JPH0611862Y2 - Steering gear box mounting structure - Google Patents

Description

Detailed Description of the Invention a. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting structure for fastening a steering gear box to a vehicle body frame by inserting bolts into the vehicle body frame composed of a pair of panels arranged to face each other.

b. 2. Description of the Related Art FIG. 5 and FIG. 6 show a steering gear box 4 mounted on a vertical side wall surface 3a of a vehicle body frame 3 composed of an inner panel 1 and an outer panel 2 arranged to face each other.
This steering gear box 4
Is fastened and fixed to the vehicle body frame 3 with, for example, three bolts 5 and nuts 6.

By the way, in order to fasten and fix the steering gear box 4 to the vehicle body frame 3, a mounting structure as shown in FIGS. 6 and 7 has been conventionally adopted. In the case of FIG. 6,
A pipe member 7 is arranged between the inner panel 1 and the outer panel 2 of the vehicle body frame 3 by welding or the like, and a bolt is inserted through the bolt insertion hole 8 formed in the steering gear box 4 and the pipe member 7 to obtain a nut. The mounting structure is such that it is screwed into 6. In the case of FIG. 7, the bolt 5 is inserted into the bolt insertion hole 9 formed in the inner panel 1 and the insertion hole 8 of the steering gear box 4, and the nut 6 is inserted.
It is a mounting structure that is screwed into.

c. Problems to be Solved by the Invention In the mounting structure shown in FIG. 6, when the steering gear box 4 is assembled to the vehicle body frame 3, the bolt 5 can be supported while being inserted into the pipe member 7, so that the operator is heavy. Although it is not necessary to hold the steering gear box 4 by hand for a long time, the work can be easily performed.
The nuts 6 and the tips of the bolts 5 may be present as protrusions A on the outside of the vehicle body frame 3 and may interfere with the space in which the tires 10 and the like are arranged. In such a case, a recess B is formed in the vehicle body frame 3 in order to retract the nut 6 and the like from the space for disposing the tire 10 and the like.
It is necessary to arrange the nut 6 and the like inside.

Further, in the mounting structure shown in FIG. 7, since the screw portion 5a of the bolt 5 is in a state of protruding from the vehicle body frame 3 before the steering gear box 4 is assembled, the screw threads are crushed in the process before the assembly. There is a drawback that it is easy to get it.

In order to eliminate such a drawback, it is conceivable to use a pipe member 7 having a threaded portion 11 formed on the inner peripheral surface on one end side as shown in FIG. There is a problem that spatter or the like adheres to the threaded portion 11 at the time of welding the pipe member 7 to the thread 3, and the function as the threaded portion 11 cannot be achieved, and it cannot be put to practical use.

The present invention has been made in view of the above situation, and an object thereof is to easily and efficiently attach a steering gear box to a vehicle body frame, and to prevent an external protruding portion from the vehicle body frame. It is to provide a mounting structure for a steering gear box configured as described above.

d. Means for Solving the Problems In order to solve the above-mentioned problems, in the present invention, a steering gear box is fixed by bolts to a vehicle body frame composed of a pair of panels arranged to face each other. In the steering gear box mounting structure described above, a nut having a threaded portion at an intermediate portion of the central through hole is fixed between a pair of panels of the vehicle body frame, and a cylinder having a diameter smaller than the threaded portion of the nut is provided at the tip of the threaded portion. The bolt formed by extending the portion is used as a tightening member, the cylindrical portion of the bolt is inserted into the threaded portion of the nut through the bolt insertion hole of the steering gear box, and then the threaded portion of the bolt is attached to the nut. By screwing into the screw part,
The steering gear box is fastened and fixed to the vehicle body frame under the condition that the entire length of the columnar portion is housed and arranged in the central through hole of the nut without the tip of the columnar portion protruding from one end of the nut. I am trying.

Hereinafter, an embodiment of the present invention will be described with reference to FIGS.

