JPH03168425A - Stopper structure of cylindrical power unit mount - Google Patents

Abstract

PURPOSE:To restrict excessive relative displacement in the direction perpendicular to an axis with a profit in view of cost by composing a stopper structure of a stopper part, which is integrally formed in inner and outer cylinders, and making a contact surface of the stopper structure to serve as a contact surface parallel to the axial direction. CONSTITUTION:A power unit side member 1 has an inner cylinder 10 and an inner cylinder side bracket 11. A car body side member 2 has an outer cylinder 20 and an outer cylinder side bracket 21. A rubber elastic unit 3 is adhesively attached by vulcanization between the inner and outer cylinders 10, 20. A stopper structure is composed of an inner cylinder side stopper part 110 integrally formed being extended in the axial direction along the lower edge of the inner cylinder side bracket 11, outer cylinder side stopper part 210 integrally formed being extended in the axial direction along the lower edge of the outer cylinder side bracket 21 and a stopper rubber 4. Thus by bringing a contact surface, between the inner and outer cylinder side stopper parts, into contact, excessive displacement is restricted.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a stopper structure for a cylindrical power unit mount used to support a power unit mounted on a vehicle on a vehicle body.

(Prior Art) Conventionally, as a stopper structure for a cylindrical power unit mount, the one described in, for example, Japanese Patent Laid-Open No. 62-35126 is known.

In this conventional source, in a cylindrical power unit mount that is equipped with an inner and outer cylinder and a rubber elastic body and utilizes shear deformation of the rubber elastic body as vibration isolation, the outer cylinder has a stopper part formed integrally with the inner cylinder, and the inner cylinder has a stopper part. The plate is fixed with bolts, and a stop flange structure is formed on the axially orthogonal abutting surface to restrict displacement when the axial displacement of the abutting surface between the stopper portion and the stop flange plate exceeds a predetermined amount. It is shown.

(Problem to be Solved by the Invention) However, in the conventional stopper structure of the cylindrical power unit mount described above, one of the parts constituting the stop bridge structure is a stopper plate that is a separate part from the inner cylinder. Therefore, the number of parts increases.

In addition, since there is no stop structure for relative displacement in the direction orthogonal to the axis, if the rubber elastic body is used in a way that causes displacement in the compression/tensile direction, and excessive displacement in this direction is required, a separate part is required. A stopper structure must be added, further increasing the number of parts.

When the number of parts is large in this way, the time and effort required to manufacture separate parts and the time required to assemble the parts increases, resulting in a disadvantage in terms of cost.

The present invention has been made in view of the above-mentioned conventional problems, and provides a stopper bridge structure for a cylindrical power unit mount, which is extremely advantageous in terms of cost while restricting excessive relative displacement in the direction orthogonal to the axis. is the issue.

(Means for Solving the Problems) In order to solve the above problems, in the stopper structure of the cylindrical power unit mount of the present invention, the stopper structure is integrated into the cylinder (or the cylinder side bracket) and the outer cylinder (or the outer cylinder side bracket). The contact surface of the stop tsuba jlR structure is made into an axially parallel contact surface.

That is, in a cylindrical power unit mount that includes an inner cylinder and an outer cylinder arranged substantially coaxially, and a rubber elastic body loaded between the inner cylinder and the outer cylinder, the cylinder connected to the inner cylinder or the cylinder An inner cylinder side stopper part is integrally formed on the side bracket, and an outer cylinder side stopper part is integrally formed on the outer cylinder or an outer cylinder side bracket connected to the outer cylinder, and the abutting surfaces of both the stopper parts are perpendicular to the axis. It is characterized by having an axially parallel abutting surface to restrict the displacement when the displacement in the direction exceeds a predetermined amount.

(Function) When assembling a cylindrical power unit mount, for example, simply fix the outer cylinder side bracket to the vehicle body and fix the cylindrical side bracket to the power unit. A stopper structure is constituted by a cylindrical stopper portion and an outer cylinder stopper portion integrally formed with the outer cylinder or an outer cylinder bracket connected to the outer cylinder.

When vibration is input to the cylindrical power unit mount from the vehicle body or power unit, the inner cylinder and outer cylinder are displaced relative to each other in the direction perpendicular to the axis, and the resulting deformation of the rubber elastic body absorbs the vibration and provides a vibration-proofing effect. It turns out.

When the relative displacement between the cylinder and the outer cylinder in the axis orthogonal direction becomes excessive due to large vibration input, etc., the contact surfaces of the cylinder-side stop collar and the outer cylinder-side stop collar come into contact due to the relative displacement exceeding the stopper clearance. This prevents excessive displacement.

