JP2015113890A - Bearing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bearing device which can improve seizure resistance and fatigue resistance by sufficiently securing an oil feed amount to an outside face of a washer, and can make a fresh lubricant flow to an external peripheral face of the washer.SOLUTION: A bearing device 10 comprises a main bearing 11 which is formed into a semi-cylindrical shape divided into two pieces in parallel with an axial direction, and receives a load in a direction orthogonal to the axial direction, and a washer 12 which is formed into a semi-disc shape extending to the outside of a radial direction from both end parts of the main bearing 11 in the axial direction, and receives a load in the axial direction. At least one oil feed hole 11a which makes an internal peripheral face and an external peripheral face communicate with each other is opened at the main bearing 11, and an oil feed groove 11b is formed at the internal peripheral face of the main bearing 11 along the axial direction.

Description

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

  Conventionally, as a bearing device for supporting a crankshaft in an engine cylinder block, a semi-cylindrical first member (main bearing) that receives a load in a direction orthogonal to the axial direction of the crankshaft, and a crank in the main bearing A configuration including a second member (washer) that is formed in a semicircular shape extending radially outward from both axial end portions of the shaft and receives a load in the axial direction is known (for example, Patent Document 1).

Special table 2008-510107 gazette

  In the bearing device configured as in the prior art, the outer surface of the washer (the surface opposite to the main bearing) is supplied with lubricating oil (side flow) flowing out from the main bearing. For this reason, a sufficient amount of oil supply to the outer surface of the washer cannot be ensured, and improvement of the seizure resistance and fatigue resistance of the bearing device has been a problem. Further, since the lubricating oil used in the main bearing flows into the outer peripheral surface of the washer, it was not possible to allow fresh lubricating oil to flow into the outer peripheral surface of the washer.

  Therefore, in view of the problem, the present invention can improve seizure resistance and fatigue resistance by ensuring a sufficient amount of oil supplied to the outer surface of the washer, and fresh lubricating oil can be applied to the outer peripheral surface of the washer. Provided is a bearing device that can be made to flow.

  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, a first member that is formed in a semi-cylindrical shape that is divided into two parallel to the axial direction and that receives a load in a direction orthogonal to the axial direction, and the shaft in the first member A second member that is formed in a semicircular shape extending radially outward from both ends in the direction and that receives a load in the axial direction, wherein the first member in the second member A second member oil supply groove communicating the inner end and the outer end of the second member is formed on the surface opposite to the member, and the first member is formed on the inner peripheral surface of the first member. An oil supply groove that guides the lubricating oil supplied to the second member oil supply groove is formed.

  According to a second aspect of the present invention, a circumferential oil supply groove is formed along the circumferential direction on the inner peripheral surface of the first member, and the oil supply groove includes the circumferential oil supply groove and the axial end of the first member. It is formed so as to communicate.

  According to a third aspect of the present invention, the first member is provided with at least one oil supply hole communicating the inner peripheral surface and the outer peripheral surface, and the oil supply groove is formed with the oil supply hole in the circumferential direction of the first member. They are formed at the same position.

  According to a fourth aspect of the present invention, the oil supply groove is formed along the axial direction.

  In Claim 5, in the inner peripheral surface of the first member, a circumferential oil supply groove is formed along the circumferential direction at the same position as the oil supply hole in the axial direction of the first member. , Formed so as to intersect with the circumferential oil supply groove.

  In the present invention, the second member oil supply groove is formed at the same position as the oil supply groove in the circumferential direction of the second member.

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

  That is, by securing a sufficient amount of oil supplied to the outer surface of the washer, seizure resistance and fatigue resistance can be improved, and fresh lubricating oil can be allowed to flow into the outer peripheral surface of the washer.

The perspective view which shows the bearing apparatus which concerns on 1st embodiment. FIGS. 4A to 4D are a right side view, a front view, a bottom view, and a cross-sectional view taken along line AA in FIG. 2A, respectively, illustrating the bearing device according to the first embodiment. (A) And (b) is the right view and bottom view which respectively show the bearing apparatus which concerns on 2nd embodiment. (A) And (b) is the right view and bottom view which respectively show the bearing apparatus which concerns on 3rd embodiment.

