Waterproof structure of motor output shaft end and motor using same

Abstract

The utility model relates to the technical field of motors, in particular to a waterproof structure of a motor output shaft end and a motor using the waterproof structure. The waterproof ring at least comprises a small circular ring part and a large circular ring part which are coaxially connected; the outer diameter of the large circular ring part is larger than that of the small circular ring part; coaxial through shaft holes suitable for a motor output shaft to penetrate through are formed in the small circular ring part and the large circular ring part; the end face, back to the large ring part, of the small ring part faces a bearing on the motor output shaft. The convex fins are uniformly distributed around the shaft hole at intervals on the end face, back to the small circular ring part, of the large circular ring part. According to the utility model, the stability of the waterproof effect of the motor output shaft end can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of household motors, in particular to a waterproof structure at the shaft end of a motor and a motor using the same. Background Art

[0002] The enclosed water pump motor has the advantages of strong protection performance and simple maintenance, and is widely used in the fields of swimming pools or irrigation. For the motors used in this field, due to the high environmental humidity, the bearings at the output shaft end of the motor are likely to fail due to the erosion of water vapor and dust, resulting in the abnormal operation of the motor. Through actual research, it is found that for the enclosed water pump motor, the bearing failure has become one of the main reasons for reducing the overall life of the motor.

[0003] Based on the above situation, in order to enhance the waterproof performance of the motor, a waterproof cover is usually pressed on the convex bearing chamber of the motor end cover to form a waterproof structure. Among them, a waterproof ring is arranged under the waterproof cover to further enhance the waterproof performance. For example, the motor waterproof structure and the motor disclosed in the patent publication number CN205407458U use a waterproof ring sleeved on the shaft, including a base plate and blades arranged on the base plate. For the waterproof ring based on this structure, it only has a single water isolation effect. When this single effect fails or the water isolation is not good, it will lead to the problem of poor waterproofing at the output shaft of the motor.

[0004] Therefore, in view of the problem of improving the stability of the waterproof effect at the shaft end of the motor, it is necessary to further optimize and improve the structure of the waterproof ring. Summary of the Utility Model

[0005] The first object of the utility model is to provide a waterproof structure at the shaft end of a motor to solve the technical problem of improving the stability of the waterproof effect at the shaft end of the motor.

[0006] The second object of the utility model is to provide a motor to solve the technical problem of improving the stability of the waterproof effect at the shaft end of the motor.

[0007] The waterproof structure at the shaft end of the motor of the utility model is realized as follows:

[0008] A waterproof structure at the shaft end of a motor includes: a waterproof ring for sleeving on the output shaft of the motor;

[0009] The waterproof ring at least includes a small ring portion and a large ring portion connected coaxially; wherein the outer diameter of the large ring portion is greater than that of the small ring portion; a shaft hole that is coaxially penetrated and suitable for the output shaft of the motor to penetrate is formed in the small ring portion and the large ring portion;

[0010] The end face of the small ring portion facing away from the large ring portion faces the bearing on the output shaft of the motor; and

[0011] At least three convex fins that are spaced apart and evenly distributed around the shaft hole on the end surface of the large ring portion facing away from the small ring portion.

[0012] In an alternative embodiment of the present utility model, the motor output shaft is in interference fit with the shaft hole.

[0013] In an alternative embodiment of the present utility model, each of the convex fins has a rectangular structure; and

[0014] The length direction of the convex fin extends along the radial direction of the large ring portion.

[0015] In an alternative embodiment of the present utility model, at least three convex fins on the large ring portion are spirally distributed around the shaft hole.

[0016] In an alternative embodiment of the present utility model, the end surface of the small ring portion facing away from the large ring portion is provided with a protruding annular extension portion;

[0017] The outer diameter of the annular extension portion is smaller than the outer diameter of the small ring portion.

[0018] In an alternative embodiment of the present utility model, an annular step adapted to abut against the annular extension portion is formed on the motor output shaft.

[0019] In an alternative embodiment of the present utility model, a connecting portion is further provided between the small ring portion and the large ring portion;

[0020] The outer diameter of the small ring portion is greater than the outer circumferential dimension of the connecting portion.

[0021] In an alternative embodiment of the present utility model, the small ring portion, the connecting portion, and the large ring portion are integrally formed by an elastic material.

