WO2023195055A1 - Structure de support d'élément coulissant - Google Patents

Structure de support d'élément coulissant Download PDF

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Publication number
WO2023195055A1
WO2023195055A1 PCT/JP2022/017068 JP2022017068W WO2023195055A1 WO 2023195055 A1 WO2023195055 A1 WO 2023195055A1 JP 2022017068 W JP2022017068 W JP 2022017068W WO 2023195055 A1 WO2023195055 A1 WO 2023195055A1
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WO
WIPO (PCT)
Prior art keywords
thrust
support structure
sliding member
sheet
thrust sheet
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PCT/JP2022/017068
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English (en)
Japanese (ja)
Inventor
宏泰 猪飼
Original Assignee
株式会社エムアイエス
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Priority to PCT/JP2022/017068 priority Critical patent/WO2023195055A1/fr
Publication of WO2023195055A1 publication Critical patent/WO2023195055A1/fr

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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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C17/00—Sliding-contact bearings for exclusively rotary movement
    • F16C17/04—Sliding-contact bearings for exclusively rotary movement for axial load only
    • 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
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/02—Sealings between relatively-stationary surfaces
    • F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
    • F16J15/10—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing
    • 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
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L19/00—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts
    • F16L19/02—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member
    • F16L19/0212—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member using specially adapted sealing means

Definitions

  • the present invention relates to a support structure for a sliding member, and more particularly, to a support structure for a sliding member that receives a thrust load of the sliding member on a receiving surface of the member.
  • Patent Document 1 discloses a support structure in which a thrust bearing is interposed between an end of a coil spring and a receiving member (upper case). In this support structure, the thrust bearing effectively reduces the sliding resistance of the receiving surface of the receiving member due to the vertical movement of the coil spring.
  • Patent Document 1 since the spring support structure of Patent Document 1 uses a thrust bearing, it is strictly prohibited to allow water or dust to enter the case, and it is also prone to floating rust due to contact between dissimilar metals, resulting in poor weather resistance. low. In addition, maintenance is low because periodic overhaul work is required. Furthermore, production costs are high because a thrust bearing is required and a case dedicated to the thrust bearing is required.
  • a technique has been proposed in which a resin sheet or a metal plate is interposed between the end of the coil spring and the receiving member.
  • the proposed technology cannot sufficiently reduce the sliding resistance of the receiving surface of the receiving member compared to a thrust bearing.
  • the resin sheet has high water resistance, but the coefficient of friction may increase due to the infiltration of sand and dust, and weather resistance cannot be improved.
  • a stainless steel plate for example, is used as the metal plate, floating rust is likely to occur due to contact between different metals and the stainless steel plate, and the coefficient of friction increases significantly due to the infiltration of dust, so it is difficult to improve weather resistance. Can not.
  • the present invention has been made in view of the above-mentioned current situation, and aims to provide a support structure for a sliding member that can sufficiently reduce the sliding resistance of the receiving surface of the receiving member and improve weather resistance. purpose.
  • the present inventor found that even if thrust sheets made of resin materials with excellent self-lubricating properties and the same physical properties were combined, the sliding resistance of the receiving surface could not be sufficiently reduced.
  • the sliding resistance of the receiving surface can be sufficiently reduced by combining the first thrust sheet made of fluororesin, which has excellent self-lubricating properties, and has a lower hardness and coefficient of friction than polyacetal resin. This discovery led to the completion of the present invention.
  • the invention according to claim 1 provides a support structure for a sliding member that receives a thrust load of the sliding member on a receiving surface of the member, the supporting structure comprising the sliding member and the receiving member.
  • a first annular thrust sheet in contact with the sliding member and a second annular thrust sheet in contact with the receiving surface are interposed between the first thrust sheet and the first thrust sheet, the first thrust sheet being formed of polyacetal resin.
  • the gist of the invention is that the second thrust sheet is made of fluororesin.
  • the first thrust sheet and the second thrust sheet are in contact with each other.
  • the invention according to claim 3 is the invention according to claim 1 or 2, wherein the sliding member is a coil spring or an elastic member disposed in contact with a shaft end of the coil spring.
  • the gist is:
  • the sliding member is a rotating body rotatably supported by the receiving member.
  • the sliding member is a filler bolt screwed into the receiving member.
  • the sliding member is a connecting body connected to the tubular receiving member.
