WO1995029833A1

WO1995029833A1 - Steering boss and spacer for securing a steering wheel

Info

Publication number: WO1995029833A1
Application number: PCT/JP1995/000855
Authority: WO
Inventors: Hisao Okaniwa; Shigenobu Katagiri
Original assignee: Yugen Kaisha Ok Kikaku
Priority date: 1994-04-28
Filing date: 1995-04-26
Publication date: 1995-11-09
Also published as: AU2353295A; JP3619889B2

Abstract

A steering boss (20) which enables a simple remplacement of a steering wheel, as well as an accurate and simple adjustment of an angle at which a steering wheel is mounted on a steering shaft, comprising a lower boss (21) provided with a fitting hole (214) to be fitted with a serrated portion (51) of a steering shaft (5) and a ring-like upper boss (22) placed on the lower boss (21). The upper boss (22) has wheel securing screw holes (221) and elongate holes (222) formed therein. When a boss connecting screw (28) is screwed into a boss securing screw hole (212) in the lower boss (21) through en elongate hole (222), the two bosses are fixed to each other. In addition, when the boss connecting screw (28) is unscrewed, the upper boss (22) can be rotated within a range of an angle at which an elongate hole is formed.

Description

Description Steering boss and steering wheel fixing spacers Technical field

The present invention relates to a steering boss for connecting a steering wheel to a steering shaft of an automobile and a spacer for fixing a steering wheel, and more particularly, to a steering shaft. The present invention relates to a mechanism for adjusting a mounting angle of a steering wheel to a vehicle.

Background art

In the automobile, the joint between the steering shaft and the steering wheel is provided with a fitting hole that engages with the 33-mountain serration formed at the upper end of the steering shaft. Steering bosses with pits are used. The steering boss is attached to the steering portion of the steering shaft with the spoke core of the steering wheel connected to the upper end surface in an integrated structure. Here, when replacing the existing steering wheel with something other than the existing one, and attaching the steering wheel and the steering boss to the steering shaft, the spokes of the steering wheel are inclined. In order to adjust the steering wheel or the off-center, adjust the mounting angle of the steering wheel to the serration part, that is, change the mountain alignment to adjust the mounting angle of the steering wheel.

However, with the conventional steering wheel mounting structure, it is necessary to adjust the mounting angle of the steering wheel after it has been installed—by connecting the body-structured steering wheel and the steering boss. After completely removing the steering shaft, it is necessary to adjust its angle, and then re-secure the steering boss and the steering wheel to the steering shaft. Therefore, there is a problem that it takes time to adjust the mounting angle of the steering wheel. Also, with the conventional steering wheel mounting structure, the number of peaks in the sash section is about 33, so the angle must be changed in units of about 11 °, and the angle must be changed in units of 11 °. There is a problem that angle adjustment of ° is impossible. Here, if the number of peaks is simply increased, a new problem arises in that the engagement between the selec- tion portions is reduced and the fitting strength is reduced.

In view of the above problems, an object of the present invention is to provide a steering boss and a steering wheel that can accurately and easily adjust the mounting angle of the steering wheel even when the steering wheel is replaced. To provide fixing spacers. Disclosure of the invention

In order to solve the above problems, in the present invention, a steering boss is composed of two or more members, and one of the members has a fitting hole that fits into a serration portion of a steering shaft. Configure and, on the other, screw the spoke core of the steering wheel. Furthermore, these components are connected by screws, and the angle of attachment of these components can be adjusted arbitrarily simply by loosening the screws.

That is, in the steunder boss according to the first embodiment of the present invention, a lower boss provided at a lower end portion with a fitting hole for a steering portion of a steering shaft is provided on the lower boss, and the upper boss is overlapped with the lower boss. Steering ring on the end A ring-shaped upper boss with a screw hole for fixing the wheel to fix the spoke core metal at multiple locations in the circumferential direction with a screw for fixing the wheel. A boss connection screw for screwing the upper to the lower boss is provided.The upper boss is formed with a slot extending in the circumferential direction at a portion where the boss connection screw penetrates. It is characterized by.

In this case, the upper boss is stacked on the upper portion of the lower boss, and in this state, the boss connecting screw is screwed from above the upper boss through the upper boss and into a screw hole formed in the upper end surface of the lower boss. This is preferred.

Also, the upper boss is placed on the outer periphery of the lower boss, and in this state, the boss connecting screw is passed through the upper boss from the side of the upper boss and screwed into the screw hole formed on the outer surface of the lower boss. You may.

Here, the upper boss may be used as a steering wheel fixing spacer for fixing the steering wheel to the lower boss.

In the steering boss according to the first embodiment of the present invention, even after the steering wheel is fixed, if the boss connecting screw is loosened, the upper boss is moved relative to the lower boss within the range in which the elongated hole is formed. Can be rotated. Therefore, even when the mounting angle of the steering wheel is readjusted, it is not necessary to remove the entire steering wheel and the steering boss. In addition, the mounting angle between the lower boss and the upper boss can be arbitrarily adjusted within the range in which the long hole is formed.

In the steering boss according to the second embodiment of the present invention, a lower boss having a fitting hole for a first serration portion of a steering shaft at a lower end portion, and a lower boss overlaid on the lower boss and provided on an upper end surface Is Steering Ring Hoi Ring-shaped upper boss with a screw hole for wheel fixing for screwing the spoke core metal of the wheel with a screw for fixing the wheel at multiple locations in the circumferential direction, and arranged inside the upper boss The boss fixing ring that can be fixed by pressing the upper boss toward the lower boss, and this boss fixing ring is screwed to the upper end surface of the lower boss at a plurality of circumferential locations. A boss connection screw for fixing the upper boss to the upper portion of the lower boss is provided through the boss, and a second serration portion is formed on the outer peripheral surface of the boss fixing ring. In addition, the upper boss is characterized in that a fitting portion is formed on the inner peripheral surface of the upper boss so as to fit with the second serration portion.

