JPH0717647Y2 - Transmission cover mounting structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a structure for mounting a transmission cover provided on a floor of a vehicle.

[Prior Art] In a vehicle, particularly a one-box vehicle such as a van type vehicle, a transmission cover is provided above the transmission on the floor, and by removing the cover, a service hole for inspection and repair of the engine and transmission is provided on the floor. Is formed.

FIG. 4 shows a conventional structure for mounting the above-mentioned transmission cover. An opening serving as a service hole is formed in a stepped portion of the floor panel 1 from the driver's seat to the middle seat. A transmission cover 2 having an L-shaped cross section is provided. The outer peripheral edge of the cover 2 is superposed on the floor panel 1 around the opening, and is detachably fixed with a bolt or the like.

On the other hand, below the transmission cover 2, an engine body 3 and a transmission case 4 are arranged. The rear end of the case 4 is fixed to the floor cross members 5A and 5B by an engine rear mount bracket 6.

By the way, the engine vibration is transmitted to the floor panel 1 through the transmission case 4, the engine rear mount bracket 6 and the cross member 5.

However, at the mounting end of the floor panel 1 to the rear end of the transmission cover 2, the end is offset from the cross member support by the distance l and has a cantilever structure. It is easy to vibrate in the direction,
This vibration is transmitted to the transmission cover 2.
Since the transmission cover 2 is a place where the middle-seat occupant's feet are caught, the ride comfort of the occupant may be deteriorated.

Therefore, in order to suppress the vibration of the transmission cover 2, a measure such as stacking a damping material such as asphalt around the overlapping portion between the cover 2 and the floor panel 1 is taken. In addition to requiring man-hours for mounting and increasing the weight, there are problems such as bad fitting of the floor mat.

[Problems to be solved by the present invention] In view of the above circumstances, the present invention aims to provide a cover mounting structure capable of reducing the vibration of a transmission cover without separately providing a vibration damping member. It was made.

[Means for Solving the Problems] The present invention utilizes an engine rear mound bracket that is fixed to a floor cross member near an overlapping portion between an edge of a transmission cover and an edge of a floor panel, and one end of the bracket is used as described above. It is characterized in that it extends in the direction of the overlapping portion and is fixed to the overlapping portion, and the fixing portion has a box cross-section structure.

[Operation] The rigidity of the overlapping portion is enhanced by forming the box cross-section structure including the floor cross member, which is the aggregate of the vehicle body, in the overlapping portion, and the vibration of the transmission cover is greatly reduced as compared with the conventional structure.

[Embodiment] FIGS. 1 and 2 show an embodiment of the present invention.

The front part of the floor panel 1 which is located above the engine body 3 and which provides the driver's seat is higher than other parts,
A step having an L-shaped cross section is formed between the step and another part.
A rectangular opening serving as a serpin hole is formed in this step portion, and the opening is closed by the transmission cover 2. An edge of the opening and an outer edge of a transmission cover (hereinafter, simply referred to as a cover) 2 are overlapped with each other and are detachably fixed at a plurality of positions with bolts.

The floor panel 1 has a plurality of floor cross members (hereinafter, simply referred to as cross members) at predetermined intervals in the front-rear direction.
Is supported by. Of these floor cross members, the cross member 5A is fixed to the floor panel 1 at a position along the edge of the floor panel 1 which overlaps with the rear edge of the cover 2, and the cross member 5B is at the rear position of the cross member 5A. Has been and is in support of this.

On the other hand, a transmission case 4 is provided integrally with the rear end of the engine body 3, and the rear end of the case 4 is connected to the cross members 5A, 5B via an engine rear mount bracket (hereinafter, simply referred to as a bracket) 6. Is supported by.

The bracket 6 is a bracket body which is fixed to the upper rear end of the transmission case 4 and has a U-shaped cross section and opens downward.
61, and connecting members 62A, 6 fixed to the front and rear ends of the upper surface thereof and bolted to the cross members 5A, 5B.
It consists of 2B. The connecting members 62A and 62B are cross members 5A and 5B.
Although the member 62A has a substantially U-shaped cross section, the front wall of the member 62A extends obliquely forward and upward, that is, toward the overlapping portion 20 of the rear edge of the cover 2 and the opening edge of the floor panel 1. The extended portion 621 has a leading edge as a flange corresponding to the overlapping portion 20. Then, the leading edge of the extending portion 621 is further overlapped with the overlapping portion 20 and bolted and fixed. As a result, the overlapping portion in which the connecting member extending portion 621 of the bracket 6 is further overlapped with the overlapping portion 20 between the rear end edge of the cover 2 and the floor panel 1 is the floor panel 1 and the cross member 5A.
The bracket 6 and the bracket 6 form a joint structure 7 having a closed cross section, that is, a box cross section.

Therefore, the rigidity of the overlapping portion 20 is significantly improved as compared with the overlapping portion having the above-described conventional structure, and thus the vibration transmitted to the cover 2 via the overlapping portion 20 is reduced. FIG. 3 shows a comparison between the vibration level A of the overlapping portion between the cover 2 and the floor panel 1 in the above-mentioned conventional structure and the vibration level B of the overlapping portion in the present invention. The vibration of the cover 2 in the normal running operation of the vehicle. Is significantly reduced, and as a result, the riding comfort of the occupant is greatly improved. In the present invention, this improvement in riding comfort is achieved only by changing the shape of the conventional bracket without attaching another damping material.

[Brief description of drawings]

1 and 2 show an embodiment of the present invention. FIG. 1 is a sectional view of a transmission cover mounting portion, and FIG.
Fig. 3 is an enlarged perspective view of the engine rear mount bracket, Fig. 3 is a diagram showing a comparison of vibration levels between the transmission cover mounting structure of the present invention and the conventional mounting structure, and Fig. 4 is a cross section of the conventional transmission cover mounting part. It is a figure. 1 …… Floor panel 2 …… Transmission cover 20 …… Overlapping section 3 …… Engine body 4 …… Transmission case 5A, 5B …… Floor cross member 6 …… Engine rear mount bracket 621 …… Extended section 7 …… Box Cross-section structure

Claims (1)

[Scope of utility model registration request] 1. In a structure in which an edge of a transmission cover of a one-box car is attached to an edge of a floor, one end of an engine rear mount bracket fixed to a floor cross member near the edge of the floor panel is overlapped with both edges. An attachment structure for a transmission cover, characterized in that it extends in the direction of the section and is fixed to the overlapping section, and the fixing section has a box cross-section structure.