JP5281951B2 - Oil pan protective cover mounting structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a protection cover mounting structure for an oil pan effectively protecting the oil pan from impact applied on the oil pan. <P>SOLUTION: This structure includes the oil pan 2 mounted on a cylinder block Cb and a protection cover 1 mounted on the oil pan 2 so as to protect the oil pan 2. The protection cover 1 is provided with a cover body part 11 formed so as to cover the oil pan 2 and a front side impact absorbing part 12 projecting toward the oil pan 2 from the cover body part 11. The front side impact absorbing part 12 is provided with a fixing part 12c fixed on the oil pan 2. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a protective cover mounting structure when a protective cover for protecting an oil pan is attached to the oil pan.

  Conventionally, an oil pan fastened to a power device of a vehicle is often located at the lower part of the vehicle. Therefore, there is a possibility that the curbstone or the like comes into contact with the oil pan from below and the outer shape of the oil pan is deformed, or the pebbles flying when the vehicle travels hits the oil pan and breaks the oil pan. In order to avoid this, for example, the oil pan of Patent Document 1 is provided with a protective cover. The protective cover is attached to the frame of the vehicle so as to cover the bottom of the oil pan and the front bottom.

  Moreover, in the oil pan of patent document 2, the protective cover is attached so that the bottom part and front bottom part side of an oil pan may be covered, and the elastic member is arrange | positioned between the oil pan and the protective cover.

JP 2004-255984 A Japanese Utility Model Publication Sho 62-105349

  By the way, in Patent Document 1, when an impact that cannot be prevented by the protective cover is applied to the protective cover, the protective cover is deformed or broken, and the impact is applied to the oil pan without absorbing the impact.

  Therefore, it is conceivable to dispose an elastic member between the oil pan and the protective cover as in Patent Document 2. However, the elastic member is protected from the oil pan and the protection due to vibration of the power unit or secular change of the elastic member. When the impact is applied to the protective cover, the shock absorbing performance as intended may not be obtained.

  The present invention has been made in view of this point, and an object thereof is to provide a protective cover mounting structure for an oil pan that can effectively protect the oil pan from an impact applied to the oil pan.

In order to achieve the above object, according to the first aspect of the present invention, an oil pan that is attached to a power unit and a protective cover configured to protect the oil pan, the oil that attaches the protective cover to the oil pan. A protective cover mounting structure for a pan, wherein the protective cover includes a cover body portion formed to cover the oil pan, and a plate-like impact absorbing portion projecting from the cover body portion toward the oil pan. the provided, the above-mentioned oil pan, a rib protruding toward the protection cover so as to intersect with the shock absorbing portion is formed, and the shock absorbing portion, at least one of the above power plant and the oil pan It was set as the structure provided with the fixing | fixed part fixed.

In the second invention, in the first invention, the above-mentioned oil pan, and configured to engage portion engaged with the fixed portion of the protective cover is formed.

In the third invention, in the first invention, the above-mentioned fixed part, the oil pan mounting holes for mounting the protective cover fixing member is formed, the above-mentioned oil pan, the oil pan to the power unit fastening hole for mounting the fixed member been formed, has a configuration for mounting the protective cover to the oil pan and the fastening hole and the mounting hole and fastened to the power unit.

In the fourth invention, in any one invention of the first three, and a configuration in which the impact absorbing portion is formed integrally with the cover body portion.

  According to the first invention, since the shock absorbing part is fixed to at least one of the power unit and the oil pan by the fixing part provided in the shock absorbing part, before the shock is applied to the protective cover, the shock absorbing part The position with respect to the oil pan does not shift. Therefore, when the impact is applied to the protective cover, the impact absorbing portion can obtain the intended impact absorbing performance.

Further, when an impact is applied to the protective cover, the impact absorbing portion comes into contact with the plate-like rib formed on the oil pan, and the rib is deformed. Therefore, it can be set as the protective cover attachment structure which absorbs an impact further.

  According to the second invention, the protective cover is fixed to the oil pan by engaging the fixing portion provided in the shock absorbing portion with the engaging portion provided in the oil pan. Can be attached.

  According to the third aspect of the invention, since the fastening hole of the oil pan and the mounting hole of the protective cover are fastened together with the power unit and the protective cover is attached to the oil pan, the protective cover can be attached without increasing the number of parts. .

