CN201416635Y - Piston of crank circle sliding block mechanism and internal combustion engine thereof - Google Patents

Abstract

A piston of a crank circle sliding block mechanism at least comprises a crown, a skirt section and a piston seat; the skirt section comprises a mounting seat and an extending part extending along theside surface of the mounting seat; a smooth block accommodating hole is formed on the piston seat; the crown is fixed and assembled on the end surface of the extending part opposite to the extending direction on the mounting seat; one end of the piston seat is fixed and assembled on the end surface opposite to the crown mounting end surface; oil supply channels are arranged on the crown and on thepiston seat; a connecting channel for communicating the oil supply channels on the crown and the piston seat is arranged on the mounting seat of the skirt section; and a reflow hole communicated withthe oil supply channel on the crown is formed on the mounting seat of the skirt section. The piston of the crank circle sliding block mechanism can work under the lubricating oil pressure and realizethe cooling of the piston crown; in addition, the utility model also provides an internal combustion engine.

Description

The piston of circular slider-crank mechanism and internal-combustion engine thereof

Technical field

The utility model relates to piston, is specifically related to a kind of piston of circular slider-crank mechanism.The utility model also relates to a kind of internal-combustion engine of circular slider-crank mechanism simultaneously.

Background technique

In traditional internal-combustion engine, by brace and connecting rod framework the to-and-fro motion of piston is converted to rotatablely moving of bent axle, and then by the corresponding moving element of this crank-driven, externally outputting power.Yet defectives such as in described connecting rod, because the existence of connecting rod, that the internal-combustion engine of connecting rod has is bulky, heavy, balance quality difference.

For addressing the above problem, the authorization day for announcing is that the Chinese patent that January 13, notification number in 1988 are CN85200358B discloses a kind of " crankshaft circular slide block reciprocating piston internal combustion engine "; Notice of authorization day is June 27 calendar year 2001, notice of authorization number to disclose a kind of " crank and double-round slide reciprocating piston internal combustion engine " for the Chinese patent of CN1067741C; Notice of authorization day is June 27 calendar year 2001, notice of authorization number to disclose a kind of " crank and multi-round slide reciprocating piston internal combustion engine " for the Chinese patent of CN1067742C.

The disclosed internal-combustion engine common feature of above-mentioned Chinese patent is in wherein to-and-fro motion and the switching mechanism that rotatablely moves, to have replaced connecting rod with smooth block, has replaced connecting rod with circular slider-crank mechanism.This make to-and-fro motion and rotatablely move between switching mechanism simplified, the internal-combustion engine that adopts this switching mechanism descends with respect to traditional internal-combustion engine volume, weight saving, and balance quality is good.

Concrete, in the movement conversion mechanism of circular slider-crank mechanism, the piston seat of piston is provided with circular slider accommodation hole, and smooth block is provided with eccentric circular hole.During assembling, smooth block is placed described circular slider accommodation hole, smooth block can rotate in described circular slider accommodation hole; The crank pin of bent axle is assemblied in the described eccentric circular hole, and crank pin also can rotate in described eccentric circular hole.Driving the smooth block that is arranged at wherein by piston moves reciprocatingly, and smooth block rotates in described piston simultaneously, and described to-and-fro motion rotates around the central axis of bent axle with the synthetic central axis of the eccentric circular hole on the smooth block that makes that rotatablely moves; And the dead in line of the crank pin of the central axis of described eccentric circular hole and bent axle, thereby can realize the conversion that rotatablely moves that reciprocates to bent axle of piston.

The piston of the above-mentioned disclosed circular slider-crank mechanism of Chinese patent and the piston of traditional connecting rod have bigger different, thereby, its cooling and lubrication system are also different with described traditional piston, need the new structure of development to adapt to the piston cooling and the lubricated requirement of this circular slider-crank mechanism.

The model utility content

The utility model provides a kind of piston of circular slider-crank mechanism, and piston of the present utility model has the fuel feeding path, can be implemented under the pressure lubrication oil work and to the cooling of piston head.

The utility model provides a kind of internal-combustion engine in addition, internal-combustion engine of the present utility model have a higher working stability.

The piston of a kind of circular slider-crank mechanism that the utility model provides comprises at least: top, skirt section and piston seat; Described skirt section comprises fitting seat and the extension part that extends along described fitting seat side; Described piston seat is provided with circular slider accommodation hole; Described roof anchorage is assemblied on the described fitting seat bearing of trend opposing end faces with described extension part; One end of described piston seat fixedly is assemblied on the described fitting seat and the end face opposing end faces that described top is installed;

On described top and piston seat, be provided with oil supply gallery; The fitting seat in described skirt section is provided with the connecting passage of the oil supply gallery that is communicated with described top and piston seat, and is provided with the return port that is communicated with the oil supply gallery at described top.

