CN202158069U - Engine cracking connection rod connected by four bi-hexagonal head bolts - Google Patents

Abstract

The utility model provides an engine cracking connection rod connected by four bi-hexagonal head bolts. The connection rod comprises a connection rod body, a large head hole and a small head hole at two ends of the connection rod body, a pre-crack on the large head hole, and a connecting bolt for a large head end cover and the connection rod body after cracking; and after cracking, the connecting bolt for the large head end cover and the connection rod body is connected by the four bi-hexagonal head bolts, and two bi-hexagonal head bolts are arranged in parallel along axial direction at either of two sides of the large head end cover. An oil duct hole passing through the connection rod body in longitudinal direction is communicated from the inner wall of the large head hole to the inner wall of the small head hole, and the inner wall of the small head hole is provided with a V-shaped lubricating groove running through longitudinal direction. A laser cracking groove is arranged at the pre-crack of the large head hole, the small head hole is internally provided with a lining that is matched with and embedded in the small head hole, the V-shaped lubricating oil groove is on the lining, and the lining is provided with an outlet of the oil duct hole. The lining has a U-shaped hasp connecting structure. For the connection rod, the four bi-hexagonal head bolts are used for screwing so that the combination of the large head hole cracking surface is stable, the step at the crack of the large head hole wall is lowered and the circular degree of the large head hole is raised.

Description

The bihexagonal head four bolted motors disconnection bar that rises

Technical field

The utility model belongs to technical field of automobile engine, is specifically related to a kind of bihexagonal head four bolted motors disconnection bar that rises.

Background technique

The rise big end hole of disconnection bar of motor is connected with crank-shaft link neck, and the microcephaly hole is connected with wrist pin.The effect of connecting rod is to give bent axle the propagation of pressure from wrist pin, drives crankshaft rotating, and then realizes the power output of motor, is the requisite vital part of combustion engine powered assembly.

The big end hole of connecting rod is designed with the fractional fissure that rises, so that open when installing.But; The disconnected process that rises can produce the underproof problem of face absolutely that rises; Rise and have no progeny; The major part end cap is not ideal enough with being connected of connecting rod shank, exists the big end hole section that rises to combine unstable, big end hole hole wall cracks to have slight crack to influence problems such as smoothness, the motor problem that the disconnection bar up-to-standard rate of disconnection bar also exists that rises.The situation of killing often appears in rise microcephaly hole and the wrist pin of disconnection bar of motor, mainly is unlubricated causing between microcephaly hole and the wrist pin.

Summary of the invention

The purpose of the utility model is in order to solve the major part end cap and to stablize, reduce the risk that connecting rod small end hole and wrist pin are killed being connected of connecting rod shank; It is lubricated to improve connecting rod small end; Improve the disconnection bar up-to-standard rate that rises, design a kind of bihexagonal head four bolted motors disconnection bar that rises.

The technological scheme that the utility model adopted is following:

The bihexagonal head four bolted motors of the utility model disconnection bar that rises comprises the big end hole and the microcephaly hole at the connecting rod body of rod, connecting rod body of rod two ends; Precrack on big end hole; The connecting bolt of the major part end cap and the connecting rod body of rod of having no progeny rises; It has no progeny connecting bolt of major part end cap and connecting rod body of rod side of rising adopts four bihexagonal head screws to be connected, in the both sides of major part end cap, two bihexagonal head screws of every side along car by to being arranged side by side.

The described bihexagonal head four bolted motors disconnection bar that rises is communicated with an oil channel hole that vertically runs through the connecting rod body of rod by big end hole inwall to microcephaly hole inwall, and inwall is established the V-type lubrication groove that runs through axial in the microcephaly hole.

The described bihexagonal head four bolted motors disconnection bar that rises is established on the end face at the precrack place of big end hole along the laser of the precrack disconnected groove that rises.

The described bihexagonal head four bolted motors disconnection bar that rises, the lining of in the microcephaly hole, establishing with microcephaly hole coupling is embedded in the microcephaly hole, and the V-type oil groove has the outlet of oil channel hole on the lining on lining.

Described lining is a U-shaped hasp linkage structure, on one side promptly lining bends the joint by sheet metal the U-shaped notch is arranged, another side has the U-shaped hasp of coupling, and described joint is connected by U-shaped notch and U-shaped hasp.

The advantage of the utility model is following:

1) the major part end cap of the utility model adopts four bihexagonal head screws and the connecting rod body of rod to tighten, and makes the big end hole section that rises combine stablely, reduces the step of big end hole hole wall cracks, the circularity of raising big end hole.

2) engine link that relates to of the utility model; Under the enough situation of connecting rod Fatigue Strength Analysis; Increase an oil channel hole that runs through from crank pin end pore to microcephaly hole, transfer to crank pin end pore to the machine oil from the motor main oil gallery through last oil channel hole, the mode through pressure lubrication transfers to the connecting rod small end hole to machine oil from crank pin end pore again; And stay in the V-type lubrication groove; Improve the lubricated of connecting rod small end hole, thereby reached the purpose of lube pistons pin, reduced the risk that connecting rod small end hole and wrist pin are killed.

