JPH0441019Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a fixing structure for a tilt type steering column, and in particular, the invention relates to a fixing structure for a tilt type steering column. This invention relates to a fixing structure for a tilt-type steering column supported by a bracket.

[Conventional technology]

Conventionally, as a fixing structure of this type of tilt type steering column, for example, the structure shown in FIG. 5 is known (see Japanese Utility Model Application Publication No. 168472/1983).
This is the clamp bracket 1 fixed to the vehicle body side.
A distance bracket 3 integrally constructed with the steering column 2 is fitted to the steering column 2, and a mounting bolt 4 is horizontally suspended so as to pass through the clamp bracket 1 and the distance bracket 3. It has a structure in which a nut 7 integrally connected to the tilt lever 6 is screwed together, and a friction plate 9 is sandwiched between the nut 7 and the clamp bracket 1 via a washer 8.

Therefore, by rotating the tilt lever 6 to loosen the tightening between the mounting bolt 4 and the nut 7, the steering column 2 can be tilted within the range of the elongated hole 10 formed in the clamp bracket 1. After setting the desired angle, the steering column 2 can be fixed by rotating the tilt lever 6 again in the opposite direction. In addition, since the friction plate 9 is firmly clamped between the nut 7 and the clamp bracket 1 when tightened by the tilt lever 6, the friction surface between the two can be increased, and the friction plate 9 can be tightened accordingly. There is an advantage that the holding force increases and the tightening torque of the tilt lever 6 can be reduced.

[Problem that the invention attempts to solve]

However, as mentioned above, the conventional steering column fixing structure using the friction plate 9 attempts to reduce the force required to tighten the tilt lever 6 by increasing the tightening holding force due to the so-called multi-plate effect. Therefore, if the number of friction plates 9 is increased, the friction surface will increase accordingly and the tightening holding force will increase, but in reality, the more the number of friction plates 9 increases, the more the positioning locks formed on the friction plates 9 will increase. Processing the protrusions becomes troublesome,
Also, I have heard that even though the tilt lever 6 is loosened, the friction plates 9 are stuck together and cannot be loosened, so there is a limit to the number of friction plates 9 that can be used.
Its effectiveness was also limited.

The present invention was developed from this perspective, and its purpose is to create a simple structure that does not require the conventional multi-plate structure, and that can be easily tightened using the tilt lever. An object of the present invention is to provide a tilt type steering column fixing structure capable of fixing a steering column.

[Means for solving problems]

