equipped with both a tool changer 80 and a tool storage device 85, the supply of grease to the machine tool element EL (e.g., chuck 111) can be automated.

[0142] The tool changer 80 replaces the grease supply device 2, which is held on the machining head 12, with the tool T. The tool changer 80 may also replace the grease supply device 2, which is held on the machining head 12, with the tool T, which has been moved to the tool change position by the transfer device 86 of the tool storage device 85.

[0143] The tool changer replaces the first tool held in the machining head 12 with the second tool. The tool changer 80 may also replace the first tool held in the machining head 12 with the second tool which has been moved to the tool change position by the transfer device 86 of the tool storage device 85.

[0144] As illustrated in Figure 34, the tool changing device 80 may include a tool changing arm 81. In the example shown in Figure 34, the tool changing device 80 has a first gripping portion 81a and a second gripping portion 81b. In the example shown in Figure 34, the grease supply device 2 is gripped by the first gripping portion 81a. In the example shown in Figure 34, the tool T is gripped by the second gripping portion 81b.

[0145] As illustrated in Figure 34, the tool changing device 80 may include an arm rotating device 82 for rotating the tool changing arm 81 and an arm moving device 83 for moving the tool changing arm 81 linearly. In the example shown in Figure 34, the arm rotating device 82 rotates the tool changing arm 81 around the fourth axis AX4. The arm moving device 83 moves the tool changing arm 81 in a direction along the fourth axis AX4.

[0146] In the example shown in Figure 35, the machine tool 1 includes a control device 7. The machine tool 1 also includes a plurality of controlled devices (for example, the rotary drive device 118, moving device 14, tool changer 80, tool storage device 85, jaw drive device 114, tool rotating device 128, etc.) that are controlled by the control device 7.

[0147] In the example shown in Figure 35, the control device 7 can control the rotary drive device 118 and the moving devices 14 (e.g., the first moving device 141, the second moving device 142, the third moving device 143, and the tilting device 147). Additionally, the control device 7 may be able to control the tool changer 80 and / or the tool storage device 85. The control device 7 may also be able to control the jaw drive device 114. Alternatively, or additionally, the control device 7 may be able to control the tool rotating device 128.

[0148] In the example shown in Figure 35, the control device 7 comprises a memory 71, an arithmetic unit 72, and a communication circuit 73. The control device 7 may also include a display 74 and / or an input device 75.

[0149] As illustrated in Figure 35, the arithmetic unit 72 includes at least one processor 72a (e.g., at least one CPU).

[0150] The control device 7 (more specifically, the arithmetic unit 72) generates a first group of control commands SA by executing the machining program PM. The machine tool 1 operates based on the first group of control commands SA generated when the machining program PM is executed by the control device 7 (more specifically, the arithmetic unit 72). More specifically, the communication circuit 73 transmits the first group of control commands SA to a plurality of controlled devices such as the moving device 14 and the rotary drive device 118, and the plurality of controlled devices that receive the first group of control commands SA operate based on the said first group of control commands SA. In this way, based on the first group of control commands SA generated by the control device 7, the workpiece W supported by the workpiece support device 11 is machined by the tool T (e.g., turning tool T1, milling tool T2, etc.) held in the machining head 12.

[0151] As illustrated in Figure 36, the control device 7 (more specifically, the arithmetic unit 72) may generate a second group of control commands SB by executing a replenishment program PG. The machine tool 1 operates based on the second group of control commands SB generated when the replenishment program PG is executed by the control device 7 (more specifically, the arithmetic unit 72). More specifically, the communication circuit 73 transmits the second group of control commands SB to a plurality of controlled devices such as the moving device 14, the tool changing device 80, and the tool storage device 85, and the plurality of controlled devices that receive the second group of control commands SB operate based on the second group of control commands SB. In this way, grease is replenished to the machine tool element EL by the grease replenishment device 2 held in the machining head 12 based on the second group of control commands SB generated by the control device 7.

[0152] The memory 71 is a storage medium (more specifically, a non-temporary computer-readable storage medium) that can be read by the arithmetic unit 72. The memory 71 may be, for example, a non-volatile or volatile semiconductor memory such as RAM, ROM, or flash memory, or it may be a magnetic disk, or it may be any other type of memory.

[0153] Memory 71 stores programs (e.g., processing program PM, supply program PG) and various data. Memory 71 may be distributed across multiple locations. For example, memory for storing data may be provided separately from memory for storing programs. Memory 71 may include cloud storage accessible via a network.

[0154] In the example shown in Figure 35, the input device 75 includes a touch panel 75a on the display 74. In other words, the display 74 is a display with a touch panel. Note that the input device 75 is not limited to the touch panel 75a on the display 74. For example, the input device 75 may include a button 75b, a switch, a lever, a pointing device such as a mouse, and / or a keyboard.

