CN209180219U - A kind of engine crankshaft, engine and vehicle - Google Patents

Abstract

The utility model relates to engine arts, disclose a kind of engine crankshaft, engine and vehicle, the engine crankshaft includes multiple cranks, at least two cranks are equipped with balance weight, when piston is in bottom dead center position, it is equipped with plane to the smallest balance weight of plunger distance, and the distance for being equipped with plane to piston on the balance weight of plane is minimum.It can be under the premise of reduction crankshaft counterbalance rate as small as possible, guarantee that there is between crankshaft and piston safe distance when piston is located at lower dead center, when piston is located at lower dead center, the distance between crankshaft and piston be in safe range, as crankshaft continues to rotate, piston stroking upward, the distance between piston and crankshaft will be gradually increased, then guarantee that other any moment crankshafts will not be with piston contact, without opening molding jig again, only above-mentioned plane need to be formed by milling on corresponding balance weight, processing method is simple and fast.

Description

A kind of engine crankshaft, engine and vehicle

Technical field

The utility model relates to engine art more particularly to a kind of engine crankshafts, engine and vehicle.

Background technique

Crankshaft is engine core rotary part, and the pressure that engine combustion generates is passed to by the reciprocating motion of piston The reciprocating motion that connecting rod transmits is converted to rotary motion again by connecting rod, crankshaft.Crankshaft is equipped with balance weight, and balance weight is for balancing Crank-shaft link neck and the centrifugal force of connecting rod generation, torque, keep crankshaft operation steady, to reduce main bearing shell load.

Existing balance weight is often non-processing face or rotation machined surface, when piston motion to lower rest point, balance weight and work The distance between plug minimum, in order to guarantee the distance between balance weight and piston within the scope of safe distance, it will usually reduce bent The diameter of spindle balance weight, but the balanced ratio that the diameter for reducing balance weight will lead to crankshaft reduces.

Utility model content

The purpose of this utility model is to provide a kind of engine crankshaft, engine and vehicles, can guarantee that crankshaft is flat While weighing apparatus rate, make the distance between balance weight and piston within the scope of safe distance.

For this purpose, the utility model uses following technical scheme:

A kind of engine crankshaft, including multiple cranks, at least two cranks are equipped with balance weight, in the case where piston is in When dead-centre position, it is equipped with plane to the smallest balance weight of plunger distance, and be equipped with the plane on the balance weight of the plane Distance to the piston is minimum.

As a kind of optimal technical scheme of engine crankshaft, at least two balance weights are equipped with the plane, often A plane being equidistant to the piston.

As a kind of optimal technical scheme of engine crankshaft, after the engine crankshaft further includes crankshaft front end and crankshaft End, the two neighboring crank passes sequentially through connecting rod neck or main shaft diameter connection, along the crankshaft front end to the crankshaft rear end Direction, the connecting rod neck and main shaft diameter are successively alternately distributed.

As a kind of optimal technical scheme of engine crankshaft, the central axes that the plane is parallel to the crankshaft front end are set It sets.

As a kind of optimal technical scheme of engine crankshaft, two cranks close to the crankshaft rear end pass through one The connecting rod neck connection.

The utility model additionally provides a kind of engine, including above-mentioned engine crankshaft.

As a kind of optimal technical scheme of engine crankshaft, including piston, the piston is located at the engine crankshaft Radial side.

As a kind of optimal technical scheme of engine crankshaft, the piston is connect with connecting rod neck by connecting rod.

As a kind of optimal technical scheme of engine crankshaft, the connecting rod neck is connect with the major part of the connecting rod, described Piston is connect with the microcephaly of the connecting rod.

The utility model additionally provides a kind of vehicle, including above-mentioned engine.

The utility model has the beneficial effects that being equipped with when piston is located at lower dead center to the smallest balance weight of plunger distance Plane, and the distance for being equipped with plane to piston on the balance weight of plane is minimum, it can be in reduction as small as possible by the setting Under the premise of crankshaft counterbalance rate, the minimum range between crankshaft and piston is limited, guarantees crankshaft and work when piston is located at lower dead center There is safe distance, crankshaft is minimum at a distance from piston when piston is located at lower dead center, living as crankshaft continues to rotate between plug It goes beyond the Great Wall, the distance between piston and crankshaft will be gradually increased, and then guarantee that other any moment crankshafts will not connect with piston Touching only need to form above-mentioned plane by milling on corresponding balance weight, processing method is simple without opening molding jig again Fast.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of engine crankshaft described in the utility model；

Fig. 2 is that piston described in the utility model is in the position of the engine crankshaft and piston pass when bottom dead center position System's figure；

Fig. 3 be piston described in the utility model not in bottom dead center position the position of the engine crankshaft and piston close System's figure.

In figure:

1, crankshaft front end；2, crank；4, connecting rod neck；5, main shaft diameter；6, clump weight；61, plane；7, piston；8, after crankshaft End.

Specific embodiment

The technical issues of to solve the utility model, the technical solution of use and the technical effect that reaches are clearer, Further illustrate the technical solution of the utility model below with reference to the accompanying drawings and specific embodiments.It is understood that Specific embodiment described herein is used only for explaining the utility model, rather than the restriction to the utility model.In addition it also needs It is noted that illustrating only part relevant to the utility model for ease of description, in attached drawing and not all.

