CN209557102U - Variable compression ratio and variable compression ratio engine - Google Patents
Variable compression ratio and variable compression ratio engine Download PDFInfo
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- CN209557102U CN209557102U CN201822240990.2U CN201822240990U CN209557102U CN 209557102 U CN209557102 U CN 209557102U CN 201822240990 U CN201822240990 U CN 201822240990U CN 209557102 U CN209557102 U CN 209557102U
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- compression ratio
- variable compression
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Abstract
The utility model provides a kind of variable compression ratio and variable compression ratio engine, the variable compression ratio of the utility model includes piston, crankshaft and the eccentric shaft with eccentric wheel, and turning set is loaded on the adjusting connecting rod on crankshaft, it is articulated with piston and adjusts the execution connecting rod between connecting rod, and be articulated with eccentric shaft and adjust the drive link between connecting rod；It further include the driving member for being connected at one end of eccentric shaft, harmonic speed reducer on engine cylinder body is set corresponding to driving member, and the installing mechanism on engine cylinder body is fixedly connected in the side of harmonic speed reducer, in being fixedly installed the motor for being offset to side relative to the support shaft in harmonic speed reducer on installing mechanism, and reduction gearing mechanism is equipped between motor and support shaft.The variable compression ratio of the utility model can overcome the shortcomings of that existing driving mechanism occupied space is big by being mounted on motor on mounting structure, while also avoid the problem of causing cylinder body mode to be deteriorated.
Description
Technical field
The utility model relates to technical field of engines, in particular to a kind of variable compression ratio.The utility model is also
It is related to a kind of variable compression ratio engine with the variable compression ratio.
Background technique
Changeable compression ratio technique has become the emphasis research topic of engine art, and existing variable compression ratio mode is existing
Multi link formula, cylinder cap variable volume, length of connecting rod type variable etc., and wherein multi link formula variable compression ratio engine rate
It is introduced into the volume production stage.In multi link formula variable compression ratio engine, control shaft of the eccentric shaft as compression ratio adjustment can
It drives multi-connecting-rod mechanism movement to change dead-center position of piston, and then realizes the adjustment to compression ratio.
For multi link formula variable compression ratio engine, the fuel explosion pressure that piston is subject to can pass through multi-connecting-rod mechanism
It is transferred to eccentric shaft, so that capacity eccentric bearing can be made by biggish torque, thus in the driving of eccentric shaft, is needed using transmitting
Precision is high, and the big harmonic speed reducer of reduction ratio carrys out stand-by motor driving eccentric shaft.But current uses motor and harmonic speed reducer
In structure to drive eccentric shaft turns, generally it is to connect motor directly with retarder to drive harmonic speed reducer, makes
It is larger to obtain driving mechanism entirety occupied space, is not easy to arrangement of the engine in cabin.And if selecting to arrange motor side
On engine cylinder body, then it will cause the problem of harmonic speed reducer wears aggravation and cylinder body mode variation again.
Utility model content
In view of this, the utility model is directed to a kind of variable compression ratio, to overcome driving machine in the prior art
Structure occupied space is not easy to greatly engine arrangement and motor side will lead to the problem of cylinder body mode is deteriorated.
In order to achieve the above objectives, the technical solution of the utility model is achieved in that
A kind of variable compression ratio, including sliding the piston being set in the cylinder barrel in engine cylinder body, rotation is set to institute
The adjusting connecting rod that the crankshaft on engine cylinder body is loaded on the crankshaft with the eccentric shaft and turning set with eccentric wheel is stated,
The execution connecting rod being articulated between the piston and described one end for adjusting connecting rod, and it is articulated with the eccentric shaft and the adjusting
Drive link between the other end of connecting rod；The variable compression ratio engine further include:
Driving member is connected at one end of the eccentric shaft；
Harmonic speed reducer corresponds to the driving member and is arranged on the engine cylinder body, and in the harmonic speed reducer
The transmission of flexbile gear and the driving member be connected；
Installing mechanism, the side of Yu Suoshu harmonic speed reducer are fixedly connected on the engine cylinder body, and the harmonic wave subtracts
It stretches in the installing mechanism outside support shaft one end of wave producer in fast device, and is fixedly installed on the installing mechanism
It is offset to the motor of side relative to the support shaft, and is placed in the installing mechanism in the motor and the support shaft
Reduction gearing mechanism is equipped between one end.
Further, the reduction gearing mechanism is one of chain conveyer, belt transmission or gear transmission structure.
Further, the one end of Yu Suoshu support shaft stretched in the installing mechanism, which is set with, is set to the fitting machine
First bearing on structure, relative to the one end stretched in the installing mechanism, the other end of the support shaft is inserted in described inclined
In mandrel, and one end in the insertion eccentric shaft of the support shaft is set with the be set in the eccentric shaft
Two bearings.
Further, the firm gear fixation is folded between the installing mechanism and the engine cylinder body, and in described
It is folded with gasket seal between installing mechanism and the engine cylinder body, is provided between Yu Suoshu support shaft and the installing mechanism
Oil sealing.
