JP2017100567A - Support device for vehicular internal combustion engine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a support device for a vehicular internal combustion engine that can easily suppress vibration of a mount bracket for connecting the internal combustion engine with a vibration isolation device and can easily inhibit vibration from being transmitted from the internal combustion engine to a vehicle body member.SOLUTION: In a support device 35, a swollen portion 31 swollen from an engine cover 6 toward a vehicle body frame 8 is formed in the engine cover 6. Bolt holes 31A are formed on an upper surface 31a of the swollen portion 31, and bosses 32 each having a bolt hole 32A are formed on the side surface in the vehicle width direction of a lower portion of the swollen portion 31. A mount bracket 22 has: an upper fixation portion 22B and a lower fixation portion 22C that are fixed to the upper surface 31a of the swollen portion 31 with the bolt holes 31A and the bosses 32 by using bolts 33, 34; and a bent portion 22A bent in a projecting manner to a vibration isolation device 9 side so as to sandwich the swollen portion 31 vertically. A mount bracket 21 is connected to the bent portion 22A.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a support device for a vehicle internal combustion engine, and relates to a support device for a vehicle internal combustion engine that supports the internal combustion engine on a vehicle body member.

  In a vehicle such as an automobile equipped with an engine composed of an internal combustion engine, the engine is elastically supported by the vehicle body by a support device in order to prevent vibration generated as the engine is driven from being transmitted to the vehicle body. doing.

In particular, in an engine installed horizontally so that the cylinders are arranged in the vehicle width direction, downsizing tends to be achieved by reducing the number of cylinders from the viewpoint of improving the fuel consumption of the engine. However, when the dimension of the engine in the vehicle width direction is shortened without changing the dimensions of the vehicle body, the distance between the vehicle body and the engine is increased.
Thereby, the mount bracket which connects an engine and a vehicle body becomes long, and the rigidity of a mount bracket becomes low.

  On the other hand, a mount bracket that connects a vehicle body side mount bracket and an engine chain cover is divided into an engine side mount bracket and a stud pin (for example, see Patent Document 1).

JP 2010-1116020 A

  In such a conventional engine support structure, the length of the mount bracket is adjusted according to the increase or decrease in the number of cylinders of the engine, and the strength of the engine side mount bracket that applies a large load to the vehicle body side mount bracket Can be increased.

  However, the conventional engine-side mounting bracket has a base portion fixed to the chain cover formed in a flat plate shape extending in the vertical direction, and this flat plate-like base portion is fastened to a flat side surface of the chain cover by a bolt. Yes.

  In addition to this, the engine-side mount bracket is formed in a lateral T-shape to which the vehicle body-side mount bracket is fastened at a portion protruding from the vertical middle portion of the engine-side mount bracket toward the vehicle body-side mount bracket. Yes.

  Thereby, the part which protrudes toward the vehicle body side mounting bracket from the engine side mounting bracket tends to vibrate in the vertical direction of the engine, and as a result, the engine side mounting bracket tends to vibrate. As a result, it is difficult to suppress transmission of vibration from the engine to the vehicle body.

  The present invention has been made paying attention to the above-described problems, and can easily suppress the vibration of the mount bracket that connects the internal combustion engine and the vibration isolator, and the vibration from the internal combustion engine to the vehicle body member can be suppressed. It is an object of the present invention to provide a support device for an internal combustion engine for a vehicle that can easily suppress the transmission of.

  The present invention is provided between an internal combustion engine and a vehicle body member installed on a side in the vehicle width direction of the internal combustion engine, and the internal combustion engine side member connected to the internal combustion engine side is connected to the vehicle body member via an elastic body. An anti-vibration device supported on the internal combustion engine side member, and a mount bracket connected to the side surface in the vehicle width direction of the internal combustion engine. A support device for an internal combustion engine for a vehicle, which is divided into a first bracket connected to the internal combustion engine side member and a second bracket connected to a side surface in the vehicle width direction of the internal combustion engine, the vehicle of the internal combustion engine A bulging portion that bulges from the internal combustion engine toward the vehicle body member is formed on a side surface in the width direction, an upper fastening portion is formed on an upper surface of the bulging portion, and a vehicle below the bulging portion is formed. Lower fastening part is formed on the side surface in the width direction The second bracket has an upper end portion and a lower end portion connected to the upper fastening portion and the lower fastening portion, and sandwiches the bulging portion in the vertical direction of the vehicle. As described above, the anti-vibration device has a curved portion that curves in a convex shape, and the first bracket is connected to the curved portion.