According to the fourth invention, since the shock absorbing portion is integrally formed with the cover body, the position connecting with the cover main body portion of the shock absorbing portion by applied shock to the protective cover is displaced with respect to the cover main body portion There is no. Therefore, when the impact is applied to the protective cover, the intended impact absorbing performance can be obtained.

It is the perspective view which showed the state which attached the protective cover to the oil pan. FIG. 2A is a perspective view showing a protective cover, FIG. 2A is a perspective view seen from the rear of the vehicle, and FIG. 2B is a perspective view seen from the front of the vehicle. It is the perspective view which looked at the baffle plate from the upper side. It is the perspective view which looked at the baffle plate from the lower side. It is the perspective view which looked at the oil pan main-body part from the upper side. It is the perspective view which looked at the oil pan main-body part from the lower side. It is sectional drawing in the AA of FIG. It is sectional drawing in the AA line of FIG. 1, Comprising: It is a figure when an impact is added to the protective cover. FIG. 3 is a view corresponding to FIG. 2 in a reference modification of the embodiment.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The following description of the preferred embodiment is merely exemplary in nature.

  FIG. 1 shows a protective cover mounting structure A of the present invention. The protective cover mounting structure A includes an oil pan 2 and a protective cover 1 that protects the oil pan 2. The oil pan 2 is for an engine (power unit) mounted in an engine room provided at the front of the automobile, and is attached to the lower surface of the cylinder block Cb of the engine as shown in FIG. It has become. The oil pan 2 is used as a part of the lubrication path of the engine, and the oil stored in the oil pan 2 is sucked from a strainer portion 43 provided in the oil pan 2 and supplied to each part of the engine for circulation. After that, the oil returns to the oil pan 2 from the return pipe Rt. The direction of the engine mounted in the engine room is such that the crankshaft extends in the left-right direction of the vehicle.

  In the description of this embodiment, for convenience of explanation, the front side of the vehicle is simply referred to as “front”, the rear side of the vehicle is simply referred to as “rear”, the left side of the vehicle is simply referred to as “left”, and the right side of the vehicle is simply referred to as “right”. It shall be called “right”.

  As shown in FIG. 1, the oil pan 2 has a substantially rectangular parallelepiped shape, and includes an oil pan main body portion 3 and a baffle plate 4 disposed inside the oil pan main body portion 3.

  As shown in FIG. 5, the oil pan main body 3 is a resin injection-molded product having a substantially rectangular parallelepiped shape. As shown in FIGS. 5 and 6, the oil pan main body 3 has a substantially rectangular bottom wall 31 and the bottom. And a side wall 32 rising from the periphery of the wall 31. As shown in FIG. 5, six protrusions 31 a projecting upward are formed on the right upper surface of the bottom wall portion 31. The protrusions 31 a are provided at equal intervals so as to draw a circle on the upper surface of the bottom wall portion 31. As shown in FIG. 6, three U-shaped engaging portions 31 b that open forward are formed at equal intervals in the left-right direction on the rear lower surface side of the bottom wall portion 31.

  The side wall portion 32 has a lower side wall portion 32a that rises straight upward from the peripheral edge of the bottom wall portion 31, and a lower side that protrudes outward so as to be orthogonal to the lower side wall portion 32a at the upper peripheral edge of the lower side wall portion 32a. And a superposed surface portion 32b. Further, a central side wall portion 32c that rises straight up from the outer peripheral edge of the lower overlapping surface portion 32b, and an upper overlapping surface portion 32d that protrudes outward so as to be orthogonal to the central side wall portion 32c at the upper peripheral edge of the central side wall portion 32c; have. Further, the upper side wall portion 32e rises straight up from the outer peripheral edge of the upper overlapping surface portion 32d, and the flange portion 32f protrudes outward at the upper end peripheral edge of the upper side wall portion 32e so as to be orthogonal to the upper side wall portion 32e. doing. That is, the side wall portion 32 is formed so as to have two steps. As shown in FIG. 7, the lower overlapping surface portion 32b is formed such that the rear portion is located slightly above the front portion of the lower overlapping surface portion 32b. Further, the upper side wall portion 32e and the flange portion 32f are formed with a thickness greater than that of the central side wall portion 32c and the lower side wall portion 32a, so that they are highly rigid portions in the oil pan 2.

