JP2003175830A - Tilt type steering device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a bolt of a steering column from being sheared. <P>SOLUTION: A recessed part 23 of a fixing gear 8 is fitted around a projecting part 22 of a fitting part 21 of a support bracket 7. Even if an excessive column upward load is applied to the steering wheel (omitting the illustration) in collision of a vehicle, this constitution can sufficiently receive the upward load by the fitting part between the projecting part 22 and the recessed part 23 and prevent two bolts 9a and 9b from being sheared caused by the insufficient strength of the bolts 9a and 9b. <P>COPYRIGHT: (C)2003,JPO

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tilt type steering device capable of adjusting a tilt angle of a steering wheel of a vehicle, and more particularly, to a fixed gear for tilt tightening and a movable gear. The present invention relates to a tilt-type steering device that can easily and accurately adjust the degree of parallelism of both meshing teeth of a gear. 2. Description of the Related Art There is known a tilt type steering apparatus which can adjust a tilt angle of a steering wheel according to a driver's physique and driving posture. In this tilt type steering apparatus, for example,
As disclosed in the above publication, a rear steering column is swingably connected to a rear portion of the front steering column via a support bracket fixed to a vehicle body. [0003] By swinging a tilt lever pivotally supported by the rear steering column, a movable gear provided on a support bracket is swung with respect to a fixed gear provided on the rear steering column, thereby meshing the movable gear. The teeth are engaged with the meshing teeth of the fixed gear to tighten the tilt, or the engagement is released to release the tilt. [0004] The above-mentioned actual fair 2-341
In the tilt type steering device disclosed in Japanese Patent Publication No. 45,
The movable gear and the fixed gear described above each have meshing teeth arranged in parallel, and are configured to mesh with each other. The movable gear is pivotally supported by a pivot so that it is movable. The fixed gear meshing with the gear is fixed to the rear steering column by welding. [0005] However, if the fixed gear is firmly fixed by this welding, it is difficult to adjust the parallelism between the meshing teeth of the movable gear and the meshing teeth of the fixed gear. If the parallelism is deviated, the two meshing teeth cannot be reliably meshed with each other, and there is a possibility that rattling may occur during tilt tightening. In order to eliminate the possibility that the parallelism between the two meshing teeth may be shifted, the fixing gear may be fixed by bolts and nuts. In this case, with the movable gear and the fixed gear meshed with each other, the bolts and nuts are tightened to adjust the position of the fixed gear so that the parallelism of both meshing teeth can be accurately obtained. However, the fact that the position of the fixed gear can be adjusted by the bolts and nuts as described above means that, on the other hand, there is a gap around the bolt only for the adjustment allowance (gap in the longitudinal direction of the vehicle). Become. Therefore, when the position of the fixed gear is adjusted by the amount of the adjustment allowance, the steering wheel is also displaced (in the vertical direction of the vehicle) by the amount of the adjustment allowance. However, the displacement of the steering wheel may be increased accordingly. Further, when the position of the fixed gear is adjusted by bolts and nuts, when an impact load is applied to the steering wheel, or when the driver puts weight on the steering wheel and hangs, the impact load or There is a possibility that the weight exceeds the tightening force of the bolts and nuts, and the position of the fixed gear shifts by the amount of adjustment. Further, when a vehicle collides, an excessive column upper load acts on the steering wheel, and the upper load is normally received by two bolts, but if the two bolts are used, the strength is insufficient. Therefore, there is a fear that the bolt is sheared. SUMMARY OF THE INVENTION The present invention has been made in view of the above-described circumstances, and has a structure in which a fixed gear or a movable gear is rotated to adjust the parallelism of both meshing teeth.
