WO2020189193A1 - Speed reducing gear, method for preventing corrosion of speed reducing gear, lubricant, method for producing lubricant, and additive - Google Patents
Speed reducing gear, method for preventing corrosion of speed reducing gear, lubricant, method for producing lubricant, and additive Download PDFInfo
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- WO2020189193A1 WO2020189193A1 PCT/JP2020/007548 JP2020007548W WO2020189193A1 WO 2020189193 A1 WO2020189193 A1 WO 2020189193A1 JP 2020007548 W JP2020007548 W JP 2020007548W WO 2020189193 A1 WO2020189193 A1 WO 2020189193A1
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- lubricant
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- metal ions
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
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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
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
Definitions
- the present invention relates to a speed reducer, a method for preventing corrosion of the speed reducer, a lubricant, a method for producing a lubricant, and an additive.
- Lubricating oil is contained in machines such as speed reducers to reduce friction generated in sliding parts.
- Lubricating oil is known to be deteriorated by pollutants such as iron powder, and methods for suppressing deterioration of lubricating oil are being studied.
- pollutants such as iron powder
- Patent Document 1 in an orthogonal speed reducer, in order to suppress deterioration due to a temperature rise of the lubricating oil, a means for increasing the space for accommodating the lubricating oil or cooling by cooling with cooling air is used for lubrication. Means for suppressing an increase in oil temperature and the like are disclosed.
- an object of the present invention is to provide a speed reducing device capable of suppressing deterioration of the lubricating oil.
- the present inventor acts as a catalyst for metal ions dissolved in the lubricating oil from the metal parts of the device (for example, a speed reducer) in which the lubricating oil is sealed, and the lubricating oil is oxidized. I found that it was deteriorating. Furthermore, it has been found that a corrosive substance is generated due to oxidative deterioration of the lubricating oil, and the corrosive substance corrodes the metal member, resulting in problems such as leakage of the lubricating oil.
- the present invention is the following reduction gear, a method for suppressing corrosion of the reduction gear, a lubricant, a method for producing a lubricant, and an additive.
- the speed reducing device of the present invention for solving the above problems is a speed reducing device in which a lubricant is sealed, and the speed reducing device has a metal member made of metal at a portion in contact with the lubricant, and the lubricant is , It is characterized by containing a substance that captures metal ions generated from a metal member.
- the speed reducer of the present invention since the lubricant containing the substance that captures the metal ion is held, even if the metal ion is generated from the metal member in contact with the lubricant, the metal due to the substance that captures the metal ion is used. The action of ions is reduced, and the oxidative deterioration of the lubricating oil and the corrosion of metal members can be suppressed. Thereby, for example, leakage of the lubricant can be suppressed.
- the method for suppressing corrosion of the speed reducer of the present invention for solving the above problems is a method for suppressing corrosion of a speed reducer in which a lubricant is sealed, and the lubricant captures metal ions generated from a metal member. It is characterized by comprising a step of adding a substance and a step of bringing a lubricant containing a substance that captures metal ions into contact with a metal member made of metal of the speed reducer.
- a substance that traps metal ions is added to the lubricant, and the lubricant is brought into contact with the metal member, so that metal ions are generated from the metal member that comes into contact with the lubricant. Even in such a case, the action of the metal ion can be reduced by the substance that captures the metal ion, and the oxidative deterioration of the lubricating oil and the corrosion of the metal member can be suppressed.
- the lubricant of the present invention for solving the above problems is characterized by containing a lubricating oil and a substance that traps metal ions. According to this lubricant, in various devices having a sliding portion made of a metal member, friction of the sliding portion is suppressed, and further, deterioration of the lubricating oil and corrosion of the metal member in contact with the lubricant are prevented. It can be suppressed.
- the method for producing a lubricant of the present invention for solving the above problems is characterized by comprising a step of adding a substance that traps metal ions to the lubricating oil.
- a substance that traps metal ions is added to the lubricating oil. Therefore, even if metal ions are generated from a metal member that comes into contact with the lubricant, the metal ions are generated by the substance that captures the metal ions. It is possible to provide a lubricant capable of reducing the action of the lubricant and suppressing the deterioration of the lubricating oil and the corrosion of the metal member.
- the additive of the present invention for solving the above-mentioned problems is an additive added to a lubricant, and the additive is a substance that captures metal ions. According to this additive, by adding it to the lubricating oil, it is possible to obtain a lubricant capable of suppressing deterioration of the lubricating oil and, by extension, corrosion of metal members of various devices such as a speed reducer.
- the speed reducing device of the present invention is a speed reducing device in which a lubricant is sealed, and the speed reducing device has a metal member composed of a metal at a portion in contact with the lubricant, and the lubricant is a metal generated from the metal member. It is characterized by containing a substance that captures ions.
- the speed reducer of the present invention was invented based on the finding that the metal ions contained in the lubricating oil promote the corrosion of the metal member as a cause of the corrosion of the metal member in contact with the lubricating oil. It captures metal ions contained in the lubricating oil. More specifically, it has been found that the metal ions dissolved in the lubricating oil from the metal member of the speed reducer act as a catalyst to oxidatively deteriorate the lubricating oil. Then, it was found that a corrosive substance was generated due to oxidative deterioration of the lubricating oil, and the metal member was corroded.
- the metal ions were not removed because the particles such as iron powder contained in the lubricating oil were focused on and removed by filtration or the like.
- the speed reducer of the present invention since the lubricant containing the substance that captures the metal ion is held, even if the metal ion is generated from the metal member in contact with the lubricant, the metal due to the substance that captures the metal ion It is possible to reduce the action of ions and suppress oxidative deterioration of the lubricating oil and, by extension, corrosion of metal members. As a result, lubricant leakage due to corrosion of the metal member can be suppressed.
- the speed reducer is a mechanical device that outputs by reducing the rotation speed of power with gears or the like. As an output, a torque proportional to a reduction ratio such as a gear ratio or a pulley ratio can be obtained.
- the reduction gear is mainly used for the output shaft of the prime mover, but it may also be used in the rear stage of the transmission, such as the final reduction gear of an automobile. In addition, it is often combined with a motor for industrial use and railroad vehicle use. In addition, it is also used to drive ship screw propellers and aircraft propellers.
- the speed reducer of the present invention is not particularly limited as long as it has a metal member and the enclosed lubricant and the metal member come into contact with each other.
- parallel shaft reducers such as parallel shaft gear reducers and helical reducers, orthogonal shaft reducers such as worm reducers, bevel gear reducers and hypoid reducers, planetary gear reducers, wave gear reducers and cycloid drives.
- parallel shaft reducers such as parallel shaft gear reducers and helical reducers, orthogonal shaft reducers such as worm reducers, bevel gear reducers and hypoid reducers, planetary gear reducers, wave gear reducers and cycloid drives.
- concentric shaft type reduction gear such as, and a traction drive type reduction gear such as a roller reduction gear.
- the lubricant of the present invention is a lubricant for suppressing deterioration of the lubricating oil and thus for suppressing corrosion of metal members, and is characterized by containing the lubricating oil and a substance that traps metal ions. It is a thing. That is, in the present specification, "lubricating oil” has a lubricating component for suppressing friction and wear in sliding portions between members or suppressing heat generation, and does not contain a substance that traps metal ions. It is expressed as a "lubricant” in which a substance that captures metal ions is added as an additive to the lubricating oil.
- the device to which the lubricant of the present invention can be applied is not limited to the speed reducing device, but can be applied to various devices having a metal member in contact with the lubricant. For example, it can be applied to a device having a metal bearing, a cylinder device having a metal rod, a ball screw device, and the like.
- Lubricating oil is oil for efficiently lubricating sliding parts of mechanical devices such as gears and bearings of speed reducing devices.
- known oils and greases can be used, but the lubricating oil is not limited thereto.
- Lubricating oils are roughly classified into, for example, mineral oils, synthetic oils, vegetable oils, and animal oils.
- the mineral oil is a lubricating oil obtained by refining petroleum, and examples thereof include paraffin-based mineral oil and naphthen-based mineral oil.
- Synthetic oils are lubricating oils obtained by chemical synthesis, for example, hydrocarbon-based synthetic oils such as polyalphaolefins, alphaolefin olegomers, polybudens, alkylbenzenes, cycloalkans, monoesters, diesters, polyol esters, phosphorus.
- hydrocarbon-based synthetic oils such as polyalphaolefins, alphaolefin olegomers, polybudens, alkylbenzenes, cycloalkans, monoesters, diesters, polyol esters, phosphorus.
- ester-based synthetic oils such as acid esters and silicate esters
- ether-based synthetic oils such as polyglycol and phenyl ether
- fluorine-based synthetic oils such as halocarbon.
- the vegetable oil is a plant-derived lubricating oil, for example, palm oil, rapeseed oil, sunflower oil, soybean oil, flaxseed oil, sunflower oil, olive oil, palm oil, palm kernel oil, rice oil, corn oil, or a fractionated oil thereof.
- Hardened oils vegetable oils such as ester exchange oils, polyoxyalkyleneized oils, chlorinated oils, sulfide oils, polymerized oils, waxes, fatty acids, fatty acid derivatives, shavings, esterified oils, amidated oils, polyoxyalkylene adducts And so on.
- the animal oil is a lubricating oil derived from animals, and examples thereof include beef tallow, lard, sheep tallow, whale oil, sardine oil, herring oil, and milk fat.
- the substance that captures metal ions is not particularly limited as long as it captures metal ions and reduces their action.
- the metal ion is one that dissolves in the lubricating oil from the metal member of the speed reducer, and is, for example, iron (II) ion, iron (III) ion, lead (II) ion, aluminum ion, and copper (II). Examples thereof include ions, nickel ions, chromium (III) ions, zinc ions, tin (II) ions, tin (IV) ions, manganese (II) ions and manganese (IV) ions.
- R 1 to R 12 represent a hydrogen atom or a hydrocarbon group having 1 to 30 carbon atoms.
- the hydrocarbon group having 1 to 30 carbon atoms includes at least one atom selected from the group consisting of nitrogen atom, oxygen atom, sulfur atom and halogen atom, nitrogen atom, oxygen atom, sulfur atom, halogen atom and the like.
- a functional group or a connecting group containing a nitrogen atom, an oxygen atom, a sulfur atom and the like may be contained inside or at the end of the carbon skeleton.
- the hydrocarbon group may be any of a saturated hydrocarbon group, an unsaturated hydrocarbon group, an aromatic hydrocarbon group and the like, and has a branched structure, a cyclic structure, and a carbon-carbon unsaturated bond (carbon-carbon double bond, It may have each of carbon-carbon triple bond).
- Functional groups include hydroxyl groups (-OH), carboxyl groups (-COOH), amino groups (-NH 2 ), sulfonic acid groups (-SO 3 H), fluorine atoms (-F), chlorine atoms (-Cl), and bromine. Examples thereof include an atom (-Br), an iodine atom (-I), a mercapto group (-SH) alkoxy group and the like.
- hydrocarbon group examples include a methyl group, an ethyl group, an n-propyl group, an i-propyl group, an n-butyl group, an i-butyl group, a t-butyl group, a pentyl group, a hexyl group, a cyclohexyl group and an octyl group.
- Nonyl group, decyl group, phenyl group, benzyl group, vinyl group, allyl group (-CH 2 CH CH 2 ) and the like.
- the substance that captures metal ions is a compound described in the following chemical formulas (3) and (4).
- hexacyanoferrates such as potassium hexacyanoferrate (III) and potassium hexacyanoferrate (II)
- thiocyanates such as potassium thiocyanate and sodium thiocyanate
- phenanthroline ethylenediamine tetraacetic acid, bipyridine and the like.
- the content of the substance that captures metal ions in the lubricant is not particularly limited, but is, for example, 0.01 to 20% by mass.
- the lower limit value is preferably 0.05% by mass or more, more preferably 0.1% by mass or more, and further preferably 0.5% by mass or more.
- the upper limit value is preferably 10% by mass or less, more preferably 5% by mass or less, and further preferably 3% by mass or less.
