CN201129241Y

CN201129241Y - Water-cooled engine crankshaft case

Info

Publication number: CN201129241Y
Application number: CNU2007201886284U
Authority: CN
Inventors: 李豫玲
Original assignee: Lifan Industry Group Co Ltd
Current assignee: Lifan Technology Group Co Ltd
Priority date: 2007-12-24
Filing date: 2007-12-24
Publication date: 2008-10-08
Anticipated expiration: 2017-12-24

Abstract

The utility model discloses a water-cooled engine crankcase, wherein the left case body is in butt joint with the right case cover to form a crank chamber, one end of a left crank and a right crank relative to the end face is connected by the same crank pin, the other end of the left crank penetrates the left case cover, and the other end of the right crank is positioned in the right case cover. The water-cooled engine crankcase is characterized in that the right crank jacketed pump drive gear wheel positioned in the right case cover is connected with a water pump, the water pump head penetrates outside the right case cover, the right crank positioned in the crank chamber is sleeved with a balance drive gear which meshes with a balance driven gear, and the balance driven gear is sleeved on a balance shaft which is provided with a balancing weight. The water-cooled engine crankcase has convenient modification and compact structure, after being reasonably mounted with a cooling water pump, the water-cooled engine crankcase can maintain the installing position of the original crankcase, thereby guaranteeing a foot starter and other functional parts to be reserved, maintaining the mounting position of the original engine suspension hole, avoiding overall arrangement and design and reducing design cost and manufacturing cost.

Description

The water cooled engine crankcase

Technical field

The utility model belongs to motor, specifically, is a kind of water cooled engine crankcase that is used on the motorcycle.

Background technique

In existing cooling motorcycle engine water technology, crankcase is main kinetic energy transfer mechanism carrier, as shown in Figure 2: the water cooled engine crankcase mostly is to improve on original air cooling engine crankcase, it comprises left bent axle, right bent axle, left box body, right case, left side case lid and right case lid, wherein said left box body is connected through bolt with left case lid, and the two is through on the same described left bent axle, described right case is connected through bolt with right case lid, and the two is through on the same described right bent axle, a described left side, right case is docking together and by bolt, a left side, the upper cavity that right case butt joint back forms is as crank chamber, having oil duct on the right bent axle is communicated with the oil duct of described right case lid with crank chamber, a described left side, the central axis of right bent axle point-blank, right crankshaft bearing is installed on the described right bent axle to be connected with described right case, right bent axle on right crankshaft bearing right side stretches in the described right case lid, and be set with balance driving gear through the key suit, the balance driving gear is meshed with the balance driven gear, and this balance driven gear is sleeved on the trunnion shaft.Simultaneously, right crankshaft bearing end in right case lid is equipped with oil filter, the main effect of oil filter is, for guaranteeing in crank chamber, to provide clean lubricating oil, machine oil in the oil duct on the right case lid is carried out cleaning and filtering once more, and oil filter is with the high speed rotating of right crankshaft bearing, and the impurity that quality is heavier throws away, stay lightweight, clean machine oil, and send in the oil duct on the right bent axle.

Along with the motorcycle manufacturing technology is constantly perfect, cooling motorcycle water is an inevitable trend, and the water pump in the cooling motorcycle water is mounted for a very significantly difficult problem, the mounting point of original air cooling engine crankcase is very compact, the space of a water pump is installed on crankcase between busy fully, water pump is installed if desired, certainly will to cause the redesign of engine crankcase, involve motorcycle engine probably, even the redesign of Finished Motorcycle of motorcycle, its man-hour is huge, with high costs, therefore many MANUFACTURER are on the basis of original air cooling engine crankcase manufacturing technology, and the cancellation trunnion shaft is perhaps moved out of trunnion shaft original mounting point, other function items that save motorcycle are realized the installation of water pump.

The shortcoming of existing water cooled engine crankcase is, after installing cooling waterpump, the cancellation oil filter, cause the machine oil of sending into crank chamber to fail to obtain secondary filter, no trunnion shaft, engine luggine is excessive, shortened the working life of motor, ride comfort of motorcycle is poor, perhaps cooling waterpump is moved other mounting point, causes other functors such as riding starting drive to be saved, or install trunnion shaft additional in other positions, cause engine suspension hole coordinate position to change, cause rearranging of car load, increase design and manufacture cost.

The model utility content

The purpose of this utility model provides a kind of water cooled engine crankcase, can keep the overall structure of former crankcase, does not influence on the basis of former other functions of crankcase, and cooling waterpump is installed.

