JPH064311U - Engine breather device - Google Patents

Abstract

(57) [Summary] [Purpose] The number of processing and assembly steps is reduced, assembly is facilitated and productivity is increased, and rattling between parts due to engine vibration is eliminated to eliminate noise generation. To do. [Composition] Breather case on the engine head cover 10
11 is integrally projected, and the breather passage detouring wall 16 located in the breather outlet chamber 24, the outlet chamber side porous plate 17, the steel wool 23 located in the oil separation chamber 22, the inlet chamber side porous plate 18 are provided inside thereof. Loaded sequentially, the member insertion port of the breather case 11 above
Attach the baffle 20 to 12. Breather passage detour wall 16 above
The outlet chamber side perforated plate 17, the inlet chamber side perforated plate 18, and the baffle plate 20 are integrally formed to facilitate assembly and eliminate rattling between the respective parts.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an engine breather device.

[0002]

[Prior art]

 The basic structure of this type of breather device is configured as shown in FIGS. 3 (A), (B) and FIG. That is, the breather case 111 is integrally projected on the upper wall 110a of the head cover 110 of the engine E, and the member insertion port 112 is formed inside the breather case 111. From this member insertion port 112, the breather passage detour located in the breather outlet chamber 124 is bypassed. The wall 116, the outlet chamber side perforated plate 117, the steel wool 123 located in the oil separation chamber 122, and the inlet chamber side perforated plate 118 are sequentially loaded to form the inlet wall of the breather inlet chamber 121 at the member insertion port 112 of the breather case 111. The baffle plate 120 is attached by a fixing bolt 113.

Conventionally, as shown in FIG. 3 (B), the breather passage bypass wall 116 is welded to the outlet chamber side perforated plate 117, and the other inlet chamber side perforated plate 118 and the baffle plate 120 are independent. It is configured as a part. In FIG. 3A, reference numeral 104 is an oil cap, reference numeral 105 is a crankcase, reference numeral 107 is a blow-by gas passage, reference numeral 108 is a piston, arrow 109 is a flow of blow-by gas, and reference numeral 125 is a breather outlet in FIG. Show the tube.

[0004]

[Problems to be solved by the device]

 In the above conventional example, the breather passage bypass wall 116, the outlet chamber side porous plate 117, the inlet chamber side porous plate 118, and the baffle plate 120 are formed as independent components as shown in FIG. 3B. The number of points is large, and the man-hours for processing and assembling increase accordingly. In addition, the assembly is time-consuming, resulting in low productivity and high production costs. Moreover, since the parts are formed as independent parts as described above, rattling may occur between the parts due to vibration of the engine and noise may be generated.

The present invention has been made in consideration of such circumstances. To reduce the processing man-hours and the assembly man-hours, to facilitate the assembling, to improve the productivity, and to reduce the production cost. The technical issue is to eliminate rattling between components due to engine vibration and to eliminate noise.

[0006]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the means adopted by the present invention is that a breather case 11 is integrally projectingly provided on an engine head cover 10 and a member insertion port 12 is formed inside the breather case 11. The breather passage bypass wall 16 located in the outlet chamber 24, the outlet chamber side perforated plate 17, the steel wool 23 in the oil separation chamber 22 and the inlet chamber side perforated plate 18 are sequentially loaded, and the member insertion port of the breather case 11 is inserted. In the breather device of the engine configured by mounting the baffle plate 20 that forms the inlet wall of the breather inlet chamber 21 on 12, the breather passage bypass wall 16, the outlet chamber side perforated plate 17, the inlet chamber side perforated plate 18, and The gist is that the baffle plate 20 is integrally formed.

[0007]

[Operation and effect of the device]

 The present invention has the following actions and effects. The breather passage bypass wall 16, the outlet chamber side perforated plate 17, the inlet chamber side perforated plate 18, and the baffle plate 20 are integrally formed, for example, as shown in FIG. 1 (B), and the number of parts is Decrease. Along with this, processing man-hours and assembly man-hours decrease. Also, assembling becomes easier and productivity is increased and production costs are reduced. By integrally forming as described above, the rattling between the respective components due to the vibration of the engine as in the conventional example is eliminated, and the noise due to the rattling is also eliminated.

[0008]

【Example】

 Hereinafter, embodiments of the present invention will be described in more detail with reference to the drawings. 1 shows a breather device according to a first embodiment of the present invention. FIG. 1 (A) is a longitudinal sectional view of the main part thereof, and FIG. 1 (B) is a perspective view of an insertion member which is a feature of the present invention. is there.

This first embodiment comprises a breather case 11 shown in FIG. 1 (A) and an insertion member 15 shown in FIG. 1 (B) inserted into the breather case 11. Similar to the conventional example, the breather case 11 is integrally provided on the upper wall 10a of the head cover 10 of the engine and has a member insertion opening 12 formed inside thereof, and a pair of caulking is provided on the left and right of the member insertion opening 12. A hole 13 is formed, and a breather outlet pipe 25 shown by an imaginary line is connected to the breather outlet chamber 24 at the upper part of the case.