- the lubricating oil of the present invention has other components such as a cleaning dispersant, an antioxidant, a load-bearing additive, a rust inhibitor, a corrosion inhibitor, a viscosity index improver, a pour point lowering agent, an antifoaming agent, and an emulsifier. , Anti-emulsifier, antifungal agent, thickener and the like may be added.
- FIG. 1 is a schematic explanatory view of an industrial robot 100 including a speed reducing device according to the first embodiment.
- the industrial robot 100 of the present invention has a base 1, a swivel 2 which is installed on the base 1 and can swivel with respect to a vertical axis, and a first arm 3 and a second arm which are sequentially connected from the swivel 2. It has a configuration having 4 and a third arm portion 5, and a grip portion 6 attached to the tip of the third arm portion 5.
- first joint portion 7 is between the swivel base 2 and the first arm portion 3
- second joint portion 8 is between the first arm portion 3 and the second arm portion 4
- the second arm portions 4 and the third are located between the first arm portion 3 and the second arm portion 4.
- a third joint portion 9 is provided between the arm portions 5, and a fourth joint portion 10 is provided between the third arm portion 5 and the grip portion 6, and the arm can be bent or rotated at each joint portion.
- FIG. 2 is a schematic explanatory view of the speed reducer 101 according to the first embodiment of the present invention.
- the speed reduction device 101 is provided in the first joint portion 7 that performs the refraction operation of the first arm 3.
- the reduction gear is applied to each joint of the industrial robot 100 shown in FIG.
- the speed reducer 101 is an eccentric swing type speed reducer, and includes a main body 25 inside the casing formed by the first case portion 22 and the second case portion 23, and is provided outside the casing.
- the motor 21 is installed in the coaxial direction with the main body shaft 26 of the main body 25.
- the outer surface of the main body 25 and the inner surface of the casing are supported so as to be relatively rotatable via bearings 27a and 27b, and the main body 25 is rotatable about the main body shaft 26 inside the casing.
- the motor 21 is attached by inserting the motor shaft 24 into the casing.
- a gear 28a is provided at the tip of the motor shaft 24, and the gear 28a is installed so as to mesh with the gear 28b fixed to one end of the crankshaft 29, which will be described later.
- the crankshaft 29 is provided at three locations around the main body shaft 26 of the main body 25.
- the gear 28a of the motor shaft 24 and the gear 28b of the crankshaft 29 are arranged in the space formed by the casing, the motor 21, and the main body 25. Further, a seal portion 33 is provided between the casing and the motor 21, and a seal portion 32 is provided between the casing and the main body portion 25, so that the space inside the casing is a closed space. Inside this space, a lubricant holding portion 34 for filling a lubricant containing a compound that captures metal ions is formed.
- the crankshaft 29 is inserted into the main body 25 in parallel with the main body shaft 26, two bearings are installed between the main body 25 and the crankshaft 29, and the crankshaft 29 is rotatably attached. Further, an external gear 30 is arranged on the outer periphery of the eccentric portion provided on the crankshaft 29 via a bearing, and the external gear 30 is installed so as to mesh with the internal gear 31 fixed to the casing. Has been done. Then, in the space where the internal gear 31 and the external gear 30 are installed, a lubricant holding portion 35 for filling a lubricant containing a compound that captures metal ions is formed.
- the lubricant holding portions 34 and 35 are provided with a lubricant containing a compound that captures metal ions. Therefore, even when metal ions are generated from the casing, the main body 25, the gears 28a and 28b, the crankshaft 29, the external gear 30, the internal gear 31, the bearings 27a, 27b, etc., the metal ions are generated by the compound that captures the metal ions. It is possible to reduce the action of the above, suppress the deterioration of the lubricating oil, and suppress the corrosion of each metal member. As a result, corrosion of the metal member in contact with the seal portion 32 and the seal portion 33 is suppressed, so that leakage of the lubricant can also be suppressed.
- FIG. 3 is a schematic explanatory view of the speed reducing device 102 according to the second embodiment of the present invention.
- the speed reducer 102 of the second embodiment is an example of a hypoid speed reducer which is an orthogonal axis type speed reducer.
- This speed reducer (hypoid speed reducer) 102 is a combination of a hypoid type one-stage speed reduction unit (orthogonal speed reduction unit) 41 and a motor 40.
- the reduction gear 41 has a gear box 42 as an outer shell
- the motor 40 has a motor casing 43 as an outer shell.
- the motor casing 43 includes a motor frame 44, a front cover 45, and a rear cover 46.
- the speed reduction unit 41 and the motor 40 are connected to each other by connecting the front cover 45 and the gear box 42 with bolts or the like in a state where the front cover 45 of the motor casing 43 is in-row fitted to the side opening of the gear box 42. It is firmly integrated.
- the motor 40 rotatably supports the motor shaft 47 with the front bearing 48 fitted to the front cover 45 and the rear bearing 49 fitted to the rear cover 46 so as to give rotational power to the motor shaft 47. It is configured.
- a seal portion 50 is provided on the front side of the front bearing 48 fitted to the front cover 45 so that the lubricant does not enter the motor 40 side from the speed reduction portion 41 side.
- a cooling fan 51 directly connected to the motor shaft 47 is provided, and the cooling air W for air cooling is circulated forward along the outer circumference of the motor 40.
- Cooling fins 52 extending in the front-rear direction are provided on the outer periphery of the motor casing 43, and the motor 40 is cooled by the cooling air W flowing along the cooling fins 52.
- the cooling air W flows from the front end opening 53 of the passage between the cooling fins 52 to the speed reducing portion 41 side.
- the reduction gear 41 includes an input shaft 54 integrated with the motor shaft 47, an output shaft 55 composed of a hollow shaft (hollow shaft) arranged orthogonal to the input shaft 54, and a hypoid formed on the input shaft 54.
- a hypoid gear set consisting of a hypoid gear 57 mounted on a pinion 56 and an output shaft 55, and two bearings 58a and 58b that rotatably support the output shaft 55 at positions on both sides in the axial direction sandwiching the hypoid gear 57, and these two. It is provided with a gear box 42 for fitting and holding the two bearings 58a and 58b.
- the gear box 42 can be attached to and detached from the gear box main body 59 in which one side of the output shaft 55 in the axial direction is open and the gear box main body 59 with a bolt (not shown) in a state where the open side of the gear box main body 59 is closed.
- the first bearing 58a is fitted to the gearbox body 59 and is fitted to the gearbox body 59, and is composed of the gearbox lid 60. Is fitted to the gearbox lid 60.
- Seal portions 62 and 61 are provided on the outside of the bearings 58a and 58b. Further, an O-ring (not shown) for preventing leakage of the lubricant is also provided between the gear box main body 59 and the gear box lid 60.
- the motor 40 is coupled to the side surface of the gearbox body 59 side orthogonal to the surface to which the gearbox lid 60 is coupled.
- the meshing surface of the hypoid gear 57 with respect to the hypoid pinion 56 faces the gearbox lid 60 side, and the back of the hypoid gear 57 faces the gearbox body 59 side.
- the back surface of the hypoid gear 57 is received in the axial direction via the spacer 64 by the inner ring of the first bearing 58a fitted to the gear box main body 59 side.
- the output shaft 55 made of a hollow shaft penetrates the gear box 42, one end in the axial direction is exposed to the outside through a through hole formed in the gear box main body 59, and the other end is a penetration formed in the gear box lid 60. It is exposed to the outside from the hole. Then, the driven shaft can be inserted and connected from either one end side or the other end side. Therefore, a key groove (not shown) is provided on the inner circumference of the hollow hole of the output shaft 55 over the entire length.
- At least the portion (inner peripheral wall) of the inner peripheral portion of the gear box 42 corresponding to the outer peripheral portion of the hypoid gear 57 has a (almost) cylindrical shape concentric with the hypoid gear 57.
- a lubricant holding portion 63 for accommodating the lubricant is secured on the axial hypoid pinion 56 side (the meshing surface side of the hypoid gear 57) of the hypoid gear 57 in the gear box 42. Further, the lubricant is also contained in the back surface side (opposite side to the meshing surface) of the hypoid gear 57.
- the lubricant holding portion 63 is filled and sealed with a lubricant containing a compound that captures metal ions.
- the lubricant holding portion 63 is a continuous space from the meshing surface of the hypoid gear 57 to the bearing 58b on the gear box lid 60 side, it is a sufficiently wide space, and there is a sufficient amount of lubricant. Is secured.
- the rotation of the motor shaft 47 is bent in the 90-degree direction by the engagement of the hypoid pinion 56 and the hypoid gear 57 and transmitted to the output shaft 55, and is taken out from the output shaft 55 to the outside.
- a sufficient amount of lubricant is contained in the gear box 42, it is possible to perform good lubrication to the hypoid gear set while suppressing the temperature rise of the lubricant. Therefore, the life can be maintained for a long time while preventing the deterioration of the lubricant.
- the lubricant holding portion 63 is provided with a lubricant containing a compound that captures metal ions, the inner peripheral surface of the gearbox 42, the outer peripheral surface of the output shaft 55, the hypoid pinion 56, and the hypoid gear
- the action of the metal ions can be reduced by the compound that captures the metal ions, deterioration of the lubricant can be suppressed, and corrosion of each metal member can be suppressed. be able to.
- corrosion of the metal member in contact with the sealing portions 50, 61, 62 can be suppressed, so that leakage of the lubricant can be suppressed.
- the speed reducer of the present invention is used, for example, in a motor such as an output shaft of a prime mover, a final speed reducer of an automobile, an industrial use, and a railway vehicle.
- the reduction gear include parallel shaft type reduction gears such as parallel shaft gear reduction gears and helical reduction gears, orthogonal shaft type reduction gears such as worm reduction gears, bevel gear reduction gears and hypoid reduction gears, planetary gear reduction gears and wave gears. It is used for concentric shaft type reduction gears such as reduction gears and cycloid drives, and traction drive type reduction gears such as roller reduction gears.
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Abstract
[Problem]The present invention addresses the problem of providing a speed reducing gear capable of suppressing deterioration of lubricating oil. [Solution] In order to solve the abovementioned problem, provided is a speed reducing gear in which a lubricant is enclosed, the speed reducing gear being characterized by having, in a portion that contacts the lubricant, a metal member configured by metal, wherein the lubricant includes a substance that captures metal ions generated from the metal member. According to the present invention, the speed reducing gear holds a lubricant including a substance that captures metal ions, and thus exhibits effects that, even in the case that metal ions are generated from the metal member that contacts the lubricant, the action of metal ions is reduced by means of a substance that captures the metal ions, thereby suppressing the deterioration of the lubricant and the corrosion of the metal member.
Description
本発明は、減速装置、減速装置の腐食防止方法、潤滑剤、潤滑剤の製造方法および添加剤に関するものである。
The present invention relates to a speed reducer, a method for preventing corrosion of the speed reducer, a lubricant, a method for producing a lubricant, and an additive.
減速装置などの機械には、潤滑油が収容されており、摺動部に生じる摩擦を軽減している。潤滑油は、鉄粉などの汚染物質により劣化することが知られており、潤滑油の劣化を抑制する方法が検討されている。例えば、特許文献1には、直交減速装置において、潤滑油の温度上昇に起因した劣化を抑制するために、潤滑油を収容するための空間を大きくする手段や、冷却風により冷却することにより潤滑油の温度の上昇を抑制する手段などが開示されている。
Lubricating oil is contained in machines such as speed reducers to reduce friction generated in sliding parts. Lubricating oil is known to be deteriorated by pollutants such as iron powder, and methods for suppressing deterioration of lubricating oil are being studied. For example, in Patent Document 1, in an orthogonal speed reducer, in order to suppress deterioration due to a temperature rise of the lubricating oil, a means for increasing the space for accommodating the lubricating oil or cooling by cooling with cooling air is used for lubrication. Means for suppressing an increase in oil temperature and the like are disclosed.
しかしながら、従来の潤滑油の劣化抑制方法には改善の余地があった。
そこで、本発明の課題は、潤滑油の劣化を抑制できる減速装置を提供することである。 However, there is room for improvement in the conventional method for suppressing deterioration of lubricating oil.
