JPS6021572Y2 - Power unit displacement regulating device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a displacement regulating device disposed between a power unit and a vehicle body to regulate displacement of the power unit.

Generally, in a vehicle equipped with an internal combustion engine, a power unit 1 including an engine body 1a is mounted on an engine mount 2, as shown in FIG. A displacement regulating device 6 such as a rod 4 and a stopper 5 is arranged to regulate the displacement that occurs when the power unit 1 is operated.

Particularly, such a displacement regulating device 6 tends to be used more often in a horizontally installed power unit 1 because roll displacement appears large and becomes a problem.

By the way, to explain the conventional displacement regulating device 6 by taking as an example the buffer rod 4 shown in FIGS. A buffer member 8 made of the following is provided, and both the inner tube 7 and the buffer member 8 are integrated by heat adhesion or the like, and an outer tube 9 is fitted on the outside of the buffer member 8.

Further, the body portion 8a of the buffer member 8 is formed to have a smaller diameter than the inner diameter of the outer cylinder 9 to provide a gap S, and the outer cylinder 9 is formed approximately at the center of the body portion 8a in the axial direction over the entire circumference. A circumferential protrusion 8b having a slightly larger diameter than the inner diameter of the circumferential protrusion 8b is formed.
The peripheral edge of the buffer member 8 is press-fitted into the outer cylinder 9, and the outer cylinder 9 and the buffer member 8 are
This is for radial positioning.

Reference numerals 8c and 8c are flanges formed at both ends of the buffer member 8 and having a diameter larger than the inner diameter of the outer cylinder 9.
, axial positioning between the buffer members 8 and buffering with the mounting bracket 10 are performed.

The inner cylinder 7 is attached to the bracket 10 protruding from the power unit 1 as shown in FIG.
A mounting portion 12 formed at the end of the rod 11 is attached to a bracket 13 protruding from the vehicle body 3 side, so that large displacements of the power unit 1 in the roll direction can be prevented by the buffer member 8.
The body part 8a and the outer cylinder 9 interfere with each other to regulate the rotation.

By the way, in the power unit 1, not only large displacements that require such displacement regulation but also slight vibrations such as high frequency vibrations are constantly generated.

However, in the conventional buffer rod 4 described above, a part of the circumferential protrusion 8b of the buffer member 8 acts on the outer cylinder 9 to transmit the force at the time of displacement of the power unit 1 to the vehicle body 3 side via the rod 11. Since they are in contact with each other in the direction, the slight vibration causes compressive deformation of the circumferential projection 8b and is transmitted to the outer cylinder 9 side, that is, to the vehicle body 3 side.

Therefore, the high-frequency vibrations generated at this time occur as "muffled noise" in the vehicle interior, significantly impairing the quietness of the vehicle interior.

Further, as mentioned above, since the circumferential protrusion 8b is in pressure contact with the outer cylinder 9, a large frictional force or torsional force acts on the circumferential protrusion 8b when the outer cylinder 9 and the buffer member 8 rotate relative to each other. The roll rigidity of the buffer rod 4 increases, which worsens vibrations during idling.

Furthermore, when the displacement of the power unit 1 is large, the deformation of the circumferential protrusion 8b (particularly the torsional deformation between the inner and outer cylinders 7 and 9 is also large, and repeating this large deformation deteriorates the durability of the outer cylinder 9. There was a problem in that the wear and adhesion of the tip of the circumferential protrusion 8b that comes into contact with the ring further increases.

In view of such conventional problems, the present invention forms a protrusion on the outside of the shock absorbing member at a portion other than the line of operating force when the power unit is displaced, and locks this protrusion on the outer cylinder side to prevent slight vibrations of the power unit. The present invention provides a displacement regulating device that allows the protrusion to absorb the vibration as an input in the shearing direction, thereby reducing minute vibrations transmitted to the vehicle body.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings, in which the same parts as those in the conventional structure are denoted by the same reference numerals.

FIG. 3 is an exploded perspective view of the buffer rod 4' of this embodiment;
FIG. 4A shows a front view of such a buffer rod 4', and FIG. 4B shows a sectional view of a main part of FIG. 4A, and the following description will be made based on these figures.