Further, the driving member is the flange with suit hole, and the flange is by being configured in the suit hole
Spline structure suit on wall and the eccentric shaft outer wall is connected on the eccentric shaft, and in the flange be equipped with it is described
The interconnecting piece of flexbile gear connection.
Further, it is set on Yu Suoshu flange and constitutes the eccentric shaft in the rolling for rotating setting on engine cylinder body
Bearing.
Further, one end that the eccentric shaft is connected with the driving member is protruded relative to the driving member to be arranged, and
The outer diameter of the protruding end of the eccentric shaft is identical as the internal diameter of the centre bore of the flexbile gear and is inserted in the centre bore.
Further, relative to the one end for being connected with the driving member, the other end of Yu Suoshu eccentric shaft, which is equipped with, constitutes institute
State the sensor connecting pin of the test side connection of eccentric shaft and external sensor.
Further, the installing mechanism includes the mounting base being connected with the engine cylinder body, and is connected to described
Shell in mounting base, and the support shaft, by the installation seat supports, the motor is fixed in the mounting base, described to subtract
Fast transmission mechanism is contained in the shell.
Compared with the existing technology, the utility model has the advantage that
(1) variable compression ratio described in the utility model is by setting installing mechanism, and motor is made to be mounted on installation
In structure, and it is offset to side relative to the support shaft in harmonic speed reducer, it is axial so as to be saved by the lateral arrangement of motor
Space to overcome the shortcomings of that existing driving mechanism occupied space is big, while because motor is mounted on installing mechanism, also avoiding pacifying
The problem of causing cylinder body mode to be deteriorated on engine cylinder body.
(2) deceleration mechanism uses belt, chain or gear transmission structure, and structure is simple, reliable transmission.
(3) bearing is arranged in support shaft both ends, and is installed on installing mechanism and eccentric shaft respectively, can be in harmonic speed reducer work
When making, lateral force is born by bearing, to prevent the wave producer of harmonic speed reducer by lateral force, and causes the abrasion of retarder.
(4) driving member is the flange being arranged by spline structure, and structure is simple, and is convenient for the arrangement on eccentric shaft,
And certain buffering can be formed to the axial float of eccentric shaft.
(5) rolling bearing is set on flange, its one end connecting with harmonic speed reducer can be limited in eccentric shaft bending moment
Circular runout, to reduce influence to harmonic speed reducer.
(6) end of eccentric shaft is identical as flexbile gear centre bore internal diameter, and is inserted into centre bore, and improve flexbile gear and partially
Concentricity between mandrel, and advantageously reduce the abrasion of flexbile gear.
(7) setting of sensor connecting pin is, it can be achieved that detection to eccentric shaft turns phase, in favor of improving eccentric shaft control
Precision processed.
(8) reduction gearing mechanism is located in shell, can help to the service life for promoting reduction gearing mechanism.
The another object of the utility model is to propose a kind of variable compression ratio engine comprising engine cylinder body,
It and further include the variable compression ratio as described above being arranged at the engine cylinder body.
Detailed description of the invention
The attached drawing for constituting a part of the utility model is used to provide a further understanding of the present invention, this is practical new
The illustrative embodiments and their description of type are not constituteed improper limits to the present invention for explaining the utility model.In
In attached drawing:
Fig. 1 is the structural schematic diagram of variable compression ratio described in the utility model embodiment one；
Fig. 2 is the arrangement schematic diagram of harmonic speed reducer described in the utility model embodiment one and belt wheel；
Fig. 3 is the composition figure of harmonic speed reducer described in the utility model embodiment one；
Fig. 4 is the structural schematic diagram of eccentric shaft described in the utility model embodiment one and flange；
Fig. 5 is the structural schematic diagram of engine cylinder body described in the utility model embodiment one；
Fig. 6 is the arrangement schematic diagram of oil return hole and venthole described in the utility model embodiment one；
Fig. 7 is the structural schematic diagram of mounting base described in the utility model embodiment one；
Fig. 8 is the cross-sectional view of mounting base described in the utility model embodiment one；
Fig. 9 is harmonic speed reducer lubricant passage way schematic diagram described in the utility model embodiment one；
Figure 10 is the schematic diagram of lubricant passage way at oil-through hole described in the utility model embodiment one and second bearing；
Figure 11 is eccentric shaft another kind structural schematic diagram described in the utility model embodiment one；
Figure 12 is harmonic speed reducer another kind lubricant passage way schematic diagram described in the utility model embodiment one；
Description of symbols:
1- piston, 2- execution connecting rod, 3- adjusting connecting rod, 4- crankshaft, 5- execution connecting rod, 6- eccentric shaft, 7- engine cylinder body,
8- motor, 9- installing mechanism, 10- belt, 11- big belt pulley, 12- harmonic speed reducer, 13- installation bolt, 14- oil sealing, 15- are solid
Determine bolt, 16- connection bolt, 17- gasket seal, 18- sensor connecting pin；
601- mandrel, 602- main oil gallery, 603- flange, 604- rolling bearing, 605- bearing mounting hole, 606- oil-through hole；
701- firm gear mounting hole, 702- bearing mounting hole, 703- mandrel mounting hole, 704- oil return hole, 705- venthole,
706- fuel feed hole；
901- bearing mounting hole, 902- seal mounting hole, 903- firm gear mounting hole, 904- motor shaft via hole；
121- wave producer, 1211- support shaft, 12111- blind hole, 122- flexbile gear, 1221- centre bore, 123- firm gear,
124- first bearing, 125- second bearing.