[0022] In an alternative embodiment of the present utility model, at least one protruding positioning portion is further provided on the inner wall of the shaft hole, and correspondingly, a positioning groove adapted to be inserted one by one by the positioning portion is formed on the outer side wall of the motor output shaft.

[0023] The motor of the present utility model is realized as follows:

[0024] A motor, comprising: the waterproof structure at the output shaft end of the motor as described above, and a motor end cover adapted for the motor output shaft to pass through; wherein

[0025] A bearing installation chamber is provided in the motor end cover; and

[0026] A bearing adapted to cooperate with the motor output shaft is provided in the bearing installation chamber.

[0027] With the above technical solution, the present utility model has the following beneficial effects: For the waterproof structure at the motor output shaft end of the present utility model and the motor using the same, firstly, through the cooperation of the large ring portion and the small ring portion, a double waterproof barrier can be formed for the part where the motor output shaft penetrates the motor end cover. Even if the waterproofing of the large ring portion fails, the waterproofing effect can still be ensured under the action of the small ring portion. In addition, a centrifugal fan is formed between the convex fins on the large ring portion and the large ring portion. At this time, the convex fins act as the fan blades. When the motor output shaft drives the waterproof ring to rotate rapidly as a whole, the evenly distributed structure of its convex fins can achieve good balance. At the same time, the air flow is driven by the centrifugal force. At this time, the rapid air flow forms a wind wall around the surface of the motor end cover, and the wind wall effectively blocks the entry of water vapor and dust into the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 The figure shows a schematic structural diagram of the waterproof structure at the motor output shaft end of the present utility model applied to the motor output shaft end;

[0029] Figure 2 The figure shows a schematic structural diagram of the large ring portion of the waterproof ring of the waterproof structure at the motor output shaft end of the present utility model;

[0030] Figure 3 The figure shows a schematic structural diagram of the waterproof ring of the waterproof structure at the motor output shaft end of the present utility model;

[0031] Figure 4 The figure shows a schematic structural diagram of the mating structure of the waterproof ring of the waterproof structure at the motor output shaft end of the present utility model and the motor output shaft;

[0032] Figure 5 The figure shows a schematic structural diagram of the motor end cover mated with the waterproof structure at the motor output shaft end of the present utility model.

[0033] In the figure: motor output shaft 1, annular step 11, waterproof ring 2, small ring portion 21, large ring portion 22, shaft hole 23, connecting portion 24, annular extension portion 25, bearing 3, motor end cover 4, annular boss 41, inner wall 411, convex fin 5, wind wall 6, positioning portion 71, positioning groove 72, bearing installation chamber 8. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0034] In order to make the content of the present utility model easier to be clearly understood, the present utility model will be further described in detail below according to specific embodiments and in conjunction with the accompanying drawings.

[0035] Embodiment 1:

[0036] Please refer to Figures 1 to 5As shown in the figure, this embodiment provides a waterproof structure at the output shaft end of a motor, including a waterproof ring 2 sleeved on the output shaft 1 of the motor. It should be noted that the waterproof ring 2 in this embodiment is mainly designed in combination with the waterproof requirement of one side end when the motor output shaft 1 passes through the bearing 3 installation cavity of the motor end cover 4.

[0037] Specifically, the structure of the waterproof ring 2 adopted in this example is as follows:

[0038] First of all, the overall waterproof ring 2 at least includes a small ring part 21 and a large ring part 22 connected coaxially; the outer diameter of the large ring part 22 is larger than that of the small ring part 21; a shaft hole 23 that is coaxially penetrated and suitable for the motor output shaft 1 to penetrate is formed in the small ring part 21 and the large ring part 22. The end face of the small ring part 21 facing away from the large ring part 22 faces the bearing 3 on the motor output shaft 1.

[0039] Secondly, at least three convex fins 5 are spaced and evenly distributed around the shaft hole 23 on the end face of the large ring part 22 facing away from the small ring part 21. In the attached drawings of this embodiment, the case of designing four convex fins 5 is taken as an example.

[0040] Regarding the convex fins 5 adopted in this embodiment, in the first optional implementation case, each convex fin 5 has a rectangular structure, and the shapes and sizes of these four convex fins 5 are the same. The length direction of the convex fin 5 extends along the radial direction of the large ring part 22, that is, the four convex fins 5 form an orthogonally distributed structure on the large ring part 22. In the second optional implementation case, the four convex fins 5 on the large ring part 22 are spirally distributed around the shaft hole 23. At this time, the shape of the convex fin 5 can be arc-shaped or other shapes, and this embodiment does not make an absolute limitation on this.