[0155] In the example shown in Figure 35, the memory 71, the arithmetic unit 72, the display 74, the input device 75, and the communication circuit 73 are connected to each other via a bus 78.

[0156] (Processing mode M1) As illustrated in Figures 31 and 32, the control device 7 can perform a machining mode M1 in which it machines a workpiece W supported by a workpiece support device 11 (e.g., a chuck 111) using a tool T held in the machining head 12.

[0157] More specifically, machining mode M1 includes (1) generating a first group of control commands SA by executing a machining program PM, and (2) transmitting the first group of control commands SA to a plurality of controlled devices (e.g., a moving device 14, a rotary drive device 118, etc.) so that the workpiece W supported by the workpiece support device 11 (e.g., a chuck 111) is machined using a tool T held in the machining head 12. The plurality of controlled devices that receive the first group of control commands SA operate based on the first group of control commands SA. In this way, the workpiece W supported by the workpiece support device 11 is machined by the tool T held in the machining head 12 based on the first group of control commands SA generated by the control device 7.

[0158] Machining mode M1 may include turning a workpiece W supported by a workpiece support device 11 (e.g., a chuck 111) using a turning tool T1 held in the machining head 12. Machining mode M1 may also include milling a workpiece W supported by a workpiece support device 11 (e.g., a chuck 111) using a milling tool T2 held in the machining head 12.

[0159] Machining mode M1 may include machining a workpiece W supported by a workpiece support device 11 (e.g., a chuck 111) using a tool T held in the machining head 12, replacing the tool T held in the machining head 12 with another tool, and machining the workpiece W supported by the workpiece support device 11 (e.g., a chuck 111) using the other tool held in the machining head 12.

[0160] (Grease replenishment mode M2) As illustrated in Figures 37 and 38, the control device 7 can perform a grease supply mode M2 ​​in which grease is supplied to the machine tool element EL (e.g., chuck 111) using a grease supply device 2 held in the machining head 12.

[0161] More specifically, the grease replenishment mode M2 ​​includes (1) generating a second group of control commands SB by executing a replenishment program PG, and (2) transmitting the second group of control commands SB to a plurality of controlled devices (e.g., a moving device 14, a tool changer 80, a tool storage device 85, etc.) so that grease is replenished to the machine tool elements EL (e.g., a chuck 111) using a grease replenishment device 2 held in the machining head 12. The plurality of controlled devices that receive the second group of control commands SB operate based on the second group of control commands SB. In this way, grease is replenished to the machine tool elements EL (e.g., a chuck 111) by the grease replenishment device 2 held in the machining head 12 based on the second group of control commands SB generated by the control device 7.

[0162] As illustrated in Figure 38, the grease supply mode M2 ​​may include supplying grease to the multiple jaws 111b of the chuck 111. More specifically, the grease supply mode M2 ​​may include (1) after grease has been supplied from the grease supply device 2 to the first jaw 111b-1, moving the grease supply device 2 away from the first jaw 111b-1; (2) rotating the chuck 111 around the first axis AX1 using the rotary drive device 118 so that the second jaw 111b-2 faces the grease supply device 2; and (3) moving the machining head 12 holding the grease supply device 2 toward the second jaw 111b-2 so that grease is supplied from the grease supply device 2 to the second jaw 111b-2. Furthermore, the grease supply mode M2 ​​may also include (1) after grease has been supplied from the grease supply device 2 to the second jaw 111b-2, moving the grease supply device 2 away from the second jaw 111b-2; (2) rotating the chuck 111 around the first axis AX1 using the rotary drive device 118 so that the third jaw 111b-3 faces the grease supply device 2; and (3) moving the machining head 12 that holds the grease supply device 2 toward the third jaw 111b-3 so that grease is supplied from the grease supply device 2 to the third jaw 111b-3.

[0163] The grease supply mode M2 ​​may include supplying the first claw 111b-1 with grease equivalent to multiple strokes of the piston 53. More specifically, the grease supply mode M2 ​​may include reciprocating the machining head 12 multiple times relative to the first claw 111b-1 so that the piston 53 reciprocates multiple times relative to the cylinder chamber 52r.

[0164] Grease replenishment mode M2 ​​may include using the tool changer 80 to replace the tool T held in the machining head 12 with the grease replenishment device 2, and using the grease replenishment device 2 held in the machining head 12 to replenish grease to the machine tool element EL (e.g., chuck 111). Grease replenishment mode M2 ​​may also include using the tool storage device 85 and the tool changer 80 to transfer the grease replenishment device 2 stored in the tool storage device 85 to the machining head 12, and using the grease replenishment device 2 attached to the machining head 12 to replenish grease to the machine tool element EL (e.g., chuck 111).

