Steam fog generating device

Abstract

The utility model relates to a vapor fog generating device which comprises a smoke cartridge and an auxiliary oil cup, the smoke cartridge comprises a main oil storage component and an atomizing core, and the main oil storage component is provided with a main oil storage cavity. The auxiliary tar cup comprises an auxiliary tar storage part, a tar control switch and a first magnetic attraction part, the auxiliary tar storage part is provided with an auxiliary tar storage cavity located above the main tar storage cavity, the auxiliary tar storage cavity is used for storing second tobacco tar, and a tar guide cavity is formed between the main tar storage cavity and the auxiliary tar storage cavity. And the oil control switch is at least partially inserted into the oil guide cavity. The first magnetic attraction piece is movably arranged on the outer wall face of the auxiliary oil storage component. When tobacco tar needs to be added, the mist generating device is erected, the first magnetic attraction piece and the tar control switch are arranged in a position corresponding mode, the first magnetic attraction piece and the tar control switch are magnetically attracted, the tar guide cavity is opened by the tar control switch, and second tobacco tar in the auxiliary tar storage cavity flows into the main tar storage cavity through the tar guide cavity under the action of gravity. The electronic cigarette is environment-friendly and convenient for a user to use, and tobacco tar leakage and tobacco tar suction can be better avoided.

Description

Technical Field

[0001] This utility model relates to the field of vapor generation technology, and more specifically, to a vapor generation device. Background Technology

[0002] It is a widely accepted fact that smoking is harmful to health, yet there are still hundreds of millions of smokers worldwide, and this number is growing, demanding serious attention. To mitigate this harm, aerosol generators have emerged. Existing aerosol generators typically include a cartridge and a power supply component. The cartridge includes an e-liquid reservoir and an atomizer coil. The reservoir has a storage chamber for storing e-liquid. The atomizer coil, located within the reservoir, atomizes the e-liquid, which surrounds its outer periphery. In existing aerosol generators, to prevent the e-liquid from oxidizing due to prolonged heating by the atomizer coil, the reservoir is relatively small, resulting in a limited amount of e-liquid. To address these technical issues, those skilled in the art have developed a method where the cartridge and power supply component are detachably connected, allowing for easy replacement when the e-liquid in the reservoir is depleted. However, frequent cartridge replacement is not only inconvenient for users but also leads to excessive cartridge disposal, which is environmentally unfriendly. Utility Model Content

[0003] The purpose of this invention is to provide an environmentally friendly vapor generator that avoids oil leakage and is easy for users to use.

[0004] The present invention solves the above-mentioned problems by constructing a vapor-generating device, which includes a cartridge and a secondary oil cup. The cartridge includes a main oil storage component and an atomizing core. The main oil storage component is provided with a main oil storage chamber for storing a first e-liquid, and the atomizing core is at least partially located within the main oil storage chamber. The secondary oil cup includes a secondary oil storage component, an oil control switch, and a first magnetic suction element. The secondary oil storage component is provided with a secondary oil storage chamber located above the main oil storage chamber for storing a second e-liquid. An oil guide chamber is provided between the main oil storage chamber and the secondary oil storage chamber, and the oil guide chamber communicates with both the main oil storage chamber and the secondary oil storage chamber. The oil control switch is at least partially inserted into the oil guide chamber.

[0005] The first magnetic suction element is movably disposed on the outer wall surface of the secondary oil storage component; when the first magnetic suction element is in the upright position and is offset from the oil control switch, the oil control switch closes the oil guiding cavity under the action of gravity; when the first magnetic suction element is in the upright position and is positioned corresponding to the oil control switch, the first magnetic suction element and the oil control switch are magnetically attracted, the oil control switch opens the oil guiding cavity, and the second e-liquid in the secondary oil storage cavity flows into the main oil storage cavity through the oil guiding cavity due to gravity.

[0006] In one embodiment, the oil control switch includes an oil blocking component and a control rod. The oil blocking component is connected to the oil storage chamber, and the oil blocking component is provided with an oil guide hole, which communicates with the oil guide chamber and the secondary oil storage chamber. The control rod is movably disposed within the secondary oil storage component.

