JP4694384B2 - Steering lock device - Google Patents

Description

  The present invention relates to a steering lock device applied to a vehicle such as an automobile.

  Examples of conventional steering lock devices include the following. The lock body of the steering lock device is attached to a steering column portion of an automobile and stores a cylinder lock that is rotated by a key, and a guide portion that projects from the main body portion toward the steering shaft. Is integrated. Behind this cylinder lock is provided a cam member that is positioned in the main body portion and rotates integrally with the key rotor of the key cylinder. In addition, the guide portion has a frame shape surrounding the cam member and a spring. A lock member including a lock stopper biased toward the steering shaft and a lock bar having one end connected to the lock stopper is movably disposed.

  When the cylinder lock is in the locked state (the key rotor is in the “LOCK” position), the lock member is moved to the lock position by the biasing force of the spring, and the tip of the lock bar is engaged with the steering shaft side to Lock the steering shaft so that it cannot rotate. On the other hand, when the cylinder lock is changed from the locked state to the non-locked state (the key rotor is in the “ACC” or “ON” position), the cam member opposes the urging force of the spring to the side opposite to the steering shaft side. It is configured to allow rotation of the steering shaft by moving to the unlocking position and releasing the engagement of the lock bar with respect to the steering shaft (see, for example, Patent Document 1).

As another conventional steering lock device, for example, a lock body of a steering lock device is attached to a steering column portion by an inrow portion provided on the lock body, and the lock body is made of metal such as aluminum. Some are formed (for example, refer to Patent Document 2).
Japanese Patent Laid-Open No. 10-264770 JP 2004-314745 A

  However, according to Patent Document 2, an excessive force is applied to the steering shaft while the cylinder lock is locked and engaged with the steering shaft side to lock the steering shaft in a non-rotatable state. If it tries to do so, the inlay part provided in the lock body may be scraped or damaged through the lock bar.

  Further, in the locked and locked state described above, it is also necessary to satisfy legal requirements so that the steering shaft or the steering lock device does not malfunction at a predetermined torsional torque.

  The purpose of the present invention is to lock the steering shaft in a state where the cylinder lock is locked and engages with the steering shaft side so that the steering shaft cannot be rotated. An object of the present invention is to provide a steering lock device that does not break or the like.

According to one aspect of the present invention, a lock body having an inrow portion that is fitted and attached to an attachment hole portion of a steering column post of a vehicle, and a key rotor that is rotated by a key, the interior of the lock body is provided. A key cylinder housed in the lock body, and a lock bar housed inside the lock body and moved between a lock position for locking the steering shaft by rotation of the key rotor and an unlock position for releasing the lock; When the steering shaft is locked and disposed between the inrow portion provided in the lock body and the mounting hole portion, the inrow portion is damaged by the rotational force of the steering received through the lock bar. and suppressing the reinforcing member, the steering lock device characterized in that it comprises a Subjected to.

  According to the embodiment of the present invention, when the cylinder lock is locked and engaged with the steering shaft side to lock the steering shaft so as not to rotate, it is rotated by applying an excessive force to the steering shaft. Even if it makes it, it becomes possible to provide the steering lock device in which damage etc. do not occur.

(Embodiment of the Invention)

  FIG. 1 is a view showing a steering lock device 20 according to an embodiment of the present invention mounted on a steering column post 10 of a vehicle such as an automobile.

  FIG. 2 shows the steering lock device 20 mounted on the steering column post 10, showing a cross section of a portion where the steering lock device 20 is attached to the steering column post 10 with screws, and the steering lock device 20 in FIG. 1. It is AA sectional drawing in the upper direction.

  As shown in these drawings, the steering lock device 20 includes a lock body 21. The lock body 21 is formed of a predetermined material. For example, the lock body 21 is formed by magnesium die casting or aluminum die casting, and has a bottomed cylindrical housing 22 and a bottom side of the housing 22 (in FIG. 2, A part of the left side) is integrally provided with a mounting portion 23 formed so as to project at a predetermined angle with respect to the central axis of the housing 22. The lock body 21 is attached to the steering column post 10 of the vehicle by the attachment bolt 12 in the attachment screw hole 24 formed in the attachment portion 23 using the attachment member 11 at a predetermined position of the steering column post 10.

  In a state where the lock body 21 is attached to the steering column post 10, a lock bar 49, which will be described later, protruding from the substantially central portion of the attachment portion 23 can be engaged or disengaged with the groove portion 13 a of the steering shaft 13. It is configured.

  FIG. 3 is a sectional view for explaining the internal configuration of the steering lock device 20, and is a sectional view taken along line BB in FIG.

