JPS61228121A - Flanged half split plain bearing and its manufacture - Google Patents

Abstract

PURPOSE:To prevent seizure, by overlaying a lead-tin system alloy of equal kind on a bearing part and the outside surface of a flange part so as to provide the property of embedding impurity on the flange part. CONSTITUTION:The manufacturing method, interposing intermediate materials 4 between flanged half split plain bearings 1 and integrally fixing a plurality of the flanged half split plain bearings 1 by a jig, electroplates a lead-tin system alloy. In this way, the method, electrifying each flanged half split plain bearing 1, applies plating to both the internal peripheral surface of a bearing party by the lead-tin system alloy and also the outside surface of a flange part, to which the intermediate material 4 is not adapted, similarly by said alloy. Accordingly, the method, overlaying the lead-tin system alloy also on the flange part of the flanged half split plain bearing similarly to its bearing part, can display an effect for preventing seizure.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention is a flanged half-split flat bearing mainly used as a main bearing for carrots, and the flange is provided with an overlay on the bearing part and the seventh flange part. This article relates to a half-split flat bearing and its manufacturing method.

(Prior art) As shown in FIGS. 4(a) and 4(b), the flanged half-plane bearing 1 has an oil groove 2a and an oil hole 2 on the inner circumferential surface.
It consists of a bearing part 2 provided with a groove b, and a flange part 3 provided with a plurality of oil grooves 3a on its outer surface.

Then, on the right side of the bearing part 2 and on the flange part 3, a sliding bearing base metal B made of sintered steel-lead alloy is sintered or cast, and furthermore, a lead-tin alloy C is overlaid on the bearing part 2 by electroplating. (See Figure 4 (c)). The reason why the lead-tin alloy C is overlaid on the bearing part 2 is to prevent seizure by burying foreign particles that enter the oil clearance between the bearing part 2 and the shaft (not shown) in the bearing metal itself. This is to provide embeddability to the bearing portion 2 and to provide initial compatibility between the bearing portion 2 and the shaft.

In the conventional overlay method, a plurality of flanged half flat bearings 1 are stacked with their flange parts 3 in contact with each other, and electrically plated as one unit. In the split bearing 1, the lead-tin alloy C was overlaid on the bearing portion 2, but not on the flange portion 3.

(Problem to be solved by the invention) Both flanges of a flanged half flat bearing slide on the outer surface of the crank arm and receive thrust, but recently, with the increase in output of carrots such as automobile engines, As a result, the lubricating oil temperature rises, and as a result, the oil film formed on the outer surface of the flange becomes thinner than the oil groove in the flange, which may cause seizure.

(Means for Solving the Problems) The present invention addresses the above-mentioned circumstances and aims to improve the lubrication performance of the flange portion of a flanged half flat bearing.
The present invention provides a half-split flat bearing with a flange that also overlays the flange portion, and a method for manufacturing the same.

The first invention is a half-split flat bearing with a flange, which is formed by automatically laying a lead-tin alloy on the bearing alloy of the bearing part of the plain bearing. It is a half-split flat bearing.

A second aspect of the invention provides a method for overlaying a flanged half flat bearing, in which a contact piece is made of a metal with good electrical conductivity and protrudes in the axial direction of the semicylindrical body and comes into contact with the flange portion of the flanged half flat bearing. This is an overlay method for a flanged half flat bearing in which an intermediate body having a flange and a flanged half flat bearing are alternately arranged, integrally assembled, and electroplated.

(Function) In the first invention, since the bearing portion and the outer surface of the flange portion of the flanged half flat bearing are overlaid with the same type of lead-tin alloy, the flange portion also has the same embedment as the bearing portion. It improves lubrication performance and prevents seizure.

In the second invention, the contact piece of the intermediate body contacts a part of the flange part of the flanged half flat bearing, and there is a gap between most of the flange part and the intermediate body, and the intermediate body Since it is a metal with good electrical conductivity, the flanged half-flat bearings arranged alternately with the intermediate bodies can be electrically energized well. Therefore, if such an intermediate body and a flanged half flat bearing are assembled together and electroplated, most of the bearing part and the flange part are made of the same type of metal, and are electroplated at the same time, making it possible to produce an oat plated product. - be laid.

(Example) Embodiments of the present invention will be described with reference to the drawings.

Figures 1 (a) and (b) show an intermediate 4 used for electroplating to overlay the flanged plain bearing 1.
shows. The intermediate body 4 includes a body 4a formed in a semi-cylindrical shape and contact pieces 4b provided on the body 4a at appropriate intervals.

