JPH0565029A - Power unit support device - Google Patents

Abstract

PURPOSE:To provide a power unit support device which makes reduction of idle vibration compatible with improvement of a riding feeling. CONSTITUTION:A center mount 31 is formed of a resilient member, and is brought into pressure contact with both a power unit 21 and a center member 24. The center mount can be rolled owing to relative movement between the power unit 21 and the center member 24 approximately in a horizontal direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power unit supporting device, and more particularly to a power unit supporting device having a center mount.

[0002]

2. Description of the Related Art As a conventional power unit supporting device equipped with a center mount, for example, a full-length shokai 60-8432 is available.
The one described in Japanese Patent Publication No. 1 is known, and is shown as in FIG. In FIG. 6, the power unit 1 is supported by a center member 5 via a front engine mount 2, a rear engine mount 3 and a center mount 4. The center mount 4 is generally composed of an elastic member and a pair of brackets (not shown) vulcanized and bonded to the upper and lower surfaces of the elastic member. The brackets are fixed to the power unit 1 and the center member 5 by bolts or the like. Has been done.

The arrangement of the mounts of the power unit supporting device having the center mant as described above is shown in FIG.
It is shown in FIG. 8 (top view). 7 and 8, 11 to
14 is an engine mount interposed between the side end of the power unit 10 and the side member 16, and 15 is a center mount interposed between the power unit 10 and the center member 17.
Is an example in which the side edges of the power unit 10 are supported at three points,
FIG. 8 shows an example in which the side ends of the power unit 10 are supported at four points.

[0004]

However, in the conventional power unit supporting device, it was very difficult to reduce idle vibration and improve riding comfort at the same time for the reasons described below. In other words, to reduce idle vibration, it is effective to reduce the spring force of the engine mounts at the front and rear of the vehicle, and to reduce the shake of the power unit, harden the entire engine mount to increase the spring force for vertical input. It is known that increasing the value will have an effect. In order to achieve both of these, the power unit support device described above has an engine mount.
By reducing the spring force of 11 to 14 to reduce the spring force,
The center mount 15 supplements the vertical input, but since the elastic member of the center mount 15 is connected to the power unit 10 and the center member 17 via the bracket, the spring against the vertical input of the elastic member is used. When the force is increased, the vibration of the power unit 10 in the horizontal direction and the front-rear direction (engine roll direction) causes the center member 17 to vibrate.
It cannot be prevented from being transmitted to. Therefore, it is extremely difficult to achieve both reduction of idle vibration and improvement of riding comfort.

Therefore, it is an object of the present invention to provide a power unit supporting device capable of achieving both reduction of idle vibration and improvement of riding comfort.

[0006]

In order to solve the above problems, the invention according to claim 1 has three or more engines which are interposed between a power unit and a power unit supporting member and which are arranged in the vicinity of a side end portion of the power unit. In a power unit supporting device provided with a mount and a center mount disposed inside a line connecting the engine mounts in an adjoining order, the center mount being interposed between a lower portion of the power unit and the power unit supporting member, wherein the center mount includes an elastic member. It is characterized in that it is configured to be in pressure contact with both the power unit and the power unit support member, and to roll by relative movement of the power unit and the power unit support member in a substantially horizontal direction.

According to the second aspect of the present invention, three or more engine mounts disposed between the power unit and the power unit supporting member and arranged in the vicinity of the side end portions of the power unit, and each engine mount are attached to the side end portions of the power unit. In a power unit supporting device, which is arranged inside a line connecting in sequence along the section, and which includes a center mount interposed between the lower part of the power unit and the power unit supporting member, the center mount is one of the power unit and the power unit supporting member. A bracket supported on one side, a tubular elastic member that presses against the other of the power unit and the power unit support member, a bearing having an inner ring connected to the bracket and an outer ring fixed to the inner peripheral surface of the tubular elastic member Is characterized by having .

