Crankshaft for range extender of direct-drive oil pump

Abstract

The utility model relates to a crankshaft for a range extender of a direct-drive oil pump. The crankshaft comprises a crankshaft body, the crankshaft body is composed of a rear end shaft, a crank, a balance weight, a crankshaft journal, a connecting rod journal and a front end shaft, a transmission section is coaxially arranged on the front end shaft, an oil pump is connected to the transmission section in a transmission mode, a pump shell and an inner rotor are arranged outside the oil pump, the inner rotor is assembled on the pump shell in a rotating mode, and the inner rotor is assembled on the pump shell in a rotating mode. The pump shell is fixedly installed on the inner side wall of the timing cover cap, and an installation hole in transmission connection with the transmission section is formed in the inner rotor, so that coaxial transmission connection between the inner rotor and the transmission section is achieved. According to the utility model, the inner rotor on the oil pump and the transmission section on the crankshaft body are directly and coaxially inserted to realize direct driving, so that a more efficient transmission mode and a simpler transmission structure are realized, the overall simplification of an engine structure is facilitated, the production cost is reduced, and the production efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of engine crankshafts, in particular to a kind of crankshafts for range extender of direct drive oil pump. BACKGROUND

[0002] The core role of oil pump in automobile engine is to establish lubrication system pressure. Through the rotation of gear or rotor mechanism, the oil pump sucks the oil in the oil sump and pressurizes it, and forcibly delivers it to the surface of each friction component of the engine to form an oil film, ensuring that key components such as the crankshaft, camshaft, and piston receive stable lubrication, heat dissipation, and cleaning functions. The oil pump itself has a pressure regulating valve that automatically adjusts the system oil pressure. When the pressure is too high, it releases pressure to ensure stable operation of the lubrication system.

[0003] The power source of the oil pump is usually driven by the crankshaft or camshaft of the engine, specifically through the following transmission methods: the driving gear is engaged with the crankshaft / camshaft gear, commonly used in externally meshing gear pumps; some designs use a chain or belt to connect the crankshaft and the oil pump transmission. Both of the above transmission methods require the addition of transmission components, which is not conducive to reducing the overall structure of the engine, especially for range extender engines. In order to make the range extender more compact, it is necessary to further simplify the transmission method of the oil pump. SUMMARY

[0004] The utility model provides a kind of crankshafts for range extender of direct drive oil pump;Solve the problem that the transmission method of oil pump in prior art is not enough simplified.

[0005] The above technical problems of the utility model are mainly solved by the following technical scheme: a kind of crankshafts for range extender of direct drive oil pump, including crankshaft body, the crankshaft body is by rear end shaft, crank, counterweight, crankshaft journal, connecting rod journal and front end shaft, transmission section is coaxially provided on the front end shaft, oil pump is drivingly connected on the transmission section, the outer portion of the oil pump is equipped with pump shell and inner rotor, the inner rotor is rotatably assembled on the pump shell, the pump shell is fixedly installed on the inner side wall of timing cover, the inner rotor is equipped with mounting hole that is drivingly connected with the transmission section, so that the inner rotor and the transmission section are coaxially drivingly connected.

[0006] The installation mode of the utility model is that the crankshaft body is installed into the engine cylinder body first, the rear end shaft is used for connecting the flywheel, the crankshaft journal is in rotary cooperation with the engine cylinder body, the connecting rod journal is in rotary cooperation with the piston connecting rod, and the balance shaft driving gear and the timing sprocket can be installed on the front end shaft; the pump shell of the oil pump is fixed and installed on the inner side wall of the timing cover first, then the timing cover is integrally installed on one side of the engine, the installation hole on the inner rotor is directly inserted with the transmission section during the installation process, and then the timing cover is completely fixed.

[0007] Therefore, compared with the prior art, the utility model has the following characteristics: 1. the inner rotor on the oil pump and the transmission section on the crankshaft body are directly coaxially inserted to realize direct driving, thereby realizing more efficient transmission mode and more simplified transmission structure, which is helpful to the overall simplification of the engine structure, also helps to reduce the production cost and improve the production efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0008] ATTACHED Figure 1 It is a structural schematic view of the utility model;

[0009] ATTACHED Figure 2 It is a structural schematic view of the utility model when being fixed with the timing cover;

[0010] ATTACHED Figure 3 It is a disassembly view of the utility model. DETAILED DESCRIPTION

[0011] The technical scheme of the utility model will be further specifically described below by combining with the drawings.

