JP2007326383A - Air injection valve and vehicle wheel assembly - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To secure an air reinjection path in a lateral-fitting and run-flat type wheel assembly. <P>SOLUTION: The wheel assembly is provided with a wheel A, an air injection valve 40 fitted to a rim body 11 of the wheel A, and a tire C and an annular core B for a run flat which are fitted to the outer periphery of the rim body 11. At one portion of the perimeter of the outer peripheral face of an approximately cylindrical intermediate region of the rim body 11, a storage recessed part 18 is provided. A head part 41 of the air injection valve 40 is stored in the storage recessed part 18, and a pipe part 42 of the air injection valve 40 penetrates through a bottom wall of the storage recessed part 18. A second air passage 44 of the head part 41 is continued approximately orthogonally to a first air passage 43 of the pipe part 42, and the tip of the second air passage 44 is opened on the outer peripheral face of the head part 41. Between a face portion where the tip of the second air passage 44 is opened and the inner peripheral face of the storage recessed part 18, a blow-out space 18x for blowing out air is formed, and is communicated with a space inside the tire C. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an improvement in the structure of an air injection valve that is mounted on a wheel of a vehicle and used to fill a tire with air, and further relates to an improvement in a wheel assembly of a vehicle equipped with the improved air injection valve.

As disclosed in Patent Document 1, a side-loading and run-flat type vehicle wheel assembly is known.
The lateral loading type refers to a structure in which a wheel can be loaded only by moving it in the axial direction without tilting the tire. In this structure, the rim of the wheel has a rim body and a side ring. A rim flange portion is formed on one peripheral portion of the rim body, and a side ring mounting portion is formed on the other peripheral edge. After the tire is loaded on the rim body, a side ring is attached to prevent the tire from falling off. When such a lateral loading type structure is adopted, the rim body does not have a rim drop portion for mounting a tire, and has a substantially cylindrical shape over a relatively wide area in the middle.

  The run-flat type is a structure that enables the vehicle to travel stably even when the tire air pressure decreases. In this structure, an annular core is mounted on the outer periphery of the rim so that the deformed tire is supported by the core when the air pressure drops. The core generally includes a buffer pad and a core body that is attached to the rim via the buffer pad.

In the horizontally loaded and run-flat type wheel assembly, interference between the air injection valve and the run-flat core becomes a problem. In the lateral loading type, the air injection valve is mounted on the cylinder of the rim body or an area close to the cylinder, so the head part (air blowing part) of the air injection valve protrudes from the outer peripheral surface of the rim body and interferes with the core buffer pad. It is.
For this reason, in Patent Document 1, annular grooves facing each other are formed in the outer periphery of the rim body and the inner periphery of the core buffer pad, and the head portion of the air injection valve is accommodated between these annular grooves.
Japanese Patent Laid-Open No. 10-21807

  However, in the above configuration, when the vehicle is driven when the air pressure is reduced, the buffer pad is deformed to block the air passage opening at the top surface of the head part, or the core is displaced in the rim width direction and the buffer pad is Since it rides on the top surface and blocks the air passage, it may be difficult to inject air again.

The present invention has been made to solve the above-described problems, and is an air injection device including a head portion disposed on the outer peripheral side of a rim of a vehicle wheel and a pipe portion that penetrates the rim and protrudes from the inner periphery of the rim. The valve is characterized in that the second air passage of the head portion is substantially orthogonal to the first air passage of the pipe portion, and a tip of the second air passage is open to an outer peripheral surface of the head portion.
According to this configuration, since the compressed air from the second air passage is blown from the outer peripheral surface rather than the top surface of the head portion, the buffer pad is used when used in a horizontally loaded type or run flat type wheel assembly. Even if it contacts the outer peripheral surface of the head portion, the second air passage of the head portion is not blocked, and an air injection path can be secured.

  Preferably, a plurality of the second air passages are formed. As a result, the air injection path can be more reliably maintained.

