Full plastic package motor for strong exhaust fan

Abstract

The utility model discloses a full plastic package motor for a strong exhaust fan, which comprises a shell, the shell is designed to be in a circular barrel shape, a rotor piece is rotatably arranged in the shell, one end of the rotor piece penetrates through the side surface of the shell, and a stator iron core is arranged on the side surface of one end of the shell. And the side surface of the stator core is attached to the side surface of the shell, and one end of the shell is provided with an integrated structure, so that the motor can be manufactured more compactly and the cost is reduced through the integrated structure. According to the full-plastic-packaged motor for the strong exhaust fan, the motor shell, the flange and the front shaft cavity are manufactured together through injection molding of unsaturated resin materials, manufacturing of the shell, the flange and the front shaft cavity is completed at a time through integrated injection molding, the cost of multiple times of stamping is reduced, and the front shaft cavity is kept high in concentricity; vibration and noise generated during operation of the motor are reduced, the service life of the motor is prolonged, and the manufacturing cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of strong exhaust fans, in particular to a fully plastic-sealed motor for a strong exhaust fan. Background Art

[0002] With the advancement and development of science and technology, more and more machines are being created and produced. Taking a bath at home is no longer a difficult task. Common water heaters use electricity, solar energy and gas. Existing wall-mounted gas water heaters will produce exhaust gas when in use. At this time, the exhaust gas generated by use needs to be discharged outdoors to prevent the accumulation of exhaust gas in the house. However, most of the exhaust fans used in existing wall-mounted gas water heaters are still using traditional AC motors and a small number of iron shell DC fans. The former is large in size and noisy, and the latter has many manufacturing processes and high costs. Among them, flanges are needed to fix the motor in the gas water heater, but the existing flanges are all formed by multiple stamping of the motor front cover. The concentricity of the bearing chamber will deteriorate during multiple stampings, resulting in a shortened service life of the motor. Utility Model Content

[0003] The utility model aims to provide a fully plastic-sealed motor for a strong exhaust fan, so as to solve the problem in the above background technology that the concentricity of the bearing chamber deteriorates and the service life is shortened due to multiple stamping during the manufacture of the motor.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a fully plastic-sealed motor for a forced exhaust fan, comprising a shell, the shell being a circular barrel-shaped design, and a frustum-shaped protrusion is provided on the side surface of one end of the shell, and a through hole is opened at the center of the shell, a rotor component is rotatably installed inside the shell, and one end of the rotor component passes through the side surface of the shell, a stator core is provided on the side surface of one end of the shell, and the side surface of the stator core is fitted with the side surface of the shell, and the shell and the stator core are concentrically designed, and an integrated structure is provided at one end of the shell, and the integrated structure enables the motor to be manufactured more compactly and reduce costs.

[0005] Preferably, the integrated structure includes: a flange, which is embedded in the side surface of the shell away from the front axle cavity, and the material of the shell is BMC unsaturated resin material, and the flange and the shell are concentrically designed, the front axle cavity is opened inside the shell, and a block-shaped protrusion is opened inside the front axle cavity, and the front axle cavity and the shell are concentrically designed.

[0006] By adopting the above technical solution, by changing the material of the shell to BMC (unsaturated resin) material, the shell, flange, and front axle cavity are injection molded in one step, which has the advantages of low material cost, small size, and fewer processing steps.

[0007] Preferably, a fixing structure is provided inside the shell, and the wires led out of the stator core are compressed and tensile-resistant by the fixing structure.

[0008] By adopting the technical solution, the three electric wires which pass through the wire holes into the housing can be compressed, so that the three electric wires can withstand a certain external pulling force without breaking.

[0009] Preferably, the fixing structure comprises: a connecting column, which is fixedly installed on the inner surface of the shell, and a wire threading hole is opened on the side of the shell away from the flange, and the inside of the wire threading hole passes through the three wires U, V, and W, a connecting fixing ring is provided on one side of the connecting column, and a snap-fit ​​fixing block is fixedly installed on one side of the connecting fixing ring, and one end of the snap-fit ​​fixing block is snap-fitted with the inner surface of the shell, a side surface of one end of the connecting fixing ring is fitted with a side surface of the stator core, and the side surface of the stator core is fitted with a side surface of the snap-fit ​​fixing block, a PCB ring is fitted on the side surface of one end of the stator core, and the U, V, and W winding wires between the PCB ring and the stator core are connected by welding.

