Underwater brushless hub motor

Abstract

The utility model discloses an underwater brushless wheel hub motor which comprises a motor shell, a main battery cell and a main shaft are arranged in the motor shell, one end of the main shaft is arranged in the motor shell through a bearing, the other end of the main shaft extends out of the motor shell, and the motor shell comprises a front shell body and a rear shell body. A first sealing piece is arranged at the connecting position of the front shell and the rear shell, and a mechanical sealing assembly is arranged at the connecting position of the main shaft and the motor shell. The graphite sealing ring and the ceramic sealing ring are adopted for sealing, so that the main shaft is stressed to deform and cannot leak water, the main shaft cannot be damaged even if the water quality is poor, and the problems of poor stability and non-durability are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of brushless motors, in particular to an underwater brushless hub motor. Background Art

[0002] For robots or equipment operating underwater, brushless hub motors are usually used as propulsion power. For example, the brushless hub motor of a sewage pipe clearing robot needs to be waterproof and sealed when working underwater. Since there are many structural parts that may cause water leakage in the motor, the waterproof sealing in the existing technology is not thorough enough, and the sealing method generally uses rubber rings. When the motor shaft is deformed under force, the rubber sealing ring is prone to leakage, resulting in poor stability. If the water quality is poor, the rubber sealing ring is easily damaged, resulting in poor durability and the need for regular replacement. Utility Model Content

[0003] In order to address the deficiencies of the prior art, the present application provides an underwater brushless hub motor, comprising a motor housing, wherein a main battery core and a main shaft are arranged in the motor housing, one end of the main shaft is arranged in the motor housing through a bearing, and the other end extends out of the motor housing, the motor housing comprises a front housing and a rear housing, a first seal is arranged at the connection between the front housing and the rear housing, and a mechanical seal assembly is arranged at the connection between the main shaft and the motor housing.

[0004] Furthermore, the front shell has a first installation cavity and a second installation cavity, the rear shell has a third installation cavity, the main battery cell is installed in the second installation cavity and the third installation cavity, and the mechanical sealing assembly is arranged in the first installation cavity.

[0005] Furthermore, the mechanical seal assembly includes a mechanical seal static ring and a mechanical seal dynamic ring which are arranged in parallel on the outer side of the main shaft.

[0006] Furthermore, the mechanical seal static ring adopts a ceramic seal ring, and the mechanical seal dynamic ring adopts a graphite seal ring.

[0007] Furthermore, the bearing includes a front bearing and a rear bearing, the front bearing is installed in the second installation cavity, the graphite sealing ring is arranged between the ceramic sealing ring and the front bearing, and the rear bearing is installed in the third installation cavity.

[0008] Furthermore, a spring is provided between the ceramic sealing ring and the front bearing.

[0009] Furthermore, the ceramic sealing ring is arranged in contact with the inner wall of the first installation cavity, and a gap is left between the graphite sealing ring and the inner wall of the first installation cavity.

[0010] Furthermore, the first sealing member is a rubber sealing ring.

[0011] Furthermore, an axial threading hole is provided on the main shaft along its protruding end.

[0012] The benefit of this application is that the underwater brushless hub motor provided seals the main shaft by using a graphite sealing ring and a ceramic sealing ring at the same time, and the sealing is relatively thorough. At the same time, the main shaft will not leak when it is deformed by force, and will not be damaged even if the water quality is poor, thus solving the problems of poor stability and durability. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic structural diagram of an embodiment of the underwater brushless hub motor of the present application;

[0014] Figure 2 for Figure 1 Cross-sectional view;

[0015] Figure 3 for Figure 1 Schematic diagram of the center front housing structure;

[0016] Figure 4 for Figure 1 Schematic diagram of the center and rear shell structure.

[0017] Marked in the figure: 10, front shell, 101, first mounting cavity, 102, second mounting cavity, 103, outer stop, 11, rear shell, 111, third mounting cavity, 112, inner stop, 12, main shaft, 121, threading hole, 13, main battery cell, 14, front bearing, 15, rear bearing, 16, first seal, 17, ceramic sealing ring, 18, graphite sealing ring. DETAILED DESCRIPTION

[0018] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.

[0019] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0020] In this application, terms such as "upper," "lower," "left," "right," "front," "back," "top," "bottom," "inner," "outer," "center," "vertical," "horizontal," "transverse," and "longitudinal" indicate positions or locations based on the positions or locations shown in the accompanying drawings. These terms are primarily intended to better describe this application and its embodiments and are not intended to limit the devices, elements, or components indicated to having a specific orientation, or to being constructed or operated in a specific orientation.