Further, the present invention is equipped with a wheel, an air injection valve having the above-described configuration attached to the rim of the wheel, a tire and an annular run-flat core attached to the outer periphery of the rim, and the rim includes: A rim body having a rim flange part on one peripheral part and a side ring attaching part on the other peripheral part, and a side ring attached to the side ring attaching part of the rim body, and the core is elastic In a vehicle wheel assembly including a buffer pad made of a material and a core body attached to the outer periphery of the rim body via the buffer pad, the outer peripheral surface of the intermediate region of the substantially cylindrical shape of the rim body is An accommodation recess is provided at one position of the entire circumference, the head portion of the air injection valve is accommodated in the accommodation recess of the rim body, and the tube portion of the air injection valve is the accommodation recess. Air protrudes from the inner periphery of the rim body through the bottom wall, and air is blown between the surface portion where the tip of the second air passage opens on the outer peripheral surface of the head portion and the inner peripheral surface of the housing recess. A blowout space is formed, and the blowout space communicates with a space inside the tire.
According to this structure, even if it contacts the top surface of the head portion of the air injection valve, the compressed air can be blown from the second air passage to the blowing space and filled into the tire without blocking the second air passage. .

Preferably, the housing recess is provided in the vicinity of one of the peripheral portions of the rim body, and the buffer pad of the core covers the housing recess and a part of the head portion of the air injection valve, and the blowing space However, it continues to the space inside the tire via a gap between the bead portion of the tire and the buffer pad.
According to this configuration, the compressed air blown into the blowing space can be filled into the tire through the gap between the tire bead portion and the buffer pad.

Preferably, the outer periphery of the rim body is formed with a communication groove extending in the circumferential direction and continuing to the blowing space of the housing recess, and the periphery of the buffer pad on the side of the housing recess is penetrating in the thickness direction of the buffer pad. A notch is formed, and this notch is continuous with the communication groove of the rim body.
According to this, even when the core is displaced in the width direction of the rim and there is no gap between the tire bead portion and the buffer pad, the compressed air blown into the blow-out space is compressed into the communication groove of the rim body and the buffer pad. The tire can be filled through the notches.
More preferably, the inner peripheral surface of the receiving recess of the rim has a pair of flat engaging surfaces extending in the rim width direction, and the outer peripheral surface of the head portion of the air injection valve also extends in the rim width direction. The head portion is prevented from rotating by having a flat engagement surface, and these engagement surfaces come into contact with each other, and two second air passages of the air injection valve are formed and extend substantially in the rim width direction. Two blowout spaces are formed between the inner circumferential surface of the housing recess and the outer circumferential surface of the head portion, corresponding to the two second air passages, and the two blowout spaces are arranged on the straight line. It is connected through a shallow notch adjacent to the locking surface, and the communication groove is connected to a blowing space closer to the bead portion of the tire. According to this, even if the head is prevented from rotating, the compressed air can be filled through the two second air passages and the two blowing spaces.

Preferably, a communication groove extending in the circumferential direction and continuous with the blowing space of the housing recess is formed on the inner periphery of the buffer pad, and the buffer pad has a peripheral edge on the housing recess side in the thickness direction of the buffer pad. A notch that penetrates is formed, and this notch is continuous with the communication groove of the buffer pad.
According to this, even when the core is displaced in the width direction of the rim and there is no gap between the tire bead portion and the cushion pad, the compressed air blown into the blow-out space is not cut into the communication groove and the notch of the buffer pad. It can be made to fill a tire via.

In one aspect of the present invention, the rim body includes a cylindrical member having the rim flange portion, a cylindrical member having the side ring mounting portion, and an intermediate cylindrical member disposed between the cylindrical members, Adjacent cylindrical members are welded to each other, and the intermediate cylindrical member has an outer peripheral surface that forms a cylindrical surface, and has a thick portion that protrudes toward the inner peripheral side over the entire circumference, and the above-described accommodation in the thick portion. A recess is formed.
As a result, the rim body can be easily manufactured while having a complicated cross-sectional shape.

In another aspect, a hole is formed in an intermediate region of the rim body, a peripheral portion of a closing plate that closes the hole is welded to an inner peripheral surface of the rim body, and the accommodation recess is formed by the hole and the closing plate. Has been.
According to this, it is not necessary to form a thick part over the entire circumference in the rim body in order to form the accommodating recess, and it is possible to reduce the weight and cost of the rim body.

In yet another aspect, a hole is formed in an intermediate region of the rim body, and the hole is closed with a closing member. The closing member has a bottom wall and an insertion portion that stands up from the bottom wall. The peripheral edge of the bottom wall protrudes from the outer peripheral surface of the insertion part, the insertion part of the closing member is inserted into the hole, and the peripheral part of the insertion part and the peripheral edge of the hole on the outer peripheral surface side of the rim body are welded. At the same time, the peripheral edge of the bottom wall and the inner peripheral surface of the rim main body are welded, and the receiving recess is formed in the insertion portion.
According to this, weight reduction and cost reduction of the rim body can be achieved, and fixing of the closing member to the rim body and airtightness between the two can be reliably obtained by welding at two locations.

