Outer rotor waterproof motor

Abstract

The utility model relates to an external rotor waterproof motor, which comprises a shell, the shell comprises a first shell and a second shell, the first shell is installed on the second shell through a first screw, and the first shell is provided with a shaft output device for a motor rotating shaft to penetrate out; and the motor is arranged in the shell. The sealant consumption and the sealant pouring volume are reduced, the investment for producing a sealant pouring mold can be reduced, and the production efficiency is improved; the motor is completely sealed, the first oil seal and the second oil seal prolong the service life of the motor, the protection grade is IP68, and foreign matters are prevented from entering to rub a stator and a rotor to cause motor failure; the direct-current brushless outer rotor waterproof motor can be directly placed outside, heat dissipation of the motor is more convenient, the service life is prolonged by using the direct-current brushless outer rotor waterproof motor, and the motor output is high.

Description

Technical Field

[0001] The utility model relates to the field of motors, in particular to an outer rotor waterproof motor. Background Art

[0002] Motors working underwater have high requirements for waterproofing. To meet these requirements, existing waterproof motors have poor heat dissipation in underwater working environments. When the motor is placed in water, the internal heat will be generated, causing the gas inside the entire cavity to expand and contract due to heat and cold, as well as internal condensation, which will affect the service life of the entire machine. Utility Model Content

[0003] The utility model provides an outer rotor waterproof motor, aiming to at least solve one of the technical problems existing in the prior art.

[0004] The technical solution of the utility model is an outer rotor waterproof motor, comprising:

[0005] A housing, the housing comprising a first housing and a second housing, the first housing being mounted on the second housing by a first screw, the first housing being provided with a shaft outlet device for the motor shaft to pass through;

[0006] A motor is arranged in the housing.

[0007] Furthermore, the shaft output device includes a shaft output hole arranged above the first housing, a first oil seal and a second oil seal arranged in sequence above the shaft output hole, and also includes a mounting end plate arranged above the second oil seal.

[0008] Furthermore, grease is filled between the first oil seal and the second oil seal to reduce friction resistance between the first oil seal, the second oil seal and the rotating shaft of the motor.

[0009] Furthermore, the mounting end plate is fixed to the first shell by a second screw.

[0010] Furthermore, the second housing includes a base and a waterproof ring plate arranged around the base.

[0011] The outer side of the waterproof ring plate is provided with a first radial sealing ring, a second radial sealing ring and an axial sealing ring for tightly connecting the first shell and the second shell. The first radial sealing ring, the second radial sealing ring and the axial sealing ring are all coated with grease.

[0012] Furthermore, the base also has only a mounting seat for fastening and mounting the motor, and the mounting seat includes a motor placement platform and a harness placement slot for the motor lead harness to pass through.

[0013] The motor placement platform is provided with a third screw mounting hole for the third screw to pass through.

[0014] Furthermore, a threading hole for the motor lead-out harness to pass through is provided on the second housing, and a glue filling groove for filling with sealant is provided on the periphery of the threading hole.

[0015] Furthermore, the bottom of the motor is fixed to the second housing by a third screw, and further comprises a sealing ring bolt, which is sleeved on the third screw.

[0016] Furthermore, the outer side of the second shell is provided with mounting screw holes for overall fixation.

[0017] Furthermore, the motor is an outer rotor motor.

[0018] The beneficial effects of the present utility model are as follows:

[0019] In this application, the amount of sealant used and the volume of the glue injection are reduced, which can reduce the investment in the production of glue injection molds and improve production efficiency; the motor is completely sealed, and the first oil seal and the second oil seal increase the service life of the motor, with a protection level of IP68, to prevent foreign matter from entering and causing friction between the stator and rotor to cause the motor to fail; it can be placed directly on the outside, which is more convenient for motor heat dissipation, and the use of a DC brushless outer rotor waterproof motor increases the service life, and the motor output is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional schematic diagram of an outer rotor waterproof motor according to an embodiment of the present utility model.