  As shown in FIG. 5, the fastening holes H <b> 1 through which fastening bolts B (shown only in FIG. 7) for fastening the oil pan 2 to the cylinder block Cb (shown only in FIG. 7) are inserted into the flange portion 32 f. H4 is formed. Three fastening holes H1 are formed in the flange portion on the front side of the flange portion 32f. The fastening holes H2 are formed at equal intervals in the left-right direction at the flange portion on the rear side of the flange portion 32f. The fastening holes H3 are formed at two equal intervals in the front-rear direction at the right flange portion of the flange portion 32f, and the fastening holes H4 are formed at two equal intervals in the front-rear direction at the left flange portion of the flange portion 32f. ing.

  As shown in FIG. 7, an annular protrusion 32g protruding upward is formed on the inner peripheral edge of the lower overlapping surface portion 32b, and a lower annular recess 32i is formed by the annular protrusion 32g and the central side wall 32c. It has come to be. Further, an annular protrusion 32h protruding upward is formed on the inner peripheral edge of the upper overlapping surface portion 32d, and an upper annular recess 32j is formed by the annular protrusion 32h and the upper side wall 32e. . Also, ribs 32k protruding forward and extending left and right on the front wall portions of the central side wall portion 32c and the lower side wall portion 32a intersect with the front impact absorbing portion 12 of the protective cover 1 described later when viewed from the front of the oil pan 2. It is formed as follows. In addition, a rib 31k that protrudes downward and extends to the left and right is formed on the bottom wall portion 31 so as to intersect a lower impact absorbing portion 16 of the protective cover 1 described later when viewed from below the oil pan.

  The baffle plate 4 is a resin injection-molded product having a substantially rectangular parallelepiped shape. As shown in FIGS. 3 and 4, the baffle plate 4 has a substantially rectangular plate portion 41 and a side wall that rises straight from the periphery of the plate portion 41. Part 42, strainer part 43 that removes impurities by filtering the oil accumulated in oil pan body part 3 before sending it to the engine lubrication path, and oil passage formation part 44 that is formed so that oil flows. Yes.

  As shown in FIG. 7, the plate portion 41 is gently inclined so as to be positioned on the lower side as it goes forward. As shown in FIG. 4, an annular ridge 41 a that protrudes downward is formed on the outer peripheral edge of the plate portion 41. Further, the side wall portion 42 is formed with a flange portion 42 a that protrudes outward at a peripheral edge of the upper end of the side wall portion 42 so as to be orthogonal to the side wall portion 42. As shown in FIG. 4, an annular ridge 42b that protrudes downward is formed on the outer peripheral edge of the flange 42a.

  The strainer portion 43 is formed at the center in the front-rear direction on the right side of the baffle plate 4. As shown in FIGS. 3 and 4, the strainer portion 43 includes a cylindrical portion 43 a that protrudes downward from the lower surface of the plate portion 41, and an annular protruding portion that protrudes inward of the cylindrical portion 43 a from the lower end periphery of the cylindrical portion 43 a. 43b, and a discharge pipe portion 43c extending upward from the inner peripheral edge of the annular protrusion 43b. The lower end of the cylindrical portion 43 a is formed such that a gap is formed between the bottom surface portion 31 and the upper surface of the bottom wall portion 31 when the baffle plate 4 is assembled to the oil pan main body portion 3. As shown in FIG. 4, the annular protrusion 43b has six protrusions 43d protruding downward at equal intervals in the circumferential direction of the annular protrusion 43b. The protrusion 43 d is formed so as to coincide with the protrusion 31 a of the bottom wall portion 31 when the baffle plate 4 is attached to the oil pan main body portion 3.

  As shown in FIG. 3, the discharge pipe portion 43 c extends upward from the inner peripheral edge of the annular projecting portion 43 b so that a certain gap is formed between the inner wall surface of the cylindrical portion 43 a and the outer wall surface of the discharge pipe portion 43 c. It protrudes and a filter (not shown) is provided inside. As shown in FIG. 7, the discharge pipe portion 43c protrudes upward from the plate portion 41, is formed so that the tip portion is positioned above the flange portion 42a, and is connected to an oil pump (not shown).

