JP6097209B2 - Bearing member - Google Patents

Description

  The present invention relates to a technology of a bearing member.

  Conventionally, as a bearing member for supporting a crankshaft in an engine cylinder block, a semi-cylindrical first member (metal) that receives a load in a direction orthogonal to the axial direction of the crankshaft, and a crankshaft of the metal A configuration is known that includes a second member (washer) that is formed in a semicircular shape extending outward in the radial direction from both ends in the axial direction and that receives a load in the axial direction (for example, Patent Documents). 1).

Special table 2008-510107 gazette

  In a bearing member configured as in the prior art, a plurality of engaging protrusions are formed at the radially inner end of the washer, and a plurality of engaging protrusions engage with both ends of the metal in the axial direction. To be engaged (see FIGS. 5A and 5B). And it is crimped in the state which the engagement convex part engaged with the to-be-engaged recessed part. Furthermore, in order to increase the degree of freedom regarding the axial displacement of the washer and to bring the washer and the cylinder block into close contact with each other, the engaging convex portion is caulked with a slight gap inside the engaged concave portion, and the engaging convex portion is engaged. The convex portion is configured to be movable in the axial direction within the engaged concave portion.

  However, when the bearing member is held, if a force is applied as shown by an arrow F in FIG. 5C to hold the upper part of the washer, the washer rotates as shown by a two-dot chain line in FIG. 5C. However, there was a problem that the lower part of the washer was widened. In particular, when the bearing member is attached to an assembling jig for assembling the bearing member to the cylinder block as shown by an arrow C in FIG. 5 (c), if the robot arm clamps the upper part of the washer, the lower part of the washer May be larger than the width b1 of the recess of the assembly jig. In this case, as shown in the range α in FIG. 5C, the lower part of the washer interferes with the assembly jig, and the bearing member may not be attached to the assembly jig.

  Then, in view of the subject which concerns on this invention, even when the upper part is clamped, the bearing member which becomes possible [suppressing the widening in the lower part] is provided.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

  That is, in claim 1, the first member is formed in a semi-cylindrical shape divided into two parallel to the axial direction, and receives a load in a direction orthogonal to the axial direction, and the axial direction of the first member is A second member that is formed in a semicircular shape extending radially outward from both ends and receives a load in the axial direction, and a radially inner end of the second member Are formed with a plurality of engaging projections projecting radially inward, and a central engaging projection is formed as the engaging projection at a substantially central portion in the circumferential direction of the second member. Side engaging protrusions are formed as the engaging protrusions on both side portions spaced from the central engaging protrusion in the circumferential direction of the two members, and the axially opposite ends of the first member are A plurality of recessed portions to be engaged with which the engaging convex portion engages are formed, A central engaged recess that engages with the central engaging convex portion is formed as the engaged concave portion at a substantially central portion in the circumferential direction of one member, and the central engaged portion in the circumferential direction of the first member A laterally engaged concave portion that engages with the laterally engaging convex portion is formed as the engaged concave portion in each of the both side portions separated from the concave portion, and the engaging convex portion is It is caulked in a state of being engaged with the recess, and is configured to be movable in the axial direction in the engaged recess. The axial depth of the central engaged recess is the side engaged recess. It is formed shallower than the groove depth in the axial direction.

  In Claim 2, the said side engagement convex part and the said side engaged recessed part are said 1st members, respectively in the both sides of the said center engaging convex part and the said center engaged recessed part, respectively. And it forms in the position where the angle from the circumferential direction edge part of said 2nd member becomes smaller than 45 degree | times.

  In Claim 3, it is a bearing member assembled | attached to the crankshaft support part of an engine block, Comprising: The value which subtracted the axial groove depth of the said center engaged recessed part from the axial direction length of said 1st member. The crankshaft support portion is formed to be equal to or shorter than the axial length.

  As effects of the present invention, the following effects can be obtained.

  That is, even when the upper part of the bearing member is clamped, it is possible to suppress the widening at the lower part.

The perspective view which shows the bearing member which concerns on 1st embodiment. (A) to (c) are a right side view, a front view, and a bottom view, respectively, showing a bearing member according to the first embodiment. (A) is a bottom view which shows the state before the assembly of the bearing member which concerns on 1st embodiment, (b) is a front view which shows the state which similarly attaches a bearing member to an assembly | attachment jig | tool. (A) And (b) is the right view and front view which respectively show the bearing member which concerns on 2nd embodiment. (A) And (b) is the right view and bottom view which respectively show the bearing member which concerns on a prior art, (c) is a front view which shows the state which similarly attaches the bearing member which concerns on a prior art to an assembly jig | tool.

