JP3966041B2 - Steering lock device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a steering lock device for preventing theft of an automobile according to the present invention, and this steering lock device makes a steering wheel non-rotatable.
[0002]
[Prior art]
In order to prevent theft of the automobile, a steering lock device is generally used that not only stops the engine but also disables the steering wheel when the engine key of the ignition switch is turned off and pulled out.
[0003]
As this type of steering lock device, for example, as shown in Utility Model Registration No. 2150378 by the applicant of the present application, in FIGS. 12 and 13, a steering shaft 31 that rotates inside a steering column 32, and the steering shaft The lock bracket 33 as a key lock member is fixed to the outer peripheral surface of the intermediate portion 31 by welding, and the lock pin 35 is engaged with the engagement hole 34 drilled in the lock bracket 33, thereby rotating the steering wheel. The one that tried to prevent is known.
[0004]
As a result, when the engine key of the ignition switch is rotated to a position where it can be removed, the lock pin 35 elastically pops out to the inside of the steering column 32, and the lock pin 35 is turned in a specific direction. An inner end portion of 35 enters the engagement hole 34 and prevents rotation of the steering shaft 31 directly connected to the steering wheel.
[0005]
[Problems to be solved by the invention]
By the way, in the above-described conventional steering device, when the difference between the outer diameter of the steering shaft 31 and the inner diameter of the steering column 32 becomes large, the thick key lock member is cut out or the thick pipe is searched for press working. And bulging outward.
[0006]
Further, in recent years, a slip ring such as a tolerance ring is often attached to the key lock member from the viewpoint of preventing theft. In that case, the lock function was insufficient only by bulging the key lock member outward by pressing. Therefore, there has been a problem that it is unavoidable to use a thick pipe or to cut out the key lock member.
[0007]
Accordingly, an object of the present invention is to provide a tolerance specification at a low cost by interposing a sliding ring between the steering shaft and the key lock member, and buffering a large breaking load that occurs instantaneously at the time of theft. The lock member is made of a sheet metal or is formed by integral molding of a pipe to reduce the weight of the device and reduce the cost.
[0008]
[Means for Solving the Problems]
The above object of the present invention is to provide a steering shaft that rotates based on the operation of the steering wheel, a key lock member disposed on the outer periphery of the steering shaft, and a slip ring that is interposed between the steering shaft and the key lock member. And the key lock member has a part of the outer periphery of the pipe-like member bulged outward, and a key engagement hole that allows the key to be engaged with the bulge portion. It is effectively achieved by being perforated and having a slope formed in the circumferential direction from the key engagement hole on the outer peripheral surface of the pipe-shaped member .
[0012]
Further, the above object can be achieved more effectively by starting to slide the sliding ring with a torque of 100 N · m or more.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0014]
FIG. 1 is a diagram showing a schematic configuration of a steering lock device according to a first embodiment of the present invention. In FIG. 1, reference numeral 1 denotes a steering shaft that rotates based on an operation of a steering wheel (not shown). A key lock member 2 is disposed on the outer periphery of the shaft 1. The key lock member 2 includes a support inner 3 that forms a cylindrical base, and a lock bracket 4 that is fixed to the outer peripheral surface of the support inner 3. The lock bracket 4 has an inverted U-shaped cross-section formed by bulging the center portion outward, and a key insertion hole 4a is drilled in the center portion.
[0015]
Further, a slip ring 5 such as a tolerance ring is inserted between the steering shaft 1 and the key lock member 2 so as to secure a slide portion between the steering shaft 1 and the key lock member 2. Thereby, the lock pin 6 of the engine key of the ignition switch (not shown) can be engaged with the key insertion hole 4a so that it can reciprocate in the vertical direction in FIG. 1, and the rotation of the steering shaft 1 is prevented. It is designed to lock.
[0016]
Further, as shown in FIG. 2, the lock bracket 4 is fixed to the outer peripheral surface of the support inner 3 by welding with a flange portion 4b. In this case, welding of the flange portion 4b may be performed over the entire circumference, or may be partial welding as long as a predetermined mounting strength is provided.
