CN2735642Y - Magnetic rotor structure of step motor - Google Patents
Magnetic rotor structure of step motor Download PDFInfo
- Publication number
- CN2735642Y CN2735642Y CN 200420090243 CN200420090243U CN2735642Y CN 2735642 Y CN2735642 Y CN 2735642Y CN 200420090243 CN200420090243 CN 200420090243 CN 200420090243 U CN200420090243 U CN 200420090243U CN 2735642 Y CN2735642 Y CN 2735642Y
- Authority
- CN
- China
- Prior art keywords
- permanent magnet
- magnetic rotor
- driving member
- transverse part
- utility
- 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.)
- Ceased
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- Electrically Driven Valve-Operating Means (AREA)
Abstract
The utility model relates to the magnetic rotor of a step motor. The technical problem needed to solve is that the existing magnetic rotor structure makes the total height of the valve body too high. The technical proposal of the utility model comprises a cylindrical permanent magnet and a transmission element. The magnetic rotor of a step motor is characterized in that the transmission element is provided with a transverse part which is connected on the inner side wall of the permanent magnet by injection molding, and a hollow cavity is formed between the upper part of the transverse part and the permanent magnet. The transmission element of the utility model is connected in the permanent magnet by the transverse part on the transmission element, effectively decreasing the total height of the valve body.
Description
Technical field
The utility model relates to the magnetic rotor structure in the electric expansion valve, specifically a kind of magnet rotor of stepping motor.
Background technology
Electric expansion valve is the typical products that stepping motor is used, and is made up of valve body I and coil II, as shown in Figure 1.Give coil II break-make continuous pulse current, make the tooth in the coil extremely go up the magnetic pole that produces alternate, thereby drive the permanent magnet rotor 1 ' rotation in the valve body I, by driving member 2 ' the screw thread transmission, convert moving up and down of needle to, by change valve port circulation area, thereby realize from taking over the accurate control of A to the flow of taking over B (or from B to A).Simultaneously, the stroke by the permanent magnet rotor 1 of retainer 3 ' limit ' up and down.Permanent magnet rotor 1 ' effect be under coil II drives, produce and circumferentially turn to, become axially straight moving by self screw thread.Existing magnet rotor partly is made up of cylindric permanent magnet and driving member two, as shown in Figure 2, because the transverse part of driving member and the top of permanent magnet are injection molded into one, are the stroke of assurance magnet rotor 1 ' move up and down, and make the overall height of valve body higher.
The utility model content
Technical problem to be solved in the utility model is to overcome the defective that above-mentioned prior art exists, and a kind of magnetic rotor structure that can effectively reduce the valve body overall height is provided.
The technical solution of the utility model is as follows: the magnetic rotor structure of stepping motor, comprise cylindric permanent magnet and driving member, and it is characterized in that the transverse part of described driving member is connected by injection moulding on the madial wall of permanent magnet, form a cavity between transverse part top and permanent magnet.The utility model is built in the transverse part of driving member in the permanent magnet, makes transverse part top vacate cavity, makes things convenient for retainer to stretch in the cavity, thereby has reduced the overall height of valve body effectively.
The transverse part that further technical scheme of the present utility model is a driving member is connected the middle part of permanent magnet madial wall.Driving member is in the middle part of permanent magnet, and both connect in the injection moulding mode, is H shape, be used to improve the anti-radial impact ability of permanent magnet, and the overall height of valve body is lower.
The magnetic rotor structure of described stepping motor, driving member is provided with screw thread, and screw thread is used for magnet rotor is connected valve body.
The beneficial effects of the utility model are: because the transverse part of driving member is built in the permanent magnet, make transverse part top vacate cavity, make things convenient for retainer to stretch in the cavity, thereby reduced the overall height of valve body effectively; When the point of attachment of driving member and permanent magnet during, improved the anti-radial impact ability of permanent magnet at the magnet middle part.
Below in conjunction with drawings and Examples the utility model is further described.
Description of drawings
Fig. 1 is the structural representation of electric expansion valve.
Fig. 2 is the structural representation of existing magnet rotor.
