Attachment for different diameter wheel

Abstract

To provide an attachment for different diameter wheels with which a road surface cutting machine can be moved without significant vibrations being caused to the machine.SOLUTION: An attachment 20 for different diameter wheels is to be attached to different diameter wheels 10 of a road surface cutting machine 1 used when making rumble strips, and the attachment 20 includes a cylindrical attachment body 21 and an internally contacting body 32 that is fixed while internally contacting the attachment body 21 and has a cavity OQ that fits into the dimension and shape of the different diameter wheel 10, the internally contacting body 32 is fitted onto the outside of the different diameter wheel 10, and the attachment body 21 is formed so as to be connectable to a screw rod (axle end) 12 of the different diameter wheel 10.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to an attachment for wheels of different diameters.

Background Art

[0002] Conventionally, as a traffic safety facility, rumble strips (corrugated unevenness) may be constructed on the road surface at the center or the shoulder of a road. The road surface cutting machine used for this construction is provided with, for example, a non-uniform diameter wheel in a pentagonal shape at the lower part of one side surface. By rotating this non-uniform diameter wheel, the road surface cutting machine is moved up and down to construct rumble strips on the same road surface.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the conventional configuration, when moving the same road surface cutting machine to the next construction section after finishing the construction of rumble strips, there is a problem that when the non-uniform diameter wheel hits the road surface, large vibrations occur in the vehicle body of the road surface cutting machine. Therefore, an object of the present invention is to provide an attachment for non-uniform diameter wheels that eliminates the above-described problems and enables the road surface cutting machine to be moved without causing large vibrations in the road surface cutting machine.

Means for Solving the Problems

[0005] The present invention is an attachment for a non-uniform diameter wheel attached to a non-uniform diameter wheel of a road surface cutting machine used when constructing rumble strips, comprising a cylindrical attachment body and an inner body fixed to be inscribed in the attachment body and having a cavity adapted to the dimensional shape of the non-uniform diameter wheel. The inner body is externally fitted to the non-uniform diameter wheel, and the attachment body is formed to be connectable to the axle end of the non-uniform diameter wheel.

Effect of the Invention

[0006] According to the present invention, an inner body conforming to the dimensional shape of the non-uniform diameter wheel is fitted to the non-uniform diameter wheel, and the attachment body is installed on the road surface. Therefore, the road surface cutting machine can be moved without causing large vibrations in the road surface cutting machine due to the non-uniform diameter wheels.

Brief Description of the Drawings

[0007]

Figure 1

Figure 2

Figure 3

Figure 4

Embodiments for Carrying Out the Invention

[0008] Hereinafter, embodiments of the present invention will be described with reference to the drawings. [Road Surface Cutting Machine] FIG. 1 is a side view of a road surface cutting machine 1. The road surface cutting machine 1 is configured as a four-wheel self-propelled vehicle equipped with a vehicle body 2 and an engine (not shown) as a drive source. The four wheels are composed of two front wheels and two rear wheels. The two front wheels and the rear wheels (not shown) hidden behind the plane of FIG. 1 are circular tires, and hereinafter, in this specification, these are simply referred to as wheels 6. One of the remaining rear wheels is a substantially pentagonal stepped wheel 10 according to the present embodiment. The road surface cutting machine 1 is provided with a driver's seat 3, and a steering wheel 4 is provided in front of the driver's seat 3. A cutting unit 5 is provided below the driver's seat 3. The cutting unit 5 is a rotary blade formed on a drive rotor (not shown) and cuts the road surface.

[0009] The stepped wheel 10 is connected to a wheel support member 7, and the upper part of the wheel support member 7 is connected to the rod end of a hydraulic cylinder 8. The stepped wheel 10 is connected to the lower part of the wheel support member 7. The stepped wheel 10 is arranged adjacent to the cutting unit 5.

[0010] The stepped wheel 10 is substantially pentagonal in side view and has five vertex portions 10A and five side portions 10B linearly connecting the five vertex portions 10A. The stepped wheel 10 is supported by an axle 11. The height of the stepped wheel 10 can be adjusted by extending and retracting the rod of the hydraulic cylinder 8. The shape of the stepped wheel 10 is not limited to a substantially pentagonal shape in side view and may be a polygonal shape.

