CN202381187U

CN202381187U - Piston

Info

Publication number: CN202381187U
Application number: CN2011205649458U
Authority: CN
Inventors: 廖君慧; 林剑明; 肖鸿飞; 黄祖东
Original assignee: Hunan Jiangbin Machinery Group Co Ltd
Current assignee: Hunan Jiangbin Machinery Group Co Ltd
Priority date: 2011-12-29
Filing date: 2011-12-29
Publication date: 2012-08-15
Anticipated expiration: 2021-12-29

Abstract

The utility model discloses a piston, which belongs to the technical field of an engine and comprises a pin hole, a retaining ring groove and a face window and further comprises an oil return structure. The oil return structure comprises a strengthening boss arranged at the cross position of the pin hole and the face window, an oil return channel is retained between the longer side of the strengthening boss and the face window, and simultaneously the thickness of the strengthening boss does not exceed the maximum diameter of the piston. Compare the oil return structure and the oil return structure, see figure 1, in the prior art, the strengthening boss is arranged at the cross position of the pin hole and the face window, the strength at the cross position of the pin hole and the face window is effectively improved, and breakage of the pin hole is further reduced. Oil return width is retained between the longer side of the strengthening boss and the face window to guarantee reasonable oil return. Compare the oil return structure and the oil return structure, see figure 2, in the prior art, the weight of the piston is effectively reduced.

Description

A kind of piston

Technical field

The utility model relates to technical field of engines, more particularly, relates to a kind of piston.

Background technique

Along with the situation of energy issue of world is severe day by day, engine power density improves day by day, and structure is compact day by day, and the specific pressure that piston bears also progressively improves.The oil return structure of piston is also showed difference fully, and is as shown in Figure 1 in the existing technology, and a kind of removing a part of material carries out oil return on every side at pin-and-hole 1.Of Fig. 2, the another kind of method of removing material that adopts in pin-and-hole 1 both sides is offered oil-return groove 3, and oil-return groove 3 is not communicated with pin-and-hole 1.Though these two kinds of oil return structures that piston adopts can guarantee reasonable oil return; But, oil return structure as shown in Figure 1, the thickness between circlip groove and pin-and-hole 1 face-port 2 zones is too small; When wrist pin is worked because its play; Cause pin-and-hole 1 phenomenon of rupture to occur easily, oil return structure as shown in Figure 2, the material surplus too much causes piston weight to increase between oil-return groove 3 and the pin-and-hole 1.

In sum, how a kind of piston being provided, improving the intensity of pin-and-hole 1 and face-port 2 intersections effectively, and then reduce the generation of pin-and-hole 1 phenomenon of rupture, is present those skilled in the art's problem demanding prompt solution.

The model utility content

In view of this, the purpose of the utility model is to provide a kind of piston, improves the intensity of pin-and-hole and face-port intersection effectively, and then reduces the generation of pin-and-hole phenomenon of rupture.

For realizing above-mentioned purpose, the utility model provides following technological scheme:

A kind of piston; Comprise pin-and-hole, circlip groove and face-port; Also comprise the oil return structure, said oil return structure comprises the reinforcement boss, and said reinforcement boss is arranged on said pin-and-hole and said face-port intersection; And leave drainback passage between the longer sides of said reinforcement boss and the said face-port limit, the thickness of said reinforcement boss does not exceed said piston maximum diameter simultaneously.

Preferably, minimum wall thickness (MINI W.) is 2.0mm-2.5mm between said face-port and the said circlip groove.

Preferably, said oil return width is 5mm-8mm.

A kind of piston that the utility model provides; Comprise pin-and-hole, circlip groove and face-port; Also comprise the oil return structure, said oil return structure comprises the reinforcement boss, and said reinforcement boss is arranged on said pin-and-hole and said face-port intersection; And leave drainback passage between the longer sides of said reinforcement boss and the said face-port limit, the thickness of said reinforcement boss does not exceed said piston maximum diameter simultaneously.The difference of comparing because of oil return structure in said oil return structure and the existing technology is as shown in Figure 1 is; Said oil return structure is provided with said reinforcement boss at said pin-and-hole and said face-port intersection; Effectively improved the intensity of said pin-and-hole and said face-port intersection, and then reduced said pin-and-hole phenomenon of rupture and take place.The oil return width that leaves between the longer sides of said reinforcement boss and the said face-port limit can guarantee reasonable oil return.And the oil return structure weight that has reduced said piston effectively of comparing as shown in Figure 2 in described oil return structure and the existing technology.

Description of drawings

In order to be illustrated more clearly in the utility model embodiment or technological scheme of the prior art; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing in describing below only is some embodiments of the utility model, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.

