JP4477310B2 - Engine mount bracket structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an engine mount bracket structure for mounting an automobile engine to a vehicle body frame.
[0002]
[Prior art]
An automobile engine is attached to a vehicle body frame via an engine mount bracket. In the conventional engine mount bracket structure, as shown in FIG. 5, a pair of opposing brackets 101 are fixed to the left and right body frames 103, and an engine mount member 102 is attached between the two brackets 101. The bracket 101 is connected. One end of an engine (not shown) is attached to the upper part of the bracket 101 via a rubber mount or the like.
[0003]
Here, the engine mount member 102 described above is formed of a member having a vertical cross section of, for example, a U-shape and high rigidity in terms of shape and material. Such a highly rigid engine mount member is not necessarily limited to that shown in FIG. 5 and is widely used in general automobiles (see, for example, Patent Documents 1 and 2).
[0004]
On the other hand, in an automobile equipped with an air suspension on the front wheel, as shown in FIG. 5, a lateral rod 104 is provided to restrict the lateral movement of the suspension, and one end thereof is attached to a suspension (not shown) and the other end Is attached to one bracket 101 of the engine mount bracket. Therefore, when the handle is turned, the lateral movement of the suspension is regulated by the vehicle body frame 103 via the bracket 101.
[0005]
[Patent Document 1]
Utility Model Registration No. 2510785 (page 2-3, Fig. 1)
[Patent Document 2]
Utility Model Registration No. 2529146 (Page 2, Figure 1)
[0006]
[Problems to be solved by the invention]
As described above, the conventional engine mount bracket structure includes the pair of brackets 101 fixed to the left and right vehicle body frames 103 and the engine mount member 102 attached between the pair of brackets 101. Reference numeral 102 denotes a member having high rigidity.
[0007]
Therefore, a strong so-called box structure is formed by the engine mount bracket and the vehicle body frame 103 in front of the engine mount bracket. When the handle is cut, the engine mount is caused by the inertial force of the vehicle body as shown in FIG. There is a problem that a large bending stress acts on the body frame 103 behind the bracket.
[0008]
Further, in an automobile equipped with an air suspension on the front wheel, one end of the lateral rod 104 is attached to one bracket 101 of the engine mount bracket, and when the handle is turned, the lateral movement of the suspension is passed through the bracket 101. The vehicle body frame 103 regulates it. At this time, the stress due to the lateral rod 104 acts on the vehicle body frame 103 in the same direction as the inertial force of the vehicle body described above. Therefore, when the steering wheel is turned, there is a problem that both the inertial force of the vehicle body and the stress due to the lateral rod 104 act on the vehicle body frame 103 to generate a large bending stress on the vehicle body frame.
[0009]
The present invention has been made to solve such a problem, and an object of the present invention is to provide an engine mount bracket structure that can greatly reduce the bending stress of the vehicle body frame behind the engine mount bracket.
[0010]
[Means for Solving the Problems]
In order to solve the above-described problems, the engine mount bracket structure of the present invention fixes a pair of opposing brackets on which the engine is mounted on the left and right body frames, and a plate member between the pair of brackets. Since the pair of brackets are connected perpendicularly to the direction, a strong box structure by the engine mount bracket and the vehicle body frame in front of the engine mount bracket is eliminated, and a flexible structure is formed. For this reason, when the handle is turned, the plate member is deformed in the front-rear direction with respect to the inertial force of the vehicle body, and the bending stress on the vehicle body frame behind the engine mount bracket is greatly reduced.
[0011]
The air suspension lateral rod can be attached to the bracket. By adopting such a structure, even when both the inertial force of the vehicle body and the stress due to the lateral rod act on the vehicle body frame when the handle is turned, the above-mentioned action of the plate member causes the engine mount bracket in the vehicle equipped with the air suspension. The bending stress on the vehicle body frame behind the vehicle can be sufficiently reduced.
[0012]
The plate member can also be formed of spring steel. In this way, by using spring steel as the material of the plate member, sufficient deformation strength can be secured for the plate member.
[0013]
It is also possible to attach a plurality of plate members substantially parallel to each other at intervals in the front-rear direction. In this way, even if the plate member is deformed in the front-rear direction, the left and right brackets move substantially parallel to each other in the front-rear direction. Therefore, complicated stress does not act on the left and right body frames.
[0014]
It is also possible to fix the plate member to the bracket with fastening members at least at two locations on the top and bottom. When the plate member is attached to the bracket by a fastening member such as a bolt, the rolling resistance can be imparted to the engine mount bracket by fixing it at least at two locations.
[0015]
The bracket can be fixed to the center of the vehicle body frame having a U-shaped longitudinal section. In this way, the durability of the vehicle body frame can be further improved by fixing the bracket to a portion where the deformation stress of the vehicle body frame is small.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of an engine mount bracket structure according to the present invention will be described in detail with reference to FIGS.
[0017]
As shown in FIG. 1, the engine mount bracket is formed by a pair of left and right brackets 1, 11 and two (a plurality of) plate members 21 attached between the pair of brackets 1, 11. Is done.
[0018]
As shown in FIGS. 2 and 3, the brackets 1 and 11 sandwich the central inclined portions 2 and 12, the upper frame mounting portions 3 and 13 extend vertically, and the lower bracket mounting horizontally extends. Parts 4 and 14 are formed, respectively. Planar engine mounting portions 5 and 15 are formed on the inclined portions 2 and 12 of the brackets 1 and 11. As shown in FIGS. 1 and 2, a lateral rod mounting portion 6 is formed at the front lower portion of the left bracket 1.