[0021] Figure 2 It is a three-dimensional schematic diagram of the bottom of the outer rotor waterproof motor according to an embodiment of the present utility model.

[0022] Figure 3 It is an exploded schematic diagram of an outer rotor waterproof motor according to an embodiment of the present utility model.

[0023] Figure 4 It is a cross-sectional schematic diagram of an outer rotor waterproof motor according to an embodiment of the present utility model.

[0024] In the above figure, 100, housing; 110, first housing; 111, first screw; 112, shaft hole; 120, second housing; 121, base; 122, waterproof ring plate; 123, first radial sealing ring; 124, second radial sealing ring; 125, axial sealing ring; 126, mounting seat; 127, motor placement table; 128, wiring harness placement groove; 129, third screw mounting hole; 130, threading hole; 131, glue pouring groove; 132, third screw; 133, mounting screw hole; 140, shaft device; 141, first oil seal; 142, second oil seal; 143, mounting end plate; 144, second screw. DETAILED DESCRIPTION

[0025] The following will be combined with the embodiments and drawings to clearly and completely describe the concept, specific structure and technical effects of the present invention so as to fully understand the purpose, scheme and effect of the present invention. It should be noted that the embodiments and features in the embodiments of this application can be combined with each other unless there is a conflict.

[0026] It should be noted that, unless otherwise specified, when a feature is referred to as being "fixed" or "connected" to another feature, it may be directly fixed or connected to the other feature or indirectly fixed or connected to the other feature. In addition, the terms "upper," "lower," "left," "right," "top," and "bottom" used in this utility model are merely relative to the relative positions of the components of the utility model in the accompanying drawings.

[0027] In addition, unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art. The terms used in this specification are only for describing specific embodiments and are not intended to limit the present invention. The term "and / or" as used herein includes any combination of one or more of the related listed items.

[0028] It should be understood that although the terms first, second, third, etc. may be used to describe various elements in the present disclosure, these elements should not be limited to these terms. These terms are only used to distinguish elements of the same type from each other. For example, a first element may also be referred to as a second element, and similarly, a second element may also be referred to as a first element without departing from the scope of the present disclosure.

[0029] Reference Figures 1 to 4 In some embodiments, according to an outer rotor waterproof motor of the present invention, referring to Figure 1 and Figure 2 ,include:

[0030] The housing 100 includes a first housing 110 and a second housing 120. The first housing 110 is mounted on the second housing 120 by means of a first screw 111. The first housing 110 is provided with a shaft-exiting device 140 for the motor shaft to pass through.

[0031] A motor is provided in the housing 100 .

[0032] The beneficial effects of the present utility model are as follows:

[0033] In this application, the amount of sealant used and the volume of the glue injection are reduced, which can reduce the investment in the production of glue injection molds and improve production efficiency; the motor is completely sealed, and the first oil seal 141 and the second oil seal 142 increase the service life of the motor, with a protection level of IP68, to prevent foreign matter from entering and causing friction between the stator and rotor to cause the motor to fail; it can be placed directly on the outside, which is more convenient for motor heat dissipation, and the use of a DC brushless outer rotor waterproof motor increases the service life, and the motor output is high.

[0034] Specifically, the entire unit meets IP68 waterproofing requirements and can operate underwater at 3.5m water pressure for more than 1000 hours without abnormalities. The motor is an external rotor waterproof motor, with a first housing 110 and a second housing 120 installed externally for sealing and waterproofing. The motor uses screws with sealing rings and is sealed with sealant. The second housing 120 has openings for the motor wiring harness; a glue groove 131 is provided on the outside for filling with sealant to seal and secure the wiring harness and prevent water from entering the motor. A double oil seal design is used at the motor shaft outlet. Grease is filled between the two oil seals to increase the oil seal's service life, better protect the oil seal below, reduce friction and energy loss. Installing the end plate 143 completely secures the oil seal, preventing it from falling off during impact and vibration. A three-stage sealing structure is designed at the junction of the first housing 110 and the second housing 120, including two radial sealing rings and one axial sealing ring. Grease is applied during installation to prevent damage and facilitate installation.

