Motor shaft sealing structure

Abstract

The utility model discloses a motor shaft sealing structure, the utility model relates to the technical field of shaft sealing, and this motor shaft sealing structure, including the end cap mechanism of motor shell outside side, the annular groove is set up on the top end surface of end cap mechanism, the annular groove of end cap mechanism top end sets up is the clamping groove subassembly, the utility model discloses the cooperation of clamping groove subassembly and sealing cover and the double -sealed design of static seal ring and dynamic seal ring, greatly reduced the possibility that the outside dust, moisture and other impurities enter the inside of motor, and the taper -table type structure of sealing cover and clamping groove subassembly closely fit, reduced the risk of impurity invasion from structure, and static seal ring and dynamic seal ring respectively in different position carry out the sealing of rotating shaft, formed more effective protective barrier, and the clean environment of inside motor is guaranteed, and then the operating stability and service life of motor are promoted.

Description

Technical Field

[0001] This utility model relates to the field of shaft sealing technology, specifically to a motor shaft sealing structure. Background Technology

[0002] During operation, the seal between the motor shaft and the motor housing is crucial. Traditional motor shaft sealing structures often suffer from poor sealing performance, allowing external dust, moisture, and other impurities to enter the motor and affect its normal operation. An existing patent (CN210157005U) describes a motor shaft sealing structure that includes a sealing end cap, through which the motor shaft extends. A sealing rubber ring is interference-fitted onto the motor shaft, with its outer diameter gradually decreasing towards the motor body. The sealing rubber ring is tightly fitted against the sealing end cap. A fixing ring matching the outer diameter of the sealing rubber ring is fixedly installed inside the sealing end cap. Several sealing protrusions are evenly distributed on the inner ring surface of the sealing rubber ring, and a sealed annular cavity filled with inert gas is formed circumferentially within the sealing rubber ring. This invention provides a simple motor shaft sealing structure with good sealing performance, and is easy to manufacture.

[0003] Regarding the aforementioned technologies, the inventors believe that the following defects exist: although they can be sealed with inert gas during use, the sealing cover and motor end cover are mostly assembled with bolts. Dust can easily enter the bolt holes due to the vibration of the motor during operation, affecting the use of the shaft. Therefore, we propose a motor shaft sealing structure to solve the above-mentioned problems. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this utility model provides a motor shaft sealing structure, which solves the problem that existing sealing covers and motor end covers are mostly assembled with bolts, and the bolt holes during bolt assembly are easily contaminated by the vibration of the motor during operation, affecting the use of the shaft.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: a motor shaft sealing structure, including an end cover mechanism on the outside of the motor housing, wherein an annular groove is provided on the top surface of the end cover mechanism, and the annular groove provided on the top surface of the end cover mechanism is a slot assembly;

[0006] The card slot assembly has an internal sealing cover, which is a frustoconical structure that is thinner at the top and thicker at the bottom. The outer circumferential surface of the sealing cover has a limiting hole with a screw hole structure, and there are four limiting holes in total.

[0007] The four limiting holes are arranged in a ring array on the outer peripheral surface of the sealing cover, and the top of the sealing cover is fixedly connected to a sealing part with a ring structure.

[0008] A static sealing ring is fixedly connected to the inner wall of the sealing part. There are two static sealing rings, which are fixedly connected to the inner wall of the sealing part in a straight array. A rotating shaft is installed on the inner side of the sealing part and the static sealing ring. A longitudinally arranged guide groove is opened on the outer circumferential surface of the rotating shaft.

[0009] Preferably, a mounting plate is fixedly connected to the top surface of the end cap mechanism, and the mounting plate has an arc-shaped structure.

[0010] Preferably, the mounting plate has four locations, and the four mounting plates are fixedly connected to the top surface of the end cap mechanism in a circular array.

[0011] Preferably, the four mounting plates described herein all have connecting holes with screw holes inside.

[0012] Preferably, a fixing bolt is installed inside the connecting hole, and the fixing bolt is connected to the sealing cover.

[0013] Preferably, a through groove is provided at the center of the end cap mechanism, and a bearing component is embedded inside the through groove. An embedded block A that matches the guide groove is fixedly connected to the inner wall of the bearing component.

