CN205895408U - Formula internal -combustion engine variable compression ratio mechanism is adjusted to ring gear - Google Patents

Abstract

Formula internal -combustion engine variable compression ratio mechanism is adjusted to ring gear belongs to the engine technology field, the utility model discloses well location platform rigid coupling is connected in ring gear upper portion left side, the I percutaneous area of belt gear and the belt gear II that the phase setting was organized of bent axle group, and the gear I and the inside tooth of gear II and ring gear of bent axle group mesh, and the gear III and the outside tooth of ring gear of the synchronous group of rotational speed mesh, the helical gear I of the synchronous group of rotational speed and II meshings of helical gear of phase setting group, the utility model discloses the pressure scaling that can realize the internal -combustion engine is variable in succession, compact structure, installation space is little, rational utilization installation space is arranged with balanced axle space in usable internal -combustion engine timing belt space.

Description

Gear ring adjustable type internal-combustion engine variable compression ratio mechanism

Technical field

This utility model belongs to technical field of engines and in particular to a kind of gear ring adjustable type internal-combustion engine variable compression ratio machine Structure.

Background technology

Compression ratio determines the pressure that gasoline engine compresses gaseous mixture, and the combustion characteristics of gasoline result in petrolic mixing Closing atmospheric pressure can not be too high.If the pressure in cylinder has exceeded marginal value, gasoline will because of compression before ignition by Light, this phenomenon is referred to as detonation, and produces pinking, electromotor can be brought with very big injury.For extensively applying now Engine with supercharger, when turbocharging intervention after, the temperature and pressure of combustor can significantly raise, if this value mistake Height, pinking is just inevitable.This can cause huge injury to electromotor, also can affect power output simultaneously.So, fixing compression The turbocharging of ratio and mechanically-sapercharged engine can only be designed to compression ratio more lower than common naturally aspirated engine.But This too low compression ratio design, can lead to again electromotor when particularly turbocharging does not completely intervene supercharger namely Say, in the slow-speed of revolution, efficiency of combustion is very low for electromotor, the power that can produce is than produced by common naturally aspirated engine Power wants much less.

In addition, changeable compression ratio technique can allow electromotor have big advantage in terms of fuel oil adaptability.Now new The compression ratio common design of the prevailing engine of money in more than 10:1, to obtain more preferable power output and fuel economy.But It is the fuel oil using relatively high grade for the electromotor needs of high compression ratio, this requirement can reduce the adaptation in remote sites for the automobile Property, have influence on the sale of vehicle.

Content of the invention

The purpose of this utility model is to provide the mechanism of a kind of variable compression ratio, compact conformation.

This utility model is made up of bent axle group a, synchronization group b, phase adjusted group c, belt 1, positioning table 2 and gear ring 3, Wherein positioning table 2 is fixed in gear ring 3 upper left-hand, the belt gear 10 of the bent axle group a belt through belt 1 and phase adjusted group c Gear 40 connects, and the gear 6 of bent axle group a and gear 8 are engaged with gear ring 3 inner teeth, the gear 32 of synchronization group b Engage with gear ring 3 external teeth；The helical gear 33 of synchronization group b is engaged with the helical gear 41 of phase adjusted group c.

Described bent axle group a is by trunnion assembly d, maneton assembly e, crank assemblies f, snap ring 4, bearing 5, gear 6th, bearing 7, gear 8, axle journal 9 and belt gear 10 form,

By trunnion 12, boss 13 and crank 14 is affixed from left to right forms for described trunnion assembly d, wherein main shaft Annular groove 21 and keyway 11 are provided with from left to right on neck 12；The concave station 16 on crank 14 top is provided with hole 15, under crank 14 The concave station 18 in portion is provided with counterbore 17, and the concave station 20 of crank 14 bottom is provided with counterbore 19；

By left axle 27, axis 29 and right axle 30 is affixed from left to right forms for described maneton assembly e, wherein left axle 27 are provided with keyway 28；