[0165] The grease supply mode M2 ​​may include using an air discharge nozzle 63 to blow air onto the machine tool element EL (e.g., near the grease nipple G of the machine tool element EL) before grease is supplied to the machine tool element EL (e.g., the chuck 111) using a grease supply device 2 held in the machining head 12.

[0166] As illustrated in Figure 36, the control device 7 may also control an air supply device 64 that supplies air to the air discharge nozzle 63 (for example, a valve 64v that opens and closes an air supply passage between the air source and the air discharge nozzle 63). The air supply passage may be arranged to cross the boundary between the end face 129 of the machining head 12 (see Figure 3) and the flange 61 of the grease supply device 2. More specifically, the end face 129 of the machining head 12 may have a supply port 129a that supplies air toward the flange 61 of the grease supply device 2.

[0167] As illustrated in Figures 37 and 38, the second group of control commands SB described above may include a first movement command SB1-1. In this case, the grease supply mode M2 ​​includes the control device 7 transmitting the first movement command SB1-1 to the movement device 14 so that the machining head 12 holding the grease supply device 2 approaches the machine tool element EL (e.g., chuck 111). Upon receiving the first movement command SB1-1, the movement device 14 moves the machining head 12 holding the grease supply device 2 closer to the machine tool element EL (e.g., chuck 111).

[0168] The second group of control commands SB described above may include a first rotation command SB1-2. In this case, the grease replenishment mode M2 ​​includes the control device 7 transmitting the first rotation command SB1-2 to the tool turning device 128 so that the air discharge nozzle 63 faces the machine tool element EL (e.g., chuck 111). Upon receiving the first rotation command SB1-2, the tool turning device 128 positions the air discharge nozzle 63 at an angular position facing the machine tool element EL (e.g., chuck 111).

[0169] The second group of control commands SB described above may include air supply commands SB1-3. In this case, the grease replenishment mode M2 ​​includes the control device 7 transmitting air supply commands SB1-3 to the air supply device 64. Upon receiving the air supply commands SB1-3, the air supply device 64 supplies air to the air discharge nozzle 63 so that air is discharged from the air discharge nozzle 63 to the machine tool element EL (e.g., chuck 111).

[0170] As illustrated in Figure 38, the grease supply mode M2 ​​may include (1) using the moving device 14 to bring the machining head 12 holding the grease supply device 2 closer to the machine tool element EL (e.g., chuck 111), (2) using the tool rotating device 128 to position the air discharge nozzle 63 at an angular position opposite to the machine tool element EL (e.g., chuck 111), and (3) using the air supply device 64 to discharge air from the air discharge nozzle 63 to the machine tool element EL (e.g., chuck 111).

[0171] As illustrated in Figures 39 and 40, the second group of control commands SB described above may include a second rotation command SB2-1. In this case, the grease supply mode M2 ​​includes the control device 7 transmitting the second rotation command SB2-1 to the tool turning device 128 so that the discharge port 531a of the grease supply device 2 faces the machine tool element EL (e.g., chuck 111). Upon receiving the second rotation command SB2-1, the tool turning device 128 positions the discharge port 531a of the grease supply device 2 at an angular position facing the machine tool element EL (e.g., chuck 111) (see Figure 40).

[0172] As illustrated in Figures 39 and 40, the second group of control commands SB described above may include a second movement command SB2-2. In this case, the grease supply mode M2 ​​includes transmitting the second movement command SB2-2 from the control device 7 to the movement device 14 so that the discharge port 531a of the grease supply device 2 contacts the machine tool element EL (e.g., chuck 111) (more specifically, so that the piston 53 of the grease supply device 2 is pressed by the machine tool element EL (e.g., chuck 111)). Upon receiving the second movement command SB2-2, the movement device 14 brings the discharge port 531a of the grease supply device 2 into contact with the machine tool element EL (e.g., chuck 111). Furthermore, the moving device 14, upon receiving the second movement command SB2-2, moves the machining head 12 toward the machine tool element EL (e.g., chuck 111) so that the piston 53, which is pressed by the machine tool element EL (e.g., chuck 111), moves relative to the cylinder chamber 52r in the first movement direction MR1 (see Figures 17, 19, and 21).

[0173] In the examples shown in Figures 17 and 21, the grease supply mode M2 ​​includes moving the machining head 12 holding the grease supply device 2 toward the machine tool element EL (e.g., chuck 111) such that the relative position of the piston 53 (more specifically, the tube 534) with respect to the cylinder chamber 52r is changed from a first position P1 to a second position P2. In this way, a certain amount of grease is discharged from the discharge port 531a toward the machine tool element EL (e.g., chuck 111).