  On the steering column post 10 side of the lock body 21, an ignition switch 5 that is a rotary switch is fixed to the lock body 21 on the front side of the vehicle. The ignition switch 5 is connected to a control circuit (not shown) provided in the vehicle via a wiring (not shown).

  A cylindrical key cylinder 30 is provided inside the housing 22 of the lock body 21. Although not shown, the key cylinder 30 is fixed to the lock body 21 so that it cannot be easily removed from the outside of the lock body 21. A key insertion port 32 is formed in the key rotor 31 of the key cylinder 30, and the key rotor 31 is configured to be rotated by a predetermined angle by a rotation operation of the key 33 inserted from the key insertion port 32. Yes. A gear 34, which is a bevel gear, is engaged with the key rotor 31 of the key cylinder 30, and the gear 34 and the key rotor 31 rotate integrally.

  4A and 4B are views showing the shape of the gear 34 which is a bevel gear, where FIG. 4A is an upper plan view and FIG. 4B is a front view. The gear 34 includes a gear main body 40 and a support shaft 41, and teeth 42 are formed at the tip of the gear main body 40 at approximately half of the outer peripheral edge. Further, an engaging portion 43 protruding from the outer periphery of the gear body 40 is formed on the side of the gear body 40 where the teeth 42 are not formed. An inclined surface 44 that is inclined at a predetermined angle with respect to the axial direction of the gear 34 is formed on one side of the engaging portion 43, and one end portion of the inclined surface 44 is continuous with the holding surface 45 of the engaging portion 43. Yes. A continuous portion of the inclined surface 44 and the holding surface 45 is formed so as to slightly protrude toward the base end side of the gear 34 (the lower side in FIG. 5B).

  In the gear main body 40 of the gear 34, a columnar support shaft 41 is formed so as to protrude coaxially with the gear main body 40 at the center of the tip portion. The support shaft 41 is inserted into a gear mounting hole 46 formed in the bottom wall of the housing 22 of the lock body 21, and the gear 34 is rotatably supported by the lock body 21.

  A gear 47, which is a bevel gear, meshes with the teeth 42 of the gear 34 on the ignition switch 5 side. The gear 47 is disposed so that the central axis is orthogonal to the central axis of the gear 34, and the gear 47 is connected to a shaft that switches the contact point of the ignition switch 5. Then, when the gear 47 is rotated by the rotation of the gear 34, the ignition switch 5 is rotated, and the contact of the ignition switch 5 is switched.

  Further, on the vehicle rear side of the gear 34, a slider 48 formed in a substantially L-shaped block shape is in contact with the inclined surface 44 of the engaging portion 43 of the gear 34. Further, a lock bar 49 is provided on the vehicle rear side of the slider 48. The lock bar 49 has a bar shape with a substantially rectangular cross section, and the protruding portion 48a of the slider 48 is engaged with a groove portion 49a formed in the middle portion in the longitudinal direction.

  A circular hole 50 is formed in the base end portion (right end portion in FIG. 3) of the lock bar 49. A coil spring 51 is disposed between the circular hole 50 and the inner wall of the lock body 21, and the lock bar 49 is always urged toward the steering shaft 13. Further, the front end portion (left end portion in FIG. 1) of the lock bar 49 is formed to be inclined at a predetermined angle with respect to the central axis of the lock bar 49, and the front end portion is formed in the groove portion 13 a of the steering shaft 13. It is configured to be engaged or disengaged.

  The lock bar 49 has a lock position (shown in FIG. 3) for locking the steering shaft 13 and an unlock position (unlocked for unlocking the steering shaft 13) along a lock bar hole 21a provided in the lock body 21. The lock body 21 is held so as to be movable between the state shown in FIG.

  5A and 5B are views showing the attachment portion 23 of the lock body 21. FIG. 5A is a view of the attachment portion 23 seen from the C direction in FIG. 2, and FIG. It is.

  The lock body 21 is attached to the steering column post 10 of the vehicle by means of a mounting bolt in a mounting screw hole 24 formed in the mounting portion 23 using the mounting member 11 at a predetermined position of the steering column post 10.

  The steering column post 10 has a substantially oval-shaped inlay hole 10a through which the lock body 21 is mounted.

  The attachment portion 23 is formed with an in-row portion 23 a that protrudes from the periphery and fits into the in-row hole 10 a of the steering column post 10 so as to be positioned with respect to the steering column post 10. Reinforcing plate mounting grooves 23b are formed with a predetermined width W2 at both ends in the circumferential direction of the steering column post 10 of the inrow portion 23a.

