JP2004299598A - Supporting structure of driving device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To propose a supporting structure of a driving device having excellent mountability and assembling workability without generating mismatching of a driving device side and a chassis frame side. <P>SOLUTION: Each one end 10a and 11a of a pair of mutually faced brackets 10 and 11 having each other end 10b and 11b extended to the vehicle width direction W inside is fixed to a pair of left and right side rails 4 and 5 extended in a vehicle front and rear direction. A center part 24c of a suspension member 24 extended in the vehicle width direction W and having both the end parts 24a and 24b connected to each other end 10b and 11b of each bracket 10 and 11 is expanded in either one direction of the vehicle front and rear direction with a line segment O for linking connecting parts 27 and 28 with the mounting brackets 10 and 11 formed at each of both the end parts as a center, and a mounting part 25 is formed. The driving device 1 is supported in advance at the center part 24c and both the end parts of the suspension member 24 are connected to each other end 10b and 11b of each bracket 10 and 11. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a support structure for a driving device such as an engine and a transmission.
[0002]
[Prior art]
Patent Document 1 discloses a conventional drive device support structure. In Patent Literature 1, a driving device is suspended from a cross member that is disposed in a vehicle width direction with respect to a pair of left and right side rails and has both ends connected to the side rails. In this structure, a bracket to be mounted on the drive device is offset and formed in advance, and the mounting direction of the bracket is changed according to the length of the drive device, and the bracket is connected to the cross member.
[0003]
[Patent Document 1]
JP-A-5-155261
[Problems to be solved by the invention]
In the case where the driving device is connected to the cross member as in Patent Literature 1, since a bracket serving as a mounting member for the cross member is not mounted on the driving device side, the driving device is temporarily suspended while suspended with a crane or the like. The position of the drive device must be lowered to the position below the member, and the connecting operation must be performed on the cross member in a suspended state, and the mounting and assembling properties are not good. Generally, when a drive device is mounted on a chassis frame including side rails and cross members, the chassis frame and the drive device are manufactured on different manufacturing lines, and then the drive device is assembled to the chassis frame on the mounting line. For this reason, in the drive device manufacturing line, the mounting direction of the bracket is changed according to the length of the drive device, and the position of the cross member and the mounting portion formed thereon are also changed on the chassis frame side in accordance with the direction of the bracket. It is necessary to change the direction, and there is a possibility that the drive device side and the chassis frame side may mismatch on the mounting line.
SUMMARY OF THE INVENTION It is an object of the present invention to propose a support structure of a drive device which has good mountability and assemblability and does not cause a mismatch between the drive device side and the chassis frame side.
[0005]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, a pair of brackets according to the present invention, each having one end fixed to a pair of left and right side rails extending in the vehicle front-rear direction, and the other end extending inward in the vehicle width direction and facing each other, A support structure extending in the width direction, the both ends of which are connected to the other ends of the pair of brackets, respectively, and a suspension member for supporting the drive device downward at a central portion. A mounting portion for supporting the driving device is formed in the portion, and the center portion where the mounting portion is formed is centered on a line connecting a connecting portion with a pair of mounting brackets respectively formed on both ends thereof, Both ends of the suspension member are connected to the other ends of the pair of brackets in a state where the suspension member is expanded in any one of the front and rear directions and the driving device is supported by the suspension member.
For this reason, the suspension member on which the driving device is supported can be connected from above to a pair of brackets extending inward in the vehicle width direction. Further, by changing the direction of the suspension member with respect to the driving device, it is possible to cope with driving devices having different lengths in the vehicle front-rear direction.
[0006]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. In FIG. 4, reference numeral 1 indicates a drive unit in which the engine 2 and the transmission 3 are integrated. In the drive device 1, a front side of an engine 2 is mounted on a pair of left and right side rails 4 and 5 via an engine mount 6, and a rear side of a transmission 3 is supported by side rails 4 and 5 by a support structure described below. Attached to. The side rails 4 and 5 form a ladder-shaped chassis frame 7 in combination with a plurality of cross members 43 having both ends fixed to the side rails 4 and 5. A cab 40 forming a body is mounted on a front portion of the chassis frame 7, and a loading platform 42 forming a body is mounted on the chassis frame 7 behind the cab 40. The cab 40 has a shape that is recessed upward from the center of the floor 41 to a lower portion in order to make a portion located above the engine 2 a storage space for the drive device 1. Is formed so that the foot of the occupant 44 is located at the right side. In FIG. 4, only one side rail is shown.
