JPS61233214A - Torque rod - Google Patents

Abstract

PURPOSE:To reduce the manufacturing cost of torque rod by integrally forming eye sections of specific inner diameter at the opposite end sections of a steel plate then pressure inserting rubber bushes into respective eye section. CONSTITUTION:Eye sections 2 having desired inner diameter are formed at the opposite end sections of a steel plate 1. A restricting jig 6 having an opening of funnel type cross-section is arranged on the small diameter section at the end of the inner diameter section of the eye section 2. Furthermore, a rubber bush 7 is placed at the large diameter section at the outside of said jig 6 then pressure inserted into the inner diameter of the eye section 2 to squeeze the rubber bush 7 while to joint firmly against the inner face of the eye section 2. With such structure, the manufacturing cost of torque rod can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a torque rod used in suspensions of large trucks, link parts of general machinery, and the like.

Conventional Problem 1 and Disclosure Conventionally, this type of torque rod has generally been manufactured by the following method. In other words, (1) casting the main body → cutting the inner diameter of the eyepiece on both ends → press-fitting the drawn rubber bushing into the inner diameter of the eyepiece (2) forging the eyepiece → welding the eyepiece to the limbus pipe →
Cutting the inner diameter of the eyeball → Press-fitting the drawn rubber bushing into the inner diameter of the eyeball (3) Forging the eyeball → Cutting the inner diameter of the eyeball → The upper part of the glaze or hole formed in the eyeball The shaft pipe material is firmly attached and fixed by tightening → Press-fitting the drawn rubber bushing into the inner diameter of the eyepiece (4) Welding various pre-formed press sheet metal members to create a torque rod shape Then, press-fit a drawn rubber bushing into the inner diameter of the centerpiece of those members.

However, each of these conventionally known methods has the following drawbacks. That is, ^, (1) and (
Depending on the method in 4), it may not be possible to handle torque rods of different quality.B. Depending on the methods in (2) and (3), special equipment may be required for aligning the phase of the eyeballs, caulking, etc. Requirements C: All methods (1) to (4) require machining of the inner diameter of the eye and a pre-drawn rubber bushing, which increases production costs. .

Therefore, in view of the above-mentioned drawbacks in the conventionally known torque loft manufacturing methods, the present invention has been devised to provide a novel method that is easy to manufacture and inexpensive to manufacture. Its purpose is to obtain a torque rod.

In order to achieve this object, the present invention integrates eye portions with a required inner diameter at both ends of a steel plate material having a predetermined thickness and width and a required length. The inner diameter of each centerpiece is narrowed down to the required durability, rigidity,
It is characterized by a torque rod formed by press-fitting a rubber bushing having an outer diameter that can secure the extraction load.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to FIGS. 1 to 7 of the accompanying drawings showing embodiments thereof.

First, as shown in FIG. 1, a steel plate material as a material 1 having a required width B and thickness L is cut into a length 1 between a and the required torque rod. 1, a center part 2 having an inner diameter of a desired size is formed by hot working or cold working (see FIG. 2), and then a third
As shown in the figure, each end of the blank 1 is welded to the main body of the blank 1 at the center point 2 (the weld is indicated by 3), and then as shown in Figures 4 and 5. The mutually opposing outer peripheries of both centerpieces 2 are defined by the width B of the material 1.
They are connected to each other by rectangular plate-shaped steel reinforcing members 4 so as to include the center line in the direction, and the peripheral sides touching the material 1 are joined by welding to the main body part of the material 1 and the outer periphery of the eyepiece part 2. Finally, as shown in FIG. 6, an opening having a morning glory-shaped longitudinal section is made on the end of the inner diameter part of the eyeball part 2 coaxially therewith. The provided drawing jig 6 is installed at its small diameter part, and is placed on the outer large diameter part of this jig 6 to provide the required durability and rigidity when drawn to the inner diameter part of the eyeball part 2. , inner cylinder baked type or inner/outer baked type rubber with outer diameter dimensions that can secure extraction load, etc.
Place the bushing 7 coaxially in the longitudinal direction, press fit this rubber bushing 7 into the inner diameter of the eyeball part 2 in the direction of the axis of the eyeball part 2 (in the direction of arrow X), and squeeze the rubber bushing 7. It is firmly bonded to the inner surface of eyeball 2. In this way, tA7
As shown in the figure, a completed torque rod 1o is obtained.

Note that the rubber bush 7 used in the present invention is not limited to the above-mentioned type, and may be of a shaft-rotating type.

In this way, according to the present invention, the torque rod 10 using a steel plate material as the material 1 and having the required eye portions 2 at both ends thereof and the rubber bushing 7 within its inner diameter can be easily completed. It happens.

Since the present invention has the above-mentioned tM structure and action, it is clear that it has the following excellent effects. In other words, (1) torque rods of different lengths can be easily accommodated by selecting the required steel plate material as the material; (2) the inner diameter of the centerpiece does not require machining;
The overall manufacturing cost can be reduced. (3) Since the rubber bushing is squeezed when it is press-fitted into the inner diameter of its eye, the squeezing process that was previously required can be omitted. (4) The shape and dimensions of the thin steel reinforcing material placed in the shadow of both center portions of the ring, which is the main body of the material, must be appropriately selected. Therefore, the buckling rigidity can be easily changed.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing a steel plate material, which is the main material used in the present invention, Fig. 2 is a perspective view showing the steel plate with eyelets formed at both ends, and Fig. 3 shows the eyelet and FIG. 4 is an enlarged front view showing the welded part between the material and the material, FIG. 4 is a front view showing the intermediate product shown in FIG. 2 with thin steel reinforcement attached, and FIG. FIG. 6 is a partially cutaway side view showing the rubber bushing being press-fitted into the intermediate product shown in FIG. 4, and FIG. 7 is a perspective view showing the finished product. 1...Material, 2...Eye part, 3, 5...Welding part,
4...Reinforcement wire, rubber bushing...

Claims (1)

[Scope of Claims] 1. Eyes having a required inner diameter are integrally formed at both ends of a steel plate material having a predetermined thickness and width and a required length, and the inner diameter of each eye, A torque rod characterized by being formed by press-fitting a rubber bushing having an outer diameter that can secure required durability, rigidity, extraction load, etc. by narrowing the inner diameter. 2. A rectangular steel reinforcing plate is placed on one side of the steel plate perpendicularly to the plate surface and along its length so as to connect the eyelets formed at both ends of the steel plate, The torque rod according to claim 1, wherein the reinforcing plate material is firmly connected to the plate surface and the center portion of the steel plate material. 3. The torque rod according to claim 1, wherein the steel reinforcing plate material is arranged along the center line of the width of the steel plate material. 4. The torque rod according to claim 1, 2 or 3, wherein the rubber bushing is an inner-cylinder baked-in type or an inner-outer cylinder baked-in type rubber bush. 5. The torque rod according to claim 4, wherein the rubber bushing is of a rotating type.