  As described above, according to the present invention, the mounting bracket that connects the vibration isolator and the side surface in the vehicle width direction of the internal combustion engine is divided into the first bracket and the second bracket, and the second bracket is internally reinforced. The second bracket can be firmly connected to the internal combustion engine by being connected to the bulging portion of the internal combustion engine that is reinforced by the ribs and has higher rigidity than the flat portion.

In addition, the first bracket is connected to the second bracket by connecting the first bracket to the curved portion of the rigid second bracket connected to the upper surface of the bulging portion and the side surface in the vehicle width direction. It can be firmly connected.
Thereby, the vibration of the first bracket and the second bracket can be easily suppressed, and transmission of vibration from the internal combustion engine to the vehicle body member can be easily suppressed.

FIG. 1 is a side view of an engine provided with a mount bracket of a support device for a vehicle internal combustion engine according to an embodiment of the present invention. FIG. 2 is a perspective view of a support device for an internal combustion engine for a vehicle according to an embodiment of the present invention. FIG. 3 is a cross-sectional view of the vibration isolator in the vehicle internal combustion engine support device according to the embodiment of the present invention. FIG. 4 is a plan view of the vehicle internal combustion engine support device according to the embodiment of the present invention. FIG. 5 is a front view of a support device for an internal combustion engine for a vehicle according to an embodiment of the present invention. FIG. 6 is a perspective view of an engine cover according to an embodiment of the present invention. FIG. 7 is a front view of a support device mounted on a four-cylinder engine used for comparison with the support device for a vehicle internal combustion engine according to an embodiment of the present invention. FIG. 8 is a front view of a support device mounted on a three-cylinder engine used for comparison with the support device for a vehicle internal combustion engine according to an embodiment of the present invention.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a support device for a vehicle internal combustion engine according to the present invention will be described with reference to the drawings.
FIGS. 1-8 is a figure which shows the support apparatus of the internal combustion engine for vehicles of one Embodiment which concerns on this invention.

First, the configuration will be described.
In FIG. 1, a vehicle 1 is equipped with an engine 2 that is an internal combustion engine. The engine 2 includes a cylinder block 3, a cylinder head 4, and a cylinder head cover 5.

The cylinder block 3 is provided with a piston (not shown) and a crankshaft (not shown) that converts a reciprocating motion of the piston into a rotational motion. The cylinder head 4 is provided with an intake / exhaust camshaft (not shown) and an intake / exhaust valve (not shown).
The cylinder head cover 5 is provided on the upper part of the cylinder head 4, and forms a valve operating chamber (not shown) that accommodates the intake / exhaust camshaft together with the cylinder head 4.

  1 and 2, an engine cover 6 is attached to the side surface of the engine 2 in the vehicle width direction, and the engine cover 6 covers a timing chain (not shown) wound around the intake / exhaust camshaft and the crankshaft. . The engine cover 6 is fastened to the cylinder block 3 and the cylinder head 4 by a plurality of bolts 7.

  In FIG. 2, a vehicle body frame 8 is provided on the side of the engine 2 in the vehicle width direction, and a vibration isolator 9 is installed on the vehicle body frame 8. The vehicle body frame 8 of the present embodiment constitutes a vehicle body member of the present invention.

  2 and 3, the vibration isolator 9 includes an outer cylinder 10, an anti-vibration rubber 11 provided inside the outer cylinder 10, an inner cylinder 12 attached to the anti-vibration rubber 11, a vehicle body bracket 13, and the like. The stopper rubber 14 is provided.

