Camshaft, engine and vehicle

Abstract

The utility model provides a cam shaft, an engine and a vehicle. The cam shaft comprises a shaft body and an oil-gas separator. The shaft body is provided with a containing cavity. The oil-gas separator is arranged in the containing cavity so as to divide the containing cavity into a first containing cavity and a second containing cavity, the oil-gas separator is provided with a separation channel, the separation channel is communicated with the first containing cavity and the second containing cavity, and a separation piece is arranged in the separation channel. According to the cam shaft in the scheme, the oil-gas separator is integrated in the shaft body, and the mechanism of an engine cannot be changed. The oil-gas mixture is separated through the separation pieces, and the overall oil-gas separation efficiency is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobiles, and more specifically to a camshaft, an engine and a vehicle. Background Art

[0002] When the automobile engine is running, if the blowby gas in the engine crankcase is not discharged in time, it will cause the condensation of fuel vapor and water vapor, thereby causing the oil to deteriorate and contaminate the engine parts. If the engine works for a long time, the crankcase pressure will be too high, which is prone to air and oil leakage at various joints.

[0003] The oil-gas separation device is usually arranged on the engine cylinder head and integrated in the cylinder head cover, which increases the layout height of the engine. Integrating the oil-gas separation device in the cylinder head cover will also complicate the structure of the cylinder head cover.

[0004] Therefore, it is necessary to provide a camshaft, an engine and a vehicle to at least partially solve the above problems. Utility Model Content

[0005] A series of simplified concepts are introduced in the utility model content section, which will be further described in detail in the detailed implementation section. The utility model content section of the utility model does not mean to attempt to define the key features and essential technical features of the technical solution claimed for protection, nor does it mean to attempt to determine the scope of protection of the technical solution claimed for protection.

[0006] In order to at least partially solve the above problems, the utility model provides a camshaft in a first aspect, comprising:

[0007] A shaft body, wherein the shaft body has a receiving cavity; and

[0008] An oil-gas separator, the oil-gas separator is arranged in the accommodating chamber to divide the accommodating chamber into a first accommodating chamber and a second accommodating chamber, the oil-gas separator comprises:

[0009] The shell has a separation chamber, a separation inlet and a separation outlet, the separation inlet connects the separation chamber and the first accommodating chamber, the oil-gas separator is provided with a separation channel, the separation channel connects the first accommodating chamber and the second accommodating chamber, and a separation piece is provided in the separation channel.

[0010] According to the camshaft of the first aspect of the utility model, the oil-gas separator is integrated into the interior of the shaft body, and the structure of the engine will not be changed. The oil-gas mixture is separated through the housing and the separator, which greatly improves the overall efficiency of oil-gas separation.

[0011] Optionally, the oil-gas separator comprises:

[0012] The separation channel is arranged in the shell, the separation channel includes a separation chamber, a separation inlet and a separation outlet, the separation inlet connects the separation chamber with the first accommodating chamber, the separation outlet connects the separation chamber with the second accommodating chamber, and the separation element is arranged in the separation chamber.

[0013] Optionally, the outer wall of the shell is provided with a spiral blade, the spiral blade extends along the circumference of the shell to form a separation groove, at least part of the separation groove extends spirally along the axial direction of the shell, and the separation inlet is arranged in the separation groove.

[0014] Optionally, the separation inlet is arranged in plurality along the extension direction of the separation groove.

[0015] Optionally, the housing is provided with a fixing portion, the fixing portion is sealingly connected to the inner wall of the shaft body, and along the flow direction of the fluid, the fixing portion is located downstream of the spiral blade.

[0016] Optionally, the housing is provided with a first fixing hole, the shaft body is provided with a second fixing hole, and the first fixing hole is arranged opposite to the second fixing hole;

[0017] It also includes a fastener, which is inserted into the first fixing hole and the second fixing hole to fix the oil-gas separator to the shaft body.

[0018] Optionally, the shaft body is provided with an oil-gas mixture inlet and an outlet, the oil-gas mixture inlet is communicated with the first accommodating cavity, the outlet is communicated with the second accommodating cavity, and the oil-gas mixture inlet and the outlet are spaced apart along the axial direction of the shaft body.

[0019] Optionally, the shell has an end portion facing the mixture inlet and is provided with a guide protrusion, and the guide protrusion is inclined from the middle portion of the shell to the periphery of the shell along the axial direction.