[0007] When the device is upright and the first magnetic attractor is offset from the control rod, the control rod covers the oil guide hole under the action of gravity to close the oil guide cavity; when the device is upright and the first magnetic attractor is positioned corresponding to the control rod, the first magnetic attractor and the control rod are magnetically attracted, the control rod is spaced apart from the oil guide hole to open the oil guide cavity, and the second e-liquid in the secondary oil storage cavity flows into the main oil storage cavity through the oil guide cavity due to gravity.

[0008] In one embodiment, the oil-blocking component is further provided with a guide portion, which is movably connected to the control lever.

[0009] In one embodiment, the guide portion is a guide hole, and the control rod is at least partially movably inserted into the guide hole.

[0010] In one embodiment, the control lever includes a lever body and a limiting part, the lever body being movably connected to the oil blocking member; the limiting part is located on the side of the lever body and connected to the lever body; in the upright state and when the first magnetic suction member is offset from the lever body, the limiting part abuts against the end face of the oil blocking member and covers the oil guide hole to close the oil guide cavity.

[0011] In one embodiment, the oil control switch further includes a second magnetic element located within the secondary oil reservoir and magnetically attracted to the control lever to prevent the control lever from moving away from the oil blocking element.

[0012] In one embodiment, the oil control switch further includes a counterweight connected to the control lever.

[0013] In one embodiment, the oil control switch further includes a limiting member and an elastic sealing block. The limiting member is at least partially located within the oil guiding cavity and has a first oil drain hole. The elastic sealing block is installed at the limiting member and has a second oil drain hole that communicates with the first oil drain hole. The oil guiding hole is located between the secondary oil storage cavity and the second oil drain hole. In the upright state and when the first magnetic suction member is offset from the control rod, the control rod covers the second oil drain hole to prevent the e-liquid in the oil guiding cavity from flowing into the main oil storage cavity.

[0014] In one embodiment, the secondary oil storage component includes a first receiving shell and a first sealing cap. The first receiving shell is provided with the secondary oil storage cavity, which is connected to a first end face of the first receiving shell. The first sealing cap covers the opening of the secondary oil storage cavity. The first sealing cap is provided with the oil guiding cavity, which extends through the two opposite ends of the first sealing cap.

[0015] In one embodiment, the main oil storage component includes a second receiving shell and a second sealing cap. The second receiving shell is provided with a connecting ring portion and the main oil storage cavity. The connecting ring portion is located at the first end of the second receiving shell and is inserted into and connected to the oil guiding cavity. The main oil storage cavity communicates with the second end face of the second receiving shell. The second sealing cap is provided at the opening of the main oil storage cavity. The first end of the second receiving shell and the second end of the second receiving shell are positioned opposite each other.

[0016] The beneficial effects of this utility model are as follows:

[0017] This invention utilizes a clever combination of a cartridge and an auxiliary e-liquid cup. The cartridge includes a main e-liquid storage component with a main e-liquid chamber. The auxiliary e-liquid cup includes an auxiliary e-liquid storage component, an e-liquid control switch, and a first magnetic wick. The auxiliary e-liquid storage component has a clearance hole and an auxiliary e-liquid chamber located above the main e-liquid chamber. An e-liquid guide chamber is provided between the main and auxiliary e-liquid chambers. The first magnetic wick is movably mounted on the outer wall of the auxiliary e-liquid storage component. When the e-liquid in the main e-liquid chamber is depleted, the vapor generator is set to an upright position, and the first magnetic wick is positioned corresponding to the e-liquid control switch. The magnetic attraction between the first magnetic wick and the control switch opens the e-liquid guide chamber, allowing the second e-liquid in the auxiliary e-liquid chamber to flow into the main e-liquid chamber due to gravity. Therefore, it is not only environmentally friendly but also convenient for users. Furthermore, it does not require inversion and there are no holes between the control switch and the first magnetic wick, thus effectively preventing e-liquid leakage and user inhalation of e-liquid. Attached Figure Description

[0018] The present invention will now be described in conjunction with the accompanying drawings, wherein:

[0019] Figure 1 This is a perspective view of one embodiment of the vapor generation device of this utility model;

[0020] Figure 2 for Figure 1 The figure shown is a cross-sectional view of the vapor generator of this utility model when the oil guide chamber is open.

