JP3749537B2 - wheel - Google Patents

Description

  The present invention relates to a wheel for assembling a tire such as an automobile. More specifically, the present invention improves safety when the internal pressure of a tire decreases, workability such as assembly and inspection with a tire, and attachment to an existing vehicle body. It is about.

  Tires for automobiles and the like are assembled, for example, on a wheel having a tire insertion rim on the periphery of a disk attached and fixed to an axle. The tire is filled with air at an appropriate pressure, but if the air pressure in the tire suddenly decreases during running, for example, due to puncture, the rim may be damaged by contact with the ground. , There is a problem that meandering makes driving operation difficult. In general, a wheel used in a passenger car is provided with a recess (commonly referred to as “drop”) necessary for attaching and detaching a tire at the center of the rim portion (center in the tire width direction). This dent is necessary for the tire bead portion to get over the rim edge (or rim flange), and one of the tire bead portions can be dropped into the dent, and the other bead portion can get over the rim edge. The depth and shape are determined as follows. For this reason, in the method of providing the support in the tire, the inner diameter of the wheel is reduced by the recess, and the size of the brake parts and the like that need to be accommodated therein is restricted. It is not possible to install it on all modern cars. Furthermore, at the time of puncture, the bead portion falls into the recess, so that the tire comes off from the rim, which may cause the vehicle to roll over.

Among the above-mentioned problems, various tires or wheels have been proposed for the continuation of travel at the time of puncture. For example, Patent Document 1 discloses a tire in which a disk-shaped mountain-shaped portion is formed on a wheel. When the tire is punctured, the disk-shaped portion serves as a wheel to continue running. . Patent Document 2 discloses a tire assembly rim having a support portion for maintaining the tire rotation radius that supports the crown portion of the tire from the radially inner side when the internal pressure of the tire is reduced, and the support portion is integrated with the rim. It is disclosed that, by molding, the load acting on the support portion is distributed over the entire rim to achieve high-speed stable running during puncture and the extension of the continuous running distance. Furthermore, in Patent Document 3, for the purpose of reducing damage to the inner surface of the tire during puncture travel, annular cores are respectively attached to the positions corresponding to the shoulder portions on the left and right sides of the tire on the rim outer peripheral surface of the wheel. A safety wheel having at least a two-layer structure at a portion in contact with the tire inner surface of the core is disclosed.
JP 2002-144828 A JP-A-7-290913 JP-A-7-52614

  In each of Patent Documents 1 to 3 described above, the tire is supported from the inside during puncture by an annular support member or a core provided on the outer peripheral surface of the wheel (or rim) to enable the vehicle to continue running. However, the better the performance, the less the vehicle behavior changes during punctures, and the driver is more likely to notice. If you continue to drive while punctured, it may lead to more serious damage or accidents due to heat generation. In the background art, since the support member and the core protrude outward in the rim radial direction, it is very difficult to assemble the tire and remove the rim. Furthermore, in any of the background technologies, once the tire is attached to the vehicle body, it is not possible to confirm that the entire tire must be removed from the vehicle body when performing an inspection in the event of an abnormality. Can not do it.

  The present invention focuses on the above points, and an object of the present invention is to provide a wheel that allows a driver to quickly detect a tire abnormality and to detect a puncture early and safely stop the vehicle. It is to be. Another object is to provide a highly versatile wheel that can be easily assembled and inspected and can be attached to an existing commercial vehicle.

  In order to achieve the above object, the present invention provides a wheel attached to an axle, a plane portion substantially perpendicular to the axle, a substantially cylindrical side portion along the axial direction of the axle, and the side surface. A flange portion for holding one of the bead portions of the tire on the open end side of the portion, an inner rim disposed on the axle side, a plane portion substantially perpendicular to the axle, and the plane portion An outer rim provided on the edge and having a flange portion for holding the other bead portion of the tire, and a substantially disk shape sandwiched between the flat portions of the inner rim and the outer rim and fixed to the axle And a plurality of blades projecting in a radial direction from the edge of the disk part and provided at a predetermined interval in the circumferential direction, and having a circular arc substantially concentric with the disk part as a part of the outer edge An insertion plate formed integrally with the part, And the maximum diameter of the insertion plate is set to be larger than the maximum diameter of the inner rim and the outer rim and smaller than the maximum diameter of the inner side of the tire, and the internal pressure of the tire decreases. Further, the tread portion of the tire is supported from the inside by the curved surface portion of the outer edge of the blade portion.