3) establish the laser disconnected groove that rises at the precrack place of big end hole, making rises, and the rise when disconnected quality of section is guaranteed, and has improved the disconnection bar up-to-standard rate that rises.

4) in the microcephaly hole, establish lining, lining adopts Cu alloy material to make, and has superior plasticity and toughness, and the bite-resistant performance that makes it when being connected with wrist pin improves greatly.

5) through finite element analysis and series calculation, virtual assembling is connected analysis etc. all to be passed through with interference checking, structural stress analysis, bolt, thinks feasible.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Fig. 2 is the longitudinal sectional view of the utility model.

Fig. 3 is the structural representation of the lining of the utility model.

Specific embodiments

Below in conjunction with embodiment the utility model is further described.

Like Fig. 1, Fig. 2: the bihexagonal head four bolted motors of the utility model disconnection bar that rises comprises the big end hole 2 and the microcephaly hole 3 at the connecting rod body of rod 1, the connecting rod body of rod 1 two ends; Precrack 6 on big end hole 2; The major part end cap 2a that has no progeny and the connecting bolt 5 of connecting rod body of rod side rise; It is characterized in that: the major part end cap 2a that has no progeny that rises adopts four bihexagonal head screws to be connected with the connecting bolt 5 of the connecting rod body of rod 1; In the both sides of major part end cap 2a, two bihexagonal head screws of every side are arranged side by side vertically.Adopt four bihexagonal head screws and the connecting rod body of rod to tighten, make the big end hole section that rises combine stablely, big end hole hole wall cracks smoothness improves.

Be communicated with an oil channel hole 4 that vertically runs through the connecting rod body of rod 1 by big end hole 2 inwalls to microcephaly hole 3 inwalls; 3 inwalls are established the V-type lubrication groove 7 that runs through axial in the microcephaly hole; Transfer to crank pin end pore 2 to the machine oil from the motor main oil gallery through last oil channel hole, the mode through pressure lubrication transfers to connecting rod small end hole 3 to machine oil from crank pin end pore 2 through oil channel hole 4 again; And stay in the V-type lubrication groove 7; Improve the lubricated of connecting rod small end hole 3, thereby reached the purpose of lube pistons pin, reduced the risk that connecting rod small end hole and wrist pin are killed.

On the end face at precrack 6 places of big end hole 2, establish along the laser of the precrack 6 disconnected groove 8 that rises, making rises, and the rise when disconnected quality of section is guaranteed, and has improved the disconnection bar up-to-standard rate that rises.

Like Fig. 1, Fig. 2, Fig. 3: the lining 3a that in microcephaly hole 3, establishes with microcephaly hole 3 couplings is embedded in the microcephaly hole 3, and V-type oil groove 7 has the outlet 4a of oil channel hole 4 on the lining 3a on lining 3a.Lining adopts Cu alloy material to make, and has superior plasticity and toughness, and the anti-meshing performance that makes it when being connected with wrist pin improves greatly.Described lining 3a is a U-shaped hasp linkage structure, and 3a1 is a hasp.Because lining 3a is bent by sheet metal and forms, on one side there is the U-shaped notch joint, another side has the U-shaped hasp of coupling, and U-shaped notch and U-shaped hasp are connected.

Claims (5)

1. bihexagonal head four bolted motors disconnection bar that rises; The big end hole (2) and microcephaly hole (3) that comprise the connecting rod body of rod (1), the connecting rod body of rod (1) two ends; Precrack (6) on big end hole (2); It is characterized in that: the rise major part end cap (2a) of having no progeny of big end hole (2) adopts four bihexagonal head screws to be connected with the connecting bolt (5) of the connecting rod body of rod (1) side, and in the both sides of major part end cap (2a), two bihexagonal head screws of every side are arranged side by side vertically.

2. the bihexagonal head four bolted motors according to claim 1 disconnection bar that rises; It is characterized in that: be communicated with an oil channel hole (4) that vertically runs through the connecting rod body of rod (1) by big end hole (2) inwall to microcephaly hole (3) inwall, inwall is established the V-type lubrication groove (7) that runs through axial in microcephaly hole (3).

3. the bihexagonal head four bolted motors according to claim 1 and 2 disconnection bar that rises is characterized in that: on the end face that the precrack (6) of big end hole (2) is located, establish along the laser of precrack (6) the disconnected groove (8) that rises.

4. bihexagonal head four bolted engine links according to claim 1 and 2; It is characterized in that: in microcephaly hole (3), establish the lining (3a) that matees with microcephaly hole (3) and be embedded in the microcephaly hole (3); V-type oil groove (7) has the outlet (4a) of oil channel hole (4) on the lining (3a) on lining (3a).

5. bihexagonal head four bolted engine links according to claim 4; It is characterized in that: described lining (3a) is U-shaped hasp (3a1) linkage structure; Be that lining (3a) has the U-shaped notch by one side that sheet metal bends the joint; Another side has the U-shaped hasp of coupling, and described joint is connected by U-shaped notch and U-shaped hasp.

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