JP2015034528A - Case member of internal combustion engine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent adherence of a seal agent to an oil level gauge by avoiding contact of the oil level gauge to the seal agent applied to a case member.SOLUTION: A case member 18 has a side edge part 24 joined to an engine body, and a gauge passage 36 provided along the side edge part 24 for insertion of an oil level gauge 34. The side edge part 24 has a joint surface 30 which is joined to a side face of the engine body, and a seal agent 32 is applied to the joint surface 30. Further, the case member 18 is provided with: a first abutting part 44a and a second abutting part 44b, which are extended between the joint surface 30 and the gauge passage 36 from the case member 18 and abut against the side face of the engine body; and a first recessed part 46a and a second recessed part 46b, which are respectively formed between the first abutting part 44a and the second abutting part 44b, and the joint surface 30 in a cross section along the transverse direction of the case member 18.

Description

  The present invention relates to a case member for an internal combustion engine that is attached to a side surface of the internal combustion engine to form a timing train chamber.

  For example, Patent Document 1 discloses that a groove portion that guides an oil level gauge downward from above is formed integrally with a chain cover that houses a timing chain and forms a chain chamber. An oil level gauge is detachably provided through the groove.

JP 2001-115816 A

  When the chain cover disclosed in Patent Literature 1 is attached to the engine body (internal combustion engine), for example, a liquid (liquid) sealant may be applied to the attachment surface of the chain cover. When the chain cover with sealant is attached to the engine body and the oil level gauge is inserted along the groove formed in the chain cover along the groove from the top to the bottom, the oil level gauge moves from the mounting surface to the chain chamber side. Contact with the protruding sealant may cause the sealant to adhere to the oil level gauge.

  If the sealant adheres to the oil level gauge, the oil level gauge may be inserted into or removed from the groove formed in the chain cover, and the sealing performance will be degraded due to the visibility of the oil and the reduced capacity of the sealant. There is a risk.

  The present invention has been made in view of the above points, and it is possible to prevent the sealant from adhering to the oil level gauge by avoiding contact of the oil level gauge with the sealant applied to the case member. It is an object of the present invention to provide a case member for a possible internal combustion engine.

  To achieve the above object, the present invention provides a case member of an internal combustion engine that is attached to a side surface of the internal combustion engine to form a timing train chamber, and the case member is a side edge joined to the internal combustion engine. And a gauge passage that is provided along the side edge portion and penetrates an oil level gauge, and the side edge portion has a joint surface joined to a side surface of the internal combustion engine, and the joint surface A sealant is applied to the case member, a contact portion extending from the case member between the joint surface and the gauge passage and contacting a side surface of the internal combustion engine, and the case member A recess formed between the contact portion and the joint surface is provided in a cross section along the short direction.

  According to the present invention, the contact portion formed between the joint surface and the gauge passage prevents the oil level gauge inserted along the gauge passage from interfering with the sealant applied to the joint surface. can do. Further, the sealing agent protruding from the joint surface to the gauge passage side is blocked by the contact portion, and the blocked sealing agent can be prevented from being stored in the recess and entering the gauge passage. As a result, in the present invention, contact of the oil level gauge with the sealant applied to the case member can be avoided, and adhesion of the sealant to the oil level gauge can be suitably prevented.

  Further, according to the present invention, the abutting portion and the concave portion are provided in a part in the longitudinal direction of the gauge passage, and the abutting portion is located above the abutting portion on the inner side wall of the joining surface. It is provided on the extended line of the inner wall located.

  According to the present invention, the width of the case member can be reduced by partially providing the contact portion and the concave portion in the gauge passage, and the extension of the inner wall located above the contact portion. Since it is provided on the line, when the oil level gauge is inserted along the gauge passage, it is possible to suppress the catching by the contact portion and to ensure good insertion of the oil level gauge.

  Furthermore, the present invention is characterized in that a taper surface is provided between the joint surface and the gauge passage, and the taper surface is continuous with the joint surface and extends along the joint surface. To do.