  One of the main forms is characterized in that each part of the outer rim, the insertion plate, and the outer rim can be divided. In another embodiment, the inner diameter or rim diameter of the tire is DT1, the cross-sectional height of the tire is DT2, the tire thickness is Tt, the inner depth DT3 of the tire is represented by DT3 = DT2-Tt, When the diameter of the disk portion of the insert plate is DP1, the maximum diameter of the insert plate is DP2, and the radial length DP3 of the blade portion is expressed as DP3 = (DP2-DP1) / 2, DT1 + DT3≈DP2. And DT1≈DP1 + DP3.

  Still another embodiment is characterized in that positioning means for at least one of the inner rim and the outer rim is provided on the surface of the insertion plate. Still another embodiment is characterized in that a bead portion outside the tire is sandwiched between a flange portion of the outer rim and the insertion plate. The above and other objects, features and advantages of the present invention will become apparent from the following detailed description and the accompanying drawings.

According to the present invention, the following effects can be obtained.
(1) A wheel is configured by sandwiching an insertion plate that protrudes in the radial direction and has a plurality of blade portions provided at predetermined intervals in the circumferential direction between an outer rim and an inner rim that hold the tire bead portion, When the internal pressure of the tire is reduced, the load is received by the blade portion having a diameter larger than that of each rim. For this reason, the impact generated by the gaps between the plurality of blade portions is transmitted to the driver, and the occurrence of abnormality can be quickly detected, and the vehicle can be safely stopped before the tires and rims are damaged.
(2) Since each part of the outer rim, inner plate, and inner rim can be divided, only the outer rim is removed and the position of the tire is shifted without removing the entire tire from the vehicle body, so that the damaged portion can be easily checked. be able to. Further, by forming the inner rim in a size corresponding to an existing brake component, it can be attached to a commercial vehicle of each vehicle type and is highly versatile.
(3) Each part of the outer rim, the insertion plate, and the inner rim can be divided, and the shape and size of the insertion plate are set so as to satisfy a predetermined relationship according to the tire dimensions. Therefore, the tire assembly is easy.

  Hereinafter, the best mode for carrying out the present invention will be described in detail based on examples.

  First, Embodiment 1 of the present invention will be described with reference to FIGS. 1A and 1B are diagrams showing the configuration of the present embodiment. FIG. 1A is a plan view, and FIG. 1B is a cross-sectional view taken along line # A- # A in FIG. FIG. FIG. 2 is an exploded perspective view showing the structure of the first embodiment, and FIG. 3 is a diagram showing the dimensional relationship of each part constituting this embodiment. FIG. 4 is a diagram illustrating an example of how the tire is assembled in the present embodiment. As shown in these drawings, the wheel 10 of this embodiment includes an outer tire bead fixing rim (hereinafter referred to as “outer rim”) 30 that holds one of the bead portions 12A of the tire 12 in which the bead wire 14 is embedded, and the other bead. An inner tire bead fixing rim (hereinafter referred to as “inner rim”) 40 that holds the portion 12A, and an insertion plate that is sandwiched and fixed between the outer rim 30 and the inner rim 40 and is inserted into the tire 12 50. Hereinafter, each part is demonstrated in order.

  First, the outer rim 30 has a flange portion 34 for holding the bead portion 12A at the edge of a substantially disc-shaped flat portion 32 having an opening 31 formed in the center, and a bead receiver for receiving the bead portion 12A. The portion 36 is provided. The flat portion 32, the flange portion 34, and the bead receiving portion 36 are integrally formed, and a plurality of bolt holes for passing bolts 60 of an insertion plate 50 described later are provided near the edge of the opening portion 31. 38 are formed at appropriate intervals. The rim diameter DR of the outer rim 30 can be expressed by the outer diameter of the flat surface portion 32, and the maximum diameter DR1 can be expressed by the diameter of a circle whose circumference is the edge of the flange portion 34 (see FIG. 2). Further, as shown in FIG. 3B, the width of the bead receiving portion 36 is represented by WR1.

