JP2006188691A - Lubricant supplying member - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lubricant supplying member free from adverse effect on the environment. <P>SOLUTION: The lubricant supplying member is provided with a polymer containing a biodegradable lubricant and designed to supply the biodegradable lubricant from the polymer to the lubricating object requiring lubrication. The polymer is a polyolefin-based synthetic resin such as polyethylene, polypropylene and polymethylpentene. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a member for supplying a lubricant, and in particular, is used to provide a lubricant between these members placed between a plurality of members that are in a rolling or sliding relationship with each other. The present invention relates to a lubricant supplier.

  Conventionally, as this type of supplier, for example, what is described in a microfilm (hereinafter referred to as “first conventional example”) of Japanese Utility Model Application No. 5-33341 (Japanese Utility Model Publication No. 7-4952), There is one described in Japanese Laid-Open Patent Publication No. 6-346919 (hereinafter referred to as “second conventional example”).

  The first conventional example has a configuration in which a lubricant-containing polymer member is attached to the end portion of a ball screw nut so as to be slidably contactable with a thread groove of a screw shaft, and also serves as a seal member. The lubricant that gradually oozes out from the polymer is automatically supplied to the ball after passing through the thread groove so that the lubricating action of the ball screw can be exerted over a long period of time.

In the second conventional example, a seal member such as a side seal attached to the slider of the linear guide device is formed of rubber or synthetic resin containing a lubricant. Then, the contained lubricant is gradually exuded with time into the rolling element rolling groove surface on the side surface of the guide rail with which the seal lip portion comes into contact, and is automatically supplied to the rolling element. As a result, the lubricant-containing member according to the second conventional example can also exert a lubricating action over a long period of time.
A microfilm of Japanese Utility Model Application No. 5-33341 (Japanese Utility Model Application Publication No. 7-4952) JP-A-6-346919

  However, this type of conventional lubricant supplier has the following problems. When the lubricant supplier is used in construction machinery, agricultural machinery, harbor equipment machinery, wastewater treatment equipment, etc., the lubricant supplier can supply water resources such as landslides, rivers, and seas where these machinery are used. There is a possibility that the lubricant that exudes is mixed. If an attempt is made to realize a configuration in which the lubricant supply system is completely free from leakage of the lubricant, the structure of the seal mechanism for the lubricant becomes complicated and difficult to realize. On the other hand, leaving the lubricant leaking to the environment as it is may cause environmental pollution.

  Therefore, an object of the present invention is to provide a novel lubricant supplier effective for preventing environmental pollution.

  In order to achieve this object, the present invention provides a lubricant supply body comprising a polymer containing a biodegradable lubricant, and a member to be lubricated in need of lubrication from the polymer to the biodegradable lubrication. It is configured to supply an agent.

  In the present invention, “biodegradable” means that the lubricant is decomposed by the force of the environment itself when placed in an environment such as soil. Some of these types of “biodegradability” may be decomposed by the action of microorganisms in water such as soil, rivers, lakes, and the sea. The lubricant of the present invention includes both grease lubrication and oil lubrication.

  Furthermore, the member to be lubricated in the present invention is two members that are in rolling contact or sliding contact with each other as shown in the examples described later, and specifically, is a side seal device of a linear guide or the like.

  In another aspect of the present invention, there is provided a lubrication system, a lubrication method, and a linear guide, which are provided with the lubricant supply body and configured to supply the lubricant from the lubricant supply body to a place where lubrication is required. Rolling members such as ball screws and rolling bearings.

  According to the present invention, since the lubricant contained in the lubricant supply body is biodegradable, even if the lubricant is mixed in soil or water resources, it is decomposed by microorganisms and can prevent environmental pollution. It becomes possible. Therefore, the lubricant supply body according to the present invention can be applied to a lubricated member used in construction machines, agricultural machines, harbor equipment machines, wastewater treatment facilities, and the like.

  Next, an embodiment of the present invention will be described. The lubricant content of the lubricant supply member of the present invention is 30 to 90% by weight. If the content is less than this, there is a possibility that lubrication to the lubricated member cannot be expected sufficiently, and if the content exceeds the upper limit, the relative amount of the polymer with respect to the lubricant is reduced, and as a lubricant supply member, that is, as a molded product. The mechanical strength characteristics may be reduced. Considering the amount of lubricant supplied to the member to be lubricated and the mechanical strength of the lubricating member, the more preferable content of the lubricant is 40 to 80% by weight.