[0021] Furthermore, some of the above terms may be used to express other meanings besides indicating a position or location. For example, the term "on" may also be used to indicate a dependency or connection in certain circumstances. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0022] Furthermore, the terms "installed," "disposed," "provided with," "connected," "connected," and "socketed" should be interpreted broadly. For example, they can refer to fixed connections, removable connections, or integral structures; mechanical connections or electrical connections; direct connections, indirect connections through an intermediary, or internal communication between two devices, elements, or components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0023] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0024] See also Figures 1-4This embodiment provides an underwater brushless hub motor, including a motor housing. The motor housing is divided into a front housing 10 and a rear housing 11, which are connected by bolts to facilitate the installation of other structures inside. A main shaft 12 and a main battery core 13 are commonly provided in the front housing and the rear housing, wherein the main shaft 12 is respectively installed in the housing through a front bearing 14 and a rear bearing 15 and extends out of the front housing. A first seal 16 is provided at the connection between the front housing and the rear housing, and a mechanical seal assembly is provided at the connection between the main shaft 12 and the front housing 10.

[0025] Specifically, the front shell 10 has a first installation cavity 101 and a second installation cavity 102, the rear shell 11 has a third installation cavity 111, the main battery cell 13 is installed in the second installation cavity 102 and the third installation cavity 111, and the mechanical seal assembly includes a mechanical seal static ring and a mechanical seal dynamic ring arranged in parallel on the outside of the main shaft. The mechanical seal static ring and the mechanical seal dynamic ring are both arranged in the first installation cavity 101.

[0026] In order to overcome the problems of poor sealing stability and durability in the prior art, a ceramic sealing ring 17 is used for the mechanical seal static ring, and a graphite sealing ring 18 is used for the mechanical seal dynamic ring. Both are annular structures, wherein the ceramic sealing ring is arranged close to the outside of the front shell body and abuts against the inner wall of the first mounting cavity 101. Since the graphite sealing ring has good corrosion resistance, good compression resilience and high strength, a certain gap can be left between the graphite sealing ring and the inner wall of the first mounting cavity.

[0027] Specifically, a stepped hole is opened in the first installation cavity 101, which is used to install a ceramic sealing ring, a graphite sealing ring and a front bearing respectively. A spring (not shown in the figure) is also provided between the graphite sealing ring 18 and the front bearing 14 to press the ceramic sealing ring and the graphite sealing ring. The rear bearing is installed in the third installation cavity 111. In addition, an axial threading hole 121 is opened on the main shaft 12 along its protruding end, and the other end of the threading hole 121 passes through the side wall of the main shaft for connecting the wiring harness to the main battery cell.

[0028] Specifically, an outer stop 103 is provided on the end face of the front shell 10, and an inner stop 112 is provided on the end face of the rear shell 11. After the front shell and the rear shell are installed together, a space is left between the inner stop 112 and the outer stop 103. The first sealing member 16 is a rubber sealing ring, which is installed in the space to seal between the front shell and the rear shell.

[0029] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An underwater brushless hub motor, comprising a motor housing, wherein a main battery core and a main shaft are arranged in the motor housing, one end of the main shaft is arranged in the motor housing through a bearing, and the other end extends out of the motor housing, characterized in that: The motor housing comprises a front housing and a rear housing, a first sealing member is arranged at the connection between the front housing and the rear housing, and a mechanical sealing assembly is arranged at the connection between the main shaft and the motor housing.

2. The underwater brushless hub motor according to claim 1, characterized in that: The front shell has a first installation cavity and a second installation cavity, the rear shell has a third installation cavity, the main battery cell is installed in the second installation cavity and the third installation cavity, and the mechanical sealing assembly is arranged in the first installation cavity.

3. The underwater brushless hub motor according to claim 2, characterized in that: The mechanical seal assembly comprises a mechanical seal static ring and a mechanical seal dynamic ring which are sleeved in parallel on the outer side of the main shaft.

4. The underwater brushless hub motor according to claim 3, characterized in that: The mechanical seal static ring adopts a ceramic seal ring, and the mechanical seal dynamic ring adopts a graphite seal ring.

5. The underwater brushless hub motor according to claim 4, characterized in that: The bearing comprises a front bearing and a rear bearing, the front bearing is mounted in the second mounting cavity, the graphite sealing ring is arranged between the ceramic sealing ring and the front bearing, and the rear bearing is mounted in the third mounting cavity.

6. The underwater brushless hub motor according to claim 5, characterized in that: A spring is arranged between the ceramic sealing ring and the front bearing.

7. The underwater brushless hub motor according to claim 4, characterized in that: The ceramic sealing ring is arranged in contact with the inner wall of the first installation cavity, and a gap is left between the graphite sealing ring and the inner wall of the first installation cavity.

8. The underwater brushless hub motor according to claim 1, characterized in that: The first sealing member is a rubber sealing ring.

9. The underwater brushless hub motor according to claim 1, characterized in that: An axial threading hole is arranged on the main shaft along its extended end.

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