JP2001280411A - Mounting structure for dynamic damper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the mounting structure for a dynamic damper which can easily position the damper and more reinforce a mounting member. SOLUTION: A dynamic damper mounting part 19 molded by drawing is set to the both sides of an opening 18 formed in a mounting member 8b, and then expanding parts 15 formed at the both sides of the mounting part 12 of a dynamic damper 9 is overlapped to the damper mounting part 19. As the dynamic damper 9 is thus mounted to the mounting member 8, the damper mounting part 19 can position the dynamic damper 9, and more reinforce the mounting member 8.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a mounting structure of a dynamic damper for a vehicle, and more particularly to a mounting structure of a dynamic damper in which a mounting member is reinforced.

[0002]

2. Description of the Related Art A vehicle is provided with a mounting member for mounting a power plant, in which an engine and a transmission are integrally mounted, on a vehicle body. May be transmitted. Therefore, it has been conventionally performed to provide a dynamic damper in a space formed by the mounting member and the oil pan, and to suppress a target vibration so as to resonate with the dynamic damper.

As shown in FIG. 7, a vehicle has a suspension frame 51 provided so as to be orthogonal to a vehicle traveling direction (A direction in FIG. 7), one end of which is connected to the suspension frame 51 and the other end thereof. And a mounting member 52 connected to a predetermined position of the vehicle body, and a dynamic damper 53 is installed on the mounting member 52. In the conventional mounting structure of the dynamic damper 53, as shown in FIG. 8, a bolt insertion hole 54 (see FIG. 7) formed in the upper surface of the mounting member upper 52a is formed in the bottom of the dynamic damper 53. The stud bolt 55 is inserted. Then, the nut 5 is inserted into the stud bolt 55 through a nut insertion hole 57 formed in the mounting member lower 52b.
6, the dynamic damper 53 is attached to the mounting member 52 by tightening the nut 56.

[0004] However, in the conventional mounting structure of the dynamic damper 53, as shown in FIG. 8, it is necessary to make the oil pan 58 concave so as to avoid interference with the dynamic damper 53. There was a problem that it was difficult to secure the required capacity. In addition, in order to secure a mounting space for the dynamic damper 53, the height (H in FIG. 8) of the mounting member 52 at the portion where the dynamic damper 53 is to be mounted needs to be lower than that of the other portions. In addition, there is a problem that the dynamic damper 53 is enlarged to cover the insufficient rigidity of the mounting member 52.

Accordingly, as shown in FIG. 9, a mounting seat 62 formed by drawing and forming a lower mounting member 61b is provided in a space inside the mounting member 61, and an opening 63 is formed in the mounting member upper 61a. The applicant has filed a patent application for a mounting structure of a dynamic damper (Japanese Patent Application No. 11-14001).
5). In this dynamic damper mounting structure, the dynamic damper 64 is inserted through the opening 63 so that the mounting seat 6 can be mounted.
2, the dynamic damper 64 is housed in the space inside the mounting member 61, so that it is not necessary to make the shape of the oil pan 58 concave so as to avoid interference with the dynamic damper 64. Oil capacity can be secured.

However, in the mounting structure of the dynamic damper, it is not necessary to make the height of the mounting member 61 at the portion where the dynamic damper 64 is mounted lower than at the other portions. However, as shown in FIG. Since the opening 63 for inserting the dynamic damper 64 is formed, the rigidity near the opening 63 of the mounting member 61 is lower than that of other parts. When attaching the dynamic damper 64 to the mounting member 61, the stud bolt 65 extending from the dynamic damper 64 is used.
Is inserted into the through hole formed in the mounting seat 62, and the dynamic damper 64 is inserted from the opening 63. Then, a nut 66 is screwed into a stud bolt 65 protruding from the rear side of the mounting seat 62 and tightened.
The dynamic damper 64 is attached to the mounting member 61. Therefore, the operation of assembling the dynamic damper 64 is complicated and inefficient.

[0007]

SUMMARY OF THE INVENTION Accordingly, the present invention has been made in view of the above circumstances, and provides a mounting structure of a dynamic damper which can ensure the rigidity of a mounting member and can be easily assembled. With the goal.

[0008]

In order to achieve the above object, the present invention according to claim 1 of the present invention is arranged in a space inside a mounting member formed by a mounting member upper and a mounting member lower. A mounting structure of a dynamic damper for suppressing vibration generated from an engine and a transmission, wherein an opening is formed in a mounting member, and a dynamic damper mounting portion is provided on both sides of the opening. The mounting plate extending to both sides is fixed to the dynamic damper mounting portion, and the dynamic damper is mounted on the mounting member.

With this configuration, the dynamic damper mounting plate is fixed to the dynamic damper mounting portions provided on both sides of the opening, and the dynamic damper is mounted on the mounting member. Can be reinforced.

Further, the invention according to claim 2 of the present invention is characterized in that the dynamic damper mounting portion is provided in the longitudinal direction of the mounting member.

With this configuration, the mounting member can be reinforced more effectively.