In the steering boss according to the second embodiment of the present invention, even after the steering wheel is fixed, if the boss connection screw is loosened, the boss fixing ring is loosened, so that the upper boss is rotated with respect to the lower boss. be able to. Therefore, even when the mounting angle of the steering wheel is readjusted, it is not necessary to remove the entire steering wheel and the steering boss. In addition, when adjusting the mounting angle of the steering wheel, the steering wheel can be arbitrarily readjusted with the second serration portion formed between the boss fixing ring and the upper boss.

In this case, the boss fixing ring was screwed to the lower boss by making the joint between the boss fixing ring and the upper boss a conical surface whose diameter decreases downward. In this case, it is preferable that the boss fixing ring presses the upper boss against the lower boss via the conical surface to fix the boss.

Further, in either of the first and second embodiments of the present invention, one of the upper boss and the lower boss has an idling protruding toward the other side at a joint portion of these bosses. A projection is provided for prevention. It is preferable that the boss on the other side has a concave portion extending in the circumferential direction at a position corresponding to the projection.

In the steering boss according to the third aspect of the present invention, there is provided a boss body having a fitting hole with a serration portion of a steering shaft at a lower end portion, and a screw movably arranged in a circumferential direction inside the boss body. A wheel fixing screw that penetrates the upper end of the boss body at a plurality of locations in the circumferential direction thereof and is screwed to the screw seat body to fix the spoke core metal of the steering wheel to the upper end of the boss body; The boss body is characterized in that a long hole extending in the circumferential direction is formed in a portion of the upper end portion through which the wheel fixing screw penetrates.

In the steering boss according to the third embodiment of the present invention, even after the steering wheel is fixed, the steering wheel can be rotated together with the screw seat simply by loosening the wheel fixing screw. The mounting angle of the wheel can be easily readjusted. In addition, the mounting angle between the lower boss and the upper boss can be arbitrarily adjusted within a range where the long hole is formed. BRIEF DESCRIPTION OF THE FIGURES

Figure 1 is a plan view of the steering wheel of a car.

FIG. 2 is a plan view conceptually showing the configuration of the steering boss according to the first embodiment of the present invention.

FIG. 3 is an exploded view showing the configuration of the upper boss in the steering boss shown in FIG.

Fig. 4 is a longitudinal sectional view conceptually showing the configuration of the steering boss shown in Fig. 2. Fig. 4 (a) is a sectional view taken along line C-C 'in Fig. 2, and Fig. 4 (b) is FIG. 3 is a cross-sectional view taken along the line DD ′ in FIG. FIG. 5 is a plan view showing a steering boss according to a modification of the first embodiment of the present invention, with a part thereof cut away.

FIG. 6 is a side view showing the upper end portion of the steering boss shown in FIG.

FIG. 7 (a) is an explanatory view showing a part of the upper end of the lower boss used for the steering boss shown in FIG. 5, and FIG. 7 (b) is a plan view of the upper boss.

FIG. 8 is a plan view conceptually showing a configuration of a connecting portion between the steering wheel and the steering shaft in the steering boss according to the second embodiment of the present invention.

FIG. 9 is a longitudinal sectional view conceptually showing a section taken along line AA ′ of the steering boss shown in FIG.

FIG. 10 is a longitudinal sectional view conceptually showing the structure of a steering boss according to a modification of the second embodiment of the present invention.

FIG. 11 is an explanatory diagram showing a configuration of a steering boss according to Embodiment 3 of the present invention.

FIG. 12 is a longitudinal sectional view conceptually showing the configuration of the steering boss shown in FIG.

FIG. 13 is an exploded view of a main part of a steering boss according to a modification of the third embodiment of the present invention.

FIG. 14 is a longitudinal sectional view conceptually showing a main part of the steering boss shown in FIG. BEST MODE FOR CARRYING OUT THE INVENTION

Example 1

Figure 1 is a plan view showing the configuration of the steering wheel of the vehicle, and Figure 2 is FIG. 3 is a plan view showing the configuration of the steering boss of this example, and FIG. 3 is an exploded view showing the configuration of the upper boss. Fig. 4 is a longitudinal sectional view conceptually showing the structure, Fig. 4 (a) is a sectional view taken along line C-C 'in Fig. 2, and Fig. 4 (b) is a sectional view taken along line D in Fig. 2. — The section taken along the line D ', 5 In Fig. 1, when the steering wheel 1 of the car is viewed from the driver's side with the horn cover removed, the annular rim 2 and the steering shaft are removed. And a spoke 3 connecting the steering boss 20 and the rim 2. The spokes 3 and the rim 2 are provided with an exterior made of a synthetic resin, and when the exterior is peeled off, the center side of the spoke core 4 exposed to the outside is connected to the steering boss 20.

2 to 4, a steering shaft 5 extends from the vehicle body toward the driver's seat. At the front end of the steering shaft 5, a serration portion 51 having about 33 peaks is formed.

_{The 1S} tip side is a screw shaft 52 having an external thread formed on the outer peripheral surface.

The steering boss 20 is provided with a lower boss 21 having a fitting hole 2 14 formed in the serration portion 51 of the steering shaft 5 and an upper portion of the lower boss 21. And upper bosses. Upper boss 2 2

Six wheel fixing screw holes 2 21 for fixing the spoke core metal 4 with the wheel fixing screws 27 are formed at equal angular intervals along the circumferential direction.

When the upper boss 22 and the lower boss 21 are fixed to each other, the steering boss 20 is directly fixed to the lower boss 21 by a boss connecting screw 28. That is, on the upper end surface of the lower boss 2 1, six screw holes 2 1 2 are formed at equal angular intervals in the circumferential direction. On the side of No. 2, six long holes 2 22 extending in the circumferential direction are formed at equal angular intervals along the circumferential direction at positions corresponding to the screw holes 2 12. The elongated holes 22 and the screw holes 22 1 for fixing the boil are alternately formed on the upper end surface of the upper boss 22 and are shifted by 30 °. Therefore, as shown in FIG. 4 (a), the boss connecting screw 28 is screwed into the screw hole 211 through the elongated hole 222 from the upper surface side of the upper boss 22. Upper boss 2 2 and lower boss 2 1 can be fixed. The upper boss 22 has a step 220 formed on the upper end surface, and the boss connecting screw 28 is located at a lower portion thereof. Therefore, the head of the boss connecting screw 28 does not protrude from the upper end surface of the upper boss 22.