  The outer cylinder 10 is formed in a cup shape, and the anti-vibration rubber 11 is provided inside the outer cylinder 10. The inner cylinder 12 is attached to the inner peripheral surface of the anti-vibration rubber 11, and the tip projects upward from the anti-vibration rubber 11.

  The vehicle body bracket 13 is fixed to the outer cylinder 10 and provided integrally with the outer cylinder 10, and is fixed to the vehicle body frame 8 by a plurality of bolts 15. The stopper rubber 14 is provided inside the vehicle body bracket 13, and one end 21 a of a mount bracket 21 attached to the engine 2 side is inserted into the stopper rubber 14.

  The stopper rubber 14 is provided between the vehicle body bracket 13 and the mount bracket 21 to prevent the mount bracket 21 from directly colliding with the vehicle body bracket 13 when the mount bracket 21 vibrates vertically and horizontally. The generation of noise from the vibration isolator 9 is prevented.

  In FIG. 3, an opening 13 </ b> A is formed on the upper surface of the vehicle body bracket 13. Openings 14A and 21A are respectively formed in the stopper rubber 14 and the mount bracket 21. The openings 14A and 21A face the opening 13A in the vertical direction of the vehicle 1 (hereinafter simply referred to as the vertical direction).

  The inner cylinder 12 is formed with a screw hole 12A into which the bolt 16 is fitted by a screw action. The vibration isolator 9 of the present embodiment connects the mount bracket 21 to the inner cylinder 12 by fitting the bolt 16 from the opening 13A to the screw hole 12A of the inner cylinder 12 through the openings 14A and 21A.

  As described above, the vibration isolator 9 of the present embodiment is installed between the engine 2 and the vehicle body frame 8 installed on the side of the engine 2 in the vehicle width direction, and the inner cylinder 12 connected to the engine 2 side includes It is supported on the vehicle body frame 8 via a vibration isolating rubber 11. The anti-vibration rubber 11 of the present embodiment constitutes an elastic body of the present invention, and the inner cylinder 12 constitutes an internal combustion engine side member of the present invention.

  In FIG. 2, one end 22 a of the mount bracket 22 is connected to the other end 21 b of the mount bracket 21 by a plurality of stud bolts 23 and nuts 24. The stud bolt 23 is provided at one end 22 a of the mount bracket 22 and protrudes upward from the one end 22 a of the mount bracket 22.

  A through hole (not shown) is formed in the other end portion 21b of the mount bracket 21. A stud bolt 23 is inserted into the through hole, and a nut 24 is fastened to a thread portion of the stud bolt 23 exposed above the through hole. . Thereby, the mount bracket 21 and the mount bracket 22 are connected.

  The other end 22 b of the mount bracket 22 is connected to the engine cover 6 by a bolt 33. The engine cover 6 of the present embodiment constitutes the vehicle width direction side surface of the engine of the present invention.

  The mount bracket 21 of the present embodiment is connected to the inner cylinder 12 and constitutes the first bracket of the present invention. The mount bracket 22 of the present embodiment is connected to the engine cover 6 and constitutes the second bracket of the present invention.

  The divided mounting brackets 21 and 22 constitute the mounting bracket 20 of the present invention, and the mounting bracket 20 has one end connected to the inner cylinder 12 and the other end connected to the engine cover 6.

In FIG. 6, a bulging portion 31 is formed in the engine cover 6, and the bulging portion 31 bulges from the engine cover 6 toward the vehicle body frame 8 as shown in FIG. 2.
In FIG. 6, a plurality of screw holes 31 </ b> A are formed on the upper surface 31 a of the bulging portion 31, and a plurality of bosses 32 having screw holes 32 </ b> A are formed on the side surface in the vehicle width direction below the bulging portion 31. Yes. The upper surface 31a and the screw hole 31A of the bulging portion 31 of the present embodiment constitute the upper fastening portion of the present invention, and the boss 32 and the bolt hole 32A constitute the lower fastening portion.

  2 and 5, the mount bracket 22 includes a bending portion 22A, and the bending portion 22A is curved in a convex shape toward the vibration isolator 9 so as to sandwich the bulging portion 31 in the vertical direction.

