CN1637243A - Integrated chain case structure with water pump - Google Patents
Integrated chain case structure with water pump Download PDFInfo
- Publication number
- CN1637243A CN1637243A CN 200410103450 CN200410103450A CN1637243A CN 1637243 A CN1637243 A CN 1637243A CN 200410103450 CN200410103450 CN 200410103450 CN 200410103450 A CN200410103450 A CN 200410103450A CN 1637243 A CN1637243 A CN 1637243A
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- China
- Prior art keywords
- chain
- water pump
- pump
- shell
- cylinder block
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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
- F02F7/0065—Shape of casings for other machine parts and purposes, e.g. utilisation purposes, safety
- F02F7/0073—Adaptations for fitting the engine, e.g. front-plates or bell-housings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P5/00—Pumping cooling-air or liquid coolants
- F01P5/10—Pumping liquid coolant; Arrangements of coolant pumps
Abstract
The invention relates to provide a chain case for an engine. The chain case 6 for the engine 1 has a front wall 601 arranged opposite to the inner wall 18f of a cylinder block 2 in one end thereof with the predetermined interval and a right and a left side walls 602 extended from the front wall 601 and overlapped with each of block side walls for integral connection, and forms a chain housing chamber 13 by integrally connecting to the cylinder block. A pump chamber 161 is formed in a thick swelling part 28 extended from a part of the right and the left side walls 602 between a case back wall surface fc overlapped with the opposite surface F of the block side wall on one end side thereof and the surface wall fd on the opposite side. The water pump 16 is formed by closing a through hole by using a pump outer cover 45 pivotally provided with a pump shaft 45 unified with a pump impeller 43 to be fitted in a pump chamber 161.
Description
Technical field
The present invention relates to a kind of chain case structure, it holds the chain transmission system that is used to connect engine crankshaft and valve actuation system or valve mechanism, relate in particular to a kind of chain case structure that is integrated with water pump, this chain case structure overall fixed is to the cylinder side wall of cylinder block one end.
The invention still further relates to chain type and rotate transmission system, use ring chain the rotation of engine crankshaft to be passed to valve driving system or valve mechanism, relate in particular to be used to cover on and apply chain case structure on the chain tensioning device of tension force to chain via camshaft.
Background technique
Motor utilizes rotation drive machine, and the part rotatory force that is arranged in the bent axle of engine cylinder bottom is passed to valve mechanism, to open intake valve and the exhaust valve that is arranged on cylinder head side.Belt rotation drive machine and chain type rotation drive machine all are suitable for as rotation drive machine.In two kinds of devices, though the belt rotation drive machine does not need lubricant oil owing to use rubber parts to mesh driving, but its durability is also thereby not as the chain type rotation drive machine, and the chain type rotation drive machine needs lubricant oil owing to the engagement of having adopted metal to metal, but its durability also becomes better.
Here, under the situation that adopts the chain type rotation drive machine can guarantee durability, the chain shell that is used to hold this mechanism need have oil resistance, therefore, and in many cases, adopt plastics and nonmetal chain shell for example, adopts aluminum alloy chain shell.
In addition, in motor, by making cooling liquid along the cooling liquid supply system circulation that comprises the water jacket in its cylinder block and head, the motor fuselage can remain on suitable temperature, to guarantee the durability of each heating part.
In traditional method, in many cases, be used to make cooling liquid along coolant circulation system circuit water pump by integral installation in cylinder block, and the part rotatory force of bent axle is delivered to the rotating shaft of water pump by rotate transmission system etc. such as chain type.
Disclosed the example of a motor among the JP-A-2002-303136, wherein water pump is contained in the recess of the sidewall that is arranged in cylinder block one end, so that cooling liquid is shunted to be provided to simultaneously in cylinder head and the cylinder block.
Chain type rotation drive machine or device comprise chain tensioning device, and tension force is delivered on the chain to suppress generating noise.Promptly, chain tensioning device comprises chain tensioning device main body and the chain guide with plunger, when receiving spring force or hydraulic pressure, plunger stretches out and carries out work, when the thrust of the plunger that receives the chain tensioning device main body, chain guide pivots, and changing its position, thereby tension force is passed to chain.Wherein in the chain tensioning device main body, the safety valve that is used for spring, the hydraulic pressure supply path of all the time plunger being exerted pressure and is used to eliminate too high hydraulic coupling all is contained in the housing, this housing with bolt to the wall of an end that is positioned at cylinder block and head, the chain tensioning device main body has higher precision, so that chain tension remains on suitable level automatically.
Note, disclosed a kind of chain tensioning device mechanism among the JP-A-2003-35116, the rotation of bent axle that is used for being supported on the cylinder block of the V-type engine with timing chain rotationally passes to first and second camshafts that are supported on rotationally on first and second cylinder head.Wherein disclose, be used for predetermined tension is imposed on the stretcher parts of timing chain and the cylinder block that the chain regulator is arranged on cylinder block.
Summary of the invention
Incidentally, as the example among the JP-A-2002-303136, pump chamber will manage to be formed in the cylinder block, the recess that constitutes pump chamber will be formed at and be arranged on the position that cylinder in the outer wall section of cylinder block, water jacket, crankcase etc. do not interfere, this makes near the structure of the cylinder block inwall parts that pump chamber is become complicated, increase the danger that in the cylinder block material, produces shrinkage cavity in the press casting procedure, caused disqualification rate to increase.
Particularly, during cylinder block, the precision of pump chamber is difficult to guarantee, therefore, needs to guarantee by the cutting recess precision of pump chamber after its die casting in casting, thereby, can increase many machinings man-hour, make cost increase.
