JPH04191126A - Engine mount - Google Patents

Abstract

PURPOSE:To reduce an idle vibration by connecting an installing member provided on a torque roll shaft and the other end of a rod whose one end is installed on a mount at the body side, and enabling relative operation to the rolling and pitching operation of an engine. CONSTITUTION:An installing member 15 is composed of a cylindrical member 21 and a supporting piece, and a bearing member 24 is inserted rotatable to the cylindrical member 21. A shaft 26 is inserted to the insertion hole 25 of the bearing member 24, and a circular projection 26b is fitted and installed to a circular recess 25b. To both sides of this shaft 26, the permeation hole 18a of the lower holding piece 18 of a rod 16 whose one end is held at a body side mount 8 is inserted to install an installing rubber cap 28. In such a constitution, the bearing member 24 and the shaft 26 are moving relatively to the rolling and pitching operation of the engine. Consequently, a power unit 3 is made only rotating around a torque roll shaft A.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an engine mount used for supporting a power unit consisting of an automobile engine, transaxle, etc. on a vehicle body.

[Prior Art] Conventionally, for example, in a front-wheel drive vehicle with a horizontally mounted engine, when torque about the crankshaft acts on the engine, the engine tends to rotate around the torque roll axis. For this reason, in Utility Model Application Publication No. 57-135426,
As shown in FIG. 13, a technique is disclosed in which a pair of left and right engine mounts 54 and 55 are arranged on a torque roll axis A passing through a power unit 53 consisting of an engine 51 and a transaxle 52. In this way, the power unit 53 only rotates and vibrates around the torque roll axis A, and does not induce rotational vibrations or translational vibrations (vibrations that occur in the direction that intersects the torque roll axis A) around other axes. Vibration can be reduced.

[Problem to be solved by the invention] However, in actual automobiles, due to space limitations in the engine room, the left and right engine mounts 5
It is difficult to arrange both 4.55 and 4.55 on the torque roll axis A.

The present invention has been made in view of the above-mentioned circumstances, and its purpose is to make it possible to substantially support a power unit on its torque roll axis even when there is a space restriction, and to reduce the amount of torque generated by the power unit. An object of the present invention is to provide an engine mount that can prevent vibrations caused by vibrations from being transmitted to a vehicle body, and can particularly effectively reduce idling vibrations.

[Means for Solving the Problems] In order to achieve the above object, the engine mount of the present invention includes a mounting member that is substantially mounted on the torque roll shaft of a power unit including an engine, the mounting member, and the torque roll. A rod connecting the body side mount installed at a position apart from the axis, and a movable member capable of relative movement with respect to the roll motion and pitch motion of the engine is provided at the connection portion between the rod and the mounting member. ing.

[Operation] The rod of the engine mount connects a mounting member substantially mounted on the torque roll axis of the power unit and a body-side mount installed at a position spaced apart from the torque roll axis. Therefore, the engine can be supported on the torque roll shaft via the rod regardless of the installation position of the body side mount.

Further, even if the engine causes roll motion or pitch motion, vibrations caused by these motions are absorbed by the movable member and are prevented from being transmitted to the body side mount.

[First Embodiment] A first embodiment embodying the present invention will be described below with reference to FIGS. 1 to 4.

FIG. 3 shows the support structure for the power unit 3 seen from the front in the direction of travel of the automobile, and FIG. 4 shows the support structure seen from above. This power unit 3 includes an engine 1 placed horizontally in an engine room, and a transaxle 2 connected to the left side of the engine 1.

Here, the left and right in this embodiment refer to the left and right when the power unit 3 is viewed from the rear in the direction of travel of the automobile. Therefore, the left and right sides in Figures 3 and 4 are reversed, that is, the left side is on the right side, and the right side is on the left side. Note that the transaxle 2 is a unit in which a transmission and a final drive gear are assembled into one case.