Fig. 3 is the structural representation of the utility model one embodiment.
Fig. 4 is the structural representation of another embodiment of the utility model.
Embodiment
Embodiment 1: as shown in Figure 3, the magnetic rotor structure of stepping motor, comprise cylindric permanent magnet 1 and be with externally threaded driving member 2, the performance characteristic of permanent magnet is that periphery fills multiple tracks N, S magnetic pole, the transverse part 4 of driving member is connected the madial wall top of permanent magnet 1,1 of transverse part 4 tops and permanent magnet form a cavity 3, and the end face of driving member 2 is equal with the end face of permanent magnet 1.
Embodiment 2: as shown in Figure 4, be with the difference of embodiment 1: the transverse part 4 of driving member is connected the middle part of permanent magnet 1 madial wall by injection moulding, and the screw thread on the driving member 2 is an internal thread.
Claims (3)
1, the magnetic rotor structure of stepping motor comprises cylindric permanent magnet (1) and driving member (2), it is characterized in that the transverse part (4) of described driving member is connected on the madial wall of permanent magnet (1), forms a cavity (3) between transverse part (4) top and permanent magnet (1).
2, the magnetic rotor structure of stepping motor according to claim 1 is characterized in that the transverse part (4) of driving member is connected the middle part of permanent magnet (1) madial wall.
3, the magnetic rotor structure of stepping motor according to claim 1 is characterized in that driving member (2) is provided with screw thread.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420090243 CN2735642Y (en) | 2004-09-17 | 2004-09-17 | Magnetic rotor structure of step motor |
| JP2005262766A JP2006097892A (en) | 2004-09-17 | 2005-09-09 | Electric-operated valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420090243 CN2735642Y (en) | 2004-09-17 | 2004-09-17 | Magnetic rotor structure of step motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2735642Y true CN2735642Y (en) | 2005-10-19 |
Family
ID=35265503
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420090243 Ceased CN2735642Y (en) | 2004-09-17 | 2004-09-17 | Magnetic rotor structure of step motor |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2006097892A (en) |
| CN (1) | CN2735642Y (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101956830B (en) | 2009-07-17 | 2013-06-12 | 浙江三花股份有限公司 | Electronic expansion valve |
| CN103470785A (en) * | 2013-09-30 | 2013-12-25 | 苏州优冷机电科技有限公司 | Electronic expansion valve |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60182577U (en) * | 1984-05-15 | 1985-12-04 | 株式会社 鷺宮製作所 | Stopper in electric control valve |
| JPS6263282A (en) * | 1986-05-09 | 1987-03-19 | Saginomiya Seisakusho Inc | Motor-operated control valve |
| JPS6334384A (en) * | 1986-07-26 | 1988-02-15 | Nippon Ranko Kk | Flow control valve |
| JP3126270B2 (en) * | 1993-10-20 | 2001-01-22 | 株式会社不二工機 | Electric flow control valve, rotor for the valve, and method for manufacturing the rotor |
| JPH08237915A (en) * | 1995-12-14 | 1996-09-13 | Fuji Koki Seisakusho:Kk | Electric motor |
| JP3886084B2 (en) * | 1999-04-01 | 2007-02-28 | 日本電産サンキョー株式会社 | Flow control device |
| JP2001208231A (en) * | 2000-01-21 | 2001-08-03 | Ranco Japan Ltd | Motor operated valve |
| JP4336866B2 (en) * | 2000-10-17 | 2009-09-30 | 株式会社デンソー | Heat pump cycle |
| JP4486802B2 (en) * | 2003-01-17 | 2010-06-23 | 株式会社鷺宮製作所 | Motorized valve |
-
2004
- 2004-09-17 CN CN 200420090243 patent/CN2735642Y/en not_active Ceased
-
2005
- 2005-09-09 JP JP2005262766A patent/JP2006097892A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| JP2006097892A (en) | 2006-04-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C35 | Partial or whole invalidation of patent or utility model | ||
| IW01 | Full invalidation of patent right |
Decision date of declaring invalidation: 20110628 Decision number of declaring invalidation: 16798 Granted publication date: 20051019 |