[0010] The above technical solution can be used to conveniently fix the U, V, W three-phase winding needles on the stator core and lead out the needle heads when the stator core is plastic-sealed, and then drive the screw into the middle fixing seat through the rear end cover to fix the rear end cover.

[0011] Preferably, a rear end cover is provided on one side of the shell, and a rear axle cavity is fixedly provided inside the rear end cover, and the rear axle cavity and the rear end cover are concentrically designed, the material of the rear end cover is BMC unsaturated resin material, and the outer surface of the rear end cover is penetrated by a screw, and the rear end cover is concentrically designed with the outer shell.

[0012] With the above technical solution, the rear end cover is connected to the housing through a screw, and the stator core and the rotor component are clamped by the rear end cover and the housing, so that the stator core and the rotor component are fixed inside the housing.

[0013] Preferably, a first bearing is fixedly installed at one end of the rotor component, and a first sleeve is fixedly installed on the outer surface of the first bearing, the outer surface of the rotor component passes through the side surface of the first sleeve, and the first sleeve and the first bearing are inserted inside the front shaft cavity, and a second bearing is fixedly installed at one end of the rotor component close to the rear end cover, and a second sleeve is fixedly installed on the outer surface of the second bearing, and the second sleeve and the second bearing are inserted in the rear shaft cavity, and the first sleeve and the second sleeve are made of rubber material.

[0014] By adopting the above technical solution, since both the rear axle cavity and the front axle cavity are made of BMC material, the size of the rear axle cavity and the front axle cavity will change when the temperature changes, and the clearance between the first bearing and the second bearing and the rear axle cavity and the front axle cavity will easily increase and slip. At this time, the rubber elastic characteristics of the first sleeve and the second sleeve can be used to offset the size change of the bearing chamber and eliminate the slippage between the first bearing and the second bearing and the rear axle cavity and the front axle cavity.

[0015] Preferably, a middle fixing seat is fixedly installed at one end of the connecting fixing ring away from the stator core, and the rear end cover and the connecting fixing ring are concentrically designed, the outer diameter of the rear end cover is engaged with the inner diameter of the outer shell, and the side surface of the middle fixing seat is in contact with the side surface of the rear end cover, and the middle fixing seat is threadedly connected to the screw.

[0016] By adopting the above technical solution, the outer diameter of the rear end cover is matched with the inner diameter of the shell, so that the rear shaft cavity and the front shaft cavity can achieve a higher concentricity, while reducing the rotation noise and extending the service life.

[0017] Compared with the prior art, the utility model has the following beneficial effects: the fully plastic-sealed motor used in the strong exhaust fan:

[0018] 1. The motor housing, flange and front axle cavity are manufactured together by injection molding BMC (unsaturated resin) material. The housing, flange and front axle cavity are manufactured at one time through one-piece injection molding, which reduces the cost of multiple stampings, keeps the front axle cavity at a high concentricity, reduces the vibration and noise generated when the motor is running, increases the service life of the motor, and saves manufacturing costs;

[0019] 2. The three winding needles of the stator core can be led out through the threading hole, and then the three winding needles of the stator core are welded and connected to the PCB ring. Then the motor lead is passed through the threading hole, and pressed again through the connecting fixing ring, so that the connecting fixing ring is inserted into the outer surface of the shell, so that the connecting fixing ring presses the three winding needles and the motor lead, and fixes them on the connecting column, thereby improving the tensile strength of the motor lead. At the same time, the rear end cover is fixed through the middle fixing seat and the screw;