Therefore, an object of the present invention is to provide a speed reducing device capable of suppressing deterioration of the lubricating oil.
そこで、本発明の課題は、潤滑油の劣化を抑制できる減速装置を提供することである。 However, there is room for improvement in the conventional method for suppressing deterioration of lubricating oil.
Therefore, an object of the present invention is to provide a speed reducing device capable of suppressing deterioration of the lubricating oil.
本発明者は、上記の課題について鋭意検討した結果、潤滑油が封入される装置(例えば、減速装置)の金属部品から潤滑油中に溶け出した金属イオンが触媒として作用し、潤滑油が酸化劣化していることを見出した。さらに、潤滑油の酸化劣化により腐食性物質が発生し、当該腐食性物質により、金属部材が腐食され、その結果、潤滑油の漏れ等の問題が引き起こされていることを見出した。そこで、金属イオンを捕捉する物質を含む潤滑剤を使用することにより、潤滑油の酸化劣化、ひいては金属部材の腐食を抑制できることを見出して、本発明を完成した。
すなわち、本発明は、以下の減速装置、減速装置の腐食抑制方法、潤滑剤、潤滑剤の製造方法、添加剤である。 As a result of diligent studies on the above problems, the present inventor acts as a catalyst for metal ions dissolved in the lubricating oil from the metal parts of the device (for example, a speed reducer) in which the lubricating oil is sealed, and the lubricating oil is oxidized. I found that it was deteriorating. Furthermore, it has been found that a corrosive substance is generated due to oxidative deterioration of the lubricating oil, and the corrosive substance corrodes the metal member, resulting in problems such as leakage of the lubricating oil. Therefore, they have found that by using a lubricant containing a substance that traps metal ions, oxidative deterioration of the lubricating oil and eventually corrosion of metal members can be suppressed, and the present invention has been completed.
That is, the present invention is the following reduction gear, a method for suppressing corrosion of the reduction gear, a lubricant, a method for producing a lubricant, and an additive.
すなわち、本発明は、以下の減速装置、減速装置の腐食抑制方法、潤滑剤、潤滑剤の製造方法、添加剤である。 As a result of diligent studies on the above problems, the present inventor acts as a catalyst for metal ions dissolved in the lubricating oil from the metal parts of the device (for example, a speed reducer) in which the lubricating oil is sealed, and the lubricating oil is oxidized. I found that it was deteriorating. Furthermore, it has been found that a corrosive substance is generated due to oxidative deterioration of the lubricating oil, and the corrosive substance corrodes the metal member, resulting in problems such as leakage of the lubricating oil. Therefore, they have found that by using a lubricant containing a substance that traps metal ions, oxidative deterioration of the lubricating oil and eventually corrosion of metal members can be suppressed, and the present invention has been completed.
That is, the present invention is the following reduction gear, a method for suppressing corrosion of the reduction gear, a lubricant, a method for producing a lubricant, and an additive.
上記課題を解決するための本発明の減速装置は、潤滑剤が封入された減速装置であって、減速装置は、潤滑剤と接する部分に金属から構成される金属部材を有し、潤滑剤は、金属部材から生じた金属イオンを捕捉する物質を含むことを特徴とする。
本発明の減速装置によれば、金属イオンを捕捉する物質を含む潤滑剤を保持しているため、潤滑剤と接触する金属部材から金属イオンが生じた場合でも、金属イオンを捕捉する物質により金属イオンの作用を低減され、潤滑油の酸化劣化、ひいては金属部材の腐食を抑制することができるという作用効果を奏する。これにより、例えば潤滑剤の漏れを抑制できる。 The speed reducing device of the present invention for solving the above problems is a speed reducing device in which a lubricant is sealed, and the speed reducing device has a metal member made of metal at a portion in contact with the lubricant, and the lubricant is , It is characterized by containing a substance that captures metal ions generated from a metal member.
According to the speed reducer of the present invention, since the lubricant containing the substance that captures the metal ion is held, even if the metal ion is generated from the metal member in contact with the lubricant, the metal due to the substance that captures the metal ion is used. The action of ions is reduced, and the oxidative deterioration of the lubricating oil and the corrosion of metal members can be suppressed. Thereby, for example, leakage of the lubricant can be suppressed.
本発明の減速装置によれば、金属イオンを捕捉する物質を含む潤滑剤を保持しているため、潤滑剤と接触する金属部材から金属イオンが生じた場合でも、金属イオンを捕捉する物質により金属イオンの作用を低減され、潤滑油の酸化劣化、ひいては金属部材の腐食を抑制することができるという作用効果を奏する。これにより、例えば潤滑剤の漏れを抑制できる。 The speed reducing device of the present invention for solving the above problems is a speed reducing device in which a lubricant is sealed, and the speed reducing device has a metal member made of metal at a portion in contact with the lubricant, and the lubricant is , It is characterized by containing a substance that captures metal ions generated from a metal member.
According to the speed reducer of the present invention, since the lubricant containing the substance that captures the metal ion is held, even if the metal ion is generated from the metal member in contact with the lubricant, the metal due to the substance that captures the metal ion is used. The action of ions is reduced, and the oxidative deterioration of the lubricating oil and the corrosion of metal members can be suppressed. Thereby, for example, leakage of the lubricant can be suppressed.
また、上記課題を解決するための本発明の減速装置の腐食抑制方法は、潤滑剤が封入された減速装置の腐食抑制方法であって、潤滑剤に、金属部材から生じた金属イオンを捕捉する物質を添加するステップと、減速装置の金属から構成される金属部材に対して、金属イオンを捕捉する物質を含む潤滑剤を接触させるステップと、を備えることを特徴とする。
本発明の減速装置の腐食抑制方法によれば、潤滑剤に、金属イオンを捕捉する物質を添加し、この潤滑剤を金属部材に接触させるため、潤滑剤と接触する金属部材から金属イオンが生じた場合でも、金属イオンを捕捉する物質により金属イオンの作用を低減され、潤滑油の酸化劣化、ひいては金属部材の腐食を抑制することができる。 Further, the method for suppressing corrosion of the speed reducer of the present invention for solving the above problems is a method for suppressing corrosion of a speed reducer in which a lubricant is sealed, and the lubricant captures metal ions generated from a metal member. It is characterized by comprising a step of adding a substance and a step of bringing a lubricant containing a substance that captures metal ions into contact with a metal member made of metal of the speed reducer.
According to the method for suppressing corrosion of the speed reducer of the present invention, a substance that traps metal ions is added to the lubricant, and the lubricant is brought into contact with the metal member, so that metal ions are generated from the metal member that comes into contact with the lubricant. Even in such a case, the action of the metal ion can be reduced by the substance that captures the metal ion, and the oxidative deterioration of the lubricating oil and the corrosion of the metal member can be suppressed.
本発明の減速装置の腐食抑制方法によれば、潤滑剤に、金属イオンを捕捉する物質を添加し、この潤滑剤を金属部材に接触させるため、潤滑剤と接触する金属部材から金属イオンが生じた場合でも、金属イオンを捕捉する物質により金属イオンの作用を低減され、潤滑油の酸化劣化、ひいては金属部材の腐食を抑制することができる。 Further, the method for suppressing corrosion of the speed reducer of the present invention for solving the above problems is a method for suppressing corrosion of a speed reducer in which a lubricant is sealed, and the lubricant captures metal ions generated from a metal member. It is characterized by comprising a step of adding a substance and a step of bringing a lubricant containing a substance that captures metal ions into contact with a metal member made of metal of the speed reducer.
According to the method for suppressing corrosion of the speed reducer of the present invention, a substance that traps metal ions is added to the lubricant, and the lubricant is brought into contact with the metal member, so that metal ions are generated from the metal member that comes into contact with the lubricant. Even in such a case, the action of the metal ion can be reduced by the substance that captures the metal ion, and the oxidative deterioration of the lubricating oil and the corrosion of the metal member can be suppressed.
また、上記課題を解決するための本発明の潤滑剤は、潤滑油、及び、金属イオンを捕捉する物質を含むことを特徴とする。
この潤滑剤によれば、金属部材からなる摺動部を有する種々の装置において、摺動部の摩擦を抑制しつつ、さらには、潤滑油の劣化、ひいては潤滑剤と接触する金属部材の腐食を抑制することができる。 Further, the lubricant of the present invention for solving the above problems is characterized by containing a lubricating oil and a substance that traps metal ions.
According to this lubricant, in various devices having a sliding portion made of a metal member, friction of the sliding portion is suppressed, and further, deterioration of the lubricating oil and corrosion of the metal member in contact with the lubricant are prevented. It can be suppressed.
この潤滑剤によれば、金属部材からなる摺動部を有する種々の装置において、摺動部の摩擦を抑制しつつ、さらには、潤滑油の劣化、ひいては潤滑剤と接触する金属部材の腐食を抑制することができる。 Further, the lubricant of the present invention for solving the above problems is characterized by containing a lubricating oil and a substance that traps metal ions.
According to this lubricant, in various devices having a sliding portion made of a metal member, friction of the sliding portion is suppressed, and further, deterioration of the lubricating oil and corrosion of the metal member in contact with the lubricant are prevented. It can be suppressed.
また、上記課題を解決するための本発明の潤滑剤の製造方法は、潤滑油に金属イオンを捕捉する物質を添加するステップを備えることを特徴とする。
この潤滑剤の製造方法によれば、潤滑油に、金属イオンを捕捉する物質を添加するため、潤滑剤と接触する金属部材から金属イオンが生じた場合でも、金属イオンを捕捉する物質により金属イオンの作用を低減し、潤滑油の劣化、ひいては金属部材の腐食を抑制することができる潤滑剤を提供することができる。 Further, the method for producing a lubricant of the present invention for solving the above problems is characterized by comprising a step of adding a substance that traps metal ions to the lubricating oil.
According to this method for producing a lubricant, a substance that traps metal ions is added to the lubricating oil. Therefore, even if metal ions are generated from a metal member that comes into contact with the lubricant, the metal ions are generated by the substance that captures the metal ions. It is possible to provide a lubricant capable of reducing the action of the lubricant and suppressing the deterioration of the lubricating oil and the corrosion of the metal member.
この潤滑剤の製造方法によれば、潤滑油に、金属イオンを捕捉する物質を添加するため、潤滑剤と接触する金属部材から金属イオンが生じた場合でも、金属イオンを捕捉する物質により金属イオンの作用を低減し、潤滑油の劣化、ひいては金属部材の腐食を抑制することができる潤滑剤を提供することができる。 Further, the method for producing a lubricant of the present invention for solving the above problems is characterized by comprising a step of adding a substance that traps metal ions to the lubricating oil.
According to this method for producing a lubricant, a substance that traps metal ions is added to the lubricating oil. Therefore, even if metal ions are generated from a metal member that comes into contact with the lubricant, the metal ions are generated by the substance that captures the metal ions. It is possible to provide a lubricant capable of reducing the action of the lubricant and suppressing the deterioration of the lubricating oil and the corrosion of the metal member.
また、上記課題を解決するための本発明の添加剤は、潤滑剤に添加する添加剤であって、前記添加剤は、金属イオンを捕捉する物質であることを特徴とする。
この添加剤によれば、潤滑油に添加することにより、潤滑油の劣化、ひいては減速装置等の種々の装置の金属部材の腐食を抑制することが可能な潤滑剤を得ることができる。 Further, the additive of the present invention for solving the above-mentioned problems is an additive added to a lubricant, and the additive is a substance that captures metal ions.
According to this additive, by adding it to the lubricating oil, it is possible to obtain a lubricant capable of suppressing deterioration of the lubricating oil and, by extension, corrosion of metal members of various devices such as a speed reducer.
この添加剤によれば、潤滑油に添加することにより、潤滑油の劣化、ひいては減速装置等の種々の装置の金属部材の腐食を抑制することが可能な潤滑剤を得ることができる。 Further, the additive of the present invention for solving the above-mentioned problems is an additive added to a lubricant, and the additive is a substance that captures metal ions.