[0021] Figure 3 for Figure 1 The figure shows a cross-sectional view of the vapor generator of this utility model when the oil guide chamber is closed;

[0022] Figure 4 for Figure 2 An enlarged view of region A shown. Detailed Implementation

[0023] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0024] Please see Figures 1 to 4 This utility model provides an atomizing device, which includes a cartridge 1, a secondary oil cup 2, and a power supply assembly 3. The cartridge 1 includes a main oil storage component 11 and an atomizing core 12. The main oil storage component 11 includes a second receiving shell 111, a second sealing cap 112, a vent pipe 113, and an oil-absorbing cotton column 114. The second receiving shell 111 is provided with a connecting ring portion 1111 and a main oil storage chamber 1112. The connecting ring portion 1111 is located at the first end of the second receiving shell 111. The main oil storage chamber 1112 is used to store the first e-liquid and is connected to the second end face of the second receiving shell 111. The first end of the second receiving shell 111 and the second end of the second receiving shell 111 are positioned opposite each other.

[0025] The second sealing cap 112 is placed over the opening of the main oil storage chamber 1112 and extends into the main oil storage chamber 1112 to seal the opening of the main oil storage chamber 1112. One end of the vent pipe 113 is connected to the second sealing cap 112, and the second end of the vent pipe 113 passes through the second receiving shell 111 and extends into the auxiliary oil cup 2. The oil-absorbing cotton column 114 is located in the main oil storage chamber 1112 and is used to absorb the first e-liquid.

[0026] The atomizing core 12 is located within the main oil reservoir 1112 and installed at the air vent 113. It includes a porous absorber 121 and a heating element 122. The porous absorber 121 is installed at the air vent 113 and extends beyond it to absorb e-liquid within the main oil reservoir 1112. The absorbent cotton column 114 is in close contact with the porous absorber 121, thus effectively transferring e-liquid. The heating element 122 is in contact with the porous absorber 121 and atomizes the e-liquid within it. The vapor formed by the atomized e-liquid is discharged from the air vent 113. It is understood that the porous absorber 121 can be made of porous materials such as fiber or ceramic, and the heating element 122 can be a heating wire or a heating plate.

[0027] The secondary oil cup 2 includes a secondary oil storage component 21, an oil control switch 22, and a first magnetic suction component 23. The secondary oil storage component 21 includes a first receiving shell 211, a first sealing cap 212, and a sealing seat 213. The first receiving shell 211 is provided with a mouthpiece 2111, a first slot 2112, a second slot 2113, and a secondary oil storage chamber 2114. The mouthpiece 2111 is located at the end of the first receiving shell 211 facing away from the cartridge 1, and the air pipe 113 is connected to the mouthpiece 2111. When the user smokes, the vapor formed by the atomizing coil 12 atomizing the e-liquid passes through the air pipe 113 and is then discharged from the mouthpiece 2111. The first slot 2112 is located on the inner wall of the first receiving shell 211 and is connected to the secondary oil storage chamber 2114. The second slot 2113 is located on the end face of the first receiving shell 211 facing away from the cartridge 1.

[0028] In the upright position, the secondary oil storage chamber 2114 is located above the main oil storage chamber 1112. The secondary oil storage chamber 2114 is connected to the first end face of the first receiving shell 211. The first sealing cap 212 is placed over the opening of the secondary oil storage chamber 2114. The secondary oil storage chamber 2114 is used to store the second e-liquid. The second e-liquid can be the same as or different from the first e-liquid, and no specific limitation is made here. The first sealing cap 212 is provided with an oil guiding chamber 2121, which is used to guide the e-liquid in the secondary oil storage chamber 2114 into the main oil storage chamber 1112. The oil guiding chamber 2121 passes through the two opposite ends of the first sealing cap 212. The connecting ring 1111 is inserted into the oil guiding chamber 2121 and connected to the oil guiding chamber 2121, thus not only preventing oil leakage, but also making the connection between the cartridge 1 and the secondary oil cup 2 more reliable. An oil delivery hole 2122 is provided on the wall of the oil guide cavity 2121, and the oil delivery hole 2122 is connected to the auxiliary oil storage cavity 2114.