  • the invention according to claim 7 is the invention according to any one of claims 1 to 6, in which a convex portion is provided on the receiving surface that can be inserted inside the first thrust sheet and the second thrust sheet.
  • the gist is that the inner diameter of the first thrust sheet is larger than the inner diameter of the second thrust sheet.
  • the gist of the invention according to claim 8 is that the invention according to any one of claims 1 to 3 is used for a suspension of a vehicle.
  • the first annular thrust sheet in contact with the sliding member and the second annular thrust sheet in contact with the receiving surface are interposed between the sliding member and the receiving member.
  • the first thrust sheet is made of polyacetal resin
  • the second thrust sheet is made of fluororesin.
  • the sliding resistance of the receiving surface can be further reduced.
  • the sliding member is a coil spring or an elastic member disposed in contact with the shaft end of the coil spring, the sliding resistance of the receiving surface of the receiving member due to expansion and contraction of the coil spring is sufficiently suppressed. can be lowered to Further, when the sliding member is a rotating body rotatably supported by the receiving member, the sliding resistance of the receiving surface of the receiving member by the rotating body can be sufficiently reduced.
  • the sliding member when the sliding member is a filler bolt that is screwed into the receiving member, the sliding resistance of the receiving surface of the receiving member due to the filler bolt can be sufficiently reduced. Furthermore, when the sliding member is a connecting body connected to the tubular receiving member, the sliding resistance of the receiving surface of the receiving member caused by the connecting body can be sufficiently reduced. Further, when a convex portion is raised on the receiving surface and the inner diameter of the first thrust sheet is larger than the inner diameter of the second thrust sheet, the inner circumference of the first thrust sheet is relatively hard. A gap is formed between the receiving member and the convex portion of the receiving member. Therefore, even if the sliding member is shaken, the first thrust sheet rotates smoothly and the sliding resistance can be reduced. Furthermore, when used in a vehicle suspension, the vehicle's running performance is improved.
  • FIG. 2 is a cross-sectional view of a spring support structure according to Example 1.
  • 2 is a perspective view of first and second thrust sheets according to Example 1.
  • FIG. 1 is a table showing test results of Experimental Examples and Comparative Examples 1-5.
  • FIG. 7 is an explanatory diagram for explaining a spring support structure according to a second embodiment.
  • FIG. 7 is an explanatory diagram for explaining a support structure according to a third embodiment.
  • FIG. 7 is an explanatory diagram for explaining a support structure according to a fourth embodiment.
  • FIG. 7 is an explanatory diagram for explaining a support structure according to a fifth embodiment. It is an explanatory view for explaining other spring support structures.
  • the support structure for the sliding member is, for example, as shown in FIGS. 1 and 2, the member (4A A support structure (1A to 1F) for a sliding member received by a receiving surface (4a) of a sliding member (3, 14, 18, 22, 25, 26) and a receiving member (4A to 4F)
  • a first annular thrust sheet (11) in contact with the sliding member (3, 14, 18, 22, 25, 26) and a second annular thrust sheet (12) in contact with the receiving surface (4a).
  • the first thrust sheet (11) is made of polyacetal resin
  • the second thrust sheet (12) is made of fluororesin.
  • the use of the support structure (1A to 1F) is not particularly limited.
  • the support structure can be used, for example, in place of a thrust bearing conventionally used in equipment and the like.
  • the support structure is suitably used, for example, as a suspension for vehicles such as automobiles, motorcycles, and bicycles. Examples of this suspension type include MacPherson strut, double wishbone, multi-link, trailing arm, de Dion, torsion beam, and rigid.
  • suspension performance can be improved even in cases where the upper and lower surfaces of the coil spring cannot be installed in parallel, such as a pillow upper mount where the coil spring is directly mounted, or a torsion beam type suspension.
  • the support structure does not need to be coated with any oil or fat such as grease, it can be suitably used in, for example, food manufacturing equipment, medical equipment, on-board equipment in the aerospace industry, and the like.
  • the type, size, material, etc. of the sliding members (3, 14, 18, 22, 25, 26) are not particularly limited.
  • the sliding member include various springs (especially coil springs), rotating bodies, and the like. More specifically, the sliding member may be, for example, a coil spring (3) (see FIG. 1), or an elastic member (14) disposed in contact with the shaft end of the coil spring (3). (See FIG. 4).