According to a third aspect of the present invention, an opening is formed in the mounting member lower, and a dynamic damper attaching portion for accommodating a dynamic damper attaching plate is provided on both sides of the opening. The dynamic damper is inserted into the opening, the mounting plate is housed in the dynamic damper mounting portion, and the mounting plate is fastened to the dynamic damper mounting portion by tightening bolts, thereby fixing the dynamic damper to the mounting member. It is characterized by the following.

With this configuration, the dynamic damper can be positioned on the mounting member by housing the mounting plate of the dynamic damper in the dynamic damper mounting portions provided on both sides of the opening of the mounting member. . Further, since the threaded portion of the bolt projects into the mounting member, the amount of the dynamic damper projecting downward can be reduced, and the height of the mounting member can be suppressed.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. First, the outline of the configuration of the engine mount section in the vehicle will be described. As shown in FIG. 6, a power plant 3 in which an engine 1 and a transmission 2 are integrally assembled has a frame structure including a front frame 4, a suspension frame 5, a right frame 6, and a left frame 7, and one end thereof. The other end is fixed to the front frame 4 and supported by a mounting member 8 fixed to the suspension frame 5. As shown in FIG. 2, a dynamic damper 9 is provided substantially at the center of the mounting member 8, and an oil pan 10 is located above the dynamic damper 9 as shown in FIG. I have. The mounting member 8 has a structure in which the dynamic damper 9 resonates with vibration of a predetermined frequency generated from the power plant 3 to absorb the vibration generated from the power plant 3. Reference numeral 11 shown in FIG. 3 is an exhaust pipe.

Next, the mounting structure of the dynamic damper 9 of the present embodiment will be described in detail. First, the configuration of the dynamic damper 9 of the present embodiment will be described. As shown in FIGS. 3 to 5, the dynamic damper 9 according to the present embodiment has a mounting plate 12 having a substantially U-shaped cross section.
A mass 1 as a vibrator vibrating at a predetermined natural frequency is provided between opposing surfaces of the mounting plate 12.
3 is installed via a rubber 14. Further, as shown in FIG. 1, the mounting plate 12 includes an extension portion 15 formed by extending a side edge of the bottom surface 12 a in a longitudinal direction of the mounting member 8. As shown in FIGS. 2 and 4, a bolt insertion hole 17 for inserting a bolt 16 (see FIGS. 1 to 5) for attaching the dynamic damper 9 to the mounting member 8 is provided.

Next, the configuration of the mounting member 8 of the present embodiment will be described. As shown in FIG. 3, the mounting member 8 of the present embodiment is formed such that a separately formed mounting member upper 8a and a mounting member lower 8b are joined by welding or the like to have a space inside. . In addition, mounting member 8
As shown in FIG. 2, an opening 18 for allowing the dynamic damper 9 to face the space inside the mounting member 8 is formed at a substantially central portion of the mounting member 8. 8b is provided with a dynamic damper attachment portion 19 formed by drawing. Also, the dynamic damper mounting portion 19 is configured as shown in FIG.
As shown in FIG. 5, the dynamic damper 9 is drawn and formed in a shape substantially similar to the extension 15 of the mounting plate 12, and the dynamic damper 9 is positioned when the dynamic damper 9 is mounted on the mounting member 8.
It is structured to accommodate the thickness of the bottom surface 12a of the mounting plate 12. The dynamic damper mounting portion 19 is provided with a hole 20 formed in alignment with the bolt insertion hole 17 of the dynamic damper 9, and the weld nut 21 is coaxial with the hole 20 as shown in FIGS. It is provided in.

In the mounting structure of the dynamic damper 9 according to the present embodiment, the dynamic damper 9 is inserted into the opening 18 formed in the lower mounting member 8b, and the mounting plate 12 extends into the dynamic damper mounting portion 19. The part 15 is positioned so as to be accommodated. Then, the bolt 16 is inserted into the bolt insertion hole 17 of the extension portion 15 overlapped with the dynamic damper attachment portion 19, and the bolt 16 is screwed into the weld nut 21 and tightened, so that the mounting plate 12 Both sides are fastened to the dynamic damper mounting portion 19 to fix the dynamic damper 9 to the mounting member 8.

The operation of the structure for mounting the dynamic damper 9 of this embodiment in such a configuration will be described. When attaching the dynamic damper 9 of the present embodiment to the mounting member 8, the dynamic damper 9 is inserted through the opening 18, and the extension portions 15 formed on both sides of the mounting plate 12 of the dynamic damper 9 are provided.
Is stored in the dynamic damper attachment portions 19 provided on both sides of the opening 18 of the mounting member 8. As a result, the dynamic damper 9 is positioned on the mounting member 8, and the extension 15 overlaps the dynamic damper attachment 19. And dynamic damper 9
Bolt 1 is inserted into bolt insertion hole 17 formed in
6 and the bolt 16 is fastened to the weld nut 21 fixed to the dynamic damper mounting portion 19. As a result, the dynamic damper 9 is
The mounting plate 12 is mounted on the mounting member 8 such that the mounting plate 12 is erected.

