JPH0352561Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a rough road running device for a vehicle having tires mounted on a drive shaft.

[Prior Art] On rough roads such as muddy terrain, it is extremely difficult to drive with conventional tires due to slips and the like. Once the tires are stuck in the mud, it is almost impossible to get out of the mud. In order to escape, it was necessary to remove the cargo and place a board under the tires, or to have another vehicle pull it.

On the other hand, in Japanese Patent Application Laid-Open No. 51-112032, a remote control method for a tire inner wall is disclosed, which changes the tire inner wall according to the road surface condition to change the tire contact area and provide a suitable running condition according to the road surface condition. However, since it uses ordinary tires, its grip on the road surface is not necessarily sufficient, and its structure is complicated and expensive.

As for other conventional technology, Japanese Patent Publication No. 1989-8962 discloses a device with a non-slip lever that can change the holding position when in use and when not in use.
Publication No. 55-94209 shows a spike rod that protrudes from the road surface.

However, in the device disclosed in Japanese Patent Publication No. 48-8962, since the anti-skid lever is only attached to the tire by a locking piece, there is a problem that it may come off the tire while driving on a rough road, making it impossible to grasp the road surface. . Furthermore, since the member that rotates the anti-skid bar is located on the outer surface of the wheel, there is a very high possibility that it will be damaged. In addition, anti-slip rails alone cannot provide the road surface gripping force (frictional force) necessary for escaping from, for example, mud.

On the other hand, the spike rod shown in Japanese Utility Model Application Publication No. 55-94209 cannot be moved, so there is a problem in that it becomes a source of noise and dust when driving on roads other than rough roads.

[Purpose of the invention] The present invention has been proposed in view of the problems of the prior art described above, and its purpose is to provide a device that can easily travel on rough roads such as muddy areas or escape from muddy areas.

[Means for Solving the Problems] The rough road traveling device of the present invention has extensions protruding outward in the radial direction formed at multiple locations on the side surface of the outer peripheral edge of the outer wheel of the double tire mounted on the drive shaft. A hinge is provided in a portion extending in the drive shaft direction of the double tire near the boundary between the extension portion and the wheel, and an L-shaped arm is pivotally supported on the hinge, When the arm is rotated toward the extension part, the long side thereof is formed so as to be in contact with the extension part, and the arm is formed with a long hole into which a bolt for fixing the arm to the extension part is inserted, The long side end of the arm is fixed to a cylinder, and the cylinder houses a spike rod that is biased by a spring, and the cylinder and the internal spring have enough space to allow the spike rod to penetrate into the road surface. A shaft portion and a bolt portion for fixing a plurality of spike rods to the wheel are formed on the opposite side of the wheel from the extension portion, and a rubber, washer, and nut are provided. It is being

[Function] According to the present invention having the configuration described above, when driving on a rough road, the arm is rotated and fixed to the side surface of the peripheral edge of the wheel, and the spike rod is projected onto the road surface.
The spike rod allows you to accurately grasp the road surface and drive on rough roads. When driving on a good road, the arm is rotated toward the wheel hub to fix the spike rod to the wheel hub, thereby preventing noise pollution and dust pollution caused by the spike rod.

Here, when the arm is rotated and fixed to the side surface of the peripheral edge of the wheel, it is fastened with bolts and nuts, so it will not easily come off. In addition, since the hinge for rotating the arm is formed near the boundary between the wheel extension and the wheel and in a portion extending in the drive shaft direction of the double tire, compared to when it is provided on the outer side of the wheel. The possibility of damage is extremely small.

Furthermore, this device consists of an arm and a spike rod, and is simpler in structure and cheaper than conventional devices.

[Preferred Embodiment] When carrying out the present invention, it is preferable that 8 to 16 extensions projecting outward in the radial direction are formed on the side surface of the peripheral edge of the wheel, and each of these extensions is provided with a spike rod. . In this way, the arm can be properly fixed to the wheel.

When carrying out the present invention, it is preferable to fix the spike rod to the wheel hub by interposing a rubber between the spike rod and the wheel hub and tightening the spike rod from the outside with a nut via a washer. In this way, the spike rod can be properly fixed and cracking noise can be prevented.

[Examples] Examples of the present invention will be described below with reference to the drawings.

