JPS59230862A - Tilting steering gear - Google Patents

Abstract

PURPOSE:To make incorporating performance favorable, by arranging a rocking center of a bracket supporting a steering shaft and a turning center of a pin rocking the rocking center by connecting with the bracket on different positions from each other. CONSTITUTION:A rocking attachment 38 is fixed to an upper bracket 15 supporting a steering shaft and the rocking attachment 38 is fixed to a car body rockably centering around a tilting center O2. An oblong hole 38b is formed on the attachment 38 and a pin 28 provided on a gear of a speed reduction mechanism C is made to connect with the oblong hole 38b. The pin 28 is turned centering around a drive center O1 positioned differently from the foregoing tilting center O2 through a rotary driving source B. The upper bracket 15, therefore, is rocked within a range of a rocking angle alpha through this turning of the pin 28.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a dial 1 to a steering device in which the tilting angle of a steering wheel can be adjusted.

[Prior art]

This type of tilt steering device includes, for example, a device in which the tail and drive center coincide as in Utility Application No. 109562/1987 filed by the applicant; In some cases, the tilt center and drive center do not match, such as in Japanese Patent No. 57-198344.

In the former, since both centers are aligned, the rotary drive source and deceleration I structure are individually assembled and then attached to the breakaway bracket, which is a fixed member.
The problem was that it was difficult to assemble, and was inefficient in terms of assembly.

The device of the present invention is of a type in which the two centers do not coincide with each other, but in the latter device, a large load is applied to the deceleration mechanism section due to an external force applied from the steering wheel side, so it is inevitable that the deceleration mechanism section This had the disadvantage of reducing the space for the driver, since the large size did not require much space. Furthermore, the latter requires a link that protrudes toward the driver's knees and a protruding portion of the upper bracket, which narrows the space for the driver even for these reasons.

Furthermore, since the latter uses the above-mentioned link and has a structure with many pivot parts, there are many places where "backlash" occurs, and the structure tends to cause errors in the tilt operating angle. Although the configurations do not match, since the housing of the deceleration mechanism is not fixed to a fixed member using a tilt center, installation errors are likely to occur when installing the rotary drive source and deceleration mechanism. Therefore, there was a drawback that it was difficult to adjust the error in the tilt operating angle.

[Purpose of the invention]

The present invention is smaller than the conventional one and has a set (-J
It is an object of the present invention to provide a tilt steering device that has excellent GJ performance and adjustability, and is advantageous in terms of cost compared to conventional devices.

(Structure of the Invention) In order to achieve the above object, the present invention includes a bracket 1 which is attached to a vehicle body, and an upper part having a steering wheel that is swingably held on the bracket with a tilt center as a swing center. comprising a shaft portion and a drive device held by the bracket 1 to swing the upper shaft portion,
The drive device has one engaging member pivotally supported by the bracket at a drive center at a different position such as the tilt center, and the upper shaft portion has the other engaging member that engages with the one engaging member. The structure includes an engaging member, and the driving device causes the one engaging member to swing around the drive center, and the other engaging member that engages with the engaging member to swing around the tilt center. A 4M mechanism is adopted in which the three-sided shaft section, which is provided with the engaging member for the usage, is swung about the tilt center by moving the shaft.

Here, one retaining member is an engaging member fixed to the output shaft of the deceleration speed, and the other retaining member is a member that engages with the one engaging member and is attached to the upper shaft portion. Refers to something that has been established. The upper shaft part is a general term for a part 4Δ that swings around the dill I-hinter, and includes a member on which the other engaging member is provided, an upper main shaft fixed to the member and having a steering wheel at its upper end. refers to something that consists of Furthermore, a drive device includes a rotational drive source and a speed reducer, and the rotational drive source is preferably an electric motor, but is not limited to this. It's okay.

〔Effect of the invention〕

J: According to the present invention, compared to a type in which the tilt center and drive center are aligned, it is possible to assemble the rotary drive source and deceleration mechanism separately and then assemble them to the breakaway bracket and upper bracket 1. Therefore, assembly is easy and assembly errors are less likely to occur.

In addition, compared to the prior application in which both centers do not match, the distance from the drive center to the rotating bin, which is the output shaft, can be made smaller, and the IJs on the steering wheel side can be made smaller.
Since the external force moment applied by l and others is applied to the deceleration mechanism part as a small value, the deceleration mechanism part can be converted into a combination 1,
The space for the driver can be expanded. In addition, unlike the prior application, the attachment extends in the direction of the drive center, rather than using a member such as a link that protrudes into the driver's space, which contributes to expanding the driver's space.
In addition, since it can contribute to reducing the pivot portion, it is possible to reduce the occurrence of "backlash".