FIG. 6 shows the shape of the reinforcing plate 60, where (a) is a front view and (b) is a side view. Reinforcing plate 60 is wide portion 6 0 a, the tapered portion 6 0 b, the curvature portion 6 0 c, and is formed by the narrow portion 6 0 d, by bending at a predetermined curvature in the curvature portion 6 0 c It is formed in a substantially U shape. Further, the width W1 shown in the figure is formed larger than the width W2 of the reinforcing plate mounting groove 23b. The reinforcing plate 60 is preferably made of a material having excellent spring properties and a high hardness, and is harder than the material forming the lock body 21, and bainite steel and SK stainless steel are particularly preferable. Moreover, what has the hardness of Hv400 or more by Vickers hardness (JISZ2244) is preferable.

  FIG. 7 shows a reinforcing plate 61 having another shape, in which (a) is a front view and (b) is a side view. The reinforcing plate 61 is formed of a plate portion 61a and a spring portion 61b, and the spring portion 61b is formed by partially punching the plate portion 61a and bending it at a predetermined angle. The width W1 shown in the figure is formed larger than the width W2 of the reinforcing plate attachment groove 23b. The reinforcing plate 61 is preferably made of a material having excellent spring properties and a high hardness, and is harder than the material forming the lock body 21, and bainite steel and SK stainless steel are particularly preferable. Moreover, what has the hardness of Hv400 or more by Vickers hardness is preferable.

  Here, in FIG. 5, the reinforcing plate 60 is embedded in or attached to the reinforcing plate mounting groove 23b in a predetermined direction. The mounting is performed by press-fitting, but is not limited thereto, and may be bonding, welding, or the like. If the reinforcing plate 60 is disposed between the inrow portion 23a and the inrow hole 10a that is the attachment hole portion, the reinforcing plate The function as is demonstrated. The mounting of the reinforcing plate 61 is the same as the mounting of the reinforcing plate 60.

  Next, the operation of the present embodiment will be described. FIG. 3 described above shows a state in which the lock bar 49 is engaged with the steering shaft 13 in the steering lock device 20.

  FIG. 8 is a view showing a state in which the engagement between the lock bar 49 and the steering shaft 13 is released in the steering lock device 20. In the steering lock device 20 configured as described above, the key rotor 31 of the key cylinder 30 is located at the “LOCK” position in a state where the lock bar 49 is engaged with the steering shaft 13 (shown in FIG. 3). When the key 33 is inserted into the key insertion slot 32 of the key rotor 31 and the key rotor 31 is rotated to the operating position (“ACC”, “ON”, “START” position), the gear rotates integrally with the key rotor 31. 34, the ignition switch 5 is rotated via the gear 47.

  At this time, the slider 48 that has come into contact with the inclined surface 44 of the engaging portion 43 of the gear 34 by sliding of the gear 34 slides on the inclined surface 44 and is opposite to the steering shaft 13 (right side in FIG. 8). Moved to. For this reason, the lock bar 49 in which the protrusion 48 a of the slider 48 is engaged with the groove 49 a is moved to the side opposite to the steering shaft 13 against the urging force of the coil spring 51. Then, as shown in FIG. 8, when the slider 48 reaches the holding surface 45 of the engaging portion 43 of the gear 34, the lock of the steering shaft 13 by the lock bar 49 is completely released, and the slider 48 causes the lock bar 49 to move. Holds in unlocked position.

  In addition, in the engaging part 43 of the gear 34, since the continuous part of the inclined surface 44 and the holding surface 45 protrudes to the base end side of the gear 34 (refer FIG.4 (b)), it hold | maintains at the holding surface 45. The slider 48 is prevented from moving to the inclined surface 44 side when unnecessary. This prevents the lock bar 49 from protruding toward the steering shaft 13 when unnecessary.

On the other hand, when the key 33 inserted into the key insertion port 32 of the key rotor 31 is rotated to the “LOCK” position in a state where the lock bar 49 is moved to the unlock position (shown in FIG. 8), the gear 34 is operated. Rotates integrally with the key rotor 31, and the slider 48 moves from the holding surface 45 of the engaging portion 43 of the gear 34 to the inclined surface 44 of the engaging portion 43. For this reason, the lock bar 49 moves to the steering shaft 13 side together with the slider 48 by the urging force of the coil spring 51. As a result, the lock bar 49 engages with the groove 13a of the steering shaft 13, and the steering shaft 13 is locked.
(Effect of the embodiment of the present invention)

  In the steering lock device 20, when the key rotor 31 is located at the “LOCK” position, the lock bar 49 protrudes toward the steering shaft 13, engages with the groove 13 a of the steering shaft 13, and the steering shaft 13 is locked. It is the state that was done. In this state, even if the steering 1 is to be rotated, the lock bar 49 engaged with the groove 13 a prevents the steering shaft 13 from rotating. Therefore, the steering 1 excludes the clearance between the groove 13 a and the lock bar 49. Cannot rotate.