The present invention is based on the problem that exists in the conventional example and proposes, and an one purpose provides a kind of chain case structure that is integrated with water pump, need not carry out machining in cylinder block side, can control the increase of disqualification rate and cost.
Incidentally, disclosed in JP-A-2003-35116, under the situation that chain and chain tensioning device assemble in the mode of extending between the cylinder block and head, they are contained in the chain receiving chamber, and the chain receiving chamber forms by the chain shell is installed.But, under the situation that chain and chain tensioning device need be changed or make regular check on,, the chain shell need be pulled down from cylinder block and head in order to open the chain receiving chamber.
Particularly, make it to be in normal state on the chain in order to check that whether chain tensioning device is applied to tension force, perhaps in order to change the chain tensioning device main body, need stretching out of inspection chain tensioning device move and overhang, all need the chain shell is pulled down from the cylinder block and head side when each execution inspection or replacing.This has obviously reduced the efficient of the work of checking, need improve.
The present invention is based on the problems referred to above and proposes, and an one purpose provides a kind of the needs and pulls down the chain shell, is convenient to the chain case structure that carries out the chain tensioning device inspection or more change jobs.
According to a first aspect of the invention, a kind of chain case structure that is integrated with water pump is provided, comprise the end that is installed in cylinder head and have the chain shell that is used to hold the accommodating chamber that is arranged on the rotation drive machine on the cylinder block, and be installed in water pump in the chain shell, this chain case structure that is integrated with water pump is characterised in that and comprises: the thickening part, extend from the part outer surface of chain shell, it has the wall thickness thicker than the wall thickness of accommodating chamber; Through hole is formed in the thickening part, can hold the impeller that penetrates water pump wherein; And cover, be used to seal through hole, to form the vortex chamber of water pump.
According to a second aspect of the invention, provide the chain case structure that is integrated with water pump according to a first aspect of the invention, it is characterized in that, cover supports the impeller of water pump.
According to a third aspect of the invention we, the chain case structure that is integrated with water pump according to a first aspect of the invention is provided, it is characterized in that, the drain passageway recess of water pump extends to the thickening part from through hole, thereby available single Sealing seals drain passageway recess and through hole with respect to cylinder block.
According to a forth aspect of the invention, provide the chain case structure that is integrated with water pump according to a first aspect of the invention, it is characterized in that, the support that is used to support motor is wholely set the position that is formed with the drain passageway recess on the thickening part.
According to a fifth aspect of the invention, the chain case structure that is integrated with water pump according to a first aspect of the invention is provided, it is characterized in that, precalculated position in the chain shell is formed with opening, the mounting point of the chain tensioning device of this precalculated position in being contained in the chain shell, this opening is used to pull down chain tensioning device.
According to a sixth aspect of the invention, provide the chain case structure that is integrated with water pump according to a fifth aspect of the invention, it is characterized in that, be provided with stop member near opening, this stop member is used to prevent that from this position projection chain tensioning device from dropping.
According to a seventh aspect of the invention, the chain case structure that is integrated with water pump according to a fifth aspect of the invention is provided, it is characterized in that, be provided with the lid of the common closure that is used to seal opening, stop member is the used threaded projection of machine screw, and the lid that this machine screw thread is used for closing usually is fixed to the chain shell.
According to a first aspect of the invention, under pump chamber is formed at situation in the cylinder block, do not need cutting (back processing) after the die casting, can minimize cost by the processing technology of this simplification thus.And under the pump chamber of structure more complicated was formed at situation in the cylinder block, the danger that produces shrinkage cavity in the cylinder block material can reduce, thereby can reduce the disqualification rate of end article.And, because pump chamber is formed in the thickening part, therefore can increase chain shell self rigidity, suppressed the increase of thickening part weight simultaneously.
According to a second aspect of the invention, owing to, therefore help to reduce the quantity of included parts like this as the supporting part of the cover double as water pump vane of the lid of pump chamber.
According to a third aspect of the invention we, the cooling liquid sealability of drain passageway recess and through-hole side and the oil seal performance of chain receiving chamber all can be kept, and oil/cooling liquid border seal face and single Sealing can play seal action.Particularly, can overlap each other in the cooling liquid of through-hole side sealing allowance with in the sealing allowance of chain receiving chamber side, thereby form single potted line, and, thickening part with drain passageway recess and through hole can be littler in the overhang transversely of motor, and this helps to make motor compacter dimensionally as far as possible.
According to a forth aspect of the invention, can increase the rigidity of engine support.
According to a fifth aspect of the invention, because when the normally closed opening on the chain shell is opened, can chain tensioning device be pulled down from the chain receiving chamber, therefore need not to pull down the chain shell, just can change chain tensioning device like a cork, or carry out inspection work like a cork, check whether chain tensioning device normally applies tension force to chain.
According to a sixth aspect of the invention, even if under the situation that the chain tensioning device pulled down is dropped, the stop member that is provided with in the projection mode also can be controlled at minimum degree with dropping, and opens the chain receiving chamber by dismounting chain shell chain tensioning device is taken out such extra work thereby can exempt.
According to a seventh aspect of the invention, the threaded projection that forms on the chain shell can the double as stop member, thereby has reduced number of components, has reduced product cost.