  As shown in FIG. 3, the oil passage forming portion 44 is configured such that oil returning from the lubrication path flows, and is U-shaped from the rear right side to the front right side along the side wall portion 42 on the plate portion 41. It has the inclined surface part 44a formed so that it may extend, and the channel | path side wall part 44b which protrudes upwards so that the outer periphery of this inclined surface part 44a may be enclosed. As shown in FIG. 4, the inclined surface portion 44 a is formed with an oil receiving portion 44 c that is inclined so as to be positioned upward as it goes to the right side on the rear side of the plate portion 41, and as it goes to the right side on the front side of the plate portion 41. An oil outlet 44d that is inclined so as to be positioned below is formed. As a result, the oil returning from the lubrication path of the engine via the return pipe Rt flows from the oil receiving portion 44c toward the oil outlet portion 44d. As shown in FIG. 3, a rectifying plate 44 f that protrudes upward and extends in the oil flowing direction is provided at each of the left and rear left corners of the oil passage forming portion 44. Four sheets are formed at equal intervals in the direction. The oil outlet portion 44d is formed with a plurality of outlet holes 44e penetrating vertically so that oil flowing through the oil passage forming portion 44 can be guided to the oil pan body portion 3.

  As shown in FIG. 1, the protective cover 1 is a resin injection-molded product formed so as to cover the bottom of the oil pan 2 and the front bottom side. As shown in FIGS. 1 and 2, the left and right lengths of the protective cover 1 are formed to be longer than the left and right lengths of the oil pan 2. It has a front impact absorbing portion 12 and a lower impact absorbing portion 16 that absorb the impact applied to the main body portion 11. As shown in FIG. 7, when the protective cover 1 is attached to the oil pan 2, a space S is formed between the cover main body 11 and the oil pan 2.

  As shown in FIG. 2, the cover body 11 includes a plate-like lower cover surface portion 11a extending in the front-rear direction, and a plate-shaped upper cover surface portion 11b extending obliquely from the front of the lower cover surface portion 11a toward the front upper side. And have. Reinforcing ribs 11c projecting upward and extending along the left end are formed at the left and right ends of the lower cover surface portion 11a and the upper cover surface portion 11b. In addition, a circular through hole h1 penetrating vertically is formed in the lower portion of the lower cover surface portion 11a, and the three through holes h1 are formed at equal intervals in the left-right direction.

  As shown in FIG. 2, the lower impact absorbing portion 16 is formed integrally with the cover main body portion 11 on the upper surface of the lower cover surface portion 11a. The lower impact absorbing portion 16 includes a lower impact absorbing plate 16a that absorbs an impact, and an engaged portion (fixed portion) 16b that engages the protective cover 1 with the engaging portion 31b of the oil pan 2. ing. The lower impact absorbing portions 16 are formed in a three-sided manner in the left-right direction so as to overlap with the through-holes h1 in the front-rear direction, and when the protective cover 1 is attached to the oil pan 2, The engaged portion 16 b of the side impact absorbing portion 16 is in a position to engage with the engaging portion 31 b of the oil pan 2.

  The lower impact absorbing plate 16a protrudes upward from the lower cover surface portion 11a and extends rearward from the rear edge of the through hole h1. The lower edge of the lower shock absorbing plate 16a extends along the upper surface of the lower cover surface portion 11a, and the upper edge of the lower shock absorbing plate 16a extends straight rearward from the rear edge of the through hole h1. Yes. Further, the rear edge of the lower impact absorbing plate 16a extends straight up and down. As shown in FIG. 7, when the protective cover 1 is attached to the oil pan 2, a gap is formed between the upper end of the lower impact absorbing plate 16 a and the bottom wall portion 31 of the oil pan 2. It has become.

  The engaged portion 16b is formed in the upper part of the rear end of the lower impact absorbing plate 16a, and has an L shape that protrudes upward and protrudes rearward from the protrusion direction front end. By engaging the engaged portion 16b and the engaging portion 31b of the oil pan 2, the protective cover 1 and the lower portion of the oil pan 2 are fixed.

  The front impact absorbing portion 12 is formed integrally with the cover main body portion 11 on the rear surface of the upper cover surface portion 11b. The front shock absorbing portion 12 guides the fastening bolt B toward the front shock absorbing plate 12b for absorbing shock, a fixing portion 12c for fixing the protective cover 1 to the oil pan 2, and the fixing portion 12c. The guide plate portion 12a includes three guide plates 12a arranged in the left-right direction so as to overlap the engaged portion 16b in the front-rear direction.

