JP2015178865A - Slide member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a slide member that can prevent deterioration of lubrication performance between a shaft and a bush by preventing lubricant circulating in a lubrication groove from flowing out to outside the axial direction of the bush through a relief part.SOLUTION: In a bush 10, a blockage part 10b for blocking circulation of lubricant is formed at a place where a lubrication groove 10g and a relief part 10r cross with each other. The blockage part 10b is formed so as to make the lubrication groove 10g gradually shallower as the groove depth of the lubrication groove 10g approaches the relief part 10r, and by making the lubrication groove 10g gradually shallower, circulation of lubricant is blocked by the blockage part 10b.

Description

  The present invention relates to a sliding member technique, and more particularly to a technique for manufacturing a sliding member having excellent lubrication performance.

  Conventionally, in various machines such as construction machines and automobiles, a sliding member such as a slide bearing has been used in order to enable rotation of a shaft inserted into a housing, and a technique related thereto is also disclosed (for example, (See Patent Document 1).

JP 2007-333185 A

  As the sliding member used as described above, a bush that is press-fitted into an idle gear of an engine is known. In such a bush, a lubricating groove is formed in the circumferential direction at a substantially central portion in the axial direction on the inner circumferential surface thereof. Then, the lubricating oil supplied from the housing or the shaft is circulated through the lubricating groove so that the lubricating oil is spread over the entire inner peripheral surface of the bush to lubricate between the shaft and the bush.

  On the other hand, such a bush may be formed into a cylindrical shape by forming both side end portions of the plate-like member into a clinch shape that can be engaged with each other and engaging the clinch shape. In this case, on the inner peripheral surface of the bush, a relief portion having a reduced thickness over the entire axial width is formed in the clinch-shaped engagement portion. This relief prevents the bumps from hitting the shaft and local parts even if climax occurs on the inner surface of the clinch-shaped engaging part under the high temperature bushing environment, causing seizure and fatigue It is prevented from becoming.

  However, according to the bush configured as described above, the lubricating oil flowing through the lubrication groove may flow out to the outside in the axial direction of the bush through the relief portion, and the lubrication performance between the shaft and the bush may deteriorate. .

  In view of the above situation, the present invention suppresses the lubricating oil flowing through the lubricating groove from flowing out to the outside in the axial direction of the bush via the relief portion, thereby improving the lubricating performance between the shaft and the bush. Provided is a sliding member capable of preventing the lowering.

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

  That is, according to the first aspect, the both end portions of the plate-like member are formed in a clinch shape that can be engaged with each other, and the clinch shape is engaged to form a cylindrical shape. A lubricating groove is formed in a substantially central portion in the circumferential direction, and a relief portion having a reduced thickness over the entire axial width is formed on the inner circumferential surface of the clinch-shaped engaging portion. In the sliding member, an obstructing portion that inhibits the flow of the lubricating oil is formed at a location where the lubricating groove and the relief portion intersect.

  According to a second aspect of the present invention, the blocking portion is formed when the groove depth of the lubricating groove becomes shallower as it approaches the relief portion.

  According to a third aspect of the present invention, the blocking portion is formed by providing a blocking wall between the lubricating groove and the relief portion.

  According to a fourth aspect of the present invention, the blocking portion is formed by the groove width of the lubricating groove becoming narrower as it approaches the relief portion.

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

  According to the sliding member according to the present invention, the lubrication oil flowing through the lubrication groove is prevented from flowing out to the outside in the axial direction of the bush through the relief portion, thereby reducing the lubrication performance between the shaft and the bush. Can be prevented.

(A) And (b) is the perspective view and top view which respectively showed the sliding member which concerns on 1st embodiment. (A) is the XX sectional drawing in FIG.1 (b), (b) is the arrow A direction view in Fig.2 (a). (A) is sectional drawing of the sliding member which concerns on 2nd embodiment, (b) is the arrow B direction figure in Fig.3 (a). (A) is sectional drawing of the sliding member which concerns on 3rd embodiment, (b) is the arrow C direction view in Fig.4 (a). (A) is sectional drawing of the sliding member which concerns on 4th embodiment, (b) is the arrow D direction figure in Fig.5 (a). (A) is sectional drawing of the sliding member which concerns on 5th embodiment, (b) is the arrow E direction figure in Fig.6 (a).

First, the bush 10 which is a sliding member which concerns on 1st embodiment of this invention is demonstrated using FIG.1 and FIG.2.
The bush 10 which is a sliding member according to the present embodiment is a slide bearing used to make a shaft inserted into a housing (not shown) rotatable, and the shaft is inserted into the housing while being press-fitted into the housing. It is what is used. The bush 10 is used, for example, as an engine balancer or an idler gear bush that is press-fitted into an idle gear.