Therefore, in the mounting structure of the dynamic damper 9 according to the present embodiment, the extension 15 formed on the mounting plate 12 of the dynamic damper 9 is overlapped with the dynamic damper mounting portion 19 formed by drawing on the mounting member 8. By doing so, the dynamic damper 9 can be positioned on the mounting member 8, so that the dynamic damper 9 can be easily assembled and work efficiency can be improved. Further, in the mounting structure of the dynamic damper 9 of the present embodiment, the dynamic damper 9 is fixed by the bolt 16, so that the bolt is provided below the mounting member 8 as in the conventional mounting structure (see FIGS. 8 and 9). The protrusion of the mounting member 8 can be reduced without being protruded, and the height of the mounting member 8 can be reduced.

In the mounting structure of the dynamic damper 9 of the present embodiment, a dynamic damper mounting portion 19 is provided on both sides of the opening 18 formed in the mounting member lower 8b, and the dynamic damper 9 is attached to the dynamic damper mounting portion 19. Since the dynamic damper 9 is attached to the mounting member 8 with both sides of the mounting plate 12 being fixed, the mounting member 8 can be reinforced by the dynamic damper 9 and the dynamic damper attachment portion 19 Since the mounting members are provided on both sides in the longitudinal direction, the mounting members 8 are provided.
Can be more effectively reinforced.

[0021]

According to the first aspect of the present invention, a dynamic damper mounting portion is provided on both sides of the opening of the mounting member, and both sides of the mounting plate of the dynamic damper are fixed to the dynamic damper mounting portion. Since the dynamic damper is attached to the mounting member, the mounting member can be reinforced by the dynamic damper.

According to the second aspect of the present invention, the dynamic damper mounting portion is provided on both sides of the opening in the longitudinal direction of the mounting member, and the dynamic damper mounting plate is fixed to the dynamic damper mounting portion. Thus, since the dynamic damper is attached to the mounting member, the mounting member can be more effectively reinforced by the dynamic damper.

According to the third aspect of the present invention, a dynamic damper is formed by merely overlapping an extension formed on a mounting plate of a dynamic damper with a dynamic damper mounting formed by drawing on a mounting member. Since the damper can be positioned on the mounting member, the dynamic damper can be easily assembled and work efficiency can be improved. Further, since the dynamic damper is fixed to the mounting member by the bolt, the stud bolt for screwing the nut does not protrude below the mounting member, so that the amount of projection of the mounting member below the protrusion is reduced. The height of the mounting member can be kept low, and the mounting member can be prevented from becoming large.

[Brief description of the drawings]

FIG. 1 is a plan view showing a mounting structure of a dynamic damper according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a mounting structure of the dynamic damper according to the embodiment of the present invention, particularly a view in which a part of a mounting member upper is cut away.

FIG. 3 is an explanatory view of a mounting structure of the dynamic damper according to the embodiment of the present invention, particularly showing an arrangement of the dynamic damper in a vehicle body.

FIG. 4 is an explanatory view of a mounting structure of the dynamic damper according to the embodiment of the present invention, and is a cross-sectional view taken along the line BB in FIG.

5 is an explanatory view of a mounting structure of the dynamic damper according to the embodiment of the present invention, and is a cross-sectional view taken along the line CC in FIG. 1;

FIG. 6 is a diagram showing a frame structure in an engine mount of a vehicle body.

FIG. 7 is a perspective view showing a conventional dynamic damper mounting structure.

FIG. 8 is an explanatory view showing a conventional mounting structure of a dynamic damper, particularly showing a mounting structure in which a dynamic damper is installed on a mounting member upper.

FIG. 9 is an explanatory view showing a conventional mounting structure of a dynamic damper, particularly showing a mounting structure in which an opening is provided in a mounting member upper.

[Description of Signs] 8 Mounting Member 8a Mounting Member Upper 8b Mounting Member Lower 9 Dynamic Damper 12 Mounting Plate 15 Extension 16 Bolt 18 Opening 19 Dynamic Damper Mounting

Claims (3)

[Claims] 1. A mounting structure for a dynamic damper, which is arranged in a space inside a mounting member formed by a mounting member upper and a mounting member lower, and suppresses vibrations generated from an engine and a transmission, wherein the mounting member is provided. While forming an opening in
A dynamic damper mounting portion is provided on both sides of the opening, and mounting plates extending on both sides of the dynamic damper are fixed to the dynamic damper mounting portion, and the dynamic damper is mounted on the mounting member. Characteristic dynamic damper mounting structure. 2. The dynamic damper mounting structure according to claim 1, wherein said dynamic damper mounting portion is provided in a longitudinal direction of said mounting member. 3. An opening is formed in the mounting member lower, and the dynamic damper mounting portion for accommodating a mounting plate of the dynamic damper is provided on both sides of the opening, and the dynamic damper is provided in the opening. At the same time, the mounting plate is accommodated in the dynamic damper mounting portion, and the mounting plate is fastened to the dynamic damper mounting portion by tightening a bolt, thereby fixing the dynamic damper to the mounting member. The mounting structure of a dynamic damper according to claim 1 or 2, wherein: