WO2017217227A1 - グリス交換方法およびグリス吸引装置 - Google Patents
グリス交換方法およびグリス吸引装置 Download PDFInfo
- Publication number
- WO2017217227A1 WO2017217227A1 PCT/JP2017/020021 JP2017020021W WO2017217227A1 WO 2017217227 A1 WO2017217227 A1 WO 2017217227A1 JP 2017020021 W JP2017020021 W JP 2017020021W WO 2017217227 A1 WO2017217227 A1 WO 2017217227A1
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- WIPO (PCT)
- Prior art keywords
- grease
- air
- suction
- chamber
- gear
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16N—LUBRICATING
- F16N31/00—Means for collecting, retaining, or draining-off lubricant in or on machines or apparatus
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16N—LUBRICATING
- F16N11/00—Arrangements for supplying grease from a stationary reservoir or the equivalent in or on the machine or member to be lubricated; Grease cups
- F16N11/10—Arrangements for supplying grease from a stationary reservoir or the equivalent in or on the machine or member to be lubricated; Grease cups by pressure of another fluid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
- B25J19/00—Accessories fitted to manipulators, e.g. for monitoring, for viewing; Safety devices combined with or specially adapted for use in connection with manipulators
- B25J19/0062—Lubrication means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
- B25J19/00—Accessories fitted to manipulators, e.g. for monitoring, for viewing; Safety devices combined with or specially adapted for use in connection with manipulators
- B25J19/0066—Means or methods for maintaining or repairing manipulators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16N—LUBRICATING
- F16N11/00—Arrangements for supplying grease from a stationary reservoir or the equivalent in or on the machine or member to be lubricated; Grease cups
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16N—LUBRICATING
- F16N21/00—Conduits; Junctions; Fittings for lubrication apertures
- F16N21/04—Nozzles for connection of lubricating equipment to nipples
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16N—LUBRICATING
- F16N37/00—Equipment for transferring lubricant from one container to another
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16N—LUBRICATING
- F16N7/00—Arrangements for supplying oil or unspecified lubricant from a stationary reservoir or the equivalent in or on the machine or member to be lubricated
- F16N7/14—Arrangements for supplying oil or unspecified lubricant from a stationary reservoir or the equivalent in or on the machine or member to be lubricated the lubricant being conveyed from the reservoir by mechanical means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16N—LUBRICATING
- F16N2210/00—Applications
- F16N2210/12—Gearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16N—LUBRICATING
- F16N23/00—Special adaptations of check valves
Definitions
- the present invention relates to a grease exchange method for exchanging grease of a speed reducer built in a robot, and a grease suction device used for carrying out this method.
- the grease replacement method shown in Patent Document 1 is performed by injecting grease with a grease gun into the lubricating oil inlet of the lubricated part in a state where the discharging tube is connected to the outlet of the lubricated part. By injecting the grease into the lubricating oil inlet, the grease is injected into the lubricated portion, and the old grease in the lubricated portion is pushed out from the discharge port and discharged.
- the grease replacement method described in Patent Document 1 has a problem that old grease cannot be discharged sufficiently.
- this grease replacement method in order to replace all the old grease with the new grease, it is necessary to push out the old grease evenly with the new grease.
- a new grease passage is created in the old grease from the lubricating oil inlet for injecting the grease to the outlet for discharging the grease, and the old grease around the passage is formed. It is difficult to discharge completely.
- the outlet is not large enough or the old grease is hardened and difficult to flow, the pressure in the gear chamber will increase when new grease is injected, and a seal will be installed to seal the lubricated part. There is a risk of damage.
- a first object of the present invention is to provide a grease replacement method in which old grease is easily discharged.
- a second object of the present invention is to provide a grease suction device that can easily carry out this grease replacement method.
- a grease replacement method includes a sealable gear chamber in which a gear as a member to be lubricated is accommodated, and a grease inlet for injecting grease into the gear chamber. And a grease exchange method for exchanging grease in a case having a discharge port for discharging grease in the gear chamber, wherein the grease injection port is opened from the grease injection port in a state where the discharge port is opened. A suction step of sucking and discharging the grease out of the case, and an injection step of injecting new grease into the grease injection port and supplying new grease to the gear.
- the grease suction device includes a cylinder body and a cylinder body provided with walls that respectively close both ends of the cylinder body, and a piston that partitions the inside of the cylinder body into a first air chamber and a second air chamber.
- the first air chamber and the second air chamber are provided in the piston, and the distance between the piston and the wall on the one end side of the cylinder body is shorter than a predetermined distance.
- a valve configured to block communication between the first air chamber and the second air chamber when the distance is equal to or greater than the predetermined distance, and one end side of the cylinder body
- a first connecting member for connecting a negative pressure source to one of the first air chamber and the second air chamber, and a wall on the other end side of the cylinder body
- the grease in the case where grease is injected
- the inlet and a second connecting member for connecting the other of said second air chamber and the first air chamber.
- the old grease in the gear chamber is sucked and discharged from the grease inlet in the suction step. At this time, air flows from the discharge port into the gear chamber. Therefore, according to the present invention, since the old grease is discharged without excessively increasing the pressure in the gear chamber, it is possible to provide a grease replacement method in which the old grease is easily discharged. Moreover, according to the grease suction device according to the present invention, grease can be sucked into the cylinder body from the grease inlet of the gear chamber, and this grease can be stored in the cylinder body. Therefore, it is possible to provide a grease suction device that can easily carry out the above-described grease replacement method.
- FIG. 1 is a front view showing the configuration of a grease changing apparatus used for carrying out the grease changing method according to the first embodiment.
- FIG. 2 is a flowchart for explaining the grease replacement method according to the first embodiment.
- FIG. 3 is a cross-sectional view of the suction air cylinder.
- FIG. 4 is a cross-sectional view of a main part of the suction air cylinder.
- FIG. 5 is a cross-sectional view of a main part of the suction air cylinder.
- FIG. 6 is a sectional view of the air cylinder for injection.
- FIG. 7 is a side view of the connection joint.
- FIG. 8 is a front view showing the configuration of the grease changing device at the time of grease injection.
- FIG. 1 is a front view showing the configuration of a grease changing apparatus used for carrying out the grease changing method according to the first embodiment.
- FIG. 2 is a flowchart for explaining the grease replacement method according to the first embodiment.
- FIG. 3 is a cross-sectional
- FIG. 9 is a front view showing a configuration of a grease changing apparatus used for carrying out the grease changing method according to the second embodiment.
- FIG. 10 is a flowchart for explaining a grease replacement method according to the second embodiment.
- FIG. 11 is a front view showing a configuration of a grease exchange device used for implementing the grease exchange method according to the third and fourth embodiments.
- FIG. 12 is a flowchart for explaining a grease replacement method according to the third embodiment.