  When forming the bush 10 according to the present embodiment, first, a metal plate-like member composed of a lining and a back metal is punched out with a clinch mold, and clinch capable of engaging both side ends of the plate-like member with each other. The shape is formed (engagement projection 11 and engagement recess 12 are formed). Then, the plate-like member is bent to form a cylindrical shape, and the clinch shapes at both ends are engaged as shown in FIG. Specifically, the engaging projections 11 formed on one end side of the plate-like member enter and engage with the engaging recesses 12 formed on the other end side, whereby both side end portions of the plate-like member are engaged. Are joined together. In the present embodiment, the portion of the bush 10 in which the clinch shape constituted by the engaging convex portion 11 and the engaging concave portion 12 is engaged is referred to as an engaging portion 10j.

  As shown in FIGS. 2A and 2B, a lubricating groove 10g is formed in the circumferential direction at a substantially central portion in the axial direction on the inner peripheral surface of the bush 10. The bush 10 has a configuration in which lubricating oil supplied from a housing into which the bush 10 is press-fitted or a shaft inserted into the bush 10 is circulated through the lubricating groove 10g. Thereby, the lubricating oil is spread over the entire inner peripheral surface of the bush 10 to lubricate between the shaft and the bush 10.

  Further, a high rotational load is applied to the engaging portion 10j in the bush 10. For example, when the bush 10 is a balun sachet, it is used at a rotational speed twice that of the engine speed. At this time, the bush 10 becomes a high temperature, and the lining which is the material of the bush 10 and the back metal have different thermal expansion coefficients, so that the swell may be generated on the inner surface side in the engaging portion 10j.

  Therefore, as shown in FIGS. 2A and 2B, the engaging portion 10j on the inner peripheral surface of the bush 10 is formed with a relief portion 10r having a reduced thickness over the entire width in the axial direction. . In the bush 10, the relief portion 10r prevents the bulge from hitting the shaft and the local portion even when the bulge is generated on the inner surface side in the engagement portion 10j under the usage environment of the bush 10 that becomes high temperature. Prevents seizure and fatigue.

  Furthermore, in the bushing 10 according to the present embodiment, as shown in FIGS. 2A and 2B, an inhibition portion 10b that inhibits the flow of the lubricating oil is formed at a location where the lubricating groove 10g and the relief portion 10r intersect. Is done. Specifically, in the present embodiment, the inhibition portion 10b is formed by gradually decreasing the groove depth of the lubricating groove 10g as approaching the relief portion 10r as shown in FIG. In other words, in the bush 10 according to the present embodiment, the groove depth of the lubricating groove 10g is shallow at the inhibition portion 10b. That is, in the inhibition part 10b, the shallow lubricating groove 10g and the relief part 10r are communicated. The lubricating oil 10g gradually becomes shallower, so that the flow of the lubricating oil is hindered by the inhibiting portion 10b.

  According to the bush 10 which concerns on this embodiment, it can suppress that the lubricating oil which distribute | circulates the lubricating groove 10g flows out to the axial direction outer side of the bush 10 via the relief part 10r by comprising as mentioned above. It becomes. That is, it is possible to prevent the lubrication performance between the shaft and the bushing 10 from being deteriorated by the inhibition portion 10b that obstructs the flow of the lubricating oil due to the gradually decreasing lubrication groove 10g.

  Next, the bush 20 which is a sliding member according to the second embodiment of the present invention will be described with reference to FIG. In each embodiment shown below, since it is the structure substantially the same as the bush 10 which concerns on said 1st embodiment, it demonstrates focusing on a mutually different part.

  When the bush 20 according to the present embodiment is formed, the engaging convex portion 21 formed on one end side of the plate-like member is formed on the other end side, like the bush 10 according to the first embodiment. By entering and engaging with the engaging recess 22, both end portions of the plate-like member are joined to form a cylindrical shape. A portion of the bush 20 in which the clinch shape constituted by the engaging convex portion 21 and the engaging concave portion 22 is engaged is referred to as an engaging portion 20j.

  As shown in FIGS. 3A and 3B, a lubricating groove 20 g is formed in the circumferential direction at a substantially central portion in the axial direction on the inner circumferential surface of the bush 20. In addition, the engaging portion 20j of the bush 20 is formed with a relief portion 20r having a reduced thickness over the entire axial width.

