JP2018194059A - Engine mount device - Google Patents

Abstract

To provide an engine mount device which enables reduction of displacement when an engine vibrates.SOLUTION: An engine mount device includes: a base plate 40 having a first bending part 42 and a second bending part 43 located below the first bending part 42 in a vertical direction, the base plate 40 connected to a side frame; a lid plate 50 having a first side wall 52 and a second side wall 53 located at the outer side of the first bending part 42 and the second bending part 43, the lid plate 50 connected to an engine; an elastic block 60 which is fixed to the base plate 40 and the lid plate 50 in a deformable manner; a first elastic stopper 70 provided at the tip side of the first bending part 42; and a second elastic stopper 72 provided at the tip side of the second bending part 43. When the elastic block 60 deforms in conjunction with vibration of the engine, the elastic block 60 contacts with the second elastic stopper 72 in a state where the first side wall 52 is spaced apart from the first elastic stopper 70.SELECTED DRAWING: Figure 3

Description

  The present invention relates to an engine mount device, and more specifically to an engine mount device that connects an engine and a body frame.

In vehicles such as trucks, an engine is coupled to a vehicle body frame via an engine mount device. The engine mount device functions as a vibration isolator that suppresses transmission of engine vibration to the vehicle body frame.
The engine mount device includes, for example, a base plate connected to the vehicle body frame, a lid plate connected to the engine, and an elastic block (rubber block) sandwiched between the base plate and the lid plate.

JP 2009-8251 A

  A stopper capable of contacting the side wall of the lid plate is provided at the bent portion of the base plate. In this case, the side wall of the lid plate contacts the stopper when the engine vibrates, so that the deformation of the elastic block is restricted, and the displacement of the engine after that is restricted. However, in recent years, there has been a demand for further reducing displacement during engine vibration from the viewpoint of improving vibration isolation.

  Therefore, the present invention has been made in view of these points, and an object thereof is to provide an engine mount device that can reduce displacement during engine vibration.

In one aspect of the present invention, a base plate having a first bent portion and a second bent portion positioned below the first bent portion in the vertical direction and connected to a vehicle body frame, A first side wall and a second side wall located outside the first bent part and the second bent part, the lid plate being connected to the engine, and sandwiched between the base plate and the lid plate; An elastic block that is deformably fixed to the lid plate, a first elastic stopper that is provided on the distal end side of the first bent portion and faces the first side wall, and a distal end side of the second bent portion And a second elastic stopper that faces the second side wall, and the first side wall and the first elastic stopper are separated when the elastic block is deformed due to vibration of the engine. The In that state, the elastic block is in contact with the second elastic stopper, to provide an engine mounting device.
According to the above engine mount device, the elastic block comes into contact with the second elastic stopper before the first side wall of the lid plate comes into contact with the first elastic stopper during vibration of the engine. Thereby, compared with the case where a 1st side wall contacts an elastic block, the deformation amount for an elastic block to absorb engine vibration can be made small. As a result, the displacement during engine vibration can be reduced.

  The second distance between the second facing surface of the second elastic stopper facing the elastic block and the second bent portion is such that the first facing surface of the first elastic stopper facing the elastic block and the second distance are It is good also as being smaller than the 1st distance with 1 bending part.

  In the deformation direction of the elastic block, the width of the second elastic stopper may be larger than the width of the first elastic stopper.

  The first elastic stopper and the second elastic stopper may be made of the same member as the elastic block and extend from the elastic block.

  According to the present invention, there is an effect that it is possible to provide an engine mount device that can reduce displacement during vibration of the engine.

1 is a schematic diagram showing a vehicle 1 equipped with an engine mount device 30 according to an embodiment of the present invention. 2 is a schematic diagram illustrating an example of an external configuration of an engine mount device 30. FIG. 3 is a schematic diagram illustrating an example of an internal configuration of an engine mount device 30. FIG. 4 is a diagram for explaining a state of the engine mount device 30 when the engine 10 vibrates. FIG.

<Configuration of engine mount device>
Before describing the configuration of an engine mount device according to an embodiment of the present invention, an outline of a vehicle 1 on which the engine mount device is mounted will be described.

(Vehicle overview)
FIG. 1 is a schematic diagram showing a vehicle 1 on which an engine mount device 30 according to one embodiment is mounted.
The vehicle 1 is a vehicle having a frame structure, and is a truck as an example. However, the present invention is not limited to this, and the vehicle 1 may be a bus, for example. As shown in FIG. 1, the vehicle 1 includes an engine 10, a pair of side frames 20, and a pair of engine mount devices 30.

  The engine 10 generates a driving force for driving the driving wheels of the vehicle 1 by combusting and expanding a mixture of fuel and air in the cylinder. The engine 10 is supported on the side frame 20 via a pair of engine mount devices 30. The engine 10 generates vibration during operation. For example, vibration is generated due to the piston moving up and down in the cylinder of the engine 10.

