A motor shaft that ensures a seal

Abstract

This utility model discloses a motor shaft that ensures a seal, comprising a motor shaft body with a sealing plate movably connected to its upper outer side; a sealing ring plate fixedly disposed on the upper outer side of the sealing plate, and a limiting structure movably connected to the outer side of the sealing plate; and a blocking plate fixedly installed on the inner middle side of the sealing plate, with a sealing structure movably connected to its lower side. The limiting structure includes a moving rod installed on the lower outer side of the sealing plate, an mounting rod movably connected to the upper outer side of the sealing plate, and a moving block that acts as a pusher connected to the outer side of the mounting rod. A connecting block that acts as a limiter is fixedly installed on the upper side of the moving block. This motor shaft, with its sealing structure, prevents dust and other impurities from entering the motor through the gap between the motor shaft and the motor housing, thus achieving a sealing effect on the motor shaft. The limiting structure also serves to install the sealing sleeve.

Description

Technical Field

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

[0002] The motor shaft refers to the output shaft of a motor, and is also the rotating shaft connecting the motor and the reducer (if any) in a motor or generator. It plays a crucial role in the motor by supporting rotating components, transmitting torque, and determining the relative position of the rotating components with respect to the stator. The motor shaft's design, manufacturing, and material selection directly affect the motor's performance. To ensure stable operation, the motor shaft must possess sufficient strength and rigidity. For example:

[0003] Chinese Patent Publication No. CN221202274U discloses a motor shaft seal for mating with a motor shaft. It includes a main sealing body, a skeleton, and a sealing lip. The main sealing body is fitted onto the outside of the motor shaft. The inner circumference of the main sealing body has a dust-proof lip for clearance fitting with the motor shaft. The skeleton is embedded in the main sealing body to provide support. The sealing lip is made of polytetrafluoroethylene (PTFE). The sealing lip includes a radial extension and an axial extension. The outer circumference of the radial extension is connected to the main sealing body, and the axial extension is connected to the inner circumference of the radial extension and is used for an interference-fit seal with the motor shaft. The axial extension extends towards the side where the dust-proof lip is located. This invention can form a good seal with the motor shaft, has stronger wear resistance, reduces wear, and thus extends service life.

[0004] Based on existing solutions and actual production and processing, the current motor shaft still has some problems, such as:

[0005] 1. When installing the main seal, it is installed by sleeve on the outside of the motor shaft. During the operation and rotation of the motor shaft, vibration will be generated, which may cause the motor shaft to fall off from the main seal.

[0006] 2. When sealing the motor shaft, the sealing effect is limited if either the dust-proof lip or the axial extension is damaged. Therefore, this invention provides a motor shaft that ensures a seal to solve the above-mentioned problems. Utility Model Content

[0007] The purpose of this invention is to provide a motor shaft that ensures sealing, in order to solve the problems mentioned in the background art, where the main sealing body is sleeved on the outside of the motor shaft, and the main sealing body may fall off due to vibration during operation. Furthermore, the sealing of the motor shaft using the dust-proof lip and the axial extension is inadequate if any one of them is damaged.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a motor shaft that ensures sealing, comprising a motor shaft body, wherein a sealing plate is movably connected to the outer side of its upper end;

[0009] Also includes:

[0010] A sealing ring plate is fixedly installed on the outer side of the upper end of the sealing plate, and a moving rod is movably connected to the outer side of the lower end of the sealing plate. A limit structure is installed on the upper side of the outer end of the sealing plate through a mounting rod.

[0011] A baffle plate is fixedly installed inside the sealing plate, and a first sealing ring is movably connected to the lower side of the baffle plate. A sealing sleeve is fixedly connected to the inner side of the first sealing ring, and a connecting sealing ring is installed inside the sealing sleeve by adhesive. The sealing sleeve is connected to the sealing plate through a sealing structure.

