JPH03239614A - Member connecting structure - Google Patents

Abstract

PURPOSE:To improve accuracy and repairability by equalizing the diameter of the bolt through hole of one member to the outer diameter of a bolt, and forming a housing chamber for loosely housing retainer nuts on the back side of a wall face, in connection structure with bolts, nut for the suspension device, etc. of automobiles. CONSTITUTION:Each pair of bolt holes 22-25 are formed on the two opposite walls of the wall portion 20 of a car body, collars 26, 27 are inserted between the bolts 22, 23 and the holes 24, 25, and bolts 28, 29 are inserted thereto from the outside of the car body. A supporting member 30 is attached to the inner surface of the car body on the wall portion 20 of the car body to cover the bolt holes 22, 24 and also to open the upper portion of the wall surface for making a box shape so that retainer nuts 32, 33 are loosely housed therein. The inner diameters of bolt holes 22, 24 are approximately equalized to the outer diameters of the bolts 28, 29 respectively. According to this constitution, it is unnecessary to retain the retainer nuts, fastening and removal can be carried out only by rotating the bolts, positional accuracy can be maintained and repairability can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a member connection structure, and particularly to a member connection structure suitable for a suspension mounting portion of an automobile.

(Prior art) - In the connection structure that connects each link of the suspension device to the vehicle body, it is important that the link structure does not inhibit the swinging ability of the links, that it has sufficient rigidity, and that it does not increase weight. is required.

For example, Japanese Patent Application Laid-Open No. 63-25115 discloses a connection structure between a tower portion and a side member on the vehicle body side. In this structure, a part of the tower that swingably supports one end of the upper link and lower link is placed along the side member in the vertical direction of the vehicle body, two bolts are inserted through both, and the tip of the bolt is inserted. is screwed into a weld nut (a nut fixed by welding) on the back side of the side member to connect the two.

According to this, in addition to the connection between the cross member (integrated with part of the tower) and the car body, it is also possible to connect the tower part and the car body, increasing rigidity without increasing weight.

(Problem to be Solved by the Invention) However, in such a conventional connection structure, a weld nut is fixed to the back surface of the side member, and a bolt is screwed into this weld nut. There were various problems such as difficulty in achieving the required accuracy as the accuracy was determined by

Here, instead of the weld nut, it is conceivable to use a retainer nut in which the nut is shaped like a plate.

Figure 10 is its conceptual diagram, 10 is the side member,
The side members 10 are provided with bolts 1-13 and 14 supported by support members 11 and 12, respectively, on the inside of the vehicle (corresponding to the back surface described above), and bolts 15 are inserted through a portion of the tower (not shown) and the side members 10. Insert .16,
Thread the ends of bolts 15.16 into retainer nuts 13.14. Eliminates the need for weld nuts, making it easier to achieve accuracy.

However, depending on the vehicle, the upper part of the side member 10 (especially the retainer nut 14 side) may be covered with a cowl top 17, and if the thread of the retainer nut 14 is damaged, for example, the entire cross member must be replaced. However, there is a drawback that repairability cannot be improved in the same way.

The present invention was made by focusing on these problems.
The goal is to improve accuracy and repairability by devising the installation of the retainer nut.

(Means for Solving the Problems) In order to achieve the above-mentioned problems, the present invention provides a first member with a second member.
A plurality of bolts are inserted along the member, passing through both members from the first member side to the second member side, and a retainer nut is screwed onto the tip of each bolt protruding from the back surface of the second member. In the member connecting structure for connecting both members together, the second member
A housing in which the inner diameter of the bolt through hole of the member and the outer diameter of the bolt almost match, and at least a part of the wall surface is opened larger than the retainer nut, and the wall surface is stretched so as to surround the tips of the plurality of bolts. A chamber is formed on the back surface of the second member, and a plurality of retainer nuts are accommodated in the chamber in a loosely fitted state, preferably at an angle with respect to a straight line connecting the centers of the screw holes of the pair of retainer nuts. The present invention is characterized in that surfaces that intersect are formed at opposite ends of a pair of adjacent retainer nuts, and the two surfaces formed at each opposite end are spaced apart from each other when the retainer nut rotates as the bolt is tightened.

(Function) In the present invention, a plurality of retainer nuts are sequentially installed through an open wall surface. At this time, if a retainer nut cannot be directly installed in a predetermined position due to an obstruction such as a cowl top, it is installed in another position where it can be easily installed. After that, by successively attaching another retainer nut, the retainer is moved inside the storage chamber by being pushed by the retainer nut attached later, and is attached to a predetermined position.

Then, when a plurality of bolts are inserted through the first member and the second member, the bolts are aligned with the bolt through holes of the second member, and the tips of the aligned bolts are attached to the retainer nut attached to the predetermined position. The first member and the second member are coupled by being screwed together.

