Waterproof motor based on conjoined shaft sleeve

Abstract

The invention relates to the field of waterproof motors, and provides a waterproof motor based on a conjoined shaft sleeve, which comprises a second end cover, a main shaft, and a bearing, a conjoined shaft sleeve, a second movable impeller, a second gasket and a locking piece which are sequentially arranged on the main shaft in a sleeving manner from inside to outside and abut against one another, the second end cover is provided with a bearing chamber; the bearing is arranged in the bearing chamber; an abutting part is arranged on the side, facing the second movable impeller, of the one-piece shaft sleeve, the shape of the side, facing the second movable impeller, of the abutting part is matched with that of the second movable impeller, and the abutting part tightly abuts against the second movable impeller; and the connected shaft sleeve is inserted and matched with the second end cover. The waterproof motor solves the problem that the waterproof performance of the motor is poor.

Description

Technical Field

[0001] This application relates to the field of waterproof motors, and more particularly to a waterproof motor based on an integrated bushing. Background Technology

[0002] With the continuous development of industry, motors are being used more and more widely in various fields, especially in humid or even wet environments, which places higher demands on the waterproof performance of motors. The development of waterproof motors is of great significance for ensuring the stable operation of equipment, extending the service life of motors, and improving the reliability of the entire system. They are widely used in industries with high waterproof requirements, such as underwater robots, shipbuilding, and chemical engineering.

[0003] There is a type of motor that drives a rotating impeller through a rotor assembly, thereby generating negative pressure inside the motor's air guide shroud. This negative pressure draws material in through the air inlet of the air guide shroud and out through the side outlet, thus transferring the material. Specifically, the motor's main shaft is sequentially fitted with a bearing, a bushing, a first gasket, a rotating impeller, and a second gasket. When operating under harsh conditions, moisture may be drawn in. In this case, the moisture is generally ejected through the air inlet of the motor's air guide shroud by the high-speed rotating impeller and blown out of the motor through the side outlet. However, some of the moisture may flow into the inside of the motor, or even seep into the bearings and the motor through the gaps between the first gasket and the bushing, and between the bushing and the end cover. This can lead to water ingress and jamming of the motor bearings, or even short circuits and burnout of the conductive windings of the rotor and stator assemblies due to moisture ingress. Summary of the Invention

[0004] To address the problem of poor waterproof performance of motors, this application provides a waterproof motor based on an integrated shaft sleeve.

[0005] The waterproof motor based on an integrated bushing provided in this application adopts the following technical solution: A waterproof motor based on a one-piece bushing includes: a second end cover, a main shaft, and bearings, a one-piece bushing, a second impeller, a second washer, and a locking element that are sequentially sleeved on the main shaft from the inside out and abut against each other. The second end cover has a bearing chamber, and the bearing is disposed in the bearing chamber; The integrated bushing has an abutment portion on the side facing the second moving impeller. The shape of the abutment portion facing the second moving impeller is adapted to the second moving impeller, and the abutment portion abuts tightly against the second moving impeller. The integrated bushing is inserted into the second end cover.

[0006] By adopting the above technical solution, the bearing, the integrated bushing, the second moving impeller, the second washer, and the locking element, which are sequentially fitted onto the main shaft from the inside out and abut against each other, can form a stable structure. The structure can rotate with the main shaft due to the friction between the components. In addition, the integrated bushing abuts against the second moving impeller, which simplifies the assembly process and reduces the probability of water ingress compared to the prior art. The integrated bushing and the second end cover are inserted into each other, making the gap between them tortuous and preventing water vapor from entering, which can further enhance the waterproof performance of the motor.

[0007] Optionally, there is a gap between the edge of the second moving impeller facing the integrated shaft sleeve and the second end cover, and the edge of the second moving impeller facing the integrated shaft sleeve is provided with centrifugal blades; the centrifugal blades are configured as follows: When the second impeller rotates, the centrifugal blades can throw the water vapor located in the gap between the side of the second impeller facing the integrated shaft sleeve and the second end cover to the outside of the second impeller.

[0008] By adopting the above technical solution, centrifugal blades are provided on the edge of the second moving impeller. When the second moving impeller rotates, the centrifugal blades can throw the water vapor in the gap between the second moving impeller and the second end cover to the outside of the second moving impeller, thereby enhancing the waterproof performance of the motor and preventing water vapor from entering the motor from the gap between the second moving impeller and the second end cover.