This parallelism adjustment can be easily and accurately performed, and even if there is an excessive input to the steering wheel, the displacement between the two gears can be reduced as much as possible. An object of the present invention is to provide a tilt-type steering device that can be sufficiently received. In order to achieve the above object, a tilt type steering apparatus according to the present invention comprises a rear steering column provided at a rear portion of a front steering column via a support bracket fixed to a vehicle body. And the tilt lever is swung to swing a movable gear provided on the other of the support bracket or the rear steering column with respect to a fixed gear provided on one of the support bracket or the rear steering column. In a tilt type steering device in which a meshing tooth of a movable gear is engaged with or disengaged from a meshing tooth of a fixed gear, the fixed gear or the movable gear is unevenly fitted to a support bracket or a rear steering column. Thus, the fixed gear or the movable gear is rotated to adjust the parallelism of the both meshing teeth. As described above, according to the present invention, the fixed gear or the movable gear is unevenly fitted to the support bracket or the rear steering column. The parallelism of the teeth can be adjusted. Therefore, unlike the related art, there is no need to provide a clearance for adjustment in the front-rear direction of the vehicle, and it is possible to easily and accurately adjust the parallelism of both meshing teeth without affecting the displacement of the steering wheel. it can. In addition,
Since the gap at the portion where the concave and convex portions are fitted can be set small, the positional deviation can be suppressed to a very small value. Further, even if the steering wheel has an excessive input and exceeds the tightening force of the bolt as in the prior art, the unevenly fitted portion is provided, so that the positional deviation between the two gears can be suppressed to an extremely small value. Can be. Further, even when an excessive column upper load is applied to the steering wheel at the time of a vehicle collision, the upper load can be sufficiently received by the portion fitted with the concave and convex, and the strength of the bolt is reduced as in the prior art. There is no danger of the bolt being sheared due to insufficient strength. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a tilt type steering apparatus according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a longitudinal sectional view of a tilt type steering apparatus according to a first embodiment of the present invention, and FIG. 2 is a bottom view of the tilt type steering apparatus shown in FIG. 1 as viewed from below. . The steering shaft is divided into a front steering shaft 1 and a rear steering shaft 2 and connected by a universal joint 3. The front steering shaft 1 is rotatably housed in a front steering column 4, and the rear steering shaft 2 is
It is rotatably housed in a rear steering column 5 by a ball bearing 6. A rear steering column 5 is swingably connected to a rear portion of the front steering column 4 via a support bracket 7 fixed to a vehicle body. The rear steering column 5 has a pivot 14 provided on a side surface thereof.
(FIG. 2). On the lower surface of the support bracket 7, a fixed gear 8 having meshing teeth 8a is fixed by bolts 9a and 9b. A movable gear 10 having meshing teeth 10a meshing with the meshing teeth 8a is pivotally supported on a movable gear pivot 11 provided on the rear steering column 5, and the movable gear 10 has a tilt described later. A pin 12 is provided for engaging the lever 15. A tilt lever 15 is provided on the side surface of the rear steering column 5 so as to be swingable. The tilt lever 15 is attached to the front of the vehicle (ie, clockwise). A tension spring 17 (FIG. 2) for biasing is provided. As shown in FIG. 2, a support spring 18 (compression spring) is interposed between the bracket 19 of the rear steering column 5 and the support spring bracket 20 of the support bracket 7. Thus, when the engagement between the meshing teeth 10a of the movable gear 10 and the meshing teeth 8a of the fixed gear 8 is released, the lowering of the steering wheel and the like is prevented. When the tilt angle of the steering wheel is adjusted by the tilt type steering apparatus constructed as described above, the tilt lever 15 is moved rearward of the vehicle (ie, FIG. 1) against the urging force of the tension spring 17. (In the counterclockwise direction), the tilt lever 15
The movable gear 10 swings around the movable gear pivot 11 so that the meshing teeth 10 a of the movable gear 10 are disengaged from the meshing teeth 8 a of the fixed gear 8.
Thereby, the inclination angle of the steering wheel (not shown) fixed to the rear end of the rear steering shaft 2 can be adjusted. After the tilt angle of the steering wheel is adjusted, when the tilt lever 15 is swung forward (ie, clockwise in FIG. 1) of the vehicle by the urging force of the tension spring 17, the tilt lever 15 is movable. The pin 12 of the gear 10 is pushed upward, the movable gear 10 swings around the movable gear pivot 11, and the meshing teeth 10 a of the movable gear 10 engage with the meshing teeth 8 a of the fixed gear 8. Thereby, the steering wheel (not shown) can be fixed in a state after the adjustment. Further, in the present embodiment, the mounting portion 21 provided on the lower surface of the support bracket 7 is provided with a projection 22 by embossing, and the fixed gear 8 is provided with the projection 2
1 is provided with a concave portion 23 to be fitted. The projection 22 is, for example, cylindrical.
