OTR motor with a new type of axial positioning assembly

Abstract

The utility model relates to OTR motor technical field, and disclose a kind of OTR motor with novel axial positioning assembly, solve the problem of the axial positioning effect of existing OTR motor is bad, it includes motor main body, motor main shaft is inserted and arranged in the center position of motor main body, the one end of motor main body is fixedly arranged with first fan, the one end of motor main body away from first fan is provided with second fan, first fan and second fan are connected with motor main shaft, first fan and second fan are all by volute, squirrel-cage rotor and axial positioning assembly constitute, axial positioning assembly is fixedly connected in volute interior the one end away from motor main body and with the one end of motor main shaft adhesion, axial positioning assembly is by center column, several support arms and universal ball constitute;By the OTR motor, it can have better axial positioning function, and then improve service life.

Description

Technical Field

[0001] This utility model belongs to the field of OTR motor technology, specifically an OTR motor with a novel axial positioning component. Background Technology

[0002] An OTR (over-the-range) microwave oven is a microwave oven that also functions as a range hood. It is installed on the wall above the gas stove in the kitchen to cook using microwaves within its cavity. A combination of a motor and a fan installed in the OTR microwave oven draws in or exhausts combustion gases and pollutants from the gas stove located below it (i.e., it performs a ventilation function). When the OTR motor is working, it drives a squirrel-cage rotor inside the fan to rotate, thereby drawing in the gases. Currently used OTR motors are typically through-shaft structures, which have the disadvantage of poor axial positioning. Axial displacement can affect service life and cause significant wear and noise. Therefore, this application proposes an OTR motor with a novel axial positioning component. Utility Model Content

[0003] In view of the above situation and to overcome the defects of the prior art, this utility model provides an OTR motor with a novel axial positioning component, which effectively solves the problem of poor axial positioning effect of existing OTR motors.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an OTR motor with a novel axial positioning component, comprising a motor body, a motor spindle inserted at the center of the motor body, the two ends of the motor spindle extending toward the two ends of the motor body respectively, a first fan fixedly mounted at one end of the motor body, and a second fan mounted at the end of the motor body away from the first fan, both the first and second fans being connected to the motor spindle, both the first and second fans being composed of a volute, a squirrel-cage rotating drum and an axial positioning component, the volute being fixedly connected to the outer shell of the motor body, the squirrel-cage rotating drum being located inside the volute and connected to the motor spindle, and the axial positioning component being fixedly connected inside the volute at the end away from the motor body and fitting against the end of the motor spindle; The axial positioning assembly consists of a central column, several support arms, and universal balls. One end of the central column is fixedly connected to the end of the volute housing away from the motor body through the support arms. The universal balls are rotatably connected to the end of the central column away from the support arms and fit against the end of the motor spindle. The end of the motor spindle near the central column has a groove that matches the universal balls.

[0005] Preferably, an air inlet guide cone is fixedly provided at the end of the central column away from the universal ball bearing.

[0006] Preferably, the two ends of the arc-shaped outer surface of the squirrel-cage drum are rotatably connected to the inner wall of the volute via ball bearing one and ball bearing two, respectively, and the end of the squirrel-cage drum away from the motor spindle is rotatably connected to the volute via a plane bearing.

[0007] Preferably, an air inlet is provided at one end of the volute, and an air outlet is provided at the top of one side of the volute.

[0008] Preferably, a keyway is provided at the center of one end of the squirrel-cage rotary drum, and a key matching the keyway is provided on the motor spindle.

