Sealing structure at shaft hole of motor shell

Abstract

The utility model discloses a sealing structure at a shaft hole of a motor shell, which comprises a shaft hole arranged on the surface of an end cover, an output shaft penetrating through the shaft hole and an installation outer ring installed at an outer port of the shaft hole, a built-in groove is arranged on one side of the installation outer ring close to the end cover, and a through groove is arranged in the built-in groove in a penetrating mode. A mounting inner ring is mounted in the built-in groove, and a rubber ring is arranged in the mounting inner ring; the mounting inner ring and the rubber ring are mounted in the mounting outer ring, and then the mounting outer ring is fixedly mounted at the outer port of the output shaft, so that the dustproof protection effect on the output shaft can be achieved, and the design has the advantages that a gap exists between the rubber ring and the output shaft, normal rotation of the output shaft cannot be interfered, and the service life of the output shaft is prolonged. And meanwhile, through multiple groups of rubber rings, external dust can be protected in multiple ways, so that the possibility that the dust enters the interior of the motor due to gaps is reduced, and a good dustproof effect is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of sealing, and in particular relates to a sealing structure at a shaft hole of a motor housing. Background Art

[0002] The motor casing is one of the essential accessories of the motor. A shaft hole is opened at the end cover of the motor casing so that the output shaft of the motor can extend from the shaft hole. In order for the output shaft to rotate normally, there will be a gap between the output shaft and the inner diameter of the shaft hole. They cannot be close together, otherwise it will interfere with the rotation of the output shaft. In order to prevent external dust from entering the motor through the gap, a sealing structure needs to be set at the shaft hole.

[0003] Existing sealing structures often use a metal ring or rubber ring that is placed between the output shaft and the shaft hole to achieve a sealing effect. However, this design still has problems. If the sealing ring fits the output shaft too tightly, it will interfere with the normal rotation of the output shaft and will also wear out over time. If the fit is loose, the sealing effect is poor and it cannot effectively block dust. Therefore, a new sealing structure needs to be designed to solve this problem. Utility Model Content

[0004] The purpose of the utility model is to provide a sealing structure at the shaft hole of a motor housing, so as to solve the problem of poor sealing effect of the existing sealing structure proposed in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a sealing structure at the shaft hole of a motor housing, comprising a shaft hole opened on the surface of an end cover, an output shaft passing through the shaft hole, and an outer mounting ring installed at the outer end of the shaft hole, wherein a built-in groove is opened on the side of the outer mounting ring close to the end cover, a through groove is opened inside the built-in groove, an inner mounting ring is installed inside the built-in groove, a rubber ring is provided inside the inner mounting ring, and a gap is left between the rubber ring and the outer surface of the output shaft.

[0006] Preferably, a spring is provided between the mounting inner ring and one side of the built-in groove, one end of the spring is fixed to the surface of the built-in groove, and the other end is in conflict with the mounting inner ring.

[0007] Preferably, the outer wall of the mounting inner ring matches the inner surface of the built-in groove, and the rubber ring is fixedly connected to the inner surface of the mounting inner ring.

[0008] Preferably, an installation component is provided between the installation outer ring and the end cover, and the installation component includes a docking ring and a docking groove. The docking ring is fixed to the side surface of the installation outer ring close to the end cover and is inserted into the docking groove opened on the surface of the end cover.

[0009] Preferably, the mounting assembly further comprises a threaded fastener and a threaded hole, wherein the threaded fastener is rotatably arranged inside the mounting outer ring and the docking ring, and the inner end is threadedly connected to the threaded hole provided inside the docking groove.

[0010] Preferably, the outer end of the threaded fastener extends out of the mounting outer ring and is fixedly connected to a rotary handle.

[0011] Preferably, a limiting assembly is provided between the built-in groove and the mounting inner ring, and the limiting assembly includes a limiting bar and a limiting groove. The limiting bar is symmetrically fixed on both sides of the mounting inner ring and is slidably plugged into the limiting groove opened on the inner wall of the built-in groove. One end of the limiting groove is closed and the other end is open.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] By installing the inner ring together with the rubber ring inside the outer ring, and then fixing the outer ring on the outer port of the output shaft, the output shaft can be protected from dust. The advantage of this design is that there is a gap between the rubber ring and the output shaft, which will not interfere with the normal rotation of the output shaft. At the same time, multiple sets of rubber rings can provide multiple protections against external dust, reducing the possibility of dust entering the motor due to gaps, thereby ensuring a good dust-proof effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a front cross-sectional view of the utility model;

[0015] Figure 2 This is a three-dimensional schematic diagram of installing the outer ring and the inner ring of the utility model;

[0016] Figure 3 For this utility model Figure 1 Enlarged schematic diagram of area A in the middle;

[0017] Figure 4 For this utility model Figure 1 Enlarged schematic diagram of area B in the middle;

[0018] In the figure: 100, end cover; 200, shaft hole; 300, output shaft; 400, mounting outer ring; 500, built-in groove; 600, through groove; 700, mounting inner ring; 800, rubber ring; 900, mounting assembly; 901, docking ring; 902, docking groove; 903, threaded fastener; 904, threaded hole; 1000, spring; 1100, limit assembly; 1101, limit strip; 1102, limit groove. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] Example

[0021] See also Figures 1 to 4 , is an embodiment of the present utility model, which provides a technical solution: a sealing structure at the shaft hole of a motor housing, comprising a shaft hole 200 opened on the surface of an end cover 100, an output shaft 300 passing through the shaft hole 200, and an installation outer ring 400 installed at the outer end of the shaft hole 200, wherein the installation outer ring 400 is provided with an internal groove 500 on the side close to the end cover 100, and a through groove 600 is opened inside the internal groove 500, and the output shaft 300 passes through the through groove 600, and an installation inner ring 700 is installed inside the internal groove 500, and a rubber ring 800 is provided inside the installation inner ring 700, and a plurality of rubber rings 800 are provided, and the output shaft 300 passes through the rubber ring 800, and a gap is left between the rubber ring 800 and the outer surface of the output shaft 300, so that when the output shaft 300 rotates, the rubber ring 800 will not cause obstruction to the output shaft 300, and at the same time, multiple groups of rubber rings 800 can also play a good dust-proof role.

