JPH0435259Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a tilt type steering column device, and in particular, a fixed bracket is brought into pressure contact with a movable bracket using a tilt lever, and the movable bracket supporting the steering shaft is moved around the tilt hinge. This invention relates to a tilt-type steering column device that can be tilted and fixed at a desired angle.

[Prior Art] Generally, a tilt type steering column device is
As shown in Fig. 3, a movable bracket (distance bracket) 5 that supports the upper steering shaft 1, which is divided into two by a universal joint 3, is attached to a fixed bracket 2 that is fixed to the vehicle body such as an instrument panel. A fastening bolt 6 is provided to penetrate the fixed bracket 2 and the movable bracket 5, and a long hole 8 for moving the fastening bolt 6 in the vertical direction is inserted into the fixed bracket 2 so as to be slidable in the fixed bracket 2. Perforated in both left and right walls. On the other hand, as shown in FIG. 4, the tightening bolt 6 has a rotation stopper 6a at one end that fits into the elongated hole 8, and a spring 15 is elastically loaded at the other end that passes through the elongated hole 8. Part 6b
A lock collar 11, a tilt lever 4, and a lock nut 17 are fitted into the respective parts. The lock collar 11 has a long hole 8 in the pressure contact surface with the fixed bracket 2.
A rotation stop portion 12 and a tooth portion 13 that fit into the rotation stop portion 12 and a tooth portion 13 are formed, and a one-way cam 14 is formed on the rear surface thereof. Fixed bracket 2 with which the teeth 13 are pressed
Teeth 10 are carved into the side wall of the elongated hole 8 on both sides in the longitudinal direction, and the teeth 10 and 13 are configured to be able to mesh with each other. The tilt lever 4 is formed with a protrusion 16 that presses against the one-way cam 14 of the lock collar 11. The lock nut 17 has a collar portion 17a that fits into the rotation hole 4a of the tilt lever 4, and the collar portion 17a and the tilt lever 4 are integrally connected.

Therefore, in the tilt operation, by rotating the tilt lever 4 in either the up or down direction, the protrusion 16 of the tilt lever 4 gradually moves the tooth 13 through the one-way cam 14 of the lock collar 11.
The fixed bracket 2 can be pressed against the movable bracket 5 or released by the force of the spring 15, and the fixed bracket 2 can tighten and fix the movable bracket 5 or can loosen it and make it slidable.

[Problems to be solved by the invention] However, according to the above conventional example, the teeth 10 of the fixed bracket 2 are formed by coining processing (press processing), so the pressing force is very large and a large press machine is required. Since the process is performed with the long hole 8 in between, the thickness of the wall due to pressure is reduced by the long hole 8.
There was a problem that the dimensional accuracy of the tooth portion 10 deteriorated due to the unilateral protrusion to the side. When the dimensional accuracy of the tooth portion 10 deteriorates, the meshing accuracy of the lock collar 11 with the tooth portion 13 decreases, and the force for fixing the movable bracket 5 to the fixed bracket 1 decreases, causing the movable bracket 5 to wobble and cause the steering wheel 9 to move. Needless to say, this causes the inconvenience of vibration, which leads to a decrease in driving performance.

[Means for Solving the Problems] In order to solve the above problems, the present invention aims to solve the above problems by connecting a movable bracket that supports a steering column to a fixed bracket fixed to the vehicle body into a long hole in the fixed bracket through a tightening bolt. A tilt lever having a lock collar and a lock nut is fitted into the tightening bolt so as to be movable up and down along the longitudinal direction of the elongated hole. On the other hand, a tilt-type steering column device is constructed in which slotted holes are bored in a fixed bracket on both the left and right sides, sandwiching teeth cut on both sides in the longitudinal direction of the slotted holes.

[Function] According to the above structure of the present invention, when machining the teeth on the long hole side of the fixed bracket, the long holes are arranged on both the left and right sides of the parts where the teeth are to be carved, so that the press When the pressurizing force of the machine is applied, the wall thickness of the fixed bracket can escape evenly to the long hole side, so the teeth can be carved with high precision.
It meshes with the teeth of the lock collar with high precision.

