A sealing structure of a range extender ISG generator

Abstract

The range extender ISG generator sealing structure of the present invention comprises a rear oil seal seat and an adapter plate, the rear oil seal seat and the adapter plate are connected between one end of the engine crankshaft and the ISG motor, the rear oil seal seat is provided with a connection hole I, the adapter plate is provided with a connection hole II, one end of the engine crankshaft passes through the connection hole I of the rear oil seal seat and then enters the connection hole II of the adapter plate to be connected with the ISG motor rotor, the outer end face of the connection hole I of the rear oil seal seat is provided with a flat rear oil seal seat sealing surface, the connection hole II of the adapter plate is a circular through hole arranged in the middle of the adapter plate, the inner side of the adapter plate is protrudingly provided with an annular boss I at the periphery of the connection hole II, the axial surface of the annular boss I is a flat adapter plate sealing surface, when the engine crankshaft and the ISG motor rotor are connected, the sealing surface of the rear oil seal seat is butted against the sealing surface of the adapter plate, and the sealing surface of the rear oil seal seat and the sealing surface of the adapter plate are sealed by a glue coating seal or an O-ring seal. The present invention can reduce the processing difficulty of the sealing structure, improve the product qualification rate and sealing reliability.

Description

Technical Field

[0001] The present invention relates to the field of engine technology, and in particular to a sealing structure of a range extender (ISG) generator. Background Art

[0002] The rotor of the range extender's ISG motor is connected through the engine crankshaft, and the engine drives the ISG motor to generate electricity. In the operating environment of the ISG motor, the IP67 sealing requirements must be met between the ISG motor and the engine.

[0003] At present, in order to develop on a platform and reduce product development costs, the range extender ISG motor usually shares the powertrain with the traditional fuel vehicle engine. The rear end face of the engine needs to be compatible with the transmission flange face and the ISG motor flange face. Usually, the transmission end face sealing only needs a dustproof baffle, but the ISG motor needs to be waterproof, dustproof and oilproof.

[0004] At present, the ISG motor and the rear end of the engine are sealed using the following solutions:

[0005] 1. It is necessary to design a curved surface Ⅰ2 (such as Figure 1 The rear end face of the crankcase (not shown in the figure) forms a sealing transition surface. The arc surface Ⅰ2 of the rear oil seal seat and the rear end face of the crankcase have high machining matching accuracy requirements, and the machining qualification rate is low.

[0006] 2. The ISG motor is connected to the engine via an adapter plate 4 (such as Figure 2 As shown in the figure), the adapter plate 4 and the engine seal need to be processed with an arc surface II5 that matches the arc surface I2 of the rear oil seal seat. The arc surface processing is difficult. The other side surface of the adapter plate 4 and the motor seal (as shown in the figure) Figure 3 As shown), the sealing surface is sealed with glue. Summary of the invention

[0007] The purpose of the present invention is to provide a range extender ISG generator sealing structure in view of the defects of the above-mentioned prior art, which can reduce the processing difficulty of the sealing structure and improve the product qualification rate and sealing reliability.

[0008] The technical solution adopted by the present invention to achieve the above-mentioned purpose is: a sealing structure of a range extender ISG generator, comprising a rear oil seal seat and an adapter plate, the rear oil seal seat and the adapter plate are connected between one end of the engine crankshaft and the ISG motor, a circular connecting hole I is provided in the middle of the rear oil seal seat, a connecting hole II is provided on the adapter plate, one end of the engine crankshaft passes through the connecting hole I of the rear oil seal seat and then enters the connecting hole II of the adapter plate to be connected with the rotor of the ISG motor, a flat rear oil seal seat sealing surface is provided on the outer end face of the connecting hole I of the rear oil seal seat, the connecting hole II of the adapter plate is a circular through hole arranged in the middle of the adapter plate, an annular boss I is protruding from the inner side of the adapter plate at the periphery of the connecting hole II, the axial surface of the annular boss I is a flat adapter plate sealing surface, when the engine crankshaft and the rotor of the ISG motor are connected, the sealing surface of the rear oil seal seat is butted against the sealing surface of the adapter plate, and the sealing surface of the rear oil seal seat and the sealing surface of the adapter plate are sealed by a glue coating seal or an O-ring seal.

[0009] A further technical solution of the present invention is that the rear oil seal seat is trapezoidal in shape as a whole, and rear oil seal seat mounting holes connected to the engine crankcase are respectively opened on the upper, lower and both sides of the rear oil seal seat.

[0010] A further technical solution of the present invention is: the adapter plate is circular as a whole, and an adapter plate mounting hole is provided on the periphery of the adapter plate for simultaneously connecting the engine crankcase and the ISG motor housing, the inner surface of the adapter plate is connected to the engine crankcase, and the outer surface of the adapter plate is connected to the ISG motor housing.

