JP4454598B2 - Mount bracket mounting structure for transmission case - Google Patents

Description

  The present invention relates to a mounting bracket mounting structure for a transmission case, which includes a mounting bracket mounting portion on an outer wall of a transmission case formed by fixing at least two cases with bolts.

In the structure where the mounting bracket is attached to the outer wall of the transmission case that is formed by fixing multiple cases with bolts, a plurality of bosses (pedestal parts) protruding in a columnar shape are provided on the outer wall of the transmission case. There is one in which a mounting bracket is placed on each seating surface and fixed with bolts (for example, see Patent Document 1).
JP 2004-98800 A

  However, in the above-described conventional configuration, the mount bracket is fixed by the pedestal portion that protrudes apart from the outer wall of the transmission case. Therefore, when the input to the pedestal portion is relatively large, it is necessary to increase the strength of the pedestal portion. .

  In particular, in the vicinity of the mating surface between the cases, the input to the mounting bracket that connects the vehicle body and the transmission case with a slight deviation between the cases, that is, the pedestal portion to which the mounting bracket is fixed is relatively large. It is possible to become.

  A problem to be solved by the present invention is to provide a mounting bracket mounting structure for a transmission case that can provide sufficient strength to fix the mounting bracket even when the mounting bracket is fixed near the mating surface of the case forming the transmission case. There is to do.

The present invention has at least two cases, the flange portions provided on the cases are aligned with each other, and a bolted portion between the combined flange portions is fixed with a bolt to form a transmission case, and the outer wall of the transmission case And a mounting bracket mounting structure for a transmission case provided with a mounting portion for the mounting bracket, the mounting portion having a seating surface with which the mounting bracket abuts and a plurality of bolt mounting holes on the seating surface. A boss seat portion and a wall portion connecting the boss seat portions adjacent to each other, and mounting of bolts formed on the flange portion between at least one of the wall portions and the flange portion. extends integrally toward a boss portion on a rear surface of the wall portion, Rutotomoni bolts are integrally connected to the wall portion is passed through the inside, it provided a cylindrical reinforcement part It is characterized by.

  In the present invention, the boss seat portion is disposed at a position adjacent to the flange portion and at one position different from the flange portion, and the reinforcing portion is disposed at a position different from the flange portion. Can be connected to the side. In the present invention, the boss seat portion is disposed at a position adjacent to the flange portion and at least two positions different from the flange portion, and the reinforcing portion is farthest from the position adjacent to the flange portion. The wall portion connected to the boss seat portion can be connected to the boss seat portion side.

  In the present invention, the wall portion may be provided with at least one pedestal portion having a seating surface with which the mount bracket abuts between the boss portions. In this case, the boss portion is disposed at a position adjacent to the flange portion and at one position different from the flange portion, and the pedestal portion is disposed at the bent portion by bending the wall portion. Can do.

  Furthermore, in the present invention, the wall portion may be provided with at least one pedestal portion having a seat surface with which the mount bracket abuts between the boss seat portions. In this case, the boss seat portion is disposed at a position adjacent to the flange portion and at one position different from the flange portion, and the pedestal portion is disposed at the bent portion by bending the wall portion. be able to.

  In the present invention, the top surface of the wall portion may be a seat surface against which the mount bracket abuts.

  In the present invention, since the plurality of boss seats for fixing the mount bracket are connected to each other by the wall, the rigidity of each boss seat can be increased as a whole fixed portion.

Further, the present invention extends integrally between at least one of these wall portions and a flange portion provided in a case that is joined to each other from the flange portion toward the back surface of the wall portion, Rutotomoni bolts are integrally connected is passed through the inside, also by providing the cylindrical reinforcement part, it is possible to increase the rigidity of the individual boss seat as a whole a fixed portion.

  In addition, the reinforcing portion is formed on the flange portion, and is formed by extending a mounting boss portion of a bolt that fixes the flange portions matched to each other. It can also serve as a reinforcement for the wall part.

  Therefore, according to the present invention, even when the mounting bracket is fixed near the flange portion that becomes the mating surface of the case that forms the transmission case, the mounting bracket is not affected by a slight shift between the cases, and is simple. A sufficient strength can be ensured by the configuration.

  Hereinafter, a mounting bracket mounting structure for a transmission case according to the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a schematic diagram showing a front case (front of the vehicle) of a transmission case for a front-wheel drive (FF) vehicle that employs one embodiment of a mounting bracket mounting structure for a transmission case according to the present invention. FIG. 2 is a schematic view showing the transmission case from the upper surface (above the vehicle).

