JPS63219424A - Integral type engine mount bracket - Google Patents

Abstract

PURPOSE:To eliminate all welding works and to improve productivity and strength, by a method wherein a collar part and an arm part are integrally molded by a press work, the collar part forms a double cylinder part, and an outer cylindrical part is continuous to the arm part. CONSTITUTION:A collar part 11 in which the insulator of a bracket is pressed is formed by throttle molding by means of a press. An inner cylinder part 11A, an outer cylinder part 11B provided at its lower edge with a flange 11C, and an annular curved folded part 11D through which the upper peripheral edges of the inner and the outer cylinder parts are smoothly coupled to each other, are respectively provided. An arm part 13 is also formed by throttle molding, and a flat mounting surface 13A, in which a bolt hole 13D is bored, and a peripheral edge folded part 13B, standing upright from a mounting surface and provided at its lower edge with a flange 13C, are respectively provided. The flanges 11C and 13C are continuous to each other in a manner to be positioned flush with each other, and the two terminal ends of the peripheral edge folded part 13B are smoothly connected to the outer cylinder 11B.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field 1] The present invention relates to an engine mount bracket for a vehicle.

[Prior Art] Generally, an engine mount is used to support a power plant including an engine mounted on a vehicle via an elastic body, and to prevent vibrations caused by the engine from being transmitted to the vehicle body.

There are various types of engine mount brackets in which such an elastic body is interposed, and for example, the one shown in FIG. 4 is conventionally known.

In the figure, reference numeral 1 denotes a collar formed by cutting a steel pipe or rolling a plate material, and an elastic insulator 2 is press-fitted inside this collar. Reference numeral 3 denotes an arm formed by drawing or the like, and has a substantially flat mounting surface 3^ and a peripheral bent portion 3B standing up on its periphery. And mounting surface 3
8 is a bolt hole 3 for attaching the arm to the engine.
C is provided. Therefore, a batch plate 4 for reinforcement is installed and welded to the upper opening of the arm 3 at the peripheral bent portion 3B, and this arm 3 is applied to the outer peripheral side of the collar 1, and the four peripheral sides are welded. This constitutes the engine mount bracket.

[Problems to be Solved by the Invention] However, in such a conventional engine mount bracket, the collar 1 and the arm 3 are all connected by arc welding, so there is a problem that there are many welding points and workability is poor. was there.

In addition, the bending rigidity resistance against human bending force caused by engine vibration or vehicle acceleration/deceleration must be shared only by arc welding, and the corners at both ends of the four-sided welding points cannot be arc welded. Therefore, it is particularly vulnerable to bending input in the direction perpendicular to the mounting surface 3A, that is, in the axial direction of the collar 1, and there is a problem in that concentrated stress occurs in the area indicated by arrow A in the figure, and cracks are likely to occur in the armpit area. .

The purpose of the present invention is to solve these conventional problems and provide an engine mount bracket that does not require welding, improves workability and reduces costs, has excellent strength, and is easy to mold. It is about providing.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides an engine mount bracket consisting of a collar portion into which an insulator is press-fitted and an arm portion having a mounting surface. It is characterized in that it is integrally molded by press working, and the collar part has a double cylindrical shape, and the outer cylindrical part is continuous with the bowl-shaped arm part.

[Function J According to the present invention, the collar portion and the arm portion are integrally formed by press working. The collar part has a double cylindrical shape, and the outer cylindrical part is continuous with the bowl-shaped arm part, making it easy to form and making the bracket strong enough to withstand human bending force. This is achieved by the member itself, and sufficient strength is ensured.

Further, since the collar portion has a double cylindrical shape, an elastic effect is produced between the inner cylinder and the outer cylinder, and this, together with the elastic effect of the insulator, provides a good vibration-proofing effect.

[Example] Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is an external perspective view showing an embodiment of the present invention, and FIG.
The figure is a sectional view taken along the line XX.

Reference numeral 11 denotes a collar portion formed by drawing with a press, and includes an inner cylindrical portion 11A, and an outer cylindrical portion whose height ■ is 1/2 to 2/3 of the height ■ of this inner cylinder portion 11A. 11B
, it has a flange 1IC1 at the lower edge of the outer cylindrical part 11B and an annular curved folded part 11D that smoothly connects the upper end periphery of the inner cylindrical part 11A and the upper end periphery of the outer cylindrical part 11B.