[0011] When the road surface cutting machine 1 moves forward, the vertex portions 10A and the side portions 10B alternately contact the road surface, whereby the road surface cutting machine 1 moves up and down. When the vertex portion 10A of the stepped wheel 10 contacts the road surface, the cutting unit 5 that cuts the road surface moves away from the road surface, and when the side portion 10B contacts the road surface, the cutting unit 5 that cuts the road surface bites into the road surface, and these operations are repeated, and rumble strips (wave-shaped unevenness) are constructed on the road surface at the center or the shoulder of the road.

[0012] [Configuration of Attachment for Stepped Wheel] FIG. 2 is a side view showing a state in which an attachment 20 for a non-uniform diameter wheel is attached to the non-uniform diameter wheel 10 of the road surface cutting machine 1 shown in FIG. 1. FIG. 3 is an exploded perspective view of the non-uniform diameter wheel 10 and the attachment 20 for the non-uniform diameter wheel. FIG. 4 is a side cross-sectional view of the non-uniform diameter wheel 10. In FIG. 4, the contour of the non-uniform diameter wheel 10 is shown by a phantom line. When the road surface cutting machine 1 is outside the construction area, it runs with the attachment 20 for the non-uniform diameter wheel attached to the non-uniform diameter wheel 10. As shown in FIG. 3, the non-uniform diameter wheel 10 includes a threaded rod (fastening portion) 12 extending in the axial direction at the axle end of the axle 11. The threaded rod 12 is integrally formed with the plate 13, and the plate 13 is fixed to the side surface of the non-uniform diameter wheel 10 by bolts 14.

[0013] The attachment 20 for the non-uniform diameter wheel includes an attachment body 21. As shown in FIG. 4, the attachment body 21 includes a metal annular body 30 and a rubber member 33 adhered to the outer peripheral portion of the annular body 30. The outer diameter of the attachment body 21 is equal to the outer diameter of the above-described wheels 6 including the front wheel and one rear wheel. The annular body 30 is formed in a cylindrical shape with the non-uniform diameter wheel 10 side open, and an outer end plate 22 is welded to the side surface of the annular body 30 opposite to the non-uniform diameter wheel 10. A shaft hole 23 is formed at the center of the outer end plate 22. The threaded rod 12 is inserted into the shaft hole 23. The diameter of the shaft hole 23 is formed to be larger than the diameter of the threaded rod 12.

[0014] As shown in FIG. 4, an inscribed body 32 that forms a cavity OQ conforming to the outer shape of the non-uniform diameter wheel 10 is provided on the inner peripheral portion of the annular body 30. The cavity OQ of the inscribed body 32 is formed slightly wider than the outer shape of the non-uniform diameter wheel 10, and the non-uniform diameter wheel 10 is swingable within the cavity OQ. The inscribed body 32 is formed by five plate-like members 29 and a part (inner inscribed portion 31) of the inner peripheral portion of the annular body 30. When the non-uniform diameter wheel 10 is polygonal, plate-like members 29 corresponding to the number of sides are required. The inner inscribed portion 31 is the portion of the inner peripheral portion where the vertex portion 10A of the non-uniform diameter wheel 10 is located. The five plate-like members 29 are welded to the inner peripheral portion of the annular body 30 at equal intervals. The plate-like members 29 are provided over the entire height direction of the annular body 30.

[0015] When attaching the attachment 20 for wheels with different diameters to the wheel 10 with different diameters, as shown in FIG. 3, a first washer 25A is fitted onto the threaded rod 12 on the side of the wheel 10 with different diameters, the attachment 20 for wheels with different diameters is fitted onto the wheel 10 with different diameters, a second washer 25B is fitted onto the threaded rod 12 protruding from the outer end plate 22, and the female threaded portion 27 of the fixing member 26 is screwed onto the threaded rod 12 to attach the attachment 20 for wheels with different diameters to the wheel 10 with different diameters. The fixing member 26 includes a pair of rod portions 28. The rod portions 28 are formed long, and if the rod portions 28 are distorted with a tool (not shown) inserted into the through hole 24, the fixing member 26 can be firmly fastened. Also, the fixing member 26 may be fastened by striking the rod portions 28 with a hammer or the like. Since six through holes 24 are formed in the outer end plate 22, the attachment 20 for wheels with different diameters can be lightened.