The recess 23 is a cylindrical hole that fits therein. However, in this case, the concave portion 23 may be a long groove extending in the lateral direction of the vehicle as shown by a broken line in FIG. In such a configuration, when the fixed gear 8 is fixed to the support bracket 7, the concave portion 23 of the fixed gear 8 is fitted to the convex portion 22 of the mounting portion 21 of the support bracket 7 and temporarily placed. . Next, the meshing teeth 8a of the fixed gear 8
Then, the meshing teeth 10a of the movable gear 10 are meshed. When the two meshing teeth 8a and 10a mesh with each other, the concave portion 23 of the fixed gear 8 rotates with respect to the convex portion 22 of the mounting portion 21 to adjust the parallelism of the two meshing teeth 8a and 10a. Is done. After completing the adjustment of the parallelism, the bolt 9
The fixed gear 8 is firmly fixed by tightening a and 9b. As described above, in the present embodiment, the concave portion 23 of the fixed gear 8 is fitted to the convex portion 22 of the mounting portion 21 of the support bracket 7, whereby the fixed gear 8 is rotated to engage the two gears. The parallelism of the teeth 8a and 10a can be adjusted. Therefore, unlike the related art, there is no need to provide a clearance for adjustment in the front-rear direction of the vehicle, without affecting the displacement of the steering wheel (not shown).
Adjustment of the parallelism of both meshing teeth 8a and 10a can be easily and accurately performed. Since the gap at the portion where the convex portion 22 and the concave portion 23 are fitted can be set small, the positional deviation can be suppressed to a very small value. Further, a steering wheel (not shown)
Even if the input force is excessive and the tightening force of the bolts 9a and 9b is exceeded as in the related art, the position where the convex portion 22 and the concave portion 23 are fitted is provided. It can be kept low. Further, even when an excessive column upper load is applied to a steering wheel (not shown) at the time of a vehicle collision, the upper load can be sufficiently received by the portion where the convex portion 22 and the concave portion 23 are fitted. The strength of the two bolts 9a and 9b is insufficient and the bolt 9
There is no fear that a and 9b are sheared. Next, a tilt type steering apparatus according to a second embodiment of the present invention will be described with reference to FIG. FIG. 3 is a longitudinal sectional view of a tilt type steering device according to a second embodiment of the present invention. In the second embodiment, the support bracket 7
Are formed by die casting, and the projections 22 are simultaneously formed by die casting. Also in this case, similarly to the first embodiment, the concave portion 23 of the fixed gear 8 is fitted to the convex portion 22 of the mounting portion 21 of the support bracket 7, and
As a result, the fixed gear 8 is turned to rotate the two meshing teeth 8a, 10a.
Since the parallelism of a can be adjusted, the parallelism of the two meshing teeth 8a and 10a can be easily and accurately adjusted. Next, a tilt type steering apparatus according to a third embodiment of the present invention will be described with reference to FIG. FIG. 4 is a longitudinal sectional view of a tilt type steering device according to a third embodiment of the present invention. In the third embodiment, the support bracket 7
The mounting portion 21 has a convex portion 22 made of a pin member, and the fixed gear 8 has a concave portion 23. Also in this case, similarly to the first and second embodiments, the convex portion 22 of the mounting portion 21 of the support bracket 7 is provided with the concave portion 23 of the fixed gear 8.
The fixed gear 8 is rotated to adjust the parallelism of the two meshing teeth 8a and 10a, so that the parallelism of the two meshing teeth 8a and 10a can be easily and accurately adjusted. It can be carried out. In the present embodiment, the tilt lever 1
5 is provided with a lock member 26 which is movable in the front-rear direction in conjunction with the wedge portion 26, which is interposed between the movable gear 10 and the fixed member 27.
a is formed. As a result, when the tilt lever 15 swings, the lock member 26 moves in the forward direction of the vehicle, and the wedge portion 26a raises the movable gear 10 upward, and the fixed gear 8
The movable gear 10 is fixed to the fixed member 27.
It is designed to lock between. Next, a tilt type steering apparatus according to a fourth embodiment of the present invention will be described with reference to FIG. FIG. 5 is a longitudinal sectional view of a tilt type steering device according to a fourth embodiment of the present invention. In the fourth embodiment, unlike the first to third embodiments, the mounting portion 21 of the support bracket 7
A recess 24 is provided, and a projection 25 is provided on the fixed gear 8. Also in this case, the mounting portion 21 of the support bracket 7
The concave portion 24 of the fixed gear 8 is fitted into the concave portion 24, thereby rotating the fixed gear 8 to adjust the parallelism of the both meshing teeth 8a and 10a. ,
The adjustment of the parallelism of 10a can be easily and accurately performed. Next, a tilt type steering apparatus according to a fifth embodiment of the present invention will be described with reference to FIGS. FIG. 6 is a vertical sectional view of a tilt type steering apparatus according to a fifth embodiment of the present invention, and FIG. 7 is a sectional view taken along line VII-VII of FIG. In the fifth embodiment, a bracket 3 for the movable gear 10 is provided below the rear steering column 5.