  According to the present invention, an air injection path can be obtained reliably.

  Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows a main part of a vehicle wheel assembly. The wheel assembly includes a wheel A, a run-flat core B, and a tire C.

  The wheel A has a rim 10 and a disk 20. The rim 10 has a so-called lateral loading structure that can be mounted by moving the core B and the tire C along the central axis.

  Schematically describing the configuration of the laterally loaded rim 10, the rim 10 has a rim body 11 and a side ring 12. A rim flange portion 11a and a bead seat portion 11b adjacent to the rim flange portion 11a are formed on a peripheral portion on one side (left side in FIG. 1) of the rim body 11, and a peripheral portion (disc 20) on the other side (right side in FIG. 1). The side ring mounting portion 11c is formed on the peripheral edge of the outer peripheral edge of the welded portion.

  The rim body 11 does not include a rim drop as found in a normal wheel, and an intermediate region between the left and right peripheral portions has a cylindrical shape. In this intermediate region, the relatively narrow region 11x on the side of the side ring mounting portion 11c has a slightly smaller diameter than the relatively wide region 11y on the side of the rim flange portion 11a for positioning the buffer pad 32. It has the same diameter as 11c. The outer peripheral surfaces of these regions 11x and 11y form a smooth cylindrical surface. In addition, this area | region 11x may be the same diameter as the area | region 11y with the side ring mounting part 11c, and may be smaller diameter than the area | region 11y and the side ring mounting part 11c.

  The tire C is loaded from the right side of the rim body 11 in a state where the core B is accommodated. After this loading, the side ring 12 is mounted on the side ring mounting portion 11c of the rim body 11, and the lock ring 13 is further mounted to prevent the side ring 12 from coming off. A seal ring 14 is interposed between the outer periphery of the rim body 11 and the side ring 12.

  The side ring 12 has a rim flange portion 12a and a bead seat portion 12b. The bead portion of the tire C rides on the bead seat portions 11b and 12b and is locked to the rim flange portions 11a and 12a.

  The core B has an annular shape and has a rigid core body 31 and a buffer pad 32 made of an elastic material such as rubber. The core body 31 is formed by connecting a plurality of members, and the rim body 11 is tightened via the buffer pad 32. A wide and shallow annular recess 32a that accommodates the inner peripheral side of the core body 31 is formed on the outer peripheral surface of the buffer pad 32, thereby preventing lateral displacement between the two. The buffer pad 32 is in contact with the entire region 11y of the rim body 11 and the majority region of the region 11x.

Next, the structure of an air injection valve 40 (hereinafter simply referred to as a valve) and a special rim 10 on which the valve 40 is mounted will be described in detail.
As shown in FIG. 1, the valve 40 has a head portion 41 (air blowing portion) disposed on the outer peripheral side of the rim 10 and a tube portion 42 (air injection portion) that penetrates the rim 10.

  The head portion 41 of the valve 40 has a flat plate shape, and as shown in FIG. 4, the outer peripheral surface thereof has two locking surfaces 41a and two arcuate surfaces 41b extending in parallel with each other. Yes.

  As shown in FIG. 1, the tube portion 42 of the valve 40 is bent at an obtuse angle and has two straight portions 42a and 42b. The straight part 42 a on the head part 41 side is orthogonal to the head part 41.

  As shown in FIG. 2, the said pipe part 42 has the 1st air channel | path 43 covering the full length. The head portion 41 has a second air passage 44 that extends perpendicularly to the first air passage 43 and extends in the radial direction of the head portion 41. The distal end of the first air passage 43 opens at the distal end of the pipe portion 42 and is closed with a cap 45. A straight valve 42b is provided with a check valve.

  As shown in FIGS. 2 and 4, two second air passages 44 are formed starting from the first air passage 43 and arranged in a straight line. The tips of the second air passages 44 are open to two arcuate surfaces 41b of the head portion 41, respectively.

  Next, the structure of the rim 10 for mounting the valve 40 will be described. As shown in FIGS. 1 to 3, the rim body 11 is obtained by welding three cylindrical members 15, 16, and 17. In FIG. 2, the welded portion is indicated by reference numeral 11w.