  • This type of support structure for the sliding members (3, 14) is suitably used, for example, as a suspension for a vehicle.
  • the sliding member may be, for example, a rotating body (18) rotatably supported by a receiving member (4C) (see FIG. 5).
  • This type of support structure for the sliding member (18) is suitably used as, for example, a potter's wheel or a turntable.
  • the sliding member may be, for example, a filler bolt (22) screwed into the receiving member (4D) (see FIG. 6).
  • This type of support structure for the sliding member (22) is suitably used as a reservoir for oil such as differential oil, engine oil, transmission oil, etc., for example.
  • the sliding member may be, for example, a connecting body (25, 26) connected to a tubular receiving member (4E, 4F) (see FIG. 7).
  • This type of support structure for the sliding members (25, 26) is suitably used, for example, as a water faucet.
  • the type, size, material, etc. of the receiving members (4A to 4F) are not particularly limited.
  • the receiving members (4A to 4F) usually have a receiving surface (4a) that intersects (particularly perpendicularly) to the direction in which the thrust load of the sliding members (3, 14, 18, 22, 25, 26) is applied. .
  • a convex portion (7) that can be inserted into the inside of the first and second thrust sheets (11, 12) may be raised on the receiving surface (4a) (see FIG. 1).
  • the size, thickness, etc. of the first thrust sheet (11) are not particularly limited.
  • the polyacetal resin constituting the first thrust sheet may be, for example, a polyacetal homopolymer such as polyoxymethylene (for example, manufactured by DuPont, USA, trade name "Delrin”); or an oxymethylene structural unit; A polyacetal copolymer containing a comonomer structural unit (for example, manufactured by Polyplastics Co., Ltd., trade name "Duracon”) may be used.
  • the first thrust sheet may contain, for example, a lubricant and/or additives (eg, graphite fibers, glass fibers, metal fibers, powder, etc.).
  • the size, thickness, etc. of the second thrust sheet (12) are not particularly limited.
  • the fluororesin constituting the second thrust sheet include PTFE (polytetrafluoroethylene), FEP (tetrafluoroethylene/hexafluoropropylene copolymer), PFA (perfluoroalkoxyfluororesin), ETFE ( Examples include ethylene/tetrafluoroethylene copolymer).
  • the inner diameters (id1, id2) of the first and second thrust sheets (11, 12) may be set to the same value, for example, but the inner diameter (id1) of the first thrust sheet (11) It is preferable that the inner diameter (id2) of the seat (12) is set to a larger value. This is because a gap (S) is formed between the outer periphery of the convex portion (7) of the receiving member (4A to 4F) and the inner periphery of the first thrust sheet (11), so that the sliding member (3) This is because the sliding resistance can be reduced even if the surface is shaken (see FIG. 1).
  • the difference (id1-id2) between the inner diameter (id1) of the first thrust sheet (11) and the inner diameter (id2) of the second thrust sheet (12) is, for example, 0.1 to 3 mm (preferably 0.5 to 3 mm). 2 mm).
  • the outer diameters (od1, od2) of the first and second thrust sheets (11, 12) may be set to different values, for example, but when the first and second thrust sheets (11, 12) are assembled, From the viewpoint of performance, it is preferable that the outer diameters (od1, od2) of the first and second thrust sheets (11, 12) are set to substantially the same value.
  • another thrust sheet may be interposed between the first and second thrust sheets (11, 12), but from the viewpoint of reducing the number of parts, the first and second thrust sheets (11, 12) , 12) are preferably directly overlapped.
  • the first and second thrust sheets (11, 12) , 12) are preferably directly overlapped.
  • other thrust sheets for example, one or more thrust sheets made of polyacetal resin, one or more thrust sheets made of fluororesin, or both. It is also possible to adopt a thrust sheet that combines the following.
  • a reference example includes a configuration in which a first thrust sheet made of polyacetal resin, a second thrust sheet made of fluororesin, and a third thrust sheet made of polyacetal resin are laminated.
  • Another example is a configuration in which first to third thrust sheets made of fluororesin are laminated.
