CN202167915U - Structure for preventing alternating current motor rotor pressing rings from separating from shaft - Google Patents
Structure for preventing alternating current motor rotor pressing rings from separating from shaft Download PDFInfo
- Publication number
- CN202167915U CN202167915U CN2011203006529U CN201120300652U CN202167915U CN 202167915 U CN202167915 U CN 202167915U CN 2011203006529 U CN2011203006529 U CN 2011203006529U CN 201120300652 U CN201120300652 U CN 201120300652U CN 202167915 U CN202167915 U CN 202167915U
- Authority
- CN
- China
- Prior art keywords
- rotating shaft
- trim ring
- nut
- motor rotor
- axle construction
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The utility model discloses a structure for preventing alternating current motor rotor pressing rings from separating from a shaft, which comprises a rotating shaft. A rotor core is installed on the rotating shaft; the pressing rings are arranged at two ends of the rotor core; the pressing rings are formed on the rotating shaft through interference fit; an external threaded section is arranged on the rotating shaft outside the pressing ring close to a non transmission end of the rotating shaft; a nut is connected with the rotating shaft through the external threaded section and tightly jointed to the pressing ring; a pin hole is formed in a position where the nut is connected with threads of the rotating shaft along the axial direction; and a stop pin is inserted into the pin hole. The structure is simple, and can effectively prevent the pressing rings from being separated from the rotating shaft. When the interference fit between the pressing rings and the rotating shaft is out of run, the lamination pressure of the rotor core can be born by the nut and thread connection on the rotating shaft, and the structural safety is guaranteed. As the stop pin is arranged in the position where the nut and the rotating shaft is connected through the threads, the structure can prevent the thread connection from getting loose after the motor is manufacture and operated for a long time, and guarantees the effective connection between the nut and the rotating shaft.
Description
Technical field
The utility model relates to the structure of AC motor rotor, particularly relates to a kind of AC motor rotor trim ring that prevents and takes off axle construction.
Background technology
As shown in Figure 1, the rotor core of traditional AC motor is directly to fix through the trim ring of interference fit in the rotating shaft, and trim ring and rotating shaft interference fit produce axial force, thereby offsets the expansion lamination pressure of rotor core.But, after working long hours, because the inequality of being heated of trim ring and rotating shaft; Trim ring is heated and expands greatly more; Rotating shaft is heated and is fewly expanded for a short time, thereby has weakened the interference fit between them, therefore can not produce the expansion lamination pressure that enough axial forces are offset rotor core; Thereby cause trim ring to come off, cause electrical fault from rotating shaft.
The utility model content
The purpose of the utility model just provides a kind of AC motor rotor trim ring that prevents and takes off axle construction, can prevent effectively that trim ring from coming off from rotating shaft, overcomes the weak point of above-mentioned prior art.
The purpose of the utility model realizes through following technical proposals:
A kind of AC motor rotor trim ring that prevents takes off axle construction, comprises rotating shaft, and rotor core is installed in the rotating shaft; The two ends of rotor core are provided with trim ring, and trim ring is interference fitted in the rotating shaft, near in the rotating shaft outside the trim ring of rotating shaft non-transmision end an external thread section being set; One nut is connected with rotating shaft through this external screw thread; And fit tightly with trim ring, offer a pin-and-hole vertically in the threaded connection place of nut and rotating shaft, insert latch in the pin-and-hole.
As preferably, the external thread section length in the said rotating shaft is greater than 22mm.
As preferably, the external thread section in the said rotating shaft is provided with one deck screw thread fastening glue, further the fastening effect between stiffnut and the rotating shaft.
As preferably, the outer circumference surface of said nut is evenly equipped with four mounting grooves, makes things convenient for the installation and removal of nut.
As preferably, said latch adopts common straightcarbon steel to process.
As preferably, said latch and pin-and-hole interference fit.
Further, the end face of said nut is not higher than the rotating shaft end face.
The beneficial effect of the utility model is: simple in structure, can prevent effectively that trim ring from coming off from rotating shaft.When the interference fit of trim ring and rotating shaft lost efficacy, the lamination pressure of rotor core was just born by being threaded in nut and the rotating shaft, has guaranteed the fail safe of structure.The threaded connection place of nut and rotating shaft is provided with latch, and it is loosening to prevent that motor is connected with the long-time running rear thread in manufacturing, guarantees that nut is connected with the effective of rotating shaft.
Description of drawings
Fig. 1 is the syndeton sketch map of traditional AC motor rotor core and trim ring and rotating shaft;
Fig. 2 is the structural representation of the utility model;
Fig. 3 is the partial enlarged drawing at I place among Fig. 2;
Fig. 4 is the syndeton sketch map of nut and rotating shaft among Fig. 2.
