Crankshaft oil seal structure, range extender and automobile

Abstract

The embodiment of the utility model provides a crankshaft oil seal structure, a range extender and an automobile, and relates to the field of automobile parts. The crankshaft oil seal structure comprises a framework and an oil seal main body, wherein the framework is connected to the outer side wall of the oil seal main body, an engine side lip and a generator side lip are formed on the inner side wall of the oil seal main body, and the engine side lip and the generator side lip are spaced and form a pressure stabilizing cavity. According to the crankshaft oil seal structure, the overall structural strength can be ensured through the framework, the engine side lip and the generator side lip are used for conducting liquid sealing on the engine side lubricating oil and the generator side lubricating oil respectively, and compared with two oil seal structures in the prior art, the installation steps are simplified, and the assembly difficulty is reduced. The range extender comprises the crankshaft oil seal structure and has all functions of the crankshaft oil seal structure. The automobile comprises the range extender and has all functions of the range extender.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of automobile parts, and concretely relates to a crankshaft oil seal structure, a range extender and an automobile. BACKGROUND

[0002] The range extender generally refers to an electric automobile part capable of providing additional electric energy, so that the electric automobile can increase the driving mileage, and is generally understood as the combination of an engine and a generator.

[0003] In the existing range extender, because the lubricating oils on the engine side and the generator side are inconsistent, two oil seal structures are needed to realize liquid sealing, but there are problems of complicated installation and difficult assembly when installing the two oil seals. SUMMARY

[0004] The utility model provides a crankshaft oil seal structure, a range extender and an automobile, which can realize liquid sealing of the lubricating oils on the engine side and the generator side through two lips, simplifies the installation steps and reduces the assembly difficulty.

[0005] The embodiment of the utility model can be realized as follows:

[0006] In a first aspect, the embodiment of the utility model provides a crankshaft oil seal structure, which comprises:

[0007] A framework and an oil seal body;

[0008] The inner side wall of the oil seal body is formed with an engine side lip and a generator side lip, and the engine side lip and the generator side lip are spaced apart and form a pressure stabilizing cavity.

[0009] Optionally, the crankshaft oil seal structure further comprises a first elastic member, which is sleeved on the outer side wall of the oil seal body and is arranged correspondingly with the engine side lip.

[0010] Optionally, the crankshaft oil seal structure further comprises a second elastic member, which is sleeved on the outer side wall of the oil seal body and is arranged correspondingly with the generator side lip.

[0011] Optionally, the oil seal body is provided with a ventilation channel, and the ventilation channel is in communication with the pressure stabilizing cavity.

[0012] Optionally, the outer side wall of the oil seal body is formed with a positioning groove, and the framework is embedded in the positioning groove.

[0013] Optionally, the generator side lip and the generator side lip are formed with a first blade and a second blade on the side close to each other, and the first blade and the second blade are reversely arranged.

[0014] Optionally, the crankshaft oil seal structure further comprises a sealing member, which is arranged on the end face of the framework.

[0015] Optionally, the end face of the framework is provided with a mounting hole, which is located outside the sealing member.

[0016] In a second aspect, the embodiment of the utility model further provides an extended range device, which comprises the crankshaft oil seal structure.

[0017] In a third aspect, the embodiment of the utility model further provides an automobile, which comprises the extended range device.

[0018] The crankshaft oil seal structure, the extended range device and the automobile of the embodiment of the utility model have the following beneficial effects, for example:

[0019] The crankshaft oil seal structure comprises a framework and an oil seal body; wherein the framework is connected to the outer side wall of the oil seal body, the inner side wall of the oil seal body is formed with an engine side lip and a generator side lip, the engine side lip and the generator side lip are spaced apart and form a pressure stabilizing cavity. The crankshaft oil seal structure can ensure the overall structural strength through the framework, and use the engine side lip and the generator side lip to respectively seal the engine side lubricating oil and the generator side lubricating oil, thereby simplifying the installation steps and reducing the assembly difficulty compared with the two oil seal structures in the prior art.

[0020] The extended range device comprises the crankshaft oil seal structure, and has all the functions of the crankshaft oil seal structure.