[0011] A further technical solution of the present invention is: the inner surface of the adapter plate includes a first inner surface and a second inner surface formed by the inner side of the first inner surface being recessed toward the side where the ISG motor is located, the first inner surface is docked with the engine crankcase, the annular boss I is formed by extending from the second inner surface toward one end of the engine crankshaft, and the annular boss I does not protrude beyond the first inner surface in the axial direction of the crankshaft.

[0012] A further technical solution of the present invention is: an annular boss II is protrudingly provided on the outer surface of the adapter plate at the periphery of the connecting hole II, and a step surface with a larger aperture than that of the connecting hole II is provided on the inner side of the annular boss II which is recessed toward the side where the engine crankshaft is located, and the step surface and the connecting hole II are interconnected. When the engine crankshaft and the ISG motor are connected, the rotor of the ISG motor enters the connecting hole II of the adapter plate and is directly connected to the end face of the engine crankshaft, and the rotor of the ISG motor and the end face of the engine crankshaft are locked with flywheel bolts; the sealing structure also includes an oil seal ring which is sleeved on the rotor surface of the ISG motor and positioned in the step surface.

[0013] A further technical solution of the present invention is that the inner diameter of the oil seal ring is equal to the outer diameter of the ISG motor rotor, and the outer diameter of the oil seal ring is equal to the outer diameter of the step surface.

[0014] The sealing structure of the range extender ISG generator of the present invention has the following beneficial effects:

[0015] 1. Reduce processing difficulty

[0016] The range extender ISG generator sealing structure of the present invention is connected between the engine crankshaft and the ISG motor. When the engine crankshaft and the ISG motor are connected, the sealing surface of the rear oil seal seat is butted against the sealing surface of the adapter plate, and a glue seal or an O-ring seal is used between the sealing surface of the rear oil seal seat and the sealing surface of the adapter plate. The sealing surface of the rear oil seal seat and the sealing surface of the adapter plate are both flat planes. There is no need to process the sealing transition curved surface of the rear oil seal seat and the arc surface of the adapter plate, which reduces the processing difficulty of the two parts, ensures the qualified rate of parts processing, and increases the reliability of the seal.

[0017] 2. Sealing and waterproofing

[0018] Since the adapter plate and the rotor of the sealing structure of the range extender ISG generator of the present invention are sealed with an oil seal ring, this double ensures that when the range extender assembly ISG motor is wading on the vehicle, splashing water and engine oil are prevented from entering the motor, ensuring that the motor sealing level reaches IP67 and the reliability of the range extender assembly is guaranteed.

[0019] 3. Reduce development costs

[0020] Since the rear oil seal seat of the present invention is compatible with the range extender engine and the traditional fuel engine, the development cost can be reduced.

[0021] The sealing structure of the range extender ISG generator of the present invention will be further described below in conjunction with the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the connection between the rear oil seal seat and the crankshaft in the prior art;

[0023] Figure 2 It is a schematic diagram of a prior art adapter board;

[0024] Figure 3 It is a schematic diagram of the connection between the ISG motor and the adapter plate in the prior art;

[0025] Figure 4 It is a three-dimensional diagram of a rear oil seal seat (the end of the crankshaft is positioned in the connecting hole Ⅰ of the rear oil seal seat) of a sealing structure of a range extender ISG generator of the present invention;

[0026] Figure 5 It is a three-dimensional diagram of an adapter plate of a sealing structure of a range extender ISG generator of the present invention;

[0027] Figure 6 yes Figure 5 A front view of the adapter plate shown;

[0028] Figure 7 yes Figure 6 AA section view;

[0029] Figure 8 yes Figure 5 Schematic diagram of the connection between the adapter plate and the ISG motor housing;

[0030] Fig. 9 yes Figure 8 The main view of

[0031] Fig.10 yes Fig. 9 AA section view;

[0032] Fig.11 It is a schematic diagram of a range extender ISG generator sealing structure connecting an engine crankshaft (only a part is shown) and an ISG motor rotor of the present invention;

[0033] Fig.12 yes Fig.11 The main view of

[0034] Fig.13 yes Fig.12 AA section view;

[0035] Fig.14 yes Fig.13 A magnified view of

[0036] Fig.15 It is a schematic diagram of the connection structure between the ISG motor and the engine crankshaft of a range extender ISG generator sealing structure of the present invention;

[0037] Fig.16 yes Fig.15 AA section view;