[0029] The sealing seat 213 is located within the secondary oil storage chamber 2114 and is used to seal the gap between the first sealing cover 212 and the first receiving shell 211. The sealing seat 213 can be made of materials such as silicone or rubber. It is understood that as long as an oil guiding chamber 2121 is provided between the main oil storage chamber 1112 and the secondary oil storage chamber 2114, its structure and position are not specifically limited here. For example, the oil guiding chamber 2121 can be located on the cavity wall of the main oil storage chamber 1112.

[0030] The oil control switch 22 is partially inserted into the oil guiding cavity 2121. It includes an oil blocking element 221, a control rod 222, a second magnetic element 223, and a counterweight 224. One end of the oil blocking element 221 is located within the secondary oil storage cavity 2114 and is connected to the cavity wall of the secondary oil storage cavity 2114. The other end of the oil blocking element 221 is inserted into the oil guiding cavity 2121. The oil blocking element 221 is provided with an oil guiding hole 2211 and a guide portion 2212. One end of the oil guiding hole 2211 communicates with the secondary oil storage cavity 2114, and the other end of the oil guiding hole 2211 communicates with the oil guiding cavity 2121 through the oil delivery hole 2122. The guide portion 2212 is movably connected to the control rod 222 to guide the control rod 222. In this embodiment, the guide portion 2212 is a guide hole, one end of the control rod 222 is movably inserted into the guide hole, and the other end of the control rod 222 is movably inserted into the first slot 2112, thus better avoiding deflection and improving sealing performance.

[0031] Specifically, the control lever 222 includes a lever body 2221 and a limiting part 2222. One end of the lever body 2221 is movably inserted into the guide hole to be movably connected to the oil blocking member 221, and the other end of the lever body 2221 is movably inserted into the first slot 2112. The limiting part 2222 is located on the side of the lever body 2221 and is connected to the lever body 2221. The limiting part 2222 can be in the form of a ring or a plate structure, etc. In the upright state and when the first magnetic suction member 23 is offset from the lever body 2221, the limiting part 2222 abuts against the end face of the oil blocking member 221 and covers the oil guide hole 2211 to close the oil guide cavity 2121.

[0032] The second magnetic element 223 is located within the auxiliary oil reservoir 21 and is magnetically attracted to the control lever 222 to prevent the control lever 222 from moving away from the oil blocking element 221. Specifically, the second magnetic element 223 is a ring-shaped magnet, which is fixed to the cavity wall of the oil guiding chamber 2121 and corresponds to the position of the limiting part 2222. The counterweight 224 is connected to the control lever 222 to increase the weight of the oil control switch 22 when it is upright, thereby improving the sealing performance.

[0033] One end of the first magnetic chuck 23 is inserted into and movably connected to the second slot 2113. Under the action of external force, the first magnetic chuck 23 can move along the guide of the second slot 2113, that is, the first magnetic chuck 23 is movably disposed on the outer wall surface of the auxiliary oil reservoir 21. When the first magnetic chuck 23 is located at the center line of the control lever 222, the first magnetic chuck 23 is positioned corresponding to the oil control switch 22. When the orthographic projection of the first magnetic chuck 23 onto the plane containing the upper end surface of the control lever 222 is spaced apart from the control lever 222, the first magnetic chuck 23 is offset from the oil control switch 22.

[0034] In other words, when the first magnetic suction member 23 is positioned off-center from the control rod 222, the control rod 222 covers the oil guide hole 2211 under the action of gravity, thereby closing the oil guide cavity 2121. When the first magnetic suction member 23 is positioned in the same position as the control rod 222, the first magnetic suction member 23 and the control rod 222 are magnetically attracted to each other, and the control rod 222 is spaced apart from the oil guide hole 2211, thus opening the oil guide cavity 2121. The second e-liquid in the secondary oil storage cavity 2114 flows into the main oil storage cavity 1112 through the oil guide cavity 2121 due to gravity.