In the figure, 9' is the outer cylinder which is the second member, 11' is the rod, and 1
Reference numeral 2' denotes a mounting portion to the vehicle body, and these are formed by respective structural members 4'a and 4'b extending longitudinally in the axial direction of the rod 11'.

These structural members 4'a and 4'b are plate materials, and the outer cylinder 9',
The rod 11' and the attachment part 12' are integrally formed by press molding, and then the respective constituent members 4'a and 4'b are fixed by spot welding P or the like.

4'C94'C is a reinforcing flange formed by bending both sides of the component 4'a=4'b outward.

Reference numeral 8' denotes a buffer member fitted into the outer cylinder 9', and this buffer member 8' is made of an elastic material such as rubber as in the conventional case.
The diameter 'a' is made smaller than the inner diameter of the outer cylinder 9' to provide a gap S, and flanges 8c, 8c are provided at both ends of the body part 8'a.

Reference numeral 7 denotes an inner cylinder that is a first member that is attached to a mounting hole 10a of a bracket 10 formed in a power unit (not shown) via a bolt (not shown), and the inner cylinder 7 is arranged on the central axis of the buffer member 8'. Then, both of them are fixed by heat adhesion or the like.

Reference numeral 14 denotes an auxiliary buffer member fitted to the mounting portion 12' of the buffer rod 4', and a bracket 13 in which a circular tube 14a provided at the central axis of the auxiliary buffer member 14 is shaped on the vehicle body side (not shown).
It is attached with bolts, etc. not shown.

Here, the present invention provides a direction in which the rod 11' extends between the inner sides of the flange portions 8c and 8c of the buffer member 8', centering on the inner cylinder 7.
In other words, a pair of first protrusions 20, 20 are formed integrally with the buffer member 8' at positions substantially perpendicular to the line of force acting on the displacement of the power unit.

These first protrusions 20.20 are shaped like a bridge spanning between both ends of the body 8'a, and are shaped so that the central part 20a of the first protrusions 20.20 and the body 8'a are separated. It's intimidating.

On the other hand, groove-shaped recesses 21, 21 are formed in the axial direction on the inside of the outer cylinder 9' at positions corresponding to the first protrusions 20, 20,
The center portions 20a of the first protrusions 20.20 are press-fitted and locked into the recesses 21, 21, respectively, to position the outer cylinder 9' and the buffer member 8' in the radial direction.

Incidentally, since the outer cylinder 9' of this embodiment is formed by press-molding a plate material as described above, the recesses 21 and 21 can be easily formed by simply changing the press mold.

With the above configuration, the buffer rod 4' of the present invention is able to handle the body part 8' of the buffer member 8' when the power unit is subjected to a large displacement.
The buffer rod 4 interferes with the outer cylinder 9' to regulate displacement as in the conventional case, but when the power unit is slightly vibrating so that the outer cylinder 9' and the body part 8'a do not interfere, the buffer rod 4
'The vibration force applied in the direction of the acting force of the first protrusion 20.2
It acts on both ends 20b, 20b of 0 as an input in the shear direction.

Therefore, when the first protrusion 20.20 is inputted in the shear direction, the vibration transmitted from the buffer member 8' to the outer cylinder 9' is significantly reduced, unlike when the input is applied in the compression direction.

FIG. 5 shows another embodiment, in which the first protrusions 20', 20'
has a substantially T-shape connected to the body 8'a of the buffer member 8', and its tip 8'b is press-fitted into the recesses 21, 21 of the outer cylinder 9'.

In this embodiment, slight vibrations of the buffer rod 4' in the direction of the applied force are inputted to the base 20'a as a force in the shearing direction.

Incidentally, even in this case, the first projections 20', 2
It goes without saying that 0' is arranged in a direction perpendicular to the line of action with the inner cylinder 7 as the center.

FIG. 6 shows another embodiment, in which in each of the embodiments described above, the first protrusion 20, 20' is formed from the buffer member 8';
Although a recess 21 is shown in the outer cylinder 9', in this embodiment, a second protrusion 22 is formed inside the outer cylinder 9', and a second protrusion 22 is formed on the outside of the body 8'a of the buffer member 8'. is a first protrusion 20'' facing both sides of the second protrusion 22 in the direction of the line of action;
20'' to form a recessed portion 20'', and this first
The second recess 2G'' between the protrusions 20'' and 20''
The protrusion 22 is locked therein.