A method of replacing the steering wheel 1 using the steering boss 20 having such a configuration is as follows. Before the replacement of the steering wheel 1, the steering boss 20 is disassembled into a lower boss 21 and an upper boss 22.

When replacing the steering wheel 1 from this state, first remove the existing steering wheel and steering boss that have been integrated with the vehicle.

Next, in order to fix the lower boss 21 to the steering shaft 5, the steering shaft 5 is passed through the fitting hole 2 14 of the lower boss 21, and then the nut 6 is screwed into the screw shaft 52. To wear.

Next, the upper boss 22 is placed on the upper end surface of the lower boss 21. At this time, the angle position of the upper boss 22 is adjusted based on the position of the screw hole 22 1 for fixing the wheel. In this state, the boss connecting screw 28 is inserted into the elongated hole 222 from the upper surface side of the fastener boss 22, and screwed into the boss connecting screw hole 212 of the lower boss 21.

Next, as shown in Fig. 4 (b), the upper boss 22 is steered. To attach the wheel 1, place the back side of the spoke core 4 on the upper end surface of the upper boss 2 2, and insert the wheel fixing screw 2 7 into the hole 4 1 from the surface of the spoke core 4. Then, screw the wheel fixing screw 27 into the wheel fixing screw hole 222. As a result, the steering wheel 1 is fixed to the steering shaft 5 via the upper boss 22 and the lower boss 21.

In this state, if the mounting angle of the steering wheel 1 is not correct, adjust it. In this adjustment, first remove the wheel fixing screw 27 and remove the steering wheel 1 from the upper boss 22. Next, when the boss connecting screw 28 is loosened, the upper boss 22 can be rotated by an arbitrary angle in the circumferential direction within the range in which the elongated hole 222 is formed.

In this way, after adjusting the mounting angle of the upper boss 22, tighten the boss connecting screw 28 again to completely fix the upper boss 22 to the lower boss 21. The wheel 1 is fixed to the upper boss 2 2 with the wheel fixing screw 2 7.

As described above, in this example, the steering wheel 1 is fixed to the upper boss 22 by tightening the wheel fixing screw 27 to the wheel fixing screw hole 2 21 of the upper boss 22. The replacement of the steering wheel 1 is easy.

In addition, since the boss connection screw 28 is screwed into the boss connection screw hole 2 12 through the elongated hole 2 22, the slot 2 22 is formed only by loosening the boss connection screw 28. The mounting angle of the upper boss 22 can be arbitrarily adjusted within the specified angle range. Therefore, since the readjustment of the mounting angle of the steering wheel 1 is accurate and easy, the replacement of the steering wheel 1 is easy. In this example, if a window 40a is formed at a position corresponding to the boss connection screw 28 as shown by a dotted line 40 in FIG. The boss connection screw 28 can be loosened without removing it from the upper boss 22. Therefore, the adjustment of the mounting angle of the steering wheel 1 is easier.

Also, as shown in FIG. 4 (a), at the joint surface between the upper boss 22 and the lower boss 21, a pin 122 for preventing idling is provided on the lower surface side of the upper boss 22 in the circumferential direction. At the same time, the lower boss 21 is provided at the upper end face with a recess 1 1 5 extending in the circumferential direction corresponding to the position of the pin 1 2 2 at the same angular interval along the circumferential direction. May be formed. Conversely, a pin for preventing idling may be provided on the upper surface side of the lower boss 21, while a long concave portion into which the pin for preventing idling may be formed on the lower end surface of the upper boss 22.

In addition, as shown in FIG. 2, in order to form an elongated hole 222 at the position shown by a dotted line 262 inside the steering boss 20, a dotted line 263 shown in FIG. As described above, the thickness of the side portions of the upper boss 22 and the lower boss 21 may be increased, and the boss connection screw holes 212 may be formed there. When the existing steering boss has the same structure as the lower boss 21, the upper boss 22 is used to fix the steering wheel 1 to the lower boss 21 (steering boss). It can be used as a spacer for fixing wheel.

Modification of Embodiment 1

Fig. 5 is a plan view of the steering boss of this example with a part cut away, Fig. 6 is a side view of the upper end portion, and Fig. 7 (a) is a plan view showing the structure of the upper boss. 7 (b) is an explanatory view showing a part of the upper end of the lower boss. In this example, the steering wheel ゃ steering wheel Since the configuration such as the shaft is the same as that of the first embodiment, the same reference numerals are given to the common parts, and detailed description thereof will be omitted. In the first embodiment, a structure is adopted in which the boss connecting screw is stopped from above while the upper boss is placed on the upper part of the lower boss.

5) A structure is adopted in which the boss connection screw is stopped from the side in this state, overlapping the outer periphery of the boss.

In FIGS. 5 and 6, the steering boss 60 of the present example has a lower boss 6 having a fitting hole (both not shown) formed with the serration portion 51 of the steering shaft 5 at the lower end. 1 and an upper boss 6 2 superposed on the outer peripheral portion near the upper end of the lower boss 6 1, ο. On the upper end surface of the upper boss 6 2, six wheel fixing screw holes 6 2 1 for fixing the spoke core 4 of the steering wheel 1 with the wheel fixing screws 6 7 are provided in the circumferential direction. They are formed at equal angular intervals along.

In the steering boss 60 of this example, when the upper boss 6 2 and the lower boss 61 are fixed, they are directly fixed by the boss connecting screws 68. That is, in the lower boss 6 1, thick portions 6 10 at six force points are formed at equal angular intervals along the circumferential direction, and the outer peripheral portion of each thick portion 6 10 is formed as shown in FIG. As shown in

20 holes 6 12 are formed. On the other hand, as shown in FIG. 7 (b), concave portions 6 25 on which the outer peripheral portion of the thick portion 6 10 of the lower boss 61 is located are formed at equal angular intervals on the inner peripheral surface of the upper boss 62. Each of the recesses 6 25 has an elongated hole 6 22 extending in the circumferential direction. Therefore, as shown in FIGS. 5 and 6, a long hole 62 2 is formed from the side of the upper boss 62.