The front lower part and the rear lower part of the transaxle 2 are supported by the vehicle body 6 by a front mount 4 and a rear mount 5. Further, the right side of the engine 1 is supported by the vehicle body 6 by a right mount 7 disposed on the torque roll axis A of the power unit 3.

Further, the left side of the transaxle 2 is supported by the vehicle body 6 by an engine mount 9. The engine mount 9 includes a body side mount 8 installed at a position spaced upward from the torque roll axis A due to space limitations, and a mounting member 15 attached to the left side of the transaxle 2 through which the torque roll axis A passes. , the body side mount 8
and a rod 16 that connects the mounting member 15.

As shown in FIG. 1, the body-side mount 8 includes two cylindrical sleeves 10, 11 with different diameters. Both sleeves 10.11 are connected by a mounting rubber 13 having a cavity 12 at the top and bottom. Small diameter sleeve 10
A cylindrical support shaft 14 is inserted inside the support shaft 14.
The front and rear ends of the sleeve protrude slightly from the sleeve lO. This protruding portion is connected to the rod 16.

As shown in FIGS. 1 and 2, a pair of upper clamping pieces 17 are formed at the upper end of the rod 16 and extend upward in parallel from front to back. Similarly, a pair of lower clamping pieces 18 are formed at the lower end of the rod 16 and hang down in parallel from side to side. Each of the upper and lower holding pieces 17 and 18 has a through hole 1.
7a and 18a are opened. Both ends of the support shaft 14 of the body side mount 8 are inserted into the through hole 17a of the upper clamping piece 17. The rod 16 is fixed to the body-side mount 8 by a bolt 19 inserted through the support shaft 14 and a nut 20 screwed onto the bolt 19.

On the other hand, the mounting member 15 has a cylindrical portion 2 with open left and right sides.
1, and a pair of support pieces 22 extending from the outer peripheral surface of the cylindrical portion 21 in both front and rear directions. The ends of both support pieces 22 are bent toward the transaxle 2, and a bolt insertion hole 22a is provided in the bent portion. and,
The mounting member 15 is fastened to the left side of the transaxle 2 by bolts 23 inserted into each bolt insertion hole 22a.

A bearing member 24 is rotatably fitted into the cylindrical portion 21 of the mounting member 15. The bearing member 24 has a substantially cylindrical shape with both left and right ends open. The insertion hole 25 inside the bearing member 24 has a pair of left and right tapered portions 25a whose inner diameter is reduced.
and a curved annular recess 25b formed between both tapered parts 25a.

A shaft 26 is inserted into the bearing member 24 . Both left and right ends of the coaxial shaft 26 protrude from the bearing member 24 and are inserted and fixed into the through hole 18a of the lower clamping piece 18. axis 26
has a substantially cylindrical shape with both left and right ends open, and a curved annular protrusion 26a is formed at the center of its outer peripheral surface. A synthetic resin cover 27 is placed over the annular protrusion 26a.

When the shaft 26 is inserted into the bearing member 24, the outer peripheral surface of the cover 27 is inserted into the annular recess 25b of the bearing member 24.
is in contact with.

In this embodiment, the bearing member 24, the shaft 26, and the cover 27 constitute a movable member that can move relative to the roll motion and pitch motion of the engine 1. That is, the contact portion between the inner circumferential surface of the cylindrical portion 21 and the outer circumferential surface of the bearing member 24 serves as a first movable portion C that absorbs vibrations caused by the roll motion of the engine 1. Further, the contact portion between the cover 27 and the annular recess 25b serves as a second movable portion that absorbs vibrations caused by the pitch motion of the engine 1.

A substantially annular rubber cap 28 is fitted around the inner side of each lower holding piece 18 at both left and right ends of the shaft 26, and a portion of the rubber cap 28 enters into the tapered portion 5a of the bearing member 24. . These rubber caps 28 are attached to the rod 1
When the mounting member 15 swings relative to 6, the bearing member 24
This is to prevent dirt, stones, etc. from getting inside.