[0020] Optionally, the separation outlet is provided at an end of the shell facing the outlet.

[0021] Optionally, the separation member at least partially covers the separation inlet.

[0022] Optionally, the separation piece is annular and fits against the inner wall of the separation chamber.

[0023] Optionally, the shaft body has a first end portion of the shaft body and a second end portion of the shaft body which are arranged oppositely along the axial direction thereof, and the oil-gas mixture inlet is located between the first end portion of the shaft body and the second end portion of the shaft body.

[0024] Optionally, an oil retaining ring is disposed on the outer sleeve of the shaft body, the oil retaining ring covers the oil-gas mixture inlet in the orthographic projection of the shaft body, and the oil retaining ring is spaced apart from the oil-gas mixture inlet in the radial direction.

[0025] Optionally, a rear end cover is provided at the second end of the shaft body, and the rear end cover is rotatably connected to the shaft body.

[0026] Optionally, the rear end cover is provided with an air outlet channel and an oil return channel spaced apart from each other, and both the air outlet channel and the oil return channel are communicated with the accommodating cavity.

[0027] Optionally, the rear end cover comprises:

[0028] An inner tube portion, the inner tube portion extending along the axial direction, and the inner tube portion extending into the shaft body;

[0029] an outer tube portion, the outer tube portion extending along the axial direction, at least a portion of the inner tube portion and the outer tube portion being spaced apart from each other in a radial direction, and the outer tube portion being sleeved outside the shaft body; and

[0030] The rear end portion, the inner tube portion and the outer tube portion are both connected to the rear end portion, and the rear end portion is provided with an air outlet pipe and an oil return pipe spaced apart from each other; wherein,

[0031] The inner tube portion is communicated with the air outlet pipe to form the air outlet passage;

[0032] The outer tube portion is communicated with the oil return pipe to form the oil return passage.

[0033] Optionally, at least a portion of the inner tube portion is spaced apart from the shaft body in a radial direction, and the accommodating cavity is connected to the oil return channel through the space.

[0034] Optionally, an oil seal is provided between the outer tube portion and the shaft body.

[0035] Optionally, a front end cover is provided at the first end of the shaft body, and the front end cover is provided with a signal disk.

[0036] Optionally, the shaft body is hollow inside to form the accommodating cavity; and / or

[0037] The separating piece is felt.

[0038] The second aspect of the utility model provides an engine, comprising the above-mentioned camshaft, which does not increase the height of the engine, does not increase the complexity of the engine cylinder head cover, and significantly improves the oil-gas separation efficiency and engine performance, and reduces emission pollution.

[0039] The third aspect of the utility model provides a vehicle, comprising the above engine, which improves the fuel economy of the vehicle and reduces the daily use cost through efficient oil and gas separation. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The following drawings of the embodiments of the present invention are used as part of the present invention for understanding the present invention. The drawings show the embodiments of the present invention and their descriptions, and are used to explain the principles of the present invention. In the drawings,

[0041] Figure 1 A three-dimensional schematic diagram of a camshaft according to a preferred embodiment of the utility model;

[0042] Figure 2 A cross-sectional schematic diagram of a camshaft according to a preferred embodiment of the utility model;

[0043] Figure 3 A schematic front view of an oil-gas separator according to a preferred embodiment of the utility model;

[0044] Figure 4 A cross-sectional schematic diagram of an oil-gas separator according to a preferred embodiment of the utility model;

[0045] Figure 5 This is a schematic front view of an oil retainer ring of a preferred embodiment of the utility model;

[0046] Figure 6 A schematic front view of a rear end cover of a preferred embodiment of the utility model;

[0047] Figure 7 A cross-sectional schematic diagram of a rear end cover of a preferred embodiment of the utility model;

[0048] Figure 8 The figure is a schematic front view of a front end cover of a preferred embodiment of the utility model.