[0009] Optionally, the integrated bushing has a plurality of first protrusions spaced radially on one side facing the bearing, and a first groove is formed between adjacent first protrusions. The second end cap is provided with a plurality of second protrusions spaced radially apart, and a second groove is formed between adjacent second protrusions; When the integrated bushing abuts against the bearing, the first protrusion is inserted into the second groove, and the second protrusion is inserted into the first groove.

[0010] By adopting the above technical solution, the integrated bushing is provided with multiple first protrusions and first grooves on the bearing side, and multiple second protrusions and second grooves are provided on the second end cover. The first protrusions are inserted into the second grooves and the second protrusions are inserted into the first grooves, forming a labyrinth structure, which increases the flow path and resistance of the fluid and further enhances the waterproof performance of the waterproof motor.

[0011] Optionally, the first groove and the second groove are filled with grease.

[0012] By adopting the above technical solution, in the waterproof motor based on the integrated shaft sleeve, the integrated shaft sleeve abutting part is in close contact with the second moving impeller and the integrated shaft sleeve is inserted into the second end cover. The first groove and the second groove are filled with grease, which can further enhance the waterproof performance of the waterproof motor and prevent water vapor from entering the motor through the insertion point of the first protrusion and the second groove, and the second protrusion and the first groove.

[0013] Optionally, both the first protrusion and the second protrusion are annular.

[0014] By adopting the above technical solution, based on the following components: a second end cover, a main shaft, a bearing sleeved on the main shaft, an integral bushing, a second moving impeller, a second gasket, and a locking element, the second end cover has a bearing chamber, the bearing is located in the bearing chamber, the integral bushing has an abutment portion facing the second moving impeller and tightly abuts against the second moving impeller and is inserted into the second end cover, the integral bushing has multiple first protrusions spaced radially on the side facing the bearing and forming a first groove between adjacent protrusions, and the second end cover has multiple second protrusions spaced radially and forming a second groove between adjacent protrusions, with the first protrusions and second grooves inserted into each other, and the second protrusions and first grooves inserted into each other, the first protrusions and second protrusions are made into rings, which makes the insertion and cooperation of the first protrusions and second grooves, and the second protrusions and first grooves more regular and stable, enhances the sealing and stability of the structure, can block water vapor from entering 360°, and further improves the waterproof performance of the waterproof motor.

[0015] Optionally, the plurality of first protrusions have identical shapes; or, The shapes of the multiple first protrusions are not exactly the same.

[0016] By adopting the above technical solution, the integrated bushing has a first protrusion and a first groove on the bearing side, and a second protrusion and a second groove on the second end cover. The first protrusion and the second groove are inserted into each other, and the second protrusion and the first groove are inserted into each other. The shapes of the multiple first protrusions are either completely the same or not completely the same. Completely the same shape can facilitate production and manufacturing, improve production efficiency and reduce costs. Not completely the same shape can be flexibly designed according to actual needs to optimize the performance of the waterproof motor. For example, setting different shapes of first protrusions can change the gap path between the integrated bushing and the second end cover, thereby enhancing the waterproof effect. In addition, setting different shapes of first protrusions can also change the width of the gap between the first protrusion and the first groove at different parts. The larger the gap, the more grease is contained, while the smaller the gap, the less grease is contained but the less likely the grease is to leak. By setting different shapes of first protrusions, the waterproof performance is further improved.

[0017] Optionally, both the first protrusion and the second protrusion are provided with a wave texture.

[0018] By adopting the above technical solution, the integrated bushing and the second end cover are inserted and fitted together, and the abutting part is tightly abutted against the second moving impeller. At the same time, the first protrusion at the abutting part of the integrated bushing and the bearing is inserted into the second groove of the second end cover, and the second protrusion is inserted into the first groove, and the groove is filled with grease. On this basis, the first protrusion and the second protrusion are provided with a wave texture, which can further increase the contact area. The grease can be retained on the wave texture, reducing the risk of leakage and enhancing the waterproof performance.

[0019] Optionally, the surface of the contact portion has a rough texture.