[Example] The present invention will be explained below based on the illustrated example.

Figure 1 is a partially cutaway side view, Figure 2 is Figure 1-
FIG. In the figure, the same reference numerals as in FIG. 3 indicate the same parts.

In this embodiment, the elongated hole 8 through which the tightening bolt 6 is inserted has elongated holes 18, 18 arranged in parallel on both the left and right sides thereof, and the toothed portion 10 has the elongated holes 18, 18 arranged in parallel on both the left and right sides thereof.
It is engraved on the band parts 19, 19 sandwiched between the two. The elongated hole 18 may be a slit that is thinner than the elongated hole 8 and is sufficient to allow a thickness relief during the coining process. Needless to say, the band portion 19 must have sufficient strength to support the load applied to the movable bracket 5, and must not reduce the rigidity of the fixed bracket 2, so the elongated hole 8 shall also be determined as appropriate. Therefore, when the fixed bracket 2 is press-molded, the elongated hole 18 is punched out at the same time, and the rear toothed portion 10 on which the band portion 19 is formed is coined. During this coining process, the part whose wall thickness should be reduced due to pressurization of the band member 19 can escape equally to both the elongated holes 8 and 18, so that the toothed part 10 to be engraved is formed by the mold. A product with high precision molded along the surface can be obtained. Therefore, it is possible to form the tooth portion 10 with extremely high meshing performance with the tooth portion 13 of the lock collar 11.

When the lock collar 11 is pressed against the band members 19, 19 by operating the tilt lever 4,
Since the band parts 19 and 19 have the elongated holes 8 and 18, a flexible force is generated, which pinches the movable bracket 5 more strongly than other parts of the fixed bracket 2 to maintain a high frictional force, and the tooth part 10 , 13, and has the function of firmly fixing the movable bracket 5 at a desired position. Moreover, the tilt lever 4 has a protrusion 1
6 rotates in the direction of the peak of the one-way cam 14 of the lock collar 11 to tighten and fix the fixed bracket 2 to the movable bracket 5, and also rotates in the opposite direction to fasten the fixed bracket 2 and the movable bracket 5. The operating angle of the tilt lever 4 can be set arbitrarily by the design of the one-way cam 14, and it is possible to set a small operating angle to make effective use of space.

[Effects of the invention] According to the invention described above, when the tilt lever is operated, the teeth of the lock collar engage with the teeth of the fixed bracket, so that the movable bracket moves within the range of the elongated hole through which the tightening bolt is inserted. The tilt steering device, which can be fixed at a desired position in the interior, is provided with teeth on the band that is sandwiched between the elongated holes that are parallel to the elongated holes through which the tightening bolts are inserted. It is formed with high precision, improves the meshing performance with the teeth of the lock collar, improves the performance of fixing the movable bracket to the fixed bracket, and in turn holds the steering wheel without rattling, resulting in the effect of improving driving performance.

[Brief explanation of the drawing]

Figure 1 is a partially cutaway side view, Figure 2 is Figure 1-
Line sectional view, Figure 3 is a partially cutaway side view of the conventional example,
FIG. 4 is an exploded perspective view of the main part of FIG. 3. 1... Steering shaft, 2... Fixed bracket, 4... Tilt lever, 5... Movable bracket, 6... Tightening bolt, 8... Elongated hole, 9... Steering wheel, 10, 13... Teeth , 17
...Rotsuknut.

Claims (1)

[Scope of utility model registration request] A movable bracket that supports the steering column is fitted into a fixed bracket fixed to the vehicle body through a tightening bolt so that it can move up and down along a long hole in the fixed bracket, and the tightening bolt has a longitudinal direction along the long hole of the fixed bracket. A tilt lever having a lock collar and a lock nut formed with teeth that engage with the teeth carved on both sides in the longitudinal direction is inserted, while a tilt lever is inserted on both the left and right sides sandwiching the teeth carved on both sides in the longitudinal direction of the elongated hole. A tilt type steering column device characterized by having a long hole bored in a fixed bracket.