JP6083392B2 - Thrust washer - Google Patents

Description

  The present invention relates to a thrust washer.

  Conventionally, a sliding layer is formed of sintered metal on one side surface of an annular body having a plurality of claw portions on an outer peripheral edge portion, and a plurality of sliding layers extend from the inner peripheral edge portion of the annular body toward the outer peripheral edge portion. A thrust washer in which a lubricating groove is formed is known (for example, see Patent Document 1).

  The claw portion is bent in the axial direction with respect to the annular body, and is engaged with a thrust washer and another member so that the thrust washer and the other member do not rotate relative to each other.

  The lubrication groove is formed in the sliding layer at a location corresponding to the claw portion of the annular body and a location between adjacent claw portions, and feeds oil guided to the inner peripheral edge of the thrust washer to the outer side of the thrust washer. It is supposed to be. The lubrication groove formed at a location corresponding to the claw portion of the annular body is for preventing the sliding layer from cracking from the annular portion when the claw portion is bent.

Japanese Patent Laid-Open No. 2-163514

  However, in the thrust washer described above, oil is fed from the lubrication groove formed at the position corresponding to the claw portion of the annular body in the sliding layer to the engagement portion between the claw portion that does not particularly require lubrication and another member. Therefore, there is a concern that the amount of oil to be supplied to a portion requiring lubrication is insufficient.

  Accordingly, the present invention has been made to solve the above-described problems, and provides a thrust washer capable of ensuring the amount of oil to be supplied to a portion requiring lubrication as compared with the conventional one. It is an object.

  In order to achieve the above object, the thrust washer according to the present invention is (1) a thrust in which a sliding layer is formed of sintered metal on one side surface of a metal washer body having a claw portion on the outer peripheral edge of the annular body. A washer, wherein the sliding layer is cut so that a boundary region between the claw portion and the outer peripheral edge of the annular body and the claw portion is exposed, and the sliding layer is separated from the claw portion in the annular body. The removed predetermined portion is exposed, and is cut out so as to form a lubricating groove extending from the inner peripheral edge portion of the annular body toward the outer peripheral edge portion, and the claw portion is bent in the axial direction with respect to the annular body. It is configured to engage another member.

  In the thrust washer according to the present invention, a predetermined portion that is removed from the claw portion is exposed in the annular body, and the sliding layer is cut so as to form a lubricating groove extending from the inner peripheral edge portion of the annular body toward the outer peripheral edge portion. Yes.

  For this reason, the thrust washer according to the present invention suppresses the supply of oil to the engagement portion between the claw portion and the other member that do not particularly require lubrication, and supplies the oil to a portion requiring lubrication. In addition, since the number of lubricating grooves is limited, the area of the torque transmitting portion of the sliding layer is not reduced, and the relative strength of the sliding layer can be improved.

  Furthermore, the thrust washer according to the present invention has the sliding layer removed so that the boundary region between the claw portion and the outer peripheral edge of the annular body and the claw portion is exposed, and the claw portion is bent in the axial direction with respect to the annular body portion. Therefore, the sliding layer formed in the annular body portion can be prevented from cracking.

  According to the present invention, it is possible to provide a thrust washer that can secure the amount of oil to be supplied to a site that requires lubrication as compared with the conventional one.

It is a front view of the thrust washer concerning the 1st embodiment of the present invention. It is AA sectional drawing of the thrust washer shown in FIG. It is BB sectional drawing of the thrust washer shown in FIG. It is a front view which shows the carrier of the planetary gear mechanism to which the thrust washer concerning the 1st Embodiment of this invention is applied. It is a front view of the thrust washer which concerns on the 2nd Embodiment of this invention.

  Hereinafter, a thrust washer according to an embodiment of the present invention will be described with reference to the drawings.

(First embodiment)
First, the configuration of the thrust washer according to the present embodiment will be described.

  As shown in FIGS. 1 to 4, the thrust washer 1 according to the present embodiment includes a metal washer body 10 and a sliding layer 20 formed on one side surface of the washer body 10.

  The washer main body 10 is made of, for example, a metal capable of obtaining a predetermined mechanical strength such as steel. The washer main body 10 includes an annular body 11 and three claw portions 12 connected to the outer peripheral edge portion of the annular body 11. The claw portions 12 are located at equal intervals in the circumferential direction of the annular body 11.

  The sliding layer 20 is a porous sintered metal formed by sintering from a powder containing bronze powder or the like, has a predetermined pressure resistance, and is a part related to torque transmission. The sliding layer 20 is cut out so that the claw portion 12 is exposed and the boundary region between the outer peripheral edge of the annular body 11 and the claw portion 12 is exposed.

  The sliding layer 20 is cut out so as to expose a predetermined portion of the annular body 11 that is detached from the claw portion 12 and to form a lubricating groove 21 extending from the inner peripheral edge portion of the annular body 11 toward the outer peripheral edge portion. The lubricating groove 21 is positioned between the claw portions 12 adjacent in the circumferential direction.

  As shown in FIG. 2, the claw portion 12 is bent in the axial direction with respect to the annular body 11 so as to protrude to the opposite side of the sliding layer 20. Further, as shown in FIG. 4, the claw portion 12 is adapted to engage with the mounting groove 31 of the carrier 30 constituting the planetary gear mechanism.

