CN201149065Y

CN201149065Y - Second order reciprocating inertial force balancing device of internal combustion engine

Info

Publication number: CN201149065Y
Application number: CNU200820004513XU
Authority: CN
Inventors: 苗小龙
Original assignee: ORDOS HUATAI AUTOMOBILE ENGINE CO Ltd
Current assignee: Inner Mongol Ou Yide Engine Ltd.
Priority date: 2008-01-23
Filing date: 2008-01-23
Publication date: 2008-11-12
Anticipated expiration: 2018-01-23

Abstract

A second-order reciprocating inertial force balance device of an internal combustion engine comprises a crankshaft, balance shafts and balance blocks, and is characterized in that: a driving gear (11) is sleeved on an outer ring of a front crank of a fourth crank throw of the crankshaft (1), the number of the balance shafts is two, a gear (12) which is meshed with the driving gear (11) is arranged on the balance shaft (21) to be corresponding to the driving gear, the gear (121) is further arranged on the balance shaft (21), the gear (13) which is meshed with the gear (121) is arranged on the balance shaft (31), two pairs of balance blocks of (211a, 211b) and (311a, 311b) are respectively arranged on the balance shafts (21), (31); the structure provided by the utility model is used for solving the technical problem in the prior art that local vibration and cracks occur because the crankshaft support part of the internal combustion engine is easy to bear the inertial force which changes up and down along the shaft line of a pneumatic cylinder due to the second-order inertial force generated during the up and down motion process of a piston system, thus being conducive to the further improvement of the overall rigidness and strength of the engine body of the internal combustion engine.

Description

A kind of two-stage reciprocating inertia force Equilibrator of internal-combustion engine

Technical field:

The utility model relates to a kind of Equilibrator of reciprocal inertia force of reciprocal inertia force Equilibrator, particularly a kind of automobile engine of internal-combustion engine.

Background technique:

At present, commonly used four-stroke four cylinder engine in upright arrangement on automobile, on its crankshaft structure, the method by suitable layout equilibrium block is to guarantee its dynamic balancing, thereby eliminate the rotating inertia force that motor is produced in operation process, but still can't eliminate uneven two-stage reciprocating inertia force.In general, eliminate two-stage reciprocating inertia force by adopting methods such as two balance sysmtes, to obtain balance.Eliminated two-stage reciprocating inertia force, it is higher or smoothness of operation required the runnability requirement with motor of extra high automobile with small output volume finally to satisfy rotating speed.

For this purpose, though at present used its kind of two balance sysmtes and structure are various, its structure is complexity, such as, comprising balance shaft housing, trunnion shaft, counterweight, actuation gear or chain drive-belt etc., its overall structure is not compact, and each arrangements of components difficulty of getting up is big.

The model utility content:

The purpose of this utility model is to overcome above-mentioned the deficiencies in the prior art, provide a kind of compact structure, easy for installation, rationally utilize internal-combustion engine existing space position the Equilibrator of two-stage reciprocating inertia force.

The two-stage reciprocating inertia force Equilibrator of a kind of internal-combustion engine that provides according to the utility model, include bent axle, trunnion shaft, equilibrium block, before turning, the 4th of described bent axle on the crank outer ring actuation gear is installed, described trunnion shaft is two, on first trunnion shaft, be provided with the driven gear that is meshed with it corresponding to actuation gear, on first trunnion shaft, also be provided with first gear, secondary balance shaft is provided with second gear that is meshed with first gear, is respectively arranged with two pairs of equilibrium blocks on described first trunnion shaft, secondary balance shaft;

The utility model also has following additional technical feature:

The gear ratio of actuation gear and driven gear is 2: 1, switched in opposite, and first gear equates switched in opposite with the number of teeth of second gear.

Described first trunnion shaft and secondary balance shaft are installed in the middle part of the bottom surface that the lower support element of described bent axle constitutes;

Described equilibrium block shape is identical, identical in quality, its rotating center of the deviation of gravity center of described equilibrium block;

Described equilibrium block is equipped with a through hole at centre bit, and equilibrium block is installed on the trunnion shaft by assembling set;

Described trunnion shaft is surrounded by half in outward in the trunnion shaft cover, and described trunnion shaft is covered with six fastener holes;

Corresponding to described fastener hole, be provided with corresponding mounting hole on the lower support element of described bent axle.

The two-stage reciprocating inertia force Equilibrator of the internal-combustion engine that provides by the utility model because two Equilibrators are arranged in the existing space between crank case of internal combustion engine and the oil sump, need not on the miscellaneous part of internal-combustion engine arrangement space separately again; Because therefore direct gear engagement need not to be provided with separately chain drive-belt between bent axle and trunnion shaft, simplifies the structure; Equilibrium block has been divided into two, shortened the turning radius of equilibrium block, therefore, the structure that the utility model provides, not only realized the purpose of balance two-stage reciprocating inertia force, also reached under the situation of increasing combustion engine whole height not, realize the purpose of balance device structure compactness.