1 is attached by bolts 34a and 34b, and a pair of flanges 31a and 31b of the bracket 31
A movable gear pivot 11 for swingably supporting the movable gear 10 is provided. A pin member press-fitted and fixed to the bracket 31 is configured as a convex portion 32, and a concave portion 33 is provided below the rear steering column 5. On the other hand, the fixed gear 8 is fixed to the mounting portion 21 of the support bracket 7 by casting or welding. However, the fixed gear 8 may directly process the meshing teeth 8 a at the position of the mounting portion 21. In such a configuration, when the movable gear 10 is fixed to the rear steering column 5, the convex portion 32 of the bracket 31 of the movable gear 10 is fitted into the concave portion 33 of the rear steering column 5 and temporarily placed. I do. Then
The meshing teeth 10a of the movable gear 10 are attached to the meshing teeth 8a of the fixed gear 8.
a is engaged. In a state where the two meshing teeth 8a, 10a are fitted, the convex portion 32 of the bracket 31 of the movable gear 10 is rotated with respect to the concave portion 33 of the rear steering column 5, and the two meshing teeth 8a, 10a are rotated. Adjust the parallelism of. After completing the adjustment of the parallelism, the bolts 34a and 34b are tightened to firmly fix the bracket 31 of the movable gear 10. As described above, also in the present embodiment, the bracket 31 of the movable gear 10 is turned to rotate the two meshing teeth 8a, 10a.
The parallelism can be adjusted, so that there is no need to provide a clearance for adjustment in the front-rear direction of the vehicle as in the prior art, and without affecting the displacement of the steering wheel (not shown), The parallelism of the teeth 8a and 10a can be easily and accurately adjusted. Further, a steering wheel (not shown)
Has excessive input, and the bolts 34a, 34
Even if b is slightly loosened, since the portion where the convex portion 32 and the concave portion 33 are fitted is provided, the displacement of the movable gear 10 can be suppressed to an extremely small amount. Further, even when an excessive column upper load acts on a steering wheel (not shown) at the time of a vehicle collision, the upper load can be sufficiently received by the portion where the convex portion 32 and the concave portion 33 are fitted. There is no danger that the bolt will be sheared as in the prior art. The present invention is not limited to the above-described embodiment, but can be variously modified. For example, in the above embodiment, the movable gear is pivotally supported on the rear steering column, and the fixed gear is mounted on the support bracket. However, the movable gear is pivotally supported on the support bracket, and the fixed gear is mounted on the rear steering column. An attached structure may be used. As described above, according to the present invention,
The fixed gear or the movable gear is fitted to the support bracket or the rear steering column in a concave and convex manner, whereby the fixed gear or the movable gear can be rotated to adjust the parallelism of the both meshing teeth. Therefore, unlike the related art, there is no need to provide a clearance for adjustment in the front-rear direction of the vehicle, and it is possible to easily and accurately adjust the parallelism of the both meshing teeth without affecting the displacement of the steering wheel. it can. Further, even if the steering wheel has an excessive input and exceeds the tightening force of the bolt as in the prior art, the unevenly fitted portion is provided, so that the positional deviation between the two gears is suppressed to an extremely small value. Can be. Further, even when an excessive column upper load is applied to the steering wheel at the time of a vehicle collision, the upper load can be sufficiently received by the portion fitted with the concave and convex, and the strength of the bolt is reduced as in the prior art. There is no danger of the bolt being sheared due to insufficient strength.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal sectional view of a tilt type steering device according to a first embodiment of the present invention. FIG. 2 is a bottom view of the tilt type steering device shown in FIG. 1 as viewed from below. FIG. 3 is a longitudinal sectional view of a tilt type steering device according to a second embodiment of the present invention. FIG. 4 is a longitudinal sectional view of a tilt type steering device according to a third embodiment of the present invention. FIG. 5 is a longitudinal sectional view of a tilt type steering device according to a fourth embodiment of the present invention. FIG. 6 is a longitudinal sectional view of a tilt type steering device according to a fifth embodiment of the present invention. FIG. 7 is a sectional view taken along the line VII-VII in FIG. 6; DESCRIPTION OF SYMBOLS 1 front steering shaft 2 rear steering shaft 3 universal joint 4 front steering column 5 rear steering column 6 ball bearing 7 support bracket 8 fixed gear 8a meshing teeth 9a, 9b bolt 10 movable gear 10a meshing tooth 11 movable Gear pivot 12 Pin 14 Axis 15 Tilt lever 17 Extension spring 18 Support spring 19 Bracket 20 Support spring bracket 21 Mounting part 22 Convex part 23 Concave part 24 Concave part 25 Convex part 31 Bracket 31a, 31b of movable gear Flange 32 Convex part 33 Concave part 34a, 34b bolt

