JP2009274465A - Vehicular wheel fall-off preventer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wheel fall-off preventer which is easily fitted to a wheel hub and capable of reliably preventing a wheel from falling off. <P>SOLUTION: The wheel fall-off preventer comprises a plurality of arc-shaped stopper members 20 and 21 to be fitted along an outer circumference of a connection part 22 of a wheel hub 3, and bolts 32 and nuts 33 for connecting the stopper members and fastening and fixing the stopper members to the outer circumference of the connection part 11. The outside diameter of a ring to be formed of the fastened and fixed stopper members 20 and 21 is set to be larger than the inside diameter of a tire wheel, and the inside diameter of the ring is set to be smaller than the outside diameter of a flange part 2. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a derailment prevention tool for preventing a derailment in which a tire wheel is detached from a wheel hub and a wheel is dropped from the vehicle in a vehicle such as an automobile.

  In a vehicle such as an automobile, a tire wheel mounted with a tire is fixed to a wheel hub fixed to an axle with a hub bolt, and the axle is rotated by the driving force of the engine so that the tire rotates and travels. Yes.

  Conventionally, in a transport vehicle such as a large truck, there are a number of accidents in which a hub bolt is broken due to overloading or a tire wheel being improperly mounted, and the tire wheel is detached and removed. As one of countermeasures against such a wheel-out accident, it has been proposed to prevent a wheel that has come off the wheel hub from dropping off from the vehicle.

For example, in Patent Document 1, a disc wheel is fitted and fixed to a hub that rotates integrally with an axle shaft, and a stopper with a stopper member larger in diameter than the fitting inner diameter of the disc wheel is fixed to the outer end surface of the hub. A stop device is described. Japanese Patent Application Laid-Open No. 2003-228561 describes a wheel slip prevention device in which a stopper pin is planted on an outer peripheral portion of a wheel hub in a vehicle in which a wheel to which a tire is attached is fixed to the wheel hub with a hub bolt. Further, in Patent Document 3, a cylindrical member having a hole corresponding to the concave portion of the outer peripheral surface of the hub that is fitted to the hub protruding from the wheel mounting drum and having a plurality of convex portions on the outer periphery, and around the cylindrical member An inner diameter of a tire wheel that is attached to a hub bolt that has an outer diameter formed by the convex portion protruding from the drum. A larger derailment protector is described. Further, Patent Document 4 describes a derailment prevention device in which an inner cylinder formed with an outer diameter larger than the inner diameter of a tire wheel is fitted to the outer peripheral surface of the hub and is prevented from being removed by a stopper block and the outer cylinder. .
Japanese Utility Model Publication No. 4-60701 Japanese Utility Model Publication No. 5-28704 Japanese Examined Patent Publication No. 7-55602 Japanese Patent No. 3217724

  When the diameter of the umbrella part formed integrally with the axle shaft is increased as in Patent Document 1, there is a difficulty that the wheel cannot be easily removed when the wheel is replaced. Further, even when a large-diameter plate is fixed to the umbrella portion with a tightening bolt, it is necessary to remove the plate when exchanging the wheels, and the exchanging work becomes complicated. In addition, if the fastening bolt that secures the umbrella part and the hub is removed during the replacement work, an accident due to poor fastening of the fastening bolt may occur.

  Also in Patent Document 2, an operation for attaching a plurality of stopper pins around the hub is required, and the operation for exchanging the wheels must be complicated. In addition, it is necessary to increase the strength so that the stopper pin implanted when the wheel comes off the hub can withstand the impact. However, if the stopper pin is thickened, the mounting hole to be drilled in the hub becomes larger. There is a risk that the strength of the steel will decrease.

  In Patent Documents 3 and 4, it is necessary to attach many parts such as an inner cylinder, a washer, a stopper block, and an outer cylinder to the hub, so that it takes time to remove and reattach the wheel when replacing the wheel. Become. Further, in these wheel-separation prevention devices, when the wheel is detached from the hub, the tire wheel is held by the inner cylinder so as not to be displaced. On the contrary, it is difficult to recognize that the wheel has come off.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a derailment prevention tool that can be easily attached to a wheel hub and can reliably prevent a wheel from falling off.