Figure 1 shows the steering gear box for the vehicle body frame 12.
This shows the mounting structure of the steering gear box 13. In this example, the steering gear box 13 is fastened and fixed to the vehicle body frame 12 by three bolts 14. The body frame 12 described above is an inner panel as shown in FIG.
The inner panel 15 is provided with a reinforcing panel 17 on the surface on the outer panel 16 side. A central through hole is formed between the inner panel 15 and the outer panel 16 which face each other.
18 has cylindrical surfaces 18a and 18b on both end sides and these cylindrical surfaces 1
A nut 19 having a threaded portion 18c is fixed by welding 20 or the like at an intermediate portion of the central through hole 18 between 8a and 18b. The diameter of the cylindrical surfaces 18a and 18b of the nut 19 is the same as or slightly larger than the root diameter of the threaded portion 18c.

On the other hand, the bolt 14 used for tightening and fixing the steering gear box 4 has a spring washer 21 corresponding to the head 14a as shown in FIG. 2, and is provided at one end opposite to the head 14a. Is a cylindrical part with no threads
It has 14b. Thus, the bolt 14 of the present example has a hexagonal head portion 14a, a spring washer mounting portion 14c, and a screw portion 14 formed between the mounting portion 14c and the column portion 14b.
It is composed of d and the cylindrical portion 14b. The diameter of the cylindrical portion 14b is formed to be slightly smaller than the root diameter of the screw portion 18c of the nut 19, and the screw portion 14 of the bolt 14 is formed.
d is formed so as to be screwed into the threaded portion 18c of the nut 19. Further, the length of the lower part of the neck of the bolt 14 or the threaded portion 14
The total length of d and the cylindrical portion 14b is the same as the steering gear box 13
The length is set so that the tip of the cylindrical portion 14b of the bolt 14 does not protrude from the nut 19 when it is mounted as described below.

Next, an operation procedure for attaching the steering gear box 13 to the vehicle body frame 12 using the bolts 14 as described above will be described.

First, as shown in FIG. 4, insert the bolt 14 into the steering gear box 13 from the side of the cylindrical portion 14b to a predetermined bolt insertion hole.
22 while inserting the column portion 14b into the vehicle body frame 1
The second inner panel 15 side is inserted into the threaded portion 18c in the central through hole 18 of the nut 19. However, under this condition, even if the weight of the steering gear box 13 is applied to the bolt 14, the engagement between the screw hole of the nut 19 and the cylindrical portion 14b of the bolt 14 causes the steering gear box 13 and the bolt. The 14 is held in the temporarily fixed state without dropping from the body frame 12 by its own weight. Therefore, after the operator temporarily holds the steering gear box 13 as shown in FIG. 4, the steering gear box 13 is released from being held by hand, and then the bolt 14 is rotated by a spanner or the like so that the bolt 14 is screwed. The portion 14d is screwed into the screw portion 18c of the nut 19, and the steering gear box 13 is attached to the inner panel 15 of the vehicle body frame 12.
The vertical side wall surface 23 is fixed by tightening. At this time, bolt 14
Since the entire lengths of the screw portion 14d and the columnar portion 14b of the bolt 14 are set to a predetermined length as described above, the tip of the columnar portion 14b of the bolt 14 under the mounting state of the steering gear box 13 to the vehicle body frame 12. Without protruding outward from the outer panel 16, the cylindrical portion 14b is formed in the central through hole 18 of the nut 19.
It is housed and arranged in the cylindrical surface 18b.

According to such a mounting structure, the time for holding the heavy steering gear box 13 when mounting it is
As shown in the figure, the bolt 14 can be inserted (temporarily fixed) in a short time, so that the mounting operation can be performed easily and efficiently. Further, when the mounting is completed, the columnar portion 14b of the bolt 14 is accommodated in the cylindrical surface 18b of the nut 19, so that the columnar portion 14b can be prevented from protruding from the outer panel 16 of the vehicle body frame 12. Therefore, it is not necessary to form the recess B as shown in FIG. 6, and the layout of the vehicle body frame 12 is easy, which is advantageous in design. Moreover, since the threaded portion 18c of the nut 19 is located at an intermediate portion of the central through hole 18, there is an advantage that spatter hardly adheres to the threaded portion 18c when the nut 19 is welded to the vehicle body frame 12.

As mentioned above, although one embodiment of the present invention has been described, the present invention is not limited to the above-mentioned embodiment, and various modifications and changes can be made based on the technical idea of the present invention.

