HK1181355B - Vehicle wheel, running wheel, vehicle and method of assembling and disassembling vehicle wheel - Google Patents

Description

Vehicle wheel, running wheel, vehicle, and method for assembling and disassembling vehicle wheel

Technical Field

The invention relates to a vehicle wheel, a running wheel, a vehicle and a method for assembling and disassembling the vehicle wheel.

The present invention is based on the application of the priority claim 2010-284851 in Japanese application No. 2010, 12/21, the content of which is incorporated herein by reference.

Background

Conventionally, in a new traffic system such as a monorail or a subway, there is known a vehicle using a core type auxiliary wheel tire for supporting a tire from the inside when the inner pressure of a tubeless pneumatic tire is lowered. In such a pneumatic tire wheel, a bead portion of the tire is partially opened, a core is assembled to the inside, and a rubber sheet is attached. Then, the wheel provided with the core is set in a press-fitting jig, moved on the wheel from which the rim retainer is removed, and the tire is press-fitted into the rim by the jig. The rim bead is placed on the tire and further pressed into the tire until the groove for the lock ring is visible. Then, the lock ring is hooked in the groove and assembled, and the tire is inflated. When the tire is replaced due to wear or the like, the tire is removed using a special press-fitting jig in the reverse order of the assembly order.

However, there is a vehicle wheel in which a plurality of engagement portions are provided at a joint portion of a divided wheel (see, for example, patent document 1).

Patent document 1 discloses a tire in which bead portions of the tire are press-fitted into respective rims, and then engagement portions of the respective rims are aligned. Thereafter, the rims are rotated relative to each other, aligned with the holes for hub bolts, attached to the axle hub, and then air is filled into the tire to assemble the tire.

Documents of the prior art

Patent document

Patent document 1: japanese unexamined patent application publication No. 2008-302858

However, the conventional vehicle wheel has the following problems.

Disclosure of Invention

Problems to be solved by the invention

That is, in patent document 1, when air is filled into the tire before the wheel hub is attached, the divided wheels may fall off the tire. Further, although the rim groups are divided to facilitate assembling of the hard tire, it is necessary to rotate and engage the respective divided rims in the opposite direction after the beads of the tire are pushed into the respective divided rims. In addition, after the tire is mounted on the rim, the tire is usually mounted on the vehicle after being inflated to become a running wheel, but there is a problem that even if the tire is inflated, the tire is easily detached from the engagement structure.

In addition, in the tire replacement of a general core type tire wheel with an auxiliary wheel, a special jig having a hydraulic press function is required, and thus, a tire replacement place is limited. Further, since the tire is replaced with a special work by a skilled technician, there is a problem that such a work cannot be dealt with for a sudden tire exposure during running or the like.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a vehicle wheel, a travel wheel, a vehicle, and a method for assembling and disassembling the vehicle wheel, which can improve the work efficiency and the workability of assembling and dividing.

Technical scheme for solving problems

In order to achieve the above object, a first aspect of the present invention provides a vehicle wheel in which an inner wheel and an outer wheel that are divided into two parts in a tire axial direction are coupled to each other and fixed to an axle hub, the vehicle wheel comprising: a first bolt that couples coupling surfaces of the inner wheel and the outer wheel to each other; and a second bolt coupled to the outer wheel and the axle hub, wherein the first bolt and the second bolt are screwed with nuts from the outer wheel side.

A second aspect of the present invention provides a method of assembling and disassembling a vehicle wheel according to the first aspect including a pneumatic tire, the method including: a first step of loosening the nut to remove the second bolt from the outer side of the outer wheel; a second step of releasing air in the tire to reduce the internal pressure; a third step of loosening the nut to remove the first bolt from the outer side of the outer wheel; and a fourth step of separating the inner wheel and the outer wheel from each other and removing the inner wheel and the outer wheel from the tire, wherein the fourth step is performed in the order from the first step to the fourth step when the vehicle wheel is detached from the tire, and the fourth step is performed in the order reverse to the order of the detachment when the vehicle wheel is attached to the tire.