[0174] The second group of control commands SB described above may include a third movement command. In this case, the grease supply mode M2 ​​includes the control device 7 transmitting a third movement command to the movement device 14 so that the discharge port 531a of the grease supply device 2 moves away from the machine tool element EL (e.g., chuck 111). Upon receiving the third movement command, the movement device 14 moves the discharge port 531a (or piston 53) of the grease supply device 2 away from the machine tool element EL (e.g., chuck 111) (see Figure 23). Thus, the supply of grease to the machine tool element EL (e.g., chuck 111) is completed.

[0175] In the example shown in Figure 23, when the discharge port 531a (or piston 53) of the grease supply device 2 moves away from the machine tool element EL (e.g., chuck 111), the relative position of the piston 53 (more specifically, the tubular body 534) with respect to the cylinder chamber 52r changes from the second position P2 to the first position P1. In this way, a fixed amount of grease is supplied from the cartridge 9 to the cylinder chamber 52r.

[0176] The grease replenishment mode M2 ​​may include removing the grease replenishment device 2 from the machining head 12 using the tool changer 80, and transferring the grease replenishment device 2 to the storage position in the tool storage device 85 using the tool changer 80 and the tool storage device 85.

[0177] The grease replenishment mode M2 ​​may include replacing the grease replenishment device 2, which is held on the machining head 12, with the tool T using the tool changing device 80.

[0178] (Grease remaining amount determination process M2-1) The machine tool 1 (more specifically, the arithmetic unit 72) may be capable of performing a grease remaining amount determination process M2-1 to determine the remaining amount of grease in the cartridge 9. The arithmetic unit 72 that performs the grease remaining amount determination process M2-1 may be the arithmetic unit of the control device 7, or it may be the arithmetic unit of another computer.

[0179] Let's consider the case where the amount of grease remaining in cartridge 9 is low. In this case, when the relative position of the piston 53 (more specifically, the tube 534) with respect to the cylinder chamber 52r changes from the second position P2 to the first position P1 (see Figure 23), less than a certain amount of grease is supplied to the cylinder chamber 52r. As a result, the pressure in the cylinder chamber 52r becomes negative.

[0180] Let's consider the case where the next grease replenishment is performed in this state. More specifically, let's consider the case where the piston 53, which is pressed by the machine tool element EL (for example, the chuck 111), presses against the machine tool element EL such that it moves relative to the cylinder chamber 52r in the first movement direction MR1 (see Figure 41). Because the pressure in the cylinder chamber 52r is negative, the pressing force received by the discharge member 5 from the machine tool element EL is relatively low.

[0181] The calculation unit 72 determines the remaining amount of grease in the cartridge 9 based on the pressing force that the discharge member 5 receives from the machine tool element EL (e.g., chuck 111) into which the grease is injected. More specifically, as illustrated in Figure 41, when the pressing force is equal to or greater than a predetermined threshold, the calculation unit 72 determines that there is sufficient grease remaining in the cartridge 9. On the other hand, when the pressing force is less than the predetermined threshold, the calculation unit 72 determines that there is insufficient grease remaining in the cartridge 9.

[0182] In the example shown in Figure 41, the grease remaining amount determination process M2-1 includes determining the remaining amount of grease in the cartridge 9 based on the pressing force received by the discharge member 5 (more specifically, the piston 53) from the machine tool element EL into which the grease is injected.

[0183] While the control device 7 is executing the grease replenishment mode M2 ​​described above, the arithmetic unit 72 may execute the grease remaining amount determination process M2-1. In this case, since it is determined whether or not there is enough grease remaining in the cartridge while the grease replenishment mode M2 ​​is being executed, the operator can quickly replace the cartridge 9 in the housing 3 with a new cartridge.

[0184] As illustrated in Figure 42, if the grease level determination process M2-1 determines that the amount of grease remaining in cartridge 9 is low, a message MG prompting the replacement of cartridge 9 may be displayed on the display 74. In this case, the operator can easily understand the need to replace cartridge 9.

[0185] The grease replenishment mode M2 ​​may include determining the remaining amount of grease in the cartridge 9 based on the pressing force received by the discharge member 5 from the machine tool element EL (e.g., chuck 111) into which the grease is injected, and, when it is determined that the remaining amount of grease in the cartridge 9 is low, displaying a message on the display 74 prompting the replacement of the cartridge 9.

[0186] In the grease remaining amount determination process M2-1 described above, if it is determined that the amount of grease remaining in the cartridge 9 is low, the control device 7 may interrupt the execution of the grease replenishment mode M2 ​​(more specifically, the control device 7 may interrupt the movement of the machining head 12 toward the machine tool element EL toward which the grease is replenished). Furthermore, after the execution of the grease replenishment mode M2 ​​is interrupted, the control device 7 may control the moving device 14, the tool changing device 80, and the tool storage device 85 so that the grease replenishment device is returned to the tool storage device 85.