  Next, the inner rim 40 is provided with a substantially cylindrical side surface portion 44 along the axial direction of the axle 16 at the edge of a substantially disc-shaped flat portion 42 having an opening 41 formed in the center. Further, a flange portion 46 for holding the other bead portion 12 </ b> A is provided on the open end side (vehicle side) of the side surface portion 44. The flat surface portion 42, the side surface portion 44, and the flange portion 46 are integrally formed. In the vicinity of the edge of the opening 41, a plurality of bolt holes 48 for passing the bolts 60 of the insertion plate 50 are provided at appropriate intervals. Is formed. The rim diameter DR of the inner rim 40 is set to be the same as the rim diameter of the outer rim 30 and can be represented by the outer diameter of the flat portion 42. The maximum diameter DR2 is represented by the diameter of a circle whose circumference is the edge of the flange portion 46. Normally, DR1 and DR2 have the same length. The side surface 44 of the inner rim 40 is dimensioned in advance so that a brake component provided on the axle 16, for example, the disk rotor 18, the brake movable portion 20, and the housing 22 can be stored. In FIG. 3B, WR2 represents the width (or length) of the side surface 44 in the axle direction.

  Next, the insertion plate 50 will be described. The insertion plate 50 is sandwiched between the flat portions 32 and 42 of the outer rim 30 and the outer rim 40 and fixed to the housing 22 at the tip of the axle 16, and the disc portion 52. It is comprised by several blade | wing 54A-54C which protruded from the outer periphery of radial direction. A gap 56 having an appropriate width in the circumferential direction is provided between the blades 54A to 54C. That is, the blades 54A to 54C and the gaps 56 are alternately present in the circumferential direction. The edge sides of the blades 54A to 54C are inclined toward the center of the width of the tire 12 when mounted on the tire 12, and further, at the tip thereof, when the internal pressure of the tire 12 decreases. Further, a curved surface portion 55 is formed for supporting the tire 12 from the inside and receiving the load of the vehicle body.

  In the vicinity of the outer periphery of the disk portion 52, a plurality of bolts 60 for fixing to the outer rim 30 and the inner rim 40 are integrally formed at appropriate intervals so as to protrude on both the front and back surfaces. A plurality of bolt holes 62 through which bolts 24 for fixing to the housing 22 pass are formed at appropriate intervals on the inner side, that is, near the center. The bolt 60 is fixed to the outer rim 30 by passing one end 60A side of the bolt 60 through the bolt hole 38 of the outer rim 30 and screwing the nut 66 therethrough. At the same time, the other end 60B side of the bolt 60 is passed through the bolt hole 48 of the inner rim 40 and screwed into the nut 68 to be fixed to the inner rim 40 to constitute the wheel 10. At this time, packing (not shown) may be provided between the inner insertion plate 50 and each part of the outer rim 30 and the inner rim 40 as necessary. Then, by screwing the nut 26 through the bolt 24 through the bolt hole 62 of the insertion plate 50, the entire wheel 10 is fixed to the housing 22, and rotates with the rotation of the axle 16. The rotation can be stopped. Further, projections 64 for positioning the inner rim 40 are provided on the inner rim 40 side surface of the insertion plate 50 at appropriate intervals. Providing such a protrusion 64 facilitates alignment with the inner rim 40 and also prevents displacement when the bolt 60 and the nut 68 are loosened. Similarly, projections 65 for positioning the outer rim 30 are also provided on the surface of the inner insertion plate 50 on the outer rim 30 side at appropriate intervals.

  The dimensional relationship among the insertion plate 50, the tire 12, the outer rim 30, and the inner rim 40 will be described with reference to FIG. As shown in FIG. 3 (A), the inner diameter (or rim diameter) of the tire 12 is DT1, the sectional height of the tire 12 is DT2, the tire thickness is Tt, and the inner depth DT3 of the tire 12 is DT3 = DT2. -Tt. Further, as shown in FIG. 3B, when the diameter of the disk portion 52 of the insertion plate 50 is DP1, and the maximum diameter of the insertion plate 50 when including the blades 54A to 54C is DP2, the blades 54A to 54A. The radial length DP3 of 54C is represented by DP3 = (DP2-DP1) / 2. Further, as shown in FIG. 3C, the thickness of the insertion plate 50 is expressed as Tp. Here, the inner diameter DT1 of the tire substantially coincides with the rim diameter DR (see FIG. 2) of the outer rim 30 and the inner rim 40. Further, the rim width WR of the tire 12 can be expressed by the sum of the width WR of the bead receiving portion 36 of the outer rim 30, the thickness Tp of the insertion plate 50, and the width WR 2 of the side surface portion 44 of the inner rim 40. That is, it is assumed that the relationship of WR = WR1 + Tp + WR2 is established.