- FIG. 13 is a flowchart for explaining a grease replacement method according to the fourth embodiment.
- a grease exchanging apparatus 1 shown in FIG. 1 is an apparatus for carrying out the grease exchanging method according to the present invention.
- the grease replacement method of the present invention includes a pipe connection step S1, a suction step S2, a discharge destination changing step S3, an injection step S4, a pipe disconnecting step S5, and a grease discarding step S6. Etc. in this order.
- a grease exchange device 1 that implements this grease exchange method is connected to a control box 2 depicted at the top in FIG. 1 and a plurality of air tubes to be described later.
- First and second suction air cylinders 3, 4 and one injection air cylinder 5 are provided.
- the control box 2 has a first function and a second function.
- the first function is a function of introducing a predetermined negative pressure in the vacuum ejectors 14 and 16 by guiding the compressed air supplied from the air supply source 6 to the vacuum ejectors 14 and 16 described later.
- the second function is a function of generating a positive pressure of a predetermined pressure in the speed controllers 18 and 20 by guiding the compressed air supplied from the air supply source 6 to speed controllers 18 and 20 described later.
- the compressed air from the air supply source 6 is supplied to the compressed air coupler plug 7 located at the top of the control box 2 by the high pressure air tube 8.
- the control box 2 includes first and second regulators 11 and 12. Compressed air is guided to the first and second regulators 11 and 12 from the compressed air coupler plug 7. These first and second regulators 11 and 12 have adjustment knobs 11a and 12a and pressure gauges 11b and 12b, respectively, and reduce the compressed air led from the compressed air coupler plug 7 to a predetermined pressure. can do.
- a first vacuum ejector 14 and a second vacuum ejector 16 are connected to the first regulator 11 via a first on-off valve 13 and a third on-off valve 15, respectively.
- a first speed controller 18 and a second speed controller 20 are connected to the second regulator 12 via a second on-off valve 17 and a fourth on-off valve 19, respectively.
- the first to fourth on-off valves 13, 15, 17, and 19 are each manually switched between open and closed states.
- the first and second vacuum ejectors 14 and 16 are devices that generate negative pressure using positive pressure air supplied from the first regulator 11 side.
- the negative pressure is generated in a process in which positive pressure air is squeezed by nozzles (not shown) in the first and second vacuum ejectors 14 and 16 and ejected to a diffuser (not shown) at a high speed.
- the first and second vacuum ejectors 14 and 16 correspond to the “negative pressure source” in the present invention.
- the first vacuum ejector 14 sucks air from the first suction coupler plug 21 through a vacuum filter (not shown). As shown in FIG. 1, the first suction coupler plug 21 can be connected to the coupler socket 23 of the first suction air cylinder 3 via the first air tube 22.
- the second vacuum ejector 16 sucks air from the second suction coupler plug 24 through a vacuum filter (not shown).
- the second suction coupler plug 24 can be connected to the coupler socket 26 of the second suction air cylinder 4 via the second air tube 25.
- the first and second speed controllers 18 and 20 are devices that adjust the flow rate of positive pressure air supplied from the second regulator 12 side by a throttle (not shown).
- the positive pressure air that has passed through the first speed controller 18 (hereinafter, this positive pressure air is simply referred to as “pressurized air”) is discharged from the first discharge coupler socket 27.
- the first discharge coupler socket 27 can be connected to a first discharge port 32 of a first gear chamber 31 described later via a third air tube 28.
- the positive pressure air that has passed through the second speed controller 20 (hereinafter, this positive pressure air is simply referred to as “pressurized air”) is discharged from the second discharge coupler socket 33.
- the second discharge coupler socket 33 can be connected to a second discharge port 37 of a second gear chamber 36 described later via a fourth air tube 35.
- the control box 2 having the first and second speed controllers 18 and 20 corresponds to the “pressurized air supply device” in the present invention.
- a drain discharge valve 38 is provided at the bottom of the control box 2.
- the first and second suction air cylinders 3 and 4 and the injection air cylinder 5 are arranged in a horizontal direction with the axis lined in the vertical direction, and are connected to each other by a connecting member 40.
- an injection air cylinder 5 is arranged between the first suction air cylinder 3 and the second suction air cylinder 4.
- the first suction air cylinder 3 and the second suction air cylinder 4 have the same configuration. Therefore, in the following description, the configuration of the first and second suction air cylinders 3 and 4 will be described only for the first suction air cylinder 3.
- the first suction air cylinder 3 includes a cylinder body 41 and a piston 42 that is movably disposed in the cylinder body 41.
- FIG. 3 shows a state where the piston 42 is located at the intermediate position.
- the cylinder body 41 includes a cylindrical body 43 into which the piston 42 is movably fitted, an upper lid 44 that closes the upper end portion of the cylindrical body 43, and a lower lid 45 that closes the lower end portion of the cylindrical body 43.
- the cylinder body 41 is partitioned by a piston 42 into a first air chamber 46 located on the upper side and a second air chamber 47 located on the lower side.
- the first air chamber 46 corresponds to the “one” air chamber in the present invention
- the second air chamber 47 corresponds to the “other” air chamber in the present invention.
- the cylindrical body 43 is formed in a cylindrical shape by a transparent plastic material.
- a scale 48 (see FIG. 1) is provided on the outer peripheral surface of the cylindrical body 43 according to this embodiment in order to measure the amount of grease accumulated inside.
- the center line C (see FIG. 3) of the cylindrical body 43 corresponds to the axis of the first and second suction air cylinders 3 and 4.
- the cylindrical body 43 corresponds to a “cylindrical portion” in the present invention.
- the upper lid 44 and the lower lid 45 are each formed in a disk shape and have convex portions 44 a and 45 a that fit into the opening of the cylindrical body 43.
- the upper lid 44 and the lower lid 45 are fixed to the cylindrical body 43 with an adhesive (not shown) with the convex portions 44a and 45a fitted to the cylindrical body 43, respectively.
- a first seal member 51 for sealing between the upper lid 44 and the cylindrical body 43 is provided on the outer peripheral portion of the convex portion 44 a of the upper lid 44.
- a convex portion 45 a of the lower lid 45 is provided with a second seal member 52 for sealing between the lower lid 45 and the cylindrical body 43.
- the upper lid 44 corresponds to the “wall on one end side of the cylinder body” in the present invention
- the lower lid 45 corresponds to the “wall on the other end side of the cylinder body” in the present invention.
- a through hole 53 is formed in the upper lid 44.
- a coupler socket 23 (coupler socket 26 in the second suction air cylinder 4) for connecting the first or second air tubes 22 and 25 is attached to the through hole 53.
- the tubular threaded portion 23 a for attaching the coupler socket 23 is communicated with the first air chamber 46.
- the coupler sockets 23 and 26 correspond to the “first connecting member” in the present invention.
- a communication hole 54 for communicating the second air chamber 47 and the outside of the cylinder body 41 is formed in the lower lid 45.