By crank 23 and trunnion 24 is affixed forms for described crank assemblies f, and wherein crank 23 top is provided with hole ⅱ22；Snap ring 4, belt gear 10 and bearing 5 are sequentially arranged on the trunnion 12 of trunnion assembly d from left to right, its The inner ring of middle (center) bearing 5 and trunnion 12 interference fit, belt gear 10 is bonded with the keyway 11 of trunnion 12, snap ring 4 are fixed in the annular groove 21 of trunnion 12；Gear 8 is through the counterbore 17 in axle journal 9 and trunnion assembly d and counterbore 19 It is flexibly connected；Gear 6 is bonded with the keyway 28 of left axle 27 in maneton assembly e, the left part of left axle 27 and trunnion In assembly d, the hole 15 of crank 14 is flexibly connected, the hole of right axle 30 and crank 23 in crank assemblies f in maneton assembly e 22 flexible connections；The inner ring of bearing 7 and trunnion 24 interference fit of crank assemblies f.

Described synchronization group b is made up of synchronizing shaft g, bearing 31, gear 32, helical gear 33, bearing 34,

Described synchronizing shaft g is by left axle 35, axis 37, right axle 39 is affixed forms, and axis 37 is suitable from left to right Sequence is provided with keyway 36 and keyway 38；Bearing 31 is located at left axle 35, the inner ring of bearing 31 and the left axle of synchronizing shaft g 35 interference fit；Gear 32 is bonded with the keyway 36 of axis 37 on synchronizing shaft g, on helical gear 33 and synchronizing shaft g in The keyway 38 of axle 37 is bonded；Bearing 34 is located at the right axle 39 of synchronizing shaft g, the inner ring of bearing 34 and right axle 39 Interference fit.

Described phase adjusted group c is by adjustment axis h, stepper assemblies i, belt gear 40, helical gear 41, bearing 42nd, bearing 43 and bearing 44 form；

Described adjustment axis h are provided with keyway 45, ring tooth 46 and keyway 47 from left to right；

Described stepper assemblies i is made up of motor 48, key 49, motor shaft 50 and regulation gear 51；Adjust tooth Wheel 51 is affixed with the outer end of motor shaft 50 through key 49；Order is arranged from left to right for bearing 44, belt gear 40 and bearing 43 It is listed in adjustment axis h left end；Its middle (center) bearing 44 and bearing 43 inner ring are flexibly connected with adjustment axis h, belt gear 40 and key Groove 45 is bonded；Adjust gear 51 in stepper assemblies i to engage with the ring tooth 46 of adjustment axis h, helical gear 41 and tune On nodal axisn h, keyway 47 is bonded；Bearing 42 is located at the right-hand member of adjustment axis h, and bearing 42 inner ring is with the activity of adjustment axis h even Connect.

Variable compression ratio of the present utility model include bent axle group a, synchronization group b, phase adjusted group c, belt 1, Positioning table 2 and gear ring 3.

Compression ratio stationary state:

Each several part is driven the belt gear 10 that situation is bent axle group a and the belt gear 40 of phase adjusted group c passes through skin Band 1 transmission, rotating speed size is identical, direction is identical；The helical gear 41 of phase adjusted group c and the helical gear 33 of synchronization group b Engaged transmission, gear ratio is 1:2, and rotary speed direction is contrary, and gear 32 and the gear ring 3 external tooth engaged transmission of synchronization group b pass Dynamic ratio is 2:1, and rotary speed direction is contrary；Now, the rotating speed size and Orientation of phase adjusted group c is identical with gear ring 3；Gear ring 3 internal tooth Engage with gear 6, gear 6 angle and gear ring 3 angle not relative to change that is to say, that the axle center of maneton assembly e with bent The axle center distance of axle group a does not change relatively, and compression ratio is constant.

