JPH0312466Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" This invention relates to a connection bracket used for a connection between a push rod of a force generating device and an operating pedal.

``Prior Art'' Conventionally, a connection bracket as shown in Fig. 1 is often used at the connection between the push rod and the operating pedal of force generating devices such as vacuum boosters, master cylinders, and clutch cylinders. , this connecting bracket B consists of a U-shaped bracket main body 1 (see Fig. 4) in which a pair of joint plates are integrally connected at the crotch part, and a nut 2 welded to the outer surface of the crotch part of this bracket main body 1. consists of the bracket body 1
is rotatably connected to the operating pedal 3 by a shaft 3a passing through the joint plate with a part of the operating pedal 3 being sandwiched as shown in FIG. It is screwed to the tip of a push rod 4a of a force generating device 4 such as a force device, and transmits the movement of the operating pedal 3 to the force generating device 4.

In this case, when attaching the nut 2 to the bracket body 1, in order to ensure sufficient attachment strength in the axial direction and in the direction orthogonal to the axis in relation to the force applied to the operating pedal 3, conventional methods are used. The entire circumference of the nut 2 is welded to the bracket body 1 using means such as argon welding.

``Problems to be Solved by the Invention'' However, there are problems in that welding the entire circumference of the nut 2 takes time and is disadvantageous in terms of workability. In particular, in the case of the bracket body 1, both edges of the crotch part are cut, so the dimensions between them can be strictly regulated, whereas the dimensions between the joint plates are subject to dimensional errors in the bent part between them and the crotch part. Therefore, if a part of the nut 2 is placed on the curved surface of the bent part,
It will be difficult to weld that part.

This idea was made in view of the above circumstances,
It is possible to quickly weld the nut to the bracket body, increasing production efficiency, and
An object of the present invention is to provide a connection bracket with high nut mounting strength.

``Means for Solving the Problems'' The connecting bracket of this invention is a bracket formed by bending a pair of mutually parallel joint plates supported by an operating pedal and a crotch portion between the two joint plates. It consists of a main body and a hexagonal nut that is attached to the outer surface of the crotch part of the bracket main body and fixes the push rod in a screwed state. The nut has a hexagonal protrusion welded to the bracket body on its back surface, which is integrally formed with the screw hole in the center, and a pair of parallel two sides of the hexagonal shape of the protrusion are in the width direction of the bracket body. It is characterized in that it is welded inside both side edges parallel to the side edges.

``Function'' The connecting bracket of this invention has a hexagonal protrusion on the hexagonal nut, and the two parallel sides of the protrusion are welded parallel to both side edges of the bracket body. Even if the hexagonal nut is placed on the curved surface of the bent part between the
The hexagonal corners of the protrusion will be placed on the curved surface. Therefore, even if this corner cannot be welded, welding can be ensured at least between the two sides and most of the other four sides continuous from both ends at different angles.

Looking at this with respect to the bracket body, it is possible to make the dimension between both joint plates at the crotch as small as possible, by making the width dimension of the bracket body smaller than the diameter of the external connection port of the hexagon nut In addition to setting the overall width dimension to the maximum dimension of the hexagonal nut, the overall size can be reduced.

"Example" This invention will be explained below with reference to the drawings.

2 to 6 show one embodiment of this invention, and parts that are the same as those of the conventional example shown in FIG. 1 are given the same reference numerals, and their explanations will be simplified or omitted. In the figure, numeral 5 indicates a hexagonal nut welded to the outer surface (flat surface) 1c of the crotch portion 1b of the bracket main body 1 having a substantially U-shape. At the six corners of one end surface (fixing surface) 5a of this hexagonal nut 5, the end surface 5a
radially surrounding the center of the projections 5b, each of which is linear and has a trapezoidal cross section, connects both ends of each projection 5b to the end surface 5.
The six protrusions 5b are formed to form a regular hexagon by reaching the periphery of the protrusions 5b and bringing the ends of adjacent protrusions 5b into contact with each other. Furthermore, a circumferential protrusion 5c taller than the protrusion 5b is formed at the screw hole opening of the end face 5a of the hexagonal nut 5. The bracket main body 1 is formed by bending a plate material, and its crotch portion 1b has a rectangular shape, and a joint plate 1a is provided on its short side (the short side when looking at the crotch portion 1b from above). , 1a are provided, and the length of this short side is greater than the length from the tip of one corner of the hexagonal nut 5 to the tip of the other corner opposite to this corner (diameter of the circumscribed circle). It has been slightly shortened. Furthermore,
A peripheral protrusion 5 of a hexagonal nut 5 is provided at the center of the crotch portion 1b.
protrusions 5b, 5b larger than the outer diameter of c and facing each other;
A through hole 1d having an inner diameter smaller than the interval between the two is formed.

Then, the hexagonal nut 5 is attached to the through hole 1d of the crotch portion 1b by inserting the peripheral protrusion 5c into the through hole 1d of the crotch portion 1b, and attaching each protrusion 5b to the through hole 1d of the crotch portion 1b by a well-known projection welding method.
It is fixed to the bracket main body 1 by welding to the flat surface 1c around d. In this case, as shown in FIG.
A pair of parallel two sides of b are welded parallel to both side edges of the crotch portion 1b.

Next, the operation of this device configured as described above will be explained.

There are six protrusions 5b on the hexagonal nut 5, and since almost the entire circumference of the hexagonal nut 5 is welded to the bracket body 1, the welding strength is high. Also, hexagonal nut 5
When attaching, it is best to perform protrusion welding on each protrusion 5b. Since projec- tion welding allows all protrusions 5b to be welded at the same time, the welding process is much shorter than conventional argon welding all around. Complete. Therefore, production efficiency can be increased.

