JP2010208420A - Suspension structure of vertical engine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To achieve compatibility between regulations in the longitudinal and horizontal directions of a vehicle of a power unit by stoppers arranged one by one respectively in each mount part in a suspension structure of a vertical engine mounting the power unit to a vehicle body by three points. <P>SOLUTION: At inside positions closer to the vertical engine 8 of the front side mount parts 14, 15 in horizontal positions, the front side stoppers 27, 31 regulating the relative movement of the vertical engine 8 in the width direction are arranged. These front side stoppers 27, 31 are arranged to regulate the relative movement of the vertical engine 8 in the width direction toward mutually opposite directions, and moreover, this regulating direction is arranged to have an inclination angle to the width direction of the vertical engine 8. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a vertical engine suspension structure, and more particularly to a vertical engine suspension structure in which a power unit equipped with a vertical engine is mounted on a vehicle body in a three-point manner.

In the vehicle vertical engine suspension structure, generally, as shown in FIG. 12, the vertical engine 108 in which the extending direction of the crankshaft 107 is aligned with the longitudinal direction X of the vehicle, and the vertical engine 108. When the power unit 106 including the transmission 109 provided at the rear of the vehicle is mounted on the vehicle body, the right engine bracket 112 and the left engine bracket at the left and right (vehicle left-right direction Y) positions of the vertical engine 108 positioned on the front side as the mount portion 111. A right front mounting portion 114 and a left front mounting portion 115 for mounting 113 and a rear mounting portion 116 for mounting a rear lower portion of the transmission 109 located on the rear side are disposed, and the power unit 106 is mounted on the vehicle body in a three-point manner. Mounted.
In addition, in the vertical engine suspension structure, if the power unit is greatly displaced in the left-right direction of the vehicle, it not only simply interferes with other parts, but also the load sharing on the left and right wheels changes. To affect. For example, if the power unit is greatly displaced in the vehicle front-rear direction, the attitude of the power unit when torque is transmitted changes, which affects acceleration and deceleration responsiveness. For this reason, while driving on general roads, there is no large load or displacement to the extent that the stopper exhibits its maximum capacity, but when off-road traveling or a large load is applied from the front of the vehicle, the displacement of the power unit is very large. Therefore, in order to avoid such a problem, a stopper for regulating the displacement amount is provided separately.

In Japanese Patent Application Laid-Open No. 55-101621, the reaction line of the reaction force of the front mount portion is inclined at a predetermined angle with respect to a vertical line passing through the engine in the front-rear direction and a vertical line passing through the engine in the left-right direction In addition, the front mounting portion is constructed between the both side surfaces of the engine and the vehicle body.

By the way, in the conventional vertical engine suspension structure, when the front mount portion and the rear mount portion are each provided with stoppers in a direction that restricts the left-right swing of the engine due to rotation of the crankshaft of the engine or the like. The swinging of the engine in the longitudinal direction of the vehicle due to a strong load or the like from the front of the vehicle could not be restricted.
For this reason, a separate stopper is added in the direction that restricts the swing in the vehicle front-rear direction, or the hardness of the mount rubber is increased to restrict the swing in the vehicle front-rear direction. However, the addition of a separate stopper causes an increase in the number of parts and increases the cost, and when the hardness of the mount rubber is increased, the spring constant increases and the sound vibration (NVH) performance deteriorates. there were.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to achieve both the regulation when the power unit is relatively moved in the longitudinal direction of the vehicle, the avoidance of an increase in the number of parts, and the prevention of the vibration preventing function of the power unit. It is to provide a vertical engine suspension structure.

  The present invention provides a mount portion for mounting a power unit comprising a vertical engine having a crankshaft extending in the longitudinal direction of the vehicle and a transmission provided behind the vertical engine to the vehicle body. Is composed of a front mount portion for mounting the left and right positions of the vertical engine located on the front side and a rear mount portion for mounting the rear lower portion of the transmission located on the rear side, and the power unit is attached to the vehicle body at three points. In the vertical engine suspension structure to be mounted by a type, a front stopper for restricting relative movement in the width direction of the vertical engine is provided at an inner position closer to the vertical engine of each of the left and right positions of the front mount portion, These front stoppers restrict relative movement in the width direction of the vertical engine in opposite directions. And arranged so that this regulation direction is characterized by providing to have an inclination angle with respect to the width direction of the Tate置 engine.

  The suspension structure for a vertical engine according to the present invention can avoid an increase in the number of parts and does not impair the vibration preventing function of the power unit.