  The anti-wheel-removal device according to the present invention includes an axle having a disc-shaped flange portion provided at an end thereof, a cylindrical connecting portion projecting toward the flange portion, and an end surface of the connecting portion at the end surface. A wheel slip prevention device for a vehicle, comprising: a wheel hub fixed to a flange portion; and a tire wheel mounted on the outer periphery of the wheel hub and fixed to the wheel hub with a hub bolt, wherein A plurality of arc-shaped stopper members to be attached, and a fixing member that connects the stopper members and fastens and fixes the stopper members to the outer periphery of the connecting portion, and is formed by the stopper members that are fastened and fixed. The outer diameter of the ring is set to be larger than the inner diameter of the tire wheel, and the inner diameter of the ring is set to be smaller than the outer diameter of the flange portion. It is characterized in that is. Furthermore, the stopper member is characterized in that a convex portion formed on the inner peripheral surface side is combined with a concave portion formed on the peripheral surface of the connecting portion and fastened and fixed. Further, the stopper member is characterized in that a side surface contacting the flange portion is formed flush with the convex portion. Furthermore, the stopper member is provided with a restricting portion that protrudes from a side surface toward the tire wheel. Furthermore, the restriction part is attached to the stopper member in a replaceable manner.

  By having the above-described configuration, the plurality of stopper members are coupled and fixed by a fixing member along the outer periphery of the coupling portion of the wheel hub, and thus can be easily attached with an extremely simple structure. In addition, it is not necessary to change the wheel mounting mechanism such as making a screw hole in the hub or removing a tightening screw that fixes the hub, and the conventional wheel mounting mechanism can be attached to the conventional wheel mounting mechanism as it is.

  The outer diameter of the ring formed by the stopper member fixed by tightening is set to be larger than the inner diameter of the tire wheel, and the inner diameter of the ring is set to be smaller than the outer diameter of the flange portion. Therefore, it is possible to reliably prevent the wheels coming off the wheel hub from falling off. That is, if the side surface of the stopper member connected in a ring shape is attached in a state where it abuts against the flange portion, the stopper member is maintained in a stable state even if the detached tire wheel hits the stopper member. .

  Hereinafter, the present invention will be described in detail based on embodiments shown in the accompanying drawings. The embodiments described below are preferable specific examples for carrying out the present invention, and thus various technical limitations are made. However, the present invention is particularly limited in the following description. Unless otherwise specified, the present invention is not limited to these forms.

  FIG. 1 is an exploded perspective view in the case where the derailment prevention tool according to the present invention is attached to a rear wheel attachment mechanism of a truck. FIG. 2 is a perspective view showing a state in which the anti-wheel-removing tool is attached. FIG. 3 is a schematic cross-sectional view regarding a rear wheel mounting mechanism of a truck to which a derailment prevention tool is mounted.

  In the rear wheel mounting mechanism of the truck, a disk-like flange portion 2 is integrally formed at an end portion of an axle 1 that is driven to rotate by transmission of engine driving force, and a wheel hub 3 is disposed so as to surround the axle 1. It is attached.

  The wheel hub 3 includes a ring-shaped attachment portion 10 in which a plurality of hub bolts 12 are erected at a predetermined interval, and a cylindrical connection portion extending from the inner peripheral side of the attachment portion 10 toward the flange portion 2. 11 is provided. A screw hole is formed in the end surface of the connecting portion 11, and the connecting portion 11 is fixed to the flange portion 2 by a plurality of tightening screws 14 attached to the peripheral edge portion of the flange portion 2 at a predetermined interval.

  The hub bolt 12 erected on the mounting portion 10 has fitting holes formed on the inner peripheral side of the tire wheel W1 with the tire T1 attached to the outer peripheral portion and the tire wheel W2 with the tire T2 attached to the outer peripheral portion. The tire wheels W1 and W2 are overlapped and fixed to the mounting portion 10 by the hub nut 13 in a state where they are overlapped.