Preferably, on described fitting seat, also be provided with positioning through hole, at described top and the end face of the fixing assembling of piston seat and described fitting seat also be provided with the location blind hole with described positioning through hole relevant position;

Location blind hole on the described piston seat is communicated with the oil supply gallery of this piston seat; Location blind hole on the described top is communicated with the oil supply gallery at this top;

Described connecting passage is the hollow locating stud;

During assembling, described hollow locating stud passes described positioning through hole and inserts respectively in the location blind hole of joint of described top and piston seat; Be communicated with the oil supply gallery of piston seat by the oil supply gallery of described hollow locating stud described piston head.

Optionally, the oil supply gallery at described top comprises and is arranged at described top towards annular groove end face, that be centered close to these end face central authorities of described fitting seat and the straight trough that described annular groove is communicated with the location blind hole at described top.

Optionally, described return port is arranged on the fitting seat in described skirt section and described straight trough bearing of trend opposite direction and the position that communicates with described annular groove.

Optionally, the oil supply gallery that is communicated with the location blind hole of this piston seat on the described piston seat is communicated with circular slider accommodation hole.

Optionally, the fitting seat in described skirt section is provided with through hole, is provided with blind hole at described top towards the end face of described fitting seat and with the corresponding position of described through hole; During assembling, link passes described through hole and is inserted in the described blind hole, described roof anchorage is assemblied on the fitting seat in described skirt section.

Optionally, the end with the fixing assembling in described skirt section at described piston seat is provided with joint; Be provided with connecting through hole with described fitting seat through hole relevant position on described joint, described link also passes described connecting through hole, and described piston seat fixedly is assemblied on the described fitting seat.

Optionally, described blind hole is a tapped hole, and described through hole and connecting through hole are common circular hole, and described link is a bolt.

Optionally, the fitting seat in described skirt section is provided with through hole, also is provided with through hole in the corresponding position of the through hole in described top and described skirt section; The end with the fixing assembling in described skirt section at described piston seat is provided with joint; On described joint, be provided with connecting through hole with described fitting seat through hole relevant position, during assembling, described link passes the through hole on described connecting through hole, the fitting seat and the through hole at top simultaneously, and described piston seat and roof anchorage are assemblied on the described fitting seat; Wherein, described link is rivet or screw bolt and nut.

Optionally, the edge that is used to assemble the end face at described top at described fitting seat is provided with outer stopper, is provided with the inner stopper that matches with described outer stopper towards the edge of the end face of described fitting seat at described piston head.

Optionally, described piston head be provided with the firing chamber towards the end face opposing end faces of described fitting seat.

Optionally, described firing chamber comprise by near arbitrary zone of top to respect to the main groove that the edge extends, the degree of depth shoals gradually, width narrows down gradually, and described main groove extend to the top center position to the both sides bifurcated form, with respect to a groove of described main groove symmetry.

Optionally, the material of described piston head is carbon steel, alloyed steel, stainless steel or titanium alloy, and the material of described piston skirt is an aluminum alloy, and the material of described piston seat is an aluminum alloy.

Optionally, in the both sides of described piston seat, be provided with strengthening rib along the end face edge of described circular slider accommodation hole and through the zone of described piston seat waist.

Optionally, described strengthening rib is along the annular catch on the whole all edges of described circular slider accommodation hole or along the arc block plate on all edges of described circular slider accommodation hole part.

Optionally, the other end at described piston seat is equipped with skirt section identical with this end and piston head.

Optionally, being equipped with counterweight at the other end of described piston seat inserts.

The utility model also provides a kind of internal-combustion engine of circular slider-crank mechanism, comprises the described piston of above-mentioned arbitrary technological scheme.

Compared with prior art, the technical solution of the utility model is provided with oil supply gallery on top and piston seat; The fitting seat in skirt section is provided with the connecting passage of the oil supply gallery that is communicated with described top and piston seat, and be provided with the return port that is communicated with the oil supply gallery at described top, can realize that the model utility piston is in the lubricated work down of pressure oil with to the cooling of piston head, can reduce the heat load of piston to the cooling of piston head, improve the operating conditions of piston and piston ring, increase reliability, can satisfy the requirement of the piston of high speed, high-intensity internal-combustion engine;

In addition, in the piston of the present utility model, piston comprises top, skirt section and piston seat three parts at least, and above-mentioned three partial fixings are assembled together, and can select the material of piston each several part as required, satisfying different needs, thereby can improve versatility;

In addition, the each several part of piston of the present utility model can be made respectively, then each several part is fitted together, and with respect to head (or bizet) and the integrally formed piston of piston seat, simplified manufacturing process, and combination is also very convenient, adapts to produce in batches.