According to this additive, by adding it to the lubricating oil, it is possible to obtain a lubricant capable of suppressing deterioration of the lubricating oil and, by extension, corrosion of metal members of various devices such as a speed reducer.
本発明によると、潤滑油の劣化を抑制できる減速装置を提供することができる。
According to the present invention, it is possible to provide a speed reducing device capable of suppressing deterioration of lubricating oil.
[減速装置]
本発明の減速装置は、潤滑剤が封入された減速装置であって、減速装置は、潤滑剤と接する部分に金属から構成される金属部材を有し、潤滑剤は、金属部材から生じた金属イオンを捕捉する物質を含むことを特徴とするものである。 [Reducer]
The speed reducing device of the present invention is a speed reducing device in which a lubricant is sealed, and the speed reducing device has a metal member composed of a metal at a portion in contact with the lubricant, and the lubricant is a metal generated from the metal member. It is characterized by containing a substance that captures ions.
本発明の減速装置は、潤滑剤が封入された減速装置であって、減速装置は、潤滑剤と接する部分に金属から構成される金属部材を有し、潤滑剤は、金属部材から生じた金属イオンを捕捉する物質を含むことを特徴とするものである。 [Reducer]
The speed reducing device of the present invention is a speed reducing device in which a lubricant is sealed, and the speed reducing device has a metal member composed of a metal at a portion in contact with the lubricant, and the lubricant is a metal generated from the metal member. It is characterized by containing a substance that captures ions.
本発明の減速装置は、潤滑油と接触する金属部材の腐食の原因として、潤滑油に含まれる金属イオンが金属部材の腐食を促進しているとの知見に基づいて発明されたものであり、潤滑油に含まれる金属イオンを捕捉するというものである。より具体的には、減速装置の金属部材から潤滑油中に溶け出した金属イオンが触媒として作用し、潤滑油を酸化劣化させていることを見出した。そして、潤滑油の酸化劣化により腐食性物質が生成され、金属部材が腐食されていることを見出した。さらに、例えば、金属部材としての軸とオイルシールとの接触部分が腐食されることにより、潤滑油漏れが発生していたことを見出した。一方、従前の技術では、潤滑油に含まれる鉄粉などの粒子に着目して、これをろ過等で取り除くという処理を行っていたため金属イオンが除去されていなかった。本発明の減速装置によれば、金属イオンを捕捉する物質を含む潤滑剤を保持しているため、潤滑剤と接触する金属部材から金属イオンが生じた場合でも、金属イオンを捕捉する物質により金属イオンの作用を低減され、潤滑油の酸化劣化、ひいては金属部材の腐食を抑制することが可能である。その結果、金属部材の腐食に起因した潤滑剤漏れも抑制できる。
The speed reducer of the present invention was invented based on the finding that the metal ions contained in the lubricating oil promote the corrosion of the metal member as a cause of the corrosion of the metal member in contact with the lubricating oil. It captures metal ions contained in the lubricating oil. More specifically, it has been found that the metal ions dissolved in the lubricating oil from the metal member of the speed reducer act as a catalyst to oxidatively deteriorate the lubricating oil. Then, it was found that a corrosive substance was generated due to oxidative deterioration of the lubricating oil, and the metal member was corroded. Further, it was found that, for example, a lubricating oil leak occurred due to corrosion of the contact portion between the shaft as a metal member and the oil seal. On the other hand, in the conventional technique, the metal ions were not removed because the particles such as iron powder contained in the lubricating oil were focused on and removed by filtration or the like. According to the speed reducer of the present invention, since the lubricant containing the substance that captures the metal ion is held, even if the metal ion is generated from the metal member in contact with the lubricant, the metal due to the substance that captures the metal ion It is possible to reduce the action of ions and suppress oxidative deterioration of the lubricating oil and, by extension, corrosion of metal members. As a result, lubricant leakage due to corrosion of the metal member can be suppressed.
減速装置は、歯車等で動力の回転速度を減じて出力する機械装置である。出力としては、歯数比やプーリー比などの減速比に比例したトルクを得ることができる。減速装置は、主に原動機の出力軸に用いられるが、自動車の最終減速機のように、変速機の後段に用いる場合もある。また、産業用、鉄道車両用などでは、モータと組み合わせている場合が多い。その他、船舶のスクリュープロペラや航空機のプロペラ駆動にも利用されている。
The speed reducer is a mechanical device that outputs by reducing the rotation speed of power with gears or the like. As an output, a torque proportional to a reduction ratio such as a gear ratio or a pulley ratio can be obtained. The reduction gear is mainly used for the output shaft of the prime mover, but it may also be used in the rear stage of the transmission, such as the final reduction gear of an automobile. In addition, it is often combined with a motor for industrial use and railroad vehicle use. In addition, it is also used to drive ship screw propellers and aircraft propellers.
本発明の減速装置は、金属部材を有し、封入された潤滑剤と金属部材が接触するものであれば、特に制限されない。例えば、平行軸歯車減速機やヘリカル減速機などの平行軸型減速装置、ウォーム減速機やベベルギア減速機やハイポイド減速機などの直交軸型減速装置、遊星歯車減速機や波動歯車減速機やサイクロイドドライブなどの同芯軸型減速装置、ローラ減速機などのトラクションドライブ型減速装置などが挙げられる。
The speed reducer of the present invention is not particularly limited as long as it has a metal member and the enclosed lubricant and the metal member come into contact with each other. For example, parallel shaft reducers such as parallel shaft gear reducers and helical reducers, orthogonal shaft reducers such as worm reducers, bevel gear reducers and hypoid reducers, planetary gear reducers, wave gear reducers and cycloid drives. Examples thereof include a concentric shaft type reduction gear such as, and a traction drive type reduction gear such as a roller reduction gear.
[潤滑剤]
本発明の潤滑剤は、潤滑油の劣化を抑制するため、ひいては金属部材の腐食を抑制するための潤滑剤であって、潤滑油、及び、金属イオンを捕捉する物質を含むことを特徴とするものである。つまり、本明細書においては、部材同士の摺動部における摩擦や摩耗の抑制、あるいは発熱の抑制のための潤滑成分を有し、金属イオンを捕捉する物質を含まないものを「潤滑油」と表現し、当該潤滑油に金属イオンを捕捉する物質を添加剤として添加したものを「潤滑剤」と表現している。
この潤滑剤によれば、金属部材からなる摺動部を有する種々の装置において、摺動部の摩擦や摩耗を抑制しつつ、さらには、潤滑油の劣化を抑制し、ひいては潤滑剤と接触する金属部材の腐食を抑制することができる。つまり、本発明の潤滑剤が適用できる装置は、減速装置に限られるものではなく、潤滑剤と接触する金属部材を有する各種装置に適用可能である。例えば、金属製の軸受を有する装置、金属製のロッドを有するシリンダ装置、ボールネジ装置などにも適用可能である。 [lubricant]
The lubricant of the present invention is a lubricant for suppressing deterioration of the lubricating oil and thus for suppressing corrosion of metal members, and is characterized by containing the lubricating oil and a substance that traps metal ions. It is a thing. That is, in the present specification, "lubricating oil" has a lubricating component for suppressing friction and wear in sliding portions between members or suppressing heat generation, and does not contain a substance that traps metal ions. It is expressed as a "lubricant" in which a substance that captures metal ions is added as an additive to the lubricating oil.
According to this lubricant, in various devices having a sliding portion made of a metal member, friction and wear of the sliding portion are suppressed, deterioration of the lubricating oil is suppressed, and eventually, the lubricant comes into contact with the lubricant. It is possible to suppress corrosion of metal members. That is, the device to which the lubricant of the present invention can be applied is not limited to the speed reducing device, but can be applied to various devices having a metal member in contact with the lubricant. For example, it can be applied to a device having a metal bearing, a cylinder device having a metal rod, a ball screw device, and the like.
本発明の潤滑剤は、潤滑油の劣化を抑制するため、ひいては金属部材の腐食を抑制するための潤滑剤であって、潤滑油、及び、金属イオンを捕捉する物質を含むことを特徴とするものである。つまり、本明細書においては、部材同士の摺動部における摩擦や摩耗の抑制、あるいは発熱の抑制のための潤滑成分を有し、金属イオンを捕捉する物質を含まないものを「潤滑油」と表現し、当該潤滑油に金属イオンを捕捉する物質を添加剤として添加したものを「潤滑剤」と表現している。
この潤滑剤によれば、金属部材からなる摺動部を有する種々の装置において、摺動部の摩擦や摩耗を抑制しつつ、さらには、潤滑油の劣化を抑制し、ひいては潤滑剤と接触する金属部材の腐食を抑制することができる。つまり、本発明の潤滑剤が適用できる装置は、減速装置に限られるものではなく、潤滑剤と接触する金属部材を有する各種装置に適用可能である。例えば、金属製の軸受を有する装置、金属製のロッドを有するシリンダ装置、ボールネジ装置などにも適用可能である。 [lubricant]
The lubricant of the present invention is a lubricant for suppressing deterioration of the lubricating oil and thus for suppressing corrosion of metal members, and is characterized by containing the lubricating oil and a substance that traps metal ions. It is a thing. That is, in the present specification, "lubricating oil" has a lubricating component for suppressing friction and wear in sliding portions between members or suppressing heat generation, and does not contain a substance that traps metal ions. It is expressed as a "lubricant" in which a substance that captures metal ions is added as an additive to the lubricating oil.
According to this lubricant, in various devices having a sliding portion made of a metal member, friction and wear of the sliding portion are suppressed, deterioration of the lubricating oil is suppressed, and eventually, the lubricant comes into contact with the lubricant. It is possible to suppress corrosion of metal members. That is, the device to which the lubricant of the present invention can be applied is not limited to the speed reducing device, but can be applied to various devices having a metal member in contact with the lubricant. For example, it can be applied to a device having a metal bearing, a cylinder device having a metal rod, a ball screw device, and the like.
(潤滑油)
潤滑油は、例えば減速装置の歯車や軸受など、機械装置の摺動部を効率よく潤滑するための油である。潤滑油としては、公知のオイルやグリースを採用可能であるが、これに限定されるものではない。潤滑油としては、例えば、鉱物油、合成油、植物油、動物油に大別される。鉱物油は、石油の精製により得られる潤滑油であり、例えば、パラフィン系鉱物油、ナフテン系鉱物油などが挙げられる。合成油は、化学合成により得られた潤滑油であり、例えば、ポリアルファオレフィン、アルファオレフィンオレゴマー、ポリブデン、アルキルベンゼン、シクロアルカン類などの炭化水素系合成油、モノエステル、ジエステル、ポリオールエステル、リン酸エステル、ケイ酸エステルなどのエステル系合成油、ポリグリコール、フェニルエーテルなどのエーテル系合成油、ハロカーボンなどのフッ素系合成油などが挙げられる。植物油は、植物由来の潤滑油であり、例えば、パーム油、菜種油、ヒマシ油、大豆油、亜麻仁油、ヒマワリ油、オリーブ油、ヤシ油、パーム核油、コメ油、トウモロコシ油、又はこれらの分別油、硬化油、エステル交換油などの植物油脂、ポリオキシアルキレン化油脂、塩素化油、硫化油、重合油、ワックス、脂肪酸、脂肪酸誘導体、セッケン、エステル化油、アミド化油、ポリオキシアルキレン付加体などが挙げられる。動物油は、動物由来の潤滑油であり、例えば、牛脂、豚脂、羊脂、鯨油、イワシ油、ニシン油、乳脂などが挙げられる。 (Lubricant)
Lubricating oil is oil for efficiently lubricating sliding parts of mechanical devices such as gears and bearings of speed reducing devices. As the lubricating oil, known oils and greases can be used, but the lubricating oil is not limited thereto. Lubricating oils are roughly classified into, for example, mineral oils, synthetic oils, vegetable oils, and animal oils. The mineral oil is a lubricating oil obtained by refining petroleum, and examples thereof include paraffin-based mineral oil and naphthen-based mineral oil. Synthetic oils are lubricating oils obtained by chemical synthesis, for example, hydrocarbon-based synthetic oils such as polyalphaolefins, alphaolefin olegomers, polybudens, alkylbenzenes, cycloalkans, monoesters, diesters, polyol esters, phosphorus. Examples thereof include ester-based synthetic oils such as acid esters and silicate esters, ether-based synthetic oils such as polyglycol and phenyl ether, and fluorine-based synthetic oils such as halocarbon. The vegetable oil is a plant-derived lubricating oil, for example, palm oil, rapeseed oil, sunflower oil, soybean oil, flaxseed oil, sunflower oil, olive oil, palm oil, palm kernel oil, rice oil, corn oil, or a fractionated oil thereof. , Hardened oils, vegetable oils such as ester exchange oils, polyoxyalkyleneized oils, chlorinated oils, sulfide oils, polymerized oils, waxes, fatty acids, fatty acid derivatives, shavings, esterified oils, amidated oils, polyoxyalkylene adducts And so on. The animal oil is a lubricating oil derived from animals, and examples thereof include beef tallow, lard, sheep tallow, whale oil, sardine oil, herring oil, and milk fat.