The upper boss 6 2 and the lower boss 6 1 can be fixed by screwing the boss connecting screw 6 8 into the boss connecting screw hole 6 1 2 through It is.

The outer peripheral portion of the thick portion 610 of the lower boss 61 is located inside the recess 625 of the upper boss 62 as a projection for preventing idling.

The method of replacing the steering wheel 1 mounted on the vehicle using the steering boss 60 having such a configuration is substantially the same as that of the first embodiment, and thus will be briefly described.

First, after removing the existing steering wheel and boss, pass the serration portion 51 of the steering shaft 5 through the fitting hole of the lower boss 61, and nut it to the screw shaft 52. Screw 6 on.

Next, the upper boss 6 2 is superimposed on the outer peripheral portion of the lower boss 6 1. At this time, the angular position of the upper boss 62 is adjusted based on the position of the screw hole 62 1 for fixing the wheel. In this state, the boss connecting screw 68 is inserted into the elongated hole 622 from the side of the upper boss 62, and screwed into the boss connecting screw hole 612 of the lower boss 61.

Next, after the back surface of the spoke core 4 is overlapped with the upper end surface of the upper boss 6 2, the wheel fixing screw 6 7 is inserted from the surface of the spoke core 4 into the hole 41, and the wheel fixing screw 6 7 is inserted. Screw it into the wheel fixing screw hole 6 2 1. As a result, the steering wheel 1 is fixed to the steering shaft 5 via the upper boss 62 and the lower boss 61. In this state, if the mounting angle of the steering wheel 1 is shifted, first loosen the boss connecting screw 68. As a result, even if rather remove the A Ppabo scan 6 2 and Roabosu 6 1, this _c can and this rotating the A Ppabosu 6 2 in the circumferential direction within the long hole 6 2 2 is formed After adjusting the mounting angle of the upper boss 62, tighten the boss connection screw 68 again to lower the upper boss 62. Screw 6 1 completely.

As described above, in this example, the steering wheel 1 is easily fixed to the upper boss 62 by tightening the wheel fixing screw 67 to the wheel fixing screw hole 621 of the upper boss 62. This makes it easy to replace the steering wheel 1. In addition, since the boss connection screw 68 is screwed into the boss connection screw hole 612 through the long hole 622, the upper boss 6 Angle adjustment can be performed. Therefore, since the readjustment of the mounting angle of the steering wheel 1 is accurate and easy, the replacement of the steering wheel 1 is easy.

Example 2

FIG. 8 is a plan view conceptually showing a connecting portion between the steering wheel and the steering shaft in the steering boss of the present example, and FIG. 9 is a longitudinal sectional view of the same. In this example, since the configuration such as the steering wheel and the steering shaft is the same as that of the first embodiment, the same reference numerals are given to the common components, and the detailed description thereof will be omitted.

8 and 9, the steering boss 10 has a lower boss 11 having a circular outer shape connected to the steering shaft 5 side inside the exterior portion 10a and a spoke core 4 connected thereto. It comprises a ring-shaped upper boss 1 2 and a circular boss fixing ring 13 for fixing the upper boss 12 to the lower boss 11 inside the upper boss 12.

At the center of the lower boss 11 1, there is formed a concave portion 1 1 1 which opens upward, and on the outer peripheral side of this concave portion 1 1 1 there is formed a concave portion 1 2 which opens downward. ing. The recess 1 1 1 and the recess 1 1 2 communicate with each other through an opening (not shown) formed in the lower boss 11. The wiring from the horn is connected to the current collecting ring 9 through the opening. In the lower boss 11, the steering shaft of the steering shaft 5 is located at the center of the bottom 1 13 of the recess 1 1 1 1. A fitting hole 111 is formed to fit into the fitting portion 51 (first serration portion). On the inner peripheral surface of the fitting hole 114, irregularities are formed which match the irregularities of the first serration portion 51. The seating portion 51 of the steering shaft 5 fits into the fitting hole 1 14 of the lower boss 11, and in this state, the steering shaft 5 2 of the steering shaft 5 is fitted to the screw shaft 52 of the steering shaft 5. The nut 6 is screwed, so that the steering shaft 5 and the lower boss 11 are fixed.

On the upper end surface of the upper boss 12, 12 wheel fixing screw holes 121 are formed at equal angular intervals along the circumferential direction. On the other hand, six holes 41 are formed in the spoke core 4 at equal angular intervals along the circumferential direction. Therefore, with the spoke core 4 superimposed on the upper end surface of the upper boss 1 2, the wheel fixing screw 7 is inserted into the wheel fixing screw hole 1 2 1 from the upper surface side of the spoke core 4 through the hole 4 1. By screwing, spoke core metal 4 can be fixed to upper boss 12. Here, the head of the wheel fixing screw 7 is buried in the hole 41. When fixing the spoke cored bar 4 to the upper boss 12, the wheel fixing screws 7 are screwed into six of the 12 wheel fixing screw holes 12 1. The upper half of the inner peripheral surface of the upper boss 1 2 has a tapered surface 1 2 4 (conical surface shaped fitting portion) whose inner diameter decreases from the upper end to the lower end. The outer peripheral surface of the use ring 13 is a tapered surface 134 (conical serration portion) whose outer diameter decreases from the upper end to the lower end. The tapered surface 13 4 of the boss fixing ring 13 and the tapered surface 124 of the upper boss 12 are inclined at substantially the same angle.

Here, the tapered surface 13 4 of the boss fixing ring 13 has many threads. It is the Reservoir section 1 35 (the 2nd Reservoir section). On the other hand, the tapered surface 124 of the upper boss 12 is a fitting portion having irregularities formed to fit into the serration portion 135. In addition, three anti-idling pins 1 2 2 (5 anti-idling projections) protrude downward from the lower end surface of the upper boss 1 2, while the upper end of the lower boss 11 1 9 corresponds to the position of the pin 122 as shown by the arrow B--B 'in FIG. 9 and a part of the upper boss 12 and the boss fixing ring 13 shown in FIG. Thus, three elongated holes 115 extending in the circumferential direction are formed at equal angular intervals along the circumferential direction.

