Waterproof main shaft

Abstract

The utility model belongs to the technical field of main shafts, and particularly relates to a waterproof main shaft which comprises a main shaft body, a first end cover and a second end cover, the main shaft body is sleeved with a shaft sleeve, a plurality of bearings are arranged between the main shaft body and the shaft sleeve, the first end cover is connected to one side of the shaft sleeve and provided with a plurality of water outlets, and the second end cover is connected to one side of the main shaft body. The second end cover is located between the first end cover and the shaft sleeve, a sealing piece is arranged between the second end cover and the first end cover, a water flow channel communicated with the water drainage opening is formed between the first end cover and the second end cover, and a waterproof structure is formed between the second end cover and the shaft sleeve; and a waterproof structure is formed between the second end cover and the shaft sleeve, so that the waterproof performance is further improved, water seepage at a gap caused by relative operation of the second end cover and the shaft sleeve is avoided, erosion damage to parts such as the bearing is avoided, and the service life is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of main shafts, and in particular relates to a waterproof main shaft. Background Art

[0002] The spindle is a shaft used to receive power and transmit it to other components. It is widely used in many fields. The existing waterproof measures for the spindle are generally to set sealing rings at both ends of the spindle bearings. However, after the spindle rotates and is used for a period of time, the seals wear out and water enters the bearings, causing damage to the spindle. Some use multi-level waterproofing, but it can only extend the leakage time and still cannot prevent water or other liquids from entering the bearings and causing bearing damage.

[0003] For example, Chinese patent application No. (CN202021150019.1) discloses a waterproof main shaft, which includes a main shaft, a sleeve, several groups of bearing devices, a main shaft end cover and a sleeve end cover, and a plurality of drainage grooves are opened on the sleeve end cover, so that after the waterproof seal is worn, water or other liquids can flow to the drainage groove through the third water flow channel between the main shaft end cover and the sleeve end cover, and then flow to the outside through the drainage groove; but its main shaft end cover is connected to the main shaft, so there is relative movement between the main shaft end cover and the sleeve, that is to say, there must be a gap between the main shaft end cover and the sleeve, and the gap is not waterproofed. When used in a relatively humid environment for a long time, water is easily infiltrated, thereby causing erosion or even damage to components such as bearings, affecting the service life, and needs to be improved. Utility Model Content

[0004] The purpose of the utility model is to provide a waterproof main shaft in view of the above-mentioned existing technical problems, so as to achieve the effect of further waterproofing the space between the main shaft end cover and the shaft sleeve.

[0005] In view of this, the utility model provides a waterproof main shaft, comprising:

[0006] The main shaft body is sleeved with a shaft sleeve, and a plurality of bearings are arranged between the main shaft body and the shaft sleeve;

[0007] A first end cover is connected to one side of the shaft sleeve and is provided with a plurality of drainage ports;

[0008] A second end cover is connected to one side of the main shaft body and is located between the first end cover and the shaft sleeve, and a sealing member is provided between the second end cover and the first end cover;

[0009] A water flow channel connected to the drain port is formed between the first end cover and the second end cover, and a waterproof structure is formed between the second end cover and the shaft sleeve.

[0010] In the above technical solution, further, the waterproof structure includes:

[0011] The water diversion part is located on the side of the bushing away from the axis center and is arranged corresponding to the drain opening;

[0012] The water blocking part is located between the second end cover and the bushing.

[0013] In the above technical solution, further:

[0014] The water diversion part includes a first annular protrusion axially connected to the side of the bushing close to the second end cover, and a second annular protrusion is formed on the side of the first annular protrusion away from the axis center;

[0015] Wherein, a water diversion groove is formed between the second annular protrusion and the axial surface of the bushing.

[0016] In the above technical solution, further:

[0017] The water blocking part includes a third annular protrusion axially connected to the side of the second end cover close to the bushing, and a first inclined surface is provided on the side of the third annular protrusion close to the axis center;

[0018] Wherein, a second inclined surface adapted to the first inclined surface is provided on the second annular protrusion, and a gap is formed between the second annular protrusion and the third protrusion.

[0019] In the above technical solution, further:

[0020] All the drain openings are opened downward.

[0021] In the above technical solution, further:

[0022] A plurality of circular holes are circumferentially provided on the first end cover, and the first end cover and the bushing are fixedly connected by bolts passing through the circular holes and nuts;

[0023] Wherein, the plurality of drain openings and the plurality of circular holes are circumferentially staggered on the radial surface of the first end cover.

[0024] The beneficial effects of the present utility model are:

[0025] 1. By forming a waterproof structure between the second end cover and the bushing, the waterproof performance is further improved, and water seepage at the gap existing due to their relative operation is avoided, erosion damage to components such as bearings is avoided, and the service life is prolonged.

[0026] 2. By arranging the second annular protrusion to form a water diversion groove, that is, after the seal is worn, a small amount of infiltrated water will be blocked by the second annular protrusion and is not easy to enter between the bushing and the main shaft body, and the water diversion groove can make the infiltrated water flow to the lower position in time and be discharged through the drain opening, avoiding water accumulation here and the occurrence of water seepage, avoiding erosion damage to components such as bearings, and prolonging the service life.