  The left cylinder member 15 includes the rim flange portion 11a and the bead seat portion 11b described above, and has a middle region 11y having a large diameter and a part of a middle region 11x having a small diameter. The right cylinder member 17 has a side ring mounting portion 11c.

  The intermediate cylinder member 16 constitutes a large part of the intermediate region 11x having a small diameter, and has a thick portion 16a protruding toward the inner peripheral side. The outer peripheral surface of the intermediate cylindrical member 16 forms a smooth cylindrical surface and is flush with the adjacent portions of the left and right cylindrical members 15 and 17.

  As shown well in FIGS. 2 to 5, a housing recess 18 is formed on one of the entire circumferences of the outer peripheral surface of the thick portion 16 a of the cylindrical member 16. The head portion 41 of the valve 40 is housed in the housing recess 18. The depth of the accommodating recess 18 is substantially equal to the thickness of the head portion 41, so that the top surface of the head portion 41 is substantially flush with the outer peripheral surface of the tubular member 16.

The bottom wall of the housing recess 18 has a flat plate shape orthogonal to the radial direction of the rim body 11. In other words, the bottom surface of the housing recess 18 forms a flat surface orthogonal to the radial direction of the rim body 11.
A through hole 18 h is formed in the bottom wall of the housing recess 18, and the tube portion 42 of the valve 40 passes through the through hole 18 h and protrudes from the inner periphery of the rim 10. The straight portion 42 a of the pipe portion 42 is formed with a male screw. By tightening a nut 47 that is screwed into the male screw, the bottom wall of the housing recess 18 is secured by the head portion 41 and the nut 47 of the valve 40. It comes to pinch. Thereby, the air injection valve 40 is fixed.
A space between the bottom wall of the housing recess 18 and the head portion 41 of the valve 40 is sealed with an O-ring 45.

  As best shown in FIG. 4, the inner peripheral surface of the receiving recess 18 includes two locking surfaces 18 a that are parallel to each other and extend linearly in the rim width direction, and two arcuate surfaces 18 b. have. The interval between the two locking surfaces 18a is substantially the same as or slightly wider than the interval between the two locking surfaces 41a of the head portion 41 of the valve 40, and the rotation of the valve 40 is prevented by the contact between the locking surfaces 18a and 41a. Has been made.

  The interval between the two arcuate surfaces 18b of the accommodating recess 18 is wider than the interval between the two arcuate surfaces 41b of the head portion 41. Therefore, in the accommodated state of the head portion 41 in the accommodating recess 18, the space between the arcuate surfaces 18b and 41b. A blowout space 18x through which air is blown out is formed. The two blowing spaces 18x face each other in the rim width direction via the head portion 41.

  The housing recess 18 further has a shallow notch 18y adjacent to the locking surface 18b and having both ends connected to the pair of blowing spaces 18x.

  On the outer peripheral surface of the tubular member 16 of the rim main body 11, a groove 19 is formed over the entire circumference in the circumferential direction.

  In the normal mounting state of the core B, the buffer pad 32 partially covers the housing recess 18 and partially covers the head portion 41 in the housing state. The buffer pad 32 is in contact with the outer peripheral surface of the rim body 11 and is also in contact with the top surface of the head portion 41.

  A gap 50 is formed between the peripheral edge of the buffer pad 32 on the side of the side ring 12 and the side ring 12 and the bead portion of the tire C. The blowing space 18x on the side of the side ring 12 is not blocked by the buffer beads 32 and is open, and communicates with the internal space of the tire C through the gap 50.

Notches 32x are formed at the peripheral edge of the buffer pad 32 on the side ring 12 side at equal intervals in the circumferential direction, for example, at 60 ° intervals. These notches 32x are opened to the side ring 12 side and penetrate the buffer pad 32 in the thickness direction.
In the normal mounting state of the core B, it is preferable that one of the plurality of cutouts 32x correspond to the housing recess 18 of the rim body 11.

  In the present embodiment, a communication groove 32y that continues to the notch 32x is also formed on the inner peripheral surface of the buffer pad 32 over the entire circumference.

  The operation of the wheel assembly having the above configuration will be described. As described above, after the tire C and the core B are mounted on the rim 10 and the side ring 12 and the like are mounted, compressed air is injected from the tip of the pipe portion 42 of the valve 40. The injected compressed air passes through the first air passage 43 and the two second air passages 44 and is blown out to the two blowing spaces 18x.

