JP2004116700A - Mounting part for hydraulic shock absorber - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mounting part for a hydraulic shock absorber allowing easy recognition of whether or not a mounting eye is welded and fixed to an accurate position with respect to a hydraulic shock absorber body lower end part or a piston rod tip. <P>SOLUTION: In the mounting part for the hydraulic shock absorber provided with the annular mounting eye 5 comprised by rolling a plate material, an annular inner cylinder arranged in an inner side of the mounting eye 5, and a rubber bush 7 fit in between them, a joint portion of the mounting eye 5 is welded and fixed to the hydraulic shock absorber body lower end part or the piston rod tip. One or more recessed parts 10 is provided in an outer circumferential face of the mounting eye 5 that is a portion easily seen from the outside in a welded and fixed state of the mounting eye 5. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a mounting portion welded and fixed to a lower end portion of a shock absorber main body or a tip end portion of a piston rod in a hydraulic shock absorber used for a suspension device of a vehicle such as an automobile, and more specifically, formed by rolling a plate material. The present invention relates to a structure of a plate-wound mounting eye.
[0002]
[Prior art]
2. Description of the Related Art A hydraulic shock absorber used for a suspension device of a vehicle such as an automobile is provided with a mounting portion at a lower end portion of the hydraulic shock absorber main body or a tip end portion of a piston rod as a mounting means to an axle or another member such as a vehicle body.
[0003]
The mounting portion is composed of an annular mounting eye, an inner cylinder disposed inside the mounting eye, and a rubber bush fitted between them, and a lower end of the hydraulic shock absorber main body or a piston. The hydraulic shock absorber is fixedly welded to the rod tip, and the hydraulic shock absorber is attached to another member by inserting a connecting member such as an axle or a connecting shaft into the inner cylinder.
[0004]
The mounting eye that forms the mounting portion is generally formed by one of a method of cutting a long pipe into a predetermined width and a method of forming a plate material by rolling. It is a target.
[0005]
However, when the method of (1) is adopted, there is a problem that the man-hour for cutting a long pipe is increased, and when the method of (2) is adopted, the seam alignment work at the time of welding is troublesome and automatic welding is performed. There is a problem that is difficult.
[0006]
Therefore, an example disclosed in Patent Literature 1 can be exemplified as an improvement over these problems.
[0007]
That is, a mounting eye is formed by rolling a plate material, and a sensor for detecting a seam between the plate materials generated at the time of the roll processing is provided for a device for welding the mounting eye to the hydraulic shock absorber, and a detection signal from this sensor By this, the seam alignment at the time of welding is automated.
[0008]
[Patent Document 1]
Japanese Utility Model Publication No. 60-25342 [0009]
[Problems to be solved by the invention]
However, the configuration of the technique disclosed in Patent Document 1 has the following problems.
[0010]
That is, the sensor detects a joint portion of the mounting eye, locates the joint portion at, for example, a joint portion at a lower end portion of the main body of the hydraulic shock absorber, and welds and fixes the two using electric resistance welding.
[0011]
At this time, since the mounting eye has the same shape at the entire circumference except for the joint portion, it can be confirmed from the appearance of the hydraulic shock absorber in a state where the mounting eye is bonded whether the mounting eye is correctly bonded at a predetermined position. Difficult to do.
[0012]
Also, on the welding device, for the same reason as described above, when the joint portion of the mounting eye is directed toward the lower end of the main body of the hydraulic shock absorber, it can be determined whether the joint portion is accurately positioned at a predetermined position. Hateful.
[0013]
Therefore, an object of the present invention is to provide a mounting portion of a hydraulic shock absorber that can easily recognize whether or not a mounting eye is welded and fixed at an accurate position with respect to a lower end portion of a hydraulic shock absorber main body or a tip end portion of a piston rod. is there.
[0014]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides an annular mounting eye formed by rolling a plate material, an annular inner cylinder arranged inside the mounting eye, and a rubber fitting inserted between these. The bush of the hydraulic shock absorber main body, or at the mounting portion of the hydraulic shock absorber where the joint of the mounting eye is welded and fixed to the tip of the piston rod, with the mounting eye being welded and fixed One or more position recognizing means are provided on the outer peripheral surface of the mounting eye, which is a portion easily visible from the eye.