  The connecting portion 11 has a convex portion formed in a mountain shape corresponding to the mounting location of the tightening screw 14, a valley-shaped concave portion is formed between the mounting locations, and the outer peripheral surface is formed in a wave shape.

  The derailment prevention tool 4 includes arcuate stopper members 20 and 21. The stopper member 20 has a shaft support 20a at one end and a tightening portion 20b at the other end. The stopper member 21 has a shaft support portion 21a at one end and a tightening portion 21b at the other end.

  The shaft support portions 20a and 21a are formed in a rectangular shape and project outward, and are formed so as to be thinner than the stopper member, and can be overlapped so as to mesh with each other. Further, shaft support holes 20 c and 21 c are formed in the shaft support portions along the axial direction of the axle 1, and bolts 30 are inserted and screwed by nuts 31 with the shaft support holes aligned. Stopped.

  The tightening portions 20b and 21b are formed to protrude to the outer peripheral side with substantially the same thickness as the stopper member, and tightening holes 20d and 21d are formed along a direction orthogonal to the axial direction of the axle 1. . Bolts 32 are inserted and tightened with nuts 33 with the tightening holes aligned.

  In this example, the bolts 30 and nuts 31 of the shaft support part and the bolts 32 and nuts 33 of the tightening part correspond to the fixing member of the present invention.

  A convex portion 22 is formed on the inner peripheral surface of the stopper member 20, and the side surface of the convex portion 22 on the flange portion 2 side is formed to be flush with the side surface of the stopper member 20. A metal film may be formed on the inner peripheral surface of the stopper member 20. For the metal film, a metal material softer than the metal material of the wheel hub is used. For example, when iron is used as the metal material of the wheel hub, a copper metal film may be formed by plating or the like. By forming the metal film in this manner, even if the stopper member is pressed against the wheel hub when the derailment prevention tool is fastened and fixed, the wheel hub is prevented from biting into the stopper member and being damaged.

  A convex portion 23 is also formed on the inner peripheral surface of the stopper member 21, and the side surface of the convex portion 23 on the flange portion 2 side is formed to be flush with the side surface of the stopper member 21. A metal film similar to the stopper member 20 is also formed on the inner peripheral surface of the stopper member 21.

  When attaching the anti-derailment tool 4 to the connecting portion 11 of the wheel hub 3, the shaft support portions 20 a and 21 a of the stopper members 20 and 21 are temporarily fixed with bolts 30 and nuts 31 in advance. In this state, since the stopper members 20 and 21 are rotatable with respect to each other, the stopper members 20 and 21 can be easily mounted around the connecting portion 11 with the stopper members 20 and 21 being opened apart from each other.

  Then, the position of the stopper member in the circumferential direction is adjusted so that the convex portions 22 and 23 formed on the inner peripheral surfaces of the stopper members 20 and 21 are combined with the concave portion formed on the outer peripheral surface of the connecting portion 11. Further, the positions of the stopper members 20 and 21 are adjusted in the axial direction so that the side surfaces of the stopper members 20 and 21 abut against the flange portion 2.

  After the position adjustment, the fastening portions 20d and 21d of the stopper members 20 and 21 are joined so as to be held together, the bolt 32 is inserted into the fastening hole, and the nut 33 is screwed into the bolt 32 and the stopper members 20 and 21 are joined. Is fastened and fixed to the outer periphery of the connecting portion 11. Further, the bolt 30 and the nut 31 that are temporarily fixed are also fastened and fixed, and the stopper members 20 and 21 are integrated into a ring shape and fixed to the connecting portion 11 by pressure contact.

  The derailment prevention tool 4 that has been fastened and fixed has stopper members 20 and 21 formed in a ring shape and pressed against the outer peripheral surface of the connecting portion 11. And the outer diameter D1 of the ring formed by the stopper member is set so as to be larger than the inner diameter d1 of the opening fitted to the wheel hub 3 of the tire wheels W1 and W2. The inner diameter D2 of the ring formed by the stopper member is set to be smaller than the outer diameter d2 of the flange portion 2.