[0041] A centrifugal fan is formed between the convex fins 5 on the large ring part 22 and the large ring part 22. At this time, the convex fins 5 act as the function of fan blades. When the motor output shaft 1 drives the whole waterproof ring 2 to rotate rapidly, the uniformly distributed structure of its convex fins 5 can obtain good balance, and at the same time drive the air flow through the centrifugal force (the air flow direction F is shown in Figure 3 ). At this time, the rapid air flow forms a wind wall 6 around the surface of the motor end cover 4, and the wind wall 6 effectively blocks the entry of water vapor and dust into the motor. If there are water droplets splashing on the surface of the large ring part 22 outside, the water droplets can also be thrown to the inner wall 411 of the annular boss 41 of the motor end cover 4 under the action of centrifugal force, and the water droplets flow down along the inner wall 411 of the annular boss 41 of the motor end cover 4 under the action of gravity.

[0042] On the basis of the above structure, furthermore, a convex annular extension portion 25 is provided on the end surface of the small ring portion 21 facing away from the large ring portion 22; the outer diameter of the annular extension portion 25 is smaller than the outer diameter of the small ring portion 21. In this regard, an annular step 11 adapted to abut against the annular extension portion 25 is formed on the motor output shaft 1. When the waterproof ring 2 is assembled in place with the motor output shaft 1, the annular extension portion 25 just abuts against the annular step 11, thereby enabling the annular extension portion 25 to form an isolation effect between the small ring portion 21 and the motor end cover 4, preventing direct frictional contact between the small ring portion 21 and the motor end cover 4, and thus extending the service life of the waterproof ring 2.

[0043] In addition, in another alternative embodiment, a connecting portion 24 is further provided between the small ring portion 21 and the large ring portion 22; the outer diameter of the small ring portion 21 is larger than the outer circumferential dimension of the connecting portion 24. Here, the preferred connecting portion 24 is a circular ring structure, that is, the outer wall surface of the overall connecting portion 24 is a circumferential surface. In this way, through the cooperation of the large ring portion 22 and the small ring portion 21, a double waterproof barrier can be formed for the part where the motor output shaft 1 penetrates the motor end cover 4. Even when the waterproofing of the large ring portion 22 fails, the waterproofing effect can still be ensured under the action of the small ring portion 21. Specifically, when the motor stops running and the waterproof ring 2 also stops rotating with the motor, if water droplets pass through the large ring portion 22 at this time, they can only be isolated on the connecting portion by the small ring portion 21. The water droplets on the connecting portion 24 flow down along the outer circumferential surface of the connecting portion 24 under the action of gravity, thereby further ensuring the waterproofing effect of the motor output shaft end.

[0044] It should also be noted that the small ring portion 21, the connecting portion, and the large ring portion 22 in this embodiment are integrally formed by an elastic material. Based on this, it is convenient for the motor output shaft 1 to have an interference fit with the shaft hole 23. In the case of an interference fit, the waterproof ring 2 can follow the rotation of the motor output shaft 1 without slipping, fully ensuring the stability of the use state of the waterproof ring 2.

[0045] Finally, considering further improving the stability of the state where the waterproof ring 2 is sleeved on the motor output shaft 1, at least one convex positioning portion 71 is provided on the inner wall of the shaft hole 23 in this embodiment, and correspondingly, a positioning groove 72 adapted for the one-to-one insertion of the positioning portion 71 is formed on the outer side wall of the motor output shaft 1. Here, in combination with the accompanying drawings, an optional situation is exemplified. A positioning portion 71 is designed on the inner wall of the shaft hole 23, and this positioning portion 71 is designed at the axial end of the large ring portion 22 corresponding to the shaft hole 23 facing away from the small ring portion 21. In this way, during the assembly process of the waterproof ring 2 and the motor output shaft 1, it can be visually seen whether the positioning portion 71 has been inserted into the positioning groove 72. Here, through the cooperation of the positioning portion 71 and the positioning groove 72, when the waterproof ring 2 is sleeved on the motor output shaft 1 and the waterproof ring 2 rotates synchronously with the motor output shaft 1, it will not run out along the axial direction of the motor output shaft 1 to cause its protection to fail.