Compression ratio variable condition:

Regulation gear 51 is driven to rotate clockwise by the motor shaft 50 of motor 48 in stepper assemblies i, adjustment axis h Helical gear 41 is driven to be moved to the left, from helical gear engaged transmission principle, helical gear 41 is moved to the left, helical gear 33 Rotation phase shifts to an earlier date, and leads to synchronization group b phase place to shift to an earlier date, and now, gear ring 3 phase place being meshed with gear 32 is also shifted to an earlier date, Gear ring 3 makes gear 6 bent axle group a relatively rotate, and leads to the axle center of maneton assembly e to produce with the axle center distance of bent axle group a Relatively change, and then lead to combustion chamber volume to change, compression ratio changes.

Adjust gear 51 to rotate counterclockwise in the same manner.

The beneficial effects of the utility model are:

1. can achieve compression ratio of internal-combustion engine continuous variable.

2. compact conformation, installing space is little.

3. can be arranged with balance shaft space using internal combustion engine Timing Belt space, rationally utilize installing space.

Brief description

Fig. 1 is the front view of gear ring adjustable type internal-combustion engine variable compression ratio mechanism

Fig. 2 is the left view of gear ring adjustable type internal-combustion engine variable compression ratio mechanism

Fig. 3 is the front view of bent axle group a

Fig. 4 is the left view of bent axle group a

Fig. 5 is the structural representation of snap ring

The structural representation of Journal housing d based on Fig. 6

Fig. 7 is the structural representation of crank assemblies f

Fig. 8 is the structural representation of axle journal 9

Fig. 9 is the front view of maneton assembly e

Figure 10 is the left view of maneton assembly e

Figure 11 is crank 23 structural representation

Figure 12 is j-j section view in Fig. 3

Figure 13 is the front view of synchronization group b

Figure 14 is the left view of synchronization group b

Figure 15 is the structural representation of synchronizing shaft g

Figure 16 is the front view of phase adjusted group c

Figure 17 is the left view of phase adjusted group c

Figure 18 is the structural representation of adjustment axis h

Figure 19 is the structural representation of stepper assemblies i

Figure 20 is the front view that bent axle group a and synchronization group b are driven by belt 1

Figure 21 is the left view that bent axle group a and synchronization group b are driven by belt 1

Figure 22 is that synchronization group b passes through gear ring 3 and bent axle group a engaged transmission front view

Figure 23 is k-k section view in Figure 22

Figure 24 is synchronization group b and phase adjusted group c drive mechanism schematic diagram

Wherein: a. bent axle group b. synchronization group c. phase adjusted group d. trunnion assembly e. maneton assembly f. Crank assemblies g. synchronizing shaft h. adjustment axis i. stepper assemblies 1. belt, 2. positioning table, 3. gear ring, 4. snap ring 5. axle Hold 6. gear, 7. bearing, 8. gear, 9. axle journal, 10. belt gear, 11. keyway, 12. trunnion 13. boss 14. crank, 15. hole, 16. concave station, 17. counterbore, 18. concave station, 19. counterbore, 20. concave station, 21. annular groove 22. hole 23. crank, 24. trunnion, 25. annular groove, 26. annular groove, 27. left axle, 28. keyway, 29. axis 30. is right Axle 31. bearing, 32. gear, 33. helical gear, 34. bearing, 35. left axle, 36. keyway 37. axis 38. Keyway 39. right axle, 40. belt gear, 41. helical gear, 42. bearing, 43. bearing, 44. bearing 45. key Groove 46. ring tooth, 47. keyway, 48. motor, 49. key, 50. motor shaft 51. adjusts gear

Specific embodiment

Below in conjunction with the accompanying drawings this utility model is described in detail:

As depicted in figs. 1 and 2: the internal tooth of belt 1 is driven with belt gear 10 and belt gear 40 respectively, belt teeth Wheel 10 is identical with belt gear 40 number of teeth, and belt gear 10 is identical with belt gear 40 rotating speed, turns to identical, bent axle group A is identical with phase adjusted group c rotating speed, turns to identical.

