Modular linear actuator and height adjustable desk

A modular linear actuator comprising:

• an actuator body module, a motor box module, and an end plate,
• wherein the motor box module comprises:
• a motor box;
• a motor;
• and a transmission device, wherein both the motor and the transmission device are mounted within the motor box,
• wherein the motor box module is, via a bottom side of the motor box module, directly detachably mounted on and in physical contact with a first side of the end plate through a buckle structure in a direction of linear actions of the actuator body module, and an end portion of the actuator body module is mounted on a second side of the end plate, the motor box module outputting a power of the motor to the actuator body module by the transmission device to drive the actuator body module to perform linear actions, wherein the buckle structure is formed by a bulging buckle positioned on the bottom side of the motor box module and a buckle hole positioned on the first side of the end plate,
• wherein the motor box module includes a first motor box module that is replaceable manually with a second motor box module having a different motor box module configuration, wherein the actuator body module includes a first actuator body module that is replaceable manually with a second actuator body module having a different actuator body module configuration, wherein:
• the end plate is equipped with an assembly structure that extends horizontally outwards beyond the end portion of the actuator body module,
• the assembly structure includes two side portions located outside of the motor box module and arranged parallel to the end plate,
• each of the two side portions is configured to support a height adjustable desk frame, and
• the assembly structure forms a trench on the first side of the end plate for housing the motor box.