By the way, when actually welding the protrusions 5b by the protrusion welding method, it is possible that not all the protrusions 5b can be welded due to the conditions of the welding machine or the workplace, resulting in one or two protrusions 5b being poorly welded. Here, for example, even if two protrusions 5b fail to weld and only four protrusions 5b are welded, the bracket body 1 of the hexagonal nut 5
The mounting strength for this will be a sufficiently high value. This is because even if two of the six protrusions 5b are poorly welded, when looking in the vertical and horizontal directions along one end surface 5a of the hexagonal nut 5, two or more protrusions 5b are always attached to the crotch part 1b.
This means that even if a load is applied to the hexagonal nut 5 two-dimensionally along the end surface 5a of the hexagonal nut 5, two or more welded parts along the direction in which the load is applied will support this load. be. That is, according to this invention, even if one or two welding failures occur, the fixing strength of the hexagonal nut 5 can be maintained at a sufficiently high value, making it easier to manage the welding work. Note that if a hexagonal nut is provided with protrusions at three locations, even if a welding failure occurs in one location, depending on the direction of the load, there will only be one welded section along the direction of the load, so sufficient fixation will be achieved. It becomes impossible to ensure strength.

In addition, in recent years, the size of the bracket body has been reduced in line with the reduction in weight of vehicle bodies, and the length of the short side of the crotch portion 1b of the bracket body 1 of this embodiment is also slightly larger than the maximum outer diameter of the hexagonal nut 5. It has been shortened as shown in Figure 3. On the other hand, it is desirable to make the length of the long side of the crotch portion 1b, in other words, the length between the two joint plates 1a, as short as possible, but the width dimension (length of the short side) of the crotch portion 1b is not processed by cutting. In order to
Although it can be strictly regulated, the length between the joint plates 1a is influenced by the dimensional error of the bent part between the joint plates 1b and the error becomes large. Therefore, when the protrusion 5b of the hexagonal nut 5 is placed on the curved surface of the bent part,
There may be cases where that part is not welded, but since the two parallel protrusions 5b are arranged parallel to both side edges of the crotch part 1b as described above, the protrusions 5b are not welded at the bent part.
The corner of the hexagon b will be placed. Therefore, even if some of the corners cannot be welded, most of the other parts can be welded, and the fixing strength of the hexagonal nut 5 will be sufficiently high. Incidentally, if three protrusions are formed on the hexagonal nut,
It is necessary to position the hexagonal nut so that none of these three protrusions protrude from the crotch portion 1b, but with the hexagonal nut 5 of this invention, as described above, most of the protrusions 5b are reliably attached to the bracket body 1. It is welded to the flat surface 1c to securely fix the hexagonal nut 5.

Note that the circumferential protrusion 5c of the hexagonal nut 5 is the protrusion 5b.
This is formed to prevent the melted protrusion 5b from flowing into the through hole 1d during welding, and to prevent the melted protrusion 5b from reaching the screw hole of the hexagonal nut 5. Furthermore, the outer diameter of the circumferential protrusion 5c is adjusted to the through hole 1d.
The reason why the circumferential protrusion 5c is made smaller than the inner diameter of the bracket body 1 is because the circumferential protrusion 5c is made smaller than the inner diameter of the bracket body 1 during profile welding of the protrusion 5b.
This is to avoid problems such as insufficient welding of the protrusions 5b due to the decrease in the current flowing to the protrusions 5b when the current flowing through the circumferential protrusions 5c increases. Avoid touching 1.

"Effects of the Invention" As explained above, the connecting bracket of this invention provides the following effects.

(i) Arrange the two parallel sides of the hexagonal protrusion parallel to both side edges of the bracket body, with the hexagonal corner facing the bend between both joint plates and the crotch of the bracket body. Therefore, even if the corner portion is located on the curved surface of the bent portion and cannot be welded, most of the other portions can be welded, so that it can be securely and firmly fixed.

(ii) The overall width dimension was set to the maximum diameter of the circumscribed circle of the hexagonal nut, and even if the protrusion of the hexagonal nut was placed on the curved surface of the bent part of the bracket body, most of the other welding was ensured. Therefore, the size between the bent portions can be made as small as possible, and the overall size can be reduced.

(iii) By welding each protrusion to the bracket body at the same time, the welding work can be completed instantly and production efficiency can be increased.

[Brief explanation of the drawing]

Fig. 1 is a side view showing an example of a conventional connection bracket, Figs. 2 to 6 show an embodiment of this invention, Fig. 2 is a side view, and Fig. 3 is a front view of the connection bracket. , FIG. 4 is a plan view of FIG. 3, FIG. 5 is a view showing the fixing surface of the nut, and FIG. 6 is a sectional view of the crotch portion of the nut and the bracket body. 1...Bracket body, 1a...Joint plate, 1b
...crotch, 1c...outer surface (flat surface), 5...hexagonal nut, 5a...end surface, 5b...protrusion.

Claims (1)

[Scope of utility model registration request] A connecting bracket that connects a push rod that drives a force generating device and an operating pedal that presses the push rod, comprising a pair of mutually parallel joint plates supported by the operating pedal and a crotch portion between these joint plates. and a hexagonal nut that is attached to the outer surface of the crotch part of the bracket body and fixes the push rod in a screwed state. It is set smaller than the diameter of the circumscribed circle of the nut, and the hexagonal nut has a
The protrusion to be welded to the bracket body is integrally formed in a hexagonal shape centered on the screw hole, and a pair of parallel two sides of the hexagonal shape of the protrusion are on the inner side of both widthwise edges of the bracket body. A connecting bracket for a force generator, characterized in that it is welded parallel to the edge.