JP2008149736A - Steering bush for prevention of accident by turning angle of tire in steering wheel operation - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a steering bush for prevention of an accident by a turning angle of a tire in steering wheel operation to prevent steering wheel operation impossibility due to increase of the turning angle of the tire by correcting a central axis of a steering rack. <P>SOLUTION: This steering bush 1 has a fitting part 4 in which a ring belt body part 7 to mount on a front member 6 mounted on the side of a car body is fitted on an outer peripheral surface of the steering bush 1 and a holding hole part 2 having a shape along the steering rack 8 into which the steering rack 8 is free to be inserted on a side surface of the steering bush 1. The holding hole part 2 is formed in a state that the central axis is slipped off to the side of the car body 6. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a steering bush for preventing accidents caused by a tire turning angle in steering operation. More specifically, the present invention relates to a steering bush for preventing an accident due to a tire turning angle in a steering operation that occurs when the connecting position of the tire rod end is changed or the tire turning angle is raised by another method.

  In general, the steering of the wheel in the steering operation of the automobile is performed by moving the tie lot 101 parallel to the front wheel axis to the left and right by the steering gear 103 directly connected to the handle 102 as shown in FIG. The knuckle arm 104 that is pivotally connected to the vehicle has an opening angle so that the traveling angle of the front wheel 105 can be freely operated.

  Accordingly, the hub 106 on which the tire is mounted is attached to the knuckle spindle of the steering knuckle pivotally supported by the axle so that the steering angle can be changed to the outside or the inside with respect to the traveling direction. The knuckle arm 104 is connected, and the knuckle arm 104 is connected to and supported by the tie rod 101 to provide a link mechanism.

  In such a mechanism, the amount of movement of the tire 101 by the steering gear 103 is limited, and the tire angle is determined by the link mechanism between the tire 101 and the knuckle arm 104. The current situation is that the cutting angle cannot be increased.

  Therefore, the present applicant has applied for a patent for a tire turning angle adjusting tool as shown in FIG. 6 so that the turning angle of the tire can be increased in an existing vehicle. In the tire turning angle adjusting tool 110 according to the present invention, a steering knuckle connecting hole 112 is formed at one end side of a connecting plate portion 111 formed of a steel plate, and a knuckle-arm connecting portion is connected to the other end side of the connecting plate portion 111. A hole portion 113 is formed, and a tie-lot connecting hole portion 114 is formed between the steering knuckle connecting hole portion 112 and the knuckle arm connecting hole portion 113.

  Therefore, the fastening angle bolt attached to the axial position of the steering knuckle 106 is removed from the tire turning angle adjusting tool 110 having the above configuration, and the fastening angle is fixed to the steering knuckle connecting hole 112 of the tire turning angle adjusting tool 110. The bolts 115 are inserted and fastened to the steering knuckle 106. On the other hand, the connection between the knuckle arm 108 and the tie rod end at the tip of the tie rod 109 is released, and the knuckle arm 108 and the knuckle arm connecting hole portion of the tire turning angle adjusting tool 110 are connected and fixed. -It is set as the structure which supports the end 110 and the tie-lot connection hole part 114 of the tire cutting angle adjusting tool 110 (refer patent document 1).

JP 2006-182085 A

  In the increase adjustment of the turning angle by the tire turning angle adjuster, the shorter the knuckle arm length, the larger the tire turning angle, and the smaller the turning angle becomes, the more effective the turning angle becomes.

  However, as shown in FIGS. 6 (a), 6 (b), and 6 (c), the cylindrical steering rack 120 in which the tyrot and the steering gear are accommodated is attached to the vehicle body 122 by a steering bush 121 made of, for example, a ring-shaped rubber member. .

  Therefore, at the preset tire turning angle, the pivotal support position between the tylot 101 and the knuckle arm 104 does not exceed the central axis of the steering rack 120. However, the tire turning angle adjustment tool increases the turning angle. When the tire is cut to the maximum in the direction of arrow A, the pivotal support position of the tie rod 101 and the knuckle arm 104 exceeds the central axis of the steering rack 120 as shown in FIG. Therefore, when trying to return the tire in the direction of arrow B in order to return the tire from this state, the pivot position of the tie rod 101 and the knuckle arm 104 exceeds the central axis of the steering rack 120. It is possible that the tire could not be returned and an accident occurred due to the inability to operate the steering wheel.

  The present invention was devised in view of the above points, and is based on a tire turning angle in steering operation that prevents inability to operate the steering wheel by increasing the turning angle of the tire by correcting the central axis of the steering rack. The purpose is to provide an accident prevention steering bush.

  In order to achieve the above object, the steering bush according to the present invention for preventing an accident due to a tire turning angle is provided when a steering rack including a tyrot and a steering gear is attached to a front member on the vehicle body side. In a cylindrical steering bushing fitted on the outer peripheral surface of the rack, a holding hole portion having an inner diameter through which the steering rack can be inserted is formed in the steering bush, and the holding hole portion is attached to the vehicle body. It is formed in a state where the central axis is shifted to the front member side.