For achieving the above object, the utility model is explained a kind of water-cooling balancing engine crankcase, comprise left bent axle, right bent axle, left box body, right case, left side case lid and right case lid, wherein said left box body is connected through bolt with left case lid, and the two is through on the same described left bent axle, described right case is connected through bolt with right case lid, and the two is through on the same described right bent axle, a described left side, right case is docking together and by bolt, a left side, the upper cavity that right case butt joint back forms is as crank chamber, having oil duct on the right bent axle is communicated with the oil duct of described right case lid with crank chamber, a described left side, the central axis of right bent axle point-blank, right crankshaft bearing is installed on the described right bent axle to be connected with described right case, its key is: the right bent axle on described right crankshaft bearing right side stretches in the described right case lid, be set with the water pump driving gear through key on the right bent axle of this, this water pump driving gear is engaged with the water pump driven gear, this water pump driven gear and described water pump are installed on the same main shaft, and the head of described water pump passes described right case lid;

Left side at described right crankshaft bearing, and be set with the balance driving gear through key on the close right bent axle of this right side crankshaft bearing, this balance driving gear and the engagement of balance driven gear, this balance driven gear is sleeved on the trunnion shaft, the two ends of described trunnion shaft are installed in respectively on described left box body and the right case through bearing, on this trunnion shaft equilibrium block is installed, this equilibrium block inserts between the described left and right bent axle.

The cancellation oil filter, water pump is installed in former oil filter place, the right case lid outside, and the balance driving gear is moved to the left side of right crankshaft bearing, avoid balance driving gear and water pump to tie up the space of right case lid, kept trunnion shaft, also keep the overall structure of former crankcase, avoid the design that rearranges of car load.

Also be installed with disc on the right bent axle in described right crankshaft bearing left side, this disc is near the outlet of oil duct in the described right bent axle.

Oil duct on right bent axle leads to crank chamber, surrounds a space between disc and the right bent axle shank, and right bent axle and disc form an oil filter in this outlet port, and the machine oil of sending into crank chamber is carried out secondary filter.

At oil duct disc is installed, has been replaced oil filter, disc is with the high speed rotating of right crankshaft bearing, and the impurity that quality is heavier throws away, and stays lightweight, clean machine oil, and sends in the crank chamber.

Described water pump driven gear and balance driven gear lay respectively at the both sides of described right crankshaft center axis.

Be connected by left crankshaft bearing between described left box body and the described left bent axle.

End at described left and right bent axle opposing end surface connects through same crank pin, and this crank pin is connected with an end of described crank-connecting rod, and the other end of this crank-connecting rod stretches out described crank chamber.

Remarkable result of the present utility model is: only need make local the change on original air cooling engine, the overall structure of former crankcase can kept, do not influence on the basis of former other functions of crankcase, cooling waterpump is installed, trunnion shaft, it reequips convenient, and compact structure is avoided the design that rearranges of car load.

Description of drawings

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the structural representation of original air cooling engine.

Embodiment

Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.

As shown in Figure 1: a kind of water cooled engine crankcase, by left bent axle 1, right bent axle 2, left box body 5, right case 6, left side case lid 7, right case lid 8, water pump driving gear 11, water pump driven gear 12 and water pump 13 are formed, wherein said left box body 5 and left case lid 7 are connected through bolt, and the two is through on the same described left bent axle 1, described right case 6 and right case lid 8 are connected through bolt, and the two is through on the same described right bent axle 2, a described left side,

right case

5,6 are docking together and by bolt, a left side, right case 5, the upper cavity that 6 butt joint backs form is as crank chamber a, having oil duct C on the right bent axle 2 is communicated with the oil duct b of described right case lid 8 with crank chamber a, a described left side, right bent axle 1,2 central axis point-blank, right crankshaft bearing 4 is installed on the described right bent axle 2 to be connected with described right case 6, the right bent axle 2 on described right crankshaft bearing 4 right sides stretches in the described right case lid 8, be set with water pump driving gear 11 through key on the right bent axle 2 of this, this water pump driving gear 11 is engaged with water pump driven gear 12, this water pump driven gear 12 is installed on the same main shaft 14 with described water pump 13, and the head of described water pump 13 passes described right case lid 8;

Left side at described right crankshaft bearing 4, and be set with balance driving gear 15 through key on the close right bent axle 2 of this right side crankshaft bearing 4, this

balance driving gear

15 and 16 engagements of balance driven gear, this balance driven gear 16 is sleeved on the trunnion shaft 17, the two ends of described trunnion shaft 17 are installed in respectively on described left box body 5 and the right case 6 through bearing, on this trunnion shaft 17 equilibrium block 18 is installed, this equilibrium block 18 inserts between the described left and right bent axle 1,2.

