JPH02109043U

JPH02109043U -

Info

Publication number: JPH02109043U
Application number: JP1755689U
Authority: JP
Priority date: 1989-02-17
Filing date: 1989-02-17
Publication date: 1990-08-30

Description

[Brief explanation of the drawing]

第１図ないし第３図は本考案の第１実施例を示
すもので、第１図はシリンダブロツクの横断平面
図、第２図は両バランサ軸を駆動するための巻掛
伝動系を示す斜視図、第３図は第１図の−線
拡大断面図、第４図および第５図は本考案の第２
実施例を示すものであり、第４図は第３図に対応
する断面図であつて第５図の−線断面図、第
５図は第４図の−線断面図である。１……機関本体としてのシリンダブロツク、１
ａ……側壁、２……クランク軸、３，４……バラ
ンサ軸、３ａ，３ｂ，４ａ，４ｂ……偏心重錘部
、８，１１……軸受孔、１４，１８……スペーサ
、１４ａ……円筒部、１４ｂ……フランジ部、１
４ｃ……係合鍔部、２９……ギヤ、３０……回り
止め手段としてのボルト、３２……係合凹部、３
３，４１……通路、３８……シール部材、３９…
…給油路。 Figures 1 to 3 show a first embodiment of the present invention, with Figure 1 being a cross-sectional plan view of the cylinder block, and Figure 2 being a perspective view showing a wrap-around transmission system for driving both balancer shafts. Figures 3 and 3 are enlarged sectional views taken along the - line in Figure 1, and Figures 4 and 5 are the second views of the present invention.
4 is a cross-sectional view corresponding to FIG. 3, and is a cross-sectional view taken along the line -- in FIG. 5, and FIG. 5 is a cross-sectional view taken along the line -- in FIG. 4. 1... Cylinder block as the engine body, 1
a... Side wall, 2... Crankshaft, 3, 4... Balancer shaft, 3a, 3b, 4a, 4b... Eccentric weight portion, 8, 11... Bearing hole, 14, 18... Spacer, 14a... ...Cylindrical part, 14b...Flange part, 1
4c...Engagement flange, 29...Gear, 30...Bolt as rotation prevention means, 32...Engagement recess, 3
3, 41... passage, 38... sealing member, 39...
...Refueling route.

Claims

[Claims for Utility Model Registration] 1. One side wall of the engine body along the crankshaft axis allows insertion of a balancer shaft parallel to the crankshaft axis and having an eccentric weight part into the engine body. A bearing hole having an inner diameter is provided, and the balancer shaft is rotatably supported in the bearing hole via a spacer that is inserted and fixed into the bearing hole, and an end of the balancer shaft protrudes from the side wall of the engine body. In a balancer shaft bearing device for an internal combustion engine in which a gear is attached to transmit power from the crankshaft, an annular engagement recess is formed between the ends of the gear and the balancer shaft, and the gear is inserted into the bearing hole. A balancer shaft bearing device for an internal combustion engine, characterized in that a spacer basically formed in a cylindrical shape is integrally provided with an engagement collar portion that engages with the engagement recess. (2) The spacer includes a cylindrical part that is inserted into the bearing hole, and a flange part that extends radially outward from the axially outer end of the cylindrical part and comes into close contact with the outer surface of the side wall of the engine body. The balancer shaft is provided with a passage for supplying lubricating oil, and an annular seal member is interposed between the outer surface of the cylindrical part and the inner surface of the bearing hole on the axially inner side of the passage. A balancer shaft bearing device for an internal combustion engine according to item (1), characterized in that an oil supply passage is provided, one end of which communicates with the passage and the other end of which communicates with the engagement recess. (3) The spacer includes a cylindrical part that is inserted into the bearing hole, and a flange part that integrally projects radially outward from the axially outer end of the cylindrical part, and has a space between the flange part and the side wall of the engine body. The balancer shaft bearing device for an internal combustion engine according to item (1), characterized in that a rotation preventing means is provided.