JP2016137840A - Power train supporting structure of vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power train supporting structure of a vehicle 1, which can stably support a rear mount bracket 80 by suppressing loosening of a rear fastening bolt 106.SOLUTION: A power train supporting structure of a vehicle 1 comprises a power train 7 having a transverse engine 10 and a transfer 30, and a rear mount bracket 80 for supporting the power train 7. The power train 7 is provided with an intermediate bracket 40 connected to the rear mount bracket 80. The intermediate bracket 40 is provided with a rear bracket insertion hole 45a into which a rear fastening bolt 106 is inserted. The transfer 30 is provided with a transfer insertion hole 37a into which the rear fastening bolt 106 is inserted. A transmission 20 is provided with a boss part 21 to which the rear fastening bolt 106 is screwed. A rear side fastening part 160 is composed of the rear bracket insertion hole 45a, the transfer insertion hole 37a, the boss part 21, and the rear fastening bolt 106.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a powertrain support structure for a vehicle in which, for example, a powertrain provided with a transfer that transmits the output of a horizontally mounted engine to rear wheels is supported by a mount bracket.

2. Description of the Related Art Conventionally, in a vehicle including a horizontally mounted engine whose rotational axis is positioned in the vehicle width direction, a front wheel drive vehicle that drives only front wheels and a four wheel drive vehicle that drives four wheels may be set.
In the case of a front-wheel drive vehicle, a power train composed of a horizontally mounted engine and a transmission includes, for example, a right mount bracket and a left mount bracket attached to both ends in the vehicle width direction, and a rear mount bracket attached to the transmission. It is supported by the vehicle body via

On the other hand, in the case of a four-wheel drive vehicle, a power train composed of a horizontally mounted engine, a transmission, and a transfer is mounted on a transfer, for example, a right mount bracket and a left mount bracket that are mounted at both ends in the vehicle width direction. It is supported by the vehicle body via a rear mount bracket.
As described above, the rear mount bracket is connected to the transmission in the front-wheel drive vehicle, but may be connected to the transfer in the four-wheel drive vehicle.

  For example, in a vehicle powertrain structure described in Patent Document 1, in a four-wheel drive vehicle of a horizontally mounted engine, a front portion of a rear mount bracket (engine rear mount bracket 66) is fastened to a rear portion of a transfer, The rear portion (member side mounting member 60) is fastened to the vehicle body.

  When the rear mount bracket is fastened only to the rear part of the transfer as in Patent Document 1, an excessive load is applied to the transfer and the rear mount bracket when the power train swings due to road surface unevenness or the like.

  For this reason, for example, the contact surfaces of the transfer and the rear mount bracket may slide slightly, and the fastening bolts that fasten the transfer and the rear mount bracket may be loosened.

Japanese Patent Laid-Open No. 2003-104078

  In view of the above-described problems, an object of the present invention is to provide a vehicle powertrain support structure that can stably support a rear mount bracket by suppressing loosening of a fastening bolt.

  According to the present invention, the output of the transmission is transmitted via a transverse engine whose rotational axis is positioned in the vehicle width direction of the vehicle, a transmission that transmits the output of the lateral engine to a front wheel via a drive shaft, and a propeller shaft. A powertrain support structure for a vehicle, comprising: a powertrain configured by transfer for transmission to a rear wheel; a rear mount bracket for connecting the rear portion of the powertrain and the vehicle body and elastically supporting the powertrain so as to be swingable; The transfer and the transmission are configured to be fastened at a plurality of locations, the power train is provided with an intermediate bracket that connects the front portion of the rear mount bracket and the transfer, and the intermediate bracket includes the Fastening bolt to connect transfer A plurality of bracket insertion holes that allow the insertion of the fastening bolts, and the transmission includes the bracket insertion holes of the intermediate bracket and the transfer. The transfer insertion hole and a boss part into which the fastening bolt is screwed, the bracket insertion hole of the intermediate bracket, the transfer insertion hole of the transfer, the boss part of the transmission, It is characterized in that at least one co-fastening portion is constituted by the fastening bolt.

The intermediate bracket may be a bracket having elasticity and a mount bush connected to the front portion of the rear mount bracket. Or it can be set as the bracket etc. which are not provided with the mount bush, In this case, you may provide the mount bush which has elasticity in the front part of a rear mount bracket.
The vehicle body can be a skeleton member such as a frame constituting the vehicle body, or a reinforcing member such as a cross member that reinforces the skeleton member.

According to the present invention, it is possible to stably support the rear mount bracket by suppressing the looseness of the fastening bolt.
Specifically, by connecting the transfer and the rear mount bracket via an intermediate bracket, the powertrain support structure of the vehicle has a transfer and a rear mount bracket suitable for each vehicle type without creating a transfer case. Can be linked.