[0008]

According to the first aspect of the invention, the center mant rolls when the power unit and the power unit supporting member move relative to each other in the horizontal direction, so that the vibration of the power unit in the horizontal direction and the front-back direction (engine roll direction) is generated. It is prevented from being transmitted to. In addition, the center mount made of an elastic member is pressed against the power unit and the power unit support member,
The load of the power unit is reliably supported by the center mount. Therefore, both transmission of idle vibration and shaking of the power unit can be reduced.

According to the second aspect of the present invention, when the power unit and the power unit supporting member are relatively moved in the horizontal direction, the cylindrical elastic member of the center mount rolls with respect to the power unit or the power unit supporting member, so that the power unit is moved in the horizontal direction. Also, vibration in the front-rear direction (engine roll direction) is prevented from being transmitted to the power unit support member. Further, the load of the power unit is reliably supported by the center mount by the cylindrical elastic member of the center mount being pressed against the power unit or the power unit support member. Therefore, both transmission of idle vibration and shaking of the power unit can be reduced.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. 1 to 3 are views showing an embodiment of a power unit supporting device according to the invention described in claim 1. First, the configuration will be described.

1 to 3, reference numeral 21 is a power unit, and the power unit 21 is composed of an engine 22 and a transmission 23. 24 is a center member, 25 and 26 are side members, and these members are vehicle body side members (power unit support members). Engine mounts 27 to 30 are interposed between the center member 24, the side members 25 and 26, and the power unit 21. Further, each of the engine mounts 27 to 30 is arranged in the vicinity of the four side ends of the power unit 21.
Especially, the spring force of the front and rear engine mounts 28, 30 is set to be small.

Reference numeral 31 is a center mount, and the center mount 31 is arranged inside a line (two-dot chain line in FIG. 3) L connecting the engine mounts 27 to 30 in the order of adjacency. The center mount 31 is interposed between the lower portion of the power unit 22 and the center member 24. The center mount 31 is made of a spherical rubber material (elastic member), and is pressed against both the power unit 21 and the center member 24 via brackets 32 and 33, respectively. Further, the center mount 31 rolls due to the relative movement of the power unit 21 and the center member 24 in the substantially horizontal direction. The brackets 32 and 33 have arcuate surfaces facing each other, and are fixed to the power unit 21 and the center member 24. The brackets 32 and 33 position the center mount 31 and prevent the center mount 31 from falling off. It The shape of the center mount 31 is not limited to the shape of this embodiment, and may be any shape as long as it can roll between the power unit 21 and the center member 24, and may be, for example, a polygonal shape. Further, the hardness may be adjusted by embedding resin or metal in the rubber material forming the center mount 31. Further, when the spring force of one center mount 31 is insufficient, a plurality of center mounts 31 may be provided.

According to the above configuration, when the power unit 21 and the center member 24 relatively move in the horizontal direction, the center mant 31 rolls, so that the power unit 21
It is possible to prevent the horizontal vibration of the above from being transmitted to the center member 24. In addition, the center mount 31 arranged in the lower part near the center of the power unit 21 is
Further, since it is pressed against the center member 24, the center mount 31 can reliably support the load of the power unit 21. Therefore, both reduction of idle vibration and improvement of riding comfort can be achieved.

More specifically, as described above, in order to reduce the idle vibration, it is effective to soften the front and rear engine mounts 28 and 30, and to reduce the shake of the power unit 21, harden the entire engine mount. It is known that increasing the spring force for vertical input is effective. In the present embodiment, the center mant 31 escapes by rolling with respect to inputs in the horizontal direction and the front-rear direction (engine roll direction), so that the effect of softening the spring force of the front and rear engine mounts 28, 30 can be utilized as it is. Therefore, the transmission of idle vibration can be prevented. On the other hand, by providing the center mount 31, the spring force in the vertical direction of the entire engine mount can be increased, so that the shake of the power unit 21 can be reduced and the riding comfort can be improved.

