Motor bearing protection device
By installing a carbon brush structure at the motor bearing for grounding, the problem of bearing damage caused by shaft current was solved, and the safe and stable operation of the motor was achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- XINXING DUCTILE IRON PIPES CO LTD
- Filing Date
- 2025-03-31
- Publication Date
- 2026-05-19
AI Technical Summary
During motor operation, shaft current flows through the bearing balls and raceways to the motor housing and ground, causing electrolytic pits on the bearing raceway surface, increasing frictional resistance and temperature, which may damage the bearing and affect the safe operation of the motor.
The bearing uses an end cap connector and a scissor-type mounting bracket to install a carbon brush structure for grounding. The shaft current is eliminated by adjusting the adjustment component, thus extending the bearing life.
It effectively eliminates shaft current, prevents bearing damage, extends service life, and ensures safe operation of the motor.
Smart Images
Figure CN224264749U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of communication equipment protection technology, specifically to a motor bearing protection device. Background Technology
[0002] During motor operation, if there is shaft current at the two bearing ends or between the motor shaft and the bearing, the generated shaft current will pass through the motor shaft and the bearing balls and raceways to the motor housing and ground to release the current. After long-term operation, it will cause tiny electro-erosion pits to form on the surface of the bearing balls and raceways, which will reduce the surface quality of the bearing raceways, increase frictional resistance, and cause the bearing temperature to rise, increasing operating noise. In severe cases, it will lead to bearing damage and cause motor operation accidents.
[0003] To prevent shaft current from damaging equipment, a motor bearing protection device is proposed to solve this problem. Utility Model Content
[0004] In view of this, the present invention provides a motor bearing protection device. The present invention can fix the end cover connecting seat on the motor end cover, and the scissor mounting bracket installed on it can be adjusted by the adjusting component so that the carbon brush structure can ground the current passing through the motor shaft, thereby eliminating the shaft current, avoiding bearing damage, extending the service life of the motor bearing, and ensuring the safe operation of the motor unit.
[0005] To solve the above-mentioned technical problems, this utility model provides a motor bearing protection device, including an end cover connecting seat and a scissor-type mounting bracket installed on the end cover connecting seat. A carbon brush structure is installed at the end of the scissor-type mounting bracket, wherein an adjusting element is provided between the scissor-type mounting bracket and the end cover connecting seat, and the carbon brush structure is grounded.
[0006] The end cap connector includes an arc-shaped plate with through holes at both ends and connecting ear structures on the outer arc surfaces at both ends. In addition, a protrusion is provided on one side of the base surface of the arc-shaped plate, and a scissor mounting bracket is installed on the protrusion.
[0007] The scissor mounting bracket includes a support pin structure fixed to the side base of the protrusion block. The support pin structure is provided with a first bracket and a second bracket. The first bracket and the second bracket are rotatably mounted with the support pin structure as the rotation center. Both of them are provided with carbon brush sleeves at their lower ends. The carbon brush structure is installed in the carbon brush sleeves. In addition, the upper ends of the first bracket and the second bracket are provided with connecting protrusions.
[0008] The carbon brush structure includes a carbon brush body mounted on a carbon brush sleeve. The corresponding carbon brush sleeve should be provided with fasteners for fixing the carbon brush body. In addition, a terminal block is fixedly installed between the carbon brush body and the carbon brush sleeve, and a grounding wire is connected to the terminal block.
[0009] The adjusting component is a tension spring, with a connecting protrusion and a connecting ear structure at its two ends, respectively.
[0010] In summary, compared with the prior art, this application includes at least one of the following beneficial technical effects:
[0011] 1. The end cover connector is used to connect the motor end cover. The scissor-type mounting bracket installed on it can be adjusted by the adjusting component so that the carbon brush structure can ground the current passing through the motor shaft, thereby eliminating the shaft current, avoiding bearing damage, extending the service life of the motor bearing, and ensuring the safe operation of the motor set.
[0012] 2. The tension of the tension spring applies tension to the upper ends of the first and second brackets, causing them to be pressed against the surface of the motor shaft. Meanwhile, the tension of the tension spring, combined with the curvature of the arc plate and the motor end cover, ensures stability during use. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the structure of the motor bearing protection device of this utility model;
[0014] Figure 2 This is an enlarged schematic diagram of structure A of this utility model;
[0015] Figure 3 This is an enlarged schematic diagram of structure B of this utility model.
[0016] Explanation of reference numerals in the attached figures:
[0017] 1. End cap connector; 11. Arc plate; 111. Through hole; 12. Connecting ear structure; 13. Protrusion block; 2. Scissor mounting bracket; 21. Support pin structure; 22. First bracket; 23. Second bracket; 24. Carbon brush sleeve; 25. Connecting protrusion; 26. Fastener; 3. Carbon brush structure; 31. Carbon brush body; 32. Terminal block; 33. Grounding wire; 4. Adjustment component. Detailed Implementation
[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the following will be described in conjunction with the accompanying drawings of the embodiments of this utility model. Figure 1-3 The technical solutions of the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model are within the protection scope of this utility model.