[0021] The automobile comprises the extended range device, and has all the functions of the extended range device. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical scheme of the embodiment of the utility model, the following will briefly introduce the drawings needed to be used in the embodiment, and it should be understood that the following drawings only show some embodiments of the utility model, and therefore should not be regarded as a limitation to the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0023] Figure 1 It is a structure schematic view of the crankshaft oil seal structure in the first visual angle provided in the embodiment of the utility model;

[0024] Figure 2 It is a structure schematic view of the crankshaft oil seal structure in the second visual angle provided in the embodiment of the utility model;

[0025] Figure 3 It is a structure schematic view of the crankshaft oil seal structure in the second visual angle provided in the embodiment of the utility model; Figure 2 It is a local enlarged schematic view of III.

[0026] Icon: 100 - crankshaft oil seal structure; 110 - skeleton; 111 - mounting hole; 120 - oil seal body; 121 - engine side lip; 122 - generator side lip; 123 - pressure stabilizing cavity; 124 - air passage; 125 - positioning groove; 126 - first blade; 127 - second blade; 130 - first elastic member; 140 - second elastic member; 150 - sealing member. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the present application.

[0029] It should be noted that: similar reference numbers and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0030] In the description of the present application, it should be noted that if the terms "upper", "lower", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product of the present application is usually placed, which is only for the convenience of describing the present application 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 limiting the present application.

[0031] In addition, if the terms "first", "second" and the like appear, they are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0032] The terms "comprise", "contain", or any other variant thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without more limitations, the element defined by the phrase "comprising a" does not exclude the presence of additional identical elements in the process, method, article, or apparatus comprising the element.

[0033] Unless otherwise explicitly specified and limited, the terms "provide", "connect" and the like should be broadly understood, for example, "connect" can be fixedly connected, or detachably connected, or integrally connected, can be mechanically connected, or electrically connected, can be directly connected, or indirectly connected through an intermediate medium, and can be internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0034] It should be noted that the features in the embodiments of the utility model can be combined with each other without conflict.

[0035] As mentioned in the background, the range extender generally refers to an electric vehicle part that can provide additional electric energy, so that the electric vehicle can increase the driving range, and is usually understood as the combination of an engine and a generator. In the existing range extender, because the lubricating oil on the engine side and the generator side is inconsistent, two oil seal structures are needed to realize liquid sealing, but when installing two oil seals, there are problems of complex installation and difficult assembly.

[0036] Please refer to Figure 1 and Figure 3 The crankshaft oil seal structure 100, the range extender and the automobile provided in the embodiments of the utility model can solve the above problems, which will be described in detail.

[0037] In a first aspect, the embodiments of the utility model provide a crankshaft oil seal structure 100 applied to a range extender, which comprises a framework 110 and an oil seal body 120.

[0038] Among them, the framework 110 is connected to the outer side wall of the oil seal body 120, the inner side wall of the oil seal body 120 is formed with an engine side lip 121 and a generator side lip 122, the engine side lip 121 and the generator side lip 122 are spaced apart and form a pressure stabilizing cavity 123.

[0039] The crankshaft oil seal structure 100 can ensure the overall structural strength through the framework 110, and use the engine-side lip 121 and the generator-side lip 122 to respectively seal the engine-side lubricating oil and the generator-side lubricating oil, thereby simplifying the installation steps and reducing the assembly difficulty compared with the two oil seal structures in the prior art.

[0040] Notably, the oil seal body 120 is a hollow structure, the inner cavity of which is used for the crankshaft to pass through, and the engine-side lip 121 and the generator-side lip 122 are in interference fit with the outer circle of the crankshaft. The presence of the pressure stabilizing cavity 123 is used to stabilize the air pressure on both sides, because the cavity will slowly reach a vacuum state under the pumping action, which is beneficial to balance the air pressure on both ends of the engine.

[0041] Please refer to Figure 1 and Figure 3 In order to improve the relative position accuracy of the framework 110 and the oil seal body 120, the outer side wall of the oil seal body 120 can be formed with a positioning groove 125, and the framework 110 is embedded in the positioning groove 125, thereby avoiding the separation of the framework 110 and the oil seal body 120.

[0042] Please refer to Figure 1 In addition to liquid sealing, in order to avoid the mixing of dust and impurities, the crankshaft oil seal structure 100 can further include a sealing element 150, which is arranged on the end face of the framework 110.