[0015]
Further, the position recognizing means may be provided on the outer peripheral surface opposite to the joint portion of the mounting eye by 180 degrees.
[0016]
Further, the position recognition means may be a hemispherical concave portion.
[0017]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment in which the present invention is embodied in a mounting portion of a return cylinder type hydraulic shock absorber used for a suspension device of an automobile will be described with reference to the drawings.
[0018]
FIG. 1 shows a lower portion of a hydraulic shock absorber main body. A lower cap 3 is fitted to a lower end portion of an outer shell 2 constituting the hydraulic shock absorber main body 1 and both are liquid-tightly joined by seam welding. ing.
[0019]
A mounting portion 4 having a ring shape as a whole is fixed to the lower surface of the lower cap 3 by welding, and the hydraulic shock absorber is connected via the mounting portion 4 and the tip of a piston rod (not shown) extending from the hydraulic shock absorber main body 1. Is mounted between the axle side and the vehicle body side as a vehicle suspension device.
[0020]
The mounting portion 4 includes an annular mounting eye 5, an inner cylinder 6 disposed inside the mounting eye 5, and a bush 7 made of natural or synthetic rubber inserted between them. A connecting member such as an axle or a connecting shaft is inserted into the cylinder 6.
[0021]
As shown in FIG. 2, the mounting eye 5 is formed by rolling a plate material, and butted so that only an inner edge 8 a of a joint end portion 8 of the plate material to be a seam portion is in a contact state. A groove 8b having a substantially V-shaped cross section is formed on the outer peripheral side of the portion.
[0022]
The V-shaped groove 8b may be formed by chamfering only the outer edge of the joint end portion 8 of the plate material serving as a joint.
[0023]
The V-shaped groove 8b is used for position detection by an optical sensor, a magnetic sensor, and the like during welding work, and the V-shaped groove 8b contacts a bowl-shaped projection (projection) 9 formed in the lower cap 3. The mounting eye 5 and the lower cap 3 are welded and fixed by electric resistance welding.
[0024]
In this state, so-called gas shield welding may be performed between the lower cap 3 and the mounting eye 5 as reinforcement welding in a shield gas atmosphere such as carbon dioxide gas or metal argon gas.
[0025]
Also, since the inner edge 8b of the joint end portion 8 in the mounting eye 5 is in surface contact with the entire width direction, a spatter or the like during welding passes through the joint gap to the inner peripheral surface of the mounting eye 5. It does not adhere.
[0026]
Therefore, when the manufacturing process of fitting the bush 7 on which the inner cylinder 6 is mounted after welding and fixing the mounting eye 5 to the hydraulic shock absorber main body 1 is employed, the spatter and the like may hinder the fitting process. Not to be.
[0027]
As shown in FIGS. 2 and 3, a hemispherical concave portion 10 is formed on the outer peripheral surface of the mounting eye 5 opposite to the V-shaped groove 8b by 180 degrees as the position recognition means of the present invention.
[0028]
The recess 10 is provided so that it can be easily determined from the appearance whether the mounting eye 5 is accurately welded and fixed to a predetermined position at the lower end of the hydraulic shock absorber main body 1.
[0029]
That is, since the V-shaped groove 8b used for the position detection is disposed at a portion facing the lower cap 3, the appearance of the mounting eye 5 is fixed to the lower cap 3 by welding. Since the V-shaped groove is difficult to see, the concave portion 10 is provided on the outer peripheral surface of the mounting eye 5 opposite to the V-shaped groove 8b by 180 degrees.
[0030]
The recess 10 may be provided in advance on the plate material or may be provided after the roll processing.
[0031]
As described above, according to the present embodiment, since the concave portion 10 having a hemispherical shape is formed on the outer peripheral surface opposite to the V-shaped groove 8b of the mounting eye 5 by 180 degrees, the position of the concave portion 10 can be visually confirmed. If the mounting eye 5 is accurately welded and fixed to a predetermined position at the lower end of the hydraulic shock absorber main body 1, it can be easily determined from the appearance.