  And since the transmission, the transfer, and the intermediate bracket are fastened together by at least one joint fastening portion, the powertrain support structure of the vehicle has an intermediate bracket when the powertrain swings due to road surface unevenness or the like. Can be transmitted to the transmission via the fastening bolt.

  Thereby, the powertrain support structure of the vehicle can suppress, for example, slight sliding on the contact surface between the transfer and the intermediate bracket, and can suppress loosening of the fastening bolt. Alternatively, since the powertrain support structure of the vehicle can reduce the load acting on the transfer, breakage of the transfer can be prevented.

  Accordingly, the powertrain support structure of the vehicle includes at least one joint fastening portion that integrally fastens the transmission, the transfer, and the intermediate bracket, thereby suppressing the loosening of the fastening bolt and stabilizing the rear mount bracket. Can be supported.

As an aspect of the present invention, among the plurality of fastening portions that fasten the transmission and the transfer, the joint fastening portion can be disposed between the fastening portions adjacent in a vehicle side view.
The adjacent fastening portions may be fastening portions that are adjacent in the vehicle front-rear direction or the vehicle vertical direction, or fastening portions that are adjacent in the clockwise direction in a side view of the vehicle.

According to this invention, the vehicle powertrain support structure can further suppress the loosening of the fastening bolt and ensure a stable support state of the rear mount bracket.
Specifically, among the fastening portions between the transmission and the transfer, between the fastening portions adjacent to each other when viewed from the side of the vehicle, a relatively rigid range is obtained, and bending deformation hardly occurs when a load is applied.

  Therefore, by arranging the joint portions between the adjacent fastening portions, the powertrain support structure of the vehicle can improve the rigidity in the vicinity of the boss portion of the transmission to which the fastening bolt is screwed. Thereby, the powertrain support structure of the vehicle can improve the support rigidity of the intermediate bracket in the fastened state.

For this reason, the powertrain support structure of the vehicle can further suppress the loosening of the fastening bolt.
Therefore, since the powertrain support structure of the vehicle can more reliably suppress the loosening of the fastening bolt by arranging the joint fastening portion between the adjacent fastening portions, it can ensure a stable support state of the rear mount bracket. Can do.

  As an aspect of the present invention, the joint fastening portion can be disposed in the vicinity of the output shaft of the transfer to which the propeller shaft is coupled in a vehicle side view.

According to the present invention, the powertrain support structure for a vehicle can suppress loosening of the fastening bolt and reduce gear noise transmitted to the vehicle body via the rear mount bracket.
Specifically, the transfer outputs the output of the transmission to a propeller shaft connected to the drive pinion, for example, via a ring gear and a drive pinion gear arranged inside.

  At this time, gear noise generated due to the meshing of the gear pair is transmitted to the vehicle body through the transfer case and the rear mount bracket that pivotally support the drive pinion. For this reason, there is a risk of discomfort to the occupant due to the gear noise transmitted to the vehicle interior.

  Therefore, by providing the joint fastening part, the powertrain support structure of the vehicle is transmitted to the transmission through the transfer case and the rear mount bracket, to the transmission through the transfer case and the fastening bolt. The gear noise can be distributed and transmitted to the transmission path.

  At this time, since the tightening portion is disposed in the vicinity of the output shaft of the transfer, the powertrain support structure of the vehicle generates gear noise on the transmission side as compared with the case where the tightening portion is disposed at a position separated from the output shaft. It can be transmitted more easily.

Thereby, the powertrain structure of the vehicle can reduce gear noise transmitted from the vehicle body to the vehicle interior via the rear mount bracket, and can reduce discomfort given to the occupant.
Therefore, the powertrain support structure of the vehicle can suppress the loosening of the fastening bolt and reduce the gear noise transmitted to the vehicle body via the rear mount bracket by arranging the tightening portion in the vicinity of the output shaft of the transfer. Can do.

Further, as an aspect of the present invention, the transmission, the transfer, and the intermediate bracket are integrally provided with a plurality of the tightening portions, and the transmission and the transmission are adjacent to each other between the adjacent tightening portions in a vehicle side view. At least one fastening portion with the transfer can be arranged.
The adjacent tightening portions may be, for example, a side tightening portion adjacent in the vehicle front-rear direction or the vehicle vertical direction, or a side tightening portion adjacent in the clockwise direction in a side view of the vehicle.

According to the present invention, the powertrain support structure for a vehicle can more reliably suppress the loosening of the fastening bolt and ensure a more stable fastening state between the transmission and the transfer.
Specifically, by providing a plurality of co-fastening portions, the vehicle powertrain support structure can transmit the load acting on the intermediate bracket to the transmission via a plurality of fastening bolts.

  As a result, the vehicle powertrain support structure can more reliably suppress loosening of the fastening bolts and more reliably prevent breakage of the transfer.