It is a schematic plan view of the vehicle carrying a power unit. (Example 1) It is a rear view of a right front side mount part. (Example 1) It is a rear view of a left front side mounting part. (Example 1) It is a rear view of a rear mount part. (Example 1) It is a top view of the power unit at the time of rocking | fluctuating to the vehicle right side. (Example 1) FIG. 6 is a plan view of a right front mounting portion in a steady state without swinging the power unit of FIG. 5. (Example 1) FIG. 6 is a plan view of a right front mounting portion when the power unit of FIG. 5 swings to the right of the vehicle. (Example 1) It is a top view of the power unit at the time of rocking | fluctuating ahead of a vehicle. (Example 1) It is a top view of the right front side mounting part at the time of steady state without the power unit of FIG. 8 swinging. (Example 1) FIG. 9 is a plan view of a right front mounting portion when the power unit of FIG. 8 swings forward of the vehicle. (Example 1) It is a top view of a power unit. (Example 2) It is a top view of a power unit in the past. (Conventional example)

  The present invention achieves the purpose of avoiding an increase in the number of parts and not impairing the vibration preventing function of the power unit by restricting the power unit relative to the vehicle in the longitudinal direction.

1 to 10 show Embodiment 1 of the present invention.
In FIG. 1, 1 is a vehicle and 2 is a vehicle body. The vehicle body 2 is horizontally mounted on a pair of right side frame 3 and left side frame 4 extending in the vehicle front-rear direction X and the right side frame 3 and left side frame 4 and extends in the vehicle left-right direction (vehicle width direction) Y. And a cross member 5.
A power unit 6 is installed on the vehicle body 2.
The power unit 6 includes a vertical engine 8 that extends in the vehicle front-rear direction X along the extending direction of the crankshaft 7, and a transmission 9 that is provided behind the vertical engine 8.
The power unit 6 is mounted (elastically supported) in a three-point manner on the vehicle body 2 by the mount portion 11 of the suspension device 10.

This mount portion 11 is a right front side as a front side mount portion for mounting the right engine bracket 12 and the left engine bracket 13 at the left and right positions of the vertical engine 8 positioned on the front side to the right side frame 3 and the left side frame 4 of the vehicle body 2. The mounting portion 14 includes a left front mounting portion 15 and a rear mounting portion 16 that mounts the rear lower portion of the transmission 9 positioned on the rear side on the cross member 5 of the vehicle body 2.
The mount unit 11 mounts the power unit 6 to the vehicle body 2 by a three-point system including a left front mount unit 14, a right front mount unit 15, and a rear mount unit 16.

As shown in FIG. 2, the right front mounting portion 14 includes a cylindrical and elastic right front mounting rubber 17 having no directivity, and a right front vehicle body attached to the right side frame 3 below the right front mounting rubber 17. An iron right front lower member 19 having a mounting portion (two pins) 18 and an iron right front side having a right front engine mounting portion (one pin) 20 above the right front mounting rubber 17. It consists of an upper member 21. The right engine bracket 12 of the vertical engine 8 is attached to the right front engine attachment portion 20.
As shown in FIG. 3, the left front side mounting portion 15 includes a left-side front mounting rubber 22 that is cylindrical and elastic with no directivity, and a left front that is attached to the left side frame 4 below the left front-side mounting rubber 22. An iron left front lower member 24 provided with a side vehicle body mounting portion (two pins) 23 and an iron left front engine mounting portion (one pin) 25 above the left front mounting rubber 22. It consists of a left front upper member 26. The left engine bracket 13 of the vertical engine 8 is attached to the left front engine attachment portion 25.

As shown in FIG. 2, an inner position of the right front mount portion 14 near the vertical engine 8 serves as one front stopper that restricts the relative movement of the vertical engine 8 in the width direction (vehicle left-right direction Y). A right front stopper 27 is provided.
The right front side stopper 27 can regulate only one direction of the vehicle left-right direction Y, and the elastic front right of the right front side mounting rubber 17 protrudes to the left of the vehicle left-right direction Y (vehicle inside: crankshaft 7 side). A right stopper rubber 28 and a right front bent portion 29 extending from the right front upper member 21 and surrounding the right front stopper rubber 28 to be curved in a C shape and from the outer surface of the right front stopper rubber 28 in a steady state. It comprises an iron front right stopper member 30 separated by a predetermined distance (gap size) S1. The right front stopper member 30 can be regulated in the vertical direction because the C-shaped right front bent portion 29 surrounds the right front stopper rubber 28 in the upper, lateral, and lower directions.