  The front-side impact absorbing plate 12b has a plate shape that protrudes upward from the upper cover surface portion 11b and increases in vertical length from the upper edge to the lower edge of the upper cover surface portion 11b. The front edge of the front shock absorbing plate 12b extends along the inclination of the upper cover surface portion 11b, and the rear edge of the front shock absorbing plate 12b extends straight upward from a position adjacent to the through hole h1. In addition, the upper edge of the front impact absorbing plate 12b has a shape in which a central portion in the front-rear direction is curved downward. The upper end of the front impact absorbing plate 12 b is positioned above the upper end of the cover main body 11.

  The guide plate portion 12a is a plate material having an arc-shaped cross section that extends straight upward from the edge portion of the front half of the through hole h1. That is, the guide plate portion 12a is open to the rear side. As shown in FIG. 2, the upper end of the guide plate portion 12a protrudes above the upper end of the cover main body portion 11, and the front side of the guide plate portion 12a is connected to the rear edge of the front impact absorbing plate 12b.

  The fixing portion 12c has a ring shape and has a circular mounting hole 12d penetrating vertically. The fixed portion 12c is provided above the guide plate portion 12a, and the upper end open portion of the guide plate portion 12a communicates with the mounting hole 12d. Therefore, when the fastening bolt B (shown only in FIG. 7) is inserted into the through hole h1 from below the through hole h1, the fastening bolt B (shown only in FIG. 7) is smoothly attached by the inner surface of the guide plate portion 12a. It can be led to the hole 12d. Further, as shown in FIG. 7, the attachment hole 12 d is configured to coincide with the fastening hole H <b> 1 of the oil pan 2 when the protective cover 1 is attached to the oil pan 2.

  Next, the assembly of the oil pan 2, the attachment of the protective cover 1 to the oil pan 2, and the attachment of the oil pan 2 and the protective cover 1 to the cylinder block Cb will be described.

  First, as shown in FIG. 7, the baffle plate 4 is inserted from the opening of the oil pan body 3. At this time, the annular ridge 41 a of the baffle plate 4 is fitted into the lower annular recess 32 i of the oil pan body 3, and the annular ridge 42 b of the baffle plate 4 is engaged with the upper annular recess 32 j of the oil pan body 3. Mating. Further, the tip of the projection 43 d of the strainer portion 43 and the tip of the projection 31 a of the bottom wall portion 31 are in contact with each other. Then, the lower overlapping surface portion 32b and the annular protrusion 41a are welded, the upper overlapping surface portion 32d and the annular protrusion 42b are welded, and the protrusion 43d and the protrusion 31a are welded. Thereby, the baffle plate 4 is attached to the oil pan main body 3.

  Next, as shown in FIG. 7, the engaged portion 16 b of the protective cover 1 is engaged with the engaging portion 31 b formed on the lower surface of the bottom wall portion 31 of the oil pan 2. At this time, the attachment hole 12d of the protective cover 1 coincides with the fastening hole H1 below the fastening hole H1 of the oil pan 2. Then, the fastening bolt B is inserted into the mounting hole 12d and the fastening hole H1 from below, and the protective cover 1 and the oil pan 2 are fastened together on the cylinder block Cb. Further, the fastening bolt B is inserted into the fastening holes H2 to H4, and the oil pan 2 is attached to the cylinder block Cb. Therefore, the fixing portion 12c of the protective cover 1 is fixed to the highly rigid flange portion 32f in the oil pan 2. In addition, since the engaged portion 16b and the engaging portion 31b are engaged, the protective cover 1 can be attached to the oil pan 2 by fastening the attachment hole 12d and the fastening hole H1 to the cylinder block Cb. It is possible to easily attach the protective cover 1 without increasing the number of parts.

