Motor shaft extension sealing structure

Abstract

The utility model relates to the field of motor sealing, and discloses a motor shaft extension sealing structure which comprises a fixing frame and a fastening frame, the front face of the fixing frame is provided with a clamping groove, the inner wall of the clamping groove is in threaded connection with a threaded rod, a connecting block is fixedly connected to the bottom end of the threaded rod, and the outer surface of the threaded rod is connected with a limiting frame in an embedded mode. A sponge mat is arranged on the inner wall of the fixing frame, a rubber sleeve is arranged on the front face of the fixing frame, and the rubber sleeve is in lap joint with the front face of the sponge mat. Through the fixing frame, the fastening frame, the threaded rod, the limiting frame and the connecting block, the limiting frame clamps the motor shaft, the limiting frame and the motor shaft can be stably connected together, then the sealing effect of the motor shaft is guaranteed, all gaps at the connecting position of the fixing frame and the fastening frame are further sealed through a sponge pad and a rubber sleeve, and the sealing effect of the motor shaft is improved. And the sealing performance of the sealing structure is better.

Description

Technical Field

[0001] The utility model relates to the technical field of motor sealing, in particular to a motor shaft extension sealing structure. Background Art

[0002] A motor is an electromagnetic device that converts or transmits electrical energy based on the law of electromagnetic induction. It is widely used in daily life. In order not to affect the working state of internal components during use, the motor shaft end needs to be sealed. Therefore, the existing motor shaft sealing structure has been continuously innovated and developed. Therefore, it can be seen that the current motor shaft sealing structure basically meets people's needs, but there are still some problems.

[0003] For example, the patent document with the announcement number CN212033896U discloses a sealing structure for the extension end of the motor shaft, by setting "a front end cover and a labyrinth cover, the labyrinth cover is axially provided with a circular through hole for sleeve connection with the motor shaft, and one end of the labyrinth cover is provided with an annular labyrinth groove along the circular through hole; one end of the front end cover is axially provided with a circular fitting groove, and the bottom of the fitting groove is also provided with a circular through hole for the motor shaft to pass through, and the bottom of the fitting groove is fixed with a labyrinth ring coaxially arranged with the circular through hole, and the front end cover is evenly provided with a plurality of mounting holes around the fitting groove; the labyrinth cover is embedded in the fitting groove and has a clearance fit with the fitting groove, and the labyrinth groove and the labyrinth ring are also clearance fit. The utility model has the effect of sealing the motor while reducing the friction on the motor shaft."

[0004] However, when the above device is actually used, the labyrinth cover is fixed on the motor shaft by screwing the top screw into the threaded through hole of the labyrinth cover and pressing it against the motor shaft. Since the contact area between the top screw and the motor shaft is small, the top screw and the motor shaft are prone to slippage, which leads to friction and heat generation between the two. As a result, after a long period of operation, the internal components of the motor are damaged due to the influence of high temperature. In addition, the connection effect between the sealing structure and the motor shaft is not good at this time. The sealing structure will deviate under the action of external force, resulting in poor sealing effect of the motor shaft. Therefore, a motor shaft extension sealing structure is urgently needed to solve the above problems. Utility Model Content

[0005] The purpose of the present invention is to provide a motor shaft sealing structure to solve the problems raised in the above background technology, that is, during use, the top screw and the motor shaft easily slip, resulting in poor sealing effect and frictional heat between the two, which may cause damage to the motor.

[0006] To achieve the above object, the present invention provides the following technical solution: a motor shaft extension sealing structure, comprising a fixing frame and a fastening frame, wherein a clamping groove is provided on the front surface of the fixing frame, and a threaded rod is threadedly connected to the inner wall of the clamping groove;

[0007] A connecting block is fixedly connected to the bottom end of the threaded rod, the outer surface of the threaded rod is engaged with a limiting frame, the inner wall of the fixed frame is provided with a sponge pad, the front of the fixed frame is provided with a rubber sleeve, and the rubber sleeve is overlapped on the front of the sponge pad.

[0008] Preferably, a recess is provided on the back of the fastening frame, and a connection hole is provided on the front of the fastening frame.

[0009] Preferably, a notch is provided on the outer surface of the fastening frame, and the notch extends inwardly through the clearance groove.

[0010] Preferably, a connecting groove is provided on the front surface of the fastening frame, and the rubber sleeve is movably connected to the inner wall of the connecting groove.

[0011] Preferably, a bayonet is provided on the outer surface of the fixing frame, and the bayonet and the notch are of the same size.

[0012] Preferably, a guide frame is provided on one side of the fastening frame, and a groove is provided on the inner wall of the guide frame.

[0013] Preferably, the diameter of the fixing frame is smaller than the diameter of the fastening frame, and the fixing frame is embedded and connected to the inner wall of the fastening frame.