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[Procedure amendment] [Submission date] January 9, 2003 (2003.1.9) [Procedure amendment 1] [Document name to be amended] Description [Item name to be amended] Full text [Amendment method] Change [Amendment] Description: [Document name] Description: [Title of the invention] Tilt-type steering device [Claims] [Claim 1] Swing the rear steering column to the rear of the front steering column via a support bracket fixed to the vehicle body. It is movably connected, the tilt lever is swung, and the movable gear provided on the other of the support bracket or the rear steering column is swung with respect to the fixed gear provided on one of the support bracket or the rear steering column to be movable. In a tilt type steering device for engaging or disengaging a meshing tooth of a gear with a meshing tooth of a fixed gear, the concave portion or the convex portion provided on the fixed gear or the movable gear is Tilt type steering device, characterized in that fitted to the projections or recesses provided in the lifting bracket or rear steering column. Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tilt type steering device capable of adjusting a tilt angle of a steering wheel of a vehicle. 2. Description of the Related Art There is known a tilt type steering apparatus which can adjust a tilt angle of a steering wheel according to a driver's physique and driving posture. In this tilt type steering device, for example, as disclosed in Patent Document 1, a rear steering column is swingably connected to a rear portion of a front steering column via a support bracket fixed to a vehicle body. [0003] By swinging a tilt lever pivotally supported by the rear steering column, a movable gear provided on a support bracket is swung with respect to a fixed gear provided on the rear steering column, thereby meshing the movable gear. The teeth are engaged with the meshing teeth of the fixed gear to tighten the tilt, or the engagement is released to release the tilt. [0004] Patent Document 1: Japanese Utility Model Publication No. 2-34145 [0005] In the tilt type steering apparatus disclosed in Patent Document 1, when the vehicle collides, the steering wheel is excessively large. When a column upper load is applied, the bolts that receive the load have insufficient strength,
There is a risk that the bolt will be sheared. SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to provide a tilt-type steering device that can prevent shearing of a bolt of a steering column. To achieve the above object, a tilt type steering apparatus according to the present invention comprises a rear steering column provided at a rear portion of a front steering column via a support bracket fixed to a vehicle body. And the tilt lever is swung to swing a movable gear provided on the other of the support bracket or the rear steering column with respect to a fixed gear provided on one of the support bracket or the rear steering column. A tilt type steering device for engaging or disengaging a meshing tooth of a movable gear with a meshing tooth of a fixed gear, wherein the concave portion or the convex portion provided on the fixed gear or the movable gear is provided with the support bracket or the rear steering column. Characterized in that it is fitted to the convex portion or the concave portion provided in. As described above, according to the present invention, the concave portion or the convex portion provided on the fixed gear or the movable gear is fitted to the convex portion or the concave portion provided on the support bracket or the rear steering column. Thus, even if an excessive column upper load acts on the steering wheel during a vehicle collision,
This upper load can be sufficiently received by the portion fitted with the concave and convex, and there is no fear that the bolt is insufficient in strength and the bolt is sheared as in the related art. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a tilt type steering apparatus according to an embodiment of the present invention will be described with reference to the drawings. (First Embodiment) FIG. 1 shows a first embodiment of the present invention.
FIG. 2 is a vertical sectional view of the tilt-type steering device according to the embodiment, and FIG. 2 is a bottom view of the tilt-type steering device shown in FIG. 1 as viewed from below. The steering shaft is divided into a front steering shaft 1 and a rear steering shaft 2 and connected by a universal joint 3. The front steering shaft 1 is rotatably housed in a front steering column 4, and the rear steering shaft 2 is
It is rotatably housed in a rear steering column 5 by a ball bearing 6. A rear steering column 5 is swingably connected to a rear portion of the front steering column 4 via a support bracket 7 fixed to a vehicle body. The rear steering column 5 has a pivot 14 provided on a side surface thereof.