Next, the composition of the lubricant supply body of the present invention will be described. The lubricant for forming the lubricant supply body is required to have high biodegradability both in the case of grease lubrication and in the case of oil lubrication. The following are examples of oil lubricants. Fatty acid diesters and polyol esters are preferred. Specific examples of the fatty acid diester include diisodecyl adipate, diisodecyl azelate, dioctyl sebacate, and the like. Specific examples of the polyol ester include neopentyl glycol diester (carbon chain: n-C ₉ , br-C ₉ , oleyl, etc.), trimethylolpropane triester (carbon chain: n-C ₆ , n-C _7). , br-C _8, isostearyl, oleyl, etc.), pentaerythritol tetra esters (carbon _{chain: n-C 6, n-} C 8, br-C 8, isostearyl, oleyl, etc.), dipentaerythritol hexa esters (carbon chain: a n-C _6, etc.) and the like.

In addition to the above esters, fatty oils rapeseed, castor oil, etc. are liquid at room temperature (glycerol esters of fatty acids) or fatty acid triglyceride structure similar to the structure thereof (carbon _{chain: n-C 8, n-} C 12, oleyl Etc.) can also be used.

  In the case of grease lubrication, it is as follows. Grease with the above esters as base oil and thickeners such as lithium soap, hydroxylilithium soap, calcium soap, hydroxylithium soap, (calcium + lithium) soap, composite lithium soap, and organic bentonite can be used. is there.

  The above-mentioned lubricant may be added with an antioxidant, a rust inhibitor, and an anti-wear agent, but the additive does not contain Zn or other heavy metals and does not interfere with the biodegradability of the lubricant. Is good.

  It is preferable that the lubricant has high biodegradability. Specifically, the biodegradability according to the biodegradability test of CECL-33-T-82 is 80% or more, preferably 90% or more. It is suitable for so-called “environmentally friendly”. Here, “CEC” is an abbreviation for the Co-ordinating European Council. L-33-T-82 is a biodegradability test method for a two-stroke cycle outboard motor oil at the European Standards Advisory Committee. It can also be applied to water-insoluble samples such as hydraulic oil and grease. Specifically, the sample is shaken and cultured with a microorganism source at 25 ° C. for 21 days, the carbon tetrachloride extract is subjected to infrared spectroscopic analysis, and the biodegradation rate (%) is calculated from the amount of residual oil.

  As the heat resistance desired for the lubricant of the present invention, in the case of grease, the oxidation stability (99 degrees Celsius, 100 hours) is 50 kPa or less, preferably 30 kPa or less. When the base oil is pentaerythritol tetraester, the thickener is a grease of lithium complex soap and is about 25 kPa.

  The oxidation stability test is defined in JIS K2220 5.8. The sample was heated to 99 degrees Celsius in a cylinder with an oxygen pressure of 0.76 MPa, the pressure drop was recorded at regular intervals, and the oxygen pressure after 100 hours. This is done by measuring the decrease in.

  In the case of lubricating oil, the increase amount of the total acid value is preferably 80 mgKOH / g or less, more preferably 30 mgKOH / g or less, in the oxidation stability test of the lubricating oil specified by JIS K2514. As the base oil of the lubricating oil or grease, those based on pentaerythritol tetraester have a total acid value of 15 to 20 mg KOH / g in JISK 2514, and are preferable.

  The lubricant of the present invention is biodegradable and is required to be contained in the polymer and smoothly ooze from the polymer toward the member to be lubricated, while the polymer can sufficiently contain this lubricant. In addition, it is required that it can be smoothly discharged to a place where lubrication is required. The present inventor has examined a suitable combination of a biodegradable lubricant and a polymer. As a result, pentaerythritol tetraester excellent in heat resistance and a highly polar resin, particularly polyurea elastomer, polyurethane and polyester described later. It came to the knowledge that the combination with at least 1 type or more of a system elastomer was a preferable thing. Therefore, a lubricant supply member made of a combination of these is preferable because it can use a highly biodegradable lubricant while improving the lubrication performance for the member to be lubricated.

  As the synthetic resin of the lubricant-containing polymer forming the lubricant supply body of the present invention, polyolefin synthetic resins such as polyethylene, polypropylene and polymethylpentene, polyester elastomer, polyurea elastomer, polyester elastomer, polyurethane, etc. are used. can do.