- a coupler plug 57 is connected to an opening portion outside the communication hole 54 via an elbow 55 and an opening / closing valve 56.
- the coupler plug 57 is connected to the first or second grease suction tubes 58 and 59 during the suction of the grease.
- the first grease suction tube 58 connects the coupler plug 57 of the first suction air cylinder 3 and the grease inlet 61 of the first gear chamber 31.
- the second grease suction tube 59 connects the coupler plug 57 of the second suction air cylinder 4 and the grease inlet 62 of the second gear chamber 36.
- the elbow 55, the on-off valve 56, and the coupler plug 57 correspond to the “second connecting member” in the present invention.
- a guide rod 63 is provided at the axial center of the lower lid 45.
- the guide rod penetrates the axial center portion of the piston 42 and supports the piston 42 so as to be movable.
- the guide rod 63 is positioned on the same axis as the cylindrical body 43.
- the lower end of the guide rod 63 is fixed to the lower lid 45, and the upper end passes through the upper lid 44 and is fixed to the upper lid 44 by a lock nut 64.
- a portion of the upper lid 44 through which the guide rod 63 passes is provided with a third seal member 65 for sealing between the guide rod 63 and the upper lid 44.
- the piston 42 is formed in a disc shape.
- a fourth seal member 66 is provided on the outer peripheral portion of the piston 42 in order to seal between the cylindrical body 43.
- a through hole 42 a is formed in the axial center portion of the piston 42.
- the guide rod 63 is passed through the through hole 42a in a fitted state.
- a fifth seal member 67 is provided on the hole wall surface of the through hole 42 a in order to seal the gap with the guide rod 63.
- the piston 42 includes a check valve 71 and a handle rod 72 (see FIG. 1).
- the check valve 71 is for opening and closing a communication passage 73 (see FIG. 3) formed in the piston 42.
- the communication path 73 penetrates the piston 42 in the axial direction of the first suction air cylinder 3 and communicates the first air chamber 46 and the second air chamber 47.
- the check valve 71 has a shaft portion 74 penetrating the piston 42, a disc-like valve body 75 fixed to the end portion of the shaft portion 74 on the second air chamber 47 side, and the shaft portion 74 facing upward. It is constituted by a compression coil spring 76 or the like that biases the The valve body 75 is pressed against the piston 42 by the spring force of the compression coil spring 76, and closes the second air chamber 47 side in the communication passage 73 in a state where no external force is applied to the shaft portion 74. When the valve body 75 closes the communication path 73, the check valve 71 blocks communication between the first air chamber 46 and the second air chamber 47.
- the check valve 71 is opened when the piston 42 is lifted from the position shown in FIG. 4 (by the above interval being shorter than the distance D).
- the check valve 71 corresponds to a “valve” in the present invention.
- the handle rod 72 includes two rod main bodies 72a extending in parallel with the axis of the first suction air cylinder 3, and a handle 72b connecting the upper ends of the rod main bodies 72a. It is configured.
- the lower end of the rod main body 72 a is fixed to the piston 42.
- the other end side of the rod main body 72 a passes through the upper lid 44 and protrudes outside the cylinder main body 41.
- the injection air cylinder 5 is a device for injecting new grease into the first and second gear chambers 31 and 36.
- the injection air cylinder 5 according to this embodiment is formed in the same manner as the first and second suction air cylinders 3 and 4 except for the piston configuration. ing.
- the same or equivalent members used in the first and second suction air cylinders 3 and 4 are given the same reference numerals, and detailed description thereof is omitted as appropriate.
- the piston 81 of the injection air cylinder 5 does not include members corresponding to the check valve 71 and the handle rod 72 of the first and second suction air cylinders 3 and 4.
- a coupler plug 82 and a handle 83 are attached to the upper cover 44 of the injection air cylinder 5.
- the coupler plug 82 is connected to the first air chamber 46.
- the grease changing apparatus 1 is used by being connected to first and second gear chambers 31 and 36 as shown in FIG.
- the grease exchange device 1 can suck the grease simultaneously in the first and second gear chambers 31 and 36.
- the first and second gear chambers 31 and 36 are formed by a case 84 that houses a gear-type speed reducer such as an industrial robot or a machine tool.
- the case 84 includes first and second grease injection ports 61 and 62 for injecting grease into the first and second gear chambers 31 and 36, and the first and second gear chambers 31 and 36. First and second discharge ports 32 and 37 for discharging the grease are formed.
- the first and second grease injection ports 61 and 62 are formed in the lower part of the case 84.
- the first and second grease inlets 61 and 62 are normally detachably attached to a grease nipple (not shown), and are closed by the grease nipple.
- the first and second discharge ports 32 and 37 are formed in the upper portion of the case 84.
- the old grease in the air in the first and second gear chambers 31 and 36 is discharged from the first and second discharge ports 32 and 37 when the grease is injected.
- a plug member (not shown) is detachably attached to the first and second outlets 32 and 37, and is closed by the plug member.
- the first and second gear chambers 31 and 36 become sealed spaces when the first and second discharge ports 32 and 37 and the grease injection ports 61 and 62 are closed.
- a gear 85 as a member to be lubricated is accommodated. A predetermined amount of grease is injected into the first and second gear chambers 31 and 36.
- the grease replacement method according to the present invention is first performed from the pipe connection step S1.
- the coupler socket 23 of the first suction air cylinder 3 is connected to the first suction coupler plug 21 of the control box 2 by the first air tube 22.
- the coupler plug 57 of the first suction air cylinder 3 is connected to the grease inlet 61 of the first gear chamber 31 by the first grease suction tube 58.
- the coupler socket 26 of the second suction air cylinder 4 is connected to the second suction coupler plug 24 of the control box 2 by the second air tube 25.
- the coupler plug 57 of the second suction air cylinder 4 is connected to the grease inlet 62 of the second gear chamber 36 by the second grease suction tube 59.
- a dedicated joint (not shown) is used instead of the grease nipple attached to the grease inlets 61 and 62. Connect. The reason for using a dedicated joint in this way is that the direction of grease flow is opposite to the grease nipple that regulates the outflow of grease.
- one end of the third air tube 28 is connected to the first discharge coupler socket 27 of the control box 2, and the other end of the third air tube 28 is connected to the first via a connection joint 86 described later.
- the first gear chamber 31 is connected to the first outlet 32.
- one end of the fourth air tube 35 is connected to the second discharge coupler socket 33 of the control box 2, and the other end of the fourth air tube 35 is connected to the second outlet via the connection joint 86.
- the second exhaust port 37 of the gear chamber 36 is connected.