  Further, in the bushing 20 according to the present embodiment, as shown in FIGS. 3A and 3B, an inhibiting portion 20b that inhibits the flow of the lubricating oil is formed at a location where the lubricating groove 20g and the relief portion 20r intersect. Is done. Specifically, in the present embodiment, the inhibition portion 20b is formed by providing a blocking wall 20w between the lubricating groove 20g and the relief portion 20r as shown in FIG. In other words, in the bush 20 according to the present embodiment, the groove depth of the lubricating groove 20g is 0 (same surface as other sliding surfaces) in the blocking wall 20w which is the inhibition portion 20b. That is, in the inhibition part 20b, the communication between the lubricating groove 20g and the relief part 20r is blocked by the blocking wall 20w. Then, the flow of the lubricating oil is hindered by the inhibiting portion 20b (blocking wall 20r) that blocks communication between the lubricating groove 20g and the relief portion 20r.

  According to the bush 20 which concerns on this embodiment, it can suppress that the lubricating oil which distribute | circulates the lubricating groove 20g flows out to the axial direction outer side of the bush 20 via the relief part 20r by comprising as mentioned above. It becomes. That is, it is possible to prevent the lubrication performance between the shaft and the bush 20 from being lowered by the inhibition portion 20b that obstructs the flow of the lubricating oil by gradually reducing the lubrication groove 20g.

Next, the bush 30 which is a sliding member according to the third embodiment of the present invention will be described with reference to FIG.
When the bush 30 according to the present embodiment is formed, the engagement convex portion 31 formed on one end side of the plate-like member is formed on the other end side in the same manner as the bush 10 according to the first embodiment. By entering and engaging with the engaging recess 32, both end portions of the plate-like member are joined to form a cylindrical shape. A portion of the bush 30 in which the clinch shape constituted by the engaging convex portion 31 and the engaging concave portion 32 is engaged is referred to as an engaging portion 30j.

  As shown in FIGS. 4A and 4B, a lubricating groove 30 g is formed in the circumferential direction at a substantially central portion in the axial direction on the inner circumferential surface of the bush 30. In addition, the engaging portion 30j of the bush 30 is formed with a relief portion 30r having a reduced thickness over the entire axial width.

  Furthermore, in the bush 30 according to the present embodiment, as shown in FIGS. 4A and 4B, an inhibiting portion 30b that inhibits the flow of the lubricating oil is formed at a location where the lubricating groove 30g and the relief portion 30r intersect. Is done. Specifically, in the present embodiment, the inhibition portion 30b is formed by the depth of the lubrication groove 30g becoming shallower as it approaches the relief portion 30r as shown in FIG. In other words, in the bush 30 according to the present embodiment, the groove depth of the lubricating groove 30g is shallow at the inhibition portion 30b. That is, in the inhibition part 30b, the shallow lubricating groove 30g and the relief part 30r are communicated. Then, the lubricating oil 30g is suddenly shallow, and the flow of the lubricating oil is hindered by the inhibiting portion 30b.

  According to the bush 30 which concerns on this embodiment, it can suppress that the lubricating oil which distribute | circulates the lubricating groove 30g flows out to the axial direction outer side of the bush 30 via the relief part 30r by comprising as mentioned above. It becomes. That is, it is possible to prevent the lubrication performance between the shaft and the bush 30 from being deteriorated by the inhibition portion 30b that obstructs the flow of the lubricating oil by gradually reducing the lubrication groove 30g.

Next, a bush 40 that is a sliding member according to a fourth embodiment of the present invention will be described with reference to FIG.
When forming the bush 40 according to the present embodiment, the engaging convex portion 41 formed on one end side of the plate-like member is formed on the other end side, like the bush 10 according to the first embodiment. By entering and engaging with the engaging recess 42, both end portions of the plate-like member are joined to form a cylindrical shape. A portion of the bush 40 in which the clinch shape constituted by the engaging convex portion 41 and the engaging concave portion 42 is engaged is referred to as an engaging portion 40j.

  As shown in FIGS. 5A and 5B, a lubricating groove 40 g is formed in the circumferential direction at a substantially central portion in the axial direction on the inner circumferential surface of the bush 40. In addition, the engaging portion 40j of the bush 40 is formed with a relief portion 40r having a reduced thickness over the entire axial width.

  Furthermore, in the bushing 40 according to the present embodiment, as shown in FIGS. 5A and 5B, an inhibition portion 40b that inhibits the flow of the lubricating oil is formed at a location where the lubricating groove 40g and the relief portion 40r intersect. Is done. Specifically, in the present embodiment, as shown in FIG. 5A, the inhibition portion 40b suddenly becomes shallower as the groove depth of the lubricating groove 40g approaches the relief portion 40r, and between the lubricating groove 40g and the relief portion 40r. It is formed by providing the blocking wall 40w. In other words, in the bushing 40 according to the present embodiment, the groove depth of the lubricating groove 40g is 0 (same surface as other sliding surfaces) in the blocking wall 40w that is the inhibition portion 40b. That is, in the inhibition part 40b, the communication between the lubricating groove 40g and the relief part 40r is blocked by the blocking wall 40w. Then, the flow of the lubricating oil is hindered by the inhibiting portion 40b (blocking wall 40r) that blocks the communication between the lubricating groove 40g and the relief portion 40r.