As a means for achieving the above-mentioned object, the present invention provides a distance bracket that is integral with the steering column, which has a pair of side wall parts by tightening with a mounting bolt that is integrally connected to a tightening member and a tilt lever. In the fixed structure of a tilt type steering column supported by a clamp bracket, the tightening member includes a rod having one end secured to one of the side walls of the clamp bracket, and a rod disposed on both sides of the rod. and a pair of blocks formed with a V-groove portion into which the rod fits, and a nut and a stopper member for preventing rotation of the nut that moves integrally with the nut on the other side wall portion of the clamp bracket. When the tilt lever is tightened, the rod is sandwiched between the blocks from both sides, and
The block and the nut press and tighten the clamp bracket against the distance bracket.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 shows an exploded view of the steering column fixing structure according to the present invention. In this figure, reference numeral 11 is a clamp bracket,
Weld bolts 13, 13 for fixing the vehicle body are erected on the upper wall portion 12. The clamp bracket 11 also has a pair of side walls 14a, 14b, each of which is provided with a vertical elongated hole 15a, 15b. Further, the left side wall 14a is provided with a pair of small holes 16, 16 near the upper end of the elongated hole 15a, and the right side wall 14b has outer bent flanges 17a, 17b at the upper and lower ends. Rubber stoppers 18a and 18b for cushioning during tilting operation are fitted and fixed in the. Further, in the figure, reference numeral 19 denotes a distance bracket fixed to the steering column 20 so as to be applied from below, and the side wall portions 14a, 14b of the clamp bracket 11
It has side walls 21a and 21b that are fitted in between. A strength member 22 is installed on the side walls 21a and 21b, and through holes 23a and 23b (only the left through hole 23a is shown in the figure) are formed to penetrate through the hollow interior of the strength member 22. . These through holes 23a, 23b and the long holes 15a, 15b
A mounting bolt 25 that is integrally connected to the tilt lever 24 is inserted through the mounting bolt 25 . Further, on the outside of the side wall portions 14a, 14b of the clamp bracket 11, tightening members 26a, 26b are arranged to fix the distance bracket 19 to the clamp bracket 11 by tightening with the mounting bolt 25. . The tightening member 26a disposed on the left side includes a pair of substantially L-shaped round rods 27, 27 whose upper ends are loosely fitted into the small holes 16, 16 of the side wall 14a.
It is composed of a pair of blocks 28a and 28b that sandwich the rods 27 and 27 from both sides. Vertical V-grooves 29a and 29b are formed on the inner surfaces of the blocks 28a and 28b, respectively, corresponding to the positions where the rods 27 and 27 are disposed. The V grooves 29a, 29b are formed in a substantially V-shaped cross section, and the rods 27, 2 have a perfect circular cross section.
7, the rods 27, 27 come into contact with the left and right walls of the V-grooves 29a, 29b. In addition, insertion holes 30a and 30b for the mounting bolts 25 are formed in the centers of these blocks 28a and 28b, but in particular, the inner circumferential wall of the insertion hole 30a of the block 28a located on the outside is provided with the insertion holes 30a and 30b for the mounting bolts 25. A right-handed thread is cut to engage with a male threaded portion 31a carved at the base end. On the other hand, the tightening member 2 disposed on the right side
6b is a left-handed threaded nut 32 that is screwed into a male threaded portion 31b carved at the tip of the mounting bolt 25;
Stopper member 33 for preventing rotation of this nut 32
and a clip 35 that is fitted and locked into the rear end groove 34 of the nut 32. Stopper member 33
A fitting hole 36 with serrations is provided in which the nut 32 is fitted, and the stopper member 33 and the nut 32 can move together.
The upper and lower ends of this fitting hole 36 are fitted into the long holes 15b of the side wall portion 14b, and the stopper members 33 are inserted into the long holes 15b of the side wall portion 14b.
A protrusion 3 serves as a guide when sliding in the vertical direction along b and also prevents the nut 32 from rotating.
7a and 37b are integrally formed. Reference numeral 38 in FIG. 1 is a spring for raising the steering column 20, and its end portion is secured to the clamp bracket 11 and its intermediate portion is secured to the distance bracket 19.

FIG. 2 shows an assembled sectional view of each of the above-mentioned constituent members. As is clear from the above explanation,
The mounting bolts 25 passing through each component fix the distance bracket 19 by tightening with respective fastening members 26a, 26b disposed on the outside of the side walls 14a, 14b of the clamp bracket 11. When using the left tightening member 26a using a pair of blocks 28a and 28b, the mounting bolt 25 first rotates as the tilt lever 24 rotates in the tightening direction, and the outer block 28a gradually tightens. go. As shown in FIG. 3, the V-groove portions 29 of both blocks 28a and 28b
With the rods 27 and 27 fitted in a and 29b, insert them from both sides, and then press the inner block 2.
8b to press the side wall portion 14a. Block 2 above
When sandwiched between 8a and 28b, rods 27 and 2
7 is tightened in such a way as to spread out the V-grooves 29a and 29b, so that the holding force is increased by a so-called wedge action, and the blocks 28a and 28b are firmly clamped. Also, rod 27, 27
The upper end portion is a small hole 16,1 opened in the side wall portion 14a.
6, so this rod 27, 27
Block 28 to clamp bracket 11 via
a, 28b are fixed, and block 2
In addition to the pressure applied to the side wall portion 14a by 8a and 28b, this serves to fix the distance bracket 19. Furthermore, when the rods 27, 27 are tightened by the blocks 28a, 28b, a large holding force can be obtained due to the wedge action, so the rotational torque of the tilt lever 24 can be reduced accordingly compared to the conventional one. Become.