- connection joint 86 is a joint in which a plurality of holes 87 are formed at the tip. These holes 87 extend radially from the air hole 88 in the center as seen from the axial direction of the connection joint 86. These holes 87 are inclined so that one end connected to the air hole 88 and the other end opened to the outer surface of the connection joint 86 are separated in the longitudinal direction of the connection joint 86. The other end of the hole 87 is located on the distal end side of the connection joint 86 from the one end.
- the piping connection step S1 is completed by performing various air tube piping operations, and the grease suction device 91 including the first or second suction air cylinders 3 and 4 is connected to the control box 2. .
- a grease suction device 91 includes a first or second suction air cylinder 3, 4, a check valve 71, and a coupler provided in the first or second suction air cylinder 3, 4.
- the sockets 23 and 26, an elbow 55, an on-off valve 56, a coupler plug 57, and the like are included.
- the suction step S2 includes a grease suction step S2A and a pressurized air supply step S2B. These steps S2A, S2B are started by opening the first to fourth on-off valves 13, 15, 17, 19 of the control box 2 respectively. When the first on-off valve 13 and the third on-off valve 15 are opened, the grease suction step S2A is started. That is, negative pressure is generated in the first and second vacuum ejectors 14 and 16, and air is sucked from the first air chambers 46 of the first and second suction air cylinders 3 and 4.
- the pressurized air supply step S2B is started, and the pressurized air is supplied to the first and second gear chambers 31, 36. It is supplied to the discharge ports 32 and 37.
- the pressurized air passes through the plurality of holes 87 of the connection joint 86 and is directed in a plurality of directions from the first and second discharge ports 32 and 37 in the first and second gear chambers 31 and 36, respectively. And blow out radially.
- the piston 42 stops when its upper end 42 b comes into contact with the upper lid 44.
- the check valve 71 is opened, and the air in the second air chamber 47 is sucked into the first air chamber 46 through the communication path 73.
- the old grease in the first and second gear chambers 31 and 36 is sucked into the second air chamber 47 through the first and second grease suction tubes 58 and 59 together with the air.
- the old grease is pushed by the pressurized air so that the first and second grease suction tubes 58, 59 flows in.
- this suction step S2 is performed, by slightly operating the speed reducers in the first and second gear chambers 31 and 36, the air flow path is changed and a large amount of old grease can be sucked out. .
- the suction step S2 is continuously performed until there is no old grease to be sucked out. Since the inside of the second air chamber 47 can be visually recognized from the outside of the cylinder, it can be easily confirmed that old grease is not sucked out. After the old grease is not sucked out, the first to fourth on-off valves 13, 15, 17, 19 of the control box 2 are closed and the suction step S2 is finished. Thus, after completion
- FIG. 8 illustrates the coupler plug 82 connected to the first discharge coupler socket 27 by the third air tube 28. Since the first and second air tubes 22 and 25 are used only in the suction step S2, they can be removed in the discharge destination changing step S3.
- the coupler plug 57 on the lower lid 45 side of the injection air cylinder 5 is inserted into the first gear chamber 31 or the second gear chamber 36 by the grease injection tube 92. It connects with the grease injection inlets 61 and 62 of one gear chamber.
- the first and second discharge ports 32 and 37 of the first and second gear chambers 31 and 36 are opened to the atmosphere by removing the connection joint 86.
- pouring step S4 is implemented after changing the connection state of an air tube.
- the injection step S4 includes an on-off valve connected to the injection air cylinder 5 among the second on-off valve 17 and the fourth on-off valve 19 of the control box 2 (the second on-off valve 17 in FIG. 8). This is implemented by opening the. By opening this on-off valve, pressurized air is supplied to the first air chamber 46 of the injection air cylinder 5, and the piston 42 is pushed down by the pressure of this air, so that new grease flows out from the second air chamber 47. To do. The grease is injected into the first or second gear chamber 31 or 36 through the grease injection tube 92.
- the amount of new grease injected be equal to that of the old grease sucked into the first or second suction air cylinders 3 and 4. This injection amount can be easily measured using the scale 48 provided in the cylindrical body 43 of the air cylinder 5 for injection.
- the on-off valve (second on-off valve 17 in FIG. 8) of the control box 2 is closed. Thereafter, the connection destination of the grease injection tube 92 is changed to the grease injection port of the other gear chamber of the first gear chamber 31 and the second gear chamber 36. Then, the open / close valve of the control box is opened again, and new grease is injected into the other gear chamber. After a predetermined amount of new grease is injected into the other gear chamber, the pipe disconnecting step S5 is performed.
- the first and second suction air cylinders 3 and 4 and the injection air cylinder 5 are transported to the grease disposal place by the operator in the next grease disposal step S6.
- This transportation can be performed by gripping the handle 72b of the first and second suction air cylinders 3 and 4 and the handle 83 of the injection air cylinder 5 by hand.
- a grease discharge pipe (not shown) is connected to the coupler plug 57 on the lower lid 45 side of the first and second suction air cylinders 3 and 4, and the coupler socket 23 on the upper lid 44 side. , 26, or the operator pushes down the handle rod 72.
- the piston 42 is pushed down, and the old grease is discharged from the second air chamber 47 to the grease discharge pipe.
- the suction step S2 is performed in a state where pressurized air is supplied into the first and second gear chambers 31 and 36 from the first and second discharge ports 32 and 37. For this reason, since it becomes possible to push out the old grease in the 1st and 2nd gear chambers 31 and 36 with pressurized air, the grease exchange method in which old grease is discharged more easily can be provided.
- pressurized air is blown out from the first and second discharge ports 32 and 37 in a plurality of directions in the first and second gear chambers 31 and 36. For this reason, since pressurized air is supplied over a wide range in the gear chamber, the amount of old grease to which the pressure of the pressurized air is transmitted increases. Therefore, it is possible to provide a grease replacement method that further increases the amount of old grease discharged.
- the negative pressure is introduced from the first or second vacuum ejectors 14 and 16 serving as the negative pressure source into the first air chamber 46, whereby the piston 42 rises. Air and grease are sucked from the first and second gear chambers 31 and 36 side.
- the check valve 71 opens, and the old grease in the first and second gear chambers 31 and 36 is sucked into the second air chamber 47 together with air.
- the old grease sucked into the second air chamber 47 adheres to the wall of the second air chamber 47 including the piston 42 and is stored in the second air chamber 47.
- This old grease is discharged from the second air chamber 47 as the piston 42 moves in the opposite direction.
- the grease suction device 91 since it has a function of temporarily storing old grease and a function of discharging old grease, the operator does not touch the old grease.
- the grease in the first and second gear chambers 31 and 36 can be exchanged.
- the piston 42 has a handle rod 72 parallel to the axis of the first and second suction air cylinders 3 and 4.