[0043] Specifically, the end face of the framework 110 can be formed with a sealing groove, and the sealing element 150, which can be a rubber ring, is embedded in the sealing groove and in contact with the cylinder body or the end cover, thereby achieving a solid sealing effect. In addition, the sealing element 150 can be integrated with the framework 110 through a vulcanization process.

[0044] At the same time, in order to prevent the overall crankshaft oil seal structure 100 from being easily separated from the working chamber of the range extender, the end face of the framework 110 can be provided with mounting holes 111, which are located outside the sealing element 150.

[0045] In this embodiment, the number of mounting holes 111 is eleven, including two positioning holes and nine connecting holes. The two positioning holes are respectively located on both sides of the sealing element 150, and the nine connecting holes are arranged relatively uniformly around the sealing element 150. In addition, the two positioning holes and the nine connecting holes are all circular holes. The positioning holes are used for inserting positioning pins, which can be round pins or diamond-shaped pins, and the connecting holes are used for inserting bolts or connecting elements such as shafts.

[0046] Of course, in other embodiments of the utility model, the number of positioning holes can also be one, three, four, etc., thereby achieving under-positioning or over-positioning effect, the connecting holes can be two, three, five, etc., and the specific number of positioning holes and connecting holes is not limited. In addition, the positioning holes and the connecting holes can also be rectangular, triangular, sector, oval and other shapes, and the specific cross-sectional shape of the two is not limited, and the cross-sectional shape of the two can be consistent or inconsistent.

[0047] Please refer to Figure 2 and Figure 3 In order to ensure sufficient sealing force when contacting the crankshaft, the crankshaft oil seal structure 100 can also include a first elastic member 130, which is sleeved on the outer side wall of the oil seal body 120 and corresponds to the engine side lip 121.

[0048] Similarly, the crankshaft oil seal structure 100 can also include a second elastic member 140, which is sleeved on the outer side wall of the oil seal body 120 and corresponds to the generator side lip 122.

[0049] During operation, the first elastic member 130 and the second elastic member 140 are used to provide elastic force, respectively, to drive the engine side lip 121 and the generator side lip 122 to fully contact the outer circle of the crankshaft, thereby ensuring the liquid sealing effect.

[0050] It should be noted that the first elastic member 130 and the second elastic member 140 are both circular springs and are respectively sleeved on different positions of the outer side wall of the oil seal body 120.

[0051] Please refer to Figure 2 and Figure 3 The generator side lip 122 and the generator side lip 122 form a first blade 126 and a second blade 127 on the side close to each other, and the first blade 126 and the second blade 127 are reversely arranged to form a reverse pumping effect and respectively block the lubricating oil on the engine side and the generator side.

[0052] Please refer to Figure 3 In order to avoid the influence of the sealing effect when the negative pressure in the pressure stabilizing cavity 123 is too high, the oil seal body 120 can be provided with a ventilation channel 124, which communicates with the pressure stabilizing cavity 123.

[0053] In addition, the ventilation channel 124 is located at the lowest point of the entire dynamic seal, which can prevent the lubricating oil on the generator side from being blocked.

[0054] In the embodiment, the ventilation passage 124 is one, and the end of the ventilation passage 124 away from the constant pressure cavity 123 is inclined towards the generator side, and the end of the ventilation passage 124 communicating with the constant pressure cavity 123 is located at the middle position of the constant pressure cavity 123; of course, in other embodiments of the utility model, the number of the ventilation passage 124 can also be two, three, four, etc., and the end of the ventilation passage 124 away from the constant pressure cavity 123 can also be arranged to be inclined towards the generator side, and the end of the ventilation passage 124 close to the constant pressure cavity 123 can be arranged to be inclined towards the engine side or the generator side, and the specific number and form of the ventilation passage 124 are not limited.

[0055] In the embodiment, in order to facilitate the hole processing, the cross section of the ventilation passage 124 can be circular; of course, in other embodiments of the utility model, under the premise of meeting the ventilation performance, the cross section shape of the ventilation passage 124 can also be rectangular, triangular, sector, oval, semicircular or other shapes, and the specific cross section shape of the ventilation passage 124 is not limited.