Cancellation oil filter 21, water pump 13 is installed in former oil filter 21 places, right case lid 8 outsides, and balance driving gear 15 is moved to the left side of right crankshaft bearing 4, avoid balance driving gear 15 and water pump to tie up the space of right case lid 8, kept trunnion shaft 17, also keep the overall structure of former crankcase, avoid the design that rearranges of car load.

Also be installed with disc 19 on the right bent axle 2 in described right crankshaft bearing 4 left sides, this disc 19 is near the outlet of oil duct C in the described right bent axle 2.

At right bent axle 2 shanks disc 19 is installed, right bent axle 2 shanks and disc 19 surround the space, it is new oil filter, replaced original oil filter 21, disc 19 is with the high speed rotating of right crankshaft bearing 4, the impurity that quality is heavier throws away, and stays lightweight, clean machine oil, and sends among the crank chamber a.

Described water pump driven gear 12 and balance driven gear 16 lay respectively at the both sides of described right bent axle 2 central axis.

Be connected by left crankshaft bearing 3 between described left box body 5 and the described left bent axle 1.

End at described left and right bent axle 1,2 opposing end surfaces connects through same crank pin 9, and this crank pin 9 is connected with an end of described crank-connecting rod 10, and the other end of this crank-connecting rod 10 stretches out described crank chamber a.Crank-connecting rod 10 is connected with engine cylinder piston.

Working principle of the present utility model is:

At right bent axle 2 shanks disc 19 is installed, has been replaced oil filter 21, disc 19 is with the high speed rotating of right crankshaft bearing 4, and the impurity that quality is heavier throws away, and stays lightweight, clean machine oil, and sends among the crank chamber a.

Water pump 13 is installed in former oil filter 21 places, right case lid 8 outsides, and balance driving gear 15 is moved to the left side of right crankshaft bearing 4, avoid balance driving gear 15 and water pump to tie up the space of right case lid 8, kept trunnion shaft 17, also keep the overall structure of former crankcase, avoid the design that rearranges of car load.

Claims

1, a kind of water cooled engine crankcase, comprise left bent axle (1), right bent axle (2), left box body (5), right case (6), left side case lid (7) and right case lid (8), wherein said left box body (5) is connected through bolt with left case lid (7), and the two is through on the same described left bent axle (1), described right case (6) is connected through bolt with right case lid (8), and the two is through on the same described right bent axle (2), a described left side, right case (5,6) be docking together and by bolt, a left side, right case (5,6) upper cavity of butt joint back formation is as crank chamber (a), having oil duct (c) on the right bent axle (2) is communicated with the oil duct (b) of described right case lid (8) with crank chamber (a), a described left side, right bent axle (1,2) central axis point-blank, right crankshaft bearing (4) is installed on the described right bent axle (2) to be connected with described right case (6), it is characterized in that: the right bent axle (2) on described right crankshaft bearing (4) right side stretches in the described right case lid (8), the right bent axle of this (2) is gone up and is set with water pump driving gear (11) through key, this water pump driving gear (11) is engaged with water pump driven gear (12), this water pump driven gear (12) is installed on the same main shaft (14) with described water pump (13), and the head of described water pump (13) passes described right case lid (8);

Left side at described right crankshaft bearing (4), and the right bent axle (2) of close this right side crankshaft bearing (4) upward is set with balance driving gear (15) through key, this balance driving gear (15) and balance driven gear (16) engagement, this balance driven gear (16) is sleeved on the trunnion shaft (17), the two ends of described trunnion shaft (17) are installed in respectively on described left box body (5) and the right case (6) through bearing, equilibrium block (18) is installed on this trunnion shaft (17), and this equilibrium block (18) inserts between the described left and right bent axle (1,2).

2, water cooled engine crankcase according to claim 1, it is characterized in that: also be installed with disc (19) on the right bent axle (2) in described right crankshaft bearing (4) left side, this disc (19) is near the outlet of oil duct (c) in the described right bent axle (2).

3, water cooled engine crankcase according to claim 1 is characterized in that: described water pump driven gear (12) and balance driven gear (16) lay respectively at the both sides of described right bent axle (2) central axis.

4, water cooled engine crankcase according to claim 1 is characterized in that: be connected by left crankshaft bearing (3) between described left box body (5) and the described left bent axle (1).

5, water cooled engine crankcase according to claim 1, it is characterized in that: the end at described left and right bent axle (1,2) opposing end surface connects through same crank pin (9), this crank pin (9) is connected with an end that is connected with crank-connecting rod (10), and the other end of this crank-connecting rod (10) stretches out described crank chamber (a).