Specific embodiment
It should be noted that in the absence of conflict, the feature in the embodiments of the present invention and embodiment can
To be combined with each other.
The utility model will be described in detail below with reference to the accompanying drawings and embodiments.
Embodiment one
The present embodiment is related to a kind of variable compression ratio, is specially multi link formula variable compression ratio structure, and such as Fig. 1
Shown in, which generally comprises the piston 1 that sliding is set in the cylinder barrel in engine cylinder body 7, and rotation is set to engine
Crankshaft 4 on cylinder body 7 is loaded on the adjusting connecting rod 3 on crankshaft 4 with the eccentric shaft 6 and turning set with eccentric wheel, is articulated with work
Execution connecting rod 2 between plug 1 and the one end for adjusting connecting rod 3, and the eccentric wheel that is articulated on eccentric shaft 6 and adjusting connecting rod 3 are another
Drive link 5 between one end.
In addition, the variable compression ratio engine of the present embodiment further comprises the biography for being connected in 6 one end of eccentric shaft
The harmonic speed reducer 12 on engine cylinder body 7 is arranged in corresponding to the driving member in moving part, and in the side of harmonic speed reducer 12
The installing mechanism being fixedly connected on engine cylinder body 7.And the flexbile gear in harmonic speed reducer 12 be located at eccentric shaft 6 one end
Driving member transmission is connected, the support shaft of the wave producer in harmonic speed reducer 12 namely the axis for rotational support wave producer
It is stretched in outside one end of body in above-mentioned installing mechanism 9, and be offset to side relative to support shaft in being fixedly installed on installing mechanism 9
Motor 8, the deceleration transmission machine for being then provided with transmitting power is placed between one end in installing mechanism in motor 8 and support shaft
Structure.
Wherein, for the variable compression ratio of the present embodiment, at work, eccentric shaft 6 is subtracted by motor 8 by harmonic wave
Fast device 12 controls its rotation, and because of the rotation of eccentric shaft 6, the swinging support position of drive link 5 changes, and passes through the company of adjusting
Bar 3 and the linkage for executing connecting rod 2, thus may make the top dead center position of piston 1 to get higher or be lower, can realize engine with this
The adjusting of compression ratio.
And in the variable compression ratio of the present embodiment, primary object is then by setting on engine cylinder body 7
Installing mechanism 9 is set, and is mounted on motor 8 on the mounting structure 9, and for relative to the support shaft biasing in harmonic speed reducer 12
In side.Thus it can be driven by the lateral arrangement of motor 8 to save axial space to overcome in existing variable compression ratio engine
The big deficiency of motivation structure occupied space, meanwhile, by being mounted on motor 8 on installing mechanism 9, it also can be avoided the installation of motor 8
On engine cylinder body 7 and caused by cylinder body mode be deteriorated the problem of.
Specifically, as shown in Figure 2, above-mentioned reduction gearing mechanism specially uses belt transmission structure, and by leading to
The big belt pulley 11 that fixing bolt 15 is fixedly installed on harmonic speed reducer 12 is crossed, motor 8 not shown in the figure is fixed on
On small belt pulley, and the belt 10 that is connected between two belt pulleys constitutes, by the difference of two diameter pulleys, i.e.,
The primary speed-down to 8 output power of motor can be achieved, after then leading to the double reduction of harmonic speed reducer 12 again, just can drive partially
Mandrel 6 rotates, and the design of the double reduction then can be good at solving multi link formula variable compression ratio topology requirement large torque
The problem of motor, and can solve that 8 electric current of motor is big, and consume energy high problem.
The structure of the harmonic speed reducer 12 of the present embodiment is specifically as shown in Figure 3, and the harmonic speed reducer 12 is by wave producer
121, firm gear 123 and flexbile gear 122 are constituted, and support shaft 1211 above-mentioned wears the center for being connected in wave producer 121, to make
For the support carrier of wave producer 121, and it is also used for accepting the power input of harmonic speed reducer 12.In wave in support shaft 1211
The side of generator 121 is set with first bearing 124 close to the wave producer 12, and relative to first bearing 124
Side is then set with second bearing 125 in the end of the support shaft 1211 of 121 other side of wave producer.