[0007]
As shown in FIG. 1, the side rails 4 and 5 each extend in a vehicle front-rear direction indicated by an arrow A (hereinafter, referred to as “front-rear direction A”). As shown in FIG. 2, the side rails 4 and 5 have a U-shaped cross section, and are disposed so that their opening sides face the center in the vehicle width direction W and face each other. On the side rails 4 and 5 near the side where the transmission 3 is supported, phosphorus hoses 8 and 9 each having a partially closed cross-sectional structure are fastened to the inner surfaces of the side rails 4 and 5 with bolts and nuts, respectively. ing.
[0008]
Flange portions 14 and 15 provided at one ends 10a and 11a of mount brackets 10 and 11 serving as a pair of brackets are fastened and fixed to the phosphorus hoses 8 and 9 by bolts and nuts. The other ends 10b and 11b of the mount brackets 10 and 11 extend inward in the vehicle width direction W and are arranged to face each other. As shown in FIG. 3, the mount brackets 10 and 11 have a U-shaped cross section, and are arranged such that the opening sides thereof are located upward. For this reason, the mount bracket 10 is disposed such that the wall portions 101 and 102 are located in the front-rear direction A, and the wall portion 103 (hereinafter, referred to as a “bottom portion 103”) is located below the wall portions 101 and 102. The wall portions 111 and 112 are located in the front-rear direction A, and the wall portion 113 (hereinafter, referred to as a “bottom portion 113”) is disposed below the wall portions 111 and 112.
[0009]
Cylindrical cushion rubbers 16 and 17 serving as elastic members are mounted on the bottom portions 103 and 113 located between the wall portions 101 and 111 and the wall portions 102 and 112, and vibration generated from the driving device 1 is not affected by the chassis. Transmission to the frame 7 side is reduced. As shown in FIG. 2, the bottoms 103 and 113 are inclined downward from the inside to the outside in the vehicle width direction W. Plate-shaped auxiliary members 18 and 19 having inclined portions 18a and 19a substantially parallel to the bottom portions 103 and 113 are attached to the upper portions of the cushion rubbers 16 and 17, respectively. For this reason, the cushion rubbers 16 and 17 are mounted on the mount brackets 10 and 11 while being sandwiched between the bottom portions 103 and 113 and the auxiliary members 18 and 19. Adjusting members 20, 21 for forming a substantially horizontal surface on the inclined portions 18a, 19a are fixed by welding. At the inner ends of the adjusting members 20 and 21 and the auxiliary members 18 and 19, as shown in FIGS. 5 and 6, a plurality of holes 22 and 23 serving as attachment portions are formed so as to penetrate vertically. I have. Reinforcement members 29 and 30 are fixed by welding between the wall portions 101 and 102 and the wall portions 111 and 112, respectively.
[0010]
On the transmission 3 side of the driving device 1, a mount boss 3A having a flat upper surface is formed. The mounting boss 3A extends in the vehicle width direction W, and bolts 27, 27, 28, 28 and holes 22, 22, 23, 23 serving as connecting portions formed at both ends 24a, 24b thereof are provided. Is attached to the central portion 24c of the support bracket 24 which is a suspension member to be connected by being tightened with a nut. The holes 27, 27 and the hole 28 and the hole portions 22 and the hole 23, as shown in FIG. 1, are arranged coaxially O respectively, on _{O 1.}
[0011]
A plurality of holes 25 are formed in the central portion 24c of the support bracket 24, which are arranged on the same line # _{1 in the} vehicle width direction W and serve as mounting portions that penetrate the support bracket 24 in the vertical direction. A screw hole 26 is formed in the mount boss 3 </ b> A facing each hole 25. The support bracket 24 supports the driving device 1 under the support bracket 24 by joining the upper surface of the mount boss 3A to the lower surface of the central portion 24c and screwing bolts from the holes 25 to the respective screw holes 26.
[0012]
The central portion 24c of the support bracket 24 is swelled in any direction in the vehicle front-rear direction A about a line segment ぐ connecting each hole 27 and each hole 28. In the present embodiment, it is curved and formed to expand toward the front direction F of the vehicle. Distance P between the line segment O and the line segment O ₁ is the interval corresponding to the difference in length in the vehicle longitudinal direction A of the drive unit 1.