  The pair of side frames 20 are body frames that form a skeleton of the vehicle 1. The pair of side frames 20 extends in the front-rear direction of the vehicle 1. The side frame 20 has a U-shaped cross-sectional shape. A cross member (not shown) extending in the vehicle width direction is provided between the pair of side frames 20.

  The pair of engine mount devices 30 are provided on both sides of the engine 10 in the vehicle width direction, and are connected to the engine 10 and the side frames 20. Specifically, the pair of engine mount devices 30 are connected to the foot 11 of the engine 10 and the bracket 21 of the side frame 20, respectively. The pair of engine mount devices 30 are arranged obliquely so as to intersect the vertical direction.

  The pair of engine mount devices 30 have a function of suppressing vibrations of the engine 10 from being transmitted to the side frames 20. Each of the pair of engine mount devices 30 has an elastic block (details will be described later), and the elastic block absorbs the vibration of the engine 10, thereby suppressing the vibration from being transmitted to the side frame 20.

(Detailed configuration of engine mount device)
A detailed configuration of the pair of engine mount devices 30 will be described with reference to FIGS. 2 and 3. In addition, since the structure of a pair of engine mount apparatus 30 is the same, below, the engine mount apparatus 30 located in the left side of the engine 10 is described as an example.

FIG. 2 is a schematic diagram illustrating an example of an external configuration of the engine mount device 30. FIG. 3 is a schematic diagram illustrating an example of an internal configuration of the engine mount device 30.
As shown in FIGS. 2 and 3, the engine mount device 30 includes a base plate 40, a lid plate 50, an elastic block 60, a first elastic stopper 70, a second elastic stopper 72, and a connecting plate 90. .

  The base plate 40 is a plate connected to the side frame 20. Specifically, the base plate 40 is connected to the bracket 21 of the side frame 20 via a connecting shaft 91 (see FIG. 1). The base plate 40 is disposed obliquely so as to intersect the vertical direction. As illustrated in FIG. 3, the base plate 40 includes a base portion 41, a first bent portion 42, and a second bent portion 43.

The base portion 41 is a portion that supports the elastic block 60. The lower surface side of the elastic block 60 is fixed to the base portion 41.
The first bent portion 42 is a portion bent vertically from one end side of the base portion 41. The second bent portion 43 is a portion bent vertically from the other end side of the base portion 41. As shown in FIG. 3, the second bending portion 43 is located below the first bending portion 42 in the up-down direction (vertical direction).

  The lid plate 50 is a plate that covers the upper portion of the elastic block 60. The lid plate 50 is connected to the engine 10. Specifically, the lid plate 50 is coupled to the foot 11 of the engine 10 via a coupling shaft 92 (see FIG. 1). Similar to the base plate 40, the lid plate 50 is disposed obliquely so as to intersect the vertical direction. As shown in FIG. 3, the lid plate 50 includes a flat plate portion 51, a first side wall 52, and a second side wall 53.

The flat plate portion 51 sandwiches the elastic block 60 with the base portion 41 of the base plate 40. The upper surface side of the elastic block 60 is fixed to the flat plate portion 51.
The first side wall 52 is located outside the first bent portion 42 of the base plate 40. The first side wall 52 is provided so as to face the first elastic stopper 70. The second side wall 53 is located outside the second bent part 43 of the base plate 40. The second side wall 53 is provided so as to face the second elastic stopper 72.

  The elastic block 60 is a block-like elastic body made of rubber, for example, and absorbs vibrations of the engine 10. The elastic block 60 is sandwiched between the base plate 40 and the lid plate 50. The elastic block 60 is fixed to the base plate 40 and the lid plate 50 so as to be deformable. For example, when an external force is input due to the vibration of the engine 10, the elastic block 60 is deformed so as to absorb the vibration.

  The first elastic stopper 70 is a stopper made of rubber, for example, and is provided on the first bent portion 42 of the base plate 40. Specifically, the first elastic stopper 70 is provided so as to cover the distal end side of the first bending portion 42. The first elastic stopper 70 faces the first side wall 52 of the lid plate 50.

  The second elastic stopper 72 is a stopper made of rubber, for example, and is provided in the second bending portion 43 of the base plate 40. Specifically, the second elastic stopper 72 is provided so as to cover the distal end side of the second bending portion 43. The second elastic stopper 72 faces the second side wall 53 of the lid plate 50. The size of the second elastic stopper 72 is different from the size of the first elastic stopper 70. Specifically, as shown in FIG. 3, the width W <b> 2 of the second elastic stopper 72 is larger than the width W <b> 1 of the first elastic stopper 70. That is, the second elastic stopper 72 is formed thick.

  Here, a surface of the first elastic stopper 70 that faces the elastic block 60 is referred to as a first opposing surface 70a, and a surface of the second elastic stopper 72 that faces the elastic block 60 is referred to as a second opposing surface 72a. In the present embodiment, for example, as shown in FIG. 3, the second distance L2 between the second facing surface 72a and the second bent portion 43 of the base plate 40 is equal to the first facing surface 70a and the first bent portion 42 of the base plate 40. The first distance L1 may be larger.