  In the case of polyurethane, the grease is used as a lubricant, which is a reaction raw material. The urethane prepolymer containing an isocyanate group and an amine-based curing agent are mixed evenly with either or both of the grease, and then the two mixtures. Are further mixed and filled in the bearing, and if necessary, heated to react and harden in a state containing grease.

  In the case of a polyurea elastomer, an amine component composed of a mixture of an aromatic polyamine compound containing a soft segment in the molecular chain and an aromatic diamine is mixed with a lubricating oil compatible with the same or a grease based on the lubricating oil. Further, a polyisocyanate component is added to the mixture thus mixed, filled in a mold having a desired shape, heated and reacted as necessary, and cured in a state containing a lubricant.

（式中，Ａはソフトセグメントであり、平均分子量で２００以上のポリアルキレンエーテル） The polyurea elastomer will be described in more detail. The polyurea elastomer comprises (1) a polyisocyanate component and (2)

(In the formula, A is a soft segment, and polyalkylene ether having an average molecular weight of 200 or more)

  It is obtained by reacting an aromatic polyamine compound containing a soft segment in the molecular chain represented by an amine component composed of a mixture of an aromatic diamine (NCOindex is in the range of 0.9 to 1.2), Lubricant is contained if a lubricant (lubricating oil compatible with the amine component or grease based on the lubricating oil, specifically biodegradable lubricant as explained) is mixed during the reaction. It can be cured in the state.

  Moreover, in order to improve the mechanical strength of the lubricant-containing member containing a lubricant, a filler may be added to the lubricant-containing member. For example, inorganic whiskers such as calcium carbonate, magnesium carbonate, potassium titanate whisker and aluminum borate whisker, or inorganic fibers such as glass fiber and metal fiber, and braided fabrics such as carbon black for organic compounds. Graphite powder, carbon fiber, aramid fiber, polyester fiber, etc. may be added.

  1 to 3 show a case where the lubricant supply member of the present invention is incorporated in a side seal of a linear guide device. As shown in the perspective view of FIG. 1, the linear guide device includes a guide rail 1 that has rolling element rolling grooves 3 and 3 ′ on the outer surface and extends in the axial direction, and a slider that is assembled across the guide rail 1. 2 are provided. The slider 2 has a slider body 2A and rolling element rolling grooves (not shown) facing the rolling element rolling grooves 3 and 3 'of the guide rail 1 on the side surfaces of both ends 4 thereof, and the thick portion of the sleeve portion is pivoted. It has an unillustrated rolling element return path that penetrates in the direction.

  On the other hand, the end cap 28 has a curved path (not shown) that connects the rolling element rolling groove of the slider body 2A and the rolling element return path parallel to the rolling element rolling groove, and the rolling element rolling groove and the rolling element return. A rolling circuit circulation circuit is formed by the path and the curved path at both ends.

  A large number of rolling elements made of steel balls, for example, are loaded in the circulation circuit of the rolling elements. The slider 2 incorporated in the guide rail 1 moves smoothly along the guide rail through the rolling of the rolling elements in the opposing rolling element rolling grooves. During the movement, the rolling element moves in the slider. It is designed to circulate infinitely through the moving body circulation path. Side seals 10 are attached to the end faces of the end caps 2 </ b> B at the front and rear ends of the slider 2 to seal the opening of the gap with the guide rail 1.

  Then, as shown in the exploded perspective view of FIG. 2, a lubricant-containing polymer member 11 as a lubricant supply member is assembled in a narrow manner between the side seal 10 and the reinforcing plate 20. Reference numeral 7 denotes a grease nipple for supplying grease to the rolling elements inside the slider 2 as required.

  The side seal 10 is composed of a substantially U-shaped steel plate matching the outer shape of the end cap 2B, and nitrile rubber having a shape similar to that of the steel plate and integrally formed on the outer surface thereof. The seal lip portion L in contact with the guide rail 1 is formed on the upper surface 1a and the outer surface 1b of the guide rail 1 in accordance with the cross-sectional shape of the guide rail 1 so that the gap between the slider 2 and the guide rail 1 can be sealed. It is formed into a shape that can be slidably contacted, more specifically, a shape that can also be slidably contacted with the rolling element rolling grooves 3 and 3 ′. Further, through-holes 10a and 10b for attaching screws are formed in both sleeve portions of the side seal 10, and a through-hole 10c for grease nipple is formed in a connecting portion connecting the both sleeve portions. Yes.