  According to the present invention, the sealant applied to the joint surface protrudes from the taper surface and solidifies to become a seal surface, and the sealability can be improved by the seal surface.

  Furthermore, the present invention is characterized in that a gap portion is provided between the tapered surface and both end portions along the longitudinal direction of the contact portion.

  According to the present invention, by forming a gap between the tapered surface and the contact portion, it is possible to ensure the continuity of the tapered surface and to form a recess that functions as a seal pool. Good sealing performance can be ensured.

  Furthermore, the present invention is characterized in that the abutting portion and the concave portion are provided at positions facing the mating surfaces of a cylinder block and a cylinder head constituting the internal combustion engine.

  According to the present invention, while ensuring the sealing performance at the three mating surfaces of the cylinder block, the cylinder head, and the case member, the interference between the sealing agent and the oil level gauge is prevented on the three mating surfaces. The oil level gauge can be inserted easily.

  Furthermore, the present invention is characterized in that the contact portion and the concave portion are provided in a bent portion of the gauge passage.

  According to the present invention, in the bent portion where the oil level gauge is bent and inserted, interference between the sealant and the oil level gauge can be prevented, and the oil level gauge can be inserted.

  Furthermore, the present invention is such that the oil level gauge is supported in contact with both the abutting portion in the bent portion and a wall portion forming the gauge passage located above the bent portion. Features.

  According to the present invention, it is possible to stably support the oil level gauge by supporting the oil level gauge at at least two points at the bent portion, for example, when the oil level gauge vibrates due to running vibration of the vehicle. However, interference with the sealing agent can be prevented.

  Furthermore, in the present invention, the depth dimension of the concave portion that is separated from the side surface of the internal combustion engine in a direction substantially orthogonal to the depth dimension of the gauge passage that is separated from the side surface of the internal combustion engine in a direction substantially orthogonal to the side surface. It is characterized by being set small.

  According to the present invention, by setting the depth dimension of the recess to be smaller than the depth dimension of the gauge passage, the contact portion is prevented from falling to the gauge passage side and the gauge passage is prevented from becoming narrow. Can do. Further, it becomes difficult to deform the side edge portion of the case member, thereby improving the rigidity and increasing the bonding strength of the case member to the internal combustion engine.

  According to the present invention, it is possible to obtain a case member for an internal combustion engine that can avoid contact of the oil level gauge with the sealant applied to the case member and prevent the sealant from adhering to the oil level gauge. .

It is a fragmentary perspective view of the engine main body with which the case member which concerns on embodiment of this invention was integrated. It is the side view which looked at the case member of FIG. 1 from the engine main body side. It is a partial expanded side view of the case member shown in FIG. (A) is a partial enlarged side view which shows the vicinity part of a 1st contact part and a 1st recessed part, (b) is a partial enlarged side view which shows the vicinity part of a 2nd contact part and a 2nd recessed part. FIG. 5 is a cross-sectional view taken along line VV in FIG.

Next, embodiments of the present invention will be described in detail with reference to the drawings as appropriate. 1 is a partial perspective view of an engine body in which a case member according to an embodiment of the present invention is incorporated, and FIG. 2 is a side view of the case member of FIG. 1 viewed from the engine body side.
In the present embodiment, the upper and lower sides of the drawing will be described below as the vertical direction, but the mounting direction of the engine body is not limited. The vertical direction is the cylinder axis direction (the direction of the cylinder axis L in FIG. 2) and the longitudinal direction of the case member. 2 may be inclined with respect to the vertical direction. When the cylinder axis L is inclined with respect to the vertical direction, the upper side of the plane orthogonal to the cylinder axis L is referred to as the upper side, and the lower side of the orthogonal plane is referred to as the lower side.