Alternatively, when the retainer nut and the bolt are screwed together, the opposing surfaces of a pair of adjacent retainer nuts are separated from each other, thereby avoiding interference with the retainer nut that has been screwed together.

(Example) Hereinafter, the present invention will be explained based on the drawings.

1 to 9 are diagrams showing embodiments of the member connection structure according to the present invention, and are examples in which the structure is applied to a double wishbone type vehicle suspension device.

In FIG. 1, 20 is a car body wall part, and the car body wall part 20
A part of the upper side of is covered with a cowl top 21.

There are two on each of the two opposing walls of the vehicle body wall 20 (a total of 4
Two bolt holes 22-25 are formed, and a collar 26, 27 is mounted between each pair of bolt holes (22 and 23 and 24 and 25). These bolt holes 22~
25 and two bolts 28. in the collar 26.27.
29 is inserted, and the insertion is performed from the outside of the vehicle body toward the inside. Further, a support member 30 is attached to the inside side of the car body wall portion 20 (the back side when viewed from the outside of the car body), and the support member 30 covers the two bolt holes 22 and 24 on the inside side of the car body, and The upper wall surface is opened to form a box-shaped chamber (accommodation chamber). Preferably, a tool insertion hole 31 is formed in the bottom wall surface. Vehicle body wall 20
The inner diameters of the two bolt holes (through holes) 22, 24 in the example are made to approximately match the outer diameters of the bolts 28, 29.

There are retainer nuts 32 and 33 (bolts 28
．． 29) are accommodated in a loosely fitted state, and the open area of the upper wall surface is sufficiently wide to allow one retainer nut to pass through.

FIG. 2 is a plan view of the suspension device near one wheel side. Reference numeral 40 denotes a subframe that is attached to the vehicle body (the road shown) through mount insulators 41 and 42, and a lower arm 45 is attached to the subframe 40 via swing connection points 43 and 44. 46 is an upper arm arranged above the lower arm 45, and the swinging tip 47 of these lower arms 45 and the upper arm 46
An axle-side member (not shown) is attached to the swinging tip (button) 48 of.

Here, the swing fulcrum 49 of the upper arm 46 and the vehicle body wall 2
0, the connection structure shown in FIG. 1 is used.

That is, the upper arm bracket (first member) 52 attached to the swing fulcrum 49 of the upper arm 46 by bolts 50 and bushings 51 is attached to the vehicle body wall (second member) by two bolts (plurality of bolts) 28 and 29. )20
is attached to.

Hereinafter, the state of this connecting portion will be explained in detail with reference to Fig. 3.4. In FIG. 3, an axle side member 53 is attached to the swinging tip 48 of the upper arm 46, and an upper arm bracket 5 is attached to the swinging fulcrum 49 of the upper arm 46.
2 is installed. Upper arm bracket 52
has four bolts (two of them 28.29 are long;
The remaining two bolts 54 and 55 are short) to be attached to the vehicle body wall 20 (the path shown). Short bolt 54.
55 is welded and fixed to the vehicle body wall 20, as shown in FIG.
2 is connected to the vehicle body wall portion 20. The connection structure described above is applied between the upper part of the upper arm bracket 52 and the vehicle body wall 20. That is, in FIG. 4, after the upper arm bracket 52 is aligned along the vehicle body wall 20 and the lower part of the upper arm bracket 52 is fixed with nuts 56 and 57, there is a gap between the upper arm bracket 52 and the vehicle body wall 20 outside the vehicle body. Insert bolts 28 and 29 from the side. Here, bolt holes 22.2 of 20 examples of vehicle body walls
Since the inner diameter of the bolt 4 almost matches the outer diameter of the bolt 28, 29, the positioning accuracy when inserting the bolt 28, 29 is high.

Note that retainer nuts 32 and 33 are attached to the support member 30 (accommodation chamber) in advance. In this way, bolt 28
．． 29 is screwed into retainer nuts 32 and 33 to connect and fix the upper part of the upper arm bracket 52 to the vehicle body wall 20. In addition, upper arm bracket 52 is shown in FIG.
, bolts 28, 29, 54, 55, nuts 56, 57, and retainer nuts 32, 33.

FIG. 6.7 is a diagram showing the retainer nut 32.33, which has a screw hole 58 into which the tip of the bolt 28.29 is screwed, a protrusion 59, and a curved surface 60 at the tip of the protrusion 59. . Note that the hatched surface is a fastening surface 61 that comes into strong pressure contact with the vehicle body wall 20 when the bolts 28 and 29 are screwed together.

