WO2014021327A1

WO2014021327A1 - Sealing member for lock ring, and multi-piece rim using same

Info

Publication number: WO2014021327A1
Application number: PCT/JP2013/070625
Authority: WO
Inventors: 悦郎杉崎; ズルカイザムアスリビンカシムモハマド; 健太郎大庭
Original assignee: トピー工業株式会社
Priority date: 2012-08-01
Filing date: 2013-07-30
Publication date: 2014-02-06

Abstract

[Problem] To provide a lock ring sealing member with which gaps at the seam of the lock ring can be sealed reliably with the sealing member, thereby suppressing corrosion of a multi-piece rim, and with which deterioration or damage in the sealing member can easily be detected, and to provide a multi-piece rim using this lock ring sealing member. [Solution] An elastic sealing member (9) has a sealing member protrusion (9t), which is arranged and fitted into a lock ring groove (6) so as to fill a seam (8) in a lock ring (2). The sealing member is attached to a multi-piece rim (10), which has: a gutter band (1) having the lock ring groove (6); the lock ring (2), which is fitted into the lock ring groove and has seams (8) in one or more locations in the circumferential direction; and a bead seat band (3), which is fitted to the outer circumferential side of the gutter band and receives axial-direction force from the lock ring. In a cross section of the multi-piece rim in the radial direction, in the uncompressed state before the sealing member protrusion is inserted into the seam, the height H₁ of the sealing member protrusion from the surface making contact with the outer circumferential surface (1a) of the gutter band is less than the depth H₀ of the lock ring groove from the outer circumferential surface of the gutter band.

Description

Seal material for lock ring and multi-piece rim using the same

The present invention relates to a seal material used for a lock ring of a multi-piece rim attached to a large tire such as a construction machine or a mining machine, and a multi-piece rim using the same.

A large tire for a large construction machine or mining machine is different in rigidity from a tire for a passenger car, and therefore a single-piece rim often does not contain a tire. Therefore, a so-called multi-piece rim that can separate a cylindrical rim base and side rings at both ends thereof is used as a wheel attached to such a large tire. As this multi-piece rim, (1) a so-called rim wheel of a type in which a rim base is inserted into an outer surface of a hub on the vehicle side, and a multi-piece rim is attached to a vehicle with a wedge ring interposed between the rim base and the hub. (2) A so-called disc wheel of a type in which a disc portion protruding radially inward is formed on the inner surface of the rim base and this disc portion is attached to a hub on the vehicle side is used.
FIG. 7 shows the structure of a conventional multi-piece rim. 7, the multi-piece rim includes a gutter band 1 having a lock ring groove 6 and an O ring groove 7, and a lock ring having one cut 8 (see FIG. 8) in the circumferential direction fitted in the lock ring groove 6. 2, a bead seat band 3 that is fitted on the outer peripheral side of the gutter band 1 and receives axial force by the lock ring 2, and a side that is fitted inside the bead seat band 3 in the axial direction and receives axial force by the bead seat band 3. The ring 4 and the O-ring 5 disposed in the O-ring groove 7 are included.
However, as shown in FIG. 8, in the multi-piece rim having the conventional structure, moisture and foreign matter flow into the lock ring groove 6 from the gap formed in the cut 8 of the lock ring 2, and the surface of the lock ring groove is corroded and worn. There is a problem that arises. When pits are generated due to corrosion of the lock ring groove 6, fatigue cracks and stress corrosion cracks occur in the vicinity of the lock ring groove 6 when a load due to tire internal pressure is generated in the lock ring groove 6.

For this reason, as shown in FIG. 8, a sealing material 90 having the same cross-sectional shape as that of the lock ring 2 and having elasticity is arranged so as to fill the cut 8 of the lock ring, and further the sealing material. A technique for covering 90 with a cover 91 and fixing the cover 90 to a lock ring has been developed (Patent Document 1).

