Single-package motor structure and all-premixing fan with same

Abstract

The utility model discloses a kind of single-packing motor structure and full premixing fan with it, it is related to fan technical field, and it includes: fan, the fan includes volute and the fan wheel in the volute, fan shaft hole is opened in the volute upside, the volute upside is provided with connecting column;Motor, the motor includes motor shaft and motor shell, support lug is set on the outer side wall of the motor shell;Adapter ring, the adapter ring upside is connected with the support lug downside, connecting ring is set on the adapter ring, the connecting ring has connecting ring through-hole, fastening screw is inserted into the connecting ring through-hole;Adapter ring is installed in the motor outer side cooperation size's connecting column that can be flexibly selected, also more can adapt to higher motor appearance characteristics to fix motor, adapter ring is equivalent to the support force of motor can be dispersed by adapter ring Transmission, cooperation sealing support sleeve in the middle of motor can improve the support ability to motor.

Description

Technical Field

[0001] This utility model relates to the field of fan technology, and in particular to a stand-alone motor structure and a fully premixed fan having the same. Background Technology

[0002] Currently, most gas water heaters still produce pollutants during operation, requiring timely venting. This typically involves a motor-driven fan, especially in fully premixed fans. The motor and fan of a fully premixed fan work together, and current motor connection methods usually require a bracket between the motor and fan to secure the motor. However, if the motor is relatively tall, such as a radial flux motor, or if space is required between the motor and fan to prevent a complete fit, this structure can easily lead to significant vibration during operation, compromising the motor's stability and reliability. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a self-mounted motor structure and a fully premixed fan incorporating the same.

[0004] According to a first aspect of the present invention, a stand-alone motor structure includes: a fan, the fan including a volute and a rotor inside the volute, the volute having a fan shaft hole on its upper side and a connecting post on its upper side; a motor, located on the upper side of the volute, the motor including a motor shaft and a motor housing, the lower end of the motor shaft passing through the fan shaft hole and connected to the rotor, a support lug on the outer wall of the motor housing, a central support boss at the lower center of the motor housing, a lower bearing inside the central support boss, the lower bearing being fitted onto the motor shaft, the motor shaft extending downward through the central support boss; an adapter ring fitted onto the outer side of the motor housing, the upper side of the adapter ring being connected to the lower side of the support lug, a connecting ring having a connecting ring through hole, a fastening screw being inserted into the connecting ring through hole, the connecting ring being connected to the connecting post by the fastening screw; and a sealing support sleeve fitted onto the central support boss, the bottom wall of the sealing support sleeve abutting against the upper surface of the volute.

[0005] According to some embodiments of the present invention, the adapter ring is provided with a connecting ring fixing hole and a support ear fixing hole, the connecting ring is inserted into the connecting ring fixing hole, and the support ear fixing hole and the support ear are connected by screws.

[0006] According to some embodiments of the present invention, a connecting ring slot is provided on the outer wall of the connecting ring, and the hole wall of the connecting ring fixing hole is inserted into the connecting ring slot.

[0007] According to some embodiments of this utility model, a motor shaft sealing ring is provided between the bottom wall of the sealing support sleeve and the upper end face of the volute.

[0008] According to some embodiments of the present invention, the upper side of the sealing support sleeve has a support sleeve cavity, and the intermediate support boss is inserted into the support sleeve cavity; a support rib is provided on the side wall of the support sleeve cavity, and the upper end of the support rib abuts against the bottom wall of the intermediate support boss.

[0009] According to some embodiments of this utility model, a buffer and shock-absorbing pad is provided between the upper end of the support rib and the bottom wall of the intermediate support boss.

[0010] According to some embodiments of the present invention, a connecting post step is provided at the upper end of the outer wall of the connecting post. The connecting post step has a vertical step surface and a horizontal step surface. The vertical step surface is engaged with the hole wall surface at the lower part of the connecting ring through hole, and the horizontal step surface abuts against the lower end surface of the connecting ring.