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

First, the bearing device 10 according to the present embodiment will be described with reference to FIGS. 1 and 2.
The bearing device 10 is a member that is assembled to a crankshaft support portion that supports a crankshaft in the cylinder block B of the engine, and is manufactured by combining a plurality of metal parts that have been subjected to processing such as heat treatment. When the bearing device 10 is used, as shown in FIG. 1, the two bearing devices 10 are arranged at positions facing each other vertically. In the crankshaft support portion of the cylinder block B, the upper bearing device 10 (10a) and the lower bearing device 10 (10b) support the upper and lower sides of the crankshaft, respectively. The upper bearing device (10a) and the lower bearing device 10 (10b) have the same configuration except that the arrangement directions are opposite. Therefore, the upper bearing device (10a) will be described below, and detailed description of the lower bearing device 10 (10b) will be omitted. In addition, although the bearing apparatus 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 device 10 includes one main bearing 11 that is a first member and two washers 12 and 12 that are second members.
The main bearing 11 is a member formed in a semi-cylindrical shape divided into two parallel to the axial direction. The main bearing 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 axial ends of the main bearing 11. Each washer 12 is disposed in an assembly groove formed in the cylinder block B and receives a load in the axial direction. The two washers 12 and 12 are arranged in a state where the inner peripheral portions thereof are close to the both axial end portions of the main bearing 11. In addition, it is set as the structure which forms the engaging part and the to-be-engaged part in the main bearing 11 and the washer 12, and assembles the main bearing 11 and the washer 12 by engaging this engaging part and the to-be-engaged part. It is also possible.
Further, in addition to the main bearing 11 and the washer 12 being configured as separate members as described above, the integral washer 12 is configured integrally with the main bearing, and the portions corresponding to the washer 12 portions on both sides are bent and configured. Also good.
If the main bearing 11 and the washer 12 are formed so that the lubricating oil supplied from the oil supply hole 11a flows to the washer oil supply groove 12a (the washer oil supply groove 12a communicates with the oil supply hole 11a). The oil supply groove 11b or the circumferential oil supply groove 11C may be configured to communicate with at least one of the oil supply groove 11b and the circumferential oil supply groove 11C.
Furthermore, when the main bearing 11 and the washer 12 are brought into contact with each other, an engaging portion formed by a combination of a concave portion and a convex portion may be provided to be firmly engaged by caulking or the like (see FIG. 4).

  In the bearing device 10 according to the present embodiment, a single oil supply hole 11 a that communicates the inner peripheral surface and the outer peripheral surface is opened in the circumferential direction and the substantially central portion in the axial direction of the main bearing 11. Lubricating oil is supplied to the bearing device 10 from a lubricating oil supply unit (not shown), and the lubricating oil is provided in the oil supply hole 11a opened in the main bearing 11 (particularly, the oil supply hole 11a opened in the main bearing 11 of the upper bearing device 10a). ) Through the inner peripheral surface of the main bearing 11.

  Further, in the bearing device 10 according to the present embodiment, as shown in FIGS. 1 and 2, a single oil supply groove 11 b is formed along the axial direction at a substantially central portion in the circumferential direction on the inner peripheral surface of the main bearing 11. ing. In the bearing device 10, the outer surface of the washer 12 (surface opposite to the main bearing 11) has the washer 12 at the same position (substantially central portion in the circumferential direction) as the oil supply groove 11 b in the circumferential direction of the washer 12. A washer oil supply groove (second member oil supply groove) 12a that communicates the inner peripheral end and the outer peripheral end is formed. In other words, an oil supply groove 11 b that guides the lubricating oil supplied to the main bearing 11 to the washer oil supply groove 12 a of the washer 12 is formed on the inner peripheral surface of the main bearing 11.