[0014] Preferably, an inner baffle with an annular structure is sleeved on the outer side of the rotating shaft, and a dynamic sealing ring that fits against the bottom surface of the end cover mechanism is fixedly connected to the top surface of the inner baffle. An embedded block B that matches the guide groove is fixedly connected to the inner wall of the inner baffle. Beneficial effects

[0015] This invention provides a motor shaft sealing structure. Compared with the prior art, it has the following advantages:

[0016] This motor shaft sealing structure, through the cooperation of the slot assembly and the sealing cover, as well as the dual sealing design of the static sealing ring and the dynamic sealing ring, greatly reduces the possibility of external dust, moisture and other impurities entering the motor. The truncated cone structure of the sealing cover fits tightly with the slot assembly, structurally reducing the risk of impurities intruding. The static sealing ring and the dynamic sealing ring seal the shaft at different positions, forming a more effective protective barrier, ensuring a clean environment inside the motor, thereby improving the motor's operational stability and service life.

[0017] This motor shaft sealing structure features four arc-shaped mounting plates arranged in a ring array to ensure uniform circumferential stress on the sealing structure. The connecting holes inside the mounting plates engage with fixing bolts to firmly secure the sealing cover to the end cover mechanism, effectively preventing loosening. Even when the motor vibrates during operation, this sealing structure remains stable, ensuring that the static and dynamic sealing rings maintain tight contact with the shaft, continuously providing excellent sealing performance and guaranteeing the reliability of the motor shaft seal. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the front view of the disassembled sealing structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the combined structure of the sealing structure of this utility model;

[0020] Figure 3 This is a top view of the sealing structure of this utility model;

[0021] Figure 4 This is a schematic diagram of the combined structure of the end cap mechanism and the slot assembly of the sealing structure of this utility model;

[0022] Figure 5 This is a front view schematic diagram of the sealing structure of this utility model;

[0023] Figure 6 This is a schematic diagram of the combined structure of the sealing cover and the limiting hole of the sealing structure of this utility model.

[0024] In the diagram: 1. End cap mechanism; 101. Slot assembly; 1011. Mounting plate; 1012. Connecting hole; 1013. Fixing bolt; 1014. Bearing component; 1015. Embedded block A; 2. Inner baffle; 201. Dynamic sealing ring; 2011. Embedded block B; 3. Sealing cover; 301. Limiting hole; 3011. Sealing part; 3012. Static sealing ring; 3013. Rotating shaft; 3014. Guide groove. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figure 1 - Figure 6 The present invention provides a technical solution: a motor shaft sealing structure, including an end cover mechanism 1 on the outside of the motor housing, an annular groove is provided on the top surface of the end cover mechanism 1, and the annular groove provided on the top surface of the end cover mechanism 1 is a slot assembly 101.

[0027] The card slot assembly 101 is inserted into the sealing cover 3. The sealing cover 3 has a frustum-shaped structure that is thinner at the top and thicker at the bottom. The outer peripheral surface of the sealing cover 3 is provided with a limiting hole 301 with a screw hole structure. There are four limiting holes 301 in total.

[0028] Four limiting holes 301 are arranged in a ring array on the outer peripheral surface of the sealing cover 3, and the top of the sealing cover 3 is fixedly connected to a sealing part 3011 with a ring structure.

[0029] A static sealing ring 3012 is fixedly connected to the inner wall of the sealing part 3011. There are two static sealing rings 3012, which are fixedly connected to the inner wall of the sealing part 3011 in a straight array. A rotating shaft 3013 is installed on the inner side of the sealing part 3011 and the static sealing ring 3012. A longitudinally arranged guide groove 3014 is opened on the outer circumferential surface of the rotating shaft 3013.

[0030] By setting the end cover mechanism 1 and its top slot assembly 101, the sealing cover 3 is inserted. The sealing cover 3 utilizes the limiting hole 301, sealing part 3011, static sealing ring 3012 and guide groove 3014 on the rotating shaft 3013 to achieve preliminary sealing protection for the motor shaft and build a basic sealing structure framework.

[0031] See Figure 1 - Figure 2 An mounting plate 1011 is fixedly connected to the top surface of the end cap mechanism 1. The mounting plate 1011 has an arc-shaped structure.