  Furthermore, by distributing the load acting on the intermediate bracket to the transmission via a plurality of fastening bolts, the vehicle powertrain support structure can transfer the load transmitted to the transmission via the transfer and fastening portion. Can be reduced. For this reason, the powertrain support structure of a vehicle can suppress the loosening of the bolt in the fastening part located between adjacent joint fastening parts.

  Therefore, the powertrain support structure of the vehicle can more reliably suppress the loosening of the fastening bolts by arranging the fastening part between the transmission and the transfer between the adjacent joint fastening parts, and more stable transmission and transfer. Can be secured.

  According to the present invention, it is possible to provide a vehicle powertrain support structure capable of stably supporting a rear mount bracket by suppressing loosening of a fastening bolt.

Explanatory drawing explaining the structure of a vehicle. The top view which shows the external appearance of the power train in a vehicle. The principal part right view which shows the principal part of the powertrain support structure in a right side view. The principal part perspective view which shows the principal part of the powertrain support structure in an assembly | attachment state. The disassembled perspective view which shows the state which removed the intermediate bracket. Explanatory drawing explaining the cross section along the vehicle width direction in a front side fastening part and a rear side fastening part.

An embodiment of the present invention will be described below with reference to the drawings.
First, the powertrain support structure of the vehicle 1 in the present embodiment will be described in detail with reference to FIGS. 1 to 6.

  FIG. 1 is an explanatory diagram for explaining the configuration of the vehicle 1, FIG. 2 is a plan view of the appearance of the power train 7 in the vehicle 1, and FIG. 3 is a right side view of the main part of the power train support structure in the right side view. 4 is a perspective view of the main part of the powertrain support structure in the assembled state, FIG. 5 is an exploded perspective view of the state where the intermediate bracket 40 is removed, and FIG. 6 is a front side fastening portion 150 and a rear side. Explanatory drawing explaining the cross section along the vehicle width direction in the side fastening part 160 is shown.

  Further, in order to clarify the main part in FIG. 3, the outer shape of the transmission 20 is indicated by a two-dot chain line, and in order to clarify the illustration in FIGS. 4 and 5, the transfer case among the components of the transfer 30. Only 31 is illustrated. Further, FIG. 6A in FIG. 6 shows a cross-sectional view of the front side fastening portion 150, and FIG. 6B shows a cross-sectional view of the rear side fastening portion 160.

  Furthermore, in the figure, arrows Fr and Rr indicate the vehicle front-rear direction, arrow Fr indicates the vehicle front, and arrow Rr indicates the vehicle rear. Furthermore, arrows Rh and Lh indicate the vehicle width direction, arrow Rh indicates the vehicle right direction, and arrow Lh indicates the vehicle left direction. In addition, the upper side in FIG. 3 is the upper side of the vehicle, and the lower side in FIG. 3 is the lower side of the vehicle.

  As shown in FIG. 1, the vehicle 1 transmits the output of a horizontally mounted engine 10 disposed so that a crankshaft is positioned along the vehicle width direction to a front wheel 3 via a drive shaft 2, and This is a so-called FF-based four-wheel drive vehicle in which a power train 7 for transmitting the output of 10 to the rear wheel 6 via the propeller shaft 4 and the rear differential 5 is disposed in the front part thereof.

  More specifically, as shown in FIG. 2, the front portion of the vehicle 1 includes a pair of left and right front side frames (not shown) extending from the dash panel (not shown) to the front of the vehicle, and a sub disposed below the front side frame. The power train 7 is disposed between the frame 50 and the steering gear box 8 fixed to the rear portion of the subframe 50 so that the horizontally placed engine 10 is positioned in front of the vehicle.

  The steering gear box 8 connects a steering wheel (not shown) operated by an occupant and the front wheel 3, and performs an input rotation due to the operation of the steering wheel in a substantially cylindrical main body cylinder portion 8a extending in the vehicle width direction. It functions as a steering device that changes the direction of the front wheel 3 via a gear housed in (see FIG. 3).

  The subframe 50 has a pair of left and right front and rear members 51 extending in the vehicle front-rear direction, a front cross member 52 that connects the front ends of the front and rear members 51 in the vehicle width direction, and the rear end of the front and rear members 51 in the vehicle width direction. The suspension cross member 53 to which a suspension member such as the lower arm 9 is connected is integrally formed in a substantially rectangular shape in plan view.

As shown in FIG. 3, the suspension cross member 53 is integrally formed by joining an upper panel 531 positioned on the upper side of the vehicle and a lower panel 532 positioned on the lower side of the vehicle in the vertical direction of the vehicle. Yes.
More specifically, as shown in FIG. 3, the upper panel 531 has a cross section along the vehicle front-rear direction formed into a cross-sectional hat shape opened at the vehicle lower side.