[0014] Preferably, the limiting frame is in a semicircular shape, and the radius of the limiting frame is smaller than the radius of the inner wall of the fixed frame.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. The motor shaft is sealed by cooperating with the fixing frame and the fastening frame. In this process, the threaded rod needs to be rotated to adjust the distance between the limit frame and the fixing frame. When the limit frame clamps the motor shaft, the outer wall of the motor shaft can be fully wrapped to ensure the connection effect between the limit frame and the motor shaft, thereby ensuring the sealing effect of the motor shaft, avoiding slipping between the two, causing friction and heat between the two, and causing damage to the internal components of the motor. The sponge pad is then used to fill the gap between the limit frame and the fixing frame and the rubber sleeve sealing card groove, so that the sealing structure has better sealing performance, avoiding foreign objects from entering the gap, causing the fixing frame to be stuck during the rotation of the motor, affecting the use of the motor.

[0017] 2. By connecting the notch and the bayonet, it is convenient for the staff to tighten the threaded rod, thereby facilitating the maintenance of the sealing effect of the limit frame, thereby ensuring the sealing effect of the sealing structure. When the fixed frame is damaged, the fixing frame can be removed by removing the fastening frame and then separating the limit frame and the motor shaft. The operation is simple, making it easy to replace it, thereby extending the service life of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional schematic diagram of the utility model;

[0019] Figure 2 This is a schematic diagram of the fastening frame structure of the utility model;

[0020] Figure 3 This is a schematic diagram of the rubber sleeve structure of the present utility model;

[0021] Figure 4 This is a schematic diagram of the fixed frame structure of the utility model;

[0022] Figure 5 This is a schematic diagram of the limit frame structure of the utility model.

[0023] In the figure: 1. Fixing frame; 2. Fastening frame; 3. Snap-in groove; 4. Threaded rod; 5. Connecting block; 6. Limiting frame; 7. Sponge pad; 8. Rubber sleeve; 9. Clearance groove; 10. Connecting hole; 11. Notch; 12. Connecting groove; 13. Bayonet; 14. Guide frame; 15. Groove. DETAILED DESCRIPTION

[0024] 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.

[0025] See also Figure 3 、 Figure 4 and Figure 5 , an embodiment provided by the utility model:

[0026] A motor shaft extension sealing structure includes a fixed frame 1 and a fastening frame 2. The front of the fixed frame 1 is provided with a snap-in groove 3. The inner wall of the snap-in groove 3 is threadedly connected to a threaded rod 4 and a connecting block 5. The connecting block 5 is fixedly connected to the bottom end of the threaded rod 4. The outer surface of the threaded rod 4 is engaged with a limit frame 6. The inner wall of the fixed frame 1 is provided with a sponge pad 7. The front of the fixed frame 1 is provided with a rubber sleeve 8, and the rubber sleeve 8 is overlapped with the front of the sponge pad 7. The limit frame 6 is semicircular, and the radius of the limit frame 6 is smaller than the radius of the inner wall of the fixed frame 1.

[0027] In the process of sealing the output shaft of the motor, the staff first puts the fixing frame 1 on the output shaft of the motor, and then drives the threaded rod 4 to rotate along the inside of the fixing frame 1 through a tool, and then the threaded rod 4 drives the connecting block 5 to rotate, so that it first contacts the inner wall of the limit frame 6, and then pushes the limit frame 6 to move inward, and the limit frame 6 is tightly attached to the output shaft of the motor. At this time, the fixing frame 1 is clamped and fixedly connected to the output shaft of the motor through the limit frame 6 and the threaded rod 4, and then the fastening frame 2 is put on the fixing frame 1. At this time, the fastening frame 2 is inserted into the card slot 3, and the fixing frame 1 is inserted into the makeshift slot 9, and then Then, the bolt is passed through the connecting hole 10 and threadedly connected to the motor housing to complete the installation of the sealing structure. When the motor is running, the output shaft of the motor drives the limit frame 6 to rotate, and then the limit frame 6 drives the fixed frame 1 to rotate relative to the fastening frame 2 through the threaded rod 4. The device achieves the effect of sealing the output shaft of the motor through the cooperation between the fixed frame 1 and the fastening frame 2, and the sponge pad 7 is used to fill the gap between the limit frame 6 and the fixed frame 1 to prevent foreign objects from being embedded therein and affecting the use of the motor. The sponge pad 7 itself is easy to deform, so it is not affected when the limit frame 6 is displaced.

[0028] Furthermore, a connecting groove 12 is provided on the front of the fastening frame 2, and the rubber sleeve 8 is movably connected to the inner wall of the connecting groove 12. A guide frame 14 is provided on one side of the fastening frame 2, and a groove 15 is provided on the inner wall of the guide frame 14.

[0029] There is a certain gap between the connecting groove 12 and the rubber sleeve 8 in the device. When the fixed frame 1 rotates, it will drive the rubber sleeve 8 to rotate inside the connecting groove 12 and the groove 15. The rubber sleeve 8 seals the clamping groove 3 to prevent dust and impurities from entering the clamping groove 3, causing the fixing frame 1 to be stuck during rotation, thereby affecting the use of the motor. The guide frame 14 seals the rubber sleeve 8, making the sealing effect of the rubber sleeve 8 better, and the guide frame 14 can also guide the water flow to prevent water seepage from the motor and causing damage.