  Here, the center axis of the holding hole portion of the steering bush is formed in a state of being shifted to the vehicle body side, so that the axis of the tie rod included in the steering rack enters the vehicle body side from the pivot point of the knuckle, When the tire is cut to the maximum extent, the axis of the tire does not exceed the pivot point of the knuckle, so that the tire can be returned without any trouble.

  In addition, since a flange portion is provided around both ends of the outer periphery of the steering bush, when the steering bush is attached to the front member between the flange portions, a fitting portion into which the steering bush receiving portion and the pressing metal fitting are inserted. Thus, the steering rack can be firmly attached to the front member via the steering bush.

  Further, by forming a cut portion from the outer peripheral surface of the steering bush to the holding hole portion, the steering bush can be easily attached from the cut portion when the steering bush is externally fitted to the outer peripheral surface of the steering rack. It can be attached.

  According to the steering bush of the present invention, since the shape does not change from the existing steering bush, the steering rack is moved to the front member side by replacing the steering bush attached to the steering rack connecting portion of the existing front member. It can be moved.

  Further, even when the turning angle is increased by a turning angle adjusting tool or the like with respect to the steering whose tire turning angle is limited, the steering rack is arranged as close as possible to the front member on the vehicle body side by the steering bush of the present invention. As a result, the cutting angle of the tire is increased, and it is possible to perform the operation without being locked when the tire is returned.

  Further, when a steering rack is attached to the front member by forming a fitting portion on the outer peripheral surface of the steering bush, a steering bush receiving portion and a pressing metal fitting provided on the front member are fitted in the fitting portion to fit the steering bush. The steering rack can be firmly attached to the front member without falling off.

Hereinafter, embodiments of the present invention will be described with reference to the drawings to provide an understanding of the present invention.
FIGS. 1A and 1B are perspective views showing examples of a steering bush to which the present invention is applied, and FIG. 2 is an explanatory view showing a state in which the steering bush to which the present invention is applied is attached to a vehicle body.

  The steering bush 1 shown here is formed in a cylindrical shape having a certain width from a synthetic resin material such as rubber. The steering bush 1 is formed so that the shape of the holding hole portion 2 is substantially the same as the shape along the outer peripheral edge of the steering rack so as to hold the outer peripheral surfaces on both sides of the steering rack (not shown). It is.

  And the fitting part 4 is formed between this collar part 3 and 3 by providing the collar part 3 along the both outer peripheral edges of the said steering bush 1. As shown in FIG. Further, a cut portion 5 is formed on the outer peripheral surface of the steering bush 1 by cutting it at right angles to the circumferential direction. When the steering rack is held, the cut portion 5 is opened so that it can be easily fitted onto the steering rack.

  The reason why the shape of the steering bush 1 shown in FIGS. 1A and 1B is different is because the shape of the outer peripheral surface of the steering rack differs depending on the position at which the steering rack is attached. There is no sex.

  Therefore, as shown in FIG. 2, the steering rack 8 provided with the tie lots 9 on both sides thereof is attached to the front member 6 attached to the vehicle body side. Tires (not shown) are mounted on both side ends of the front member 6, and the tire turning angle is adjusted by the tie lot 9.

  Here, the steering bush 1 described above with reference to FIGS. 1A and 1B is fitted on the outer peripheral surface of the steering rack 8. The steering bush 1 is attached in such a state that the cut 5 is opened and the outer peripheral surface of the steering rack 8 is extrapolated.

  In this case, one of the steering bushes 1 shown in FIG. 1 (a) is disposed between the steering bushing locking plates 17 that are provided around the outer peripheral surface of the steering rack 8 at approximately the same interval as the width of the steering bushing 1. As a result, the steering bush 1 is locked to the steering rack 8 and the position is fixed without shifting in the left-right direction.

  The steering bush 1 is attached to the steering rack connecting portion 14 disposed in both directions of the front member 6 in a state where the steering bush 1 is attached to the outer peripheral surface of the steering rack 8. A steering bush receiving portion 15 having a shape is formed.

  The steering bush receiving portion 15 and the press fitting are fitted by the fastening bolt 12 in a state in which the outer peripheral surface of the steering bush 1 is fitted in the steering bush receiving portion 15 and is held by the press fitting 7 which is bent and formed in a semicircular shape. 7, the steering bush 1 is attached to the steering rack connecting portion 14 disposed in both directions of the front member 6, so that the steering rack 8 is attached to the front member 13 at a predetermined interval.

