JP6292271B1 - Engine end plate peripheral structure - Google Patents

Abstract

To reduce a sound leaking from a gap between an engine and an end plate with a simple configuration. A lower end central portion 22 corresponding to a rear end portion of a lower fastening surface 11 fastened to a front end surface 41a of a transmission case 41 in a rear end portion of an engine body 2 is more than a rear fastening surface 11. A projecting portion 29 projecting rearward is formed, and the rear side fastening surface 11 is formed in a region excluding the projecting portion 29 in the outer peripheral portion of the rear end portion of the engine body 2, and the lower side of the opening edge 51a of the end plate 5 In addition, a concave portion 52 that is recessed downward is formed so as to surround the protruding portion, and a seal member 6 that closes a gap between the concave portion 52 and the lower surface of the protruding portion 29 is fixed to the concave portion 52. [Selection] Figure 14

Description

  The present invention relates to an engine body, a transmission case disposed behind the engine body and fastened to a rear side fastening surface formed at a rear end portion of the engine body, and a lower end of the engine body disposed below the engine body. An oil pan that is fastened to a lower fastening surface formed in the part, and an end that has an opening in the center and is disposed between the front end surface of the transmission case and the rear fastening surface in contact with them The present invention relates to a peripheral structure of an end plate in an engine including a plate.

  2. Description of the Related Art Conventionally, an engine having an engine body and a transmission coupled thereto is configured such that a transmission mission case and the engine body are fastened.

  In addition, as disclosed in Patent Document 1, in the engine configured as described above, a plate-like end plate for closing a portion of the opening portion of the transmission case that protrudes outward from the outer peripheral edge of the engine body, It is disposed between the engine body and the transmission case.

  However, in the engine of Patent Document 1, the end plate does not block all the portion of the opening of the transmission case that protrudes outward from the outer peripheral edge of the engine body, and the oil pan covers part of the opening of the transmission case. It is configured to cover from the outside.

  Specifically, in Patent Document 1, the lower side portion of the opening edge of the end plate is located below the lower end portion of the engine body (the lower end portion of the portion that is fastened to the transmission case of the engine body). A clearance communicating with the inside of the mission case is defined between the lower end portion of the main body and the lower side portion of the opening edge of the end plate. Further, a rear end wall that extends in the vertical direction and faces the gap is provided at an end of the oil pan on the mission case side, and a slope wall that surrounds the rear end wall. The oil pan is fastened to the engine body and fastened to the transmission case with the lower end of the end plate sandwiched between the end of the slope wall on the transmission case side. The gap is closed by the rear end wall.

Japanese Utility Model Publication No. 7-21881

  In the structure of Patent Document 1, since the oil pan must be fastened to the transmission case in addition to the engine body, the structure becomes complicated, and the oil pan closes a part of the opening of the transmission case. Noise leaking from the gap between the plate and the engine body may collide with the outer surface of the oil pan and increase noise.

  The present invention has been made in view of the circumstances as described above, and provides an end plate structure capable of reducing sound leaking from a gap between the engine and the end plate with a simple configuration. Objective.

  In order to solve the above-described problems, the present invention provides an engine body, a transmission case disposed behind the engine body and fastened to a rear fastening surface formed at a rear end portion of the engine body, and a lower part of the engine body. And an oil pan fastened to a lower fastening surface formed at the lower end of the engine body, and an opening in the center between the front end surface of the transmission case and the rear fastening surface. An end plate peripheral structure in an engine provided with an end plate arranged in contact with the engine, wherein the engine main body has a lower end central portion corresponding to a rear end portion of the lower fastening surface among rear end portions, The rear fastening surface has a protruding portion that protrudes rearward from the rear fastening surface, and the rear fastening surface is formed in a region excluding the protruding portion of the outer peripheral portion of the rear end portion of the engine body, A concave portion that is recessed downward is formed on the lower side of the opening edge of the end plate so as to surround the protruding portion, and a sealing member that closes a gap between the concave portion and the lower surface of the protruding portion is formed in the concave portion. An engine end plate peripheral structure characterized by being fixed is provided.