  As shown in FIG. 4, the carrier 30 includes a carrier body 32 that surrounds the thrust washer 1 in the circumferential direction. The carrier body 32 is provided with three attachment grooves 31 on the inner peripheral edge so as to correspond to the distance between the claw portions 12 with respect to the circumferential direction of the annular body 11.

  The carrier body 32 rotatably supports three pinion gears 33 that are arranged in the circumferential direction and the like that constitute the planetary gear mechanism via pins 34 that extend in the axial direction. The pinion gear 33 is positioned between the mounting grooves 31 adjacent in the circumferential direction. Therefore, when the claw portion 12 of the annular body 11 is engaged with the mounting groove 31 of the carrier body 32, the lubricating groove 21 of the thrust washer 1 always faces the pinion gear 33.

  The pinion gear 33 meshes with a sun gear (not shown) and meshes with a ring gear (not shown). The sun gear (not shown) is configured to rotate integrally with a shaft member (not shown) inserted through the thrust washer 1, and oil is guided to the inner peripheral edge of the thrust washer 1 as the shaft member rotates. Yes.

  A clutch plate (not shown) is in contact with the sliding layer 20 of the thrust washer 1 so as to rotate integrally with the thrust washer 1.

  Next, the operation of the thrust washer 1 according to the present embodiment will be described.

  In the thrust washer 1 according to the present embodiment, oil guided to the inner peripheral edge of the thrust washer 1 as a shaft member (not shown) rotates, as indicated by arrows in FIG. It is fed to a meshing site with a sun gear (not shown), a meshing site between the pinion gear 33 and the ring gear, a sliding site between the pinion gear 33 and the pin 34, and the like. Further, the thrust washer 1 according to the present embodiment does not feed the oil outward from other than the lubricating groove 21.

  Therefore, the thrust washer 1 according to the present embodiment suppresses the oil supply to the engagement portion between the claw portion 12 and the mounting groove 31 that do not particularly require lubrication, so that the pinion gear 33 and the sun gear (not shown) It is possible to secure the amount of oil supplied to the meshing site, the meshing site between the pinion gear 33 and the ring gear, and the sliding site between the pinion gear 33 and the pin 34.

  In addition, the thrust washer 1 according to the present embodiment limits the number of lubrication grooves 21 of the sliding layer 20 in contact with the clutch plate as compared with the conventional one, so that torque transmission of the sliding layer 20 is achieved. The area of the portion does not decrease, and the relative strength of the sliding layer 20 can be improved.

  Further, in the thrust washer 1 according to the present embodiment, the sliding layer 20 is cut so that the boundary region between the claw portion 12 and the outer peripheral edge of the annular body 11 and the claw portion 12 is exposed, and the claw portion 12 is removed from the annular body 11. However, the sliding layer 20 formed in the annular body 11 can be prevented from cracking because it is bent in the axial direction and engaged with the mounting groove 31.

  The thrust washer 1 according to the present embodiment includes three each of the claw portion 12 and the lubricating groove 21, but the number thereof may be changed as appropriate.

(Second Embodiment)
As shown in FIG. 5, in the thrust washer 1A according to the present embodiment, a sliding layer 20 for torque transmission is formed of a porous sintered metal on one side surface of a metal washer body 10. About each part of thrust washer 1A, about the same thing as thrust washer 1 which concerns on 2nd Embodiment, the code | symbol same as the code | symbol used in FIGS. 1-4 is attached | subjected in FIG. 5, and description is abbreviate | omitted.

  The sliding layer 20 in the thrust washer 1A is cut so that the boundary region between the claw portion 12 and the outer peripheral edge of the annular body 11 and the claw portion 12 is exposed, but the lubricating groove 21 described in the second embodiment. Is not formed.

  Further, the claw portion 12 in the thrust washer 1A is bent in the axial direction with respect to the annular body 11 so as to protrude to the opposite side of the sliding layer 20.

  The thrust washer 1A according to the modified example of the present embodiment cuts the sliding layer 20 so that the boundary region between the claw portion 12 and the outer peripheral edge portion of the annular body 11 and the claw portion 12 is exposed. 11, the sliding layer 20 formed on the annular body 11 can be prevented from cracking.

  The technical scope of the thrust washer according to the present invention is not limited to the above-described embodiment, and includes various modifications of each component described in the claims without departing from the scope of the present invention. It is a waste.

  As described above, the thrust washer according to the present invention can secure the amount of oil to be supplied to a portion requiring lubrication, and the relative strength of the sliding layer can be improved, and the cracking of the sliding layer can be prevented. It is effective for various mechanical devices such as a planetary gear mechanism incorporated in an automatic transmission of a vehicle.

  DESCRIPTION OF SYMBOLS 1 ... Thrust washer, 10 ... Washer main body, 11 ... Ring body, 12 ... Claw part, 20 ... Sliding layer, 21 ... Lubrication groove, 32 ... Carrier main body (another member)

Claims (1)

A thrust washer in which a sliding layer is formed of sintered metal on one side surface of a metal washer body having a claw portion on the outer peripheral edge of the annular body,
The sliding layer is cut so that a boundary region between the claw portion and the outer peripheral edge portion of the annular body and the claw portion is exposed,
The sliding layer is cut out so as to form a lubricating groove extending from the inner peripheral edge of the annular body toward the outer peripheral edge while exposing a predetermined portion of the annular body that is separated from the claw portion.
The thrust washer, wherein the claw portion is configured to bend in the axial direction with respect to the annular body and engage with another member.

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