  The transmission case 100 includes a side cover 110, a transmission cover 120, and a converter cover 130, and has an oil pan 140 at a lower portion thereof. The converter cover 130 has a partition on the inner side thereof, and houses the torque converter on the front side of the partition. The transmission cover 120 also has a partition on the inside thereof, and the forward / reverse switching mechanism and the differential mechanism are housed in a space formed between the rear surface of the converter cover 130 and the front surface of the transmission cover 120. Side cover 110 opens on the mating surface side with transmission cover 120, and houses a belt-type continuously variable transmission mechanism in a space formed between the inner surface of side cover 110 and the rear surface side of partition wall of transmission cover 120.

  FIG. 3 is a perspective view showing an assembled state when the side cover 110 and the transmission cover 120 are combined and a mounting bracket 20 described later is fixed with a bolt B1.

  The side cover 110 integrally has a flange portion 111, and a plurality of boss portions 112 are formed along the flange portion 111 on the side surface of the flange portion 111 facing the mating surface, as shown in FIGS. It is provided integrally. A mounting hole (through hole) A1 for the bolt B2 is formed in the boss portion 112 to form a mounting boss portion.

  The transmission cover 120 also has a flange portion 121 that is integrated with the flange portion 111, and the flange portion 121 has a bolt B2 at a position corresponding to the through hole A1 of the side cover 110, as shown in FIGS. A female screw portion A2 into which is screwed is formed.

  Thus, the flanges 111 and 121 are fixed to each other by bolts B2 by screwing the bolts B2 inserted from the through holes A1 of the mounting bosses 112 into the female screw portions A2 of the transmission cover 120. That is, the side cover 110 and the transmission cover 120 are integrally fixed by the bolt B2.

  Similarly, the converter cover 130 has a flange portion 131 integrally, and a plurality of bosses along the flange portion 131 are formed on the side surface of the flange portion 131 that faces the mating surface, as shown in FIGS. The part 132 is provided integrally. The boss portion 132 is also formed with a through-hole A1 for the bolt B2 to form a mounting boss portion.

  The transmission cover 120 also has a flange portion 123 that is integrated with the flange portion 131, and the flange portion 123 has a bolt B2 at a position corresponding to the through hole A1 of the converter cover 130 as shown in FIGS. A female screw portion A2 into which is screwed is formed.

  Accordingly, the flanges 123 and 131 are fixed to each other by the bolts B2 by screwing the bolts B2 inserted from the through holes A1 of the boss portions 132 into the female screw portions A2 of the transmission cover 120. That is, the transmission cover 120 and the converter cover 130 are integrally fixed by the bolt B2.

  Reference numerals 1a and 1b are boss seats integrally raised from the outer wall 113 of the side cover 110, and have a seat surface 2 with which the mount bracket 20 abuts. The boss seat portion 1a is disposed at a position integrally connected to the flange portion 111, and a mounting hole (female screw hole) 3 for a bolt B1 for fixing the mount bracket 20 is formed on the seat surface 2. The boss seat portion 1b is disposed at a position spaced from the boss seat portion 1a along the flange portion 111, and a female screw hole 3 for screwing the bolt B1 is also formed on the seat surface 2.

  In FIG. 1, reference numeral 4 denotes a substantially L-shaped wall portion that protrudes integrally from the outer wall 113 of the side cover 110 and connects the boss seat portion 1a and the boss seat portion 1b. This wall portion 4 has a bent portion 41, a wall portion 42 extended from the bent portion 41 is integrally connected to the boss seat portion 1a, and a wall portion 43 extended from the bent portion 41 is a boss seat portion 1b. Connected to one.

  Further, the bent portion 41 constitutes a pedestal portion having the seat surface 2 with which the mount bracket 20 abuts. In this case, the mount bracket 20 can be held in a stable state even when there is no other boss portion between the boss portion 1a and the boss portion 1b.

  Reference numeral 5 is integrally connected from the outer wall 113 of the side cover 110, and the mounting boss portion 112 formed on the flange portion 111 extends integrally toward the back surface 43b of the wall portion 43 and is integrally connected to the wall portion 43. This is a cylindrical reinforcing boss portion (reinforcing portion). The reinforcing boss portion 5 is integrally connected to the back surface 43b of the wall portion 43, and the tip 5e penetrates the wall portion 43. Thus, the bolt B2 is screwed between the flange portions 111 and 121 through the inside of the reinforcing boss 5. The wall portion 5 may be integrally connected to the back surface 43b without protruding through the wall portion 43.