As shown in FIG. 1, the retainer nuts 32 and 33 having such a shape are installed in advance inside the support member 30 (accommodating chamber). The order of installation is: ■ First, attach one retainer nut 3.
3 into the storage chamber through the open surface in the direction shown in the figure. Next, while bringing the curved surface 60 of one glue china nano-dot 33 into contact with the curved surface 60 of the other glue china nano-dot 32, insert this other glue china nano-dot 7. 32 into the housing chamber, one glue chain nano-dot 33 moves while sliding inside the housing chamber, and when the other glue chain nano-dot 32 is completely attached, one glue chain nano-dot 33 is mounted almost at a predetermined position. Therefore, the inconvenience that, for example, it is difficult to attach the one-sided glue handle 33 due to the cowl bump 21 getting in the way is eliminated.

In this way, in this embodiment, the bolt holes 2 of the vehicle body wall 20 are
In addition to making the inner diameter of the bolt 2.24 approximately match the outer diameter of the bolt 28.29, a housing chamber is formed using the support member 30, and the China nano-nodes 32 and 33 can be successively installed from the open surface of this housing chamber. , the insertion accuracy of the bolts 28 and 29 can be maintained sufficiently, and the retainer nut 3
2.33 can be easily replaced and repairability can be improved. Note that the position of the retainer nut 32.33 can be finely adjusted by using the tool insertion hole 31 in the storage chamber.
33 can be easily removed.

Various modifications of the shape of the retainer nuts 32, 33 are possible. FIG. 8.9 is a diagram showing a preferable example thereof, and the glue hole nodes 70, 71 in FIG. and these two faces 7
The lengths of the retainer nuts 70 and 71 are set appropriately so that the retainer nuts 70 and 75 come into contact with each other when the retainer nuts 4.75 are installed in the housing chamber. In this way, the two opposing surfaces 74 and 75 can be brought into contact with each other at the time of installation, and the glue hole on one side can push the glue hole on the other side.

Furthermore, if the direction of inclination is set so that the two surfaces 74.75 separate (arrows a, b) when the bolts 28, 29 are screwed together and the rotational movement (arrow ASB) of the glued nano-node 70.71 occurs, both sides can be Since the rotational movements of the bolts 28, 29 and the retainer nut 70, 71 do not interfere with each other, the retainer nut, which has been fastened first and is stable, will not be rotated by the retainer nut that is fastened later.
This can prevent loosening between the parts.

In addition, in the retainer nut 80.81 shown in FIG.
5) Forming. Even in this case, while the two surfaces of any pair come into contact during installation, the two contact surfaces separate when screwed together.

(Effects) According to the present invention, since the attachment of the retainer pad is devised as described above, it is possible to improve repairability while maintaining positional accuracy.

[Brief explanation of drawings]

1 to 9 are diagrams showing an embodiment of a vehicle suspension device to which the member connection structure according to the present invention is applied. FIG. 1 is a perspective view of the main part thereof, and FIG. A plan view of the vicinity, Figure 3 is a side view of the main part of Figure 2, Figure 4 is a view of the upper arm bracket area seen from the rear of the vehicle,
5 is an exploded view including the upper arm bracket, FIG. 6 is a side view of the retainer nut, FIG. 7 is a plan view of the retainer nut, FIG. 8 is a plan view showing another preferred example of the retainer nut, and FIG. 9 is a plan view of the retainer nut. The figure is a plan view showing still another preferable example of the retainer shaft, and FIG. 1O is a perspective view of main parts showing a conventional example. 52...Upper arm bracket (first member), 20...-Vehicle body wall (second member), 28.2
9...Bolts (multiple bolts), 32.33
・・・・・・Retainer napht, 22.24・・・・・・
Bolt hole (bolt through hole), 30...Support member (accommodation chamber), 74.75...2 sides, 83.84.85.86...2 sides.

Claims (1)

[Claims] 1) Align the first member along the second member, insert a plurality of bolts through both members from the first member side to the second member side, and In the member connection structure in which the two members are connected by threading a retainer nut onto the tip of each bolt protruding from the back surface, the inner diameter of the bolt through hole of the second member substantially matches the outer diameter of the bolt, and at least A housing chamber is formed on the back surface of the second member, with a part of the wall opening wider than the retainer nuts, and the wall is stretched around the tips of the plurality of bolts, and a plurality of retainer nuts are installed in the housing chamber. A connection structure for members, characterized in that the members are accommodated in a loosely fitted state. 2) A surface that intersects diagonally with a straight line connecting the threaded hole centers of a pair of retainer nuts is formed on each opposing end of a pair of adjacent retainer nuts, and the two surfaces formed on each of the opposing ends are 2. The member connection structure according to claim 1, wherein the members are separated from each other when the retainer nut rotates during tightening.