  According to this configuration, the lower end central portion of the rear end portion of the engine body corresponding to the rear end portion of the lower fastening surface to which the oil pan is fastened is caused to protrude rearward from the rear fastening surface to which the transmission case is fastened. Thus, the weight of the engine body can be kept small while securing the fastening force between the oil pan and the engine body with a simple configuration of forming the protruding portion. Moreover, by providing the end plate with the concave portion and the seal member, the gap between the lower surface of the protruding portion and the concave portion can be appropriately closed, and the sound leaking from the inside of the transmission case can be reduced.

  Specifically, by forming the protruding portion, without shifting the position of the entire rear fastening surface to the rear side (while shortening the length of the engine body other than the protruding portion in the front-rear direction), The length of the rear end portion of the lower fastening surface in the front-rear direction and the rigidity thereof can be ensured. Therefore, the weight of the engine body can be reduced while securing the fastening force between the oil pan and the rear end portion (rear end portion of the lower fastening surface) of the engine body. Then, by providing the end plate with a concave portion corresponding to the protruding portion, the end plate can be retracted into the concave portion while forming the protruding portion, and the end plate can be brought into contact with the rear fastening surface.

  However, when the recess is provided in the end plate in this way, a gap is formed between the protruding portion and the recess, and sound in the mission case or the like may leak from the gap.

  On the other hand, in this invention, the sealing member which plugs up the clearance gap between the lower surface of a protrusion part and a recessed part is being fixed to the recessed part. Therefore, it is possible to suppress noise while obtaining the effect of securing the fastening force between the oil pan and the engine body while reducing the weight of the engine body.

  In the above configuration, it is preferable that the rear end portion of the oil pan extends to below the protruding portion, and the seal member closes a gap between the recess and the lower surface of the rear end portion of the oil pan ( Claim 2).

  In this way, sound is leaked to the outside through the gap between the bottom surface of the rear end portion of the oil pan and the recess while increasing the rigidity of the rear end portion of the oil pan by increasing the length in the front-rear direction. Can be suppressed.

  In the above-described configuration, a folded portion that is folded downward is formed at the rear edge of the rear end portion of the oil pan, and the folded portion is formed only at the central portion of the rear edge of the rear end portion of the oil pan. It is preferable that the portion of the recess facing the folded portion is recessed below the other portion of the recess (Claim 3).

  If it does in this way, interference with a folding | returning part and an end plate can be suppressed, improving the rigidity of the rear-end part of an oil pan by formation of a folding | returning part. In addition, the vertical separation distance between the end portion of the rear end portion of the oil pan where the folded portion is not formed and the end plate can be shortened, and sound leakage from the gap between them can be more reliably performed. Can be suppressed.

  In the above configuration, the projecting portion has a shape extending in the width direction of the engine body, and the seal member includes a seal body portion extending in the width direction of the engine body along the lower surface of the projecting portion, and the seal. Extending from the both ends of the main body in the width direction of the engine main body and extending upward along both edges in the width direction of the engine main body of the projecting portion, and each of the extended portions includes the end plate And the engine body are preferably sandwiched between the engine body and the engine body.

  In this way, it is possible to suppress noise from leaking outside through the gap between the both ends of the engine body in the width direction of the projecting portion and the concave portion, and to reduce noise, and the seal member can be used as an end plate. And the engine body can be appropriately supported to prevent the seal member from falling off.

  As described above, according to the structure around the end plate of the engine of the present invention, it is possible to reduce the sound leaking from the gap between the engine and the end plate with a simple configuration.