JP 7-257102 A (Claim 1, paragraph 0007, FIG. 1)

However, in the case of the above-described prior art, the cross-sectional shape of the seal material 90 is the same as the cross-sectional shape of the lock ring 2, but when the lock ring 2 expands due to fluctuations in tire pressure during use, the seal material 90 There is a problem that it is not in close contact with 2 and the sealing performance is lowered. In this technique, a cover is attached in order to prevent the sealing material 90 from falling off when the lock ring 2 expands as described above. However, since the sealing material 90 cannot be directly visually recognized, There is a problem that inspection of deterioration and damage is not easy.
Accordingly, the present invention is a seal material for a lock ring that can reliably check the deterioration and damage of the seal material while visually sealing the gap of the cut of the lock ring with a seal material to suppress the corrosion of the multi-piece rim, And a multi-piece rim using the same.

In order to solve the above problems, a sealing material for a lock ring of the present invention includes a gutter band having a lock ring groove, a lock ring fitted in the lock ring groove and having one or more cuts in the circumferential direction, and the gutter band. Is attached to a multi-piece rim having a bead seat band that receives an axial force received by the lock ring, and is arranged so as to fill the cut of the lock ring, and is fitted in the lock ring groove A sealing material having a sealing material convex portion and having elasticity, a surface in contact with an outer peripheral surface of the gutter band in a non-compressed state before being arranged in the cut in the radial section of the multi-piece rim The height of the convex part of the sealing material from the lower is smaller than the depth of the lock ring groove from the outer peripheral surface of the gutter band.
According to this lock ring sealing material, when the sealing material is installed in the lock ring groove, the convex portion of the sealing material hits the bottom of the lock ring groove, and the sealing material does not elastically repel, and the sealing material is removed from the lock ring groove. It can be prevented from jumping out and falling off.
In addition, the gap between the cuts of the lock ring is reliably sealed with a sealing material to suppress the corrosion of the multi-piece rim, and it is not necessary to cover and hold the sealing material with a cover or the like. Can be easily checked.

In the radial cross section of the multi-piece rim and in the outer shape of the sealing material in an uncompressed state before being arranged in the cut, the axial width of the sealing material convex portion is the axial direction of the lock ring groove. When the seal material convex portion is fitted in the lock ring groove in the non-compressed state with a width greater than or equal to the width, the contact surface of the seal material with the bead seat band is set with a tire to lock the axial force. You may be located in an axial direction inner side rather than the contact surface with the said bead seat band when received by the ring.
According to this lock ring sealing material, the contact surface of the compressed sealing material with the bead seat band is crushed by being pressed outward in the axial direction by the contact surface with the bead seat band, and is in close contact with the bead seat band. . Therefore, the compressed sealing material seals the contact surface with the bead seat band in addition to the lower surface of the gutter band being in close contact with the outer peripheral surface of the gutter band, and further sealing the cut of the lock ring in the circumferential direction. In addition, since all the moisture intrusion paths from the cut are sealed, corrosion of the lock ring groove can be reliably prevented.

The circumferential width of the sealing material in the uncompressed state may be wider than the circumferential width of the cut when the tire is set and the lock ring is most contracted.
According to this lock ring sealing material, when the diameter of the lock ring is reduced, the sealing material can be reliably compressed in the circumferential direction and expanded in a direction perpendicular to the circumferential direction (radial direction of the multi-piece rim). For this reason, the swelled sealing material adheres more strongly to the outer peripheral surface and the cut, and the sealing performance is further improved.

The multi-piece rim of the present invention includes a gutter band having a lock ring groove, a lock ring fitted in the lock ring groove and having one or more cuts in the circumferential direction, and an axial force fitted on the outer peripheral side of the gutter band. A bead seat band that is received by the lock ring, and a resilient sealing material that is disposed so as to fill the cut of the lock ring and has a sealing material convex portion that is fitted into the lock ring groove. The seal material for a lock ring according to claims 1 to 3 is used as the seal material.