  The first elastic stopper 70 and the second elastic stopper 72 are made of the same member (rubber) as the elastic block 60. The first elastic stopper 70 and the second elastic stopper 72 extend from the elastic block 60. That is, the elastic block 60, the first elastic stopper 70, and the second elastic stopper 72 are integrally formed.

  When the elastic block 60 is deformed with the vibration of the engine 10, the elastic block 60 contacts the second elastic stopper 72 while the first side wall 52 of the lid plate 50 and the first elastic stopper 70 are separated from each other. In other words, the elastic block 60 contacts the second elastic stopper 72 before the first side wall 52 of the lid plate 50 contacts the first elastic stopper 70.

  FIG. 4 is a view for explaining the state of the engine mount device 30 when the engine 10 vibrates. 4A shows a state of the elastic block 60 before the engine 10 vibrates, and FIG. 4B shows a state during deformation of the elastic block 60 when the engine 10 vibrates. FIG. 4C shows a state where the elastic block 60 is in contact with the second elastic stopper 72.

  Here, it is assumed that force F indicated by an arrow is input to engine mount device 30 during vibration of engine 10. When this force F is input, the lid plate 50 and the elastic block 60 tend to be displaced in the direction of the broken arrow. Thereby, as shown in FIG.4 (b) and FIG.4 (c), the upper part of the elastic block 60 deform | transforms. Then, the elastic block 60 comes into contact with the second elastic stopper 72 as shown in FIG. Thus, the elastic block 60 contacts the 2nd elastic stopper 72, and the further deformation | transformation of the subsequent elastic block 60 can be suppressed. When the elastic block 60 comes into contact with the second elastic stopper 72, the first side wall 52 of the lid plate 50 is not in contact with the elastic block 60 and is separated from the elastic block 60.

  Returning to FIG. 3, the connecting plate 90 is a flat plate connecting the elastic block 60 and the lid plate 50. The elastic block 60 is fixed to the connecting plate 90. The connecting plate 90 has a positioning convex portion 94 that is positioned with respect to the lid plate 50. Thereby, the elastic block 60 can be displaced together with the lid plate 50 when the engine 10 vibrates.

<Effect in this embodiment>
In the engine mount device 30 described above, when the elastic block 60 is deformed with the vibration of the engine 10, the elastic block 60 is in a state where the first side wall 52 of the lid plate 50 and the first elastic stopper 70 are separated from each other. The second elastic stopper 72 is positioned below the first elastic stopper 70 in the vertical direction.
According to the above configuration, the elastic block 60 comes into contact with the second elastic stopper 72 before the first side wall 52 of the lid plate 50 comes into contact with the first elastic stopper 70 when the engine 10 vibrates. Thereby, compared with the case where the 1st side wall 52 contacts the elastic block 60, the deformation amount for the elastic block 60 to absorb the vibration of the engine 10 can be made small. As a result, the displacement during vibration of the engine 10 can be reduced.

  As mentioned above, although this invention was demonstrated using embodiment, the technical scope of this invention is not limited to the range as described in the said embodiment, A various deformation | transformation and change are possible within the range of the summary. is there. For example, the specific embodiments of device distribution / integration are not limited to the above-described embodiments, and all or a part of them may be configured to be functionally or physically distributed / integrated in arbitrary units. Can do. In addition, new embodiments generated by any combination of a plurality of embodiments are also included in the embodiments of the present invention. The effect of the new embodiment produced by the combination has the effect of the original embodiment.

DESCRIPTION OF SYMBOLS 10 Engine 20 Side frame 30 Engine mount apparatus 40 Base plate 42 1st bending part 43 2nd bending part 50 Lid plate 52 1st side wall 53 2nd side wall 60 Elastic block 70 1st elastic stopper 72 2nd elastic stopper

Claims (4)

A base plate having a first bent portion and a second bent portion positioned below the first bent portion in the vertical direction and connected to the vehicle body frame;
A lid plate having a first side wall and a second side wall located outside the first bent part and the second bent part and connected to the engine;
An elastic block sandwiched between the base plate and the lid plate, and deformably fixed to the base plate and the lid plate;
A first elastic stopper provided on a distal end side of the first bent portion and facing the first side wall;
A second elastic stopper provided on the distal end side of the second bent portion and facing the second side wall;
With
An engine mount device, wherein the elastic block contacts the second elastic stopper in a state where the first side wall and the first elastic stopper are separated from each other when the elastic block is deformed with vibration of the engine. The second distance between the second facing surface of the second elastic stopper facing the elastic block and the second bending portion is equal to the first facing surface of the first elastic stopper facing the elastic block and the first bending portion. Smaller than the first distance with the part,
The engine mount device according to claim 1. In the deformation direction of the elastic block, the width of the second elastic stopper is larger than the width of the first elastic stopper.
The engine mount device according to claim 1 or 2. The first elastic stopper and the second elastic stopper are made of the same member as the elastic block and extend from the elastic block.
The engine mount device according to any one of claims 1 to 3.

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