  The compressed air blown into the blowing space 18x on one side (side ring 12 side) passes through the gap 50 between the side ring 12 side peripheral portion of the buffer pad 32 and the side ring 12 and the bead portion of the tire C, The tire C is filled. The compressed air blown into the blowout space 18x on the other side (opposite side of the side ring 12) passes through the notch 18y and further passes through the gap 50 to fill the tire C.

  In the state where the core B is in a normal wearing state and one of the cutouts 32x of the buffer pad 32 is in a position corresponding to the accommodation space 18, the compressed air blown into the blowout space 18x passes through the cutout 32x and the tire. C is filled.

  When the air pressure of the tire C decreases, the tire C is deformed by the vehicle weight. At this time, the core B attached to the rim 11 can take charge of the vehicle weight via the tire C, and the vehicle can be stably driven to a place where air can be injected.

  After running by the core B, the tire C is refilled with air. Although the buffer pad 32 may be deformed during the running, there is no problem in refilling the air. In the present embodiment, since the second air passage 44 of the head portion 41 opens not on the top surface of the head portion 41 but on the outer peripheral surface, the second air passage 44 is not blocked by the deformation of the buffer pad 32. This is because a compressed air injection path can be secured.

  Further, as shown in FIG. 6, when the core B is displaced in the axial direction of the rim 10, and the peripheral portion on the side ring 12 side of the buffer pad 32 hits the bead portion of the tire C or the side ring 12, The gap 50 (see FIG. 2) between the tire 32 and the tire C is eliminated. Further, the core B may be displaced in the circumferential direction, so that the notch 32x of the buffer pad 32 may not coincide with the accommodation space 18 of the rim 10.

  Even when the gap 50 disappears as described above, the compressed air blown into the blowing space 18x can be refilled into the tire C. The compressed air blown into the blow-out space 18x passes through the communication groove 19 formed on the outer periphery of the rim body 11 or the communication groove 32y formed on the inner peripheral surface of the buffer pad 32, and further passes through the notch 32x of the buffer pad 32 to the tire C. Because it can be filled

In the present embodiment, the rim body 11 is composed of three cylindrical members. The reason will be described. The rim body 11 requires a thick portion for forming the housing recess 18, but the left and right peripheral edge portions of the rim body 11 have a complicated cross-sectional shape. Therefore, if this thick portion is added, the rim body The overall cross-sectional shape increases complexity and is difficult to manufacture. Therefore, an intermediate region that requires the thick portion 16a is made a separate member from the left and right regions, resulting in three cylindrical members 15-17.
However, the rim body 11 may be constituted by one cylindrical member instead of the three cylindrical members 15-17. Moreover, you may comprise the area | region corresponded to the intermediate | middle cylinder member 16 and any one of the left and right cylinder members 15 and 17 by one cylinder member.

  Hereinafter, other embodiments of the present invention will be described with reference to the drawings. Constituent portions corresponding to the embodiments described earlier in these embodiments are denoted by the same reference numerals in the drawings, and detailed description thereof is omitted.

  In the second embodiment shown in FIGS. 7 to 9, the rim main body 11 is formed of one cylindrical member having a substantially uniform thickness. The housing recess 18 is defined by a hole 60 formed in the region 11 x of the rim body 11 and a closing plate 61 that closes the hole 60 from the inner peripheral side of the rim body 11. The closing plate 61 has a circular flat plate shape and its peripheral edge is welded to the inner peripheral surface of the rim body 11. The closing plate 61 constitutes the bottom wall of the housing recess 18 and provides a flat bottom surface for providing the head portion 41.

Also in the third embodiment shown in FIGS. 10 to 12, the rim body 11 is formed of one cylindrical member having a substantially uniform thickness. A circular hole 65 is formed in the region 11x of the rim body 11, and a socket 66 (blocking member) is inserted into the hole 65. The socket 66 has a bottom wall 66a and a low columnar insertion portion 66b standing up from the bottom wall 66a. The peripheral edge portion of the bottom wall 66a projects from the outer peripheral surface of the insertion portion 66b. With the insertion portion 66b of the socket 66 inserted, the peripheral edge portion of the bottom wall 66a is welded to the inner peripheral surface of the rim main body 11, and the peripheral portion of the insertion portion 66b is welded to the peripheral edge of the hole 65 in the outer peripheral surface of the rim main body 11. As a result, the socket 66 is fixed to the rim body 11.
In addition, although the protrusion part from the outer peripheral surface of the said insertion part 66b plays the role which makes insertion depth constant, it does not need to exist.

