WO2022130969A1

WO2022130969A1 - Vehicle wheel

Info

Publication number: WO2022130969A1
Application number: PCT/JP2021/043961
Authority: WO
Inventors: 好秀河野; 誓志今
Original assignee: 株式会社ブリヂストン
Priority date: 2020-12-14
Filing date: 2021-11-30
Publication date: 2022-06-23
Also published as: JP2022093862A

Abstract

A vehicle wheel comprising: two annular rim members that are arranged on the same axis; one or more annular flange members that are located between the two rim members and that are arranged so as to have the same axis of rotation as that of the two rim members; a plurality of body springs that are arranged side by side in the width direction of the vehicle wheel by joining, among the two rim members and the one or more flange members, members adjacent to each other in the width direction of the vehicle wheel, when being mounted to members adjacent to each other in the width direction of the vehicle wheel among the two rim members and the one or more flange members; and a plurality of outer springs that are linked to the body springs so as to connect to peak portions, protruding in an axially outward direction of the vehicle wheel, of the plurality of body springs arranged side by side in the width direction of the vehicle wheel.

Description

Wheel

The present invention relates to wheels.

Conventionally, tires configured using coil springs are known. For example, Patent Document 1 discloses a tire in which each of a plurality of coil springs is combined with another coil spring and fixed to an annular rim to form a toroidal shape as a whole.

International Publication No. 2010/138150

However, as disclosed in Patent Document 1, a wheel having only one toroidal-shaped tire may not be able to support the load when the load on the wheel becomes large. In particular, when the tire is composed of a coil spring as in the tire disclosed in Patent Document 1, when a certain force or more is applied to the coil spring, the coil spring buckles and functions as a tire. May not be exhibited.

On the other hand, it is conceivable to improve the load capacity and support the load by using multiple wheels. However, in this case, since the contact area of each wheel is limited, it is difficult to drive depending on the road surface environment. For example, when traveling on soft ground, since the ground contact area of the wheels is small, a strong force is applied from the wheels to the road surface, and the wheels are buried in the road surface, which may make traveling difficult.

An object of the present invention is to provide a wheel configured by using a spring, which can support a large load and secure a wide ground contact area.

The wheel of the present invention is a wheel, and is arranged so that two annular rim members arranged on the same axis and the two rim members and the rotation axis are the same, and are between the two rim members. By being attached to one or more annular flange members arranged in the wheel, and the two rim members and the one or more flange members adjacent to each other in the width direction of the wheel, the two members are attached to each other. A plurality of main body springs arranged side by side in the width direction of the wheel by connecting adjacent members of the wheel among the rim member and the one or more flange members, and a plurality of body springs arranged side by side in the width direction of the wheel. A plurality of outer springs connected to the main body spring so as to connect the tops of the plurality of main body springs arranged in the wheel so as to project radially outwardly.

According to the present invention, it is possible to provide a wheel configured by using a spring, which can support a large load and secure a wide contact area.

It is external perspective view of the wheel which concerns on one Embodiment of this invention. It is external perspective view of the wheel part of the skeleton part of the wheel of FIG. It is the schematic which shows the position of the bolt hole of the rim member of the wheel part of FIG. It is a schematic diagram which shows the counterbore processing in the 1st member of FIG. It is a schematic diagram which shows the mounting mode of the main body spring with respect to the rim member and the flange member of FIG. It is a schematic diagram which shows one modification of the rim member. It is the schematic which shows the structure of the ground contact deformation part of the skeleton part of the wheel of FIG. 1 schematically. It is a figure for demonstrating an example of the connection method between springs. It is a figure for demonstrating an example of the connection method between springs. It is a schematic diagram which shows the state which the tread member is attached to the skeleton part. It is a schematic diagram which shows one modification of the tread member. It is a schematic diagram which shows one modification of the tread member. It is a schematic diagram which shows another modification of the tread member. It is a schematic diagram which shows another modification of the tread member. It is a schematic diagram schematically showing the structure of the ground contact deformation part of the skeleton part of the wheel provided with three main body springs. It is a schematic diagram which shows an example of a regulation member. It is the schematic which shows the example of the coupling between the main body springs using the regulation member of FIG.

Hereinafter, embodiments of the present invention will be exemplified with reference to the drawings.

FIG. 1 is an external perspective view of a wheel 1 according to an embodiment of the present invention. The wheel 1 is composed of a skeleton portion 2 and a tread portion 3. Specifically, as shown in FIG. 1, the wheel 1 has a skeleton portion 2 having a tread portion 3 mounted on the radial outer side of the skeleton portion 2, so that the wheel 1 is radially outer. Is configured to be covered by the tread portion 3. The radial direction of the wheel 1 means a direction orthogonal to the rotation axis of the wheel 1.

The skeleton portion 2 is composed of a wheel portion and a ground deformation portion that can be deformed to the ground. FIG. 2 is an external perspective view of the wheel portion 10 of the skeleton portion 2 of the wheel 1 of FIG. The members constituting the wheel portion 10 are made of metal or resin. As shown in FIG. 2, in the present embodiment, the wheel portion 10 includes two

rim members

11a and 11b and one flange member 12. The

rim members

11a and 11b and the flange member 12 are all formed in an annular shape having the same outer diameter. The

rim members

11a and 11b and the flange member 12 are all arranged so that their rotation axes are on the same axis. Specifically, the rotation axis of the

rim members

11a and 11b and the flange member 12 coincides with the rotation axis of the wheel 1. The flange member 12 is arranged between the two

rim members

11a and 11b. The outer diameters of the

rim members

11a and 11b and the flange member 12 are appropriately determined according to the required size of the wheel 1.

The rim member 11a and the flange member 12 are fixed by a plurality of fixing members 13. Further, the rim member 11b and the flange member 12 are fixed by a plurality of fixing members 13. In the example shown in FIG. 2, the rim member 11a and the flange member 12, and the rim member 11b and the flange member 12 are each fixed by six fixing members 13. In the present embodiment, the fixing member 13 is a rod-shaped member and is arranged so as to extend in the width direction of the wheel 1. Due to the fixing member 13, the relative positions of the adjacent members (here, the rim member 11a and the flange member 12, and the flange member 12 and the rim member 11b) of the

rim members

11a and 11b and the flange member 12 are relative to each other. The relationship is fixed. As a result, the relative positional relationship between the

rim members

11a and 11b and the entire flange member 12 is fixed.