[0017]
In the flange portion 4b, as shown in FIG. 3, serration grooves (or knurled grooves) 7 are formed in both the lock bracket 4 and the support inner 3, and the lock bracket 4 is press-fitted into the support inner 3 and attached. It is like that. The serration groove (or knurled groove) 7 may be provided in either the lock bracket 4 or the support inner 3 so that a predetermined attachment strength can be obtained.
[0018]
FIG. 4 is a diagram showing a mounting process in the flange portion 4b of the lock bracket 4. First, the flange portion 4b is processed to form serration grooves (or knurled grooves) 7 (a), and the serrations are formed. A groove (or knurled groove) 7 is overlapped with a corresponding portion of the support inner 3 (b) and press-fitted with the flange portion 4b, or both side edges of the support inner 3 are bent upward (c) in FIG. 4 is fixed to the support inner 3.
[0019]
Further, as shown in FIG. 5, a notch groove 8 is partially formed on the periphery of the flange portion 4 b of the lock bracket 4, and the periphery of the support inner 3 is formed at a position corresponding to the notch groove 8. 5 is folded upward (in the direction of the arrow in FIG. 5), and the lock bracket 4 is engaged with and secured to the support inner 3.
[0020]
Moreover, in the said Example, although it is the example which bulged the lock bracket 4 side, FIG. 6 shows the case where conversely the support inner 3 side is bulged. In the figure, a support inner 3 having a central portion bulged (downward in FIG. 6) is disposed outside the steering shaft 1. The support inner 3 is provided with a lock bracket 4 made of a pipe-like member along the outer peripheral surface, and is fixed to the support inner 3 by welding or the method described above. On the outer periphery of the lock bracket 4, a key engagement hole 4 c is formed at a position corresponding to the bulging portion of the support inner 3, and is engaged with the lock pin 6. Further, a slip ring 5 is disposed between the steering shaft 1 and the support inner 3 so as to secure a slip portion for rotation of the steering shaft 1 and the support inner 3.
[0021]
Next, FIGS. 7 and 8 are views showing a steering lock device according to a second embodiment of the present invention. As a key lock member, a cylindrical sliding ring 9 is provided on the outer periphery of the steering shaft 1. A plurality of lock plates 10, 10,... Having a L-shaped cross section as shown in FIG. 9 are arranged, and a rectangular cutout groove 11 is formed in a part of the lock plate 10. The lock plates 10, 10... Are arranged in parallel so that the notches 11 are arranged at positions corresponding to each other, and are engaged with the lock pin 12 by the plurality of notches 11, 11,. Grooves are formed.
[0022]
Further, as shown in FIG. 10, the lock plate 13 is formed in an annular shape, and a rectangular cutout 14 is formed in a part of the lock plate 13, and the lock plate 13 is used in FIGS. The lock plate 10 may be replaced, and the same operation and effect can be achieved.
[0023]
FIG. 11 is a view showing a steering lock device according to a third embodiment of the present invention, and is an example in which the support inner 3 and the lock bracket 4 in the first embodiment are integrated. The key lock member 15 is formed in a pipe shape, and a part of the outer periphery of the key lock member 15 is bulged outwardly by press working to form an elongated engagement hole 16. Further, a gentle slope 17 is formed in the circumferential direction from the engagement hole 16 on the outer peripheral surface of the key lock member 15, and a lock pin (not shown) is smoothly dropped into the engagement hole 15 by the guide of the slope 17. It is designed to be engaged. And a sliding part is ensured by inserting a sliding ring between the key lock member 15 and a steering shaft.
[0024]
Therefore, in the first embodiment, the key lock member 2 is arranged on the outer periphery of the steering shaft 1 using two pipe-like members, and the slip ring 5 is inserted between the steering shaft 1 and theft. Even if a considerably large impact load is applied, the impact load can be buffered by the sliding of the sliding ring 5. Further, since the key lock member 2 is configured by combining two pipes, it is possible to reduce the weight and cost of the apparatus.
[0025]
The second embodiment is an example in which a ring-shaped lock plate 10 is provided outside the steering shaft 1 as a key lock member, and the slip ring 9 is inserted between the key shaft and the steering shaft 1. Thereby, the same operation and effect as the first embodiment can be obtained.