Description of drawings
Fig. 1 is a schematic rear view of having used the motor that starts the chain shell of the first embodiment of the present invention;
Fig. 2 is the schematic side elevation of motor shown in Figure 1;
Fig. 3 is the lateral side view of the chain shell of motor shown in Figure 1;
Fig. 4 is the amplification Section View of the major component of engine cylinder shown in Figure 1;
Fig. 5 is the perspective exploded view of an end of chain shell shown in Figure 1 and engine cylinder;
Fig. 6 is the schematic rear view of motor of having used the chain case structure of the second embodiment of the present invention;
Fig. 7 is the schematic side elevation of motor shown in Figure 6;
Fig. 8 is the lateral side view of chain shell shown in Figure 6;
Fig. 9 is the enlarged front view of chain tensioning device main body shown in Figure 6; And
Figure 10 is that exploded view is dissectd in the expansion of an end of chain shell, cylinder head and cylinder block shown in Figure 6.
Embodiment
First embodiment
Fig. 1 and Fig. 2 show a kind of automobile four-stroke gasoline engine (hereafter motor 1), have used on this motor to start the chain shell according to the embodiment of the invention.
In motor 1, cylinder head 3 and cylinder head cover 4 are arranged on the upside of cylinder block 2, and oil sump 5 is arranged on the downside of cylinder block 2, and chain shell 6 is arranged on an end of cylinder block 2, and by this, these motors are formed parts and are connected to each other on the whole and form the motor fuselage.In addition, in cylinder block 2 and cylinder head 3, be furnished with a plurality of cylinder S.Be inhaled into the suction of suction gas of the firing chamber (not shown) that is arranged in cylinder S and the discharge of the waste gas of discharging and control, and the output energy of bent axle 7 by the firing chamber that received by the piston (not shown) comes rotary driving by each constituent elements of intake and exhaust system and valve mechanism (all not shown) from the firing chamber.
Pair of cams axle 8 (with reference to figure 2), the part that it constitutes the valve mechanism (not shown) supports rotationally by a plurality of bearing (not shown) that are positioned at cylinder head 3 and cylinder head cover 4 inside.Camshaft sprocket 9 integral body are connected an end of camshaft 8.Especially, the rotation of bent axle 7 passes to sprocket wheel 9 on the admission cam shaft by chain 12 and timing device TM, and the time that timing device TM opens and closes valve is provided with in advance and postpones.
Be formed with skirt section 201 in the bottom of cylinder block 2, the lower openings in this skirt section 201 is by oil sump 5 closures, thus the formation crankcase, and cylinder block 2 is the aluminium alloy compression casting goods.Bent axle 7 is arranged in the crankcase, is supported on rotationally on a plurality of bearing (not shown).The internal gear (not shown) of crankshaft sprocket 11, the oil pump 29 that hereinafter will be described to and the end that crankshaft pulley 10 integral body are connected to bent axle 7.Annular timing chain (hereinafter, abbreviating chain 12 as) extends between crankshaft sprocket 11 and camshaft sprocket 9 and limits deflection by the stretcher (not shown).Chain 12 is contained in the chain receiving chamber 13, and the chain receiving chamber is formed at this end of cylinder block 2 and is arranged between the chain shell 6 of same end of cylinder block 2.Cylinder head 3 is the aluminium alloy compression casting goods, and the inside of cylinder head 3 is formed with inner chamber 20, is used to hold the water jacket 42 and the valve mechanism VD (with reference to figure 1 and Fig. 2) of cylinder cap side.
In motor 1, radiator 14, thermostat 15, water pump 16 are installed near the inside or outer wall of motor fuselage as the constituent elements of coolant circulation system R.In cylinder block 2, a plurality of vertical (on Vertical direction Z) cylinder S arranges with the axial X of predetermined interval along motor, and each cylinder S is surrounded continuously by the water jacket 17 of cylinder body side.
One distolateral (lower wall among Fig. 4) of cylinder block 2 forms end inwall 18, and its left side and right side projection form extension part 18g.The extending end of extension part has lip part, and lip part is placed in the flange connector portion 601 of chain shell 6, and is fixed to the upper by the bolt (not shown).
As shown in Figure 1 and Figure 4, protruding wall portion 25 forms along the mutual stacked projection of the horizontal Y of cylinder from rear side outer wall 24b and an extension part 18g, and water pump 16 and thermostat 15 are arranged in the proximal lateral of protruding wall portion 25, make the two mutually close.
Be formed with a smooth end subtend face F (part of outer wall of cylinder block) in the protruding wall portion 25, its end (in Fig. 4 down) towards cylinder block 2, this same surface also is formed on the left and right extension part 18g continuously.The housing rear surface fc of chain shell 6 is stacked on this end subtend face F of such formation tightly.
As shown in Figure 1 and Figure 4, chain shell 6 has all continuous substantially in vertical direction antetheca 602 and left and right flange connector 601, therefore sees to have recessed cross section from the top, thereby when being connected to an end subtend face F, can form center chain accommodating chamber 13.And chain shell 6 is made by aluminum alloy, and like this, it is very high that the precision of finished product can keep.In addition, the central lower of antetheca 602 is formed with through hole 46 (with reference to figure 3), and bent axle 7 passes from this through hole, and the same central lower on the inwall of antetheca 602 is provided with oil pump 29, and it constitutes the part of oil circulating system OS.And, antetheca on the part of protruding wall portion 25, be formed with thickening part 28 continuously, water pump 16 is arranged on the thickening part 28, the protruding end on antetheca top is formed with engine support 49.Note, in Fig. 5, label " h " expression peep hole, this peep hole utilizes lid i closure.
The antetheca 602 of the chain shell 6 of said structure closely be connected in the surrounding edge portion down that is positioned at this cylinder head cover one end of cylinder head cover 4 with upper end-face edge left and right sidewall 601, its lower edge closely is connected on the flange connector 501 of the oil sump 5 that is positioned at the one end.By this structure, chain receiving chamber 13 remains on the tight closure state, thereby is convenient to the oil circulation is offered chain 12.