[0020] By adopting the above technical solution, the rough texture on the surface of the contact part can increase the friction between the contact part and the second moving impeller, making the two contact more tightly and further improving the waterproof performance of the waterproof motor. At the same time, the friction between the two is also greater, ensuring that the two rotate synchronously with the main shaft.

[0021] Optionally, the locking element includes a nut, which is threadedly connected to the spindle.

[0022] By adopting the above technical solution, using a nut as a locking element and connecting it to the spindle thread, the various components can be easily and firmly fixed on the spindle, ensuring the stability of the motor structure.

[0023] In summary, this application includes at least one of the following beneficial technical effects: 1. The integrated bushing and the second end cover are inserted into each other, and the abutting part of the integrated bushing is in close contact with the second moving impeller, which can effectively prevent water from entering the motor and improve the motor's waterproof performance; 2. Centrifugal blades are provided on the edge of the second moving impeller. When the second moving impeller rotates, the centrifugal blades can throw the water vapor in the gap between the second moving impeller and the second end cover to the outside of the second moving impeller, preventing water vapor from subsequently entering the motor from the gap between the integrated shaft sleeve and the second end cover. 3. The first and second grooves are filled with grease to enhance waterproof performance; the first protrusion is inserted into the second groove and the second protrusion is inserted into the first groove, and the shapes of the multiple first protrusions are not exactly the same, thereby changing the gap path and width between the integrated bushing and the second end cap, which helps to enhance the waterproof effect and prevent grease leakage. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of an electric motor in the prior art; Figure 2 It is provided by existing technology Figure 1 Enlarged view of point A in the middle; Figure 3 This is a partial three-dimensional structural diagram of an electric motor in the prior art; Figure 4This is a schematic diagram of the waterproof motor based on the integrated bushing in Embodiment 1 provided in this application; Figure 5 This application provides Figure 4 Enlarged view of point B in the middle; Figure 6 This is a partial three-dimensional structural diagram of the waterproof motor based on the integrated bushing in Embodiment 1 provided in this application; Figure 7 This is a three-dimensional structural diagram of the integrated bushing of the waterproof motor based on the integrated bushing in Embodiment 1 of this application; Figure 8 This is a schematic diagram of the waterproof motor based on the integrated bushing in Embodiment 2 provided in this application.

[0025] Explanation of reference numerals in the attached figures: 1. Main shaft; 2. Bearing; 3. Shaft sleeve; 4. First gasket; 5. First moving impeller; 6. First end cover; 7. Second end cap; 71. Second protrusion; 72. Second groove; 8. Integrated bushing; 81. Abutting part; 82. First protrusion; 83. First groove; 9. Second moving impeller; 91. Centrifugal blades; 10. Second gasket; 11. Locking element. Detailed Implementation

[0026] Figure 1 This is a schematic diagram of the structure of an electric motor in the prior art; Figure 2 It is provided by existing technology Figure 1 Enlarged view of point A in the middle; Figure 3 This is a partial three-dimensional structural diagram of an electric motor in the prior art. The main shaft 1 is fitted with a bearing 2, a bushing 3, a first washer 4, a first impeller 5, and a locking element 11 from the inside out. Figure 1 The direction of the middle arrow indicates the flow direction of water vapor when the motor is working. It can be seen that when the motor is working, some water vapor enters the inside of the air guide shroud and is thrown out by the action of the first impeller 5, and is blown out of the motor through the air outlet next to the air guide shroud. Some water vapor may also enter the motor through the gap between the bushing 3 and the adjacent first gasket 4, and between the bushing 3 and the first end cover 6, and affect the normal operation of the motor.

[0027] The following is in conjunction with the appendix Figures 4 to 7 This application will be described in further detail.

[0028] Example 1 like Figures 4 to 7As shown in the figure, this application discloses a waterproof motor based on an integrated bushing. The motor housing and the second end cover 7 together form a cavity, which is used to house the motor's rotor, stator, and other components. Specifically, the motor's main shaft 1 is fitted with a bearing 2, an integrated bushing 8, a second impeller 9, a second gasket 10, and a locking member 11 in sequence from the inside to the outside.