[0187] The pressing force that the discharge member 5 receives from the machine tool element EL (e.g., chuck 111) may be derived by the control device 7 based on the force acting on the moving device 14. More specifically, the control device 7 monitors the force acting on the feed axis (more specifically, the X-axis) that moves the grease supply device 2 (more specifically, the current value of the X-axis motor). Also, when the grease supply mode M2 ​​is executed, the control device 7 acquires the force acting on the feed axis (more specifically, the X-axis) that moves the grease supply device 2 (more specifically, the current value of the X-axis motor) as the force corresponding to the pressing force that the discharge member 5 (more specifically, the piston 53) receives from the machine tool element EL (e.g., chuck 111). When the force acting on the feed axis (more specifically, the X-axis) that moves the grease supply device 2 (more specifically, the current value of the X-axis motor) is below a predetermined threshold, the control device 7 determines that the amount of grease remaining in the cartridge 9 is low.

[0188] When the pressing force received by the discharge member 5 from the machine tool element EL (e.g., chuck 111) is derived by the control device 7 based on the force acting on the moving device 14, there is no need to provide a dedicated sensor to detect the pressing force. For example, there is no need to provide a sensor to detect the pressing force in the grease supply device 2. Therefore, the configuration of the grease supply device 2 is not complicated. Furthermore, when the grease supply device 2 is added to an existing machine tool, there is no need to mechanically modify the machine tool in order to perform the grease remaining amount determination process M2-1 (it is only necessary to incorporate a program to perform the grease remaining amount determination process M2-1).

[0189] Alternatively, the grease supply device 2 may be equipped with a sensor to detect the pressing force. In this case, based on the signal received from the sensor, the calculation device 72 derives the pressing force received by the discharge member 5 from the machine tool element EL (e.g., chuck 111).

[0190] The grease remaining amount determination process is not limited to the examples described above. For example, as illustrated in Figure 43, the machine tool 1 may include (1) an air supply device 64A that supplies air to the grease supply device 2, and (2) a calculation device 72 that determines the remaining amount of grease in the cartridge 9 based on a signal received from the air supply device 64A (for example, a signal received from the pressure switch 648a of the air supply device 64A).

[0191] A portion of the air supply device 64A may be shared with a portion of the air supply device 64 that supplies air to the air discharge nozzle 63.

[0192] In the example shown in Figure 43, the grease supply device 2 includes a cylinder chamber that receives air from the air supply device 64 (hereinafter referred to as the "second cylinder chamber 67"), a piston located in the second cylinder chamber 67 (hereinafter referred to as the "second piston 68"), and a communication port 69 that connects the second cylinder chamber 67 to the outside of the grease supply device 2.

[0193] In the example shown in Figure 43, the air supply device 64A includes an air source 641, an air passage FP connecting the air source 641 and the second cylinder chamber 67, a regulator 642 for reducing the pressure of the air in the air passage FP to a predetermined pressure, and a sensor 648 (for example, a pressure switch 648a) for detecting the pressure in the second cylinder chamber 67.

[0194] As illustrated in Figures 43 and 44, when air is supplied to the second cylinder chamber 67 from the air supply device 64A, the second piston 68 comes into contact with the cartridge 9 (more specifically, the bottom of the bellows container 90). Furthermore, the position of the second piston 68 after air is supplied to the second cylinder chamber 67 from the air supply device 64A changes according to the amount of grease remaining in the cartridge 9.

[0195] More specifically, when there is sufficient grease remaining in cartridge 9, the position of the second piston 68 is such that it blocks the communication port 69 (see Figure 43). Therefore, when there is sufficient grease remaining in cartridge 9, a closed circuit is formed by the flow path from regulator 642 to the second cylinder chamber 67 and the second cylinder chamber 67, so the pressure switch 648a can detect the pressure reduced to a predetermined pressure by regulator 642 (more specifically, a predetermined pressure higher than atmospheric pressure). In this case, based on the signal received from pressure switch 648a, the calculation unit 72 determines that there is sufficient grease remaining in cartridge 9. In the example shown in Figure 43, air from air source 641 is reduced in pressure by regulator 642, and the reduced-pressure air is supplied to the second cylinder chamber 67. When the closed circuit described above reaches a predetermined pressure, regulator 642 stops supplying air to the second cylinder chamber 67. The sensor 648 (more specifically, the pressure switch 648a) detects the predetermined pressure, and the computing unit 72 determines, based on the signal received from the sensor 648 (more specifically, the pressure switch 648a), that there is sufficient grease remaining in the cartridge 9.