On the upper surface of the upper panel 531, a bolt opening hole (not shown) that allows insertion of a connecting bolt 54 that connects a rear mount bracket 80, which will be described later, is formed in the vehicle up-down direction at approximately the center in the vehicle width direction of the vehicle 1. ing.
Further, the front surface of the upper panel 531 is provided with a bracket insertion hole 531a in which a rear mount bracket 80, which will be described later, is formed so as to be open from the front of the vehicle.

  As shown in FIG. 3, the lower panel 532 has a substantially flat plate-like cross section along the vehicle front-rear direction. The lower panel 532 is formed with a bolt opening hole (not shown) that allows the coupling bolt 54 to be inserted so as to face the bolt opening hole of the upper panel 531 in the vertical direction of the vehicle, and a weld to which the coupling bolt 54 is screwed. A nut 55 is welded.

  As shown in FIGS. 2 and 3, the power train 7 includes a right mount bracket 60 disposed along the vehicle width direction from the right side of the vehicle in a space surrounded by a pair of left and right front side frames and the sub frame 50. And a left mount bracket 70, a right mount bracket 60, and a rear mount bracket 80 disposed behind the left mount bracket 70 so as to be swingable on the vehicle body side.

  As shown in FIG. 2, the right mount bracket 60 connects the upper part on the right side in the vehicle width direction of the horizontally mounted engine 10 and the front side frame on the right side of the vehicle in a swingable manner. The right mount bracket 60 includes an engine side bracket 61 fixed to the horizontally mounted engine 10 and a vehicle body side bracket 62 fixed to the front side frame via an elastic rubber mount bush (not shown). Concatenated.

  As shown in FIG. 2, the left mount bracket 70 slidably connects the upper left portion of the transmission 20 in the vehicle width direction and the front side frame on the left side of the vehicle. The left mount bracket 70 connects a transmission side bracket 71 fixed to the transmission 20 and a vehicle body side bracket 72 fixed to the front side frame via an elastic rubber mount bush (not shown). Is configured.

  As shown in FIG. 3, the rear mount bracket 80 has a rear portion of the power train 7 (an intermediate bracket 40 described later) and a suspension cross member 53 that are swingably connected to each other at approximately the center in the vehicle width direction of the vehicle 1. Yes.

  More specifically, the rear mount bracket 80 includes a bracket front portion 81 that is swingably connected to the rear portion of the power train 7 by a connecting bolt 83, and a bracket that is swingably connected to the suspension cross member 53 by a connecting bolt 54. The rear portion 82 is integrally formed by joining in this order from the front of the vehicle.

  The bracket front portion 81 is configured by arranging a substantially flat metal plate having a thickness in the vehicle width direction so as to face each other at a predetermined interval in the vehicle width direction. Further, the metal flat plate on the right side of the vehicle in the bracket front portion 81 is formed with a bolt insertion hole (not shown) that allows the connection bolt 83 to be inserted. On the other hand, a weld nut (not shown) to which the connecting bolt 83 is screwed is welded to a metal flat plate on the left side of the vehicle in the bracket front portion 81.

  The bracket rear portion 82 is configured by press-fitting a mounting bush having elasticity into a metal tubular member having the vehicle vertical direction as an axial direction. As shown in FIG. 3, the bracket rear portion 82 is connected to the suspension cross member 53 by using connection bolts 54 so as to be sandwiched between the upper panel 531 and the lower panel 532.

  As shown in FIGS. 1 to 3, the power train 7 supported on the vehicle body in this manner includes a horizontally mounted engine 10 disposed so that a crankshaft is positioned along the vehicle width direction, and a horizontally mounted engine 10. The transmission 20 is configured to output the output to the drive shaft 2, the transfer 30 is configured to output the output of the transmission 20 to the propeller shaft 4, and the intermediate bracket 40 is connected to the rear mount bracket 80.

The horizontally mounted engine 10 is arranged on the left side in the vehicle width direction so that the output shaft (crankshaft) is positioned on the left side of the vehicle.
The transmission 20 is disposed on the left side of the vehicle with respect to the horizontal engine 10 and is fastened and fixed to the horizontal engine 10 so that the input shaft is positioned substantially coaxially with the output shaft of the horizontal engine 10. . The transmission 20 switches a plurality of gears to decelerate the input rotation, and outputs it to an output shaft arranged in parallel to the lower rear side of the vehicle with respect to the input shaft.

  The transmission 20 is formed with a boss portion (not shown) to which a fastening bolt for fastening the transfer 30 is screwed toward the right side of the vehicle. Further, as shown in FIGS. 4 and 5, the transmission 20 communicates with a rear bracket insertion hole 45 a of an intermediate bracket 40 described later and a rear fastening bolt 106 in a state where the transfer 30 is assembled. A boss 21 having a screw hole 21a (see FIG. 6B) is formed toward the right side of the vehicle.