[0012] Preferably, the limiting structure includes a movable block installed on the outside of the mounting rod and playing a pushing role, and a connecting block that plays a limiting role is fixedly installed on the upper side of the movable block, and a limiting block is fixedly installed on the inner side of the movable block.

[0013] Preferably, a fixing rod is also connected to the upper inner side of the sealing plate.

[0014] Preferably, the mounting rod and the sealing plate are rotatably connected, and the outer vertical cross-section of the mounting rod is a cross-shaped structure.

[0015] Preferably, the fixing rod and the sealing plate are connected by a thread, and the fixing rod is symmetrically distributed about the center line of the sealing plate.

[0016] Preferably, the sealing structure includes a second sealing ring fixedly installed on the outer side of the upper end of the sealing sleeve, and a third sealing ring fixedly connected to the middle side of the upper end of the sealing sleeve.

[0017] Preferably, the third sealing ring and the sealing plate are interlocked, and the sealing plate and the second sealing ring are fitted together and provide a sealing effect between the sealing plate and the sealing sleeve.

[0018] Preferably, the movable rod and the sealing plate are connected by threads, and the movable rod and the sealing sleeve are fitted together.

[0019] Compared with the prior art, the beneficial effects of this utility model are: the sealing structure of the motor shaft ensures a seal, which can prevent dust and other impurities from entering the motor through the gap between the motor shaft and the motor housing, thereby playing a sealing role for the motor shaft; and the limiting structure can play a role in installing the sealing sleeve.

[0020] 1. By installing the sealing plate on the outside of the motor shaft body, the sealing plate drives the sealing ring plate to be installed on the lower side of the motor housing. By rotating the fixing rod, the fixing rod is threaded on the upper side of the inside of the sealing plate, thereby making the fixing rod threaded on the lower side of the motor housing. This causes the fixing rod to drive the sealing plate to move upward, so that the sealing plate and the motor housing compress the sealing ring plate, which facilitates the installation of the sealing plate and thus facilitates the sealing between the sealing plate and the motor housing.

[0021] 2. By placing the sealing sleeve on the outside of the sealing plate and dragging the sealing sleeve upward, the sealing sleeve drives the third sealing ring to engage and install on the upper inside of the sealing plate. This causes the sealing sleeve to drive the second sealing ring to adhere to the upper inside of the sealing plate, which in turn causes the sealing sleeve to drive the connecting sealing ring to adhere to the outside of the motor shaft body. The sealing sleeve then drives the first sealing ring to move upward, thereby allowing the first sealing ring to adhere to the lower side of the baffle plate. This facilitates sealing between the motor shaft body and the sealing plate, ensuring the sealing effect of the motor shaft body.

[0022] 3. By rotating the mounting rod, the mounting rod rotates on the upper inside of the sealing plate, causing the moving block, which is threadedly connected to the mounting rod, to move inward. This causes the moving block to slide inward on the upper inside of the sealing plate, and then the moving block drives the limiting block to slide inward to the outer side of the sealing sleeve for engagement. Rotating the moving rod causes it to be threadedly connected to the lower outer side of the sealing plate, causing the moving rod to move inward from the lower outer side of the sealing plate. This allows the moving rod to abut against the outer side of the sealing sleeve, facilitating the installation of the sealing sleeve. Attached Figure Description

[0023] Figure 1 This is a schematic cross-sectional view of the connection between the motor shaft body and the sealing plate of this utility model.

[0024] Figure 2 This utility model Figure 1 Enlarged structural diagram at point A in the middle;

[0025] Figure 3 This utility model Figure 1 Enlarged structural diagram at point B;

[0026] Figure 4 This is a schematic cross-sectional view of the connection between the sealing plate and the sealing ring plate of this utility model.

[0027] Figure 5 This utility model Figure 4 Enlarged structural diagram at point C;

[0028] Figure 6 This is an exploded structural diagram of the connection between the sealing plate and the sealing ring plate of this utility model.