  The top surface of the insertion portion 66b is substantially flush with the outer peripheral surface of the region 11x of the rim body 11. The insertion portion 66 b is formed with an accommodation recess 18 and a short groove 66 x for connecting the accommodation recess 18 to the communication groove 19 of the rim body 11.

In the fourth embodiment shown in FIG. 13, the housing recess 18 is formed by pressing the rim body 11 made of one cylindrical member having a substantially uniform thickness.
In the fifth embodiment shown in FIG. 14, not only the second air passage 44 but also a third air passage 44 </ b> A that opens to the top surface of the head portion 41 is formed in the head portion 41. The third air passage 44 </ b> A is disposed on an extension line of the first air passage 43 and is orthogonal to the second air passage 44.

The present invention is not limited to the above embodiment, and various aspects can be adopted. For example, since the displacement of the core remains in a relatively small amount, the blow-out space 18x is not completely blocked by the buffer pad 32 even if the position shift occurs, and the gap 50 between the buffer pad 32 and the tire bead portion. Can be secured, the communication grooves 19, 32y and the notches 32x may be omitted. Further, only one of the communication grooves 19 and 32y may be formed.
The communication grooves 19 and 32y may not be provided on the entire circumference as long as it is greater than or equal to the interval between the plurality of notches 32x of the buffer pad.
The facing surfaces 18b and 41b that define the blowing space 18x may not be arcuate surfaces.
Further, the rotation prevention structure of the valve 40 may be omitted. In this case, the outer peripheral surface of the head portion 41 and the inner peripheral surface of the accommodating recess 18 may be separated over the entire circumference.
The housing recess 18 may be provided so as to be close to the rim flange portion 11 a on the opposite side of the side ring 12.
The second air passage may extend in one direction from the end of the first air passage and open at one place on the outer peripheral surface. In this case, the blowing space connected to the opening end of the second air passage may be formed only at one place.

It is sectional drawing which shows a part of vehicle wheel assembly with an air injection valve which makes 1st Embodiment of this invention. It is sectional drawing which expands and shows the principal part of the wheel assembly of the embodiment. It is sectional drawing which expands and shows the accommodation recessed part of the rim main body of the embodiment. It is a top view of the accommodation recessed part of the embodiment. It is sectional drawing of the accommodation recessed part which follows the VV line in FIG. FIG. 3 is a view corresponding to FIG. 2 showing a state in which the core is displaced in the circumferential direction and the axial direction of the wheel in the same embodiment. It is a principal part expanded sectional view of the wheel assembly which makes 2nd Embodiment of this invention. It is a top view of the accommodation recessed part of the 2nd embodiment. It is sectional drawing of the accommodation recessed part in alignment with the IX-IX line in FIG. It is a principal part expanded sectional view of the wheel assembly which makes 3rd Embodiment of this invention. It is a top view of the accommodation recessed part of the same 3rd embodiment. It is sectional drawing of the accommodation recessed part which follows the XII-XII line | wire in FIG. It is an expanded sectional view of the accommodation crevice which makes a 4th embodiment of the present invention. It is a longitudinal cross-sectional view of the valve | bulb which makes 5th Embodiment of this invention.

Explanation of symbols

A Wheel B Core C Tire 10 Rim 11 Rim main body 11a Rim flange portion 11x, 11y Region 12 having an intermediate cylindrical shape Side ring 15-17 Cylindrical portion 16a Thick wall portion 18 Recessed portion 18a Locking surface 18x Outlet space 18y Notch 19 Communication groove 31 Core body 32 Buffer pad 32x Notch 32y Communication groove 40 Air injection valve 41 Head part (air blowing part)
41a Locking surface 42 Tube part (air injection part)
43 First air passage 44 Second air passage 50 Air gap 60 Hole 61 Closing plate 65 Hole 66 Socket (closing member)
66a bottom wall 66b insertion part

Claims (10)