[0049] Description of Reference Numerals

[0050] 10: Axis body

[0051] 101: Accommodation cavity

[0052] 1001: First accommodating chamber

[0053] 1002: Second accommodating chamber

[0054] 102: Oil and gas mixture import

[0055] 103: Export

[0056] 104: Second fixing hole

[0057] 1001: First end of the shaft body

[0058] 1002: Second end of the shaft body

[0059] 11: Cam

[0060] 20: Oil and gas separator

[0061] 21: Shell

[0062] 211: Separation chamber

[0063] 212: Separate import

[0064] 213: Separation exit

[0065] 214: Spiral blade

[0066] 2141: Separation tank

[0067] 215: Guide protrusion

[0068] 216: Fixed part

[0069] 2161: First fixing hole

[0070] 2101: First end of the shell

[0071] 2102: Second end of the shell

[0072] 22: Separation

[0073] 30: Fasteners

[0074] 40: Oil retaining ring

[0075] 50: Rear end cover

[0076] 501: Exhaust channel

[0077] 502: Oil return channel

[0078] 51: Inner tube

[0079] 52: External Management Department

[0080] 53: rear end

[0081] 531: Exhaust pipe

[0082] 532: Oil return pipe

[0083] 54: Oil seal

[0084] 60: Front cover

[0085] 61: Signal disk

[0086] 71: Oil-gas mixture

[0087] 72: Separated gas

[0088] 73: Oil Drops DETAILED DESCRIPTION

[0089] In the following description, a large number of specific details are given to provide a more thorough understanding of the present invention. However, it is obvious to those skilled in the art that the present invention can be implemented without one or more of these details. In other examples, in order to avoid confusion with the present invention, some technical features known in the art are not described.

[0090] In this document, ordinal numbers such as "first" and "second" cited in the present invention are merely identifiers and do not have any other meanings, such as a specific order, etc. Moreover, for example, the term "first component" itself does not imply the existence of the "second component", and the term "second component" itself does not imply the existence of the "first component".

[0091] In this document, “upper”, “lower”, “front”, “back”, “left”, “right”, etc. are only used to indicate the relative position relationship between related parts, rather than to limit the absolute positions of these related parts.

[0092] In this document, “equal”, “same”, etc. are not strictly limited in a mathematical and / or geometric sense, but also include errors that can be understood by those skilled in the art and are allowed in manufacturing or use.

[0093] Unless otherwise stated, the numerical ranges herein include not only the entire range within its two endpoints but also include several sub-ranges contained therein.

[0094] Now, exemplary embodiments according to the present utility model will be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in a variety of different forms and should not be interpreted as being limited to the embodiments described herein. It should be understood that these embodiments are provided to make the disclosure of the present utility model thorough and complete, and to fully convey the concepts of these exemplary embodiments to those of ordinary skill in the art.

[0095] Figure 1 to Figure 2 A cam shaft 11 is shown. The cam shaft 11 provided in this solution includes a shaft body 10 and an oil-gas separator 20. The two ends of the shaft body 10 are connected with a front cover 60 and a rear cover 50.

[0096] The shaft body 10 is constructed as a tubular structure, and its interior is hollow to form a receiving chamber 101. The receiving chamber 101 is a cylindrical cavity extending along the shaft body 10.

[0097] The shaft body 10 has an inlet 102 and an outlet 103 for the oil-gas mixture 71. The inlet 102 and the outlet 103 of the oil-gas mixture 71 are both connected to the accommodating chamber 101, and the inlet 102 and the outlet 103 of the oil-gas mixture 71 are spaced apart along the axial direction of the shaft body 10. An oil-gas passage is formed between the inlet 102 and the outlet 103 of the oil-gas mixture 71. After entering the shaft body 10, the oil-gas mixture 71 needs to pass through a longer path before being discharged from the outlet 103, and the oil-gas mixture 71 has more opportunities to separate during the flow process.

[0098] Optionally, the shaft body 10 has a first end 1001 and a second end 1002 of the shaft body that are arranged oppositely in the axial direction. Optionally, the inlet 102 of the oil-gas mixture 71 is arranged on the side wall of the shaft body 10, and the outlet 103 is arranged at the second end 1002 of the shaft body. The inlet 102 of the oil-gas mixture 71 is connected in the radial direction, and the outlet 103 is connected in the axial direction.

[0099] An oil-gas separator 20 is provided inside the shaft body 10. Specifically, the oil-gas separator 20 is installed in the accommodating cavity. The oil-gas separator 20 is generally a columnar structure extending along the shaft body 10. The oil-gas separator 20 divides the accommodating cavity 101 into a first accommodating cavity 1011 and a second accommodating cavity 1012. The oil-gas separator is provided with a separation channel, and the separation channel connects the first accommodating cavity 1011 and the second accommodating cavity 1012.