In optimal technical scheme of the present utility model, on described fitting seat, also be provided with positioning through hole, at described top and the end face of the fixing assembling of piston seat and described fitting seat also be provided with the location blind hole with described positioning through hole relevant position; The location blind hole of piston seat is communicated with the oil supply gallery of this piston seat; The location blind hole at described top is communicated with the oil supply gallery at this top; Locating stud by hollow is communicated with the oil supply gallery of described piston seat with the oil supply gallery at described top, and forms return path by return port; Can realize that not only piston is in the lubricated work down of pressure oil with to the cooling of piston head, reduce the heat load of piston, improve the operating conditions of piston and piston ring, increase reliability, can satisfy the requirement of the piston of high speed, high-intensity internal-combustion engine, and described hollow locating stud has positioning action when piston head, skirt section and piston seat assembling.

Description of drawings

The plan view of the piston of the circular slider-crank mechanism that Fig. 1 provides for embodiment of the present utility model.

Fig. 2 is the plan view at top of piston of embodiment's of the present utility model circular slider-crank mechanism;

Fig. 3 is the bottom view at top of piston of embodiment's of the present utility model circular slider-crank mechanism;

Fig. 4 is Fig. 2 and Fig. 3 generalized section along YY ' direction;

Fig. 5 is the plan view of embodiment's of the present utility model piston skirt;

Fig. 6 is the bottom view of embodiment's of the present utility model piston skirt

Fig. 7 is along the generalized section of XX ' direction among Fig. 5;

Fig. 8 is along the generalized section of YY ' direction among Fig. 5;

Fig. 9 is the schematic representation of embodiment's of the present utility model piston seat;

Figure 10 is the schematic representation of joint of one of them end of the utility model embodiment's piston seat;

Figure 11 is the schematic representation of the two-way ram of circular slider-crank mechanism of the present utility model.

Embodiment

Be described in detail below in conjunction with specific embodiment and accompanying drawing piston the circular slider-crank mechanism of single cylinder engine of the present utility model.

The plan view of the piston of the circular slider-crank mechanism that Fig. 1 provides for embodiment of the present utility model.Wherein, shown in Fig. 1 is single action piston, promptly only is equipped with piston skirt and top in one of them end of the piston seat of piston, is to be understood that, piston of the present utility model also can be a two-way ram, promptly in an other end of piston seat skirt section and top is installed simultaneously also.Present embodiment only is equipped with the piston that piston skirt and top illustrate circular slider-crank mechanism of the present utility model as an example with an end of piston seat, other skirt section and top also can be installed with the same or analogous mode of embodiment of the present utility model in the other end of piston seat, form two-way ram.

Please refer to Fig. 1, the piston of embodiment's of the present utility model circular slider-crank mechanism comprises piston seat 1, skirt section 2 and top 3.Wherein, described piston seat 1 is provided with circular slider accommodation hole (this figure is not shown).Described skirt section 2 comprises fitting seat 2-1 and the extension part 2-2 that extends along described fitting seat 2-1 side.Described top 3 fixedly is assemblied on the described fitting seat 2-1 and the bearing of trend opposing end faces of described extension part 2-2.One end of described piston seat 1 fixedly is assemblied in described fitting seat 2-1 and goes up and the end face opposing end faces that described top 3 is installed.In the present embodiment, described top 3 and piston seat 1 fixedly are assemblied on the fitting seat 2-1 in described skirt section 2 simultaneously by link 4.

Described fitting seat 2-1 is provided with positioning hole through hole (not indicating), be provided with location blind hole (not indicating) in the relevant position of described top 3 and guide piston seat 1, locating stud 5 passes described through hole, inserts in the blind hole of corresponding location, be used for when described top 3, fitting seat 2 and piston seat 1 are assembled together, positioning.Wherein, described locating stud 5 is a hollow pin, oil supply gallery in the described piston seat 1 and the oil supply gallery in the top 3 can be coupled together (concrete description please refer to following explanation respectively to each parts)

Respectively assembly top 3, skirt section 2 and piston seat 1 are described respectively below.