[0011] The stand-mounted motor structure according to the embodiments of this utility model has at least the following technical effects: 1. The design of connecting and fixing the motor with the pre-installed adapter ring and the support ear on the motor not only makes it easy to pre-install the adapter ring on the motor, but also allows for flexible selection of connecting posts of different sizes when the adapter ring is installed on the outside of the motor. It is also more adaptable to the characteristics of tall motors to fix the motor. The adapter ring can distribute and transmit the supporting force on the motor. Together with the sealing support sleeve in the middle of the motor, it can improve the support capacity of the motor. This is beneficial for leaving more space between the motor and the fan, and also for the stability of the motor. 2. The fixing holes of the connecting ring and the fixing holes of the support ear on the adapter ring are staggered, so that the positions of the support ear and the connecting ring are staggered. This allows the force on the fixed motor to be distributed, further improving the stability of the motor. 3. The intermediate support boss presses against the sealing support sleeve, allowing the motor shaft sealing ring to seal the gap between the motor and the fan located around the fan shaft hole, preventing airflow inside the volute from leaking out through the gap between the fan shaft hole and the motor shaft, thus affecting the suction effect.

[0012] The fully premixed fan according to the second aspect of the present invention includes the stand-alone motor structure according to the first aspect of the present invention.

[0013] According to some embodiments of the present invention, the volute includes a volute upper cover and a volute lower cover. The volute upper cover has a fan shaft hole, and the lower end of the motor shaft passes through the fan shaft hole and is connected to the impeller. The side wall of the volute upper cover has an air outlet, and the lower side of the volute lower cover has an air inlet.

[0014] According to some embodiments of this utility model, an air inlet shell is covered on the lower side of the air inlet opening, and a gas interface is provided on the side wall of the air inlet shell, which is connected to a gas source; an air guide tube is provided inside the air inlet shell, and the lower end of the air guide tube has a lower through hole, the bottom wall of the air inlet shell is connected to the wall of the lower through hole of the air guide tube, and the upper end of the air guide tube has an upper through hole, which is located below the impeller.

[0015] The fully premixed fan according to the embodiments of this utility model has at least the following beneficial effects: 1. The design of connecting and fixing the motor with the pre-installed adapter ring and the support ear on the motor not only makes it easy to pre-install the adapter ring on the motor, but also allows for flexible selection of connecting posts of different sizes when the adapter ring is installed on the outside of the motor. It is also more adaptable to the characteristics of tall motors to fix the motor. The adapter ring can distribute and transmit the supporting force on the motor. Together with the sealing support sleeve in the middle of the motor, it can improve the support capacity of the motor. This is beneficial for leaving more space between the motor and the fan, and also for the stability of the motor. 2. The upper cover and lower cover of the volute are detachable, which facilitates the installation of the impeller inside the volute and its connection with the motor shaft; 3. Outside air enters the air intake shell through the air interface, and the fuel gas enters the air intake shell through the fuel gas interface. In this way, the air and fuel gas are premixed inside the air intake shell, providing a stable environment for the premixing of air and fuel gas, which is conducive to more stable and reliable operation of the fully premixed fan.

[0016] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] Additional aspects and advantages of this invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a perspective view of the stand-alone motor structure of this utility model; Figure 2 This is an exploded view of the independent motor structure of this utility model; Figure 3 This is a partial sectional view of the stand-alone motor structure of this utility model; Figure 4 yes Figure 3 Enlarged view of region A in the middle; Figure 5 This is a cross-sectional view of the fan of this utility model; Figure 6 This is a cross-sectional view of the motor of this utility model; Figure 7This is a perspective view of the adapter ring of this utility model; Figure 8 This is a perspective view of the sealing support sleeve of this utility model.