Further, as shown in FIG. 3, another front-side stopper that restricts the relative movement of the vertical engine 8 in the width direction (the vehicle left-right direction Y) is located at the inner position of the left front mount 15 close to the vertical engine 8. A left front stopper 31 is provided.
The left front stopper 31 can regulate only one direction in the vehicle left-right direction Y, and is an elastic left front that protrudes to the right of the left front mount rubber 22 in the vehicle left-right direction Y (the vehicle inner side: the crankshaft 7 side). A left stopper rubber 32 and a left front bent portion 33 extending from the left front upper member 26 and surrounding the left front stopper rubber 32 so as to be curved in a C shape and from the outer surface of the left front stopper rubber 32 in a steady state. It comprises an iron left front stopper member 34 separated by a predetermined distance (gap size) S1. The left front stopper member 34 can be regulated in the vertical direction because the C-shaped left front bent portion 33 surrounds the left front stopper rubber 32 in the upper, lateral, and lower directions.

The right front stopper 27 and the left front stopper 31 are disposed so as to restrict relative movement of the vertical engine 8 in the width direction (vehicle left-right direction Y) in opposite directions, and this restricting direction is the width of the vertical engine 8. It is provided so as to have an inclination angle with respect to the direction.
Specifically, as shown in FIG. 2, in the right front side mount portion 14, the upper part of the right front side mount rubber 17 is provided to be inclined by a predetermined angle θ <b> 1 toward the vehicle inner side (the vehicle left side: the crankshaft 7 side). . Further, as shown in FIG. 1, the inclination angle of the right front side stopper 27 is given by a constant rotation angle θ2 (about 30 degrees) around the right front side mounting rubber 17.
Further, in the left front side mounting portion 15, as shown in FIG. 3, the upper part of the left front side mounting rubber 22 is provided to be tilted by a predetermined angle θ1 toward the vehicle inner side (the vehicle right side: the crankshaft 7 side). Further, as shown in FIG. 1, the inclination angle of the left front stopper 31 is given by a constant rotation angle θ2 (about 30 degrees) around the left front mount rubber 22.
The predetermined angle θ1 is, for example, about 10 degrees, and is an angle given for efficiently suspending the longitudinal engine 8, and the right front stopper rubber of the right front stopper member 30 and the left front stopper member 34 is provided. 28. It affects the way to hit the left front stopper rubber 32. As a result, the anti-vibration properties of the right front mounting rubber 17 and the left front mounting rubber 22 are not directional, so that both the vehicle longitudinal direction X and the vehicle lateral direction Y have the same level of vibration isolating performance.

  Further, the right front stopper 27 and the left front stopper 31 are respectively installed in directions rotated counterclockwise at a constant angle θ2 (about 30 degrees) in a plan view of FIG. 1 from the direction facing the vertical engine 8 side. . Thereby, the regulation in the vehicle left-right direction Y can be made larger than the regulation in the vehicle longitudinal direction X. In addition, the inclination angle of the right front stopper 27 and the left front stopper 31 is determined by geometrically dividing the displacement dimension into directional components. The movement amount of 8 tends to increase. In other words, the load range shifts so as to be regulated from a larger load in the vehicle left-right direction Y. Therefore, when viewed as a cylindrical mount unit integrated with the right front stopper 27 and the left front stopper 31, the gap size S1 (the right front stopper rubber 28 and the right front stopper) regulated by the right front stopper 27 and the left front stopper 31 is considered. Even if the gap dimension S1 between the members 30 and the gap dimension S1) between the left front stopper rubber 32 and the left front stopper member 34 are reduced, the same degree of stopper regulation is possible. The cylindrical right front mounting rubber 17 and left front mounting rubber 22 can be made compact.

  Further, the right front mounting rubber 17 and the left front mounting rubber 22 are arranged on the left side and the right side of the vertical engine 8 so that the relative movement in the width direction (vehicle left-right direction Y) of the vertical engine 8 is restricted in the opposite direction. In addition, the regulation direction is provided so as to have an inclination angle with respect to the width direction (vehicle left-right direction Y). For this reason, the mount unit composed of the cylindrical right front mount rubber 17 and the left front mount rubber 22 can be made compact.