[0013]
In the support structure having such a configuration, the phosphorus hoses 8 and 9 are fastened to the side rails 4 and 5 in a manufacturing line of the chassis frame 7 (not shown). The mount brackets 10 and 11 in which the cushion rubbers 16 and 17, the auxiliary members 18 and 19, and the adjustment members 20 and 21 are assembled in advance and are in an assembled state are fastened to the phosphorus hoses 8 and 9. In the production line on the drive device 1 side, the engine 2 and the transmission 3 are integrated, and the support bracket 24 is mounted on the mount boss 3A. The drive unit 1 and the chassis frame 7 manufactured in each of these lines are arranged such that both ends 24a and 24b of the mount bracket 24 are mounted on the mounting brackets 10 and 11 of the chassis frame 7 from above. Are mounted on the auxiliary members 18 and 19 and the adjustment members 20 and 21 which constitute the other ends 10b and 11b of the first and second members. Then, in a state where the driving device 1 is supported by the support bracket 24, the holes 27 and the holes 22 and the holes 28 and the holes 23 are aligned, bolts are inserted into the holes, and tightened with the nuts. Both ends 24a and 24b of the support bracket 24 are connected to the other ends 10b and 11b of the pair of brackets 10 and 11, respectively.
[0014]
When the length in the vehicle front-rear direction A is longer than the drive device 1 shown by a virtual line in FIG. 7, for example, as indicated by a solid line, there is no change on the chassis frame 7 side and the support This can be achieved by inverting the direction of the bracket 24 by 180 degrees from the state shown in FIG. 1 and attaching the support bracket 24 to the mount bosses 3A of the driving device 1 'having different overall lengths.
[0015]
As described above, by changing the mounting direction of the support bracket 24 with respect to the drive device 1, the same members can be easily used for the drive devices 1 and 1 'having different lengths in the vehicle longitudinal direction A. Therefore, mismatch between the drive device 1 and the chassis frame 7 does not occur. Further, as in the present embodiment, the support bracket 24 is mounted on the drive devices 1 and 1 'and mounted on the mount brackets 10 and 11 connected to the side rails 4 and 5, so that the drive device 1 as in the prior art is used. It is not necessary to perform the operation of temporarily lowering the lower part of the cross member below or suspending the connecting work while suspending the device with a crane or the like, and the mounting and assembling properties are improved.
[0016]
To facilitate positioning of the support bracket 24 with respect to the mount brackets 10 and 11, for example, as shown in FIG. 6, pins 31 and 32 are provided on the upper portions of the brackets 10 and 11 and holes through which the pins 31 and 32 are inserted. If the support brackets 24 are formed at both ends 24a, 24b of the support bracket 24, when the support bracket 24 is mounted on the brackets 10, 11, the holes 34, 35 and the pins 31, 32 are aligned with each other. do it.
[0017]
【The invention's effect】
According to the present invention, the suspension supporting member supporting the driving device can be connected to the pair of brackets extending inward in the vehicle width direction from above, so that the driving device is suspended by a crane or the like as in the related art. While lowering, there is no need to perform a lowering operation once below the cross member or to perform a connecting operation in a suspended state, so that mountability and assemblability are improved. In addition, since the suspension member is expanded in any direction in the vehicle front-rear direction around the line connecting the connecting portions with the pair of brackets formed at both ends thereof, By changing the direction of the suspension member, it is possible to cope with a driving device having a different length in the vehicle front-rear direction, thereby preventing a mismatch between the driving device side and the chassis frame side.
[Brief description of the drawings]
FIG. 1 is a plan view showing a configuration of a support structure of a driving device according to an embodiment of the present invention.
FIG. 2 is a front view showing a configuration of a support structure of the driving device.
FIG. 3 is a partially enlarged perspective view showing a configuration of a support structure of the driving device.
FIG. 4 is a side view showing a mounting state of a driving device on a side rail.
FIG. 5 is a partially exploded plan view of a support structure of the driving device.
FIG. 6 is a front view showing a mounting process of the drive device side with respect to the chassis frame side.
FIG. 7 is a plan view for explaining attachment when the suspension support member is inverted.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Drive device 4, 5 A pair of side rails 10, 11 A pair of brackets 10a, 11a One end 10b, 11b The other end 24 Suspension support member (support bracket)
24a, 24b Both end portions 24c Central portion 25. Mounting portion 27, 28 Connecting portion A Vehicle longitudinal direction O Line connecting connecting portion W Vehicle width direction

Claims (1)

A pair of left and right side rails extending in the vehicle front-rear direction, one end of each side rail is fixed to each side rail, the other end extends inward in the vehicle width direction and a pair of brackets facing each other, and extends in the vehicle width direction, A support structure of the driving device, the both ends of which are connected to the other ends of the pair of brackets, respectively, and a suspension member for supporting the driving device downward at a central portion,
A mounting portion for supporting the driving device is formed in the central portion, and the central portion formed with the mounting portion is a line segment connecting a connecting portion with the pair of mounting brackets formed at both ends. The center is inflated in any direction of the vehicle front-rear direction, the driving device is supported by the suspension member, and both ends of the suspension member are connected to the other ends of the pair of brackets. Characteristic support structure of the driving device.

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