Protruding terminus is formed with fastening 491 on thickening part 28, and a plurality of clamping bolts 51 are set to from last projection face 491 upwards projections.Protruding terminus at link press span 52 is provided with fastener hole, this link press span extends from the internal face of engine compartment (not shown), suitably is fixed on the clamping bolt 51, thereby, by nut n is fastened on the clamping bolt 51, link press span 52 integral body are connected on fastening 491.
Thereby motor fuselage side is passed through the supporting units support of link press span 52 and engine support 49 formations at the vehicle body side (not shown).Here, engine support 49 is parts of thickening part 28, and its rigidity is bigger, thereby can keep enough intensity and durability, and, because chain shell 6 double as engine supports 49, so can reduce the quantity of parts as far as possible.
As shown in Figure 3 and Figure 4, water pump 16 comprises pump chamber 161, pump impeller 43, pump shaft 44 and pump enclosing cover 45 (cover), wherein, pump chamber 161 is the through holes that form in thickening part 28, pump impeller 43 is contained in the pump chamber 161, and water pump spindle 44 is integrated in the pump impeller 43, and water pump spindle 44 passes pump enclosing cover 45, and can rotate freely therein, pump enclosing cover 45 usefulness bolton are to the front face fd of thickening part 28.
In thickening part 28, form pump chamber 161, it extends between housing rear surface fc and front face, and wherein rear surface fc is positioned at the rear side of thickening part 28, and front face is positioned at its opposition side, pump chamber 161 is communicated with inflow path 26, and this inflow path is positioned at a side at concave wall 25 places.Notice that the drain passageway 162 of case side is that the part from the sidewall of pump chamber 161 extends to form.
As shown in Figure 4 and Figure 5, belt wheel 40 is installed on the outboard end of pump shaft 44, this pump shaft is installed in rotation in the pump enclosing cover 45, the crankshaft pulley 10 of bent axle 7 is connected with belt wheel 40 by endless belt 20, thereby when engine-driving, drive water pump 16, therefore liquid circulation can be provided among the coolant circulation system R.
Notice that as shown in Figure 3 and Figure 4, the drain passageway 162 of case side is by at protruding wall portion 25 inner extension path 27 and the components 47 that form, supply with cooling liquids to cylinder cap side water jacket 42 that is arranged on cylinder head side and the cylinder body side water jacket 17 that is arranged on cylinder block side.The cooling liquid that flows into cylinder body side water jacket 17 enters from component 47, then can flow to cylinder cap side water jacket 42, flows to outlet 19 by communication paths 48 then.
Incidentally, as shown in Figure 3, in chain shell 6, form in the mode that the narrower gap by oil/cooling liquid closing of the frontier face fs faces with each other along chain receiving chamber 13 that oil circulating system OS is provided with and pump chamber 161 and the case side drain passageway 162 that is provided with along coolant circulation system R.And an end subtend face F who is positioned at cylinder block 2 sides closely contacts mutually by single Sealing 50 (with reference to figure 4), fixes with clamping bolt then with the oil that is positioned at chain shell 6 sides/cooling liquid border seal face fs.Like this, oil/cooling liquid border seal face fs is as the oil seal face of chain receiving chamber, and this same border seal face is also as the cooling liquid sealing surface of pump chamber 161 and case side drain passageway 162, thereby single Sealing 50 can be realized two sealing functions to oil and cooling liquid.
In addition, overlap with the oil seal allowance of chain receiving chamber 13 sides by the cooling liquid sealing allowance (allowance) that makes pump chamber 161 sides, oil/cooling liquid sealing surface fs can form single Stamping Steel Ribbon, therefore, the overhang of thickening part 28 on the horizontal Y of motor with chain receiving chamber 13 (drain passageway recess) and pump chamber 161 (through hole) can reduce this degree, thereby motor can be made the size of corresponding compactness.
The oil pump 29 that is used for oil circulating system OS is installed in the central lower of the antetheca 601 of chain shell 6.
Oil pump 29 comprises pump case 31 and pump dise 32, wherein pump case forms by the outside projection of periphery that makes the through hole 46 that is formed in the antetheca 602, pump dise 32 is stacked on the interior edge face of pump case part 31, thereby pump dise 32 and pump case part 31 are interfixed with a plurality of bolts, portion forms oil pump room's (not shown) within it by this, thereby, can be installed in the oil pump room in the mode of freely rotating by bent axle 7 internal gear (not shown) that rotates and the external gear that is placed on the internal gear top.Oil pump 29 is communicated with oil purifier (not shown) in the oil sump 5 by flowing into path 36, and is communicated with safety valve 42 and high-pressure oil passage 60, and high-pressure oil passage is arranged on each sliding parts in the motor fuselage by drain passageway 37 arrival.Oil pump 29 is drawn into the oil in the oil sump 5 and flows in the path 36, to the oil pressurization that has sucked, and oil is discharged in the drain passageway 37, at this moment, can oil be adjusted to setting pressure by safety valve 42.Unnecessary oil turns back in the oil sump.
The working procedure of motor that below description is had the chain shell 6 of aforementioned structure.
When motor 1 enters drive condition by connecting the ignition switch (not shown), oil pump 29 links with the rotation of bent axle 7, starts simultaneously, and oil flows through oil circulating system OS, make each sliding parts in the motor fuselage and heated portion receive the oil that flows, thereby be lubricated and cool off.Simultaneously, water pump 16 starts, and makes cooling liquid pass through coolant circulation system R and flows.At this moment, motor is in preheating and coolant temperature is still lower, and thermostat 15 cuts out coolant path 22, can not make heat dissipation thereby cooling liquid turns back in the pump chamber 161.When motor preheating fully, when the temperature of cooling liquid was increased to higher temperature simultaneously, thermostat 15 was opened coolant path 22, thereby allowed cooling liquid to flow to radiator 14 from exporting 19, and its heat that scatters and disappears in radiator turns back in the pump chamber 161 then.