According to the aspect of the present invention, since the first bolt attached to the inner wheel and the second bolt attached to the axle hub are provided on the outer wheel, respectively, it is possible to prevent the assembly and disassembly of the inner wheel and the outer wheel from being performed simultaneously with the assembly and disassembly of the outer wheel and the axle hub. That is, when the tire is replaced, the wheel with the tire can be removed from the axle hub by removing the second bolt first. In this case, since the inner wheel and the outer wheel are coupled by the first bolt, the wheels are not separated from each other by the internal pressure of the tire, and the working state can be maintained satisfactorily.

Further, since the outer wheel is attached to the axle hub, there is an advantage in safety that even if the first bolt is loosened by mistake, the outer wheel and the axle hub are coupled by the second bolt, and therefore the wheel is the inner wheel which is thrown out by the internal pressure of the tire, and the wheel does not fly out to the side of the operator on the outer side.

In the vehicle wheel according to the first aspect, it is preferable that a first cover is provided to cover the first nut that is screwed to the first bolt.

In the vehicle wheel according to the first aspect, the first nut for the first bolt that couples the inner wheel and the outer wheel is covered with the first cover, and therefore the first nut is not visible from the outside. Further, since the first nut cannot be loosened from the outside without removing the first cover, it is possible to prevent the inner wheel and the outer wheel from being separated by removing the first bolt by mistake before removing the outer wheel and the axle hub.

In the vehicle wheel according to the first aspect, the first cover body is preferably fastened by a second nut that is screwed to the second bolt.

In this case, the first cover may be detached from the outer wheel by loosening and removing the second nut paired with the second bolt. Therefore, when disassembling the wheel, the disassembly process may be performed by first removing the outer wheel and the axle hub, then loosening the first nuts and removing them from the inner wheel and the outer wheel, and separating the inner wheel and the outer wheel.

In the vehicle wheel according to the first aspect, it is preferable that a coupling type coupling portion that projects toward the other coupling surface side is provided on the coupling surface of either the inner wheel or the outer wheel so as to extend over the entire circumference in the circumferential direction.

In this case, the inner wheel and the outer wheel can be prevented from being eccentric with respect to the axle by the fitting type joint portion. In addition, when assembling the divided wheels, the fitting type coupling portion protruding from the coupling surface of one divided wheel may be engaged with the other divided wheel, so that the both divided wheels can be easily positioned coaxially, and thus the assembling work can be efficiently performed.

In the vehicle wheel according to the first aspect, it is preferable that a second cover is provided to cover the first bolt on the inner wheel side.

In the vehicle wheel according to the first aspect, the first bolt that couples the inner wheel and the outer wheel is covered by the second cover, and therefore the first bolt is not visible from the outside. Further, since the first bolt cannot be removed unless the second cover is removed, it is possible to prevent the inner wheel and the outer wheel from being separated from each other by removing the first bolt by mistake before the outer wheel and the axle hub are removed.

In the vehicle wheel according to the first aspect, it is preferable that the inner wheel is provided with an air hole communicating with the outer peripheral surface of the rim, and the end of the air hole on the inner peripheral side of the rim is provided with a whistle mechanism portion which is fixed by a third nut and generates a warning sound by air flowing through the air hole from the outer peripheral side of the rim toward the inner peripheral side, and the second cover body is fastened by the third nut of the whistle mechanism portion.

In the vehicle wheel according to the first aspect, the second cover can be removed from the inner wheel by removing the wheel from the axle hub and then removing the third nut of the whistle mechanism portion from the second cover by loosening. That is, when the inner wheel and the outer wheel are disassembled, the second cover can be removed without releasing air inside the tire. In this case, when the third nut of the whistle mechanism portion is loosened, air in the tire flows toward the rim outer peripheral side through the air hole, and the whistle mechanism portion generates an alarm sound. Therefore, until the warning sound disappears, the second cover body can be removed after the internal pressure inside the tire is lowered by the air valve. Thereafter, a disassembly process may be performed in which the first nut is loosened and removed from the inboard and outboard wheels, and the inboard and outboard wheels are separated.