Spoke members

14a and 14b are attached to the

rim members

11a and 11b, respectively. As shown in FIG. 2, the

spoke members

14a and 14b of the present embodiment each have six spokes 15, and these six spokes 15 are fixed to the

rim members

11a and 11b. The

spoke members

14a and 14b are attached to the

rim members

11a and 11b, respectively. Since the skeleton portion 2 includes the

spoke members

14a and 14b, the strength of the wheel 1 can be improved.

As shown in FIG. 2, in the present embodiment, the

spoke members

14a and 14b each have six further sub-spokes 16. By fixing the six sub-spokes 16 to the flange member 12, the

spoke members

14a and 14b are also attached to the flange member 12. The

spoke members

14a and 14b do not have to include the sub-spokes 16. In this embodiment, the

spoke members

14a and 14b further have an annular portion to which the spokes 15 and the sub-spokes 16 are connected.

The

rim members

11a and 11b are provided with bolt holes for fixing the fixing member 13 and the spokes 15. FIG. 3 is a schematic view showing the positions of bolt holes of the rim member 11a, and is a schematic view when the rim member 11a is viewed from the width direction of the wheel 1. However, in FIG. 3, in the

rim members

11a and 11b, the description of the radial outer portion is omitted.

As shown in FIG. 3, the rim member 11a is provided with first bolt holes 17a for the six fixing members 13. The first bolt holes 17a are provided corresponding to the positions of the fixing members 13 of the rim member 11a, and in the present embodiment, they are provided at equal intervals along the circumferential direction of the rim member 11a. In the present embodiment, since the rim member 11a has six first bolt holes 17a, first bolt holes 17a are provided every 60 degrees around the central shaft (rotary shaft of the wheel 1). The fixing member 13 is fixed to the rim member 11a by using a bolt in the first bolt hole 17a.

Further, the rim member 11a is provided with a second bolt hole 17b for the six spokes 15. The second bolt holes 17b are provided corresponding to the positions of the spokes 15 of the spoke member 14a, and in the present embodiment, they are provided at equal intervals along the circumferential direction of the rim member 11a. Further, in the present embodiment, the second bolt hole 17b is provided at the center of the two first bolt holes 17a. The spoke member 14a is fixed to the rim member 11a by fixing the spokes 15 to the rim member 11a using bolts in the second bolt hole 17b.

The rim member 11b may also have a first bolt hole 17a and a second bolt hole 17b at the same position as the rim member 11a described with reference to FIG. Further, the flange member 12 also has a first bolt hole 17a and a second bolt hole 17b, similarly to the rim member 11a described with reference to FIG. 3, in the first bolt hole 17a and the second bolt hole 17b. , The fixing member 13 and the

spoke members

14a and 14b may be bolted. The second bolt hole 17b of the flange member 12 is used for fixing the sub-spokes 16 of the

spoke members

14a and 14b with bolts. When the

spoke members

14a and 14b do not have the sub-spokes 16, the flange member 12 does not have to have the second bolt hole 17b.

In the present embodiment, the flange member 12 is formed by joining two members. Specifically, the flange member 12 is formed by connecting the first member 12a and the second member 12b. The first member 12a and the second member 12b are members having the same shape, and are formed by fixing them in opposite directions, that is, back to back. When the flange member 12 is composed of two members, when assembling the wheel 1, the main body spring described later may be attached to the flange member 12, and then the two members may be joined to form the flange member 12. Because it can be done, it becomes easier to work.

The flange member 12 may be formed of an integral member. When the flange member 12 is composed of an integral member, it is not necessary to assemble the flange member 12 when assembling the wheel 1, so that the work process can be reduced.

When the flange member 12 is formed of two members as in the present embodiment, a counterbore 18 is provided in the first bolt hole 17a for the fixing member 13 in the first member 12a and the second member 12b. You may be. Specifically, as schematically shown for the first member 12a in FIG. 4, the counterbore 18 is formed on the surface 19 of the first member 12a that comes into contact with the second member 12b when the first member 12a is coupled to the second member 12b. May be done. The size of the counterbore 18 may be appropriately determined according to the size of the bolt used for fixing the fixing member 13, and it is preferable that the bolt does not protrude from the surface 19. The second member 12b may be configured in the same manner as the first member 12a. As a result, when the first member 12a and the second member 12b are connected, the bolts that fix the fixing member 13 do not interfere with each other on the connecting surface (surface 19).

A main body spring is attached to the

rim members

11a and 11b and the flange member 12 of the wheel portion 10. The main body spring is one of the members constituting the grounding deformation portion of the skeleton portion 2. The main body spring connects the adjacent members of the

rim members

11a and 11b and the flange member 12 by being attached to the adjacent members.

Here, with reference to FIG. 5, the mounting mode of the main body spring 21 on the

rim member

11a or 11b and the flange member 12 will be described. FIG. 5 is a schematic view showing how the main body spring 21 is attached to the rim member 11a and the flange member 12, and is a schematic cross-sectional view of the skeleton portion 2 including the main body spring 21 in the width direction. In FIG. 5, a main body spring 21, a rim member 11a, and a part of the first member 12a are shown. In FIG. 5, a part of the center of the main body spring 21 is shown in a simplified manner.

In the present embodiment, the main body spring 21 is attached so as to connect the rim member 11a and the first member 12a as schematically shown in FIG. Further, the main body spring 21 is attached so as to connect the rim member 11b and the second member 12b, as in FIG. In the present embodiment, the mounting mode of the main body spring 21 is the same between the rim member 11a and the first member 12a and between the rim member 11b and the second member 12b. Therefore, here, the rim member 11a is used. The mounting mode between the first member 12a and the first member 12a will be described.

In this embodiment, the main body spring 21 is made of metal. The main body spring 21 has an elastic deformation portion 22 and a locking portion 23.

In this embodiment, the elastic deformation portion 22 is composed of a coil spring. Here, the coil spring is a spring that elastically deforms in response to a load, and is a spring that is wound in a coil shape (spiral shape) around a shaft A (the shaft of the main body spring 21). As the elastically deformed portion 22, an elastically deformed portion 22 having an appropriate material and elasticity can be used depending on the desired size and weight of the wheel 1, the required properties of the grounded deformed portion, and the like.

The locking portion 23 is provided at both ends of the elastically deforming portion 22. The locking portion 23 locks the main body spring 21 to the wheel portion 10. The locking portion 23 has a shape different from that of the elastically deformed portion 22. That is, in the present embodiment, the locking portion 23 has a shape different from the coil shape.

In the present embodiment, the locking portion 23 is composed of a member integrated with the elastically deforming portion 22. That is, in the present embodiment, for example, as shown in FIG. 5, the material constituting the elastically deformed portion 22 extends from both ends of the elastically deformed portion 22, and constitutes the locking portion 23.