[0018] Figure label: Fan 100, volute 110, volute upper cover 120, fan shaft hole 121, air outlet 122, support recess 123, volute lower cover 130, air inlet 131, connecting column 140, connecting column step 141, step vertical surface 142, step horizontal surface 143, impeller 150; motor 200, motor housing 210, support lug 211, intermediate support boss 212, upper bearing cavity 213, motor shaft 220, lower bearing 230, upper bearing 240; adapter ring 300 301 connecting ring fixing hole, 302 supporting ear fixing hole, connecting ring 310, 311 connecting ring through hole, 312 connecting ring slot, 320 fastening screw, 321 screw head, 322 threaded part; 400 sealing support sleeve, 401 motor shaft sealing ring, 402 buffer shock damping pad, 410 supporting sleeve cavity, 420 supporting rib; 500 air inlet shell, 510 gas interface, 521 air duct, 522 air duct lower through hole, 521 air duct upper through hole, 523 air duct baffle. Detailed Implementation

[0019] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0020] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] In the description of this utility model, "multiple" means two or more, and "greater than," "less than," "exceeding," etc., are understood to exclude the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly specifying the number of indicated technical features or their sequential relationship.

[0022] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0023] The following is for reference. Figure 1 and Figure 2 Describes the stand-alone motor structure according to an embodiment of the present utility model.

[0024] like Figure 1 and Figure 2 As shown, the stand-alone motor structure according to an embodiment of the present utility model includes a fan 100, a motor 200, and an adapter ring 300.

[0025] The fan 100 includes a volute 110 and a fan wheel 150 inside the volute 110. A fan shaft hole 121 is provided on the upper side of the volute 110, and a connecting post 140 is provided on the upper side of the volute 110. The motor 200 is located on the upper side of the volute 110 and includes a motor shaft 220 and a motor housing 210. The lower end of the motor shaft 220 passes through the fan shaft hole 121 and connects to the fan wheel 150. A support lug 211 is provided on the outer wall of the motor housing 210, and a central support boss 212 is provided at the middle position of the lower side of the motor housing 210. A lower bearing 230 is provided inside the central support boss 212 and is fitted onto the motor shaft 220. The motor shaft 220 extends downward through the central support boss 212. (See reference...) Figure 3 , Figure 4 The adapter ring 300 is fitted onto the outside of the motor housing 210. The upper side of the adapter ring 300 is connected to the lower side of the support ear 211. A connecting ring 310 is provided on the adapter ring 300. The connecting ring 310 has a connecting ring through hole 311. A fastening screw 320 is inserted into the connecting ring through hole 311. The connecting ring 310 and the connecting post 140 are connected by the fastening screw 320. The sealing support sleeve 400 is fitted onto the intermediate support boss 212. The bottom wall of the sealing support sleeve 400 abuts against the upper end face of the volute 110.

[0026] For example, such as Figure 1 and Figure 2As shown, the fan 100 includes a volute 110 and a rotor 150 inside the volute 110, which can rotate within the volute 110. A fan shaft hole 121 is provided on the upper side of the volute 110. A connecting post 140 is provided on the upper side of the volute 110. A motor 200 is located on the upper side of the volute 110 and is fixed to the fan 100. The motor 200 includes a motor shaft 220 and a motor housing 210. The lower end of the motor shaft 220 passes through the fan shaft hole 121 and connects to the rotor 150. The motor 200 drives the rotor 150 to rotate via the motor shaft 220. A support lug 211 is provided on the outer wall of the motor housing 210. A central support boss 212 is provided at the middle of the lower side of the motor housing 210. A lower bearing 230 is provided inside the central support boss 212. The lower bearing 230 is fitted onto the motor shaft 220, and the motor shaft 220 extends downward through the central support boss 212. A sealing support sleeve 400 is fitted onto the central support boss 212, and the bottom wall of the sealing support sleeve 400 abuts against the upper end face of the volute 110. (Refer to...) Figure 3 , Figure 4 The adapter ring 300 is fitted onto the outside of the motor housing 210. The upper side of the adapter ring 300 is connected to the lower side of the support ear 211. After the adapter ring 300 is fixedly connected to the motor housing 210, it remains relatively stationary. The adapter ring 300 is provided with a connecting ring 310, which has a connecting ring through hole 311. A fastening screw 320 is inserted into the connecting ring through hole 311. The connecting ring 310 and the connecting post 140 are connected by the fastening screw 320.