At first assembly piston head 2 is described in conjunction with Fig. 2, Fig. 3 and Fig. 4.

Fig. 2 is the plan view at top 3 of piston of embodiment's of the present utility model circular slider-crank mechanism, and Fig. 3 is the bottom view at top 3, and Fig. 4 is Fig. 2 and Fig. 3 generalized section along YY ' direction.

Please refer to Fig. 2, Fig. 3 and Fig. 4, the side of the piston head 3 of present embodiment can be provided with compression ring annular groove 3-1.Be provided with blind hole 3-2 at described piston head 3 towards the end face of fitting seat 2-1 shown in Figure 1, when being used for that described top 3 is assemblied in described fitting seat, fixing described top 3.

Described blind hole 3-2 is a tapped hole.The 3-2 of blind hole described in the present embodiment is 2, is symmetrically distributed in the both sides of described top 3 end face axis, and it distributes shown in the bottom view of Fig. 3.

In addition, the quantity that those skilled in the art can be provided with blind hole 3-2 according to the needs of assembling is 3 or a plurality of, repeats no more here.

Also be provided with location blind hole 3-4 at described piston head 3 towards the central authorities of fitting seat 2-1 end face shown in Figure 1, described location blind hole 3-4 can be common circular hole, it is corresponding with the positioning through hole (please refer to following description to fitting seat) on the fitting seat 2-1, when being used for that piston head 3 is assemblied in fitting seat, cooperate locating stud to play location and leading role.Certainly, described location blind hole 3-4 also can be distributed in other position of described end face, also can no longer describe here with a plurality of location blind hole location.

Described location blind hole 3-4 is connected with oil supply gallery on this top 3.In the present embodiment, described oil supply gallery comprises and is arranged at described top 3 towards annular groove 3-3 end face, that be centered close to these end face central authorities of described fitting seat and the straight trough 3-8 that described annular groove 3-3 is communicated with the location blind hole at described top 3, as shown in Figure 3 and Figure 4.In addition, the oil supply gallery of other form can be set also, describe no longer one by one here.

Wherein, also has the loss of weight effect at described annular groove 3-3 and straight trough.Also can be at the top other position of 3 the loss of weight groove of other shapes is set, be not described in detail here.

Towards the edge of the end face of fitting seat 2-1 shown in Figure 1 outer stopper 3-5 (as shown in Figure 3 and Figure 4) can also be set at described piston head 3, this outer stopper 3-5 matches with inner stopper (can with reference to the description of following structure to the piston skirt) on being arranged at fitting seat 2-1.Wherein, described outer stopper 3-5 can also can only be arranged at the part week edge of described end face along whole all edges of described end face edge.Only describe in the present embodiment with the situation that is provided with outer stopper 3-5 on whole all edges.

In addition, can also be provided with the firing chamber in described piston head 3 and end face opposing end faces towards fitting seat 2-1 shown in Figure 1.The shape of the firing chamber of present embodiment such as Fig. 2 and shown in Figure 4, comprise by near any zone of top to respect to the main groove 3-6 that the edge extends, the degree of depth shoals gradually, width narrows down gradually, and described main groove 3-6 extend to the top center position to the both sides bifurcated form, with respect to a groove 3-7 of described main groove 3-6 symmetry.The piston applications that will comprise described firing chamber can improve combustion efficiency when diesel engine, reduce burning and consume.Certainly, the firing chamber of other shape also can be set, repeat no more here at the end face of described piston head 3.

Below in conjunction with Fig. 5, Fig. 6, Fig. 7 and Fig. 8 embodiment's of the present utility model piston skirt 2 is described.

Fig. 5 is the plan view of embodiment's of the present utility model piston skirt 2; Fig. 6 is the bottom view in skirt section 2, Fig. 7 be among Fig. 5 along the generalized section of XX ' direction, Fig. 8 is along the generalized section of YY ' direction among Fig. 5.

Please refer to Fig. 7 and Fig. 8, the piston skirt 2 in the present embodiment comprises fitting seat 2-1 and the extension part 2-2 integrally formed with described fitting seat 2-1.Wherein, described fitting seat 2-1 can be used as the pedestal when described skirt section 2 and top 3 and piston seat 1 assembling.Described extension part 2-2 extends along the side of described fitting seat 2-1, and the length of extension can be determined according to the actual demand of piston.For example, when being used for two stroke diesel engine, the extension part 2-2 in this skirt section 2 can be used as the parts that block that block relief opening; In addition, this extension part 2-2 also has leading role.Those skilled in the art can no longer launch to discuss here according to the instruction of this specification length and the shape in conjunction with actual demand design piston seat 2-2.