1 is a schematic perspective view of an engine to which an engine end plate peripheral structure according to an embodiment of the present invention is applied. It is a schematic rear view of an engine. It is the schematic which looked at the rear part of the lower block from the downward direction. It is the schematic of the state by which the oil pan was fixed to the lower block. It is a schematic rear view of the state which removed the transmission from the state shown in FIG. It is the figure which expanded a part of cutting | disconnection end elevation when an engine is cut | disconnected by the surface which passes the VI-VI line of FIG. It is a rear view of an end plate. It is a rear view of a seal member. It is a schematic top view of a sealing member. It is the figure which showed the state by which the sealing member was fixed to the end plate. FIG. 11 is a cut end view taken along line XI-XI in FIG. 10. FIG. 11 is a cut end view taken along line XII-XII in FIG. 10. FIG. 11 is a cut end view when the engine is cut along a plane passing through a line XI-XI in FIG. 10. FIG. 11 is a cut end view when the engine is cut along a plane passing through a line XII-XII in FIG. 10. FIG. 11 is a cut end view when the engine is cut along a plane passing through line XV-XV in FIG. 10. It is the figure which showed the sealing member which concerns on other embodiment.

  FIG. 1 is a schematic perspective view showing an engine 1 to which an engine end plate peripheral structure according to an embodiment of the present invention is applied. As shown in FIG. 1, in the engine 1, the engine 1 and the transmission 4 are arranged side by side. The engine 1 is provided in a vehicle, for example.

  As shown in FIG. 1, in the present embodiment, four cylinders 2a are formed in a line in the engine body 2, and the engine 1 and the transmission 4 are arranged in the arrangement direction of the cylinders 2a. In this specification, the arrangement direction of the engine 1 and the transmission 4 in this cylinder arrangement direction is referred to as the front-rear direction, and the engine 1 side is described as the front and the transmission 4 side is described as the rear. In the following, the vertical direction in FIG. 1 is simply referred to as the vertical direction, and the width direction of the engine body 2 and the direction orthogonal to the front-rear direction and the vertical direction is referred to as the horizontal direction.

  The engine 1 includes an engine body 2 that includes a cylinder block 3 and a cylinder head that are configured by an upper block 10 and a lower block 20, and an oil pan 30 that is disposed below and fixed to the lower block 20. ing. However, in FIG. 1 etc., only the cylinder block 3 and the oil pan 30 of the engine 1 are shown, and illustration of other parts, such as a cylinder head, is abbreviate | omitted.

  FIG. 2 is a schematic rear view of the engine 1. FIG. 3 is a schematic view of the rear part of the lower block 20 as viewed from below.

  As shown in FIG. 2, a rear fastening surface 11 that extends along the same plane and is fastened to the front end surface 41 a of the transmission case 41 of the transmission 4 is formed at the rear end of the cylinder block 3.

  Of the lower end portion of the lower end portion of the lower block 20, the portion 22 located in the center in the left-right direction, that is, the lower end central portion 22 of the rear end portion of the lower block 20 protrudes rearward from the rear side fastening surface 11. A protruding portion 29 that protrudes rearward from the rear fastening surface 11 is formed in the portion.

  The rear fastening surface 11 is provided in a portion excluding the protruding portion 29 in the outer peripheral portion of the cylinder block 3.

  Specifically, the rear side fastening surface 11 includes a portion extending along the upper edge and the left and right edges of the upper block 10 and a portion extending along the lower edge and the left and right edges of the lower block 20. . As described above, the rear fastening surface 11 is provided in a portion excluding the protruding portion 29 and in a portion excluding the central portion in the left-right direction in the lower end portion of the rear end portion of the lower block 20. The portion of the rear fastening surface 11 along the lower edge of the lower block 20 extends from the protruding portion 29 to the left and right outer sides.

  A plurality of bolt holes 11 d are formed in the rear side fastening surface 11. A common bolt is inserted and screwed into these bolt holes 11d and a bolt hole formed in the front end surface of the transmission case 41, so that the cylinder block 3 and the transmission case 41, and thus the engine 1 and the transmission 4 Is concluded. Specifically, the cylinder block 3 and the transmission case 41 are fastened with an end plate 5 described later interposed therebetween.