  Next, the case where a curbstone or the like contacts the protective cover 1 when the vehicle is traveling will be described. First, when a curb or the like hits the protective cover 1 when the vehicle travels at a low speed, that is, when a weak impact is applied to the upper cover surface portion 11b, the fixed portion 12c is located behind the front impact absorbing portion 12 and the oil pan 2 Since it is fixed to the flange portion 32f having a high rigidity, the front-side impact absorbing portion 12 is only elastically deformed, and almost no impact is applied to the oil pan 2. After the impact is applied to the upper cover surface portion 11b, the front impact absorbing portion 12 that has been elastically deformed is restored to its original shape. Further, when the vehicle comes into contact with the curb and a weak impact is applied to the lower cover surface portion 11a, the impact is hardly applied to the oil pan 2 only by the elastic deformation of the lower impact absorbing portion 16. After the impact is applied to the lower cover surface portion 11a, the lower impact absorbing portion 16 that has been elastically deformed is restored to its original shape.

  Next, when a curb or the like hits the protective cover 1 when the vehicle is traveling at medium speed, that is, when a slightly large impact is applied to the upper cover surface portion 11b, as shown in FIG. 12 and is fixed to the highly rigid flange portion 32f in the oil pan 2, first, the front impact absorbing portion 12 of the upper cover surface portion 11b is deformed to absorb the impact. At this time, since the space S is formed between the front side shock absorbing part 12 and the oil pan 2, even if the front side shock absorbing part 12 is deformed, the shock is not directly applied to the oil pan 2. ing. Further, between the front shock absorber 12 and the oil pan 2, the front shock absorber 12 is fixed to the oil pan 2 by a fixing portion 12 c provided in the front shock absorber 12. Before the impact is applied, the position of the front impact absorbing portion 12 with respect to the oil pan 2 is not shifted, and even if an impact is applied to the protective cover 1, the intended impact absorbing performance can be obtained. On the other hand, since the front impact absorbing portion 12 is formed integrally with the cover main body portion 11 between the front impact absorbing portion 12 and the protective cover 1, the cover of the front impact absorbing portion 12 is applied by the impact applied to the protective cover 1. The position connected to the main body portion 11 is not shifted with respect to the cover main body portion 11, and the intended shock absorbing performance can be obtained.

  Further, when the vehicle rides on the curb and a slightly larger impact is applied to the lower cover surface portion 11a, first, the lower impact absorbing portion 16 of the lower cover surface portion 11a is deformed to absorb the impact. At this time, since the space S is formed between the lower shock absorber 16 and the oil pan 2, even if the lower shock absorber 16 is deformed, the oil pan 2 is not directly impacted. It has become. Further, between the lower impact absorbing portion 16 and the oil pan 2, the lower impact absorbing portion 16 is fixed to the oil pan 2 by the engaged portion 16 b provided in the lower impact absorbing portion 16. Before the impact is applied to the protective cover 1, the position of the lower impact absorbing portion 16 with respect to the oil pan 2 is not shifted, and even if the impact is applied to the protective cover 1, the intended impact absorbing performance can be obtained. ing. On the other hand, since the lower impact absorbing portion 16 is formed integrally with the cover main body portion 11 between the lower impact absorbing portion 16 and the protective cover 1, the lower impact absorbing portion is affected by the impact applied to the protective cover 1. The position connected to the 16 cover main body portions 11 is not shifted with respect to the cover main body portion 11, and the shock absorbing performance as intended is obtained.

  When a curb or the like hits the upper cover surface portion 11b when the vehicle is traveling at high speed, that is, when a large impact is applied, the fixed portion 12c is positioned behind the front impact absorbing portion 12 and is rigid in the oil pan 2. Since it is fixed to the high flange portion 32 f, the impact is first absorbed by the front impact absorbing portion 12. At this time, since the front shock absorber 12 is fixed to the oil pan 2 between the front shock absorber 12 and the oil pan 2 by the fixing portion 12c provided in the front shock absorber 12, the protective cover 1 Before the impact is applied, the position of the front impact absorbing portion 12 with respect to the oil pan 2 is not shifted, and even if an impact is applied to the protective cover 1, the intended impact absorbing performance can be obtained. On the other hand, since the front impact absorbing portion 12 is formed integrally with the cover main body portion 11 between the front impact absorbing portion 12 and the protective cover 1, the cover of the front impact absorbing portion 12 is applied by the impact applied to the protective cover 1. The position connected to the main body portion 11 is not shifted with respect to the cover main body portion 11, and the intended shock absorbing performance can be obtained. After that, the front impact absorbing portion 12 comes into contact with the rib 32k formed on the oil pan 2, and the rib 32k is deformed to further absorb the impact. Further, when a vehicle rides on the curb and a large impact is applied to the lower cover surface portion 11a, the impact is first absorbed by the lower impact absorbing portion 16 of the lower cover surface portion 11a. At this time, between the lower impact absorbing portion 16 and the oil pan 2, the lower impact absorbing portion 16 is fixed to the oil pan 2 by the engaged portion 16 b provided in the lower impact absorbing portion 16. Therefore, before the impact is applied to the protective cover 1, the position of the lower impact absorbing portion 16 with respect to the oil pan 2 is not shifted, and even if the impact is applied to the protective cover 1, the intended impact absorbing performance can be obtained. It has become. On the other hand, since the lower impact absorbing portion 16 is formed integrally with the cover main body portion 11 between the lower impact absorbing portion 16 and the protective cover 1, the lower impact is caused by the impact applied to the lower cover surface portion 11a. The position where the absorbing portion 16 is connected to the cover main body portion 11 does not shift with respect to the cover main body portion 11, and the desired shock absorbing performance can be obtained. Thereafter, the lower impact absorbing portion 16 comes into contact with the rib 31k formed on the oil pan 2, and the rib 31k is deformed to further absorb the impact. As described above, since the impact is applied to the oil pan 2 after sufficiently absorbing the impact, damage to the oil pan 2 can be reduced.