[0029] The second end cover 7 is made of metal, such as aluminum alloy, which has a certain strength and corrosion resistance. Alternatively, it can be made of engineering plastic, such as polycarbonate, which is lightweight and has good insulation properties. The second end cover 7 has a bearing chamber, a recessed cavity whose shape is adapted to the outer ring of the bearing 2, ensuring that the bearing 2 can be securely installed within it. This adaptive design makes the bearing 2 more stable during operation, reducing vibration and noise. The locking element 11 is a nut. The end of the main shaft 1 has threads, and the locking element 11 is threaded to the main shaft 1. The nut can be a standard hexagonal nut or other specially shaped nuts. By tightening the nut, the second washer 10, the second impeller 9, the integrated bushing 8, and the bearing 2 can be tightly fixed together, ensuring the stability of the entire structure.

[0030] Specifically, the inner ring of bearing 2, the integrated bushing 8, the second moving impeller 9, the second washer 10, and the locking element 11 abut against each other, with the locking element 11 serving as a limiting element. When the main shaft 1 rotates, the inner ring of bearing 2, the integrated bushing 8, the second moving impeller 9, the second washer 10, and the locking element 11 rotate with the main shaft 1, creating negative pressure through the second moving impeller 9 to transfer materials.

[0031] The integrated bushing 8 has an abutment portion 81 on the side facing the second moving impeller 9. In this embodiment, the abutment portion 81 can be an annular protrusion, and its shape on the side facing the second moving impeller 9 is adapted to the second moving impeller 9, so that the integrated bushing 8 can directly and tightly abut against the second moving impeller 9 through the abutment portion 81, compared to Figure 1 The assembly process is simplified by having the first gasket 4 abut against the first impeller 5, making it difficult for moisture to enter between the abutment part 81 and the second impeller 9, thus reducing the risk of water ingress. Furthermore, by ensuring a full fit between the abutment part 81 and the second impeller 9, the contact area between them is increased, preventing relative slippage.

[0032] Furthermore, the surface of the contact portion 81 has a rough texture, which can increase the friction between the integral second end cover 7 and the second moving impeller 9 and prevent relative slippage.

[0033] Furthermore, the integrated bushing 8 and the second end cap 7 are inserted into each other. Specifically, the integrated bushing 8 has an annular structure, and multiple first protrusions 82 are radially spaced on the side of the integrated bushing 8 facing the bearing 2. The first protrusions 82 are annular. An annular first groove 83 is formed between adjacent first protrusions 82. The second end cap 7 has multiple annular second protrusions 71 radially spaced, and an annular second groove 72 is formed between adjacent second protrusions 71. When the integrated bushing 8 abuts against the bearing 2, the first protrusions 82 insert into the second grooves 72, and the second protrusions 71 insert into the first grooves 83, thereby forming a labyrinth structure. That is, when water vapor passes through the gap between the integrated bushing 8 and the second end cap 7 from the outside to the inside, its movement path is a curved shape. This labyrinth structure can effectively block the entry of water vapor, thereby improving the waterproof performance.

[0034] The first groove 83 and the second groove 72 are filled with grease. The grease has a lubricating and sealing function. On the one hand, it can reduce friction between parts and reduce wear; on the other hand, the grease can further prevent water from entering, forming an additional waterproof sealing layer. Both the first protrusion 82 and the second protrusion 71 are provided with a wavy texture. The wavy texture can increase the contact area with the grease, better absorb and retain the grease, and improve the waterproof effect.

[0035] In some embodiments, the plurality of first protrusions 82 have identical shapes, which facilitates production. In this embodiment, the cross-section of the first protrusion 82 may be rectangular.

[0036] In other embodiments, the shapes of the multiple first protrusions 82 are not entirely identical, resulting in variations in the width and shape of the gaps between each first protrusion 82 and the second groove 72. In practice, the shape of the first protrusions 82 can be designed according to actual needs. For example, for areas between the first protrusions 82 and the second groove 72 that are prone to wear or water ingress, the width of the corresponding portion of the gap between the first protrusions 82 and the second groove 72 can be altered to allow for a more suitable amount of grease storage in the corresponding area, thereby improving lubrication and waterproofing performance.

[0037] The shape of the second protrusion 71 can be set according to the shape of the first protrusion 82.