  The oil pan 30 is fixed to the lower block 20.

  FIG. 4 is a view corresponding to FIG. 3, and is a schematic view showing a state where the oil pan 30 is fixed to the lower block 20.

  As shown in FIG. 4, a fastening flange 31 extending outward is provided on the upper edge of the oil pan 30. The fastening flange 31 is provided over the entire circumference of the upper edge of the oil pan 30. The fastening flange 31 is formed with bolt holes (hereinafter referred to as oil pan side bolt holes) 31a penetrating the fastening flange 31 in the vertical direction at a plurality of positions in the circumferential direction.

  As shown in FIG. 3, a lower fastening surface 21 extending along the same plane is formed at the lower end of the lower block 20. The lower fastening surface 21 has a shape corresponding to the fastening flange 31. Specifically, the lower fastening surface 21 extends along the outer periphery of the lower end portion of the lower block 20, and the center portion thereof is open in the vertical direction.

  The lower fastening surface 21 is formed with bolt holes (hereinafter referred to as block-side bolt holes) 21a penetrating in the vertical direction at a plurality of positions in the circumferential direction.

  The oil pan 30 is formed by screwing a common bolt into the oil pan side bolt hole 31a and the block side bolt hole 21a in a state where the upper surface of the fastening flange 31 is in contact with the lower fastening surface 21. Fixed to the lower block 20.

  As shown in FIG. 4, two oil pan side bolt holes 31a are formed in the rear end portion 32 of the fastening flange 31, and the rear end portion 32 of the fastening flange 31 is connected to the lower block 20 by bolts. It is concluded.

  Of the rear end portion 32 of the fastening flange 31, a folded portion 32f folded downward is provided at the rear edge of the left and right central portion 32a. On the other hand, the flange portions are not formed on the left and right side portions 32b and 32b of the rear end portion 32 of the fastening flange 31, and the left and right side portions 32b and 32b of the rear end portion 32 of the fastening flange 31 are not formed. It is comprised only by the part extended along the lower side fastening surface 21. FIG. In the rear end portion 32 of the fastening flange 31, the oil pan side bolt hole 31 a is formed only in the left and right center portion 32 a provided with the folded portion 32 f, and the bolt hole of the rear end portion 32 of the fastening flange 31 is formed. The rigidity of the portion where 31a is formed is particularly enhanced. In the present embodiment, the left and right side portions of the rear end portion 32 of the fastening flange 31 each have a shape that bulges rearward at the left and right centers.

  The rear end portion 32 of the fastening flange 31 is fastened to the rear end portion of the lower fastening surface 21. The rear end portion of the lower fastening surface 21 is a portion provided with a protruding portion 29, and the rear end portion 32 of the fastening flange 31 is fastened to the lower end central portion 22 of the rear end portion of the lower block 20.

  Here, in the present embodiment, as shown in FIG. 4, the rear end portion 32 of the fastening flange 31 is located rearward to a position below the protruding portion 29, that is, a position behind the rear fastening surface 11. The rear end portion 32 of the fastening flange 31 is in contact with the lower surface of the protruding portion 29 from below.

  Next, the end plate 5 and the seal member 6 fixed to the end plate 5 will be described.

  FIG. 5 is a schematic rear view of the state where the transmission 4 is removed from the state shown in FIG. 1, and shows a state where the end plate 5 to which the seal member 6 is fixed is attached to the engine 1. FIG. 6 is an enlarged view of a part of the cut end view when the engine is cut along a plane passing through the line VI-VI shown in FIG. 5. FIG. 7 is a rear view of the end plate 5.

  The end plate 5 is a member that is disposed between the cylinder block 3 and the transmission case 41 and covers a portion of the opening portion at the front end of the transmission case 41 that protrudes outward from the cylinder block 3. The end plate 5 has a substantially plate shape, and extends outward from the outer peripheral edge of the cylinder block 3, and the outer peripheral edge extends along the outer peripheral edge of the front end surface of the transmission case 41.