[0196] On the other hand, when the amount of grease remaining in cartridge 9 is low, the position of the second piston 68 is such that it opens the communication port 69 (see Figure 44). Therefore, when the amount of grease remaining in cartridge 9 is low, even if air is supplied to the second cylinder chamber 67 from the air supply device 64, the flow path beyond the regulator 642 is open to the atmosphere (in other words, the flow path beyond the regulator 642 is not a closed circuit), so the sensor 648 cannot detect the pressure reduced to a predetermined pressure by the regulator 642 (more specifically, a predetermined pressure higher than atmospheric pressure). As illustrated in Figure 44, when the position of the second piston 68 moves to the position that opens the communication port 69, the flow path beyond the regulator 642 is open to the atmosphere, so the sensor 648 detects the pressure drop. Even when air is supplied to the second cylinder chamber 67 with the communication port 69 open, the pressure in the flow path beyond the regulator 642 is maintained at a level lower than the predetermined pressure. The sensor 648 (more specifically, the pressure switch 648a) is unable to detect the predetermined pressure, and the computing unit 72 determines, based on the signal received from the sensor 648 (more specifically, the pressure switch 648a), that the amount of grease remaining in the cartridge 9 is low.

[0197] In the examples shown in Figures 43 and 44, a regulator 642 is located in the air passage FP connecting the air source 641 and the second cylinder chamber 67. Alternatively (see Figure 45), or additionally, a valve 643 may be located in the air passage FP connecting the air source 641 and the second cylinder chamber 67. In the example shown in Figure 45, when the pressure in the closed circuit described above reaches a predetermined pressure (for example, when the pressure switch 648a detects that the pressure in the closed circuit described above has reached a predetermined pressure), the state of the valve 643 is changed from open to closed. After the state of the valve 643 is changed to closed, if the pressure in the closed circuit described above is maintained at the predetermined pressure, the calculation unit 72 determines, based on the signal received from the sensor 648 (more specifically, the pressure switch 648a), that there is sufficient grease remaining in the cartridge 9. On the other hand, if the pressure in the flow path beyond the regulator 642 cannot be raised to a predetermined pressure, or if the pressure in the flow path beyond the regulator 642 is not maintained at a predetermined pressure after the valve 643 is closed, the calculation unit 72 determines, based on the signal received from the sensor 648 (more specifically, the pressure switch 648a), that the amount of grease remaining in the cartridge 9 is low.

[0198] In the examples shown in Figures 43 to 45, the calculation unit 72 determines the remaining amount of grease in the cartridge 9 based on the signal received from the sensor 648 (more specifically, the pressure switch 648a). For example, when the pressure in the second cylinder chamber 67 is above a threshold, the pressure switch 648a transmits a first signal to the calculation unit 72. When the calculation unit 72 receives the first signal from the pressure switch 648a, the calculation unit 72 determines that there is sufficient grease remaining in the cartridge 9. On the other hand, when the pressure in the second cylinder chamber 67 is below a threshold, the pressure switch 648a does not transmit the first signal to the calculation unit 72. When the calculation unit 72 does not receive the first signal from the pressure switch 648a, the calculation unit 72 determines that there is little grease remaining in the cartridge 9.

[0199] The arithmetic unit 72 may be the arithmetic unit of the control device 7, or it may be the arithmetic unit of another computer.

[0200] In the examples shown in Figures 43 to 45, the grease remaining amount determination process M2-1 includes determining the remaining amount of grease in the cartridge 9 based on a signal received from the air supply device 64A (more specifically, a sensor such as a pressure switch 648a).

[0201] When the control device 7 is executing the grease replenishment mode M2 ​​described above (for example, after grease has been supplied from the cartridge 9 to the cylinder chamber 52r), the calculation unit 72 may execute the grease remaining amount determination process M2-1. In this case, since it is determined whether or not there is enough grease remaining in the cartridge while the grease replenishment mode M2 ​​is being executed, the operator can quickly replace the cartridge 9 in the housing 3 with a new cartridge. Note that when changing tools or cartridges, the supply of air from the air source 641 to the second cylinder chamber 67 is stopped. For example, when attaching the grease replenishment device 2 to the machining head 12 (more specifically, when attaching the grease replenishment device 2 to the machining head 12 using the tool changing device 80), the air source 641 is deactivated or the valve 643 is closed. Furthermore, when the grease supply device 2 is attached to the machining head 12 and the cartridge 9 installed in the grease supply device 2 is replaced with another cartridge, the air source 641 is deactivated or the valve 643 is closed.

[0202] As illustrated in Figure 42, if the grease level determination process M2-1 determines that the amount of grease remaining in cartridge 9 is low, a message MG prompting the replacement of cartridge 9 may be displayed on the display 74. In this case, the operator can easily understand the need to replace cartridge 9.