[0027] During actual assembly, refer to Figure 2 First, the motor 200 is pre-installed with the adapter ring 300 and the sealing support sleeve 400. Then, the connecting ring through hole 311 on the motor 200 is aligned with the connecting post 140 on the fan 100, and the corresponding fastening screws 320 are tightened to complete the fixed installation of the motor 200 and the fan 100.

[0028] The intermediate support boss 212 can work with the sealing support sleeve 400 to improve the stability of the lower part of the motor shaft 220 and improve the stability of the motor shaft 220 when it drives the impeller 150 to rotate.

[0029] Reference Figure 3 By using the pre-installed adapter ring 300 in conjunction with the support ear 211 on the motor 200, the support capacity of the motor 200 is improved. This means that the support force on the motor 200 can be distributed and transmitted by the adapter ring 300, which is beneficial to the stability of the motor 200. Together with the sealing support sleeve 400 in the middle position to hold the fan 100, it is sufficient to ensure that the motor 200 remains stable and reliable during operation and reduce vibration.

[0030] In addition, the design of the adapter ring 300 also helps to reduce the limitations on the shape of the motor 200.

[0031] In some embodiments of this utility model, the adapter ring 300 is made of a shock-absorbing material, so that the adapter ring 300 has a shock-absorbing effect.

[0032] In some embodiments of this utility model, reference is made to Figure 4 , Figure 7 The adapter ring 300 has a connecting ring fixing hole 301 and a support ear fixing hole 302. The connecting ring 310 is inserted into the connecting ring fixing hole 301, and the support ear fixing hole 302 and the support ear 211 are connected by screws. This effectively offsets the connecting ring fixing hole 301 and the support ear fixing hole 302 on the adapter ring 300, causing the support ear 211 and the connecting ring 310 to be misaligned. This disperses the force on the fixed motor 200, further improving the stability of the motor 200.

[0033] In some embodiments of this utility model, a connecting ring groove 312 is provided on the outer wall of the connecting ring 310, and the hole wall of the connecting ring fixing hole 301 is inserted into the connecting ring groove 312 to ensure a stable connection between the adapter ring 300 and the connecting ring 310.

[0034] In some specific embodiments of this utility model, the connecting ring 310 is made of shock-absorbing material, which gives the connecting ring 310 a certain material deformation capability, making it convenient to assemble and disassemble the connecting ring 310.

[0035] In some specific embodiments of this utility model, the fastening screw 320 has a screw head 321 and a threaded portion 322. The fastening screw 320 locks the upper end face of the connecting ring 310 through the screw head 321 and is threadedly connected to the connecting post 140 through the threaded portion 322.

[0036] In some embodiments of this utility model, reference is made to Figure 4 , Figure 6 A sealing support sleeve 400 is fitted onto the intermediate support boss 212, and the bottom wall of the sealing support sleeve 400 abuts against the upper end face of the volute 110. A motor shaft sealing ring 401 is provided between the bottom wall of the sealing support sleeve 400 and the upper end face of the volute 110.

[0037] The intermediate support boss 212 presses against the sealing support sleeve 400, so that the motor shaft sealing ring 401 can seal the gap between the motor 200 and the fan 100 located around the fan shaft hole 121, preventing the airflow in the volute 110 from leaking out through the gap between the fan shaft hole 121 and the motor shaft 220, thus affecting the air extraction effect.

