Abstract: An electric tightening head for tightening a lock nut of a single through shaft, comprising a supporting plate (1), sliding blocks (2), tightening jaws (3), springs (4), wedged pad irons (5), wedged pad iron connecting arms (6), a pulling rod (7), an initial position detecting bolt (8) and stop bolts (9), wherein the supporting plate (1) is connected with the sliding blocks (2), the tightening jaws (3) and the pulling rod (7); the springs (4) are connected with the stop bolts (9) mounted on the tightening jaws (3); the tightening jaws (3) are connected with the wedged pad irons (5); the wedged pad irons (5) are connected with the wedged pad iron connecting arms (6); and an upper end of the pulling rod (7) is connected with the initial position detecting bolt (8).

Abstract: A single-shaft yaw electric bolt-tightening machine, comprising a base (1), a bracket (2), an electric tightening shaft assembly (14), a sleeve (15), a reaction force supporting board (16), a dedicated sleeve (17), a reaction force sleeve (18), a servomotor (19), a torque sensor (20), an angle sensor (21) and a connecting shaft (22). The bracket (2) is fixed on the base (1) and is provided with a rotary servomotor (3) and an encoder (4). The rotary servomotor (3) is connected with an output shaft (5) which is provided with a small pulley (6). The small pulley (6) is fitted with a big pulley (8) by a toothed belt (7). The big pulley (8) is connected with a rotating shaft (9). A guide rod (12) is connected with a rotating arm (10) by a shaft sleeve (11) and is fixed on a cover-plate bracket (13) in which the electric tightening shaft assembly (14) is fixed.

Abstract: A piston fuel injector detecting device, comprising a base (1), a perspective platform (2), an observation cover (3), a sliding groove (4), an adjusting handle (5), a conducting wire column (6), a supporting plate (7), a tact switch (8), a limit plate (9), an infrared-ray emitting tube (10), an illuminating device (11) and a positioning pin (12), wherein the base (1) is connected with the perspective platform (2) and the positioning pin (12); the perspective platform (2) is connected with the observation cover (3) which is provided with the sliding groove (4); the adjusting handle (5) is connected with the observation cover (3); the conducting wire column (6) is vertically connected with the base (1) and is connected with the supporting plate (7) which is provided with the tact switch (8); the conducting wire column (6) is connected with the limit plate (9) which is connected with the infrared-ray emitting tube (10) and the illuminating device (11).

Abstract: A piston fuel injector detecting device, comprising a base (1), a perspective platform (2), an observation cover (3), a sliding groove (4), an adjusting handle (5), a conducting wire column (6), a supporting plate (7), a tact switch (8), a limit plate (9), an infrared-ray emitting tube (10), an illuminating device (11) and a positioning pin (12), wherein the base (1) is connected with the perspective platform (2) and the positioning pin (12); the perspective platform (2) is connected with the observation cover (3) which is provided with the sliding groove (4); the adjusting handle (5) is connected with the observation cover (3); the conducting wire column (6) is vertically connected with the base (1) and is connected with the supporting plate (7) which is provided with the tact switch (8); the conducting wire column (6) is connected with the limit plate (9) which is connected with the infrared-ray emitting tube (10) and the illuminating device (11).

Abstract: An electric tightening head for tightening a lock nut of a single through shaft, comprising a supporting plate (1), sliding blocks (2), tightening jaws (3), springs (4), wedged pad irons (5), wedged pad iron connecting arms (6), a pulling rod (7), an initial position detecting bolt (8) and stop bolts (9), wherein the supporting plate (1) is connected with the sliding blocks (2), the tightening jaws (3) and the pulling rod (7); the springs (4) are connected with the stop bolts (9) mounted on the tightening jaws (3); the tightening jaws (3) are connected with the wedged pad irons (5); the wedged pad irons (5) are connected with the wedged pad iron connecting arms (6); and an upper end of the pulling rod (7) is connected with the initial position detecting bolt (8). The beneficial effects of the electric tightening head include simple and convenient operation and high tightening precision, and it meets the process requirements, improves the production efficiency and reduces the labor cost.

Abstract: A double-shaft variable propeller pitch electric bolt-tightening machine, comprising: a base body front end (1), a base body rear end (2), a servomotor (3), a servo rotating table (4), a servo feeding table (5), a pneumatic device (6), a main machine base (7), a lifter (8), a lift adjusting guide rod (9), a plurality of supporting rods (10), a lift platform (11), an angle adjusting meter (12), a bearing platform (13), a rotary servomotor (14), an output rotating shaft (15), a centring device (16), a rotating arm (17), a sliding lead screw (18), a tightening servomotor (19), and an automatic nut-identification and reaction force device (20). The present invention has the advantages of simple operation, high tightening precision, uniform pressing force, time-and-labor saving, low noise and no vibration. The present invention can tighten diagonal bolts on a variable propeller pitch device simultaneously and ensure the mounting precision of the variable propeller pitch device without deforming.

Abstract: A single-shaft yaw electric bolt-tightening machine, comprising a base (1), a bracket (2), an electric tightening shaft assembly (14), a sleeve (15), a reaction force supporting board (16), a dedicated sleeve (17), a reaction force sleeve (18), a servomotor (19), a torque sensor (20), an angle sensor (21) and a connecting shaft (22). The bracket (2) is fixed on the base (1) and is provided with a rotary servomotor (3) and an encoder (4). The rotary servomotor (3) is connected with an output shaft (5) which is provided with a small pulley (6). The small pulley (6) is fitted with a big pulley (8) by a toothed belt (7). The big pulley (8) is connected with a rotating shaft (9). A guide rod (12) is connected with a rotating arm (10) by a shaft sleeve (11) and is fixed on a cover-plate bracket (13) in which the electric tightening shaft assembly (14) is fixed.