Gear ring 3 internal tooth is engaged with gear 6 gear 8 respectively, gear ring 3 external tooth and gear 32 external toothing, and gear ring 3 passes through Gear 32 carries out phase rotator regulation, and then changes gear 6 phase rotator.

Positioning table 2 is processed on engine body, and together with connecting rod, gear ring 3 is played with axially position effect.

As shown in Figures 3 to 12:

Snap ring 4 is affixed with trunnion assembly d trunnion 12 left side annular groove 21, and snap ring 4 and bearing 5 limit belt teeth The axial location of wheel 10.

Bearing 5 is machined on engine body, between belt gear 10 and positioning table 2, limits trunnion 12 axle Heart position, bearing 5 inner ring is with trunnion 12 interference fit it is ensured that trunnion 12 is freely rotatable.

The belt gear 10 of trunnion 12 left end can substitute engine belt pulley, trunnion 12 right side and positioning table 2 Affixed, the effect of positioning table 2 is, by bearing 5, trunnion 12 is played with axially position effect.

Keyway 11 is located on the left of trunnion 12, trunnion 12 and belt gear 10 is carried out bonded.

Hole 15 is machined in crank 14 rod journal end, and hole 22 is machined in crank 23 rod journal end, hole 15 and hole 22 play radial positioning effect together to maneton assembly e, and hole 15 and maneton assembly e left axle 27 are flexibly connected, hole 22 It is flexibly connected it is ensured that maneton assembly e is freely rotatable with maneton assembly e right axle 30.

Concave station 16 is machined in crank 14 rod journal end, to gear 6 together with the left of maneton assembly e axis 29 Axially position acts on it is ensured that gear 6 right position is fixed.

Keyway 28 is machined in maneton assembly e left axle 27, and effect is by gear 6 and maneton assembly e left axle 27 Carry out bonded.

Maneton assembly e rotates, turning crankshaft neck assembly e with the rotation of gear 6, makes maneton assembly e axle center and master The relative distance in axle journal 12 and trunnion 24 axle center changes, thus change burning room volume, the bigger compression of relative distance Ratio is bigger, and relative distance more small reduction ratio is less, and then obtains the change of compression ratio.

Concave station 18 and concave station 20 play axially position effect, concave station 18 and 20 liang of side planes of concave station to gear 8 It is flexibly connected it is ensured that gear 8 axial restraint respectively with gear 8.

Counterbore 19 is machined on concave station 20, and counterbore 17 is machined on concave station 18, counterbore 19 and counterbore 17 1 Play and axle journal 9 is played with radial positioning effect, counterbore 19 and counterbore 17 are respectively with axle journal 9 and are flexibly connected it is ensured that axle journal 9 is free Rotate.

In gear 8, the two is to be flexibly connected it is ensured that gear 8 is freely rotatable to axle journal 9.

The annular groove 25 of axle journal 9 left end and the annular groove 26 of axle journal 9 right-hand member, carry out snap ring axially position to axle journal 9 jointly.

Crank 23 is located on the left of trunnion 24, and the two is affixed, and crank 23 is flexibly connected with bearing 7.

Trunnion 24 right-hand member can connect engine flywheel or other cylinder cranks.

Bearing 7 is machined on engine body, and on the right side of crank 23, the inner ring of bearing 7 is with crank assemblies f's Trunnion 24 interference fit, the trunnion 24 axially and radially positioning action to crank assemblies f, ensure main shaft simultaneously Neck 24 is freely rotatable.

As shown in Figure 13 and Figure 14:

Belt gear 10 effect is by belt 1, belt gear 40 to be driven, belt gear 10 and belt teeth Take turns 40 numbers of teeth identical, belt gear 10 is identical with belt gear 40 rotating speed, turn to identical.

Gear 6 and gear ring 3 internal tooth engaged transmission, gear ring 3 changes the relative angle of gear 6 and bent axle group a.