  • the polyacetal resin that constitutes the first thrust sheet (11) has extremely excellent fatigue resistance. It is also a very well-balanced resin with excellent friction and abrasion resistance, low noise, chemical resistance, creep resistance, and dimensional stability. Water absorption is low. Originally, it has poor weather resistance, but recently grades with improved weather resistance have been developed by selecting UV stabilizers and pigments. It is also most commonly used in general environmental temperature ranges (automobiles, office equipment, AVs, etc.). It also has well-balanced mechanical properties as an engineering plastic and is self-lubricating. Furthermore, it has good moldability, is inexpensive, and has good dimensional accuracy. Furthermore, the sliding properties are significantly improved by adding lubricants and the like.
  • polyacetal resin examples include, for example, a specific gravity of 1.41 to 1.42 and a hardness (Rockwell) of M90/R120.
  • mechanical properties for example, tensile yield stress is 61 to 69 MPa, breaking strain is 20 to 75%, tensile modulus is 2800 MPa, Izod impact strength is 6.9 to 12.0 KJ/m 2 , and compressive yield stress is 61 to 69 MPa.
  • the bending stress is 98 to 130 MPa
  • the bending stress is 88 to 96 MPa
  • the tapered wear resistance is 6 to 20 mg/1000.
  • the heat resistance temperature (continuous) is 90 to 100 degrees Celsius
  • the load deflection temperature (0.45/1.8 MPa) is 160 to 170 degrees Celsius/110 to 120 degrees Celsius
  • the embrittlement temperature is -40 degrees Celsius. It is known that it has a coefficient of linear expansion of 8.1 to 8.5 ⁇ 10 ⁇ 5 K ⁇ 1 , a thermal conductivity of 0.25 W/m ⁇ k, and a slow combustion heat resistance.
  • its electrical properties include, for example, a volume resistivity of 10 15-17 ⁇ cm, a withstand voltage of 26 to 34 MV/m, and a dielectric constant of 3.1 to 3.9 ⁇ 10 6 Hz. ing.
  • the fluororesin constituting the second thrust sheet (12) has extremely excellent heat resistance, cold resistance, chemical resistance, hot water resistance, and weather resistance. Furthermore, it has excellent non-adhesive properties, low friction properties, and high frequency properties.
  • PTFE resin is the most popular material among the fluororesin series and is widely used. It also has the lowest coefficient of friction among existing materials and has excellent chemical resistance, so it has a wide range of applications. Its own wear resistance and mechanical strength can be used by adding fillers or by layering with metallic materials. The improvement effect is remarkable.
  • PTFE resin physical properties include, for example, a specific gravity of 1.70 to 2.20 and a hardness (Rockwell) of R75 to 95.
  • mechanical properties for example, tensile yield stress is 19 to 34 MPa, breaking strain is 200 to 400%, tensile modulus is 390 MPa, Izod impact strength is 14 to 16 KJ/m 2 , compressive yield stress is 15 MPa, and taper It is known that the formula wear resistance is 7 mg/1000.
  • the heat resistance temperature (continuous) is 290°C
  • the deflection temperature under load (0.45/1.8MPa) is 121°C/90°C
  • the embrittlement temperature is ⁇ -100°C
  • the coefficient of linear expansion is It is known to have a thermal conductivity of 4.5 to 7.0 ⁇ 10 ⁇ 5 K ⁇ 1 , a thermal conductivity of 0.12 to 0.25 W/m ⁇ k, and a nonflammable heat resistance.
  • electrical properties it is known that, for example, the volume resistivity is >10 20 ⁇ cm, the withstand voltage is 19 MV/m, and the dielectric constant is ⁇ 2.1 ⁇ 10 6 Hz.
  • the static friction coefficient of polyacetal resin is 0.32 and the dynamic friction coefficient is 0.18
  • the static friction coefficient of PTFE resin (natural) is 0.13 and the dynamic friction coefficient is 0.09. It is known that there is.
  • the specific wear amount of PTFE resin (natural) is 1.0
  • the specific wear amount of polyacetal resin (homopolymer, natural) is 2.4
  • the specific wear amount of polyacetal resin (homopolymer, carbon glass filled) is 2.4. is known to be 2.0.
  • the material of the first thrust sheet (11) in contact with the sliding member (3, 14, 18, 22, 25, 26) is polyacetal, which has excellent self-lubricating properties.
  • fluororesin is used, which has excellent self-lubricating properties and has a smaller hardness and coefficient of friction than polyacetal resin.
  • the sliding resistance of the receiving surfaces (4a) of the receiving members (4A to 4F) by the sliding members (3, 14, 18, 22, 25, 26) is sufficiently reduced. Furthermore, it is difficult for sand and dust to enter, and weather resistance is improved.