First bearing 124 specifically will be installed on installing mechanism 9, using the main support part as wave producer 121, and
Second bearing 125 then will be installed in the end of eccentric shaft 6, using another rotational support structure as wave producer 121.Wave occurs
The periphery type face of device 121 is oval structure, is then distinguished on the outer peripheral surface of flexbile gear 122 and on the corresponding inner peripheral surface of firm gear 123
It is provided with engaging tooth.When bowlder in the loading flexbile gear 122 of wave producer 121, forces flexbile gear 122 to generate flexible deformation and be also in ellipse
Shape, and it is inserted into the engaging tooth at 122 long axis direction both ends of flexbile gear in the tooth socket in the firm gear 123 of corresponding position as engagement shape
State, and the engaging tooth at the both ends of 122 short-axis direction of flexbile gear is not contacted then with firm gear 123 as disengaged condition.In the driving of motor 8
Under, with the rotation of wave producer 121, between flexbile gear 122 and firm gear 123 constantly engagement and disengage, and via flexbile gear 122 with
Different realize of 123 number of teeth of firm gear is slowed down.
The present embodiment, one end with first bearing 124 of support shaft 1211 is i.e. outer to stretch in installing mechanism 9, and above-mentioned
Big belt pulley 11 be by fixing bolt 15 be mounted on support shaft 1211 with first bearing 124 one end end.Rigid
Being intervally arranged on wheel 123 along its circumferencial direction has multiple through-holes, these through-holes are used for wearing for installation bolt 13 described below
It crosses, installing mechanism 9, firm gear 123 and engine cylinder body 7 is fixed together with this.Center is then provided at the middle part of flexbile gear 122
Hole 1221, and spaced apart multiple through-holes are also equipped with around the centre bore 1221, through-hole herein is then used for described below
Connection bolt 16 pass through, and realize flexbile gear 122 and the connection of the driving member of 6 one end of eccentric shaft be set.
As shown in Figure 4, in the present embodiment eccentric shaft 6 main structure by mandrel 601 and it is above-mentioned be arranged in mandrel
Multiple eccentric wheels on 601 are constituted, and each eccentric wheel is arranged along 601 axially spaced-apart of mandrel, and the decentraction between mandrel 601.Before
Stating and being set to the driving member of 6 one end of eccentric shaft is the flange 603 being set on mandrel 601, is provided in flange 603 penetrating
Suit hole, and flange 603 is one end outer wall being connected via the suit hole inner wall and mandrel 601 is set to flange 603
On spline structure, to realize the connection between flange 603 and mandrel 601.
In addition, the present embodiment is in the interconnecting piece for also being provided with connecting with the flexbile gear 122 in harmonic speed reducer 12 on flange 603.
And referring still to shown in FIG. 1, relative to the one end for the driving member for being connected with the composition of flange 603, mandrel 601 the other end then
It is provided with sensor connecting pin 18, the sensor connecting pin 18 is for constituting between eccentric shaft 6 and the test side of external sensor
Connection, and then can realize the detection to 6 rotation phase of eccentric shaft, to be conducive to improve the control precision of eccentric shaft 6.
Above-mentioned interconnecting piece is specifically the multiple connecting holes around suit hole arrangement being formed on flange 603, each connecting hole
It is respectively corresponded on flexbile gear 122 around each through-hole that centre bore 1221 is arranged, and eventually by being threaded through to just arranging
In connecting hole and through-hole connection bolt 16 realize flange 603 and flexbile gear 122 connection, with this realize harmonic speed reducer 12 and partially
Transmission connection between mandrel 6.
The present embodiment is additionally provided with rolling bearing 604 on flange 603, which is installed on engine cylinder body 7
In, rotation installing of the eccentric shaft 6 in engine cylinder body 7 can be achieved.And setting for the rolling bearing 604 on flange 603
It sets, in engine operation because the power transmitting of multi-link structure acts on, eccentric shaft 6 is whole to will receive radial load, in the load
Lower eccentric shaft 6 can generate moment of flexure, so that eccentric shaft 6 has the tendency that deforming.If depositing without rolling bearing 604 at this time
In the end of, mandrel 601, bounce be will increase, to impact to the flexbile gear 122 of connected harmonic speed reducer 12.But due to rolling
The setting of dynamic bearing 604 can bear the radial force that above-mentioned moment of flexure generates, and to limit the ending pulsation of mandrel 601, and then can guarantee method
Orchid 603 does not glance off and normal rotation, realizes the inhibition deformed to flexbile gear 122 in harmonic speed reducer 12 with this, reaches and mention
It rises 122 operation stability of flexbile gear and improves the purpose in its service life.
In the present embodiment, in the spline structure of connecting flange 603 and mandrel 601, as a kind of preferably embodiment party
Formula may make interior external splines to be felt relieved by major diameter, and be cooperated between the major diameter of interior external splines using small―gap suture.It and is to further avoid
The adverse effect that flexbile gear 122 is operated by eccentric shaft 6, suit hole and mandrel 601 of the present embodiment on flange 603 have
It may also set up the limiting slot of corresponding arrangement on the inner wall and outer wall of above-mentioned spline structure.The limiting slot specifically can be by being just arranged in
In suit hole and mandrel 601, and two limiting slots being fastened on together are formed, and are additionally provided with circlip in the limiting slot.