  As shown in FIG. 6, the end plate 5 has a flat front surface 5a and a rear surface 5b, and is disposed between the cylinder block 3 and the transmission case 41 from the rear side against the rear fastening surface 11. In contact with the front end surface 41a of the mission case 41 from the front.

  As shown in FIG. 5 and the like, an opening 51 is formed in the center of the end plate 5. In the present embodiment, the opening edge 51 a (hereinafter sometimes simply referred to as an opening edge) of the opening 51 of the end plate 5 extends along the inner peripheral edge of the rear fastening surface 11.

  A plurality of mounting holes 50 a penetrating the front and back are formed in the outer peripheral portion of the end plate 5. The end plate 5 is disposed between the cylinder block 3 and the transmission case 41 in a state where a crankshaft (not shown) is inserted into the opening 51, and the cylinder block 3 is connected to the cylinder block 3 by a bolt inserted into each mounting hole 50a. And the transmission case 41 are fastened together.

  As shown in FIG. 7, a recess 52 that is recessed downward is formed on the lower side of the opening edge 51 a of the end plate 5. As shown in FIG. 5, the concave portion 52 is provided at a position corresponding to the protruding portion 29, and in a state where the end plate 5 is sandwiched between the cylinder block 3 and the transmission case 41, the protruding portion 29 is It has a surrounding shape, that is, a shape in which the protruding portion 29 is inserted inside.

  Here, as described above, the rear end portion 32 of the fastening flange 31 is in contact with the lower surface of the protruding portion 29 from below, and the concave portion 52 is located behind the rear end portion 32 of the fastening flange 31 together with the protruding portion 29. Enclose the edge.

  In the present embodiment, a retreating portion 55 that is further recessed downward is provided at a portion of the concave portion 52 that is a central portion in the left-right direction and that opposes the portion of the rear end portion 32 of the fastening flange 31 that has the folded portion 32f. Thus, interference between the folded portion 32f and the end plate 5 is avoided.

  As shown in FIG. 5, in this embodiment, the protrusion part 29 has a substantially rectangular parallelepiped shape extended in the left-right direction. Correspondingly, as shown in FIG. 7, the recess 52 is recessed in a substantially U-shape, and the inner peripheral edge of the recess 52 includes a lower edge portion 52 a extending left and right along the lower surface of the protruding portion 29, and It is comprised by the side edge part 52b extended up and down along the left-right both sides | surfaces of the protrusion part 29. As shown in FIG. A step portion is formed in the lower edge portion 52a such that the left and right central portions are lower than the left and right side portions.

  In this embodiment, the lower end part of each side edge part 52b of the recessed part 52 is notched to the left-right outer side, and the notch part 59 is formed in this part.

  A portion of the end plate 5 that surrounds the recess 52 is formed with a seal member support portion 54 that bulges backward. Specifically, the seal member support portion 54 includes a first support portion 54a extending in the left-right direction along the lower edge portion 52a of the recess 52, and a second support located above both left and right end portions of the first support portion 54a. Part 54b. The notch 59 is formed between the second support 54b and the first support 54a, and extends slightly outward from the seal member support 54.

  The seal member 6 is fixed to the seal member support portion 54.

  FIG. 8 is a rear view of the seal member 6. FIG. 9 is a schematic top view of the seal member 6. FIG. 10 is a view showing a state in which the seal member 6 is fixed to the end plate 5. 11 and 12 are cut end views taken along lines XI-XI and XII-XII in FIG. 10, respectively. 13, FIG. 14 and FIG. 15 show the engines (engines in which the engine plate 5 is sandwiched between the cylinder block 3 and the transmission case 41), respectively, along the lines XI-XI, XII-XII and XV-XV in FIG. It is a cut end view when cut along a plane passing through each line.