  The pair of left and right drive shafts 2 connected to the output shaft of the transmission 20 are disposed substantially coaxially with respect to the output shaft of the transmission 20. The drive shaft 2 connected to the front wheel 3 on the right side of the vehicle is connected to the output shaft of the transmission 20 via the transfer 30.

The transfer 30 is arranged so that the input shaft is positioned substantially coaxially with the output shaft on the right side of the vehicle in the transmission 20. The transfer 30 has a function of outputting the input transmitted from the transmission 20 to an output shaft that is substantially orthogonal to the input shaft.
More specifically, as shown in FIG. 3, the transfer 30 is configured to be hollow inside by a transfer case 31 located at the rear of the vehicle and a cover 32 located at the front of the vehicle.

  The transfer 30 has a ring gear rotatably supported with the vehicle width direction as a rotation axis and a drive pinion gear meshing with the ring gear at the front end, and is rotatably supported with the vehicle longitudinal direction as the rotation axis. The drive pinion that is the output shaft. A companion flange 33 to which the flange yoke 4a of the propeller shaft 4 is connected is attached to the rear end of the drive pinion.

As shown in FIGS. 3 to 5, the transfer 30 having such a configuration is fastened and fixed to the right side surface of the transmission 20 using a plurality of fastening bolts.
More specifically, the left side of the transfer case 31 includes a substantially flat upper mounting base 34 extending upward and a substantially flat lower mounting base 35 extending downward. ing.

  As shown in FIGS. 3 and 4, the upper mounting base 34 is formed in a shape projecting upward in the vehicle longitudinal direction from the vicinity of the rear end of the transfer case 31 to the front end in the vehicle side view. .

  The upper mounting base 34 is formed with a bolt hole (not shown) that allows the first fastening bolt 101 inserted into the transmission 20 to pass therethrough in the vicinity of the front end. Note that a fastening portion between the transmission 20 and the transfer 30 fastened using the first fastening bolt 101 is a first fastening portion 110.

  Further, a bolt hole (not shown) that allows insertion of the second fastening bolt 102 that is screwed into the transmission 20 is formed in the upper mounting base 34 in the vicinity of the rear end. A fastening portion between the transmission 20 and the transfer 30 fastened using the second fastening bolt 102 is a second fastening portion 120.

  As shown in FIGS. 3 and 5, the lower mounting base 35 has a rear end located in the vicinity of the rear end of the transfer case 31, and a front end protruding in the vehicle front lower side than the front end of the transfer case 31. ing.

  The lower mounting base 35 is formed with a bolt hole (not shown) that allows the third fastening bolt 103 to be screwed into the transmission 20 to be inserted in the vicinity of the front end. Note that a fastening portion between the transmission 20 and the transfer 30 fastened using the third fastening bolt 103 is a third fastening portion 130.

  Further, a bolt hole (not shown) that allows the fourth fastening bolt 104 to be screwed into the transmission 20 to be inserted is formed in the lower mounting base 35 in the vicinity of the rear end. A fastening portion between the transmission 20 and the transfer 30 fastened using the fourth fastening bolt 104 is referred to as a fourth fastening portion 140.

  In addition, as shown in FIGS. 4 and 5, the lower mounting base 35 of the transfer 30 is formed with a front bracket mounting portion 36 and a rear bracket mounting portion 37 to which an intermediate bracket 40 described later is mounted.

  As shown in FIG. 5, the front bracket mounting portion 36 is integrally formed with the lower mounting base 35 so as to be erected toward the vehicle right side on the vehicle front side with respect to the third fastening portion 130. As shown in FIGS. 5 and 6A, the front bracket mounting portion 36 has a flat surface that abuts the intermediate bracket 40 on the right side of the vehicle, and has a screw hole 36a into which the front fastening bolt 105 is screwed in the vehicle width direction. It is formed along.

  As shown in FIGS. 3 to 5, the rear bracket mounting portion 37 is a vehicle between the third fastening portion 130 and the fourth fastening portion 140 at the upper portion of the lower mounting base 35 and from the vicinity of the fourth fastening portion 140. The lower mounting base 35 is integrally formed so as to be erected toward the right side. That is, the rear bracket mounting portion 37 is formed in the transfer case 31 in the vicinity of the output shaft to which the propeller shaft 4 is coupled.

  As shown in FIGS. 5 and 6B, the rear bracket mounting portion 37 is formed such that the left side of the vehicle contacts the boss portion 21 of the transmission 20 and the right side of the vehicle contacts the intermediate bracket 40.

  The rear bracket mounting portion 37 is formed with a transfer insertion hole 37 a that communicates with the screw hole 21 a of the boss portion 21 in the transmission 20 in the vehicle width direction and allows the rear fastening bolt 106 to be inserted.