(Example> Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

First, FIGS. 1 and 2 are a side view and a sectional view of a cylindrical power unit mount according to a first embodiment.

This cylindrical power unit mount has an inner @TO as a power unit side member 1, a cylindrical side bracket 11 fixed to the power unit (not shown), and bolts and nuts 12 for fastening both 10 and 11. 2, an outer cylinder 20 disposed substantially coaxially with the inner cylinder 10;
It has an outer bracket 21 fixed to the vehicle body, a rubber elastic body 3 is vulcanized and bonded between the inner cylinder 10 and the outer cylinder 20, and the outer cylinder 20 is press-fitted into the outer cylinder side bracket 21. The rubber elastic body 3 is given precompression.

The stopper structure of this cylindrical power unit mount includes an inner cylinder stopper part 110 integrally formed with the lower edge of the inner cylinder bracket 11 extending in the axial direction, and a lower edge of the outer cylinder bracket 21. It is composed of an outer cylinder side stopper part 210 which is integrally formed and extends in the axial direction, and a stopper rubber 4 provided on the inner cylinder side stopper part 110.

Further, the stopper clearance t is the stopper clearance t.
4 and the contact surface 21 of the outer cylinder side stop collar part 2TO.
1, both abutment surfaces 47111 are axially parallel abutment surfaces, and are configured to restrict relative displacement of the inner and outer cylinders 1020 in the axis orthogonal direction when the displacement exceeds the stopper clearance t.

Next, the action will be explained.

When assembling the cylindrical power unit mount, simply fix the outer cylinder (Bq bracket 21 to the vehicle body, and fix the cylindrical bracket 11 to the power unit).
0, an inner stop flange portion 110 integrally formed with the cylindrical side flaket 11, and a stop flange rubber 4 provided on the cylindrical stop flange portion 110 side, forming a stopper structure.

When vibration is input to the cylindrical power unit mount from the vehicle body or power unit, the inner cylinder] O and the outer cylinder 20
and are relatively displaced in the vertical direction in the drawing in the direction orthogonal to the axis, and the accompanying deformation of the rubber elastic body 3 absorbs vibrations and obtains a vibration-proofing effect.

When the amount of relative displacement between the inner cylinder 10 and the outer cylinder 20 in the axis orthogonal direction exceeds the stop collar clearance t due to a large vibration input, etc., the cylinder side bracket 11 and the outer cylinder side bracket 2
Both stopper portions 110 and 210 formed on 1 and 2 are close to each other, and the contact surface 41 of the stopper rubber 4 and the outer cylinder side bracket 2 are close to each other.
The contact surface 211 of the stopper rubber 4 comes into contact with the contact surface 211 of the stopper rubber 4, and relative displacement exceeding the stopper clearance t is restricted while causing elastic deformation of the stopper rubber 4.

Incidentally, the impact during this displacement regulation is alleviated by the stopper rubber 4.

As explained above, in this embodiment, the stop flange structure is constituted by the stop flange parts 110 and 210 integrally formed with the cylindrical bracket 11 and the outer cylindrical bracket 21,
Since the abutting surfaces 41, 211 of the stopper parts 110, 270 are axially parallel abutting surfaces, the number of parts does not increase when providing the stopper structure, which is extremely advantageous in terms of cost, and it is Excessive relative displacement can be regulated in an orderly manner.

Next, FIGS. 3 and 4 are a side view and a sectional view of a cylindrical power unit mount according to a second embodiment.

The cylindrical power unit mount of the second embodiment differs from the first embodiment in that the stop collar rubber 5 is provided on an outer cylinder side stop flange part 210 that is integrally formed with an outer cylinder side bracket 21.

In addition, the stop flange clearance t is the inner cylinder side stopper part 11.
0 and the contact surface 51 of the stopper rubber 5.

Note that other configurations and effects are the same as those of the first embodiment, so corresponding configurations are designated by the same reference numerals and description thereof will be omitted.

Next, FIGS. 5 and 6 are a sectional view and a side view of a cylindrical power unit mount according to a third embodiment.

The cylindrical power unit mount of this third embodiment is formed as a fluid-filled mount in which fluid is sealed inside the rubber elastic body 3, and 32 is a liquid chamber and 33 is a diaphragm.

The stopper structure includes an inner cylinder side stopper part 100 formed by extending one end of the cylinder 10, and an outer cylinder side stopper part 212 formed by a vertical wall whose upper edge is horizontal on the outer cylinder side bracket 21. The inner cylinder side stopper part 100 is constituted by a stopper rubber part 300 extending integrally from the rubber elastic body 3, and the stopper clearance t is the contact between the contact surface 213 of the outer cylinder side stopper part 212 and the stopper rubber part 300. It is set by plane 301.

