JPS6218499Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for supporting a final reduction gear on the body of an automobile, and particularly relates to an improvement in a system in which the rear part of the final reduction gear is supported at one point.

In normal automobiles, the final reduction gear is supported under the floor panel of the vehicle body, but this support device is constructed with a vibration-proof structure so that vibrations in the final reduction gear will not be transmitted to the floor panel and cause discomfort to passengers. is normal.

For example, the conventional support device shown in FIG. 1 is a so-called one-point support system, in which a bracket 2 is integrally fixed to the lower surface of a floor panel 1 of the vehicle body.
A pin bolt 3 is suspended vertically from a and 2b, and a final reduction gear 5 is supported via an insulator 4 attached to the lower end of the pin bolt. In other words, several types of brackets 2a and 2b are attached to the cross member 6 on the lower surface of the floor panel 1, and relatively long pin bolts 3 are engaged with these brackets 2a and 2b to attach them to the lower part of the bracket. hang vertically. An insulator 4 is attached to the pin bolt 3 via a spacer 7, and the insulator 4 is fixed to the final reducer 5 with bolts 8, so that the final reducer is supported by the floor panel 1. The insulator 4 is the pin bolt 3
An elastic body 9 such as rubber attached around the lower end of the
It has an outer frame 10 attached to the outside of the elastic body 9 and bolted to the final reducer 5,
By absorbing vibrations in the final reduction gear 5 in the elastic body 9, transmission of vibrations to the vehicle body is prevented.

However, with this support device, the insulator 4
is mounted below the brackets 2a and 2b, the length of the insulator 4 in the front-rear direction (left-right direction in the figure) becomes large, and the upper and lower edges 10 of the outer frame 10
a and 10b are arranged close to this rear fuel tank 11. Therefore, in the event of a collision of a car, as shown in Fig. 5 (the support device in Fig. 1 is shown by a chain line, and the support device of the present invention is shown by a solid line), the final reduction gear support device and the spare tire house installed behind this 1A may be deformed, and the fuel tank 11 provided below the spare tire house 1A may interfere with the outer frame 10 of the support device, deforming the fuel tank 11, or in some cases. Damage occurs and fuel leaks,
There is a risk of causing a fire.

Furthermore, the conventional equipment described above uses a large number of parts such as brackets, bolts, and spacers, making it difficult to assemble and
There are also problems such as a large number of man-hours for disassembly and other work, and high costs.

Furthermore, as shown in Japanese Utility Model Application No. 52-126527, in the case where a rear member 12 is provided as a supporting member in addition to the cross member 10, the floor has to be raised, which only reduces the living space. Moreover, due to the relationship between the mounting position and the mass of the support member, it is likely to resonate with the resonant frequency of the final reduction gear, which is disadvantageous in terms of sound countermeasures.

The present invention was devised in view of the above, and its purpose is to internally support an insulator made of an elastic material within a cross member integrally welded to the vehicle body, and to provide a support bracket supported by the insulator. By supporting the rear part of the final reduction gear, the space occupied by the support device behind the final reduction gear is reduced, and the distance between the device and the fuel tank is increased to prevent damage to the fuel tank in the event of a collision. While suppressing or preventing this, the number of parts used is reduced to simplify the structure, reduce the number of assembly and disassembly work, and reduce costs.In addition, the floor is lowered to increase living space. An object of the present invention is to provide a support device for a final reduction gear that can be used.

The present invention will be explained below with reference to the embodiments shown in FIGS. 2 and 3.

FIG. 2 is a side view of the device of the present invention, and FIG. 3 is a cross-sectional view thereof taken along the line 2. In particular, the left side of FIG. 2 is the front of the automobile. In the figure, 1 is a floor panel of a vehicle body, and 20 is a cross member that is integrally fixed to the floor panel 1. This cross member 20
has an open lower side, and internally supports a reinforcing bracket 21 having a U-shaped cross section. When a cross member 20' whose lower portion is closed is used as the cross member 20, a portion 20'a of the lower side of the cross member 20' may be dropped to form an opening as shown in FIG.

