CN112814805A - Power assembly for variable frequency generator - Google Patents
Power assembly for variable frequency generator Download PDFInfo
- Publication number
- CN112814805A CN112814805A CN202011618972.9A CN202011618972A CN112814805A CN 112814805 A CN112814805 A CN 112814805A CN 202011618972 A CN202011618972 A CN 202011618972A CN 112814805 A CN112814805 A CN 112814805A
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- China
- Prior art keywords
- cover
- crankcase
- cylinder head
- crankshaft
- silencer
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F7/00—Casings, e.g. crankcases or frames
- F02F7/006—Camshaft or pushrod housings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
- F01M11/10—Indicating devices; Other safety devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B63/00—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices
- F02B63/04—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices for electric generators
- F02B63/044—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices for electric generators the engine-generator unit being placed on a frame or in an housing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F1/00—Cylinders; Cylinder heads
- F02F1/24—Cylinder heads
- F02F1/26—Cylinder heads having cooling means
- F02F1/28—Cylinder heads having cooling means for air cooling
- F02F1/30—Finned cylinder heads
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F7/00—Casings, e.g. crankcases or frames
- F02F7/0065—Shape of casings for other machine parts and purposes, e.g. utilisation purposes, safety
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F7/00—Casings, e.g. crankcases or frames
- F02F7/0065—Shape of casings for other machine parts and purposes, e.g. utilisation purposes, safety
- F02F7/007—Adaptations for cooling
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
The invention discloses a power assembly for a variable frequency generator, which comprises a silencer, a crankcase body, a crankcase cover, a large starting cover and a motor, wherein the crankcase cover is arranged on the right side of the crankcase body through a box closing bolt, the large starting cover is arranged on the right side of the crankcase cover, the motor is arranged on the right side of the crankcase cover, the silencer is arranged on the left side of the crankcase body, and the silencer is fixed on the left side of the crankcase body through a silencer protective cover outside the silencer. The crankcase body and the crankcase cover are exchanged, so that the installation structure of a starting large cover, a motor and the like is not required to be arranged on the crankcase body, the structure of the crankcase body can be effectively simplified, the main body mold of the crankcase body only needs an upper mold and a lower mold, and the difficulty and the cost of a crankcase body casting mold are reduced.
Description
Technical Field
The invention belongs to the technical field of generator parts, and particularly relates to a power assembly for a variable frequency generator.
Background
The generator is a machine capable of converting other forms of energy into mechanical energy, the existing generator converts the heat energy generated by burning gasoline or natural gas into kinetic energy, and the variable frequency generator is a generator capable of changing the frequency.
In the prior art, a power assembly for a variable frequency generator comprises a crankcase body, a crankcase cover, a silencer, a motor and a large starting cover, wherein the crankcase cover is arranged on the left side of the crankcase body through a box closing surface, the motor and the large starting cover are arranged on the right side of the crankcase body, the motor is located in the large starting cover, and the silencer is arranged on the left side of the crankcase cover. By adopting the installation mode, the installation structure capable of installing the engine oil alarm, the starting large cover, the motor and the like is required to be arranged on the crankcase body, so that the structure of the crankcase body is complex, and the difficulty and the cost of a crankcase body casting mold are increased.
Disclosure of Invention
The invention aims to provide a power assembly for a variable frequency generator, which simplifies the structure of a crankcase body, thereby reducing the difficulty and cost of a crankcase body casting mold.
Therefore, the technical scheme adopted by the invention is as follows: the utility model provides a power assembly for variable frequency generator, includes silencer, crankcase lid, starts big cover and motor, the crankcase lid is installed on the right side of crankcase through closing the case bolt, be provided with the bent axle mounting hole that is used for installing the bent axle in the crankcase, the bent axle mounting hole does not pierce through the left side of crankcase, be provided with the bent axle hole that is used for the bent axle to wear out in the crankcase lid, start big cover and install the right side at the crankcase lid, the motor is installed on the right side of crankcase lid, and the suit is outside the bent axle and be located and start big cover, the silencer sets up in the left side of crankcase to fix the left side at the crankcase through the outer silencer guard shield of silencer.