[0032] The arc-shaped mounting plate 1011 is connected to the top of the end cover mechanism 1. The arc design can better fit the external structure of the motor, increase the overall adaptability and stability, and assist in the installation and fixation of the sealing structure.

[0033] See Figure 3 - Figure 5 There are four mounting plates 1011, which are fixedly connected to the top surface of the end cap mechanism 1 in a circular array.

[0034] By having four mounting plates 1011 arranged in a circular array at the top of the end cap mechanism 1, the sealing structure is subjected to more uniform force in the circumferential direction, which improves the stability of the sealing cover 3 after installation and enhances the overall sealing effect.

[0035] See Figure 1 - Figure 2 The four mounting plates 1011 are all provided with connecting holes 1012 with screw holes inside;

[0036] By opening a connection hole 1012 in the mounting plate 1011, an installation position is provided for the fixing bolt 1013, which facilitates the connection between the mounting plate 1011 and the sealing cover 3 and ensures the assembly integrity of the sealing structure.

[0037] See Figure 5 - Figure 6 A fixing bolt 1013 is installed inside the connecting hole 1012, and is connected to the sealing cover 3 through the fixing bolt 1013;

[0038] By installing a fixing bolt 1013 in the connecting hole 1012 and connecting it to the sealing cover 3, the sealing cover 3 is ensured to be firmly installed on the end cover mechanism 1, preventing the sealing cover 3 from loosening, maintaining the stability of the sealing structure, and thus ensuring the sealing performance.

[0039] See Figure 1 - Figure 2 The end cap mechanism 1 has a through groove at its center, and a bearing component 1014 is embedded inside the through groove. An embedded block A1015 that matches the guide groove 3014 is fixedly connected to the inner wall of the bearing component 1014.

[0040] By embedding the bearing component 1014 inside the end cover mechanism 1, the embedded block A1015 on its inner wall matches the guide groove 3014 of the rotating shaft 3013, which can assist the rotating shaft 3013 to rotate smoothly, while reducing the friction between the rotating shaft 3013 and the end cover mechanism 1, which is conducive to the long-term stable operation of the sealing structure.

[0041] See Figure 3 - Figure 5 An inner baffle 2 with an annular structure is sleeved on the outer side of the rotating shaft 3013. A dynamic sealing ring 201 that fits against the bottom surface of the end cover mechanism 1 is fixedly connected to the top surface of the inner baffle 2. An embedded block B2011 that matches the guide groove 3014 is fixedly connected to the inner wall of the inner baffle 2.

[0042] The inner baffle 2 is sleeved on the outside of the rotating shaft 3013. The dynamic sealing ring 201 on the inner baffle 2 fits against the bottom surface of the end cover mechanism 1. The embedded block B2011 on the inner wall matches the guide groove 3014, which further enhances the sealing effect and prevents dust and other impurities from entering from the gap between the rotating shaft 3013 and the end cover mechanism 1, thus ensuring the cleanliness of the motor's internal environment.

[0043] During operation, the components of the motor shaft sealing structure work together. First, the end cover mechanism 1 is installed on the outside of the motor housing. The annular groove at its top serves as a slot assembly 101 for inserting the sealing cover 3. The sealing cover 3 has a frustum-shaped structure that is thinner at the top and thicker at the bottom. This shape allows it to form a tight fit after being inserted into the slot assembly 101, thus enhancing the sealing effect.

[0044] The four limiting holes 301 on the outer peripheral surface of the sealing cover 3 are arranged in a ring array. By installing connectors in the limiting holes 301, the sealing cover 3 and the mounting plate 1011 can be further fixed to ensure that the sealing cover 3 will not be displaced during the operation of the motor.

[0045] The annular sealing part 3011 fixed at the top of the sealing cover 3 has two static sealing rings 3012 on its inner wall that are in close contact with the rotating shaft 3013. The static sealing rings 3012 have good elasticity and sealing performance. When the motor is running, they can effectively prevent external dust, water vapor and other impurities from entering the motor through the gap between the sealing part 3011 and the rotating shaft 3013.