[0203] (An example of grease replenishment procedure) As the discharge member 5 is pressed against the chuck 111, the piston 53 is pushed into the cylinder chamber 52r (see Figures 21 and 22). Since the cylinder chamber 52r is in communication with the internal passage 533, grease moves from the cylinder chamber 52r to the internal passage 533. The grease that has moved into the internal passage 533 moves the valve body 535 from the closed position to the open position against the biasing force of the biasing member 539. In this way, grease equivalent to one stroke of the piston 53 flows into the grease nipple G of the chuck 111 (more specifically, the grease nipple G of the claw 111b) via the discharge port 531a. After the grease injection is complete, the biasing force of the biasing member 539 returns the valve body 535 to its original closed position, and the biasing force of the second biasing member 54 causes the piston 53 to retract from the cylinder chamber 52r (see Figure 23). As the piston 53 retracts from the cylinder chamber 52r, negative pressure is created in the cylinder chamber 52r. After the piston 53 crosses the grease supply passage PA, the cylinder chamber 52r and the inside of the cartridge 9 are connected via the grease supply passage PA. Also, because the cylinder chamber 52r is under negative pressure, enough grease for one stroke of the piston 53 is drawn from the cartridge 9 into the cylinder chamber 52r via the grease supply passage PA.

[0204] (Size of grease supply device 2) In the example shown in Figure 46, the entire grease supply device 2, when viewed along the central axis AT2 of the shank 4, fits inside a virtual cylinder HC with a radius of 90 mm (or 80 mm, or 70 mm) centered on the central axis AT2. When the size of the grease supply device 2, when viewed along the central axis AT2 of the shank 4, is sufficiently small, it is easy to replace the grease supply device 2 using the tool changing device 80. Also, when the size of the grease supply device 2, when viewed along the central axis AT2 of the shank 4, is sufficiently small, it is easy to store the tool in the tool storage device 85.

[0205] The length L2 of the grease supply device 2 in the direction along the central axis AT2 of the shank 4 (see Figure 25) is, for example, 15 cm or more and 50 cm or 20 cm or more and 40 cm or less. When the length L2 of the grease supply device 2 in the direction along the central axis AT2 of the shank 4 is sufficiently small, it is easy to replace the grease supply device 2 using the tool changing device 80. Also, when the length L2 of the grease supply device 2 in the direction along the central axis AT2 of the shank 4 is sufficiently small, it is easy to store the tool in the tool storage device 85.

[0206] The present invention is not limited to the embodiments or modifications described above, and it is clear that each embodiment or modification can be appropriately modified or changed within the scope of the technical concept of the present invention. Furthermore, the various technologies used in each embodiment or modification can be applied to other embodiments or other modifications, as long as no technical inconsistencies arise. In addition, any optional additional configurations in each embodiment or modification can be omitted as appropriate. [Explanation of Symbols]

[0207] 1, 1A, 1B... Machine tool, 2, 2A, 2B... Grease supply device, 3... Housing, 3a... Opening, 4... Shank, 5... Discharge member, 7... Control device, 9... Cartridge, 9a... Opening, 11... Workpiece support device, 12... Machining head, 14... Moving device, 14a... Machining head moving device, 15... Wall, 19... Wall, 21... Opening / closing member, 22... Locking member, 41... Outer surface, 41c... Inclined surface, 42... Inner surface, 51... Engaging part, 51a... First threaded part, 52... Block, 52h... Guide hole, 52r... Cylinder chamber, 53... Piston, 54... Second biasing member, 61... Flange, 61v... Groove, 63 ...Air discharge nozzle, 63a...Air discharge port, 64...Air supply device, 64A...Air supply device, 64p...Air supply passage, 64v...Valve, 67...Second cylinder chamber, 68...Second piston, 69...Communication port, 71...Memory, 72...Calculation unit, 72a...Processor, 73...Communication circuit, 74...Display, 75...Input device, 75a...Touch panel, 75b...Button, 78...Bus, 80...Tool changer, 81...Tool changer arm, 81a...First gripping part, 81b...Second gripping part, 82...Arm rotation device, 83...Arm movement device, 85...Tool storage device, 86...Transfer device, 87...Opening Part, 88...Door, 90...Bellows container, 91...Neck part, 91b...Screw part, 111...Chuck, 111a...Chuck body, 111b...Jaws, 111b-1...First jaw, 111b-2...Second jaw, 111b-3...Third jaw, 111u...Outer surface, 114...Jaw drive device, 116...Support, 118...Rotating drive device, 121...Tool holder, 128...Tool rotating device, 129...End face, 129a...Feed port, 141...First moving device, 142...Second moving device, 143...Third moving device, 147...Tilting device, 161...Door, 221...First member, 221a...Snap fastener, 222...Second member, 531...Nozzle member, 531a...Discharge port, 531b...Base end, 531p...Grease passage, 532...Nozzle support, 532c...Pressed surface, 533...Internal passage, 534...Tube body, 534d...Large diameter section, 534s...Small diameter section, 535...Valve body, 536...Valve seat section, 537...Valve chamber, 538...Guide member, 538r...Guide rod, 539...Biasing member, 539a...Biasing member, 591c...Lid, 591h...Air vent hole, 641...Air source, 642...Regulator, 643...Valve, 648...Sensor, 648a...Pressure switch, 901...Bellows, AS...Rotating shaft, AT1...Central axis of housing,AT2...Shank central axis, AX1...First axis, AX2...Second axis, AX3...Third axis, AX4...Fourth axis, B...Air, DR1...First direction, DR2...Second direction, E1...Advance position, E2...Retracted position, EL...Machine tool element, FP...Air passage, G...Grease nipple, G1...Grease inlet, G2...Valve body, G3...Biasing member, HC...Virtual cylinder, HD...Holder, M1...Machining mode, M2...Grease replenishment mode, M2-1...Grease remaining amount determination process, MG...Message, MR1...First movement direction, MR2...Second movement direction, O P...Opening, P1...First position, P2...Second position, P3...Third position, PA...Grease supply passage, PG...Replenishment program, PL1...Plane containing the central axis of the shank, PM...Machining program, Q1...Open position, Q2...Closed position, S1...Seal ring, SA...Control command, SB...Control command, SB1-1...First movement command, SB1-2...First rotation command, SB1-3...Air supply command, SB2-1...Second rotation command, SB2-2...Second movement command, T...Tool, T1...Turning tool, T2...Milling tool, W...Workpiece, WD...Window section

