WO2016098643A1 - ホイールの多片リム構造 - Google Patents
ホイールの多片リム構造 Download PDFInfo
- Publication number
- WO2016098643A1 WO2016098643A1 PCT/JP2015/084393 JP2015084393W WO2016098643A1 WO 2016098643 A1 WO2016098643 A1 WO 2016098643A1 JP 2015084393 W JP2015084393 W JP 2015084393W WO 2016098643 A1 WO2016098643 A1 WO 2016098643A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- lock ring
- groove
- sacrificial anticorrosive
- anticorrosive material
- rim structure
- Prior art date
Links
- 239000000463 material Substances 0.000 claims abstract description 65
- 239000011324 bead Substances 0.000 claims abstract description 29
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229910052751 metal Inorganic materials 0.000 claims abstract description 12
- 239000002184 metal Substances 0.000 claims abstract description 12
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 9
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910052742 iron Inorganic materials 0.000 claims abstract description 7
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 6
- 239000011701 zinc Substances 0.000 claims abstract description 6
- 239000011347 resin Substances 0.000 claims description 4
- 229920005989 resin Polymers 0.000 claims description 4
- 229910001297 Zn alloy Inorganic materials 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 2
- 238000005260 corrosion Methods 0.000 abstract description 18
- 230000007797 corrosion Effects 0.000 abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 239000011247 coating layer Substances 0.000 description 4
- 239000010410 layer Substances 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000013459 approach Methods 0.000 description 2
- 238000005121 nitriding Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000007751 thermal spraying Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B25/00—Rims built-up of several main parts ; Locking means for the rim parts
- B60B25/02—Segmented rims, e.g. with segments arranged in sections; Connecting equipment, e.g. hinges; Insertable flange rings therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B25/00—Rims built-up of several main parts ; Locking means for the rim parts
- B60B25/04—Rims with dismountable flange rings, seat rings, or lock rings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B25/00—Rims built-up of several main parts ; Locking means for the rim parts
- B60B25/04—Rims with dismountable flange rings, seat rings, or lock rings
- B60B25/14—Locking means for flange rings or seat rings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B25/00—Rims built-up of several main parts ; Locking means for the rim parts
- B60B25/22—Other apurtenances, e.g. for sealing the component parts enabling the use of tubeless tyres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B2900/00—Purpose of invention
- B60B2900/10—Reduction of
- B60B2900/141—Corrosions
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
- C09D5/082—Anti-corrosive paints characterised by the anti-corrosive pigment
- C09D5/084—Inorganic compounds
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
- C09D5/10—Anti-corrosive paints containing metal dust
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
- C09D5/10—Anti-corrosive paints containing metal dust
- C09D5/103—Anti-corrosive paints containing metal dust containing Al
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
- C09D5/10—Anti-corrosive paints containing metal dust
- C09D5/106—Anti-corrosive paints containing metal dust containing Zn
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
Definitions
- the present invention relates to a multi-piece rim structure of a wheel installed in a large vehicle used in a mine.
- a rim structure is composed of a plurality of pieces in order to make it easy to attach a heavy tire.
- the known multi-piece rim structure 1 shown in FIG. 6 includes five pieces, that is, a rim base 10, a bead seat ring 20 (ring member), a lock ring 30, and a pair of side rings 40 and 50.
- axial direction”, “radial direction”, and “circumferential direction” refer to the axial direction, radial direction, and circumferential direction of the multi-piece rim structure, respectively.
- Axial outside refers to the side away from the axial center position of the tire set on the multi-piece rim in the axial direction.
- “Axial inner side” refers to the center position of the tire along the axial direction. The side that approaches.
- the rim base 10 is configured by welding three short cylindrical members in order in the axial direction (width direction). Each of these short cylindrical members can be obtained by rounding a strip-shaped rolled steel plate into a cylindrical shape and welding the both end faces.
- the rim base 10 has a gutter band portion 11 on one side in the axial direction and a back flange portion 12 on the other side.
- the bead seat ring 20 is disposed on the radially outer side of the gutter band portion 11 of the rim base 10.
- One side ring 40 is disposed on the outer side in the radial direction of the bead seat ring 20, and is locked to an annular standing flange portion 21 formed on the outer periphery in the axial direction of the bead seat ring 20.
- the other side ring 50 is locked to the back flange portion 12 of the rim base 10.