  As shown in FIG. 1, an engine body (internal combustion engine) 10 mounted on a vehicle such as an automobile (not shown) includes a cylinder block 12, a cylinder head 14 connected to the upper surface of the cylinder block 12, and the cylinder block 12. An oil pan 16 connected to the lower surface is provided.

  A case member 18 is attached to one side surface of the engine body 10. The timing train chamber 20 is formed by covering one side surface of the engine body 10 with the case member 18. The timing train chamber 20 is provided with a timing train mechanism (not shown) including, for example, a timing chain, a crank sprocket, a cam sprocket, a shoe, a tensioner and the like (not shown). Note that the lower end of the timing train chamber 20 communicates with the inside of the oil pan 16.

  As shown in FIG. 2, the case member 18 is located on both sides in the short direction of the general part 22 having a substantially rectangular shape and the general part 22 with the general part 22 therebetween, and extends along the longitudinal direction. A pair of side edge portions 24. In the case member 18 and the general portion 22, the vertical direction (cylinder axis direction) is the longitudinal direction, and the direction orthogonal to the vertical direction is the short direction. A circular shaft insertion hole 26 through which a crankshaft (not shown) is inserted is formed between the pair of side edge portions 24 and below the general portion 22. The general portion 22 is formed in a substantially flat plate shape facing the side surface of the engine body 10 with the timing train chamber 20 therebetween. The pair of side edge portions 24 extends to both side edges of the general portion 22 and is joined to the side surface of the engine body 10.

  A plurality of bolt insertion holes 28 through which a plurality of bolts (not shown) are inserted are formed in the pair of side edge portions 24. Further, the pair of side edge portions 24 is provided with a joining surface 30 that is joined to the side surface of the engine body 10 by being fastened by a plurality of bolts (not shown). For example, a liquid sealing agent 32 (see halftone dots in FIGS. 3, 4A, and 4B) is applied to the joint surface 30. The sealant 32 may be any material excluding a solid gasket. For example, it is preferable to use a FIPG (Formed In Place Gasket) material. The liquid sealing agent 32 is applied to the joint surface 30 by a predetermined application pattern from an application device (not shown) and then solidified to form a gasket.

  In the present embodiment, as shown in FIG. 3, an application pattern in which the sealing agent 32 is applied only to the inner portion of the side edge portion 24 is adopted, and the outer portion of the side edge portion 24 is connected to the side edge portion 24. Although the case where the side surface of the engine body 10 is in direct contact is illustrated, the present invention is not limited to this. For example, even when the sealing agent 32 is applied to the entire surface or substantially the entire surface of the side edge portion 24. Good.

3 is a partially enlarged side view of the case member shown in FIG. 2, FIG. 4 (a) is a partially enlarged side view showing the vicinity of the first contact portion and the first recess, and FIG. FIG. 5 is a cross-sectional view taken along the line V-V in FIG. 4A. FIG.
As shown in FIG. 3, a gauge passage 36 through which the oil level gauge 34 is inserted along the side edge 24 on one side is provided on one side of the pair of side edges 24. As shown in FIG. 5, the gauge passage 36 has a substantially rectangular cross section, a concave inner wall 38 continuous with the side edge 24, a ridge 40 extending along the side edge 24, an engine It is formed by a space portion that is closed by the side surfaces of the main body 10 (the cylinder block 12 and the cylinder head 14). As shown in FIG. 2, the oil level gauge 34 includes a grip portion 34 a that is gripped by an operator, and a gauge band 34 b that extends to an oil reservoir chamber (not shown) formed in the oil pan 16.

  Between the joint surface 30 and the gauge passage 36, a tapered surface 42 formed of a narrow inclined surface formed at the inner corner of the side edge portion 24 is provided (see FIGS. 3 to 5). The tapered surface 42 is formed to be continuous with the joint surface 30 and extend along the joint surface 30. When the case member 18 is joined to the side surface of the engine body 10, the sealing agent 32 applied to the joining surface 30 protrudes from the tapered surface 42 and solidifies to form a sealing surface.