[0038] Explanation of the accompanying numbers: 1-rear oil seal seat, 2-arc surface Ⅰ, 3-crankshaft, 4-adapter plate, 5-arc surface Ⅱ, 6-rear oil seal seat sealing surface, 7-connecting hole Ⅰ, 8-rear oil seal seat mounting hole, 9-first inner surface, 10-adapter plate mounting hole, 11-annular boss Ⅰ, 12-adapter plate sealing surface, 13-connecting hole Ⅱ, 14-second inner surface, 15-adapter plate outer surface, 16-annular boss Ⅱ, 17-step surface, 18-rotor, 19-flywheel bolt, 20-oil seal ring, 21-ISG motor housing. DETAILED DESCRIPTION

[0039] like Figures 4 to 16As shown, the sealing structure of the range extender ISG generator of the present invention includes a rear oil seal seat 1 and an adapter plate 4. The rear oil seal seat 1 and the adapter plate 4 are connected between one end of the engine crankshaft 3 and the ISG motor. A circular connecting hole Ⅰ7 is provided in the middle of the rear oil seal seat 1, and a connecting hole Ⅱ13 is provided on the adapter plate 4. One end of the engine crankshaft 3 passes through the connecting hole Ⅰ7 of the rear oil seal seat 1 and then enters the connecting hole Ⅱ13 of the adapter plate 4 to connect with the rotor of the ISG motor. The ISG motor includes an ISG motor housing and a rotor and a stator arranged on the inner side of the housing. The stator has no direct relationship with the inventive point of the present invention and is not shown in the figure.

[0040] like Figure 4 As shown, the rear oil seal seat 1 is trapezoidal in shape as a whole, and rear oil seal seat mounting holes 8 connected to the engine crankcase (not shown in the figure) are respectively opened on the upper and lower sides and both sides of the rear oil seal seat 1. A flat rear oil seal seat sealing surface 6 is provided on the outer end surface of the connection hole Ⅰ7 of the rear oil seal seat 1. The outer end surface of the connection hole Ⅰ7 of the rear oil seal seat 1 is the end surface of the connection hole Ⅰ7 away from the crankcase. The inner side of the rear oil seal seat 1 is connected to the engine crankcase, and the outer side of the rear oil seal seat 1 is connected to the adapter plate 4 (see Fig.16 as shown).

[0041] like Figures 5 to 7 As shown, the adapter plate 4 is circular in shape as a whole, and an adapter plate mounting hole 10 is provided on the periphery of the adapter plate 4 for simultaneously connecting the engine crankcase (not shown in the figure) and the ISG motor housing 21. The inner surface of the adapter plate 4 is connected to the engine crankcase, and the outer surface 15 of the adapter plate is connected to the ISG motor housing 21. Figure 8 , 9 As shown in Figures 10, the ISG motor housing 21 and the outer surface 15 of the adapter plate can be sealed by glue coating or O-ring. The connection hole II13 of the adapter plate 4 is a circular through hole set in the middle of the adapter plate 4. The inner side of the adapter plate is protrudingly provided with an annular boss I11 at the periphery of the connection hole II13. The axial surface of the annular boss I11 is a flat adapter plate sealing surface 12. In this embodiment, the inner surface of the adapter plate includes a first inner surface 9 and a second inner surface 14 formed by the inner side of the first inner surface 9 being recessed toward the side where the ISG motor is located. The first inner surface 9 is docked with the engine crankcase (not shown in the figure), and the annular boss I11 is formed by extending from the second inner surface 14 to one end of the engine crankshaft, and the annular boss I11 does not protrude from the first inner surface 9 in the axial direction of the crankshaft 3, that is, the annular boss I11 is not higher than the first inner surface 9. An annular boss Ⅱ16 is protruding from the outer surface 15 of the adapter plate at the periphery of the connecting hole Ⅱ13. The inner side of the annular boss Ⅱ16 is recessed toward the engine crankshaft and is provided with a circular step surface 17 with a larger aperture than the connecting hole Ⅱ13. The step surface 17 and the connecting hole Ⅱ13 are interconnected.