The radius r1 to the outer circumferential surface 4a' of the intermediate body is approximately equal to the outer diameter of the flange portion 3 of the flanged half flat bearing, and a plurality of contact pieces 4b protrude inwardly from the outer circumferential surface 41'.
The radial width W of the contact piece 4b is approximately equal to or smaller than the width of the flange portion 3. Both ends in the axial direction of the body portion 4a of the intermediate body are provided with chamfered portions 4C to reduce the thickness so as to reduce the width at which they abut against the outer surface of the flange portion 3, so that they abut together with the abutting pieces 4b. be.

As shown in FIG. 3, the intermediate body 4 as described above is interposed between the flanged half flat bearings 1, and
The half-split flat bearing 1 with a flange is fixed integrally with a jig C (not shown), and a lead-tin alloy is electroplated in the same manner as in the conventional method. In this way, since each of the seven flange half flat bearings 1 is energized, the inner circumferential surface of the bearing portion 2 is plated with a lead-tin alloy as in the past, and the flange portion where the intermediate member 4 is not in contact is plated with a lead-tin alloy. The outer surface of No. 3 is also plated at the same time.

FIGS. 2(a) and 2(b) show other structural examples of the intermediate body 4'.

The outer peripheral surface 4 of the semi-cylindrical body part a of the intermediate body 4'
The radius r up to 'a' is approximately equal to the outer diameter of the flange portion 3 of the flanged half plain bearing. Each 4'b is the body part 4'a
The width W is approximately equal to the width of the flange portion 3, and the outer circumferential surface 4'! It protrudes further in the inner diameter direction. Both ends of the body (m) in the axial direction are cut off, however, it is preferable that the width of the cut off is smaller.

Therefore, the intermediate body A contacts the flange portion 3 (two parts) of the flanged half flat bearing only with each contact piece 4'b.

If such intermediate bodies 4' and flanged half flat bearings 1 are arranged alternately, assembled integrally, and electroplated, the same effects as in the embodiment can be obtained.

In addition, when assembling, a chamfered portion 4c is provided on the intermediate body 4 disposed on both end sides or on the body portion 4a or 4'a which is not on the flange portion 3 side of the flanged half flat bearing of A.
There is no need to cut it off. In addition, the inner circumferential surface of the intermediate body 4a or (a and the contact piece 4b or rb)
The parts that come into contact with the plating solution may be covered with a non-conductive material such as synthetic resin to prevent them from being plated. Furthermore, the abutting piece 4b or 4'b of the intermediate body may be provided in alignment with the oil groove 3a of the flange part that does not require automatic laying. The position and number of the supports are not limited to those in this embodiment, and may be supported at three points, for example.

(Effects of the Invention) As can be understood from the above explanation, in the first invention, the flange part of the flanged half flat bearing is also automatically coated with a lead-tin alloy in the same way as the bearing part, so that the engine is Even with high output, it can improve the lubrication performance of the flange and prevent seizure.

In addition, in the second invention, by using an intermediate, the bearing part and flange part of a 7-flange half flat bearing consisting of a back plate and a plain bearing alloy are simultaneously coated with the same type of metal or alloy by electroplating. can.

[Brief explanation of drawings]

Figure 1 (0) is a front view of the intermediate body used in the ohno-lay of the 7-flange half-plane bearing according to the present invention, and Figure 1 (B) is
is a bottom view of the same, FIG. 2(A) is a front view showing another example of the structure of the intermediate, FIG. 2(B) is a bottom view of the same, and FIG. 3 is a half of the intermediate with a flange. Bottom view with plain bearing assembled, No. 4
Figure (4 is a front view of a conventional flanged half flat bearing,
Figure (B) is a bottom view of the same, and Figure 4 (G=3) is an explanatory diagram of the metal layer of the bearing portion. l: Half flat bearing with flange 2: Bearing part 3: Flange part 4.4': Intermediate body 4a, 4'a: Body part 4b, 4'
b: Contact piece 4c Two-chamfer part agent Patent attorney front 1
) Interest 2 Figure 1 Figure 2 (B) Figure 3 Figure 4 (B) (C)

Claims (1)

[Scope of Claims] 1. In a flanged half flat bearing in which a lead-tin alloy is overlaid on the bearing alloy of the bearing part of the plain bearing, the same type of lead-tin alloy is also overlaid on the outer surface of the flange part. A half-split flat bearing with a flange. 2. In the overlay method for a flanged half flat bearing, an intermediate body is made of a metal with good electrical conductivity and has a contact piece that protrudes in the axial direction of the semicylindrical body and comes into contact with the flange part of the flanged half flat bearing. An overlay method for a flanged half flat bearing, characterized in that the flanged half flat bearings are alternately arranged, integrally assembled, and electroplated.