Hydraulic transmission assembly

A hydraulic transmission assembly comprising:

• a hydraulic transmission configured to perform speed-shift with respect to power generated by an engine using a pump and a motor;
• a pump shaft connected to the pump;
• a motor shaft connected to the motor and rotated by power transmitted from the motor;
• a sub-speed-shift shaft connected to at least one of the pump shaft and the motor shaft through a plurality of speed-shift gears;
• a mounting main body in which a mounting space is formed to install the hydraulic transmission;
• a speed-shift case in which an accommodation space is formed to accommodate the sub-speed-shift shaft and which is coupled to the mounting main body;
• and
• a cover part coupled to the mounting main body to cover the hydraulic transmission installed in the mounting space,
• wherein the cover part is coupled to the mounting main body so that at least a portion thereof is accommodated in the mounting space and provides support to one side of the sub-speed-shift shaft,
• wherein the cover part comprises a cover body coupled to the mounting main body,
• wherein the cover body comprises a coupling plate coupled to the mounting main body, and a support member which is coupled to the coupling plate and supports the sub-speed-shift shaft,
• wherein the mounting main body comprises a coupling surface to be coupled to the speed-shift case,
• wherein the support member is formed to protrude from the coupling plate in a backward direction, in which the mounting main body faces the speed-shift case,
• wherein the support member is disposed in the backward direction with respect to the coupling surface so that the support member is inserted into the accommodation space.