In such motor 1, the pump chamber 161 that is through hole is not arranged in the cylinder block 2, and is arranged in the thickening part 28 on the chain shell 6.Pump chamber 161 sealings that will so be provided with then with pump cover 45, thus assembling forms water pump 16.Therefore, pump chamber 161 can form and have excellent precision in aluminium alloy compression casting chain shell 6, so just need after die casting, not carry out pump chamber necessary cutting (back processing) when being formed at cylinder block again, thereby pump chamber 161 can be made and has excellent precision and don't need cutting.Therefore, guarantee appropriate clearance required when impeller 43 is packed pump chamber 161 into easily, thereby can reduce cost by simplifying course of working.
In addition, owing to the constituent element of the pump chamber 161 that only is through hole as water pump 16 is formed in the antetheca 602, thereby simplify the structure.In other words, have in the process of cylinder block 2 of pump chamber in die casting, because the structural complexity of the surrounding edge of pump chamber part, can cause being positioned at the cylinder block material production shrinkage cavity at the surrounding edge place of pump chamber, present this danger has reduced, thereby can reduce the disqualification rate of final cylinder block 2.
In addition, an end subtend face F of cylinder block 2 and the oil/cooling liquid border seal face of chain shell 6 sides can be used as oil seal face and cooling liquid sealing surface, thereby realize the two the function of sealing of oil and cooling liquid.Therefore, by cooling liquid sealing allowance and oil seal allowance are overlapped each other, oil/cooling liquid border seal face fs can form single Stamping Steel Ribbon, therefore, the overhang of thickening part 28 on the horizontal Y of motor with chain receiving chamber 13 and pump chamber 161 can reduce this degree, and this helps to make the size of motor compact as far as possible.
In addition, because thickening part 28 double as engine supports 49, so the quantity of parts can reduce this degree as far as possible, and, because engine support 49 is parts of thickening part 28,, thereby can keep enough intensity and durability so the change of the rigidity of engine support 49 is big.
Though in above embodiment, the pump chamber 161 of double as chain receiving chambers 13 28, thickening part, water pump, the pump case 31 and the engine support 49 of oil pump 29, but if necessary, in the pump case 31 of engine support 49 and oil pump 29 also can be not included in, to simplify its structure, in this case, still can obtain similar function and advantage.
Though in above embodiment, motor 1 shown in Fig. 1 uses the oil pump 16 that is driven by bent axle 7, but also can be not like this, and adopt the electric water pump (not shown) is arranged in structure in the chain shell 6, in this case, the similar function and the advantage that still can obtain to use the chain shell 6 among Fig. 1 to obtain.
Simultaneously, in this embodiment, the chain shell that starts according to the present invention is described as being applied on the petrolic motor fuselage, and the present invention can be applied on the fuselage of diesel engine equally.
Second embodiment
Automobile four-stroke gasoline engine shown in Fig. 6 and Fig. 7 (hereinafter, abbreviating motor 101 as) has wherein been used the chain case structure of the second embodiment of the present invention.
In motor 101, cylinder head 103 and cylinder head cover 104 are arranged in the upside of cylinder block 102, oil sump 105 is arranged in the downside of cylinder block 102, chain shell 106 is arranged on the wall of an end of cylinder block 102 and cylinder head 103, by this, thus all these motors form parts and be connected to each other in integral body and form the motor fuselage.In addition, in cylinder block 102 and cylinder head 103, be furnished with a plurality of cylinder S.Suction is arranged in the firing chamber (not shown) neutralization of cylinder block S to be controlled by the constituent elements of intake and exhaust system and valve actuation system or valve mechanism from the suction gas of this firing chamber discharge and the suction and the discharge of waste gas, and bent axle 107 is driven in rotation when receiving the output energy of the firing chamber that is received by the piston (not shown).
A pair of air inlet and exhaust cam shaft 108i, 108e (with reference to figure 7 and Figure 10), it constitutes a part of (not shown) of valve mechanism, by the rotatable inside that is supported on cylinder head 103 and cylinder head cover 104 of a plurality of bearing (not shown).Camshaft sprocket 109i, 109e (with reference to figure 7) one respectively are connected on camshaft 108i, the 108e.Particularly, intake-side camshaft sprocket wheel 109i is connected on the admission cam shaft 108i by timing device 111 (with reference to figure 6), thereby timing device 111, it receives bent axle 107 by chain 129 (with reference to figure 7) and rotates, in advance or postpone after valve opening and closed time is provided with, the rotation of bent axle 107 is passed to the intake cam (not shown).
As shown in Figure 6, cylinder block 102 is aluminium alloy compression casting products, comprises a plurality of cylinder S and the cylinder body side water jacket 116 that cools off around these a plurality of cylinder block S, and the lower openings of cylinder block 102 is sealed with oil sump 105, thereby forms crankcase.Bent axle 107 is arranged in the crankcase, is supported on rotationally on a plurality of bearing (not shown), and the crankshaft sprocket 112 that the back will be described, the internal gear (not shown) of oil pump 113 and crankshaft pulley 114 integral body are connected to an end of bent axle 107.