[0046] In summary, for the waterproof structure at the motor output shaft end of this embodiment, through the cooperation of the large ring portion 22 and the small ring portion 21, a double waterproof barrier can be formed for the part where the motor output shaft 1 penetrates the motor end cover 4. Even if the waterproofing of the large ring portion 22 fails, the waterproof effect can still be ensured under the action of the small ring portion 21.

[0047] Embodiment 2:

[0048] Based on the waterproof structure at the motor output shaft end of Embodiment 1, this embodiment provides a motor, including: the waterproof structure at the motor output shaft end of Embodiment 1, and a motor end cover 4 adapted for the motor output shaft 1 to pass through; wherein a bearing installation chamber 8 is provided in the motor end cover 4; and a bearing 3 adapted to cooperate with the motor output shaft 1 is provided in the bearing installation chamber 8.

[0049] In the above specific embodiments, the purpose, technical solution, and beneficial effects of the present invention have been further described in detail. It should be understood that the above are only specific embodiments of the present invention and are not used to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

[0050] In the description of the present invention, it should be understood that the terms indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0051] In the present utility model, unless otherwise clearly defined and limited, terms such as "installed", "connected", "joined", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0052] In the present utility model, unless otherwise clearly defined and limited, that the first feature is above or below the second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, that the first feature is above, on top of and over the second feature includes that the first feature is directly above and obliquely above the second feature, or merely means that the horizontal height of the first feature is higher than that of the second feature. That the first feature is below, under and beneath the second feature includes that the first feature is directly below and obliquely below the second feature, or merely means that the horizontal height of the first feature is less than that of the second feature.

Claims

1. A waterproof structure for a motor shaft end, characterized in that: include: A waterproof ring used for sleeve installation on the output shaft of the motor; The waterproof ring at least comprises a small annular portion and a large annular portion coaxially connected; wherein the outer diameter of the large annular portion is larger than the outer diameter of the small annular portion; and a coaxial through-hole suitable for the motor output shaft to pass through is formed in the small annular portion and the large annular portion; The end surface of the small annular portion facing away from the large annular portion faces the bearing on the output shaft of the motor; and At least three convex wings are spaced and evenly distributed around the axial hole on the end surface of the large annular portion facing away from the small annular portion.

2. The waterproof structure of the motor shaft end according to claim 1, characterized in that: The motor output shaft is interference fit with the shaft hole.

3. The waterproof structure of the motor shaft end according to claim 1, characterized in that: Each of the protruding wings has a rectangular structure; and The length direction of the convex wing extends along the radial direction of the large annular portion.

4. The waterproof structure of the motor shaft end according to claim 1, characterized in that: The at least three convex wings on the large annular portion are distributed in a spiral shape around the axial hole.

5. The waterproof structure of the motor shaft end according to claim 1, characterized in that: The end surface of the small circular portion facing away from the large circular portion is provided with a raised annular extension portion; The outer diameter of the annular extension portion is smaller than the outer diameter of the small circular portion.

6. The waterproof structure of the motor shaft end according to claim 5, characterized in that: An annular step suitable for abutting against the annular extension portion is formed on the motor output shaft.

7. The waterproof structure of the motor shaft end according to any one of claims 1 to 6, characterized in that: A connecting portion is also provided between the small circular portion and the large circular portion; The outer diameter of the small annular portion is greater than the outer circumferential dimension of the connecting portion.

8. The waterproof structure of the motor shaft end according to claim 7, characterized in that: The small annular portion, the connecting portion and the large annular portion are integrally formed by using elastic material.

9. The waterproof structure of the motor shaft end according to claim 1, characterized in that: The inner wall of the shaft hole is also provided with at least one protruding positioning portion, and correspondingly, a positioning groove suitable for one-to-one insertion of the positioning portion is formed on the outer side wall of the motor output shaft.

10. A motor, characterized in that: include: The waterproof structure of the motor output shaft end as claimed in any one of claims 1 to 9, and the motor end cover suitable for the motor output shaft to pass through; in A bearing installation chamber is provided in the motor end cover; and A bearing matched with the output shaft of the motor is arranged in the bearing installation chamber.

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