[0019]
As shown in FIGS. 2 and 3, the brackets 1 and 11 are fixed to the left and right vehicle body frames 31 and 32 with bolts and nuts. At this time, the frame attaching portions 3 and 13 are fixed to the outer side surfaces of the center portions 31a and 32a of the body frames 31 and 32 formed in a U-shape.
[0020]
Two plate members 21 made of spring steel are vertically and laterally attached to bracket mounting portions 4 and 14 of the left and right brackets 1 and 11 by bolts 22 (fastening members) and nuts 23 (fastening members). They are attached approximately parallel to each other with an interval in the direction. The two plate members 21 are fixed by bolts 22 and nuts 23 at two locations, upper and lower.
[0021]
One end of the engine (not shown) is attached to the engine attachment portions 5 and 15 of the brackets 1 and 11 via rubber mounts or the like. As shown in FIGS. 1 and 2, the lateral rod 33 of the front wheel air suspension is attached to the lateral rod attachment portion 6 of the left bracket 1.
[0022]
In this way, in the engine mount bracket structure, the left and right brackets 1 and 11 are connected by the two plate members 21 that are vertically attached to the lateral direction and spaced in parallel in the front-rear direction. A strong box structure by the engine mount bracket and the vehicle body frames 31 and 32 in front of the engine mount bracket is eliminated, and a flexible structure is formed. Therefore, as shown in FIG. 4, when the handle is turned, the plate member 21 is greatly deformed in the front-rear direction with respect to the inertial force of the vehicle body, and the bending stress of the vehicle body frames 31, 32 at the rear of the engine mount bracket is greatly increased. Decrease.
[0023]
In particular, in a vehicle equipped with an air suspension, when the lateral rod 33 is attached to the left bracket 1 and the handle is turned, the inertial force of the vehicle body and the stress from the air suspension act in the same direction. However, the above action of the plate member 21 sufficiently reduces the bending stress of the vehicle body frame behind the engine mount bracket.
[0024]
In addition, since the plate member 21 is made of spring steel, sufficient deformation strength can be secured for the plate member 21. Further, since the two plate members 21 are attached in parallel with each other in the front-rear direction, the left and right brackets 1 and 11 are substantially parallel to each other in the front-rear direction even if the plate member 21 is deformed in the front-rear direction. Moving. Therefore, no complicated stress acts on the left and right body frames 31 and 32.
[0025]
Further, since the plate member 21 is fixed to the brackets 1 and 11 by the bolts 22 and the nuts 23 at the upper and lower portions, the rolling rigidity can be given to the engine mount bracket. Furthermore, since the brackets 1 and 11 are fixed to the central portions 31a and 32a where the deformation stresses of the vehicle body frames 31 and 32 are small, the durability of the vehicle body frames 31 and 32 can be further improved.
[0026]
The engine mount bracket structure is not necessarily intended only for vehicles equipped with an air suspension, and can also be implemented for vehicles not equipped with a lateral rod. The plate member described above does not necessarily need to be formed from spring steel. Further, it is not always necessary to attach a plurality of plate members. Furthermore, the plate member does not necessarily have to be fixed to the vehicle body frame at two locations, upper and lower, by the fastening member. It can also be fixed by other methods such as welding. The left and right brackets do not necessarily have to be attached to the center of the body frame.
[0027]
【The invention's effect】
As described above in detail, in the engine mount bracket structure of the present invention, a pair of opposing brackets on which the engine is mounted are fixed to the left and right body frames, and a plate member is disposed in the lateral direction between the pair of brackets. Since the pair of brackets are connected vertically to each other, the bending stress of the vehicle body frame behind the engine mount bracket can be greatly reduced.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an engine mount bracket structure of the present invention.
FIG. 2 is a rear view showing the engine mount bracket of FIG. 1;
FIG. 3 is a plan view showing the engine mount bracket of FIG. 1;
FIG. 4 is a simplified view showing a deformation of the vehicle body frame of the engine mount bracket structure of the present invention.
FIG. 5 is a partial perspective view showing a conventional engine mount bracket structure.
FIG. 6 is a simplified diagram showing a modification of a vehicle body frame having a conventional engine mount bracket structure.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Bracket 2 Inclined part 3 Frame attaching part 4 Bracket attaching part 5 Engine attaching part 6 Lateral rod attaching part 11 Bracket 12 Inclined part 13 Frame attaching part 14 Bracket attaching part 15 Engine attaching part 21 Plate member 22 Bolt 23 Nut 31, 32 Car body Frames 31a and 32a Central portion 33 Lateral rod 101 Bracket 102 Engine mount member 103 Car body frame 104 Lateral rod

Claims (4)

A pair of opposing brackets (1, 11) on which the engine is mounted are fixed to the left and right vehicle body frames (31, 32), and a plate member (21) is attached vertically between the pair of brackets. An engine mount bracket structure characterized by connecting the pair of brackets and forming the plate member with spring steel .   The engine mount bracket structure according to claim 1, wherein a lateral rod (33) of an air suspension is attached to the bracket (1). The engine mount bracket structure according to claim 1 or 2 , wherein a plurality of the plate members (21) are attached substantially parallel to each other with a space in the front-rear direction. Either the central portion (31a, 32a) claims 1, characterized in that fixed to 3 of the bracket said body frame (1, 11) a longitudinal section is formed in a U-shape (31, 32) The engine mount bracket structure described in 1.

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