Axle driving apparatus with variable volume reservoir chamber
AssigneeKanzaki Kokyukoki Mfg. Co., Ltd.
InventorHideaki Okada
Life of this patent
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Abstract
An axle driving apparatus in which an oil sump provided in a housing is vertically partitioned into first and second chambers by partition means constructed in the housing. The first chamber is constructed to have an air layer open to the atmosphere, the second chamber is constructed to be always filled with oil. The first chamber and second chamber can flow oil therebetween through an oil introduction passage of the partition means. When oil volume expands by the temperature during the operation of a hydrostatic transmission, while reducing the volume of the air layer in the first chamber, the oil in the second chamber adjustably flows into the first chamber.
Claims5
An axle driving apparatus comprising:
- a housing;
- a hydrostatic transmission disposed within said housing;
- an axle disposed within said housing connected to said hydrostatic transmission;
- an oil sump defined by said housing for storing operating oil for said hydrostatic transmission;
- partition means for separating said oil sump into a first oil chamber and a second oil chamber, said partition means including an oil passage so that said first and said second oil chambers are in fluid communication;
- and
- an air layer formed in said first oil chamber in communication with the atmosphere so that when a volume of oil in said second oil chamber increases, oil flows from said second oil chamber into said first oil chamber thereby decreasing the volume of said air layer.
Dependencies are inferred from the claim text.