In the present embodiment, for example, as shown in FIG. 5, the locking portion 23 includes a linearly formed straight portion 23a connected to both ends of the elastically deformed portion 22. Further, in the present embodiment, for example, as shown in FIG. 5, the locking portion 23 includes a bent portion 23b bent with respect to the straight portion 23a on the tip end side of the straight portion 23a. In the present embodiment, the bent portion 23b is bent so as to be orthogonal to the straight portion 23a in the side view of the main body spring 21 (in the plane including the axis A of the main body spring 21).

In the present embodiment, the rim member 11a and the first member 12a have an engaging receiving portion into which the bent portion 23b of the locking portion 23 can be inserted on the side where the fixing member 13 connecting them extends. In the present embodiment, the engaging receiving portion is configured as a bottomed hole into which the bent portion 23b of the locking portion 23 can be inserted. By inserting the bent portion 23b into the hole as the engagement receiving portion, the main body spring 21 is engaged with the rim member 11a and the first member 12a at both ends. In the example shown in FIG. 5, the hole of the engagement receiving portion is formed so as to extend in the width direction of the wheel 1. The length of the hole in the engaging receiving portion in the extending direction (depth of the hole) is preferably the same as or longer than the length of the bent portion 23b. As a result, the entire bent portion 23b can be inserted into the engaging receiving portion, and the engaged state is easily stabilized. The engaging receiving portion may be configured as a bottomless hole (through hole).

The cross-sectional shape of the hole of the engagement receiving portion is not limited as long as the bent portion 23b is inserted, and may be, for example, an oval shape, an elliptical shape, a rectangular shape, a polygonal shape, or the like. In order for the elastically deformed portion 22 to be more reliably locked (fixed), it is preferable that the shape and size of the cross section of the hole are substantially the same as the shape and size of the cross section of the bent portion 23b.

In the present embodiment, as shown in FIG. 5, the locking portions 23 at both ends of the main body spring 21 are arranged at the same position in the radial direction of the wheel 1. The locking portions 23 at both ends of the main body spring 21 may be arranged at different positions in the radial direction of the wheel 1.

As shown in FIG. 5, in a state where the bent portion 23b is engaged with the engaging receiving portion, the straight portion 23a is placed on the surfaces of the rim member 11a and the first member 12a from the position of the engaging receiving portion. Along the route, the wheels 1 are arranged so as to extend radially outward. In this way, as shown in FIG. 5, in the main body spring 21, a part (for example, the central portion) in the width direction of the wheel 1 is radially outside the wheel 1 with respect to the rim member 11a and the first member 12a. Protruding to. As a result, the load on the wheel 1 is supported by the main body spring 21.

As shown in FIG. 5, the rim member 11a and the first member 12a are formed with a groove 20 capable of accommodating the straight portion 23a on the surface, and the straight portion 23a may be accommodated in the groove 20. .. By providing the groove 20 in this way, the mounting state of the straight portion 23a in the rim member 11a and the first member 12a is stabilized.

In the present embodiment, as shown in FIG. 5, in the main body spring 21, the shaft A of the main body spring 21 extends outward in the radial direction from the peripheral portions of the rim member 11a and the first member 12a. As described above, they are attached to the peripheral edges of the rim member 11a and the first member 12a. The peripheral edge portion of the rim member 11a and the first member 12a means a radial outer end portion of the wheel 1 in the rim member 11a and the first member 12a. In this way, the shaft A of the main body spring 21 is attached to the peripheral edges of the rim member 11a and the first member 12a so as to face the radial outer side of the wheel 1, so that the load on the wheel 1 is applied to the main body spring 21. Can be supported in the axis A direction. Therefore, the load can be supported by making maximum use of the elastic force of the main body spring 21.

In the present embodiment, the axis A of the main body spring 21 has a radial angle of 0 ° at the peripheral edge portion. The axis A of the main body spring 21 does not necessarily have an angle formed in the radial direction at the peripheral edge portion of 0 °. The shaft A of the main body spring 21 preferably has a radial angle of 30 ° or less at the peripheral edge portion. Also in this case, the load can be supported by utilizing the elastic force of the main body spring 21. The axial angle of the shaft A of the main body spring 21 is more preferably 20 ° or less, and further preferably 10 ° or less in the radial direction. It is preferable that the axis A of the main body spring 21 has an angle formed in the radial direction close to 0 ° at the peripheral edge portion. This is because the closer to 0 °, the more the elastic force of the main body spring 21 is utilized.

The plurality of main body springs 21 are provided at intervals from each other over the entire circumferential direction of the wheel 1. That is, in the main body spring 21, the locking portion 23 is engaged with the rim member 11a and the first member 12a in the above-described manner over the entire circumference of the wheel portion 10. The quantity and spacing of the main body spring 21 engaged with the rim member 11a and the first member 12a may be appropriately determined according to the size and weight of the wheel 1, the required properties of the ground contact deformed portion, and the like. ..

Further, an engagement assisting member (not shown) is attached to the wheel portion 10 to assist the engaged state of the bent portion 23b engaged with the engaging receiving portion from the side on which the fixing member 13 extends. May be. The engagement assisting member is composed of, for example, a plate-shaped member, is fixed to the rim member 11a and the first member 12a, and supports the bent portion 23b so as not to come out of the hole as the engagement receiving portion. When the engagement assisting member is provided, the engagement state of the locking portion 23 with the rim member 11a and the first member 12a becomes more stable.

In the

rim members

11a and 11b and the first member 12a and the second member 12b, the form of the hole of the engaging receiving portion engaged with the bent portion 23b of the main body spring 21 is not limited to that shown in FIG. For example, in the example shown in FIG. 5, the hole of the engagement receiving portion is formed so as to extend along the width direction of the wheel 1 (that is, at an angle of 0 ° with respect to the width direction of the wheel 1). I explained that there is. However, the hole of the engagement receiving portion does not necessarily have to be formed so as to extend along the width direction of the wheel 1. FIG. 6 is a schematic view showing a modified example of the rim member 11a. As shown as an example in FIG. 6, the hole of the engagement receiving portion may be formed so as to extend in a direction inclined with respect to the width direction of the wheel 1. Similarly, with respect to the first member 12a, the second member 12b, and the rim member 11b, the hole of the engagement receiving portion may be formed so as to extend in a direction inclined with respect to the width direction of the wheel 1. Also in this case, by inserting the bent portion 23b into the hole of the engaging receiving portion, the main body spring 21 can be engaged with the

rim members

11a and 11b and the first member 12a and the second member 12b.

