JPH0232864Y2 - - Google Patents

Description

[Detailed description of the invention] A. Purpose of the invention (1) Industrial application field The present invention relates to an engine air cleaner, and in particular, a cleaner base having an air passage connected to an engine intake passage, and a cleaner base having an air passage connected to an engine intake passage. a box-shaped cleaner cover connected to define a filtration chamber connected to the air passage; and a cylindrical cleaner element accommodated in the filtration chamber, the inlet communicating the filtration chamber with the atmosphere; The present invention relates to an improvement in which a pipe is disposed in a triangular space between a corner of the cleaner cover and the cleaner element.

(2) Conventional technology In the conventional air cleaner,
As disclosed in Publication No. 62265, a cylindrical inlet pipe is integrally molded with the cleaner base, and this inlet pipe is inserted and placed in the triangular space between the corner of the cleaner cover and the cleaner element. are doing.

(3) Problems to be solved by the invention However, according to the above conventional configuration, the inlet pipe is integrated with the cleaner base, so the length of the inlet pipe has to be shortened in order to apply it to engines with different intake characteristics. Whenever a change is made, a new cleaner base with an inlet pipe of the desired length must be manufactured, leading to increased costs.

Furthermore, if a cylindrical inlet pipe is inserted into the triangular space inside the corner of the cleaner cover, an unnecessary gap will be created between the inlet pipe and the corner. It cannot be said that the space is used effectively.

The present invention was developed in view of the above circumstances, and allows the length of the inlet pipe to be changed at a low cost, and also allows the space inside the filtration chamber to be used as effectively as possible for installing the inlet pipe. It is an object of the present invention to provide the above-mentioned air cleaner.

B. Structure of the invention (1) Means for solving the problem In order to achieve the above object, the present invention has a corner part and a pair formed on the inner wall of the cleaner cover so as to be lined up with this corner part in between. The present invention is characterized in that the inlet pipe is constituted by a groove and a plate-shaped partition member whose both ends are fitted and supported by the groove.

(2) Effect According to the above configuration, it is possible to obtain an inlet pipe of a desired length for a cleaner cover of the same shape by simply replacing only the partition member with one of a different length.
Moreover, since the plate-shaped partition member is a small component, it is possible to change the length of the inlet pipe at low cost.

In addition, not only is there no unnecessary gap between the inlet pipe and the cleaner cover, but there is also no part where the walls overlap, so the triangular space inside the corner can be used as effectively as possible to reduce the passage area. It is possible to install a large inlet pipe.

(3) Embodiment Hereinafter, an embodiment of the present invention will be described with reference to the drawings. An air cleaner A is installed at the upstream end of an intake path P in order to purify intake air of an engine E. This air cleaner A has the above-mentioned intake path P.
A cleaner base 1 made of synthetic resin having a hook-shaped air passage 2 connected to the air passage 2, and a filtration chamber 4 that covers the upper surface of the cleaner base 1 and is connected to the air passage 2 between it.
It consists of a cleaner cover 3 made of synthetic resin defining a filtration chamber 4, and a cleaner element 5 housed in the filtration chamber 4.

The cleaner base 1 is composed of an L-shaped lower base 1a connected to the upstream end of the intake passage P, for example, a carburetor, and an annular upper base 1b connected to the upper end of the L-shaped base lower part 1a. The base end of a connecting bolt 6 that passes through the air passage 2 and stands high above the base upper part 1b is embedded and fixed in the lower part 1a. Furthermore, an annular positioning projecting wall 7 that surrounds the entrance of the air passage 2 and projects upward is formed on the upper surface of the base upper part 1b.

The cleaner cover 3 has a substantially rectangular cross-sectional shape,
It has a box shape with an open bottom surface, and two pairs of grooves 8 ₁ , 8 ₁ , 8 ₂ , 8 ₂ are formed on the inner wall thereof, facing each other with the two corners 3 a and 3 b in between. be done. Each groove portion 8 ₁ , 8 ₂ extends in parallel from the open lower surface of the cleaner cover 3 to the ceiling wall, and each pair of groove portions 8 ₁ , 8 ₁ , 8 ₂ , 8 ₂ has a
A plate-shaped partition member 9 ₁ with an appropriate length shorter than the height of
Both ends of the grooves 8 ₁ , 8 ₁ , 8 ₂ , 8 ₂ and the partition members 9 ₁ , _{9 2 are} fitted and welded together.
and the inlet pipe 10 ₁ , from the corner portions 3 a, 3 b of the cleaner cover 3 facing the partition members 9 ₁ , 9 ₂
10 ₂ are constructed. These inlet pipes 10 ₁ , 10 ₂
The filtration chamber 4 is communicated with the atmosphere.

Further, the ceiling wall of the cleaner cover 3 has a through hole 1 in the center thereof through which the tip of the connecting bolt 6 passes.
1 is bored, and an annular reinforcing rib 12 that surrounds the through hole 11 and an annular presser rib 13 that largely surrounds the reinforcing rib 12 are provided protruding from its inner surface.

The cleaner element 5 is composed of a cylindrical filter medium 14 having an oval cross section, an upper end plate 15 adhered to the upper end surface of the filter medium 14, and an annular lower end plate 16 adhered to the lower end surface of the filter medium 14. and upper end plate 1
A seal grommet 17 through which a connecting bolt 6 passes is attached to the center of the seal grommet 5 . Therefore, the lower end plate 1
6 is fitted onto the outer periphery of the positioning projecting wall 7 of the cleaner base 1 and placed on the upper surface of the cleaner base 1 via the packing 18, and the first wing nut is attached to the connecting bolt 6 passing through the seal grommet 17. 19, the cleaner element 5 is held in place on the cleaner base 1.