[0038] In some embodiments of this utility model, reference is made to Figure 8The sealing support sleeve 400 has a support sleeve cavity 410 on its upper side, and a middle support boss 212 is inserted into the support sleeve cavity 410. Support ribs 420 are provided on the side wall of the support sleeve cavity 410, with the upper end of the support ribs 420 abutting against the bottom wall of the middle support boss 212. The structure of the support ribs 420 improves the structural strength of the sealing support sleeve 400 and enhances its support capacity for the motor 200.

[0039] The design of supporting the intermediate support boss 212 by the support rib 420 can reduce the transmission of the vibration of the fan 100 to the motor 200 and prevent the motor 200 and the fan 100 from resonating.

[0040] In some embodiments of this utility model, a buffer and shock-absorbing pad 402 is provided between the upper end of the support rib 420 and the bottom wall of the intermediate support boss 212 to further prevent the motor 200 and the fan 100 from resonating.

[0041] In a further embodiment of this utility model, a support recess 123 is provided on the upper side of the volute 110, and the fan shaft hole 121 is located in the support recess 123, which holds the lower end of the sealing support sleeve 400. This is sufficient to further improve the stability of the connection between the motor 200 and the fan 100.

[0042] In some embodiments of this utility model, reference is made to Figure 3 , Figure 4 A connecting post step 141 is provided at the upper end of the outer wall of the connecting post 140. The connecting post step 141 has a vertical step surface 142 and a horizontal step surface 143. The vertical step surface 142 engages with the lower wall surface of the connecting ring through hole 311, and the horizontal step surface 143 abuts against the lower end face of the connecting ring 310. In this way, the connecting post 140 can hold the connecting ring 310 through the connecting post step 141. The vertical step surface 142 engages with the connecting ring fixing hole 301, preventing horizontal displacement between the connecting ring 310 and the connecting post 140. The horizontal step surface 143 abuts against the lower end face of the connecting ring 310, ensuring that the connecting ring 310 can be vertically limited and fixed. In this way, the connecting post 140 can provide better stability for the connecting ring 310.

[0043] In some embodiments of this utility model, reference is made to Figure 6 An upper bearing cavity 213 is provided on the lower side of the top wall of the motor housing 210. An upper bearing 240 is provided inside the upper bearing cavity 213. The upper bearing 240 is fitted onto the upper part of the motor shaft 220 to improve the stability when the motor shaft 220 rotates and drives the impeller 150 to rotate.

[0044] The fully premixed fan according to the second aspect of the present invention includes the stand-alone motor structure according to the first aspect of the present invention.

[0045] According to the embodiments of the present invention, the fully premixed fan, by adopting the above-mentioned independent motor structure, reduces the complexity of the installation of the fully premixed fan, facilitates the simplified assembly design of the fully premixed fan, and can improve the stability of the fully premixed fan and enhance the user experience.

[0046] In some embodiments of this utility model, reference is made to Figure 2 , Figure 5 The volute 110 includes an upper volute cover 120 and a lower volute cover 130. The upper volute cover 120 has a fan shaft hole 121 and an air outlet 122 on its side wall. The lower volute cover 130 has an air inlet 131 on its lower side. After the motor 200 is pre-installed with the sealing support sleeve 400, and the connecting ring 310 on the motor 200 is fixed to the connecting post 140 of the upper volute cover 120, the impeller 150 can be installed on the motor shaft 220 first, and then the lower volute cover 130 can be fixed. This makes the installation of the impeller 150 more convenient and easier.

[0047] In some embodiments of this utility model, an air inlet shell 500 covers the lower side of the air inlet opening 131. A gas inlet interface 510 is provided on the side wall of the air inlet shell 500, and the gas inlet interface 510 is connected to a gas source. An air guide duct 520 is provided inside the air inlet shell 500. The lower end of the air guide duct 520 has a lower through hole 521, and the bottom wall of the air inlet shell 500 is connected to the wall of the lower through hole 521. The upper end of the air guide duct 520 has an upper through hole 522, which is located below the impeller 150. Outside air enters the air inlet shell 500 through the air guide duct 520, and fuel gas enters the air inlet shell 500 through the gas inlet interface 510. In this way, the air and fuel gas are premixed within the air inlet shell 500. This provides a stable environment for the premixing of air and fuel gas, which is beneficial for the more stable and reliable operation of the fully premixed fan.