Gear 8 is located in the concave station 18 and concave station 20 in the middle part of crank 14 balance weight end, compact conformation.Gear 8 Engage it is ensured that gear ring 3 and trunnion 12 and trunnion 24 is concentric rotates together with gear 6 with gear ring 3 internal tooth.

As shown in FIG. 13 to 15:

Described synchronizing shaft g is by left axle 35, axis 37, right axle 39 is affixed forms, and axis 37 is suitable from left to right Sequence is provided with keyway 36 and keyway 38；

Synchronizing shaft g two ends connect balance weight, balance two-stage reciprocating inertia force.

Bearing 31 is machined on engine body, positioned at the left axle 35 of synchronizing shaft g, the inner ring of bearing 31 and left axle 35 interference fit, bearing 34 is machined on engine body, positioned at the right axle 39 of synchronizing shaft g, the inner ring of bearing 34 With right axle 39 interference fit, bearing 31 limits synchronizing shaft g radial position together with bearing 34.

The effect of axis 37 keyway 36 is that synchronizing shaft g and gear 32 carry out bonded, synchronizing shaft g and gear 32 is affixed.

The effect of axis 37 keyway 38 is that synchronizing shaft g and helical gear 33 carry out bonded, synchronizing shaft g and helical teeth Take turns 33 affixed.

Helical gear 33 and helical gear 41 engaged transmission, helical gear 41 is 2:1 with helical gear 33 gear ratio, by changing The axial location becoming helical gear 41 is changing helical gear 33 rotation phase being meshed.

As shown in Figure 16 to Figure 19:

The effect of adjustment axis h left end keyway 45 is that with belt gear 40, adjustment axis h are carried out bonded, adjustment axis h Axially it is flexibly connected with belt gear 40.

Adjustment axis h left end belt gear 40 shares belt 1 with engine timing system, adjustment axis h right-hand member no other zero Part.

Bearing 44 is machined on engine body, and on the left of belt gear 40, bearing 43 is machined in electromotor On body, on the right side of belt gear 40, it is flexibly connected with belt gear 40 and adjustment axis h respectively, bearing 44 and axle Hold the axial location of 43 common restriction belt gears 40 and the radial position of adjustment axis h.

Keyway 47 is located on the right side of ring tooth 46, and its effect is that adjustment axis h and helical gear 41 carry out bonded, regulation Axle h is affixed with helical gear 41.

Bearing 42 is machined on engine body, positioned at adjustment axis h right-hand member, is flexibly connected with adjustment axis h, and it is risen Radial positioning acts on.

Key 49 is located at stepper assemblies i motor shaft 50 front end, and its effect is to be bonded motor shaft 50 with adjusting gear 51 Connect, motor shaft 50 is affixed with regulation gear 51.

Adjust gear 51 to be rotated by the motor 48 drive motor axle 50 of stepper assemblies i.

Stepper assemblies i motor 48 on engine body, to adjust 51 gearings of gear.

As shown in Figure 22 and Figure 23:

Gear 32 and gear ring 3 external tooth engaged transmission, gear ratio is 2:1, changes gear 32 by helical gear 33 and rotates Phase place and then regulation gear ring 3 rotation phase.

As shown in Figure 20, Figure 21 and Figure 24:

Ring tooth 46 engages with adjusting gear 51, in terms of stepper assemblies i motor shaft 50 to motor 48 direction, adjusts Section gear 51 rotates clockwise, and adjustment axis h with ring tooth 46 are moved to the left, and adjusts gear 51 and rotates counterclockwise, with ring Adjustment axis h of shape tooth 46 move right.

Helical gear 41 and helical gear 33 engaged transmission, gear ratio is 1:2, turns to contrary, when adjustment axis h drive helical teeth When wheel 41 is moved to the left, the rotation phase of helical gear 33 is delayed, and synchronization group b rotation phase is delayed, when adjustment axis h band When dynamic helical gear 41 moves right, the rotation phase of helical gear 33 shifts to an earlier date, and synchronization group b rotation phase shifts to an earlier date.