The to boss fixing ring 13 is formed with eight holes 131, which penetrate from the upper end surface to the lower end surface, at equal angular intervals in the circumferential direction. On the other hand, on the upper end surface of the lower boss 11, eight boss connecting screw holes 1 16 are formed at equal angular intervals along the circumferential direction, corresponding to the positions where the holes 13 1 are formed. The boss connection screw 8 is screwed into these boss connection screw holes 1 16 through the hole 13 1 from the top side of the boss fixing ring 13 to screw the boss. The ring 13 is designed to hold the upper boss 1 2 against the lower boss 11 and fix it. In this state, the head of the boss connecting screw 8 is buried in the hole 13 1.

How to use the steering boss 10 with such a configuration

The following is an example of replacing the 20 wheel 1. Prior to performing this work, the steering boss 10 has been disassembled into a lower boss 11, an upper boss 12, and a boss fixing ring 13.

When replacing the steering wheel 1 from this state, first remove the steering wheel and the boss that are integrated with the vehicle.

2 5 Remove.

Next, to fix the lower boss 1 1 to the steering shaft 5 Pass the steering shaft 5 through the fitting hole 1 14 of the lower boss 11 and screw the nut 6 to the screw shaft 52.

Next, in order to fix the upper boss 1 2 to the upper end surface of the lower boss 11 1, place the upper boss 1 2 on the upper end surface of the lower boss 1 1. Into the ring 13. At this time, the mounting angle of the upper boss 12 is adjusted with reference to the wheel fixing screw hole 122 formed in the upper boss.

Next, a boss connecting screw 8 is inserted from the hole 13 1 of the boss fixing ring 13, and this boss connecting screw 8 is screwed into the boss connecting screw hole 1 16 of the lower boss 11. At this time, when the boss connecting screw 8 is tightened, the boss fixing ring 13 sinks into the inside of the boss 1 2. The upper boss 1 2 is fixed to the lower boss 11. .

Next, in order to attach the steering wheel 1 to the upper boss 1 2, the back surface of the spoke core 4 is overlapped with the upper end surface of the upper boss 1 2, and then the mounting angle of the steering wheel 1 is adjusted. Align the position of the hole 4 1 of the spoke core 4 with the screw hole 1 2 1 for fixing the wheel. In this state, the wheel fixing screw 7 is inserted into the hole 41 from the upper surface of the spoke core 4, and the wheel fixing screw 7 is screwed into the wheel fixing screw hole 1 2 1. As a result, the steering wheel 1 is fixed to the steering shaft 5 via the upper boss 12 and the lower boss 11 _{c. In} this state, the mounting angle of the steering wheel 1 is checked. If not, readjust it. In this readjustment, first loosen the wheel fixing screw 7 and remove the steering wheel 1 from the upper boss 12. Next, loosen the boss connection screw 8 and lift the boss fixing ring 1 3, and the upper boss 1 2 becomes the lower boss 1

It is released from the state fixed to 1. Therefore, the steering boss Even if the entirety 10 is not removed, the mounting angle of the upper boss 12 can be adjusted by rotating the steering wheel 1 in the circumferential direction. After that, tighten the boss connection screw 8 to fix the upper boss 1 2 to the lower boss 1 1, and then fix the steering wheel 1 to the upper boss 1 2 with the wheel fixing 5 fixing screw 7 Then, the steering wheel 1 can be fixed while being adjusted to a predetermined mounting angle.

As described above, in this example, the steering wheel 1 is screwed into the wheel fixing screw hole 1 2 1 of the upper boss 12 from the front side of the spoke core 4 so that the steering wheel 1 is screwed. To boss 10 easily

₎ , The steering wheel 1 is easy to replace, and the boss connecting screw 8 is screwed into the boss connecting screw hole 1 16 of the lower boss 11. Since the upper boss 1 2 is fixed to the lower boss 11 by the boss fixing ring 13, the boss connecting ring 8 can be loosened and the boss fixing ring 13 can be lifted up. Even if is not removed, the upper boss 12 can be turned and the mounting angle can be adjusted at the ser- vice portion 135. In addition, when adjusting the mounting angle of the steering wheel 1, the steering wheel 1 35 formed between the boss fixing ring 13 and the upper boss 12 can be arbitrarily adjusted. I just need. Therefore, installation of steering wheel 1

20 Adjusting the angle is accurate and easy.

Further, in this example, while the pin 12 for preventing idling is formed on the upper boss 12, the long hole 1 15 is formed on the lower boss 11, so that the upper boss 12 is set within a predetermined angle range. The boss can be freely rotated, and the boss fixing ring 13 and the upper boss 13

Steering wheel 1 does not run idle even if the connection between tapered surface 1 2 4 (fitting portion) of 2 5 1 2 is loose. Here, on the side of the lower boss 1 1 While a projection is formed, a slot may be formed on the side of the upper boss 12, as shown by the dotted line 40 in FIG. 9 corresponding to the mounting position of the boss connection screw 8. If windows 40 a are formed in the cored bar 4, the boss connection nuts 5 and 8 can be loosened without removing the steering wheel 1 from the upper boss 12, so that the steering ring can be used. The wheel 1 can be rotated together with the upper boss 12 so that readjustment is easier, a modification of the second embodiment.

FIG. 10 is a longitudinal sectional view conceptually showing the structure of a steering boss according to a modification of the second embodiment. In this example, since the configuration of the steering wheel, the steering shaft, and the like is the same as that of the second embodiment, the same reference numerals are given to the common components, and detailed description thereof is omitted. I do. In FIG. 10, the steering boss 70 also has a lower boss 71 having a circular outer shape connected to the steering shaft 5 side and a ring-shaped upper boss 72 connected to the spoke core 4. And a circular boss fixing ring 73 fixing the upper boss 72 to the lower boss 71 on the is side of the upper boss 72.

In the lower boss 71, a fitting hole 111 is formed at a lower end portion thereof so as to be fitted to a serration portion 51 (first serration portion) of the steering shaft 5. . On the inner peripheral surface of the fitting hole 114, irregularities are formed that match the irregularities of the serration portion 5201.