  The case member 18 is located between the joint surface 30 and the gauge passage 36, extends from the case member 18 and contacts the side surface of the engine body 10, and extends along the short direction of the case member 18. In the cross section, a recess formed between the contact portion and the joint surface 30 is provided. The recess is formed so as to be recessed from the joint surface 30 toward the outer surface of the case member 18 on the opposite side to the joint surface 30 (see FIG. 5). In this embodiment, as an example, the contact portion is configured by the first contact portion 44a and the second contact portion 44b, and the recess portion is configured by the first recess portion 46a and the second recess portion 46b. However, the present invention is not limited to this, and for example, the contact portion and the recess may be formed over the entire side edge portion 24. In the present embodiment, the contact portion is formed integrally with the case member 18, but the contact portion may be formed separately from the case member 18.

  As shown in FIG. 3, the first contact portion 44 a and the first recess portion 46 a, and the second contact portion 44 b and the second recess portion 46 b are respectively provided in a part of the gauge passage 36 in the longitudinal direction. Yes. The first contact portion 44a is provided on an extension line T1 of the inner wall 48 positioned above the first contact portion 44a among the inner walls of the joint surface 30 (see FIG. 4A). Further, the second contact portion 44b is provided on an extension line T2 of the inner wall 50 located above the second contact portion 44b among the inner walls of the joining surface 30 (see FIG. 4B).

  The first contact portion 44a and the first recess 46a are located on the upper side of the case member 18 and are the three mating surfaces of the cylinder block 12, the cylinder head 14 and the case member 18 constituting the engine body 10 (see FIG. 1). It is provided in the position facing.

  As shown in FIG. 4A, the first contact portion 44a is formed by a projecting piece having a long rectangular shape when viewed from the side. The axis A1 of the first contact portion 44a is formed to extend in parallel with the axis A2 of the gauge passage 36. As shown in FIG. 5, the first recess 46 a faces the curved portion 51 formed by bending the corner of the inner wall and the side surface of the cylinder block 12 in the cross section along the short direction of the case member 18. An inner wall flat surface 53.

  A recess portion 55 that is substantially oval when viewed from the side and extends along the short side direction of the case member 18 is formed in a portion adjacent to the first recess 46a. A thick gasket portion thicker than other portions is formed in the recess portion 55 by solidifying the sealing agent that has entered the recess portion 55. For example, when a pressing force is applied from the cylinder block 12 to the case member 18 due to the thermal expansion of the cylinder block 12 that has been warmed up at the time of starting the engine body 10, the gasket thick wall portion follows and absorbs the pressing force. be able to.

  As shown in FIGS. 3 and 4 (b), the second contact portion 44b and the second recess 46b are located below the first contact portion 44a and the first recess 46a, and the gauge passage 36 itself. Is provided in the bent portion 54 that bends. In this case, the oil level gauge 34 is supported in contact with both the second contact portion 44 b in the bent portion 54 and the wall portion 56 that forms the gauge passage 36 positioned above the bent portion 54.

  The second contact portion 44b is formed of a rectangular protrusion piece that is long when viewed from the side, and has a dimension in the longitudinal direction larger than that of the first contact portion 44a. Similarly to the first recess 46 a, the second recess 46 b faces the curved portion 51 formed by bending the corner of the inner wall and the side surface of the cylinder block 12 in the cross section along the short direction of the case member 18. An inner wall flat surface 53. The cross section of the second contact portion 44b and the second recess 46b along the short direction of the case member 18 is the first contact portion 44a shown in FIG. 5 except that the recess portion 55 is not provided. And since it is the same as the 1st recessed part 46a, illustration is abbreviate | omitted.

  A gap 52 is provided between both end portions along the longitudinal direction (axial direction) of the first contact portion 44 a and the second contact portion 44 b and the tapered surface 42. As will be described later, each gap 52 functions as a relief from the tapered surface 42.