Next, the operation and effect of this embodiment configured as described above will be explained.

Since the engine mount 9 of this embodiment is equipped with the rod 16, even though the body side mount 8 is provided at a position spaced upward from the torque roll axis A, the power unit 3 is rotated by the rod 16. This means that it is substantially supported on axis A. Therefore, the power unit 3 only rotates and vibrates around the torque roll axis A, and does not generate rotational vibrations or translational vibrations around the axis in other directions.

Further, in the first movable portion C, the mounting member 15 is rotatable relative to the bearing member 24. Therefore, even if the power unit 3 makes a roll movement in the direction of the arrow E, the movement is absorbed by the sliding movement of the first movable part C. As a result, the roll motion is not transmitted to the cover 27, shaft 26, rubber cap 28, rod 16, and body-side mount 8, and these members maintain a predetermined posture.

Furthermore, the shaft 26 is swingable relative to the bearing member 24 in the second movable portion. This is ■ Bearing member 24 and shaft 26
This is because the upper cover 27 is in contact with the curved surface, and (2) gaps are created between the tapered portions 25a at both ends of the insertion hole 25 of the bearing member 24 and the outer peripheral surfaces at both ends of the shaft 26. Therefore, even if the engine 1 makes a pitch movement in the direction of arrow F, the movement is absorbed by the sliding movement of the second movable part.

As a result, the pitch motion is not transmitted to the shaft 26, the rod 16, and the body-side mount 8, and these members maintain a predetermined posture.

In this way, according to this embodiment, even if the engine l causes roll motion or pitch motion, the vibrations caused by both motions are suppressed in the first place.
And by absorbing it in the second movable parts C and D, it is possible to prevent it from being transmitted to the body side mount 8. Therefore, idle vibration can be effectively reduced.

Further, as described above, since vibrations due to roll motion and pitch motion are absorbed, no force is applied to the body side mount 8 in the translational direction or in a direction that would pry the mount rubber I3. Therefore, the durability of the body-side mount 8 is greatly improved.

[Second Embodiment] Next, a second embodiment of the present invention will be described with reference to FIGS. 5 and 6.

In the second embodiment, a shaft 37, a cover 38, and a support shaft 39 are provided as movable members at the connecting portion between the mounting member 31 and the lower part of the rod 16.
This embodiment differs from the first embodiment in that the following points are provided.

That is, the mounting member 31 is formed into a channel shape by a pair of left and right support pieces 32 and a connecting portion 33 that connects the lower ends of both support pieces 32 . A bolt insertion hole 32a is provided at the front and rear of each support piece 32-.

Bolts 34 inserted into each bolt insertion hole 32a
The mounting member 31 is fixed to the transaxle 2 by.

Further, a bearing portion 35 is integrally formed at the lower end of the rod 16. Inside the bearing portion 35, there is a pair of left and right tapered portions 36a.
An insertion hole 36 is formed with a curved annular recess 36b. A shaft 37 is inserted into the insertion hole 36. The annular protrusion 37a of the shaft 37 is covered with a cover 38 made of synthetic resin, and the cover 38 is in contact with the annular recess 36b of the bearing portion 35. This contact portion corresponds to the second movable portion in the first embodiment.

A support shaft 39 is rotatably fitted into the shaft 37. Both left and right ends of the support shaft 39 protrude from the shaft 37, and are inserted and fixed into the through hole 32b of the mounting member 31. The contact portion between the inner circumferential surface of the shaft 37 and the outer circumferential surface of the support shaft 39 corresponds to the first movable portion C in the first embodiment.

Therefore, according to this embodiment, the first and second movable parts C, D
Vibrations caused by roll motion or twitch motion can be absorbed by this method, and the same operation and effect as in the first embodiment can be achieved.

It should be noted that the present invention is not limited to the configuration of the embodiments described above, and may be modified as desired without departing from the spirit of the invention, for example, as described below.