In the vehicle wheel according to the first aspect, a third cover may be provided to cover the first nut that is screwed to the first bolt, and a valve that communicates with the inside of the tire may be provided in the outer wheel. Further, a third cover may be provided at the mouth of the valve, and the third cover may be fastened by a fourth nut.

In the vehicle wheel according to the first aspect, the first nut for the first bolt that couples the inner wheel and the outer wheel is covered with the third cover, and therefore is not visible from the outside. Further, since the first nut cannot be loosened from the outside without removing the third cover, it is possible to prevent the inner wheel and the outer wheel from being separated by removing the first bolt by mistake before removing the outer wheel and the axle hub.

Then, after the wheel is removed from the axle hub, the fourth nut is loosened and removed from the third cover, whereby the third cover can be removed from the outer wheel. That is, when the inner wheel and the outer wheel are disassembled, it is not necessary to release the air inside the tire. When the third cover is to be removed, the third cover may be removed after the air in the tire flows out to the outside of the outer wheel through the air gate to lower the internal pressure of the tire when the fourth nut is loosened.

Thereafter, the first nut may be loosened and removed from the inner wheel and the outer wheel, and a disassembly process for disassembling the inner wheel and the outer wheel may be performed.

A third aspect of the present invention provides a running wheel in which a tire is mounted on the vehicle wheel of the first aspect.

A fourth aspect of the present invention provides a vehicle including the running wheel according to the third aspect.

In the third and fourth aspects, since the tire is mounted on the vehicle wheel of the first aspect, a traveling wheel or a vehicle with high work efficiency in assembly and disassembly can be provided.

Effects of the invention

According to the vehicle wheel, the travel wheel, the vehicle, and the method for assembling and disassembling the vehicle wheel of the aspect of the present invention, the first bolt attached to the inner wheel and the second bolt attached to the axle hub are provided. Therefore, since the axle hub is attached to the outer wheel, the outer wheel and the axle hub are coupled to each other by the second bolt even if the first bolt is loosened by mistake when the tire is replaced. Therefore, the wheels do not fly out to the outside of the operator, and the work efficiency, workability, and safety of assembly and disassembly can be improved.

Drawings

Fig. 1 is a cross-sectional view showing a running wheel according to a first embodiment of the present invention;

FIG. 2 is a side view of the wheel shown in FIG. 1 from the outboard side;

FIG. 3 is an enlarged partial view of the wheel shown in FIG. 1;

fig. 4 is a cross-sectional view showing a running wheel according to a second embodiment of the present invention;

FIG. 5 is an enlarged fragmentary view of the wheel shown in FIG. 4, corresponding with FIG. 3;

FIG. 6 is a side sectional view showing the whistle mechanism portion;

fig. 7 is a partial sectional view showing a wheel according to a third embodiment.

Detailed Description

Hereinafter, a vehicle wheel, a travel wheel, a vehicle, and a method for assembling and disassembling the vehicle wheel according to embodiments of the present invention will be described with reference to the drawings.

(first embodiment)

As shown in fig. 1, a vehicle wheel (hereinafter, simply referred to as a wheel 1A) according to the first embodiment is a tubeless tire (hereinafter, simply referred to as a tire 2) having a core 3 incorporated therein.

Here, reference numeral 4 in fig. 1 denotes an axle hub, reference numeral 5 denotes a valve, and reference numeral 6 denotes a rubber sheet provided between the core 3 and a rim flange of the wheel 1A.

In fig. 1 and 3, the left side of the drawing is the inside in the vehicle width direction, and the right side of the drawing is the same and the outside in the vehicle width direction.

In the wheel 1A, the direction of the axle hub 4 perpendicular to the axle P is referred to as a radial direction or a radial direction, the direction of rotation around the axle P is referred to as a circumferential direction, and the direction parallel to the axle P is referred to as a width direction X.

