JP2015132276A - Rolling shaft - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rolling shaft that can secure oil permeating property between the rolling shaft and a rotating body supported by the rolling shaft.SOLUTION: A rolling shaft 10 rotatably supports a rotating body 20 and is formed with a spiral oil permeating groove 12 from one end side to the other end side of the rolling shaft 10 at an outer peripheral surface 11 of the rolling shaft 10.

Description

  The present invention relates to a rolling shaft, and more particularly to a rolling shaft that supports a tappet roller (roller follower) of an engine and a rolling shaft (pinion shaft) that supports a planetary gear.

  As a conventional rolling shaft, one used for a tappet roller bearing structure is known. This tappet roller bearing structure is composed of a rolling shaft (support shaft) and a cylinder fitted to the outer peripheral surface of the rolling shaft. And a cylindrical outer diameter side roller fitted to the outer peripheral surface of the inner diameter side roller (see, for example, Patent Document 1).

JP 2009-030467 A

  However, the rolling shaft described in Patent Document 1 has poor oil permeability between the rolling shaft and the inner diameter side roller, and it has been desired to ensure oil permeability.

  The present invention has been made in view of the above-described circumstances, and an object thereof is to provide a rolling shaft that can ensure oil permeability between the rolling shaft and a rotating body supported by the rolling shaft. There is to do.

The above object of the present invention can be achieved by the following constitution.
(1) A rolling shaft that rotatably supports a rotating body, and a spiral oil passage groove is formed on an outer peripheral surface of the rolling shaft from one end side to the other end side of the rolling shaft. A rolling shaft characterized by
(2) The rolling shaft according to (1), wherein a plurality of oil passage grooves are formed.

  According to the rolling shaft of the present invention, since the spiral oil passage groove is formed on the outer peripheral surface of the rolling shaft from one end side to the other end side of the rolling shaft, the rolling shaft and the rolling shaft are formed. Oil permeability can be ensured between the rotating body and the rotor.

It is principal part sectional drawing explaining the tappet roller bearing by which one Embodiment of the rolling shaft which concerns on this invention was employ | adopted. It is a perspective view of the rolling shaft shown in FIG. It is an expanded view of the outer peripheral surface of the rolling shaft shown in FIG. It is principal part sectional drawing explaining the modification of the tappet roller bearing by which one Embodiment of the rolling shaft which concerns on this invention was employ | adopted. It is principal part sectional drawing explaining the tappet roller bearing by which the modification of one Embodiment of the rolling shaft which concerns on this invention was employ | adopted. It is a perspective view of the rolling shaft shown in FIG.

  Hereinafter, an embodiment of a rolling shaft according to the present invention will be described in detail with reference to the drawings.

  As shown in FIG. 1, the tappet roller bearing in which the present embodiment is adopted includes a rolling shaft 10 that is supported at both ends by a rocker arm 30 and a tappet roller that is fitted to the outer peripheral surface 11 of the rolling shaft 10 ( A rotating body supported by a rolling shaft) 20. In FIG. 1, reference numeral 31 denotes a cam shaft, and 32 denotes a cam.

  In this embodiment, as shown in FIGS. 2 and 3, a spiral oil passage groove 12 is formed on the outer peripheral surface 11 of the rolling shaft 10 from one end side to the other end side of the rolling shaft 10. Has been.

  The oil passage groove 12 is formed in a spiral shape that goes around the outer peripheral surface 11 of the rolling shaft 10 once between the one end and the other end of the rolling shaft 10. Further, the formation position of the oil passage groove 12 can be adjusted by the inclination angle θ of the oil passage groove 12 (see FIG. 3). In order to prevent the contact surface pressure between the rolling shaft 10 and the tappet roller 20 from becoming excessive, the groove width W of the oil passage groove 12 is set to 0.1 mm to 5 mm, for example. However, the groove width W may be set as appropriate according to environmental conditions such as the diameter, length, load load, and temperature of the rolling shaft 10, manufacturing conditions such as processing tools, processing time, and cost, and is particularly limited. There is no.

  The oil passage groove 12 may be formed in a spiral shape that makes one or more rounds of the outer peripheral surface 11 of the rolling shaft 10 between one end and the other end of the rolling shaft 10. Further, it is preferable that the oil passage groove 12 is not formed at a location where the contact surface pressure between the rolling shaft 10 and the tappet roller 20 is maximized. Further, chamfering may be formed at both end edges of the oil passage groove 12.

  As described above, according to the rolling shaft 10 of the present embodiment, the spiral oil passage groove 12 is formed on the outer peripheral surface 11 of the rolling shaft 10 from one end side to the other end side of the rolling shaft 10. Therefore, the lubricating oil flows into the oil passage groove 12, and the oil permeability between the rolling shaft 10 and the tappet roller 20 can be ensured.

  As a modification of the tappet roller bearing of the present embodiment, a plurality of needle rollers 40 may be arranged between the rolling shaft 10 and the tappet roller 20 so as to roll as shown in FIG. In this case, the needle roller 40 rolls on the outer peripheral surface 11 of the rolling shaft 10 as shown in FIG.

  As a modification of the rolling shaft 10 of this embodiment, as shown in FIGS. 5 and 6, two spiral oil passage grooves 12 are formed in parallel on the outer peripheral surface 11 of the rolling shaft 10. It may be. According to this modification, it is possible to further ensure oil permeability between the rolling shaft 10 and the tappet roller 20.

In addition, this invention is not limited to what was illustrated to the said embodiment, In the range which does not deviate from the summary of this invention, it can change suitably.
For example, in the present embodiment, one or two oil passage grooves are formed on the outer peripheral surface of the rolling shaft. However, the present invention is not limited to this, and three or more oil passage grooves are formed on the outer peripheral surface of the rolling shaft. Also good.
Further, in the present embodiment, the case where the present invention is applied to the rolling shaft that supports the tappet roller is illustrated, but the present invention is not limited thereto, and the present invention may be applied to the rolling shaft that supports the planetary gear. .

10 Rolling shaft 11 Outer peripheral surface 12 Oil passage groove 20 Tappet roller (rotating body)
30 Rocker arm 40 Needle roller θ Angle of oil passage groove W Groove width of oil passage groove

Claims (2)

A rolling shaft that rotatably supports the rotating body,
A rolling shaft, wherein a spiral oil passage groove is formed on an outer peripheral surface of the rolling shaft from one end side to the other end side of the rolling shaft.   The rolling shaft according to claim 1, wherein a plurality of the oil passage grooves are formed.

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