CN211260311U - Crankshaft direct-drive variable-flow oil pump and synchronous chain cover shell assembly - Google Patents

Abstract

A crankshaft direct-drive variable-flow oil pump and synchronous chain cover shell assembly relates to an automobile accessory. The oil pump assembly shell is arranged on the synchronous chain housing shell to form an oil cavity, an inner rotor and an outer rotor are arranged in the oil cavity, the outer rotor is fixed with the oil pump assembly shell and is internally meshed with the inner rotor, the inner rotor is coaxially fixed with the crankshaft, an oil inlet of the oil cavity is communicated with an oil absorption channel, an oil discharge port of the oil cavity is communicated with an oil inlet of a main oil duct, the main oil duct is communicated with a pressure relief pump, and a first group of pressure relief holes and a second group of pressure relief holes penetrating through the wall thickness of the pressure relief. The utility model discloses arrange variable flow oil pump assembly at the engine front end, integrated with synchronous chain cover shell, through bent axle direct drive inner rotor, can high-efficiently utilize the engine space, be favorable to the compact of engine to arrange and oil pump platformization. In addition, the resistance of an oil outlet is reduced by outputting engine oil with different flow rates, the power consumption of the engine is reduced, and the oil consumption condition is improved.

Description

Crankshaft direct-drive variable-flow oil pump and synchronous chain cover shell assembly

Technical Field

The utility model relates to an auto-parts, especially a bent axle directly drives variable flow oil pump and synchronous chain cover shell assembly.

Background

At present, most variable flow oil pumps are arranged in a crankcase where an oil pan of an engine is located, and are driven by a crankshaft or a balance shaft through gears or chains, so that the oil pumps occupy large space, and are not beneficial to compact arrangement of the engine and oil pump platformization. In addition, most engine oil pumps are constant-flow oil pumps currently, and the oil pumps can deliver a certain amount of oil to a main oil duct when the rotor does work. When the rotating speed of the engine rises, the oil pumping amount is increased, and then the pressure of the main oil gallery is increased, so that the oil discharging resistance of the oil pump is increased. However, the surfaces of all friction pairs of the engine do not need to convey excessive engine oil, the flow of the engine oil pump is only related to the rotating speed, the flow is increased along with the rotating speed, and the resistance of an oil outlet is increased along with the increase of the flow. This undoubtedly adds excessive load to the engine, which causes excessive crankshaft resistance and increased fuel consumption.

SUMMERY OF THE UTILITY MODEL

For solving the problem that exists among the background art, the utility model provides a bent axle directly drives variable flow oil pump and synchronous chain cover shell assembly.

The purpose is achieved, the utility model adopts the following technical proposal: a crankshaft direct-drive variable-flow oil pump and synchronous chain cover shell assembly comprises an oil pump assembly and a synchronous chain cover shell; the oil pump assembly comprises an inner rotor, a plunger, an outer rotor, a spring, an oil suction duct, a pressure relief pump, a main oil duct and a shell, wherein the shell of the oil pump assembly is detachably and fixedly arranged on the shell of the synchronous chain cover shell and forms an oil cavity; the oil pump is characterized in that an inner rotor and an outer rotor are arranged in the oil cavity, the outer rotor is fixedly connected with a shell of the oil pump assembly and is in inner engagement with the inner rotor, the inner rotor is fixedly connected with the crankshaft in a coaxial mode, an oil inlet of the oil cavity is communicated with the oil absorption channel, an oil discharge port of the oil cavity is communicated with an oil inlet of the main oil duct, the main oil duct is communicated with the pressure relief pump, and a first group of pressure relief holes and a second group of pressure relief holes penetrating through the wall thickness of the pressure relief pump are.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model discloses compact structure, reasonable in design arranges variable flow oil pump assembly at the engine front end, and is integrated with synchronous chain cover shell, through bent axle direct drive inner rotor, can high-efficiently utilize the engine space, is favorable to the compact of engine to be arranged and oil pump platformization. In addition, the resistance of an oil outlet is reduced by outputting engine oil with different flow rates, the power consumption of the engine is reduced, and the oil consumption condition is improved.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is a schematic diagram of the overall structure of the oil pump assembly.

Detailed Description

The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiments of the present invention, rather than all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative work belong to the protection scope of the present invention based on the embodiments of the present invention.