  As shown in FIG. 5, the depth dimensions D1 of the first recess 46a and the second recess 46b that are separated from the side surface of the engine body 10 in a direction substantially orthogonal to each other are respectively in a direction substantially orthogonal to the side surface of the engine body 10. It is set smaller than the depth dimension D2 of the gauge passage 36 that is separated (D1 <D2). The depth dimension D1 of the first recess 46a and the depth dimension D1 of the second recess 46b are the same or substantially the same (D1 = D1, D1≈D1).

  The engine main body 10 in which the case member 18 according to the present embodiment is incorporated is basically configured as described above. Next, the function and effect will be described.

  On the three mating surfaces (see FIG. 1) of the cylinder block 12, the cylinder head 14, and the case member 18, the application amount (application area) of the sealing agent 32 is increased compared to other parts (see FIG. 3). . In the present embodiment, the sealing agent 32 that protrudes from the joint surface 30 to the gauge passage 36 side is first applied by the first contact portion 44a formed between the joint surface 30 and the gauge passage 36 on the mating surface. The sealing agent 32 is blocked by the contact portion 44 a to prevent the sealing agent 32 from protruding into the gauge passage 36, and the blocked sealing agent 32 is stored in the first recess 46 a and enters the gauge passage 36. Can be suppressed. As a result, in the present embodiment, the contact of the oil level gauge 34 with the sealing agent 32 applied to the case member 18 can be avoided, and the adhesion of the sealing agent 32 to the oil level gauge 34 can be suitably prevented. . The first contact portion 44a and the first recessed portion 46a prevent the interference between the sealing agent 32 and the oil level gauge 34 on the three mating surfaces while ensuring the sealing performance at the three mating surfaces. Insertability of the oil level gauge 34 can be ensured.

  In the present embodiment, the oil level gauge 34 is bent by the second contact portion 44b formed between the joint surface 30 and the gauge passage 36 at the bent portion 54 of the gauge passage 36 closest to the joint surface 30 side. Further, it is possible to prevent the oil level gauge 34 inserted along the gauge passage 36 from being displaced toward the joint surface 30 to prevent the oil level gauge 34 from coming into contact with the sealing agent 32. Further, the sealing agent 32 that protrudes from the joint surface 30 toward the gauge passage 36 is blocked by the second contact portion 44a, and the blocked sealing agent 32 is stored in the second recess 46b so as to be within the gauge passage 36. It can suppress entering into. As a result, in the present embodiment, the contact of the oil level gauge 34 with the sealing agent 32 applied to the case member 18 can be avoided, and the adhesion of the sealing agent 32 to the oil level gauge 34 can be suitably prevented. . It should be noted that the oil level gauge 34 is prevented from interfering with the seal agent 32 and the oil level gauge 34 at the bent portion 54 where the oil level gauge 34 is bent and inserted by the second contact portion 44b and the second recess 46b. Can be secured.

  Further, in the present embodiment, the contact portions (first contact portion 44a, second contact portion 44b) and recesses (first recess 46a, second recess 46b) are partially provided in the gauge passage 36. In addition, the width dimension of the case member 18 can be reduced, and the contact portion is provided on the extension lines T1 and T2 of the inner side walls 48 and 50 located above the case member 18, so that the oil along the gauge passage 36 is provided. When the level gauge 34 is inserted, it is possible to suppress the catching by the abutting portion and to ensure good insertion of the oil level gauge 34.

  Furthermore, in this embodiment, by forming a tapered surface 42 that is continuous with the joint surface 30, the sealing agent 32 applied to the joint surface 30 protrudes from the taper surface 42 and solidifies to become a seal surface. The sealing performance can be improved by the surface.

  Furthermore, in this embodiment, the gap portion 52 is formed between the tapered surface 42 and the contact portions (the first contact portion 44a and the second contact portion 44b), thereby increasing the continuity of the tapered surface 42. In addition to being able to ensure, it is possible to form recesses (first recess 46a and second recess 46b) that function as seal reservoirs, and it is possible to ensure good sealing performance. In other words, the gap 52 functions as a relief of the tapered surface 42 and secures the sealing surface of the tapered surface 42.