Compression ratio control process:

As shown in Fig. 2 when electromotor operates, bent axle group a and synchronization group b operate along pointer, and phase adjusted group c is inverse Hour hands operate；Belt gear 40 is driven by belt 1 with belt gear 10, and gear ratio is 1:1, and rotating speed size is identical, turns to Identical；Helical gear 41 and helical gear 33 engaged transmission, gear ratio is 1:2, turns to contrary；Gear 32 is nibbled with gear ring 3 external tooth Close, gear ratio is 2:1, turn to contrary；It is 1 by the product of gear ratio twice, counterturn understands twice, gear ring 3 and bent axle group a Rotating speed size is identical, turns to identical；The gear 6 of bent axle group a and gear 8 are engaged with gear ring 3 internal tooth, the gear 6 of bent axle group a With gear 8 and gear ring 3 geo-stationary, do not rotate, now maneton assembly e axis is farthest from bent axle group a, and compression ratio is Greatly.

Ring tooth 46 is machined with adjustment axis h, adjustment axis h are moved by adjusting gear 51 and ring tooth 46 engaged transmission Dynamic；In terms of stepper assemblies i motor shaft 50 to motor 48 direction, adjust gear 51 when rotating clockwise, adjustment axis h to Move left, when regulation gear 51 rotates counterclockwise, adjustment axis h move right.

When ring tooth 46 is moved to the left, helical gear 41 synchronizing moving to the left, from helical gear engaged transmission principle, Due to helical gear 41 synchronizing moving to the left, helical gear 33 rotation phase is delayed, and then makes synchronization group b and and gear Gear ring 3 rotation phase of 32 engagements is delayed；Now in terms of Fig. 2 direction, gear ring 3 opposed gear 6 rotates counterclockwise, and then Maneton assembly e is driven to rotate counterclockwise relative to bent axle group a；When the angular range that rotates counterclockwise of maneton assembly e exists When 0-180 spends, combustion chamber volume becomes larger, and compression ratio reduces with the increase of rotational angle；Inverse time as maneton assembly e When 180-360 spends, combustion chamber volume tapers into pin rotational angle range, and compression ratio increases with the increase of rotational angle.

When ring tooth 46 moves right, helical gear 41 synchronizing moving to the right, helical gear 33 rotation phase shifts to an earlier date, and enters And make synchronization group b and gear ring 3 rotation phase that engaged with gear 32 is shifted to an earlier date, now in terms of Fig. 2 direction, gear ring 3 is relatively Gear 6 rotates clockwise, and then drives maneton assembly e to rotate clockwise；Clockwise as maneton assembly e When 0-180 spends, combustion chamber volume becomes larger rotational angle range, and compression ratio reduces with the increase of rotational angle, works as song The relative of Journal housing e rotates clockwise angular range when 180-360 spends, the piston-swept constancy of volume, and compression ratio is with rotation The increase of angle and increase.

Claims (4)

1. a kind of gear ring adjustable type internal-combustion engine variable compression ratio mechanism is it is characterised in that by bent axle group (a), synchronization group B (), phase adjusted group (c), belt (1), positioning table (2) and gear ring (3) composition, wherein positioning table (2) is fixed on gear ring (3) On the left of portion；The belt gear (10) of bent axle group (a) is connected with the belt gear (40) of phase adjusted group (c) through belt (1)； The gear (6) of bent axle group (a) and gear (8) are engaged with gear ring (3) inner teeth；The gear (32) of synchronization group (b) with Gear ring (3) external teeth engages；The helical gear (33) of synchronization group (b) is nibbled with the helical gear (41) of phase adjusted group (c) Close.