[0042] like Figures 11 to 16As shown, when the engine crankshaft and the rotor of the ISG motor are connected, the rear oil seal seat 1 is connected to the engine crankcase through the rear oil seal seat mounting hole 8, the adapter plate 4 is connected to the outside of the rear oil seal seat 1, the first inner surface 9 of the adapter plate 4 is butted against the engine crankcase, the outer surface 15 of the adapter plate is connected to the ISG motor housing 21, and the outer surface 15 of the adapter plate and the ISG motor housing 21 can be sealed by glue or O-ring. One end of the engine crankshaft (only a section of the crankshaft end is shown in the figure) passes through the connection hole Ⅰ7 of the rear oil seal seat 1 and then enters the connection hole Ⅱ13 of the adapter plate 4 to connect with the rotor 18 of the ISG motor. The rotor 18 of the ISG motor enters the connection hole Ⅱ13 of the adapter plate 4 and is directly connected to the end face of the engine crankshaft. When the engine crankshaft and the ISG motor are connected, the sealing surface 6 of the rear oil seal seat is butted against the sealing surface 12 of the adapter plate, and the sealing surface 6 of the rear oil seal seat and the sealing surface 12 of the adapter plate are sealed by glue or O-ring. The rotor 18 of the ISG motor is locked with the end face of the engine crankshaft by the flywheel bolt 19. The sealing structure also includes an oil seal ring 20 which is sleeved on the surface of the rotor 18 of the ISG motor and positioned in the step surface 17. The inner diameter of the oil seal ring 20 is equal to the outer diameter of the rotor 18 of the ISG motor, and the outer diameter of the oil seal ring 20 is equal to the outer diameter of the step surface 17. The oil seal ring 20 is used in the axial direction to prevent dust and oil, and ensure the sealing requirements of the ISG motor IP67.

[0043] The above embodiments are only preferred embodiments of the present invention. The structure of the present invention is not limited to the forms listed in the above embodiments. Any modifications, equivalent substitutions, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A range extender ISG generator sealing structure, comprising a rear oil seal seat (1) and an adapter plate (4), wherein the rear oil seal seat (1) and the adapter plate (4) are connected between one end of an engine crankshaft (3) and an ISG motor rotor, wherein a circular connecting hole I (7) is provided in the middle of the rear oil seal seat (1), and a connecting hole II (13) is provided on the adapter plate (4), wherein one end of the engine crankshaft (3) passes through the connecting hole I (7) of the rear oil seal seat (1) and then enters the connecting hole II (13) of the adapter plate (4) to be connected to the rotor of the ISG motor, wherein the structure is characterized in that: The outer end surface of the connecting hole I (7) of the rear oil seal seat (1) is provided with a flat rear oil seal seat sealing surface (6); the connecting hole II (13) of the adapter plate (4) is a circular through hole arranged in the middle of the adapter plate (4); the inner side surface of the adapter plate (4) is provided with an annular boss I (11) protruding around the connecting hole II (13); the axial surface of the annular boss I (11) is a flat adapter plate sealing surface (12); when the engine crankshaft (3) and the rotor of the ISG motor are connected, the sealing surface (6) of the rear oil seal seat is butted against the sealing surface (12) of the adapter plate; the sealing surface (6) of the rear oil seal seat is connected to the adapter plate. The sealing surfaces (12) are sealed by means of a glue coating or an O-ring; the rear oil seal seat (1) is trapezoidal in shape as a whole, and rear oil seal seat mounting holes (8) connected to the engine crankcase are respectively provided on the upper and lower sides and both sides of the rear oil seal seat (1); the adapter plate (4) is circular in shape as a whole, and an adapter plate mounting hole (10) that can be connected to the engine crankcase and the ISG motor housing (6) is provided on the periphery of the adapter plate (4); the inner surface of the adapter plate (4) is connected to the engine crankcase, and the outer surface (15) of the adapter plate is connected to the ISG motor housing (21); the inner surface of the adapter plate includes the first An inner surface (9) and a second inner surface (14) formed by the inner side of the first inner surface (9) being recessed toward the side where the ISG motor is located, the first inner surface (9) being butted against the engine crankcase, an annular boss I (11) being formed by extending from the second inner surface (14) toward one end of the engine crankshaft (3), and the annular boss I (11) not protruding from the first inner surface (9) in the axial direction of the crankshaft (3); an annular boss II (16) is protrudingly provided on the outer surface (15) of the adapter plate at the periphery of the connecting hole II (13), and the inner side of the annular boss II (16) is recessed toward the engine crankshaft (3) ) is provided with a step surface (17) having a larger aperture than the aperture of the connecting hole II (13), the step surface (17) and the connecting hole II (13) are mutually connected, when the engine crankshaft (3) and the ISG motor are connected, the rotor (18) of the ISG motor enters the connecting hole II (13) of the adapter plate and is directly connected to the end face of the engine crankshaft (3), and the rotor (18) of the ISG motor and the end face of the engine crankshaft (3) are locked by the flywheel bolt (19); the sealing structure also includes an oil seal ring (20) which is sleeved on the surface of the rotor (18) of the ISG motor and positioned in the step surface (17).

2. The range extender ISG generator sealing structure according to claim 1, characterized in that: The inner diameter of the oil seal ring (20) is equal to the outer diameter of the ISG motor rotor (18), and the outer diameter of the oil seal ring (20) is equal to the outer diameter of the step surface (17).

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