When the multi-piece rim of the present invention further includes a retainer for joining the cut of the lock ring in the circumferential direction and further preventing an accident due to detachment of the lock ring when the tire is punctured, the shaft of the seal material The outer surface in the direction may be in contact with the inner surface in the axial direction of the retainer.
According to this multi-piece rim, the seal material is held by the retainer, and it is possible to prevent the seal material from falling off due to vibration or the like when the multi-piece rim is used. Further, since the retainer covers only the outer surface of the seal material in the axial direction and the upper surface of the seal material is exposed, there is no change in that the seal material can be easily inspected for deterioration or damage visually.

According to this invention, the gap of the cut of the lock ring is reliably sealed with the sealing material to suppress the corrosion of the multi-piece rim, and the deterioration and damage of the sealing material can be easily inspected visually.

It is sectional drawing which shows the sealing material for lock rings which concerns on embodiment of this invention, and a multi-piece rim. It is a partial expanded sectional view of FIG. It is a perspective view which shows the state with which the sealing material was mounted | worn with the cut | interruption of the lock ring. It is a figure which shows the state by which the lock ring reduced in diameter and the sealing material was compressed in the circumferential direction. It is a perspective view which shows the state which attached the retainer to the lock ring. It is a figure which shows the lock ring 2 which has two or more cut | interruptions in the circumferential direction. It is sectional drawing which shows the structure of the conventional multi-piece rim. It is a perspective view which shows the state which mounted | wore the conventional multi-piece rim with the sealing material.

Hereinafter, embodiments of the present invention will be described.
FIG. 1 is a cross-sectional view showing a lock ring sealing material 9 (9x) and a multi-piece rim 10 to which the lock ring sealing material 9 (9x) is attached according to an embodiment of the present invention, and FIG. It is the elements on larger scale of FIG. 1 which shows the sealing material 9 (9x) for water.
In the present invention, “axial direction” and “circumferential direction” refer to the axial direction and the circumferential direction of the multi-piece rim 10, respectively. The “axially outer side” refers to the side away from the axial center position of the tire set on the multi-piece rim 10 in the axial direction, and the “axially inner side” refers to the side of the tire described above along the axial direction. The side closer to the center position. For example, the outer tire of a double tire is fixed to the multi-piece rim at both ends in the axial direction, but “the outer side in the axial direction” is a direction in which the pair of multi-piece rims are separated in the axial direction.
In the present invention, the multi-piece rim is of the type that (1) the rim base is inserted into the outer surface of the hub on the vehicle side, and the multi-piece rim is attached to the vehicle with a wedge ring interposed between the rim base and the hub. The present invention can be applied to both a so-called rim wheel and (2) a so-called disk wheel of a type in which a disk portion protruding radially inward is formed on the inner surface of the rim base and the disk portion is attached to a hub on the vehicle side.

The multi-piece rim 10 includes a gutter band 1 having a lock ring groove 6 and an O ring groove 7, and one or more cuts 8 in the circumferential direction to be fitted in the lock ring groove 6 (see FIG. 3, the cut 8 in FIG. 1), a bead seat band 3 that is fitted inside the lock ring 2 in the axial direction on the outer periphery of the gutter band 1 and receives an axial force by the lock ring 2, and an axial direction of the bead seat band 3 It has a side ring 4 that is fitted inside and receives axial force by the bead seat band 3, an O-ring 5 that is disposed in the O-ring groove 7, and an elastic sealing material 9. A tire 30 is mounted between the bead seat band 3 and the side ring 4.
The sealing material 9 can be formed from a material having elasticity, for example, rubber, synthetic resin or the like. The seal material 9 has a seal material convex portion 9t fitted in the lock ring groove 6, and is disposed so as to fill a circumferential gap formed in the cut 8 of the lock ring as shown in FIG. In the following description, the seal material in an uncompressed state before being placed in the cut 8 is denoted by reference numeral “9”. Further, the seal material is arranged at the cut line 8, the tire 30 is set, the lock ring 2 is most contracted in diameter, and the cut material is compressed most closely in the circumferential direction by the code "9x". write.