  As shown in FIG. 8 and the like, the seal member 6 includes a substantially rectangular seal main body portion 61 extending in the left-right direction, an extending portion 65 extending upward from both left and right end portions of the seal main body portion 61, and a seal main body portion 61. And a notch lip portion 67 extending from the left and right edges to the left and right sides. The seal member 6 is formed of a material that is relatively easy to deform, and is made of, for example, rubber.

  The seal body 61 includes a supported portion 62 that forms a lower portion thereof, and a main lip portion 63 that extends upward from the upper edge of the supported portion 62. As shown in FIG. 11 and the like, the main lip portion 63 is thinner than the supported portion 62 and extends upward from the front portion of the supported portion 62. In this embodiment, the left and right central portions of the upper edge of the supported portion 62 and the upper edge of the main lip portion 63 are recessed downward.

  As shown in FIG. 9 and the like, the left and right outer edges of each extending portion 65 are provided with protruding portions 65a that protrude rearward over the entire vertical direction.

  As shown in FIG. 10, the seal member 6 is fixed to the end plate 5 by the supported portion 62 being disposed in front of the seal member support portion 54 and being fixed thereto. In the present embodiment, the supported portion 62 is fixed to the front surface of the first support portion 54a of the seal member support portion 54 with a double-sided tape.

  In a state where the seal member 6 is fixed to the end plate 5 (hereinafter referred to as a fixed state as appropriate), the supported portion 62 is slightly above the upper edge of the first support portion 54a, that is, the lower edge portion 52a of the recess 52. Arranged to protrude. The upper edges of the supported portion 62 and the main lip portion 63 are substantially parallel to the lower edge portion 52a of the concave portion 52, and the concave portion at the left and right central portion thereof is disposed at a position facing the retracting portion 55 of the concave portion 52. The

  Further, as shown in FIG. 10, in the fixed state, a part of each extending portion 65 is disposed so as to protrude from the second support portion 54b to the left and right inner sides.

  Further, as shown in FIG. 10, in the fixed state, each notch lip portion 67 is disposed at a position facing each notch portion 59 of the end plate 5.

  The seal member 6 configured in this manner closes the gap between the recess 52 and the lower surface of the protruding portion 29 in a state where the end plate 5 is sandwiched between the cylinder block 3 and the transmission case 41.

  Specifically, as shown in FIG. 13, the left and right outer portions of the main lip portion 63 abut against the lower surface of the rear end portion 32 of the fastening flange 31 from below, and the rear end portion 32 of the fastening flange 31 The gap between the lower surface and the recess 52 is closed.

  In the present embodiment, the upper end of the main lip portion 63 is in contact with the lower surfaces of the left and right outer portions of the rear end portion 32 of the fastening flange 31 in a curved state rearward.

  Further, as shown in FIG. 14, the left and right central portions of the main lip portion 63 abut against the folded portion 32 f of the rear end portion 32 of the fastening flange 31 from the rear, and a gap between the folded portion 32 f and the recessed portion 52. That is, the gap between the left and right center portion of the rear end portion 32 of the fastening flange 31 and the recess 52 is closed.

  In the present embodiment, the main lip portion 63 extends upward while curving backward from the upper edge of the supported portion 62, wraps around the folded portion 32f, and contacts the rear surface of the folded portion 32f from the rear.

  Further, as shown in FIGS. 6 and 15, the protrusion 65 a of each extension portion 65 is sandwiched between the front surface of the second support portion 54 b of the end plate 5 and the rear fastening surface 11 and is in close contact with them. It is supposed to be. Specifically, each extending portion 65 is in contact with the rear fastening surface 11, and the rear end of the protrusion 65a is in contact with the front surface of the second support portion 54b in the vertical direction.

  Therefore, in the present embodiment, the protrusion 65a is a gap between the second support portion 54b and the rear side fastening surface 11, and a portion between the left and right side surfaces of the protruding portion 29 and the recess 52, The space connecting the outside of the mission case 41 is also closed.