The entire inner peripheral surface of the upper boss 72 is a tapered surface 724 (fitting portion) whose inner diameter decreases from the upper end to the lower end. On the other hand, the entire outer peripheral surface of the boss fixing ring 73 also has a tapered surface 734 whose outer diameter decreases from the upper end to the lower end. The 25 tapered surface 734 of the boss fixing ring 73 and the tapered surface 724 of the upper boss 72 are inclined at substantially the same angle. Here, the tapered surface 734 of the boss fixing ring 73 is a serration portion 735 (second serration portion) having irregularities. On the other hand, the tapered surface 724 of the upper boss 72 is a fitting portion having irregularities formed to fit into the serration portion 735.

5 The boss fixing ring 73 has eight holes 131, which penetrate from the upper end surface to the lower end surface thereof, at equal angular intervals along the circumferential direction. On the other hand, on the upper end surface of the lower boss 71, eight boss connection screw holes 716 are formed at equal angular intervals along the circumferential direction, corresponding to the positions where the holes 131 are formed. The boss connection screw 8 is screwed into the boss connection screw hole 7 16 through the hole 13 1 from the top side of the boss fixing and ο ring 7 3, thereby forming the boss connection screw hole. The fixing ring 73 can fix the upper boss 72 by pressing the upper boss 72 toward the mouth boss 71. Other structures are substantially the same as those of the steering boss according to the second embodiment.

Such use of the steering Li Ngubosu 7 0 configurations illustrating the replacement of the steering-ring _{1 5} wheel 1 as an example.

Even when using this steering boss 70, if you want to replace the existing steering wheel with another steering wheel 1, first use the steering wheel that has been integrated into the vehicle. After removing the wheel and boss, pass the steering shaft 5 through the fitting 20 mating hole 114 of the lower boss 71, and screw the nut 6 to the screw shaft 52.

Next, after the upper boss 7 2 is overlaid on the upper end surface of the lower boss 7 1, the boss fixing ring 1 3 is fitted inside the lower boss 11 1.

Next, insert the boss connection screw 8 from the hole 1 3 1 of the boss fixing ring 13, and insert this boss connection screw 8 into the boss connection screw hole 7 2 5 1 6 of the lower boss 7 1. Screw it. Here, when the boss connecting screw 8 is tightened, the boss fixing ring 73 sinks into the inside of the upper boss 72. Then, fix the upper boss 7 2 to the lower boss 7 1.

Next, the back side of the spoke core 4 is overlapped with the upper end surface of the boss 1 2 and the mounting angle of the steering wheel 1 is adjusted, and the hole 4 1 of the spoke core 4 and the screw hole 1 2 for wheel fixing are adjusted. Align with 1 In this state, the wheel fixing screw 7 is inserted into the hole 41 from the upper surface of the spoke core 4, and the wheel fixing screw 7 is screwed into the wheel fixing screw hole 1 21. As a result, the steering wheel 1 is fixed to the steering shaft 5 via the upper boss 12 and the lower boss 11. At this time, the upper boss 72 is slightly lifted upward, so that the fitting portion 72 4 of the upper boss 72 and the serration portion 735 of the boss fixing ring 73 are completely completed. Meet me.

Therefore, when the mounting angle is readjusted after the steering wheel 1 is fixed, simply loosening the wheel fixing screw 7 and the fitting part 7 2 4 of the upper boss 7 2 and the boss fixing The engagement with the serration 735 of the ring 733 is released. Therefore, even if the boss connection screw 8 is not loosened, the upper boss 72 (steering wheel 1) can be rotated in the circumferential direction to adjust the mounting angle. After that, tighten the wheel fixing screw 7 so that the fitting part 72 4 of the upper boss 72 and the serration part 735 of the boss fixing ring 73 are completely engaged. State.

As described above, in this example, it is possible to rotate the upper boss 1 2 only by loosening the wheel fixing screw 7 without loosening the boss connecting screw 8, so that the steering wheel 1 It is accurate and easy to adjust the mounting angle.

Example 3

Fig. 11 is an explanatory diagram showing the configuration of the steering boss of this example, and Fig. 12 is. It is a longitudinal cross-sectional view showing the configuration. In this example, the configuration of the steering wheel, steering shaft, etc. is the same as that of the first embodiment, so the common parts are denoted by the same reference numerals, and detailed description thereof will be omitted. In these figures, in the steering boss 30 of the present example, the spoke core 4 of the steering wheel 1 is fixed to the cylindrical boss body 32 and the lower end of the spoke core 4 is fixed to the lower end of the steering boss 30. The fitting hole 31 for the steering shaft 5 of the steering shaft 5 with the serration portion 51 is formed.

Six long holes 3 2 1 extending in the circumferential direction are formed on the upper end surface 3 20 of the boss body 3 2 at equal angular intervals along the circumferential direction, and the inner circumferential surface 3 of the boss body 3 2 is formed. Six screw seats 33 are arranged in the recess 3 23 formed in 22.

These screw seats 33 are movable in the circumferential direction inside the recesses 32 of the boss body 32. On the upper end face of the screw seat 33, a screw hole 331 for wheel fixing is formed one by one. The method of using the steering boss 30 having such a configuration to replace it with a steering wheel other than the one mounted on the vehicle is as follows.

First, after removing the steering wheel and the boss that have been integrated into the vehicle, the steering shaft 5 is passed through the fitting hole 31 of the boss body 32, and the screw shaft 52 Nut 6 is screwed on. Next, the back side of the spoke core 4 is overlapped with the upper end surface of the boss body 32, and a wheel fixing screw 37 is inserted into the hole 41 from the surface of the spoke core 4, and the wheel fixing screw 37 is inserted. Screw it into the screw hole 3 3 1 for fixing the wheel. As a result, the steering wheel 1 is fixed to the steering shaft 5 via the boss body 32 so that the upper part of the boss body 32 is sandwiched between the spoke core 4 and the screw seat 33. You. In this state, check the mounting angle of the steering wheel 1, and if it is incorrect, readjust it. In this re-adjustment, when the wheel fixing screw 37 is loosened, the steering wheel 1 has the long hole 3 2 1 even if the entire steering bolt 30 is not removed from the steering shaft 5. It can be rotated within the formed range. At this time, the screw seat 33 moves together with the wheel fixing screw 37 in the circumferential direction. Therefore, after adjusting the angle of the steering wheel 1, the wheel fixing screw 3 By tightening 7, the steering wheel 1 is fixed at the specified angular position.