Please refer to Fig. 5, Fig. 6, Fig. 7 and Fig. 8, the corresponding position of blind hole 3-2 with top 3 shown in Figure 3 on the fitting seat 2-1 of described piston skirt 2 is provided with through hole 2-3.When described through hole 2-3 is used for that described top 3 is assemblied in described fitting seat, cooperate fixing described top 3 with blind hole 3-2 shown in Figure 3 and link 4 shown in Figure 1.

Described through hole 2-3 can be a tapped hole, can be common circular hole also, and in the present embodiment, described through hole is common circular hole.The distribution of described through hole 2-3 and number can be identical with described blind hole 3-2.

On described fitting seat 2-1, also be provided with positioning through hole 2-4 with blind hole 3-4 relevant position, location shown in Figure 4.In the present embodiment, described positioning through hole 2-4 is positioned at described fitting seat 2-1 central position.Described positioning through hole 2-4 cooperates with locating stud 5 shown in Figure 1 and location blind hole 3-4 shown in Figure 4, is used for location and guiding when assembling.Certainly, the locating stud 5 in the present embodiment is a hollow pin, also as cooling or lubricated oil supply gallery.

Corresponding position, arbitrary position with Fig. 3 or annular groove 3-3 shown in Figure 4 on described fitting seat 2-1 also is provided with return port 2-7, the 2-7 of return port described in the present embodiment is arranged at and described straight trough 3-8 bearing of trend opposite direction and the position that communicates with annular groove, as Fig. 5 or Fig. 6 or shown in Figure 7.Described return port 2-7 can be the through hole of arbitrary shape, is circular port in the present embodiment.Described return port 2-7 cooperates with oil supply gallery in top 3 and the piston seat described below 1, forms current return circuit, is mainly used in to be back in the cylinder through the cold oil or the lubricant oil of the oil supply gallery of piston head 3.

The edge that is used to assemble the end face at described top 3 at described fitting seat 2-1 also is provided with inner stopper 2-5, and the position of described inner stopper 2-5 is corresponding with outer stopper 3-5 shown in Figure 4, and size matches with described outer stopper 3-5.

Wherein, described inner stopper 2-5 can also can only be arranged at the part week edge of described end face along whole all edges of described fitting seat 2-1 end face edge.In the present embodiment with outer stopper shown in Figure 4 to adaptation, whole week along being provided with inner stopper 2-5.

By being arranged at the outer stopper 3-5 on the described top 3 and being arranged at inner stopper 2-5 on the described assembly department, when being installed on top 3 on the fitting seat 2-1, has leading role on the one hand; Also has positioning action on the one hand.Certainly, other structure and parts can also be set or cooperate, to reach described location and leading role with other structure or parts.For example, in the present embodiment, also use locating stud and positioning hole (comprising through hole and blind hole) to position simultaneously and lead.

In addition, also can part week of the end face of fitting seat 2-1 along inner stopper is set, end face part week at described top 3 along being provided with and the corresponding outer stopper of this inner stopper.

In addition, loss of weight groove 2-6 can also be set on described fitting seat 2-1,, alleviating the weight of piston skirt 2, thereby alleviate the weight of whole piston as Fig. 7 and Fig. 8.In addition, described loss of weight groove 2-6 can cooperate with the annular groove 3-3 in the top 3, forms the fuel feeding path.Loss of weight groove 2-6 can certainly be set.

Below in conjunction with Fig. 9 and Figure 10 embodiment's of the present utility model piston seat 1 is described.

Fig. 9 is the schematic representation of embodiment's of the present utility model piston seat, and Figure 10 is the schematic representation of joint of one of them end of embodiment's of the present utility model piston seat.

Please refer to Fig. 9, embodiment's of the present utility model piston seat 1 has two relative directed side 1-2, and the surface of described directed side 1-2 is an arc shaped surface, so that when being assemblied in described piston in the cylinder, can match with the inwall of cylinder.

On described piston seat 2, also be provided with the circular slider accommodation hole 1-1 of the smooth block that is used to hold circular slider-crank mechanism.Wherein, the diameter of described circular slider accommodation hole 1-1, rotates with this crank pin that drives in the eccentric circular hole that is installed on smooth block so that when smooth block is installed on wherein, can rotate relative to described piston seat 2 greater than the smooth block that is assemblied in wherein.