  In the present embodiment, as shown in FIG. 15, the supported portion 62 extends in the vertical direction across the first support portion 54a and the second support portion 54b, and is in close contact with the front surfaces of the support portions 54a and 54b. Thus, the supported portion 62 closes the left and right inner portions of the cutout portion 59 between the second support portion 54b and the first support portion 54a from the front.

  Further, as shown in FIG. 10, notch lip portions 67 are arranged in front of the left and right end portions of the notch portion 59. For this reason, both the left and right end portions of the cutout portion 59 and the portions located on the left and right outside of the seal member support portion 54 are also blocked from the front by the cutout lip portion 67.

  In this way, in the present embodiment, the gap that is formed around the protruding portion 29 and communicates between the inner space of the mission case 41 and the cylinder block 3 and the outside thereof is closed by the seal member 6.

  As described above, in this embodiment, the portion 22 that is the lower end central portion 22 of the rear end portion of the lower block 20 and to which the rear end portion 32 of the fastening flange 31 is fastened is protruded rearward from the rear fastening surface. Thus, a protruding portion 29 is provided. Therefore, the length in the front-rear direction of the portion 22 to which the rear end portion 32 of the fastening flange 31 is fastened without shifting the position of the rear end portion of the cylinder block 3 other than the lower end central portion 22 to the rear side. The rigidity can be increased by increasing the length. Therefore, while securing the fastening force between the oil pan 30 and the lower block 20, the length of the front and rear direction of the portion of the cylinder block 3 where the protruding portion 29 is not provided is shortened to reduce the weight of the engine body 2. be able to.

  Then, by providing the end plate 5 with a recess 52 surrounding the protruding portion 29 and retracting the protruding portion 29 into the recess 52, the contact between the end plate 5 and the rear fastening surface 11 can be maintained.

  However, when the recess 52 is provided in the end plate 5 in this manner, a clearance between the lower surface of the protruding portion 29 and the recess 52 and the communication between the inside and the outside of the transmission case 41 and the cylinder block 3 protrudes. It is formed around the portion 29. On the other hand, in the present embodiment, as described above, the gap that communicates the inside and the outside of the transmission case 41 and the cylinder block around the protruding portion 29 is closed by the seal member 6. Therefore, it is possible to reduce the weight of the engine main body 2 while securing the fastening force between the oil pan 30 and the cylinder block 3 and to suppress the leakage of sound from the inside of the transmission case 41 and the cylinder block 3 to the outside. can do.

  In the present embodiment, as described above, the protrusion 65a is held between the rear fastening surface 11 and the second support portion 54b, that is, the end plate 5. Therefore, it is possible to suppress the seal member 6 from dropping from between the cylinder block 3 and the transmission case.

  In the present embodiment, a folded portion 32 f is formed at the rear end portion 32 of the fastening flange 31. Therefore, the rigidity of the rear end portion 32 of the fastening flange 31 can also be increased.

  In addition, in the present embodiment, the folded portion 32f is provided only at the left and right center portion of the rear end portion 32 of the fastening flange 31 where the oil pan side bolt hole 31a is formed. Accordingly, the rigidity of the rear end portion 32 of the fastening flange 31 can be effectively increased.

  In the present embodiment, a retracting portion 55 that is further recessed downward is provided in the left and right center portion of the rear end portion 32 of the fastening flange 31 in the recess 52. In other words, the left and right outer portions of the retracting portion 55 of the recess 52 are positioned higher. Therefore, the distance between the left and right outer portions of the rear end portion 32 of the fastening flange 31 and the recess 52 can be shortened while suppressing interference between the folded portion 32 f and the end plate 5. Sound leakage from the gap between the rear end portion 32 and the recess 52 can be more reliably suppressed.

  Here, although the said embodiment demonstrated the case where the sealing member 6 was fixed to the end plate 5 with the double-sided tape, the fixing structure of the sealing member 6 is not restricted to this.

  For example, as shown in FIG. 16, the seal member 106 is provided with one or a plurality of protrusions 106 a protruding from the surface thereof, and the end plate 5 is provided with a corresponding fitting hole so that these are fitted. The seal member 106 may be fixed to the end plate 5.

