CN2466363Y - Crankshaft type multi-cylinder non-connecting-rod piston engine - Google Patents

Abstract

The utility model relates to a crank shaft type multi-cylinder piston machine provided with no connecting rod. The interior of a casing 7 is provided with an eccentric normal line disc 6 provided with a curved slot 5, and the normal line disc is fixedly connected with a drive shaft 8. Each piston 2 is provided with a guide column pin 4, and the bottom end of each piston is contacted with the peripheral surface of an eccentric wheel 1. The model fully combines the advantages of a reciprocating and a rotary piston machines and has the characteristics of simple structure, small size, light weight, low noise, steady running, good sealing performance, good heat radiation, etc.; the utility model can satisfy the requirements of large power, large torque and large discharge.

Description

Crank shaft type multi-cylinder body Rodless piston machine

The utility model relates to a kind of piston machine, and particularly crank shaft type multi-cylinder body does not have the piston machine of connecting rod.

The structure type of piston machine is mainly reciprocating type and rotary two kinds.Wherein, have the structure member of connecting rod reciprocating piston machine more, volume is also big, weight is big, noise is high, and makes the on-stream generation dither of this type because of eccentric combination with connecting rod, square in direct ratio the increasing of its vibration frequency and rotating speed is easy to make parts to damage.Also, not only can not adapt to high speed operation under extraordinary operating mode demand, and also can only reach 85～90% the utilization of heat energy owing to the existence of angle of connecting rod.And the compound piston machine of connection rod-free reciprocating (as plunger type, slip pipe formula) is that axle piston when rotating is still keeping the form of straight reciprocating motion, and this type can only be used for auxiliary power machinery, as hydraulic press, aerostatic press and so on.Existing more advanced is the rotary piston machine, mainly is a kind of type that utilizes the wankel principle to form, and it does not need connecting rod, piston is directly installed on the crankshaft, its compact structure, component are few, vibrating noise is all little, can adapt to high speed operation, also need not establish air inlet and exhaust valve.But can not use as high pulling torque, powerful load-carrying locomotive, inner surface of cylinder block produced irregular wear when the dither that its piston produced made radial seal, formed the rapid generation of casing wall shake line, was having a strong impact on the working life of this machine.

The purpose of this utility model is exactly to overcome the deficiency that exists in the background technique, and provide a kind of simple in structure, running is steadily reliable, the crank shaft type multi-cylinder body Rodless piston machine that can adapt to high speed operation.

To achieve these goals, the utility model proposes the corresponding techniques solution:

This crank shaft type multi-cylinder body Rodless piston machine has a housing, it mainly is to have a method drum with eccentric curvilinear groove in housing, this method drum is fixedlyed connected with main shaft, and each piston is provided with a guide pillar pin, and the bottom of piston contacts with eccentric circumferential surface.Eccentric wheel and main shaft are connected as a single entity.The guide pillar pin passes piston and embeds in the curvilinear groove.The method drum is installed with main shaft is concentric.

Fig. 1: axial arrangement sectional view of the present utility model.

Fig. 2: radial structure sectional view of the present utility model.

Fig. 3: the utility model operating condition schematic representation.

Fig. 4: normal dish structural representation.

Below in conjunction with drawings and Examples the utility model is done an explanation.

As shown in Figure 1, the utlity model has a housing 7, run through a main shaft 8 that has eccentric wheel 1 at the center of housing 7, this eccentric wheel 1 and main shaft 8 be eccentric to be provided with and to be connected as a single entity and to constitute a crankshaft.Also have a normal dish 6 in the housing 7, install with the medial axis of main shaft 8 is concentric the medial axis of this normal dish 6, and off-centre is provided with a curvilinear groove 5 on the normal dish 6, and the difference of the medial axis of this curvilinear groove 5 and eccentric wheel 1 medial axis is a unit throw of eccentric.Piston 2 is positioned at the cylinder body 3 that is connected with housing 7, guide pillar pin 4 of cross-under on the bottom of piston 2, one section curvilinear groove 5 interior operation relatively of stretching into normal dish 6 all the time of this guide pillar pin 4.The bottom end of piston 2 contacts with the outer peripheral surface of eccentric wheel 1 all the time.Below housing 7, also be provided with a long-pending oil pocket 10 and a support 11.The running orbit of said curvilinear groove 5 inwalls is the subcordate non-circular curve of a class (referring to Fig. 4).