In addition,, can carry out particular processing, form wearing face the inner wall surface of described circular slider accommodation hole 1-1 for improving abrasive resistance; Perhaps sliding bearing, for example bearing shell are installed in described inner wall surface.For reducing friction, also can rolling bearing be installed at the inwall of described circular slider accommodation hole 1-1, for example, needle bearing, the friction when rotating, the capacity loss when reducing movement conversion to reduce smooth block.Certainly, also can take other measure to improve the wear-resisting property of circular slider accommodation hole and reduce and rub, enumerate no longer one by one here.

In addition, in the both sides of described piston seat 1, along the end face edge of described circular slider accommodation hole 1-1 and through the zone of described piston seat 1 waist strengthening rib (not shown) can also be set, to strengthen the intensity of this piston seat waist.For example, described strengthening rib can be along the annular catch on the whole all edges of described circular slider accommodation hole 1-1 or along the arc block plate on all edges of described circular slider accommodation hole 1-1 part.Described strengthening rib can fixedly be assemblied on the described piston seat 1 in modes such as riveted joint, welding or screw connections, no longer launches here to discuss.

One of them end at described piston seat 1 also is provided with joint 1-3.Please refer to Figure 10, described joint 1-3 is stretched out by the end of described piston seat 1 and forms.Be provided with connecting through hole 1-4 with the corresponding position of through hole 2-3 shown in Figure 8 on described joint 1-3, described connecting through hole 1-4 and described through hole 2-3 and link 4 shown in Figure 1 cooperate, and are used for described piston seat 1 fixedly is assembled together with skirt section 2.Wherein, described connecting through hole 1-4 can be a tapped hole, can be common circular hole also, is common circular hole in the present embodiment.

On the end face that joint 1-3 is set of described piston seat 1, also be provided with location blind hole 1-5, cooperate with locating stud 5 shown in Figure 1 when described location blind hole 1-5 is used for this piston seat 1 with skirt section 2 fixing assemblings to play the role of positioning with Fig. 7 and the corresponding position of positioning through hole 2-4 shown in Figure 8.Certainly, other positioning element or structure can also be set, when the two is installed, to play the role of positioning.

Described location blind hole 1-5 is communicated with oil supply gallery 1-6 on this piston seat 1, as Fig. 1 and shown in Figure 10.In the present embodiment, oil supply gallery 1-6 also is communicated with circular slider accommodation hole 1-1.Thereby this oil supply gallery 1-6 can be communicated with smooth block in being arranged at this circular slider accommodation hole 1-1 and the oil supply gallery that passes on the crank pin of eccentric circle slide opening of described smooth block.

During assembling, make locating stud shown in Figure 15 pass positioning through hole 2-4 among the fitting seat 2-1 in described skirt section 2, and stretch out by the two ends of described through hole 2-4, can be with reference to figure 1, described piston head 3 is placed fitting seat 2-1 and the opposite end face of bearing of trend its extension part 2-2 of described piston skirt 2, and the end face at described top 3 and the end face of described fitting seat 2-1 are close together.In addition, an end of described locating stud 5 is inserted among the location blind hole 3-4 in the described top 3; Blind hole 3-2 on the described top 3 and the through hole 2-3 on the described fitting seat 2-1 are aligned; Outer stopper 3-5 on the described top 3 matches with inner stopper 2-5 on the described fitting seat 2-1.

Place the fitting seat 2-1 of described piston skirt 2 to go up and the end face opposing end faces that described top 3 is installed the joint 1-3 of described piston seat 1, as shown in Figure 1, the other end of locating stud 5 is inserted among the location blind hole 1-5 on the described piston seat 1, and connecting through hole 1-4 on the described joint 1-3 and the through hole 2-3 on the described fitting seat 2-1 are aligned, and simultaneously with described piston head 3 on blind hole 3-2 align.Then, link 4 is passed the connecting through hole 1-4 on the described joint, the through hole 2-3 on the assembly department successively, insert among the blind hole 3-2 at described top 3.In the present embodiment, described link 4 is screw or bolt.

Certainly, also can be the typical circular through hole in the position of the blind hole 3-2 at described top 3, at this moment, available rivet fixedly is assembled together the fitting seat 2-1 in described top 3, skirt section 2 and the joint 1-3 of piston seat 1 as link.In addition, described link also can be a screw bolt and nut.

The material of described piston head 3 can be to be carbon steel, alloyed steel, stainless steel or titanium alloy, to improve the intensity of piston.The skirt section 2 of described piston and the material of piston seat 1 are can aluminum alloy, to alleviate the quality of piston integral body.