As shown in FIG. 2, the outer shape of the sealing material 9 in the radial cross section of the multi-piece rim in an uncompressed state is substantially T-shaped with the sealing material convex portion 9t facing downward. Further, the upper corner portion of the sealing material 9 on the bead seat band 3 side is cut obliquely to form a surface substantially parallel to the bead seat band 3, thereby forming a contact surface 9 a with the bead seat band 3. The lower surface 9s of the sealing material 9 (the surface on which the convex portion 9t extends) is flat and is in close contact with the outer peripheral surface 1a of the gutter band 1 for sealing.
Here, the lower surface of the sealing member 9 9s (i.e., surface contacting the outer peripheral surface 1a of the gutter band 1) height of the sealing member protrusion 9t from (distance) H _1, the lock ring from the outer peripheral surface 1a of the gutter band 1 The depth 6 of the groove 6 is smaller than ₀ . Here, H ₁ is the distance to the tip of the seal material convex portion 9 t, and H ₀ is the maximum depth of the lock ring groove 6.
In addition, it is preferable to make the contact surface 9a parallel or substantially parallel to a contact surface 3a, which will be described later, because the contact area with the contact surface 3a increases.

Furthermore, the axial width W ₁ of the seal material convex portion 9t is equal to or greater than the axial width W _{0 of the} lock ring groove 6 to which the seal material convex portion 9t is attached. Preferably, the width W ₁ is equal to the width W _1. Wide than _zero . Further, the contact surface 9a of the seal material 9 when the seal material convex portion 9t is fitted in the lock ring groove 6 is the bead seat band 3 when the tire is set and the axial force is received by the lock ring 2. It is located on the inner side in the axial direction than the contact surface 3a.
When the seal material convex portion 9t is fitted in the lock ring groove 6 and no extra force is applied in the axial direction, the axial distance d between the seal material convex portion 9t and the lock ring groove 6 is inward and outward in the axial direction. It will be the same. Here, the width d refers to the maximum value when measured from the outer peripheral surface 1 a toward the depth direction of the lock ring groove 6. The widths W ₁ and W ₀ are values at the position closest to the outer peripheral surface 1a in the width d described above. Since the lock ring groove 6 normally has a narrow axial width in the depth direction, “the position of the width d closest to the outer peripheral surface 1 a” reflects the maximum axial width of the lock ring groove 6. It is.

Further, as shown in FIGS. 3 and 4, the width W _D of the circumferential direction of the seal member 9 in the uncompressed state, the cut 8 when the tire lock ring 2 is set to the most reduced diameter circumferential direction of the It is larger than the width W _XD . Furthermore, the width W _D, the circumferential direction of the smaller width W _f of the incision 8 in a state where no load is applied in the circumferential direction of the lock ring 2.
Then, as shown in FIG. 3, the seal material 9 is inserted into the cut 8 of the lock ring, and the seal material convex portion 9 t is fitted into the lock ring groove 6. At this time, since H ₀ > H ₁ , when the seal material 9 is attached to the lock ring groove 6, the seal material convex portion 9t does not hit the bottom of the lock ring groove 6 and the seal material 9 does not elastically repel, It is possible to prevent the sealing material 9 from jumping out of the lock ring groove 6 and falling off. Further, by setting W ₁ ≧ W ₀ , when the seal material 9 is mounted, the seal material convex portion 9t expands and is locked in the lock ring groove 6 by its own elastic force, so that the seal material 9 falls off. Can be prevented.
Further, when the tire 30 is set, the lock ring 6 is reduced in diameter by receiving an axially outward force of the bead seat band 3 and the circumferential width of the cut 8 becomes W _XD . Therefore, the sealing material 9 is compressed in the circumferential direction, swells in a direction perpendicular to the circumferential direction (radial direction of the multi-piece rim), and becomes a compressed sealing material 9x (from the outer shape of the sealing material 9 in FIG. 2 to the sealing material) (See arrow to 9x outline).
More preferably, if less than the height also H ₀ of the convex portion 9xt of sealant 9x after compression, that protrusion 9xt after compression to fall off by being pressed by the bottom of the lock ring groove 6 pops out sealant 9x This can be further prevented, and the sealing material 9x can be securely held in the lock ring groove 6.