  An upper fixing portion 22B in which a through hole (not shown) is formed is formed at the upper end portion of the mount bracket 22 in the bending direction. The upper fixing portion 22B is fixed to the upper surface 31a of the bulging portion 31 by fastening the bolt 33 to the screw hole 31A through the through hole of the upper fixing portion 22B.

  A lower fixing portion 22C in which a through hole (not shown) is formed is formed at the lower end of the mount bracket 22 in the bending direction. The lower fixing portion 22C is fixed to the boss 32 by fastening the bolt 34 to the screw hole 32A through the through hole of the lower fixing portion 22C.

The other end 21 b of the mount bracket 21 is connected to the curved portion 22 </ b> A by a stud bolt 23 and a nut 24.
The bolt 33 that fixes the upper fixing portion 22B to the bulging portion 31 has an axis L1 extending in the vertical direction, and the bolt 34 that fixes the lower fixing portion 22C to the bulging portion 31 is the axial direction of the bolt 33. And an axis L2 extending in a direction perpendicular to the axis L2.

  The upper fixing portion 22B of the present embodiment constitutes the upper end portion of the second bracket of the present invention, and the lower fixing portion 22C constitutes the lower end portion of the second bracket of the present invention. An axis L1 extending in the vertical direction of the present embodiment constitutes an axis extending in a predetermined direction of the present invention. The bolt 33 of the present embodiment constitutes a first fastener, and the bolt 34 constitutes a second fastener of the present invention.

  That is, the upper fixing portion 22B of the mounting bracket 22 of the present embodiment is fixed to the upper surface 31a of the bulging portion 31 by the bolt 33 having the axis L1 extending in the vertical direction, and the lower fixing portion 22C of the mounting bracket 22 is The bolt 34 is fixed to the boss 32 by a bolt 34 having an axis L2 extending in a direction orthogonal to the axial direction of the bolt 34.

  Note that the upper fixing portion 22B and the lower fixing portion 22C may be fixed to the bulging portion 31 so that the axis of the bolt 33 is in the horizontal direction and the axis of the bolt 34 is in the vertical direction perpendicular to the horizontal direction.

  In FIG. 3, the inner cylinder 12 is installed above the vibration isolator 9 in the vertical direction of the vehicle 1. In FIG. 2, the other end 21b of the mount bracket 21 connected to the one end 22a of the mount bracket 22 is installed on the upper side of the bending portion 22A.

  The stud bolt 23 has an axis L <b> 3 extending in the vertical direction, and the other end 21 b of the mount bracket 21 is fixed to the curved portion 22 </ b> A by the stud bolt 23 and the nut 24. The stud bolt 23 and the nut 24 of the present embodiment constitute a third fastener of the present invention.

As shown in FIG. 4, when the vehicle 1 is viewed from above, the mount bracket 22 has one end 22 a on the mount bracket 21 side that is wider than the width of the other end 22 b on the engine cover 6 side in the front-rear direction of the vehicle 1. The width of the vehicle 1 in the front-rear direction is increased.
The vibration isolator 9 and the mount brackets 21 and 22 of the present embodiment constitute the support device 35 of the present invention.

Next, the operation will be described.
As shown in FIG. 7, for example, when the vibration isolator 9 and the mount bracket 42 are installed between the horizontal 4-cylinder engine 41 and the vehicle body frame 8, the distance between the engine 41 and the vehicle body frame 8 is short. Become.

  On the other hand, in order to downsize the engine, as shown in FIG. 8, for example, an anti-vibration device 9 and a mounting bracket 44 are installed between the laterally mounted three-cylinder engine 43 and the vehicle body frame 8. In this case, the distance between the engine 43 and the vehicle body frame 8 is increased.

  As a result, the distance between the fastening point of the vibration isolator 9 relative to the vehicle body frame 8 and the fastening point of the mount bracket 44 relative to the engine 43 is increased, and the bending moment applied to the mount bracket 44 due to the vibration of the engine 43 is increased. For this reason, the mount bracket 44 is likely to vibrate as the engine 43 vibrates.