In the skeleton portion 2 of the wheel 1 according to the present embodiment, the plurality of main body springs 21 engaged with the wheel portion 10 in this way are connected to the outer spring to form a ground contact deformed portion. One outer spring is connected to two main body springs 21 adjacent to each other in the circumferential direction of the wheel 1 at two main body springs 21 arranged in the width direction of the wheel 1 in the cross-sectional view of the wheel 1. In this embodiment, the outer spring is partially connected to the ground plane spring. Further, in the present embodiment, the main body spring 21 is partially connected to the auxiliary spring, which is not connected to the outer spring. That is, the skeleton portion 2 of the wheel 1 according to the present embodiment has a ground contact deformed portion formed by the main body spring 21, the outer spring, the ground contact surface spring, and the auxiliary spring.

FIG. 7 is a schematic view schematically showing the configuration of the ground contact deformation portion of the skeleton portion 2 of the wheel 1, and is a schematic cross-sectional view of the skeleton portion 2 in the width direction of the wheel 1. In FIG. 7, the range in which the main body spring 21, the outer spring 24, the ground contact surface spring 25, and the auxiliary spring 26 extend in the cross-sectional view in the width direction of the wheel 1 is simplified and shown by solid lines. That is, in FIG. 7, the shapes (spiral shapes) of the main body spring 21, the outer spring 24, the ground plane spring 25, and the auxiliary spring 26 as springs are not shown, and the springs are simplified by solid lines.

In the present embodiment, as shown in FIG. 7, the skeleton portion 2 includes two main body springs 21. Of the two main body springs 21, the first main body spring 21a is attached so as to connect the rim member 11a and the first member 12a. Specifically, as described with reference to FIG. 5, one end of the first main body spring 21a is attached to the rim member 11a, the other end is attached to the first member 12a, and the center is the wheel 1. It protrudes outward in the radial direction. Similarly, of the two main body springs 21, the second main body spring 21b is attached so as to connect the rim member 11b and the second body member 12b. That is, one end of the second main body spring 21b is attached to the rim member 11b, the other end is attached to the second member 12b, and the center protrudes outward in the radial direction of the wheel 1. Here, in the first main body spring 21a, the portion protruding most radially outward is referred to as the first top portion 31a, and in the second main body spring 21b, the portion protruding most radially outward is referred to as the second top portion 31b.

The outer spring 24 is connected to two main body springs 21 (that is, a first main body spring 21a and a second main body spring 21b). Specifically, the outer spring 24 is connected to the first main body spring 21a on one end side and is connected to the second main body spring 21b on the other end side. The outer spring 24 is connected to a portion of the main body spring 21 (first main body spring 21a and second main body spring 21b in the present embodiment) mounted on the

rim members

11a and 11b on the outer side in the width direction of the wheel 1. That is, the outer spring 24 is connected to a portion outside the width direction of the first top portion 31a of the first main body spring 21a on one end side, and is wider than the second top portion 31b of the second main body spring 21b on the other end side. It is connected to the part outside the direction. The location outside the width direction of the wheel 1 of the main body spring 21 means the top of each of at least two main body springs 21 arranged in the width direction of the wheel 1 or the portion outside the width direction of the wheel 1 from the top thereof. .. In the present embodiment, as shown in FIG. 7, the outer spring 24 has a range from the first top portion 31a of the first main body spring 21a to the front of the portion mounted on the rim member 11a on one end side. 1 Connect with the main body spring 21a. Similarly, as shown in FIG. 7, the outer spring 24 has a second portion on the other end side in a range from the second top portion 31b of the second main body spring 21b to the front of the portion mounted on the rim member 11b. It is connected to the main body spring 21b.

The outer spring 24 is connected to the main body spring 21 so as to regulate the relative displacement between the main body springs 21. That is, in the present embodiment, the outer spring 24 functions as a regulating member that regulates the relative displacement between the main body springs 21 adjacent to each other in the circumferential direction of the wheel 1. Specifically, the outer spring 24 is arranged between two main body springs 21 engaged in the wheel portion 10 and adjacent to each other in the circumferential direction, and is combined with these two main body springs 21 to form the main body spring 21. Is concatenated with.

In this embodiment, the outer spring 24 has an elastically deformed portion. The elastically deformed portion is composed of a coil spring. As the elastically deformed portion, an elastically deformed portion having an appropriate material and elasticity can be used depending on the desired size and weight of the wheel 1, the required properties of the grounded deformed portion, and the like. The diameter of the coil spring constituting the elastically deformed portion of the outer spring 24 is preferably close to the diameter of the coil spring constituting the elastically deformed portion 22 of the main body spring 21. Here, the diameter of the coil spring is the diameter of the circumscribed circle when the coil spring is viewed from the axial direction, and the same applies hereinafter. The closer the diameter of the coil spring constituting the elastically deformed portion of the outer spring 24 is to the diameter of the coil spring constituting the elastically deformed portion 22 of the main body spring 21, the more the coil spring constituting the elastically deformed portion 22 of the main body spring 21 and the coil spring. When the coil spring constituting the elastically deformed portion of the outer spring 24 is connected to form the grounded deformed portion as described later, the force is likely to be evenly applied. For example, the diameters of the coil springs constituting the elastically deformed portion 22 of the main body spring 21 and the coil springs constituting the elastically deformed portion of the outer spring 24 can both be 15 mm to 25 mm, for example, 20 mm.

8A and 8B are diagrams for explaining an example of a method of connecting springs to each other. Here, an example of a method of connecting the outer spring 24 to the main body spring 21 will be described with reference to FIGS. 8A and 8B. As shown in FIG. 8A, the outer spring 24 is hooked on the elastically deformed portion 22 of the main body spring 21 engaged with the wheel portion 10 with the two main body springs 21 adjacent to each other in the circumferential direction of the wheel 1. Assembled and connected to these two main body springs 21. Specifically, the outer spring 24 is connected to the main body spring 21 so as to regulate the relative displacement between the two main body springs 21 adjacent to each other in the circumferential direction of the wheel 1. At this time, the outer spring 24 is gradually combined with the two main body springs 21 adjacent to each other in the circumferential direction of the wheel 1 by being inserted into the main body spring 21 so as to move forward while rotating. In this way, as shown in FIG. 8B, the entire outer spring 24 is connected to the two main body springs 21.