As shown in fig. 1 to 3, the wheel 1A includes a plurality of (20 in fig. 2) wheel coupling bolts 7 (first bolts), and a plurality of (10 in fig. 2) hub bolts 8 (second bolts) that couple the outer wheel 20 and the axle hub 4. The wheel coupling bolt 7 couples the inner wheel 10 and the outer wheel 20, which are divided into two halves in the axle P direction, to each other, and is fixed to the axle hub 4, thereby coupling surfaces 10a and 20a of the inner wheel 10 and the outer wheel 20 to each other. The wheel coupling bolts 7 and the hub bolts 8 are screwed with nuts 9 from the outer wheel 20 side, respectively.

The axle hub 4 is provided with a hub flange 41 projecting in the radial direction at a predetermined position in the axial direction, and a plurality of (10 in fig. 2) hub bolt holes 42 penetrating in the thickness direction along the outer peripheral portion thereof and arranged at equal intervals in the circumferential direction.

The inner wheel 10 includes a rim portion 11 fitted to a bead portion on one side in the width direction of the tire 2 and a disk portion 12 fixed to the axle hub 4 on the vehicle side, and is disposed on the inner side in the vehicle width direction. The rim portion 11 is formed in a ring shape at the periphery of the disk portion 12, and a rim flange is provided at an axial end thereof.

The disk portion 12 has a circular opening 12a at the center, and a plurality of (20 in fig. 2) outer periphery side bolt holes 13 for the wheel connecting bolts 7 are provided at equal intervals in the circumferential direction on the outer periphery side. The size of the opening 12a is larger than the outer diameter of the hub flange 41 of the axle hub 4.

The outer wheel 20 includes a rim portion 21 fitted to the bead portion on the other side in the width direction of the tire 2 and a disk portion 22 fixed to the axle hub 4 on the vehicle side, and is disposed on the outer side in the width direction of the vehicle. The rim portion 21 is formed in a ring shape along the periphery of the disk portion 22, and a rim flange is provided at an axial end thereof.

The disk portion 22 has a circular opening 22a at the center, and a plurality of (20 in fig. 2) outer periphery side bolt holes 23 for the wheel connecting bolts 7 are provided at equal intervals in the circumferential direction on the outer periphery side. A plurality of (10 in fig. 2) inner peripheral bolt holes 24 for the hub bolts 8 are provided at equal intervals in the circumferential direction on the inner peripheral side of the plurality of outer peripheral bolt holes 23. The plurality of outer peripheral side bolt holes 23 are arranged at the same radial position and at the same circumferential interval so as to correspond to the plurality of outer peripheral side bolt holes 13 of the inner wheel 10. On the other hand, the inner peripheral bolt holes 24 are arranged at the same radial position and at the same circumferential interval so as to correspond to the plurality of hub bolt holes 42 of the axle hub 4.

The outer wheel 20 is mounted to the hub flange 41 of the axle hub 4 from the outside. That is, the outer side surface 41a of the hub flange 41 and the coupling surface 20a of the outer wheel 20 are fitted to the axle hub 4.

The opening 22a has an outer diameter sized to receive the axle hub 4.

On the coupling surfaces 10a, 20a of the inner wheel 10 and the outer wheel 20, on the radial outer peripheral side, a convex portion 14 (fitting type coupling portion) protruding from the coupling surface 10a side of the inner wheel 10 extends over the entire circumference in the circumferential direction. The coupling surface 20a of the outer wheel 20 is provided with a recessed portion 25 corresponding to the protruding portion 14 over the entire circumferential direction. The convex portion 14 and the concave portion 25 are engaged with each other, whereby the eccentricity of the inner wheel 10 and the outer wheel 20 with respect to the axle P can be restricted.

Further, an O-ring is provided on a joint surface of the inner wheel 10 and the outer wheel 20 to prevent air in the tire 2 from leaking through the joint surface. Thus, the wheel 1A can be applied to a tubeless tire.

Next, a method of assembling and disassembling the wheel 1A will be described.