And the circlip is in structure design, and the thickness axial along mandrel 601 is also the width less than limiting slot
Degree setting, not only can constrain flange 603 relative to the axial movement of mandrel 601 by the circlip with this, heavier
What is wanted is the width for being less than limiting slot by the thickness axial along mandrel 601 of circlip, then can also make mandrel 601 opposite
There is certain axial activity surplus in flange 603, being sent out with not will lead to flange 603 when axial float occurs for mandrel 601
Raw corresponding shift in position, and then can be avoided the soft of the harmonic speed reducer 12 that the axial movement of mandrel 601 connects flange 603
Wheel 122 impacts.
The present embodiment should be noted that the generation to avoid positioning phenomenon, to prevent circlip and flange 603 from sending out
Raw clamping stagnation, mandrel 601 is relative between the axially-displaceable momentum namely circlip thickness and limit groove width of flange 603
Difference should be not less than the design axial movement value of eccentric shaft 6.And it is further, to be convenient for circlip in set in assembly
Fill hole in installing, suit hole for circlip insertion one end can carry out chamfering, while for the benefit of circlip abjection with
Convenient for the disassembly of flange 603, the inner wall close to the suit Hole chamfering one end of the limiting slot in suit hole is also designed to phase
The guide surface axially inclined for mandrel 601, and the angle between 601 axial direction of the guide surface and mandrel is preferably obtuse angle.
As a result, by the chamfering at the port of suit hole one end, when assembly, can be light by circlip via the guiding of the chamfering
It is directly that flange 603 is outside because there is the setting of above-mentioned guide surface in easy indentation limiting slot, and when needing to dismantle flange 603
Drawing can be such that circlip deviates under the guiding role of guide surface, to realize the disengaging between flange 603 and mandrel 601.
In the present embodiment, bearing mounting hole 605 is then provided in the end of mandrel 601, and support shaft 1211 is close to bias
The second bearing 125 of 6 one end of axis is mounted in the bearing mounting hole 605, furthermore in mandrel 601, is installed adjacent to bearing
Hole 605, namely it is additionally provided with oil-through hole 606 in the inside of the bearing mounting hole 605, while being additionally provided with inside mandrel 601
The main oil gallery 602 axially arranged along mandrel 601.The main oil gallery 602 and oil-through hole 606 belong to the lubrication being set in eccentric shaft 6
A part of oil duct, will be illustrated below.
In addition, still such as Fig. 4, and be incorporated into it is shown in Fig. 2, in addition to making the support shaft in harmonic speed reducer 12 in the present embodiment
1211 one end with second bearing 125 are inserted in eccentric shaft 6 close to one end of harmonic speed reducer 12, and second bearing is installed
In 601 end of mandrel, to be supported to wave producer 121.It is soft with the harmonic speed reducer 12 being connected for guarantee eccentric shaft 6
The considerations of taking turns the concentricity between 122 reduces the deformation of flexbile gear in the process of running to reach, and reducing flexbile gear abrasion promotion, it makes
With the purpose in service life.One end for being connected with flange 603 of mandrel 601 may be configured as stretching out in outside the flange 603 in the present embodiment,
To form the protruding end protruded relative to flange 603.
The outer diameter namely mandrel 601 of the protruding end of mandrel 601 have in the major diameter and flexbile gear 122 at the end of spline structure
Centre bore 1221 internal diameter it is identical, meanwhile, the protruding end of 601 end of mandrel is also inserted in the centre bore 1221 on flexbile gear 122
It is interior, mandrel 601 is passed through to the radial positioning of flexbile gear 122 with this, just can satisfy coaxial between the two to flexbile gear 122 and eccentric shaft 6
The guarantee of degree, and then reduce the deformation that flexbile gear 122 may occur.
The structure of the engine cylinder body 7 of the present embodiment is as shown in Figure 5, in engine cylinder body 7 close to harmonic reduction
The end of device 12 is provided with firm gear mounting hole 701, and a part of firm gear 123, which is embedded in, to be fixed in the firm gear mounting hole 701, and
The firm gear mounting hole 701 together, can piece together complete with the firm gear mounting hole 903 in the installing mechanism 9 that will be described below
For accommodating the cavity of firm gear 123, fixation of the firm gear 123 between installing mechanism 9 and engine cylinder body 7 is realized with this.
Be additionally provided on engine cylinder body 7 it is concentric with firm gear mounting hole 701, and relative in firm gear mounting hole 701
The heavy bearing mounting hole 702 being set to engine cylinder body 7 inside, the rolling bearing 604 being set on above-mentioned flange 603 is to pacify
In the bearing mounting hole 702.In addition, also ladder-like with one section between bearing mounting hole 702 and firm gear mounting hole 701
Hole, the position being somebody's turn to do between bearing mounting hole 702 and firm gear mounting hole 701 are then used to accommodate the flexbile gear in harmonic speed reducer 12
122.In the actual processing of engine cylinder body 7, to guarantee bearing mounting hole 702, firm gear mounting hole 701 and between the two
Stepped hole between concentricity, which is preferably integrally machined using forming cutter.
