JPH10244805A - Device for preventing tire wheel from slipping-off - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device for surely preventing a tire wheel from slipping- off even if the tire wheel is not fixed to a tire wheel mounting drum. SOLUTION: An inner cylinder 3 fitted on a hub 2 projected from a drum 1 on which a wheel is mounted has an outer diameter which is larger than an inner diameter of a tire wheel and support holes 4 at positions corresponding to recessed parts 5 on the outer peripheral surface of the hub 2 and a stopper block 6 engaged with the recessed part 5 is removably supported by each support hole 4. The stopper block 6 projects its top surface from the outer peripheral surface of the inner cylinder 3 when it is engaged with the recessed part 5 and the inner diameter of an outer cylinder 7 fitted on the inner cylinder 3 equals the outer diameter formed by the stopper blocks 6 and the outer cylinder 7 has slipping-off preventing members 20 which engage with the stopper blocks 6 to prevent itself from slipping-off when it is fitted on the inner cylinder 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a derailing prevention device for preventing a wheel from being derailed due to breakage of a hub bolt in a large vehicle such as a large truck.

[0002]

2. Description of the Related Art Conventionally, wheels of large vehicles such as large trucks are fitted with tire wheels on hubs of wheel mounting drums provided on axles, and tire wheels are screwed with nuts on hub bolts mounted on wheel mounting drums. It is fixed to the wheel mounting drum.

[0003]

However, when the hub bolt is broken due to metal fatigue during running of the vehicle, the tire wheel may come off the drum together with the tire, and the wheel may run away on the road, resulting in the worst case. In this case, the steering wheel was erroneously operated to avoid collision with another vehicle or to avoid this wheel, which was a major cause of the occurrence of a serious accident.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and to provide an anti-wheel removal device that reliably prevents the wheels from being released even when the fixing of the tire wheels to the wheel mounting drum is not guaranteed due to breakage of a hub bolt or the like. The subject.

[0005]

In order to solve the above-mentioned problems, a derailing prevention device according to the present invention is mounted on a hub protruding from a wheel mounting drum and has the following requirements. . (A) The inner cylinder fitted to the hub has an outer diameter larger than the inner diameter of the tire wheel, and a support hole is formed in the peripheral wall at a position corresponding to the recess on the outer peripheral surface of the hub. A stopper block that engages with the concave portion is detachably supported in the hole. (B) The stopper block is engaged with the concave portion so that the upper surface of the stopper block projects from the outer peripheral surface of the inner cylinder. (C) The outer cylinder fitted into the inner cylinder is formed so that the inner diameter is equal to the outer diameter formed by the stopper block. A stopper is formed to engage with the stopper block when fitted to the inner cylinder so that it does not come off from the inner cylinder.

[0006]

FIG. 1 shows a derailment prevention device. The device for preventing wheel removal is fitted on a hub 2 protruding from a wheel mounting drum 1, and an inner cylinder 3 fitted on the hub 2;
A stopper block 6 fitted in a support hole 4 formed in the inner cylinder 3 and engaged with a recess 5 formed on the outer peripheral surface of the hub 2.
And an outer cylinder 7 that covers the inner cylinder 3.

The inner cylinder 3 is a cylindrical member made of metal such as iron, and has an inner diameter formed so as to fit into the hub 2. When the inner cylinder 3 is fitted to the hub 2, it corresponds to the recess 5 of the hub 2. The same number of rectangular support holes 4 as the number of the concave portions 5 are formed at the positions corresponding to the rectangular holes. Engagement recesses 8 are formed in the inner walls of the short sides of the support holes 4 respectively.

The stopper block 6 is a block made of metal such as iron, the lower surface of which is formed in a curved surface so as to engage with the concave portion 5 of the hub 2, and the thickness of the inner cylinder when the upper surface is supported by the support hole 4. 3 is formed to protrude outward from the peripheral surface.

A metal ball 9 is buried at both end surfaces in the longitudinal direction of the stopper block 6, and the metal ball 9 is urged by a spring (not shown) so as to always protrude outward. When the metal block 9 supports the stopper block 6 in the support hole 4 of the inner cylinder 3, the metal ball 9 is urged by a spring into an engagement recess 8 formed in the inner wall of the support hole 4 and engaged therewith. It is formed so that it does not fall off. A depression 10 is formed in the center of the upper surface, and receives the tip of a bolt 11 provided in an outer cylinder 7 described later, and receives the inner cylinder 3 and the stopper block 6.
And the outer cylinder 7 can be integrated.

The outer cylinder 7 is a cylindrical member made of metal such as iron which covers the inner cylinder 3 and has an outer diameter larger than an inner diameter of a tire wheel 17 fixed to a hub bolt 15 with a nut 16 (see FIG. 2). Slope 1 at predetermined intervals on inner wall
8 are formed to protrude. The inner diameter formed by the tip of the slope 18 is formed to be equal to the outer diameter formed by the stopper block 6.

A stopper 20 is formed on one side of the outer cylinder 7 so as to engage with the stopper block 6 when the outer cylinder 7 is put on the inner cylinder 3 so that the outer cylinder 7 does not come off. The retainer 20 is formed of a flange formed to protrude toward the center at the rear opening at a position corresponding to the slope 18. The inner diameter of the stopper 20 is larger than the outer diameter of the inner cylinder 3 and smaller than the outer diameter of the stopper block 6.