As described above, in this example, the screw hole 3 3 1 is formed in the screw seat 3 3 built in the boss body 3 2, and the steering is performed only by tightening the wheel fixing screw 3 7. Since the structure is such that the wheel 1 is easily fixed to the boss body 3 2, the replacement of the steering wheel 1 is easy. Also, since the wheel fixing screw 37 is screwed into the wheel fixing screw hole 331 through the long hole 321 formed in the boss body 32, just loosen the wheel fixing screw 37. Thus, the angle of the steering wheel 1 can be adjusted, and there is no need to remove the boss body 32 from the steering shaft 5. Therefore, readjustment of the mounting angle of the steering wheel 1 is accurate and simple.

To provide 12 wheel fixing screw holes 331 at 30 ° intervals, the number of screw seats 3 3 and long holes 3 2 1 may be increased, but the long holes 3 2 1 are made longer. At the same time, two screw holes 331 for fixing the wheel may be formed at the upper end surface of the screw seat 33.

Modification of Embodiment 3

FIG. 13 is an explanatory view showing a configuration of a steering boss according to a modification of the third embodiment, and FIG. 14 is a longitudinal sectional view showing the configuration. In this example, Since the configuration such as the steering wheel and steering shaft is the same as that of the third embodiment, the same reference numerals are given to the common parts, and the detailed description thereof is omitted. However, in the third embodiment, a single boss body is used, and a plurality of screw seats are arranged inside the boss body.In this example, the five boss bodies are formed of two members, and the screw seat body is formed. It is composed of one piece.

That is, as shown in Fig. 13, in the steering boss 80 of this example. The boss body 82 has a recess 830 in which a ring-shaped screw seat body 85 corresponding to an upper boss can be stored. Lower boss 8 3 and above

> 0 The boss fixing ring 84 attached to the end.

Here, six holes 841 are formed in the boss fixing ring 84 at equal angular intervals along the circumferential direction, and the upper end surface of the lower boss 83 corresponds to the hole 841. Six boss connection screw holes 831 are formed at equal angular intervals. Therefore, after the screw seat is 85 is housed in the concave portion 83 of the lower boss 83, the boss fixing ring 84 is put on the upper end of the lower boss 83, and the boss connecting screw 86 is inserted into the hole 8. When screwed into the boss connection screw hole 831 through 41, the screw seat body 85 is held in a state in which it can move in the circumferential direction inside the boss body 82.

The screw seat 8 5 has six first wheel fixing screw holes 8 5 1 in a circle.

20 At equal angular intervals along the circumferential direction, around which six second wheel fixing screw holes 852 are formed at equal angular intervals along the circumferential direction. The first wheel fixing screw hole 851 and the second wheel fixing screw hole 852 are formed at positions shifted by 30 °. On the other hand, the boss fixing ring 84 constituting the upper end of the boss body 82 is attached to

2 5 At the position corresponding to the first wheel fixing screw hole 8 5 1 of the screw seat body 8 5. Six first long holes 8 4 2 extending in the circumferential direction are formed, around which Six second elongated holes 843 extending in the circumferential direction are formed at positions corresponding to the second wheel fixing screw holes 852.

In the screw seat 85, three pins 859 (protrusions) for preventing air rotation protrude downward from the lower end surface thereof at equal angular intervals, and correspond to predetermined positions in the concave portions 830. Has three elongated holes 839 extending in the circumferential direction. Other configurations are the same as those of the third embodiment.

In the steering boss 80 thus configured, as shown in FIG. 14, after the screw seat body 85 is housed in the recess 83 of the lower boss 83, the lower boss 83 and the tightening ring 84 are provided. Is fixed with boss connection screws 86. Next, as in the third embodiment, the seating portion 51 of the steering shaft 5 is passed through the fitting hole 31 formed at the lower end of the fitting shaft 31, and a nut is inserted into the screw shaft 52. Screw 6 on.

Next, the back surface of the spoke core 4 is overlapped with the upper end surface of the boss body 8 2 (the upper end surface of the boss fixing ring 84), and the wheel fixing screw 3 7 is inserted into the hole 4 1 from the surface of the spoke core 4. Then, screw the wheel fixing screw 37 into the first wheel fixing screw hole 851 through the first elongated hole 842. Here, if the hole 41 is formed slightly outside the spoke core 4, the wheel fixing screw 37 is inserted through the second long hole 843 to the second wheel fixing screw hole. 8 5 2 As a result, the boss fixing ring 84 of the boss body 3 2 is sandwiched between the spoke core 4 and the screw seat 85, and the steering wheel 1 moves the steering boss 80. Via the steering shaft 5.

In this state, check the mounting angle of the steering wheel 1, and if it is incorrect, readjust it. In this re-adjustment process, when the wheel fixing screw 37 is loosened, the steering wheel 1

Since it can be rotated in the range where 1 slot 8 4 2 is formed, It is not necessary to remove the steering boss 80 from the steering shaft 5. At this time, the screw seat 85 moves in the circumferential direction integrally with the wheel fixing screw 37. Therefore, after adjusting the angle of the steering wheel 1, tighten the wheel fixing screw 37 again, and the steering wheel

5 Wheel 1 is fixed at a predetermined angular position.

As described above, in this example, the first or second wheel fixing screw holes 851, 852 are formed in the screw seat body 85 incorporated in the boss body 32, and the wheel fixing screw is formed. By simply tightening 3 7, the steering wheel 1 is fixed to the boss body 8 2.

It is easy to replace the towing wheel 1. Also, the wheel fixing screw 37 passes through the first or second long hole 842, 843 formed at the upper end (boss fixing ring 84) of the boss body 82, and the first or second wheel is screwed. The second wheel fixing screw holes 8 5 1 and 8 5 2 are screwed, so simply loosening the wheel fixing screw 37 adjusts the steering wheel 1 angle.

