CN203670021U - Lubricating structure for connecting rod small end bush - Google Patents

Lubricating structure for connecting rod small end bush Download PDF

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Publication number
CN203670021U
CN203670021U CN201320709859.0U CN201320709859U CN203670021U CN 203670021 U CN203670021 U CN 203670021U CN 201320709859 U CN201320709859 U CN 201320709859U CN 203670021 U CN203670021 U CN 203670021U
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China
Prior art keywords
connecting rod
small end
oil
piston
rod small
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Active
Application number
CN201320709859.0U
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Chinese (zh)
Inventor
张春贤
苏洪吉
孙朋莎
周志亮
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Dongfeng Commercial Vehicle Co Ltd
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Dongfeng Commercial Vehicle Co Ltd
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Priority to CN201320709859.0U priority Critical patent/CN203670021U/en
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Abstract

A lubricating structure for a connecting rod small end bush comprises a piston body (1), a piston pin (2) and a connecting rod small end (3), a connection rod bush (4) is pressed on a small end hole of the connecting rod small end (3), the connecting rod small end (3) is connected with the piston body (1) through the piston pin (2), a cooling oil way, an oil input way (7) and an oil output way (6) are arranged on the piston body (1), wherein the oil input way (7) and the oil output way (6) are communicated with the cooling oil way, an inclined oil hole (8) communicated with the cooling oil way is formed beside the oil output way (6) on the inner wall of the piston body (1). The lubricating structure for the connecting rod small end bush is simple in structure and novel in design, well ensures lubricating and cooling of the connecting rod small end bush, and can well adjust cooling temperature of the cooling oil way of the piston.

Description

A kind of lubricating structure of lining of connecting rod small end
Technical field
The utility model relates to a kind of lining of connecting rod small end structure, relates in particular a kind of lubricating structure of lining of connecting rod small end, belongs to piston of automobile engine group lubricating component technical field.
Background technique
Lining of connecting rod small end is directly connecting piston and connecting rod in motor, in the process of transmitting force and moment, plays an important role; Lining of connecting rod small end requires that bearing capacity is large, compact structure, manufacturing process are good, and has good interchangeability and convenient for maintaining, and the quality of its greasy property has important impact to the working condition of motor.The lubricated employing conventionally of lining of connecting rod small end splash system lubrication, splash system lubrication is to have the lubricated oil droplet splashing when oil collecting hole is collected engine running on connecting rod small end top, forms wedge gap by the swing of connecting rod small end between wrist pin and lining of connecting rod small end, but, this splash system lubrication is passive discontinuous lubricating, the matching gap of wrist pin and lining of connecting rod small end is very little, the lubricants capacity of storage is limited, being only suitable for the motor that detonation pressure is lower uses, along with the development trend of the high detonation pressure of motor, this lubricating system can not meet lining of connecting rod small end lubricating requirement, the discontinuity of oil film can cause wrist pin directly to contact with lining of connecting rod small end, produce high temperature, thereby cause connecting rod small end hole and wrist pin surface of contact that " interlock " occurs, too high temperature also can be conducted and be made wrist pin nose end that same damage also can occur by heat, when serious, even cause piston scraping.
Chinese patent notice of authorization number: CN201050413Y, notice of authorization day: April 23 in 2008, day, were called: in the utility model patent of " a kind of engine piston ", disclose a kind of engine piston, comprise piston body, the oil input channel and the oil road that in piston body, are provided with cooling oil duct and are communicated with this cooling oil duct, on the inwall of piston body, be respectively equipped with two inclined oil hole of air that are communicated with cooling oil duct, these two inclined oil hole of air are respectively towards the connecting rod small end end that is arranged in piston cavity, and connecting rod small end is provided with oil through.This kind of engine piston, lubricated more abundant to the surface of contact between piston and connecting rob bushing.But in piston, jacking oil duct side has also been provided with inclined oil hole of air in this model utility, make parts of lubricating oil also not carry out coolingly just flowing out from this inclined oil hole of air to piston, increase the heat load of piston one side of something, reduce piston reliability; In this model utility, on connecting rod small end, be provided with oil through, along with the continuous lifting of engine load, more and more employing steel pistons than before aluminium piston weight have increased a lot, the tension load that connecting rod small end bears is more and more higher, therefore offers oil through and reduced the reliability of connecting rod at connecting rod small end.
Summary of the invention
The purpose of this utility model be the piston one side of something having increased for existing lining of connecting rod small end lubricating structure heat load, reduced the problems such as the reliability of connecting rod, a kind of lubricating structure of lining of connecting rod small end is provided.
For achieving the above object, technical solution of the present utility model is: a kind of lubricating structure of lining of connecting rod small end, comprise piston only, wrist pin and connecting rod small end, on the microcephaly hole of described connecting rod small end, be pressed with connecting rob bushing, connecting rod small end is connected with piston only by wrist pin, the oil input channel and the oil road that on described piston only, are provided with cooling oil duct and are connected with this cooling oil duct, the other inclined oil hole of air being connected with cooling oil duct that offers of oil road on the inwall of described piston only.
Described inclined oil hole of air is positioned on the midplane on piston only Inner top, and inclined oil hole of air is towards connecting rod swing direction.
The diameter of described inclined oil hole of air is 4mm.
Compared with prior art, the beneficial effects of the utility model are:
1. simple in structure, novel in design, well guarantee the lubricated of lining of connecting rod small end and heat radiation, and the chilling temperature of regulating piston cooling oil duct well.The other inclined oil hole of air being connected with cooling oil duct that offers of the utility model oil road on the inwall of piston only, the machine oil ejecting from inclined oil hole of air sprays connecting rod small end and wrist pin, oil groove by connecting rob bushing imports rubbing surface, realizes effectively lubricated and heat radiation of lining of connecting rod small end; Meanwhile, test of many times proves, the utility model also has obvious effect to the chilling temperature that regulates piston cooling oil passage, makes piston top temperature more reasonable, has reduced piston Inner top mean temperature.
2. the utility model only offers inclined oil hole of air on oil road side, has improved the cooling effect of piston head, has improved piston reliability; And connecting rod small end is not established oil through, improve the reliability of connecting rod small end, reduce technology difficulty.
Accompanying drawing explanation
Fig. 1 is the worm's eye view of engine piston in the utility model.
Fig. 2 is the A-A sectional view of Fig. 1.
Fig. 3 is the B-B sectional view of Fig. 1.
Fig. 4 is connecting rob bushing sectional view in the utility model.
In figure, piston only 1, wrist pin 2, connecting rod small end 3, connecting rob bushing 4, lining oil groove 5, oil road 6, oil input channel 7, inclined oil hole of air 8.
Embodiment
Below in conjunction with accompanying drawing explanation and embodiment, the utility model is described in further detail.
Referring to Fig. 1-Fig. 4, a kind of lubricating structure of lining of connecting rod small end, comprises piston only 1, wrist pin 2 and connecting rod small end 3, on the microcephaly hole of described connecting rod small end 3, is pressed with connecting rob bushing 4, and connecting rod small end 3 is connected with piston only 1 by wrist pin 2.The oil input channel 7 and the oil road 6 that on described piston only 1, are provided with cooling oil duct and are connected with this cooling oil duct, the other inclined oil hole of air 8 being connected with cooling oil duct that offers of oil road 6 on the inwall of piston only 1; Described inclined oil hole of air 8 is positioned on the midplane on piston only 1 Inner top, and inclined oil hole of air 8 is towards connecting rod swing direction, and cold oil is by the lubricated lining of connecting rod small end of inclined oil hole of air 8.Described inclined oil hole of air 8 can not be excessive, in order to avoid affect piston intensity, can not be too small, can affect lubricants capacity; Preferably, the diameter of described inclined oil hole of air 8 is 4mm, has taken into account like this piston intensity and lubricants capacity.
Referring to Fig. 1-Fig. 4, when work, machine oil sprays into oil input channel 7, and after cooling oil duct is cooling to piston only 1, a part enters piston only 1 inner chamber from oil road 6, and another part sprays in inclined oil hole of air 8 along the direction of arrow, thereby is sprayed on the outer wall of connecting rod small end 3; On connecting rod small end 3, do not bore oil collecting hole, machine oil imports rubbing surface by lining oil groove 5, thereby realizes effectively lubricated and heat radiation of lining of connecting rod small end.
Above content is in conjunction with concrete preferred implementation further detailed description of the utility model, can not assert that concrete enforcement of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field, without departing from the concept of the premise utility, can also make some simple deduction or replace, said structure all should be considered as belonging to protection domain of the present utility model.