In embodiment's of the present utility model piston, the location blind hole 1-5 of described piston seat 1 is communicated with the oil supply gallery of this piston seat 1; The location blind hole 3-4 at described top 3 is communicated with the oil supply gallery at this top; Be communicated with the oil supply gallery at described top 3 by the oil supply gallery of described locating stud 5, and form return path by return port 2-7 with described piston seat 1.The piston that can realize embodiment of the present utility model is in the lubricated work down of pressure oil with to the cooling of piston head 3, can reduce the heat load of piston to the cooling of piston head 3, improve the operating conditions of piston and piston ring, increase reliability, can satisfy the requirement of the piston of high speed, high-intensity internal-combustion engine.

In addition, piston comprises top 3, skirt section 2 and piston seat 1 three parts at least, and above-mentioned three partial fixings are assembled together.Can select the material of piston each several part as required, satisfying different needs, thereby improve versatility, for example, when needs reduced cost, above-mentioned each several part all can be with steel or cast iron manufacturing; And when needs reduce total quality and don't wish to sacrifice intensity, can adopt the top with alloyed steel or carbon steel, remaining part is with the firm top and aluminum skirt structure of aluminum alloy.

In addition, embodiment's of the present utility model piston each several part can be made respectively, then each several part is fitted together, and with respect to head (or bizet) and the integrally formed piston of piston seat, simplified manufacturing process, and combination is also very convenient, adapts to produce in batches.

Among the embodiment of the present utility model, by the connecting through hole 1-4 on the joint 1-3 of through hole 2-3 on the fitting seat 2-1 in the blind hole 3-2 on link 4 and the top 3, skirt section 2 and piston seat 1, simultaneously described top 3, skirt section 2 and piston seat 1 fixedly are assembled together.In addition, assembling can be fixed with described top 3 and piston seat 1 respectively in institute skirt section 2, is not described in detail here, and those skilled in the art can make corresponding change according to the instruction of this specification.

In addition, also described locating stud 5 can be set, the through hole on the fitting seat 2-1 on the skirt section 2 is communicated with the oil supply gallery on top 3 and the piston seat 1 as connecting passage, is not described in detail here.

In the above-described embodiment, only be that example is illustrated with the single action piston, in the case, the other end of this piston seat can be unsettled, also can install to be used for inserting of counterweight.Should be appreciated that at the other end and also can assemble other skirt section and top, form two-way ram, as shown in figure 11 in identical with the above embodiments or akin mode.Certainly, this other end can assemble the piston crown or the head of the circular slider-crank mechanism of other form.Need to prove; the foregoing description should be as the restriction to claim protection domain of the present utility model to the description of ins and outs; under the condition of the protection domain that does not deviate from claim; those skilled in the art are according to embodiment's of the present utility model instruction, with recognize many other distortion, substitute or revise.

In addition, the piston described in the foregoing description can be applied in the single-cylinder engine of circular slider-crank mechanism, thereby can improve the stability of the work of internal-combustion engine, increases the service life.

Though the utility model with preferred embodiment openly as above; but it is not to be used for limiting the utility model; any those skilled in the art are not in breaking away from spirit and scope of the present utility model; can make possible change and modification, therefore protection domain of the present utility model should be as the criterion with the scope that the utility model claim is defined.

Claims (18)

1, a kind of piston of circular slider-crank mechanism is characterized in that comprising at least: top, skirt section and piston seat; Described skirt section comprises fitting seat and the extension part that extends along described fitting seat side; Described piston seat is provided with circular slider accommodation hole; Described roof anchorage is assemblied on the described fitting seat bearing of trend opposing end faces with described extension part; One end of described piston seat fixedly is assemblied on the described fitting seat and the end face opposing end faces that described top is installed;

On described top and piston seat, be provided with oil supply gallery; The fitting seat in described skirt section is provided with the connecting passage of the oil supply gallery that is communicated with described top and piston seat, and is provided with the return port that is communicated with the oil supply gallery at described top.

2, the piston of circular slider-crank mechanism as claimed in claim 1, it is characterized in that: on described fitting seat, also be provided with positioning through hole, at described top and the end face of the fixing assembling of piston seat and described fitting seat also be provided with the location blind hole with described positioning through hole relevant position;

Location blind hole on the described piston seat is communicated with the oil supply gallery of this piston seat; Location blind hole on the described top is communicated with the oil supply gallery at this top;

Described connecting passage is the hollow locating stud;

During assembling, described hollow locating stud passes described positioning through hole and inserts respectively in the location blind hole of joint of described top and piston seat; Be communicated with the oil supply gallery of piston seat by the oil supply gallery of described hollow locating stud described piston head.