(FIG. 2). On the lower surface of the support bracket 7, a fixed gear 8 having meshing teeth 8a is fixed by bolts 9a and 9b. A movable gear 10 having meshing teeth 10a meshing with the meshing teeth 8a is pivotally supported on a movable gear pivot 11 provided on the rear steering column 5, and the movable gear 10 has a tilt described later. A pin 12 is provided for engaging the lever 15. On the side surface of the rear steering column 5, a tilt lever 15 is swingably provided. The tilt lever 15 is attached to the front of the vehicle (ie, clockwise). A tension spring 17 (FIG. 2) for biasing is provided. As shown in FIG. 2, a support spring 18 (compression spring) is interposed between the bracket 19 of the rear steering column 5 and the support spring bracket 20 of the support bracket 7. Thus, when the engagement between the meshing teeth 10a of the movable gear 10 and the meshing teeth 8a of the fixed gear 8 is released, the lowering of the steering wheel and the like is prevented. When the tilting angle of the steering wheel is adjusted by the tilt type steering apparatus constructed as described above, the tilt lever 15 is moved rearward of the vehicle (ie, FIG. 1) against the urging force of the tension spring 17. (In the counterclockwise direction), the tilt lever 15
The movable gear 10 swings around the movable gear pivot 11 so that the meshing teeth 10 a of the movable gear 10 are disengaged from the meshing teeth 8 a of the fixed gear 8.
Thereby, the inclination angle of the steering wheel (not shown) fixed to the rear end of the rear steering shaft 2 can be adjusted. After the tilt angle of the steering wheel is adjusted, when the tilt lever 15 is swung forward (ie, clockwise in FIG. 1) of the vehicle by the urging force of the tension spring 17, the tilt lever 15 is movable. The pin 12 of the gear 10 is pushed upward, the movable gear 10 swings around the movable gear pivot 11, and the meshing teeth 10 a of the movable gear 10 engage with the meshing teeth 8 a of the fixed gear 8. Thereby, the steering wheel (not shown) can be fixed in a state after the adjustment. Further, in the present embodiment, the mounting portion 21 provided on the lower surface of the support bracket 7 is provided with a projection 22 by embossing, and the fixed gear 8 is provided with the projection 2
1 is provided with a concave portion 23 to be fitted. The projection 22 is, for example, cylindrical.
The recess 23 is a cylindrical hole that fits therein. However, in this case, the concave portion 23 may be a long groove extending in the lateral direction of the vehicle as shown by a broken line in FIG. In such a configuration, when the fixed gear 8 is fixed to the support bracket 7, the concave portion 23 of the fixed gear 8 is fitted to the convex portion 22 of the mounting portion 21 of the support bracket 7 and temporarily placed. . Next, the meshing teeth 8a of the fixed gear 8
Then, the meshing teeth 10a of the movable gear 10 are meshed. When the two meshing teeth 8a and 10a mesh with each other, the concave portion 23 of the fixed gear 8 rotates with respect to the convex portion 22 of the mounting portion 21 to adjust the parallelism of the two meshing teeth 8a and 10a. Is done. After completing the adjustment of the parallelism, the bolt 9
The fixed gear 8 is firmly fixed by tightening a and 9b. As described above, in the present embodiment, the concave portion 23 of the fixed gear 8 is fitted into the convex portion 22 of the mounting portion 21 of the support bracket 7, whereby the fixed gear 8 is rotated to engage with both The parallelism of the teeth 8a and 10a can be adjusted. Therefore, unlike the related art, there is no need to provide a clearance for adjustment in the front-rear direction of the vehicle, without affecting the displacement of the steering wheel (not shown).
Adjustment of the parallelism of both meshing teeth 8a and 10a can be easily and accurately performed. Since the gap at the portion where the convex portion 22 and the concave portion 23 are fitted can be set small, the positional deviation can be suppressed to a very small value. Further, a steering wheel (not shown)
Even if the input force is excessive and the tightening force of the bolts 9a and 9b is exceeded as in the related art, the position where the convex portion 22 and the concave portion 23 are fitted is provided. It can be kept low. Further, even when an excessive column upper load acts on a steering wheel (not shown) at the time of a vehicle collision, the upper load is sufficiently received by the portion where the convex portion 22 and the concave portion 23 are fitted. As in the conventional case, there is no fear that the strength of the two bolts 9a, 9b is insufficient and the bolts 9a, 9b are sheared. (Second Embodiment) Next, a tilt type steering apparatus according to a second embodiment of the present invention will be described with reference to FIG. FIG. 3 is a longitudinal sectional view of a tilt type steering device according to a second embodiment of the present invention. In the second embodiment, the support bracket 7
Are formed by die casting, and the projections 22 are simultaneously formed by die casting. Also in this case, similarly to the first embodiment, the concave portion 23 of the fixed gear 8 is fitted to the convex portion 22 of the mounting portion 21 of the support bracket 7, and
As a result, the fixed gear 8 is turned to rotate the two meshing teeth 8a, 10a.