  The lubricant-containing polymer member 11 made of a molded product of the lubricant-containing polymer is made of, for example, a polyurethane which is a reaction product of a urethane prepolymer containing an isocyanate group and an amine curing agent with pentaerythritol tetraester as a lubricant. Hardened with 45% by weight of biodegradable grease (biodegradation rate: 98% in the biodegradability test of CECL33-T-82) with base oil and lithium complex as thickener It is. Before curing, use a grease-like raw material that is a mixture of a liquid urethane prepolymer and a grease mixed with an amine-based curing agent, which is then poured into a predetermined mold and heated, pressurized, etc. as necessary. And formed into the desired shape. As shown in the enlarged perspective view of FIG. 3, the shape is a substantially U-shape matching the outer shape of the end cap 28 and has a predetermined thickness. The shape of the inner surface matches the outer shape of the cross section of the guide rail 1 and is formed in a shape along the upper surface 1a and the side image 1b of the guide rail 1, and the rolling element rolling groove on the guide rail 1 is formed. The protrusions 13a and 13b corresponding to the rolling element rolling grooves 3 below the protrusions 12a and 12b corresponding to 3 are respectively formed and matched to the cross-sectional outer shape of the guide rail 1.

  Further, both sleeve portions of the lubricant-containing polymer member 11 are formed with through-holes 11a and 11b in which a part for passing through the mounting screw to the end cap 28 of the slider is cut in the axial direction. A through hole 11c in which a portion for a grease nipple is cut off in the axial direction is formed in the connecting portion that connects the sleeves.

  Then, as shown in FIG. 2, ring-shaped sleeve members 11A, 11B, and 11C are fitted in the through holes 11a, 11b, and 11c, respectively. The ring-shaped sleeve members 11A, 11B and 11C are short cylindrical members having a length slightly longer than the thickness of the lubricant-containing polymer member 11, and the outer diameter thereof is easily formed in the through holes 11a, 11b and 11c. The size is such that it can be fitted, so that the contained lubricant is not squeezed out by being tightened with screws when the lubricant-containing polymer member 11 is mounted.

  The outer diameters of the ring-shaped sleeve members 11A, 11B, and 11C are larger than the outer diameters of the through holes 11a, 11b, and 11c. When the sleeve diameter is increased in this way, the inner surface of the lubricant-containing polymer member 11 can be constantly pressed against and closely adhered to the outer surface of the guide rail 1, and the lubricant that exudes can be supplied stably.

  The reinforcing plate 20 is a substantially U-shaped steel plate or a synthetic resin plate that matches the outer shape of the end cap 28, and through holes 22a and 22b for penetrating the mounting screws 21a and 21b are formed on both sleeves. At the same time, a through hole 22c for the grease nipple 7 is formed at the connecting portion that connects these sleeve portions. The reinforcing plate 20 is not in contact with the guide rail 1.

  The lubricant-containing polymer member 11 is usually assembled so as to overlap the side seal 10 and the reinforcing plate 20 and narrow in a sandwich shape. However, since the lubricant-containing polymer member 11 is in close contact with the outer surface of the guide rail and can also perform the same sealing function as the side seal 10, the reinforcing plate 20 may be used instead of the side seal 10 in some cases. Alternatively, the reinforcing plate 20 may be mounted only on the surface of the lubricant-containing polymer member 11 and the back surface may be directly applied to the end surface of the end cap 28.

  In this embodiment, the three members of the side seal 10, the lubricant-containing polymer member 11, and the reinforcing plate 20 connect the mounting screws 21 a and 21 b to the through holes 10 a and 10 b of the side seal 10 and the lubricant-containing polymer member 11. The sleeve members 11A and 11B, the through holes 20a and 20b of the reinforcing plate 20 and the screw through holes of the end cap 28 are screwed into the mounting screw holes of the slider main body 2A, so that the main body is overlapped with the end cap 28. Fixed to 2A.

  In this linear guide device, grease may be filled in the slider 2, and in this case, the same biodegradable grease as that contained in the lubricant-containing polymer member 11 is used.