As Fig. 2, shown in Figure 3, the utility model both can be provided with a cylinder body 3, also can be at grade by radially being the radial a plurality of cylinder bodies 3 (having described the structure situation of three cylinder bodies 3.1,3.2,3.3 in this example) that are provided with.Piston 2 bottoms in each cylinder body 3 all have a guide pillar pin 4, and the bottom end of each piston 2 all contacts with the outer peripheral surface of eccentric wheel 1.

Guide pillar pin 4 is a strip, and its cross section is the semicircle arcuation, is slidingly matched with convenient inwall with curvilinear groove 5.One end of guide pillar pin 4 stretches in the curvilinear groove 5.In order to reduce resistance, guide pillar pin 4 also can be replaced by the pillar bearing.

Its working principle: when being rotated by power equipment drive main spindle 8, eccentric wheel 1 also together rotates, normal dish 6 under the effect of main shaft 8 and eccentric wheel 1 also simultaneously in active chamber 9 center of circle with main shaft 8 rotate.Because curvilinear groove 5 is set for the eccentric on normal dish 6, so when rotating with normal dish 6, curvilinear groove 5 its inwall when rotated forces guide pillar pin 4 to drive pistons 2 to do straight reciprocating motion in cylinder body 3.1,3.2,3.3.Also because the position-limiting action of guide pillar pin 4 and the effect of cylinder body 3 inner carriers 2 top pressures, make piston 2 bottom ends all the time with eccentric wheel 1 outer peripheral surface contact friction, but also driven plunger 2 is done straight reciprocating motion in cylinder body 3.1,3.2,3.3 separately.

When the piston in the cylinder body 3.1 2 is in top dead center, is in half row pressure state in the cylinder body 3.2, and is in half suction condition (referring to Fig. 2) in the cylinder body 3.3.And, be in half suction condition in the cylinder body 3.1 when main shaft 8 again during half-twist, be in the closely intact state of row pressure in the cylinder body 3.2, and be in beginning pressure condition (referring to Fig. 3) in the cylinder body 3.3.By that analogy, when main shaft 8 continuous high speeds turned round, the piston 2 in several cylinder bodies 3.1,3.2,3.3 was also just ceaselessly done straight reciprocating motion and work done in cylinder body separately.Certainly, the piston machine of this structure is not limited to the rotation of the clockwise direction shown in the arrow among the figure, counterclockwise all right or the two alternately rotation, and it is used with the reciprocal mechanical function conversion equipment that exchanges to help stepless change.

Combine the advantage of reciprocating piston machine and rotary-piston machine in the structural design of the present utility model, both kept The straight reciprocating motion work done mode of piston, simple in structure, the body that makes again rotary-piston machine in a small amount light, do not have and connect The characteristics such as bar, good airproof performance, smooth running, vibrating noise are little have obtained embodying fully, adapt at a high speed fortune fully The needs of row. Owing to adopted no bar linkage structure, eliminated in the reciprocating piston machine because of angle of connecting rod producing Power attenuation improves the utilization rate of mechanical energy greatly. Because several cylinder bodies of this type are in the same plane, make Getting whole body volume all has significantly minimizing radial and axial, and has improved the bending resistance of crank axle. This multi-cylinder body structure also more is conducive to heat radiation, thereby patience and the service life of having improved equipment can satisfy big merit The demand of rate, high pulling torque, big discharge capacity, except as the engine, also can do air compressor machine, hydraulic press, vacuum machine, The various mechanism such as bulking machine are used.

Claims (4)

1, a kind of crank shaft type multi-cylinder body Rodless piston machine, it has a housing (7), it is characterized in that in housing (7), having a method drum (6) with eccentric curvilinear groove (5), this method drum (6) is fixedlyed connected with main shaft (8), each piston (2) is provided with a guide pillar pin (4), and the bottom of each piston (2) all contacts with the circumferential surface of eccentric wheel (1).

2, piston machine as claimed in claim 1 is characterized in that eccentric wheel (1) and main shaft (8) are connected as a single entity and constitute a crankshaft.

3, piston machine as claimed in claim 1 is characterized in that guide pillar pin (4) passes piston (2) and embeds in the curvilinear groove (5).

4, piston machine as claimed in claim 1 is characterized in that method drum (6) and the concentric installation of main shaft (8).

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