  In the support device 35 of the present embodiment, a bulging portion 31 that bulges from the engine cover 6 toward the vehicle body frame 8 is formed in the engine cover 6, and a screw hole 31 </ b> A is formed in the upper surface 31 a of the bulging portion 31. In addition, a boss 32 having a screw hole 32 </ b> A is formed on the side surface in the vehicle width direction below the bulging portion 31.

  Furthermore, according to the support device 35 of the present embodiment, the mount bracket 22 includes an upper surface 31a and a screw hole of the bulging portion 31 in which the upper fixing portion 22B and the lower fixing portion 22C have screw holes 31A by bolts 33 and 34. It has a curved portion 22A that is fixed to the boss 32 having 32A and curves in a convex shape toward the vibration isolator 9 so as to sandwich the bulging portion 31 in the vertical direction, and the mount bracket 21 is connected to the curved portion 22A. ing.

  As a result, the other end portion 22b of the mount bracket 22 can be fixed to the bulging portion 31 having high rigidity at two locations, upper and lower, and the mount bracket 22 can be firmly fixed to the engine cover 6.

  Furthermore, by connecting the other end 21b of the mount bracket 21 to the curved portion 22A of the highly rigid mount bracket 22, the mount bracket 21 and the mount bracket 22 can be firmly connected.

  As a result, when the engine 2 vibrates, vibrations of the mount brackets 21 and 22 that connect the vibration isolator 9 and the bulging portion 31 of the engine cover 6 can be suppressed. For this reason, it is possible to easily suppress the vibration transmitted from the engine 2 via the mount brackets 21 and 22 from being attenuated by the anti-vibration rubber 11 and transmitted to the vehicle body frame 8.

  Further, according to the support device 35 of the present embodiment, the upper fixing portion 22B of the mount bracket 22 is fixed to the upper surface 31a of the bulging portion 31 having the screw hole 31A by the bolt 33 having the axis L1 extending in the vertical direction. The

  In addition, the lower fixing portion 22C of the mount bracket 22 is fixed to the boss 32 having the screw hole 32A by the bolt 34 having the axis L2 extending in the direction orthogonal to the axis direction of the bolt 33.

  Thereby, when the engine 2 vibrates in the vertical direction of the vehicle 1 and the longitudinal direction of the vehicle 1, an axial load can be applied to one of the bolts 33 and 34 having different axes. For this reason, it is possible to prevent a load in the shearing direction from being applied to at least one of the bolts 33 and 34 in the same vibration direction. For this reason, the mount bracket 22 can be firmly attached to the engine cover 6 while reducing the cross section of the bolts 33 and 34.

  As a result, when the engine 2 vibrates, the vibration of the mount bracket 22 that connects the vibration isolator 9 and the bulging portion 31 of the engine cover 6 can be more effectively suppressed. The transmitted vibration can be more effectively suppressed by the anti-vibration rubber 11.

  Further, according to the support device 35 of the present embodiment, the inner cylinder 12 is installed on the top of the vibration isolator 9 in the vertical direction of the vehicle 1 and the other end of the mount bracket 21 connected to the mount bracket 22. 21b is installed above the curved portion 22A. For this reason, it is not necessary to bend the mount bracket 21 in the vertical direction of the vehicle 1.

  In addition, the other end 21b of the mount bracket 21 is fixed to the curved portion 22A by a nut 24 fastened to a threaded portion of a stud bolt 23 having an axis L3 extending in the vertical direction of the vehicle 1. For this reason, the stud bolt 23 can be disposed near the bolt 33.

  Thereby, the mount bracket 21 and the mount bracket 22 can be formed in a structure that communicates between the vehicle body frame 8 and the engine cover 6 at the shortest distance.

  For this reason, the rigidity of the connection part of the mount bracket 21 and the mount bracket 22 can be increased, and it is more effective that the mount brackets 21 and 22 vibrate between the vehicle body frame 8 and the engine cover 6 as the engine 2 vibrates. Can be suppressed.