  • the cushioning function of the second thrust sheet (12) acts directly on the first thrust sheet (11). The effect of reducing sliding resistance and the effect of suppressing the infiltration of dust, etc. become remarkable.
  • the support structure (1A to 1F) of this sliding member is used in an environment where the temperature is high, heat can be effectively absorbed and dispersed by the second thrust sheet (12), which has excellent thermal properties. Therefore, thermal expansion of the first thrust sheet (11) is covered and durability is improved.
  • Examples 1 to 5 a spring support structure used in an automobile suspension is exemplified as the “sliding member support structure" according to the present invention.
  • the spring support structure 1A As shown in FIGS. 1 and 2, the spring support structure 1A according to the present embodiment has both shaft ends of the coil spring 3 (exemplified as a "sliding member” according to the present invention) on the upper and lower sides. It is supported by a receiving member 4A (spring seat). Between the shaft end of the coil spring 3 and the receiving member 4A, there is a first annular thrust sheet 11 in contact with the shaft end surface of the coil spring 3 and a second annular thrust seat in contact with the receiving surface 4a of the receiving member 4A. The sheets 12 are interposed in an overlapping state.
  • the coil spring 3 is made of metal (for example, spring steel, etc.). Further, the receiving member 4A is made of a metal different from that of the coil spring 3 (for example, aluminum, etc.). Further, the receiving member 4A has a receiving surface 4a that is perpendicular to the axial direction of the coil spring 3. A cylindrical convex portion 7 that can be inserted into the inside of the first and second thrust sheets 11 and 12 is raised on the receiving surface 4a. Furthermore, the receiving member 4A is formed into a circular shape in plan view.
  • a damper 8 is attached to the inside of the lower receiving member 4A, as shown by the imaginary line in FIG. Further, the piston rod 8a of the damper 8 is inserted through the center hole of the upper receiving member 4A. An upper mount 9 that is fixed to a component on the automobile side is attached to the tip side of the piston rod 8a.
  • the first thrust sheet 11 is made of polyacetal resin (for example, Duracon, etc.).
  • the first thrust sheet 11 has an inner diameter id1 of about 65 mm, an outer diameter od1 of about 84 mm, and a thickness t1 of about 1 mm (see FIG. 2).
  • the second thrust sheet 12 is made of fluororesin (for example, PTFE, etc.).
  • the second thrust sheet 12 has an inner diameter id2 of about 64 mm, an outer diameter od2 of about 84 mm, and a thickness t2 of about 1 mm (see FIG. 2).
  • the outer diameters od1 and od2 of the first and second thrust sheets 11 and 12 are set to approximately the same value. Further, the inner diameter id1 of the first thrust sheet 11 is set to a larger value than the inner diameter id2 of the second thrust sheet 12.
  • a gap S is formed between the outer periphery of the convex portion 7 of the receiving member 4A and the inner periphery of the first thrust sheet 11 (see FIG. 1). On the other hand, no gap is formed between the outer periphery of the convex portion 7 of the receiving member 4A and the inner periphery of the second thrust sheet 12.
  • first annular thrust sheet 11 in contact with the shaft end of the coil spring 3 and a second annular thrust seat in contact with the receiving surface 4a.
  • the first thrust sheet 11 is made of polyacetal resin
  • the second thrust sheet 12 is made of fluororesin.
  • the first thrust sheet 11 made of polyacetal resin with excellent self-lubricating properties and the second thrust sheet 12 made of fluororesin with excellent self-lubricating properties and a smaller hardness and coefficient of friction than polyacetal resin are combined. Therefore, the sliding resistance of the receiving surface 4a of the receiving member 4A due to the expansion and contraction of the coil spring 3 can be sufficiently reduced, and durability can be improved.
  • this spring support structure 1A is placed near the engine and may reach a high temperature of 60 to 70 degrees Celsius in summer, but the second thrust sheet 12 with excellent thermal properties effectively dissipates the heat. Since the thermal expansion of the first thrust sheet 11 is absorbed and dispersed, the thermal expansion of the first thrust sheet 11 is covered.