The first embodiment is as follows: as shown in fig. 1-2, the utility model discloses a crankshaft direct-drive variable-flow oil pump and synchronous chain cover shell assembly, which comprises an oil pump assembly 1 and a synchronous chain cover shell 2; the oil pump assembly 1 comprises an inner rotor 5, a plunger 7, an outer rotor 8, a spring 9, an oil suction channel 10, a pressure relief pump 11, a main oil channel 13 and a shell 15, wherein the shell 15 of the oil pump assembly 1 is detachably and fixedly arranged on the shell of the synchronous chain housing 2 through bolts, so that the axial size space of an engine is reduced, the applicability of the engine matching with a whole vehicle is wider, and an oil cavity 12 is formed; the oil pump is characterized in that an inner rotor 5 and an outer rotor 8 are arranged in the oil cavity 12, the outer rotor 8 is fixedly connected with a shell 15 of the oil pump assembly 1 and is in inner engagement with the inner rotor 5, the inner rotor 5 is fixedly connected with a crankshaft in a coaxial mode, an oil inlet of the oil cavity 12 is communicated with the oil absorption channel 10, an oil discharge port of the oil cavity 12 is communicated with an oil inlet of the main oil duct 13, the main oil duct 13 is communicated with the pressure relief pump 11, and a first group of pressure relief holes 3 and a second group of pressure relief holes 4 penetrating through the wall thickness of the pressure relief pump 11 are.

The second embodiment is as follows: as shown in fig. 2, this embodiment is further explained for the first embodiment, the inner bottom surface of the pressure relief pump 11 is connected to a vertically arranged plunger 7 through a spring 9, and the plunger 7 is arranged adjacent to the main oil gallery 13.

The utility model discloses the during operation, inner rotor 5 drives rotatoryly through the main shaft, opens with 8 meshes of outer rotor and can produce the negative pressure, inhales machine oil from oil absorption opening 14 of oil absorption way 10, discharges from oil drain 6 of main oil duct 13. When the rotating speed of the inner rotor 5 rises, the pressure of the oil outlet 6 rises, the plunger 7 moves downwards against the spring force of the spring 9, so that the engine oil is discharged from the first group of pressure relief holes 3, and the output flow of the engine oil pump assembly 1 is reduced at the moment. When the rotating speed of the inner rotor 5 continues to rise and the pressure continues to rise, the plunger 7 continues to move downwards, so that the engine oil is discharged from the second group of pressure relief holes 4, and the output flow of the engine oil pump assembly 1 continues to decrease at the moment. The process is variable flow control output by the oil pump assembly 1, so that two-stage variable flow control of the oil pump assembly 1 is realized. The plunger 7 is pushed to move by the pressure change of the oil outlet 6, so that the oil drainage pressure is divided into two sections, and different amounts of engine oil are drained, thereby regulating the flow of the engine oil pump assembly 1 and realizing mechanical self-regulation type variable flow control.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other forms of embodiment without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (2)

1. The utility model provides a variable flow oil pump and synchronous chain cover shell assembly are directly driven to bent axle which characterized in that: the oil pump assembly comprises an oil pump assembly (1) and a synchronous chain cover (2); the oil pump assembly (1) comprises an inner rotor (5), a plunger (7), an outer rotor (8), a spring (9), an oil suction channel (10), a pressure relief pump (11), a main oil channel (13) and a shell (15), wherein the shell (15) of the oil pump assembly (1) is detachably and fixedly arranged on the shell of the synchronous chain cover (2) to form an oil cavity (12); be equipped with inner rotor (5) and outer rotor (8) in oil pocket (12), outer rotor (8) and casing (15) fixed connection of oil pump assembly (1) and inner rotor (5) inner gearing are connected, inner rotor (5) and the coaxial fixed connection of bent axle, the oil inlet and the oil suction duct (10) intercommunication setting of oil pocket (12), the oil drain port of oil pocket (12) and the oil inlet intercommunication setting of main oil duct (13), main oil duct (13) and pressure release pump (11) intercommunication setting, the lateral wall of pressure release pump (11) is equipped with first group pressure release hole (3) and the second group pressure release hole (4) that run through its wall thickness from top to bottom.

2. The crankshaft direct-drive variable flow oil pump and synchronous chain cover shell assembly as claimed in claim 1, wherein: the inner bottom surface of the pressure relief pump (11) is connected with a vertically arranged plunger (7) through a spring (9), and the plunger (7) is arranged close to the main oil duct (13).

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