[0026]
Further, the third embodiment is an example in which the support inner 3 and the lock bracket 4 are integrated as a key lock member, and the elongated engagement is achieved by bulging a part of the outer periphery outward by press working. A hole 16 was formed, and a slip ring was inserted between the hole 16 and the steering shaft 1. Thereby, there can exist an effect | action and effect similar to said each Example.
[0027]
In each of the above embodiments, the sliding rings 5 and 9 start to slide when a torque of 100 N · m or more is applied. In other words, the numerical value (100 N · m) of this sliding ring (tolerance ring) is a numerical value that makes it difficult for the driver to perform steady steering. This prevents the key lock device from being destroyed by the buffering action.
[0028]
As a result, in each of the above embodiments, since the sliding ring is inserted between the steering shaft and the key lock member, the sliding action of the sliding ring cushions a considerably large destructive load generated during theft, and the key lock. The destruction of the apparatus can be prevented. In addition, the key lock member can be manufactured at low cost by press working or bulging integral molding of the pipe, so the weight of the device can be reduced and the cost can be reduced. Can be provided.
[0029]
【The invention's effect】
As described above, according to the steering lock device according to the present invention, as a key lock member, a separate pipe (support inner or lock bracket) or the like is combined, ring-shaped press-molded products are stacked, or a pressing technique is used. The steering lock device can be manufactured at a low cost, and a predetermined tolerance specification can be easily provided. At that time, the lock bracket can be easily attached to the support inner or the like while maintaining a sufficient strength by using a technique such as welding, press-fitting, or caulking.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a configuration of a steering lock device according to a first embodiment of the present invention.
FIG. 2 is a view showing a state in which the peripheral edges of both are attached by welding when attaching the lock bracket to the support inner;
FIG. 3 is a view showing a state in which a serration groove or the like is formed on the periphery of the supporting inner, and the periphery of the lock bracket is press-fitted and attached to the serration groove or the like.
FIGS. 4A, 4B, and 4C are views showing a process of attaching a lock bracket to a support inner. FIGS. Here, (b) shows a state where the lock bracket is press-fitted into the support inner, and (c) shows a state where the periphery of the support inner is further crimped.
FIG. 5 is a view showing a state in which a notch groove is formed in the periphery of the lock bracket, and the periphery of the support inner is folded and attached to the notch groove.
FIG. 6 is a view showing a state in which a bulging process is performed on the support inner side and the outer side of the steering shaft is arranged without bulging the key lock side.
FIG. 7 is a cross-sectional view showing a configuration of a steering lock device according to a second embodiment of the present invention.
8 is a side view of the steering lock device of FIG. 7;
9 is a view of a portion of the lock bracket of FIG. 7 cut away and viewed from obliquely above.
FIG. 10 is a view showing a modification of the lock bracket of FIG. 9;
FIG. 11 is a perspective view showing a key lock member according to a third embodiment of the steering lock device of the present invention.
FIG. 12 is a partial cross-sectional view showing an overall configuration of a conventional steering lock device.
FIG. 13 is a cross-sectional view of a lock bracket used in a conventional steering lock device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Steering shaft 2 Key lock member 3 Support inner 4 Lock bracket 4a Key insertion hole 4b Flange part 4c Key engagement hole 5 Sliding ring 6 Lock pin 7 Serration groove 8 Notch groove 9 Sliding ring 10 Lock plate 11 Notch 12 Lock pin 13 Lock plate 14 Notch 15 Key lock member 16 Engagement hole

Claims (2)

A steering shaft that rotates based on the operation of the steering wheel;
A key lock member disposed on the outer periphery of the steering shaft;
A slip ring interposed between the steering shaft and the key lock member;
The key lock member is formed by bulging a part of the outer periphery of the pipe-shaped member outwardly, and a key engagement hole that allows the key to be engaged is formed in the bulge portion. A steering lock device , wherein a slope is formed in a circumferential direction from the key engagement hole on the outer peripheral surface of the pipe-shaped member . The steering lock device according to claim 1, wherein the sliding ring starts to slide with a torque of 100 N · m or more.

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