JP5013589B2 - Vehicle engine mount structure - Google Patents

Description

  The present invention relates to an engine mount structure for a vehicle, and more particularly to a front engine mounting structure for a power unit including an engine and a transmission.

Conventionally, as shown in FIGS. 8 and 9, the front engine mounting structure of the power unit includes a front engine mounting bracket (hereinafter referred to as a mounting bracket) 2 that is attached and fixed to the left and right sides of the power unit 1, and the mounting bracket 2. It is common to attach and fix to a vehicle body such as a front cross member via a front cushion rubber (so-called engine mount) 3 whose upper part is fastened and fixed (see, for example, Patent Document 1).
8 is a side view showing a conventional engine mount structure, and FIG. 9 is a perspective view of the mount bracket 2 and the front cushion rubber 3. As shown in FIG.

Japanese Unexamined Patent Publication No. 2000-2298

  By the way, the power unit 1 intended for a specific vehicle type is often used for a plurality of different vehicle types. The front cushion rubber 3 attached to the power unit 1 and the front cushion rubber mounting position on the vehicle body side If the mounting bracket 2 or the front cushion rubber 3 is simply deformed, it may not be attached to the vehicle body. In such a case, the mounting bracket mounting position itself of the power unit 1 must be changed. These mounting bracket mounting positions are determined depending on the cylinder block 5 of the engine 4 or the front case member 7 of the transmission 6 (for MT vehicles). In this case, it is formed integrally with a transmission case and a converter case for an AT car. For this reason, in order to change the mounting position of the mounting bracket, the cylinder block 4 or the front case member 7 has to be remade, resulting in an increase in cost.

  In addition, there is a case where the mounting bracket mounting position is not formed on either the cylinder block of the engine to be converted into a power unit or the front case member of the transmission. In such a case, the mounting bracket mounting position is newly provided. In addition, it becomes necessary to remake the cylinder block or the front case member.

  Further, a starter (not shown) for starting the engine is attached to the cylinder block 5 or the front case member 7. The starter is relatively large, and the flywheel (MT vehicle) or the torque converter ASSY (AT vehicle) equipped with a ring gear that meshes with the drive gear of the starter is disposed in the front case member 7 so that it is in the mounting position. There are limitations. Therefore, when changing the mounting bracket mounting position, consideration must be given so as not to interfere with the starter, and there is a problem that the mounting bracket mounting position is restricted.

  The present invention has been made in view of such circumstances, and the mounting bracket mounting position can be changed or newly installed without recreating the engine cylinder block or the front case member of the transmission, and at that time, it does not interfere with the starter. It is an object of the present invention to provide an engine mount structure for a vehicle that can perform the above and the like.

In order to achieve the above object, the present invention relates to a vehicle mounted on a vehicle body via a mount bracket that is fixed to the power unit and a front cushion rubber that is fixed to the mount bracket. In the engine mount structure,
Between the engine cylinder block and the front case member of the transmission, the front surface is a joint surface joined to the engine cylinder block and the rear surface is a joint surface joined to the front case member of the transmission. Via a hollow connecting member, provided with a mounting portion for mounting bracket for fixing the mounting bracket to the connecting member ;
A ring gear is rotatably arranged inside the connecting member, and the ring gear is connected to the output shaft of the engine and the input shaft of the transmission, and at a position different from the mounting bracket mounting portion of the connecting member. A starter for rotating the ring gear to start the engine is attached .

According to the present invention, the mounting portion for mounting the mounting bracket for mounting and fixing the mounting bracket is provided on the hollow connecting member interposed between the cylinder block of the engine and the front case member of the transmission. As a result, when the mounting bracket mounting position is changed or newly installed, it is only necessary to remake the connecting member. Therefore, it is not necessary to remake the cylinder block or the front case member, and the cost can be reduced. In addition, since the mounting bracket mounting position can be easily changed, the degree of freedom of the mounting position of the power unit can be increased.
Further, the difference in size, shape, and fixing bolt position between the cylinder block and the front case member is absorbed by the connecting member. As a result, the engine includes not only a specific transmission that can be joined to the engine, but also transmissions for other vehicle types (FR vehicles) that are not joined to the engine, FF vehicles, A power unit can be configured easily and at low cost by using a differential integrated transmission used in MR and RR vehicles, a so-called transaxle. In addition, this connecting member also allows a power unit to be configured by combining various types of engines for a specific transmission.
Furthermore, by incorporating a front differential mechanism into the connecting member, it becomes possible to convert the transmission used in the FR vehicle to a transaxle, so that the FR vehicle can be easily converted into an AWD at a low cost.