[0035] Preferably, the oil control switch 22 further includes a limiting member 225 and an elastic sealing block 226. The limiting member 225 is located inside the oil guiding cavity 2121 and abuts against the end face of the connecting ring portion 1111, thus the limiting member 225 is reliably fixed and not easily detached. The limiting member 225 is provided with a first oil drain hole 2251, which communicates with the main oil storage cavity 1112. The elastic sealing block 226 is installed at the end face of the limiting member 225 and is provided with a second oil drain hole 2261, which communicates with the first oil drain hole 2251. The oil guiding hole 2211 is located between the secondary oil storage cavity 2114 and the second oil drain hole 2261. When the first magnetic suction member 23 is positioned off-center from the control rod 222, the control rod 222 covers the second oil drain hole 2261 to prevent the e-liquid in the oil guide cavity 2121 from flowing into the main oil storage cavity 1112. This structure effectively prevents e-liquid leakage and improves sealing performance.

[0036] The power supply assembly 3 includes a connecting frame 31, a third receiving shell 32, a battery 33, and a control board 34. The first end of the connecting frame 31 is inserted into the main oil storage chamber 1112 and connected to the second sealing cover 112. The second end of the connecting frame 31 is connected to the third receiving shell 32. The battery 33 and the control board 34 are both located within the third receiving shell 32. The control board 34 is electrically connected to the battery 33 and the heating element 122 of the atomizing core 12. The control board 34 is equipped with a control circuit. When the user smokes, the control circuit controls the battery 33 to supply power to the heating element 122 of the atomizing core 12 to atomize the e-liquid.

[0037] The principle of this invention is as follows: When the device is upright and the first magnetic suction member 23 is offset from the oil control switch 22, the oil control switch 22, under the action of gravity, causes the limiting part 2222 to cover the oil guide hole 2211, thereby closing the oil guide cavity 2121. When the e-liquid in the main oil storage cavity 1112 is exhausted, the vapor generator is set to the upright position, and the first magnetic suction member 23 is moved to the position corresponding to the oil control switch 22. At this time, the first magnetic suction member 23 and the oil control switch 22 are magnetically attracted, and the oil control switch 22 moves upward to open the oil guide cavity 2121. The second e-liquid in the secondary oil storage cavity 2114 flows into the main oil storage cavity 1112 under the action of gravity through the oil guide hole 2211, the oil guide cavity 2121, the second oil drain hole 2261, and the first oil drain hole 2251. Since the first magnetic suction member 23 and the oil control switch 22 are isolated from each other, e-liquid leakage can be avoided.

[0038] In summary, this utility model achieves its goal through the ingenious combination of the e-cigarette cartridge 1 and the auxiliary oil cup 2. The e-cigarette cartridge 1 includes a main oil storage component 11, which is provided with a main oil storage cavity 1112. The auxiliary oil cup 2 includes an auxiliary oil storage component 21, an oil control switch 22, and a first magnetic suction component 23. The auxiliary oil storage component 21 is provided with a clearance hole and an auxiliary oil storage cavity 2114 located above the main oil storage cavity 1112. An oil guiding cavity 2121 is provided between the main oil storage cavity 1112 and the auxiliary oil storage cavity 2114. The first magnetic suction component 23 is movably disposed on the outer wall surface of the auxiliary oil storage component 21. When the e-liquid in the main oil reservoir 1112 is depleted, the vapor generator is set to an upright position, and the first magnetic suction member 23 is positioned corresponding to the oil control switch 22. The first magnetic suction member 23 and the oil control switch 22 are magnetically attracted, causing the oil control switch 22 to open the oil guiding chamber 2121. This allows the second e-liquid in the secondary oil reservoir 2114 to flow into the main oil reservoir 1112 due to gravity. Therefore, it is not only environmentally friendly but also convenient for users. Furthermore, it does not require inversion and there are no holes between the oil control switch 22 and the first magnetic suction member 23, thus effectively preventing e-liquid leakage and user inhalation of e-liquid.