Preferably, the silencer is characterized by further comprising a lower air guide cover, a lower air outlet is arranged below the crankcase cover, a lower air passing groove is formed in the position, corresponding to the lower air outlet, of the crankcase body, the lower air guide cover is arranged below the crankcase body and the crankcase cover and can cover the lower air outlet and the lower air passing groove, a lower air inlet is formed in the lower end of the silencer shield, cooling wind energy flows out of the lower air outlet, passes through the lower air passing groove under the action of the lower air guide cover and enters the silencer shield through the lower air inlet to cool the silencer.
Preferably, a cylinder head is mounted at the upper end of the crankcase body, a cylinder head cover is mounted at the upper end of the cylinder head, a plurality of radiating fins are arranged on the outer walls of the cylinder head and the upper end of the crankcase body, wind shields are arranged at the front end and the rear end of each radiating fin of the crankcase body, a cylinder head wind scooper is arranged on the cylinder head, the left side surface of the cylinder head wind scooper just abuts against the right side surface of the silencer protective cover, the right side surface of the cylinder head wind scooper just abuts against the left side surface of the starting large cover, and the cylinder head wind scooper covers the radiating fins on the front side and the rear side of the cylinder head from top to bottom, so that cooling wind energy entering from the starting large cover enters the silencer protective cover along the radiating fins on the front side and the rear.
Further preferably, still include the bayonet lock, the front end sets up to the arch on the start-up big cover and makes the air inlet face of side cooling air on the wind, the back end sets up to the plane as the binding face on the start-up cover, the back end of binding face is provided with first vertical draw-in groove, the position department that the back right-hand member of cylinder head wind scooper corresponds first vertical draw-in groove is provided with the vertical draw-in groove of second, the shape of bayonet lock is the U type, and opening size is less than the distance between first vertical draw-in groove and the vertical draw-in groove installation back bottom surface of second, when the both ends of bayonet lock go into first vertical draw-in groove and the vertical draw-in groove of second respectively from last downwards, can will start big cover and cylinder head.
Preferably, the cylinder head wind scooper is composed of a top plate, a front oblique side plate and a rear side plate, the front oblique side plate and the rear side plate are respectively arranged on the front side and the rear side of the top plate, a spark plug mounting hole is formed in the position, close to the front oblique side plate, of the top plate, a front clamping groove capable of being clamped on a wind shield on the front side of the crankcase body is formed in the lower end of the front oblique side plate, a rear clamping groove capable of being clamped on a wind shield on the rear side of the crankcase body is formed in the lower end of the rear side plate, a cylinder head cover hole is formed in the top plate and corresponds to a cylinder head cover mounting surface, during mounting, the front clamping groove and the rear clamping groove are directly clamped on the wind shield of the crankcase body.
Further preferably, the rear side surface of the large starting cover is integrally formed with an air filter base, and the upper end of the front side of the large starting cover is provided with a first wire clamping groove.
Preferably, two engine oil alarm mounting holes are formed in the middle lower portion in the crankcase cover, a plurality of first reinforcing ribs are arranged in the crankcase cover around the crankshaft hole, a plurality of second reinforcing ribs are arranged in the crankcase body around the crankshaft mounting hole, an alarm wire harness outlet hole is formed in the middle upper portion of the front side of the crankcase cover assembling face, a rubber sealing buckle is arranged in the alarm wire harness outlet hole and used for allowing a wire harness of the engine oil alarm to pass through, at least one first reinforcing rib is arranged between the alarm wire harness outlet hole and the engine oil alarm mounting hole, and a second wire clamping groove is formed in the position, close to the outer side, of the first reinforcing rib; the outer side end of one of the second reinforcing ribs of the crankcase body extends towards the crankcase cover to be flush with the end face of the crankcase body to form a first pressing rib, and after the crankcase cover and the crankcase body are installed together, the first pressing rib is opposite to the second wire clamping groove, and the engine oil alarm wire harness is just pressed from two sides.