One end of cylinder block 102 is formed with end inwall 118, a left side and the outstanding extension part 118g that is formed with of right-hand member from end inwall 118, the flange portion of the end of extension part 118g is stacked on the flange connector 601 of bottom of chain shell 106, and the flange 601 of the flange portion of extension part 118g and chain shell 106 is fastened to together by the bolt (not shown).Notice that from the top, upper end inwall 301 and lower end inwall 118 constitute identical sectional shape, and be connected to each other and be integral.Here, protruding wall portion 121 near the extension part 118g of cylinder block 102 and rear side outer wall 119 jointing places along extending on the horizontal Y of motor.
Be formed with a smooth end subtend face F (part of outer wall of cylinder block face) in protruding wall portion 121, it is towards an end of cylinder block 102, and this same surperficial F also forms and is extended on the left and right extension part 118g.The housing rear surface fc (with reference to figure 8) of chain shell 106 is to form on the end subtend face F that can be stacked in such formation.
As Fig. 6 and shown in Figure 8, chain shell 106 is aluminium diecastings, has all basic in vertical direction antetheca 602 and the left and right flange connector 601 that extends continuously, therefore sees to have recessed cross section from the top, thereby when being connected to an end subtend face F, can form center chain accommodating chamber 122.
As shown in figure 10, in chain shell 106, the bottom at its center is formed with the through hole 123 (with reference to figure 8) that bent axle 107 therefrom passes, and its top is formed with chain tensioning device peep hole 124, as a closed usually opening, this peep hole constitutes the part of chain type rotation drive machine of the present invention.Below the main body 131 of the chain tensioning device that will describe is installed on the end inwall 118 of the darker side of chain tensioning device peep hole 124 or cylinder block 102 position towards chain tensioning device peep hole 124.Here, chain tensioning device peep hole 124 has the open area, to allow to pull down the main body 131 of chain tensioning device, usually closed lid 132 is stacked on the edge section opening on every side of peep hole 124, thereby closed chain stretcher peep hole 124 under normal circumstances, the lid 132 of therefore, closing usually can be with bolt to the opening on every side of edge section.Here, the lid 132 that uses a plurality of bolts to close usually is fastened on the opening on every side of edge section, screwed protruding 133 (with reference to the figure 6 to Fig. 8) that be formed with tapped hole is used for the bolt that these a plurality of bolts are positioned at chain tensioning device peep hole 124 belows, and they are more to 122 projections of chain receiving chamber than other threaded lug boss.And, the gap B that forms between the internal face of this threaded lug boss 133 and right flange connector 601 is set to be slightly smaller than the external width of preceding and back, left and right and the top and bottom side of the shell 134 that is used for chain tensioning device main body 131, thereby threaded lug boss 133 and right flange connector 601 can play the effect of stop member, thereby can prevent that chain tensioning device main body 131 from dropping downwards.
The oil pump 113 that is used for oil circulating system OS is arranged on the inwall circumference edge portion of the through hole 123 that bent axle 107 therefrom passes, extend to form a thickening part 127 in the position towards protruding wall portion 121 continuously from this inwall circumferential edge portions, water pump 126 just is formed at this place, thickening part.
As shown in Figure 8, the oil pump 113 that is arranged on the central lower of antetheca 602 comprises pump case 146 and pump dise 147, wherein pump case stretches out by the periphery that makes the through hole 123 in the antetheca 602 and forms, and pump dise is stacked on the interior edge face of pump case 146, thus with bolt on it.In addition, oil pump room's (not shown) is formed on the inside of pump case 146, and internal gear (not shown) and external gear all are installed in the oil pump room, and wherein internal gear rotates by bent axle 107, and external gear is installed on the internal gear.Oil pump 113 is communicated with oil purifier (not shown) in the oil sump by flowing into path 148, and is communicated with by drain passageway 149 and safety valve 1051 and each sliding parts of being arranged in the motor fuselage.
In chain receiving chamber 122, a chain supporting part 128 is set below pump case 146 ends, through hole 123 in the mode of projection.The skew constraint component of chain supporting part 128 looping timing chains (being designated hereinafter simply as chain 129), this chain constitutes the part of the critical piece of chain type rotation drive machine of the present invention.That is, chain supporting part 128 plays and prevents that chain 129 from offseting downward too much effect from normal state, extends around crankshaft sprocket 112 with normal mode at normal state lower chain 129.Under normal state, chain supporting part 128 remains on position of rest p1, and this position and crankshaft sprocket 112 separate predetermined gap, and chain 129 extends around this crankshaft sprocket.
As Fig. 8 and shown in Figure 10, on the thickening part 127 of chain shell 106, be limited with the pump chamber 261 of water pump 126.Water pump 126 comprises pump shaft 263, pump enclosing cover 264 and pump belt wheel 265, pump shaft has pump impeller 262, and its coupling ground inserts in the pump chamber 261, and the pump enclosing cover makes pump shaft 263 fixing rotationally, and it is fastened on the front face fd, and pump belt wheel one is connected to the protruding terminus of pump shaft 263.Pump chamber 261 is communicated with the thermostat 136 that is positioned at cylinder block 102 sides, and the drain passageway that extends from pump chamber 261 is communicated with the drain passageway 137 of cylinder body side.The drain passageway 137 of cylinder body side extends to the communication paths 138 in cylinder body side water jacket 116 and cylinder cap side water jacket 115, the cylinder head 103 and exports 139.When motor just in preheating, when the temperature of cooling liquid was low, outlet 139 was connected to thermostat 136 by short circuit path 142, when motor preheating fully, and when coolant temperature had been increased to higher temperature, outlet 139 was connected to thermostat 136 by radiator 141.