  Reference numeral 6 denotes a wall portion that integrally protrudes from the outer wall 113 of the side cover 110 and connects the boss seat portion 1b and the flange portion 111, but in this embodiment, the flange portion 111 and the wall portion 6 are Both are partially cut away.

  The mount bracket 20 has a main body portion 21 that fits to each of the boss seat portions 1a and 1b and the seating surface 2 of the pedestal portion 41, and this main body portion 21 is aligned with the female screw holes 3 formed in the pedestal portions 1a and 1b. As shown in FIG. 3, each position is provided with a boss 21a in which a through hole A3 of the bolt B1 is formed. Thus, the main body portion 21 of the mount bracket 20 is connected to the boss seat portions 1a, 1b by connecting the bolts B1 to the boss seat portions 1a, 1b connected to the outer wall 113 by the wall portions 42, 43. It is fixedly held by a pedestal portion 41 disposed between the boss seat portions 1a and 1b.

  Note that the pedestal portion 41 of this embodiment is merely abutting against the mount bracket 20 to support the mount bracket 20, but, like the boss seat portions 1a and 1b, the female screw hole 3 opening in the seat surface 2 is provided. It may be used to form and fix the main body 21 of the mount bracket 20.

  The mount bracket 20 also has an arm portion 22 that is integrally connected to the main body portion 21 and extends along the outer wall 114 of the side cover 110 located on the left side of the vehicle. The arm portion 22 is formed on the outer wall 114. A boss 22a in which a through hole A3 of the bolt B1 is formed is provided at a position aligned with the seat surface 115 and aligned with the female screw hole 3 formed in the seat surface 115. Thus, the arm portion 22 of the mount bracket 20 is fixed to the outer wall 114 by connecting the bolt B1 to the female screw hole 3 formed in the seating surface 115 of the outer wall 114.

  The mount bracket 20 has a vehicle body attachment portion 23 integrally connected to the main body portion 21 and the arm portion 22 and fixed to the vehicle body member Mb at the upper portion thereof. The vehicle body attachment portion 23 has an attachment hole 23a, and is directly connected to the vehicle body member Mb via a bolt (not shown) or fixed to the vehicle body member Mb via a mount member (not shown). Has been.

  As described above, in the present embodiment, the plurality of boss seats 1a, 1b with which the mount bracket 20 abuts are connected to each other by the wall 4, so that each boss seat 1a, 1b is connected to the entire fixed part. As the rigidity can be increased.

  Further, in this embodiment, the wall portion 43 and the flange portion 111 are integrally extended from the flange portion 111 toward the back surface 43b of the wall portion 43, and are integrally connected to the wall portion 43. The provision of the reinforcing boss portion 5 can also increase the rigidity of the individual boss seat portions 1a and 1b as one whole fixed portion.

  In addition, the reinforcing boss 5 is formed on the flange portion 111 and is formed by extending the mounting boss portion 112 of the bolt B1 that fixes the flange portions 111 and 121 to each other, so that the individual boss seat portions 1a and 1b are fixed to one. It can also serve as reinforcement for the wall portion 4 as a whole portion.

  Therefore, according to the present embodiment, the side case 110 and the transmission case 120 are fixed to each other even when the mount bracket 20 is fixed in the vicinity of the flange portions 111 and 121 that become the mating surfaces of the side case 110 and the transmission case 120 forming the transmission case 100. Sufficient strength can be ensured with a simple configuration without being affected by slight deviations.

  In the present embodiment, the flange portion 111 and the wall portion 6 are partially cut away. In such a configuration, the volume of the material used can be reduced and the weight of the side cover 110 can be reduced, but the boss portion 1b may be subjected to stress concentration.

  Therefore, in this embodiment, as shown in FIG. 4, the reinforcing boss portion 5 is connected to the boss seat portion 1b side from the center Lo with respect to its length L, and most preferably, it is integrally formed at a position adjacent to the boss seat portion 1b. Connect to. In this case, since the reinforcing boss part 5 serves as the wall part 6, as a result, volume reduction and weight reduction can be achieved without lowering rigidity.

  FIG. 5 is a perspective view of a principal part showing a fixing portion of the mount bracket 20 according to the second embodiment of the present invention. In the present embodiment, the same parts as those in the first embodiment are denoted by the same reference numerals and the description thereof is omitted.

  In this embodiment, the top surfaces 42f and 43f of the wall portions 42 and 43 and the top surface 6f of the wall portion 6 are aligned with the boss seat portions 1a and 1b and the seat surface 2 of the bent portion 41. In this case, the seat surface for holding the mount bracket 20 is a uniform plane by the seat surface 2, so that the mount bracket 20 can be stably held. In the present embodiment, the seat surface 2 is configured to be higher than the top surface 111f of the flange portion 111. This is the same height as the top surface 111f of the flange portion 111 or the boss. When the seat portion 1a is separated from the flange portion 111, the position may be lower than the top surface 111f of the flange portion 111.