- the outer peripheral surface of the bead seat ring 20 is provided as a bead seat portion 22 having a width W. Further, the outer peripheral surface of the portion adjacent to the side ring 50 in the rim base 10 is provided as a bead seat portion 13 having a width W. A pair of bead portions of a tire (not shown) is placed on these bead seat portions 22 and 13. On the inner periphery of the outer edge of the bead seat ring 20 in the axial direction, a tapered annular load application surface 23 is formed.
- the side ring 50, the tire, the side ring 40, and the bead seat ring 20 are moved in the axial direction from the gutter band portion 11 to the back flange portion 12 in this order.
- the rim base 10 is mounted, and finally the lock ring 30 is fitted into the rim base 10.
- a seal ring 60 made of an O-ring is fitted into a seal ring groove 16 (described later) of the gutter band portion 11.
- the seal ring 60 is for sealing between the bead seat ring 20 and the gutter band portion 11.
- a multi-piece rim structure 1 'shown in Fig. 7 is also known.
- the multi-piece rim structure 1 ′ includes three pieces, that is, a rim base 10 ′, a ring member 5, and a lock ring 30.
- the rim base 10 ' has a side ring portion 50' integrally.
- the side ring portion 50 ' corresponds to the side ring 50 and the back flange 12 of the multi-piece rim structure 1 shown in FIG.
- the ring member 5 integrally includes a bead seat ring portion 20 'and a side ring portion 40'.
- the bead seat ring portion 20 'and the side ring portion 40' correspond to the bead seat ring 20 and the side ring 40 of the rim structure 1 shown in FIG. Since other configurations are the same as those in FIG. 6, the same reference numerals are given and detailed descriptions thereof are omitted.
- rim structures 1A and 1B used in the double tire type vehicle shown in FIG. 8 are also known.
- the rim structure 1A for holding the inner tire Ta close to the vehicle has the same configuration as that of FIG. 6, and in the rim structure 1B for holding the outer tire Tb far from the vehicle, both end portions in the axial direction of the rim base 10 ′′ are gutter bands.
- a bead seat ring 20, a lock ring 30, and a side ring 40 are attached to each of these gutter band portions 11.
- a lock ring groove 15 and a seal ring groove 16 positioned on the inner side in the axial direction from the lock ring groove 15 are formed on the outer peripheral surface of the gutter band portion 11.
- the profile of the cross section of the lock ring groove 15 is a concave curve.
- a first receiving surface 17 having a cylindrical surface is formed on the inner side in the axial direction from the lock ring groove 15, that is, between the lock ring groove 15 and the seal ring groove 16.
- a second receiving surface 18 made of a cylindrical surface is formed on the outer side in the axial direction from the lock ring groove 15, that is, between the lock ring groove 15 and the outer edge of the gutter band portion 11.
- the lock ring 30 is interposed between the gutter band portion 11 of the rim base 10 and the bead seat ring 20 (or the ring member 5).
- the lock ring 30 has an annular shape but is cut at one place.
- An annular load receiving surface 31 having a taper is formed on the outer periphery of the inner edge of the lock ring 30 in the axial direction.
- the lock ring 30 has an annular ridge 35 that is continuous in the circumferential direction at an axially intermediate position on the inner circumference thereof, and a first abutment surface 37 that is a cylindrical surface axially inward of the ridge 35. And has a second contact surface 38 formed of a cylindrical surface on the outer side in the axial direction.
- the profile of the cross section of the ridge 35 is a convex curve.
- the protrusion 35 fits into the lock ring groove 15 of the gutter band portion 11, and the load receiving surface 31 applies a load to the bead seat ring 20 (or ring member 5).
- the first contact surface 37 is in surface contact with the surface 23, the first contact surface 37 is in surface contact with the first receiving surface 17 of the gutter band portion 11, and the second contact surface 38 is in surface contact with the second receiving surface 18.
- a radial load is applied to the bead seat ring 20 (or the ring member 5) from one bead portion of the tire. Further, an axial load is applied to the bead seat ring 20 (or the ring member 5) from the bead portion via the side ring 40 (or the side ring portion 50 '). Most of the radial load and the axial load applied to the bead seat ring 20 (or the ring member 5) are transmitted to the lock ring 30 via the load applying surface 23 and the load receiving surface 31. It is transmitted to the gutter band unit 11.
- the load transmission path from the lock ring 30 to the gutter band 11 will be described in detail.