In the chain shell 6 of such motor 101, the top of left and right sidewall 601 one respectively is connected on the left and right extension part 302 of cylinder head cover 104, and the bottom of left and right sidewall 601 one respectively is connected on the left and right extension part 118g of cylinder block 102, by this, chain receiving chamber 122 remain on the tight closure state and with the upper and lower spatial communication of oil sump 105 and cylinder head cover 104, be convenient to like this oil is offered chain 129.Chain 129 is contained in the chain receiving chamber 122, and wherein chain 129 extends between crankshaft sprocket 112 and air inlet and exhaust cam 109i, 109e.The chain stretcher that comprises chain tensioning device main body 131 and a pair of chain guiding device 143 is arranged towards chain 129.
As Fig. 7 and shown in Figure 10, to the end inwall 118 of the end inwall 130 of cylinder head 103 and cylinder block 102, this can pivot on pivot bolt 157 as fulcrum with its upper end to having only one (guiding device in left side among Fig. 7) in the guiding device 143 to chain guiding device 143 usefulness bolt for this.
Chain tensioning device main body 131 is comprising plunger 155 in the housing 134 of end on the inwall 118, is providing spring 153, hydraulic pressure cavity 54 and the safety check 156 of pressure to plunger 155 all the time with bolt.Hydraulic pressure cavity 54 is connected to the drain passageway 149 of oil circulating system OS by safety check 156, by from this hydraulic coupling that receives, plunger 155 is stretched out carry out work.Here, on this intermediate portion, be connected with a convex body 1061 to one in the guiding device 143 (guiding device in left side among Fig. 7).Convex body 1061 can engage with plunger 155, thereby pressure is applied on the chain guide 143 from plunger 155, and when chain guide 143 pivots under this pressure effect when mobile, chain 129 pressurizeds automatically provide tension force to chain 129 by this.Note, in JP-A-2002-156013, also disclosed an example of hydraulic chain tensioner main body.
Aforesaid working procedure with motor of chain case structure will be described below.
When motor 101 enters drive condition by connecting the ignition switch (not shown), oil pump 129 links with the rotation of bent axle 107, starts simultaneously, and oil flows through oil circulating system OS, make each sliding parts in the motor fuselage and heated portion receive the oil that flows, thereby be lubricated and cool off.At this moment, chain tensioning device main body 131 receives the hydraulic coupling that arrives hydraulic pressure cavity 154 from drain passageway 149, plunger 155 is stretched out carry out work.Then, plunger 155 and that sway to a guiding device in the chain guide 143, apply the tension force of appropriate level to chain 129.At this moment, the tension force change that makes chain 129 is to increase and to reduce, apply reaction force by the hydraulic coupling in 155 pairs of hydraulic pressure cavity 154 of plunger simultaneously, safety check 156 prevents too much oil from hydraulic pressure cavity 154 discharges, thereby can prevent the too much skew of chain 129 and prevent to produce too much noise.Note, also will start water pump 126 simultaneously, make liquid circulation with cooled engine according to the engine cooling temperature.
Let us is imagined such motor 101 is made regular check on.At this moment, pull down the lid 132 of common closure from chain shell 106, to open as the chain tensioning device peep hole 124 of normally closed opening, thereby can chain tensioning device main body 131 be pulled down from chain receiving chamber 122 by chain tensioning device peep hole 124, to check the wearing and tearing and/or the damage of each constituent element in the chain tensioning device main body 131, afterwards, can with bolt chain tensioning device main body 131 be fixed to end inwall 118 sides again.In addition, we imagine and are checking or changing in the operating process operator and accidentally drop and fall down chain tensioning device main body 131.In this case, tensioner body 131 drops between the internal face of threaded lug boss 133 and right flange connector 601, this two all play the stop member effect, and be fixed on its position.That is to say that dropping to be controlled at minimum level, and the chain tensioning device main body 131 that is locked in threaded lug boss 133 sides can be pulled down by chain tensioning device peep hole 124 like a cork.Therefore, can exempt by pulling down chain shell 106 and wait and open chain receiving chamber 122 drops to 122 bottoms, chain receiving chamber with taking-up chain tensioning device main body 131 this extra works.And, only checking that chain tensioning device main body 131 is whether normally in the routine inspection operation that chain is exerted pressure, only just chain tensioning device peep hole 124 can be opened, thereby checked operation can be finished in a short period of time like a cork by pulling down normally closed lid 132.
In addition, here, because the threaded lug boss 133 double as stoppers that on the inwall of chain shell 106, form, so can reduce number of components and cost of production.
Notice that threaded lug boss 133 can be arranged a plurality of to guarantee preventing that chain tensioning device main body 131 from dropping in its disassembling section process.In addition, an independent baffle plate (not shown) similar structure can also be set below chain tensioning device peep hole 124, and with bolt to the inwall of chain shell 106, drop in its disassembling section process further to prevent chain tensioning device main body 131.
Simultaneously, in the above-described embodiments, the chain shell 106 shown in Fig. 6 is described as comprising oil pump 113 and the water pump 261 that is integrally formed therewith.Also can adopt another kind of structure, wherein remove these parts, in this chain shell, form chain tensioning device peep hole 24, the structure of this chain shell is owing to the removal of these component parts is simplified, in this case, still can obtain similar functions and the advantage that the chain case structure by the motor shown in Fig. 6 obtains.
Simultaneously, in the above-described embodiments, be described to aluminium diecasting according to the chain shell of chain case structure of the present invention, the present invention can be applied to the situation that the chain shell is an aluminum alloy die casting equally.