First, when disassembling the wheel 1A from the tire 2, as shown in fig. 1, the second nuts 9B are loosened to disassemble the plurality of hub bolts 8 from the outside of the outer wheel 20 (first step). Thereby, the hub flange 41 of the axle hub 4 and the outer wheel 20 are disengaged, and the assembly of the wheel 1A and the tire 2 can be detached from the axle hub 4. In this case, the operator can perform work without entering the inside of the vehicle, that is, without entering the side of the inner wheel 10. After that, the air in the tire 2 is released from the air valve 5 to reduce the internal pressure thereof (second step).

Next, the wheel coupling bolt 7 is removed from the outer side of the outer wheel 20 by loosening the first nut 9A (third step). In this case, the operator can perform work without entering the inside of the vehicle, that is, without entering the inner wheel 10 side.

Then, the inner wheel 10 and the outer wheel 20 are separated at the joint surfaces 10a and 20a and removed from the tire 2 (fourth step).

In the present embodiment, the core 3 is incorporated into the tire 2, and therefore, after the wheel 1A is removed from the tire 2, the core 3 is disassembled and removed from the tire 2.

In addition, the assembly of the wheel 1A to the tire 2 is performed according to the reverse procedure to that in the disassembly. That is, the inner wheel 10 and the outer wheel 20 are brought into contact with each other at predetermined positions of the axle hub 4 via the coupling surfaces 10a and 20a, the wheel coupling bolts 7 are inserted into the outer peripheral side bolt holes 13 and 23 from the inner wheel 10 side, and the nuts 9A are fastened to the wheel coupling bolts 7 from the outer wheel 20 side. Then, air is supplied from the valve 5 into the tire 2.

Then, the pressure is increased to a predetermined internal pressure, the supply of air is stopped, the outer side surface 41a of the hub flange 41 and the coupling surface 20a of the outer wheel 20 are joined together, and the hub bolts 8 are inserted into both the hub bolt holes 42 and the inner peripheral bolt holes 24 from the inner wheel 10 side. The second nuts 9B are fastened to the hub bolts 8 from the outer wheel 20 side, and the assembly of the wheel 1A to the tire 2 is completed.

Next, the operation of the wheel 1A divided into two will be described based on the drawings.

As shown in fig. 1, the wheel 1A of the present embodiment is provided with a wheel connecting bolt 7 attached to the inner wheel 10 and a hub bolt 8 of a hub flange 41 attached to the axle hub 4, respectively, on the outer wheel 20. This prevents the assembly and disassembly of the inner wheel 10 and the outer wheel 20 and the assembly and disassembly of the outer wheel 20 and the axle hub 4 from being performed simultaneously.

That is, when the tire 2 is replaced, the wheel with the tire can be detached from the axle hub 4 by first detaching the hub bolt 8. At this time, since the inner wheel 10 and the outer wheel 20 are coupled by the wheel coupling bolt 7, they are not separated by the internal pressure of the tire 2, and the working state can be maintained well.

In addition, the outer wheel 20 is mounted on the axle hub 4. Therefore, even if the wheel coupling bolts 7 are loosened by mistake, the outer wheel 20 and the axle hub 4 are coupled by the hub bolts 8, and the inner wheel 10 is thrown out by the internal pressure of the tire 2. This has an advantage in safety that the wheels do not fly out to the outside of the worker.

Further, by dividing the wheel 1A into two halves, it is not necessary to use a hydraulic press for disassembling and assembling the core type tire with the auxiliary wheel, and a special jig is not necessary.

Further, by setting the eccentricity of the inner wheel 10 and the outer wheel 20 to zero, the inner wheel 10 and the outer wheel 20 can be manufactured by one metal mold, and cost reduction can be achieved. On the other hand, the positions of the coupling surfaces 10a and 20a of the inner wheel 10 and the outer wheel 20 may be shifted to add eccentricity. Therefore, when the wheel 1A is divided into two, the shape may be formed in accordance with the structure of the tire mounting portion.

Further, the convex portion 14 protruding toward the coupling surface 20a of the outer wheel 20 is provided to extend over the entire circumferential direction on the coupling surface 10a of the inner wheel 10, and the convex portion 14 and the concave portion 25 are engaged with each other, whereby the inner wheel 10 and the outer wheel 20 can be prevented from being eccentric with respect to the axle P.