  As shown in FIGS. 3 to 5, the intermediate bracket 40 includes a substantially cylindrical mount bush 41 having an axial direction in the vehicle width direction and an aluminum alloy bracket body 42 having a predetermined thickness in the vehicle width direction. It is composed.

  Although detailed illustration is omitted, the mount bush 41 is coaxial so that a small diameter tubular member having an inner diameter into which the connecting bolt 83 can be inserted, a large diameter tubular member having a larger diameter than the small diameter tubular member, and a peripheral surface thereof face each other. It is comprised with the synthetic rubber which has the elasticity filled between the small diameter tubular member arrange | positioned above and the large diameter tubular member.

  The bracket main body 42 has a substantially cylindrical front end portion 43, a central portion 44, and a rear end portion 45 extending in the vehicle width direction in this order from the front of the vehicle, and the front end portion 43, the central portion 44, and the central portion 44. In addition, the rear end portion 45 is connected and integrally formed in a substantially V shape in a side view.

  As shown in FIGS. 5 and 6A, the front end portion 43 allows the front fastening bolt 105 to be inserted and has a front bracket insertion hole 43 a communicating with the screw hole 36 a of the front bracket mounting portion 36 in the transfer 30. It has a shape to have.

  That is, the front end portion 43 of the intermediate bracket 40 is fastened and fixed to the front bracket mounting portion 36 of the transfer 30 in a state where the transfer 30 is fastened to the transmission 20. Let this fastening location be the front side fastening part 150 (refer FIG.3 and FIG.4).

  The central portion 44 is formed in a substantially cylindrical shape having a larger diameter than the outer diameter of the front end portion 43 and having an inner diameter that allows the mounting bush 41 to be press-fitted. The central portion 44 is disposed below the drive shaft 2 and in the vicinity of a position in the vehicle vertical direction where the vicinity of the lower end of the transmission 20 and the transfer 30 overlap in the vehicle width direction.

  As shown in FIGS. 5 and 6B, the rear end portion 45 allows the rear fastening bolt 106 to be inserted at a position higher than the central portion 44 in the rear of the vehicle, and the rear bracket mounting portion 37 in the transfer 30. And the rear bracket insertion hole 45a communicating with the screw hole 21a of the boss portion 21 in the transmission 20.

  That is, the rear end portion 45 of the intermediate bracket 40 is fastened and fixed to the boss portion 21 of the transmission 20 with the rear bracket mounting portion 37 of the transfer 30 interposed therebetween in a state where the transfer 30 is fastened to the transmission 20.

  The powertrain support structure of the vehicle 1 includes the transmission 20, the transfer 30, the screw hole 21 a of the transmission 20, the transfer insertion hole 37 a of the transfer 30, the transfer insertion hole 37 a of the intermediate bracket 40, and the rear fastening bolt 106. And the rear side fastening part 160 (refer FIG.3 and FIG.4) which fastens the intermediate bracket 40 together is comprised.

  The powertrain support structure of the vehicle 1 that realizes the above-described configuration can stably support the rear mount bracket 80 by suppressing the looseness of the rear fastening bolt 106.

  Specifically, by connecting the transfer 30 and the rear mount bracket 80 via the intermediate bracket 40, the powertrain support structure of the vehicle 1 does not make a transfer case 31, and the transfer 30 is suitable for each vehicle type. And the rear mount bracket 80 can be coupled.

  And since the transmission 20, the transfer 30, and the intermediate bracket 40 are fastened together by the rear side fastening portion 160, the powertrain 7 swings due to the unevenness of the road surface in the powertrain support structure of the vehicle 1. At this time, the load acting on the intermediate bracket 40 can be transmitted to the transmission 20 via the rear fastening bolt 106.

  Thereby, the powertrain support structure of the vehicle 1 can suppress, for example, slight sliding on the contact surface between the transfer 30 and the intermediate bracket 40, and can suppress loosening of the rear fastening bolt 106. Alternatively, since the powertrain support structure of the vehicle 1 can reduce the load acting on the transfer 30, the transfer 30 can be prevented from being damaged.

  Therefore, the powertrain support structure of the vehicle 1 includes the rear side fastening portion 160 that integrally fastens the transmission 20, the transfer 30, and the intermediate bracket 40. The mount bracket 80 can be stably supported.

  Further, the rear fastening portion 160 is disposed between the third fastening portion 130 and the fourth fastening portion 140 that are adjacent to each other in a side view of the vehicle, so that the powertrain support structure of the vehicle 1 is loosened by the rear fastening bolt 106. Can be further suppressed, and a stable support state of the rear mount bracket 80 can be secured.