  Next, embodiments of the invention will be described. FIG. 1 is a perspective view of a bearing member 10 according to the first embodiment of the present invention, and the direction in the bearing member 10 is defined by the direction of the arrow shown in FIG.

First, the bearing member 10 according to the present embodiment will be described with reference to FIGS. 1 to 3.
The bearing member 10 is a member that is assembled to a crankshaft support portion that supports the crankshaft in the cylinder block B of the engine, and is manufactured by combining a plurality of metal parts that have undergone processing such as heat treatment. When the bearing member 10 is used, as shown in FIG. 1, the two bearing members 10 are arranged at positions facing each other vertically. In the crankshaft support portion of the cylinder block B, the upper bearing member 10 (10a) and the lower bearing member 10 (10b) support the upper and lower sides of the crankshaft, respectively. The upper bearing member (10a) and the lower bearing member 10 (10b) have the same configuration except that the arrangement directions are opposite. Therefore, the upper bearing member (10a) will be described below, and detailed description of the lower bearing member 10 (10b) will be omitted. In addition, although the bearing member 10 which concerns on this embodiment is set as the structure arrange | positioned at the crankshaft support part in the cylinder block B, you may use it for another use.

The bearing member 10 includes a single metal 11 that is a first member and two washers 12 that are second members.
The metal 11 is a member formed in a semi-cylindrical shape that is divided into two parallel to the axial direction. The metal 11 receives a load in a direction orthogonal to the axial direction (left-right direction in FIG. 1). The washer 12 is a member formed in a semicircular shape that extends radially outward from both end portions of the metal 11 in the axial direction. Each washer 12 receives a load in the axial direction.

  A plurality of engaging projections 12a and 12b projecting radially inward are formed at the radially inner end of the washer 12. The engaging projections 12a and 12b are formed in a substantially rectangular shape in a side view. In the present embodiment, a total of three engaging convex portions 12a and 12b are formed at the radially inner end of the washer 12, one at the substantially central portion in the circumferential direction and one at each position that is symmetrical in the front-rear direction. Yes.

  In the bearing member 10 according to the present embodiment, the engaging convex portion formed at the substantially central portion in the circumferential direction of the washer 12 is defined as the central engaging convex portion 12a, and is separated from the central engaging convex portion 12a in the circumferential direction of the washer 12. The engaging protrusions formed on the both side portions are the side engaging protrusions 12b and 12b.

  At both ends of the metal 11 in the axial direction, a plurality of recessed portions 11a and 11b to be engaged with the engaging convex portions 12a and 12b are formed at positions corresponding to the engaging convex portions 12a and 12b of the washer 12. ing. In the present embodiment, a total of three engaged recesses 11a and 11b are formed at both ends of the metal 11 in the axial direction, one at a substantially central portion in the circumferential direction and one at a position that is symmetrical in the front-rear direction. Yes. The engaged concave portions 11a and 11b are formed to have a slightly larger circumferential length than the engaging convex portions 12a and 12b to the extent that the engaging convex portions 12a and 12b can be inserted.

  In the bearing member 10 according to the present embodiment, an engagement recess formed at a substantially central portion in the circumferential direction of the metal 11 and engaged with the central engagement protrusion 12a is defined as a center engaged recess 11a, and the metal 11 is in the circumferential direction. The engaging recesses formed on both side portions spaced apart from the central engaged recess 11a are side engaged recesses 11b and 11b with which the side engagement protrusions 12b engage.

  When the washer 12 is assembled to the metal 11, the engaging convex portions 12 a and 12 b of the washer 12 are inserted into the corresponding engaged concave portions 11 a and 11 b in the metal 11, as indicated by an arrow A in FIG. To do. The engagement convex portions 12a and 12b are caulked in a state of being engaged with the engaged concave portions 11a and 11b. At this time, the washer 12 is not completely fixed to the metal 11, but the engaging protrusions 12a and 12b are caulked with a slight gap inside the engaged recesses 11a and 11b. That is, as shown by the arrow M in FIG. 2 (c), the engaging convex portions 12a and 12b are caulked to the extent that they can move in the axial direction within the engaged concave portions 11a and 11b. This is because the washer 12 and the cylinder block B are brought into close contact with each other when the bearing member 10 is assembled to the cylinder block B by increasing the degree of freedom regarding the axial displacement of the washer 12.

