JPS6090976A - Synthetic resin cleaner case of air cleaner for engine - Google Patents

Abstract

PURPOSE:To improve the rigidity as well as the soundproofing effect of flat sections and lighten the weight of the same sections by a method wherein the flat plate sections, forming respective surfaces of the cleaner case, are formed by synthetic resin plates and metallic reinforcing plates, which are formed integrally with the synthetic resin plates so as to be buried into the synthetic resin plates. CONSTITUTION:The cleaner case 17 is made of synthetic resin and a partitioning plate 18 is formed integrally in the case at the half way of the fore and rear direction thereof to divide it into fore and rear cleaner cases 20, 21. The partitioning plate 18 is formed with a communicating port 22 while an element 16 is provided so as to cover the same port 22. In this case, the flat plate sections 30, forming respective surfaces of the fore case 20, are formed by the synthetic resin plates 28 and the metallic reinforcing plates 29 buried into the resin plates 28. The reinforcing plates 29 are made of perforated metals having a multitude of circular holes and are provided independently in every flat plate sections 30. The resin plates 28 and the reinforcing plates 29 are formed integrally. According to this method, the rigidity of the flat plate section 30 may be improved and improvement of soundproofing effect as well as lightening of the weight of the same section 30 may be achieved.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a resin cleaner case included in an air cleaner for an engine mounted on a motorcycle or the like.

(Prior Art) A general air cleaner for a two-engine engine has an element that filters intake air from the engine, and a cleaner case that houses this element. An air inlet portion for introducing outside air is formed in the cleaner case on the upstream side of this element. Further, an air outlet portion for discharging filtered air is formed in the cleaner case on the downstream side of the element. The air outlet portion is communicated with the intake port of the engine via the carburetor.

Incidentally, in order to quickly supply a large amount of air to the engine when the engine takes in air, it is preferable that the cross section of the air cleaner be as large as possible. For this reason, for example, when installing an air cleaner in a motorcycle, the cleaner case is formed into a box shape with a rectangular cross section to make effective use of the extra space between it and surrounding attachments, and it is easy to shape. In some cases, it is made of resin to make it more durable.

However, since the flat plate portions forming each surface of the cleaner case have low rigidity, they may vibrate due to fluctuations in the intake pressure of the engine, which may amplify intake noise.

In addition, conventionally, there are products in which ribs are integrally molded on the flat plate part in order to prevent vibration of the flat plate part, but if ribs are formed to sufficiently suppress vibration of the flat plate part and insulate intake noise,
The weight of the cleaner case becomes excessive, which is undesirable.

(Object of the Invention) The present invention was made in view of the above-mentioned circumstances, and it improves the rigidity of the flat plate portion of the cleaner case, sufficiently suppresses vibrations in the flat plate portion, and improves the air intake. The purpose is to improve the soundproofing effect against noise, and at the same time reduce the thickness of the cleaner case to reduce the weight of the case.

(Structure of the Invention) The present invention is characterized in that the cleaner case is made of resin and is formed into a substantially box shape, in which the flat plate portion of the cleaner case is made of resin. And, it has a metal reinforcing plate integrally molded with the resin plate so as to be embedded in the resin plate.

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

In FIGS. 1 and 2, ``■'' is a motorcycle, and an engine 3 is attached to a body frame 2 of the motorcycle. A front wheel 6 is provided at the front of the vehicle body frame 2 via a front fork 4, and a rear wheel 8 is pivotally supported at the rear of the vehicle body frame 2 via a swing arm 7 so as to be vertically swingable. A shock absorber 9 is installed between the swing arm 7 and the vehicle body frame 2.

A carburetor 11 is connected to the intake port of the engine 3, and the carburetor 11 is provided with an air cleaner 12 that filters the intake air of the engine 3. Reference numeral 13 denotes a flow path for blow-by gas, which circulates blow-by gas leaking from the combustion chamber 14 of the engine 3 to the air cleaner 12.

In FIGS. 3 to 6, the air cleaner 12 is
an element 16 that filters air supplied to the engine 3;
It has a cleaner case 17 that houses this element 16. The pivot portion 9a of the shock absorber 9 is located near the lower surface of the cleaner case 17, and the rear wheel 8 that swings upward is located near the upper rear surface. A battery 19 is located.