  FIG. 4 shows a second embodiment, in which the lubricant supply member of the present invention is incorporated for supplying the lubricant to the seal lip portion of the oil seal device. In other words, the oil seal device 33 is attached to the end of the rotary shaft 31 supported by the bearing 30 via the housing 32. The rubber seal lip 33a on the inner peripheral surface of the oil seal device 33 is in sliding contact with the outer peripheral surface of the rotary shaft 31 to perform a sealing function. To maintain the sealing performance and life, the rotary shaft 31 and the seal lip are maintained. It is necessary to continuously supply the lubricant to the sliding contact portion with 33a. For this purpose, a lubricant-containing polymer member 41 as a lubricant supply member is attached to the front end portion of the housing 32 adjacent to the oil seal device 33 and fixed with screws 34.

  In this case, the lubricant-containing polymer member 41 is composed of, for example, polyurethane, which is a reaction product of an isocyanate group-containing urethane prepolymer and an amine-based curing agent, pentaerythritol tetraester as a lubricant, and hydroxylithium soap. A biodegradable grease (biodegradability: CECL-33-T-82 biodegradability test, 99%) containing 45 wt.% Of a thickener. Before curing, use a grease-like raw material that is a mixture of a liquid urethane prepolymer and grease mixed with an amine-based curing agent, which is then poured into a predetermined mold and heated or pressurized as necessary. And molded into the desired shape. The shape is a thick annular shape, and the inner peripheral surface thereof is a sliding contact surface with the rotating shaft 31.

  When the rotating shaft 31 rotates, the lubricant-containing polymer member 41 at the end slides while being in contact with the rotating shaft 31, and the influence of frictional heat of the sliding is also added. The lubricant contained in 41 tissues gradually oozes out over time. The lubricant that has oozed out is supplied to the oil seal device 33 through the rotating shaft 31, and spreads uniformly over the seal lip 33a to perform a stable seal over a long period of time.

  The lubricant-containing polymer member 41 also functions as a seal member that seals the end portion of the rolling bearing 30 to block the inside of the housing 32 together with the oil seal device 33 from the outside atmosphere. As a result, even when the external atmosphere is in a bad environment such as water or dust, the inside of the rolling bearing 30 is protected against such water or dust, and a smooth lubricating action can be maintained for a long time.

  5 and 6 show a third embodiment, in which a lubricant supply member 50 of the present invention is mounted on a nut end face as a seal and lubricant supply member of a ball screw device. Its shape is a semi-ring shape with a slightly longer axial length, and the inner peripheral surface has a shape substantially the same as the outer diameter of the screw shaft 51, and becomes a pair of members by combining two rings. . An annular peripheral groove 54 into which the garter spring 53 is fitted is formed in the outer peripheral image of the lubricant supply member 50. Further, a cylindrical reinforcing member 55 is fitted at a position where it does not interfere with the circumferential groove 54.

  The lubricant supply member 50 opens the slit 52, expands the ring, and fits the screw shaft 51. Then, the lubricant supply member 50 is fitted into the concave portion 57 on the end face of the ball screw nut 56, and is screwed from the side of the nut. The tip is fixed by engaging with the reinforcing member 55. The lubricant supply member 50 expanded and attached by the cut 52 is elastically tightened by the garter spring 53, so that the fitting clearance between the outer diameter portion of the screw shaft 51 and the inner peripheral portion of the lubricant supply member 50 is increased. Kept below zero. The spiral screw groove 21a provided on the outer peripheral surface of the screw shaft 51, the spiral screw groove 56a provided on the inner peripheral surface of the ball screw nut 56, and a plurality of balls 58 loaded between the grooves. The lubricant that gradually oozes out from the lubricant supply member 50 is automatically supplied to the contact surface, and the increase in frictional resistance is suppressed, and the lubricant also contributes to the lubrication of the ball screw itself. This ball screw may be filled with grease inside the ball screw nut 56, in which case biodegradable grease is used. Further, since there is the reinforcing member 55, the force applied from the mounting screw 58 is not directly applied to the lubricant supply member 50, so the lubricant supply member 50 made of a soft lubricant supply polymer containing a large amount of lubricant is used. Is possible.

  The lubricant-containing polymer member 50 made of a molded product of the lubricant-containing polymer is, for example, a porous material obtained by powder-forming ultra-high molecular weight polyethylene in a predetermined mold, and a biodegradable lubricating oil as a lubricant. The pentaerythritol tetraester (biodegradation rate: 99% in the biodegradability test of CECL-33-T-82) was vacuum impregnated to contain 50 weight percent. The lubricant supply member 50 is covered with a polyacetal outer shell member 57 serving as a cover and a seal, and a portion corresponding to the screw shaft 51 is a labyrinth seal having a slight gap.