- the handle rod 72 passes through the upper lid 44 positioned at one end of the cylinder body 41 and protrudes out of the cylinder body 41, and has a handle 72b at the protruding end. Therefore, in this embodiment, the operator can hold the handle 72b of the handle rod 72 and carry the first and second suction air cylinders 3 and 4 and the injection air cylinder 5. Further, the old grease in the first and second suction air cylinders 3 and 4 is discharged from the second air chamber 47 by pushing the handle rod 72 into the cylinder body 41. Therefore, according to this embodiment, it is possible to provide a grease suction device that facilitates work when discarding old grease.
- the cylindrical body 43 into which the pistons 42 of the first and second suction air cylinders 3 and 4 according to this embodiment are fitted is formed of a transparent material. For this reason, since the old grease sucked from the first and second gear chambers 31 and 36 can be visually observed, the operator can easily determine the end time of the suction work. Therefore, it is possible to prevent the suction work from becoming unnecessarily long, and it is possible to efficiently replace the grease.
- the grease replacement method according to the present invention can be performed while performing a process of increasing the temperature of the grease so that the old grease in the gear chamber is reduced in viscosity and is easily sucked.
- a mode for performing this processing will be described with reference to FIGS. 9 and 10.
- FIG. 9 and 10 members identical or equivalent to those described with reference to FIGS. 1 to 8 are given the same reference numerals, and detailed description thereof will be omitted as appropriate.
- the grease changing apparatus 101 shown in FIG. 9 is different from the grease changing apparatus 1 shown in FIG. 1 in the configuration for supplying pressurized air, and the other configurations are the same.
- a heater 102 for heating the pressurized air in the middle of the third and fourth air tubes 28, 35 that supply the pressurized air to the first and second gear chambers 31, 36. are provided.
- the temperature of the heater 102 rises when power is supplied to heat the pressurized air passing through the third and fourth air tubes 28 and 35 to a predetermined temperature.
- the pressurized air whose temperature has risen is supplied to the first and second gear chambers 31 and 36 and sprayed on the old grease, whereby the temperature of the grease rises.
- the temperature of grease rises also when the temperature of the 1st and 2nd gear chambers 31 and 36 rises due to inflow of pressurized air.
- the fluidity of the grease increases when the temperature is about 20 ° C. For this reason, as the heater 102, what can heat pressurized air so that grease may be heated up to about 20 degreeC is used.
- the grease replacement method when the heater 102 is used in this way will be described with reference to FIG. Unlike the grease replacement method shown in FIG. 2, the grease replacement method according to this embodiment has a suction step S ⁇ b> 21 for supplying pressurized air while using the heater 102.
- the implementation contents of the steps other than the suction step S21 are the same as those of the grease exchange method shown in FIG.
- the suction step S21 according to this embodiment has a heating step S2C.
- This heating step S2C is included in the pressurized air supply step S2B, and is always performed in the process of supplying pressurized air. In the heating step S2C, power is supplied to the heater 102, and the pressurized air is heated to a predetermined temperature as described above.
- the heated pressurized air is supplied to the first and second gear chambers 31, 36, whereby the temperature of the old grease in the first and second gear chambers 31, 36 is reached. Increases and the viscosity decreases, so that the grease is easily sucked. Therefore, according to this embodiment, old grease can be more easily discharged, so that it is possible to provide a grease replacement method with high efficiency of grease replacement.
- the grease replacement method according to the present invention can perform a process of melting old grease in the gear chamber so as to be easily sucked.
- An embodiment for performing this processing will be described with reference to FIGS. 11 and 12, members identical or equivalent to those described with reference to FIGS. 1 to 8 are given the same reference numerals, and detailed description thereof will be omitted as appropriate.
- the grease exchange device 111 shown in FIG. 11 is different from the grease exchange device 1 shown in FIG. 1 in the configuration for supplying pressurized air, and the other configurations are the same.
- a solvent supply device 112 is connected midway between the third and fourth air tubes 28 and 35 that supply pressurized air to the first and second gear chambers 31 and 36.
- the solvent supply device 112 includes an on-off valve 115 having a downstream end connected by communication pipes 113 and 114 in the middle of the third and fourth air tubes 28 and 35, and a solvent tank connected to the upstream end of the on-off valve 115. 116.
- the solvent tank 116 stores a solvent 117 in which grease is dissolved.
- the solvent 117 flows into the third and fourth air tubes 28 and 35 through the communication pipes 113 and 114 when the on-off valve 115 is opened. In this embodiment, the solvent 117 flows by gravity into the third and fourth air tubes 28, 35, and further passes through these tubes 28, 35 into the first and second gear chambers 31, 36. Inflow.
- the grease replacement method when the solvent 117 is used in this way will be described with reference to FIG. Unlike the grease replacement method shown in FIG. 2, the grease replacement method according to this embodiment includes a suction step S ⁇ b> 22 for sucking grease in a state of being dissolved in the solvent 117.
- the implementation contents of the steps other than the suction step S22 are the same as those of the grease exchange method shown in FIG.
- the pipe connection step S1 according to this embodiment is performed using the third and fourth air tubes 28 and 35 to which the solvent supply device 112 is connected.
- the suction step S22 includes a dissolution step P1, a grease suction step S2A, and a pressurized air supply step S2B.
- the dissolution step P1 includes a solvent injection step P2, a speed reducer operation step P3, and a holding step P4.
- a solvent injection step P2 is first performed, and then a reduction gear operation step P3 and a holding step P4 are performed in this order.
- the solvent injection step P2 is started by opening the on-off valve 115.
- the on-off valve 115 is opened in a state where no pressurized air is supplied to the third and fourth air tubes 28 and 35.
- the solvent 117 is injected from the solvent tank 116 through the communication pipes 113 and 114 into the third and fourth air tubes 28 and 35.
- the solvent 117 flows into the first and second gear chambers 31 and 36 from the third and fourth air tubes 28 and 35.
- the flow rate of the solvent 117 at this time is such a flow rate that the inside of the first and second gear chambers 31 and 36 is filled with the solvent 117.
- the reduction gears in the first and second gear chambers 31 and 36 operate for a predetermined time.
- the old grease is dissolved by the solvent 117 in substantially the entire area of the lubricated portion of the speed reducer.
- the holding step P4 the state in which the solvent 117 is injected into the first and second gear chambers 31 and 36 is held for a predetermined time.
- the holding step P4 is performed, the old grease in the first and second gear chambers 31 and 36 is dissolved by the solvent 117, and the state of this grease becomes liquid or rich in fluidity.
- the grease in such a state is easily sucked in the next grease suction step S2A. Therefore, according to this embodiment, old grease can be more easily discharged, so that it is possible to provide a grease replacement method with high efficiency of grease replacement.
- the grease exchange method according to this embodiment can be implemented using the grease exchange device 111 shown in FIG.
- a solvent pump (not shown) to the solvent supply device 112 of the grease replacement device 111.
- the solvent 117 is introduced from the communication pipes 113 and 114 into the third and fourth air tubes 28 and 35 against the pressure of the pressurized air in the third and fourth air tubes 28 and 35. Send it in. .
