JPH0512850U - Two wheel link type rear arm dust cover - Google Patents

Abstract

(57) [Summary] [Purpose] Maintaining the anticorrosive power of the metal ring of the dust cover. [Structure] A seal ring holding groove 4 is formed on an outer peripheral portion of a metal ring 2 of a dust cover 1, and a rear arm 11 is provided in the groove.
The seal ring 5 is slidably attached to the outer periphery of the end of the. [Effect] Since the seal ring is not baked on the metal ring, the rust preventive power of the plating or the like applied to the metal ring is not deteriorated by the heat accompanying the baking, and the rust preventive power is maintained.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a dust cover for a two-wheel link type rear arm.

[0002]

[Prior Art]

 As is well known in the art, a collar 12 is inserted through a rotating portion 11 that interlocks with a suspension (not shown) that is a swing center of the two-wheel link type rear arm 10 when the wheels move up and down. A hole 13 is provided, and a collar 12 is inserted through the through hole 13 in a fixed state. A bearing 14 is provided between both ends of the rotating portion 11 of the rear arm 10 and both ends of the collar 12 inserted through the bearing 14. , 14 are interposed so that the rear arm 10 can be swung smoothly. Dust covers 15 and 15 are fixed to the frame at both ends of the rotating portion 11 of the rear arm 10 by bolts 16 and nuts 17 penetrating the inside of the collar 12.

A rubber seal ring 20 having a plurality of lips 19 is adhered to the inner peripheral surface of the metal ring 18 of the dust cover 15 by baking or the like, so that the lip 19 of the seal ring 20 is The sliding portions 21 on both ends of the rotating portion 11 of the rear arm 10 are in sliding contact with the sealing surfaces 21 to prevent leakage of lubricating oil in the bearing 14 and dust.

[0004]

[Problems to be solved by the device]

 The seal ring 20 made of rubber is adhered to the inner peripheral surface of the metal ring 18 of the dust cover 15 of the conventional two-wheel link type rear arm by baking. When the rubber is baked, the temperature of the molding die is about 160 ° C. If the temperature becomes higher than this, the plating applied to the metal ring 18 for rust prevention exceeds the heat resistant temperature of zinc plating, for example, and the rust prevention of the plating applied to the metal ring 18 is exceeded. There is a problem that the force is reduced, and more steps are required for rubber baking, resulting in higher cost.

Therefore, an object of the present invention is to provide a dust cover that does not require a rubber baking step in order to maintain the anticorrosive force of the metal ring of the dust cover of the two-wheel link type rear arm.

[0006]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the dust cover of the two-wheel link type rear arm according to the present invention is provided with a seal ring holding groove in the outer periphery of the metal ring of the dust cover, and the outer periphery of the end of the rear arm is formed in the groove. The feature is that a sliding seal ring is held.

[0007]

[Action]

 The dust cover of the two-wheel link type rear arm according to the present invention has a seal ring holding groove formed in the outer periphery of the metal ring of the dust cover, and holds the seal ring in sliding contact with the outer circumference of the end of the rear arm. As a result, there is no need to bake and bond the seal ring to the metal ring, so there is no risk of the rust-preventing power being reduced by the baking process, and it is possible to reduce the number of manufacturing processes.

[0008]

【Example】

 An embodiment of the present invention will be described with reference to the drawings. The dust cover 1 of the present invention is fixed to both ends of the rotating portion 11 of the two-wheel link type rear arm 10 described above, and the rotating portion of the rear arm 10 described above. It prevents the leakage of the lubricating oil of the bearing 14 interposed between the collar 12 inserted into the bearing 11 and the rotating portion 11 and prevents the dust from the outside from entering the bearing 14. It is a thing.

An O-ring holding groove 4 is formed on the outer peripheral portion 3 of the metal ring 2 of the dust cover 1 of this embodiment by burring and curling. Reference numeral 5 is an O-ring held in the groove 4. In order to fasten the dust cover 1 to both ends of the rotating part 11 of the rear arm 10, the collar 12 is inserted into the through hole 13 of the rotating part 11, and the rotating part of the color arm 12 and the rear arm 10 is inserted. Bearings 14 and 14 are respectively provided at both ends of the dust cover 1 and 11, and the metal rings 2 of the dust cover 1 are brought into contact with the outer sides of these ends, respectively, and the O-ring holding groove 4 of the metal ring 2 of the dust cover 1 is provided. While holding the ring 5, the O-ring 5 is slidably contacted with the sealing surfaces 21 and 21 formed on the outer circumferences of both ends of the rotating portion 11 of the rear arm 10, and the bolts are attached from the outer side of the dust cover 1 on one side. 16 is inserted into the collar 12 so that its tip portion is projected from the other dust cover 1 and the nuts 17 are tightened by the nut 17.

In the dust cover 1 of the present embodiment described above, the O-ring 5 is held in the O-ring holding groove 4 formed in the metal ring 2 and is brought into sliding contact with the seal surfaces on both outer circumferences of the rotating portion 11. Since the metal ring 2 and the O-ring 5 do not require a bonding process such as baking at all, the rust-preventing power of the plating applied to the metal ring 2 is reduced by the heat during molding. Moreover, the number of steps can be reduced, and the cost can be reduced.

In another embodiment shown in FIG. 3, a V-shaped packing 6 is held in the groove 4 of the metal ring 2 instead of the O-ring 5 in the above-mentioned embodiment, and both ends of the rotating portion 11 of the rear arm 10 are held. It is brought into sliding contact with the outer peripheral seal surface, and is the same in operation and effect as the above-mentioned embodiment.

[0012]

[Effect of the device]

 The dust cover of the two-wheeled link type rear arm according to the present invention has a seal ring holding groove formed in the outer periphery of the metal ring of the dust cover, and the seal ring which is slidably contacted with the outer periphery of the end of the rear arm is held in the groove. Since the seal ring does not have to be baked on the metal ring, the number of steps can be reduced, and the anti-corrosion property of the plating can be maintained because baking is not required.

[Brief description of drawings]

FIG. 1 is an explanatory view of mounting a dust cover used for a two-wheel link type rear arm.

FIG. 2 is a sectional view of a main part with a dust cover attached.

FIG. 3 is a sectional view of a main part of another example.

FIG. 4 is a sectional view of a mounting portion of a conventional dust cover.

[Explanation of symbols]

 1 Dust Cover 2 Metal Ring 4 O-ring Holding Groove 5 O-ring 10 Rear Arm 11 Rear Arm Rotating Part 12 Collar 14 Bearing

Claims (1)

[Scope of utility model registration request] 1. A two-wheel-link-type rear arm, wherein a groove for holding a seal ring is formed in an outer peripheral portion of a metal ring of a dust cover, and a seal ring slidably contacting an outer periphery of an end portion of a rear arm is held in the groove. Dust cover.