Preferably, the lower end of the right side of the crankcase cover extends rightwards to form a wind guide surface matched with the lower end of the large starting cover, the front end of the right side of the crankcase cover extends outwards to form a sealing surface matched with the left end of the large starting cover, a stator wire harness outlet hole is formed in the upper end of the sealing surface, a wire passing groove is formed in a connecting line between the center of the stator wire harness outlet hole and the center of the crankshaft hole, the upper end of the wire passing groove is communicated with the stator wire harness outlet hole, and the lower end of the wire passing groove is close to.
Preferably, the position of the upper air inlet corresponds to the positions of the cylinder head and the heat radiating fins of the crankcase body, a circle of first bulge is arranged on the right side of the upper air inlet, a circle of first matching surface is further arranged outside the first bulge, the first bulge is positioned on the inner sides of the cylinder head air guide cover and the air baffle, and when the muffler protective cover is installed on the cylinder head and the crankcase body, the right sides of the air baffle and the cylinder head air guide cover just abut against the first matching surface.
Preferably, a circle of second protrusions is arranged on the right side face of the lower air inlet, a circle of third protrusions is arranged outside the second protrusions, a second matching face is arranged between the second protrusions and the third protrusions, a wind shielding protrusion is arranged at the lower end of the left side face of the crankcase body, and when the muffler protective cover is installed on the cylinder head and the crankcase body, the left side face of the wind shielding protrusion just abuts against the second matching face.
The invention has the beneficial effects that: the crankcase body and the crankcase cover are exchanged, namely the motor and the large starting cover are arranged on the right side of the crankcase cover, and the silencer is arranged on the left side of the crankcase body, so that the installation structure of the large starting cover, the motor and the like is not required to be arranged on the crankcase body, the structure of the crankcase body can be effectively simplified, only an upper die and a lower die are required for a main die of the crankcase body, and the difficulty and the cost of a crankcase body casting die are reduced; compared with the crankcase cover in the prior art, although the structure of the crankcase cover is increased, the main die of the crankcase cover can be completed by an upper die and a lower die, and the casting difficulty of the crankcase cover is not increased too much.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a perspective view of the present invention.
Fig. 3 is a partial exploded view of the present invention.
Fig. 4 is a schematic view showing a structure of mounting a muffler shroud according to the present invention.
Fig. 5 is a perspective view of the start-up dome installation of the present invention.
FIG. 6 is a schematic view of a bayonet of the present invention.
Fig. 7 is a schematic view of the start-up shroud of the present invention.
Fig. 8 is an enlarged view of M in fig. 7.
Fig. 9 is a first schematic view of the cylinder head wind scooper of the present invention.
Fig. 10 is a second schematic view of the cylinder head wind scooper of the present invention.
FIG. 11 is a first schematic view of a crankcase body according to the present invention.
FIG. 12 is a second schematic view of the crankcase body of the present invention.
FIG. 13 is a first schematic view of a crankcase cover according to the present invention.
FIG. 14 is a second schematic view of the crankcase cover of the present invention.
Fig. 15 is a schematic view of a muffler shroud according to the present invention.
Detailed Description
The invention will be further illustrated by the following examples in conjunction with the accompanying drawings:
as shown in fig. 1-15, a power assembly for a variable frequency generator mainly comprises a muffler 1, a crankcase 2, a crankcase cover 3, a start large cover 4 and a motor 5. The crankshaft box cover 3 is arranged on the right side of the crankshaft box body 2 through a box closing bolt, a crankshaft mounting hole 2a used for mounting a crankshaft is formed in the crankshaft box body 2, the crankshaft mounting hole 2a does not penetrate through the left side of the crankshaft box body 2, a crankshaft hole 3a used for enabling the crankshaft 6 to penetrate out is formed in the crankshaft box cover 3, a large starting cover 4 is arranged on the right side of the crankshaft box cover 3, a motor 5 is arranged on the right side of the crankshaft box cover 3, the motor is sleeved outside the crankshaft 6 and located in the large starting cover 4, a silencer 1 is arranged on the left side of the crankshaft box body 2, and the silencer is fixed on the left side of the crankshaft box.