  Further, according to the support device 35 of the present embodiment, when the vehicle 1 is viewed from above, the mount bracket 22 is mounted more than the width of the other end 22b on the engine cover 6 side in the front-rear direction of the vehicle 1. The one end portion 22a on the bracket 21 side is formed so that the width in the front-rear direction of the vehicle 1 is increased.

  Thereby, the pitch of the stud bolt 23 which connects the mount bracket 21 and the mount bracket 22 can be made larger than before.

  For this reason, the rigidity of the connection site | part of the mount bracket 21 and the mount bracket 22 can be made high, and the vibration of the mount brackets 21 and 22 which connect the vibration isolator 9 and the bulging part 31 of the engine cover 6 can be suppressed. . As a result, vibration transmitted from the engine 2 to the vehicle body frame 8 can be more effectively suppressed by the vibration isolating rubber 11.

  While embodiments of the invention have been disclosed, it will be apparent to those skilled in the art that changes may be made without departing from the scope of the invention. All such modifications and equivalents are intended to be included in the following claims.

  DESCRIPTION OF SYMBOLS 1 ... Vehicle, 2 ... Engine (internal combustion engine), 6 ... Engine cover (side surface of engine width direction), 8 ... Body frame (body member), 9 ... Vibration isolator, DESCRIPTION OF SYMBOLS 11 ... Anti-vibration rubber (elastic body), 12 ... Inner cylinder (combustion engine side member), 20 ... Mount bracket, 21 ... Mount bracket (1st bracket), 22 ... Mount Bracket (second bracket), 22A ... curved portion, 22B ... upper fixing portion (upper end portion of second bracket), 22C ... lower fixing portion (lower end portion of second bracket), 23 ... Stud bolt (third fastener), 24 ... Nut (third fastener), 31 ... bulge, 31A ... screw hole (upper fastener), 31a ... Upper surface (upper fastening part), 32 ... boss (lower fastening part), 32A ... (lower fastening part), 33 ... bolt (first fastener), 34 ... bolt ( Second fastener), 35. .. Support device

Claims (4)

An internal combustion engine side member that is installed between the internal combustion engine and a vehicle body member that is installed on the side of the internal combustion engine in the vehicle width direction and that is connected to the internal combustion engine side is supported by the vehicle body member via an elastic body. An anti-vibration device,
A mounting bracket having one end connected to the internal combustion engine side member and the other end connected to a side surface in the vehicle width direction of the internal combustion engine;
The mounting bracket is a support device for an internal combustion engine for a vehicle divided into a first bracket connected to the internal combustion engine side member and a second bracket connected to a side surface in the vehicle width direction of the internal combustion engine,
A bulging portion bulging from the internal combustion engine toward the vehicle body member is formed on a side surface in the vehicle width direction of the internal combustion engine,
An upper fastening portion is formed on the upper surface of the bulging portion, and a lower fastening portion is formed on the side surface in the vehicle width direction of the lower portion of the bulging portion,
In the second bracket, the upper and lower ends of the second bracket are coupled to the upper fastening portion and the lower fastening portion, and the bulging portion is sandwiched in the vertical direction of the vehicle. It has a curved part that curves convexly on the vibration device side,
A support device for an internal combustion engine for a vehicle, wherein the first bracket is connected to the curved portion. An upper end portion of the second bracket is fixed to the upper fastening portion by a first fastener having an axis extending in a predetermined direction,
The lower end portion of the second bracket is fixed to the lower fastening portion by a second fastener having an axis extending in a direction orthogonal to the axial direction of the first fastener. 2. A support device for an internal combustion engine for a vehicle according to 1. The internal combustion engine side member is installed above the vibration isolator in the vertical direction of the vehicle,
An end of the first bracket connected to the second bracket is installed on the upper side of the curved portion;
The internal combustion engine support for a vehicle according to claim 2, wherein an end portion of the first bracket is fixed to the curved portion by a third fastener having an axis extending in a vertical direction of the vehicle. apparatus.   When the vehicle is viewed from above, the width of the end on the first bracket side of the second bracket is wider than the width of the end on the side surface side in the vehicle width direction of the internal combustion engine. 4. The vehicle internal combustion engine support device according to claim 3, wherein the support device is formed.