As shown in FIG. 4, the rear mount portion 16 has a U-shaped cross section extending in the vehicle left-right direction Y, and includes an iron vehicle body mounting bracket 37 having a right side mounting nut 35 and a left side mounting nut 36, and the vehicle body mounting bracket. An iron right inclined member 38 and left inclined member 39 inclined at a predetermined angle θ3 toward the vehicle inner side (crankshaft 7 side) with respect to the horizontal line H at both ends of the bracket 37, and the right inclined member 38 and left inclined member 39, respectively. A pair of left and right right rear mounting rubber 40 and left rear mounting rubber 41 made of an elastic body whose lower side surface is fixed to the upper surface, and a right rear portion extending in the left-right direction Y of the vehicle and a right step portion 42 and a left step portion 43. An upper bracket 44 made of iron that fixes the upper surface of the mounting rubber 40 and the left rear mounting rubber 41, and a portion recessed downward between the right step portion 42 and the left step portion 43 of the upper bracket 44. And a steel of the transmission support bracket 45. provided.
That is, the pair of left and right right rear mounting rubber 40 and left rear mounting rubber 41 is inclined such that the upper part of the right rear mounting rubber 40 and left rear mounting rubber 41 tilts toward the vehicle inner side (crankshaft 7 side) at an angle θ3. Thus, the mounting unit 46 is provided symmetrically.

In the rear mount portion 16, a right rear stopper 47 and a left rear stopper 48 are provided at the left and right outer positions of the mount unit 46 as rear stoppers that restrict displacement in the vehicle left-right direction.
The right rear stopper 47 and the left rear stopper 48 are installed in a direction that restricts the swing of the longitudinal engine 8 in the vehicle left-right direction Y.
The right rear stopper 47 is curved so as to surround the right rear stopper rubber 49 extending from the right end of the vehicle body mounting bracket 37 and the elastic right rear stopper rubber 49 attached to the right end of the upper bracket 44 and in a steady state. And an iron right rear stopper member 51 having a right rear bent portion 50 which is separated from the outer surface of the right rear stopper rubber 49 by a predetermined distance S2 and is curved in a C shape.
The left rear stopper 48 is curved so as to surround the left rear stopper rubber 52 extending from the left end of the elastic left rear stopper rubber 52 attached to the left end of the upper bracket 44 and the vehicle body mounting bracket 37 and in a steady state. The left rear stopper member 54 is provided with a left rear bent portion 53 that is curved in a C-shape and separated from the outer surface of the left rear stopper rubber 52 by a predetermined distance S2.
The right rear side stopper member 51 and the left rear side stopper member 54 have a right rear side bent portion 50 and a left rear side bent portion 53 which are bent in a C shape, and the right rear side stopper rubber 49 and the left rear side stopper rubber 52 are positioned upward.・ Because it is enclosed horizontally and below, it is possible to restrict the vertical direction.

As shown in FIG. 5, for example, when the power unit 6 swings to the right in the vehicle left-right direction Y, the right front side of the right front side mount portion 14 and the left front side mount portion 15 installed on the left and right sides of the vertical engine 8. The movement of the power unit 6 is restricted by the stopper 27 and the left front stopper 31 and the right rear stopper 47 and the left rear stopper 48 of the rear mount portion 16 installed at the rear lower part of the transmission 9.
In this case, for example, the right front mount portion 14 will be described as an example. When the power unit 6 does not swing and swings to the right in the vehicle left-right direction Y from the steady state (see FIG. 6), FIG. As shown, the right front stopper member 30 abuts against the right front stopper rubber 28 to elastically prevent the power unit 6 from swinging and restrict its movement.
Further, as shown in FIG. 8, for example, when the power unit 6 swings forward in the vehicle longitudinal direction X, the right front side of the right front side mounting part 14 and the left front side mounting part 15 installed on the left and right sides of the longitudinal engine 8. The movement of the power unit 6 is restricted by the side stopper 27 and the left front stopper 31.
In this case, for example, the right front mounting portion 14 will be described as an example. When the power unit 6 does not swing and swings forward in the vehicle longitudinal direction X from the steady state (see FIG. 9), it is shown in FIG. Thus, the right front stopper member 30 abuts against the right front stopper rubber 28 to elastically prevent the power unit 6 from swinging and restrict its movement.

