CN204984627U

CN204984627U - There is not round pin type engine piston rod group

Info

Publication number: CN204984627U
Application number: CN201520786873.XU
Authority: CN
Inventors: 尹建
Original assignee: Individual
Current assignee: Individual
Priority date: 2015-10-13
Filing date: 2015-10-13
Publication date: 2016-01-20
Anticipated expiration: 2025-10-13

Abstract

There is not round pin type engine piston rod group, including piston crown and connecting rod, the piston skirt has been left out on the piston crown, be equipped with the connecting block on the piston crown, set up the mating holes on the connecting block, the one end of connecting rod is the hinge joint head, hinge joint head and mating holes cooperation, the hinge joint head is sphere or cambered surface with mating holes complex face, the connecting rod can use the hinge joint head to swing as the relative connecting block of fulcrum, the other end of connecting rod is the crank connection ring, the axis of piston crown and the interval between the hinge joint head pivot point point are H, H> 0. Piston skirt, piston pin and the piston pin snap ring of current piston rod group have been got rid of to it to the purpose that reduces motion weight, energy saving and emission reduction has been reached. Simultaneously, since the weight that by a wide margin reduces and the body only to holistic volume of reducible engine and weight reduce manufacturing cost and increase enterprise profit.

Description

Without pin engine piston connecting rod group

Technical field

The utility model relates to a kind of piston connecting rod unit, specifically a kind of without pin engine piston connecting rod group.

Background technique

The piston of available engine piston connecting rod unit must comprise piston crown and piston skirt, and its reason is that the pin-and-hole that present piston must be offered by piston skirt installs wrist pin, and by wrist pin and rod hinge connection.For guaranteeing piston and connecting rod stable connection, wrist pin must install piston pin snap ring.Piston skirt, wrist pin and piston pin snap ring are that piston connecting rod unit weight cannot alleviate all the time, the reason that volume cannot reduce, but weight is large, volume certainly exists greatly the problem that motor operation energy consumption is high and manufacture cost is high.

Model utility content

The purpose of this utility model is to provide one without pin engine piston connecting rod group, and it significantly can reduce quality and the volume of piston connecting rod unit, thus reduces operation energy consumption and the manufacture cost of overall engine.

The utility model for achieving the above object, be achieved through the following technical solutions: without pin engine piston connecting rod group, comprise piston crown and connecting rod, piston crown eliminates piston skirt, piston crown is provided with contiguous block, contiguous block offers matching hole, one end of connecting rod is piston connecting head, piston connecting head coordinates with matching hole, the face that piston connecting head coordinates with matching hole is sphere or cambered surface, connecting rod can with piston connecting head for the relative contiguous block of fulcrum swings, the other end of connecting rod is crank connecting ring, spacing between the medial axis of piston crown and the fulcrum of piston connecting head is H, H>0.

In order to realize the purpose of this utility model further, can also by the following technical solutions: described contiguous block is provided with V-shaped groove, and V-shaped groove communicates with matching hole.The top of described piston crown is provided with firing chamber.Be provided with oil leab in described connecting rod, offer machine oil cooling chamber in piston crown, machine oil cooling chamber is communicated with crank connecting ring by oil leab.

The utility model has the advantage of: it removes the piston skirt of existing piston connecting rod unit, wrist pin and piston pin snap ring, thus reach reduction moving mass, the object of energy-saving and emission-reduction.Meanwhile, due to the weight that significantly reduces and body only, thus the volume and weight of overall engine can be reduced, reduce manufacture cost and increase enterprise profit.Owing to eliminating piston skirt, wrist pin and piston pin snap ring, change by contiguous block 12 and connecting rod 5 coordination hinge, therefore, as shown in Figure 2, the hinge point of piston and connecting rod can be made significantly to narrow, and can under the prerequisite not changing existing cylinder block body sum structure shape, also have the following advantages: 1, when piston moves to lower dead center, the hinge point of piston can enter between two balancing weights 6 of crank 7, significantly increase the utilization ratio in space in motor, increase the stroke distances of piston, increase suction tolerance.2, the length of connecting rod 5 can effectively be shortened.3, crank 7 can be made to enter the outside outputting power in maximum arm of force position in advance, reach energy-conservation object.4, can depart from the distance H of medial axis L by oversize piston link rotatable center o, because off normal increases, the mechanical interference that when can eliminate engine combustion work more up hill and dale, dead point is caused, improves the smoothness of engine operation.

Accompanying drawing explanation

Fig. 1 is the structural representation of piston connecting rod unit described in the utility model; Fig. 2 is the A-A sectional structure schematic diagram of Fig. 1; The motion schematic diagram of the piston connecting rod unit of Fig. 3 available engine; Fig. 4 is the motion schematic diagram of piston connecting rod unit described in the utility model, and be same motor by Fig. 4 and Fig. 3 known in figure, the connecting rod in Fig. 4 is shorter; Fig. 5 is the structural representation of described piston head; Fig. 6 is the structural representation of described connecting rod.