[0100] like Figure 3 to Figure 4 As shown, the oil-gas separator 20 includes a housing 21 and a separator 22. Optionally, the housing 21 constitutes a part of a separation channel. The separator 22 is located in the separation channel.

[0101] The housing 21 is constructed as a tubular spiral rod structure with one end open, and its interior is hollow to form a separation chamber 211. The housing 21 is provided with a separation inlet 212 and a separation outlet 213. The separation inlet 212 connects the separation chamber 211 with the first accommodating chamber 1011, and the separation outlet 213 connects the separation chamber 211 with the second accommodating chamber 1012. The separation element 22 is provided in the separation chamber 211.

[0102] The outer wall of the shell 21 is provided with a spiral blade 214. The spiral blade 214 extends in a spiral shape along the axial direction of the shell 21. The shell 21 rotates with the rotation of the cam shaft 11, and the spiral blade 214 guides the oil-gas mixture 71 to form a strong rotating flow in the accommodating chamber 101, thereby realizing the preliminary separation of the oil state and the gas state. Separation grooves 2141 are correspondingly formed between adjacent blades of the spiral blade 214. That is, the separation groove 2141 is formed between the spiral blade 214 and the outer wall of the shell 21. Due to the spiral shape of the blade, the separation groove 2141 also presents a spiral shape. The oil-gas mixture 71 flows along the separation groove 2141 when the shell 21 rotates. Optionally, the separation groove 2141 constitutes a part of the separation channel.

[0103] Optionally, the separation inlet 212 is disposed in the separation tank 2141. Specifically, the separation inlet 212 is located at the bottom of the separation tank 2141, that is, the separation inlet 212 is opened on the outer wall of the housing 21 to connect the separation tank 2141 with the separation chamber 211. After preliminary separation, the oil-gas mixture 71 enters the separation chamber 211 through the separation inlet 212.

[0104] Optionally, the separation inlet 212 is provided in a plurality along the extension direction of the separation tank 2141. Optionally, the separation inlet 212 is evenly or specifically distributed in the extension direction of the separation tank 2141 according to requirements, ensuring that the oil-gas mixture 71 can be introduced into the separation chamber 211 at different positions, thereby improving the separation efficiency and separation effect.

[0105] Optionally, the housing 21 has a first housing end 2101 and a second housing end 2102 that are arranged in opposite directions along the axial direction. The first housing end 2101 faces the separation inlet 212, and the second housing end 2102 faces the outlet 103. Optionally, the separation inlet 212 is opened in the tube wall of the spiral tube, and the separation outlet 213 is arranged at the second end 1002 of the shaft body. Optionally, the separation inlet 212 is penetrated in the radial direction, and the separation outlet 213 is penetrated in the axial direction.

[0106] The housing 21 is provided with a fixing portion 216. The fixing portion 216 is arranged at the second end portion 2102 of the housing. The fixing portion 216 is sealed and connected to the inner wall of the shaft body 10. Specifically, the radial dimension of the fixing portion 216 is greater than the radial dimension of the body of the housing 21, so that the body of the housing 21 is spaced apart from the inner wall of the shaft body 10, and the fixing portion 216 abuts against the inner wall of the shaft body 10. Along the flow direction of the fluid, the fixing portion 216 is located downstream of the spiral blade 214. Optionally, the outer diameter of the fixing portion 216 is substantially equal to the inner diameter of the housing 21. The fixing portion 216 is sealed and connected to the inner wall of the shaft body 10 to ensure that the fluid does not leak from the gap between the fixing portion 216 and the inner wall. Due to the provision of the fixing portion 216, it is ensured that the oil-gas mixture 71 enters the separation chamber 211 upstream of the fixing portion 216, which optimizes the flow path of the oil-gas mixture 71 and improves the separation efficiency.

[0107] Optionally, the fixing portion 216 is provided with a first fixing hole 2161, and the shaft body 10 is provided with a second fixing hole 104, and the first fixing hole 2161 and the second fixing hole 104 are arranged opposite to each other. Optionally, the cam shaft 11 further includes a fastener 30, and the fastener 30 is inserted into the first fixing hole 2161 and the second fixing hole 104 to fix the oil-gas separator 20 to the shaft body 10. When installing the oil-gas separator 20, the first fixing hole 2161 and the second fixing hole 104 are precisely aligned, and the fastener 30 passes through the first fixing hole 2161 and the second fixing hole 104 to firmly fix the oil-gas separator 20 on the shaft body 10. Optionally, the fastener 30 can be a plug, a bolt or a screw. The fastener 30 is sealed and connected to the first fixing hole 2161 and the second fixing hole 104 respectively. The fastener 30 can form an effective seal between the first fixing hole 2161 and the second fixing hole 104 to prevent the oil-gas mixture 71 from leaking during the separation process, thereby improving the separation efficiency.