[0032]
Therefore, it is possible to easily identify a non-defective product or a defective product when welding the mounting eye 5 to the lower cap 3 or when completing the product.
[0033]
If the position of the concave portion 10 is the outer peripheral surface opposite to the V-shaped groove by 180 degrees, this portion is just on the axis of the piston rod and the hydraulic shock absorber main body 1, so that the mounting eye 5 can be intuitively sensed. Is easily recognized.
[0034]
Further, since the concave portion 10 having a hemispherical shape is used as the position recognizing means, the position can be easily confirmed not only visually but also by touching with a hand.
[0035]
In addition, a more accurate determination can be made by using a jig or the like at the time of visually confirming the position.
[0036]
The present invention is not limited to the above-described embodiment, and can be embodied with the following modifications, for example.
[0037]
1) In this embodiment, the hemispherical concave portion 10 is provided as the position recognizing means of the present invention. However, the present invention is not limited to this concave portion, and may be a convex portion, a cross groove, or a seal-like mark.
[0038]
2) In this embodiment, the concave portion 10 as the position recognition means of the present invention is provided on the outer peripheral surface opposite to the V-shaped groove 8b of the mounting eye 5 by 180 degrees, but is not limited to this position. Instead, for example, it may be provided at a site or the like opposite to the V-shaped groove by 90 degrees.
[0039]
3) In this embodiment, only one recess 10 is provided, but the present invention is not limited to this, and two or more recesses 10 may be provided.
[0040]
4) In this embodiment, the present invention is embodied as a return cylinder type hydraulic shock absorber. However, the present invention is not limited to this, and may be embodied as a single cylinder type hydraulic shock absorber.
[0041]
In the present embodiment, the mounting eye 5 is welded and fixed to the lower end portion 1 of the hydraulic shock absorber main body. However, the present invention is not limited to this. The mounting eye 5 may be embodied by welding the mounting eye 5 to the tip end of the piston rod. .
[0042]
【The invention's effect】
According to the present invention, the following effects can be obtained.
1) According to the first aspect of the invention, when the mounting eye is welded and fixed to the lower end portion of the hydraulic shock absorber main body or the distal end portion of the piston rod, it is easy to visually check whether the mounting eye is accurately welded and fixed at a predetermined position. Therefore, it is possible to easily identify a non-defective product or a defective product when welding the mounting eye or when the product is completed.
[0043]
2) According to the second aspect of the present invention, if the position recognizing means is provided on the side opposite to the joint by 180 degrees, this portion is just on the axis of the piston rod and the hydraulic shock absorber main body. Eye shift is easy to recognize.
[0044]
3) According to the third aspect of the present invention, since the position recognition means is formed as a hemispherical concave portion, the position can be easily confirmed not only visually but also by touching with a hand.
[Brief description of the drawings]
FIG. 1 is a side view showing a mounting portion of a hydraulic shock absorber according to an embodiment of the present invention.
FIG. 2 is a front view showing a state in which an inner cylinder and a bush are removed in FIG.
FIG. 3 is a longitudinal sectional view in FIG.
[Explanation of symbols]
4 mounting part 5 mounting eye 6 inner cylinder 7 bush 10 recess (position recognition means)

Claims (3)

It is composed of an annular mounting eye formed by rolling a plate material, an annular inner cylinder disposed inside the mounting eye, and a rubber bush fitted between these. In the mounting portion of the hydraulic shock absorber in which the joint portion of the mounting eye is welded and fixed to the end of the piston rod, the outer periphery of the mounting eye is a portion that is easily visible from the outside in a state where the mounting eye is welded and fixed. A mounting portion for a hydraulic shock absorber, wherein one or more position recognition means are provided on the surface. The mounting portion of the hydraulic shock absorber according to claim 1, wherein the position recognizing means is provided on an outer peripheral surface opposite to a joint portion of the mounting eye by 180 degrees. The mounting portion of the hydraulic shock absorber according to claim 1, wherein the position recognition unit is a hemispherical concave portion.

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