[0020] 3. Because the rear axle cavity and the front axle cavity are both made of BMC (unsaturated resin) material, the temperature will rise while the motor is running. The rising temperature will cause the rear axle cavity and the front axle cavity to deform, and the gap between the rear axle cavity and the front axle cavity and the first bearing and the second bearing to increase, causing slipping. By inserting the first and second rubber sleeves, the elastic properties of rubber can be used to eliminate the risk of slipping. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the explosion structure of the fully plastic-sealed motor of the utility model;

[0022] Figure 2 This is a schematic diagram of the cross-sectional structure of the housing and flange of the utility model;

[0023] Figure 3 This is a schematic diagram of the cross-sectional structure of the rear end cover and the rear axle cavity of the utility model;

[0024] Figure 4 This is a schematic diagram of the cutaway three-dimensional structure of the housing and the rotor of the utility model;

[0025] Figure 5 This is a schematic diagram of the three-dimensional structure of the housing and the threading hole of the utility model;

[0026] Figure 6 It is a schematic diagram of the three-dimensional structure of the PCB ring and the rear end cover of the utility model.

[0027] In the figure: 1. outer shell; 2. flange; 3. stator core; 4. connecting fixing ring; 5. rotor part; 6. first bearing; 7. second bearing; 8. PCB ring; 9. rear end cover; 10. first sleeve; 11. second sleeve; 12. threading hole; 13. rear shaft cavity; 14. snap-fit ​​fixing block; 15. connecting column; 16. middle fixing seat; 17. front shaft cavity; 18. screw. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] See also Figure 1-6 The utility model provides a technical solution: a fully plastic-sealed motor for a strong exhaust fan, comprising a shell 1, the shell 1 is a circular barrel design, and a frustum-shaped protrusion is arranged on the side surface of one end of the shell 1, and a through hole is opened at the center of the shell 1, a rotor part 5 is rotatably installed inside the shell 1, and one end of the rotor part 5 passes through the side surface of the shell 1, a stator core 3 is arranged on the side surface of one end of the shell 1, and the side surface of the stator core 3 is fitted with the side surface of the shell 1, and the shell 1 and the stator core 3 are concentrically designed, and an integrated structure is arranged at one end of the shell 1, and the motor can be manufactured more compactly and at a lower cost through the integrated structure, and the integrated structure comprises: a flange 2, the flange 2 is embedded and installed on the side surface of one end of the shell 1 away from the front shaft cavity 17, and the material of the shell 1 is BMC unsaturated resin material, and the flange 2 and the shell 1 are concentrically designed, a front shaft cavity 17 is opened inside the shell 1, and a block-shaped protrusion is opened inside the front shaft cavity 17, and the front shaft cavity 17 is concentrically designed with the shell 1.

[0030] The motor housing 1, flange 2 and front axle cavity 17 are injection molded together by unsaturated resin. The housing 1, flange 2 and front axle cavity 17 are manufactured at one time by one-piece injection molding, thereby reducing the cost of multiple stamping to produce the flange 2, allowing the front axle cavity 17 to maintain a high degree of concentricity with the housing 1, and saving the cost of manufacturing the motor.

[0031] A fixing structure is provided inside the housing 1, and the wires led out of the stator core 3 are compressed and tensile-resistant by the fixing structure.

[0032] The three winding needles of the stator core 3 can be led out through the threading holes 12, which is convenient for fixing during injection molding.

[0033] The fixing structure includes: a connecting column 15, which is fixedly installed on the inner surface of the shell 1, and a wire threading hole 12 is opened on the side of the shell 1 away from the flange 2, and the inside of the wire threading hole 12 passes through the three wires U, V, and W, a connecting fixing ring 4 is provided on one side of the connecting column 15, and a clamping fixing block 14 is fixedly installed on one side of the connecting fixing ring 4, and one end of the clamping fixing block 14 is clamped with the inner surface of the shell 1, and the side surface of one end of the connecting fixing ring 4 is in contact with the side surface of the stator core 3, and the side surface of the stator core 3 is in contact with the side surface of the clamping fixing block 14, and a PCB ring 8 is provided on the side surface of one end of the stator core 3, and the U, V, and W winding wires between the PCB ring 8 and the stator core 3 are connected by welding.