FIG. 4 and FIG. 5 are views showing an embodiment of the power unit supporting device according to the invention of claim 2. In FIGS. 4 and 5, the same components as those of the embodiment shown in FIGS. 1 to 3 are designated by the same reference numerals and the description thereof will be omitted. 41 is a center mount, and the center mount 41
Is arranged at the same position as the center mount 21 in FIG. The center mount 41 is composed of a bracket 42, a tubular elastic member 43, and a bearing 44. The bracket 42 is fixed to the center member 24 by bolts, and the tubular elastic member 43 is in pressure contact with the power unit 21. The bearing 44 has an inner ring 44a connected to the bracket 41 via a bolt 45 and an outer ring 44b fixed to the inner peripheral surface of the tubular elastic member 43. Of course, the inner ring 44a and the outer ring 44b.
A plurality of rolling members are inserted between them. The cylindrical elastic member 43 and the bearing 44 are fixed to each other by vulcanizing or bonding the cylindrical elastic member 43 to the outer ring 44b, or by pressing the bearing 44 into the inner diameter of the cylindrical elastic member 43. Etc. Note that, contrary to the above-described configuration, the bracket 42 is supported by the power unit 21, and the tubular elastic member 43 is provided.
May be pressed against the center member 24.

According to the above-mentioned structure, when the power unit 21 and the center member 24 relatively move in the horizontal direction, the center mant 41 rolls with respect to the power unit 21. It can be prevented from being transmitted to the member 24. Further, since the tubular elastic member 43 of the center mount 42 arranged in the lower part near the center of the power unit 21 is in pressure contact with the power unit 21, the center mount 41 can reliably support the load of the power unit 21. Therefore, it is possible to achieve both reduction of idle vibration and improvement of riding comfort, as in the above-described embodiment. Further, in this embodiment, the center mount 41 is fixed to either the power unit 21 or the center member 24, so that the reliability can be improved.

[0017]

According to the present invention, in response to horizontal and longitudinal inputs (engine roll direction), the center mount itself can roll or the tubular elastic member of the center mount can escape. It is possible to use the effect of reducing the spring force of other engine mounts, and because the load of the power unit is supported by the center mount, even if the spring force of other engine mounts is softened, the entire mount can be softened. It is possible to increase the spring force with respect to the input / output in the vertical direction to reduce the shake of the power unit, and it is possible to reduce idle vibration and improve riding comfort.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of an essential part showing an embodiment of a power unit supporting device according to the invention of claim 1.

FIG. 2 is a schematic front view of the entire power unit supporting device in FIG.

3 is a schematic top view of the entire power unit supporting device in FIG.

FIG. 4 is a sectional view of an essential part showing an embodiment of a power unit supporting device according to the invention as defined in claim 2;

5 is a sectional view taken along the line YY in FIG.

FIG. 6 is a side view of a conventional power unit support device.

FIG. 7 is a schematic top view showing an arrangement of mounts of a conventional power unit supporting device.

FIG. 8 is a schematic top view showing another example of the arrangement of the mounts of the conventional power unit supporting device.

[Explanation of symbols]

 21 Power unit 24 Center member (power unit support member) 25, 26 Side member (power unit support member) 27 to 30 Engine mount 31, 41 Center mount 42 Bracket 43 Cylindrical elastic member 44 Bearing 44a Bearing inner ring 44b Bearing outer ring

Claims (2)

[Claims] 1. A power unit, which is disposed between a power unit and a power unit support member and is disposed inside a line connecting three or more engine mounts arranged in the vicinity of a side end portion of the power unit and in the order of adjoining each engine mount. And a center mount interposed between the lower part of the power unit and the power unit support member, wherein the center mount is made of an elastic member and is in pressure contact with both the power unit and the power unit support member, and And a power unit supporting member which rolls by relative movement of a power unit supporting member in a substantially horizontal direction. 2. A three or more engine mounts interposed between the power unit and the power unit support member and arranged near the side end of the power unit, and a line connecting the engine mounts in order along the side end of the power unit. In a power unit supporting device provided inside, a center mount interposed between the lower part of the power unit and the power unit supporting member, wherein the center mount is a bracket supported by one of the power unit and the power unit supporting member, A cylindrical elastic member that is in pressure contact with the other of the power unit and the power unit support member, and a bearing having an inner ring connected to the bracket and an outer ring fixed to the inner peripheral surface of the cylindrical elastic member. Power unit support device.