Specifically, the third fastening portion 130 and the fourth fastening portion 140 that are adjacent to each other in a side view of the vehicle are in a relatively high rigidity range, and are not easily deformed when a load is applied.
Therefore, by arranging the rear side fastening part 160 between the adjacent third fastening part 130 and the fourth fastening part 140, the powertrain support structure of the vehicle 1 improves the rigidity in the vicinity of the boss part 21 of the transmission 20. can do.

  Thereby, the powertrain support structure of the vehicle 1 can improve the support rigidity of the intermediate bracket 40 in the fastened state. For this reason, the powertrain support structure of the vehicle 1 can further suppress the loosening of the rear fastening bolt 106.

  Therefore, the powertrain support structure of the vehicle 1 more reliably suppresses the loosening of the rear fastening bolt 106 by arranging the rear fastening portion 160 between the adjacent third fastening portion 130 and the fourth fastening portion 140. Therefore, a stable support state of the rear mount bracket 80 can be ensured.

  Further, the rear side fastening portion 160 is disposed in the vicinity of the output shaft of the transfer 30 to which the propeller shaft 4 is connected in a side view of the vehicle, so that the powertrain support structure of the vehicle 1 suppresses the looseness of the rear fastening bolt 106. In addition, gear noise transmitted to the vehicle body via the rear mount bracket 80 can be reduced.

Specifically, the transfer 30 outputs the output of the transmission 20 to the propeller shaft 4 connected to the drive pinion via the ring gear and the drive pinion gear.
At this time, gear noise generated due to the engagement of the gear pair inside the transfer 30 is transmitted to the vehicle body via the transfer case 31 that supports the drive pinion and the rear mount bracket 80. For this reason, there is a risk of discomfort to the occupant due to the gear noise transmitted to the vehicle interior.

  Therefore, by providing the rear side fastening portion 160, the powertrain support structure of the vehicle 1 is configured such that the transmission path transmitted to the vehicle body via the transfer case 31 and the rear mount bracket 80, the transfer case 31, and the rear fastening. Gear noise can be distributed and transmitted to a transmission path that is transmitted to the transmission 20 via the bolt 106.

At this time, since the rear side fastening portion 160 is disposed in the vicinity of the output shaft of the transfer 30, the powertrain support structure of the vehicle 1 is compared with the case where the rear side fastening portion 160 is disposed at a position separated from the output shaft. Gear noise can be more easily transmitted to the transmission 20 side.
Thereby, the powertrain 7 structure of the vehicle 1 can reduce gear noise transmitted from the vehicle body to the vehicle interior via the rear mount bracket 80, and can reduce discomfort given to the occupant.

  Therefore, in the powertrain support structure of the vehicle 1, the rear side fastening portion 160 is disposed in the vicinity of the output shaft of the transfer 30, thereby suppressing the looseness of the rear fastening bolt 106 and transmitting it to the vehicle body via the rear mount bracket 80. Gear noise can be reduced.

  In the above-described embodiment, the intermediate bracket 40 having the mount bush 41 is used. However, the present invention is not limited to this, and the intermediate bracket 40 having no mount bush may be used. In this case, the bracket front portion 81 of the rear mount bracket 80 may be provided with a mount bush having elasticity.

  Further, the rear mount bracket 80 is connected to the suspension cross member 53. However, the present invention is not limited to this, and the rear mount bracket 80 may be connected to a skeleton member such as a frame constituting the vehicle body or a reinforcement member such as a cross member that reinforces the skeleton member. .

  In addition, the transfer 30 and the intermediate bracket 40 are fastened at two locations using the front fastening bolt 105 and the rear fastening bolt 106, but the invention is not limited to this, and the transfer 30 and the intermediate bracket 40 are fastened at three or more locations. It is good also as composition to do.

  Moreover, although it was set as the powertrain support structure of the vehicle 1 which has one rear side fastening part 160 which fastens the transmission 20, the transfer 30, and the intermediate | middle bracket 40, it is not limited to this, The structure fastened together in two or more places It is good.

  For example, the front fastening portion 150 is configured so that the front fastening bolt 105 is screwed to the boss portion of the transmission 20, and the transmission 20, the transfer 30, and the intermediate bracket 40 are shared by the front fastening portion 150 and the rear fastening portion 160. It is good also as a structure to fasten. At this time, the third fastening part 130 is arranged between the front fastening part 150 and the rear fastening part 160.

  As a result, the powertrain support structure of the vehicle 1 can more reliably suppress loosening of the front fastening bolt 105 and the rear fastening bolt 106 and ensure a more stable fastening state between the transmission 20 and the transfer 30. .

  Specifically, by providing the front side fastening part 150 and the rear side fastening part 160, the powertrain support structure of the vehicle 1 applies loads acting on the intermediate bracket 40 to the front fastening bolt 105 and the rear fastening bolt 106. Can be distributed to the transmission 20 via the transmission.