In order to further cool the muffler 1, a lower air outlet 3b is arranged below the crankcase cover 3, a lower air passing groove 2b is arranged at the position of the crankcase body 2 corresponding to the lower air outlet 3b, a lower air guiding cover 8 is arranged below the crankcase body 2 and the crankcase cover 3 and can cover the lower air outlet 3b and the lower air passing groove 2b, and a lower air inlet 7a is arranged at the lower end of the muffler protecting cover 7. The cooling wind energy flows out from the lower air outlet 3b, passes through the lower air passing groove 2b under the action of the lower air guide cover 8, enters the muffler shield 8 through the lower air inlet 7a, and cools the muffler 1.
The upper end of the crankcase body 2 is provided with a cylinder head, the upper end of the cylinder head is provided with a cylinder head cover 9, the outer walls of the cylinder head and the upper end of the crankcase body 2 are provided with a plurality of radiating fins, and the front end and the rear end of each radiating fin of the crankcase body 2 are provided with wind shields 2 c. The cylinder head is provided with a cylinder head air guide cover 10, the left side surface of the cylinder head air guide cover 10 just abuts against the right side surface of the silencer shield 7, the right side surface of the cylinder head air guide cover 10 just abuts against the left side surface of the large starting cover 4, and the cylinder head air guide cover 10 covers the radiating fins on the front side and the rear side of the cylinder head from top to bottom. The cooling wind energy entering from the starting large cover 4 enters the muffler shield 7 along the radiating fins on the front side and the rear side through the upper air inlet 7b at the upper end of the muffler shield 7 to cool the muffler 1.
The front end of the starting large cover 4 is set to be an air inlet surface 4a for making cooling air on the upper side of the air in an arch shape, the rear end of the starting cover 4 is set to be a plane as a binding surface 4b, and when the cooling air flows to the crankcase body 2 and the cylinder head from the starting large cover 4, the binding surface 4b is easy to tilt, so that the binding surface 4b is prevented from tilting. The rear end of the binding face 4b is provided with a first vertical clamping groove 4c, the position of the rear right end of the cylinder head air guiding cover 10 corresponding to the first vertical clamping groove 4c is provided with a second vertical clamping groove 10a, a U-shaped clamping pin 11 is further arranged, the opening size of the clamping pin 11 is smaller than the distance between the bottom surfaces of the first vertical clamping groove 4c and the second vertical clamping groove 10a after installation, and when the two ends of the clamping pin 11 are respectively clamped into the first vertical clamping groove 4c and the second vertical clamping groove 10a from top to bottom, the large cover 4 can be started and the cylinder head air guiding cover 10 can be clamped tightly.
In order to prevent the bayonet 11 from exiting from the first vertical slot 4c and the second vertical slot 10a due to vibration of the engine after being clamped, an inclined platform a for preventing the bayonet from exiting is arranged at the upper end of any one of the first vertical slot 4c or the second vertical slot 10 a. Accordingly, at least one inward recess is formed at one end of the bayonet 11, wherein a portion close to the open end is used as an anti-receding groove 11a, and for facilitating the installation of the bayonet 11, a portion from the anti-receding groove 11a to the open end is inclined outward to form a snap-in section 11 b.
Because the thickness of the large starting cover 4 is thick, the sloping platform a is arranged at the upper end of the first vertical clamping groove 4c, namely on the large starting cover 4, so as to facilitate the forming of the sloping platform a at the upper end of the clamping groove.