Further, a locking edge 21 is provided around the inner wall surface of the front opening of the outer cylinder 7. The inner diameter of the locking edge 21 is larger than the outer diameter of the inner cylinder 3 and the stopper block 6 is formed. It is formed smaller than the outer diameter. In addition, retaining 2
The distance between the zero and the locking edge 21 is substantially equal to the length of the stopper block 6, and is formed so as to sandwich the stopper block 6 between the stopper 20 and the locking edge 21.

A screw hole 22 is formed in the center of the slope 18 from the outer peripheral surface of the outer cylinder 7 toward the center, and a bolt 11 having a lock nut 23 is screwed into the screw hole 22. The tip of the bolt 11 is formed so as to penetrate the outer cylinder 7 and engage with the recess 10 of the stopper block 6 supported by the inner cylinder 3.

When the derailing prevention device having the above configuration is used, the tire wheel 17 is connected to the hub bolt 15 by the nut 16.
In a state where the wheels are securely mounted on the wheel mounting drum 1, the inner cylinder 3 is fitted to the hub 2 and the fitted inner cylinder 3
To make the support hole 4 correspond to the concave portion 5 of the hub 2.

Next, the stopper block 6 is fitted into the support hole 4 of the inner cylinder 3. Once the stopper block 6 is fitted, the metal ball 9 is urged by the spring and does not engage with the engaging concave portion 8 in the support hole 4 and does not fall off. The stopper blocks 6 may be fitted in every other ten support holes 4. 5
After fitting the two stopper blocks 6, the outer cylinder 7 is fitted so as to cover the inner cylinder 3. At this time, the outer cylinder 7 is rotated so that the stopper 20 does not come into contact with the stopper block 6 so that the stopper 20 passes between the stopper block 6 and the stopper block 6.
The slope 18 rides on the upper surface of the stopper block 6 with the locking edge 21 abutting on the stopper block 6 until the play between the outer cylinder 7 and the stopper block 6 disappears. Move.

When the slope 18 rides on the stopper block 6, the stopper 20 is located on the back side of the stopper block 6, and the stopper block 6 is sandwiched between the locking edge 21 and the stopper 20. In this state, the bolt 11 is screwed into the outer cylinder 7 and further engaged with the recess 10 of the stopper block 6. When the tip of the bolt 11 reaches the recess 5, the inner nut 3, the stopper block 6, and the outer cylinder 7 are integrated with the hub 2 by tightening the lock nut 23 so that the bolt 11 is not loosened. It can be fixed securely (see FIG. 3).

As described above, the inner cylinder 3 is fitted into the hub 2, the stopper block 6 is fitted into the support hole 4 of the inner cylinder 3, the outer cylinder 7 is covered therefrom, and the bolt 11 is connected to the outer cylinder 7 by the stopper. By fixing the hub to the hub 2 by penetrating the block 6, the hub can be equipped with a derailing prevention device as shown in FIG. 4.

As described above, in the derailing prevention device mounted on the hub 2, the hub bolt 15 is broken during running of the vehicle due to metal fatigue or the like, and a state in which the tire wheel 17 cannot be fixed to the wheel mounting drum 1 occurs. In this case, as shown in FIG. 5, even when the tire wheel 17 hits the inner cylinder 3 and pushes the inner cylinder 3 outward, the stopper block 6 is engaged with the concave portion 5. The inner cylinder 3 attached to the hub 2 prevents the inner cylinder 3 from being detached from the hub 2, so that it is possible to reliably prevent derailing during traveling.

Moreover, since the derailing prevention device is firmly fixed to the hub 2, no noise is generated during traveling.

[0020]

According to the derailing prevention device of the present invention,
Even if the tire wheel is not fixed to the wheel mounting drum due to breakage of the hub bolt, etc. Can be prevented.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a configuration of a derailment prevention device according to the present invention.

FIG. 2 is a longitudinal cross-sectional view of a main part on a side surface showing a state in which the derailing prevention device is mounted on a hub.

FIG. 3 is an explanatory diagram showing a state in which the derailing prevention device is mounted on a hub.

FIG. 4 is a perspective view showing a state in which the derailing prevention device is mounted on a hub.

FIG. 5 is an explanatory view showing a state in which the hub bolt is broken.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 wheel mounting drum 2 hub 3 inner cylinder 4 support hole 5 recess 6 stopper block 7 outer cylinder 17 tire wheel 20 retaining

Claims (1)

[Claims] 1. A derailing prevention device mounted on a hub protruding from a wheel mounting drum and having the following requirements. (A) The inner cylinder fitted to the hub has an outer diameter larger than the inner diameter of the tire wheel, and a support hole is formed in the peripheral wall at a position corresponding to the recess on the outer peripheral surface of the hub. A stopper block that engages with the concave portion is detachably supported in the hole. (B) The stopper block is engaged with the concave portion so that the upper surface of the stopper block projects from the outer peripheral surface of the inner cylinder. (C) The outer cylinder fitted into the inner cylinder is formed so that the inner diameter is equal to the outer diameter formed by the stopper block. A stopper is formed to engage with the stopper block when fitted to the inner cylinder so that it does not come off from the inner cylinder.