Fig. 1 is a kind of piston oil return structural representation in the existing technology;

Fig. 2 is an another kind of piston oil return structural representation in the existing technology;

Fig. 3 is a piston oil return structural representation among the utility model embodiment.

Wherein, among Fig. 1-Fig. 3:

1 pin-and-hole, 2 face-ports, 3 oil-return grooves, 4 are strengthened boss.

Embodiment

The utility model provides a kind of piston, improves the intensity of pin-and-hole 1 and face-port 2 intersections effectively, and then reduces the generation of pin-and-hole 1 phenomenon of rupture.

To combine the accompanying drawing among the utility model embodiment below, the technological scheme among the utility model embodiment is carried out clear, intactly description, obviously, described embodiment only is a part of embodiment of the utility model, rather than whole embodiments.Based on getting embodiment in the utility model, those of ordinary skills belong to the utility model protection domain not making all other embodiments that obtained under the creative work prerequisite.

Please refer to accompanying drawing 3, Fig. 3 is a piston oil return structural representation among the utility model embodiment.

The piston that the utility model provides comprises pin-and-hole 1, circlip groove (not shown) and face-port 2; Also comprise the oil return structure; The oil return structure comprises strengthens boss 4; Strengthen boss 4 and be arranged on pin-and-hole 1 and face-port 2 intersections, and leave drainback passage between the longer sides of reinforcement boss 4 and face-port 2 limits, the thickness of strengthening boss 4 does not simultaneously exceed the piston maximum diameter.

The difference of comparing because of oil return structure in oil return structure and the existing technology is as shown in Figure 1 is that the oil return structure is provided with face-port 2 intersections at pin-and-hole 1 strengthens boss 4, has effectively improved the intensity of pin-and-hole 1 with face-port 2 intersections, and then reduces pin-and-hole 1 phenomenon of rupture and take place.The oil return width that leaves between the longer sides of reinforcement boss 4 and face-port 2 limits can guarantee reasonable oil return.And the oil return structure weight that has reduced piston effectively of comparing as shown in Figure 2 in oil return structure and the existing technology.

Wherein, Above-mentioned reinforcement boss 4 is provided with for the intensity that improves above-mentioned pin-and-hole 1 and above-mentioned face-port 2 intersections; Can be provided with in above-mentioned pin-and-hole 1 and above-mentioned face-port 2 intersections all positions and should strengthen boss 4; Also can should strengthen boss 4 in above-mentioned pin-and-hole 1 and above-mentioned face-port 2 intersections local location settings, the shape of this reinforcement boss 4 can be other shapes such as shape that auricle shape, opposite side are parallel to each other.Preferentially select the above-mentioned reinforcement boss of auricle shape among the utility model embodiment for use.

Concrete, at above-mentioned pin-and-hole 1 and above-mentioned face-port 2 intersection's local locations, this reinforcement boss 4 of two auricle shapes is set evenly.

Wherein, in order to guarantee the reasonable oil return of above-mentioned piston, between above-mentioned reinforcement boss 4 longer sides and above-mentioned face-port 2 limits, leave drainback passage, this drainback passage is 5mm-8mm.

Wherein, in order to guarantee above-mentioned piston proper functioning, the thickness of above-mentioned reinforcement boss 4 can not exceed the maximum diameter of this piston.

Wherein, in order to guarantee above-mentioned piston intensity, minimum wall thickness (MINI W.) is 2.0mm-2.5mm between above-mentioned circlip groove and the above-mentioned face-port 2.

To the above-mentioned explanation of the disclosed embodiments, make related domain professional and technical personnel can realize or use the utility model.Multiple modification to these embodiments will be conspicuous concerning those skilled in the art, and defined General Principle can realize under the situation of spirit that does not break away from the utility model or scope in other embodiments among this paper.Therefore, the utility model will can not be restricted to these embodiments shown in this paper, but will meet and principle disclosed herein and features of novelty the wideest corresponding to scope.

Claims

1. piston; Comprise pin-and-hole (1), circlip groove and face-port (2), it is characterized in that, also comprise the oil return structure; Said oil return structure comprises strengthens boss (4); Said reinforcement boss (4) is arranged on said pin-and-hole (1) and said face-port (2) intersection, and leaves drainback passage between the longer sides of said reinforcement boss (4) and said face-port (2) limit, and the thickness of said reinforcement boss (4) does not exceed said piston maximum diameter simultaneously.

2. piston according to claim 1 is characterized in that, minimum wall thickness (MINI W.) is 2.0mm-2.5mm between said face-port (2) and the said circlip groove.

3. piston according to claim 1 is characterized in that, said drainback passage is 5mm-8mm.