- the grease replacement method according to this embodiment has a suction step S23 for supplying pressurized air and a solvent to the first and second gear chambers 31 and 36 simultaneously. ing.
- the suction step S23 according to this embodiment has a dissolution step S2D.
- This dissolution step S2D is included in the pressurized air supply step S2B, and is always performed in the process of supplying pressurized air.
- the solvent 117 in which the grease dissolves is fed into the third and fourth air tubes 28 and 35 by gravity or a solvent pump and mixed with the pressurized air.
- the pressurized air mixed with the solvent flows into the first and second gear chambers 31 and 36 through the third and fourth air tubes 28 and 35, and the old ones in these gear chambers 31 and 36.
- Contact grease Since the old grease becomes easy to flow when the solvent 117 adheres and dissolves, the old grease is easily pushed by the pressurized air, sucked from the grease injection ports 61 and 62, and the first and second gear chambers 31 and 36 is discharged outside.
- the grease suction device 91 shown in each of the above-described embodiments has the first and second suction air cylinders 3 and 4 for sucking old grease from the first and second gear chambers 31 and 36 simultaneously. Equipped.
- the present invention is not limited to such a limitation, and the number of suction air cylinders can be changed as appropriate.
- pour new grease was shown.
- new grease can be injected using a grease gun.
- the example which generates a negative pressure by the vacuum ejectors 14 and 16 was shown.
- the negative pressure source is not limited to this, and for example, an electric vacuum pump can be used.
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Abstract
Description
また、本発明に係るグリス吸引装置によれば、歯車室のグリス注入口からシリンダ本体内にグリスを吸引し、このグリスをシリンダ本体内に貯留することができる。したがって、上述したグリス交換方法を容易に実施することが可能なグリス吸引装置を提供することができる。
以下、本発明に係るグリス交換方法およびグリス吸引装置の一実施の形態を図1~図8を参照して詳細に説明する。
図1に示すグリス交換装置1は、本発明に係るグリス交換方法を実施するための装置である。本発明のグリス交換方法は、図2のフローチャートに示すように、配管接続ステップS1と、吸引ステップS2と、吐出先変更ステップS3と、注入ステップS4と、配管切り離しステップS5と、グリス廃棄ステップS6などをこの順序で実施する方法である。
このグリス交換方法を実施するグリス交換装置1は、図1に示すように、図1において最も上に描かれている制御ボックス2と、この制御ボックス2に後述する複数のエアチューブによって接続された第1および第2の吸引用エアシリンダ3,4および1個の注入用エアシリンダ5などを備えている。
制御ボックス2は、第1の機能と第2の機能とを有している。第1の機能は、空気供給源6から供給された圧縮空気を後述する真空エジェクタ14,16に導いて真空エジェクタ14,16内に所定の圧力の負圧を発生させる機能である。第2の機能は、空気供給源6から供給された圧縮空気を後述するスピードコントローラ18,20に導いてスピードコントローラ18,20内に所定の圧力の正圧を発生させる機能である。空気供給源6の圧縮空気は、制御ボックス2の最上部に位置する圧縮空気用カプラプラグ7に高圧用エアチューブ8によって供給される。
制御ボックス2は、第1および第2のレギュレータ11,12を備えている。これらの第1および第2のレギュレータ11,12には、圧縮空気用カプラプラグ7から圧縮空気が導かれる。これらの第1および第2のレギュレータ11,12は、それぞれ調整用摘み11a,12aと圧力計11b,12bとを有し、圧縮空気用カプラプラグ7から導かれた圧縮空気を所定の圧力に減圧することができる。
第1のレギュレータ11には、第1の開閉弁13および第3の開閉弁15を介してそれぞれ第1の真空エジェクタ14および第2の真空エジェクタ16が接続されている。
第1および第2のスピードコントローラ18,20は、第2のレギュレータ12側から供給された正圧の空気の流量を絞り(図示せず)によって調整する装置である。第1のスピードコントローラ18を通過した正圧の空気(以下においては、この正圧の空気を単に「加圧空気」という)は、第1の吐出用カプラソケット27から吐出される。図1に示すように、第1の吐出用カプラソケット27は、第3のエアチューブ28を介して後述する第1の歯車室31の第1の排出口32に接続することができる。
制御ボックス2の最も下には、ドレン排出用バルブ38が設けられている。
第1および第2の吸引用エアシリンダ3,4と注入用エアシリンダ5は、軸線が上下方向を指向する状態で水平方向に並べられており、連結部材40によって互いに連結されている。この実施の形態においては、第1の吸引用エアシリンダ3と第2の吸引用エアシリンダ4の間に注入用エアシリンダ5が配置されている。
第1の吸引用エアシリンダ3と第2の吸引用エアシリンダ4は同一の構成を有する。このため、以下において、第1および第2の吸引用エアシリンダ3,4の構成の説明は、第1の吸引用エアシリンダ3についてのみ行う。