In addition, when the divided inner wheel 10 and the divided outer wheel 20 are assembled, the convex portion 14 and the concave portion 25 are engaged with each other, so that the divided wheels 10 and 20 can be easily positioned coaxially with each other, and therefore, the assembly work can be efficiently performed.

In the vehicle wheel, the travel wheel, the vehicle, and the method for assembling and disassembling the vehicle wheel according to the first embodiment described above, the wheel coupling bolts 7 attached to the inner wheel 10 and the hub bolts 8 attached to the axle hub 4 are provided, respectively, and the outer wheel 20 is attached to the axle hub 4. Therefore, even if the wheel coupling bolt 7 is loosened by mistake at the time of replacing the tire 2, the outer wheel 20 and the axle hub 4 are coupled by the second bolt, and the wheel can be prevented from flying out toward the outer side of the operator. Therefore, the work efficiency and workability of assembling and dividing can be improved and the safety can be improved.

Next, another embodiment of a vehicle wheel, a travel wheel, a vehicle, and a method for assembling and disassembling the vehicle wheel according to the present invention will be described with reference to the drawings. The same or similar components and portions as those of the first embodiment are denoted by the same reference numerals, and description thereof is omitted, and a description is given of a configuration different from that of the first embodiment.

(second embodiment)

As shown in fig. 4 and 5, a wheel 1B (vehicle wheel) of the second embodiment includes a first cover 30 covering a first nut 9A screwed to a wheel coupling bolt 7, and a second cover 31 covering the wheel coupling bolt 7 inserted from the inner wheel 10 side into outer peripheral side bolt holes 13 and 23 of the inner wheel 10 and the outer wheel 20.

The first cover 30 is fastened by a second nut 9B screwed with the hub bolt 8. That is, the first cover 30 includes a locking portion 30a having a bolt hole through which the tip end of the hub bolt 8 is inserted, and is formed in a plate shape that is bent so as to extend outward from the locking portion 30a and cover the outer peripheral side of the first nut 9A.

The inner wheel 10 is provided with an air hole 32 communicating with the rim outer peripheral surface thereof. A whistle mechanism portion 34 that is fixed to the rim inner peripheral side end portion of the air hole 32 by a third nut 33 and emits a warning sound by air flowing through the air hole 32 from the rim outer peripheral side toward the inner peripheral side is provided.

The whistle mechanism 34 will be described in more detail with reference to fig. 6. The whistle mechanism 34 includes a tightening screw 34A, a whistle main body 34B communicating with the through hole 34A at the tip of the tightening screw 34A, and a ball valve 34C for opening and closing an air flow path of the air hole 32 according to the screw entry amount of the tightening screw 34A. The tightening screw 34A is screwed into a female screw portion formed at the rim inner peripheral end of the air hole 32, and includes a through hole 34A communicating with the air hole 32.

The third nut 33 is integrally fixed to the outer periphery of the tightening screw 34A. By tightening the third nut 33, the tightening screw 34A is locked to the female screw portion, and the ball valve 34C is pressed by the tip end thereof to open and close the air hole 32. On the other hand, when the third nut 33 is loosened, the tip of the tightening screw 34A retreats toward the inner periphery of the rim, the ball valve 34C opens, and the air in the tire 2 is discharged through the through hole 34A while generating an alarm sound at the whistle main body 34B.

The second cover 31 is fastened by the third nut 33 of the whistle mechanism portion 34, includes the locking portion 31a having a bolt hole through which the tightening screw 34A is inserted, and is formed in a flat plate shape that is bent so as to cover the outer peripheral side of the wheel coupling bolt 7 from the locking portion 31 a. That is, second cover 31 is attached by placing locking portion 31a between third nut 33 and rim portion 11.

According to the wheel 1B of the second embodiment of the present invention, the first nut 9A for the wheel coupling bolt 7 that couples the inner wheel 10 and the outer wheel 20 is covered by the first cover 3, and therefore is not visible from the outside. Further, since the first nut 9A cannot be loosened from the outside without removing the first cover 30, it is possible to prevent the inner wheel 10 and the outer wheel 20 from being separated by removing the wheel coupling bolt 7 by mistake before removing the outer wheel 20 and the axle hub 4.

