Crawler, crawler pin, crawler bush, and crawler manufacturing method
AssigneeKomatsu Ltd.
InventorTakemori Takayama
Life of this patent
Estimating the term…
Abstract
A crawler having a crawler pin and a crawler bush having lubrication between the crawler pin and the crawler bush without lowering the strength of the crawler at the running time, thereby to prevent the creak or seizure, as might otherwise be caused at the running time. A metallic sliding member having an excellent wear resistance can be arranged in the clearance between the crawler bush and the crawler pin. The metallic sliding member can be capable of holding lubricating oil and/or a lubricant. In addition, the clearance between the core bush and the crawler pin can be narrowed, so that the resulting structure retains the imbalance load on both the crawler bush and the crawler pin.
Claims22
A crawler comprising:
- a cylindrical crawler bush surface-hardened on its outer circumference or on its outer circumference and its inner circumference;
- a crawler pin arranged on the inner circumference of said crawler bush;
- and a metal member formed of at least one layer arranged between the clearance formed between said crawler bush and said crawler pin,
- wherein said at least one layer of said metal member is a metallic sliding member having a structure capable of holding lubricating oil and/or a lubricant.
A multi-layered crawler pin constructing a crawler including:
- a cylindrical crawler bush surface-hardened on its outer circumference or on its outer circumference and its inner circumference;
- a crawler pin arranged on the inner circumference of said crawler bush;
- and a metal member formed of at least one layer arranged between the clearance formed between said crawler bush and said crawler pin, said at least one layer of said metal member being a metallic sliding member having a structure capable of holding lubricating oil and/or a lubricant,
- wherein the metallic sliding member having a structure, in which at least its outer circumference is hardened to HRC50 or higher and which has at least one layer on its outer circumference for storing lubricating oil and/or a lubricant, is integrated by caulking, press-fitting or adhering it.
A multi-layered crawler bush constructing a crawler including:
- a cylindrical crawler bush surface-hardened on its outer circumference or on its outer circumference and its inner circumference;
- a crawler pin arranged on the inner circumference of said crawler bush;
- and a metal member formed of at least one layer arranged between the clearance formed between said crawler bush and said crawler pin, said at least one layer of said metal member being a metallic sliding member having a structure capable of holding lubricating oil and/or a lubricant, wherein the metallic sliding member having a structure, in which at least its outer circumference is hardened to HRC50 or higher and which has at least one layer on its inner circumference for storing lubricating oil and/or a lubricant, is integrated by caulking, press-fitting or adhering it.
A method for manufacturing a crawler including:
- a cylindrical crawler bush surface-hardened on its outer circumference or on its outer circumference and its inner circumference;
- a crawler pin arranged on the inner circumference of said crawler bush;
- and a metal member formed of at least one layer arranged between the clearance formed between said crawler bush and said crawler pin, said at least one layer of said metal member being a metallic sliding member having a structure capable of holding lubricating oil and/or a lubricant,
- wherein the metallic sliding member having a structure, in which at least the outer circumference of said crawler bush is hardened to HRC50 or higher, or in which the range of the surfaces of the two end faces within a range of a distance of one half or more of the thickness from the outer circumference is hardened to HRC50 or higher, is integrated on the inner circumference of said crawler bush by caulking, press-fitting or adhering it.
Dependencies are inferred from the claim text.