, " be able to. Therefore, the readjustment of the mounting angle of the steering wheel 1 is accurate and simple. Industrial applicability

As described above, in the present invention, the steering boss is composed of two or more members, and one of the members is formed with a fitting hole that fits into the steering portion of the steering shaft. On the other, screw the spoke core of the steering wheel. Furthermore, it is characterized in that these members are connected by screws, and the angle of attachment of these members can be arbitrarily adjusted only by loosening the screws.

25 In other words, in the steering boss according to the first embodiment of the present invention, the upper boss is formed with a long hole extending in the circumferential direction. A screw hole into which a boss connection screw is screwed through the long hole is formed on the upper end surface of the lower boss corresponding to the formation position of the long hole. Therefore, even after the steering wheel is fixed, if the boss connection screw is loosened, the upper boss can be rotated with respect to the lower boss as long as the long hole is formed. Therefore, even when the mounting angle of the steering wheel is readjusted, it is not necessary to remove the entire steering wheel and the steering boss. In addition, the mounting angle between the lower boss and the upper boss can be arbitrarily adjusted within the range in which the long hole is formed.

In the steering boss according to the second embodiment of the present invention, the upper boss is fixed to the lower boss by screwing the boss fixing ring to the lower boss with the boss connecting screw. For this reason, even after the steering wheel is fixed, if the boss connecting screw is loosened, the boss fixing ring is loosened, so that the upper boss can be rotated with respect to the lower boss. Therefore, even when the mounting angle of the steering wheel is readjusted, it is not necessary to remove the entire steering wheel and the steering boss. In addition, when the mounting angle of the steering wheel is adjusted, it may be arbitrarily adjusted by the second serration portion formed between the boss fixing ring and the upper boss.

In addition, when a concave portion extending in the circumferential direction is formed with respect to the protrusion formed on the upper boss or the lower boss, the upper boss can be freely rotated within a range where the concave portion is formed. Furthermore, even if the bosses are loosely fixed, the steering wheel can be prevented from running idle.

In the steering boss according to the third aspect of the present invention, a wheel fixing screw is screwed into a screw hole of the screw seat body through an elongated hole of the boss body, and the steering is performed. The feature is to fix the ring wheel. Therefore, even after the steering wheel is fixed, the steering wheel can be rotated together with the screw seat simply by loosening the wheel fixing screw. Easy to readjust. In addition, the mounting angle between the lower boss and the upper boss can be arbitrarily adjusted within a range where the long hole is formed.

Claims

The scope of the claims

1. Lower boss with a fitting hole at the lower end for the steering section of the steering shaft, and a lower boss superimposed on the lower boss,

5 A ring-shaped upper boss with a wheel fixing screw hole for screwing the spoke core metal of the ring wheel at a plurality of positions in the circumferential direction with a wheel fixing screw, and the upper boss at a plurality of positions in the circumferential direction And a boss connecting screw for penetrating the upper boss and screwing the upper boss to the lower boss.

10. The steering boss, wherein the upper boss is provided with an elongated hole extending in a circumferential direction in a portion where the boss connecting screw penetrates.

2. In claim 1, the upper boss is overlaid on the lower boss 5 and the upper boss, and in this state, the boss connecting screw passes through the upper boss from above the upper boss. A steering boss, which is screwed into a screw hole formed on an upper end surface of the lower boss.

20. In Claim 1, the upper boss is superimposed on the outer peripheral portion of the lower boss, and in this state, the boss connecting screw connects the upper boss from the side of the upper boss. A steering boss which penetrates and is screwed into a screw hole formed on an outer surface of the lower boss.

twenty five

4. Make the fitting hole for the steering shaft with the serration part at the lower end. A steering wheel fixing spacer for fixing the steering wheel to the steering boss provided,

At the upper end surface, a screw hole for fixing a steering wheel with a screw for fixing the spoke core metal of the steering wheel at a plurality of circumferential positions with a wheel fixing screw, and a spacer for fixing the steering wheel are provided on the steering wheel. A screw for screwing to the upper end surface of the boss has an elongated hole extending in the circumferential direction at a portion penetrating at multiple locations in the circumferential direction for fixing a steering wheel. Spice.

5. Lower boss provided with a fitting hole for the first serration part of the steering shaft at the lower end, and a spoke core of the steering wheel superposed on the upper part of the lower boss. A ring-shaped upper boss provided with a wheel fixing screw hole for screwing the upper boss at a plurality of positions in the circumferential direction with a wheel fixing screw; and And a boss fixing ring that can be pressed and fixed, and the boss fixing ring is screwed to the upper end surface of the lower boss at a plurality of positions in the circumferential direction, and the upper boss is fixed via the boss fixing ring. A boss connection screw fixed to an upper portion of the lower boss,

The boss fixing ring has a second serration portion on an outer peripheral surface thereof,

The steering boss, wherein the upper boss has a fitting portion on an inner peripheral surface thereof, the fitting portion engaging with the second serration portion.

6. In Claim 5, the joint portion between the boss fixing ring and the upper boss has a conical surface whose diameter decreases downward. When the boss fixing ring is screwed to the lower boss by the boss connection screw, the upper boss is pressed and fixed to the lower boss via the conical surface. A steering boss that is capable of performing steering.

7. In claim 1, claim 2, claim 3, claim 5, or claim 6, one of the upper boss and the lower boss is a joint portion between these bosses. A steering boss, characterized in that the steering boss is provided with a projection for preventing idling protruding toward the other side in the above, and is provided on the other side with a concave portion extending in the circumferential direction at a position corresponding to the projection.

8. A boss body having a fitting hole with the serration portion of the steering shaft at the lower end, a screw seat body disposed inside the boss body so as to be movable in the circumferential direction, and the boss. And a wheel fixing screw that penetrates the upper end of the main body at a plurality of locations in the circumferential direction and is screwed to the screw seat body, and fixes a spoke core of the steering wheel to an upper end surface of the boss main body. Yes,

The steering boss, wherein the boss main body is provided with a circumferentially extending elongated hole at a portion where the wheel fixing screw penetrates.