[0022] In this embodiment, preferably, a spring 1000 is provided between the mounting inner ring 700 and one side of the built-in groove 500. One end of the spring 1000 is fixed to the surface of the built-in groove 500, and the other end is in conflict with the mounting inner ring 700. When the mounting outer ring 400 is removed, the spring 1000 can push out the mounting inner ring 700, thereby facilitating dust cleaning.

[0023] In this embodiment, preferably, the outer wall of the mounting inner ring 700 matches the inner surface of the built-in groove 500, and the rubber ring 800 is fixedly connected to the inner surface of the mounting inner ring 700 to ensure stable installation.

[0024] In this embodiment, preferably, an installation component 900 is provided between the installation outer ring 400 and the end cover 100, and the installation outer ring 400 can be fixedly installed on the surface of the end cover 100 through the installation component 900. The installation component 900 includes a docking ring 901 and a docking groove 902. The docking ring 901 is fixed to the side surface of the installation outer ring 400 close to the end cover 100 and is snapped into the inside of the docking groove 902 opened on the surface of the end cover 100 to complete the positioning connection between the installation outer ring 400 and the end cover 100. The installation component 900 also includes a threaded fastener 903 and a threaded hole 904. The threaded fastener 903 is rotatably set inside the installation outer ring 400 and the docking ring 901, and the inner end is threadedly connected to the threaded hole 904 opened inside the docking groove 902. By tightening the threaded fastener 903, the installation outer ring 400 can be fixed, and the threaded fastener 903 can be unscrewed to remove the installation outer ring 400.

[0025] In this embodiment, preferably, the outer end of the threaded fastener 903 extends out of the mounting outer ring 400 and is fixedly connected to a rotation handle to facilitate rotation of the threaded fastener 903 .

[0026] In this embodiment, preferably, a limiting component 1100 is provided between the built-in groove 500 and the installation inner ring 700 to play a limiting role. The limiting component 1100 includes a limiting bar 1101 and a limiting groove 1102. The limiting bar 1101 is symmetrically fixed on both sides of the installation inner ring 700, and is slidably plugged into the limiting groove 1102 opened on the inner wall of the built-in groove 500 to prevent the installation inner ring 700 from rotating inside the built-in groove 500. The limiting groove 1102 is closed at one end and open at the other end, and the installation inner ring 700 can be removed from the opening.

[0027] Although embodiments of the present invention have been shown and described (see the detailed description above for details), it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sealing structure for a shaft hole of a motor housing, comprising a shaft hole (200) provided on a surface of an end cover (100), an output shaft (300) passing through the shaft hole (200), and an outer mounting ring (400) mounted on an outer end of the shaft hole (200), characterized in that: A built-in groove (500) is provided on a side of the mounting outer ring (400) close to the end cover (100), a through groove (600) is provided inside the built-in groove (500), a mounting inner ring (700) is installed inside the built-in groove (500), a rubber ring (800) is provided inside the mounting inner ring (700), and a gap is left between the rubber ring (800) and the outer surface of the output shaft (300).

2. The sealing structure at the shaft hole of the motor housing according to claim 1, characterized in that: A spring (1000) is provided between the mounting inner ring (700) and one side of the built-in groove (500), one end of the spring (1000) is fixed to the surface of the built-in groove (500), and the other end is in conflict with the mounting inner ring (700).

3. The sealing structure at the shaft hole of the motor housing according to claim 1, characterized in that: The outer wall of the mounting inner ring (700) matches the inner surface of the built-in groove (500), and the rubber ring (800) is fixedly connected to the inner surface of the mounting inner ring (700).

4. The sealing structure at the shaft hole of the motor housing according to claim 1, characterized in that: A mounting assembly (900) is provided between the mounting outer ring (400) and the end cover (100), and the mounting assembly (900) comprises a docking ring (901) and a docking groove (902). The docking ring (901) is fixed to a side surface of the mounting outer ring (400) close to the end cover (100) and is inserted into the docking groove (902) provided on the surface of the end cover (100).

5. The sealing structure at the shaft hole of the motor housing according to claim 4, characterized in that: The mounting assembly (900) further comprises a threaded fastener (903) and a threaded hole (904); the threaded fastener (903) is rotatably arranged inside the mounting outer ring (400) and the docking ring (901), and the inner end is threadedly connected to the threaded hole (904) opened inside the docking groove (902).

6. The sealing structure at the shaft hole of the motor housing according to claim 5, characterized in that: The outer end of the threaded fastener (903) extends out of the mounting outer ring (400) and is fixedly connected to a rotary handle.

7. The sealing structure at the shaft hole of the motor housing according to claim 1, characterized in that: A limiting assembly (1100) is provided between the built-in groove (500) and the mounting inner ring (700), and the limiting assembly (1100) comprises a limiting bar (1101) and a limiting groove (1102), wherein the limiting bar (1101) is symmetrically fixed on both sides of the mounting inner ring (700) and is slidably plugged into the limiting groove (1102) provided on the inner wall of the built-in groove (500), and the limiting groove (1102) is closed at one end and open at the other end.

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