- the radial load is transmitted via the surface contact region R1 of the first contact surface 37 and the first receiving surface 17, and the surface contact region R2 of the second contact surface 38 and the second receiving surface 18.
- the axial load is transmitted via a surface contact region R ⁇ b> 3 between the axially outer portion of the outer surface of the protrusion 35 of the lock ring 30 and the axially outer portion of the inner surface of the lock ring groove 15.
- a minute reciprocal sliding occurs between the gutter band portion 11 and the lock ring 30 as the vehicle travels, and a repeated load is applied, resulting in thinning due to wear.
- a crack 100 occurs due to fretting fatigue in the surface contact region R3. If these thinnings and cracks are left unattended, there is a risk that parts will come off during running and will not be able to run.
- the multi-piece rim structure 1, 1 ', 1A, 1B also causes a problem of thinning due to corrosion. Details will be described below.
- the protrusion 35 of the lock ring 30 is fitted in the lock ring groove 15 of the gutter band portion 11 with play in the radial direction and the axial direction. Since the lock ring 30 receives the axially outward load from the bead portion of the tire, the region extending from the axially inner portion to the top portion on the outer surface of the protrusion 35 and the axially inner portion on the inner surface of the lockring groove 15. A gap 70 is formed in the region from the bottom to the bottom.
- the present applicant has a coating layer of a normally dry paint on the inner surface of the lock ring groove of the gutter band portion and the first and second receiving surfaces adjacent to the lock ring groove. It has been proposed to impart fretting resistance and corrosion resistance to a multi-piece rim structure by forming a film layer of a normal drying lubricant on the film. In addition, as disclosed in Patent Document 2, the present applicant also proposes forming a hardened layer by ion nitriding treatment on the inner surface of the lock ring groove of the gutter band portion and the first and second receiving surfaces. .
- a rim base having an annular lock ring groove on the outer periphery of the axial end;
- a ring member disposed on the outer side of the rim base in the radial direction and receiving a radial and axial load from a bead portion of the tire; and
- An annular protrusion is provided on the inner periphery, and the protrusion is fitted to the lock ring groove to be attached to the rim base, and receives the radial and axial loads from the ring member to lock the ring member.
- Lock ring to In the multi-piece rim structure of the wheel with A sacrificial anticorrosive material containing a metal having a higher ionization tendency than the base material of the rim base and the lock ring is provided on at least one of the surfaces of the rim base and the lock ring facing each other.
- the ionization and the resulting corrosion occur in the metal having a large ionization tendency of the sacrificial anticorrosive material, the ionization of the rim base and the lock ring base material can be suppressed, and the corrosion of the base material can be suppressed.
- the fretting fatigue can be prevented from being promoted by corrosion at the axially outer portion of the inner surface of the lock ring groove, and the fretting resistance can be improved. As a result, the life of the rim structure can be extended.
- At least one of the surfaces of the rim base and the lock ring facing each other is formed with a relief groove extending in the circumferential direction, and the sacrificial anticorrosive material is provided in the relief groove. Even when the lock ring is running or when the tire air pressure is released, the sacrificial anticorrosive material in the escape groove is not affected by the lock ring, and the sacrificial anticorrosive member can be held for a long period of time.
- the relief groove is formed in a portion on the inner side in the axial direction on the inner surface of the lock ring groove and / or the bottom.
- the sacrificial anticorrosive material can be exposed in the gap between the inner surface of the lock ring groove where the water easily collects and the outer surface of the lock ring, and as a result, ionization of the sacrificial anticorrosive material is promoted, thereby Further, corrosion of the surface contact area between the lock ring and the rim base can be suppressed.
- the escape groove is formed in a portion and / or top portion on the axially inner side of the outer surface of the protrusion of the lock ring.
- the sacrificial anticorrosive material can be exposed in the gap between the inner surface of the lock ring groove and the outer surface of the lock ring where water easily collects, and the corrosion of the surface contact area between the lock ring and the rim base can be reliably suppressed. it can.
- the sacrificial anticorrosive material can be exposed in the gap between the inner surface of the lock ring groove where water easily collects and the outer surface of the protrusion of the lock ring, and corrosion of the surface contact area between the lock ring and the rim base is reliably suppressed. be able to.
- This configuration is obtained by a mismatch between the outer surface shape of the protrusion of the lock ring and the inner surface shape of the lock ring groove.