[0038] The implementation principle of this embodiment is as follows: This embodiment forms a multi-layered waterproof structure through the rational combination and tight cooperation of components such as the second end cover 7, main shaft 1, bearing 2, integrated bushing 8, second moving impeller 9, second gasket 10, and locking element 11. The tight contact between the integrated bushing 8 and the second moving impeller 9, the concave-convex insertion structure with the second end cover 7, and the grease filling design effectively prevent water from entering. Compared with existing technologies, this significantly improves the motor's waterproof capability in humid and watery environments, reduces motor failures caused by water intrusion, extends the motor's service life, and improves the reliability and stability of the equipment. It represents a significant improvement over existing technologies and meets the stringent requirements for motor waterproof performance in complex environments.

[0039] Example 2 like Figure 8 As shown, the difference between this embodiment and Embodiment 1 is that, in the radial direction along the main shaft 1, the width of the second moving impeller 9 is greater than the width of the connecting sleeve 8. There is a gap between the edge of the second moving impeller 9 facing the connecting sleeve 8 and the second end cover 7. The edge of the second moving impeller 9 facing the connecting sleeve 8 is provided with centrifugal blades 91. When the second moving impeller 9 rotates, the centrifugal blades 91 can throw the water vapor located in the gap between the side of the second moving impeller 9 facing the connecting sleeve 8 and the second end cover 7 to the outside of the second moving impeller 9, and finally discharge it from the air outlet next to the second moving impeller 9, further improving the waterproof performance.

[0040] Centrifugal blades 91 are generally made of plastic or aluminum alloy, which have the advantages of being lightweight and high-strength. Their shape is usually curved and sheet-like, so as to generate sufficient centrifugal force when rotating.

[0041] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A waterproof motor based on an integrated bushing, characterized in that, include: The second end cap (7), the main shaft (1), and the bearing (2), the integral bushing (8), the second impeller (9), the second gasket (10), and the locking element (11) that are sequentially sleeved on the main shaft (1) from the inside to the outside and abut against each other; The second end cap (7) has a bearing chamber, and the bearing (2) is disposed in the bearing chamber; The integrated bushing (8) has an abutment part (81) on the side facing the second moving impeller (9). The shape of the abutment part (81) facing the second moving impeller (9) is adapted to the second moving impeller (9). The abutment part (81) abuts tightly with the second moving impeller (9). The integrated bushing (8) is inserted into the second end cover (7).

2. The waterproof motor based on an integrated bushing as described in claim 1, characterized in that: There is a gap between the edge of the second moving impeller (9) facing the integrated shaft sleeve (8) and the second end cover (7), and the edge of the second moving impeller (9) facing the integrated shaft sleeve (8) is provided with centrifugal blades (91); the centrifugal blades (91) are configured as follows: When the second impeller (9) rotates, the centrifugal blades (91) can throw the water vapor located in the gap between the side of the second impeller (9) facing the integrated bushing (8) and the second end cover (7) to the outside of the second impeller (9).

3. The waterproof motor based on an integrated bushing according to claim 1, characterized in that: The integrated bushing (8) is provided with a plurality of first protrusions (82) spaced radially. The first protrusions (82) are located on the side of the integrated bushing (8) facing the bearing (2), and a first groove (83) is formed between adjacent first protrusions (82). The second end cap (7) is provided with a plurality of second protrusions (71) spaced radially, and a second groove (72) is formed between adjacent second protrusions (71). When the integrated bushing (8) abuts against the bearing (2), the first protrusion (82) is inserted into the second groove (72), and the second protrusion (71) is inserted into the first groove (83).

4. The waterproof motor based on an integrated bushing according to claim 3, characterized in that: The first groove (83) and the second groove (72) are filled with grease.

5. The waterproof motor based on an integrated bushing according to claim 3, characterized in that: Both the first protrusion (82) and the second protrusion (71) are annular.

6. The waterproof motor based on the integrated bushing according to claim 3, characterized in that: The multiple first protrusions (82) are all identical in shape; or, The shapes of the multiple first protrusions (82) are not exactly the same.

7. The waterproof motor based on an integrated bushing according to claim 4, characterized in that: Both the first protrusion (82) and the second protrusion (71) are provided with wave texture.

8. The waterproof motor based on the integrated bushing according to claim 1, characterized in that: The surface of the contact part (81) has a rough texture.

9. The waterproof motor based on the integrated bushing according to claim 1, characterized in that: The locking member (11) includes a nut and is threadedly connected to the main shaft (1).

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