# US 11,905,958 B2 · Vacuuming device and vacuum apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,905,958 B2 - Document ID: US11905958B2 - Status: Granted - Kind: B2 - Application number: 17/672,634 - Filed: 2022-02-15 - Published: 2022-06-02 - Granted: 2024-02-20 - Earliest claimed: 2017-03-29 - Assignees: Hong Wang - Applicants: Hong Wang - Inventors: Hong Wang; Yusheng Wang - Web page: https://patentgrep.com/patent/US11905958B2 ## CPC - F04C 23/02: Pumps characterised by combination with, or adaptation to, specific driving engines or motors - F04C 25/02: for producing high vacuum (sealing arrangements F04C27/00; silencing F04C29/06) - F04C 29/0078: {Fixing rotors on shafts, e.g. by clamping together hub and shaft} - F04C 29/023: {Lubricant distribution through a hollow driving shaft (F04C29/025 takes precedence)} - F04C 29/028: {Means for improving or restricting lubricant flow} - F04C 18/3441: {the inner and outer member being in contact along one line or continuous surface substantially parallel to the axis of rotation} - F04C 2240/60: Shafts - F04C 2240/603: with internal channels for fluid distribution, e.g. hollow shaft - F04C 2240/809: Lubricant sump - F04C: ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS (engines F03C); ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS ## Abstract A vacuuming device comprises a main body, a rotary shaft, a vacuum pump rotor, a motor stator and a motor rotor. An air inlet, an air outlet, an oil storage chamber and a motor chamber are disposed in the main body. The oil storage chamber communicates with the air outlet. The rotary shaft is rotationally connected to the main body. The vacuum pump rotor is fixedly mounted to the rotary shaft and cooperatively forms a stator cavity of the vacuum pump with the inner-wall of the main body. The air inlet and the oil storage chamber communicate with the stator cavity of the vacuum pump respectively. The vacuuming device reduces the cost of manufacturing, optimizes the spatial structure and downsizes the device. ## Claims ### Claim 1 A vacuuming device, comprising: a main body, a rotary shaft, a vacuum pump rotor, a motor stator and a motor rotor, wherein the main body is provided with an air inlet, an air outlet, an oil storage chamber and a motor chamber; said oil storage chamber communicates with said air outlet, and said rotary shaft is rotationally located in said main body; said vacuum pump rotor is fixedly mounted to said rotary shaft and cooperatively forms a stator cavity of a vacuum pump with an inner wall of said main body; wherein said air inlet and said oil storage chamber communicate with said stator cavity of the vacuum pump respectively; both said motor stator and said motor rotor are arranged in said motor chamber, and said motor stator is fixedly connected to said main body, and said motor rotor is fixedly connected to said rotary shaft; wherein said main body is provided with an oil and air outlet passage, and one end of said oil and air outlet passage is corresponding to said vacuum pump rotor, the other end of the oil and air outlet passage is communicating with said motor chamber; wherein several annular silicon steel sheets are arranged inside said motor rotor, and the other end of said oil and air outlet passage communicating with said motor chamber communicates with a second annular oil passage; wherein said second annular oil passage is bounded by an inner wall of said main body in the motor chamber, said several annular silicon steel sheets and said motor stator; wherein said main body comprises a main structure, and said oil and air outlet passage is located inside said main structure; an internal of said main structure is provided with a shaft mounting hole, and said shaft mounting hole is configured to install said rotary shaft, and said oil and air outlet passage is arranged above said shaft mounting hole; and wherein said main body further comprises a first end cap connected with said main structure, and said first end cap and said main structure cooperatively forms a vacuum cartridge; wherein said main body further comprises a second end cap attached to the first end cap; and said second end cap and said main structure cooperatively forms a communicating chamber; said vacuum cartridge is configured to mount said vacuum pump rotor, and said vacuum cartridge is communicating with the one end of said oil and air outlet passage, and said oil storage chamber and said communicating chamber are communicating with each other; said air inlet is arranged on said first end cap; wherein said air inlet is communicated with said vacuum cartridge, and said air outlet is communicated with said communicating chamber. ### Claim 2 (depends on 1) The vacuuming device as claimed in claim 1, wherein a check valve corresponding to said air inlet is arranged on said first end cap to realize outside air flow into said vacuum cartridge as one-way flow. ### Claim 3 (depends on 1) The vacuuming device as claimed in claim 1, wherein said second end cap and said main structure cooperatively define said motor chamber, and said motor chamber is communicating with the other end of the oil and air outlet passage away from said vacuum cartridge. ### Claim 4 (depends on 1) The vacuuming device as claimed in claim 1, wherein said motor stator locates inside an area bounded by said motor rotor. ### Claim 5 (depends on 1) The vacuuming device as claimed in claim 1, wherein said rotary shaft is provided with a first annular oil passage, an oil suction hole and an oil suction passage; wherein said oil storage chamber, said first annular oil passage, said oil suction hole, said oil suction passage and said stator cavity of the vacuum pump successively communicate with one another. ### Claim 6 (depends on 5) The vacuuming device as claimed in claim 5, wherein said first annular oil passage is disposed on an outer wall of said rotary shaft; said oil suction hole extends along a radial direction of said rotary shaft, and said oil suction passage is located inside of said rotary shaft and extends along an axial direction of said rotary shaft. ### Claim 7 (depends on 6) The vacuuming device as claimed in claim 6, wherein an oil suction pipe is disposed on said main body, and one end of said oil suction pipe communicates with said first annular oil passage, the other end of said oil suction pipe communicates with said oil storage chamber. ### Claim 8 (depends on 1) The vacuuming device as claimed in claim 1, wherein said rotary shaft comprises a pump shaft and a motor shaft, and said pump shaft is molded in one body with said motor shaft. ### Claim 9 (depends on 1) A vacuum apparatus, comprising the vacuuming device as claimed in claim 1.