In the present embodiment, in all the main body springs 21 engaged with the wheel portion 10, the outer spring 24 is arranged so that the outer spring 24 is arranged between the two main body springs 21 adjacent to each other in the circumferential direction of the wheel 1. Is concatenated with. That is, in the present embodiment, all the main body springs 21 of the ground deformation portion of the skeleton portion 2 are connected to the two outer springs 24, and all the outer springs 24 of the ground deformation portion of the skeleton portion 2 are two. It is connected to the main body spring 21. As described above, since the outer spring 24 is connected between the two main body springs 21 adjacent to each other in the circumferential direction of the wheel 1, the main body spring 24 is connected even when a load is applied to the skeleton portion 2. The distance between the 21 is not too wide, and it becomes easy to maintain the function as the wheel 1.

As shown in FIG. 7, in the present embodiment, the outer spring 24 is not connected to the main body spring 21 in the section between the first top portion 31a and the second top portion 31b. In the present embodiment, the outer spring 24 is located in the section between the first top 31a and the second top 31b, so that the section between the first top 31a and the second top 31b of the outer spring 24 during traveling. Contact the ground surface. That is, the contact area of the wheel 1 can be increased by the section between the first top portion 31a and the second top portion 31b of the outer spring 24. By securing a wide ground contact area, the wheel 1 is less likely to be buried in the road surface, and deterioration of running performance is suppressed.

In this embodiment, both ends of the outer spring 24 are not fixed to the wheel portions 10 (

rim members

11a and 11b). That is, in the present embodiment, both ends of the outer spring 24 are non-fixed. However, the outer spring 24 may have one end or both ends fixed to the wheel portion 10.

As shown in FIG. 7, the contact patch spring 25 is connected to two outer springs 24 adjacent to each other in the circumferential direction of the wheel 1. The ground plane spring 25 is connected to the outer spring 24 so as to regulate the relative displacement between the outer springs 24. The ground plane spring 25 is connected to a portion of the outer spring 24 that is not connected to the main body spring. That is, in the present embodiment, the ground contact surface spring 25 functions as a regulating member that regulates the relative displacement of the outer springs 24 adjacent to each other in the circumferential direction of the wheel 1 at a portion not connected to the main body spring 21. Specifically, the ground plane spring 25 is arranged between two outer springs 24 adjacent to each other in the circumferential direction of the wheel 1, is combined with these two outer springs 24, and is connected to the outer spring 24.

In the present embodiment, the ground plane spring 25 is connected to the outer spring 24 in the section between the first top portion 31a and the second top portion 31b of the two outer springs 24. The mode of connecting the outer spring 24 and the ground plane spring 25 is the same as that described with reference to FIGS. 8A and 8B.

By connecting the contact patch spring 25 to the outer spring 24, the distance between the outer springs 24 does not become too wide even when a load is applied to the skeleton portion 2, and the function as the wheel 1 is maintained. It will be easier. In particular, the ground contact surface spring 25 can be regulated so that the distance between the outer springs 24 does not become too wide in the range where the outer spring 24 comes into contact with the ground surface during traveling, so that the load bearing performance by the wheel 1 can be improved. can. Further, in the present embodiment, the outer spring 24 located in the section between the first top portion 31a and the second top portion 31b and the ground contact surface spring 25 come into contact with the ground surface during traveling. Therefore, the ground contact area of the wheel 1 can be further increased. By securing a wider ground contact area in this way, the wheel 1 is less likely to be filled with the road surface, and deterioration of running performance is further suppressed.

As shown in FIG. 7, the auxiliary spring 26 is connected to two main body springs 21 adjacent to each other in the circumferential direction of the wheel 1. The auxiliary spring 26 is connected to the main body spring 21 so as to regulate the relative displacement between the main body springs 21. The auxiliary spring 26 is connected to a portion of the main body spring 21 that is not connected to the outer spring 24. For example, in the present embodiment, the auxiliary spring 26 is connected to a portion of the main body springs 21 adjacent to each other in the circumferential direction of the wheel 1 inside the width direction of the wheel 1 with respect to the first top portion 31a of the first main body spring 21a. It functions as a regulating member that regulates the relative displacement of the main body spring 21 adjacent to the wheel 1 in the circumferential direction. Specifically, the auxiliary spring 26 is arranged between two main body springs 21 adjacent to each other in the circumferential direction of the wheel 1, is combined with these two auxiliary springs 26, and is connected to the auxiliary spring 26.

In the present embodiment, the skeleton portion 2 includes two auxiliary springs 26, a first auxiliary spring 26a and a second auxiliary spring 26b. The first auxiliary spring 26a is connected to a portion inside the width direction of the wheel 1 with respect to the first top portion 31a of the first main body spring 21a. That is, the first auxiliary spring 26a is connected to the first main body spring 21a at a position where the first main body spring 21a is not connected to the outer spring 24. Specifically, the first auxiliary spring 26a is connected to a portion of the two first main body springs 21a inside the width direction of the wheel 1 with respect to the first top portion 31a. Further, the second auxiliary spring 26b is connected to a portion inside the width direction of the wheel 1 with respect to the second top portion 31b of the second main body spring 21b. That is, the second auxiliary spring 26b is connected to the second main body spring 21b at a position where the second main body spring 21b is not connected to the outer spring 24. Specifically, the second auxiliary spring 26b is connected to a portion of the two second main body springs 21b inside the width direction of the wheel 1 with respect to the second top portion 31b. The mode of connecting the main body spring 21 and the auxiliary spring 26 is the same as that described with reference to FIGS. 8A and 8B.

By connecting the auxiliary spring 26 to the main body spring 21, a portion of the main body spring 21 that is not connected to the outer spring 24 is connected. Therefore, the load bearing performance of the wheel 1 can be enhanced. That is, even when a load is applied to the skeleton portion 2, the distance between the main body springs 21 does not become too wide, and it becomes easy to maintain the function as the wheel 1.

In the present embodiment, the end portion of the auxiliary spring 26 on the side close to the flange member 12 is not fixed to the wheel portion 10 (flange member 12). That is, in this embodiment, the auxiliary spring 26 is not fixed. However, one end of the auxiliary spring 26 may be fixed to the wheel portion 10.

The lengths of the outer spring 24, the ground contact surface spring 25, and the auxiliary spring 26 may be appropriately determined according to the desired size and weight of the wheel 1, the required properties of the ground contact deformed portion, and the like.

The wheel 1 according to the present embodiment is configured by mounting a tread member forming the tread portion 3 on the outer periphery of the skeleton portion 2 described above. The tread member is attached to the skeleton portion 2 so as to extend over the entire width direction of the wheel 1, for example, as shown in FIG. The tread member is attached to at least the ground contact region of the skeleton portion 2 formed by the main body spring 21, the outer spring 24, and the ground contact surface spring 25. The tread member may be configured to include, for example, a non-woven fabric. The non-woven fabric may be made of metal, for example. By using the non-woven fabric made of metal, the desired wheel 1 can be used even in an environment where the temperature change is large. Here, it is assumed that the tread member is configured to include a non-woven fabric made of metal.