  First, the dimensional relationship between the outer rim 30 and the inner rim 40 and the insertion plate 50 will be described. The maximum diameter DP2 of the insertion plate 50 is larger than the maximum diameters DR1 and DR2 of the outer rim 30 and the inner rim 40. Is set to Thereby, when the internal pressure of the tire 12 decreases, the tread portion 12B of the tire 12 can be supported from the inside by the curved surface portion 55 of the edge of the blades 54A to 54C, and the outer rim 30 and the inner rim 40 can be supported. Without causing damage, the vehicle can run temporarily under load during puncture. Further, during puncturing, the presence of the gap 56 causes the presence or absence of contact between the blades 54A to 54C and the ground alternately to generate a slight impact and transmit it to the driver. It can be sensed and stopped safely. Further, in the gap 56, as shown in FIG. 3B, the blades on both sides of the gap 56, for example, the line connecting the corners 58 of the blades 54A and 54B, and the outer edges of the blades 54A and 54B are provided. The maximum diameter DP2 of the insertion plate 50 is shortened by the length of the distance a generated between the circumference and the circular arc. That is, the maximum diameter when FIG. 3B is viewed from the direction of the arrow FB is represented by DP2-a. In this way, by partially shortening the diameter by the distance a, it is possible to easily perform the interpolation work to the tire 12 as will be described later. Further, by adjusting the length of the distance a, that is, by adjusting the width of the gap 56 between the plurality of blades, it is possible to adjust the degree of impact due to contact with the ground.

  Next, the dimensional relationship between the insertion plate 50 and the tire 12 will be described. In inserting the insertion plate 50 inside the tire 12, the sum of the inner diameter DT1 of the tire 12 and the inner depth DT3 of the tire 12 is substantially equal to the maximum diameter DP2 of the insertion plate 50, and the inner diameter of the tire 12 DT1 needs to be set to be substantially equal to the sum of the disk diameter DP1 of the insertion plate 50 and the radial length DP3 of the blades 54A to 54C. That is, it is necessary to satisfy the relationship of DT1 + DT3≈DP2, and DT1≈DP1 + DP3. By setting so as to satisfy such a relationship, it becomes easy to insert the insertion plate 50 into the tire 12 by a procedure described later. The outer rim 30, the inner rim 40, and the insertion plate 50 as described above are generally formed of a metal such as iron, aluminum, or titanium, but other various known materials can be used.

  Next, the operation of this embodiment will be described. First, the assembly procedure of the wheel 10 and the tire 12 according to the present embodiment will be described with reference to FIG. 4. As shown in FIG. 4A, the entire insertion plate 50 is inclined, and the blades 54 </ b> A are moved toward the inner diameter of the tire 12. As shown by the arrow F4a from the portion, the tire 12 is inserted inside. Next, as shown in FIG. 4B, the insertion plate 54 is moved to one side so that the corners 58 of the inserted blades 54 </ b> A are in contact with the inside of the tire 12. Then, the blades 54 </ b> A and 54 </ b> B sandwich the tire 12 from the inside and the outside, and the outer edge portion of the remaining blade 54 </ b> C is positioned at the inner diameter portion of the tire 12. Here, as described above, the inner diameter DT1 of the tire 12 is set to be substantially equal to the sum of the disk diameter DP1 of the insertion plate 50 and the radial length DP3 of the blade 54, that is, satisfy the relationship of DT1≈DP1 + DP3. Therefore, when the insertion plate 50 is rotated in the direction indicated by the arrow F4b in FIG. 4B, the blades 54C are housed inside the tire 12 as shown in FIG. In this state, the blades 54 </ b> A and 54 </ b> C are inside the tire 12, and the blade 54 </ b> B is outside the tire 12. Then, as shown in FIG. 4C, the blades 54A and 54C are pressed against the inside of the tire 12 and rotated as indicated by an arrow F4c. Then, as described above, the sum of the inner diameter DT1 and the inner depth DT3 of the tire 12 is substantially equal to the maximum diameter DP2 of the insertion plate 50, that is, satisfies the relationship of DT1 + DT3≈DP2, and therefore into the tire 12. The blade 54B can be dropped. Here, in addition to the dimensional relationship described above, due to the existence of the distance a caused by the gap 56, the last drop of the blade 54B is performed more satisfactorily.