For example, in the embodiment described above, the steering gear box
The bolts 14 and the nuts 19 are used at all three positions of 13, but the bolts 14 and the nuts 19 are used only at the positions that interfere with the space of the wheel, and the other parts are mounted by the conventional mounting as shown in FIG. You may make it employ | adopt a structure.

e. As described above, according to the present invention, the nut having the threaded portion at the intermediate portion of the central through hole and fixed between the pair of panels of the vehicle body frame and the threaded portion of the nut at the tip of the threaded portion Also, since the steering gear box is attached to the vehicle body frame by using a bolt having a small-diameter cylindrical portion, the bolt is inserted through the bolt insertion hole of the steering gear box when attaching the steering gear box. By inserting the cylindrical portion of the bolt into the threaded portion of the nut by inserting it into the central through hole of the nut, the steering gear box is temporarily fixed by the engaging action of the cylindrical portion of the bolt and the threaded portion of the nut. can do. Therefore, it is not necessary for the operator to hold the steering gear box for a long time after holding the steering gear box until the bolts are completely tightened, but before the steering gear box is temporarily fixed as described above. Therefore, the time for holding the steering gear box is short, and the mounting work can be performed easily and efficiently in a short time.

Further, according to the present invention, under the condition that the entire length of the cylindrical portion is housed in the central through hole of the nut without the tip of the cylindrical portion of the bolt protruding from one end of the nut,
Since the steering gear box is fastened and fixed to the vehicle body frame, the columnar portion of the bolt after completion of the fastening is arranged in the central through hole of the nut, and this columnar portion projects from the vehicle body frame and Since it does not interfere with the arrangement space, it is not necessary to provide a concave portion at a portion of the vehicle body frame corresponding to the wheel unlike the conventional case. As a result, there is an advantage that layout can be facilitated in setting the body frame.

Furthermore, since the threaded part of the nut is located in the middle of the central through hole, spatter does not easily adhere to the threaded part of the nut when the nut is attached to the vehicle body frame by welding, and the occurrence of defects in the threaded part due to spatter adhesion is reduced. Therefore, the quality can be improved.

[Brief description of drawings]

1 to 4 show an embodiment of the present invention. FIG. 1 is a sectional view showing a mounting structure of a steering gear box to a vehicle body frame, and FIG. 2 is a mounting view of the steering gear box. FIG. 5 is a side view of a bolt used, FIG. 3 is an enlarged sectional view of an essential part showing a nut fixed to a vehicle body frame, and FIG. 4 is an enlarged sectional view of an essential part showing a work at the time of mounting a steering gear box. FIG. 8 is a view for explaining a conventional steering gear box mounting structure, FIG. 5 is a front view of the steering gear box mounted on the vehicle body frame, and FIG. 6 is a VI in FIG.
7 is a sectional view showing another example of the mounting structure of the steering gear box. 12 …… Body frame, 13 …… Steering gear box, 14 …… Bolt, 14a …… Head, 14b …… Cylinder part, 14d …… Screw part, 15 …… Inner panel, 16 …… Outer panel, 18 …… Central through hole, 18a, 18b …… cylindrical surface, 18c …… screw part, 19 …… nut, 20 …… welding, 22 …… bolt insertion hole, 23 …… vertical side wall surface.

Claims (1)

[Scope of utility model registration request] 1. A steering gear box mounting structure in which a steering gear box is fixed by bolts to a vehicle body frame composed of a pair of panels arranged to face each other. A nut having a threaded portion is fixed between a pair of panels of the vehicle body frame, and a bolt having a cylindrical portion having a diameter smaller than that of the threaded portion of the nut extended at the tip of the threaded portion is used as a tightening member. By inserting the columnar part of the bolt into the threaded part of the nut through the bolt insertion hole of the steering gear box and then screwing the threaded part of the bolt into the threaded part of the nut, the tip of the columnar part of the nut Under the condition that the entire length of the columnar portion is housed and arranged in the central through hole of the nut without protruding from one end, it is attached to the front of the body frame. Mounting structure of the steering gear box being characterized in that so as to clamping the steering gear box.