[0034] The three-phase winding needles of the stator core 3 are welded to the PCB ring 8, and then the motor leads on the PCB ring 8 are passed through the threading holes 12, and are pressed together again through the connecting and fixing ring 4, so that the snap-fitting fixing block 14 is inserted into the inner surface of the outer shell 1, so that the connecting and fixing ring 4 presses the three-phase winding needles and the motor leads, and the connecting and fixing ring 4 is positioned by inserting the snap-fitting fixing block 14 into the inner surface of the outer shell 1, and then the connecting and fixing ring 4 is fixed to the connecting column 15 of the outer shell 1 by screws, and the motor leads are fixed to the PCB ring 8 by the extrusion between the outer shell 1 and the connecting and fixing ring 4, so as to improve the tensile strength of the motor leads, and at the same time, the rear end cover 9 is fixed by the middle fixing seat 16 and the screw 18.

[0035] A rear end cover 9 is provided on one side of the outer shell 1, and a rear axle cavity 13 is fixedly provided inside the rear end cover 9, and the rear axle cavity 13 and the rear end cover 9 are concentrically designed. The material of the rear end cover 9 is BMC unsaturated resin material, and the outer surface of the rear end cover 9 is penetrated by a screw 18, and the rear end cover 9 and the outer shell 1 are concentrically designed.

[0036] The screw 18 passes through the rear end cover 9 and is connected to the middle fixing seat 16. By tightening the rear end cover 9 and the outer shell 1, the stator core 3 and the rotor component 5 are squeezed and clamped, so that the stator core 3 and the rotor component 5 are fixed inside the outer shell 1 and will not run out, and the rear end cover 9 is fixed on the middle fixing seat 16 at the same time.

[0037] A first bearing 6 is fixedly installed at one end of the rotor component 5, and a first sleeve 10 is fixedly installed on the outer surface of the first bearing 6. The outer surface of the rotor component 5 passes through the side surface of the first sleeve 10, and the first sleeve 10 and the first bearing 6 are inserted in the front shaft cavity 17. A second bearing 7 is fixedly installed at one end of the rotor component 5 close to the rear end cover 9, and a second sleeve 11 is fixedly installed on the outer surface of the second bearing 7, and the second sleeve 11 and the second bearing 7 are inserted in the rear shaft cavity 13. The first sleeve 10 and the second sleeve 11 are made of rubber material.

[0038] Since the rear axle cavity 13 and the front axle cavity 17 are both made of BMC material by injection molding, heat will be generated when the motor is running, causing the rear axle cavity 13 and the front axle cavity 17 to deform, so that the gap between the first bearing 6 and the front axle cavity 17, and the second bearing 7 and the rear axle cavity 13 becomes larger, causing slippage. At this time, the rubber elastic characteristics of the first sleeve 10 and the second sleeve 11 can be used to offset the size change of the bearing chamber, eliminate the gap between the first bearing 6 and the second bearing 7 and the rear axle cavity 13 and the front axle cavity 17, and make the rotor member 5 rotate smoothly.

[0039] A middle fixing seat 16 is fixedly installed at one end of the connecting fixing ring 4 away from the stator core 3, and the rear end cover 9 and the connecting fixing ring 4 are concentrically designed, the outer diameter of the rear end cover 9 is engaged with the inner diameter of the outer shell 1, and the side surface of the middle fixing seat 16 is in contact with the side surface of the rear end cover 9, and the middle fixing seat 16 is threadedly connected to the screw 18.

[0040] By matching the outer diameter of the rear end cover 9 with the inner diameter of the housing 1, the rear end cover 9 is snapped onto one end of the housing 1, so that the rear shaft cavity 13 and the front shaft cavity 17 can achieve a higher concentricity, and the first bearing 6 and the second bearing 7 can maintain concentricity, so that the rotor part 5 will not be deformed, and the vibration caused by the swing of the rotor part 5 when the motor rotates is reduced. At the same time, the rotation noise is reduced, and the service life of the motor is extended.