2. the gear ring adjustable type internal-combustion engine variable compression ratio mechanism as described in claim 1 is it is characterised in that described bent axle group A () is by trunnion assembly (d), maneton assembly (e), crank assemblies (f), snap ring (4), bearing (5), gear (6), bearing (7), gear (8), axle journal (9) and belt gear (10) composition, described trunnion assembly (d) by trunnion (12), Boss (13) and crank (14) is affixed from left to right forms, be wherein provided with from left to right on trunnion (12) annular groove (21) and Keyway (11)；The concave station (16) on crank (14) top is provided with hole (15), and the concave station (18) of crank (14) bottom sets There is counterbore (17), the concave station (20) of crank (14) bottom is provided with counterbore (19)；Described maneton assembly (e) is by a left side Axle (27), axis (29) and right axle (30) is affixed from left to right forms, wherein left axle (27) is provided with keyway (28)；Institute By crank (23) and trunnion (24) is affixed forms for the crank assemblies (f) stated, and wherein crank (23) top is provided with hole (22)；Snap ring (4), belt gear (10) and bearing (5) are sequentially arranged in the trunnion of trunnion assembly (d) from left to right (12) on, the inner ring of its middle (center) bearing (5) and trunnion (12) interference fit, the key of belt gear (10) and trunnion (12) Groove (11) is bonded, and snap ring (4) is fixed in the annular groove (21) of trunnion (12)；Gear (8) is through axle journal (9) and main shaft Counterbore (17) in neck assembly (d) and counterbore (19) are flexibly connected；Gear (6) and left axle (27) in maneton assembly (e) Keyway (28) bonded, in the left part of left axle (27) and trunnion assembly (d), hole (15) activity of crank (14) is even Connect, in maneton assembly (e), right axle (30) is flexibly connected with the hole (22) of crank in crank assemblies (f) (23)；Bearing (7) inner ring and trunnion (24) interference fit of crank assemblies (f).

3. the gear ring adjustable type internal-combustion engine variable compression ratio mechanism as described in claim 1 is it is characterised in that described rotating speed is same Step group (b) is made up of synchronizing shaft (g), bearing (31), gear (32), helical gear (33), bearing (34), and described is same Step axle (g) is by left axle (35), axis (37), right axle (39) is affixed forms, and axis (37) is sequentially with from left to right Keyway (36) and keyway (38)；Bearing (31) be located at synchronizing shaft (g) left axle (35), the inner ring of bearing (31) with Left axle (35) interference fit；Gear (32) is bonded with the keyway (36) of the upper axis (37) of synchronizing shaft (g), helical gear (33) bonded with the keyway (38) of the upper axis (37) of synchronizing shaft (g)；Bearing (34) is located at the right axle of synchronizing shaft (g) (39), the inner ring of bearing (34) and right axle (39) interference fit.

4. the gear ring adjustable type internal-combustion engine variable compression ratio mechanism as described in claim 1 is it is characterised in that described phase place is adjusted Section group (c) is by adjustment axis (h), stepper assemblies (i), belt gear (40), helical gear (41), bearing (42), axle Hold (43) and bearing (44) composition, described adjustment axis (h) are provided with keyway (45), ring tooth (46) and key from left to right Groove (47)；Described stepper assemblies (i) by motor (48), key (49), motor shaft (50) and adjust gear (51) Composition；Adjust gear (51) affixed with the outer end of motor shaft (50) through key (49)；Bearing (44), belt gear (40) and axle Hold (43) and be sequentially arranged in adjustment axis (h) left end from left to right, its middle (center) bearing (44) and bearing (43) inner ring and regulation Axle (h) is flexibly connected, and belt gear (40) is bonded with keyway (45)；Gear (51) is adjusted in stepper assemblies (i) Engage with the ring tooth (46) of adjustment axis (h), helical gear (41) is bonded with the upper keyway (47) of adjustment axis (h)；Bearing (42) it is located at the right-hand member of adjustment axis (h), and bearing (42) inner ring is flexibly connected with adjustment axis (h).