Reference character: 1 piston crown 3 machine oil cooling chamber 4 oil leab 5 connecting rod 6 balancing weight 7 crank 8 piston connecting head 9 crank connecting ring 10 matching hole 11 bent axle 12 contiguous block 13V shape groove L medial axis, firing chamber 2 o center of rotation.

Embodiment

Described in the utility model without pin engine piston connecting rod group, as shown in Figure 1, comprise piston crown 2 and connecting rod 5.As shown in Figure 2, piston crown 2 eliminates piston skirt, namely piston described in the utility model only has piston crown 2 and does not have piston skirt compared with existing piston, thus significantly alleviates the weight and volume of piston.As shown in Figure 5, piston crown 2 is provided with contiguous block 12, contiguous block 12 is offered matching hole 10.As shown in Figure 6, one end of connecting rod 5 is piston connecting head 8.As shown in Figure 1, piston connecting head 8 coordinates with matching hole 10, and the face that piston connecting head 8 coordinates with matching hole 10 is sphere or cambered surface, so that reduce frictional force in relative rotation.Connecting rod 5 can swing for the relative contiguous block 12 of fulcrum with piston connecting head 8, and the other end of connecting rod 5 is crank connecting rings 9, and crank connecting ring 9 can be hinged with the crank 7 of bent axle 11.Spacing between the medial axis L of the piston crown 2 and fulcrum o of piston connecting head 8 is H, H>0, and namely piston connecting head 8 departs from the medial axis L of piston crown 2, effectively can eliminate the dead point of engine operation.Compression ring, oil ring can be installed in piston crown 2 periphery.Realize hinged because matching hole 10 coordinates with piston connecting head 8, therefore, under the prerequisite of identical piston diameter, contiguous block 12 can provide larger skew space for piston connecting head 8 departs from medial axis L, and namely the value of H is larger, thus more effectively can eliminate dead point.

As shown in Figure 5, described contiguous block 12 is provided with V-shaped groove 13, and V-shaped groove 13 communicates with matching hole 10.The amplitude of fluctuation that V-shaped groove 13 can expand the relative contiguous block 12 of connecting rod 5 moves, to increase effective work done distance.

As shown in Figure 1, the top of described piston crown 2 is provided with firing chamber 1, to improve work doing efficiency.

As shown in Figure 2, be provided with oil leab 4 in described connecting rod 5, offer machine oil cooling chamber 3 in piston crown 2, machine oil cooling chamber 3 is communicated with crank connecting ring 9 by oil leab 4, to improve lubrication effect.

As Fig. 3 and Fig. 4 is known, under the advance that engine casing is identical with crank, α 1 is the maximum work done region of existing piston connecting rod unit, α 2 is the maximum work done region of the not eccentric piston connecting rod unit without piston skirt, wrist pin and piston pin snap ring, and α 3 is maximum work done regions of piston connecting rod unit described in the utility model; Wherein α 1< α 2< α 3, therefore piston connecting rod unit described in the utility model can make crank 7 more early enter maximum work done region, energy-saving effect is better.

The technical solution of the utility model is not restricted in the scope of embodiment described in the utility model.The technology contents of the not detailed description of the utility model is known technology.

Claims

1. without pin engine piston connecting rod group, comprise piston crown (2) and connecting rod (5), it is characterized in that: (2) eliminate piston skirt to piston crown, piston crown (2) is provided with contiguous block (12), contiguous block (12) is offered matching hole (10), one end of connecting rod (5) is piston connecting head (8), piston connecting head (8) coordinates with matching hole (10), the face that piston connecting head (8) coordinates with matching hole (10) is sphere or cambered surface, connecting rod (5) can with piston connecting head (8) for the relative contiguous block of fulcrum (12) swings, the other end of connecting rod (5) is crank connecting ring (9), spacing between the medial axis (L) of piston crown (2) and the fulcrum (o) of piston connecting head (8) is H, H>0.

2. according to claim 1 without pin engine piston connecting rod group, it is characterized in that: described contiguous block (12) is provided with V-shaped groove (13), V-shaped groove (13) communicates with matching hole (10).

3. according to claim 1 without pin engine piston connecting rod group, it is characterized in that: the top of described piston crown (2) is provided with firing chamber (1).

4. according to claim 1 without pin engine piston connecting rod group, it is characterized in that: in described connecting rod (5), be provided with oil leab (4), offer machine oil cooling chamber (3) in piston crown (2), machine oil cooling chamber (3) is communicated with crank connecting ring (9) by oil leab (4).