Since the parallelism of a can be adjusted, the parallelism of the two meshing teeth 8a and 10a can be easily and accurately adjusted. Furthermore, even when an excessive column upper load is applied to a steering wheel (not shown) at the time of a vehicle collision, the upper load is sufficiently received by the portion where the convex portion 22 and the concave portion 23 are fitted. As in the conventional case, there is no fear that the strength of the two bolts 9a, 9b is insufficient and the bolts 9a, 9b are sheared. (Third Embodiment) Next, a tilt type steering apparatus according to a third embodiment of the present invention will be described with reference to FIG. FIG. 4 is a longitudinal sectional view of a tilt type steering device according to a third embodiment of the present invention. In the third embodiment, the support bracket 7
The mounting portion 21 has a convex portion 22 made of a pin member, and the fixed gear 8 has a concave portion 23. Also in this case, similarly to the first and second embodiments, the convex portion 22 of the mounting portion 21 of the support bracket 7 is provided with the concave portion 23 of the fixed gear 8.
The fixed gear 8 is rotated to adjust the parallelism of the two meshing teeth 8a and 10a, so that the parallelism of the two meshing teeth 8a and 10a can be easily and accurately adjusted. It can be carried out. Further, even when an excessive column upper load is applied to a steering wheel (not shown) at the time of a vehicle collision, the upper load is sufficiently received by the portion where the convex portion 22 and the concave portion 23 are fitted. As in the conventional case, there is no fear that the bolt 9a has insufficient strength and is sheared. In this embodiment, the tilt lever 1
5 is provided with a lock member 26 which is movable in the front-rear direction in conjunction with the wedge portion 26, which is interposed between the movable gear 10 and the fixed member 27.
a is formed. As a result, when the tilt lever 15 swings, the lock member 26 moves in the forward direction of the vehicle, and the wedge portion 26a raises the movable gear 10 upward, and the fixed gear 8
The movable gear 10 is fixed to the fixed member 27.
It is designed to lock between. (Fourth Embodiment) Next, a tilt type steering apparatus according to a fourth embodiment of the present invention will be described with reference to FIG. FIG. 5 is a longitudinal sectional view of a tilt type steering device according to a fourth embodiment of the present invention. In the fourth embodiment, unlike the first to third embodiments, the mounting portion 21 of the support bracket 7
A recess 24 is provided, and a projection 25 is provided on the fixed gear 8. Also in this case, the mounting portion 21 of the support bracket 7
The concave portion 24 of the fixed gear 8 is fitted into the concave portion 24, thereby rotating the fixed gear 8 to adjust the parallelism of the both meshing teeth 8a and 10a. ,
The adjustment of the parallelism of 10a can be easily and accurately performed. Further, even if an excessive column upper load acts on a steering wheel (not shown) at the time of a vehicle collision, the upper load is sufficiently received by the portion where the convex portion 25 and the concave portion 24 are fitted. As in the conventional case, there is no fear that the strength of the two bolts 9a, 9b is insufficient and the bolts 9a, 9b are sheared. (Fifth Embodiment) Next, FIGS.
A tilt-type steering device according to a fifth embodiment of the present invention will be described with reference to FIG. FIG. 6 is a vertical sectional view of a tilt type steering apparatus according to a fifth embodiment of the present invention, and FIG. 7 is a sectional view taken along line VII-VII of FIG. In the fifth embodiment, a bracket 3 for the movable gear 10 is provided below the rear steering column 5.