In addition, since the device of the present invention uses a tilt center to fix the deceleration mechanism to a fixed member, the rotary drive source and the deceleration mechanism can be installed accurately, and errors in the working angle can be adjusted easily. It has the effect of being easy.

(Example) Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is an overall side view showing one embodiment of the present invention;
The figure is a partial view of FIG. 1 viewed from the bottom of the paper, and in these figures, the upper main shaft 11 to which the steering wheel 10 is attached is connected to the lower main shaft (not shown, inside the column tube 12). Adjust the angle with respect to the frame (which is rotatably fixed with a bearing etc.)
- The tilt steering device @A according to the present invention includes a breakaway bracket 14 installed below the body 13 constituting the Datsushiko board, a rotational drive source B with a mounting number attached on the bracket 14, This driving source B
The upper plow whose JtB movement is tightened by the rotation of the output shaft at the end of the reduction mechanism C which is linked to the
15, and a potentiometer P for detecting the tilt angle of the upper main shaft 11. Note that the attachment 1-38 is fixed to the upper bracket 15 with bolts 15a and 15b.

The rotational drive source B is composed of, for example, an electrically conductive motor and facilitates remote control. A worm wheel 17 is fixed to the tip of the output shaft 16 (FIG. 3) of the rotary drive source B, and a worm wheel 18 of the reducer IC is fixed to the worm wheel 17 of the rotary drive source B.
are engaged.

The reducer IMC is used to reduce the rotational speed of the rotary drive source B and increase the rotation speed by one herk, and has a configuration using an M star gear mechanism, and its internal structure will be explained with reference to Fig. 3. An eccentric shirt (~20) is attached to the center of the housing 19, which is a fixed member, so as to be rotatable around its axis 0+ (gear A7 center), and one end of the shaft 20 is attached to the damper member 21 in the worm wheel 18. The damper member consists of a rubber damper 21A and a metal plate 21B integrally assembled with the rubber damper 21A. The peripheral portion is connected to the shirt ]-20 so as to be able to rotate integrally therewith.

The shape of the eccentric shaft 20 is as shown in FIG. 4, and the axis 01 of the central shaft 201 and the axis 01 of the eccentric shaft 202 are e.
Only eccentric. Further, a guard groove 203 is formed on the outer periphery of the eccentric side of the eccentric shaft portion 202, and flat portions 204 are formed on both sides of the bathhouse 203. Further, the central shaft portion 201 is also formed with a flat portion 205 .

An elastic member 22 (made of rubber in this embodiment) is fitted into the groove 203 of the eccentric shaft portion 202 . The cross-sectional shape of the elastic member 22 matches the groove 203. Further, the height 11 of the member 22 is slightly larger than the depth of the groove 203.

Further, a can 23 is attached to the outer periphery of the eccentric shaft portion 202 (in this case, a collar 23q) is attached to the through hole 23.
The both side flat portions 232 of 1 are the flat portion 2 of the eccentric shaft portion 202.
Slips onto 04. The elastic member 22 presses the collar 23 in the direction of the arrow a in FIG.

A planetary gear 24 is assembled on the outer periphery of the collar 23 and the elastic member 22, and teeth 2 formed on the outer periphery of the gear 24 are attached.
41 is in mesh with two internal gears 25 and 26 at the same time. One internal gear 25 is fixed to the housing 19, and the other driven internal gear 26 has a slightly different number of teeth than the gear 25, and its outer periphery is slidably fitted to the housing 19, and the outer periphery of the driven internal gear 26 is fixed to the housing 19. An annular convex portion 261 (FIGS. 2 and 3) is fixed to the disc-shaped plate 27. Therefore, due to the rotation of the planetary gear 24, the integral parts of the internal gear 26 and the plays (~27) are ultra-decelerated through the output shaft and rotated around the axis 01.Here, the plays 1~27 are rotating bin 28
29 (see FIG. 2) is fixed to the plate 27, and on the opposite side of the axis 01 of the bottle 28 in FIG. It is formed. Therefore, when the plate 27 is rotated as an output side as described above, the rotation pin 28 and the convex portion 29 are integrally rotated 1FI11. However, this rotation distance is a distance within which the convex portion 29 can move within the range of rotation angle α. That is, bolts 30a, 3 are attached to the housing 19 in FIG.
The fixed plate 31 fixed with 0b and 30c has a protruding flat part 3 that protrudes toward the front side in the direction perpendicular to the plane of the paper in FIG.
1a is formed, and the end surface 311.31 of this plane portion 31a
2 so that the protrusion 29 can come into contact with it.