Also , a ring gear is rotatably arranged inside the connecting member, and the ring gear is connected to the engine output shaft and the transmission input shaft, and the ring gear is rotated to a position different from the mounting bracket mounting portion of the connecting member. A starter for driving the engine was installed. Thus, in addition to the operation and effect of the first aspect of the invention, the mount bracket mounting position can be provided at the optimum position while avoiding interference with the starter. In addition, the degree of freedom of the starter mounting position can be increased.

  According to the engine mount structure for a vehicle of the present invention, the cylinder block or the front case is provided by interposing the connecting member in which the mounting portion for the mounting bracket is formed between the cylinder block of the engine and the front case member of the transmission. It is possible to easily change the mounting position of the mounting bracket or newly install it without changing the members.

A vehicle engine mount structure according to an embodiment of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a perspective view of a connecting member used in the engine mount structure of the present embodiment, FIG. 2 is a perspective view of the connecting member to which a starter is attached, FIG. 3 is a front view of the connecting member, and FIG. FIG. 5 is a plan view of the connecting member and the transmission for the AWD vehicle in FIG. 4, and FIG. 6 is for the engine and the FR vehicle. FIG. 7 is a side view of a vertically mounted power unit with a connecting member interposed between the transmission and FIG. 7. For an AWD vehicle, a connecting member incorporating a front differential function is interposed between the engine and the FR vehicle transmission. It is a side view of the vertical power unit.
In addition, the same code | symbol is attached | subjected about the structural member similar to the past.

  As shown in FIGS. 1 to 7, the engine mount structure of this vehicle is a front engine mounting structure of a power unit 1 including an engine 4 and a transmission 6, and a cylinder block 5 of the engine 2 and a front case member 7 of the transmission 6. A mount spacer 8 is provided as a hollow connecting member interposed between a transmission case for MT vehicles and a converter case for AT vehicles.

  As shown in FIGS. 1 to 3, the mount spacer 8 is formed in a ring shape when viewed from the front. The front surface is a joint surface joined to the cylinder block 5 of the engine 4, and the rear surface is the transmission 6. It is a joint surface joined to the front case member 7. Further, a ring gear 10 (shown in FIGS. 2 and 3) that meshes with a drive gear of an engine starter 9 (shown in FIGS. 2 and 3) is rotatably disposed at a position facing the inner peripheral surface of the mount spacer 8. The ring gear 10 is connected to a crankshaft as an output shaft of the engine 4 and an input shaft (both not shown) as an input shaft of the transmission 6.

  That is, even if the mount spacer 8 is interposed between the engine 4 and the transmission 6, the crankshaft of the engine 4 and the input shaft of the transmission 6 are connected, and the engine 4 is started or the engine output is transmitted to the transmission. Can be communicated.

  In this embodiment, the ring gear 10 that is separate from the flywheel or the ring gear provided in the converter ASSY that is conventionally incorporated in the transmission 6 is arranged in the mount spacer 8. However, the flywheel or the converter ASSY provided in the transmission 6 may be disposed in the mount spacer 8.

  The mount spacer 8 is provided with a plurality of bolt insertion holes 8a facing in the front-rear direction. The bolt insertion holes 8a are connected to the cylinder block 5 as shown in FIG. In a state of being sandwiched between the front case member 7, a bolt shaft portion of a fixing bolt (not shown) for fastening the cylinder block 5 and the front case member 7 with a bolt and nut is inserted. Of these bolt insertion holes and fixing bolts, one that fastens the cylinder block 5 and the mount spacer 8 and one that fastens the mount spacer 8 and the front case member 7 may be provided.

  Further, mounting bracket mounting portions 8b are integrally formed on the left and right side surfaces of the mount spacer 8, respectively. These mounting bracket mounting portions 8b have a rectangular shape in side view, and bolt holes (not shown) are formed at the four corners of the vertical projecting surface. The base end 2a of the mount bracket 2 is integrally fastened and fixed to the mount bracket mounting portion 8b by fixing bolts 11 screwed into these bolt holes. And the upper part of the front cushion rubber 3 (refer FIG. 8) is fastened and fixed to the front-end | tip attachment part 2b of this mount bracket 2. As shown in FIG.