In order to facilitate the installation of the cylinder head wind scooper 10, the cylinder head wind scooper 10 is composed of a top plate 10b, a front inclined side plate 10c and a rear side plate 10d which are respectively arranged on the front side and the rear side of the top plate 10b, a spark plug installation hole is arranged at the position, close to the front inclined side plate 10c, of the top plate 10b, a front clamping groove 10e capable of being clamped on a front side wind shield 2c of a crankcase body is arranged at the lower end of the front inclined side plate 10c, a rear clamping groove 10f capable of being clamped on the rear side wind shield 2c of the crankcase body is arranged at the lower end of the rear side plate 10d, and a cylinder head cover hole 10g is arranged on. During installation, the front clamping groove 10e and the rear clamping groove 10f are directly clamped on the wind shield 2c of the crankcase body, and the cylinder head wind guide cover 10 is tightly pressed on the cylinder head through the mounting bolt pan head arranged on the cylinder head through the cylinder head cover 9.
In order to increase the connection strength between the top plate 10b, the front oblique side plate 10c and the rear side plate 10d, at least two front reinforcing ribs b are arranged at the front and rear intervals of the connection part of the top plate 10b and the front oblique side plate 10c, at least two rear upper reinforcing ribs c are arranged at the front and rear intervals between the top plate 10b and the rear side plate 10d, and at least two rear lower reinforcing ribs d are arranged at the front and rear intervals between the rear clamping groove 10f and the rear side plate 10 d.
In order to enable the front side and the rear side of the cylinder head wind scooper 10 to be correspondingly and better abutted against the large starting cover 4 and the muffler shield 6, front flanges are arranged on the left side and the right side of the front inclined side plate 10c, top flanges are arranged on the left side and the right side of the front end of the top plate 10b, rear flanges are arranged on the left side and the right side of the rear side plate 10d, and the front flanges are connected with the top flanges.
The rear side surface of the large starting cover 4 is integrally formed with the air filter base 4d, so that a mould of the air filter base 4d does not need to be opened independently, and a main mould of the large starting cover 4 is only divided into an upper mould and a lower mould, so that the mould cost for opening the air filter base can be saved, if the air filter base is arranged independently, the large starting cover 4 is also required to be provided with a abdicating structure of the air filter base. In order to facilitate the fixation of the line speed, the first line clamping groove 4e is arranged at the upper end of the front side of the large starting cover 4, so that parts for clamping the line do not need to be additionally arranged independently.
For the fixed of the machine oil warning pencil of convenient installation in crankcase lid 3, be provided with warning pencil fixed knot in crankcase 2 and crankcase lid 3 and construct, it specifically is: two engine oil alarm mounting holes 3c used for mounting an engine oil alarm are formed in the middle lower portion in the crankcase cover 3, a plurality of first reinforcing ribs 3d are arranged in the crankcase cover 3 in a mode of surrounding the crankshaft holes 3a, a plurality of second reinforcing ribs 2d are arranged in the crankcase body 2 in a mode of surrounding the crankshaft mounting holes 2a, an alarm wire harness outlet hole 3e is formed in the middle upper portion of the front side of the box closing face of the crankcase cover 3, a rubber sealing buckle is arranged in the alarm wire harness outlet hole 3e and used for a wire harness of the engine oil alarm to pass through, at least one first reinforcing rib 3d is arranged between the alarm wire harness outlet hole 3e and the engine oil alarm mounting hole 3c, and a second wire clamping groove 3f is formed in the position, close to the outer side, of the first reinforcing rib.
The outer end of one of the second reinforcing ribs 2d of the crankcase body 2 extends to be flush with the end face of the crankcase body 2 in the direction of the crankcase cover 3 to form a first pressing rib 2e, and after the crankcase cover 3 and the crankcase body 2 are mounted together, the first pressing rib 2e is right opposite to the second wire clamping groove 3f, and the engine oil alarm wire harness is just pressed from two sides.
Three first reinforcing ribs 3d are arranged on the crankcase cover 3 between the alarm wire harness outlet hole 3e and the engine oil alarm mounting hole 3c, and the second wire clamping groove 3f is arranged on the middle first reinforcing rib 3 d. A wire passing groove is arranged at the position close to the outer end of the first reinforcing rib 3d above the first reinforcing rib 3d, and a wire clamping groove is arranged at the middle position of the first reinforcing rib 3d below the second wire clamping groove 3 f. The outer end of the other second reinforcing rib 2d of the crankcase body 2 also extends towards the crankcase cover 3 to be flush with the end face of the crankcase body 2 to form a second pressing rib, and after the crankcase cover 3 and the crankcase body 2 are mounted together, the second pressing rib 2b is opposite to the wire passing groove, and the engine oil alarm wire harness is just pressed from two sides.