In this third embodiment, a cylindrical side stopper part 10 is attached to the cylinder 10 instead of the cylindrical bracket 11 as in the first and second embodiments.
0, the size of the stopper clearance t can be controlled in the subassembly state as shown in FIGS. 5 and 6, and the dimensional accuracy of the stopper clearance t can be improved.

In addition, since the strut spring rubber part 300 is integrally extended to the rubber elastic body 3, it is the first in terms of the number of parts and manufacturing man-hours. This can be further reduced than in the second embodiment.

Note that other configurations and effects are the same as those of the first embodiment, so corresponding configurations are designated by the same reference numerals and description thereof will be omitted.

7 and 8 are a sectional view and a side view of a cylindrical power unit mount according to a fourth embodiment.

It shows.

The cylindrical power unit mount of the fourth embodiment is different from the outer cylinder 2 of the cylindrical power unit mount of the third embodiment.
If 0 is considered fixed, excessive displacement is restricted only when the inner cylinder 10 is displaced downward in the drawing, but excessive displacement in either the vertical direction in the drawing is regulated. This is an example.

That is, the stopper structure includes a cylinder side stopper part 100 formed by extending one end of the cylinder 10, and an outer cylinder side bracket 2.
1, an outer cylinder side stopper part 212 formed by a vertical wall part whose upper edge is horizontal, an outer cylinder side stopper part 214 formed by a vertical wall part whose lower edge is horizontal on the outer cylinder side bracket 21, and the inner cylinder side stopper. The stopper rubber part 300 is integrally extended from the rubber elastic body 3 to the inner cylinder side stop collar part 100, and the stopper rubber part 302 is integrally extended from the rubber elastic body 3 to the inner cylinder side stop collar part 100.
+, i2 are set by the contact surface 213 of the outer cylinder side stop collar part 212 and the contact surface 3071 of the stop collar part 300, and the contact surface 215 of the outer cylinder side stop collar part 214 and the contact surface 3071 of the stop collar part 300. It is set by the contact surface 303.

Note that other configurations and effects are the same as those of the first embodiment, so corresponding configurations are designated by the same reference numerals and description thereof will be omitted.

Although the embodiments of the present invention have been described above in detail with reference to the drawings, the specific configuration is not limited to these embodiments, and even if there are design changes within the scope of the gist of the present invention, they are included in the present invention. It will be done.

(Effects of the Invention) As explained above, in the stopper structure of a cylindrical power unit mount, the stopper structure is formed between the cylinder (or cylinder side bracket) and the outer cylinder (or outer cylinder side bracket). Since it is composed of an integrally formed stop tsuba part and the contact surface of the stop tsuba bridge structure is an axially parallel contact surface, it is extremely advantageous in terms of cost while also being able to restrict excessive relative displacement in the direction perpendicular to the axis. This effect can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a side view showing a cylindrical power unit mount according to the first embodiment of the present invention, FIG. 2 is a sectional view of the cylindrical power unit mount, and FIG. 3 is a side view of the cylindrical power unit mount according to the second embodiment. Fig. 4 is a sectional view of the cylindrical power unit mount, Fig. 5 is a sectional view of the cylindrical power unit mount of the third embodiment, Fig. 6 is a side view of the cylindrical power unit mount, and Fig. 7 is a sectional view of the cylindrical power unit mount of the fourth embodiment. A sectional view of the cylindrical power unit mount, and FIG. 8 is a side view of the cylindrical power unit mount. 10...Cylinder 11...Inner cylinder side bracket 110...Cylinder side stop collar part 20...Outer cylinder 21...Outer cylinder side bracket 210...Outer cylinder side stop collar part 3...Rubber elasticity Body 4...Stopper rubber 41,211...Contact surface t-...Stopper clearance

Claims (1)

[Claims] 1) A cylindrical power unit mount including an inner cylinder and an outer cylinder arranged substantially coaxially, and a rubber elastic body loaded between the inner cylinder and the outer cylinder, wherein the inner cylinder or An inner cylinder side stopper part is integrally formed on the inner cylinder side bracket connected to the inner cylinder, and an outer cylinder side stopper part is integrally formed on the outer cylinder or the outer cylinder side bracket connected to the outer cylinder, and both the stopper parts A stopper structure for a cylindrical power unit mount, characterized in that the abutting surface is an axially parallel abutting surface to restrict displacement when the displacement in the axis orthogonal direction exceeds a predetermined amount.