[0009] Compared with the prior art, the beneficial effects of this utility model are: (1) In operation, by setting an axial positioning assembly consisting of a central column, several support arms and universal ball bearings, and setting a first fan and a second fan consisting of a volute, a squirrel-cage rotating drum and an axial positioning assembly, the volute can support the axial positioning assembly, and the central column and universal ball bearings can achieve axial positioning of the motor spindle, providing working stability of the motor spindle, avoiding axial displacement, and thus improving the service life of the OTR motor. (2) By setting ball bearing one and ball bearing two, radial positioning of the squirrel cage drum can be achieved, while improving the mobility and stability of the squirrel cage drum. By setting a plane bearing, axial auxiliary positioning of the squirrel cage drum can be achieved, thereby enabling axial auxiliary positioning of the motor spindle. Attached Figure Description

[0010] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0011] In the attached diagram: Figure 1 This is a schematic diagram of the OTR motor structure with a novel axial positioning component according to this utility model. Figure 2 This is a partial structural diagram of the OTR motor with a novel axial positioning component according to this utility model; Figure 3 This is a schematic diagram of the motor spindle structure of this utility model; Figure 4 This is an exploded view of the first wind turbine of this utility model; Figure 5 This is a partial structural diagram of the rat cage-type rotating drum of this utility model; Figure 6 This is a schematic diagram of the volute structure of this utility model; In the diagram: 1. Motor body; 2. Motor spindle; 3. First fan; 4. Second fan; 5. Volute; 6. Squirrel-cage rotary drum; 7. Axial positioning assembly; 8. Center column; 9. Support arm; 10. Universal ball bearing; 11. Groove; 12. Inlet guide cone; 13. Ball bearing one; 14. Ball bearing two; 15. Surface bearing; 16. Air inlet; 17. Air outlet; 18. Keyway; 19. Key. Detailed Implementation

[0012] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0013] Depend on Figures 1 to 6 The present invention discloses an OTR motor with a novel axial positioning component, comprising a motor body 1, a motor spindle 2 inserted at the center of the motor body 1, and two ends of the motor spindle 2 extending toward the two ends of the motor body 1 respectively. A first fan 3 is fixedly installed at one end of the motor body 1, and a second fan 4 is installed at the end of the motor body 1 away from the first fan 3. Both the first fan 3 and the second fan 4 are connected to the motor spindle 2. Both the first fan 3 and the second fan 4 are composed of a volute 5, a squirrel-cage rotating cylinder 6, and an axial positioning component 7. The volute 5 is fixedly connected to the outer shell of the motor body 1. The squirrel-cage rotating cylinder 6 is located inside the volute 5 and connected to the motor spindle 2. The axial positioning component 7 is fixedly connected inside the volute 5 at the end away from the motor body 1 and is attached to the end of the motor spindle 2. The motor spindle 2 drives the squirrel-cage drum 6 to rotate. The squirrel-cage drum 6 and the volute 5 work together to suck up microwave oven fumes. The axial positioning component 7 can be connected to the volute 5 to axially position the motor spindle 2. The axial positioning assembly 7 consists of a central column 8, several support arms 9 and universal balls 10. One end of the central column 8 is fixedly connected to the end of the volute 5 away from the motor body 1 through the support arms 9. The universal balls 10 are rotatably connected to the end of the central column 8 away from the support arms 9 and fit against one end of the motor spindle 2. The end of the motor spindle 2 near the central column 8 has a groove 11 that matches the universal balls 10. When the axial positioning component 7 is in position, the support arm 9 provides stable support for the central column 8, the central column 8 supports the universal ball bearing 10, and the universal ball bearing 10 fits into the groove 11 on the motor spindle 2, thereby enabling axial positioning of the motor spindle 2, improving the working stability of the motor spindle 2, and preventing axial displacement. An air inlet guide cone 12 is fixedly installed at the end of the central column 8 away from the universal ball bearing 10 to avoid obstructing air intake; The two ends of the arc-shaped outer surface of the squirrel-cage drum 6 are rotatably connected to the inner wall of the volute 5 through ball bearing 13 and ball bearing 2 14 respectively. The end of the squirrel-cage drum 6 away from the motor spindle 2 is rotatably connected to the volute 5 through a plane bearing 15. Ball bearing 13 and ball bearing 2 14 can achieve radial limiting of the squirrel-cage drum 6, and plane bearing 15 can achieve auxiliary axial limiting of the squirrel-cage drum 6, thereby achieving axial auxiliary limiting of the motor spindle 2. The movement and stability of the squirrel-cage drum 6 can be improved simultaneously through ball bearing 13, ball bearing 2 14 and plane bearing 15. An air inlet 16 is provided at one end of the volute 5, and an air outlet 17 is provided at the top of one side of the volute 5, which can realize air intake and exhaust. A keyway 18 is provided at the center of one end of the squirrel-cage drum 6, and a key 19 matching the keyway 18 is provided on the motor spindle 2, which enables the squirrel-cage drum 6 to be positioned and connected to the motor spindle 2.