  If the steering 1 is forcibly rotated in this state, the rotational force applied to the steering 1 is transmitted to the steering shaft 13, and an excessive force is transmitted from the groove 13 a of the steering shaft 13 to the lock bar 49. Excessive force applied to the lock bar 49 is applied to the in-row part 23 a via the reinforcing plate 60.

  However, in the embodiment of the present invention, since the reinforcing plate 60 is formed of a material harder than the material forming the lock body 21, the damage to the inrow portion 23a due to excessive force is suppressed. It becomes possible. In particular, when the in-row portion 23a is integrally formed with the lock body 21 by magnesium die casting or aluminum die casting, the strength is weak and the effect of the reinforcing plate 60 is more exhibited.

  Moreover, the effect of the reinforcement board 60 is more effectively exhibited by using the material which has the hardness of Hv400 or more as Vickers hardness as the reinforcement board 60. FIG. The above effect is the same for the reinforcing plate 61.

  By the way, when the steering lock device 20 is in the locked state, it is necessary to satisfy the legal requirements so that the steering shaft 13 or the steering lock device 20 does not malfunction at a predetermined torsional torque. For example, as a reference value, there is a strength requirement of a torsion torque of 300 N · m. According to the embodiment of the present invention, by providing the reinforcing plate 60 in the in-row portion 23a, the steering lock device 20 that satisfies the above requirements is possible. The above effect is the same for the reinforcing plate 61.

It is a figure showing steering lock device 20 concerning an embodiment of the invention with which steering column post 10 of vehicles, such as a car, was equipped. 1 shows a steering lock device 20 mounted on a steering column post 10, showing a cross section of a portion where the steering lock device 20 is attached to the steering column post 10 with a screw, and above the steering lock device 20 in FIG. It is AA sectional drawing. FIG. 3 is a sectional view for explaining an internal configuration of the steering lock device 20 and is a sectional view taken along line BB in FIG. 2. It is a figure which shows the shape of the gear 34 which is a bevel gear, (a) is an upper top view, (b) is a front view. It is a figure which shows the attaching part 23 of the lock body 21, (a) is the figure which looked at the attaching part 23 from C direction in FIG. 2, (b) is the DD cross section in FIG. The shape of the reinforcement board 60 is shown, (a) is a front view, (b) is a side view. The reinforcement board 61 by another shape is shown, (a) is a front view, (b) is a side view. In the steering lock device 20, it is a figure which shows the state by which engagement with the lock bar 49 and the steering shaft 13 was cancelled | released.

Explanation of symbols

1 Steering 5 Ignition Switch 10 Steering Column Post 11 Mounting Member 12 Mounting Bolt 13 Steering Shaft 20 Steering Lock Device 21 Lock Body 22 Housing 23 Mounting Portion 24 Mounting Screw Hole 30 Key Cylinder 31 Key Rotor 32 Key Insertion Port 33 Key 34 Gear 40 Body Portion 41 Support shaft 42 Teeth 43 Engagement portion 44 Inclined surface 45 Holding surface 46 Gear mounting hole 47 Gear 48 Slider 49 Lock bar 50 Circular hole 51 Coil spring 60, 61 Reinforcement plate

Claims (4)

A lock body having an inrow portion fitted and attached to a mounting hole portion of a steering column post of a vehicle;
A key cylinder housed inside the lock body having a key rotor rotated by a key;
A lock bar housed in the lock body and moved between a lock position for locking the steering shaft by rotation of the key rotor and an unlock position for releasing the lock;
When the steering shaft is locked and disposed between the inrow portion provided in the lock body and the mounting hole portion, the inrow portion is damaged by the rotational force of the steering received through the lock bar. A steering lock device comprising: a reinforcing member that suppresses vibration.   The steering lock device according to claim 1, wherein the reinforcing member is made of a material harder than a material of the lock body.   The steering lock device according to claim 1, wherein the reinforcing member is formed by a wide portion, a tapered portion, a curvature portion, and a narrow portion.   The steering lock device according to claim 1, wherein the reinforcing member is embedded in a reinforcing plate mounting groove formed in the in-row portion.

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