  • the convex portion 7 is raised on the receiving surface 4a, and the inner diameter id1 of the first thrust sheet 11 is set to a larger value than the inner diameter id2 of the second thrust sheet 12. There is. Thereby, a gap S is formed between the inner periphery of the first thrust sheet 11 and the outer periphery of the convex portion 7 of the receiving member 4A. Therefore, even if the coil spring 3 is shaken, the first thrust sheet 11 can smoothly rotate together with the first thrust sheet 11 to reduce the sliding resistance.
  • the outer diameters od1 and od2 of the first and second thrust sheets 11 and 12 are set to approximately the same value. As a result, even if the above-mentioned gap S is formed, by aligning the outer peripheries of the first and second thrust sheets 11 and 12, both sheets 11 and 12 can be set at the proper assembly position. can.
  • one Duracon sheet and one PTFE sheet were stacked and interposed between the coil spring and the receiving member. Furthermore, in Comparative Example 1, one Duracon sheet was interposed between the coil spring and the receiving member. Furthermore, in Comparative Example 2, a metal thrust bearing was interposed between the coil spring and the receiving member. Furthermore, in Comparative Example 3, one nylon or Duracon resin sheet and one stainless steel plate were stacked and interposed between the coil spring and the receiving member. In Comparative Example 4, two PTFE sheets were stacked and interposed between the coil spring and the receiving member. Furthermore, in Comparative Example 5, two Duracon sheets were stacked and interposed between the coil spring and the receiving member.
  • the spring support structure of the experimental example can be attached to both ends of the coil spring. Recommended mounting positions are one end and both ends of the spring. Furthermore, in the experimental example, maintenance requires replacement of the Duracon sheet and the PTFE sheet when they are worn out. Further, the annular Duracon sheet and PTFE sheet can be obtained by cutting out the material.
  • Comparative Example 1 it was confirmed that the sliding resistance of the contact surface of the receiving member (spring mount) due to the vertical movement of the coil spring was clearly reduced.
  • it since it is a single Duracon sheet, it has high water resistance, but the coefficient of friction tends to increase due to the intrusion of sand and dust, and it was confirmed that weather resistance is somewhat low.
  • Comparative Example 1 can be attached to both ends of the coil spring. Recommended mounting locations are preferably at both ends of the spring. Furthermore, in Comparative Example 1, maintenance requires replacing the Duracon sheet when it wears out. Further, an annular Duracon sheet can be obtained by cutting out the material.
  • Comparative Example 2 it was confirmed that the sliding resistance of the contact surface of the receiving member (spring mount) due to the vertical movement of the coil spring was significantly reduced. Additionally, because it uses metal bearings, it is strictly prohibited to allow water or dust to enter the case, and it has been confirmed that floating rust is likely to occur due to contact between dissimilar metals, and weather resistance is low.
  • Comparative Example 2 can be attached to only one end of the spring. Further, in Comparative Example 1, regular overhaul work is required as maintenance. Furthermore, Comparative Example 2 requires a thrust bearing and a case dedicated to the thrust bearing.
  • Comparative Example 3 it was confirmed that the sliding resistance of the contact surface of the receiving member (spring mount) due to the vertical movement of the coil spring was clearly reduced. It was also confirmed that floating rust is likely to occur due to contact between the stainless steel plate and dissimilar metals, and the coefficient of friction tends to increase due to the intrusion of sand and dust, resulting in poor weather resistance.
  • Comparative Example 3 can be attached to both ends of the coil spring. Recommended mounting locations are preferably at both ends of the spring. Furthermore, in Comparative Example 3, maintenance requires checking the condition of the stainless steel plate and greasing it. Further, the annular resin sheet and stainless steel plate can be obtained by cutting out the material.
  • Comparative Example 4 since the material was a soft resin, it was confirmed that if the spring ends dug in, smooth operation would be difficult.
  • Comparative Example 5 since the material was a hard resin, friction tended to increase, and it was confirmed that it was not suitable for multi-plate use.
  • the spring support structure 1B includes a rubber elastic member 14 (exemplified as a "sliding member” according to the present invention) disposed in contact with the shaft end of the coil spring 3. ) is supported by a metal receiving member 4B on the vehicle body side (vehicle body side receiving member 4B). Between the elastic member 14 and the receiving member 4B, a first annular thrust sheet 11 in contact with the surface of the elastic member 14 and a second annular thrust sheet 12 in contact with the receiving surface 4a of the receiving member 4B are overlapped. It is mediated in a state of being
  • the first thrust sheet 11 is made of polyacetal resin (eg, Duracon, etc.). Further, the second thrust sheet 12 is made of fluororesin (eg, PTFE, etc.).