  When the insertion of the insertion plate 50 is completed as described above, the bolt end 60A side is inserted into the bolt hole 38 of the outer rim 30 and screwed into the nut 66 as shown in FIG. The outer rim 30 is fixed by the above. Further, the inner rim 40 is fixed by inserting the bolt end portion 60 </ b> B into the bolt hole 48 of the inner rim 40 and screwing it with the nut 68. Then, when the tire 12 is filled with air until a predetermined pressure is reached and the bead portion 12A is fixed by the flange portion 34 of the outer rim 30 and the flange portion 46 of the inner rim 40, the assembly of the tire is completed. Finally, by inserting the embedded bolt 24 of the housing 22 into the bolt hole 62 of the insertion plate 50 and screwing the nut 26 from the end, the tire (the wheel 10 with the tire 12) is attached and fixed to the axle 16. Is done. In the present embodiment, since it is set so as to satisfy the dimensional relationship of each part described above, when assembled, the distance from the blade 54 to the inside of the tread part 12B as shown in FIG. 3C. b is half of the inner depth DT3 of the tire. However, if the operation is performed while deforming the bead portion 12A, the insertion plate 50 having a larger dimension can be inserted, and the distance 10 is shortened to reduce the wheel 10. The load applied to can be reduced.

  When the tire 12 is running as described above and the internal pressure of the tire 12 decreases due to puncture or the like, the curved surface portion 55 of the edges of the blades 54A to 54C receives a load to support the tire 12 from the inside, It is possible to run temporarily. At this time, since the gaps 56 are formed between the blades 54A to 54C, an impact is generated by contact with the ground. The vibration is transmitted to the driver of the vehicle, so that the abnormality of the tire can be promptly detected and the vehicle can be stopped safely. Further, since one of the bead portions 12 </ b> A is sandwiched between the flange portion 34 of the outer rim 30 and the inner insertion plate 50, the tire 12 can travel safely without being detached from the wheel 10. When repairing the tire 12, with the vehicle body lifted with a jack or the like, the nut 66 is loosened to remove the outer rim 30. To grasp.

Thus, according to the first embodiment, there are the following effects.
(1) An insertion plate 50 having blades 54 </ b> A to 54 </ b> C that protrudes in the radial direction and is provided with a gap 56 in the circumferential direction is connected to the outer rim 30 and the inner rim 40 that hold the bead portion 12 </ b> A of the tire 12. The wheel 10 is configured by being fixed in between. When the internal pressure of the tire 12 is reduced, the tire 12 is supported from the inside while receiving a load by the blades 54A to 54C of the insertion plate 50 having an outer diameter larger than the rims 30 and 40. For this reason, the impact generated by the gap 56 is transmitted to the driver so that the occurrence of an abnormality in the tire 12 can be quickly detected, and the vehicle can be safely stopped before the tire 12 and the rims 30 and 40 are damaged. it can.

  (2) Since each part of the outer rim 30, the inner rim 40, and the inner insertion plate 50 can be divided, the tire can be easily assembled to the wheel 10, and only the outer rim 30 can be removed without removing the entire tire from the vehicle body. By detaching and shifting the position of the tire 12, the damaged portion can be easily grasped and inspected. Furthermore, by forming each part into a divided structure, the shape and size of the inner rim 40 can be formed in consideration of the shape and size of a disc brake or drum brake whose shape and size are determined by standards. Therefore, it can be easily attached to automobiles already sold, and is highly versatile.

  (3) The outer rim 30, the inner rim 40, and the insertion plate 50 can be divided, and the shape and size of the insertion plate 50 are set so as to satisfy a predetermined relationship with the dimensions of the tire 12. It was decided to. That is, the inner diameter or rim diameter of the tire 12 is DT1, the cross-sectional height of the tire is DT2, the thickness of the tire 12 is Tt, the inner depth DT3 of the tire 12 is expressed by DT3 = DT2-Tt, When the diameter of the disk portion of the insertion plate 50 is DP1, the maximum diameter of the insertion plate 50 is DP2, and the radial length DP3 of the blades 54A to 54C is expressed by DP3 = (DP2-DP1) / 2 , DT1 + DT3≈DP2, and DT1≈DP1 + DP3 are set so as to satisfy the relationship, the tire 12 can be easily assembled.