[0027] 3. Through the first inclined surface of the third annular protrusion on the second end cover and the second inclined surface on the second annular protrusion, an inclined gap is formed between the two, preventing water from entering the interior through the gap when flowing from the water guiding groove to the drain port, further avoiding water seepage, achieving a water blocking effect, preventing erosion and damage to components such as bearings, and extending the service life. Brief Description of the Drawings

[0028] Figure 1 is a schematic structural view of the present utility model;

[0029] Figure 2 is the present utility model Figure 1 is a cross-sectional view taken along line A-A in the present utility model;

[0030] Figure 3 is the present utility model Figure 2 is an enlarged view at position B in the present utility model;

[0031] Figure 4 is an exploded view of the present utility model;

[0032] The reference signs in the drawings are represented as: 1, main shaft body; 2, shaft sleeve; 3, bearing; 4, first end cover; 5, drain port; 6, second end cover; 7, seal; 8, water flow channel; 9, waterproof structure; 90, first annular protrusion; 91, second annular protrusion; 92, water guiding groove; 93, third annular protrusion; 94, first inclined surface; 95, second inclined surface; 96, gap; 10, round hole. Detailed Description of the Embodiment

[0033] Next, the technical solutions in the embodiments of the present application will be clearly described in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art belong to the scope protected by the present application.

[0034] Embodiment 1:

[0035] This embodiment provides a waterproof main shaft, including:

[0036] A main shaft body 1, sleeved with a shaft sleeve 2, and provided with a plurality of bearings 3 between the main shaft body 1 and the shaft sleeve 2;

[0037] A first end cover 4, connected to one side of the shaft sleeve 2, and provided with a plurality of drain ports 5;

[0038] A second end cover 6, connected to one side of the main shaft body 1, located between the first end cover 4 and the shaft sleeve 2, and provided with a seal 7 between the second end cover 6 and the first end cover 4;

[0039] Among them, a water flow channel 8 communicating with the drain port 5 is formed between the first end cover 4 and the second end cover 6, and a waterproof structure 9 is formed between the second end cover 6 and the bushing 2.

[0040] As can be seen from this embodiment, by forming a waterproof structure 9 between the second end cover 6 and the bushing 2, the waterproof performance is further improved, preventing water seepage at the gap 96 existing due to their relative movement, avoiding erosion and damage to components such as the bearing 3, and extending the service life.

[0041] Embodiment 2:

[0042] This embodiment provides a waterproof main shaft. In addition to including the technical solutions of the above embodiment, it also has the following technical features. The waterproof structure 9 includes:

[0043] A water diversion part, located on the side of the bushing 2 away from the axis center and corresponding to the drain port 5;

[0044] A water blocking part, located between the second end cover 6 and the bushing 2.

[0045] As can be seen from this embodiment, when a small amount of water seeps between the second end cover 6 and the bushing 2 in the case of wear of the seal 7, the water diversion part can divert it to the drain port 5, thereby preventing internal penetration, avoiding erosion and damage to components such as the bearing 3, and extending the service life;

[0046] The water blocking part can further prevent water from penetrating internally, making it difficult for water to enter the interior through the gap 96 existing due to relative movement between the second end cover 6 and the bushing 2, further avoiding erosion and damage to components such as the bearing 3, and extending the service life.

[0047] Embodiment 3:

[0048] This embodiment provides a waterproof main shaft. In addition to including the technical solutions of the above embodiment, it also has the following technical features:

[0049] The water diversion part includes a first annular protrusion 90 axially connected to the side of the bushing 2 close to the second end cover 6, and a second annular protrusion 91 is formed on the side of the first annular protrusion 90 away from the axis center;

[0050] Among them, a water diversion groove 92 is formed between the second annular protrusion 91 and the axial surface of the bushing 2;

[0051] At the same time, an integral structure is adopted between the first annular protrusion 90, the second annular protrusion 91, and the bushing 2.

[0052] It can be seen from this embodiment that by providing the first annular protrusion 90, the tortuosity effect of the water flow channel 8 is increased, the waterproof performance is enhanced, and a second annular protrusion 91 is formed on the side away from the axis. As a result, a water guide groove 92 is formed between the second annular protrusion 91 and the axial surface of the shaft sleeve 2. Thus, when a small amount of water seeps here, it can prevent the water from overflowing the gap 96 and entering the interior, and can flow downward in time to the drain port 5 for drainage, further improving the waterproof performance; moreover, the structure is simple and the manufacturing cost is low.

[0053] Embodiment 4:

[0054] This embodiment provides a waterproof main shaft. In addition to including the technical solutions of the above embodiments, it also has the following technical features:

[0055] The water blocking part includes a third annular protrusion 93 axially connected to the side of the second end cover 6 close to the shaft sleeve 2, and a first inclined surface 94 is provided on the side of the third annular protrusion 93 close to the axis;

[0056] Wherein, a second inclined surface 95 adapted to the first inclined surface 94 is provided on the second annular protrusion 91, and a gap 96 is formed between the second annular protrusion 91 and the third protrusion;

[0057] Meanwhile, an integral structure is adopted between the third annular protrusion 93 and the second end cover 6.