[0108] The shell 21 is provided with a guide protrusion 215. The guide protrusion 215 is arranged at the first end 2101 of the shell. The guide protrusion 215 is inclined from the middle of the shell 21 to the periphery of the shell 21 along the axial direction. Optionally, the guide protrusion 215 is constructed as a revolving body structure. The outer side wall of the guide protrusion 215 is arc-shaped. As can be seen from the above, the first end 2101 of the shell is facing the mixture inlet, that is, the guide protrusion 215 is arranged toward the mixture inlet. When the oil-gas mixture 71 enters the shell 21, it first encounters the guide protrusion 215, and the guide protrusion 215 can effectively guide the oil-gas mixture 71 to flow into the separation groove 2141.

[0109] A separator 22 is provided inside the shell 21. The separator 22 is provided in the separation chamber 211, and the separator 22 is located between the separation inlet 212 and the separation outlet 213, and the separator 22 at least partially covers the separation inlet 212. Through the provision of the separator 22, when the oil-gas mixture 71 enters the separation chamber 211, the oil and gas are further separated. The separator 22 has a good adsorption capacity for small-size oil droplets, and can effectively collect oily substances to improve the efficiency of oil-gas separation. Optionally, the separator 22 is laid on the inner wall of the shell 21 to cover the separation inlet 212. Optionally, the separator 22 is annular, and the separator 22 fits the inner wall of the separation chamber 211.

[0110] According to the above, the oil-gas mixture 71 enters the accommodating chamber 101 through the mixture inlet. Under the guidance of the guide protrusion 215, it flows to the separation groove 2141 to form a spirally rotating fluid. The fluid in the separation groove 2141 enters the separation chamber 211 through the separation inlet 212. When the oil-gas mixture 71 enters the separation chamber 211 from the separation inlet 212, it will pass through the separation member 22. The gas and oil in the oil-gas mixture 71 are separated. Under the action of centrifugal force, the oil is thrown to the outer wall, and the separated gas 72 flows along the center. At the same time, the oil is pushed by the separated gas 72 to flow out to the accommodating chamber 101 through the separation outlet 213 of the second end 2102 of the shell, and then further flows to the second end 1002 of the shaft body.

[0111] When the engine is running, the cam 11 rotates, and the blow-by gas in the crankcase enters the accommodating chamber 101 through the oil-gas mixture 71 inlet 102 on the shaft body 10. Figure 1 , Figure 2 and Figure 5 As shown, the shaft body 10 is provided with an oil retaining ring 40. The orthographic projection of the oil retaining ring 40 on the shaft body 10 covers the inlet 102 of the oil-gas mixture 71, and the oil retaining ring 40 is spaced from the inlet 102 of the oil-gas mixture 71 in the radial direction. Therefore, the engine oil can be prevented from being thrown directly into the inlet 102 of the oil-gas mixture 71, the oil content in the blowby gas is prevented from increasing, and the burden on the oil-gas separator 20 is reduced.

[0112] As can be seen from the above, the oil separated by the oil-gas separator 20 and the separated gas 72 are discharged through the outlet 103 of the second end 1002 of the shaft body. Figure 1 to Figure 2 , Figure 6-Figure 7 As shown, the second end 1002 of the shaft body is provided with an air outlet channel 501 and an oil return channel 502 spaced apart from each other, and both the air outlet channel 501 and the oil return channel 502 are connected to the accommodating chamber 101. Specifically, the second end 1002 of the shaft body is connected with a rear end cover 50, which is fixed in the engine and is rotatably connected to the shaft body 10.