潤滑油は、例えば減速装置の歯車や軸受など、機械装置の摺動部を効率よく潤滑するための油である。潤滑油としては、公知のオイルやグリースを採用可能であるが、これに限定されるものではない。潤滑油としては、例えば、鉱物油、合成油、植物油、動物油に大別される。鉱物油は、石油の精製により得られる潤滑油であり、例えば、パラフィン系鉱物油、ナフテン系鉱物油などが挙げられる。合成油は、化学合成により得られた潤滑油であり、例えば、ポリアルファオレフィン、アルファオレフィンオレゴマー、ポリブデン、アルキルベンゼン、シクロアルカン類などの炭化水素系合成油、モノエステル、ジエステル、ポリオールエステル、リン酸エステル、ケイ酸エステルなどのエステル系合成油、ポリグリコール、フェニルエーテルなどのエーテル系合成油、ハロカーボンなどのフッ素系合成油などが挙げられる。植物油は、植物由来の潤滑油であり、例えば、パーム油、菜種油、ヒマシ油、大豆油、亜麻仁油、ヒマワリ油、オリーブ油、ヤシ油、パーム核油、コメ油、トウモロコシ油、又はこれらの分別油、硬化油、エステル交換油などの植物油脂、ポリオキシアルキレン化油脂、塩素化油、硫化油、重合油、ワックス、脂肪酸、脂肪酸誘導体、セッケン、エステル化油、アミド化油、ポリオキシアルキレン付加体などが挙げられる。動物油は、動物由来の潤滑油であり、例えば、牛脂、豚脂、羊脂、鯨油、イワシ油、ニシン油、乳脂などが挙げられる。 (Lubricant)
Lubricating oil is oil for efficiently lubricating sliding parts of mechanical devices such as gears and bearings of speed reducing devices. As the lubricating oil, known oils and greases can be used, but the lubricating oil is not limited thereto. Lubricating oils are roughly classified into, for example, mineral oils, synthetic oils, vegetable oils, and animal oils. The mineral oil is a lubricating oil obtained by refining petroleum, and examples thereof include paraffin-based mineral oil and naphthen-based mineral oil. Synthetic oils are lubricating oils obtained by chemical synthesis, for example, hydrocarbon-based synthetic oils such as polyalphaolefins, alphaolefin olegomers, polybudens, alkylbenzenes, cycloalkans, monoesters, diesters, polyol esters, phosphorus. Examples thereof include ester-based synthetic oils such as acid esters and silicate esters, ether-based synthetic oils such as polyglycol and phenyl ether, and fluorine-based synthetic oils such as halocarbon. The vegetable oil is a plant-derived lubricating oil, for example, palm oil, rapeseed oil, sunflower oil, soybean oil, flaxseed oil, sunflower oil, olive oil, palm oil, palm kernel oil, rice oil, corn oil, or a fractionated oil thereof. , Hardened oils, vegetable oils such as ester exchange oils, polyoxyalkyleneized oils, chlorinated oils, sulfide oils, polymerized oils, waxes, fatty acids, fatty acid derivatives, shavings, esterified oils, amidated oils, polyoxyalkylene adducts And so on. The animal oil is a lubricating oil derived from animals, and examples thereof include beef tallow, lard, sheep tallow, whale oil, sardine oil, herring oil, and milk fat.
(金属イオンを捕捉する物質)
金属イオンを捕捉する物質は、金属イオンを捕捉して、その作用を低減するものであれば、特に限定されない。ここで、金属イオンとは、減速機の金属部材から潤滑油に溶解するものであり、例えば、鉄(II)イオン、鉄(III)イオン、鉛(II)イオン、アルミニウムイオン、銅(II)イオン、ニッケルイオン、クロム(III)イオン、亜鉛イオン、スズ(II)イオン、スズ(IV)イオン、マンガン(II)イオン、マンガン(IV)イオンなどが挙げられる。 (Substance that captures metal ions)
The substance that captures metal ions is not particularly limited as long as it captures metal ions and reduces their action. Here, the metal ion is one that dissolves in the lubricating oil from the metal member of the speed reducer, and is, for example, iron (II) ion, iron (III) ion, lead (II) ion, aluminum ion, and copper (II). Examples thereof include ions, nickel ions, chromium (III) ions, zinc ions, tin (II) ions, tin (IV) ions, manganese (II) ions and manganese (IV) ions.
金属イオンを捕捉する物質は、金属イオンを捕捉して、その作用を低減するものであれば、特に限定されない。ここで、金属イオンとは、減速機の金属部材から潤滑油に溶解するものであり、例えば、鉄(II)イオン、鉄(III)イオン、鉛(II)イオン、アルミニウムイオン、銅(II)イオン、ニッケルイオン、クロム(III)イオン、亜鉛イオン、スズ(II)イオン、スズ(IV)イオン、マンガン(II)イオン、マンガン(IV)イオンなどが挙げられる。 (Substance that captures metal ions)
The substance that captures metal ions is not particularly limited as long as it captures metal ions and reduces their action. Here, the metal ion is one that dissolves in the lubricating oil from the metal member of the speed reducer, and is, for example, iron (II) ion, iron (III) ion, lead (II) ion, aluminum ion, and copper (II). Examples thereof include ions, nickel ions, chromium (III) ions, zinc ions, tin (II) ions, tin (IV) ions, manganese (II) ions and manganese (IV) ions.
金属イオンを捕捉する物質としては、一例としては、以下の化学式(1)に記載の化合物である。
式中、R1~R12は水素原子又は炭素原子数1~30の炭化水素基を表す。
炭素原子数1~30の炭化水素基は、窒素原子、酸素原子、硫黄原子及びハロゲン原子からなる群より選択される少なくとも1種の原子、窒素原子、酸素原子、硫黄原子、ハロゲン原子等を含む官能基、又は、窒素原子、酸素原子、硫黄原子等を含む連結基を、炭素骨格の内部又は末端に含んでいてもよい。
炭化水素基は、飽和炭化水素基、不飽和炭化水素基、芳香族炭化水素基等のいずれであってもよく、分岐構造、環状構造、炭素-炭素不飽和結合(炭素-炭素二重結合、炭素-炭素三重結合)のそれぞれを有していてもよい。
官能基としては、水酸基(-OH)、カルボキシル基(-COOH)、アミノ基(-NH2)、スルホン酸基(-SO3H)フッ素原子(-F)、塩素原子(-Cl)、臭素原子(-Br)、ヨウ素原子(-I)、メルカプト基(-SH)アルコキシ基等が挙げられる。
連結基としては、エーテル基(-O-)、カルボニル基(-C(=O)-)、オキシカルボニル基(-OC(=O)-)、カルボニルオキシ基(-C(=O)O-)、アミド基(-NHCO-)、チオエーテル基(-S-)等が挙げられる。
炭化水素基としては、例えば、メチル基、エチル基、n-プロピル基、i-プロピル基、n-ブチル基、i-ブチル基、t-ブチル基、ペンチル基、ヘキシル基、シクロヘキシル基、オクチル基、ノニル基、デシル基、フェニル基、ベンジル基、ビニル基、アリル基(-CH2CH=CH2)等が挙げられる。 As an example of the substance that captures metal ions, it is a compound described in the following chemical formula (1).
In the formula, R 1 to R 12 represent a hydrogen atom or a hydrocarbon group having 1 to 30 carbon atoms.
The hydrocarbon group having 1 to 30 carbon atoms includes at least one atom selected from the group consisting of nitrogen atom, oxygen atom, sulfur atom and halogen atom, nitrogen atom, oxygen atom, sulfur atom, halogen atom and the like. A functional group or a connecting group containing a nitrogen atom, an oxygen atom, a sulfur atom and the like may be contained inside or at the end of the carbon skeleton.
The hydrocarbon group may be any of a saturated hydrocarbon group, an unsaturated hydrocarbon group, an aromatic hydrocarbon group and the like, and has a branched structure, a cyclic structure, and a carbon-carbon unsaturated bond (carbon-carbon double bond, It may have each of carbon-carbon triple bond).
Functional groups include hydroxyl groups (-OH), carboxyl groups (-COOH), amino groups (-NH 2 ), sulfonic acid groups (-SO 3 H), fluorine atoms (-F), chlorine atoms (-Cl), and bromine. Examples thereof include an atom (-Br), an iodine atom (-I), a mercapto group (-SH) alkoxy group and the like.
The linking group includes an ether group (-O-), a carbonyl group (-C (= O)-), an oxycarbonyl group (-OC (= O)-), and a carbonyloxy group (-C (= O) O-). ), An amide group (-NHCO-), a thioether group (-S-) and the like.
Examples of the hydrocarbon group include a methyl group, an ethyl group, an n-propyl group, an i-propyl group, an n-butyl group, an i-butyl group, a t-butyl group, a pentyl group, a hexyl group, a cyclohexyl group and an octyl group. , Nonyl group, decyl group, phenyl group, benzyl group, vinyl group, allyl group (-CH 2 CH = CH 2 ) and the like.
炭素原子数1~30の炭化水素基は、窒素原子、酸素原子、硫黄原子及びハロゲン原子からなる群より選択される少なくとも1種の原子、窒素原子、酸素原子、硫黄原子、ハロゲン原子等を含む官能基、又は、窒素原子、酸素原子、硫黄原子等を含む連結基を、炭素骨格の内部又は末端に含んでいてもよい。
炭化水素基は、飽和炭化水素基、不飽和炭化水素基、芳香族炭化水素基等のいずれであってもよく、分岐構造、環状構造、炭素-炭素不飽和結合(炭素-炭素二重結合、炭素-炭素三重結合)のそれぞれを有していてもよい。
官能基としては、水酸基(-OH)、カルボキシル基(-COOH)、アミノ基(-NH2)、スルホン酸基(-SO3H)フッ素原子(-F)、塩素原子(-Cl)、臭素原子(-Br)、ヨウ素原子(-I)、メルカプト基(-SH)アルコキシ基等が挙げられる。
連結基としては、エーテル基(-O-)、カルボニル基(-C(=O)-)、オキシカルボニル基(-OC(=O)-)、カルボニルオキシ基(-C(=O)O-)、アミド基(-NHCO-)、チオエーテル基(-S-)等が挙げられる。
炭化水素基としては、例えば、メチル基、エチル基、n-プロピル基、i-プロピル基、n-ブチル基、i-ブチル基、t-ブチル基、ペンチル基、ヘキシル基、シクロヘキシル基、オクチル基、ノニル基、デシル基、フェニル基、ベンジル基、ビニル基、アリル基(-CH2CH=CH2)等が挙げられる。 As an example of the substance that captures metal ions, it is a compound described in the following chemical formula (1).
The hydrocarbon group having 1 to 30 carbon atoms includes at least one atom selected from the group consisting of nitrogen atom, oxygen atom, sulfur atom and halogen atom, nitrogen atom, oxygen atom, sulfur atom, halogen atom and the like. A functional group or a connecting group containing a nitrogen atom, an oxygen atom, a sulfur atom and the like may be contained inside or at the end of the carbon skeleton.
