JPH0637546U - Engine vibration reduction device - Google Patents

Abstract

(57) [Summary] [Structure] The oil pan 2 is attached to the lower side of the crankcase 1, and the oil surface 1 of the oil 17 stored in the oil pan 2
In the engine constituted by allowing the oil receiving plate 3 to face the peripheral edge portion 19 of 8 from above, the following is performed. The flange portion 6 provided on the outer periphery of the oil receiving plate 3 is attached to the crankcase 1
It was sandwiched and fixed between the oil pan 2 and the oil pan 2. [Effect] Since the flange portion 6 of the oil receiving plate 3 is fixed in contact with both the crankcase 1 and the oil pan 2, both the oil pan 2 and the crankcase 1 are fixed to the oil receiving plate 3.
Are reinforced by these, and these vibrations are reduced.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an engine vibration reduction device.

[0002]

[Prior art]

 FIG. 4 shows a conventional engine technology. Like the present invention, it has the following basic structure. That is, the oil pan 102 is attached to the lower side of the crankcase 101, and the oil receiving plate 103 is made to face from above from the peripheral portion 119 of the oil surface 118 of the oil 117 stored in the oil pan 102.

In an engine having such a basic structure, when the oil surface 118 in the oil pan tilts when the engine swings, the rising side of the peripheral portion 119 of this oil surface 118 is received by the oil receiving plate 103, so that the crank The entry of oil 117 into case 101 is suppressed. Therefore, even if the oil level 118 becomes low due to the consumption of the oil 117, the suction port 113 of the oil strainer 105 is not exposed on the oil level 118 when the engine vibrates, and the suction of air from here is prevented. It

By the way, in this prior art, since the oil receiving plate 103 is provided along the inner peripheral surface of the oil pan 102, this doubles as a reinforcing rib of the oil pan 102 and serves as a vibration reducing means of the oil pan 102. Also works. However, the vibration reducing function of the oil receiving plate 103 extends to the oil pan 102 to which it is directly attached, but not to the crankcase 101.

Therefore, in this prior art, in order to reduce the vibration of the crankcase 101, measures such as increasing the wall thickness of the crankcase 101 or providing a large number of reinforcing ribs on the crankcase 101 are taken. . In FIG. 4, reference numeral 120 is a cylinder block, 121 is a skirt portion, and the lower portion of the cylinder block 120 and the skirt portion 121 constitute the crankcase 101. Reference numeral 107 is a crankshaft, 108 is a bearing cap, 109 is a partition wall provided on the cylinder block 120, and 110 is a cap mounting bolt.

[0006]

[Problems to be solved by the device]

 In the above-mentioned conventional technique, in order to reduce the vibration of the crankcase 101, the thickness of the crankcase 101 is increased, or a large number of reinforcing ribs are provided on the crankcase 101. However, if the crankcase 101 is made thicker, it is against the demand for lower engine weight. Further, when a large number of reinforcing ribs are provided on the crankcase 101, the crankcase 101 is complicated to manufacture, which goes against the demand for cost reduction of the engine.

An object of the present invention is to provide an engine vibration reduction device that can reduce vibrations of both the oil pan and the crankcase by a lightweight and simple means.

[0008]

[Means for Solving the Problems]

 (First Invention) As shown in FIGS. 1 to 3, the first invention has an oil pan 2 attached to the lower side of the crankcase 1, and a peripheral edge of an oil surface 18 of oil 17 stored in the oil pan 2. In the engine constructed by exposing the oil receiving plate 3 to the part 19 from above, the flange portion 6 provided on the outer periphery of the oil receiving plate 3 is fixed by being sandwiched between the crankcase 1 and the oil pan 2. It is characterized by

(Second Invention) As shown in FIG. 1, the second invention is the engine vibration reducing device of the first invention, in which a plurality of bridge portions 4 are provided on the oil receiving plate 3 and the crankshaft 7 is provided. It is characterized in that the bearing caps 8 of the plurality of hanger type bearing portions 14 for bearing the bearings and the bridging portion 4 are fastened together with the crankcase 1 by the cap mounting bolts 10.

[0010]

[Operation and effect of the device]

 (First Invention) As illustrated in FIGS. 1 to 3, since the flange portion 6 of the oil receiving plate 3 is fixed in contact with both the crank case 1 and the oil pan 2, the oil pan 2 and the crank case are fixed. Both of them are reinforced by the oil receiving plate 3 to reduce their vibrations. As described above, since the oil receiving plate 3 can reduce the vibration of both the oil pan 2 and the crankcase 1, it is possible to reduce the weight and the cost of the engine.

(Second Invention) In addition to the effects of the first invention, the following effects are obtained. As illustrated in FIG. 1, since a plurality of hanger type bearing portions 14 are connected to each other via the oil receiving plate 3, the oil receiving plate 3 also serves as a bearing beam. Therefore, a dedicated bearing beam is not required, and the weight and cost of the engine can be further reduced.

[0012]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. 1A and 1B are views for explaining an engine vibration reducing apparatus according to a first embodiment of the present invention. FIG. 1A is a longitudinal sectional view of an essential part of the engine, and FIG. 1B is an engine of FIG. 1A. 3 is a perspective view of an oil receiving plate used in FIG. FIG. 2 is a view in which the engine of FIG. 1 (A) is longitudinally cut at another location.