Further, as described above, since the contact surface 9a of the seal material 9 before compression is positioned axially inward from the contact surface 3a, the contact surface 9xa of the seal material 9x after compression is as shown in FIG. The bead seat band 3 (the contact surface 3a) is pressed outward in the axial direction and crushed, and is in close contact with the contact surface 3a. Therefore, the compressed sealing material 9x seals the contact surface 3a in addition to the lower surface of the sealing member 9x being in close contact with the outer peripheral surface 1a of the gutter band 1, and further, the cut 8 of the lock ring 2 in the circumferential direction. Sealing and sealing all the moisture intrusion paths from the cuts 8 can reliably prevent the lock ring groove 6 from being corroded.
If W _D > W _XD , when the lock ring 2 is reduced in diameter, the sealing material 9 may be reliably compressed in the circumferential direction and expanded in the direction perpendicular to the circumferential direction (the radial direction of the multi-piece rim). Yes (see symbol 9x in FIG. 4). For this reason, the swelled sealing material 9x adheres more strongly to the outer peripheral surface 1a, the contact surface 3a, and the cut 8, and the sealing performance is further improved.
Furthermore, W by the D _<W _f, when no load is applied in the circumferential direction of the lock ring 2, it is possible to easily insert the sealing member 9 to the cut 8 of the lock ring (see Figure 3).

Further, in the present invention, the sealing material 9x is compressed in the circumferential direction and swells in the radial direction of the multi-piece rim, and is securely sandwiched between the cut 8, the bead seat band 3 and the gutter band 1, so that the sealing material 9x It is not necessary to cover and hold the cover with a cover or the like, and the deterioration and damage of the sealing material can be easily inspected visually.
Furthermore, since it is not necessary to make the outer shape of the sealing material 9 in the uncompressed state the same as the cross-sectional shape of the lock ring 2, for example, as shown in FIG. 2, the sealing material 9 has a simple T-shaped cross-sectional shape. This can reduce the manufacturing cost of the sealing material 9. Further, by making the cross-sectional area of the sealing material 9 smaller than the cross-sectional area of the lock ring 2, the amount of material used for the sealing material 9 can also be reduced.
In addition, as long as the sealing material 9x seals the intrusion path (the outer peripheral surface 1a, the contact surface 3a, and the cut 8) of moisture and foreign matters from the cut 8, the other portions are cross sections of the lock ring 2 as shown in FIG. Although it may be smaller than the shape, there may be a portion that protrudes from the cross-sectional shape of the lock ring 2, such as a tip portion 9 xb on the inner side in the axial direction of the sealing material 9 x.

As shown in FIG. 5, the multi-piece rim 10 of the present invention may further include a retainer 20 that joins the cut 8 of the lock ring 2 in the circumferential direction. The retainer 20 is formed in a long side shape, and bolt

holes

21 and 23 are opened along the longitudinal direction. Then, the retainer 20 is arranged in contact with the outer surface in the axial direction of the lock ring 2 so as to connect the cuts 8 (both ends in the circumferential direction) of the lock ring 2, and the

bolts

21 and 23 are locked across the cuts 8. The slit 8 can be held by the retainer 20 by being inserted into the ring 2 and screwed. In addition, since the bolt hole 23 is an ellipse long in the longitudinal direction, the bolt hole 23 can be inserted according to the change in the interval of the cuts 8.
Here, when the axially outer surface 9xe of the sealing material 9x is brought into contact with the axially inner surface of the retainer 20, the sealing material 9x is held by the retainer 20, and the sealing material is caused by vibration or the like when the multi-piece rim 10 is used. 9x can be prevented from falling off. Further, the retainer 20 covers only the axially outer surface 9xe of the sealing material 9x, and the upper surface of the sealing material 9x is exposed, so that the deterioration and damage of the sealing material can be easily inspected visually.