For the fixed of the stator pencil in making things convenient for motor 5, be provided with stator pencil outlet structure on bent axle case lid 3, it specifically is: the lower end of the right side of the crankcase cover 3 extends rightwards to form a wind guide surface 3g matched with the lower end of the large starting cover 4, the front end of the right side of the crankcase cover 3 extends outwards to form a sealing surface 3h matched with the left end of the large starting cover 4, a stator wiring harness outlet hole 3j is formed in the upper end of the sealing surface 3h, a wiring groove 3k is formed in a connecting line between the center of the stator wiring harness outlet hole 3j and the center of the crankshaft hole 3a, the upper end of the wiring groove 3k is communicated with the stator wiring harness outlet hole 3j, and the lower end of the wiring groove is close.
In order to prevent the stator wiring harness from rotating because of the rotor in the motor 5 and to make the connection between the stator wiring harness and other wiring harnesses loose, a wire pressing structure is arranged at the position of a stator wiring harness wire outlet hole 3j, and the wire pressing structure is as follows: the wire pressing block is provided with a wire pressing mounting column for mounting the wire pressing block at the rear side of the stator wire harness wire outlet hole 3j, the front end of the stator wire harness wire outlet hole 3j is provided with a bolt hole protruding leftwards, the wire pressing block is arranged on the right side of the stator wire harness wire outlet hole 3j, one end of the wire pressing block is sleeved on the wire pressing mounting column, and the other end of the wire pressing block is mounted in the bolt hole through a bolt and fixed. The fixed knot of line ball piece adopts one pot head on the erection column, can reduce the installation of a bolt, can reduce holistic spare part quantity.
In order to ensure the sealing of the upper air inlet 7b, the position of the upper air inlet 7b corresponds to the positions of the cylinder head and the heat radiating fins of the crankcase body, a circle of first bulge 7c is arranged on the right side of the upper air inlet 7b, a circle of first matching surface 7d is further arranged outside the first bulge 7c, the first bulge 7c is located on the inner sides of the cylinder head air guide cover 10 and the air baffle plate 2c, and when the silencer protective cover 7 is installed on the cylinder head and the crankcase body 2, the right sides of the air baffle plate 2c and the cylinder head air guide cover 10 just abut against the first matching surface 7 d.
In order to ensure the sealing of the lower air inlet 7a, a circle of second protrusions 7e are arranged on the right side face of the lower air inlet 7a, a circle of third protrusions 7f are arranged outside the second protrusions 7e, a second matching face 7g is arranged between the second protrusions 7e and the third protrusions 7f, a wind shielding protrusion 2f is arranged at the lower end of the left side face of the crankcase body 2, and when the silencer protective cover 7 is installed on the cylinder head and the crankcase body 2, the left side face of the wind shielding protrusion 2f just abuts against the second matching face 7 g.
In order to facilitate the installation of the upper end of the silencer shield 7, a support lug 7h is arranged on the upper inner side of the upper air inlet 7b downwards, and a bolt through hole capable of installing the silencer shield 7 on a cylinder head is formed in the support lug 7 h.
In order to further seal the positions of the lower air inlet 7a and the upper air inlet 7b, a circle of foam is arranged outside the first protrusion 7c and the second protrusion 7e and is used for filling gaps between the first protrusion 7c and the wind shield 2c, between the cylinder head wind guide cover 10 and between the second protrusion 7e and the wind shield protrusion 2 f.
Because the lower air inlet 7a is arranged at the lower end of the muffler shield 7, in order to facilitate the cooling air at the lower end to cool the muffler 1, an upward inclined air deflector 7j is arranged at the left side of the lower air inlet 7a, so that the cooling air can be guided to the muffler 1.