  As described above, according to the protective cover mounting structure A of the present invention, the front shock absorber 12 is fixed to the oil pan 2 by the fixing portion 12c provided in the front shock absorber 12, so that the protective cover 1 Before the impact is applied, the position of the front impact absorbing portion 12 with respect to the oil pan 2 does not shift. Therefore, when an impact is applied to the protective cover 1, the intended impact absorbing performance can be obtained by the front impact absorbing portion 12.

  Further, since the engaged portion 16b provided in the lower impact absorbing portion 16 is engaged with the engaging portion 31b provided in the oil pan 2 to fix the protective cover 1 to the oil pan 2, the protective cover 1 is The oil pan 2 can be easily attached.

  Further, since the fastening hole H1 of the oil pan 2 and the mounting hole 12d of the protective cover 1 are fastened together with the cylinder block Cb and the protective cover 1 is attached to the oil pan 2, the protective cover 1 is attached without increasing the number of parts. Can do.

  Further, when a strong impact is applied to the protective cover 1, the plate-like rib 32 k comes into contact with the front impact absorbing portion 12 and is crushed or deformed. Therefore, it can be set as the protective cover attachment structure A which absorbs an impact further.

  Further, since the front impact absorbing portion 12 and the lower impact absorbing portion 16 are formed integrally with the protective cover 1, the cover main body portion of the front impact absorbing portion 12 and the lower impact absorbing portion 16 due to the impact applied to the protective cover 1. The position connected to 11 does not shift with respect to the cover body 11. Therefore, when the impact is applied to the protective cover 1, the intended impact absorption performance can be obtained.

FIG. 9 shows a reference modification of the protective cover 1. This reference modification is configured in the same manner as in the above embodiment except that the following points are different from those in the above embodiment. Therefore, the same components are denoted by the same reference numerals and detailed description thereof will be omitted. Omitted. That is, in the above-described embodiment, the front impact absorbing portion 12 is formed in a plate shape extending in the vertical direction. However, in this reference modification, as shown in FIG. It is formed to be put out.

  Similar to the above-described embodiment, three shock absorbers 13 are provided side by side in the width direction and are hollow. The impact absorbing portion 13 includes an impact absorbing portion main body 13 a that absorbs an impact, and a fixing portion 13 b for fixing the protective cover 1 to the oil pan 2. The shock absorber main body 13a has a shape extending in the vertical direction. The amount of bulging backward from the upper cover surface portion 11b in the shock absorber main body 13a increases as it approaches the upper end of the shock absorber main body 13a, and the vertical cross-sectional shape is such that the apex is located on the lower side. It has a triangular shape. Further, the rear edge portion, which is the leading edge in the bulging direction, of the shock absorbing portion main body 13a extends straight up and down in an arc shape whose cross section is curved to the rear side. Moreover, the cross-sectional shape of the shock absorber main body 13a has a substantially triangular shape such that the apex is located on the rear side, whereby the shock absorber main body 13a is tapered toward the rear side.