[0016] [Function of Attachment for Wheels with Different Diameters] As shown in FIG. 2, when the road surface cutting machine 1 with the attachment 20 for wheels with different diameters attached travels on its own, since the outer diameter of the attachment body 21 is formed equal to the outer diameter of the above-described wheel 6, there is less vibration and smooth self-propulsion is ensured. In this case, a load from the road surface cutting machine 1 is applied to the attachment body 21 via the wheel 10 with different diameters.

[0017] When the side portion 10B of the wheel 10 with different diameters moves directly below during the self-propulsion of the road surface cutting machine 1, as shown in FIG. 3, the side portion 10B rests on the plate-like member 29 directly below, and the load from the wheel 10 with different diameters is dispersed and applied to three points, namely the plate-like member 29 and the inner contact portions 31 on both sides of the plate-like member 29, and the load from the road surface cutting machine 1 is absorbed. When the apex portion 10A moves directly below, although not shown in the figure, the load from the wheel 10 with different diameters is dispersed and applied to three points, namely the inner contact portion 31 and the two plate-like members 29 adjacent to the inner contact portion 31, and the load from the road surface cutting machine 1 is absorbed.

[0018] At this time, since the cavity OQ of the insert 32 is formed slightly wider with a margin for the shape of the different-diameter wheel 10, the attachment body 21 swings vertically and horizontally with respect to the different-diameter wheel 10. Therefore, at least the upper part of the different-diameter wheel 10 does not contact the insert 32. According to this configuration, it is possible to suppress an excessive load from being applied to the attachment body 21, suppress the vibration applied to the vehicle body 2, and enable the road surface cutting machine 1 to run by itself.

[0019] Since the diameter of the axle hole 23 of the attachment body 21 is formed to be larger than the diameter of the threaded rod 12 on the side of the different-diameter wheel 10 by a predetermined dimension, and the cavity OQ of the insert 32 is formed slightly larger than the dimensional shape of the different-diameter wheel 10, the attachment body 21 can swing with respect to the different-diameter wheel 10 by the difference in these dimensions. Furthermore, since the clearance between the inner peripheral surface of the axle hole 23 and the outer peripheral surface of the threaded rod 12 is larger than the clearance between the inner peripheral surface of the insert 30 and the outer peripheral surface of the different-diameter wheel 10, the load on the threaded rod 12 and the axle 11 can be suppressed.

[0020] For this reason, the attachment body 21 rotates in accordance with the rotation of the different-diameter wheel 10. However, compared with the case where the different-diameter wheel attachment 20 is not attached, a large load applied to the different-diameter wheel 10 is less likely to be applied to the attachment body 21, and the load applied to the attachment body 21 can be reduced.

[0021] Furthermore, a rubber member 33 is attached to the annular body 30 of the attachment body 21 over the entire circumferential direction of the axle 11. Thereby, when the road surface cutting machine 1 runs by itself, the load received by the attachment body 21 from the road surface can be reduced, the vibration applied to the vehicle body 2 can be suppressed, and the road surface cutting machine 1 can be made to run by itself.

[0022] [Effects of the Different-Diameter Wheel Attachment] As described above, the attachment 20 for non-uniform diameter wheels in this embodiment is an attachment 20 that is attached to the non-uniform diameter wheel 10 of the road surface cutting machine 1 used when constructing rumble strips. It includes a cylindrical attachment body 21 and an inscribed body 32 that is inscribed and fixed to the attachment body 21 and has a cavity OQ adapted to the dimensional shape of the non-uniform diameter wheel 10. The inscribed body 32 is externally fitted to the non-uniform diameter wheel 10, and the attachment body 21 is formed so as to be connectable to the screw rod (fastening portion) 12 of the non-uniform diameter wheel 10. According to this configuration, the inscribed body 32 along the dimensional shape of the non-uniform diameter wheel 10 is fitted to the non-uniform diameter wheel 10, and the attachment body 21 is installed on the road surface. Therefore, the road surface cutting machine 1 can be moved without causing large vibrations to the road surface cutting machine 1 due to the non-uniform diameter wheel 10.