[0046] The guide groove 3014 longitudinally arranged on the outer circumference of the rotating shaft 3013 matches the embedded block A1015 on the inner wall of the bearing component 1014 and the embedded block B2011 on the inner wall of the inner baffle 2. The through groove at the center of the end cover mechanism 1 is embedded in the bearing component 1014. When the motor shaft drives the rotating shaft 3013 to rotate, it ensures that the rotating shaft 3013 rotates smoothly and reduces the friction between the rotating shaft 3013 and the end cover mechanism 1.

[0047] The inner baffle 2 is sleeved on the outside of the rotating shaft 3013. The dynamic sealing ring 201 on its top surface is tightly fitted with the bottom surface inside the end cover mechanism 1. During the operation of the motor, the dynamic sealing ring 201 further prevents dust, water vapor and other impurities from entering the motor from the gap between the rotating shaft 3013 and the end cover mechanism 1. Together with the static sealing ring 3012, it forms a double sealing structure.

[0048] Four arc-shaped mounting plates 1011 are fixedly connected to the top surface of the end cover mechanism 1, arranged in a ring array. The connecting holes 1012 inside the mounting plates 1011 cooperate with the fixing bolts 1013. The fixing bolts 1013 pass through the connecting holes 1012 and connect to the sealing cover 3, firmly installing the sealing cover 3 on the end cover mechanism 1, enhancing the stability of the entire sealing structure and ensuring that each sealing component maintains a good sealing state during motor operation.

[0049] In summary, this device can achieve a tight seal by utilizing the sealing cover 3.

[0050] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

Claims

1. A motor shaft sealing structure, comprising an end cover mechanism (1) on the outer side of the motor housing, wherein an annular groove is provided on the top surface of the end cover mechanism (1), characterized in that: The annular groove at the top of the end cap mechanism (1) is a slot assembly (101). The card slot assembly (101) has a sealing cover (3) inserted inside. The sealing cover (3) is a frustum-shaped structure that is thinner at the top and thicker at the bottom. The outer circumferential surface of the sealing cover (3) is provided with a limiting hole (301) with a screw hole structure. There are four limiting holes (301). The four limiting holes (301) are arranged in a ring array on the outer peripheral surface of the sealing cover (3), and the top of the sealing cover (3) is fixedly connected to a sealing part (3011) with a ring structure. A static sealing ring (3012) is fixedly connected to the inner wall of the sealing part (3011). There are two static sealing rings (3012). The two static sealing rings (3012) are fixedly connected to the inner wall of the sealing part (3011) in a straight array. A rotating shaft (3013) is installed on the inner side of the sealing part (3011) and the static sealing ring (3012). A longitudinally arranged guide groove (3014) is opened on the outer circumferential surface of the rotating shaft (3013).

2. The motor shaft sealing structure according to claim 1, characterized in that: An mounting plate (1011) is fixedly connected to the top surface of the end cap mechanism (1), and the mounting plate (1011) has an arc-shaped structure.

3. The motor shaft sealing structure according to claim 2, characterized in that: The mounting plate (1011) has four locations, and the four mounting plates (1011) are fixedly connected to the top surface of the end cap mechanism (1) in a ring array.

4. The motor shaft sealing structure according to claim 3, characterized in that: The mounting plate (1011) described in all four locations has a connecting hole (1012) with a screw hole structure inside.

5. The motor shaft sealing structure according to claim 4, characterized in that: A fixing bolt (1013) is installed inside the connection hole (1012), and is connected to the sealing cover (3) through the fixing bolt (1013).

6. The motor shaft sealing structure according to claim 1, characterized in that: The end cap mechanism (1) has a through groove at its center, and a bearing component (1014) is embedded inside the through groove. An embedded block A (1015) matching the guide groove (3014) is fixedly connected to the inner wall of the bearing component (1014).

7. The motor shaft sealing structure according to claim 1, characterized in that: The outer side of the rotating shaft (3013) is fitted with an inner baffle (2) with an annular structure. A dynamic sealing ring (201) that fits against the bottom surface of the end cap mechanism (1) is fixedly connected to the top surface of the inner baffle (2). An embedded block B (2011) that matches the guide groove (3014) is fixedly connected to the inner wall of the inner baffle (2).

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