JPH0750299Y2 - Steering device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a steering device used in a vehicle such as a forklift.

In the following description, the front means the left side of FIG. 2, and the rear means the opposite side of the figure. The upper and lower sides mean the upper and lower sides of all the drawings, and the left and right sides mean the left and right sides of FIGS. 1 and 3.

2. Description of the Related Art For example, as one type of tilt steering device capable of finely adjusting the vertical position of a steering wheel, there is one in which the front end of a column tube serves as a tilt center. As shown in FIGS. 2 and 3, the tilt steering device includes a fixed bracket (10) fixed to the vehicle body at the rear portion and a fixed bracket (10) that is rotatable around a tilt center. A tubular column tube support bracket (11) for supporting a column tube (13) having a circular cross section through which the steering shaft (12) is inserted, and a fixing bracket (10). ) And support bracket (1
Both brackets (10) (11) at the overlapping part with 1)
The tilt operating shaft (male screw member) (14) that penetrates through the screw and the male screw portion (14a) of the tip of the tilt operating shaft (14) are screwed together, and together with the tilt operating shaft (14), the fixing bracket (10) A known one is provided with a nut (female screw member) (15) capable of fixing the column tube support bracket (11) and an operation lever (16) fixedly provided around the nut (15). There is.

The fixing bracket (10) has a substantially U shape with an open rear when viewed from above, and connects the left and right side parts (10a) (10b) with the front ends of the left and right side parts (10a) (10b). The column tube support bracket (11) is vertically movable between the left and right side portions (10a) and (10b). At the top of the left and right side parts (10a) (10b),
A mounting seat (10d) is integrally formed, and a bolt (not shown) is inserted from below into a through hole (17) formed in the mounting seat (10d), and the bolt is screwed into the vehicle body to fix the fixing bracket (10d). ) Is fixed to the car body. The column tube support bracket (11) is formed by bending a sheet metal in the thickness direction so that both ends thereof are close to each other. Part (11a) (11b) and left and right side parts (11a) (11
The upper part (11c) that connects the upper ends of b) and the lower ends of the left and right side parts (11a) and (11b) are connected to each other, and are curved inward downward, and the tips are centered in the left-right direction. Left and right pair of arc-shaped parts (18) that are close to each other
It consists of a semicircular lower part (11d). The column tube (13) is passed through the inside of the support bracket (11) with the lower half of the column tube (13) being in close contact with the inner surface of the lower part (11d). It is fixed to the upper edge of the long slot (19) by welding. On the left and right sides (11a) (11b) of the support bracket (11),
Vertically extending elongated holes (20) are formed around the tilt center, and the tilt operation shaft (14) is inserted into these elongated holes (20) from the right side of the right side portion (10b) of the fixing bracket (10). Through the fixed bracket (1
It is projected to the left of the left part (10a) of (0). The tilt operation shaft (14) is fixed to the right side portion (10b) of the fixing bracket (10) by welding. Then, on the left side of the left side portion (10a) of the fixing bracket (10),
Attach the nut (1) to the male thread (14a) on the tip of the tilt operating shaft (14).
5) is screwed in. A circular shaft portion (15a) is integrally formed on the left side of the nut (15), and a front portion of a plate-shaped tilt operation lever (16) is fitted around the circular shaft portion (15a) and fixed by welding.

Such a tilt steering device is usually covered by a plastic cover (not shown) attached to the lower portion (11d) of the column tube support bracket (11).

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, in the conventional tilt steering device, a screw hole for screwing a male screw for fixing the plastic cover is not formed in the lower portion (11d) of the support bracket (11). It is impossible, and it is necessary to separately fix a female screw member such as a nut to the support bracket (11),
There is a problem that the work is troublesome.

An object of the present invention is to provide a steering device that solves the above problems.

Means for Solving the Problems A steering device according to the present invention is characterized in that a tubular column tube support bracket for fixing a column tube having a circular cross section through which a steering shaft is inserted is fixed to a fixing bracket fixed to a vehicle body. The brackets are combined so as to partially overlap with each other, and both brackets are fixed by a male screw member penetrating both brackets at the overlapping portion and a female screw member screwed to the tip thereof. In the steering device, the column tube support bracket is formed into a substantially vertical rectangle by bending the sheet metal in the thickness direction so that both ends thereof are close to each other, and both ends of the sheet metal are one short side of the square. The column tube is made close to
Column tube support bracket above 1 short side and 2
The two long sides are inscribed and fixed to the two long sides by welding.

The column tube support bracket is formed into a substantially vertical rectangle by bending the sheet metal in the thickness direction so that both ends of the sheet metal are close to each other, and both ends of the sheet metal are close to each other at one short side of the square. And the column tube
Column tube support bracket above 1 short side and 2
Since it is inscribed in the two long sides, there is a gap between the outer peripheral surface of the column tube and the one short side of the support bracket, and the male screw that fixes the plastic cover to the column tube support bracket. It is possible to easily form a screw hole for fitting the screw. Moreover, since the column tube is inscribed in the support bracket at three points, the column tube can be easily positioned in the support bracket.

Further, since the column tube is welded to both the long sides while being inscribed in the 1 short side portion and the 2 long side portions of the support bracket, the column tube is welded to the long side portion rather than the welded portion to the column tube. When the support bracket is fixed to the fixed bracket by screwing the female screw member through the male screw member penetrating both brackets at this overlapping portion so that the portion opposite to the one short side portion overlaps the fixed bracket, The function of the column tube can prevent the support bracket from being deformed in the left-right direction. Moreover, only two welding points are required.

