Multistage transmission gear shift operation device, and vehicle mounted with same

A gear shifting operation device of a multistage transmission that is provided with a main transmission and an auxiliary transmission, and shifts gear stages of both the main transmission and the auxiliary transmission, comprising:

• an operation separating mechanism that separates operation by one shift lever into a shift operation and a select operation;
• a select operation mechanism that operates by the select operation, selects a target shift fork for the main transmission from among a plurality of shift forks for the main transmission, and shifts a shift fork for the auxiliary transmission;
• and
• a shift operation mechanism that operates by the shift operation, and shifts the target shift fork for the main transmission selected by the select operation,
• wherein the select operation mechanism is provided with:
• a unit operating a select mechanism that selects the target shift fork for the main transmission from among the plurality of shift forks for the main transmission, and a unit operating a shift mechanism that shifts the shift fork for the auxiliary transmission, and
• wherein the select operation mechanism is configured to simultaneously actuate the unit operating the select mechanism and the unit operating the shift mechanism so that when the shift fork for the auxiliary transmission is shifted to a gear stage of a high-speed side, the shift fork for the main transmission used for a gear stage of a low-speed side is selected, and when the shift fork for auxiliary transmission is shifted to a gear stage of a low-speed side, the shift fork for the main transmission used for the gear stage of a high-speed side is selected.