In this case, a shearing force acts on one of the first protrusions 20'', 20'' that interfered with the second protrusion 22.

Incidentally, the relationship between the inner cylinder 7 and the outer cylinders 9, 9' in each of the above-mentioned embodiments may be reversed, and the buffer members 8, 8' may be fixed to the outer cylinders 9, 9'. Needless to say, there is no need to limit it to cylinders.

Further, in each of the above-described embodiments, the first protrusion 20° 20',
20'' is shown centered around the inner cylinder 7 and disposed in a direction perpendicular to the line of action of the buffer rod 4', but the first protrusion 20°20', 20'' is not limited to this. Even if it is disposed at a location other than on the line of action, the component force of the vibration in the direction of the line of action can be absorbed as a shearing force.

However, as the first projections 20, 20', 20'' approach the line of action, the component force in the compression direction increases, and the amount of vibration absorption transmitted to the vehicle body is prevented from decreasing. It is not possible.

Further, although the buffer rod 4' of this embodiment is an example in which the present invention is applied to the attachment part to the power unit side, the present invention is not limited to this. The auxiliary buffer member 14 is also provided in the portion 12', and it goes without saying that the present invention may be applied to this portion as well.

Furthermore, the present invention is not limited to the buffer rod 4', but may be applied to the stopper 5 described above.

For example, as shown in FIG. 7, the shaft 15 hanging from the lower end of the power unit 1 is attached to the inner cylinder 7', and the first protrusion 20.20 formed on the buffer member 8' is
The outer cylinder 9' may be fixed to the vehicle body 3 side by disposing it in a position other than the direction in which the power unit 1 mainly receives the roll.

As explained above, the displacement regulating device for a power unit of the present invention includes a cushioning member fixed to a first member attached to either the power unit or the vehicle body, and a buffer member that fits into the buffer member and is attached to the power unit or the vehicle body. A gap is provided between the buffer member and the second member attached to the other of the buffer members, and a protrusion is provided on one of the opposing portions of the buffer member and the second member other than on the line of force when the power unit is displaced, and a protrusion is provided on the other. Since the concave portion that can be fitted with the protrusion is provided, the first protrusion absorbs substantially all or part of the micro-vibration of the power unit as an input in the shearing direction, thereby reducing the micro-vibration transmitted to the vehicle body. can be significantly reduced.

Therefore, it is possible to reduce muffled noise in the vehicle interior due to high-frequency vibrations of the power unit, thereby improving quietness.

Moreover, there are no sliding friction points between the cushioning material and the second member, and excellent effects are achieved in that deterioration of durability due to abrasion and adhesion of the cushioning material can be prevented.

[Brief explanation of drawings]

Fig. 1 is a schematic explanatory diagram showing how the power unit is attached to the vehicle body, Fig. 2 A and B show the main parts of a conventional buffer rod, Fig. A is a front view, Fig. B is a sectional view of the main parts, Fig. 3 is an exploded perspective view of a buffer rod according to the present invention, Fig. 4A is a front view of such a buffer rod, and Fig. 4B is the same view A.
5 is a perspective view of the main part showing another embodiment of the present invention; FIG. 6 is a front view of the main part showing another embodiment of the present invention different from FIG. 5; FIG. 7 is a sectional view showing another embodiment of the present invention different from FIGS. 5 and 6. FIG. 1...Bawani unit, 3...Vehicle body,
4°・bent buffer rod, 5・◆・・・stopper,
6...Displacement regulating device, 7...First member, 8.8'...Buffer member, 9,9'...
・Second member, 20.20', 20''...first protrusion, 20'', 21...recess, 22...
...Second protrusion.

Claims (1)

[Scope of utility model registration request] It has a first member, a buffer member fixed to the first member, and a second member fitted to the buffer member, and either the first member or the second member is attached to the power unit side. In addition, in the power unit displacement regulating device, the other is attached to the vehicle body side, and the displacement of the power unit is regulated via the buffer member. 5. A gap is provided between the buffer member and the second member, and A power unit characterized in that one of opposing portions of the buffer member and the second member other than on the line of action during displacement of the power unit is provided with a protrusion, and the other is provided with a recess that can be engaged with the protrusion. Displacement regulating device.