  Here, the steering bush receiving portion 15 formed on the steering rack connecting portion 14 and the presser fitting 7 are fitted in the fitting portion 4 formed on the outer peripheral surface of the steering bush 1 so as to be fitted to each other. The steering bush 1 is not detached from the steering bush receiving portion 15 and the holding bracket 7 due to vibration of the vehicle body, and one steering bush 1 is fixed to the steering rack 8 by the steering bush locking plate 16. It is possible to prevent the steering rack 8 from shifting in the left-right direction.

  Therefore, as shown in FIGS. 3A and 3B, the steering bush 1 is attached by the steering bush receiving portion 15 and the presser fitting 7 of the steering rack connecting portion 14 of the front member 6 on the vehicle body side. The steering bush receiving portion 15 and the pressing metal 7 have the same width as the width of the fitting portion 4 of the steering bush 1 and the steering bush 1 in order to grip the outer peripheral surface of the steering bush 1 in a close contact state. A semicircular arc shape having substantially the same diameter is used.

  And it is set as the structure joined by the bolt 12 for fastening in the state which fitted the said steering bush 1. FIG. Therefore, the steering bush 1 inserted by the steering bush receiving portion 15 and the pressing metal 7 is firmly held without any gap between the steering bush 1 and the outer peripheral surface thereof.

  Here, the center line position of the holding hole portion 2 of the steering bush 1 is formed in a state shifted to the vehicle body side. That is, the outer peripheral shape of the steering bush 1 and the inner peripheral shape of the holding hole portion 2 are determined in advance by the inner diameter of the steering bush receiving portion 15 and the pressing metal 7 and the outer diameter of the steering rack 8. Therefore, in order to bring the steering bush 1 closer to the vehicle body side, the center line position of the holding hole 2 is formed in a state of being shifted to the front member 6 on the vehicle body side.

  Specifically, the maximum diameter of the steering bush 1 in FIG. 3A is 69 mm, the maximum diameter up to the fitting portion 7 surface is 61 mm, and the holding hole portion 2 diameter is 46 mm. The center line position of the holding hole 2 of the steering bush 1 is shifted to the vehicle body side by about 5 mm.

  As a result, the thickness of the steering bush 1 on the vehicle body side is about 3 mm, and the center axis of the steering rack 8 is arranged in the state of being close to the front member 6 on the vehicle body side by about 5 mm.

  Note that the steering bush described in detail in this embodiment is not necessarily formed of a synthetic resin material such as rubber, and may be any material such as light metal such as aluminum or wood, but is attached to the steering bush. In consideration of ease and the like, it is desirable to form the rubber material having excellent elasticity and moldability.

  In the present invention having the above-described configuration, as shown in FIGS. 4A and 4B, the steering rack 8 is attached by the steering bush 1 so as to be closer to the vehicle body side by about 5 mm as compared with the prior art. The axis of the tie lot 9 included in the rack 8 is a position where it enters the front member 6 side of the vehicle body from the pivot point 11 of the knuckle 10.

  As a result, as shown in FIG. 4B, when the tire is cut to the maximum, the axis of the tie lot 9 does not exceed the pivot point 11 of the knuckle 10, so that the tire can be returned without any trouble. Is possible.

It is a perspective view which shows an example of the steering bush to which this invention is applied. It is a perspective view which shows the example of attachment of the steering bush to which this invention is applied. It is a section explanatory view in the state where the steering bush to which the present invention was applied was attached to the vehicle body. It is operation | movement explanatory drawing by the steering bush to which this invention is applied. It is a mechanism figure which shows an example of the steering wheel operation by the conventional steering. It is explanatory drawing which shows an example of the tire turning angle adjusting tool in the conventional steering wheel operation. It is explanatory drawing which shows an example of the malfunction of steering wheel operation by the tire turning angle increase.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Steering bush 2 Holding hole part 3 Clamping part 4 Fitting part 5 Notch part 6 Front member 7 Holding metal fitting 8 Steering rack 9 Tylot 10 Knuckle 11 Pivoting point 12 Fastening bolt 14 Steering rack connection part 15 Steering bush receiving part 16 Steering bush Locking plate

Claims (3)

In a cylindrical steering bushing that is externally fitted to the outer peripheral surface of the steering rack when the steering rack including the tylot and the steering gear is attached to the front member on the vehicle body side,
The steering bush is formed with a holding hole portion having an inner diameter through which a steering rack can be inserted, and the holding hole portion is formed in a state where a central axis is shifted toward a front member attached to the vehicle body. Steering bush for preventing accidents caused by tire turning angle during steering operation. A flange portion is provided around both ends of the outer periphery of the steering bush to form a fitting portion into which the steering bush receiving portion and the holding fitting are inserted when the steering bush is attached to the front member between the flange portions. The steering bushing for preventing accidents due to a tire turning angle in steering operation according to claim 1. 3. A steering bush for preventing accidents due to a tire turning angle in steering operation according to claim 1, wherein a notch is formed from the outer peripheral surface of the steering bush to the holding hole.

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