It goes without saying that the present invention is not limited to the above-described embodiment, but extends to various modifications and equivalents included in the spirit and scope of the present invention.
For example, in the above embodiment, the lock ring has one cut in the circumferential direction, but the lock ring has two or more cuts in the circumferential direction as described in International Publication No. 2008/099775. You may have.
As shown in FIG. 6, when the lock ring 2 has two or more cuts 8 in the circumferential direction, the lock ring is divided into two or

more parts

2x, 2y in the circumferential direction, and each part 2x It is possible to adopt a form in which one end of 2y is connected by a connecting member 40 having flexibility. In this case, the lock ring 2 is reduced by connecting the lock ring with the connecting member 40 instead of the retainer at the second and subsequent cuts except for one cut, loosely fitting the gutter band, and then applying internal pressure to the tire. Can be attached to the gutter band. And the retainer 20 may be attached to the lock ring 2 from the outside of the sealing material at one cut where the lock ring is not connected. Thus, even when the lock ring has two or more cuts in the circumferential direction, the lock ring sealing material of the present invention is divided into portions in which the lock ring is divided in the circumferential direction so as not to interfere with the connecting member. It is interposed in the gap 8 between the adjacent end portions of 2x and 2y.
In the example of FIG. 6, the connecting member 40 is a wire, and the bolts 44 are inserted into ring portions (washers) 43 at both ends of the connecting member 40 to connect the

portions

2x and 2y. Not limited.

DESCRIPTION OF SYMBOLS 1 Gutter band 1a Outer surface of gutter band 2 Lock ring 3 Bead seat band 3a Contact surface with bead seat band seal material 6 Lock ring groove 8 Notch 9 Seal material for lock ring in non-compressed state 9x Lock ring seal after compression Material 9t, 9xt Seal material convex portion 9a Contact surface of seal material with bead seat band 10 Multi-piece rim 20 Retainer H ₀ Depth of lock ring groove H ₁ Height of seal material convex portion W ₀ Shaft of lock ring groove width in the circumferential direction of the cut when the width W _XD locking ring in the circumferential direction of the sealing material in the width W _D uncompressed state in the axial direction of the width W ₁ the sealing material projections of direction is most reduced diameter

Claims

A gutter band having a lock ring groove;
A lock ring fitted in the lock ring groove and having one or more cuts in the circumferential direction;
Attached to a multi-piece rim having a bead seat band that is fitted to the outer peripheral side of the gutter band and receives an axial force by the lock ring;
An elastic sealing material that is disposed so as to fill the cut of the lock ring and has a sealing material convex portion that is fitted into the lock ring groove,
In the radial cross section of the multi-piece rim, the height of the convex portion of the seal material from the surface in contact with the outer peripheral surface of the gutter band in an uncompressed state before being arranged in the cut is from the outer peripheral surface of the gutter band. The lock ring sealing material is smaller than the depth of the lock ring groove.
In the radial cross section of the multi-piece rim and in the outer shape of the sealing material in an uncompressed state before being arranged in the cut, the axial width of the sealing material convex portion is the axial direction of the lock ring groove. More than width,
When the seal material convex portion is fitted in the lock ring groove in the non-compressed state, the tire is set on the contact surface of the seal material with the bead seat band, and the axial force is received by the lock ring. 2. The seal material for a lock ring according to claim 1, wherein the seal material is located on an inner side in an axial direction than a contact surface with the bead seat band.
The circumferential width of the sealing material in the uncompressed state is wider than the circumferential width of the cut when the tire is set and the lock ring is most contracted in diameter. The sealing material for a lock ring as described.
A gutter band having a lock ring groove;
A lock ring fitted in the lock ring groove and having one or more cuts in the circumferential direction;
A bead seat band that is fitted to the outer peripheral side of the gutter band and receives axial force by the lock ring;
A multi-piece rim having a sealing material that is arranged so as to fill the cut of the locking ring and has a sealing material convex part fitted in the locking ring groove,
A multi-piece rim in which the seal material for a lock ring according to claims 1 to 3 is used as the seal material.
A retainer for joining the cut of the lock ring in the circumferential direction;
The multi-piece rim according to claim 4, wherein an axially outer surface of the sealing material is in contact with an axially inner surface of the retainer.