JP2010196809A - Shell type needle bearing with seal ring - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a shell type needle bearing with a seal ring, for inexpensively manufacturing a thick seal ring as well. <P>SOLUTION: This shell type needle bearing with the seal ring includes a shell 1 having respectively flange parts 5 and 5 in both end parts and having a raceway surface on an inner peripheral surface or an outer peripheral surface, a cage 3 having a plurality of pockets over in the circumferential direction, a plurality of needles 2 rollingly held in the respective pockets along the raceway surface, and a cylindrical seal ring 4 arranged between an end surface of the cage 3 and the flange parts 5 on the inside or outside of the shell 1. The seal ring is molded by bending a disk-like steel plate by press working. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a shell type needle bearing with a seal ring.

  Conventionally, many slide bearings (bushes) are used in automatic transmissions and engine cranks, but shell-type needle bearings with seal rings are being substituted for bushing seizure countermeasures and lower torque.

  As a shell-type needle bearing with a seal ring, one having a seal ring so as to have the same amount of lubricant penetrating oil as that of a bush is known (for example, see Patent Document 1).

  A conventional shell type needle bearing with a seal ring is shown in FIG. This shell-type needle bearing 100 with a seal ring includes a seal ring 104 that controls the amount of oil penetrating oil in addition to a shell (a flanged outer ring) 101 having a flange 105, a plurality of needles 102, and a cage 103.

JP-A-6-294418

  Incidentally, in the shell-type needle bearing 100 with a seal ring shown in FIG. 2, when the bearing cross-section height h exceeds 2.5 mm, a thick seal ring 104 is used. If such a thick seal ring 104 is manufactured by press working, in addition to poor workability such as processing speed, breakage occurs on the side far from the press, making it difficult to manufacture with high accuracy. . For this reason, a thick seal ring is manufactured by scraping a bar or tube into a seal ring shape by shaving, but there is a problem that the cost of the shaving is higher than that of pressing. .

  The present invention has been made in view of the circumstances as described above, and an object of the present invention is to provide a shell type with a seal ring that can be manufactured with high accuracy and low cost even with a thick seal ring. It is to provide a needle bearing.

In order to achieve the above-described object, a shell type needle bearing with a seal ring according to the present invention is characterized by the following (1).
(1) A shell having flange portions at both ends and a raceway surface on the inner peripheral surface or outer peripheral surface;
A cage having a plurality of pockets in the circumferential direction;
A plurality of needles held in the pockets so as to roll along the raceway surface;
A substantially cylindrical seal ring provided between the end face of the cage and the flange portion on the inside or outside of the shell;
A shell type needle bearing with a seal ring comprising:
The seal ring is a shell-type needle bearing with a seal ring, wherein the seal ring is formed by bending a disk-shaped steel plate by pressing.

  The shell-type needle bearing with seal ring of the present invention is manufactured by pressing a bent steel plate to produce the seal ring by pressing even if the seal ring is thick. The manufacturing cost can be reduced while maintaining high accuracy.

It is sectional drawing of the shell type needle bearing with a seal ring which concerns on one Embodiment of this invention. It is sectional drawing of the conventional shell type needle bearing with a seal ring.

Hereinafter, a shell type needle bearing with a seal ring according to an embodiment of the present invention will be described in detail with reference to the drawings.

  The shell type needle bearing 10 with seal ring is disposed between the gear trains in the automatic transmission, between the gear shaft and the housing, or on the side of the oil pump gear. As shown in FIG. 1, the shell type needle bearing 10 with a seal ring includes a shell (an outer ring with a flange) 1, a plurality of needles 2, a cage 3, and a substantially cylindrical seal ring 4. A shaft (or inner ring member) (not shown) is rotatably supported.

  The shell 1 formed by processing a steel plate by press molding has a raceway surface 1a on the inner peripheral surface and flange portions 5 and 5 at both ends. The cage 3 has a plurality of pockets 3a in the circumferential direction.