[0041] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fully plastic-encapsulated motor for a forced exhaust fan, comprising a housing (1), wherein the housing (1) is designed in a circular barrel shape, and a frustum-shaped protrusion is provided on the side surface of one end of the housing (1), and a through hole is opened at the center of the housing (1), a rotor component (5) is rotatably mounted inside the housing (1), and one end of the rotor component (5) penetrates the side surface of the housing (1), a stator core (3) is provided on the side surface of one end of the housing (1), and the side surface of the stator core (3) is in contact with the side surface of the housing (1), and the housing (1) and the stator core (3) are of a concentric design, characterized in that: An integral structure is provided at one end of the shell (1); the integral structure comprises: a flange (2), the flange (2) being embedded and installed on a side surface of an end of the shell (1) away from the front axle cavity (17), the shell (1) being made of a BMC unsaturated resin material, the flange (2) and the shell (1) being designed concentrically, the shell (1) being provided with a front axle cavity (17), the front axle cavity (17) being provided with a block-shaped protrusion, and the front axle cavity (17) and the shell (1) being designed concentrically.

2. A fully plastic-encapsulated motor for a forced exhaust fan according to claim 1, characterized in that: A fixing structure is provided inside the housing (1), and the wires led out of the stator core (3) are compressed and tensile-resistant by the fixing structure.

3. A fully plastic-encapsulated motor for a forced exhaust fan according to claim 2, characterized in that: The fixing structure comprises: a connecting column (15), the connecting column (15) being fixedly mounted on the inner surface of the housing (1), and a threading hole (12) being provided on a side of the housing (1) away from the flange (2), and three wires U, V and W passing through the threading hole (12); a connecting fixing ring (4) being provided on one side of the connecting column (15), and a snap-fit ​​fixing block (14) being fixedly mounted on one side of the connecting fixing ring (4), and one end of the snap-fit ​​fixing block (14) being snap-fitted with the inner surface of the housing (1); a side surface of one end of the connecting fixing ring (4) being fitted with a side surface of the stator core (3), and a side surface of the stator core (3) being fitted with a side surface of the snap-fit ​​fixing block (14); a PCB ring (8) being fitted on one side surface of the stator core (3), and the U, V and W winding wires between the PCB ring (8) and the stator core (3) being connected by welding.

4. The fully plastic-encapsulated motor for a forced exhaust fan according to claim 1, characterized in that: A rear end cover (9) is provided on one side of the housing (1), and a rear shaft cavity (13) is fixedly provided inside the rear end cover (9), and the rear shaft cavity (13) and the rear end cover (9) are designed to be concentric, the material of the rear end cover (9) is a BMC unsaturated resin material, and the outer surface of the rear end cover (9) is penetrated by a screw (18), and the rear end cover (9) and the housing (1) are designed to be concentric.

5. The fully plastic-encapsulated motor for a forced exhaust fan according to claim 1, characterized in that: A first bearing (6) is fixedly mounted on one end of the rotor component (5), and a first sleeve (10) is fixedly mounted on the outer surface of the first bearing (6); the outer surface of the rotor component (5) passes through the side surface of the first sleeve (10), and the first sleeve (10) and the first bearing (6) are inserted into the interior of the front shaft cavity (17); a second bearing (7) is fixedly mounted on one end of the rotor component (5) close to the rear end cover (9), and a second sleeve (11) is fixedly mounted on the outer surface of the second bearing (7), and the second sleeve (11) and the second bearing (7) are inserted into the rear shaft cavity (13); the first sleeve (10) and the second sleeve (11) are made of rubber material.

6. The fully plastic-encapsulated motor for a forced exhaust fan according to claim 3, characterized in that: A middle connection fixing seat (16) is fixedly mounted on one end of the connection fixing ring (4) away from the stator core (3), and the rear end cover (9) and the connection fixing ring (4) are designed to be concentric, the outer diameter of the rear end cover (9) is engaged with the inner diameter of the housing (1), and the side surface of the middle connection fixing seat (16) is in contact with the side surface of the rear end cover (9), and the middle connection fixing seat (16) is threadedly connected to the screw rod (18).

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