  In this embodiment, the mounting portion 8b for the mounting bracket is provided on the left and right side surfaces of the mounting spacer 8. However, the present invention is not limited to this. For example, it is provided on the lower left and right sides of the mounting spacer 8. You may do it. When mounting bracket mounting portions 8b are provided on the lower left and right sides of the mounting spacer 8, the shape of the mounting bracket 2 is also changed.

  Further, a notch portion (not shown) is formed at a position different from the mount bracket mounting portion 8b of the mount spacer 8, for example, above the mount bracket mounting portion 8b. The drive gear of the starter 9 for starting the engine is attached so as to be able to mesh with the ring gear 10 during cranking.

When the starter switch is turned on, the drive gear pushed out from the inside of the starter is engaged with the ring gear 10, the rotational force of the starter 9 is transmitted from the drive gear to the ring gear 10, and the engine 4 is rotated to start.
The starter 9 is not attached only to the upper side of the mount spacer above the mount bracket mounting portion 8b, but may be attached to the lower side of the mount spacer below the mount bracket mounting portion 8b.

According to such a configuration, when the mount bracket mounting position 8b is changed or newly installed, it is only necessary to remake the mount spacer 8. Therefore, it is not necessary to remake the cylinder block 5 or the front case member 7, thereby reducing the cost. Will be able to.
Further, the mount spacer 8 absorbs the difference in size, shape, and fixing bolt position between the cylinder block 5 and the front case member 7. As a result, the engine 4 is used not only for a specific transmission 6 (see FIG. 4) that can be joined to the engine 4, but also for other vehicle types that are not joined to the engine (FR vehicle). ) Transmission 6 (see FIG. 6), a differential integrated transmission used in FF vehicles, MR vehicles, and RR vehicles, so-called transaxle power unit 1 can be configured easily and at low cost. become.
Further, the power unit 1 can be configured by combining various types of engines for a specific transmission.
Furthermore, as shown in FIG. 7, by incorporating the front differential mechanism 8c into the mount spacer 8, the transmission 6 used in the FR vehicle can be converted into a transaxle, so that the FR vehicle can be easily and low-cost AWD. It becomes possible to become.

  In addition, the mount bracket mounting portion 8b can be provided at an optimum position while avoiding interference with the starter 9. Further, the degree of freedom of the mounting position of the starter 9 can be increased.

It is a perspective view of the connection member used for the engine mount structure of this embodiment. It is a perspective view of the connection member to which the starter was attached. It is a front view of a connection member. It is a side view of the vertically installed power unit which provided the connection member between the engine and the transmission for AWD vehicles. It is a top view of the connection member in FIG. 4, and the transmission for AWD vehicles. It is a side view of the vertically installed power unit in which a connecting member is interposed between the engine and the FR vehicle transmission. FIG. 5 is a side view of a vertically mounted power unit for an AWD vehicle with a connecting member incorporating a front differential function interposed between an engine and a FR vehicle transmission. It is the side view which showed the conventional engine mount structure. It is a perspective view of a mounting bracket and a front cushion rubber.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Power unit 2 ... Mount bracket 3 ... Front cushion rubber 4 ... Engine 5 ... Cylinder block 6 ... Transmission 7 ... Front side case member 8 ... Mount spacer (connection member)
8b ... Mount bracket mounting portion 9 ... Starter 10 ... Ring gear

Claims (1)

In an engine mount structure for a vehicle that is mounted on a vehicle body via a mount bracket that is fixed to the power unit and a front cushion rubber that is fixed to the mount bracket, a power unit that includes an engine and a transmission.
Between the engine cylinder block and the front case member of the transmission, the front surface is a joint surface joined to the engine cylinder block and the rear surface is a joint surface joined to the front case member of the transmission. Via a hollow connecting member, provided with a mounting portion for mounting bracket for fixing the mounting bracket to the connecting member ;
A ring gear is rotatably arranged inside the connecting member, and the ring gear is connected to the output shaft of the engine and the input shaft of the transmission, and at a position different from the mounting bracket mounting portion of the connecting member. An engine mount structure for a vehicle, wherein a starter for rotating the ring gear to start the engine is attached .

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