[0058] It can be seen from this embodiment that through the first inclined surface 94 of the third annular protrusion 93 on the second end cover 6 and the second inclined surface 95 on the second annular protrusion 91, an inclined gap 96 is formed between the two, so that when the water in the water guide groove 92 flows to the drain port 5, it can prevent the water from entering the interior through the gap 96, further avoiding the situation of water seepage, achieving the water blocking effect, and preventing erosion and damage to components such as the bearing 3, and prolonging the service life;

[0059] And the gap 96 between the second annular protrusion 91 and the third annular protrusion 93 is the gap 96 that inevitably exists between the second end cover 6 and the shaft sleeve 2 due to relative movement.

[0060] Embodiment 5:

[0061] This embodiment provides a waterproof main shaft. In addition to including the technical solutions of the above embodiments, it also has the following technical features:

[0062] A plurality of drain ports 5 are all opened downward;

[0063] Among them, three drain ports 5 can be adopted. One is opened vertically downward, and the other two are respectively arranged on both sides of the vertically downward opened drain port 5, and the included angle with it is 45°.

[0064] As can be seen from this embodiment, by opening the drain port 5 downward, it is avoided that the drain port 5 serves as an inlet port when it is opened upward. Since the first end cover 4 does not rotate, the drain port 5 can always face downward, thereby effectively improving the drainage effect, that is, ensuring the waterproof performance.

[0065] And by arranging a drain port 5 to be opened vertically downward, it can effectively prevent internal water accumulation, so that the infiltrated water can flow to a lower place and then be discharged from the drain port 5, ensuring the waterproof performance.

[0066] Embodiment 6:

[0067] This embodiment provides a waterproof main shaft. In addition to including the technical solutions of the above embodiments, it also has the following technical features:

[0068] A plurality of circular holes 10 are circumferentially opened on the first end cover 4, and it is connected and fixed with the shaft sleeve 2 by bolts passing through the circular holes 10 and nuts.

[0069] Among them, the plurality of drain ports 5 and the plurality of circular holes 10 are circumferentially staggered and opened on the radial surface of the first end cover 4.

[0070] As can be seen from this embodiment, by circumferentially staggering the opening of the drain port 5 and the circular holes 10 for installing bolts on the radial surface of the first end cover 4, it can avoid the water discharged from the drain port 5 from contacting the bolts for fixing, prevent corrosion of the bolts, extend the service life of the bolts, and avoid difficulties in subsequent disassembly.

[0071] The embodiments of the present application have been described above in conjunction with the accompanying drawings. Without conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present application, those of ordinary skill in the art can also make many forms without departing from the purpose of the present application and the scope protected by the claims, and all belong to the protection scope of the present application.

Claims

1. A waterproof spindle, characterized in that: include: A main shaft body (1) is sleeved with a shaft sleeve (2), and a plurality of bearings (3) are arranged between the main shaft body and the shaft sleeve (2); A first end cover (4) is connected to one side of the shaft sleeve (2) and is provided with a plurality of drainage ports (5); A second end cover (6) is connected to one side of the main shaft body (1) and is located between the first end cover (4) and the shaft sleeve (2), and a sealing member (7) is provided between the second end cover (6) and the first end cover (4); A water flow channel (8) communicating with the drain port (5) is formed between the first end cover (4) and the second end cover (6), and a waterproof structure (9) is formed between the second end cover (6) and the shaft sleeve (2).

2. The waterproof main shaft according to claim 1, characterized in that: The waterproof structure (9) comprises: The water diversion part is located on a side of the shaft sleeve (2) away from the axis and is arranged corresponding to the water discharge port (5); The water blocking portion is located between the second end cover (6) and the shaft sleeve (2).

3. The waterproof main shaft according to claim 2, characterized in that: The water guide portion comprises a first annular protrusion (90) connected to the shaft sleeve (2) on a side close to the second end cover (6) along the axial direction, and a second annular protrusion (91) is formed on a side of the first annular protrusion (90) away from the axis; Wherein, the second annular protrusion (91) and the axial surface of the shaft sleeve (2) form a water guide groove (92).

4. The waterproof main shaft according to claim 3, characterized in that: The water blocking portion comprises a third annular protrusion (93) axially connected to the second end cover (6) on the side close to the shaft sleeve (2), and a first inclined surface (94) is provided on a side close to the axis of the third annular protrusion (93); The second annular protrusion (91) is provided with a second inclined surface (95) adapted to the first inclined surface (94), and a gap (96) is formed between the second annular protrusion (91) and the third protrusion.

5. The waterproof main shaft according to claim 1, characterized in that: The plurality of drainage openings (5) are all opened downwards.

6. The waterproof main shaft according to claim 5, characterized in that: The first end cover (4) is provided with a plurality of circular holes (10) on its circumference, and is connected and fixed to the shaft sleeve (2) by bolts passing through the circular holes (10) and nuts; The plurality of drainage openings (5) and the plurality of circular holes (10) are arranged in an alternating manner along the circumference of the radial surface of the first end cover (4).

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