[0048] Outside air enters the air duct 520 through the lower through-hole 521 and then passes through the upper through-hole 522 into the air inlet housing 500. Meanwhile, the fuel gas enters the air inlet housing 500 through the fuel gas inlet 510. Essentially, the air is output from the air duct 520 at a central position, and the fuel gas surrounds the air output from the air duct 520. This allows for better pre-mixing of the air and fuel gas within the air inlet housing 500.

[0049] In a further embodiment of this utility model, a baffle plate 523 is distributed on the outer wall of the air guide duct 520, so that the gas entering the air inlet shell 500 is slowed down by the baffle plate 523 to ensure that the air and gas are fully mixed.

[0050] Other components and operations of the fully premixed fan according to the embodiments of this utility model are known to those skilled in the art and will not be described in detail here.

[0051] The following is for reference. Figure 1 and Figure 2 The stand-alone motor structure according to an embodiment of the present invention is described in detail with reference to a specific example. It is to be understood that the following description is merely illustrative and not intended to limit the scope of the invention.

[0052] like Figure 1 and Figure 2 As shown, the fully premixed fan according to an embodiment of the present invention includes a fan 100, a motor 200, an adapter ring 300, a sealing support sleeve 400, and an air inlet shell 500.

[0053] The fan 100 includes a volute 110, a volute upper cover 120, a fan shaft hole 121, an air outlet 122, a support recess 123, a volute lower cover 130, an air inlet 131, a connecting column 140, a connecting column step 141, a step vertical surface 142, a step horizontal surface 143, and a fan wheel 150. The air inlet housing 500 is provided with a gas interface 510, an air duct 520, an air duct lower through hole 521, an air duct upper through hole 522, and an air duct baffle 523.

[0054] The motor 200 includes a motor housing 210, a support ear 211, a central support boss 212, an upper bearing cavity 213, a motor shaft 220, a lower bearing 230, and an upper bearing 240. The adapter ring 300 is provided with a connecting ring fixing hole 301, a support ear fixing hole 302, a connecting ring 310, a connecting ring through hole 311, a connecting ring slot 312, a fastening screw 320, a screw head 321, and a threaded portion 322. The sealing support sleeve 400 is provided with a motor shaft sealing ring 401, a buffer shock-absorbing pad 402, a support sleeve cavity 410, and a support rib 420.

[0055] In some embodiments of this utility model, the assembly process sequence of the fully premixed fan of this utility model is as follows: 1. Motor 200 pre-installed with sealing support sleeve 400; 2. The motor 200 and the adapter ring 300 are assembled and connected; 3. Adapter ring 300 is used to install connecting ring 310; 4. The connecting ring 310 is inserted into the connecting post 140 of the volute cover 120 using the motor fastening screw 320; 5. A fan wheel 150 is mounted on the motor shaft 220; 6. Install the lower cover 130 of the volute, the other components of the fan 100, and the air inlet casing 500 in sequence.

[0056] According to the stand-alone motor structure of this utility model embodiment, by setting it up in this way, at least the following effects can be achieved: by using the pre-installed adapter ring 300 in conjunction with the support ear 211 on the motor 200, the support capacity of the motor 200 is improved, which is equivalent to the support force on the motor 200 being distributed and transmitted by the adapter ring 300, which is beneficial to the stability of the motor 200; the design of the adapter ring 300 also helps to reduce the limitation of the shape of the motor 200.