In an air injection valve comprising a head portion arranged on the rim outer periphery side of a vehicle wheel and a pipe portion that penetrates the rim and protrudes from the inner periphery of the rim,
An air injection valve characterized in that the second air passage of the head portion is connected substantially orthogonally to the first air passage of the pipe portion, and the tip thereof opens to the outer peripheral surface of the head portion.   The air injection valve according to claim 1, wherein a plurality of the second air passages are formed. A wheel, an air injection valve according to claim 1 attached to a rim of the wheel, a tire and an annular run-flat core attached to the outer periphery of the rim,
The rim includes a rim body having a rim flange portion on one peripheral edge portion and a side ring attachment portion on the other peripheral edge portion, and a side ring attached to the side ring attachment portion of the rim main body,
In the wheel assembly of the vehicle, in which the core includes a buffer pad made of an elastic material and a core body mounted on the outer periphery of the rim body via the buffer pad.
On the outer peripheral surface of the intermediate region having a substantially cylindrical shape of the rim body, an accommodation recess is provided at one place of the entire circumference,
The head portion of the air injection valve is housed in the housing recess of the rim body, and the tube portion of the air injection valve penetrates the bottom wall of the housing recess and protrudes from the inner periphery of the rim body. A blow-out space for blowing out air is formed between the surface portion where the tip of the second air passage opens on the surface and the inner peripheral surface of the housing recess, and this blow-out space communicates with the space inside the tire. A wheel assembly for a vehicle characterized by comprising:   The housing recess is provided in the vicinity of one of the peripheral portions of the rim body, the core buffer pad covers the housing recess and a part of the head portion of the air injection valve, and the blowing space is 4. The vehicle wheel assembly according to claim 3, wherein the vehicle wheel assembly communicates with a space inside the tire via a gap between the bead portion of the tire and the buffer pad. On the outer periphery of the rim body, a communication groove extending in the circumferential direction and continuing to the blowing space of the housing recess is formed.
5. The vehicle according to claim 4, wherein a notch penetrating in a thickness direction of the buffer pad is formed in a peripheral portion of the buffer pad on the housing recess side, and the notch is continuous with a communication groove of the rim body. Wheel assembly. The inner peripheral surface of the recess housing the rim has a pair of flat engaging surfaces extending substantially in the rim width direction, and the pair of flat engaging members also extending the outer peripheral surface of the head portion of the air injection valve in the rim width direction. The head portion is prevented from rotating by having a surface and these locking surfaces hit each other,
The second air passage of the air injection valve is formed on a straight line formed in two and extending substantially in the rim width direction,
Two blowing spaces are formed between the inner circumferential surface of the housing recess and the outer circumferential surface of the head portion so as to correspond to the two second air passages, and these two blowing spaces are adjacent to the locking surface. The vehicle wheel assembly according to claim 5, wherein the vehicle wheel assembly is continuous through a shallow notch, and the communication groove is continuous with a blowing space closer to the bead portion of the tire. A communication groove extending in the circumferential direction and continuing to the blowing space of the housing recess is formed on the inner periphery of the buffer pad,
5. The vehicle according to claim 4, wherein a notch penetrating in a thickness direction of the buffer pad is formed in a peripheral portion of the buffer pad on the side of the housing recess, and the notch is continuous with a communication groove of the buffer pad. Wheel assembly.   The rim body includes a cylindrical member having the rim flange portion, a cylindrical member having the side ring mounting portion, and an intermediate cylindrical member disposed between the cylindrical members, and adjacent cylindrical members are welded to each other. The intermediate cylindrical member has an outer peripheral surface that forms a cylindrical surface, and has a thick portion that protrudes to the inner peripheral side over the entire circumference, and the accommodating recess is formed in the thick portion. The vehicle wheel assembly according to any one of claims 3 to 7.   A hole is formed in an intermediate region of the rim body, a peripheral portion of a closing plate that closes the hole is welded to an inner peripheral surface of the rim body, and the accommodation recess is formed by the hole and the closing plate. The wheel assembly for a vehicle according to any one of claims 3 to 7, A hole is formed in an intermediate region of the rim body, and the hole is closed with a closing member. The closing member has a bottom wall and an insertion portion standing up from the bottom wall. Part protrudes from the outer peripheral surface of the insertion part,
The insertion part of the closing member is inserted into the hole, the peripheral edge of the insertion part and the peripheral edge of the hole on the outer peripheral surface side of the rim main body are welded, and the peripheral edge of the bottom wall and the inner peripheral surface of the rim main body are The vehicle wheel assembly according to any one of claims 3 to 7, wherein the housing concave portion is formed in the insertion portion by welding.

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