  With the bearing device 10 configured as described above, the lubricating oil flowing in through the oil supply hole 11a is preferentially introduced into the washer oil supply groove 12a of the washer 12 through the oil supply groove 11b, and then through the washer oil supply groove 12a. The entire outer surface of the washer 12 can be distributed. For this reason, by sufficiently securing the amount of oil supplied to the entire outer peripheral surface of the washer 12, the cooling effect in the bearing device 10 can be improved, and the seizure resistance and fatigue resistance of the bearing device 10 can be improved. Further, since the lubricating oil that has just flowed into the main bearing 11 flows into the outer peripheral surface of the washer 12, fresh lubricating oil can flow into the outer peripheral surface of the washer 12. This enables lubrication with a lubricating oil having a higher viscosity and a lower temperature than when depending on the side flow from the main bearing, improves fatigue resistance and seizure resistance, and improves the load capacity of the washer 12. be able to. In this embodiment, the oil supply groove 11b is formed along the axial direction. However, the oil supply groove 11b is formed on the inner peripheral surface of the main bearing 11 so as to communicate one end side and the other end side in the axial direction. It should be. That is, the oil supply groove 11b can be formed obliquely with respect to the axial direction. Further, as long as the circumferential oil supply groove 11C and the axial end of the main bearing shaft 11 communicate with each other, the one end side and the other end side in the axial direction do not need to communicate with each other in a straight line.

  Further, in the bearing device 10, the oil supply groove 11 b is formed at the same position as the oil supply hole 11 a in the circumferential direction of the main bearing 11 (substantially central portion in the circumferential direction). Thereby, the lubricating oil which flowed in through the oil supply hole 11a can be directly flowed into the outer surface of the washer 12 through the oil supply groove 11b. That is, according to the present embodiment, since the lubricating oil that is not used in the main bearing 11 mainly flows into the outer peripheral surface of the washer 12, the fresher lubricating oil is allowed to flow into the outer peripheral surface of the washer 12. Can do it. The oil supply groove 11b may be formed at a position different from the oil supply hole 11a.

  In the bearing device 10, as shown in FIGS. 1 and 2, the inner peripheral surface of the main bearing 11 has the same position as the oil supply hole 11 a in the axial direction (substantially central portion in the axial direction) along the circumferential direction. A circumferential oil supply groove 11c is formed. The oil supply groove 11b is formed so as to intersect with the circumferential oil supply groove 11c. By the circumferential oil supply groove 11c, the lubricating oil can be smoothly circulated in the circumferential direction on the inner peripheral surface of the main bearing 11. Further, when the oil supply groove 11b is formed at a position different from the oil supply hole 11a, the lubricating oil that has flowed through the oil supply hole 11a can be made to flow into the oil supply groove 11b through the circumferential oil supply groove 11c. As a result, the lubricating oil can flow into the outer surface of the washer 12 via the oil supply groove 11b, and a sufficient amount of oil can be secured to the outer peripheral surface of the washer 12. In addition, although the circumferential direction oil supply groove | channel 11c and the oil supply groove | channel 11b in this embodiment are formed in the substantially same depth as shown in FIG.2 (b), even if either one is formed deeper than the other. There is no problem. That is, the circumferential oil supply groove 11c may be formed deeper than the oil supply groove 11b, or conversely, the oil supply groove 11b may be formed deeper than the circumferential oil supply groove 11c.

  Next, the bearing device 110 according to the second embodiment of the present invention will be described with reference to FIG. In the following embodiments, the description of the same configuration as the bearing device according to the above-described embodiment will be omitted, and a description will be given focusing on a different configuration.

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

  In the bearing device 110 according to the present embodiment, two oil supply holes 111a and 111a communicating the inner peripheral surface and the outer peripheral surface are opened at substantially axially central portions of the main bearing 111 at positions where they are symmetrical in the front-rear direction. Has been. Lubricating oil is supplied to the bearing device 110 from a lubricating oil supply unit (not shown), and this lubricating oil flows into the inner peripheral surface side of the main bearing 111 through oil supply holes 111a and 111a opened in the main bearing 111.