  Therefore, even when the hub bolt 12 is broken and the tire wheels W1 and W2 are detached from the wheel hub, the tire wheel falls off because the outer diameter of the ring formed by the stopper member is larger than the inner diameter of the opening of the tire wheel. Can be reliably prevented. Further, the inner diameter of the ring is made smaller than the outer diameter of the flange portion 2, and the ring is kept in contact with the flange portion 2, so that even if the tire wheel hits a stopper member constituting the ring, the anti-wheel-release prevention tool Is held in a stable state without being detached from the wheel hub.

  FIG. 4 is a cross-sectional view relating to the anti-derailing tool that is fastened and fixed. The convex portions 22 and 23 formed on the inner peripheral surfaces of the stopper members 20 and 21 are attached in combination with the concave portion 11 a of the connecting portion 11. Therefore, it is possible to prevent the ring formed by the stopper members 20 and 21 from being inadvertently rotated in the circumferential direction. Further, since the convex portions 22 and 23 are formed flush with the side surfaces of the stopper members 20 and 21, the convex portions 22 and 23 are also in contact with the stopper members 20 and 21 in contact with the flange portion 2. It becomes. Therefore, even when the areas where the stopper members 20 and 21 and the flange portion 2 are in contact with each other are small, it is possible to reliably prevent the anti-wheel removal tool from falling off the wheel hub by the contact between the convex portions 22 and 23.

  In the example described above, two stopper members are connected and fixed by fastening. However, three or more divided stopper members may be connected and fixed by fastening, and there is no particular limitation. . Moreover, the convex part formed in the internal peripheral surface of each stopper member does not need to be provided when the difference of the internal diameter of a ring and the outer diameter of a flange part is large. On the contrary, two or more convex portions may be formed to enhance the retaining effect of the anti-wheel preventing device. Moreover, you may use a well-known fixing member other than this also about the volt | bolt and nut which are used for a shaft support part and a fastening part. Further, the tightening portion may be fastened and fixed by a plurality of bolts and nuts.

FIG. 5 is a perspective view of a modified example of the stopper member. In this example, restricting portions 24 and 25 that protrude from the side surface of the stopper member toward the tire wheel are integrally formed. A plurality of restricting portions 24 and 25 are provided in each stopper member, all of which are set to the same length, with a slight gap (about 5 mm) between the tip of each restricting portion and the tire wheel. Is set. Also, the outer diameter of the virtual ring formed by the outer side surface at the tip of each restricting portion is set to be larger than the inner diameter of the tire wheel in the same manner as the outer diameter of the ring formed by connecting the stopper members. Therefore, even when the tire wheel is detached, the tire wheel abuts against the tip of the restricting portion and is prevented from being greatly displaced in the axial direction.
In addition, it is desirable that the formation position and the width of the restricting portion are set so as to be inserted between the hub bolts and integrally formed. Therefore, if it can be set between the hub bolts, the number of restricting portions can be increased.

  FIG. 6 is a perspective view of another modified example of the stopper member. In this example, the regulating bolts 26 and 27 having a predetermined length are attached in a replaceable manner as the regulating portion shown in FIG. The stopper member 20 has a plurality of mounting portions 20 e formed at equal intervals on the outer peripheral side surface. Each mounting portion is formed with a screw hole for screwing the regulating bolt 26, and the regulating bolt 26 is screwed to the mounting portion 20e with the nut 28 screwed therein. The nut 28 is tightened and fixed to prevent the restriction bolt from loosening.

  Similarly to the stopper member 20, the stopper member 21 has a plurality of mounting portions 21 e formed on the outer peripheral side surface, and a restriction bolt 27 and a nut 29 are screwed to be fastened and fixed.

