CN202040192U

CN202040192U - Connecting rod of engine

Info

Publication number: CN202040192U
Application number: CN2010206966499U
Authority: CN
Inventors: 罗珒; 黄鹏华; 王磊
Original assignee: SAIC GM Wuling Automobile Co Ltd
Current assignee: SAIC GM Wuling Automobile Co Ltd
Priority date: 2010-12-31
Filing date: 2010-12-31
Publication date: 2011-11-16
Anticipated expiration: 2020-12-31

Abstract

The utility model provides a connecting rod of an engine. The connecting rod comprises a connecting rod body (1) and a copper bushing (2). The connecting rod body (1) comprises a small head part (11), a rod body (13) and a big head part (12); a small head hole (111) is arranged on the small head part (11), and the copper bushing (2) is embedded into the small head hole (111); the rod body (13) is a structure body without an oil through hole; and the big head part (12) is a structure body without an oil hole. The connecting rod of the engine has the beneficial effects that the bearing capacity of the small head part is improved, and the friction between a connecting rod hole and a piston pin is reduced and improved; as no oil hole does not need to be arranged on the connecting rod or the big head part, the strength and the bearing capacity of the connecting rod and a bearing bush of the connecting rod are improved, and the design of a connecting rod main body or the big head part is simplified; when the copper bushing is worn, the copper bushing rather than the whole connecting rod can be replaced directly, therefore, the maintenance cost of the engine is effectively reduced.

Description

A kind of engine link

[technical field]

The utility model relates to the engine design field, relates in particular to a kind of engine link.

[background technique]

Connecting rod is made up of little head end, shaft and stub end three parts, and its effect is that the gas pressure that piston bears is passed to bent axle, and makes the to-and-fro motion of piston change rotatablely moving of bent axle into, with external output power.Motor is in running, piston linear reciprocating motion, the crankshaft rotating motion is in link motion state more complicated between the two, bear alternate loads such as compression, stretching, bending, therefore requiring connecting rod under the as far as possible little situation of quality, enough strength and stiffness must be arranged.

Connecting rod running up in engine operation process makes the friction problem of connecting rod small end hole and wrist pin and piston skirt and cylinder surface serious, therefore the bearing capacity of little head is low, so and higher because need change whole connecting rod engine maintenance cost during the wearing and tearing of microcephaly hole; In addition because serious friction problem, microcephaly portion needs lubrication assistant, therefore a lot of connecting rods can be held one or more connecting rod oilholes in enlarged head and carry out the little head of splash lubrication, or at through hole of shaft brill the lubricant oil in the crankshaft oil hole are delivered to microcephaly portion place's cooling and lubricating wrist pin.But at shaft or enlarged head oilhole is set, the oilhole place can form stress and concentrate, and can the intensity of connecting rod be made a big impact, reduce its bearing capacity, and if improve the connecting rod strength of its band oilhole, need strengthen design to connecting rod, cause connecting rod weight to increase.

[model utility content]

Microcephaly portion bearing capacity is low, the engine maintenance cost is higher and need design the problem that oilhole comes the little head of lubrication assistant at shaft or enlarged head in order to solve, the utility model provides a kind of engine link, it is by being embedded in the friction that copper sheathing increases the bearing capacity of little head and reduces microcephaly hole and wrist pin in the microcephaly hole, thereby can cancel the oilhole on enlarged head or the shaft, improve the bearing capacity of connecting rod.

Engine link in the utility model comprises con-rod only, and con-rod only comprises little head, shaft and enlarged head; Engine link also comprises copper sheathing; Little head is provided with the microcephaly hole, and copper sheathing is arrived in the microcephaly hole by setting-in; Shaft is the structure that oil through is not set; Enlarged head is the structure that oilhole is not set.

Further improvement of the utility model is: little head comprises two parallel hole end surfaces; The both sides that are parallel to hole end surface on the shaft have groove.

Further improvement of the utility model is: groove is set makes described shaft have the I shape cross section.