Claims (8)
1. The utility model provides a power assembly for frequency conversion generator, includes silencer (1), crankcase (2), crankcase lid (3), starts big cover (4) and motor (5), its characterized in that: the crankshaft box cover (3) is mounted on the right side of the crankshaft box body (2) through a box closing bolt, a crankshaft mounting hole (2a) for mounting a crankshaft is formed in the crankshaft box body (2), the crankshaft mounting hole (2a) does not penetrate through the left side of the crankshaft box body (2), a crankshaft hole (3a) for a crankshaft (6) to penetrate out is formed in the crankshaft box cover (3), the large starting cover (4) is mounted on the right side of the crankshaft box cover (3), the motor (5) is mounted on the right side of the crankshaft box cover (3), is sleeved outside the crankshaft (6) and located in the large starting cover (4), the silencer (1) is arranged on the left side of the crankshaft box body (2), and is fixed on the left side of the crankshaft box body (2) through a silencer protective cover (7) outside the silencer (1);
the silencer cooling structure is characterized by further comprising a lower air guide cover (8), a lower air outlet (3b) is arranged below the crankcase cover (3), a lower air passing groove (2b) is arranged at the position, corresponding to the lower air outlet (3b), of the crankcase body (2), the lower air guide cover (8) is arranged below the crankcase body (2) and the crankcase cover (3) and can cover the lower air outlet (3b) and the lower air passing groove (2b), a lower air inlet (7a) is arranged at the lower end of the silencer shield (7), cooling wind energy flows out of the lower air outlet (3b), passes through the lower air passing groove (2b) under the action of the lower air guide cover (8) and enters the silencer shield (8) through the lower air inlet (7a) to cool the silencer (1);
the cylinder head is arranged at the upper end of the crankcase body (2), the cylinder head cover (9) is arranged at the upper end of the cylinder head, a plurality of radiating fins are arranged on the outer walls of the cylinder head and the upper end of the crankcase body (2), wind shields (2c) are arranged at the front end and the rear end of each radiating fin of the crankcase body (2), a cylinder head wind guide cover (10) is arranged on the cylinder head, the left side surface of the cylinder head wind guide cover (10) is just propped against the right side surface of the silencer shield (7), the right side surface of the cylinder head wind guide cover (10) is just propped against the left side surface of the large starting cover (4), the cylinder head wind guide cover (10) covers the radiating fins at the front side and the rear side of the cylinder head from top to bottom, so that cooling wind energy entering from the large starting cover (4) enters the silencer shield (7) along the radiating fins at the front side and the rear, the muffler (1) is cooled.
2. The power assembly for a variable frequency generator according to claim 1, wherein: still include bayonet lock (11), the front end sets up to the arch and makes air inlet face (4a) of wind upside cooling air on the big cover of start (4), the rear end sets up to the plane as binding face (4b) on start cover (4), the rear end of binding face (4b) is provided with first vertical draw-in groove (4c), the position department that the back right-hand member of cylinder head wind scooper (10) corresponds first vertical draw-in groove (4c) is provided with second vertical draw-in groove (10a), the shape of bayonet lock (11) is the U type, and the opening size is less than the distance between first vertical draw-in groove (4c) and the second vertical draw-in groove (10a) installation back bottom surface, when the both ends of bayonet lock (11) from last to going into respectively first vertical draw-in groove (4c) and second vertical draw-in groove (10a) downwards, can press from the top tightly start big cover (4) and cylinder head wind scooper (10).
3. The power assembly for a variable frequency generator according to claim 2, wherein: the cylinder head wind scooper (10) consists of a top plate (10b), a front inclined side plate (10c) and a rear side plate (10d) which are respectively arranged on the front side surface and the rear side surface of the top plate (10b), a spark plug mounting hole is arranged at the position of the top plate (10b) close to the front inclined side plate (10c), the lower end of the front inclined side plate (10c) is provided with a front clamping groove (10e) which can be clamped on a wind shield plate (2c) at the front side of the crankcase body, the lower end of the rear side plate (10d) is provided with a rear clamping groove (10f) which can be clamped on a wind shield plate (2c) at the rear side of the crankcase body, a cylinder head cover hole (10g) is arranged on the top plate (10b) corresponding to the cylinder head cover mounting surface, the front clamping groove (10e) and the rear clamping groove (10f) are directly clamped on a wind shield (2c) of the crankcase body, and the cylinder head wind scooper (10) is pressed on the cylinder head through a mounting bolt pan head which is arranged on the cylinder head through a cylinder head cover (9).