- the bottom of the inner surface of the lock ring groove and the top of the outer surface of the lock ring ridge are spaced apart from each other, and the bottom of the inner surface of the lock ring groove and the ridge of the lock ring
- the sacrificial anticorrosive material is provided on at least one of the tops on the outer surface of the substrate. According to this configuration, it is possible to suppress peeling of the sacrificial anticorrosive material due to axial movement of the lock ring during traveling and movement inward in the axial direction when the tire air pressure is released without forming a relief groove.
- the sacrificial anticorrosive material can be exposed in the gap between the inner surface of the lock ring groove where water easily collects and the outer surface of the protrusion of the lock ring, and corrosion of the surface contact area between the lock ring and the rim base is reliably suppressed. be able to.
- the base material of the rim base and the lock ring is made of iron, and the sacrificial anticorrosive material contains zinc, aluminum, or an alloy of zinc and aluminum as a metal having a higher ionization tendency than iron.
- the sacrificial anticorrosive material may be composed of the above-mentioned metal that has been sprayed or plated, or may be composed of a mixture of a resin and the above-described metal that has been applied.
- FIG. 1B is a view corresponding to FIG. 1A in which the position of the sacrificial anticorrosive material is changed.
- FIG. 1B is a view corresponding to FIG. 1A in which the position of the sacrificial anticorrosive material is changed.
- the multi-piece rim structure in the multi-piece rim structure according to the present invention, it is a main part enlarged cross-sectional view showing an embodiment in which a sacrificial anticorrosive material is provided in a relief groove formed on the outer surface of the ridge of the lock ring. It is the figure equivalent to FIG. 2A which changed the position of the sacrificial anticorrosive material. It is the figure equivalent to FIG. 2A which changed the position of the sacrificial anticorrosive material. It is a principal part expanded sectional view which shows embodiment which provided the sacrificial anticorrosive material in the inner surface of the lock ring groove
- FIG. 3A it is a figure which shows the state which the lock ring moved to the axial direction inner side to the maximum when the air pressure of a tire was extracted. It is a principal part expanded sectional view which shows embodiment which provided the sacrificial anticorrosive material in the outer surface of the protrusion of the lock ring, without forming a relief groove, and shows the normal state which the lock ring moved to the axial direction outermost.
- FIG. 4B is a diagram showing a state where the lock ring is moved to the maximum inside in the axial direction when the tire air pressure is released in the embodiment of FIG. 4A.
- a lock ring it is a principal part expanded sectional view which shows embodiment which provided the sacrificial anticorrosive material in the contact surface adjacent to a protrusion. It is a principal part expanded sectional view which shows embodiment which provided the sacrificial anticorrosive material in the receiving surface adjacent to a lock ring groove
- annular relief groove 15a extending in the circumferential direction is formed in the lower portion on the inner side in the axial direction.
- a sacrificial anticorrosive material 80 made of zinc, aluminum, or an alloy containing 50% by weight of zinc and aluminum, which has a higher ionization tendency than iron, which is the base material of the rim base 10 and the lock ring 30, is buried in the escape groove 15a by thermal spraying. ing.
- the escape groove 15a is preferably formed by rolling a strip-shaped steel plate corresponding to the gutter band portion 11 and then performing a cutting process.
- the sacrificial anticorrosive material 80 in contact with the water accumulated in the gap 70 is ionized and oxidized, so that ionization of iron that is a base material of the rim base 10 and the lock ring 30 is suppressed.
- fretting fatigue can be prevented from being accelerated by corrosion, and breakage due to cracks can be avoided over a long period of time.
- the lock ring 30 may vibrate greatly in the axial direction, and may approach the portion on the inner side of the lock groove 15 in the axial direction. Also, the lock ring 30 may move inward in the axial direction when the tire air pressure is released. However, since the sacrificial anticorrosive material 80 is accommodated in the escape groove 15a, damage due to the lock ring 30 can be avoided.
- the escape groove 15a is formed in the vicinity of the first receiving surface, farther from the bottom than in FIG. 1A. Others are the same as in FIG. In the embodiment shown in FIG. 1C, a relief groove 15a is formed at the bottom of the inner surface of the lock ring groove 15, and a sacrificial anticorrosive metal 80 is embedded therein. Others are the same as in FIG.