What the present embodiment and bearing mounting hole 702 connected is then mandrel mounting hole 703, and the mandrel 601 in eccentric shaft 6 is
It is threaded through in the mandrel mounting hole 703, to realize the rotation setting in engine cylinder body 7.In addition, the present embodiment corresponds to core
Shaft mounting hole 703, be additionally provided in engine cylinder body 7 be connected with the lubricant passage way being configured in engine cylinder body 7 into
Oilhole 706, under the pump oil of engine oil pump, lubricating oil can be entered the main oil gallery 602 in mandrel 601 by the fuel feed hole 706
In, with the lubrication for eccentric shaft 6 and harmonic speed reducer 12 etc..
For the connection between the main oil gallery 602 in above-mentioned fuel feed hole 706 and mandrel 601, one kind is used as in the present embodiment
Exemplary structure, such as the oilhole radially arranged along mandrel 601 can be opened up on mandrel 601, and in the oilhole and mandrel 601
Main oil gallery 602 is connected to, while on the outer peripheral surface of mandrel 601, is also opened up in the position for being provided with the oilhole circumferential along mandrel 601
The oil groove of arrangement, oil groove can be 360 ° of complete cycle settings, can also open up for non-complete cycle, and the oil groove is also with setting in engine cylinder
Fuel feed hole 706 on body 7 is to positive arrangement.To just can be realized the main oil gallery 602 inside fuel feed hole 706 and mandrel 601 with this
Between connection, and can also be remained in fuel feed hole 706 and mandrel 601 when eccentric shaft 6 rotates by the setting of oil groove
Connection between portion's oil circuit.
The main oil gallery 602 and oil-through hole 606 that are set on mandrel 601 and above-mentioned oilhole and oil groove constitute position
In on eccentric shaft 6, and the eccentric slinger being connected to lubricant passage way in engine cylinder body 7, and the bias slinger also with it is described
It is connected in harmonic speed reducer 12, to carry out the lubrication of harmonic speed reducer 12.And in addition to fuel feed hole 706, it is incorporated into shown in Fig. 6
, the present embodiment is additionally provided with oil return hole 704 and venthole corresponding to the position of harmonic speed reducer 12 on engine cylinder body 7
705.The oil return hole 704 is to connect the crankcase in 12 inside of harmonic speed reducer and engine cylinder body 7 with venthole 705
It is logical, with the ventilation being able to carry out between the oil return of lubricating oil and harmonic speed reducer 12 and crankcase.
In the present embodiment, in the arrangement of oil return hole 704 and venthole 705, it is noted that make harmonic speed reducer 12
In store a certain amount of lubricating oil, and then ensure the realization of continuous lubrication, the bottom of oil return hole 704 should be higher than that harmonic speed reducer
The minimum point of flexbile gear 122 in 12, meanwhile, oil return hole 704 preferably also should be higher than that the inner circle of the outer ring minimum point of rolling bearing 604
Face, can also lubricate 604 continuous and effective of rolling bearing.
In addition, the section of oil return hole 704 also need to open up it is sufficiently large, to guarantee to enter harmonic speed reducer when oil pressure is larger
Lubricating oil in 12 can be flowed back to smoothly in crankcase, avoided oil return unsmooth and made to retain a large amount of lubricating oil in retarder, in turn
Influence the transmission efficiency of retarder.For venthole 705, the venthole 705 pays attention to making it in setting in the present embodiment
Higher than lubricating oil liquid level height in harmonic speed reducer 12 and crankcase inner engine oil liquid level maximum height.It can be protected with this
The pressure demonstrate,proved above retarder internal oil is consistent with crankcase, and avoids the big oil return for influencing retarder of pressure in crankcase.
In the present embodiment, installing mechanism 9 is preferred as shown in Figure 1 by the mounting base connecting with engine cylinder body 7, with
And the shell being connected in the mounting base is constituted.Wherein, as shown in Figure 7 and Figure 8, it is provided in mounting base also as arranged concentric
Bearing mounting hole 901, seal mounting hole 902 and firm gear mounting hole 903, three concentric holes for mounting base one end, and
It is then provided with the motor shaft via hole 901 of penetrating arrangement in the other end of mounting base, and ring motor shaft via hole 904 is placed with multiple use
In the structure of mounting hole that motor 8 is installed, the inside edge of ring firm gear mounting hole 903, which is then placed with, multiple to be passed through for installing bolt 13
Structure of mounting hole, and around the edge of mounting base entirety be also placed with it is spaced apart it is several for shell in mounting base it is fixed
Structure of mounting hole.
In above-mentioned each pore structure, bearing mounting hole 901 is the installation for first bearing 124 to support support shaft 1211,
Seal mounting hole 902 is used for the oil sealing 14 being positioned between support shaft 1211 and installing mechanism 9, to avoid lubricating oil leakage
Influence the normal use of belt.Firm gear mounting hole 903 carries out the arrangement of firm gear 123 as previously described, motor shaft via hole 904 and another
The centerline parallel of outer three concentric holes, this namely realize the biasing in side of motor 8 above-mentioned relative to support shaft 1211.