Reference numeral 13 designates an arm portion which is also formed into a bowl shape by drawing, and includes a substantially flat mounting surface 13^, a peripheral bent portion 13B that stands approximately perpendicular to this mounting surface 13A, and a peripheral bent portion 1.
Flange 13C and mounting surface 13 provided on the lower edge of 3B
It consists of a bolt hole 130 drilled at A. The flange 13G is the outer cylindrical portion 11B of the collar portion 11 described above.
The outer cylindrical portion 1 of the collar portion 11 is continuous with the lower end flange LLG as much as possible, and both end portions of the peripheral bent portion 13B are connected to the outer cylinder portion 1 of the collar portion 11.
It continues smoothly with 1B.

Reference numeral 15 denotes a neck portion existing between the collar portion 11 and the arm portion 13, and the curved folded portion 1 of the collar portion 11 described above.
1D and a ridge 15A that smoothly continues with the mounting surface 13^ of the arm portion 13, and a side wall portion 15 that is approximately perpendicular to this ridge 15A.
It consists of shelf portions 15G, 15G that connect B, 15B, side wall portion 15B, and upper edges of both end portions of peripheral bent portion 13B that smoothly continues with outer cylinder portion 11B of collar portion 11 described above.

This neck portion 15 facilitates press molding and serves to reinforce the entire bracket.

Next, an example of the molding process of the engine mount bracket according to the present invention will be explained using the schematic diagram shown in FIG. 3.

First, a part of the blank plate in Figure 3 (2)
As shown in ), perform rough forming by slightly raising the shape using draw forming. Then, as shown in (3), the cylindrical portion A, the neck portion B, and the bowl-shaped portion C are roughly formed by drawing. Then (
As shown in 4), the cylindrical part is made into a double cylindrical shape by reverse draw molding so that the central part protrudes in the opposite direction. After that, (5)
Holes are made in the bottom surface and mounting surface of the inner cylindrical part by the trim piercing molding shown in (6), and the flange end is trimmed at the same time, and in (6), the final outer shape is shaped by restriking molding and the inner cylindrical part 11A is shaped. Set the inner diameter dimension.

The engine mount bracket formed as described above has an inner cylindrical portion 11A as shown in FIGS. 1 and 2.
The insulator 17 is press-fitted into the arm portion 13 and attached to the vehicle body side via a bracket (not shown).
is attached to the engine by inserting a bolt into the bolt hole 13D of the mounting surface 13A.

In this example, since the upper end periphery of the inner cylindrical portion 11A is smoothly continuous with the annular curved folded portion 110, it acts as a guide means when press-fitting the insulator 17, and the engineering work can be easily performed. be exposed.

In addition, in response to a bending force input due to engine vibration or acceleration/deceleration of the vehicle, that is, a force in the axial direction of the collar portion 11, an external force is first applied from the arm portion 13 to the collar portion 1.
1, and is transmitted through the curved folded part 110, the inner cylinder part 11A5, and the insulator 17, so that an elastic action exists between the inner cylinder part 11A and the outer cylinder part 11B. In combination with the elastic action of the insulator 17, a good vibration damping action can be obtained.

In this way, a strong engine mount bracket can be obtained only by press forming without any welding.

In manufacturing the engine mount bracket according to the present invention, the plate material is preferably a steel material having a thickness of about 2 to 3 mm from the viewpoint of required strength and formability.

[Effects of the Invention] As is clear from the above description, according to the present invention, the welding operation of cutting is not required, so productivity can be greatly improved, although there is a slight increase in the number of pressing steps. Also,
Since the collar part has a double cylindrical shape, it has the effect that press molding can be easily performed while sufficiently satisfying strength.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of the present invention, and FIG.
- An X-ray sectional view, FIG. 3 is a schematic diagram showing an example of the molding process of the embodiment, and FIG. 4 is a perspective view showing a conventional example. Work 1... Collar part, 11A... Inner cylinder part, 11B... Outer cylinder part, 13... Arm part, 13A... Mounting surface, 13B... Peripheral bent part, 15...・Neck part. Figure 1 ++D Exterior view of Figure 1 on the x-X line Figure 2 (1) □

Claims (1)

[Claims] In an engine mount bracket consisting of a collar portion into which an insulator is press-fitted and an arm portion having a mounting surface, the collar portion and the arm portion are integrally molded by press working, and the collar portion is separated into two parts. An integrated engine mount bracket characterized by having a heavy cylindrical shape and having an outer cylindrical part continuous with a bowl-shaped arm part.