The cleaner case 17 is made of resin, and a partition plate 18 is integrally formed inside the cleaner case 17 at an intermediate portion in the front-rear direction. The cleaner case 17 on the rear side of the vehicle body from this partition plate 18 is used as a ml case 20, and the cleaner case 17 on the front side of the same is used as a second case 21. The partition plate 18 has a communication 1
22 is formed, and the above-mentioned elm 16 is provided so as to cover this communication port 22. This Niremen) 16 is ff
11 built into the case 20. An air inlet section 23 for introducing outside air is formed in the cleaner case 17 on the upstream side of the elm 16, while an air outlet section 24 is formed in the second case 21. Then, outside air is sucked in from the air inlet section 23 by the suction force of the engine 3, and this air is filtered by the element 16 and passes through the communication port 22 to the second case 2.
1. This filtered air is taken into the engine 3 through the air outlet section 24 and the carburetor 11.

2. The first case 20 has a substantially rectangular box shape.

An opening 26 is formed on one side of the first case 20, and the opening 26 can be opened and closed using a lid plate 27 made of resin. The element 16 can be taken in and out of the first case 20 through the open opening 26. Further, when the opening 26 is closed, the cover plate 27 is
Both sides of the element 16 are sandwiched between the inner wall of the il case 20 facing the inner wall of the il case 20, and thus the element 16 is prevented from wobbling within the first case 20.

The flat plate portion 30 forming each surface of the first case 20 includes a resin plate 28 and a metal reinforcing plate 29 embedded in the resin plate 28. This reinforcing plate 29 is made of punching metal having a large number of circular holes 29a, and each flat plate part 30
Each is set up independently.

Further, the resin plate 28 and the reinforcing plate 29 are integrally molded. That is, first, the reinforcing plate 29 is attracted into a resin molding mold by a magnet, and then thermally plasticized resin is filled into the mold by injection molding, so that the resin plate 28 and the reinforcing plate 29 are integrally molded. be done. In this case, the circular hole 29a is also filled with resin, and the resin plate 28 and reinforcing plate 29 are firmly bonded.

In addition, in the case of item 2, one side of the reinforcing plate 29 is adsorbed to the mold and a resin layer is formed on the other side, so the reinforcing plate 29 is biased towards the inner or outer side of the resin plate 28. That will happen. Therefore, during cooling, the flat plate portion 30 is slightly curved so that the side of the resin layer having a small shrinkage rate becomes a concave surface (as shown by the chain dotted line in Figure 4). By curving the flat plate portion 30 in this manner, the rigidity of the flat plate portion 30 can be improved.

Note that although the above is based on the illustrated example, the resin plate 28 and the reinforcing plate 2
9 may be integrally molded by blow molding. Further, the reinforcing plate 29 may be formed by bending a single plate material and integrally molding the reinforcing plates of each flat plate portion 30. In this case, the resin plate 2
8 and the reinforcing plate 29, each flat plate portion 30 curves more greatly.

(Effects of the Invention) According to the present invention, in an engine air cleaner in which the cleaner case is made of resin and is formed into a substantially box shape, the flat plate portion of the cleaner case is connected to a resin plate, and the flat plate portion is formed to be embedded in the resin plate. Since the cleaner case includes a metal reinforcing plate integrally formed with the resin plate, the rigidity of the flat plate portion of the cleaner case is improved by the reinforcing plate integrally formed with the resin plate. Therefore, the occurrence of vibration in the flat plate part is suppressed,
In addition, the reinforcing plate also improves the soundproofing effect against intake noise.

In addition, since the metal reinforcing plate is embedded in the resin plate and integrally molded with the resin plate, the two are securely connected without peeling off from each other. Even if it is made smaller, the rigidity of this flat plate portion is sufficiently maintained, and therefore, by reducing the wall thickness in this way, the weight of the cleaner case can be reduced.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, in which Fig. 1 is an overall side view of a motorcycle, Fig. 2 is a simplified partial sectional view of Fig. 1, Fig. 3 is a partial sectional side view of an air cleaner, and Fig. 4 is a partial sectional view of the air cleaner. Figure 3 is an enlarged view of the section shown by the arrow ■. Figure 5 is a view taken along the v-v line in Figure 3.
The figure is a partial cross-sectional plan view of the air cleaner. 3. Engine, 12- Air cleaner, 16. Element, ■7Φ Cleaner case, 28. Resin plate, 2
9... Reinforcement plate, 30... Flat plate part. Patent applicant Yamaha Motor Co., Ltd.

Claims (1)

[Claims] 1.Equipped with an element that filters the air supplied to the engine and a cleaner case that houses this element.
In an engine air cleaner in which the cleaner case is made of resin and is formed into a substantially box shape, the flat plate portions forming each side of the cleaner case are integrated with the resin plate so as to be embedded in the resin plate. A resin cleaner case for an engine air cleaner, comprising a molded metal reinforcing plate.