Embodiment One embodiment of the present invention will be described below with reference to FIG. In FIG. 1, the same parts and parts as those shown in FIGS. 2 and 3 are designated by the same reference numerals, and the description thereof will be omitted.

FIG. 1 shows a state in which a part of the steering device is cut away and viewed from the rear. In FIG. 1, the tubular column tube support bracket (1), which is arranged between the left and right sides (10a) (10b) of the fixed bracket (10) so as to be rotatable around the tilt center, is made of sheet metal. Is formed by bending in the thickness direction so that both ends are close to each other, forming a vertically long rectangle when viewed from the front, and the left and right side parts (1a) (1b) and the left and right side parts (1a)
The upper part (1c) that connects the upper ends of (1b) and the lower ends of the left and right side parts (1a) and (1b) are connected to form a right angle with the left and right side parts (1a) and (1b). The lower part (1d) is composed of right and left straight projecting wall parts (2) and (3) which project toward each other and whose tips are adjacent to each other at a position offset to the left from the center part in the left-right direction. The column tube (13) is inscribed in the support bracket (1) while being inscribed on the upper surface of the right protruding wall (3) in the lower portion (1d) and the lower inner surfaces of the left and right side portions (1a) (1b). It is passed through and is fixed by welding to the upper edges of the long holes (5) formed in the left and right both sides (1a) and (1b) and long in the front and rear. A screw hole into which a male screw is screwed to fix the plastic cover to the right side of the contact point with the column tube (13) in the right side protruding wall part (3) of the lower part (1d) and the left side protruding wall part (2) respectively. (4) is formed.

In this steering device, the column tube (13)
Since there is a gap between the outer peripheral surface of and the protruding wall portions (2) and (3), the screw hole (4) can be easily formed.

Moreover, the ends of the sheet metal formed in the vertical rectangle are close to each other in the lower portion (1d) of the support bracket (1), and the column tube (13) has a horizontal protrusion on the right side of the lower portion (1d). The upper surface of the wall (3) and both left and right sides (1a) (1b)
Since it is inscribed on the inner surface of the lower part of the column tube (13)
Since the outer peripheral surface of the column is inscribed in the support bracket (1) at three points, the column tube (13) can be easily positioned. Further, since the column tube (13) is fixed to the left and right side portions (1a) (1b) by welding in the above-mentioned inscribed state, the nut (15) is acted by the function of the column tube (13).
It is possible to prevent the lateral deformation of the support bracket (1) when the screw is screwed into the male screw end (14a) of the tilt operation shaft (14). Both ends of the sheet metal formed into a vertical rectangle are located above either the left or right side portions (1a) or (1b) of the support bracket (1) above the column tube (13) or above the column tube (13). ) Are close to each other for the purpose of preventing the support bracket (1) from being deformed in the left-right direction when the nut (15) is screwed into the male thread (14a) at the tip of the tilt operation shaft (14). , Both ends of the sheet metal must be welded together. Therefore, the number of welding points increases and the work becomes troublesome.

In the above embodiments, the device of the present invention is applied to the tilt steering device capable of adjusting the vertical position of the steering wheel, but it is not limited to the tilt steering device. Further, in the above embodiment, the column tube support bracket is formed into a vertical rectangle by bending the sheet metal in the thickness direction so that both ends thereof are close to each other, and the both ends of the sheet metal are The side portions are arranged so as to come close to each other at a position deviated to the one side from the center portion in the left-right direction, but not limited to this, both end portions of the sheet metal are close to each other at the left-right center portion of the lower portion. Good.

EFFECTS OF THE INVENTION According to the steering device of the present invention, as described above, the screw holes can be easily formed on both sides of the contact point with the column tube in the one short side portion where the column tube is inscribed. The holes can be used to easily fix the plastic cover to the column tube support bracket, which simplifies the work of mounting the cover. Also,
Since the column tube contacts the support bracket at three points, the column tube can be easily positioned in the support bracket. Furthermore, even if there are two welding points,
The male screw member and the female screw member can prevent deformation of the support bracket when the support bracket is fixed to the fixed bracket.

[Brief description of drawings]

1 is a partially cutaway rear view showing an embodiment of a steering device of the present invention, FIG. 2 is a side view showing a part of a conventional steering device, and FIG. 3 is a partial cutaway view of a conventional steering device. FIG. (1) …… Cylindrical column tube support bracket, (1d)
...... Lower part, (10) …… Fixing bracket, (12) ……
Steering shaft, (13) …… Column tube,
(14) …… Tilt operating shaft (male thread member), (15) …… Nut (female thread member).

Claims (1)

[Scope of utility model registration request] 1. A tubular column tube support bracket, to which a column tube having a circular cross section through which a steering shaft is inserted is fixed, is partially overlapped with a fixed bracket fixed to a vehicle body. In a steering device in which both brackets are fixed to each other by a male screw member penetrating both brackets in the overlapping portion and a female screw member screwed to the tip of the bracket, the column tube support bracket is , The sheet metal is bent in the thickness direction so that both ends thereof are close to each other to be formed into a substantially vertical rectangle, and both ends of the sheet metal are made to be close to each other by one short side portion of the square, and the column tube is ,
Column tube support bracket above 1 short side and 2
A steering device in which two long sides are inscribed and fixed to the two long sides by welding.