  And in the bearing member 10 which concerns on this embodiment, the groove depth (width | variety d1 shown in FIG.2 (c)) of the axial direction of the center engaged recessed part 11a is the axial direction of the side engaged recessed part 11b. It is formed shallower than the groove depth (width d2 shown in FIG. 2C). Thereby, when the upper part of the bearing member 10 is clamped, it becomes possible to suppress the widening in the lower part.

  Specifically, when the bearing member 10 is held, when the force is applied as shown by the arrow F in FIG. 3B and the upper parts of the washers 12 and 12 are clamped, the shaft of the central engaging convex portion 12a Directional displacement is regulated by the central engaged recess 11a. For this reason, the displacement of the washer 12 in the axial direction is suppressed as compared with the prior art, and the rotation angle of the washer 12 in the left-right direction (rotation angle of rotation about the front-rear direction) is reduced. That is, as indicated by the two-dot chain line in FIG. 3B, the widening of the lower portion of the washers 12 and 12 can be made smaller than that of the prior art.

  Further, in the bearing member 10 according to the present embodiment, when the bearing member 10 is attached to the assembly jig U for assembling the bearing member 10 to the cylinder block as shown by the arrow B in FIG. Even when the robot arm clamps the upper portions of the washers 12 and 12, the width of the lower portions of the washers 12 and 12 can be prevented from becoming larger than the width b1 of the concave portion of the assembly jig U. That is, it is possible to prevent the lower part of the washer and the assembling jig from interfering with each other as in the prior art, and the bearing member cannot be attached to the assembling jig.

  Further, in the bearing member 10 according to the present embodiment, a value obtained by subtracting the axial groove depth of the central engaged recess 11a from the axial length of the metal (the length of the width L1 shown in FIG. 3A). ) Is less than or equal to the axial length of the crankshaft support in the cylinder block B (the length of the width x1 shown in FIG. 1). Thereby, the central engagement convex portion 12a is prevented from being displaced in the axial direction by the central engaged concave portion 11a, thereby preventing a gap from being formed between the washer 12 and the cylinder block B. That is, by securing the degree of freedom regarding the axial displacement of the washer 12, the washer 12 and the cylinder block B can be brought into close contact with each other when the bearing member 10 is assembled to the cylinder block B. For this reason, rattling between the washer 12 and the cylinder block B is eliminated, and the durability of the bearing member 10 can be improved.

  Next, the bearing member 110 which concerns on 2nd embodiment of this invention is demonstrated using FIG. In the present embodiment, the description of the same configuration as that of the bearing member 10 according to the first embodiment will be omitted, and a description will be given focusing on a different configuration.

  Similar to the bearing member 10, the bearing member 110 includes one metal 111 that is a first member and two washers 112 that are second members.

  A plurality of engaging projections 112a and 112b projecting inward in the radial direction are formed at the radially inner end of the washer 112. In the present embodiment, in the washer 112, a total of three engaging convex portions 112a and 112b are formed, one at a substantially central portion in the circumferential direction and one at a symmetrical position.

  In the bearing member 110 according to the present embodiment, the engaging convex portion formed at the substantially central portion in the circumferential direction of the washer 112 is defined as the central engaging convex portion 112a, and is separated from the central engaging convex portion 112a in the circumferential direction of the washer 112. The engaging protrusions formed on the both side portions are the side engaging protrusions 112b and 112b.

  At both ends of the metal 111 in the axial direction, a plurality of recessed portions 111a and 111b to be engaged with the engaging convex portions 112a and 112b are formed at positions corresponding to the engaging convex portions 112a and 112b of the washer 112. ing. In the present embodiment, in the metal 111, a total of three engaging recesses 111a and 111b are formed, one at a substantially central portion in the circumferential direction and one at a position that is symmetrical in the front-rear direction. The engaged concave portions 111a and 111b are formed to have a slightly larger circumferential length than the engaging convex portions 112a and 112b to the extent that the engaging convex portions 112a and 112b can be inserted.