[0056] In the second aspect, the embodiment of the utility model also provides an extended range device, comprising the crankshaft oil seal structure 100, further comprising a crankshaft, an integrated cylinder body, an oil pan and a generator component, the generator component and the crankshaft and the oil pan are connected to the integrated cylinder body, and the framework 110 of the crankshaft oil seal structure 100 is connected with the integrated cylinder body and the oil pan. The extended range device comprises the crankshaft oil seal structure 100, which has all the functions of the crankshaft oil seal structure 100.

[0057] In the third aspect, the embodiment of the utility model also provides an automobile, comprising the extended range device, further comprising a power battery system, a power driving system, a whole vehicle control system and a vehicle body, each system and the extended range device are installed at different positions of the vehicle body and cooperate together to realize the walking driving of the vehicle body. The automobile can be a car, a cross-country vehicle, a van, a bus and a truck, and the specific type of the automobile is not limited. The automobile comprises the extended range device, which has all the functions of the extended range device.

[0058] In summary, the crankshaft oil seal structure 100, the extended range device and the automobile provided by the embodiment of the utility model have at least the following advantages:

[0059] (1), the crankshaft oil seal structure 100 can ensure the overall structural strength through the framework 110, and the engine side lip 121 and the generator side lip 122 are used for respectively sealing the engine side lubricating oil and the generator side lubricating oil, compared with the two oil seal structures in the prior art, the installation steps are simplified, and the assembly difficulty is reduced.

[0060] (2), the crankshaft oil seal structure 100 is through respectively setting first elastic piece 130 and second elastic piece 140 on the outside of oil seal body 120, and first elastic piece 130 and second elastic piece 140 are correspondingly with engine side lip 121 and generator side lip 122, can make engine side lip 121 and generator side lip 122 are fully contacted with the outer circle of crankshaft, and then fully ensure liquid sealing effect.

[0061] (3), the crankshaft oil seal structure 100 is formed with pressure stabilizing cavity 123 between engine side lip 121 and generator side lip 122, can play the stabilizing effect to the air pressure of both sides, is favorable to air pressure balance;And by setting up and communicating with pressure stabilizing cavity 123 air passage 124, for when the negative pressure of pressure stabilizing cavity 123 possibly influences liquid sealing effect, air passage 124 is ventilated.

[0062] The above is only the specific implementation of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art in the technical range disclosed by the present application can easily think of the changes or replacements, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A crankshaft oil seal structure, characterized in that, include: The skeleton (110) and the oil seal body (120); The skeleton (110) is connected to the outer side wall of the oil seal body (120), and the inner side wall of the oil seal body (120) forms an engine side lip (121) and a generator side lip (122). The engine side lip (121) and the generator side lip (122) are spaced apart and form a pressure stabilizing cavity (123).

2. The crankshaft oil seal structure according to claim 1, characterized in that, The crankshaft oil seal structure also includes a first elastic element (130), which is sleeved on the outer side wall of the oil seal body (120) and correspondingly disposed with respect to the engine side lip (121).

3. The crankshaft oil seal structure according to claim 1, characterized in that, The crankshaft oil seal structure also includes a second elastic element (140), which is sleeved on the outer side wall of the oil seal body (120) and is correspondingly arranged with respect to the generator side lip (122).

4. The crankshaft oil seal structure according to claim 1, characterized in that, The oil seal body (120) has a ventilation channel (124) which is connected to the pressure stabilizing cavity (123).

5. The crankshaft oil seal structure according to claim 1, characterized in that, The outer wall of the oil seal body (120) is formed with a positioning groove (125), and the skeleton (110) is embedded in the positioning groove (125).

6. The crankshaft oil seal structure according to claim 1, characterized in that, The generator side lip (122) and the generator side lip (122) are provided with a first cutting edge (126) and a second cutting edge (127) on their adjacent sides, and the first cutting edge (126) and the second cutting edge (127) are arranged in opposite directions.

7. The crankshaft oil seal structure according to any one of claims 1-6, characterized in that, The crankshaft oil seal structure also includes a seal (150), which is disposed on the end face of the frame (110).

8. The crankshaft oil seal structure according to claim 7, characterized in that, The end face of the frame (110) is provided with a mounting hole (111), which is located on the outside of the seal (150).

9. A range extender, characterized in that, Includes the crankshaft oil seal structure as described in any one of claims 1-8.

10. A car, characterized in that, Includes the range extender as described in claim 9.

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