A kind of gear chamber structure of diesel engine
Technical field
The present invention relates to a kind of train of gearings and gear chamber structure of diesel engine, belong to the engine power assembly field.
Background technique
In prior art, gear chamber has partly comprised the train of gearings of each system's transmission in the motor, guarantees the proper functioning of motor.The direct driving machine oil pump gear of crankshaft timing gear drives water pump gear, fuel injection pump gear and camshaft gear wheel respectively by several idle gears simultaneously in the train of gearings.By certain gear ratio between the gear, guaranteed the harmonious work of cooling system, oil-fired system and the distribution device of motor.The layout of train of gearings directly has influence on the function of other parts of gear chamber and uses, the whole engine structure more complicated that also seems.
Summary of the invention
The objective of the invention is to overcome above-mentioned deficiency, thereby provide a kind of gear chamber structure of diesel engine, this kind structure can be simplified the general structure of motor, the replacing that realizes fuel injection pump gear, camshaft gear wheel is convenient, be convenient to the adjusting of fuel supply advance angle and the check and correction of engine tope center simultaneously, noise and vibrations in the lubricated and reduction gear chamber of gear.
According to technological scheme provided by the invention, a kind of gear chamber structure of diesel engine comprises gear chamber base plate, train of gearings, gear chamber cover, cylinder head, body, feature is: the gear chamber base plate is connected with body and cylinder head, train of gearings is arranged in the front end of gear chamber base plate by the hole on the gear chamber base plate, and gear chamber cover covers train of gearings and is locked on the gear chamber base plate.
Be furnished with crankshaft timing gear, oil pump gear, camshaft gear wheel, first idle gear, water pump gear, second idle gear, the 3rd idle gear, the 4th idle gear, fuel injection pump gear in the described train of gearings; Described oil pump gear, camshaft gear wheel, water pump gear, fuel injection pump gear respectively by the axle installing and locating in the hole of gear chamber base plate; Described crankshaft timing gear upper end is provided with second idle gear, the 3rd idle gear, and crankshaft timing gear, second idle gear, the 3rd idle gear are installed in the hole of gear chamber base plate by axle; Second idle gear, the 3rd idle gear two gears are the double-layer gear of the coaxial running that is installed together; Described first idle gear, the 4th idle gear pass the gear chamber base plate by the aperture on the idle gear fitting seat and are fixed by bolts on body and the cylinder head; Crankshaft timing gear meshes with oil pump gear, second idle gear respectively; Second idle gear and water pump gear engagement; The 3rd idle gear meshes with the 4th idle gear, first idle gear respectively; The 4th idle gear and fuel injection pump gear engagement; First idle gear and camshaft gear wheel engagement.
Described gear chamber base plate is provided with four macropores and two apertures, and four macropores are used for installing and locating oil pump gear, camshaft gear wheel, water pump gear, fuel injection pump gear; Described two apertures are used for installing and locating crankshaft timing gear, the 3rd idle gear, second idle gear.
Described gear chamber cover is provided with camshaft gear wheel hole, fuel injection pump gear hole and crankshaft gear and stretches out the hole." D " shape hole is arranged in described fuel injection pump gear hole, and the one side in hole is for to stretch out the concentric arc structure in hole with crankshaft timing gear.
Described gear chamber cover and water pump gear concentric position place are furnished with the arc groove structure, and are provided with 3 round platforms concentric with the water pump mounting hole in arc groove edge, are respectively arranged with a straight line stiffening rib concentric with water pump gear on each round platform.
Described gear chamber cover is provided with fan supporting base mounting hole place, and the outside of each fan supporting base mounting hole is provided with stiffening rib, and the inside at fan fitting seat mounting hole place is provided with the annulus muscle.
Described gear chamber cover is provided with charging generator support fitting seat hole, and described charging generator support fitting seat is provided with two straight line muscle and a diagonal bar near the hole.
Camshaft gear wheel cover plate and fuel injection pump gear cover plate are installed on the described gear chamber cover, are furnished with stiffening rib near the fitting seat on camshaft gear wheel cover plate and the fuel injection pump gear cover plate front with the equidistant projection of profile; The stiffening rib that described camshaft gear wheel cover plate and fuel injection pump gear cover plate reverse side are furnished with two donut muscle and disperse to each cover plate mounting hole from middle annulus muscle.