(4) Since the projections 64 and 65 for positioning the inner rim 40 and the outer rim 30 are provided on the inner insertion plate 50, the inner plate 50 is displaced from the outer rim 30 and the inner rim 40. Can be prevented.
(5) Since one of the bead portions 12A of the tire 12 is sandwiched and fixed by the flange portion 34 of the outer rim 30 and the insertion plate 50, the tire 12 does not come off the wheel 10 even when punctured. Stability can be increased.

  Next, Embodiment 2 of the present invention will be described with reference to FIG. In the first embodiment described above, the three blades 54A to 54C are provided on the insertion plate 50, but this embodiment is an example in which the number of blades is increased or decreased. Like the insertion plate 70 shown in FIG. 5A, two small blades 74A and 74B are provided on the outer periphery of the disk portion 72 so that the gap 76 is enlarged (that is, the distance a is increased). If formed, the tire 12 can be inserted, but when the internal pressure of the tire 12 is reduced, the impact received from the ground is increased and lacks practicality. For this reason, when two blades are used, the impact is reduced by reducing the gap 76 and forming the blades 74A and 74B to be larger as in the insertion plate 78 shown in FIG. 5B. As a result, the running performance can be improved. Further, the same effects as those of the first embodiment described above can be obtained even when the four blades 74A to 74D are provided as in the insertion plate 79 shown in FIG. Also in this embodiment, the insertion into the tire 12 is facilitated by setting the size of the insertion plate with respect to the tire 12 so as to satisfy the same relationship as in the first embodiment. Other operations and effects are basically the same as those of the first embodiment described above.

In addition, this invention is not limited to the Example mentioned above, A various change can be added in the range which does not deviate from the summary of this invention. For example, the following are also included.
(1) The shape and size of the above-described embodiment is an example, and may be appropriately changed so as to achieve the same effect. The material constituting each part is also an example, and may be formed using various known materials.

  (2) The dimensional relationship between the tire 12 and the insertion plate 50 shown in the above embodiment is an example, and may be appropriately changed so as to achieve the same effect. For example, in the above-described first embodiment, as shown in FIG. 3C, the insertion plate 50 can be inserted up to half the depth of the tire 12, but if the bead portion 12 can be deformed, the above-described implementation is possible. An insertion plate 50 larger than the example can be inserted, and the load applied at the time of puncture can be reduced.

  (3) The shape of the blades 54A to 54C shown in the above embodiment is also an example, and may be appropriately changed so as to achieve the same effect. For example, as in the insertion plate 80A shown in FIG. 6A, the curved surface portion 84 of the edge of the blade 82 is extended so as to reach the center portion in the width direction of the tire 12, and the load at the time of puncture is extended by the curved surface portion 84. You may make it receive. Further, as shown in FIG. 6B, the cross-sectional shape of the blade 86 and the curved surface portion 88 may be formed to be substantially L-shaped, or the blade 90 and the curved surface portion 92 shown in FIG. In this manner, the cross section may be formed in a substantially T shape, and the curved portion 88 or 92 may receive a load at the time of puncture. Furthermore, as shown in FIG. 6 (C), when the curved surface portion 92 is covered with, for example, a rubber cap 94, the insertion plate can be protected from an impact when receiving a load, More effective.

  (4) The method of attaching the insertion plate 50, the outer rim 30 and the inner rim 40 and the method of fixing the insertion plate 50 and the axle 16 shown in the above embodiment are examples, and the same effect can be obtained. For example, various known attachment methods and fixing methods may be applied. Each part of the outer rim 30, the inner rim 40, and the inner insertion plate 50 is structured so that if the outer rim 30 is removed when the outer rim 30 is removed, the inner insertion plate 50 and the inner rim 40 are all removed. This is convenient for inspection.

  (5) The wheel of the present invention is used as a wheel of an automobile tire, and can be applied to either a four-wheeled vehicle or a two-wheeled vehicle.