The hydrocarbon group may be any of a saturated hydrocarbon group, an unsaturated hydrocarbon group, an aromatic hydrocarbon group and the like, and has a branched structure, a cyclic structure, and a carbon-carbon unsaturated bond (carbon-carbon double bond, It may have each of carbon-carbon triple bond).
Functional groups include hydroxyl groups (-OH), carboxyl groups (-COOH), amino groups (-NH 2 ), sulfonic acid groups (-SO 3 H), fluorine atoms (-F), chlorine atoms (-Cl), and bromine. Examples thereof include an atom (-Br), an iodine atom (-I), a mercapto group (-SH) alkoxy group and the like.
The linking group includes an ether group (-O-), a carbonyl group (-C (= O)-), an oxycarbonyl group (-OC (= O)-), and a carbonyloxy group (-C (= O) O-). ), An amide group (-NHCO-), a thioether group (-S-) and the like.
Examples of the hydrocarbon group include a methyl group, an ethyl group, an n-propyl group, an i-propyl group, an n-butyl group, an i-butyl group, a t-butyl group, a pentyl group, a hexyl group, a cyclohexyl group and an octyl group. , Nonyl group, decyl group, phenyl group, benzyl group, vinyl group, allyl group (-CH 2 CH = CH 2 ) and the like.
上記化学式(1)に金属イオン(M)が捕捉された状態を、以下の化学式(2)に示す。
The state in which the metal ion (M) is trapped in the chemical formula (1) is shown in the following chemical formula (2).
金属イオンを捕捉する物質としては、より具体的には、以下の化学式(3)、化学式(4)に記載の化合物である。
More specifically, the substance that captures metal ions is a compound described in the following chemical formulas (3) and (4).
また、金属イオンを捕捉する物質としては、その他にも、例えば、ヘキサシアノ鉄(III)カリウム、ヘキサシアノ鉄(II)カリウムなどのヘキサシアノ鉄塩、チオシアン酸カリウム、チオシアン酸ナトリウムなどのチオシアン酸塩、フェナントロリン、エチレンジアミン四酢酸、ビピリジンなどが挙げられる。
Other substances that capture metal ions include, for example, hexacyanoferrates such as potassium hexacyanoferrate (III) and potassium hexacyanoferrate (II), thiocyanates such as potassium thiocyanate and sodium thiocyanate, and phenanthroline. , Ethylenediamine tetraacetic acid, bipyridine and the like.
潤滑剤中における金属イオンを捕捉する物質の含有量は、特に制限されないが、例えば、0.01~20質量%である。下限値としては、好ましくは0.05質量%以上であり、より好ましくは0.1質量%以上であり、更に好ましくは0.5質量%以上である。上限値としては、好ましくは10質量%以下であり、より好ましくは5質量%以下であり、更に好ましくは3質量%以下である。
The content of the substance that captures metal ions in the lubricant is not particularly limited, but is, for example, 0.01 to 20% by mass. The lower limit value is preferably 0.05% by mass or more, more preferably 0.1% by mass or more, and further preferably 0.5% by mass or more. The upper limit value is preferably 10% by mass or less, more preferably 5% by mass or less, and further preferably 3% by mass or less.
(その他成分)
本発明の潤滑油は、その他の成分として、例えば、清浄分散剤、酸化防止剤、耐荷重添加剤、さび止め剤、腐食防止剤、粘度指数向上剤、流動点降下剤、消泡剤、乳化剤、抗乳化剤、カビ防止剤、増稠剤などを添加してもよい。 (Other ingredients)
The lubricating oil of the present invention has other components such as a cleaning dispersant, an antioxidant, a load-bearing additive, a rust inhibitor, a corrosion inhibitor, a viscosity index improver, a pour point lowering agent, an antifoaming agent, and an emulsifier. , Anti-emulsifier, antifungal agent, thickener and the like may be added.
本発明の潤滑油は、その他の成分として、例えば、清浄分散剤、酸化防止剤、耐荷重添加剤、さび止め剤、腐食防止剤、粘度指数向上剤、流動点降下剤、消泡剤、乳化剤、抗乳化剤、カビ防止剤、増稠剤などを添加してもよい。 (Other ingredients)
The lubricating oil of the present invention has other components such as a cleaning dispersant, an antioxidant, a load-bearing additive, a rust inhibitor, a corrosion inhibitor, a viscosity index improver, a pour point lowering agent, an antifoaming agent, and an emulsifier. , Anti-emulsifier, antifungal agent, thickener and the like may be added.
以下、図面を参照しつつ本発明に係る減速装置の実施態様を詳細に説明する。また、この実施態様は、本発明に係る減速装置を説明するために例示したにすぎず、これに限定されるものではない。
Hereinafter, embodiments of the speed reducer according to the present invention will be described in detail with reference to the drawings. Further, this embodiment is merely exemplified for the purpose of explaining the speed reducing device according to the present invention, and is not limited thereto.
〔第1の実施態様〕
図1は、第1の実施態様に係る減速装置を備える産業ロボット100の概略説明図である。
本発明の産業ロボット100は、基部1と、基部1の上に設置され、垂直軸対して旋回可能な旋回台2と、旋回台2から順に連結された第1アーム部3、第2アーム部4及び第3アーム部5と、第3アーム部5の先端に取り付けられた把持部6を有する構成である。また、旋回台2と第1アーム部3の間には第1関節部7、第1アーム部3と第2アーム部4の間には第2関節部8、第2アーム部4と第3アーム部5の間には第3関節部9、第3アーム部5と把持部6の間には第4関節部10を備え、各関節部において、アームが屈折又は回動することができる。 [First Embodiment]
FIG. 1 is a schematic explanatory view of an industrial robot 100 including a speed reducing device according to the first embodiment.
The industrial robot 100 of the present invention has a base 1, a swivel 2 which is installed on the base 1 and can swivel with respect to a vertical axis, and a first arm 3 and a second arm which are sequentially connected from the swivel 2. It has a configuration having 4 and a third arm portion 5, and a grip portion 6 attached to the tip of the third arm portion 5. Further, the first joint portion 7 is between the swivel base 2 and the first arm portion 3, the second joint portion 8 is between the first arm portion 3 and the second arm portion 4, and the second arm portions 4 and the third are located between the first arm portion 3 and the second arm portion 4. A third joint portion 9 is provided between the arm portions 5, and a fourth joint portion 10 is provided between the third arm portion 5 and the grip portion 6, and the arm can be bent or rotated at each joint portion.
図1は、第1の実施態様に係る減速装置を備える産業ロボット100の概略説明図である。
本発明の産業ロボット100は、基部1と、基部1の上に設置され、垂直軸対して旋回可能な旋回台2と、旋回台2から順に連結された第1アーム部3、第2アーム部4及び第3アーム部5と、第3アーム部5の先端に取り付けられた把持部6を有する構成である。また、旋回台2と第1アーム部3の間には第1関節部7、第1アーム部3と第2アーム部4の間には第2関節部8、第2アーム部4と第3アーム部5の間には第3関節部9、第3アーム部5と把持部6の間には第4関節部10を備え、各関節部において、アームが屈折又は回動することができる。 [First Embodiment]
FIG. 1 is a schematic explanatory view of an industrial robot 100 including a speed reducing device according to the first embodiment.
The industrial robot 100 of the present invention has a base 1, a swivel 2 which is installed on the base 1 and can swivel with respect to a vertical axis, and a first arm 3 and a second arm which are sequentially connected from the swivel 2. It has a configuration having 4 and a third arm portion 5, and a grip portion 6 attached to the tip of the third arm portion 5. Further, the first joint portion 7 is between the swivel base 2 and the first arm portion 3, the second joint portion 8 is between the first arm portion 3 and the second arm portion 4, and the second arm portions 4 and the third are located between the first arm portion 3 and the second arm portion 4. A third joint portion 9 is provided between the arm portions 5, and a fourth joint portion 10 is provided between the third arm portion 5 and the grip portion 6, and the arm can be bent or rotated at each joint portion.
図2は、本発明の第1の実施態様に係る減速装置101の概略説明図である。減速装置101は、第1アーム3の屈折動作を行う第1関節部7に設けられたものである。なお、減速装置は、図1の産業用ロボット100の各関節に適用されるものである。
FIG. 2 is a schematic explanatory view of the speed reducer 101 according to the first embodiment of the present invention. The speed reduction device 101 is provided in the first joint portion 7 that performs the refraction operation of the first arm 3. The reduction gear is applied to each joint of the industrial robot 100 shown in FIG.
図2に示すように、減速装置101は、偏心揺動型の減速装置であり、第1ケース部22と第2ケース部23により形成されたケーシングの内部に本体25を備え、ケーシングの外部には、本体25の本体軸26と同軸方向にモータ21が設置されている。本体25外面とケーシングの内面は軸受27a及び27bを介して相対回転自在に支持されており、本体25は、ケーシングの内部で本体軸26を中心に回転可能である。
As shown in FIG. 2, the speed reducer 101 is an eccentric swing type speed reducer, and includes a main body 25 inside the casing formed by the first case portion 22 and the second case portion 23, and is provided outside the casing. The motor 21 is installed in the coaxial direction with the main body shaft 26 of the main body 25. The outer surface of the main body 25 and the inner surface of the casing are supported so as to be relatively rotatable via bearings 27a and 27b, and the main body 25 is rotatable about the main body shaft 26 inside the casing.
モータ21は、モータ軸24をケーシングの内部に挿入して取り付けられている。モータ軸24の先端には、歯車28aを備えており、歯車28aは、後述するクランク軸29の一端に固定された歯車28bと噛み合うように設置される。なお、クランク軸29は、本体25の本体軸26の周囲に3か所設けられている。
The motor 21 is attached by inserting the motor shaft 24 into the casing. A gear 28a is provided at the tip of the motor shaft 24, and the gear 28a is installed so as to mesh with the gear 28b fixed to one end of the crankshaft 29, which will be described later. The crankshaft 29 is provided at three locations around the main body shaft 26 of the main body 25.
モータ軸24の歯車28aとクランク軸29の歯車28bは、ケーシングとモータ21と本体25により形成された空間に配置される。また、ケーシングとモータ21との間には、シール部33が設けられ、ケーシングと本体部25との間には、シール部32が設けられ、ケーシングの内部の空間は密閉された空間となる。この空間の内部には、金属イオンを捕捉する化合物を含む潤滑剤を充填するための潤滑剤保持部34が形成されている。
The gear 28a of the motor shaft 24 and the gear 28b of the crankshaft 29 are arranged in the space formed by the casing, the motor 21, and the main body 25. Further, a seal portion 33 is provided between the casing and the motor 21, and a seal portion 32 is provided between the casing and the main body portion 25, so that the space inside the casing is a closed space. Inside this space, a lubricant holding portion 34 for filling a lubricant containing a compound that captures metal ions is formed.
クランク軸29は、本体軸26と平行に本体25に挿入されており、本体25とクランク軸29の間には2つの軸受が設置され、クランク軸29は回転可能に取り付けられている。また、クランク軸29に設けられた偏心部の外周には、軸受を介して外歯歯車30が配置されており、外歯歯車30は、ケーシングに固定された内歯歯車31と噛み合うように設置されている。そして、内歯歯車31と外部歯車30の設置された空間は、金属イオンを捕捉する化合物を含む潤滑剤を充填するための潤滑剤保持部35が形成されている。
The crankshaft 29 is inserted into the main body 25 in parallel with the main body shaft 26, two bearings are installed between the main body 25 and the crankshaft 29, and the crankshaft 29 is rotatably attached. Further, an external gear 30 is arranged on the outer periphery of the eccentric portion provided on the crankshaft 29 via a bearing, and the external gear 30 is installed so as to mesh with the internal gear 31 fixed to the casing. Has been done. Then, in the space where the internal gear 31 and the external gear 30 are installed, a lubricant holding portion 35 for filling a lubricant containing a compound that captures metal ions is formed.