For example, the tread member is fitted into a groove formed on the radial outer surface of the wheel 1 in the skeleton portion 2 in a state where the main body spring 21, the outer spring 24, and the ground contact surface spring 25 are combined, whereby the skeleton portion 2 is fitted. Is attached to. Specifically, in the present embodiment, the main body spring 21 extends in the wheel portion 10 along the width direction of the wheel 1 (that is, at an angle of 0 ° with respect to the width direction of the wheel 1). It is attached. Therefore, the outer spring 24 woven into the main body spring 21 and the contact patch spring 25 woven into the outer spring 24 also extend along the width direction of the wheel 1 in the wheel portion 10. As described above, when the main body spring 21, the outer spring 24 and the ground contact surface spring 25 extend along the width direction of the wheel 1, the main body spring 21, the outer spring 24 and the contact are made as shown by the broken line in FIG. 7B. By the ground spring 25 (more specifically, in this embodiment, by the main body spring 21 and the outer spring 24, and by the outer spring 24 and the ground contact surface spring 25), the radial outer side of the wheel 1 in the skeleton portion 2. A groove 27 recessed from the surface of the surface is formed.

In the present embodiment, the tread member is mounted in the groove 27 formed by the main body spring 21, the outer spring 24, and the ground plane spring 25. At this time, the tread member 30 is mounted so that at least a part thereof is embedded in the groove 27, for example, as shown in FIG. By mounting the tread member 30 so that at least a part thereof is embedded in the groove 27, the tread member 30 is less likely to fall out of the groove 27. In the present embodiment, only a part of the tread member 30, that is, only the radial inner portion of the wheel 1 in the tread member 30, is mounted so as to be embedded in the groove 27, and the wheel 1 in the tread member 30 is mounted. The radial outer portion is exposed from the groove 27 to the radial outer side of the wheel 1. By being mounted in this way, vibration and the like during traveling can be suppressed. However, the tread member 30 may be mounted so that the entire tread member 30 is embedded in the groove 27. In this case, the tread member 30 is less likely to fall out of the groove 27. In the present embodiment, as shown in FIG. 1, the tread member 30 is embedded in all the grooves 27 formed on the surface of the skeleton portion 2. However, the tread member 30 does not have to be embedded in all the grooves 27. For example, the tread member 30 may be embedded in only a part of the grooves 27 formed in the skeleton portion 2. In this case, the weight of the wheel 1 can be reduced.

In the present embodiment, it is preferable that the tread member 30 is detachably attached to the skeleton portion 2. Since the tread member 30 is detachably attached to the skeleton portion 2, the tread member 30 can be removed from the skeleton portion 2 and replaced when the tread member 30 is worn or the like.

In the present embodiment, the tread member 30 is made of a non-woven fabric 32, for example, as schematically shown in FIG. The tread member 30 can be configured in the shape of a rod having a through hole 30a in the central portion in a cross-sectional view in the extending direction. The tread member 30 can form the nonwoven fabric 32 in the shape of an elongated rod having a substantially circular cross section. Here, the substantially circular shape includes not only a perfect circle but also a distorted circular shape (for example, an elliptical shape as schematically shown in FIG. 9) and a shape having irregularities on the outer peripheral portion of the cross section. To say. The through hole 30a provided in the tread member 30 is a hole for passing the core material 31. The core material 31 extends along the extending direction of the tread member 30. The core material 31 can be formed of, for example, a coil spring having a fine pitch and a fine wire diameter.

The tread member 30 is not limited to the example shown in FIG. For example, as shown in FIGS. 10A and 10B, the tread member 30 may include a reinforcing member 33 for reinforcing the through hole 30a in the through hole 30a. The reinforcing member 33 may be composed of, for example, a coil spring having a dense pitch. A core material 31 is arranged inside the cylindrical reinforcing member 33. By providing the reinforcing member 33, it is possible to prevent the core material 31 from biting into the nonwoven fabric 32 as compared with the case where the reinforcing member 33 is not provided. Further, the reinforcing member 33 protects the core material 31, so that the durability of the tread member 30 is improved. Further, the reinforcing member 33 can store and retain the heat transferred from the wheel portion 10 and the like and the heat generated by the tread member 30, and can prevent the tread member 30 from being overcooled in an extremely low temperature environment.

Further, the tread member 30 may have a gourd-shaped shape in a cross-sectional view, as shown in FIGS. 11A and 11B, for example. In this case, the tread member 30 has a fixed region A1 embedded in the groove 27 and a grounded region A2 to be grounded. A ground contact area A2 is provided on the radial outer side of the wheel 1 with respect to the fixed area A1. The tread member 30 is provided with a through hole 30a in the fixed region A1 and is provided with a reinforcing member 33 in the through hole 30a. A core material 31 is arranged inside the reinforcing member 33. In the cross section, the width of the ground contact area A2 is larger than the width of the fixed area A1.

In the present embodiment, it is preferable that the tread member 30 further includes a fixing member for fixing the tread member 30 to the skeleton portion 2. As a result, the tread member 30 is less likely to fall off from the skeleton portion 2. The fixing member may have an arbitrary configuration in which the tread member 30 can be fixed to the skeleton portion 2.

For example, when the tread member 30 is configured in a rod shape as shown in the example shown in FIG. 9, the tread member 30 may include a fixing member extending from both ends of the rod-shaped tread member 30 in the extending direction of the tread member 30. .. For example, the tread member 30 may include a fixing member extending in the extending direction of the core material 31. In this case, the core material 31 and the fixing member may be configured as an integral member. Specifically, the coil spring having the function of the core material 31 and the fixing member is inserted into the through hole 30a and fixed to the skeleton portion 2, whereby the tread member 30 is fixed to the skeleton portion 2. .. At least one coil spring may be used for one tread member 30, and a plurality of coil springs may be used. However, the mode of the fixing member is not limited to this. The fixing member may be configured as a separate member independent of the tread member 30, for example.

As described above, the wheel 1 according to the present embodiment includes at least the tread member 30 arranged on the outer periphery of the skeleton portion 2. Therefore, the wheel 1 according to the present embodiment prevents foreign matter such as sand from entering the inside side (that is, the rotation center side) of the wheel 1 by the tread member 30, even when traveling on a sandy ground or the like. Can be done. As a result, the running performance of the wheel 1 is less likely to deteriorate. In particular, in the wheel 1 according to the present embodiment, since the tread member 30 is continuously arranged on the outside of the first main body spring 21a and the second main body spring 21b adjacent in the width direction, the running performance is less likely to deteriorate. ..