[0023] Further, the attachment body 21 is rotatably connected to the screw rod 12 of the non-uniform diameter wheel 10 integrally with the non-uniform diameter wheel 10. According to this configuration, since the attachment body 21 has an overlapping axle with the non-uniform diameter wheel 10 and can rotate integrally, the road surface cutting machine 1 can be moved without causing large vibrations to the road surface cutting machine 1.

[0024] Further, the attachment body 21 includes an outer end plate 22, and is rotatably connected to the screw rod 12 integrally with the non-uniform diameter wheel 10 via the outer end plate 22, the first washer 25A, and the second washer 25B. According to this configuration, it is easy to attach and detach the attachment body 21 from the non-uniform diameter wheel 10.

[0025] Further, the outer end plate 22 is formed with an axle hole 23 through which the screw rod 12 is inserted. The diameter of the axle hole 23 is formed to be larger than the diameter of the screw rod 12 by a predetermined dimension, and within the predetermined dimension, the attachment body 21 is supported so as to be swingable with respect to the screw rod 12. According to this configuration, since the attachment body 21 can swing by a predetermined dimension with respect to the screw rod 12, that is, the axle 11 of the non-uniform diameter wheel 10, the load applied to the attachment body 21 can be reduced.

[0026] Further, the inscribed body 32 has a plate-like member 29 corresponding to the number of side portions 10B of the non-uniform diameter wheel 10. According to this configuration, since the side portion 10B of the non-uniform diameter wheel 10 can be supported by the plate-like member 29, the stability of the road surface cutting machine 1 is improved.

[0027] Also, according to the present embodiment, the inscribed body 32 is formed by five plate-like members 29 and a part (inscribed portion 31) of the inner peripheral portion of the annular body 30. The inscribed portion 31 is a part of the inner peripheral portion of the annular body 30, and the inscribed body 32 is substantially composed of only five plate-like members 29, so that the weight of the attachment body 21 is reduced and the attachment and detachment of the attachment body 21 are facilitated. Also, even when compared with a conventional road surface cutting machine provided with four wheels 6, the road surface cutting machine 1 can be smoothly moved in the same manner.

Explanation of reference numerals

[0028] 1 Road surface cutting machine 2 Vehicle body 5 Cutting portion 6 Wheel 10 Non-uniform diameter wheel 10A Apex portion 10B Side portion 11 Axle 12 Screw rod (fastening portion) 20 Attachment for non-uniform diameter wheel 21 Attachment body 22 Outer end plate 23 Axle hole 24 Through hole 25A First washer (washer) 25B Second washer (washer) 26 Fixing member 29 Plate-like member 30 Annular body 31 Inscribed portion 32 Inscribed body 33 Rubber member OQ Cavity

Claims

1. An attachment for a different diameter wheel that is attached to a different diameter wheel of a road milling machine used when installing rumble strips, The attachment assembly includes a cylindrical attachment body, and an inscribed body that is inscribed in the attachment body and fixed to the attachment body and has a cavity that matches the dimensions and shape of the different diameter wheel. The inscribed body is fitted onto the different diameter wheel, The attachment body is formed so as to be connectable to an axle end of the different diameter wheel. Attachment for different diameter wheels.

2. The attachment body is connected to a fastening portion of an axle end of the different diameter wheel so as to be rotatable integrally with the different diameter wheel.

2. An attachment for wheels of different diameters according to claim 1.

3. The attachment body includes an outer end plate; The outer end plate is connected to the fastening portion of the axle end via a washer so as to be rotatable integrally with the different diameter wheel.

2. An attachment for wheels of different diameters according to claim 1.

4. The outer end plate has an axle hole through which the axle end is inserted, The diameter of the axle hole is formed to be larger than the diameter of the fastening portion of the axle end by a predetermined dimension, The attachment body is supported to be swingable relative to the axle end within the predetermined dimension.

4. An attachment for wheels of different diameters according to claim 3.

5. The inscribed body has a plate-shaped member corresponding to the number of sides of the different diameter wheel.

2. An attachment for wheels of different diameters according to claim 1.

Images