(1) The parts used for the engine mount 9 and various mounts may be changed. Figures 7 and 8 show the front lower part and rear lower part of the transaxle 2 being connected to the front mount 4 and the rear mount 5.
An example is shown in which the right side of the engine 1 is supported on the vehicle body 6 by an engine mount 9. 9 and 10 show an example in which the left side of the transaxle 2 is supported on the vehicle body 6 by the engine mount 9, and the lower front and rear portions of the engine 1 are supported on the vehicle body 6 by the front mount 4 and the rear mount 5. It shows.

(2) In the 1.2 embodiment, the mounting member 15.31 was provided on the torque roll axis A of the power unit 3, but the
As shown in FIG. 1.12, the mounting member 41 may be provided at a position spaced apart from the torque roll axis A. In this case, the left side of the transaxle 2, through which the torque roll axis A passes, is supported on the vehicle body 6 by a torque rod 40. In other words, the mounting member 4
Even if the rod 16 is separated from the torque roll axis A, the rod 16
A point J where the axis G of the torque rod 40 and the axis H of the torque rod 40 intersect
is located on the torque roll axis A, substantially the mounting member 4
1 is located on the torque roll axis A. Even in this case, the same operation and effect as in the embodiment described above can be achieved.

[Effects of the Invention] As detailed above, according to the present invention, the mounting member on the torque roll shaft of the power unit and the body side mount spaced apart from the torque roll shaft are connected by a rod, and the rod and the power unit are connected. Since a movable member is provided at the connection part of the body side mount, it is possible to support the power unit substantially on the torque roll axis regardless of the installation position of the body side mount. It is possible to effectively reduce idling vibration by preventing it from being transmitted to the vehicle body, and furthermore, it prevents the force in the translational direction and the force in the prying direction due to both of the above-mentioned movements from being applied to the body side mount. This has the excellent effect of improving the durability of the body-side mount.

[Brief explanation of drawings]

Figures 1 to 4 show a first embodiment embodying the present invention, Figure 1 is a partially cutaway pressure surface view showing the state in which the power unit is supported by the engine mount, and Figure 2 is an exploded perspective view of the rod and mounting member. 3 is a front view schematically showing the support structure of the power unit, FIG. 4 is a plan view, FIGS. 5 and 6 show a second embodiment of the present invention, and FIG. FIG. 6 is a partially broken pressure surface view showing the supported state, and FIG. 6 is a partially exploded perspective view of the rod and the mounting member. Figures 7 and 8 show different mounting positions of the engine mount with respect to the power unit. Figure 7 is a front view, Figure 8 is a plan view, and Figures 9 and 10 are different mounting positions of the front and rear mounts with respect to the power unit. An example is shown, FIG. 9 is a front view, and FIG. 1O is a plan view. Figures 11 and 12 show another example in which the power unit is supported using a torque rod, Figure 11 is a front view, Figure 12 is a plan view, and Figure 13 is a front view showing a conventional power unit support structure. It is. l...Engine, 3...Power unit, 8...
Hotie side mount, 15, 31. 41...Mounting member,
16... Rod, 24... Bearing member forming part of the movable member, 26.37... Shaft forming part of the movable member, 27.38... Forming part of the movable member cover, 39... spindle forming part of the movable member, A...
・Torque roll axis. Patent Applicant Toyota Motor Corporation Representative Patent Attorney Hironobu Onda (and 1 other person) Drawing 1 Drawing 3 Figure 9 Figure 10 One height - ≧ ≧ Figure 13

Claims (1)

[Claims] 1. A mounting member that is substantially mounted on the torque roll axis of a power unit including an engine, and the mounting member;
a rod connecting the body-side mount installed at a position spaced apart from the torque roll axis, and a movable rod that can move relative to the roll motion and pitch motion of the engine at the connection portion between the rod and the mounting member. An engine mount characterized by the provision of a member.