[0014] In operation, by setting up an axial positioning assembly consisting of a central column, several support arms, and universal ball bearings, and by setting up a first fan and a second fan consisting of a volute, a squirrel-cage rotating drum, and the axial positioning assembly, the volute can support the axial positioning assembly, and the central column and universal ball bearings can achieve axial positioning of the motor spindle, providing working stability of the motor spindle, avoiding axial displacement, and thus improving the service life of the OTR motor. By setting up ball bearing one and ball bearing two, radial limiting of the squirrel-cage rotating drum can be achieved, while improving the mobility and stability of the squirrel-cage rotating drum. By setting up a plane bearing, axial auxiliary positioning of the squirrel-cage rotating drum can be achieved, thereby achieving axial auxiliary limiting of the motor spindle.

Claims

1. An OTR motor with a novel axial positioning component, comprising a motor body (1), characterized in that: The motor body (1) is provided with a motor spindle (2) inserted at the center. The two ends of the motor spindle (2) extend to the two ends of the motor body (1). A first fan (3) is fixedly provided at one end of the motor body (1). A second fan (4) is provided at the end of the motor body (1) away from the first fan (3). The first fan (3) and the second fan (4) are both connected to the motor spindle (2). The first fan (3) and the second fan (4) are both composed of a volute (5), a squirrel-cage rotating drum (6) and an axial positioning component (7). The volute (5) is fixedly connected to the outer shell of the motor body (1). The squirrel-cage rotating drum (6) is located inside the volute (5) and connected to the motor spindle (2). The axial positioning component (7) is fixedly connected inside the volute (5) at the end away from the motor body (1) and is attached to the end of the motor spindle (2). The axial positioning assembly (7) consists of a central column (8), several support arms (9) and universal balls (10). One end of the central column (8) is fixedly connected to the end of the volute (5) away from the motor body (1) through the support arms (9). The universal balls (10) are rotatably connected to the end of the central column (8) away from the support arms (9) and fit against the end of the motor spindle (2). The end of the motor spindle (2) near the central column (8) has a groove (11) that matches the universal balls (10).

2. The OTR motor with a novel axial positioning component according to claim 1, characterized in that: An air inlet guide cone (12) is fixedly installed at the end of the central column (8) away from the universal ball bearing (10).

3. An OTR motor with a novel axial positioning component according to claim 1, characterized in that: The two ends of the arc-shaped outer surface of the squirrel-cage rotary drum (6) are rotatably connected to the inner wall of the volute (5) through ball bearing one (13) and ball bearing two (14), respectively. The end of the squirrel-cage rotary drum (6) away from the motor main shaft (2) is rotatably connected to the volute (5) through a plane bearing (15).

4. An OTR motor with a novel axial positioning component according to claim 1, characterized in that: An air inlet (16) is provided at one end of the volute (5), and an air outlet (17) is provided at the top of one side of the volute (5).

5. An OTR motor with a novel axial positioning component according to claim 1, characterized in that: A keyway (18) is provided at the center of one end of the squirrel-cage rotary drum (6), and a key (19) matching the keyway (18) is provided on the motor spindle (2).

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