  As a result, the powertrain support structure of the vehicle 1 can more reliably suppress loosening of the front fastening bolt 105 and the rear fastening bolt 106 and more reliably prevent breakage of the transfer 30 and the like.

  Further, the load acting on the intermediate bracket 40 is distributed and transmitted to the transmission 20 via the front fastening bolt 105 and the rear fastening bolt 106, so that the powertrain support structure of the vehicle 1 has the transfer 30 and the third The load transmitted to the transmission 20 via the fastening part 130 can be reduced. For this reason, the powertrain support structure of the vehicle 1 can suppress loosening of the third fastening bolt 103 at the third fastening portion 130.

  Therefore, the powertrain support structure of the vehicle 1 includes the front side fastening part 150 and the rear side fastening part 160 that fasten the transmission 20, the transfer 30, and the intermediate bracket 40 together, and the front side fastening part 150 and the rear side fastening part 160. The third fastening portion 130 is disposed between the front fastening bolt 105 and the rear fastening bolt 106 more securely, and a more stable fastening state between the transmission 20 and the transfer 30 is ensured. be able to.

  In addition, although it was set as the structure by which the 3rd fastening part 130 is arrange | positioned between the front side fastening part 150 and the rear side fastening part 160, it is not limited to this, Between the front side fastening part 150 and the rear side fastening part 160 It is good also as a structure by which a some fastening part is arrange | positioned.

In correspondence between the configuration of the present invention and the above-described embodiment,
The vehicle body of the present invention corresponds to the suspension cross member 53 of the embodiment,
Similarly,
The front part of the rear mount bracket corresponds to the bracket front part 81,
The fastening bolt corresponds to the rear fastening bolt 106,
The bracket insertion hole corresponds to the rear bracket insertion hole 45a,
The joint fastening portion corresponds to the rear fastening portion 160,
The fastening portion corresponds to the first fastening portion 110, the second fastening portion 120, the third fastening portion 130, and the fourth fastening portion 140,
Adjacent fastening portions correspond to the third fastening portion 130 and the fourth fastening portion 140,
Adjacent joint fastening parts correspond to the front fastening part 150 and the rear fastening part 160,
The present invention is not limited only to the configuration of the above-described embodiment, and many embodiments can be obtained.

DESCRIPTION OF SYMBOLS 1 ... Vehicle 2 ... Drive shaft 3 ... Front wheel 4 ... Propeller shaft 6 ... Rear wheel 7 ... Power train 10 ... Horizontal engine 20 ... Transmission 21 ... Boss part 30 ... Transfer 37a ... Transfer insertion hole 40 ... Intermediate bracket 45a ... Rear bracket Insertion hole 53 ... Suspension cross member 80 ... Rear mount bracket 81 ... Bracket front part 106 ... Rear fastening bolt 110 ... First fastening part 120 ... Second fastening part 130 ... Third fastening part 140 ... Fourth fastening part 160 ... Rear side Fastening part

Claims (4)

A horizontal engine whose rotational axis is positioned in the vehicle width direction of the vehicle, a transmission that transmits the output of the horizontal engine to the front wheels via a drive shaft, and an output of the transmission to the rear wheels via a propeller shaft A powertrain composed of transfer
A powertrain support structure for a vehicle comprising a rear mount bracket for connecting the rear portion of the powertrain and the vehicle body and elastically supporting the powertrain so as to be swingable,
The transfer and the transmission are configured to be fastened at a plurality of locations,
In the powertrain,
An intermediate bracket for connecting the front portion of the rear mount bracket and the transfer;
In the middle bracket,
A plurality of bracket insertion holes allowing insertion of fastening bolts connecting the transfer;
For the transfer,
Comprising at least one transfer insertion hole allowing insertion of the fastening bolt;
In the transmission,
The bracket insertion hole of the intermediate bracket and the transfer insertion hole of the transfer, and a boss portion into which the fastening bolt is screwed.
A powertrain support structure for a vehicle in which at least one joint fastening portion is configured by the bracket insertion hole of the intermediate bracket, the transfer insertion hole of the transfer, the boss portion of the transmission, and the fastening bolt. 2. The vehicle powertrain support structure according to claim 1, wherein among the plurality of fastening portions that fasten the transmission and the transfer, the joint fastening portion is disposed between the fastening portions adjacent in a vehicle side view. The powertrain support structure for a vehicle according to claim 1 or 2, wherein the joint fastening portion is disposed in the vicinity of an output shaft of the transfer to which the propeller shaft is coupled in a side view of the vehicle. A plurality of the fastening portions that integrally fasten the transmission, the transfer, and the intermediate bracket;
In the vehicle side view, between the adjacent tightening portions,
The powertrain support structure for a vehicle according to any one of claims 1 to 3, wherein at least one fastening portion between the transmission and the transfer is disposed.

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