[0019] This utility model is as follows Figure 1-3As shown: It includes an end cover connecting seat 1, which corresponds to the fastening bolts of the motor end cover through the through holes 111 at both ends of the arc plate 11, so that the fastening bolts of the motor end cover fix the arc plate 11 and the motor end cover. A scissor mounting bracket 2 is installed on the end cover connecting seat 1. A carbon brush structure 3 is installed at the end of the scissor mounting bracket 2. An adjustment component 4 is provided between the scissor mounting bracket 2 and the end cover connecting seat 1. The carbon brush structure 3 is grounded, which can ground the current passing through the motor shaft, thereby eliminating the shaft current, avoiding bearing damage, extending the service life of the motor bearing, and ensuring the safe operation of the motor set.
[0020] like Figure 1 , 2 As shown, the protrusion 13 on one side of the base surface of the arc plate 11 can be welded or integrally formed with the arc plate 11. Its length can cover the motor shaft according to the actual application scenario, so as to ensure that the motor can operate normally after the whole installation.
[0021] like Figure 1 As shown, the support pin structure 21 is a threaded single-headed pin, and the corresponding protrusion 13 is provided with a threaded hole for installation and fixing.
[0022] like Figure 3 As shown, the structures of the first bracket 22 and the second bracket 23 are mirror images. In this embodiment, they are arranged in an S-shaped curve. The two are rotated around the support pin structure 21 to ensure that the carbon brush sleeve 24 at the lower end is in high fit with the motor shaft. Correspondingly, the main body of both is provided with through holes corresponding to the support pin. The inner layer of the carbon brush sleeve 24 at the lower end of both is sprayed with insulating material to prevent the carbon brush body 31 from leading the current to the motor housing during current elimination operation, thus avoiding unnecessary damage.
[0023] like Figure 1 , 3 As shown, the carbon brush structure 3 includes a carbon brush body 31 mounted on a carbon brush sleeve 24. The corresponding carbon brush sleeve 24 should be provided with fasteners 26 for fixing the carbon brush body 31. In addition, a terminal block 32 is fixedly installed between the carbon brush body 31 and the carbon brush sleeve 24. The terminal block 32 is pressed against the surface of the carbon brush body 31 by the fasteners 26 to guide the current drawn from the carbon brush to the grounding wire 33 connected to the terminal block 32.
[0024] like Figure 1 , 2 As shown, the adjusting component 4 is a tension spring, with connecting protrusion 25 and connecting ear structure 12 connected to its two ends respectively. The tension of the tension spring causes the upper ends of the first bracket 22 and the second bracket 23 to be subjected to tension towards the arc plate 11, thereby allowing the carbon brush body 31 to be tightly attached to the surface of the motor shaft. At the same time, since the arc plate 11 is fixed to the motor end cover, the tension of the tension spring ensures stability during use.
[0025] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0026] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.
Claims
1. A motor bearing protection device, characterized in that: It includes an end cap connector (1) and a scissor mount (2) mounted on the end cap connector (1). A carbon brush structure (3) is installed at the end of the scissor mount (2). An adjustment element (4) is provided between the scissor mount (2) and the end cap connector (1). The carbon brush structure (3) is grounded.
2. The motor bearing protection device as described in claim 1, characterized in that: The end cap connecting seat (1) includes an arc plate (11), which has through holes (111) at both ends and connecting ear structures (12) on the outer arc surface at both ends. In addition, a protrusion (13) is provided on one side base surface of the arc plate (11), and the scissor mounting bracket (2) is installed on the protrusion (13).
3. The motor bearing protection device as described in claim 2, characterized in that: The scissor mounting bracket (2) includes a support pin structure (21) fixed to the side base of the protrusion block (13). The support pin structure (21) is provided with a first bracket (22) and a second bracket (23). The first bracket (22) and the second bracket (23) are rotatably mounted with the support pin structure (21) as the rotation center, and both of them are provided with carbon brush sleeves (24) at their lower ends. The carbon brush structure (3) is installed in the carbon brush sleeves (24). In addition, the first bracket (22) and the second bracket (23) are provided with connecting protrusions (25) at their upper ends.
4. The motor bearing protection device as described in claim 3, characterized in that: The carbon brush structure (3) includes a carbon brush body (31) mounted on the carbon brush sleeve (24). The corresponding carbon brush sleeve (24) should be provided with fasteners (26) for fixing the carbon brush body (31). In addition, a terminal block (32) is fixedly installed between the carbon brush body (31) and the carbon brush sleeve (24), and a grounding wire (33) is connected to the terminal block (32).
5. The motor bearing protection device as described in claim 4, characterized in that: The adjusting member (4) is a tension spring, with its two ends connected to the connecting protrusion (25) and the connecting ear structure (12), respectively.