[0057] In the description of this specification, references to terms such as "some embodiments" or "as one might imagine" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0058] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A self-mounted motor structure, characterized in that, include: A fan (100) includes a volute (110) and a fan wheel (150) inside the volute (110). A fan shaft hole (121) is provided on the upper side of the volute (110), and a connecting column (140) is provided on the upper side of the volute (110). A motor (200) is located on the upper side of the volute (110). The motor (200) includes a motor shaft (220) and a motor housing (210). The lower end of the motor shaft (220) passes through the fan shaft hole (121) and is connected to the impeller (150). A support ear (211) is provided on the outer side wall of the motor housing (210). A middle support boss (212) is provided at the middle position of the lower side of the motor housing (210). A lower bearing (230) is provided inside the middle support boss (212). The lower bearing (230) is fitted on the motor shaft (220). The motor shaft (220) extends downward through the middle support boss (212). An adapter ring (300) is fitted onto the outside of the motor housing (210). The upper side of the adapter ring (300) is connected to the lower side of the support ear (211). A connecting ring (310) is provided on the adapter ring (300). The connecting ring (310) has a connecting ring through hole (311). A fastening screw (320) is inserted into the connecting ring through hole (311). The connecting ring (310) is connected to the connecting post (140) through the fastening screw (320). A sealing support sleeve (400) is fitted onto the intermediate support boss (212), and the bottom wall of the sealing support sleeve (400) abuts against the upper surface of the volute (110).

2. The independently mounted motor structure according to claim 1, characterized in that, The adapter ring (300) has a connecting ring fixing hole (301) and a support ear fixing hole (302). The connecting ring (310) is inserted into the connecting ring fixing hole (301), and the support ear fixing hole (302) and the support ear (211) are connected by screws.

3. The independently mounted motor structure according to claim 2, characterized in that, The outer wall of the connecting ring (310) is provided with a connecting ring slot (312), and the hole wall of the connecting ring fixing hole (301) is inserted into the connecting ring slot (312).

4. The independently mounted motor structure according to claim 1, characterized in that, A motor shaft sealing ring (401) is provided between the bottom wall of the sealing support sleeve (400) and the upper end face of the volute (110).

5. The independently mounted motor structure according to claim 1, characterized in that, The upper side of the sealing support sleeve (400) has a support sleeve cavity (410), and the intermediate support boss (212) is inserted into the support sleeve cavity (410). The side wall of the support sleeve cavity (410) is provided with a support rib (420), and the upper end of the support rib (420) abuts against the bottom wall of the intermediate support boss (212).

6. The independently mounted motor structure according to claim 5, characterized in that, A buffer and shock-absorbing pad (402) is provided between the upper end of the support rib (420) and the bottom wall of the intermediate support boss (212).

7. The independently mounted motor structure according to claim 1, characterized in that, The upper end of the outer wall of the connecting column (140) is provided with a connecting column step (141). The connecting column step (141) has a vertical step surface (142) and a horizontal step surface (143). The vertical step surface (142) is stuck in the lower hole wall surface of the connecting ring through hole (311), and the horizontal step surface (143) abuts against the lower end surface of the connecting ring (310).

8. A fully premixed fan, characterized in that, Includes a stand-alone motor structure according to any one of claims 1 to 7.

9. The fully premixed fan according to claim 8, characterized in that, The volute (110) includes a volute upper cover (120) and a volute lower cover (130). The fan shaft hole (121) is provided on the volute upper cover (120), the air outlet opening (122) is provided on the side wall of the volute upper cover (120), and the air inlet opening (131) is provided on the lower side of the volute lower cover (130).

10. The fully premixed fan according to claim 9, characterized in that, The air inlet opening (131) is covered by an air inlet shell (500) on the lower side. A gas inlet (510) is provided on the side wall of the air inlet shell (500), and the gas inlet (510) is connected to a gas source. An air guide tube (520) is provided inside the air inlet shell (500). The lower end of the air guide tube (520) has a lower through hole (521). The bottom wall of the air inlet shell (500) is connected to the hole wall of the lower through hole (521). The upper end of the air guide tube (520) has an upper through hole (522). The upper through hole (522) is located below the impeller (150).

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