A braking device comprising: - a brake fluid, - a transmission shaft, - a driving element actuated by the transmission shaft made up by a volumetric pump, - a chamber coaxial to the transmission shaft, in turn comprising: - at least one first cylinder that forms at least one intake cylinder, and - at least one second cylinder, which forms at least one drive cylinder, - at least one recirculation chamber that connects the at least one first cylinder and at least one second cylinder, and - at least one valve, in such a way that the brake fluid, driven by the driving element, circulates through the at least one first cylinder, and at least one second cylinder and the at least one recirculation chamber, such that the progressive actuation of the valve partially or fully prevents the circulation of the brake fluid through the at least one recirculation chamber, thus making the rotation of the driving element harder and, therefore, the rotation of the transmission shaft, thus obtaining the braking of the transmission shaft, characterised in that the breaking device further comprises: - an outer housing and an inner housing, which are fixed coaxially to the transmission shaft via screws, the joining of the housings (8, 9) thus forming the chamber, and - a first disc situated between the at least one first cylinder and the at least one second cylinder and the volumetric pump, which fixes the position of the aforementioned cylinders (34, 12), - a second disc situated between the cylinders (34, 12) and the inner housing, which fixes the position of the cylinders (34, 12) and fits the cylinders (34, 12) into the recirculation chamber, such that between the housings (8, 9) and the first disc and the second disc, a perimeter chamber is created through which a cooling fluid circulates in order to exchange the heat generated by the brake fluid that moves through the at least one first cylinder and at least one second cylinder and the recirculation chamber. - a brake fluid, - a transmission shaft, - a driving element actuated by the transmission shaft made up by a volumetric pump, - a chamber coaxial to the transmission shaft, in turn comprising: - at least one first cylinder that forms at least one intake cylinder, and - at least one second cylinder, which forms at least one drive cylinder, - at least one first cylinder that forms at least one intake cylinder, and - at least one second cylinder, which forms at least one drive cylinder, - at least one recirculation chamber that connects the at least one first cylinder and at least one second cylinder, and - at least one valve, in such a way that the brake fluid, driven by the driving element, circulates through the at least one first cylinder, and at least one second cylinder and the at least one recirculation chamber, such that the progressive actuation of the valve partially or fully prevents the circulation of the brake fluid through the at least one recirculation chamber, thus making the rotation of the driving element harder and, therefore, the rotation of the transmission shaft, thus obtaining the braking of the transmission shaft, characterised in that the breaking device further comprises: - an outer housing and an inner housing, which are fixed coaxially to the transmission shaft via screws, the joining of the housings (8, 9) thus forming the chamber, and - a first disc situated between the at least one first cylinder and the at least one second cylinder and the volumetric pump, which fixes the position of the aforementioned cylinders (34, 12), - a second disc situated between the cylinders (34, 12) and the inner housing, which fixes the position of the cylinders (34, 12) and fits the cylinders (34, 12) into the recirculation chamber, such that between the housings (8, 9) and the first disc and the second disc, a perimeter chamber is created through which a cooling fluid circulates in order to exchange the heat generated by the brake fluid that moves through the at least one first cylinder and at least one second cylinder and the recirculation chamber. - an outer housing and an inner housing, which are fixed coaxially to the transmission shaft via screws, the joining of the housings (8, 9) thus forming the chamber, and - a first disc situated between the at least one first cylinder and the at least one second cylinder and the volumetric pump, which fixes the position of the aforementioned cylinders (34, 12), - a second disc situated between the cylinders (34, 12) and the inner housing, which fixes the position of the cylinders (34, 12) and fits the cylinders (34, 12) into the recirculation chamber, such that between the housings (8, 9) and the first disc and the second disc, a perimeter chamber is created through which a cooling fluid circulates in order to exchange the heat generated by the brake fluid that moves through the at least one first cylinder and at least one second cylinder and the recirculation chamber.