[0113] The rear end cover 50 includes an inner tube portion 51, an outer tube portion 52 and a rear end portion 53. The inner tube portion 51 extends in the axial direction and extends into the shaft body 10. The outer tube portion 52 extends in the axial direction, and at least part of the inner tube portion 51 and the outer tube portion 52 are spaced apart in the radial direction, and the outer tube portion 52 is sleeved outside the shaft body 10. The inner tube portion 51 and the outer tube portion 52 are both connected to the rear end portion 53, and the rear end portion 53 includes an air outlet pipe 531 and an oil return pipe 532 spaced apart. The inner tube portion 51 is connected to the air outlet pipe 531 to form an air outlet channel 501. The inner tube portion 51 extends into the interior of the shaft body 10 to facilitate the extraction of the separated gas 72. The outer tube portion 52 is connected to the oil return pipe 532 to form an oil return channel 502. The outer tube portion 52 is used to be connected to the shaft body 10, and the interval between the outer tube portion 52 and the inner tube portion 51 is used to facilitate the extraction of the oil droplets 73. At the same time, since the outer tube is arranged outside the inner tube, it is adapted to the flow paths of the separated oil droplets 73 and the separated gas 72, thereby optimizing the flow path after the oil and gas separation.

[0114] At least part of the inner tube 51 is spaced apart from the shaft body 10 in the radial direction, and the accommodating chamber 101 is connected to the oil return passage 502 through the space. Thus, the space between the accommodating chamber 101 and the outer wall of the inner tube 51, and the space between the inner tube 51 and the outer tube 52 and the rear end 53 form the oil return passage 502.

[0115] The oil droplets 73 flowing out through the oil return channel 502 eventually return to the oil pan and are recycled. The separated gas 72 flowing out through the gas outlet channel 501 enters the channel provided with the PCV valve and eventually enters the intake system.

[0116] Optionally, the outlet 103 end of the air outlet channel 501 faces upwards. The outlet 103 end of the oil return channel 502 faces downwards. Optionally, the air outlet pipe 531 is located above the oil return pipe 532.

[0117] Optionally, an oil seal 54 is provided between the outer tube 52 and the shaft body 10. The oil seal 54 ensures that the seal is maintained during the rotation of the shaft body to prevent oil and gas leakage. This sealing design improves the reliability and safety of the entire system.

[0118] like Figure 1 to Figure 2 , Figure 6-Figure 7 As shown, optionally, the first end 1001 of the shaft body is connected with a front end cover 60. The front end cover 60 is provided with a signal disk 61. After the signal disk 61 is arranged, the cam shaft 11 can be applied to an engine with VVT to improve the engine efficiency.

[0119] Optionally, the signal disk 61 is also knurled and pressed onto the front end cover 60. Optionally, the front end cover 60 is hollow cast, and the signal disk 61 is pre-embedded during casting.

[0120] In this embodiment, the separation element 22 is a felt material. The fiber structure of the felt material makes it have a strong oil absorption capacity, and can quickly absorb small-size oil droplets entering the separation chamber 211.

[0121] The utility model also provides an engine, including the above-mentioned cam shaft 11, which does not increase the height of the engine, does not increase the complexity of the engine cylinder head cover, and significantly improves the oil-gas separation efficiency and engine performance, and reduces emission pollution.

[0122] The utility model also provides a vehicle, comprising the above engine, which improves the fuel economy of the vehicle and reduces the daily use cost through efficient oil and gas separation.

[0123] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art in the technical field of the present invention. The terms used herein are only for describing specific implementation purposes and are not intended to limit the present invention. Terms such as "setting" appearing in this article may indicate that one component is directly attached to another component, or that one component is attached to another component through an intermediate. Features described in this article in one embodiment may be applied to another embodiment alone or in combination with other features, unless the feature is not applicable in the other embodiment or otherwise specified.

[0124] The utility model has been described through the above embodiments, but it should be understood that the above embodiments are only for the purpose of example and description, and are not intended to limit the utility model to the described embodiments. It can be understood by those skilled in the art that more variations and modifications can be made according to the teachings of the utility model, and these variations and modifications all fall within the scope of the protection claimed by the utility model.

Claims

1. A camshaft, characterized in that: include: A shaft body, wherein the shaft body is provided with a receiving cavity; and An oil-gas separator is arranged in the accommodating chamber to divide the accommodating chamber into a first accommodating chamber and a second accommodating chamber. The oil-gas separator is provided with a separation channel, which connects the first accommodating chamber and the second accommodating chamber. A separation piece is provided in the separation channel.

2. The camshaft according to claim 1, characterized in that The oil-gas separator comprises: The separation channel is arranged in the shell, the separation channel includes a separation chamber, a separation inlet and a separation outlet, the separation inlet connects the separation chamber with the first accommodating chamber, the separation outlet connects the separation chamber with the second accommodating chamber, and the separation element is arranged in the separation chamber.