The shell of the present embodiment is then specially one with inner cavity and toward the shell structure of the side of mounting base opening, such as
This is just housed in the shell by the reduction gearing mechanism that two belt pulleys and belt 10 are constituted, and to reach dustproof and waterproof, is helped
In the effect for promoting reduction gearing mechanism service life.And it is the leakproofness guaranteed inside harmonic speed reducer 12, prevent lubricating oil
External engine is leaked to, in addition to the setting of oil sealing 14, is also equipped with gasket seal between mounting base and engine cylinder body 7
17, the gasket seal 17 is using conventional high temperature resistant gasket.
In addition, it may also be noted that above-mentioned reduction gearing mechanism in addition to belt transmissioning mode can be used, certainly its
Chain drive structure or gear transmission structure can be used, it is reliable between motor 8 and harmonic speed reducer 12 to can be realized
Deceleration transmission.
In the present embodiment, to enter the lubricating oil in eccentric shaft 6 can in harmonic speed reducer 12, with foregoing real
Now to the lubrication of harmonic speed reducer 12.As a kind of feasible oil communication mode, it is incorporated into shown in Fig. 9 and Figure 10, this
Embodiment may make that the internal diameter of oil-through hole 606 is between the inner ring outer diameter and outer ring internal diameter of second bearing 125, thus in work
Lubricating oil is ejected into second bearing 125 from the main oil gallery 602 in mandrel 601 through oil-through hole 606 in work, and lubricating oil can be bearing
125 lubrications.Meanwhile because having certain interval between the Internal and external cycle of bearing 125, the lubricating oil with pressure can by this gap into
Enter in harmonic speed reducer 12.
And in harmonic speed reducer 12, the cavity between flexbile gear 122 and wave producer 121 forms oil pocket a, wave producer
121 form oil pocket b with mounting base, the triangular cavity of firm gear 123, and the cavity between flexbile gear 122 and engine cylinder body 7 forms oil
Chamber c.Lubricating oil is entered at 122 inside oil pocket a of flexbile gear by the gap in second bearing 125 itself, due to wave producer 121 outside
All type faces and flexbile gear 122 cooperate, therefore 121 periphery type face of lubricating oil Castor Oil wave producer.Lubrication buildup in oil pocket a is certain
It can be flowed into oil pocket b by 121 internal bearing clearance of wave producer after oil mass.It is nibbled between flexbile gear 122 and firm gear 123 by tooth
It closes, because of the deformation of flexbile gear 122, only has a small amount of tooth to be meshed between flexbile gear 122 and firm gear 123, therefore lubricating oil can also be by not nibbling
The backlash part of conjunction enters oil pocket c.There is certain lubricating oil in oil pocket b and c, when 121 high speed rotation of wave producer, drives
It can be lubricated on lubricating oil splash to first bearing 124 for bearing 124.Lubricating oil after lubrication can pass through gravity oil return
Mode from oil return hole 704 return crankcase in.
And in addition to such as above-mentioned gap by second bearing 125 itself, so that lubricating oil enters harmonic speed reducer
In 12, the present embodiment as shown in fig. 11 and fig, can also design one end so that in the insertion eccentric shaft 6 of support shaft 1211
End directly connect with the main oil gallery 601 in mandrel 601, namely save oil-through hole 606, and in the insertion of support shaft 1211
The blind hole 12111 being connected to main oil gallery 602 is arranged in one end in eccentric shaft 6, and the blind hole 12111 is then by being configured in support shaft
It is connected inside intercommunicating pore and harmonic speed reducer 12 obliquely or vertically on 1211.
The variable compression ratio of the present embodiment by installing mechanism 9 design so that 8 lateral arrangement of motor and can save
Axial space, can overcome the shortcomings of that existing driving mechanism occupied space is big, meanwhile, it is mounted on installing mechanism by motor 8,
Also it can avoid the problem of it is installed on engine cylinder body 7 and cylinder body mode is caused to be deteriorated, furthermore pass through 6 inner eccentric shaft of eccentric shaft
The design of 7 upper oil hole of lubrication channel and engine cylinder body, can also realize the effectively lubricating to harmonic speed reducer 12 etc., so as to make
Obtaining the variable compression ratio has good practicability.
Embodiment two
The present embodiment is related to a kind of variable compression ratio engine comprising engine cylinder body, and further include starting in described
The variable compression ratio in embodiment one being arranged at machine cylinder body.The variable compression ratio engine of the present embodiment is by using reality
The variable compression ratio in example one is applied, can overcome the shortcomings of that existing driving mechanism occupied space is big, and also can avoid bias
Axis driving motor is mounted on engine cylinder body the problem of causing cylinder body mode to be deteriorated, and has good practicability.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Within the spirit and principle of utility model, any modification, equivalent replacement, improvement and so on should be included in the utility model
Protection scope within.