  • a support structure 1C for a rotating body used as a potter's wheel or a turntable is exemplified as the "support structure for a sliding member" according to the present invention.
  • the rotary body support structure 1C supports the rotary body 18 including the rotary shaft 17 so as to be rotatable around an axis perpendicular to the receiving surface 4a of the receiving member 4C, and supports the thrust load of the rotary body 18. It is configured to be received by the receiving surface 4a of the receiving member 4C.
  • a first annular thrust sheet 11 in contact with the rotating body 18 and a second annular thrust sheet 12 in contact with the receiving surface 4a of the receiving member 4C. They are interposed in an overlapping state.
  • the first thrust sheet 11 is made of polyacetal resin (eg, Duracon, etc.).
  • the second thrust sheet 12 is made of fluororesin (eg, PTFE, etc.).
  • the support structure 1C for the rotating body may be used in place of a metal bearing, or may be used in combination with a metal bearing.
  • the sliding resistance of the receiving surface 4a of the receiving member 4C by the rotary body 18 can be sufficiently reduced to improve durability.
  • the rotating body 18 can be stably rotated for a long period of time with respect to the receiving member 4C.
  • this filler bolt support structure 1D is configured such that the filler bolt 22 is screwed into a threaded portion 23 formed on a receiving member 4D, and the thrust load of the filler bolt 22 is received on the receiving surface 4a of the member 4D. It is composed of Between the head 22a of the filler bolt 22 and the receiving member 4D, there is a first annular thrust sheet 11 in contact with the head 22a of the filler bolt 22 and a second annular thrust sheet in contact with the receiving surface 4a of the receiving member 4D. A thrust sheet 12 is interposed in an overlapping state.
  • the first thrust sheet 11 is made of polyacetal resin (eg, Duracon, etc.).
  • the second thrust sheet 12 is made of fluororesin (eg, PTFE, etc.).
  • the sliding resistance of the receiving surface 4a of the receiving member 4D by the filler bolt 22 can be sufficiently reduced to improve durability.
  • force is applied uniformly from the filler bolt 22 to the receiving surface 4a, allowing the first and second thrust sheets 11 and 12 to function effectively as gaskets.
  • support structures 1E and 1F according to the fifth embodiment will be explained, but parts having substantially the same configuration as the spring support structure 1A according to the first embodiment will be given the same reference numerals, and detailed explanation will be omitted.
  • support structures 1E and 1F for a connecting body used as a water faucet are exemplified as the "support structure for a sliding member" according to the present invention.
  • connection body As shown in FIG. 7, the support structure 1E of this connection body is constructed by screwing a nut body 25 (exemplified as a “connection body” according to the present invention) into a tubular receiving member 4E, and receiving the thrust load of the nut body 25. It is configured to be received by the receiving surface 4a (shaft end surface) of the member 4E.
  • a first annular thrust sheet 11 in contact with the nut body 25 and a second annular thrust sheet 12 in contact with the receiving surface 4a of the receiving member 4E are stacked between the nut body 25 and the receiving member 4E. mediated by the state.
  • the first thrust sheet 11 is made of polyacetal resin (eg, Duracon, etc.).
  • the second thrust sheet 12 is made of fluororesin (eg, PTFE, etc.).
  • a faucet operating section 30 is provided in the center of the nut body 25 so as to penetrate therethrough.
  • the faucet operation unit 30 includes a handle 31, a spindle 32 that moves along the axis of the receiving member 4E when the handle 31 is operated, and a piece packing 33 that is provided at the tip of the spindle 32 and opens and closes the hole 34. We are prepared.
  • the sliding resistance of the receiving surface 4a of the receiving member 4E by the nut body 25 can be sufficiently reduced, and the durability can be increased.
  • the first and second thrust sheets 11 and 12 can effectively function as packing in the water faucet section.
  • connection body rotatably supports the faucet spout 26 (exemplified as the “connection body” according to the present invention) on the tubular receiving member 4F, and receives the thrust load of the faucet spout 26 on the member 4F. It is configured to be received by a receiving surface 4a (shaft end surface).
  • a first annular thrust sheet 11 in contact with the enlarged diameter portion 26a of the faucet spout 26 and a second annular thrust sheet 12 in contact with the receiving surface 4a of the receiving member 4F are provided. are interposed in a superimposed state.