  Further, as shown in FIG. 3, the bearing device 110 according to the present embodiment has two oil supply grooves 111b and 111b along the axial direction at the same positions as the oil supply holes 111a and 111a on the inner peripheral surface of the main bearing 111. Is formed. In the bearing device 110, the lubricating oil flowing in through the oil supply holes 111a and 111a is preferentially supplied to the outer surface of the washer 112 (surface opposite to the main bearing 111) through the oil supply grooves 111b and 111b. be able to. For this reason, by sufficiently securing the amount of oil supplied to the outer peripheral surface of the washer 112, the cooling effect in the bearing device 110 is improved, and the seizure resistance and fatigue resistance of the bearing device 110 can be improved. Further, according to the present embodiment, since the lubricating oil that is not used mainly by the main bearing 111 flows into the outer peripheral surface of the washer 112, fresh lubricating oil can be flowed into the outer peripheral surface of the washer 112. It is.

  Further, in the bearing device 110, as shown in FIG. 3, the inner circumferential surface of the main bearing 111 is circumferentially lubricated along the circumferential direction at the same position (substantially central portion in the axial direction) as the axially lubricated hole 111a. A groove 111c is formed. The oil supply grooves 111b and 111b are formed so as to intersect with the circumferential oil supply groove 111c. The circumferential oil supply groove 111c allows the lubricating oil to smoothly circulate in the circumferential direction on the inner peripheral surface of the main bearing 111.

  In the bearing device 110, as shown in FIG. 3, the outer peripheral end and the outer peripheral end of the washer 112 are disposed on the outer surface of the washer 112 at the same position as the oil supply grooves 111 b and 111 b in the circumferential direction of the washer 112. Two washer oil supply grooves (second member oil supply grooves) 112a and 112a communicating with the portion are formed. In the bearing device 110, the lubricating oil that has flowed into the outer surface of the washer 112 through the oil supply grooves 111b and 111b can be distributed to the entire outer surface of the washer 112 through the washer oil supply grooves 112a and 112a. For this reason, by sufficiently securing the amount of oil supplied to the entire outer peripheral surface of the washer 112, the cooling effect in the bearing device 110 can be improved, and the seizure resistance and fatigue resistance of the bearing device 110 can be improved.

The position and number of the oil supply holes in the above embodiment can be appropriately changed according to the specifications of the engine. In that case, the oil supply groove provided in order to distribute | circulate the lubricating oil supplied to the main bearing 11 to the washer 12 and the said oil supply hole should just be connected.
Further, in the above embodiment, the configuration of the oil supply groove of the present invention is applied to both the upper bearing device and the lower bearing device. However, it may be applied to at least the upper bearing device, and the number of bearing devices is also increased. As in this embodiment, only one set may be used instead of the upper and lower sets.

Next, the bearing apparatus 210 which concerns on 3rd embodiment of this invention is demonstrated using FIG.
Similar to the bearing device 10, the bearing device 110 includes one main bearing 211 as a first member and two washers 212 as second members.

  Three engaging projections 214 projecting inward in the radial direction are formed at the radially inner end of the washer 212. The engaging convex part 214 is formed in a substantially rectangular shape in a side view. In the present embodiment, a total of three engaging projections 214 are formed at the radially inner end of the washer 212, one at the substantially central portion in the circumferential direction and one at each position that is symmetrical in the front-rear direction.

  At both ends of the main bearing 211 in the axial direction, three engaged recesses 213 with which the engagement protrusions 214 are engaged are formed at positions corresponding to the engagement protrusions 214 of the washer 12. In the present embodiment, a total of three engaged recesses 213 are formed at both ends in the axial direction of the main bearing 211, one at the substantially central portion in the circumferential direction and one at each position that is symmetrical in the longitudinal direction. . The engaged concave portion 213 is formed to have a slightly larger circumferential length than the engaging convex portion 214 to the extent that the engaging convex portion 214 can be inserted.

  When the washer 12 is assembled to the main bearing 211, the engaging convex portion 214 of the washer 212 is inserted into the corresponding engaged concave portion 213 in the main bearing 211, as shown in FIG. Then, the engaging convex portion 214 is caulked in a state of being engaged with the engaged concave portion 213. At this time, the washer 212 is not completely fixed to the main bearing 211, but the engaging convex portion 214 is caulked with a slight gap inside the engaged concave portion 213. That is, as shown in FIG. 4, the engaging convex portion 214 is caulked to the extent that it can move in the axial direction in the engaged concave portion 213. This is because the washer 212 and the cylinder block are brought into close contact when the bearing device 210 is assembled to the cylinder block by increasing the degree of freedom regarding the axial displacement of the washer 212.

