A throttle valve comprising: a valve body ; an intake duct , which is obtained in the valve body ; a throttle plate , which is arranged in the intake duct ; a shaft , which is mounted so as to rotate in the valve body and supports the throttle plate ; an electric motor ; a gear transmission , which couples the electric motor to the shaft and comprises an end gear , which is integral with the shaft ; a return spring , which is designed to rotate the throttle plate towards a closing position; a striking element , which is obtained in the valve body and establishes an intermediate position of partial opening; and a countering spring , which is fitted on the end gear , is designed to rotate the throttle plate towards an opening position and up to the intermediate position, and has a first end , which is designed to rest against the striking element during the rotation of the end gear ; wherein the end gear comprises at least one coupling element , which is designed to rest against the first end of the countering spring ; the throttle valve is characterised in that: the end gear comprises a main component , which supports the countering spring and an additional component , which is coupled to the main component and supports the coupling element ; the additional component is heat-welded to the main component so as to prevent the rotation between the two components ; and the main component is shaped so as to enable a rotation between the two components before the two components are heat-welded. a valve body ; an intake duct , which is obtained in the valve body ; a throttle plate , which is arranged in the intake duct ; a shaft , which is mounted so as to rotate in the valve body and supports the throttle plate ; an electric motor ; a gear transmission , which couples the electric motor to the shaft and comprises an end gear , which is integral with the shaft ; a return spring , which is designed to rotate the throttle plate towards a closing position; a striking element , which is obtained in the valve body and establishes an intermediate position of partial opening; and a countering spring , which is fitted on the end gear , is designed to rotate the throttle plate towards an opening position and up to the intermediate position, and has a first end , which is designed to rest against the striking element during the rotation of the end gear ; wherein the end gear comprises at least one coupling element , which is designed to rest against the first end of the countering spring ; the throttle valve is characterised in that: the end gear comprises a main component , which supports the countering spring and an additional component , which is coupled to the main component and supports the coupling element ; the additional component is heat-welded to the main component so as to prevent the rotation between the two components ; and the main component is shaped so as to enable a rotation between the two components before the two components are heat-welded. the end gear comprises a main component , which supports the countering spring and an additional component , which is coupled to the main component and supports the coupling element ; the additional component is heat-welded to the main component so as to prevent the rotation between the two components ; and the main component is shaped so as to enable a rotation between the two components before the two components are heat-welded. <EOS>