  • the first thrust sheet 11 is made of polyacetal resin (eg, Duracon, etc.).
  • second thrust sheet 12 is made of fluororesin (eg, PTFE, etc.). Note that a nut body 35 is screwed onto the tip of the receiving member 4F.
  • the sliding resistance of the receiving surface 4a of the receiving member 4F by the faucet spout 26 can be sufficiently reduced, and durability can be increased.
  • the faucet spout 26 can be stably rotated over a long period of time with respect to the receiving member 4F, and the first and second thrust sheets 11 and 12 can effectively function as packing in the water faucet.
  • the present invention is not limited to the above-mentioned Examples 1 to 5, and various changes can be made within the scope of the present invention depending on the purpose and use. That is, in the first embodiment, the spring support structure 1A is illustrated as having two pairs of thrust sheets 11 and 12 corresponding to both ends of the coil spring 3, but the structure is not limited to this.
  • the spring support structure 1A may include a pair of thrust sheets 11 and 12 corresponding to only the ends.
  • a pair of first and second thrust seats is attached to a receiving member 4 that connects the axial ends of both springs 3.
  • Two sets of 11 and 12 may be provided.
  • the gap S is formed between the inner periphery of the first thrust sheet 11 and the outer periphery of the convex portion 7 of the receiving member 4A.
  • the gap S may not be formed between the inner periphery of the first thrust sheet 11 and the outer periphery of the convex portion 7 of the receiving member 4A.
  • gap S is not formed between the inner periphery of the second thrust sheet 12 and the outer periphery of the convex portion 7 of the receiving member 4A
  • the present invention is not limited to this.
  • a gap S may be formed between the inner periphery of the second thrust sheet 12 and the outer periphery of the convex portion 7 of the receiving member 4A.
  • the present invention is widely used as a technique for supporting a sliding member with a receiving member.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sliding-Contact Bearings (AREA)

Abstract

La présente invention concerne une structure de support d'élément coulissant qui peut réduire suffisamment une résistance au glissement sur une surface de réception d'un élément de réception, et améliorer la résistance aux intempéries. La structure de support d'élément coulissant est une structure de support d'élément coulissant 1A destinée à recevoir l'effort de poussée d'un élément coulissant (ressort hélicoïdal 3) sur une surface de réception 4a d'un élément de réception 4A, une première plaque de poussée annulaire 11, qui est en contact avec l'élément coulissant, et une seconde plaque de poussée annulaire 12, qui est en contact avec la surface de réception, étant intercalées entre l'élément coulissant et l'élément de réception, et la première plaque de poussée étant constituée de résine polyacétal, et la seconde plaque de poussée étant constituée de résine fluorée.
PCT/JP2022/017068 2022-04-04 2022-04-04 Structure de support d'élément coulissant WO2023195055A1 (fr)

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Application Number Priority Date Filing Date Title
PCT/JP2022/017068 WO2023195055A1 (fr) 2022-04-04 2022-04-04 Structure de support d'élément coulissant

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2022/017068 WO2023195055A1 (fr) 2022-04-04 2022-04-04 Structure de support d'élément coulissant

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WO2023195055A1 true WO2023195055A1 (fr) 2023-10-12

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6213221U (fr) * 1985-07-10 1987-01-27
JP2001012542A (ja) * 1999-06-24 2001-01-16 Daido Metal Co Ltd 免震用支承装置
JP2003214425A (ja) * 2002-01-22 2003-07-30 Oiles Ind Co Ltd スラスト滑り軸受
JP2004053006A (ja) * 2002-03-20 2004-02-19 Tokyo Electron Ltd 管継手
JP2022066163A (ja) * 2020-10-16 2022-04-28 株式会社エムアイエス 摺動部材の支持構造

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6213221U (fr) * 1985-07-10 1987-01-27
JP2001012542A (ja) * 1999-06-24 2001-01-16 Daido Metal Co Ltd 免震用支承装置
JP2003214425A (ja) * 2002-01-22 2003-07-30 Oiles Ind Co Ltd スラスト滑り軸受
JP2004053006A (ja) * 2002-03-20 2004-02-19 Tokyo Electron Ltd 管継手
JP2022066163A (ja) * 2020-10-16 2022-04-28 株式会社エムアイエス 摺動部材の支持構造

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