1 and 2, there are preferably 8 to 16 locations (8 locations in the illustrated example) on the side surface of the outer peripheral edge of the outer wheel 1 of the double tire T mounted on the drive shaft A. An extension part 1a is formed that projects toward the outer edge of the peripheral part.
A hinge 2 is provided on the inner periphery of the corner where the . An arm 3 is pivotally supported on this hinge 2, and the arm 3 is formed in an L shape, and its long side 3a is an extension part 1a of the arm 3 as shown by a solid line.
The arm 3 is formed so as to come into contact with the extension 1a when rotated to the side, and at that time, the arm 3 can be fixed to the extension 1a with a nut 4 screwed into a bolt 3c fitted in a long hole 3b. There is. A cylinder 5 is fixed in the longitudinal direction at the end of the long side 3a of the arm 3, and the cylinder 5 has a spike rod 7 urged to protrude by a spring 6 as shown in FIG. It is stored. When the arm 3 is fixed to the extension part 1a, the spike rod 7 is formed to penetrate the road surface by a depth S (for example, 60 mm), and the cylinder 5 is provided with a length S in the contraction direction. It is being

On the other hand, a shaft part 9 and a bolt part 10 are formed at the end of the wheel hub 8, as shown in FIG. 4, and all the arms 3 are rotated toward the wheel hub 8 as shown by chain lines. At times, the eight spike rods 7 are combined into rubber 11 and washers 12.
It can be fixed to the wheel hub 8 with a nut 13 via.

Next, the effect will be explained.

When driving on a rough road, the arm 3 is rotated in advance toward the peripheral edge of the wheel 1 as shown by a solid line and fixed to the extension part 1a with a nut 4, so that the spike rod 7 is projected onto the road surface. Therefore, the spike rod 7 penetrates into the road surface by a depth S, and its ability to grip the road surface allows the vehicle to travel safely on rough roads without slipping. Then, after driving on the rough road, Natsu 4
is removed, the arm 3 is rotated toward the wheel hub 8 as shown by the chain line, and the eight spike rods 7 are collectively fixed to the wheel hub 8 with a nut 13 via a rubber 11 and a washer 12. At this time, the rubber 11 properly fixes the spike rod 7 to prevent chattering noise. Further, the spring 6 absorbs the interference between the good road surface and the spike rod 7 when changing from a rough road to a good road, and prevents the generation of dust.

[Effects of the invention] As explained above, according to the invention, the end of the arm, which is pivotally supported on a part of the peripheral edge of the wheel and can be fixed to the side surface of the peripheral edge, is biased by a spring when in use, and is attached to the road surface. A spike rod that protrudes from the wheel hub and can be fixed to the wheel hub when not in use is provided, so when driving on rough roads, the arm can be rotated and fixed to the side of the wheel periphery, allowing the spike rod to protrude from the road surface and grip the road surface in a suitable manner. You can drive on rough roads. When driving on a good road, the arm is rotated toward the wheel hub to secure the spike rod to the wheel hub. Furthermore, this device consists of an arm and a spike rod, and is simpler in structure and cheaper than conventional devices.

[Brief explanation of the drawing]

FIG. 1 is a front sectional view showing an embodiment of the present invention;
2 is a side view of FIG. 1, FIG. 3 is a sectional side view showing details of the spike rod, and FIG. 4 is a sectional view showing details around the end of the wheel hub. DESCRIPTION OF SYMBOLS 1...wheel, 1a...extension of wheel periphery, 3...arm, 6...spring, 7...
Spike rod, 8...Wheel hub.

Claims (1)

[Scope of utility model registration request] Extensions protruding outward in the radial direction are formed at multiple locations on the side surface of the peripheral edge of the outer wheel of the double tire mounted on the drive shaft, and the drive shaft of the double tire is formed near the boundary between the extension and the wheel. A hinge is provided on the part extending in the axial direction, and an L-shaped arm is pivotally supported on the hinge, and when the arm is rotated toward the extension part, its long side is connected to the extension part. The arm is formed with a long hole into which a bolt for fixing it to the extension part is inserted, and the long side end of the arm is fixed to a cylinder, and a bolt is fixed to the cylinder. A spike rod is housed therein which is biased by a spring, and the cylinder and the internal spring are provided with a margin sufficient to allow the spike rod to penetrate into the road surface. A rough road traveling device comprising a shaft portion and a bolt portion for fixing a spike rod to the wheel, and is provided with a rubber, a washer, and a nut.