JPS60263742A - Vibration isolator of vertical diesel engine - Google Patents

Abstract

PURPOSE:To extend the life of vibration isolating rubbers and require no wide space around an engine by providing stoppers buffing and damping the large sway of the engine. CONSTITUTION:A vertical diesel engine 19 is mounted on a base member 11 via vibration isolating rubbers 17. Stoppers 33, 35 located in the vertical direction to a crank shaft 25 and made of an elastic material fixed to the base member are protruded in the space S having an adequate capacity formed between the vibration isolating rubbers 17. The large sway of the engine 19 is buffed and damped by the stoppers 33, 35 thereby the allowable deformation or larger of the vibration isolating rubbers 17 is prevented, and their life can be extended. In addition, no wide space is required around the engine.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] This invention relates to a vibration prevention device for a vertical diesel engine.

[Prior art]

Since engines have reciprocating members such as pistons, connecting rods, and cranks, vibrations occur in vertical and horizontal directions. Also, when the engine attempts to rotate another machine, a torque reaction is applied to the engine, causing it to swing in a direction perpendicular to the crankshaft.

Therefore, in order to prevent these vibrations and rocking, a soft rubber material that is less likely to resonate with the engine is interposed between the engine, the foundation, and the members.

However, in a diesel engine, since the torque fluctuation becomes large as a result of the large explosive force at the time of starting, the vibration becomes large. Therefore, if soft anti-vibration rubber is used to prevent vibration during steady operation, the anti-vibration rubber will deform beyond its allowable deformation limit, shortening its lifespan. An inconvenience arose when a large space had to be specially secured around the area.

(Object of the invention) This invention was made based on the above situation,
The purpose is to provide a vibration isolator for a vertical diesel engine that extends the life of the vibration isolator and does not require a special large space around the engine.

[Structure of the invention]

This purpose is to provide a vibration prevention device for a vertical diesel engine in which the vertical diesel engine is installed on a foundation member via a plurality of vibration-proof rubber members and has a space between these vibration-proof rubber members. An elastic member is installed on the base member in a protruding state, and this elastic member is positioned in a direction perpendicular to the crankshaft of the engine, and an abutting member is installed on the engine in a state opposite to the elastic member. However, this was achieved by forming an appropriate gap between these abutting members and the elastic material.

[Explanation of Examples]

The present invention will be described in detail below based on the drawings.

In the figure, 11 is a foundation member, and a pair of pipe members 13a
, 13b, a pair of channel materials 15a, 15b is passed between them. 17.17. . . . is vibration-proof rubber, and channel materials 15a, 15 in the foundation member 11
It is erected on the top surface of b with screws. Ko (7)
Prevention T! Com 17.17. The river is Engine 1, which will be described later.
In this invention, a soft material is used because it is necessary to increase the vibration and damping.

Next, 19 is a vertical diesel engine, 21 is a cylinder of this engine 19, 23 is a crankcase, and 25 is a crankshaft. 27.27 is a first placket with a cross-section, and the crankcase 2 is connected to the crankcase 2 through its horizontal portion 27a.
3 is fixed with screws 29 and 29 on the bottom surface.

Further, the first bracket 27 has a vertical portion 27b, and the vertical portions 27b face inward from each other. The engine 19 is connected to the vibration isolating rubber 1 via this first placket 27.
Fixed on 7.17. In this case, the foundation member 11
A space S of an appropriate volume is formed between these vibration isolating rubbers 17, 17 between the crankcase 23 and the crankcase 23.

3L31 is a second placket having a cross-sectional shape, and is welded to the upper surface of the channel material 15a via its horizontal portion 31a. Further, this second bracket 31.31 corresponds to the abutting member of the present invention, and its vertical portion 31b is located approximately parallel to the vertical portion 27b of the first bracket 27. Reference numeral 33.35 denotes a rubber stopper, which is attached to the vertical portions 31b, 31b of the second bracket 31.31 by the mounting rod 37.
39 and screwed using the double NAND method. This I-socket 33.35 buffers and damps large swings when the engine 19 starts and stops, and its tip is connected to the vertical portion 2 of the first bracket 27.27.
They face 7b' and 27b at appropriate intervals T and T. These intervals T and -T are set only when the stopper 33. ．．
35 and the vertical part 27b of the first bracket 27.27, 2
7b are determined to be in contact with each other. That is, the stopper 33.35 and the vertical portions 27b, 27b of the first brackets 27, 27 do not come into contact with each other during rocking during normal operation. Moreover, since the stopper 33.35 has a hemispherical shape with a tapered tip, when the swinging becomes large and the contact with the vertical parts 27b, 27b of the first bracket 27.27 becomes large, the elastic load is also reduced accordingly. growing.

Incidentally, in this embodiment, there are a pair of stoppers 33 and 35, but if the engine 19 rotates in the direction of the arrow (FIG. 1), the left stopper 33 prevents rocking during startup, and the right stopper 35 This is to prevent rocking caused by the torque of the mechanical device 41 (described later) when the engine 19 is stopped.

Note that 41 is a mechanical device, which, like the engine 19, is installed on the base member 11 via a vibration-proof rubber 17.

This mechanical device 41 is connected to the crankshaft 25 of the engine 19 and is driven by the movement of the engine 19.

〔Effect of the invention〕

The vibration prevention device for a vertical diesel engine according to the present invention prevents the vibration of a vertical diesel engine in which the vertical diesel engine is installed on a foundation member via a plurality of vibration isolating rubber members and has a space between these vibration isolating rubber members. In the prevention device, an elastic material is installed on the base member in a state protruding into the space, and this elastic material is positioned in a direction perpendicular to the crankshaft of the engine, and the engine is opposed to the elastic material. Abutting members are installed, and gaps are appropriately formed between these abutting members and the elastic material.

Therefore, even if large vibrations occur when the engine starts and stops, this vibration is buffered and attenuated by the stopper, so even if soft rubber is used, which is suitable for preventing vibrations that occur during regular operation, Since this soft rubber is not required to be deformed beyond its allowable extent, it is possible to extend the life of the soft rubber. □Furthermore, since large swings of the engine are buffered and attenuated by the stopper and the vertical portion of the first bracket, the engine does not swing significantly, so there is no need to secure a large space around the engine.

Furthermore, the stopper and the vertical portion of the first bracket include:
Since it is installed in a space that has traditionally existed, the device does not become larger than conventional devices.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a front view, and FIG. 2 is a sectional view taken along the line ■-■ in FIG. 1, with only the waist section being taken. 11... Foundation member 17... Anti-vibration rubber member (vibration-isolating rubber) 19...
Vertical diesel engine 25... Crankshaft 31.31... Contact member (second bracket) 33.
35... Elastic material (stopper) S... Space Figure 1 II<-. Figure 2

Claims (1)

[Claims] +11 In a vibration prevention device for a vertical diesel engine in which a vertical diesel engine is installed on a foundation member via a plurality of vibration-isolating rubber members and has a space between these vibration-isolating rubber members, a vibration-preventing device for a vertical diesel engine that protrudes into the space. an elastic member is installed on the base member, the elastic member is located perpendicular to the crankshaft of the engine, and an abutment member is installed on the engine in a state opposite to the elastic member,
A vibration prevention device for a vertical diesel engine, in which a gap is appropriately formed between these contact members and the elastic material.