  Further, the notch lip portion 67 of the seal member 6 may have any shape that can close the notch portion 59, and the notch lip portion 167 faces the notch portion 59 as shown in FIG. You may comprise only a part.

  In the embodiment, the case where the thickness of the main lip portion 63 is made smaller than the thickness of the supported portion 62 has been described, but these thicknesses may be equal. However, if the thickness of the supported portion 62 that is fixed to the end plate 5 is increased to increase the rigidity, the seal member 6 can be stably fixed to the end plate 5.

  In the above-described embodiment, the case where the main lip portion 63 is configured to extend upward from the front portion of the upper edge of the supported portion 62 has been described. However, the front-rear direction of the main lip portion 63 and the supported portion 62 is described. The positional relationship is not limited to this. However, if the main lip portion 63 is arranged further forward, when the main lip portion 63 curves backward, it is more reliably avoided that the main lip portion 63 interferes with a member such as a drive plate arranged behind the end plate 5. be able to.

  In the embodiment, the rear end portion 32 of the fastening flange 31 is positioned below the protruding portion 29, and the seal member 6 forms a gap between the recess 52 and the rear end portion 32 of the fastening flange 31. Although the case where it closes was demonstrated, the rear-end part 32 of the flange 31 for fastening may be arrange | positioned more front side, and you may make it directly block | close the clearance gap between the lower surface of the protrusion part 29, and the recessed part 52 with the sealing member 6. FIG.

  Further, the folded portion 32f, the notch 59, and the notch lip portion 67 can be omitted.

DESCRIPTION OF SYMBOLS 1 Engine 2 Engine main body 3 Cylinder block 4 Mission 5 End plate 6 Seal member 11 Rear side fastening surface 21 Lower side fastening surface 29 Protruding part 30 Oil pan 32f Folding part 41 Mission case 52 Recessed part 61 Sealing body part 65 Extension part

Claims (4)

An engine body, a mission case disposed behind the engine body and fastened to a rear fastening surface formed at a rear end portion of the engine body, and disposed below the engine body and formed at a lower end portion of the engine body. An oil pan that is fastened to the lower fastening surface, and an end plate that has an opening in the center and is disposed between the front end surface of the transmission case and the rear fastening surface in contact with them. The peripheral structure of the end plate in the engine,
The engine body has a protruding portion that protrudes rearward from the rear fastening surface at a lower end central portion corresponding to a rear end portion of the lower fastening surface among rear end portions.
The rear side fastening surface is formed in a region excluding the protruding portion of the outer peripheral portion of the rear end portion of the engine body,
On the lower side of the opening edge of the end plate, a recess is formed that is recessed downward so as to surround the protruding portion.
An engine end plate peripheral structure is characterized in that a seal member that closes a gap between the recess and the lower surface of the protruding portion is fixed to the recess. The engine end plate peripheral structure according to claim 1,
The rear end portion of the oil pan extends below the protruding portion,
The engine end plate peripheral structure, wherein the seal member closes a gap between the recess and a lower surface of a rear end portion of the oil pan. The structure around the end plate of the engine according to claim 2,
On the rear edge of the rear end portion of the oil pan, a folded portion that is folded downward is formed,
The folded portion is formed only at the central portion of the rear edge of the rear end portion of the oil pan,
An engine end plate peripheral structure, wherein a portion of the recess facing the folded portion is recessed below the other portion of the recess. The engine end plate peripheral structure according to any one of claims 1 to 3,
The protruding portion has a shape extending in the width direction of the engine body,
The seal member includes a seal body portion extending in a width direction of the engine body along a lower surface of the projecting portion, and a width direction of the engine body of the projecting portion from both ends of the seal body portion in the width direction of the engine body. Each having an extending portion extending upward along both edges thereof,
Each of the extending portions is sandwiched between the end plate and the engine body.

Images