Claims (2)

1. the lubricating structure of a lining of connecting rod small end, comprise piston only (1), wrist pin (2) and connecting rod small end (3), on the microcephaly hole of described connecting rod small end (3), be pressed with connecting rob bushing (4), connecting rod small end (3) is connected with piston only (1) by wrist pin (2), the oil input channel (7) and the oil road (6) that on described piston only (1), are provided with cooling oil duct and are connected with this cooling oil duct, it is characterized in that: the other inclined oil hole of air (8) being connected with cooling oil duct that offers of oil road on the inwall of piston only (1) (6), described inclined oil hole of air (8) is positioned on the midplane on piston only (1) Inner top, and inclined oil hole of air (8) is towards connecting rod swing direction.
2. the lubricating structure of a kind of lining of connecting rod small end according to claim 1, is characterized in that: the diameter of described inclined oil hole of air (8) is 4mm.
CN201320709859.0U 2013-11-12 2013-11-12 Lubricating structure for connecting rod small end bush Active CN203670021U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201320709859.0U CN203670021U (en) 2013-11-12 2013-11-12 Lubricating structure for connecting rod small end bush

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201320709859.0U CN203670021U (en) 2013-11-12 2013-11-12 Lubricating structure for connecting rod small end bush

Publications (1)

Publication Number Publication Date
CN203670021U true CN203670021U (en) 2014-06-25

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CN201320709859.0U Active CN203670021U (en) 2013-11-12 2013-11-12 Lubricating structure for connecting rod small end bush

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CN (1) CN203670021U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107228647A (en) * 2016-03-23 2017-10-03 新昌县达科机电产品设计有限公司 Piston pin connecting rob bushing gap size positions accessory part
CN114251152A (en) * 2020-09-22 2022-03-29 马勒汽车技术(中国)有限公司 Lubrication mechanism for pin joint pair of internal combustion engine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107228647A (en) * 2016-03-23 2017-10-03 新昌县达科机电产品设计有限公司 Piston pin connecting rob bushing gap size positions accessory part
CN114251152A (en) * 2020-09-22 2022-03-29 马勒汽车技术(中国)有限公司 Lubrication mechanism for pin joint pair of internal combustion engine

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