- a relief groove 35a is formed in the axially inner surface region of the outer surface of the protrusion 35 of the lock ring 30, and a sacrificial anticorrosive material 80 is embedded in the relief groove 35a.
- the sacrificial anticorrosive material 80 faces the gap 70.
- the escape groove 35 a is formed at the bottom of the ridge 35, farther from the top of the ridge 35 than in FIG. 2A. Others are the same as in FIG.
- a relief groove 35a is formed at the top of the outer surface of the protrusion 35 of the lock ring 30 (the part facing the bottom of the inner surface of the lock ring groove 15), and the sacrificial anticorrosive material 80 is formed in this relief groove 35a. Is buried. Others are the same as in FIG.
- no escape groove is formed on the inner surface of the lock ring groove 15.
- the axially outer portion of the inner surface of the lock ring groove 15 and the axially outer portion of the outer surface of the protrusion 35 of the lock ring 30 have the same surface shape, thereby ensuring a contact region R3.
- the axially inner portion of the inner surface of the lock ring groove 15 and the axially inner portion of the outer surface of the protrusion 35 do not coincide with each other.
- the lock ring 30 In the normal state, the lock ring 30 is positioned on the outer side in the axial direction as shown in FIG. 3A. However, when the tire air pressure is released, the lock ring 30 may move inward in the axial direction as shown in FIG. 3B. However, even if it moves inward in the axial direction as much as possible, the axially inner portion of the inner surface of the lock ring groove 15 and the axially inner portion of the outer surface of the protrusion 35 of the lock ring 30 are separated from each other. The bottom of the inner surface of the lock ring 30 and the top of the outer surface of the lock ring 30 are also spaced apart. In this way, the surface region where the inner surface of the lock ring groove 15 and the outer surface of the protrusion 35 of the lock ring 30 are always spaced apart from each other is denoted by reference symbol R0 '.
- a sacrificial anticorrosive material 80 is provided on the inner surface of the lock ring groove 15 by thermal spraying or the like.
- the sacrificial anticorrosive material 80 fills part or all of the gap between the inner surface of the lock ring groove 15 and the outer surface of the protrusion 35 of the lock ring 30 in the state shown in FIG. 3B.
- the sacrificial anticorrosive material 80 faces the gap 70.
- the sacrificial anticorrosive material 80 may be provided only on the inner side in the axial direction on the inner surface of the lock ring groove 15 or only on the bottom.
- the shape of the protrusion 35 of the lock ring groove 15 and the lock ring 30 is the same as that of the embodiment of FIGS. 3A and 3B.
- the sacrificial anticorrosive material 80 is provided on the outer surface of the protrusion 35 in the surface region R0 ′.
- the sacrificial anticorrosive material 80 fills part or all of the gap between the inner surface of the lock ring groove 15 and the outer surface of the protrusion 35 of the lock ring 30 in the state shown in FIG. 4B.
- the sacrificial anticorrosive material 80 faces the gap 70.
- the sacrificial anticorrosive material 80 may be provided only on the axially inner side of the outer surface of the ridge 35 or only on the top.
- a sacrificial anticorrosive material may be provided on the entire inner surface of the lock ring groove 15 or the outer surface of the protrusion 35. A part of the sacrificial anticorrosive material may be peeled off by the movement of the lock ring 35 in the axial direction when the tire air pressure is released, but the remaining sacrificial anticorrosive material is maintained.
- a relief groove 37a is formed in the first contact surface 37 of the lock ring 35, and a sacrificial anticorrosive material 80 is embedded in the relief groove 37a.
- a relief groove 17a is formed in the first receiving surface 17 of the gutter band portion 11, and a sacrificial anticorrosive material 80 is embedded in the relief groove 17a.
- the sacrificial anticorrosive material may be formed by plating.
- the sacrificial anticorrosive material may be composed of a rod, a wire, a strip, or the like made of zinc, aluminum, or an alloy of zinc and aluminum, and embedded in the escape groove.
- the sacrificial anticorrosive material may be constituted by containing the above-mentioned metal in the resin, and may be applied to the escape groove or applied to the inner surface of the lock ring groove or the outer surface of the protrusion of the lock ring.
- the sacrificial anticorrosive material containing this resin can be easily applied to a multi-piece rim structure at the time of tire replacement or tire detachment for maintenance.
- a sacrificial anticorrosive material may be provided, and a hardened layer may be formed on the inner surface of the lock ring groove by induction hardening, ion nitriding treatment, or the like.