Described gear chamber cover internal placement has the netted stiffening rib of triangle.
The leftward position place of described gear chamber cover is provided with phase detector hole, vent and B/P EGR Back Pressure Transducer EGR hole; The phase detector hole is arranged on the camshaft gear wheel horizontal axis position; Vent communicates the interior gas of interior gas of crankcase and valve mechanism cover; The B/P EGR Back Pressure Transducer EGR hole is for detecting the negative pressure in the crankcase.
Compared with the prior art the present invention has the following advantages:
The present invention is simple in structure, compact, reasonable, practical; Owing on gear chamber cover, increased more function of use, simplified the general structure of motor, make things convenient for the replacing of fuel injection pump gear, camshaft gear wheel, be convenient to the adjusting of fuel supply advance angle and the check and correction of engine tope center, increased the intensity of gear chamber cover, gear noise and the external vibration of train of gearings in the gear chamber have been reduced, for the complete machine regular maintenance is provided convenience.
Description of drawings:
Fig. 1 is the structural representation of train of gearings of the present invention and gear chamber.
Fig. 2 arranges schematic representation for gear structure of the present invention.
Fig. 3 is a gear base plate schematic representation of the present invention.
Fig. 4 is a gear chamber cover front-end architecture schematic representation of the present invention.
Fig. 5 is gear chamber cover of the present invention, camshaft gear wheel cover plate and fuel injection pump gear cover plate Facad structure schematic representation.
Fig. 6 is gear chamber cover of the present invention, camshaft gear wheel cover plate and fuel injection pump gear cover plate internal structure schematic representation.
Fig. 7 is that gear chamber cover A of the present invention is to structural representation.
Embodiment:
Embodiment during following the present invention incites somebody to action in conjunction with the accompanying drawings is further described:
Enforcement during following the present invention incites somebody to action in conjunction with the accompanying drawings is further described:
As Fig. 1~shown in Figure 7, comprise gear chamber base plate 1, train of gearings 2, gear chamber cover 3, O-ring seals 4, camshaft gear wheel cover plate 5, fuel injection pump gear cover plate pad 6, fuel injection pump gear cover plate 7, bent axle Front oil seal 8, body 10, cylinder head 9, tracheae 11, charging generator 12, oil pump 13 etc.Train of gearings 2 mainly is made up of crankshaft timing gear 2a, oil pump gear 2b, camshaft gear wheel 2c, the first idle gear 2d, water pump gear 2e, the second idle gear 2f, the 3rd idle gear 2g, the 4th idle gear 2h, fuel injection pump gear 2i.
The present invention adopts gear chamber cover 3 to cover train of gearings 2 and is locked on the gear chamber base plate 1, and the part bolt hole passes the gear chamber base plate and is locked on body 10 and the cylinder head 9.The sealing of train of gearings 2 is guaranteed by the attachment face of gear chamber cover 3 and the finish surface of gear chamber base plate 1; Camshaft gear wheel cover plate 5 is provided with O shape circle 4, and fuel injection pump gear cover plate 7 is provided with fuel injection pump gear cover plate pad 6, and crankshaft timing gear 2a place is provided with bent axle Front oil seal 8, and lubricant oil flows in the oil sump from the lower end of gear chamber cover 3.
As shown in Figure 2, be furnished with crankshaft timing gear 2a, oil pump gear 2b, camshaft gear wheel 2c, the first idle gear 2d, water pump gear 2e, the second idle gear 2f, the 3rd idle gear 2g, the 4th idle gear 2h, fuel injection pump gear 2i in the described train of gearings 2; Four macropores are used for installing and locating oil pump gear 2b, camshaft gear wheel 2c, water pump gear 2e, fuel injection pump gear 2i on the described gear chamber base plate 1, and said gear is installed in the hole on the gear chamber base plate 1 by axle.Two apertures are used for installing and locating crankshaft timing gear 2a, the 3rd idle gear 2g, the second idle gear 2f on the described gear chamber base plate 1, crankshaft timing gear 2a upper end is provided with the second idle gear 2f, the 3rd idle gear 2g, and the second idle gear 2f, the 3rd idle gear 2g are installed in the hole on the gear chamber base plate 1 by axle; Two gears are the double-layer gear of the coaxial running that is installed together.The described first idle gear 2d, the 4th idle gear 2h pass gear chamber base plate 1 usefulness bolt by the aperture on the idle gear fitting seat and have been locked on body 10 and the cylinder head 9; Crankshaft timing gear 2a meshes with oil pump gear 2b, the second idle gear 2f respectively; The second idle gear 2f and water pump gear 2e engagement; The 3rd idle gear 2g meshes with the 4th idle gear 2h, the first idle gear 2d respectively; The 4th idle gear 2h and fuel injection pump gear 2i engagement; The first idle gear 2d and camshaft gear wheel 2c engagement.The second idle gear 2f drives water pump gear 2e, and the 3rd idle gear 2g has driven camshaft gear wheel 2c and fuel injection pump gear 2i by the secondary transmission of the first idle gear 2d and the 4th idle gear 2h.The setting of the first idle gear 2d and the 4th idle gear 2h has made things convenient for the back lash adjustment of camshaft gear wheel 2c and fuel injection pump gear 2i and the peripheral matched part of complete machine to arrange.