  Furthermore, in this embodiment, the oil level gauge 34 can be stably supported by supporting the oil level gauge 34 at at least two points (wall portion 56, second contact portion 44b) in the bent portion 54 of the gauge passage 36. For example, even when the oil level gauge 34 vibrates due to the running vibration of the vehicle, the interference with the sealing agent 32 can be prevented.

  Furthermore, in the present embodiment, the depth dimension D1 of the first recess 46a and the second recess 46b that are separated from the side surface of the engine body 10 in the direction substantially orthogonal to each other is set to be substantially orthogonal to the side surface of the engine body 10. By setting it smaller than the depth dimension D2 of the spaced gauge passage 36 (D1 <D2), it is possible to prevent the contact portion from falling to the gauge passage 36 side and to prevent the gauge passage 36 from becoming narrow. it can. Further, the deformation of the side edge portion 24 of the case member 18 becomes difficult to improve the rigidity, and the joining strength of the case member 18 to the engine body 10 can be increased.

10 Engine body (internal combustion engine)
12 Cylinder Block 14 Cylinder Head 18 Case Member (Case Member of Internal Combustion Engine)
20 Timing train chamber 24 Side edge 30 Joint surface 32 Sealing agent 34 Oil level gauge 36 Gauge passage 42 Tapered surface 44a, 44b Abutting part 46a, 46b Recessed part 48, 50 Inner side wall 52 Gap part 54 Bending part 56 Wall part T1, T2 extension line

Claims (8)

A case member of an internal combustion engine that is attached to a side surface of the internal combustion engine to form a timing train chamber,
The case member has a side edge joined to the internal combustion engine, and a gauge passage provided along the side edge and through which an oil level gauge is inserted,
The side edge portion has a joint surface joined to a side surface of the internal combustion engine,
A sealing agent is applied to the joint surface,
The case member includes a contact portion extending from the case member and contacting a side surface of the internal combustion engine between the joint surface and the gauge passage, and a cross section along the short direction of the case member. A case member for an internal combustion engine, characterized in that a recess formed between the contact portion and the joint surface is provided. In the internal combustion engine case member according to claim 1,
The contact portion and the recess are provided in a part of the gauge passage in the longitudinal direction,
The case member of an internal combustion engine, wherein the contact portion is provided on an extension line of an inner wall located above the contact portion of the inner walls of the joint surface. In the internal combustion engine case member according to claim 1,
A tapered surface is provided between the joint surface and the gauge passage,
The case member of an internal combustion engine, wherein the tapered surface is continuous with the joint surface and extends along the joint surface. In the internal combustion engine case member according to claim 3,
A case member for an internal combustion engine, wherein a gap is provided between the tapered surface and both end portions along the longitudinal direction of the contact portion. The case member of the internal combustion engine according to claim 1 or 2,
The case member of an internal combustion engine, wherein the contact portion and the concave portion are provided at a position facing a mating surface of a cylinder block and a cylinder head constituting the internal combustion engine. The case member of the internal combustion engine according to claim 1 or 2,
The case member of an internal combustion engine, wherein the contact portion and the concave portion are provided in a bent portion of the gauge passage. The case member of the internal combustion engine according to claim 6,
A case of an internal combustion engine, wherein the oil level gauge is supported in contact with both the abutting portion in the bent portion and a wall portion forming the gauge passage located above the bent portion. Element. The case member of the internal combustion engine according to any one of claims 1 to 7,
The depth dimension of the recess that is separated from the side surface of the internal combustion engine in a direction substantially perpendicular to the side surface of the internal combustion engine is set smaller than the depth dimension of the gauge passage that is separated from the side surface of the internal combustion engine in a direction substantially orthogonal to the side surface. A case member for an internal combustion engine.

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