第1の吸引用エアシリンダ3は、図3に示すように、シリンダ本体41と、このシリンダ本体41の中に移動自在に配置されたピストン42とによって構成されている。図3はピストン42が中間位置に位置している状態を示す。シリンダ本体41は、ピストン42が移動自在に嵌合する円筒体43と、この円筒体43の上端部を閉塞する上蓋44と、円筒体43の下端部を閉塞する下蓋45とによって構成されている。シリンダ本体41内は、ピストン42によって、上側に位置する第1の気室46と、下側に位置する第2の気室47とに仕切られている。この実施の形態においては、第1の気室46が本発明でいう「一方」の気室に相当し、第2の気室47が本発明でいう「他方」の気室に相当する。
下蓋45には、第2の気室47とシリンダ本体41の外とを連通するための連通穴54が形成されている。この連通穴54の外側の開口部分にはエルボ55と開閉弁56とを介してカプラプラグ57が接続されている。
ピストン42は、円板状に形成されている。ピストン42の外周部には、円筒体43との間をシールするために第4のシール部材66が設けられている。ピストン42の軸心部には貫通孔42aが形成されている。ガイドロッド63は、この貫通孔42aに嵌合状態で通されている。貫通孔42aの孔壁面には、ガイドロッド63との間をシールするために第5のシール部材67が設けられている。
チェック弁71は、ピストン42を貫通する軸部74と、この軸部74における第2の気室47側の端部に固定された円板状の弁体75と、軸部74を上方に向けて付勢する圧縮コイルばね76などによって構成されている。弁体75は、この圧縮コイルばね76のばね力によってピストン42に押し付けられており、軸部74に外力が加えられていない状態において、連通路73における第2の気室47側を閉塞する。弁体75が連通路73を閉塞することにより、チェック弁71が第1の気室46と第2の気室47との連通を遮断する。
注入用エアシリンダ5は、新しいグリスを第1および第2の歯車室31,36内に注入するための装置である。この実施の形態による注入用エアシリンダ5は、図6に示すように、第1および第2の吸引用エアシリンダ3,4とは主にピストンの構成が異なるだけで、その他は同等に形成されている。このため、注入用エアシリンダ5において、第1および第2の吸引用エアシリンダ3,4に用いられているものと同一もしくは同等の部材については、同一符号を付し詳細な説明を適宜省略する。
注入用エアシリンダ5のピストン81は、第1および第2の吸引用エアシリンダ3,4のチェック弁71とハンドル用ロッド72に相当する部材を備えていない。また、注入用エアシリンダ5の上蓋44には、カプラプラグ82と取っ手83が取り付けられている。カプラプラグ82は第1の気室46に接続されている。
第1および第2の歯車室31,36は、詳細には図示してはいないが、産業用ロボットや工作機械などの歯車式減速機を収容するケース84によって形成されている。
第1および第2の排出口32,37は、通常は栓部材(図示せず)が着脱可能に取付けられており、この栓部材によって閉塞されている。
第1および第2の歯車室31,36は、第1および第2の排出口32,37とグリス注入口61,62とが閉じられることにより密閉空間になる。第1および第2の歯車室31,36には、被潤滑部材としての歯車85が収容されている。この第1および第2の歯車室31,36内には、所定量のグリスが注入される。
次に、本発明に係るグリス交換方法を図2に示すフローチャートを用いて詳細に説明する。本発明に係るグリス交換方法は、先ず、配管接続ステップS1から実施される。配管接続ステップS1においては、図1に示すように、第1の吸引用エアシリンダ3のカプラソケット23を第1のエアチューブ22によって制御ボックス2の第1の吸引用カプラプラグ21に接続する。そして、第1の吸引用エアシリンダ3のカプラプラグ57を第1のグリス吸引用チューブ58によって第1の歯車室31のグリス注入口61に接続する。
このように各種のエアチューブの配管作業が行われることにより配管接続ステップS1が終了し、第1または第2の吸引用エアシリンダ3,4を含むグリス吸引装置91が制御ボックス2に接続される。この実施の形態によるグリス吸引装置91は、第1または第2の吸引用エアシリンダ3,4と、チェック弁71と、第1または第2の吸引用エアシリンダ3,4に設けられているカプラソケット23,26と、エルボ55、開閉弁56およびカプラプラグ57などによって構成されている。
このように配管接続ステップS1が終了した後、吸引ステップS2が実施される。
この実施の形態による吸引ステップS2は、図2に示すように、グリス吸引ステップS2Aと、加圧空気供給ステップS2Bとによって構成されている。これらのステップS2A,S2Bは、制御ボックス2の第1~第4の開閉弁13,15,17,19をそれぞれ開状態とすることにより開始される。第1の開閉弁13および第3の開閉弁15が開くことにより、グリス吸引ステップS2Aが開始される。すなわち、第1および第2の真空エジェクタ14,16で負圧が生じ、第1および第2の吸引用エアシリンダ3,4のそれぞれの第1の気室46から空気が吸引される。第2の開閉弁17および第4の開閉弁19が開くことにより、加圧空気供給ステップS2Bが開始され、加圧空気が第1および第2の歯車室31,36の第1および第2の排出口32,37に供給される。この加圧空気は、接続継手86の複数の孔87を通過して、第1および第2の排出口32,37からそれぞれ第1および第2の歯車室31,36内で複数の方向に向けて放射状に吹き出す。
古いグリスが吸い出されなくなった後、制御ボックス2の第1~第4の開閉弁13,15,17,19を閉状態として吸引ステップS2を終了する。このように吸引ステップS2が終了した後、吐出先変更ステップS3が実施される。なお、この吐出先変更ステップS3が実施される以前に、注入用エアシリンダ5の第2の気室47に新しいグリスを充填しておく。
この吐出先変更ステップS3においては、図8に示すように、注入用エアシリンダ5の上蓋44側のカプラプラグ82を制御ボックス2の第1または第2の吐出用カプラソケット27,33に第3または第4のエアチューブ28,35によって接続する。図8は、カプラプラグ82を第3のエアチューブ28によって第1の吐出用カプラソケット27に接続した状態で描いてある。なお、第1および第2のエアチューブ22,25は、吸引ステップS2でしか使用しないために、この吐出先変更ステップS3で取外すことができる。
このようにエアチューブの接続状態を変えた後に注入ステップS4が実施される。
注入ステップS4は、制御ボックス2の第2の開閉弁17と第4の開閉弁19とのうち、注入用エアシリンダ5に接続されている開閉弁(図8においては第2の開閉弁17)を開状態とすることにより実施される。この開閉弁が開くことにより、加圧空気が注入用エアシリンダ5の第1の気室46に供給され、この空気の圧力でピストン42が押し下げられて第2の気室47から新しいグリスが流出する。このグリスは、グリス注入用チューブ92を通って第1または第2の歯車室31,36内に注入される。
他方の歯車室に所定量の新しいグリスが注入された後、配管切り離しステップS5が実施される。
配管切り離しステップS5においては、第1および第2の吸引用エアシリンダ3,4と注入用エアシリンダ5とから全てのエアチューブが外される。また、この配管切り離しステップS5において、第1および第2の歯車室31,36のグリス注入口61,62にグリスニップル(図示せず)が取付けられるとともに、第1および第2の排出口32,37に栓部材(図示せず)が取付けられる。
第1および第2の吸引用エアシリンダ3,4と注入用エアシリンダ5は、次のグリス廃棄ステップS6で作業者によってグリス廃棄場所まで運搬される。この運搬は、第1および第2の吸引用エアシリンダ3,4の取っ手72bや注入用エアシリンダ5の取っ手83を手で把持して行うことができる。
グリス廃棄ステップS6は、第1および第2の吸引用エアシリンダ3,4の下蓋45側のカプラプラグ57にグリス排出用パイプ(図示せず)を接続するとともに、上蓋44側のカプラソケット23,26に加圧空気を供給するか、作業者がハンドル用ロッド72を押し下げて行われる。このような手順でグリス吸引装置91を操作することによって、ピストン42が押し下げられ、第2の気室47から古いグリスがグリス排出用パイプに排出される。