[0029] In the diagram: 1. Motor shaft body; 2. Sealing plate; 3. Sealing sleeve; 4. Mounting rod; 5. First sealing ring; 6. Sealing ring plate; 7. Fixing rod; 8. Moving block; 9. Connecting block; 10. Limiting block; 11. Second sealing ring; 12. Blocking plate; 13. Connecting sealing ring; 14. Third sealing ring; 15. Moving rod. Detailed Implementation

[0030] 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.

[0031] Please see Figure 1-6 This utility model provides a technical solution: a motor shaft that ensures sealing, comprising a motor shaft body 1, a sealing plate 2, a sealing sleeve 3, a mounting rod 4, a first sealing ring 5, a sealing ring plate 6, a fixing rod 7, a moving block 8, a connecting block 9, a limiting block 10, a second sealing ring 11, a blocking plate 12, a connecting sealing ring 13, a third sealing ring 14, and a moving rod 15. In operation, the specific details are as follows... Figure 1 , Figure 4 and Figure 5As shown, a fixing rod 7 is movably installed on the upper side inside the sealing plate 2, and a sealing ring plate 6 is fixedly installed on the outer side of the upper end of the sealing plate 2. The sealing plate 2 is manually placed on the outer side of the motor shaft body 1, so that the sealing plate 2 is engaged on the outer side of the motor shaft body 1. Pushing the sealing plate 2 causes it to slide on the outer side of the motor shaft body 1. As a result, the sealing plate 2 moves the sealing ring plate 6 to contact the motor housing. The fixing rod 7 is placed inside the sealing plate 2, and then the fixing rod 7 is screwed. As a result, the fixing rod 7 is threaded on the upper side inside the sealing plate 2. As a result, the fixing rod 7 moves upward under the thread action between the fixing rod 7 and the sealing plate 2. As a result, the fixing rod 7 is threaded on the outer side of the motor housing. The fixing rod 7 moves the sealing plate 2 upward, so that the sealing plate 2 and the motor housing compress the sealing ring plate 6, which facilitates the installation of the sealing plate 2 and seals the space between the sealing plate 2 and the motor housing.

[0032] Specific examples Figure 1 , Figure 2 Figure 4 , Figure 5 and Figure 6As shown, the sealing plate 2 is movably connected to the upper outer side of the mounting rod 4, the outer side of the mounting rod 4 is movably connected to the movable block 8, the inner side of the movable block 8 is fixedly installed with a limiting block 10, and the upper end of the movable block 8 is fixedly installed with a connecting block 9. The sealing sleeve 3 is installed on the outer side of the motor shaft body 1, so that when the sealing sleeve 3 is pushed upward, the sealing sleeve 3 moves upward on the outer side of the motor shaft body 1. Under the action of the movement of the sealing sleeve 3, the sealing sleeve 3 drives the second sealing ring 11 to be installed in the inner middle side of the sealing plate 2. The mounting rod 4 installed on the upper outer side of the sealing plate 2 is manually rotated, so that the mounting rod 4 rotates on the upper outer side of the sealing plate 2. Under the action of the rotation of the mounting rod 4, the movable block 8 is threadedly connected on the outer side of the mounting rod 4. Then, under the action of the thread between the movable block 8 and the mounting rod 4, the movable block 8 is inside the sealing plate 2. The moving block 8 moves inward, causing the connecting block 9 to slide inward on the upper side of the sealing plate 2. This inward movement causes the limiting block 10 to slide inward, and the limiting block 10 engages with the upper outer side of the sealing sleeve 3, thus limiting the sealing sleeve 3. Then, the moving rod 15 is manually rotated, causing it to be threaded on the lower outer side of the sealing plate 2. This threaded action between the moving rod 15 and the sealing plate 2 causes the moving rod 15 to move inward, making it contact the lower outer side of the sealing sleeve 3. This action allows the moving rod 15 to abut against the sealing sleeve 3, facilitating the limiting of the sealing sleeve 3.