  In the bearing device 210 according to the present embodiment, three oil supply holes 211a that connect the inner peripheral surface and the outer peripheral surface are opened at a substantially central portion in the axial direction of the main bearing 211 as shown in FIG. ing. Lubricating oil is supplied to the bearing device 210 from a lubricating oil supply unit (not shown), and this lubricating oil flows into the inner peripheral surface side of the main bearing 211 through an oil supply hole 211 a opened in the main bearing 211.

  In the bearing device 210 according to the present embodiment, as shown in FIG. 4, an oil supply groove 111 b is formed along the axial direction at the same position as the central oil supply hole 211 a on the inner peripheral surface of the main bearing 211. In the bearing device 210, the lubricating oil flowing in through the oil supply hole 211a can be preferentially flowed into the outer surface of the washer 212 (surface opposite to the main bearing 211) directly through the oil supply groove 211b. For this reason, by sufficiently securing the amount of oil supplied to the outer peripheral surface of the washer 212, the cooling effect in the bearing device 210 is improved, and the seizure resistance and fatigue resistance of the bearing device 210 can be improved. Further, according to the present embodiment, since the lubricating oil that is not used mainly by the main bearing 211 flows into the outer peripheral surface of the washer 212, fresh lubricating oil can be flowed into the outer peripheral surface of the washer 212. It is.

  In the bearing device 210, as shown in FIG. 4, circumferential lubrication along the circumferential direction is provided on the inner circumferential surface of the main bearing 211 at the same position (substantially central portion in the axial direction) as the axial lubrication hole 211 a. A groove 211c is formed. The oil supply groove 211b is formed so as to intersect with the circumferential oil supply groove 211c. By this circumferential oil supply groove 211c, the lubricating oil can be smoothly circulated in the circumferential direction on the inner peripheral surface of the main bearing 211.

  In the bearing device 210, as shown in FIG. 4, three washer oil supply grooves (second member oil supply channels) communicating the inner peripheral side end and the outer peripheral side end of the washer 212 are formed on the outer surface of the washer 212. Groove) 212a is formed. In the bearing device 210, the lubricating oil that has flowed into the outer surface of the washer 212 through the oil supply groove 211b can be distributed to the entire outer surface of the washer 212 through the washer oil supply groove 212a. For this reason, by sufficiently securing the amount of oil supplied to the entire outer peripheral surface of the washer 212, the cooling effect in the bearing device 210 is improved, and the seizure resistance and fatigue resistance of the bearing device 210 can be improved.

DESCRIPTION OF SYMBOLS 10 Bearing apparatus 11 Main bearing 11a Oil supply hole 11b Oil supply groove 11c Circumferential oil supply groove 12 Washer 12a Washer oil supply groove

Claims (6)

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 perpendicular 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,
On the surface of the second member opposite to the first member, a second member oil supply groove that connects the inner peripheral side end and the outer peripheral side end of the second member is formed,
An oil supply groove for guiding the lubricating oil supplied to the first member to the second member oil supply groove is formed on the inner peripheral surface of the first member. In the inner peripheral surface of the first member, a circumferential oil supply groove is formed along the circumferential direction,
2. The bearing device according to claim 1, wherein the oil supply groove is formed to communicate the circumferential oil supply groove with an axial end of the first member. In the first member, at least one oil supply hole communicating the inner peripheral surface and the outer peripheral surface is opened,
The bearing device according to claim 1, wherein the oil supply groove is formed at the same position as the oil supply hole in the circumferential direction of the first member.   4. The bearing device according to claim 1, wherein the oil supply groove is formed along the axial direction. 5. In the inner peripheral surface of the first member, the circumferential oil supply groove is formed along the circumferential direction at the same position as the oil supply hole in the axial direction of the first member,
The bearing device according to any one of claims 1 to 4, wherein the oil supply groove is formed to intersect with the circumferential oil supply groove.   The bearing device according to any one of claims 1 to 5, wherein the second member oil supply groove is formed at the same position as the oil supply groove in a circumferential direction of the second member. .

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