  According to the present invention, the insertion plate that protrudes in the radial direction and has a plurality of blade portions provided at predetermined intervals in the circumferential direction is fixed between the outer rim and the inner rim, and the insertion plate Is set larger than the maximum diameter of each rim. In addition, since the shape and size of the insertion plate is set so as to satisfy a predetermined relationship with the tire dimensions, it is possible to detect puncture early and to stop the vehicle safely. It can be applied as a tire with a function of notifying the driver of abnormality. In particular, by making each of the above parts separable, the tire can be easily assembled and inspected, and the inner rim can be formed in a shape and size corresponding to a standard brake or the like. It is also suitable for the purpose of attachment to a general vehicle.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows Example 1 of this invention, (A) is a top view, (B) is sectional drawing which cut | disconnected said (A) along the # A- # A line and looked at the arrow direction. It is a disassembled perspective view which shows the structure of the said Example 1. FIG. It is a figure which shows the dimensional relationship of the wheel of the said Example 1, and a tire. It is a figure which shows the mode of the assembly | attachment of the wheel of the said Example 1, and a tire. It is a figure which shows the insertion board of Example 2 of this invention. It is a figure which shows the other Example of this invention.

Explanation of symbols

10: Wheel 12: Tire 12A: Bead portion 12B: Tread portion 14: Bead wire 16: Axle 18: Disc rotor 20: Brake movable portion 22: Housing 24: Bolt 26: Nut 30: Outer tire bead fixing rim (outer rim)
31: Opening portion 32: Plane portion 34: Flange portion 36: Bead receiving portion 38: Bolt hole 40: Inner tire bead fixing rim (inner rim)
41: Opening part 42: Plane part 44: Side part 46: Flange part 48: Bolt hole 50: Insertion plate 52: Disk part 54A-54C: Blade 55: Curved part 56: Gap 58: Corner part 60: Bolt 60A 60B: End 62: Bolt hole 64, 65: Protrusion 66, 68: Nut 70, 78, 79: Insertion plate 72: Disk portion 74A to 74D: Blade 75: Corner portion 76: Clearance 80A to 80C: Insertion plate 82, 86, 90: Blades 84, 88, 92: Plane portion 94: Cap DR: Rim diameter DR1, DR2: Maximum rim diameter WR: Rim width WR1: Bead receiving portion width WR2: Side width DP1: Disc diameter DP2: Inside Insertion plate maximum diameter DP3: radial length DT1: tire inner diameter DT2: tire (cross-section) height DT3: tire (cross-section) depth Tt: tire thickness Tp: insert thickness

Claims (5)

A wheel attached to the axle,
A plane portion that is substantially perpendicular to the axle, a substantially cylindrical side surface portion along the axial direction of the axle, and a flange portion that holds one of the tire bead portions on the open end side of the side surface portion. An inner rim disposed on the axle side,
An outer rim having a flat portion substantially perpendicular to the axle, and a flange portion provided at an edge of the flat portion and holding the other bead portion of the tire;
The disc is sandwiched between the flat portions of the inner rim and the outer rim, and is fixed to the axle. The disc portion projects radially from the edge of the disc portion and has a predetermined interval in the circumferential direction. And an insertion plate formed integrally with the disk portion and a blade portion having a substantially concentric arc as a part of the outer edge,
With
The maximum diameter of the insertion plate is set to be larger than the maximum diameter of the inner rim and the outer rim, and smaller than the maximum diameter of the inner side of the tire, and when the internal pressure of the tire is reduced, A wheel characterized in that a tread portion of the tire is supported from the inside by a curved surface portion of an outer edge of a blade portion.   The wheel according to claim 1, wherein each of the inner rim, the insertion plate, and the outer rim can be divided. The inner diameter or rim diameter of the tire is DT1, the cross-sectional height of the tire is DT2, the tire thickness is Tt, and the inner depth DT3 of the tire is represented by DT3 = DT2-Tt,
When the diameter of the disk portion of the insertion plate is DP1, the maximum diameter of the insertion plate is DP2, and the radial length DP3 of the blade portion is represented by DP3 = (DP2-DP1) / 2,
DT1 + DT3≈DP2, and DT1≈DP1 + DP3
The wheel according to claim 1, wherein the relationship is satisfied.   The wheel according to any one of claims 1 to 3, wherein positioning means for at least one of the inner rim and the outer rim is provided on a surface of the insertion plate. The wheel according to any one of claims 1 to 4, wherein a bead portion outside the tire is sandwiched between a flange portion of the outer rim and the insertion plate.

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