4. The power assembly for a variable frequency generator according to claim 1, wherein: the rear side of the large starting cover (4) is integrally formed with an air filter base (4d), and the upper end of the front side of the large starting cover (4) is provided with a first wire clamping groove (4 e).
5. The power assembly for a variable frequency generator according to claim 1, wherein: two engine oil alarm mounting holes (3c) are formed in the middle lower portion in the crankcase cover (3), a plurality of first reinforcing ribs (3d) are arranged in the crankcase cover (3) in a mode of surrounding the crankshaft holes (3a), a plurality of second reinforcing ribs (2d) are arranged in the crankcase body (2) in a mode of surrounding the crankshaft mounting holes (2a), an alarm wire harness outlet hole (3e) is formed in the middle upper portion of the front side of the box closing face of the crankcase cover (3), a rubber sealing buckle is arranged in the alarm wire harness outlet hole (3e) and used for a wire harness of an engine oil alarm to pass through, at least one first reinforcing rib (3d) is arranged between the alarm wire harness outlet hole (3e) and the engine oil alarm mounting holes (3c), and a second wire clamping groove (3f) is formed in a position, close to the outer side, of the first reinforcing rib (3 d); the outside end of one of the second strengthening ribs (2d) of the crankcase body (2) extends to be flush with the end face of the crankcase body (2) towards the direction of the crankcase cover (3) to form a first pressing rib (2e), and after the crankcase cover (3) and the crankcase body (2) are installed together, the first pressing rib (2e) is right opposite to the second clamping groove (3f), and the engine oil alarm wire harness is just pressed from two sides.
6. The power assembly for a variable frequency generator according to claim 1, wherein: the lower end of the right side of the crankcase cover (3) extends rightwards to form a wind guide surface (3g) matched with the lower end of the large starting cover (4), the front end of the right side of the crankcase cover (3) extends outwards to form a sealing surface (3h) matched with the left end of the large starting cover (4), a stator wire harness outlet hole (3j) is formed in the upper end of the sealing surface (3h), a wire passing groove (3k) is formed in a connecting line of the center of the stator wire harness outlet hole (3j) and the center of the crankshaft hole (3a), the upper end of the wire passing groove (3k) is communicated with the stator wire harness outlet hole (3j), and the lower end of the wire passing groove is close to the crankshaft.
7. The power assembly for a variable frequency generator according to claim 1, wherein: the position of the upper air inlet (7b) corresponds to the position of a cylinder head and a heat radiating fin of the crankcase body, a circle of first protrusion (7c) is arranged on the right side of the upper air inlet (7b), a circle of first matching surface (7d) is arranged outside the first protrusion (7c), the first protrusion (7c) is located on the inner side of the cylinder head air guide cover (10) and the inner side of the air baffle (2c), and when the silencer protective cover (7) is installed on the cylinder head and the crankcase body (2), the right sides of the air baffle (2c) and the cylinder head air guide cover (10) just abut against the first matching surface (7 d).
8. The power assembly for a variable frequency generator according to claim 1, wherein: the right side face of the lower air inlet (7a) is provided with a circle of second protrusions (7e), a circle of third protrusions (7f) are arranged outside the second protrusions (7e), a second matching face (7g) is arranged between the second protrusions (7e) and the third protrusions (7f), the lower end of the left side face of the crankcase body (2) is provided with a wind shielding protrusion (2f), and when the silencer protective cover (7) is installed on the cylinder head and the crankcase body (2), the left side face of the wind shielding protrusion (2f) just abuts against the second matching face (7 g).
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