Although the first embodiment of the present invention has been described above, the configuration of the above-described first embodiment will be described for each claim.
According to the first aspect of the present invention, the right front side stopper 27 that restricts the relative movement in the width direction of the vertical engine 8 is provided at the inner position of the right front side mount portion 14 and the left front side mount portion 15 near the vertical engine 8. A left front stopper 31 is provided, and the right front stopper 27 and the left front stopper 31 are disposed so as to restrict relative movement in the width direction of the vertical engine 8 in opposite directions, and this restriction direction is the vertical engine 8. It was provided to have an inclination angle with respect to the width direction.
Accordingly, the vehicle front-rear direction X and the vehicle left-right direction Y can be made compatible by the respective stoppers provided one by one on the right front side mount portion 14, the left front side mount portion 15, and the rear side mount portion 16, respectively.
In the invention according to claim 2, the right front mounting portion 14 and the left front mounting portion 15 include a cylindrical right front mounting rubber 17 and a left front mounting rubber 22 having no directivity, and the right front mounting rubber 17 and the left front side. The upper part of the mount rubber 22 is provided to be tilted to the vehicle inner side (crankshaft 7 side) by a predetermined angle θ1 (about 10 degrees), and the right front stopper 27 and the left front stopper 31 are inclined at the right front mount rubber 17 and the left front, respectively. The rear mount portion 16 includes a pair of left and right right rear mount rubbers 40 and left rear mount rubber 41, and these right rear mounts are provided at a constant rotation angle θ2 (about 30 degrees) around the side mount rubber 22. The rubber 40 and the left rear mounting rubber 41 are symmetrically provided by tilting the upper part of the right rear mounting rubber 40 and the left rear mounting rubber 41 to the inside of the vehicle at an angle θ3. Provided as knit 46, it is provided with a right rear stopper 47, the left rear side stopper 48 for restricting the displacement in the vehicle left-right direction of the respective power unit 6 on the left and right sides outward position of the mounting unit 46.
As a result, the right front mounting portion 14, the left front mounting portion 15, and the rear mounting portion 16 have a simple configuration, and the three front right mounting portions 14, the left front mounting portion 15, and the rear mounting portion 16 are combined. , And can regulate the excessive displacement efficiently.

FIG. 12 shows Embodiment 2 of the present invention.
In the second embodiment, portions having the same functions as those of the first embodiment will be described with the same reference numerals.
The features of the second embodiment are as follows. That is, in the right front side mount portion 14 and the left front side mount portion 15, the right front side mount portion 14 is disposed in the vehicle left-right direction Y so as to serve as a stopper that restricts the swing in the vehicle left-right direction Y. The left front side mounting portion 15 is disposed in the vehicle longitudinal direction X so as to serve as a stopper for restricting the swing in the vehicle longitudinal direction X.
Thereby, rocking | fluctuation of the power unit 6 of the vehicle front-back direction X and the vehicle left-right direction Y can be controlled effectively.

  In the present invention, by setting the stoppers of the right front side mount portion 14 and the left front side mount portion 15 to the positions rotated in the direction of the exhaust system parts, the heat radiated from the exhaust system parts is received by each stopper. It can block and improve the durability of each mount rubber.

  The vertical engine suspension structure according to the present invention can also be applied to various vehicles equipped with an engine other than the vertical engine.

DESCRIPTION OF SYMBOLS 1 Vehicle 2 Car body 6 Power unit 8 Vertical engine 9 Transmission 10 Suspension device 11 Mount part 14 Right front side mount part 15 Left front side mount part 16 Rear side mount part 17 Right front side mount rubber 22 Left front side mount rubber 27 Right front side stopper 28 Right front side Stopper rubber 30 Right front side stopper member 31 Left front side stopper 32 Left front side stopper rubber 34 Left front side stopper member 40 Right rear side mounting rubber 41 Left rear side mounting rubber 46 Mount unit 47 Right rear side stopper 48 Left rear side stopper 49 Right rear side Stopper rubber 51 Right rear stopper member 52 Left rear stopper rubber 54 Left rear stopper member

Claims (2)

  There is a mount part that mounts the power unit consisting of a longitudinal engine with the crankshaft extending in the longitudinal direction of the vehicle and a transmission provided behind the longitudinal engine to the vehicle body, and this mount part is located on the front side. The power unit is mounted on the vehicle body in a three-point manner, comprising a front mount portion for mounting the left and right positions of the vertical engine and a rear mount portion for mounting the rear lower portion of the transmission located on the rear side. In the vertical engine suspension structure, a front stopper for restricting relative movement in the width direction of the vertical engine is provided at an inner position near the vertical engine at each of the left and right positions of the front mount portion. Arranged so as to restrict relative movement in the width direction of the vertical engine in opposite directions. And suspension structure of Tate置 engine this regulation direction is characterized by providing to have an inclination angle with respect to the width direction of the Tate置 engine.   The front mount portion includes a cylindrical front mount rubber having no directivity, and an upper portion of the front mount rubber is provided so as to be inclined at a predetermined angle toward the inside of the vehicle, and an inclination angle of the front stopper is set around each of the front mount rubbers. The rear mount is provided with a pair of left and right rear mount rubbers, and these rear mount rubbers are provided symmetrically with the upper portion of the rear mount rubber tilted inward of the vehicle. The suspension of a vertical engine according to claim 1, wherein rear mounts for restricting displacement of the power unit in the vehicle left-right direction are provided at outer positions on both left and right sides of the mount unit. Construction.

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