The insert member 15 is made of cold-rolled steel plate (SPCC), and as shown in FIG. 1 (B), it is a tunnel-shaped breather passage bypass wall 16, outlet chamber side porous plate 17 and inlet chamber in order from the top. The side porous plate 18, the baffle plate 20, and the pair of left and right caulking projections 20a of the baffle plate 20 are integrally formed by press working from a single plate material, and the inlet chamber side porous plate 18 and the baffle plate 20 are formed. The connecting portion 19 is formed with a recess 19a for imparting elasticity.

When the member 15 is inserted into the breather case 11 and the pair of caulking projections 20 formed on the baffle plate 19 are caulked into the caulking hole 13 and assembled, the state shown in FIG. As shown, the breather passage detour wall 16 is located in the breather outlet chamber 22 in the breather case 11, and its top plate 16a is in pressure contact with the ceiling wall 11a in the breather case 11. An oil separation chamber 23 is formed between the outlet chamber side perforated plate 17 and the inlet chamber side perforated plate 18, and steel wool 23 is loaded into the oil separation chamber 22. A breather inlet chamber 21 is formed between the inlet chamber side porous plate 18 and the baffle plate 20.

The breather gas G containing a large amount of oil mist flows into the breather inlet chamber 21 from the front side inlet (not shown) of the tongue piece (reference numeral 20b in FIG. 1 (B)) of the baffle plate 19, and the inlet The oil is separated by the steel wool 23 in the oil separation chamber 22 through a large number of small holes 18a formed in the chamber side porous plate 18, and then the large number of small holes 17a formed in the outlet chamber side porous plate 17 are passed. Flow into the breather outlet chamber 24, bypass the breather passage bypass wall 16 and reach the breather outlet pipe 25 indicated by an imaginary line.

According to this embodiment, since the insertion member 15 is integrally formed as shown in FIG. 1B, the number of parts is reduced, the number of processing steps is reduced, the number of assembly steps is reduced, and the assembly is easy. Therefore, productivity can be increased and production costs can be reduced. Further, by integrally forming the insertion member 15, it is possible to eliminate the occurrence of noise due to rattling between the component parts due to the vibration of the engine as in the conventional example. In particular, as in this embodiment, when the recess 19a that imparts elasticity is formed in the connecting portion 19 and the top plate 16a of the breather passage bypass wall 16 is pressed against the ceiling wall 11a in the breather case 11, The above-mentioned noise prevention effect is remarkable.

2A and 2B show a breather device according to a second embodiment of the present invention. FIG. 2A is a longitudinal sectional view of a main part thereof, and FIG. 2B is a perspective view of an insertion member 15. In the second embodiment, a pair of caulking projections 13a is formed in place of the pair of caulking holes 13 of the first embodiment, and a pair of caulking projections 20a of the baffle plate 20 of the first embodiment is replaced. The difference is that the caulking hole 20b is formed, and the other points are the same as in the first embodiment.

The present invention is not limited to the above embodiment, and the insert member 15 may be replaced by a cold rolled steel plate (SPCC), and a spring steel plate may be used, and the pair of caulking holes 13 and 20b and the pair of caulking holes 13 and 20b may be used. Instead of the caulking projections 13a and 20a, the same fixing bolts (113 in FIG. 3 (A)) as in the conventional example may be used for fixing. Also, it is not necessary to say that the recess 19a of the connecting portion 19 may be omitted, or the size thereof may be appropriately changed as necessary.

[Brief description of drawings]

1 shows a breather device according to a first embodiment of the present invention, FIG. 1 (A) is a vertical cross-sectional view of a main portion thereof, and FIG. 1 (B) is a perspective view of an insertion member which is a feature of the present invention. Is.

2A and 2B show a breather device according to a second embodiment of the present invention. FIG. 2A is a vertical cross-sectional view of a main part thereof, and FIG. 2B is a perspective view of an insertion member.

3A and 3B show a breather device according to a conventional example, FIG. 3A is a longitudinal sectional view of a main part thereof, and FIG. 3B is a perspective view of an insertion member.

FIG. 4 is a longitudinal sectional view of the engine showing the arrangement of the breather device.

[Explanation of symbols]

10 ... Head cover, 11 ... Breather case, 1
2 ... member insertion port, 16 ... breather passage bypass wall,
17 ... Exit chamber side perforated plate, 18 ... Inlet chamber side perforated plate, 2
0 ... baffle, 21 ... breather entrance room, 22
… Oil separation chamber, 23… Steel wool, 24…
Breather exit room.

Claims (1)

[Scope of utility model registration request] 1. A breather case (11) is integrally provided on a head cover (10) of an engine, and a member insertion port (12) is provided inside thereof.
From this member insertion port (12), the breather passage bypass wall (16) located in the breather outlet chamber (24), the outlet chamber side perforated plate (17), and the steel wool located in the oil separation chamber (22) (23) ・ The perforated plate (18) on the inlet chamber side is sequentially loaded, and the baffle plate (20) forming the inlet wall of the breather inlet chamber (21) is attached to the member insertion port (12) of the breather case (11). In the breather device of the engine configured as described above, each of the breather passage bypass walls (16), the outlet chamber side perforated plate (17), the inlet chamber side perforated plate (18), and the baffle plate (20) are integrally formed. The breather device of the engine characterized in that.