  Next, a fourth embodiment will be described with reference to FIG. A lubricant-containing polymer was used as a lubricant supply member to fill the inner spaces of the inner ring and the outer ring of the bearing. For example, a lubricant-containing polymer may be a polyurea elastomer, which is a reaction product of an amine component composed of an aromatic polyamine compound having a soft segment in a molecular chain and an aromatic diamine compound, and a polyisocyanate component, and pentaerythritol tetra-tetrahydrofuran as a lubricant. In a state in which 60% by weight of a biodegradable grease containing an ester as a base oil and a lithium complex as a thickener (biodegradation rate: 98% in the biodegradability test of CECL-33-T-82) is contained. It has been cured.

  The bearing was filled as follows. After mixing the liquid amine component and polyisocyanate component with the grease, and then injecting the grease-like raw material into the bearing space, heat, pressurize, etc. as necessary. Cured.

  As shown in FIG. 7, the rolling bearing 71 filled with the lubricant-containing polymer according to the present embodiment has a plurality of tapered rollers 74 which are rolling idles interposed between the inner transportation 72 and the outer transportation 73. And a tapered roller bearing provided with a cage 75 that holds the rolling elements 74. A lubricant-containing polymer that covers the cage is filled and solidified (cured) in a space formed by the internal transport 72, the external transport 73, the tapered roller 74, and the cage 75 of the tapered roller bearing.

  Next, the manufacturing method of the lubricant containing polymer filling rolling bearing 71 concerning a present Example is demonstrated. A jig for this purpose is composed of a lower jig 81 and an upper jig 82 as shown in FIGS. The lower jig 81 is formed with a concave portion 91 into which the wider side of the inner ring 72 is fitted, and a portion 92 facing the end image 13A on the narrow side of the outer transport 73 is formed on the outer peripheral portion. ing. In addition, a recess 93 that accommodates the tapered roller 74 and the retainer 75 is formed between the recess 91 and the jaw 92. The lower jig 81 is configured such that when the tapered roller bearing is placed, the wider end surface 12A of the inner ring 72 is in contact with the bottom surface of the recess 91, and between the end surface 13A of the outer ring 73 and the upper surface of the jaw 92. In this structure, a gap 77 is formed.

  The upper jig 82 is formed with a recess 101 into which the narrow side of the inner ring 73 is fitted, and a contact portion 102 that is in contact with the end face 13B on the wider side of the outer ring 73 is formed on the outer peripheral part. Further, a recess 103 for accommodating the tapered roller 74 and the cage 75 is formed between the recess 101 and the contact portion 102. When the upper jig 82 is placed on a tapered roller bearing, the outer end 73 having a wider width comes into contact with the contact portion 102, and between the end surface 12B of the inner ring 72 and the recess 101, In addition, a gap 78 is formed between the cage 75 and the recess 103.

  In order to manufacture the lubricant-containing polymer-filled rolling bearing 71, first, a tapered roller bearing is assembled by a normal method, and then normal degreasing cleaning is performed. Thereafter, a release agent or biodegradable grease is applied to the outer peripheral surface of the inner transportation 72, the outer peripheral surface of the outer ring, the surface of the tapered roller 74, and the surface of the cage, and a coating film of the release agent or biodegradable grease ( Film). The release agent coating film can be applied, for example, by spraying or brushing on each of the above-mentioned parts, with the fluorine-based release agent as it is or diluted with an appropriate diluent (eg, water, isooctane, HCFC-141b, etc.). Alternatively, it is performed by a method such as immersing a tapered roller bearing in a solvent or dispersion containing the release agent. At this time, the application amount of the release agent is not particularly limited, but it is preferable that the release agent is uniformly applied so as to have a film thickness of about 0.1 to 1.0 μm.

  The method for forming the biodegradable grease film (coating film) is not particularly limited. For example, after a small amount of biodegradable grease is filled in the bearing, the bearing is rotated to rotate the inner peripheral surface of the outer ring. There is a method of forming a grease film on the outer peripheral surface of the inner ring, the surface of the tapered roller 74 and the surface of the cage. As another method, the biodegradable grease is dissolved in a solvent in which the base oil dissolves and the thickener is uniformly dispersed, and is then immersed in the solution, followed by drying and the solvent. A film can also be formed by removing. The film thickness of the biodegradable grease film is preferably 10 to 1000 μm.