Embodiment
Below in conjunction with specific embodiment and accompanying drawing the utility model is further described.
Like Fig. 2, Fig. 3 and shown in Figure 4, a kind of AC motor rotor trim ring that prevents takes off axle construction, comprises rotating shaft 1; Rotor core 2 is installed in the rotating shaft 1, and the two ends of rotor core 2 are provided with trim ring 3, and trim ring 3 is interference fitted in the rotating shaft 1; Near the external thread section that a segment length 28mm is set in the rotating shaft 1 outside the trim ring 3 of rotating shaft 1 non-transmision end; And this external thread section is provided with one deck screw thread fastening glue, and a nut 4 is connected with rotating shaft 1 through this external screw thread, and fits tightly with trim ring 3; Offer a pin-and-hole vertically in the nut 4 and the threaded connection place of rotating shaft 1, insert latch 5 in the pin-and-hole.Said latch 5 adopts common straightcarbon steel to process, latch 5 and pin-and-hole interference fit.The end face of said nut 4 is not higher than rotating shaft 1 end face, and distance L is 0.2mm between the both ends of the surface, makes things convenient for the location that cooperates of other parts and rotating shaft 1.
As shown in Figure 4, the outer circumference surface of said nut 4 is evenly equipped with four mounting grooves 6, makes things convenient for the installation and removal of nut 4.
When the interference fit of trim ring 3 and rotating shaft 1 lost efficacy, the lamination pressure of rotor core 2 was just born by being threaded in nut 4 and the rotating shaft 1, has guaranteed the fail safe of structure.Nut 4 is provided with latch 5 with the threaded connection place of rotating shaft 1, and it is loosening to prevent that motor is connected with the long-time running rear thread in manufacturing, guarantees that nut 4 is connected with the effective of rotating shaft 1.
The above is merely the preferred embodiment of the utility model; Not in order to restriction the utility model; Any modification of being done within all spirit and principles at the utility model, be equal to replacement and improvement etc., all should be included within the protection range of the utility model.
Claims (7)
1. one kind prevents that the AC motor rotor trim ring from taking off axle construction, comprises rotating shaft, and rotor core is installed in the rotating shaft; The two ends of rotor core are provided with trim ring, and trim ring is interference fitted in the rotating shaft, it is characterized in that: near in the rotating shaft outside the trim ring of rotating shaft non-transmision end an external thread section being set; One nut is connected with rotating shaft through this external screw thread; And fit tightly with trim ring, offer a pin-and-hole vertically in the threaded connection place of nut and rotating shaft, insert latch in the pin-and-hole.
2. the AC motor rotor trim ring that prevents according to claim 1 takes off axle construction, it is characterized in that: the external thread section length in the said rotating shaft is greater than 22mm.
3. the AC motor rotor trim ring that prevents according to claim 1 and 2 takes off axle construction, and it is characterized in that: the external thread section in the said rotating shaft is provided with one deck screw thread fastening glue.
4. the AC motor rotor trim ring that prevents according to claim 1 takes off axle construction, it is characterized in that: the outer circumference surface of said nut is evenly equipped with four mounting grooves.
5. the AC motor rotor trim ring that prevents according to claim 1 takes off axle construction, it is characterized in that: said latch adopts common straightcarbon steel to process.
6. the AC motor rotor trim ring that prevents according to claim 1 takes off axle construction, it is characterized in that: said latch and pin-and-hole interference fit.
7. the AC motor rotor trim ring that prevents according to claim 1 takes off axle construction, and it is characterized in that: the end face of said nut is not higher than the rotating shaft end face.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203006529U CN202167915U (en) | 2011-08-18 | 2011-08-18 | Structure for preventing alternating current motor rotor pressing rings from separating from shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203006529U CN202167915U (en) | 2011-08-18 | 2011-08-18 | Structure for preventing alternating current motor rotor pressing rings from separating from shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202167915U true CN202167915U (en) | 2012-03-14 |
Family
ID=45803718
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203006529U Expired - Lifetime CN202167915U (en) | 2011-08-18 | 2011-08-18 | Structure for preventing alternating current motor rotor pressing rings from separating from shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202167915U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102290894A (en) * | 2011-08-18 | 2011-12-21 | 南车成都机车车辆有限公司 | Structure for preventing clamping rings of AC motor rotor from falling off shaft |
-
2011
- 2011-08-18 CN CN2011203006529U patent/CN202167915U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102290894A (en) * | 2011-08-18 | 2011-12-21 | 南车成都机车车辆有限公司 | Structure for preventing clamping rings of AC motor rotor from falling off shaft |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120314 Effective date of abandoning: 20130306 |
|
| RGAV | Abandon patent right to avoid regrant |