[0039] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0040] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A vapor-generating device, characterized in that, The device includes a cartridge and a secondary e-liquid cup. The cartridge includes a main e-liquid storage component and an atomizing coil. The main e-liquid storage component has a main e-liquid storage chamber for storing a first e-liquid, and the atomizing coil is at least partially located within the main e-liquid storage chamber. The secondary e-liquid cup includes a secondary e-liquid storage component, an e-liquid control switch, and a first magnetic suction element. The secondary e-liquid storage component has a secondary e-liquid storage chamber located above the main e-liquid storage chamber for storing a second e-liquid. An e-liquid guide chamber is provided between the main e-liquid storage chamber and the secondary e-liquid storage chamber, and the e-liquid guide chamber communicates with both the main e-liquid storage chamber and the secondary e-liquid storage chamber. The e-liquid control switch is at least partially inserted into the e-liquid guide chamber. The first magnetic suction element is movably disposed on the outer wall surface of the auxiliary oil storage component; when the first magnetic suction element is in the upright state and is offset from the oil control switch, the oil control switch closes the oil guide cavity under the action of gravity; When the device is upright and the first magnetic suction component is positioned corresponding to the oil control switch, the first magnetic suction component and the oil control switch are magnetically attracted to each other. The oil control switch opens the oil guiding cavity, and the second e-liquid in the secondary oil storage cavity flows into the main oil storage cavity through the oil guiding cavity due to gravity.

2. The vapor generating device according to claim 1, characterized in that, The oil control switch includes an oil blocking component and a control rod. The oil blocking component is connected to the oil storage chamber and is provided with an oil guide hole, which communicates with the oil guide chamber and the secondary oil storage chamber. The control rod is movably disposed within the secondary oil storage component. When the first magnetic attractor is positioned in an upright position and is offset from the control rod, the control rod covers the oil guide hole under the action of gravity to close the oil guide cavity; When the device is upright and the first magnetic attractor is positioned corresponding to the control rod, the first magnetic attractor and the control rod are magnetically attracted to each other. The control rod is spaced apart from the oil guide hole, thus opening the oil guide cavity. The second e-liquid in the secondary oil storage cavity flows into the main oil storage cavity through the oil guide cavity due to gravity.

3. The vapor-generating device according to claim 2, characterized in that, The oil-blocking component is also provided with a guide portion, which is movably connected to the control lever.

4. The vapor-generating device according to claim 3, characterized in that, The guide portion is a guide hole, and the control rod is at least partially movably inserted into the guide hole.

5. The vapor-generating device according to any one of claims 2 to 4, characterized in that, The control lever includes a lever body and a limiting part. The lever body is movably connected to the oil blocking component. The limiting part is located on the side of the lever body and connected to the lever body. In the upright state and when the first magnetic suction component is offset from the lever body, the limiting part abuts against the end face of the oil blocking component and covers the oil guide hole to close the oil guide cavity.

6. The vapor-generating apparatus according to any one of claims 2 to 4, characterized in that, The oil control switch also includes a second magnetic element, which is located inside the auxiliary oil storage component and is magnetically attracted to the control lever to prevent the control lever from moving away from the oil blocking element.

7. The vapor-generating apparatus according to any one of claims 2 to 4, characterized in that, The oil control switch also includes a counterweight, which is connected to the control rod.

8. The vapor-generating device according to any one of claims 2 to 4, characterized in that, The oil control switch also includes a limiting member and an elastic sealing block. The limiting member is at least partially located within the oil guiding cavity and has a first oil drain hole. The elastic sealing block is installed at the limiting member and has a second oil drain hole, which communicates with the first oil drain hole. The oil guiding hole is located between the secondary oil storage cavity and the second oil drain hole. In the upright state and when the first magnetic suction member is offset from the control rod, the control rod covers the second oil drain hole to prevent the e-liquid in the oil guiding cavity from flowing into the main oil storage cavity.

9. The vapor-generating device according to claim 2 or 3, characterized in that, The auxiliary oil storage component includes a first receiving shell and a first sealing cap. The first receiving shell is provided with the auxiliary oil storage cavity, which is connected to the first end face of the first receiving shell. The first sealing cap covers the opening of the auxiliary oil storage cavity. The first sealing cap is provided with the oil guiding cavity, which extends through the two opposite ends of the first sealing cap.

10. The vapor-generating device according to claim 9, characterized in that, The main oil storage component includes a second receiving shell and a second sealing cap. The second receiving shell is provided with a connecting ring portion and the main oil storage cavity. The connecting ring portion is located at the first end of the second receiving shell and is inserted into the oil guiding cavity and connected to the oil guiding cavity. The main oil storage cavity is in communication with the second end face of the second receiving shell. The second sealing cap is provided at the opening of the main oil storage cavity. The first end of the second receiving shell and the second end of the second receiving shell are positioned opposite each other.

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