  Next, a fifth embodiment of the present invention will be described. This embodiment relates to a deep groove ball bearing shown in FIG. 10, and this bearing has a plurality of rolling elements held by a retainer 113 between an outer ring 111, an inner ring 112, and an outer ring and an inner ring. 114. Further, the corners 111a and 112a on the inner peripheral surface of the outer ring 111 and the outer peripheral surface of the inner ring 112 are rounded.

  The space formed by the outer ring 111, the inner ring 112, and the rolling elements 114 is filled with a lubricant-containing polymer 115. The side end surface 115a of the lubricant-containing polymer is the side end surface 111b of the outer ring 111 and the inner ring 112. The lubricant-containing polymer 115 is filled so as to be recessed inside by 112b.

  As the lubricant-containing polymer, the following is used. For example, a biodegradable grease (raw raw material) containing polyurethane, which is a reaction product of an isocyanate group-containing urethane prepolymer and an amine curing agent, with pentaerythritol tetraester as a base oil and a lithium complex as a thickener. Degradation rate: CECL-33-T82 biodegradability test, 98%) was cured in a state of containing 45 weight percent. Before curing, use a grease-like raw material in which a mixture of liquid urethane prepolymer and amine-based curing agent is further mixed and injected into the bearing space. Cured inside.

  Next, a sixth embodiment of the present invention will be described based on the self-aligning roller bearing shown in FIG. A plurality of spherical rollers 120, 120 are respectively placed between the inner ring raceways 122b, 122b of the double row provided on the outer peripheral surface of the inner ring 122 and the outer ring raceway 124b provided on the inner peripheral surface of the outer ring 125, respectively. In a state where it can be freely rolled by 127c, it is provided in multiple rows. A lubricant-containing polymer 121a is filled in the annular space between the inner ring raceways 122b and 122b and the outer ring raceway 124b. The cage 127c is embedded in the lubricant-containing polymer 121a in a state in which the lubricant-containing polymer 121a is filled, and is not exposed to the outside.

  In order to manufacture a roller bearing filled with a lubricant-containing polymer, first, uncured lubrication is provided in an annular space provided with the plurality of spherical rollers 120, 120 between the inner ring raceways 122b, 122b and the outer ring raceway 124b. After filling the agent-containing polymer, the lubricant-containing polymer is cured. The lubricant-containing polymer used here is the same as that used in the embodiment shown in FIG.

1 is an overall perspective view of a linear guide device to which a lubricant supply body according to the present invention is applied. The exploded perspective view of the side seal part. The whole lubricant supply body applied to a side seal part is a perspective view. Sectional drawing of the seal lip | rip part of the oil seal apparatus with which the lubricant supply body concerning this invention was applied. The partial cross section side view of the lubricant supply body concerning this invention applied to a ball screw apparatus. Sectional drawing of the ball screw device. Sectional drawing of the tapered roller bearing to which the lubricant supply body concerning this invention was applied. Sectional drawing of both including this tapered roller bearing and the jig for manufacture. FIG. 9 is a detailed sectional view of a part of FIG. 8. Sectional drawing of the deep groove ball bearing to which the lubricant supply body concerning this invention was applied. Sectional drawing of the self-aligning roller bearing to which the lubricant supply body concerning this invention was applied.

Explanation of symbols

Guide rail: 1
Slider: 2
Lubricant supplier (lubricant-containing polymer): 11, 41, 50, 76, 115, 121a

Claims (6)

A lubricant supply body comprising a polymer containing a biodegradable lubricant and configured to supply the biodegradable lubricant from the polymer to a lubricated member requiring lubrication. Because
The polymer synthetic resin is a polyolefin-based synthetic resin such as polyethylene, polypropylene, and polymethylpentene,
Lubricant supply agent. A polymer comprising a biodegradable lubricant and a synthetic resin is provided, and the biodegradable lubricant is supplied from the polymer to a member to be lubricated in need of lubrication. A lubricant supply body,
The lubricant is pentaerythritol tetraester;
The synthetic resin is at least one selected from the group consisting of a polyurea elastomer, polyurethane, and polyester elastomer,
Lubricant supply agent. A linear guide device comprising the lubricant supply body according to claim 1. An oil seal device comprising the lubricant supply body according to claim 1. A ball screw device comprising the lubricant supply body according to claim 1. A bearing device comprising the lubricant supply body according to claim 1.

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