Description of drawings:

The two-stage reciprocating inertia force Equilibrator schematic representation of the internal-combustion engine that provides by the utility model is provided Fig. 1;

Fig. 2 is the bent axle of the internal-combustion engine among Fig. 1 and the gear engagement schematic representation between the trunnion shaft;

Fig. 3 is the structural representation of balance shaft apparatus;

Fig. 4 is the balance shaft apparatus sectional drawing of A-A among Fig. 3;

Embodiment:

An embodiment of the present utility model describes with reference to Fig. 1-4:

Referring to Fig. 1-Fig. 4, present embodiment is to be example with four-stroke four cylinder diesel engines in upright arrangement,

The two-stage reciprocating inertia force Equilibrator of internal-combustion engine includes bent axle 1, first trunnion shaft 21 and secondary balance shaft 31, before turning, the 4th of bent axle 1 on the crank outer ring actuation gear 11 is installed, on first trunnion shaft 21, driven gear 12 is installed, driven gear 12 is meshed with actuation gear 11, actuation gear 11 is 2: 1 with the gear ratio of driven gear 12, switched in opposite, secondary balance shaft 31 is provided with second gear 13 that is meshed with first gear 121, first gear 121 equates with the number of teeth of second gear 13, switched in opposite, first trunnion shaft 21 is provided with a pair of equilibrium block 211a, 211b, secondary balance shaft 31 is provided with 311a, 311b, equilibrium block 211a, 211b, 311a, the 311b shape is identical, identical in quality, its rotating center of the deviation of gravity center of each equilibrium block, equilibrium block 211a, 211b, 311a, 311b is equipped with a through hole at centre bit, equilibrium block 211a, 211b, 311a, 311b passes through hole by assembling set and is installed on the trunnion shaft, first trunnion shaft 21, secondary balance shaft 31 is surrounded by half in the trunnion shaft cover 5, on trunnion shaft cover 5, is provided with

fastener hole

61,62,63,64,65,66, the lower support element 7 of bent axle 1 is three, be respectively equipped with mounting hole 71 on it, 72,73,74,75,76,

mounting hole

71,72,73,74,75,76 and

fastener hole

61,62,63,64,65,66 is corresponding one by one, and assembling set can be installed on trunnion shaft cover 5 on bent axle 1 supporting element 7 by above-mentioned mounting hole and fastener hole.

The foregoing description is only for the usefulness that the utility model is described; and be not to restriction of the present utility model; the those of ordinary skill in relevant technologies field; under the situation that does not break away from spirit and scope of the present utility model; can also make various variations and modification; therefore all technological schemes that are equal to also belong to category of the present utility model, and scope of patent protection of the present utility model should be limited by each claim.

Claims

1. the two-stage reciprocating inertia force Equilibrator of an internal-combustion engine, include bent axle, trunnion shaft, equilibrium block, it is characterized in that: actuation gear (11) is installed on the crank outer ring before the 4th of described bent axle (1) turns, described trunnion shaft is two, on first trunnion shaft (21), be provided with the driven gear (12) that is meshed with it corresponding to actuation gear (11), on first trunnion shaft (21), also be provided with first gear (121), secondary balance shaft (31) is provided with second gear (13) that is meshed with first gear (121), at described first trunnion shaft (21), be respectively arranged with two couples of equilibrium block (211a on the secondary balance shaft (31), 211b), (311a, 311b).

2. the two-stage reciprocating inertia force Equilibrator of internal-combustion engine as claimed in claim 1, it is characterized in that: actuation gear (11) is 2: 1 with the gear ratio of driven gear (12), switched in opposite, first gear (121) equates switched in opposite with the number of teeth of second gear (13).

3. the two-stage reciprocating inertia force Equilibrator of internal-combustion engine as claimed in claim 1 is characterized in that: described first trunnion shaft (21) and secondary balance shaft (31) are installed in the middle part of the bottom surface that the lower support element (7) of described bent axle (1) constitutes.

4. as the two-stage reciprocating inertia force Equilibrator of claim 2 or 3 described internal-combustion engines, it is characterized in that: (311b) shape is identical, and is identical in quality for 211a, 211b, 311a, its rotating center of the deviation of gravity center of described equilibrium block for described equilibrium block.

5. the two-stage reciprocating inertia force Equilibrator of internal-combustion engine as claimed in claim 4 is characterized in that: described equilibrium block (211a, 211b, 311a, 311b) be equipped with a through hole at centre bit, (211a, 211b, 311a 311b) are installed on the trunnion shaft by assembling set equilibrium block.

6. the two-stage reciprocating inertia force Equilibrator of internal-combustion engine as claimed in claim 5, it is characterized in that: described trunnion shaft is surrounded by half in the trunnion shaft cover (5), and described trunnion shaft is covered with six fastener holes (61,62,63,64,65,66).

7. the two-stage reciprocating inertia force Equilibrator of internal-combustion engine as claimed in claim 6, it is characterized in that: the lower support element of described bent axle (7) is gone up corresponding to described fastener hole (61,62,63,64,65,66), is provided with corresponding mounting hole (71,72,73,74,75,76).