Fig. 1 is a kind of engine crankshaft provided in this embodiment, which includes the song set gradually along axial direction Axis front end 1, multiple cranks 2 and crankshaft rear end 8, the two neighboring crank 2 is connected by connecting rod neck 4 or main shaft diameter 5, along crankshaft Front end 1 to the direction of crankshaft rear end 8, connecting rod neck 4, main shaft diameter 5 are successively alternately distributed, i.e., close to two cranks 2 of crankshaft front end 1 It is connected by connecting rod neck 4, further, two cranks 2 close to crankshaft rear end 8 are connected also by connecting rod neck 4, and at least two is bent Handle 2 is equipped with balance weight 6.Wherein for the crankshaft front end of engine commonly used in connection belt pulley, the crankshaft rear end 8 of engine is usual For being connected to flywheel.

Referring to figs. 1 to shown in Fig. 3, when piston 7 is in bottom dead center position, set on the smallest balance weight 6 to piston 7 There is plane 61, and the distance for being equipped with plane 61 to piston 7 on the balance weight 6 of plane 61 is minimum, can to the greatest extent may be used by the setting Under the premise of reduction crankshaft counterbalance rate that can be small, the minimum range between crankshaft and piston 7 is limited, guarantees that piston 7 is located at lower stop There is between crankshaft and piston 7 safe distance when point, when piston 7 is located at lower dead center, crankshaft is minimum at a distance from piston 7, with Crankshaft continues to rotate, and 7 uplink of piston, the distance between piston 7 and crankshaft will be gradually increased, and then guarantees that other any moment are bent Axis will not be contacted with piston 7, without opening molding jig again, need to only be formed on corresponding balance weight 6 by milling above-mentioned flat Face 61, processing method is simple and fast.Preferably, each plane 61 is arranged each parallel to the central axes of crankshaft front end 1.

When at least two balance weights 6 are equipped with plane 61, each being equidistant to piston 7 of plane 61 can guarantee to set Having the balance weight 6 of plane 61 will not contact with piston 7, make distance between the two in the range of safety.

In lower dead center, each plane 61 is to the distance of piston 7 according to the eccentric distance of connecting rod neck 4, rate of climb of connecting rod etc. It determines, the engine of different model, it is possible different in the distance that piston 7 is located at each plane 61 in lower dead center to piston 7.

To achieve the goals above, the present embodiment additionally provides a kind of engine, including above-mentioned engine crankshaft.The hair Motivation includes piston 7, and piston 7 is located at the radial side of engine crankshaft, and piston 7 is connect with connecting rod neck 4 by connecting rod, specifically Ground, connecting rod neck 4 are connect with the major part of connecting rod, and piston 7 is connect with the microcephaly of connecting rod.

It is located at lower dead center in piston, spacing is equipped between plane 61 and piston 7.Using starting for above-mentioned engine crankshaft Machine can guarantee realization on the basis of guaranteeing crankshaft counterbalance rate, guarantee the distance between piston 7 and crankshaft in safe distance model In enclosing, keep the structure of engine more compact.

The present embodiment additionally provides a kind of vehicle, including above-mentioned engine.

Obviously, the above embodiments of the present invention is used for the purpose of clearly illustrating examples for clearly illustrating the present invention, and It is not limitations of the embodiments of the present invention.For those of ordinary skill in the art, in above description On the basis of can also make other variations or changes in different ways.There is no need and unable to give all embodiments Exhaustion.Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention etc., should be included in Within the protection scope of the utility model claims.

Claims (10)

1. a kind of engine crankshaft, including multiple cranks (2), at least two cranks (2) are equipped with balance weight (6), special Sign is, when piston (7) is in bottom dead center position, is equipped with plane (61) apart from the smallest balance weight (6) to piston (7), And the distance for being equipped with the plane (61) to the piston (7) on the balance weight (6) of the plane (61) is minimum.

2. engine crankshaft according to claim 1, which is characterized in that at least two balance weights (6) are equipped with institute It states plane (61), each plane (61) being equidistant to the piston (7).

3. engine crankshaft according to any one of claims 1 to 2, which is characterized in that the engine crankshaft further includes song Axis front end (1) and crankshaft rear end (8), the two neighboring crank (2) is connected by connecting rod neck (4) or main shaft diameter (5), along described To the direction of the crankshaft rear end (8), the connecting rod neck (4) and main shaft diameter (5) are successively alternately distributed crankshaft front end (1).

4. engine crankshaft according to claim 3, which is characterized in that the plane (61) is parallel to the crankshaft front end (1) central axes setting.

5. engine crankshaft according to claim 3, which is characterized in that described in two of the crankshaft rear end (8) Crank (2) passes through connecting rod neck (4) connection.

6. a kind of engine, which is characterized in that including any engine crankshaft of claim 1 to 5.

7. engine according to claim 6, which is characterized in that including piston (7), the piston (7) is located at the hair The radial side of motivation crankshaft.

8. engine according to claim 6, which is characterized in that the piston (7) and connecting rod neck (4) are connected by connecting rod It connects.

9. engine according to claim 8, which is characterized in that the connecting rod neck (4) connect with the major part of the connecting rod, The piston (7) connect with the microcephaly of the connecting rod.

10. a kind of vehicle, which is characterized in that including the described in any item engines of claim 6 to 9.