- the present invention can be applied to a multi-piece rim structure of a wheel of a large vehicle.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Tires In General (AREA)
- Prevention Of Electric Corrosion (AREA)
Abstract
Description
上記リムベース10は、軸方向の一方側にガターバンド部11を有し、他方側にバックフランジ部12を有している。
なお、上記ビードシートリング20の嵌め込みに先立ってガターバンド部11のシールリング溝16(後述する)にOリングからなるシールリング60を嵌め込む。このシールリング60は、ビードシートリング20とガターバンド部11との間をシールするためのものである。
特に面接触領域R3では、応力集中が顕著なため腐食と摩耗により上記フレッティング疲労が促進され、亀裂100の成長が早められる。
また、本出願人は特許文献2に開示されているように、ガターバンド部のロックリング溝の内面及び第1、第2の受面にイオン窒化処理による硬化層を形成することも提案している。
特許文献2の硬化層は耐フレッティング性を向上させるものの、腐食を防ぐことはできない。そのため、特に面接触領域R3において長期にわたりフレッティング疲労を抑制するのは困難である。
軸方向端部の外周に環状のロックリング溝を有するリムベースと、
上記リムベースの径方向外側に配置され、タイヤのビード部からの径方向および軸方向の荷重を受けるリング部材と、
内周に環状の突条を有し、この突条が上記ロックリング溝に嵌ることにより上記リムベースに装着され、上記リング部材からの径方向および軸方向の荷重を受けて上記リング部材を係止するロックリングと、
を備えたホイールの多片リム構造において、
上記リムベースと上記ロックリングの互いに対峙する面の少なくとも一方には、上記リムベースおよび上記ロックリングの母材よりイオン化傾向の大きな金属を含む犠牲防食材が設けられていることを特徴とする。
この構成によれば、ロックリングは車両走行中やタイヤのエア圧を抜く時であっても逃げ溝内の犠牲防食材はロックリングの影響を受けず、犠牲防食部材を長期にわたって保持することができる。
この構成によれば、水が溜まり易いロックリング溝の内面とロックリングの外面との間の隙間に犠牲防食材を露出させることができ、その結果犠牲防食材のイオン化を促進することにより、確実にロックリングとリムベースの面接触領域の腐食を抑制することができる。
この構成でも水が溜まり易いロックリング溝の内面とロックリングの外面との間の隙間に犠牲防食材を露出させることができ、確実にロックリングとリムベースの面接触領域の腐食を抑制することができる。
この構成によれば、逃げ溝を形成しなくても、走行中のロックリングの軸方向振れやタイヤのエア圧を抜く時の軸方向内側への移動に起因した犠牲防食材の剥離を抑制できる。また、水が溜まり易いロックリング溝の内面とロックリングの突条の外面との間の隙間に犠牲防食材を露出させることができ、確実にロックリングとリムベースの面接触領域の腐食を抑制することができる。なお、この構成は、ロックリングの突条の外面形状とロックリング溝の内面形状の不一致により得られる。
この構成によれば、逃げ溝を形成しなくても、走行中のロックリングの軸方向振れやタイヤのエア圧を抜く時の軸方向内側への移動に起因した犠牲防食材の剥離を抑制できる。また、水が溜まり易いロックリング溝の内面とロックリングの突条の外面との間の隙間に犠牲防食材を露出させることができ、確実にロックリングとリムベースの面接触領域の腐食を抑制することができる。
上記リムベースおよび上記ロックリングの母材が鉄からなり、上記犠牲防食材が、鉄よりイオン化傾向の大きな金属として、亜鉛、アルミニウムまたは亜鉛とアルミニウムの合金を含む。犠牲防食材は、溶射またはメッキされた上記金属で構成してもよいし、塗布された、樹脂と上記金属の混合物で構成してもよい。
図1Cに示す実施形態では、ロックリング溝15の内面の底部に逃げ溝15aが形成され、ここに犠牲防食金属80が埋設されている。他は図1Aと同様であるので、説明を省略する。
図2Cに示す実施形態では、ロックリング30の突条35の外面における頂部(ロックリング溝15の内面の底部に対峙する部位)に逃げ溝35aが形成され、この逃げ溝35aに犠牲防食材80が埋設されている。他は図2Aと同様であるので、説明を省略する。