モータ21によりモータ軸24が回転すると、歯車28aと歯車28bにより、モータ21の駆動力がクランク軸29に伝達され、クランク軸29が回転する。次に、クランク軸29が回転すると、外歯歯車30と内歯歯車31が噛み合うことにより本体25が回転する。これにより、本体25に固定された第1アーム部3に対して屈折動作を起こすことができる。
When the motor shaft 24 is rotated by the motor 21, the driving force of the motor 21 is transmitted to the crankshaft 29 by the gears 28a and 28b, and the crankshaft 29 rotates. Next, when the crankshaft 29 rotates, the external gear 30 and the internal gear 31 mesh with each other to rotate the main body 25. As a result, a refraction operation can be caused with respect to the first arm portion 3 fixed to the main body 25.
本発明の減速装置101は、潤滑剤保持部34及び35には、金属イオンを捕捉する化合物を含む潤滑剤を備える。そのため、ケーシングや本体25、歯車28a及び歯車28b、クランク軸29、外歯歯車30、内歯歯車31、軸受27a、27bなどから金属イオンが生じた場合でも、金属イオンを捕捉する化合物により金属イオンの作用を低減し、潤滑油の劣化を抑制し、ひいては各金属部材の腐食を抑制することができる。その結果、シール部32やシール部33と接する金属部材の腐食が抑制されることで、潤滑剤の漏れも抑制できる。
In the speed reducer 101 of the present invention, the lubricant holding portions 34 and 35 are provided with a lubricant containing a compound that captures metal ions. Therefore, even when metal ions are generated from the casing, the main body 25, the gears 28a and 28b, the crankshaft 29, the external gear 30, the internal gear 31, the bearings 27a, 27b, etc., the metal ions are generated by the compound that captures the metal ions. It is possible to reduce the action of the above, suppress the deterioration of the lubricating oil, and suppress the corrosion of each metal member. As a result, corrosion of the metal member in contact with the seal portion 32 and the seal portion 33 is suppressed, so that leakage of the lubricant can also be suppressed.
〔第2の実施態様〕
図3は、本発明の第2の実施態様に係る減速装置102の概略説明図である。第2の実施態様の減速装置102は、直交軸型減速装置であるハイポイド減速機の例である。 [Second Embodiment]
FIG. 3 is a schematic explanatory view of the speed reducing device 102 according to the second embodiment of the present invention. The speed reducer 102 of the second embodiment is an example of a hypoid speed reducer which is an orthogonal axis type speed reducer.
図3は、本発明の第2の実施態様に係る減速装置102の概略説明図である。第2の実施態様の減速装置102は、直交軸型減速装置であるハイポイド減速機の例である。 [Second Embodiment]
FIG. 3 is a schematic explanatory view of the speed reducing device 102 according to the second embodiment of the present invention. The speed reducer 102 of the second embodiment is an example of a hypoid speed reducer which is an orthogonal axis type speed reducer.
この減速装置(ハイポイド減速機)102は、ハイポイド式の1段型減速部(直交減速部)41とモータ40を合体したものである。この減速部41は外殻体としての歯車箱42を有し、モータ40は外殻体としてのモータケーシング43を有する。モータケーシング43は、モータフレーム44と、前部カバー45及び後部カバー46とからなる。
This speed reducer (hypoid speed reducer) 102 is a combination of a hypoid type one-stage speed reduction unit (orthogonal speed reduction unit) 41 and a motor 40. The reduction gear 41 has a gear box 42 as an outer shell, and the motor 40 has a motor casing 43 as an outer shell. The motor casing 43 includes a motor frame 44, a front cover 45, and a rear cover 46.
減速部41とモータ40は、モータケーシング43の前部カバー45を歯車箱42の側面開口部にインロー嵌合した状態で、前部カバー45と歯車箱42をボルト等で結合することにより、互いに強固に一体化されている。
The speed reduction unit 41 and the motor 40 are connected to each other by connecting the front cover 45 and the gear box 42 with bolts or the like in a state where the front cover 45 of the motor casing 43 is in-row fitted to the side opening of the gear box 42. It is firmly integrated.
モータ40は、モータ軸47を、前部カバー45に嵌合した前部軸受48と後部カバー46に嵌合した後部軸受49とで回転自在に支持し、モータ軸47に回転動力を与えるように構成したものである。前部カバー45に嵌合した前部軸受48よりも前方側には、シール部50が設けられており、減速部41側から潤滑剤がモータ40側に侵入しないようになっている。
The motor 40 rotatably supports the motor shaft 47 with the front bearing 48 fitted to the front cover 45 and the rear bearing 49 fitted to the rear cover 46 so as to give rotational power to the motor shaft 47. It is configured. A seal portion 50 is provided on the front side of the front bearing 48 fitted to the front cover 45 so that the lubricant does not enter the motor 40 side from the speed reduction portion 41 side.
また、後部カバー46の背後には、モータ軸47に直結された冷却ファン51が設けられており、モータ40の外周に沿って前方へ向けて空冷のための冷却風Wを流通させるようになっている。モータケーシング43の外周には、前後方向に延びる冷却フィン52が設けられており、それら冷却フィン52に沿って冷却風Wが流れることで、モータ40は冷却される。冷却風Wは、冷却フィン52間の通路の前端開口53から減速部41側に流れる。
Further, behind the rear cover 46, a cooling fan 51 directly connected to the motor shaft 47 is provided, and the cooling air W for air cooling is circulated forward along the outer circumference of the motor 40. ing. Cooling fins 52 extending in the front-rear direction are provided on the outer periphery of the motor casing 43, and the motor 40 is cooled by the cooling air W flowing along the cooling fins 52. The cooling air W flows from the front end opening 53 of the passage between the cooling fins 52 to the speed reducing portion 41 side.
減速部41は、モータ軸47と一体になった入力軸54と、この入力軸54と直交して配置されたホローシャフト(中空軸)よりなる出力軸55と、入力軸54に形成されたハイポイドピニオン56及び出力軸55に軸装されたハイポイドギヤ57からなるハイポイドギヤセットと、出力軸55を、ハイポイドギヤ57を挟んだ軸方向両側の位置で回転自在に支持する2つの軸受58a、58bと、これら2つの軸受58a、58bを嵌合保持する歯車箱42とを備えたものである。
The reduction gear 41 includes an input shaft 54 integrated with the motor shaft 47, an output shaft 55 composed of a hollow shaft (hollow shaft) arranged orthogonal to the input shaft 54, and a hypoid formed on the input shaft 54. A hypoid gear set consisting of a hypoid gear 57 mounted on a pinion 56 and an output shaft 55, and two bearings 58a and 58b that rotatably support the output shaft 55 at positions on both sides in the axial direction sandwiching the hypoid gear 57, and these two. It is provided with a gear box 42 for fitting and holding the two bearings 58a and 58b.
歯車箱42は、出力軸55の軸方向の一面が開放された歯車箱本体59と、歯車箱本体59の開放された一面を塞いだ状態で歯車箱本体59にボルト(図示略)で着脱自在に結合された歯車箱蓋体60とから構成されおり、出力軸55を支持する2つの軸受58a、58bのうち、第1の軸受58aは歯車箱本体59に嵌合され、第2の軸受58bは歯車箱蓋体60に嵌合されている。
The gear box 42 can be attached to and detached from the gear box main body 59 in which one side of the output shaft 55 in the axial direction is open and the gear box main body 59 with a bolt (not shown) in a state where the open side of the gear box main body 59 is closed. Of the two bearings 58a and 58b that support the output shaft 55, the first bearing 58a is fitted to the gearbox body 59 and is fitted to the gearbox body 59, and is composed of the gearbox lid 60. Is fitted to the gearbox lid 60.
各軸受58a、58bの外側にはシール部62、61が設けられている。また、歯車箱本体59と歯車箱蓋体60との間にも、潤滑剤の漏れ防止のためのOリング(図示略)が設けられている。そして、モータ40は、歯車箱蓋体60を結合する面と直交する歯車箱本体59側の側面に結合されている。
Seal portions 62 and 61 are provided on the outside of the bearings 58a and 58b. Further, an O-ring (not shown) for preventing leakage of the lubricant is also provided between the gear box main body 59 and the gear box lid 60. The motor 40 is coupled to the side surface of the gearbox body 59 side orthogonal to the surface to which the gearbox lid 60 is coupled.
この減速部41においては、ハイポイドギヤ57のハイポイドピニオン56に対する噛合面が歯車箱蓋体60側に向いており、ハイポイドギヤ57の背部が歯車箱本体59側を向いている。そして、ハイポイドギヤ57の背面が、歯車箱本体59側に嵌合した第1の軸受58aの内輪によってスペーサ64を介して軸方向に受け止められている。
In this reduction gear 41, the meshing surface of the hypoid gear 57 with respect to the hypoid pinion 56 faces the gearbox lid 60 side, and the back of the hypoid gear 57 faces the gearbox body 59 side. The back surface of the hypoid gear 57 is received in the axial direction via the spacer 64 by the inner ring of the first bearing 58a fitted to the gear box main body 59 side.
ホローシャフトよりなる出力軸55は、歯車箱42を貫通しており、軸方向の一端が歯車箱本体59に形成した貫通孔より外部に露出し、他端が歯車箱蓋体60に形成した貫通孔より外部に露出している。そして、被駆動軸を一端側及び他端側のいずれの方向からも差し込み結合できるようになっている。そのために、出力軸55の中空孔内周には、全長にわたってキー溝(図示略)が設けられている。
The output shaft 55 made of a hollow shaft penetrates the gear box 42, one end in the axial direction is exposed to the outside through a through hole formed in the gear box main body 59, and the other end is a penetration formed in the gear box lid 60. It is exposed to the outside from the hole. Then, the driven shaft can be inserted and connected from either one end side or the other end side. Therefore, a key groove (not shown) is provided on the inner circumference of the hollow hole of the output shaft 55 over the entire length.
次に、歯車箱42の内部の構造について述べると、歯車箱42の内周部における少なくともハイポイドギヤ57の外周部に対応する部分(内周壁)は、ハイポイドギヤ57と同心の(ほぼ)円筒形状とされており、歯車箱42内のハイポイドギヤ57の軸方向ハイポイドピニオン56側(ハイポイドギヤ57の噛合面側)には、潤滑剤を収容するための潤滑剤保持部63が確保されている。また、ハイポイドギヤ57の背面側(噛合面と反対側)にも潤滑剤が収容されている。そして、潤滑剤保持部63に、金属イオンを捕捉する化合物を含む潤滑剤が充填・封入されている。ここで、潤滑剤保持部63は、ハイポイドギヤ57の噛合面から、歯車箱蓋体60側の軸受58bまで連続した空間であるから、十分に広い空間であり、そこには十分な量の潤滑剤が確保されている。
Next, the internal structure of the gear box 42 will be described. At least the portion (inner peripheral wall) of the inner peripheral portion of the gear box 42 corresponding to the outer peripheral portion of the hypoid gear 57 has a (almost) cylindrical shape concentric with the hypoid gear 57. A lubricant holding portion 63 for accommodating the lubricant is secured on the axial hypoid pinion 56 side (the meshing surface side of the hypoid gear 57) of the hypoid gear 57 in the gear box 42. Further, the lubricant is also contained in the back surface side (opposite side to the meshing surface) of the hypoid gear 57. Then, the lubricant holding portion 63 is filled and sealed with a lubricant containing a compound that captures metal ions. Here, since the lubricant holding portion 63 is a continuous space from the meshing surface of the hypoid gear 57 to the bearing 58b on the gear box lid 60 side, it is a sufficiently wide space, and there is a sufficient amount of lubricant. Is secured.
モータ軸47の回転は、ハイポイドピニオン56とハイポイドギヤ57の噛合により、90度方向が曲げられて出力軸55に伝達され、出力軸55から外部に取り出される。その際、歯車箱42の内部には、充分な量の潤滑剤が収容されているので、該潤滑剤の温度上昇を抑制しながら、ハイポイドギヤセットに対する良好な潤滑を行うことができる。従って、潤滑剤の劣化を防止しつつ寿命も長く維持できる。
The rotation of the motor shaft 47 is bent in the 90-degree direction by the engagement of the hypoid pinion 56 and the hypoid gear 57 and transmitted to the output shaft 55, and is taken out from the output shaft 55 to the outside. At that time, since a sufficient amount of lubricant is contained in the gear box 42, it is possible to perform good lubrication to the hypoid gear set while suppressing the temperature rise of the lubricant. Therefore, the life can be maintained for a long time while preventing the deterioration of the lubricant.