Although it has been explained that the tread member 30 is composed of a non-woven fabric made of metal, the material of the tread member 30 is not limited to the non-woven fabric made of metal. For example, the entire tread member 30 may be made of silicon rubber or a metal porous body.

Further, for example, the tread member 30 may be made of rubber. For example, the tread member 30 may be made of natural rubber (NR) and synthetic rubber. Examples of the synthetic rubber include butadiene rubber (BR), styrene-butadiene rubber (SBR), isoprene rubber (IR), butyl rubber (IIR), halogenated butyl rubber, chloroprene rubber (CR), acrylonitrile-butadiene rubber (NBR), and the like. Ethylene-propylene-diene rubber (EPDM) and the like can be mentioned. The rubber may be used alone or in combination of two or more.

The wheel 1 according to this embodiment can be assembled, for example, as follows. That is, first, a plurality of first main body springs 21a are attached to the rim member 11a and the first member 12a as shown in FIG. Similarly, a plurality of second main body springs 21b are attached to the rim member 11b and the second member 12b. Next, the first auxiliary spring 26a of the first main body spring 21a is connected to the inside of the wheel 1 in the width direction with respect to the first top portion 31a. Further, the second auxiliary spring 26b of the second main body spring 21b is connected to the inside of the wheel 1 in the width direction with respect to the second top portion 31b. Then, the width of the wheel 1 is fixed by fixing the rim member 11a and the first member 12a with the fixing member 13. The width of the wheel 1 is fixed by fixing the rim member 11b and the second member 12b with the fixing member 13 in the same manner. Next, the first member 12a and the second member 12b are connected by bolts to form the flange member 12. After that, the outer spring 24 is connected to the first main body spring 21a and the second main body spring 21b. Further, the ground plane spring 25 is connected between the first top portion 31a and the second top portion 31b of the outer spring 24. Then, the

spoke members

14a and 14b are attached. Finally, the tread member 30 is attached, and the assembly of the wheel 1 is completed.

As described above, the wheel 1 according to the present embodiment includes a plurality of main body springs 21 connecting the two

rim members

11a and 11b and the flange member 12 adjacent to each other in the circumferential direction of the wheel 1, and the wheel. A plurality of outer springs 24 connected to the main body spring 21 so as to regulate the relative displacement between the plurality of main body springs 21 in the circumferential direction of 1 are provided. With this configuration, the wheel 1 can be supported by a plurality of main body springs 21 arranged side by side in the width direction of the wheel 1, so that the first top portion 31a and the second portion 31a of the outer spring 24 can be supported while supporting a large load. The ground contact area of the wheel 1 can be increased in the section between the top portion 31b and the top portion 31b. By ensuring a large ground contact area in this way, it becomes difficult for the wheel 1 to be buried in the road surface, and deterioration of running performance can be suppressed. That is, according to the wheel 1, it is possible to secure a wide ground contact area while supporting a large load.

In the above embodiment, it has been described that the outer spring 24 is connected to a portion of the first main body spring 21a and the second main body spring 21b on the outer side in the width direction of the wheel 1. However, the outer spring 24 may be configured to connect at least the first top portion 31a of the first main body spring 21a and the second top portion 31b of the second main body spring 21b. By configuring the outer spring 24 to connect the first top portion 31a and the second top portion 31b, it is possible to secure a wide ground contact area in the wheel 1.

In the above embodiment, the case where the wheel 1 includes two main body springs 21 arranged in the width direction of the wheel 1, the first main body spring 21a and the second main body spring 21b, has been described. However, the number of main body springs 21 included in the wheel 1 is not limited to two. The wheel 1 may include three or more main body springs 21.

FIG. 12 is a schematic diagram schematically showing the configuration of the ground contact deformed portion of the skeleton portion 2 of the wheel 1 provided with the three main body springs 21. Specifically, the skeleton portion 2 shown in FIG. 12 includes a first main body spring 21a, a second main body spring 21b, and a third main body spring 21c. In FIG. 12, as in FIG. 7, the springs are simplified and shown by solid lines, respectively.

In this case, the skeleton portion 2 includes two

rim members

11a and 11b and two

flange members

28a and 28b. The two

flange members

28a and 28b are arranged so that the rotation axes are the same as those of the two

rim members

11a and 11b, and are arranged between the two

rim members

11a and 11b. The main body spring 21 is attached to the two

rim members

11a and 11b and the two

flange members

28a and 28b which are adjacent to each other in the width direction of the wheel 1 so as to be adjacent to each other in the width direction of the wheel 1. It is configured to connect the members together. Specifically, in the example shown in FIG. 12, the first main body spring 21a is configured to connect the rim member 11a and the flange member 28a by being attached to the rim member 11a, and the second main body spring 21b is a flange member. The third main body spring 21c is configured to connect the flange member 28b and the rim member 11b by being attached to the flange member 28a and the flange member 28b. ..

The outer spring 24 is connected to a portion of the main body spring 21 mounted on the

rim members

11a and 11b on the outer side in the width direction of the wheel 1. In the wheel 1 provided with the three main body springs 21, the main body springs 21 mounted on the

rim members

11a and 11b refer to the first main body spring 21a and the third main body spring 21c. For example, the outer spring 24 is connected to a portion outside the width direction of the first top portion 31a of the first main body spring 21a on one end side, and is wider than the third top portion 31c of the third main body spring 21c on the other end side. It is connected to the part outside the direction. The third top portion 31c is a portion of the third main body spring 21c that protrudes most radially outward. The outer spring 24 is further connected to the second body spring 21b at the second top 31b of the second body spring 21b. In this way, the outer spring 24 is connected to the three main body springs 21.

As shown in FIG. 12, the wheel 1 provided with the three main body springs 21 includes two contact patch springs 25, a first contact patch spring 25a and a second contact patch spring 25b. The first contact patch spring 25a and the second contact patch spring 25b are each connected to two outer springs 24 adjacent to each other in the circumferential direction of the wheel 1. Specifically, the first contact patch spring 25a is connected to the outer spring 24 in the section between the first top portion 31a and the second top portion 31b of the two outer springs 24. The second contact patch spring 25b is connected to the outer spring 24 in the section between the second top portion 31b and the third top portion 31c of the two outer springs 24 adjacent to each other in the circumferential direction of the wheel 1.