As shown in Figure 3, gear chamber base plate 1 is directly installed on body 10 and the cylinder head 9, and two aperture 1a and 4 macropore 1b are set on the gear chamber base plate, has made things convenient for the location of gear to reach lubricated; The profile of gear chamber base plate 1 adopts irregular structure, has made things convenient for complete machine to arrange suction tude 11 charging generators 12, oil pump 13 etc.
As shown in Figure 4, gear chamber cover 3 is provided with 3 macropores: camshaft gear wheel hole 3a, fuel injection pump gear hole 3b and crankshaft gear stretch out hole 3c.Camshaft gear wheel hole 3a and fuel injection pump gear hole 3b have made things convenient for the adjustment of the timing pairing mark 1c of the maintenance of gear and motor, and have made things convenient for the replacing of camshaft gear wheel 2c and Injection Pump or fuel injection pump gear 2i.Fuel injection pump gear hole 3b is arranged to " D " shape hole, and the one side in hole makes fuel injection pump gear hole 3b and crankshaft gear stretch out being connected between the 3c of hole and widens for to stretch out the concentric arc structure 3d in hole with crankshaft timing gear 2a, has improved the intensity of gear chamber cover 3.
Shown in Fig. 5~6, gear chamber cover 3 charging pump gear 2e concentric position places, arranged bigger arc groove structure 3e, and be provided with 3 the round platform 3is concentric at the recess edge place with the water pump mounting hole, be provided with a straight line stiffening rib 3j concentric on each round platform respectively, avoided occurring bigger plane herein with water pump gear 2e; At the fan supporting base mounting hole 3f of place, the outside of each fan supporting base mounting hole is provided with the stiffening rib that is close with fan fitting seat profile, the inside of the fan fitting seat mounting hole 3f of place is provided with a big annulus muscle, and be provided with from the edge of annulus muscle the concentrically fanned stiffening rib that connects to the fan base mounting hole; Also be provided with two straight line muscle and a diagonal bar 3g near the charging generator support fitting seat hole 3h; Camshaft gear wheel cover plate 5, fuel injection pump gear cover plate 7 are installed on the gear chamber cover 3, arranged near the fitting seat on the two cover plate fronts and stiffening rib 5a, the 7a of the equidistant projection of profile that reverse side has been arranged two donut muscle and the stiffening rib 5b, the 7b that disperse to each cover plate mounting hole from middle annulus muscle; Gear chamber cover 3a internal placement the netted reinforcing rib 3k that links to each other respectively of each bolt lug.More than each structure played the resonance that has reduced gear chamber cover respectively, reduced the noise of train of gearings 2, increased the intensity of gear chamber cover 3, made things convenient for the installation of motor peripheral matched part.
As shown in Figure 7, phase detector hole 3m, vent 3n and B/P EGR Back Pressure Transducer EGR hole 3p have been increased at the leftward position place of gear chamber cover 3.Phase detector hole 3m is arranged on the camshaft gear wheel 2c horizontal axis position, is used for detection of engine rotating speed or dead-centre position; Vent 3m can make the interior gas of interior gas of crankcase and valve mechanism cover communicate, and makes the oil gas in the crankcase divide open cycle; B/P EGR Back Pressure Transducer EGR hole 3n provides convenience for the negative pressure that detects in the crankcase.When not using each machining hole only otherwise machining hole or load onto the sealing that obstruction can realize gear chamber cover 3.