本発明の減速装置102は、潤滑剤保持部63には、金属イオンを捕捉する化合物を含む潤滑剤を備えるため、歯車箱42の内周面、出力軸55の外周面、ハイポイドピニオン56及びハイポイドギヤ57、軸受48、58a、58bなどから金属イオンが生じた場合でも、金属イオンを捕捉する化合物により金属イオンの作用を低減し、潤滑剤の劣化を抑制でき、ひいては各金属部材の腐食を抑制することができる。その結果、シール部50、61、62と接する金属部材の腐食を抑制できるため、潤滑剤の漏れを抑制できる。
In the speed reducer 102 of the present invention, since the lubricant holding portion 63 is provided with a lubricant containing a compound that captures metal ions, the inner peripheral surface of the gearbox 42, the outer peripheral surface of the output shaft 55, the hypoid pinion 56, and the hypoid gear Even when metal ions are generated from 57, bearings 48, 58a, 58b, etc., the action of the metal ions can be reduced by the compound that captures the metal ions, deterioration of the lubricant can be suppressed, and corrosion of each metal member can be suppressed. be able to. As a result, corrosion of the metal member in contact with the sealing portions 50, 61, 62 can be suppressed, so that leakage of the lubricant can be suppressed.
本発明の減速装置は、例えば、原動機の出力軸、自動車の最終減速機、産業用、鉄道車両用などのモータに利用されている。
減速装置としては、例えば、平行軸歯車減速機やヘリカル減速機などの平行軸型減速装置、ウォーム減速機やベベルギア減速機やハイポイド減速機などの直交軸型減速装置、遊星歯車減速機や波動歯車減速機やサイクロイドドライブなどの同芯軸型減速装置、ローラ減速機などのトラクションドライブ型減速装置などに利用される。 The speed reducer of the present invention is used, for example, in a motor such as an output shaft of a prime mover, a final speed reducer of an automobile, an industrial use, and a railway vehicle.
Examples of the reduction gear include parallel shaft type reduction gears such as parallel shaft gear reduction gears and helical reduction gears, orthogonal shaft type reduction gears such as worm reduction gears, bevel gear reduction gears and hypoid reduction gears, planetary gear reduction gears and wave gears. It is used for concentric shaft type reduction gears such as reduction gears and cycloid drives, and traction drive type reduction gears such as roller reduction gears.
減速装置としては、例えば、平行軸歯車減速機やヘリカル減速機などの平行軸型減速装置、ウォーム減速機やベベルギア減速機やハイポイド減速機などの直交軸型減速装置、遊星歯車減速機や波動歯車減速機やサイクロイドドライブなどの同芯軸型減速装置、ローラ減速機などのトラクションドライブ型減速装置などに利用される。 The speed reducer of the present invention is used, for example, in a motor such as an output shaft of a prime mover, a final speed reducer of an automobile, an industrial use, and a railway vehicle.
Examples of the reduction gear include parallel shaft type reduction gears such as parallel shaft gear reduction gears and helical reduction gears, orthogonal shaft type reduction gears such as worm reduction gears, bevel gear reduction gears and hypoid reduction gears, planetary gear reduction gears and wave gears. It is used for concentric shaft type reduction gears such as reduction gears and cycloid drives, and traction drive type reduction gears such as roller reduction gears.
100…産業ロボット、
1…基部、2…旋回台、3…第1アーム部、4…第2アーム部、5…第3アーム部、6…把持部、7…第1関節部、8…第2関節部、9…第3関節部、10…第4関節部
101…減速装置、
21…モータ、22…第1ケース部、23…第2ケース部、24…モータ軸、25…本体、26…本体軸、27a,27b…軸受、28a,28b…歯車、29…クランク軸、30…外歯歯車、31…内歯歯車、32,33…シール部、34,35…潤滑剤保持部
102…減速装置、
40…モータ、41…直交減速部、42…歯車箱、43…モータケーシング、44…モータフレーム、45…前部カバー、46…後部カバー、47…モータ軸、48…前部軸受、49…後部軸受、50…シール部、51…冷却ファン、52…冷却フィン、53…前端開口、54…入力軸、55…出力軸、56…ハイポイドピニオン、57…ハイポイドギヤ、58a,58b…軸受、59…歯車箱本体、60…歯車箱蓋体、61,62…シール部、63…潤滑剤保持部、64…スペーサ、W…冷却風 100 ... Industrial robot,
1 ... base, 2 ... swivel, 3 ... 1st arm, 4 ... 2nd arm, 5 ... 3rd arm, 6 ... grip, 7 ... 1st joint, 8 ... 2nd joint, 9 ... 3rd joint, 10 ... 4th joint 101 ... Speed reducer,
21 ... motor, 22 ... first case part, 23 ... second case part, 24 ... motor shaft, 25 ... main body, 26 ... main body shaft, 27a, 27b ... bearing, 28a, 28b ... gear, 29 ... crankshaft, 30 ... External gear, 31 ... Internal gear, 32, 33 ... Seal, 34, 35 ... Lubricant holding 102 ... Reducer,
40 ... motor, 41 ... orthogonal reduction unit, 42 ... gear box, 43 ... motor casing, 44 ... motor frame, 45 ... front cover, 46 ... rear cover, 47 ... motor shaft, 48 ... front bearing, 49 ... rear Bearing, 50 ... Seal part, 51 ... Cooling fan, 52 ... Cooling fin, 53 ... Front end opening, 54 ... Input shaft, 55 ... Output shaft, 56 ... Hypoid pinion, 57 ... Hypoid gear, 58a, 58b ... Bearing, 59 ... Gear Box body, 60 ... Gear box lid, 61, 62 ... Seal part, 63 ... Lubricant holding part, 64 ... Spacer, W ... Cooling air
1…基部、2…旋回台、3…第1アーム部、4…第2アーム部、5…第3アーム部、6…把持部、7…第1関節部、8…第2関節部、9…第3関節部、10…第4関節部
101…減速装置、
21…モータ、22…第1ケース部、23…第2ケース部、24…モータ軸、25…本体、26…本体軸、27a,27b…軸受、28a,28b…歯車、29…クランク軸、30…外歯歯車、31…内歯歯車、32,33…シール部、34,35…潤滑剤保持部
102…減速装置、
40…モータ、41…直交減速部、42…歯車箱、43…モータケーシング、44…モータフレーム、45…前部カバー、46…後部カバー、47…モータ軸、48…前部軸受、49…後部軸受、50…シール部、51…冷却ファン、52…冷却フィン、53…前端開口、54…入力軸、55…出力軸、56…ハイポイドピニオン、57…ハイポイドギヤ、58a,58b…軸受、59…歯車箱本体、60…歯車箱蓋体、61,62…シール部、63…潤滑剤保持部、64…スペーサ、W…冷却風 100 ... Industrial robot,
1 ... base, 2 ... swivel, 3 ... 1st arm, 4 ... 2nd arm, 5 ... 3rd arm, 6 ... grip, 7 ... 1st joint, 8 ... 2nd joint, 9 ... 3rd joint, 10 ... 4th joint 101 ... Speed reducer,
21 ... motor, 22 ... first case part, 23 ... second case part, 24 ... motor shaft, 25 ... main body, 26 ... main body shaft, 27a, 27b ... bearing, 28a, 28b ... gear, 29 ... crankshaft, 30 ... External gear, 31 ... Internal gear, 32, 33 ... Seal, 34, 35 ... Lubricant holding 102 ... Reducer,
40 ... motor, 41 ... orthogonal reduction unit, 42 ... gear box, 43 ... motor casing, 44 ... motor frame, 45 ... front cover, 46 ... rear cover, 47 ... motor shaft, 48 ... front bearing, 49 ... rear Bearing, 50 ... Seal part, 51 ... Cooling fan, 52 ... Cooling fin, 53 ... Front end opening, 54 ... Input shaft, 55 ... Output shaft, 56 ... Hypoid pinion, 57 ... Hypoid gear, 58a, 58b ... Bearing, 59 ... Gear Box body, 60 ... Gear box lid, 61, 62 ... Seal part, 63 ... Lubricant holding part, 64 ... Spacer, W ... Cooling air
Claims (5)
- 潤滑剤が封入された減速装置であって、
減速装置は、潤滑剤と接する部分に金属から構成される金属部材を有し、
潤滑剤は、金属部材から生じた金属イオンを捕捉する物質を含むことを特徴とする、減速装置。 It is a speed reducer with a lubricant sealed in it.
The speed reducer has a metal member made of metal at a portion in contact with the lubricant.
A speed reducer, wherein the lubricant contains a substance that captures metal ions generated from a metal member. - 潤滑剤が封入された減速装置の腐食抑制方法であって、
潤滑剤に、金属部材から生じた金属イオンを捕捉する物質を添加するステップと、
減速装置の金属から構成される金属部材に対して、金属イオンを捕捉する物質を含む潤滑剤を接触させるステップと、
を備えることを特徴とする、減速装置の腐食抑制方法。 It is a method of suppressing corrosion of a speed reducer filled with a lubricant.
The step of adding a substance that captures metal ions generated from metal members to the lubricant,
A step of bringing a lubricant containing a substance that captures metal ions into contact with a metal member made of metal in a speed reducer,
A method for suppressing corrosion of a speed reducer, which comprises. - 潤滑剤であって、
潤滑油、及び、金属イオンを捕捉する物質を含むことを特徴とする、潤滑剤。 It ’s a lubricant,
A lubricant characterized by containing a lubricating oil and a substance that traps metal ions. - 潤滑剤の製造方法であって
潤滑油に金属イオンを捕捉する物質を添加するステップを備えることを特徴とする、潤滑剤の製造方法。 A method for producing a lubricant, which comprises a step of adding a substance that traps metal ions to the lubricating oil. - 潤滑剤に添加する添加剤であって、
前記添加剤は、金属イオンを捕捉する物質であることを特徴とする、添加剤。
It is an additive added to the lubricant and
The additive is an additive, which is a substance that traps metal ions.
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Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS633098A (en) * | 1986-06-24 | 1988-01-08 | Ajinomoto Co Inc | Lubricant |
JPH0586392A (en) * | 1991-09-26 | 1993-04-06 | Kyodo Yushi Kk | Lithium grease composition |
JP2003113908A (en) * | 2001-10-05 | 2003-04-18 | Sumitomo Heavy Ind Ltd | Orthogonal reduction gear |
JP2006291210A (en) * | 2005-04-13 | 2006-10-26 | Chevron Oronite Co Llc | Method of manufacturing mannich condensate useful as sequestrant |
WO2007145305A1 (en) * | 2006-06-15 | 2007-12-21 | Nidec Corporation | Method of preventing lubricant from deteriorating, lubricant, and dynamic-pressure bearing device |
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JP2002194373A (en) * | 2000-12-26 | 2002-07-10 | Nsk Ltd | Electroconductive grease |
AU2003234139B2 (en) * | 2002-04-19 | 2008-11-13 | The Lubrizol Corporation | Methods and lubricant and fuel compositions for two-stroke engine containing power valves |
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Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS633098A (en) * | 1986-06-24 | 1988-01-08 | Ajinomoto Co Inc | Lubricant |
JPH0586392A (en) * | 1991-09-26 | 1993-04-06 | Kyodo Yushi Kk | Lithium grease composition |
JP2003113908A (en) * | 2001-10-05 | 2003-04-18 | Sumitomo Heavy Ind Ltd | Orthogonal reduction gear |
JP2006291210A (en) * | 2005-04-13 | 2006-10-26 | Chevron Oronite Co Llc | Method of manufacturing mannich condensate useful as sequestrant |
WO2007145305A1 (en) * | 2006-06-15 | 2007-12-21 | Nidec Corporation | Method of preventing lubricant from deteriorating, lubricant, and dynamic-pressure bearing device |
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