  An upper end opening 14 is formed on the upper end surface of the shock absorber main body 13a, and the upper end opening 14 opens the shock absorber main body 13a upward. Further, an opening 15 leading to the inside of the shock absorber main body 13a is formed at a portion corresponding to the shock absorber main body 13a in the upper cover surface portion 11b, and the shock absorber main body 13a is moved forward by the opening 15. Also open to the public.

  The fixing portion 13b is provided at the rear upper end of the shock absorbing portion main body 13a, and the lower end of the mounting hole 13c formed in the fixing portion 13b is opened inside the shock absorbing portion main body 13a. Thereby, the position of the attachment hole 13c can be visually recognized from the opening 15. Therefore, since the fastening bolt B (shown only in FIG. 7) can be inserted into the mounting hole 13c while visually recognizing the mounting hole 13c, the protective cover 1 can be easily attached to the oil pan 2.

  Further, the cross section of the shock absorber main body 13a has a triangular shape having a vertex on the rear side, and the vicinity of the vertex is fixed to the flange portion 32f of the oil pan 2, so that the structure is strong against impact. In addition, since the shock absorbing portion main body 13a has a hollow structure, it is easy to adjust the deformation of the shock absorbing portion main body 13a when an impact is applied, thereby improving the shock absorbing performance.

  In the present invention, the protective cover 1 is formed so as to cover the bottom part of the oil pan 2 and the front bottom part side, but it is formed so as to cover the right and left side walls of the side wall part 32 of the oil pan 2. Alternatively, the entire side wall 32 may be covered.

  Further, the number of the front shock absorbers 12 and the lower shock absorbers 16 is not limited to three, and the number of the front shock absorbers 12 and the lower shock absorbers 16 may be any number.

  Further, the front impact absorbing portion 12 and the lower impact absorbing portion 16 do not have to be plate-like, and may be box-like.

  Moreover, although the front side impact absorption part 12 is plate shape extended up and down, the plate shape extended right and left may be sufficient. Moreover, although the lower impact absorption part 16 is plate shape extended in the front-back direction, the plate shape extended in the left-right direction may be sufficient.

  Further, the fixed portion 12c may be configured to be directly attached to the cylinder block Cb.

  Further, the fixing portion 12c may be configured to be attached to the cylinder block Cb and the flange portion 32f.

  The present invention can also be applied to an oil pan of a power device such as an automatic transmission.

  The present invention is suitable, for example, for a protective cover mounting structure when a protective cover for protecting an oil pan is mounted on the oil pan.

DESCRIPTION OF SYMBOLS 1 Protective cover 11 Cover main-body part 12 Front side shock absorber 12b Front side shock absorber 12c Fixed part 12d Mounting hole 16 Lower shock absorber 16a Lower shock absorber 16b Engagement part (fixed part)
2 Oil pan 3 Oil pan body portion 31 Bottom wall portion 31b Engagement portion 31k Rib 32 Side wall portion 32k Rib H1 Fastening hole B Fastening bolt (fixing member)
S space

Claims (4)

An oil pan attached to the power unit; and a protective cover configured to protect the oil pan, wherein the protective cover is attached to the oil pan.
The protective cover includes a cover body portion formed so as to cover the oil pan, and a plate-shaped impact absorbing portion protruding from the cover body portion toward the oil pan,
The oil pan is formed with a rib that protrudes toward the protective cover so as to intersect the impact absorbing portion,
The impact absorbing portion, the power unit and the protective cover mounting structure of the oil pan, wherein a fixing portion fixed to at least one of which is provided between the oil pan. An oil pan protective cover mounting structure according to claim 1,
Above the oil pan, the protective cover mounting structure of the oil pan, wherein the engaging portion to be engaged with the fixing portion of the protective cover is formed. An oil pan protective cover mounting structure according to claim 1,
The aforementioned fixing portion, the mounting holes for attaching the fixed member to the protective cover to the oil pan is formed,
The above oil pan, fastening holes for attaching the fixed member to the oil pan to the power unit is formed,
Protective cover mounting structure for an oil pan and the fastening hole and the mounting hole and fastened to the power unit and wherein the mounting the protective cover to the oil pan. A protective cover mounting structure of the oil pan according to claims 1 to any one of 3,
Protective cover mounting structure for an oil pan in which the impact absorbing portion, characterized in that it is integrally molded with the cover body portion.

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