[0033] Specific examples Figure 1 , Figure 2 and Figure 3As shown, the second sealing ring 11 is fixedly installed on the outer side of the upper end of the sealing sleeve 3, the third sealing ring 14 is fixedly connected to the middle side of the upper end of the sealing sleeve 3, and the first sealing ring 5 is fixedly installed on the outer side of the middle part of the sealing sleeve 3. When the sealing sleeve 3 is installed on the outer side of the motor shaft body 1 and pushed upward, the sealing sleeve 3 moves and causes the third sealing ring 14 to engage with the upper side of the inner side of the sealing plate 2. Thus, the sealing sleeve 3 moves and causes the second sealing ring 11 to adhere to the upper side of the inner side of the sealing plate 2. This allows the third sealing ring 14 and the second sealing ring 11 to engage with the sealing plate 2 and the sealing sleeve. The sealing sleeve 3 moves, causing the first sealing ring 5 to move into the interior of the sealing plate 2. The first sealing ring 5 then adheres to the lower end of the baffle plate 12, thus sealing the space between the sealing sleeve 3 and the sealing plate 2. The connecting sealing ring 13, which is connected to the sealing sleeve 3 by adhesive inside the sealing sleeve 3, is also in close contact with the motor shaft body 1. This ensures that the sealing sleeve 3 and the motor shaft body 1 are sealed during the rotation of the motor shaft body 1, thus guaranteeing the sealing effect of the motor shaft body 1.

[0034] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0035] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A motor shaft that ensures sealing, comprising a motor shaft body (1) with a sealing plate (2) movably connected to the outer side of its upper end; Its features are, Also includes: A sealing ring plate (6) is fixedly installed on the outer side of the upper end of the sealing plate (2), and a moving rod (15) is movably connected to the outer side of the lower end of the sealing plate (2). A limit structure is installed on the upper side of the outer end of the sealing plate (2) through the mounting rod (4). A baffle plate (12) is fixedly installed inside the middle side of the sealing plate (2), and a first sealing ring (5) is movably connected to the lower side of the baffle plate (12). A sealing sleeve (3) is fixedly connected to the inner side of the first sealing ring (5), and a connecting sealing ring (13) is installed inside the middle side of the sealing sleeve (3) by adhesive. The sealing sleeve (3) is connected to the sealing plate (2) through the provided sealing structure.

2. The motor shaft for ensuring sealing according to claim 1, characterized in that: The limiting structure includes a movable block (8) installed on the outside of the mounting rod (4) and which plays a pushing role. A connecting block (9) that plays a limiting role is fixedly installed on the upper side of the movable block (8), and a limiting block (10) is fixedly installed on the inner side of the movable block (8).

3. A motor shaft for ensuring sealing according to claim 1, characterized in that: A fixing rod (7) is also connected to the upper inner side of the sealing plate (2).

4. A motor shaft for ensuring sealing according to claim 2, characterized in that: The mounting rod (4) and the sealing plate (2) are rotatably connected, and the outer vertical cross-section of the mounting rod (4) is a cross-shaped structure.

5. A motor shaft for ensuring sealing according to claim 3, characterized in that: The fixing rod (7) and the sealing plate (2) are connected by a thread, and the fixing rod (7) is symmetrically distributed about the center line of the sealing plate (2).

6. A motor shaft for ensuring sealing according to claim 1, characterized in that: The sealing structure includes a second sealing ring (11) fixedly installed on the outer side of the upper end of the sealing sleeve (3), and a third sealing ring (14) fixedly connected to the middle side of the upper end of the sealing sleeve (3).

7. A motor shaft for ensuring sealing according to claim 6, characterized in that: The third sealing ring (14) is engaged with the sealing plate (2), and the sealing plate (2) is fitted with the second sealing ring (11) and provides a sealing effect between the sealing plate (2) and the sealing sleeve (3).

8. A motor shaft for ensuring sealing according to claim 1, characterized in that: The moving rod (15) is connected to the sealing plate (2) by a thread, and the moving rod (15) is fitted to the sealing sleeve (3).

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