3, the piston of circular slider-crank mechanism as claimed in claim 2 is characterized in that: the oil supply gallery at described top comprises and is arranged at described top towards annular groove end face, that be centered close to these end face central authorities of described fitting seat and the straight trough that described annular groove is communicated with the location blind hole at described top.

4, the piston of circular slider-crank mechanism as claimed in claim 3 is characterized in that: described return port is arranged on the fitting seat in described skirt section and described straight trough bearing of trend opposite direction and the position that communicates with described annular groove.

5, as the piston of the described circular slider-crank mechanism of the arbitrary claim of claim 2 to 4, it is characterized in that: the oil supply gallery that is communicated with location this piston seat blind hole on the described piston seat is communicated with circular slider accommodation hole.

6, as the piston of the described circular slider-crank mechanism of the arbitrary claim of claim 2 to 4, it is characterized in that: the fitting seat in described skirt section is provided with through hole, is provided with blind hole at described top towards the end face of described fitting seat and with the corresponding position of described through hole; During assembling, link passes described through hole and is inserted in the described blind hole, described roof anchorage is assemblied on the fitting seat in described skirt section.

7, the piston of circular slider-crank mechanism as claimed in claim 6 is characterized in that: the end with the fixing assembling in described skirt section at described piston seat is provided with joint; Be provided with connecting through hole with described fitting seat through hole relevant position on described joint, described link also passes described connecting through hole, and described piston seat fixedly is assemblied on the described fitting seat.

8, the piston of circular slider-crank mechanism as claimed in claim 7 is characterized in that: described blind hole is a tapped hole, and described through hole and connecting through hole are common circular hole, and described link is a bolt.

9, as the piston of the described circular slider-crank mechanism of the arbitrary claim of claim 2 to 4, it is characterized in that: the fitting seat in described skirt section is provided with through hole, also is provided with through hole in the corresponding position of the through hole in described top and described skirt section;

The end with the fixing assembling in described skirt section at described piston seat is provided with joint; On described joint, be provided with connecting through hole with described fitting seat through hole relevant position,

During assembling, described link passes the through hole on described connecting through hole, the fitting seat and the through hole at top simultaneously, and described piston seat and roof anchorage are assemblied on the described fitting seat;

Wherein, described link is rivet or screw bolt and nut.

10, as the piston of the described circular slider-crank mechanism of the arbitrary claim of claim 1 to 4, it is characterized in that: the edge that is used to assemble the end face at described top at described fitting seat is provided with outer stopper, is provided with the inner stopper that matches with described outer stopper towards the edge of the end face of described fitting seat at described piston head.

11, as the piston of the described circular slider-crank mechanism of the arbitrary claim of claim 1 to 4, it is characterized in that: described piston head be provided with the firing chamber towards the end face opposing end faces of described fitting seat.

12, the piston of circular slider-crank mechanism as claimed in claim 11, it is characterized in that: described firing chamber comprise by near arbitrary zone of top to respect to the main groove that the edge extends, the degree of depth shoals gradually, width narrows down gradually, and described main groove extend to the top center position to the both sides bifurcated form, with respect to a groove of described main groove symmetry.

13, as the piston of the described circular slider-crank mechanism of the arbitrary claim of claim 1 to 4, it is characterized in that: the material of described piston head is carbon steel, alloyed steel, stainless steel or titanium alloy, the material of described piston skirt is an aluminum alloy, and the material of described piston seat is an aluminum alloy.

14, as the piston of the described circular slider-crank mechanism of the arbitrary claim of claim 1 to 4, it is characterized in that: in the both sides of described piston seat, be provided with strengthening rib along the end face edge of described circular slider accommodation hole and through the zone of described piston seat waist.

15, the piston of circular slider-crank mechanism as claimed in claim 14 is characterized in that: described strengthening rib is for along the annular catch on the whole all edges of described circular slider accommodation hole or along the arc block plate on all edges of described circular slider accommodation hole part.

16, as the piston of the described circular slider-crank mechanism of the arbitrary claim of claim 1 to 4, it is characterized in that: the other end at described piston seat is equipped with skirt section identical with this end and piston head.

17, as the piston of the described circular slider-crank mechanism of the arbitrary claim of claim 1 to 4, it is characterized in that: be equipped with counterweight at the other end of described piston seat and insert.

18, a kind of internal-combustion engine of circular slider-crank mechanism is characterized in that: comprise the described piston of the arbitrary claim of claim 1 to 17.

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