  In the bearing member 110 according to the present embodiment, an engagement recess formed at a substantially central portion in the circumferential direction of the metal 111 and engaged with the center engagement protrusion 112a is defined as a center engaged recess 111a. The engagement recesses formed on both side portions spaced apart from the central engaged recess 111a are side engaged recesses 111b and 111b with which the side engagement protrusions 112b engage.

  Also in the bearing member 110 according to the present embodiment, the axial groove depth of the central engaged recess 111a is shallower than the axial groove depth of the side engaged recess 111b. Thereby, when the upper part of the bearing member 110 is clamped, it becomes possible to suppress the widening in the lower part.

  Furthermore, in the bearing member 110 according to the present embodiment, as shown in FIG. 4A, the side engaging convex portions 112 b and 112 b and the side engaged concave portions 111 b and 111 b are formed around the metal 111 and the washer 112. The angle from the direction end (the angle θ in FIG. 4A) is formed at a position smaller than 45 degrees. In other words, the metal 111 and the washer 112 are compared with the bearing member 10 according to the first embodiment in the vertical position of the side engagement convex portions 112b and 112b and the side engaged concave portions 111b and 111b in a front view. It is close to the bottom of the. Thereby, when the upper part of the bearing member 110 is clamped, it becomes possible to suppress the widening in the lower part more.

  Specifically, since the vertical positions of the side engaging convex portions 112b and 112b and the side engaged concave portions 111b and 111b are formed low, when the bearing member 110 is held, in FIG. When the force is applied and the upper parts of the washers 112 and 112 are clamped as shown by the arrow F, the center a2 of rotation of the washer 112 in the left-right direction (rotation around the front-rear direction) is related to the first embodiment. It becomes lower than the rotation center a1 of the bearing member 10 (see FIG. 3B). For this reason, the axial displacement of the lower part of the washer 112 can be suppressed as compared with the displacement in the bearing member 10 according to the first embodiment, and the widening at the lower part of the bearing member 110 can be further suppressed. It becomes.

  In the above-described embodiment, the upper bearing member and the lower bearing member have the same configuration. However, the configuration is not limited to the same configuration. For example, only the upper bearing member has an oil supply hole. Also good. Moreover, although the upper bearing member and the lower bearing member are used as the bearing members, it is sufficient that at least one bearing member is used.

DESCRIPTION OF SYMBOLS 10 Bearing member 11 Metal 11a Center engaged recessed part 11b Side engaged recessed part 12 Washer 12a Center engaged convex part 12b Side engaged convex part

Claims (3)

A first member that is formed in a semi-cylindrical shape divided into two parallel to the axial direction, and receives a load in a direction orthogonal to the axial direction;
A second member that is formed in a semicircular shape extending radially outward from both axial ends of the first member, and receives a load in the axial direction,
A plurality of engaging projections projecting radially inward are formed at the radially inner end of the second member,
A central engaging convex portion is formed as the engaging convex portion at a substantially central portion in the circumferential direction of the second member, and both side portions spaced apart from the central engaging convex portion in the circumferential direction of the second member. Each is formed with a side engaging protrusion as the engaging protrusion,
A plurality of recessed portions to be engaged with which the engaging protrusions are engaged are formed at both ends in the axial direction of the first member,
A central engaged recess that is engaged with the central engaging convex portion is formed as the engaged concave portion at a substantially central portion in the circumferential direction of the first member, and the central covered portion in the circumferential direction of the first member is formed. A laterally engaged concave portion that engages with the laterally engaging convex portion is formed as the engaged concave portion in each of both side portions that are separated from the engaging concave portion,
The engaging projection is caulked in a state of being engaged with the engaged recess, and is configured to be movable in the axial direction within the engaged recess,
The axial depth of the central engaged recess is formed shallower than the axial depth of the side engaged recess.   The lateral engagement convex part and the laterally engaged concave part are respectively provided on one side of the central engaging convex part and the central engaged concave part, respectively, on the first member and the second member. The bearing member according to claim 1, wherein the bearing member is formed at a position where an angle from a circumferential end is smaller than 45 degrees. A bearing member assembled to a crankshaft support portion of an engine block,
The value obtained by subtracting the axial groove depth of the central engaged recess from the axial length of the first member is formed to be equal to or less than the axial length of the crankshaft support portion. The bearing member according to claim 1, wherein the bearing member is characterized.

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