3. The camshaft according to claim 2, characterized in that: The outer wall of the shell is provided with a spiral blade, and the spiral blade extends along the circumference of the shell to form a separation groove. At least part of the separation groove extends in a spiral shape along the axial direction of the shell. The separation inlet is arranged in the separation groove.

4. The camshaft according to claim 3, characterized in that: The separation inlet is arranged in plurality along the extending direction of the separation groove.

5. The camshaft according to claim 3, characterized in that: The housing is provided with a fixing portion, the fixing portion is sealedly connected to the inner wall of the shaft body, and along the flow direction of the fluid, the fixing portion is located downstream of the spiral blade.

6. The camshaft according to any one of claims 2 to 5, characterized in that The housing is provided with a first fixing hole, and the shaft body is provided with a second fixing hole, and the first fixing hole and the second fixing hole are arranged opposite to each other; It also includes a fastener, which is inserted into the first fixing hole and the second fixing hole to fix the oil-gas separator to the shaft body.

7. The camshaft according to claim 2, characterized in that: The shaft body is provided with an oil-gas mixture inlet and an outlet, the oil-gas mixture inlet is communicated with the first accommodating cavity, the outlet is communicated with the second accommodating cavity, and the oil-gas mixture inlet and the outlet are spaced apart along the axial direction of the shaft body.

8. The camshaft according to claim 7, characterized in that The shell has an end portion facing the mixture inlet and is provided with a guide protrusion, and the guide protrusion is inclined from the middle portion of the shell to the periphery of the shell along the axial direction.

9. The camshaft according to claim 7, characterized in that: The separation outlet is disposed at an end of the housing toward the outlet.

10. The camshaft according to any one of claims 2 to 5 and 7 to 9, characterized in that: The separation member at least partially covers the separation inlet.

11. The camshaft according to claim 10, characterized in that The separation piece is annular and fits the inner wall of the separation chamber.

12. The camshaft according to claim 7, characterized in that The shaft body has a first end portion and a second end portion of the shaft body which are arranged opposite to each other along the axial direction thereof, and the oil-gas mixture inlet is located between the first end portion and the second end portion of the shaft body.

13. The camshaft according to claim 12, characterized in that An oil retaining ring is disposed on the outer sleeve of the shaft body. The oil retaining ring covers the oil-gas mixture inlet in the orthographic projection of the shaft body, and the oil retaining ring is spaced apart from the oil-gas mixture inlet in the radial direction.

14. The camshaft according to claim 12, characterized in that A rear end cover is disposed at the second end of the shaft body, and the rear end cover is rotatably connected to the shaft body.

15. The camshaft according to claim 14, characterized in that The rear end cover is provided with an air outlet channel and an oil return channel which are spaced apart from each other, and both the air outlet channel and the oil return channel are communicated with the accommodating cavity.

16. The camshaft according to claim 15, characterized in that The rear end cover comprises: An inner tube portion, the inner tube portion extending along the axial direction, and the inner tube portion extending into the shaft body; an outer tube portion, the outer tube portion extending along the axial direction, at least a portion of the inner tube portion and the outer tube portion being spaced apart from each other in a radial direction, and the outer tube portion being sleeved outside the shaft body; and The rear end portion, the inner tube portion and the outer tube portion are both connected to the rear end portion, and the rear end portion is provided with an air outlet pipe and an oil return pipe spaced apart from each other; wherein, The inner tube portion is communicated with the air outlet pipe to form the air outlet passage; The outer tube portion is communicated with the oil return pipe to form the oil return passage.

17. The camshaft according to claim 16, characterized in that At least a portion of the inner tube portion is spaced apart from the shaft body in a radial direction, and the accommodating cavity is connected to the oil return channel through the space.

18. The camshaft according to claim 17, characterized in that An oil seal is provided between the outer tube portion and the shaft body.

19. The camshaft according to claim 12, characterized in that The first end of the shaft body is provided with a front end cover, and the front end cover is provided with a signal disk.

20. The camshaft according to claim 1, characterized in that The shaft body is hollow inside to form the accommodating cavity; and / or The separating piece is felt.

21. An engine, characterized in that: Comprising a camshaft according to any one of claims 1 to 20.

22. A vehicle, characterized in that: Comprising an engine according to claim 21.

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