Claims (10)
1. a kind of variable compression ratio, including sliding the piston (1) being set in the cylinder barrel in engine cylinder body (7), rotation is set
The crankshaft is loaded on the eccentric shaft (6) and turning set with eccentric wheel in the crankshaft (4) on the engine cylinder body (7)
(4) the adjusting connecting rod (3) on, the execution connecting rod (2) being articulated between the piston (1) and described one end for adjusting connecting rod (3),
And the drive link (5) being articulated between the eccentric shaft (6) and the other end for adjusting connecting rod (3)；It is characterized by: institute
State variable compression ratio engine further include:
Driving member is connected at one end of the eccentric shaft (6)；
Harmonic speed reducer (12) corresponds to the driving member and is arranged on the engine cylinder body (7), and the harmonic speed reducer
(12) flexbile gear (122) in is connected with driving member transmission；
Installing mechanism (9), the side of Yu Suoshu harmonic speed reducer (12) is fixedly connected on the engine cylinder body (7), described
It is stretched in the installing mechanism (9) outside support shaft (1211) one end of wave producer (121) in harmonic speed reducer (12), and in
The motor (8) that side is offset to relative to the support shaft (1211) is fixedly installed on the installing mechanism (9), and in described
Motor (8) and the support shaft (1211), which are placed between one end in the installing mechanism (9), is equipped with reduction gearing mechanism.
2. variable compression ratio according to claim 1, it is characterised in that: the reduction gearing mechanism be chain conveyer,
One of belt transmission or gear transmission structure.
3. variable compression ratio according to claim 1, it is characterised in that: Yu Suoshu support shaft (1211) stretches in institute
It states one end in installing mechanism (9) and is set with the first bearing (124) being set on the installing mechanism (9), relative to stretching in
The other end of one end in the installing mechanism (9), the support shaft (1211) is inserted in the eccentric shaft (6), and in
One end in the insertion eccentric shaft (6) of the support shaft (1211) is set be set in the eccentric shaft (6) in the
Two bearings (125).
4. variable compression ratio according to claim 3, it is characterised in that: the firm gear in the harmonic speed reducer (12)
(123) fixation is folded between the installing mechanism (9) and the engine cylinder body (7), and in the installing mechanism (9) and institute
It states and is folded between engine cylinder body (7) gasket seal (17), set between Yu Suoshu support shaft (1211) and the installing mechanism (9)
It is equipped with oil sealing (14).
5. variable compression ratio according to claim 1, it is characterised in that: the driving member is the method with suit hole
Blue (603), and the flange (603) is by being configured in the suit hole inner wall and the spline structure on the eccentric shaft (6) outer wall
Suit is connected on the eccentric shaft (6), and the interconnecting piece connecting with the flexbile gear (122) is equipped in the flange (603).
6. variable compression ratio according to claim 5, it is characterised in that: Yu Suoshu flange is set with structure on (603)
At the eccentric shaft (6) in the rolling bearing (604) for rotating setting on engine cylinder body (7).
7. variable compression ratio according to claim 1, it is characterised in that: the eccentric shaft (6) is connected with the biography
One end of moving part is protruded relative to the driving member to be arranged, and the outer diameter of the protruding end of the eccentric shaft (6) and the flexbile gear
(122) internal diameter of centre bore (1221) is identical and is inserted in the centre bore (1221).
8. variable compression ratio according to claim 1, it is characterised in that: relative to being connected with the one of the driving member
End, the other end of Yu Suoshu eccentric shaft (6), which is equipped with, constitutes the sensing that the eccentric shaft (6) connect with the test side of external sensor
Device connecting pin (18).
9. variable compression ratio according to any one of claim 1 to 8, it is characterised in that: the installing mechanism (9)
Including the mounting base being connected with the engine cylinder body (7), and the shell being connected in the mounting base, and the support shaft
(1211) by the installation seat supports, the motor (8) is fixed in the mounting base, and the reduction gearing mechanism is contained in institute
It states in shell.
10. a kind of variable compression ratio engine, including engine cylinder body, it is characterised in that: further include in the engine cylinder body
Locate the variable compression ratio as claimed in any one of claims 1-9 wherein of setting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822240990.2U CN209557102U (en) | 2018-12-28 | 2018-12-28 | Variable compression ratio and variable compression ratio engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822240990.2U CN209557102U (en) | 2018-12-28 | 2018-12-28 | Variable compression ratio and variable compression ratio engine |
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| CN209557102U true CN209557102U (en) | 2019-10-29 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112502828A (en) * | 2020-02-24 | 2021-03-16 | 长城汽车股份有限公司 | Variable compression ratio drive structure |
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2018
- 2018-12-28 CN CN201822240990.2U patent/CN209557102U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112502828A (en) * | 2020-02-24 | 2021-03-16 | 长城汽车股份有限公司 | Variable compression ratio drive structure |
| CN112502828B (en) * | 2020-02-24 | 2022-01-28 | 长城汽车股份有限公司 | Variable compression ratio drive structure |
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