[0035] Further, refer to Figure 1 、 Figure 3 and Figure 4 The shaft output device 140 includes a shaft output hole 112 arranged above the first shell 110, a first oil seal 141 and a second oil seal 142 arranged in sequence above the shaft output hole 112, and also includes a mounting end plate 143 arranged above the second oil seal 142.

[0036] Specifically, after applying grease on the first oil seal 141, pass it through the motor shaft and extend it 2 mm into the interior. Apply grease on the first oil seal 141 again, fill the gap and continue to install the second oil seal 142, and make the second oil seal 142 flush with the first shell 110. Finally, place the mounting end plate 143 along the motor axis, and fix the mounting end plate 143 to the first shell 110 through the second screw 144. Apply 680 glue on the second screw 144 and tighten the second screw 144 with a tightening force of 2 Nm. Lock the second screw 144 tightly.

[0037] After the installation is completed, the motor can be rotated flexibly by hand without any scratching or rubbing. The DC18V test motor has a no-load speed of 3200r / min and a current of less than 1A. The motor runs flexibly without any noise, and the motor communication and receiving signals are normal.

[0038] Further, refer to Figure 4 The first oil seal 141 and the second oil seal 142 are filled with grease for reducing the friction resistance between the first oil seal 141, the second oil seal 142 and the rotating shaft of the motor.

[0039] Further, refer to Figure 1 The mounting end plate 143 is fixed to the first shell 110 by a second screw 144 .

[0040] Further, refer to Figure 3 The second housing 120 includes a base 121 and a waterproof ring plate 122 disposed around the base 121.

[0041] The outer side of the waterproof ring plate 122 is provided with a first radial sealing ring 123, a second radial sealing ring 124 and an axial sealing ring 125 for tightly connecting the first shell 110 and the second shell 120. The first radial sealing ring 123, the second radial sealing ring 124 and the axial sealing ring 125 are all coated with grease.

[0042] Further, refer to Figure 3 The base 121 also has only a mounting seat 126 for fastening the motor, and the mounting seat 126 includes a motor placement platform 127 and a harness placement slot 128 for the motor lead harness to pass through.

[0043] The motor placement platform 127 is provided with a third screw mounting hole 129 for the third screw 132 to pass through.

[0044] Further, refer to Figure 2 The second housing 120 is provided with a threading hole 130 for the motor lead-out harness to pass through, and a glue potting groove 131 for filling with sealant is provided on the periphery of the threading hole 130.

[0045] Specifically, when pouring glue at the lead-out line, the wire needs to be kept vertical, and a 1:1 two-component glue dispensing device needs to be used for mixed glue pouring. Afterwards, AB glue needs to be filled on the outside of the glue pouring groove 131 for waterproof protection. The sealant needs to be filled evenly to fill the gap, and there should be no air holes or sand holes on the surface. After solidification, there should be no trace after pressing hard with your hand and releasing it.

[0046] Further, refer to Figure 1 and Figure 2 The bottom of the motor is fixed to the second housing 120 by a third screw 132 , and also includes a sealing ring bolt, which is sleeved on the third screw 132 .

[0047] Further, refer to Figures 1 to 3The outer side of the second shell 120 is also provided with mounting screw holes 133 for overall fixation.

[0048] Further, refer to Figures 1 to 3 , the motor is an outer rotor waterproof motor.