  In addition, since the present embodiment includes the wall portion 6 that connects the boss seat portion 1b and the flange portion 111 to each other, the rigidity of the individual boss seat portions 1a and 1b as a whole fixed portion is further increased. Can be increased.

  The above description shows preferred embodiments of the present invention, but various modifications can be made within the scope of the claims. For example, the attachment structure according to the present invention is provided on the side cover 110, but may be provided on the transmission cover 120 or the converter cover 130. Further, the mounting structure according to the present invention is not limited to the transmission case for FF vehicles, but may be adopted for the transmission case for FR vehicles.

  Further, in this embodiment, the boss seats 1a and 1b are disposed at a position adjacent to the flange portion 111 and at one position different from the flange portion 111, and the wall portion 4 is bent so that the bent portion 41 is formed. The boss seat portion 1b and the pedestal portion 41 are disposed in parallel along the flange portion 111, but the boss seat portion or the pedestal portion disposed in parallel along the flange portion 111 is arranged as the pedestal portion 41. Each can be provided at two or more locations. That is, the boss seat according to the present invention can be provided in at least three or more locations of the outer wall 113 of the side cover 110, and the shape of the outer wall 113 connecting the boss seats to each other and the pedestal on the outer wall 113 The number and layout of the parts can be appropriately changed according to the form of the bracket 20.

  Each element in the above-described form, and the arrangement and number of elements can be appropriately combined depending on the application.

  The present invention can be applied to a transmission case employed in all vehicles such as passenger cars and special work vehicles.

1 is a schematic view showing a transmission case for an FF vehicle adopting an embodiment of a mounting bracket mounting structure for a transmission case according to the present invention from the front of the vehicle. It is a schematic diagram which shows the transmission case based on the form from the vehicle upper direction. In the same form, it is a perspective view which shows the assembly | attachment state at the time of matching a side cover and a mission cover and fixing a mount bracket with a volt | bolt. It is a principal part perspective view which shows the fixed part of the mount bracket concerning the form. FIG. 6 is a perspective view of a main part showing a fixing portion of the mount bracket according to the second embodiment of the present invention.

Explanation of symbols

1a, 1b Boss seat 2 Seat surface 3 Female thread hole
4 ~ 6 Wall part 7 Reinforcement boss part (reinforcement part)
20 Mounting bracket
100 transmission case
110 Side cover
111 Flange
B1, B2 bolt

Claims (6)

Having at least two cases, the flange portions provided on the case are aligned with each other, and the flange portions that are combined are fixed with bolts to form a transmission case, and a mounting bracket is formed on the outer wall of the transmission case. A mounting bracket mounting structure for a transmission case that is provided with a mounting portion of
The mounting portion includes a plurality of boss seat portions having a seat surface with which the mount bracket abuts and a bolt mounting hole formed on the seat surface, and a wall portion connecting the boss seat portions adjacent to each other. And
Between at least one of the wall portions and the flange portion, it extends integrally from a mounting boss portion of a bolt formed on the flange portion toward the back surface of the wall portion, and is integrally connected to the wall portion. A mounting bracket mounting structure for a transmission case , comprising a cylindrical reinforcing portion through which a bolt is passed .   The boss seat portion is disposed at a position adjacent to the flange portion and at one position different from the flange portion, and the reinforcing portion is connected to the boss seat portion side disposed at a position different from the flange portion. The mounting bracket mounting structure for a transmission case according to claim 1.   The boss seat part is arranged at a position adjacent to the flange part and at least two positions different from the flange part, and the reinforcing part is connected to the boss seat part farthest from the position adjacent to the flange part. The mounting bracket mounting structure for a transmission case according to claim 1, wherein the wall portion is connected to the boss seat side.   The mount bracket mounting structure for a transmission case according to claim 1 or 2, wherein the wall portion includes at least one pedestal portion having a seat surface with which the mount bracket abuts between the boss seat portions.   The boss seat portion is disposed at a position adjacent to the flange portion and at one position different from the flange portion, and the pedestal portion is disposed at the bent portion by bending the wall portion. 4. A mounting bracket mounting structure for a transmission case according to 4.   The mount bracket mounting structure for a transmission case according to any one of claims 1 to 5, wherein a top surface of the wall portion is a seat surface with which the mount bracket abuts.

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