This engine is a multi-cylinder vertical engine and is configured as follows. As shown in FIG. 1 (A), a skirt portion 21 is assembled on the lower side of the cylinder block 20, and the lower portion of the cylinder block 20 and the skirt portion 21 constitute a crankcase 1. The oil pan 2 is attached. The oil 17 for lubrication is stored in the oil pan 2, and the oil strainer 5 is immersed in this oil 17. The partition wall 9 of the cylinder block 20 is provided with a hanger type bearing portion 14, and the crankshaft 7 is supported by this. The hanger type bearing portion 14 is configured by fastening and fixing the bearing cap 8 to the lower side of the partition wall 9 with the cap mounting bolt 10.

This engine is provided with an oil receiving plate 3, and its structure is as follows. The oil receiving plate 3 has a rectangular frame shape in a plan view, and the oil receiving plate 3 faces the peripheral edge portion 19 of the oil surface 18 of the oil 17 stored in the oil pan 2 from above. When the oil surface 15 in the oil pan 2 tilts during engine vibration, the rising side of the peripheral portion 19 of the oil surface 18 is caught by the oil receiving plate 3, so that the oil 17 is prevented from entering the crankcase 1. To be done. Therefore, even if the oil surface 18 is low due to the consumption of the oil 17, the suction port 13 of the oil strainer 5 is not exposed on the oil surface 18 when the engine is rocked, and the suction of air from here is prevented. To be done.

The oil receiving plate 3 is inclined upward from the outer circumference toward the inner circumference. The outer circumference of the oil receiving plate 3 is provided with a horizontal flange portion 6 having a rectangular frame shape in a plan view. It is fixed by being sandwiched between it and the oil pan 2. In this way, since the flange portion 6 of the oil receiving plate 3 is fixed in contact with both the crankcase 1 and the oil pan 2, both the oil pan 2 and the crankcase 1 are reinforced by the oil receiving plate 3 and these Vibration can be reduced.

As shown in FIG. 1 (B), the oil receiving plate 3 is provided with a plurality of laterally-directed bridging portions 4 4 in parallel with each other, and an interference avoidance gap 11 is provided between adjacent bridging portions 4. As shown in, the rotating crank arm 12 passes through the interference avoidance gap 11. As shown in FIG. 1 (A), the bridging portion 4 is fastened together with the bearing cap 8 to the partition wall 9 of the cylinder block 20 by the cap mounting bolt 10. In this case, since the plurality of hanger type bearing portions 14 are connected to each other via the oil receiving plate 3, the oil receiving plate 3 also serves as a bearing beam.

3A and 3B are views for explaining an engine vibration reducing apparatus according to a second embodiment of the present invention. FIG. 3A is a longitudinal sectional view of an essential part of the engine, and FIG. 3B is FIG. 3A. 2] A perspective view of an oil receiving plate and a bearing beam used in the engine of FIG. The second embodiment differs from the first embodiment in the following points. The oil receiving plate 3 is formed horizontally. In addition to the oil receiving plate 3, a dedicated bearing beam 15 is used. The bearing beam 15 and the bearing cap 8 are fastened together with the partition wall 9 of the crankcase 1 with the cap mounting bolts 10 and fixed.

[Brief description of drawings]

1A and 1B are views for explaining an engine vibration reducing device according to a first embodiment of the present invention, FIG. 1A being a longitudinal sectional view of an essential part of the engine, and FIG. It is a perspective view of an oil receiving plate used in an engine.

FIG. 2 is a view in which the engine of FIG. 1 (A) is longitudinally cut at another location.

3A and 3B are views for explaining an engine vibration reducing device according to a second embodiment of the present invention. FIG. 3A is a longitudinal sectional view of an essential part of the engine, and FIG. 3B is a sectional view of FIG. FIG. 3 is a perspective view of an oil receiving plate and a bearing beam used in the engine.

FIG. 4 is a diagram corresponding to FIG. 1A of an engine according to a conventional technique.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Crank case, 2 ... Oil pan, 3 ... Oil receiving plate, 4 ... Bridge part, 6 ... Flange part, 7 ... Crank shaft, 8
… Bearing caps, 10… Cap mounting bolts, 14
... Hanger type bearing, 17 ... Oil, 18 ... Oil surface, 19
... 18 peripheral portions.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Creator Manabu Miyazaki 64 Ishizukitamachi, Sakai City, Osaka Prefecture Kubota Sakai Manufacturing Co., Ltd.

Claims (2)

[Scope of utility model registration request] 1. An oil pan on the lower side of the crankcase (1)
Attach the (2) and store the oil in the oil pan (2).
The oil receiving plate is provided on the peripheral portion (19) of the oil surface (18) of (17).
In an engine configured so that (3) faces from above, the flange portion (6) provided on the outer periphery of the oil receiving plate (3) is sandwiched between the crankcase (1) and the oil pan (2). A vibration reduction device for an engine, which is fixed. 2. The engine vibration reducing apparatus according to claim 1, wherein the oil receiving plate (3) is provided with a plurality of bridge portions (4), and a plurality of hanger type bearing portions (B) for bearing the crankshaft (7) are provided. 14) the bearing cap (8) and the bridge portion (4),
A vibration reduction device for an engine, characterized in that the cap mounting bolt (10) is tightened together with the crankcase (1).