Then, the first cover 30 can be removed from the outer wheel 20 by loosening and removing the second nuts 9B corresponding to the hub bolts 8. Therefore, when disassembling the wheel 1B, the disassembly process may be performed in which the outer wheel 20 and the axle hub 4 are first removed, and then the first nut 9A is loosened and removed to separate the inner wheel 10 and the outer wheel 20.

Since the wheel coupling bolt 7 that couples the inner wheel 10 and the outer wheel 20 is covered by the second cover 31, it is not visible from the outside. The wheel coupling bolts 7 cannot be removed unless the second cover 31 is removed, and the inner wheel 10 and the outer wheel 20 can be prevented from being separated from each other by removing the wheel coupling bolts 7 by mistake before the outer wheel 20 and the axle hub 4 are removed.

After the wheel is removed from the axle hub 4, the second cover 31 can be removed from the inner wheel 10 by loosening and removing the third nut 33 of the whistle mechanism 34. That is, when the inner wheel 10 and the outer wheel 20 are disassembled, the second cover can be detached without discharging the air inside the tire 2 from the air valve 5. In this case, when the third nut 33 of the whistle mechanism portion 34 is loosened, air in the tire 2 flows toward the rim outer peripheral side through the air hole 32, and thereby the whistle mechanism portion 34 emits an alarm sound. Therefore, until the alarm sound disappears, second cover 31 can be removed after the internal pressure inside tire 2 has decreased. Then, a disassembly process of loosening and removing the first nut 9A and separating the inner wheel 10 and the outer wheel 20 may be performed.

(third embodiment)

Next, a wheel 1C (vehicle wheel) of the third embodiment shown in fig. 7 is attached to the mouth of the valve 5 communicating with the inside of the tire provided on the outer wheel 20 in a state of being fastened by a fourth nut 36, by covering a third cover 35 of the first nut 9A screwed to the wheel coupling bolt 7, in place of the first cover 30 (see fig. 4) of the second embodiment described above.

The third cover 35 is formed with an engagement portion 35a having a bolt hole through which the valve 5 is inserted, and is formed in a plate shape that curves so as to cover the outer peripheral side of the first nut 9A from the engagement portion 35 a.

In this case, the first nut 9A for the wheel coupling bolt 7 that couples the inner wheel 10 and the outer wheel 20 is covered by the third cover 35, and therefore is not visible from the outside. Further, since the first nut 9A cannot be loosened from the outside without removing the third cover, it is possible to prevent the inner wheel 10 and the outer wheel 20 from being separated by removing the wheel coupling bolt 7 by mistake before removing the outer wheel 20 and the axle hub 4.

After the wheel 1C is removed from the axle hub 4, the third cover 35 can be removed from the outer wheel 20 by loosening the fourth nut 36 and removing the third cover 35. That is, when the third cover 35 is removed without releasing the air inside the tire 2 when the inner wheel 10 and the outer wheel 20 are disassembled, the air inside the tire 2 flows out to the outside of the outer wheel 20 through the air gate 5 when the fourth nut 36 is loosened, and the third cover 35 can be removed after the internal pressure inside the tire 2 is reduced. Then, the disassembly process of loosening and removing the first nut 9A to separate the inner wheel 10 and the outer wheel 20 can be performed.

The embodiments of the vehicle wheel, the running wheel, the vehicle, and the method for assembling and disassembling the vehicle wheel according to the present invention have been described above, but the present invention is not limited to the above embodiments, and can be modified as appropriate within a scope not departing from the gist thereof.

For example, the tire 2 according to the present embodiment may be incorporated with a core, or may be applied to a tire without a core.

The number of the wheel connecting bolts 7 and the number of the hub bolts 8 may be appropriately changed according to conditions such as the diameter of the wheel.

The shapes, mounting positions, mounting structures, and the like of first cover 30, second cover 31, and third cover 35 are not limited to the above-described embodiments, and may be modified.