The utility model has been installed copper sheathing in the microcephaly hole on little head, with respect to prior art, the beneficial effects of the utility model are: because copper sheathing has fabulous seizure resistance, compliance, embeddability and running-in ability, the bearing capacity of little head is improved; And the characteristic of copper sheathing makes that the friction between connecting rod small end hole and the wrist pin is reduced, improves, the machine oil that splashes to cylinder hole and little head when therefore crankshaft crank turns round just can guarantee the sufficient lubrication of little head, need not at shaft or enlarged head oilhole to be set again, thereby the intensity and the bearing capacity of connecting rod and connecting rod bearing shell are improved, and the design of shaft or enlarged head simultaneously obtains simplifying; When copper sheathing weares and teares, can directly change copper sheathing, but not change whole connecting rod, so the utility model has reduced the maintenance cost of motor effectively; The utility model carries out attenuate according to the connecting rod stress distribution to shaft in addition, integral stem is as sleeve configuration, shaft is designed to simplify structural I-beam, this structure can alleviate connecting rod quality effectively when guaranteeing connecting rod rigidity and intensity, satisfy the light-weighted designing requirement of motor, improved external output power.

[description of drawings]

Fig. 1 is the structure front view of the utility model engine link;

Fig. 2 is the structure left view of the utility model engine link;

Fig. 3 is the structure side view of the utility model engine link;

Fig. 4 is the schematic cross-section of the A-A section of the utility model engine link.

[embodiment]

Below in conjunction with description of drawings and embodiment the utility model is further specified.

As shown in Figure 1 to Figure 3, engine link comprises con-rod only 1, and con-rod only comprises microcephaly portion 11, shaft 13 and enlarged head 12; Engine link in the utility model also comprises copper sheathing 2, and this copper sheathing 2 is arrived in the microcephaly hole 111 of microcephaly portion 11 by setting-in.Because copper sheathing 2 has fabulous seizure resistance, compliance, embeddability and running-in ability, thus setting-in the bearing capacity of microcephaly portion 11 of copper sheathing 2 be improved, and the friction between connecting rod small end hole 111 and the wrist pin can be reduced, be improved; In addition when copper sheathing 2 wearing and tearing, can directly change copper sheathing 2 but not change whole connecting rod, so be embedded in the maintenance cost that copper sheathing 2 has reduced motor effectively in microcephaly hole 111.

The characteristic of copper sheathing makes the friction between connecting rod small end hole 111 and the wrist pin be reduced, improve, the machine oil that splashes to cylinder hole and microcephaly portion 11 when therefore crankshaft crank turns round just can guarantee the sufficient lubrication of microcephaly portion 11, need not on shaft 13 or enlarged head 12, oilhole to be set again, so shaft 13 is structures that oil through is not set; Enlarged head 12 is structures that oilhole is not set.And the oilhole on cancellation shaft 13 or the enlarged head 12, both having guaranteed that the metal streamline of con-rod only 1 is perfect falls into, reduced effectively again connecting rod and connecting rod bearing shell stress raisers, improved the bearing capacity of connecting rod and connecting rod bearing shell, also simplified the design of shaft 13 or enlarged head 12.

Because the light-weight design of connecting rod will help improving its external output power, so the shaft 13 in the utility model adopts the design of simplifying structural I-beam, this structure can alleviate connecting rod quality effectively when guaranteeing connecting rod rigidity and intensity in addition; The utility model also carries out attenuate according to the connecting rod stress distribution to shaft 13, makes integral stem as sleeve configuration.In order to reach the light-weight design of connecting rod, the technical solution adopted in the utility model is: the both sides that are parallel to the hole end surface 112 (hole end surface of this little head has two and parallel to each other) of microcephaly portion 11 on shaft 13 are provided with groove 131, the groove that is provided with makes shaft have the cross section of I shape, as shown in Figure 3 and Figure 4.

Above content be in conjunction with concrete preferred implementation to further describing that the utility model is done, 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, under the prerequisite that does not break away from the utility model design, can also make some simple deduction or replace, all should be considered as belonging to protection domain of the present utility model.

Claims

1. an engine link comprises con-rod only (1), and described con-rod only (1) comprises little head (11), shaft (13) and enlarged head (12); It is characterized in that: described engine link also comprises copper sheathing (2); Described little head (11) is provided with microcephaly hole (111), and described copper sheathing (2) is arrived in the described microcephaly hole (111) by setting-in; Described shaft (13) is the structure that oil through is not set; Described enlarged head (12) is the structure that oilhole is not set.

2. engine link according to claim 1 is characterized in that: described little head (11) comprises two parallel hole end surfaces (112); The both sides that are parallel to described hole end surface (112) on the described shaft (13) have groove (131).

3. engine link according to claim 2 is characterized in that: described groove (131) is set makes described shaft (13) have the I shape cross section.