As shown in FIG. 12, the wheel 1 provided with the three main body springs 21 includes four auxiliary springs 26, that is, a first auxiliary spring 26a, a second auxiliary spring 26b, a third auxiliary spring 26c, and a fourth auxiliary spring 26d. The first auxiliary spring 26a is connected to a portion inside the width direction of the wheel 1 with respect to the first top portion 31a of the first main body spring 21a. The second auxiliary spring 26b and the third auxiliary spring 26c are connected to both outer sides of the wheel 1 in the width direction with respect to the second top portion 31b of the second main body spring 21b, respectively. The fourth auxiliary spring 26d is connected to a portion inside the width direction of the wheel 1 with respect to the third top portion 31c of the third main body spring 21c.

In this way, even when the wheels 1 are provided with the three main body springs 21 arranged side by side in the width direction thereof, the ground contact area of the wheels 1 can be widened by the outer spring 24, and the deterioration of the running performance is suppressed. be able to. Further, when the wheel 1 includes three main body springs 21, the load bearing capacity is improved by the amount of the increase in the main body springs 21 as compared with the case where the wheels 1 include two main body springs 21.

The wheel 1 according to the present disclosure may include four or more main body springs 21 arranged side by side in the width direction. Also in this case, the skeleton portion 2 can be configured by increasing the number of the flange member, the contact patch spring 25, and the auxiliary spring 26 according to the structure shown in FIG. As the number of main body springs 21 is increased, the load bearing capacity of the wheel 1 is improved.

For example, when the wheel 1 includes three or more main body springs 21 arranged side by side in the width direction, at least two or more main body springs 21 adjacent to each other in the width direction may be connected by one outer spring 24. good. At this time, the outer spring 24 may be configured to connect at least the tops of the two main body springs 21 arranged side by side in the width direction of the wheel 1. By connecting two or more main body springs 21 adjacent to each other in the width direction with one outer spring 24, the ground contact area of the wheel 1 can be increased, so that deterioration of running performance can be suppressed.

The skeleton portion 2 of the wheel 1 does not necessarily have to include the contact patch spring 25 or the auxiliary spring 26. However, since the skeleton portion 2 is provided with at least one of the contact patch spring 25 and the auxiliary spring 26, the distance between the outer spring 24 or the main body spring 21 does not become too wide, and it becomes easy to maintain the function as the wheel 1. ,preferable.

Further, the skeleton portion 2 of the wheel 1 may be provided with a regulating member that limits the relative displacement between the main body springs 21 and the outer springs 24 instead of the ground contact surface spring 25 or the auxiliary spring 26. The regulating member may regulate the relative displacement between the plurality of main body springs 21 at a portion not connected to the outer spring 24. The regulating member may regulate the relative displacement between the plurality of outer springs 24 at a portion not connected to the main body spring 21.

For example, the skeleton portion 2 of the wheel 1 has a regulating member 220 having two through holes 220a as shown in FIG. 13, and the regulating member 220 allows the two adjacent main body springs 21 to be connected to each other or to each other. The relative displacement between the outer springs 24 may be limited. The two through holes 220a of the regulating member 220 are large enough to allow the main body spring 21 or the outer spring 24 to pass through. In this case, one main body spring 21 or the outer spring 24 is passed through one of the two through holes 220a of the regulating member 220, and the other is one main body spring adjacent to the one main body spring 21. 21 or one outer spring 24 adjacent to the one outer spring 24 is passed through. For example, as shown in FIG. 14, the relative displacement of the two adjacent main body springs 21 can be limited by passing the regulating member 220 through a plurality of places of the main body spring 21. The same applies to the outer spring 24. In FIG. 14, a part of the regulating member 220 that limits the relative displacement of the two main body springs 21 is shown as a cross section so that the state of penetration of the main body spring 21 through the through hole 220a can be seen. As described above, the wheel 1 can also be configured by using the restricting member 220 instead of the contact patch spring 25 or the auxiliary spring 26. However, as described in the above embodiment, when the restricting member 220 is configured by a spring, the wheel 1 can be manufactured more easily, which is preferable.

Although this disclosure has been described based on various drawings and examples, it should be noted that those skilled in the art can easily make various modifications and corrections based on this disclosure. Therefore, it should be noted that these modifications and modifications are included in the scope of the present invention. For example, the functions and the like included in each component can be rearranged so as not to be logically inconsistent, and a plurality of components can be combined or divided into one.

1: Wheel, 10: Wheel part, 11a, 11b: Rim member, 12, 28a, 28b: Flange member, 12a: 1st member, 12b: 2nd member, 13: Fixing member, 14a, 14b: Spoke member, 15 : Spoke, 16: Sub-spoke, 17a: 1st bolt hole, 17b: 2nd bolt hole, 18: Counterbore, 19: Surface, 2: Skeletal part, 20, 27: Groove, 21: Main body spring, 21a: No. 1 main body spring, 21b: 2nd main body spring, 21c: 3rd main body spring, 22: elastic deformation part, 220: regulatory member, 220a: through hole, 23: locking part, 23a: straight part, 23b: bent part, 24: Outer spring, 25: Ground plane spring, 25a: 1st ground plane spring, 25b: 2nd ground plane spring, 26: Auxiliary spring, 26a: 1st auxiliary spring, 26b: 2nd auxiliary spring, 26c: 3rd Auxiliary spring, 26d: 4th auxiliary spring, 3: Tread part, 30: Tread member, 30a: Through hole, 31: Core material, 31a: 1st top, 31b: 2nd top, 31c: 3rd top, 32: Non-woven fabric, 33: Reinforcing member, A: Main body spring shaft, A1: Fixed area, A2: Grounding area

Claims

It ’s a wheel,
Two annular rim members arranged on the same axis,
With one or more annular flange members arranged so that the two rim members and the rotation axis are the same and arranged between the two rim members.
Of the two rim members and the one or more flange members, the two rim members and the one or more flange members can be mounted by being mounted on the members adjacent to each other in the width direction of the wheel. By connecting the adjacent members of the wheel to each other, a plurality of main body springs arranged side by side in the width direction of the wheel, and
A plurality of outer springs of a plurality of main body springs arranged side by side in the width direction of the wheel, and a plurality of outer springs connected to the main body spring so as to connect the tops of the main body springs protruding outward in the radial direction of the wheel.
Wheels equipped with.
The wheel according to claim 1, wherein the outer spring regulates a relative displacement between two main body springs adjacent to each other in the circumferential direction of the plurality of main body springs.
Of the two main body springs adjacent to the wheel in the circumferential direction, the relative displacement between the two main body springs not connected to the outer spring, or the two outer springs adjacent to the wheel in the circumferential direction. The wheel according to claim 1 or 2, further comprising a regulating member that regulates relative displacement between each other at a location not connected to the main body spring.
The wheel according to claim 3, wherein the restricting member is composed of a spring.