[0012] In the description of the utility model, it should be understood that the orientation or position relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0013] Example 1: see Figure 1 , Figure 2 and Figure 3The application discloses a crankshaft for a range extender of a direct-drive engine oil pump, which comprises a crankshaft body 100, wherein the crankshaft body is composed of a rear end shaft 110, four cranks 120, four balance weights 130, three crank shaft journals 140, two connecting rod journals 150 and a front end shaft 160, the front end shaft is divided into a gear mounting section 161 and a sprocket mounting section 162, the gear mounting section is used for fixedly mounting a balance shaft driving gear, the sprocket mounting section is used for fixedly mounting a timing sprocket, a transmission section 170 is coaxially arranged on the front end shaft, an engine oil pump 200 is drivingly connected to the transmission section, an outer pump shell 210 and an inner rotor 220 are arranged outside the engine oil pump, the inner rotor is rotatably arranged in the pump shell, the pump shell is fixedly mounted to the inner side wall of a timing cover 300, and the inner rotor is provided with a mounting hole 221 which is drivingly connected to the transmission section, so that the inner rotor and the transmission section are coaxially and drivingly connected.

[0014] The mounting mode of the embodiment is that the crankshaft body is first mounted into an engine cylinder body, the rear end shaft is used for connecting a flywheel, the crank shaft journals are rotatably matched with the engine cylinder body, the connecting rod journals are rotatably matched with piston connecting rods, and the balance shaft driving gear and the timing sprocket can be mounted on the front end shaft; the pump shell of the engine oil pump is first fixedly mounted to the inner side wall of the timing cover, and then the timing cover is integrally mounted to one side of the engine, in the mounting process, the mounting hole on the inner rotor is directly inserted into the transmission section, and then the timing cover is completely fixed. In the embodiment, the inner rotor of the engine oil pump is directly connected to the transmission section of the crankshaft body, a more efficient transmission mode and a more simplified transmission structure are realized, the overall engine structure is simplified, the production cost is reduced, and the production efficiency is improved.

[0015] Specifically, as shown in Figure 3 , the cross section of the transmission section is a waist circle, which is composed of two tile-shaped side surfaces 171, two flat side surfaces 172 and an end surface 173, and the shape of the mounting hole is adapted to the outer contour of the transmission section. In the embodiment, the transmission section is designed in such a shape in order to realize the rotation matching with the mounting hole and make the two more easily directly inserted into each other in the mounting process. In the actual mounting process, the timing cover completely covers the engine oil pump, and the mounting worker almost directly inserts the mounting hole into the transmission section.

[0016] As shown in Figure 2 , the end surface is provided with a positioning hole 174 which is coaxial with the rotation axis of the transmission section. In the mounting stage, the worker inserts a positioning pin into the positioning hole in advance, and the positioning pin plays an auxiliary guiding role in the mounting process, is first inserted into the mounting hole and is helpful to the subsequent direct insertion of the mounting hole into the transmission section. Meanwhile, the timing cover is provided with an opening hole 310 which is directly opposite to the mounting hole, so that the worker can take out the positioning pin from the opening hole.

[0017] As shown in Figure 1 and Figure 2 , the outer side wall of the pump shell is a flat surface, and the pump shell is provided with a plurality of bolt holes 211 so as to be integrally fixedly mounted to the inner wall of the timing cover.

[0018] See Figure 2 The maximum outer diameter of the transmission section is smaller than the outer diameter of the front end shaft, so that a limiting portion 180 is formed between the two.

[0019] It will be apparent to those skilled in the art that modifications can be made to the embodiments described above without departing from the scope of the application. All such modifications are intended to be included within the scope of the claims.

Claims

1. A crankshaft for a range extender for a direct drive oil pump comprising a crankshaft body, the crankshaft body comprising a rear end shaft, a crank, a counterweight, a crankshaft journal, a connecting rod journal and a front end shaft, characterized in that: The front end shaft is coaxially provided with a transmission section, the transmission section is drivingly connected with an oil pump, the oil pump is externally provided with a pump shell and an inner rotor, the inner rotor is rotatably assembled on the pump shell, the pump shell is fixedly installed on the inner side wall of the timing cover, the inner rotor is provided with a mounting hole drivingly connected with the transmission section, so that the inner rotor and the transmission section are coaxially drivingly connected.

2. The range extender crankshaft for a direct drive engine oil pump of claim 1, wherein: The transmission section is in the shape of a waist circle, which is composed of two tile-shaped side surfaces, two flat side surfaces and an end surface, and the shape of the mounting hole is adapted to the outer contour of the transmission section.

3. The crankshaft for use in the range extender of the direct drive engine oil pump according to claim 2, characterized in that: The end surface is provided with a positioning hole coaxial with the rotation axis of the transmission section.

4. The over runner for a direct drive oil pump crankshaft of claim 1, wherein: The outer side wall of the pump shell is a flat surface, and the pump shell is provided with a plurality of bolt holes.

5. The over runner for a direct drive oil pump crankshaft of claim 1, wherein: The maximum outer diameter of the transmission section is smaller than the outer diameter of the front end shaft, so that a limiting portion is formed between the transmission section and the front end shaft.

6. The crankshaft for the range extender of the direct drive engine oil pump according to claim 5, characterized in that: The front end shaft is divided into a gear mounting section and a chain wheel mounting section.

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