  According to the bush 40 according to the present embodiment, it is possible to prevent the lubricating oil flowing through the lubricating groove 40g from flowing out to the outside in the axial direction of the bush 40 through the relief portion 40r by being configured as described above. It becomes. That is, it is possible to prevent the lubrication performance between the shaft and the bushing 40 from being lowered by the inhibition portion 40b that obstructs the flow of the lubricating oil by gradually reducing the lubrication groove 40g.

Next, a bush 50 that is a sliding member according to a fourth embodiment of the present invention will be described with reference to FIG.
When the bush 50 according to the present embodiment is formed, the engaging convex portion 51 formed on one end side of the plate-like member is formed on the other end side, like the bush 10 according to the first embodiment. By entering and engaging with the engaging recess 52, both end portions of the plate-like member are joined to form a cylindrical shape. A portion of the bush 50 in which the clinch shape constituted by the engaging convex portion 51 and the engaging concave portion 52 is engaged is referred to as an engaging portion 50j.

  As shown in FIGS. 6A and 6B, a lubricating groove 50 g is formed in the circumferential direction at a substantially central portion in the axial direction on the inner circumferential surface of the bush 50. In addition, the engaging portion 50j of the bush 50 is formed with a relief portion 50r having a reduced thickness over the entire width in the axial direction.

  Furthermore, in the bushing 50 according to the present embodiment, as shown in FIGS. 6A and 6B, an inhibition portion 50b that inhibits the flow of the lubricating oil is formed at a location where the lubricating groove 50g and the relief portion 50r intersect. Is done. Specifically, in this embodiment, as shown in FIG. 6A, the groove width (length in the axial direction) of the lubricating groove 50g is formed so as to become narrower as it approaches the relief portion 50r, and the inhibition portion 50b is narrowed. It is formed as a part 50n. In other words, in the bush 50 according to the present embodiment, the groove width of the lubricating groove 50g is narrower in the narrow portion 50n that is the inhibition portion 50b as compared with other portions. The lubricating oil 50g is gradually narrowed in the narrow portion 50n so that the flow of the lubricating oil is inhibited by the inhibiting portion 50b.

  According to the bushing 50 according to the present embodiment, by configuring as described above, it is possible to suppress the lubricating oil flowing through the lubricating groove 50g from flowing out to the outside in the axial direction of the bushing 50 through the relief portion 50r. It becomes. That is, it is possible to prevent the lubrication performance between the shaft and the bushing 50 from being lowered by the inhibition portion 50b that obstructs the flow of the lubricating oil by gradually reducing the lubrication groove 50g.

  In the present invention, the “location where the lubrication groove and the relief portion intersect” does not represent only the intersection between the lubrication groove and the relief portion, but the portion from the end of the relief portion to the portion where the clinch shape engages. Represents the position of.

10 bushing 10b obstruction part 10g lubrication groove 10j engagement part 10r relief part 11 engagement convex part (clinch shape)
12 Engaging recess (Clinch shape)

Next, a bush 50 that is a sliding member according to a fifth embodiment of the present invention will be described with reference to FIG.
When the bush 50 according to the present embodiment is formed, the engaging convex portion 51 formed on one end side of the plate-like member is formed on the other end side, like the bush 10 according to the first embodiment. By entering and engaging with the engaging recess 52, both end portions of the plate-like member are joined to form a cylindrical shape. A portion of the bush 50 in which the clinch shape constituted by the engaging convex portion 51 and the engaging concave portion 52 is engaged is referred to as an engaging portion 50j.

Claims (4)

Both ends of the plate-like member are formed in a clinch shape that can be engaged with each other, and the clinch shape is engaged to form a cylindrical shape,
On the inner peripheral surface, a lubricating groove is formed in the circumferential direction in the substantially central portion in the axial direction,
In the inner peripheral surface, the clinch-shaped engagement portion is a sliding member in which a relief portion having a reduced thickness is formed over the entire width in the axial direction,
In the place where the lubrication groove and the relief part intersect, an inhibition part that inhibits the flow of the lubricating oil is formed,
A sliding member characterized by that. The inhibition part is formed by the groove depth of the lubrication groove becoming shallower as it approaches the relief part.
The sliding member according to claim 1, wherein: By providing a blocking wall between the lubrication groove and the relief portion, the inhibition portion is formed,
The sliding member according to claim 1, wherein: The inhibition part is formed by narrowing the groove width of the lubrication groove as it approaches the relief part.
The sliding member according to claim 1, wherein:

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