On the other hand, the right tightening member 2 using the nut 32
6b, the nut 32 is tightened by the rotation of the mounting bolt 25, presses the side wall portion 14b of the clamp bracket 11, and presses the side wall portion 14b of the clamp bracket 11.
The distance bracket 19 is fixed to b by pressure contact. In this way, distance bracket 1
Both side walls 21a and 21b of the clamp bracket 9 are fixed to the side wall portions 14a and 14b of the clamp bracket 11. As explained above, the angle of the steering column 20 can be determined by the means for tightening the rod and the block using a wedge action and the means for tightening the nut and the block for pressing the clamp bracket against the distance bracket. can. Incidentally, when tilting the steering column 20, the tilt lever 24 is rotated in the opposite direction to that described above, and the tightening by the blocks 28a and 28b and the tightening by the nut 32 are released. Slide movement is possible. In this case, blocks 28a, 28
b slides while being guided by the rods 27, 27, and the nut 32 is guided by a stopper member 33. The stopper member 33 is buffered by rubber stoppers 18a and 18b at the upper and lower ends of the elongated hole 15b. Moreover, the rods 27, 27 can be released easily and reliably by the blocks 28a, 28b because the rods 27, 27 can be easily separated from the V-grooves 29a, 29b by simply loosening the outer block 28a.

FIG. 4 shows an embodiment of a steering device equipped with the aforementioned steering column fixing structure. In this steering device, a steering column 2 that includes a steering shaft 40 is provided.
0 is composed of a single cylindrical member, and the above-mentioned fixing part is provided in the middle part. The clamp bracket 11 is attached to the mounting bracket 4 on the vehicle body side.
Slide block 4 removably attached to 5
It is fixed to the vehicle body via 6. In addition, a bracket 4 is provided with a slide hole 42 in the axial direction at the base end.
1 is fitted and fixed, and this slide hole 4
The tip end portion of 2 is rotatably supported by a pin 44 on a support bracket 43 fixed to the vehicle body. Therefore, by rotating the tilt lever 24 and releasing the fixation of the distance bracket 19, the steering column 20 rotates about the pin 44 and tilts within the range of the elongated hole 15a of the clamp bracket 11. It becomes possible. Note that if an axial impact load is applied to the steering column 20 due to a vehicle collision, etc., the pin 44
The structure is such that it can relatively move rearward within the slide hole 42 and absorb the above-mentioned impact load.

〔effect〕

As explained above, according to the fixing structure of the tilt type steering column according to the present invention, the tightening means between the rod and the block using a wedge action, and the means for tightening the rod and the block that press the clamp bracket against the distance bracket and the nut are combined. Since the steering column is fixed by two tightening means, a large holding force can be obtained with a small tightening torque. Therefore, it is possible to obtain a specified holding force with a smaller tightening torque compared to the conventional multi-plate type holding means that uses only friction surfaces, and the operability of the tilt lever is improved. It's extremely simple.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view showing one embodiment of the fixing structure for a tilt type steering column according to the present invention, Fig. 2 is an assembled cross-sectional view of the above fixing structure, and Fig. 3 is a second
FIG. 4 is a front view showing an embodiment of a tilt type steering device having this fixing structure, and FIG. 5 is a sectional view showing an example of a conventional fixing structure for a tilt type steering column. . 11...Clamp bracket, 14a, 14b
... Side wall part, 19 ... Distance bracket,
20... Steering column, 24... Tilt lever, 25... Mounting bolt, 26a... Tightening member, 27... Rod, 28a, 28b... Block, 29a, 29b... V groove, 32... Nut, 33... Stopper member.

Claims (1)

[Scope of utility model registration request] A tilt type steering column in which a distance bracket integral with the steering column is supported by a clamp bracket having a pair of side walls by tightening a mounting bolt integrally connected to a tightening member and a tilt lever. In the fixed structure, the tightening member includes a rod having one end secured to one of the side walls of the clamp bracket, and V grooves disposed on both sides of the rod into which the rod fits. The clamp bracket has a nut on the other side wall of the clamp bracket, and a stopper member for preventing rotation of the nut that moves together with the nut, and is configured to tighten the tilt lever. A fixing structure for a tilt type steering column, characterized in that, during operation, the rod is sandwiched between the blocks from both sides, and the blocks and the nut press and tighten the clamp bracket against the distance bracket.