[0049] Specifically, the outer rotor waterproof motor features an underwater sealed design, with no water ingress at 3.5m water pressure. An outer rotor waterproof motor is a motor design in which the rotor is located outside the motor, while the stator is located inside. This design contrasts with traditional motors, which typically have an inner rotor, meaning the rotor is located inside and the stator is located outside. Features of outer rotor waterproof motors include: High torque density: Because the rotor is located outside, a larger rotor diameter can be designed, providing greater torque within the same volume. High efficiency: Outer rotor waterproof motors typically have higher efficiency due to the larger rotor surface area, which improves heat dissipation. Compact design: Because the rotor is located outside, a more compact motor structure can be designed. Low noise: Outer rotor waterproof motors typically run smoother and have lower noise levels. High reliability: Because the rotor has a large surface area and improves heat dissipation, the motor generally has a longer lifespan. Easy maintenance: The external rotor location makes maintenance and replacement easier. Outer rotor waterproof motors are widely used in various applications, including: Home appliances such as fans, air conditioners, and washing machines; Industrial applications such as conveyor belts and cranes. Electric vehicles: In electric vehicles, outer rotor waterproof motors can provide high torque and high efficiency, helping to improve vehicle performance and range.

[0050] In addition, to ensure waterproof performance, the outer sides of the first screw 111, the second screw 144, and the third screw 132 must be treated with waterproof glue. The glue surface must be parallel to the ground to prevent glue from flowing. Glue is applied to both sides separately, and the curing time for each glue application is no less than 2 hours. The motor surface must be clean and free of oil stains and scratches. The glue surface must be smooth and the wires must be tightly connected to the glue without any debonding.

[0051] The above description is merely a preferred embodiment of the present invention. The present invention is not limited to the aforementioned embodiments. As long as the technical effects of the present invention are achieved by the same means, any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present disclosure shall be included within the scope of protection of the present disclosure. Within the scope of protection of the present invention, its technical solutions and / or implementation methods may be modified and varied in various ways.

Claims

1. An outer rotor waterproof motor, characterized in that: include: A housing (100), the housing (100) comprising a first housing (110) and a second housing (120), the first housing (110) being mounted on the second housing (120) via a first screw (111), the first housing (110) being provided with a shaft-out device (140) for the motor shaft to pass through; The shaft outlet device (140) comprises a shaft outlet hole (112) arranged above the first housing (110), a first oil seal (141) and a second oil seal (142) arranged in sequence above the shaft outlet hole (112), and also comprises a mounting end plate (143) arranged above the second oil seal (142); A motor is provided in the housing (100).

2. The outer rotor waterproof motor according to claim 1, characterized in that: The space between the first oil seal (141) and the second oil seal (142) is filled with grease for reducing frictional resistance between the first oil seal (141), the second oil seal (142) and the rotating shaft of the motor.

3. The outer rotor waterproof motor according to claim 1, characterized in that: The mounting end plate (143) is fixed to the first housing (110) via a second screw (144).

4. The outer rotor waterproof motor according to claim 1, characterized in that: The second housing (120) comprises a base (121) and a waterproof ring plate (122) arranged around the base (121). A first radial sealing ring (123), a second radial sealing ring (124) and an axial sealing ring (125) are provided on the outer side of the waterproof ring plate (122) for tightly connecting the first shell (110) and the second shell (120), and the first radial sealing ring (123), the second radial sealing ring (124) and the axial sealing ring (125) are all coated with grease.

5. The outer rotor waterproof motor according to claim 4, characterized in that: The base (121) also has only a mounting seat (126) for fastening and mounting the motor, and the mounting seat (126) includes a motor placement platform (127) and a harness placement slot (128) for the motor lead harness to pass through. The motor placement platform (127) is provided with a third screw mounting hole (129) for the third screw (132) to pass through.

6. The outer rotor waterproof motor according to claim 1, characterized in that: The second housing (120) is provided with a threading hole (130) for the motor lead-out wire harness to pass through, and a glue filling groove (131) for filling with sealant is provided on the periphery of the threading hole (130).

7. The outer rotor waterproof motor according to claim 1, characterized in that: The bottom of the motor is fixed to the second housing (120) via a third screw (132), and further comprises a sealing ring bolt, which is sleeved on the third screw (132).

8. The outer rotor waterproof motor according to claim 1, characterized in that: The outer side of the second shell (120) is also provided with mounting screw holes (133) for integral fixation.

9. The outer rotor waterproof motor according to claim 1, characterized in that: The motor is an outer rotor motor.

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