上述したように実施されるグリス交換方法によれば、吸引ステップS2で第1または第2の歯車室31,36内の古いグリスがグリス注入口61,62から吸引されて排出される。このとき第1および第2の排出口32,37から第1または第2の歯車室31,36内に空気が流入する。したがって、この実施の形態によれば、第1または第2の歯車室31,36内の圧力が過度に高くなることなく、古いグリスが排出されるから、古いグリスが排出され易いグリス交換方法を提供することができる。
このため、この実施の形態によるグリス吸引装置91によれば、古いグリスを一時的に貯留する機能と、古いグリスを排出する機能とを有しているから、作業者が古いグリスに触ることなく第1および第2の歯車室31,36内のグリスを交換することが可能になる。
このため、この実施の形態においては、ハンドル用ロッド72の取っ手72bを作業者が把持して第1、第2の吸引用エアシリンダ3,4および注入用エアシリンダ5を運ぶことができる。また、ハンドル用ロッド72をシリンダ本体41内に押し込むことによって、第1および第2の吸引用エアシリンダ3,4内の古いグリスが第2の気室47から排出される。
したがって、この実施の形態によれば、古いグリスを破棄するときの作業が容易なグリス吸引装置を提供できる。
本発明に係るグリス交換方法は、歯車室内の古いグリスの粘度が低下して吸引され易くなるように、このグリスの温度が上昇する処理を施しながら実施することができる。この処理を行う形態を図9および図10によって説明する。図9および図10において、図1~図8によって説明したものと同一もしくは同等の部材については、同一符号を付し詳細な説明を適宜省略する。
したがって、この実施の形態によれば、古いグリスがより一層排出され易くなるから、グリス交換の効率が高いグリス交換方法を提供することができる。
本発明に係るグリス交換方法は、歯車室内の古いグリスを吸引され易くなるように溶かす処理を施すことができる。この処理を行う形態を図11および図12によって説明する。図11および図12において、図1~図8によって説明したものと同一もしくは同等の部材については、同一符号を付し詳細な説明を適宜省略する。
この実施の形態による配管接続ステップS1は、溶剤供給装置112が接続された第3および第4のエアチューブ28,35を使用して実施される。
保持ステップP4においては、第1および第2の歯車室31,36内に溶剤117が注入されている状態を予め定めた時間だけ保持する。この保持ステップP4が実施されているときに第1および第2の歯車室31,36内の古いグリスが溶剤117で溶け、このグリスの状態が液状あるいは流動性に富む状態になる。このような状態のグリスは、次のグリス吸引ステップS2Aで吸引され易い。
したがって、この実施の形態によれば、古いグリスがより一層排出され易くなるから、グリス交換の効率が高いグリス交換方法を提供することができる。
歯車室内のグリスを溶剤で溶かす処理を行うグリス交換方法は、図13に示すように実施することができる。図13において、図1~図8および図11によって説明したものと同一もしくは同等の部材については、同一符号を付し詳細な説明を適宜省略する。
この実施の形態による吸引ステップS23は、溶解ステップS2Dを有している。この溶解ステップS2Dは、加圧空気供給ステップS2Bに含まれており、加圧空気が供給される行程で常に実施される。溶解ステップS2Dにおいては、グリスが溶ける溶剤117が第3および第4のエアチューブ28,35内に重力あるいは溶剤ポンプによって送られ、加圧空気に混ぜられる。
したがって、この実施の形態によれば、古いグリスがより一層排出され易くなるから、グリス交換の効率が高いグリス交換方法を提供することができる。
また、上述した各実施の形態においては、新しいグリスを注入するために注入用エアシリンダ5を使用する例を示した。しかし、新しいグリスを注入するためには、グリスガンを使用して行うことができる。
さらに、上述した各実施の形態では、負圧を真空エジェクタ14,16によって発生させる例を示した。しかし、負圧源は、これに限定されることはなく、例えば電動式の真空ポンプを使用することもできる。
Claims (11)
- 被潤滑部材としての歯車が収容される密閉可能な歯車室と、
前記歯車室内にグリスを注入するためのグリス注入口と、
前記歯車室内のグリスを排出するための排出口とを有するケースの中のグリスを交換するグリス交換方法であって、
前記排出口が開放された状態で前記グリス注入口から前記歯車室内のグリスを吸引して前記ケースの外に排出する吸引ステップと、
前記グリス注入口に新しいグリスを注入して前記歯車に新しいグリスを供給する注入ステップとによって実施するグリス交換方法。 - 請求項1記載のグリス交換方法において、
前記吸引ステップは、前記歯車室内に前記排出口から加圧空気が供給される状態で実施されることを特徴とするグリス交換方法。 - 請求項2記載のグリス交換方法において、
前記吸引ステップは、前記加圧空気を所定の温度に加熱する加熱ステップを有することを特徴とするグリス交換方法。 - 請求項2記載のグリス交換方法において、
前記吸引ステップは、前記歯車室内のグリスを溶剤で溶かす溶解ステップを有することを特徴とするグリス交換方法。 - 請求項2ないし請求項4のうちいずれか一つに記載のグリス交換方法において、
前記加圧空気は、前記排出口から前記歯車室内の複数の方向に向けて吹き込まれることを特徴とするグリス交換方法。 - 筒体およびこの筒体の両端をそれぞれ閉塞する壁を備えたシリンダ本体と、このシリンダ本体内を第1の気室と第2の気室とに仕切るピストンとを有するエアシリンダと、
前記ピストンに設けられ、前記ピストンと前記シリンダ本体の一端側の壁との間隔が予め定めた距離より短くなることにより前記第1の気室と前記第2の気室とを連通し、前記間隔が前記予め定めた距離以上となることにより前記第1の気室と前記第2の気室との連通を遮断するように構成された弁と、
前記シリンダ本体の一端側の壁に設けられ、前記第1の気室と前記第2の気室とのうちいずれか一方に負圧源を接続するための第1の接続部材と、
前記シリンダ本体の他端側の壁に設けられ、グリスが注入されているケースのグリス注入口を前記第1の気室と前記第2の気室とのうち他方に接続するための第2の接続部材とを備えているグリス吸引装置。 - 請求項6記載のグリス吸引装置において、
前記ケースは、グリスを排出するための排出口を有し、
前記排出口には、加圧空気を供給する加圧空気供給装置が接続されていることを特徴とするグリス吸引装置。 - 請求項7記載のグリス吸引装置において、
前記加圧空気供給装置は、前記加圧空気を所定の温度に加熱するヒーターを備えていることを特徴とするグリス吸引装置。 - 請求項6記載のグリス吸引装置において、
前記ケースは、グリスを排出するための排出口を有し、
前記排出口には、グリスを溶かす溶剤を供給する溶剤供給装置が接続されていることを特徴とするグリス吸引装置。 - 請求項6ないし請求項9のうちいずれか一つに記載のグリス吸引装置において、
前記ピストンは、前記エアシリンダの軸線と平行なハンドル用ロッドを有し、
前記ハンドル用ロッドは、前記シリンダ本体の一端側の壁を貫通して前記シリンダ本体の外に突出し、突出側端部に取っ手を有していることを特徴とするグリス吸引装置。 - 請求項6ないし請求項10のうちいずれか一つに記載のグリス吸引装置において、
前記シリンダ本体における前記ピストンが嵌合する円筒部は、透明な材料によって形成されていることを特徴とするグリス吸引装置。
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