In addition, the components of the above embodiments may be replaced with known components as appropriate without departing from the scope of the present invention, and the above embodiments may be combined as appropriate.

Industrial applicability

According to the vehicle wheel, the travel wheel, the vehicle, and the method for assembling and disassembling the vehicle wheel of the present invention, the wheel is unlikely to fly out toward the side of the operator on the outside, and the work efficiency of the assembly and the separation can be improved, and the safety can be improved.

Description of the marks

1A, 1B, 1C wheel (vehicle wheel)

2 tyre

3 core

4 axle hub

7 wheel combination bolt (first bolt)

8 hub bolt (second bolt)

9A, 9B nut

10 inside wheel

10a joint surface

13 bolt hole on periphery side

14 convex part (matching type combination part)

20 outside wheel

23 bolt hole on periphery side

24 inner peripheral bolt hole

25 concave part

30 first cover

31 second cover body

33 third nut

34 whistle mechanism part

35 third cover

36 fourth nut

41 hub flange

42 hub bolt hole

Claims (7)

1. A vehicle wheel in which an inner wheel and an outer wheel that are divided into two parts in a tire axial direction are coupled to each other and fixed to an axle hub, the vehicle wheel comprising:

a first bolt that joins the first joining surface of the inner wheel and the second joining surface of the outer wheel;

a second bolt that couples the outboard wheel and the axle hub,

the first bolt and the second bolt are screwed with a nut from the outer wheel side,

a convex portion that protrudes from the first joining surface over the entire circumferential direction on the radially outer peripheral side of the inner wheel is provided on the first joining surface,

a concave portion that engages with the convex portion over the entire circumferential direction on the radially outer peripheral side of the outer wheel is provided on the second coupling surface,

a first cover body covering a first nut screwed with the first bolt,

the first cover body is fastened with a second nut screwed with the second bolt.

2. The vehicle wheel according to claim 1,

a second cover body that covers the first bolt on the inner wheel side is provided.

3. The vehicle wheel according to claim 2,

the inner wheel is provided with an insertion hole communicated with the outer peripheral surface of the rim,

a whistle mechanism portion that is fixed by a third nut and generates a warning sound by air flowing from the outer peripheral side of the rim toward the inner peripheral side of the insertion hole is provided at the rim inner peripheral side end portion of the insertion hole,

the second cover body is fastened by a third nut of the whistle mechanism part.

4. A vehicle wheel in which an inner wheel and an outer wheel that are divided into two parts in a tire axial direction are coupled to each other and fixed to an axle hub, the vehicle wheel comprising:

a first bolt that joins the first joining surface of the inner wheel and the second joining surface of the outer wheel;

a second bolt that couples the outboard wheel and the axle hub,

the first bolt and the second bolt are screwed with a nut from the outer wheel side,

a convex portion that protrudes from the first joining surface over the entire circumferential direction on the radially outer peripheral side of the inner wheel is provided on the first joining surface,

a concave portion that engages with the convex portion over the entire circumferential direction on the radially outer peripheral side of the outer wheel is provided on the second coupling surface,

a third cover body covering a first nut screwed with the first bolt,

a valve communicated with the inside of the tire is arranged on the outer wheel,

the opening of the air valve is fixed by a fourth nut,

the third cover body is fastened by the fourth nut.

5. A running wheel comprising the vehicle wheel according to any one of claims 1 to 4 and a tire mounted thereon.

6. A vehicle provided with the running wheel according to claim 5.

7. A method of assembling and disassembling a vehicle wheel according to any one of claims 1 to 4, the vehicle wheel including a pneumatic tire, the method comprising:

a first step of removing the second bolt from the outer side of the outer wheel by loosening the nut;

a second step of releasing air in the tire to reduce an internal pressure;

a third step of loosening the nut to detach the first bolt from the outer side of the outer wheel;

a fourth step of detaching the inner wheel and the outer wheel from the tire,

performing disassembly of the vehicle wheel from the tire in the order from the first step to the fourth step,

the assembling of the vehicle wheel to the tire is performed in the reverse order of the disassembling.