  The restriction bolts 26 and 27 are attached so as to extend toward the tire wheel, and the tip thereof is set in a state where a slight gap (about 5 mm) is left between the restriction bolt and the tire wheel. Also, the outer diameter of the virtual ring formed by the tip of each regulating bolt is set to be larger than the inner diameter of the tire wheel in the same manner as the outer diameter of the ring formed by connecting the stopper members. Even when the tire wheel is detached, it is possible to prevent the tip end of the regulating bolt from coming into contact with the tire wheel and greatly shifting in the axial direction.

  Since the regulation bolts 26 and 27 can be easily replaced, the length of the regulation bolt can be selected according to the type of the tire wheel and attached to the stopper member. Further, it is desirable that the regulating bolt is set and attached so as to be inserted between the hub bolts. Therefore, if it can be set between the hub bolts, the number of regulating bolts can be increased.

  FIG. 7 is an exploded perspective view of another modified example of the stopper member. In this example, the shaft support portion of the above-described example is used as a tightening portion. That is, tightening portions 40a and 40b are formed at both ends of the arc-shaped stopper member 40, and similarly, tightening portions 41a and 41b are formed at both ends of the stopper member 41.

  Then, the tightening hole 40c drilled in the tightening portion 40a and the tightening hole 41c drilled in the tightening portion 41a are aligned, the bolt 50 is inserted, and the nut 51 is tightened and fixed. Further, the tightening hole 40d drilled in the tightening portion 40b and the tightening hole 41d drilled in the tightening portion 41b are aligned, the bolt 52 is inserted, and the nut 53 is tightened and fixed.

  Since the stopper members 40 and 41 are connected and fixed by the two tightening portions, it is possible to attach the anti-wheel-removing tool to the outer periphery of the connecting portion 11 more firmly.

It is a disassembled perspective view in the case of attaching the derailment prevention tool which concerns on this invention. It is a perspective view which shows the state which attached the derailment prevention tool. It is a schematic sectional drawing regarding the rear-wheel attachment mechanism to which the anti-wheel removal tool was attached. It is sectional drawing regarding the derailment prevention tool fastened and fixed. It is a perspective view regarding the modification of a stopper member. It is a perspective view regarding another modification of a stopper member. It is a disassembled perspective view regarding another modification of a stopper member.

Explanation of symbols

1 Axle 2 Flange 3 Wheel hub 4 Derailment prevention tool
10 Mounting part
11 Connecting part
12 Hub bolt
13 Hub nut
14 Tightening bolt
20 Stopper member
21 Stopper member
22 Convex
23 Convex
24 Regulatory Department
25 Regulatory Department
26 Regulatory bolt
27 Regulatory bolt
28 nuts
29 Nut
30 volts
31 Nut
32 volts
33 Nut
40 Stopper member
41 Stopper member
42 Convex
43 Convex
50 volts
51 nut
52 volts
53 Nut

Claims (5)

  An axle having a disc-shaped flange portion provided at an end thereof, a wheel-like hub provided with a cylindrical connecting portion protruding toward the flange portion and fixed to the flange portion at an end surface of the connecting portion; A vehicle derailment prevention device including a tire wheel mounted on an outer periphery and a tire wheel fixed to the wheel hub with a hub bolt, and a plurality of arc-shaped stopper members attached along the outer periphery of the connecting portion; A fixing member that connects the stopper member and fastens and fixes the stopper member to an outer periphery of the connecting portion, and an outer diameter of a ring formed by the tightened and fixed stopper member is an inner diameter of the tire wheel. And the inner diameter of the ring is set to be smaller than the outer diameter of the flange portion. Wheel preventer.   2. The dewheeling according to claim 1, wherein the stopper member is fastened and fixed by combining a convex portion formed on the inner peripheral surface side with a concave portion formed on the peripheral surface of the connecting portion. Prevention tool.   The wheel stopper according to claim 2, wherein the stopper member has a side surface that contacts the flange portion that is flush with the convex portion.   The wheel stopper according to any one of claims 1 to 3, wherein the stopper member is provided with a restricting portion that protrudes from a side surface toward the tire wheel.   The anti-wheel-removal tool according to claim 4, wherein the restricting portion is attached to the stopper member in a replaceable manner.

Images