Note that the two convex portions 6 [] above are formed on a line connecting the axis of the bottle 28 and the drive center 01 as shown in FIG. 2, but they are not necessarily limited to such a configuration;
The convex portion 29, the end surface 31'1.3
12 may be provided offset in either direction.

The fixing plate 31 and the housing 19 are connected to each other by bolts 3
The bracket 1 is fixed to the breakaway bracket 14 (FIG. 1) by 3a, 33b, 34.
4 is not shown in FIG. 2, but is disposed on the front side of the protruding flat portion 31a in the direction perpendicular to the plane of the paper in FIG.

FIG. 5 is a sectional view taken along the line V-V in FIG. 1, showing the bolt 34 and nut 35. The swing attachment 38 is attached to the breakaway bracket 14, which is the fixing member, by the threads t736.37 so as to be able to swing relative to the breakaway bracket 14, which is the fixing member. No. 11 39.40 is the breakaway bracket 14 in intervening play 1~. They are each welded and fixed to the attachment men h38. Further, 41 is a bearing metal.

The potentiometer P shown in FIGS. 2 and 3 has its main body 4.
2 is fixed to the above-mentioned housing 19, and the outer peripheral surface of a rubber member 44 fixed to the shaft portion 43 is attached to the attachment 38.
When the attachment 38 swings, the rubber member 44 and shaft portion 43 rotate, converting changes in resistance value into changes in current, and detecting the swing angle of the attachment 38. J: The sea urchin is turning.

Next, the operation of this embodiment will be described. If you want to tilt the steering wheel 10 as indicated by the two-dot chain line 10' or 10'' in Fig. 1, turn on a switch not shown.
By doing so, the rotational drive source B is activated, and the rotational force is transferred from the output shaft 16 (FIG. 3) to the A-arm 17 → worm wheel 18 → damper part 21 → eccentric shaft 1 20
→ Collar 23 → N star gear 24 - ◆ Internal gear 26 → Plate 27 and pin 28 are transmitted in this order, and the pin 28 is located at the axis 0.
Rotates slowly once. Therefore, the attachments 1 to 38 swing around the axis 02 (tilt center) of the bolt 34 via the elongated hole 38b (formed in the swing attachment 38) that engages with the pin 28. This oscillation is performed at a oscillation angle α of Rtill. Note that the long hole 338b is provided in the attachment 38 only for the bottle 28.
This is due to the fact that the attachment members 1 to 38 rotate around the diameter 1 to 2902, whereas the attachment members 1 to 38 rotate around the diameter 1 to 2902.

[Brief explanation of the drawing]

FIG. 1 is a side view of an embodiment of the present invention, FIG. 2 is an enlarged side view of the rotary drive source B and deceleration mechanism C seen from the back side in the direction perpendicular to the paper of FIG. 1, and FIG. Figure 2 is an enlarged sectional view taken along the line ■-■, Figure 4 is a partially exploded perspective view of Figure 3, and Figure 5 is a sectional view taken along the v-v line in Figure 1. Yes. B...Rotary drive source C...Reduction mechanism 14.
...Placeaway bracket 1-15...Upper bracket 19...Housing 28...Rotating bin 01...
...Gi V Center 02...Tilt Hinta P...
・Bodensiometer 38... Attachment special r

Claims (1)

[Claims] (1) 1 racket 1 to be attached to the vehicle body,
an upper shaft portion having a steering wheel held by the bracket so as to be swingable about a tilt center, and a drive device held by the bracket and swinging the upper shaft portion, the drive device has one engaging part I that is pivotally supported on the bracket above the dry top of the printer at a position different from the tilt center, and the upper shaft part is connected to the one engaging member and the engaging member. The driving device causes the one engaging member to swing around the drive center, and the other engaging member that engages with the engaging member is moved to a tilt center. 2) One of the engaging members and the other engaging member are pivoted about the tilt center, thereby causing the upper shaft portion including the other engaging member to swing about the tilt center. 2. The tilt steering device according to claim 1, wherein the distance between the engagement point where the engagement member engages and the tilt center is longer than the distance between the engagement point and the drive center. (3) In neutral state, engagement point, drive center J
3. The i-tilt steering system according to claim 2, wherein the gear center and the tilt center are substantially in a straight line, and the gear center is between the engagement point and the tilt center. (4) The upper shaft portion includes a fixture for shifting the other engaging member to the right;
The tilt steering device according to claim 1, comprising an upper main shaft fixed together with the fixture and having a steering wheel at its upper end. (5) The drive device combines a rotary drive source and a deceleration
The tilt steering device according to claim 1, wherein one engagement member is fixed to the output shaft of the reduction mechanism. (6) The tilt steering according to claim 1, wherein one of the engaging members and the other engaging member has an engaging pin, and the other has an engaging hole that engages with the engaging pin. Device.