図3A,図3Bの実施形態において、犠牲防食材80は、ロックリング溝15の内面において、軸方向内側の部位だけに設けてもよく底部だけに設けてもよい。
図4A,図4の実施形態において、犠牲防食材80は、突条35の外面の軸方向内側の部位だけ、または頂部だけに設けてもよい。
図5Bでは、ガターバンド部11の第1受面17に逃げ溝17aが形成され、この逃げ溝17aに犠牲防食材80が埋込まれている。
犠牲防食材をメッキにより形成してもよい。
犠牲防食材を、亜鉛、アルミまたは亜鉛とアルミの合金からなる棒、ワイヤ、帯材等により構成し、逃げ溝に埋め込んでもよい。
犠牲防食材を、上記金属を樹脂に含有させることにより構成し、逃げ溝に塗り込んだり、ロックリング溝の内面またはロックリングの突条の外面に塗布してもよい。この樹脂を含む犠牲防食材を用いれば、タイヤ交換時や、メンテナンスのためのタイヤ脱着時に、簡単に多片リム構造に塗ることができる。
犠牲防食材を設けるとともに、高周波焼き入れ、イオン窒化処理等によりロックリング溝の内面に硬化層を形成してもよい。
Claims (9)
- 軸方向端部の外周に環状のロックリング溝(15)を有するリムベース(10;10’;10”)と、
上記リムベースの径方向外側に配置され、タイヤのビード部からの径方向および軸方向の荷重を受けるリング部材(5;20)と、
内周に環状の突条(35)を有し、この突条が上記ロックリング溝(15)に嵌ることにより上記リムベースに装着され、上記リング部材(5;20)からの径方向および軸方向の荷重を受けて上記リング部材を係止するロックリング(30)と、
を備えたホイールの多片リム構造において、
上記リムベース(10;10’;10”)と上記ロックリング(30)の互いに対峙する面の少なくとも一方には、上記リムベースおよび上記ロックリングの母材よりイオン化傾向の大きな金属を含む犠牲防食材(80)が設けられていることを特徴とするホイールの多片リム構造。 - 上記リムベース(10;10’;10”)と上記ロックリング(30)の互いに対峙する面の少なくとも一方には、周方向に延びる逃げ溝(15a;17a;35a;37a)が形成され、この逃げ溝内に上記犠牲防食材(80)が設けられていることを特徴とする請求項1に記載のホイールの多片リム構造。
- 上記ロックリング溝(15)の内面における軸方向内側の部位及び/又は底部に、上記逃げ溝(15a)が形成されていることを特徴とする請求項2に記載のホイールの多片リム構造。
- 上記ロックリング(30)の突条(35)の外面における軸方向内側の部位及び/又は頂部に、上記逃げ溝(35a)が形成されていることを特徴とする請求項2に記載のホイールの多片リム構造。
- 上記ロックリング溝(15)と上記ロックリング(30)の突条(35)との間には軸方向に遊びがあり、上記ロックリングが最大限軸方向内側に位置した状態でも、上記ロックリング溝の内面における軸方向内側の部位と、上記ロックリングの突条の外面における軸方向内側の部位が、互いに離間しており、
上記ロックリング溝の内面における軸方向内側の部位と、上記ロックリングの突条の外面における軸方向内側の部位の少なくとも一方に、上記犠牲防食材(80)が設けられていることを特徴とする請求項1に記載のホイールの多片リム構造。 - 上記ロックリング溝(15)の内面における底部と、上記ロックリング(30)の突条(35)の外面における頂部が、互いに離間しており、
上記ロックリング溝の内面における底部と、上記ロックリングの突条の外面における頂部の少なくとも一方に、上記犠牲防食材(80)が設けられていることを特徴とする請求項1に記載のホイールの多片リム構造。 - 上記リムベース(10;10’;10”)および上記ロックリング(30)の母材が鉄からなり、
上記犠牲防食材が、鉄よりイオン化傾向の大きな金属として、亜鉛、アルミニウムまたは亜鉛とアルミニウムの合金を含むことを特徴とする請求項1に記載のホイールの多片リム構造。 - 上記犠牲防食材(80)が、溶射またはメッキされた上記金属で構成されていることを特徴とする請求項1に記載のホイールの多片リム構造。
- 上記犠牲防食材(80)が、塗布された、樹脂と上記金属の混合物で構成されていることを特徴とする請求項1に記載のホイールの多片リム構造。
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