Further, the presser rib 13 of the cleaner cover 3 is brought into contact with the upper end plate 15 of the cleaner element 5, and the second wing nut 2 is attached to the connecting bolt 6 passing through the through hole 11.
0, the cleaner cover 3 is connected to the cleaner base 1 via the cleaner element 5.

In the air cleaner A assembled in this way, the inlet pipes 10 ₁ and 10 ₂ are connected to the corners 3a and 3b of the cleaner cover 3 and the cleaner element 5.
The inlet pipes 10 ₁ and 10 ₂ have corner portions 3 on their walls.
a, 3b, the inlet pipes 10 ₁ , 1
Not only is there no unnecessary gap between 0 ₂ and the corner portions 3a and 3b, but there is also no portion where the walls overlap. Therefore, the triangular space S inside the corner portions 3a, 3b is utilized as effectively as possible to connect the inlet pipes 10 ₁ ,
10 ₂ passage area can be expanded.

Note that when the cleaner base 1 and the cleaner cover 3 are connected, the cleaner cover 3 is attached to the periphery of the base upper part 1b in order to restrict the opposing positions of the cleaner base 1 and the cleaner cover 3.
A positioning projecting wall 21 is formed which fits into the inner circumferential surface of the open end.

Next, the operation of this embodiment will be explained.

During the operation of the engine E, the outside air subjected to the intake action flows into the filtration chamber 4 through the inlet pipes 10 ₁ and 10 ₂ , is filtered by the cleaner element 5 in the chamber 4, and then passes through the air passage 2. It is inhaled into the intake path P of the engine E. The intake noise of the engine E propagates upstream along the above-mentioned path, but is muffled within the inlet pipes 10 ₁ and 10 ₂ , so that propagation of the intake noise into the atmosphere can be suppressed.

Incidentally, the inlet pipes 10 ₁ , 10 ₂ have respective pairs of groove portions 8 ₁ , 8 ₁ , 8 ₂ , which sandwich the corner portions 3a, 3b.
8 ₂ engages both ends of the plate-shaped partition members 9 ₁ and 9 ₂ , so the desired length can be obtained by simply replacing the partition members 9 ₁ and 9 ₂ with ones of different lengths. The inlet pipes 10 ₁ and 10 ₂ can be easily obtained.

Therefore, for example, when manufacturing several types of air cleaners A for engines E with different intake characteristics, it is necessary to assemble several types of partition members 9 ₁ and 9 ₂ of different lengths to the corresponding cleaner covers 3. According to
Inlet pipe 10 ₁ , 1 matched to each engine E
Several types of air cleaner A having _0.02 can be obtained easily and quickly. Moreover, the plate-shaped partition wall member 9
₁ and 9 ₂ are small parts, making it possible to change the length of the inlet pipes 10 ₁ and 10 ₂ at low cost.

C. Effect of the invention As described above, according to the invention, a corner part, a pair of groove parts formed on the inner wall of the cleaner cover so as to be lined up with the corner part in between, and both side ends fitted into these groove parts. Since the inlet pipe is constructed from the supported plate-shaped partition member, an inlet pipe of a desired length can be obtained by simply replacing only the partition member, which is a small part, with one of a different length. The length of the inlet pipe can be changed at low cost, and it can be quickly adapted to engines with different intake characteristics.

In addition, since the inlet pipe uses the corner of the cleaner cover for its pipe wall, the triangular space inside the corner can be used as effectively as possible, making it possible to install an inlet pipe with a large passage area. Therefore, it is possible to improve the air intake performance of the air cleaner and make it more compact at the same time.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is a front view taken longitudinally of the main part, and FIG.
A line sectional view, Figure 3 is a - line sectional view of Figure 2,
FIG. 4 is a perspective view of the main parts. A...Air cleaner, E...Engine, P...
Intake path, S...Triangular space, 1...Cleaner base, 2...Air passage, 3...Cleaner cover, 3
a, 3b... Corner portion, 4... Filtration chamber, 5... Cleaner element, 6... Connection bolt, 8 ₁ , 8 ₂ ...
...Groove portion, 9 ₁ , 9 ₂ ...Partition member, 10 ₁ , 10 ₂ ...
...Inlet pipe.

Claims (1)

[Claims for Utility Model Registration] A cleaner base 1 having an air passage 2 connected to the intake passage P of the engine E, and a filtration chamber 4 connected to the cleaner base 1 and connected to the air passage 2 between it. The cleaner cover 3 includes a box-shaped cleaner cover 3 that defines a box-shaped cleaner cover 3, and a cylindrical cleaner element 5 housed in the filter chamber 4, and inlet pipes 10 ₁ and 10 ₂ that communicate the filter chamber 4 with the atmosphere. In the engine air cleaner disposed in the triangular space S between the corner parts 3a, 3b and the cleaner element 5, the corner parts 3a, 3b and the corner parts 3a, 3
Pairs of grooves 8 ₁ , 8 ₁ , 8 ₂ , 8 ₂ are formed on the inner wall of the cleaner cover 3 so as to be lined up with b in between.
and plate-shaped partition members 9 ₁ , 9 ₂ whose opposite ends are fitted and supported in the grooves 8 ₁ , 8 ₁ , 8 ₂ , 8 ₂ , and the inlet pipes 10 ₁ , 10 ₂ are constructed of the same. An air cleaner for engines.