The cross member 20 and the reinforcing bracket 21
The support bolt 22 is passed through in the front-rear direction of the vehicle,
Tighten with nut 23. And this bolt 2
An insulator 24 is installed around the cross member 2 and inside the cross member 20. This insulator 24
An annular elastic body 26 made of an elastic member such as rubber is attached to the circumferential surface of the collar 25 loosely attached to the support bolt 22.
is fixed by baking or the like, and a short cylindrical sleeve 27 is further fixed by baking around the outer periphery of this elastic body 26. In this case, if spaces 26a, 26a are formed in the upper and lower peripheral parts of the elastic body 26 as shown in FIG. 3, the deformation of the elastic body 26, which will be described later, will be facilitated.
Vibration absorption function can be enhanced. Further, a ring body 28 having a projecting piece 28a is fitted and fixed to the front end of the collar 25, and this projecting piece 28a is connected to a notch 2 formed at the lower edge of the reinforcing bracket 21.
The collar 25, that is, the insulator 24, is prevented from rotating freely by entering into the interior of the collar 1a.

On the other hand, a sleeve 30 welded to the upper edge of the support bracket 29 is press-fitted onto the outer periphery of the sleeve 27, so that the support bracket 29 is supported by the insulator 24. This is to prevent damage to the elastic body 26 and its seizing portions due to welding heat when the support bracket 29 is directly welded to the sleeve 30. The support bracket 2
9 is made by bending a rigid plate material into a shape that widens toward the end, and the strength is increased by a flange formed from the side edge to the lower edge. A pair of bolt insertion grooves 31, 31 cut out from the lower edge flange at a predetermined interval are formed on the left and right sides at the lower end of the support bracket 29. A pair of mounting bolts 3 planted on the rear side
Insert 2 and 32. At the tips of the bolts 32, 32, there is a special washer 3, which has a substantially L-shaped cross section and has bolt insertion grooves 33a, 33a.
3 is attached from the rear of the support bracket 29 and fastened with nuts 34, 34, respectively.

Since the support device of the present invention has the above configuration, the load of the final reducer 5 is transferred to the support bracket 29, insulator 24, support bolt 22, and cross member 20.
The final reducer 5 can be supported by the vehicle body via the insulator 2 interposed between the support bracket 29 and the cross member 20.
4, that is, it can be absorbed by the elastic body 26.

The feature of this device is that the insulator
By installing it inside the cross member 20, which originally exists as a structural member of the vehicle body, there is more space behind the final reduction gear, and the distance between the rear end of the support bracket 29 and the front of the fuel tank 11 is as shown in FIG. The distance between the outer frame 10 and the fuel tank of the conventional insulator 4 can be made much larger. Therefore, as shown by the solid line in Figure 5, even if the final reduction gear or fuel tank moves slightly due to a car collision, there is almost no interference between the two, and damage to the fuel tank can be effectively prevented. can be prevented.

In addition, in this device, when the shape and dimensions of the final reduction gear differ depending on the vehicle type, the rear end position of the final reduction gear is indicated from 5A to 5A, for example, as shown by the two-dot chain line in Fig. 2. When located at the rear, only the support bracket 29A needs to be replaced with a support bracket 29A having a shape that is compatible with the support bracket 29A, making it extremely easy to apply the support bracket to various types of automobiles.

In summary, according to the final reduction gear support device of the present invention, the insulator is installed inside the cross member,
Since this insulator has a simple structure in which the support bracket is supported, the number of parts can be reduced and assembly and disassembly can be easily performed. Since it is possible to maintain a sufficient distance between the fuel tank and the fuel tank, it is possible to prevent damage to the fuel tank in the event of a collision, and it also has great practical effects such as lowering the floor and increasing the living space. .

[Brief explanation of the drawing]

FIG. 1 is a side view of a conventional support device, FIG. 2 is a side view of the support device of the present invention, and FIG. 3 is a side view of a conventional support device.
A line sectional view, FIG. 4 is a front view showing another example of the cross member, and FIG. 5 is a diagram showing the positional relationship between the support device and the fuel tank at the time of a collision. 1... Floor panel, 5... Final reduction gear, 11...
...Fuel tank, 20...Cross member, 22...
Support bolt, 24... Insulator, 26...
Elastic body, 29...Support bracket.

Claims (1)

[Scope of utility model registration request] The present invention includes a cross member welded to the vehicle body, an insulator installed in the internal space of the cross member and supported by the cross member, and a support bracket attached to the insulator to support the rear part of the final reduction gear. A special feature of the support device for the final reduction gear.