Claims

1. A housing into which a grease-filled cartridge can be inserted, The shank is held in the tool holder of the machine tool, Dispensing member for dispensing the grease and It is equipped with, The housing has an opening for inserting the cartridge, located between the shank and the discharge member. Grease supply device.

2. The system further comprises an opening / closing member capable of opening and closing the aforementioned opening. The grease supply device according to claim 1.

3. The aforementioned discharge member is A cylinder chamber that communicates with the cartridge and to which the grease is supplied, A piston that is movable relative to the cylinder chamber and Equipped with The grease supply device according to claim 1 or 2.

4. When the piston is pressed by the machine tool element into which the grease is injected, the piston moves relative to the cylinder chamber in a first direction of movement such that the volume of the cylinder chamber decreases. The grease supply device according to claim 3.

5. The relative movement of the piston with respect to the cylinder chamber causes a predetermined amount of the grease in the cylinder chamber to be injected into the machine tool element. The grease supply device according to claim 3.

6. The aforementioned piston is A nozzle member provided with an outlet for discharging the grease, An internal passage connecting the cylinder chamber and the nozzle member, A valve body arranged in the internal passage, The valve seat and, A biasing member that presses the valve body against the valve seat portion. Equipped with, As the volume of the cylinder chamber decreases, the pressure in the cylinder chamber increases, causing the valve body to move away from the valve seat against the biasing force of the biasing member. The grease supply device according to claim 3.

7. When the piston moves relative to the cylinder chamber in a second movement direction opposite to the first movement direction, a certain amount of grease is supplied from the cartridge to the cylinder chamber. The grease supply device according to claim 4.

8. The longitudinal direction of the housing is non-parallel to the longitudinal direction of the cylinder chamber. The grease supply device according to claim 3.

9. When the opening / closing member is in the closed position, the cartridge, which is located inside the housing, can be seen from outside the housing. The grease supply device according to claim 2.

10. A workpiece support device that supports the workpiece, A machining head capable of holding a tool, A moving device for moving the machining head relative to the workpiece support device, A grease supply device that can be attached to the aforementioned processing head and It is equipped with, The grease supply device, A housing into which a grease-filled cartridge can be inserted, The shank held by the machining head, Dispensing member for dispensing the grease and Equipped with, The housing has an opening for inserting the cartridge, located between the shank and the discharge member. Machine tools.

11. The system further comprises a calculation device that determines the remaining amount of grease in the cartridge based on the pressing force received by the discharge member from the machine tool element into which the grease is injected. The machine tool according to claim 10.

12. An air supply device that supplies air to the grease supply device, A calculation device that determines the remaining amount of grease in the cartridge based on a signal received from the air supply device. It further comprises The machine tool according to claim 10.

13. The system further comprises a tool changing device for replacing the tool held in the machining head with the grease supply device. A machine tool according to any one of claims 10 to 12.

14. The system further comprises a tool storage device capable of temporarily storing the aforementioned tools and the aforementioned grease supply device. A machine tool according to any one of claims 10 to 12.

15. The machining head is equipped with a tool rotating device that rotates the tool around an axis along the longitudinal direction of the tool, The moving device includes a tilting device that tilts the machining head around a tilting axis perpendicular to the axis along the longitudinal direction of the tool. A machine tool according to any one of claims 10 to 12.

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