1 is attached by bolts 34a and 34b, and a pair of flanges 31a and 31b of the bracket 31
A movable gear pivot 11 for swingably supporting the movable gear 10 is provided. A pin member press-fitted and fixed to the bracket 31 is configured as a convex portion 32, and a concave portion 33 is provided below the rear steering column 5. On the other hand, the fixed gear 8 is fixed to the mounting portion 21 of the support bracket 7 by casting or welding. However, the fixed gear 8 may directly process the meshing teeth 8 a at the position of the mounting portion 21. In such a configuration, when the movable gear 10 is fixed to the rear steering column 5, the projection 32 of the bracket 31 of the movable gear 10 is fitted into the recess 33 of the rear steering column 5 and temporarily placed. I do. Then
The meshing teeth 10a of the movable gear 10 are attached to the meshing teeth 8a of the fixed gear 8.
a is engaged. In a state where the two meshing teeth 8a, 10a are fitted, the convex portion 32 of the bracket 31 of the movable gear 10 is rotated with respect to the concave portion 33 of the rear steering column 5, and the two meshing teeth 8a, 10a are rotated. Adjust the parallelism of. After completing the adjustment of the parallelism, the bolts 34a and 34b are tightened to firmly fix the bracket 31 of the movable gear 10. As described above, also in the present embodiment, the bracket 31 of the movable gear 10 is turned to rotate the two meshing teeth 8a, 10a.
The parallelism can be adjusted, so that there is no need to provide a clearance for adjustment in the front-rear direction of the vehicle as in the prior art, and without affecting the displacement of the steering wheel (not shown), The parallelism of the teeth 8a and 10a can be easily and accurately adjusted. Further, a steering wheel (not shown)
Has excessive input, and the bolts 34a, 34
Even if b is slightly loosened, since the portion where the convex portion 32 and the concave portion 33 are fitted is provided, the displacement of the movable gear 10 can be suppressed to an extremely small amount. Further, even when an excessive column upper load is applied to a steering wheel (not shown) at the time of a vehicle collision, the upper load can be sufficiently received by the portion where the convex portion 32 and the concave portion 33 are fitted. There is no danger that the bolt will be sheared as in the prior art. The present invention is not limited to the above-described embodiment, but can be variously modified. For example, in the above embodiment, the movable gear is pivotally supported by the rear steering column, and the fixed gear is mounted on the support bracket. However, the movable gear is pivotally supported by the support bracket, and the fixed gear is mounted on the rear steering column. An attached structure may be used. As described above, according to the present invention,
A concave portion or a convex portion provided on the fixed gear or the movable gear is fitted to a convex portion or a concave portion provided on the support bracket or the rear steering column. Thus, even when an excessive column upper load acts on the steering wheel at the time of a vehicle collision,
This upper load can be sufficiently received by the portion fitted with the concave and convex, and there is no fear that the bolt is insufficient in strength and the bolt is sheared as in the related art. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal sectional view of a tilt type steering device according to a first embodiment of the present invention. FIG. 2 is a bottom view of the tilt type steering device shown in FIG. 1 as viewed from below. FIG. 3 is a longitudinal sectional view of a tilt type steering device according to a second embodiment of the present invention. FIG. 4 is a longitudinal sectional view of a tilt type steering device according to a third embodiment of the present invention. FIG. 5 is a longitudinal sectional view of a tilt type steering device according to a fourth embodiment of the present invention. FIG. 6 is a longitudinal sectional view of a tilt type steering device according to a fifth embodiment of the present invention. FIG. 7 is a sectional view taken along the line VII-VII in FIG. 6; DESCRIPTION OF SYMBOLS 1 front steering shaft 2 rear steering shaft 3 universal joint 4 front steering column 5 rear steering column 6 ball bearing 7 support bracket 8 fixed gear 8a meshing teeth 9a, 9b bolt 10 movable gear 10a meshing tooth 11 movable Gear pivot 12 Pin 14 Axis 15 Tilt lever 17 Tension spring 18 Support spring 19 Bracket 20 Support spring bracket 21 Mounting part 22 Convex part 23 Concave part 24 Concave part 25 Convex part 31 Bracket 31a, 31b of movable gear Flange 32 Convex part 33 Concave part 34a, 34b bolt

Claims (1)

Claims: 1. A rear steering column is swingably connected to a rear portion of a front steering column via a support bracket fixed to a vehicle body, and a tilt lever is swung to support the rear steering column. The support bracket or the movable gear provided on the other side of the rear steering column is swung with respect to the fixed gear provided on one of the rear steering columns, and the meshing teeth of the movable gear engage with or engage with the meshing teeth of the fixed gear. In the tilt type steering device, the fixed gear or the movable gear is unevenly fitted to a support bracket or a rear steering column, and the fixed gear or the movable gear is rotated to increase the parallelism of the both meshing teeth. A tilt type steering device characterized in that it can be adjusted.