Claims (7)
1. chain case structure that is integrated with water pump, comprise the end that is installed in cylinder head (3) and have the chain shell (6) that is used to hold the accommodating chamber (13) that is arranged on the rotation drive machine on the cylinder block (2), and be installed in water pump (16) in the described chain shell (6), the described chain shell that is integrated with water pump is characterised in that and comprises:
Thickening part (28), from the part outer surface extension of described chain shell (6), the wall thickness of the described accommodating chamber of its wall ratio (13) is thicker;
Through hole (161) is formed in the described thickening part, so that can hold the impeller that penetrates described water pump wherein; And
Cover (45) is used to seal described through hole, thereby forms the vortex chamber of described water pump.
2. the chain case structure that is integrated with water pump according to claim 1 is characterized in that, described cover (45) supports the impeller (43) of described water pump (16).
3. the chain case structure that is integrated with water pump according to claim 1, it is characterized in that, the drain passageway recess (13) of described water pump (16) extends to described thickening part (28) from described through hole, thereby available single Sealing (50) seals the relative described cylinder block with described through hole of described drain passageway recess (13) (2).
4. the chain case structure that is integrated with water pump according to claim 1 is characterized in that, the support (49) that is used to support motor (1) is wholely set the position that is formed with described drain passageway recess (13) on described thickening part (28).
5. the chain case structure that is integrated with water pump according to claim 1, it is characterized in that, precalculated position in described chain shell is formed with opening (124), the mounting point of the chain tensioning device (131) of described precalculated position in being contained in described chain shell (6), described opening is used to pull down described chain tensioning device (131).
6. the chain case structure that is integrated with water pump according to claim 5, it is characterized in that, be provided with near described opening (124) and be used to the stop member (133,601) that prevents that described chain tensioning device (131) from dropping, described stop member is from the outer wall projection of described chain shell (6).
7. the chain case structure that is integrated with water pump according to claim 5, it is characterized in that, be provided with the lid (132) of the common closure that is used to seal described opening (124), described stop member (133) is the used threaded projection of machine screw, and described machine screw is used for described lid of closing usually (132) is fastened to described chain shell (6).
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003433714 | 2003-12-26 | ||
| JP2003433720 | 2003-12-26 | ||
| JP2003433720A JP4311201B2 (en) | 2003-12-26 | 2003-12-26 | Chain case structure |
| JP2003433714A JP4196827B2 (en) | 2003-12-26 | 2003-12-26 | Water pump integrated chain case structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1637243A true CN1637243A (en) | 2005-07-13 |
| CN100342122C CN100342122C (en) | 2007-10-10 |
Family
ID=34863412
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200410103450XA Expired - Fee Related CN100342122C (en) | 2003-12-26 | 2004-12-27 | Integrated chain case structure with water pump |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN100342122C (en) |
| DE (1) | DE102004062526B4 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102434308A (en) * | 2011-11-17 | 2012-05-02 | 东风朝阳柴油机有限责任公司 | Highly-integrated sprocket cover system |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006019579A1 (en) * | 2006-04-27 | 2007-10-31 | Bayerische Motoren Werke Ag | Coolant circuit for an internal combustion engine |
| SI22915A (en) * | 2008-11-04 | 2010-05-31 | CIMOS@d@d | Bracket of high-pressure pump for internal combustion engines |
| JP5574270B2 (en) * | 2010-01-22 | 2014-08-20 | スズキ株式会社 | Engine chain case structure |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2562842B2 (en) * | 1990-05-01 | 1996-12-11 | 日産自動車株式会社 | Chain chamber structure of internal combustion engine |
| JP3287961B2 (en) * | 1993-10-29 | 2002-06-04 | ヤマハ発動機株式会社 | Engine cooling structure |
| EP0811756B1 (en) * | 1993-10-29 | 2001-08-01 | Yamaha Hatsudoki Kabushiki Kaisha | Four-cycle engine |
| US5503117A (en) * | 1993-10-29 | 1996-04-02 | Yamaha Hatsudoki Kabushiki Kaisha | Engine cooling system |
| DE19543350C1 (en) * | 1995-11-21 | 1996-11-14 | Daimler Benz Ag | Support structure for auxiliary equipment on IC engine |
| US6244239B1 (en) * | 1997-11-19 | 2001-06-12 | Simpson Industries | Integrated front end accessory drive system |
| ID30416A (en) * | 2000-06-01 | 2001-12-06 | Honda Motor Co Ltd | INSTALLATION STRUCTURE OF THE COVER |
| US6453868B1 (en) * | 2000-12-15 | 2002-09-24 | Deere & Company | Engine timing gear cover with integral coolant flow passages |
| JP2002303136A (en) * | 2001-04-04 | 2002-10-18 | Suzuki Motor Corp | Cooling system for engine |
| JP2003035116A (en) * | 2001-07-25 | 2003-02-07 | Suzuki Motor Corp | Oil supply passage structure for v-type engine |
| US6536398B2 (en) * | 2001-08-24 | 2003-03-25 | General Motors Corporation | Fluid flow insert for front cover of engine |
| JP2003328854A (en) * | 2002-05-16 | 2003-11-19 | Suzuki Motor Corp | Valve system for scooter type motorcycle |
-
2004
- 2004-12-24 DE DE102004062526.3A patent/DE102004062526B4/en not_active Expired - Fee Related
- 2004-12-27 CN CNB200410103450XA patent/CN100342122C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102434308A (en) * | 2011-11-17 | 2012-05-02 | 东风朝阳柴油机有限责任公司 | Highly-integrated sprocket cover system |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102004062526B4 (en) | 2015-12-31 |
| DE102004062526A1 (en) | 2005-10-20 |
| CN100342122C (en) | 2007-10-10 |
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