[0030] See also Figure 1 、 Figure 2 and Figure 3 , an embodiment provided by the utility model:

[0031] A recess 9 is provided on the back of the fastening frame 2, and a connection hole 10 is provided on the front of the fastening frame 2. The diameter of the fixing frame 1 is smaller than that of the fastening frame 2, and the fixing frame 1 is engaged with the inner wall of the fastening frame 2.

[0032] When the fixing frame 1 is damaged and needs to be replaced, the staff removes the bolts in the connecting holes 10 and drives the fastening frame 2 to move outward. At the same time, the rubber sleeve 8 makes relative movement. The rubber sleeve 8 has the characteristic of flexibility, so it disengages from the connecting groove 12 and the groove 15, and passes through the gap between the fastening frame 2 and the clamping groove 3, so that the fastening frame 2 is completely separated from the fixing frame 1. Then the staff uses a tool to drive the threaded rod 4 to rotate and move it outward. Then the threaded rod 4 drives the limit frame 6 to move outward through the connecting block 5, so that it is separated from the output shaft of the motor, so that the fixing frame 1 can be quickly removed and replaced.

[0033] Furthermore, a notch 11 is formed on the outer surface of the fastening frame 2, and the notch 11 extends to the inner wall of the fastening frame 2 through the clearance groove 9. A bayonet 13 is formed on the outer surface of the fixing frame 1, and the bayonet 13 and the notch 11 have the same size.

[0034] The user removes the bolt from the connecting hole 10 and rotates the fastening frame 2 to move the notch 11 to the opening of the bayonet 13 so that the two are connected, making it convenient for the staff to use tools to tighten the threaded rod 4, thereby ensuring the fixed connection between the limit frame 6 and the output shaft of the motor.

[0035] Working principle: When sealing the output shaft of the motor, the staff first puts the fixed frame 1 on the output shaft of the motor, and then rotates the threaded rod 4 with a tool. After that, the connecting block 5 rotates with the threaded rod 4 in the limit frame 6 and moves inward, thereby pushing the limit frame 6 to approach and clamp the output shaft of the motor, and then puts the fastening frame 2 on the fixed frame 1. The device achieves the purpose of sealing the motor shaft through the cooperation between the fixed frame 1 and the fastening frame 2. In this process, the limit frame 6 is against the outer wall of the motor shaft, which can effectively connect the limit frame 6 and the motor shaft, thereby ensuring the sealing effect of the motor shaft. Then use the sponge pad 7 to fill the gap between the limit frame 6 and the fixed frame 1 and the rubber sleeve 8 to seal the opening at one end of the card slot 3, thereby ensuring the sealing performance of the sealing structure. In addition, the user can take out the bolts in the connecting hole 10 and then rotate the fastening frame 2 to connect the notch 11 with the bayonet 13, which is convenient for the staff to fasten the limit frame 6 through the threaded rod 4, thereby facilitating the maintenance of the sealing structure and ensuring the sealing effect of the sealing structure. When the fixed frame 1 is damaged, the fastening frame 2 is taken out to separate it from the fixed frame 1, and then the limit frame 6 is separated from the motor shaft and the fixed frame 1 is taken out. The operation is simple and the fixed frame 1 is easy to replace.

[0036] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A motor shaft seal structure, comprising a fixing frame (1) and a fastening frame (2), characterized in that: A clamping groove (3) is provided on the front surface of the fixing frame (1), and a threaded rod (4) is threadedly connected to the inner wall of the clamping groove (3); A connecting block (5) is fixedly connected to the bottom end of the threaded rod (4); the outer surface of the threaded rod (4) is engaged with a limiting frame (6); the inner wall of the fixed frame (1) is provided with a sponge pad (7); the front of the fixed frame (1) is provided with a rubber sleeve (8), and the rubber sleeve (8) is overlapped on the front of the sponge pad (7).

2. The motor shaft seal structure according to claim 1, characterized in that: A clearance groove (9) is provided on the back of the fastening frame (2), and a connection hole (10) is provided on the front of the fastening frame (2).

3. The motor shaft seal structure according to claim 1, characterized in that: A notch (11) is provided on the outer surface of the fastening frame (2), and the notch (11) extends inward through the clearance groove (9).

4. The motor shaft seal structure according to claim 1, characterized in that: A connecting groove (12) is provided on the front surface of the fastening frame (2), and the rubber sleeve (8) is movably connected to the inner wall of the connecting groove (12).

5. The motor shaft seal structure according to claim 1, characterized in that: The outer surface of the fixing frame (1) is provided with a bayonet (13), and the bayonet (13) and the notch (11) have the same opening size.

6. The motor shaft seal structure according to claim 1, characterized in that: A guide frame (14) is provided on one side of the fastening frame (2), and a groove (15) is provided on the inner wall of the guide frame (14).

7. The motor shaft seal structure according to claim 1, characterized in that: The diameter of the fixing frame (1) is smaller than the diameter of the fastening frame (2), and the fixing frame (1) is embedded and connected to the inner wall of the fastening frame (2).

8. The motor shaft seal structure according to claim 1, characterized in that: The limiting frame (6) is in the shape of a semicircular ring, and the radius of the limiting frame (6) is smaller than the radius of the inner wall of the fixed frame (1).

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