  Here, when the cage 3 is made of metal, it is made of steel such as SPCC, S10C, AISI-1010, SCM415, SK5, SUJ2, etc., and is processed by welding cage, press cage, or machining. When the cage 3 is made of a resin, polyamide 46, polyamide 66, PPS (polyphenylene sulfide), or the like can be applied. The polyamide 46 can be used continuously in an environment of 150 ° C., and can be used up to about 170 ° C. instantaneously. Polyamide 66 can be used up to about 120 ° C., and PPS can be used up to 200 ° C. Moreover, 20-30% of glass fibers are mixed in each resin material for strength improvement.

  The needle 2 is rotatably held in each pocket 3a of the retainer 3 so as to be freely rollable along the raceway surface 1a of the shell 1, and both ends thereof are crowned. Yes.

  The seal ring 4 is made of steel such as SPCC, SPCE, SUJ2, and the like, and is provided inside the shell 1 between the end face of the cage 3 on the downstream side of the flow of the lubricating oil and the flange portion 5. By adjusting the clearance between the inner diameter of the seal ring 4 and the outer diameter of the shaft, the amount of lubricating oil penetrating the needle bearing 10 can be controlled. The seal ring 4 may be made of a non-ferrous metal such as copper, a copper-based alloy, aluminum, or an aluminum-based alloy as necessary.

  In the present embodiment, since the shell type needle bearing 10 with a seal ring has a thick structure having a bearing cross-sectional height exceeding 2.5 mm, a thin disk-like shape is formed so that the side surfaces come into contact with each other by pressing. The thick seal ring 4 is formed by bending the steel plate. Since the seal ring 4 is disposed in the needle bearing 10 so that the bent portion is positioned on the cage 3 side, the lubricating oil that penetrates the needle bearing 10 without the edge of the steel plate affecting the cage 3. It is possible to control the amount of. By forming the seal ring 4 using the bent steel plate in this way, it becomes possible to manufacture a high-accuracy seal ring at a low cost by pressing without using an expensive cutting process.

  In the present embodiment, the hardness of the seal ring 4 is about HV 90 to 115, and the surface roughness Ra of the inner diameter surface of the seal ring 4 is about 0.1 to 1.6 μm, for example. If the surface roughness Ra of the inner diameter surface of the seal ring 4 is excessive, there is a risk of attacking the mating member and causing abnormal wear or adhesion. In this embodiment, however, abnormalities are caused by setting the surface roughness as described above. Abrasion and adhesion can be prevented.

  In addition, this invention is not limited to embodiment mentioned above, A deformation | transformation, improvement, etc. are possible suitably. For example, the bent portion of the seal ring 4 may be appropriately disposed on the flange portion 5 side. In the above-described embodiment, the seal ring 4 is not subjected to heat treatment. However, heat treatment such as nitriding treatment may be appropriately performed.

  In the above-described embodiment, the outer ring shell 1 having the raceway surface 1a on the inner peripheral surface and the inward flange portions 5 and 5 on both ends is used. You may use the inner ring | wheel shell which each has a direction flange part. In this case, the seal ring is provided outside the shell and between the end face of the cage and the outward flange portion.

10 Shell Type Needle Bearing with Seal Ring 1 Shell 1a Raceway Surface 2 Needle 3 Cage 3a Pocket 4 Seal Ring 5 Flange

Claims (1)

A shell having flange portions at both ends and a raceway surface on the inner or outer peripheral surface;
A cage having a plurality of pockets in the circumferential direction;
A plurality of needles held in the pockets so as to roll along the raceway surface;
A substantially cylindrical seal ring provided between the end face of the cage and the flange portion on the inside or outside of the shell;
A shell type needle bearing with a seal ring comprising:
The seal ring is a shell-type needle bearing with a seal ring, wherein the seal ring is formed by bending a disk-shaped steel plate by pressing.

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