CN100566098C - A kind of piston structure magnetic head for vehicle permanent magnet speed buffer - Google Patents
A kind of piston structure magnetic head for vehicle permanent magnet speed buffer Download PDFInfo
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- CN100566098C CN100566098C CNB2007100997547A CN200710099754A CN100566098C CN 100566098 C CN100566098 C CN 100566098C CN B2007100997547 A CNB2007100997547 A CN B2007100997547A CN 200710099754 A CN200710099754 A CN 200710099754A CN 100566098 C CN100566098 C CN 100566098C
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- magnetic
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- permanent magnet
- cylinder assembly
- guiding loop
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
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- Dynamo-Electric Clutches, Dynamo-Electric Brakes (AREA)
Abstract
The present invention relates to a kind of auxiliary brake device for automobile, be specially a kind of piston structure magnetic head for vehicle permanent magnet speed buffer.Mainly include cylinder assembly and piston component, cylinder assembly includes shell (1), the magnetic guiding loop (3) of fixedlying connected with the inwall of shell (1) and non-magnetic guiding loop (4), non-magnetic guiding loop (4) be arranged in magnetic guiding loop (3) directly over; Piston component includes by non-magnetic conduction screw (12) and connects all-in-one-piece upper conduction magnetic board (5), permanent magnet (7) and following magnetic conductive board (2), permanent magnet (7) is arranged in upper conduction magnetic board (5) and following fixedly between the soft iron (2), piston component is arranged on the inside of cylinder assembly and can moves up and down along the inwall of cylinder assembly, realizes control to the magnetic head operating state by changing the movement position of piston component in cylinder assembly.The present invention has advantages such as machining is simple, motion credibility is high, leakage flux is little when working, braking moment is big.
Description
Technical field
The present invention is that a kind of permanent magnet that utilizes is originated as braking force, by the reverse eddy current braking power that produces in rotation and non-contacting rotor the complemental brake system that automobile slows down is specially the piston structure magnetic head that a kind of vehicle permanent magnet speed buffer is used.
Background technology
Retarder is a kind of safe servicing unit of service brake, and it affacts braking force on the output shaft, plays the effect that reduces automobile driving speed.The retarder that generally adopts both at home and abroad mainly contains Retarder and current vortex retarder at present, although their operation principle is different, as a kind of complemental brake system, its effect is clearly.And the permanent magnet retarder is the permanent magnet formation magnetic field by self, plays retarded acting, therefore almost unregulated power consumption.
The maximum characteristics of permanent-magnet buffer are: 1, can realize significantly lightweight, miniaturization; 2, consume electric power hardly; 3, continuously practically self can not produce overheatedly, can constantly keep the stability and the persistence of braking force; 4, the strong resistance magnetic field that permanent magnetism produced has hardware features; 5, maintenance is simple, only need make regular check on the air air gap and get final product.
At present, be used for the permanent-magnet speed buffer of the auxiliary manufacturing system of automobile, multiple structure is arranged.It is cylindrical that Chinese patent " permanent-magnet eddy current retarder for vehicle " (patent No. ZL2006100579927) discloses a kind of integral body, by the permanent-magnet speed buffer magnetic head of magnetic guiding loop motion control structure.The two ends that this magnetic head is configured to a neodymium-iron-boron permanent magnet are separately fixed on the stepped counterbore and magnetic conductive board of magnetic guiding jar, movable magnetic guiding loop and the magnetic conductive board outside and magnetic guiding jar tight fit inside, be provided with in the gap of neodymium-iron-boron permanent magnet and magnetic guiding jar inboard that exhausted magnetic material constitutes cylinder, can prevent magnetic line of force short circuit.When movable magnetic guiding loop contacted with magnetic conductive board, the magnetic line of force of Nd-Fe-B permanent magnet was shielded from the magnetic guiding jar, and magnetic head does not externally show magnetic, and automobile is in the cruising state.When promotion activity magnetic guiding loop and magnetic conductive board disengaging, and away from the neodymium-iron-boron permanent magnet magnetic pole, magnetic head externally shows magnetic, and automobile is in on-position.Problems such as that the permanent-magnet eddy current retarder magnetic head existence activity magnetic guiding loop machining accuracy of this kind structure requires is high, be difficult to assembling, cost height, motion credibility are low, particularly because the magnetic conductive board thickness of this structure is big, leakage flux is big when causing work, and braking moment is difficult to improve.
Summary of the invention
The objective of the invention is to make a kind of easy to control, machining is simple, motion credibility is high, leakage flux is little, braking moment is big during work vehicle permanent magnet speed buffer magnetic head.This retarder magnetic head both can be used in the desk permanent-magnet retarder, also can be used for hub formula permanent-magnet speed buffer.
The present invention has taked following technical scheme to achieve these goals.This magnetic head mainly includes cylinder assembly and piston component, the non-magnetic guiding loop 4 that cylinder assembly includes shell 1, the magnetic guiding loop 3 of fixedlying connected with the inwall of shell 1 and made by exhausted magnetic material, non-magnetic guiding loop 4 be arranged in magnetic guiding loop 3 directly over and closely contact with the upper surface of magnetic guiding loop 3; Piston component includes upper conduction magnetic board 5, permanent magnet of being made by permeability magnetic material by the non-magnetic conduction screw 12 connection all-in-one-pieces of being made by non-magnet material 7 and the following magnetic conductive board of being made by permeability magnetic material 2, permanent magnet 7 is arranged between upper conduction magnetic board 5 and the following magnetic conductive board 2, piston component is arranged on the inside of cylinder assembly and can moves up and down along the inwall of cylinder assembly, when piston component moved to the lower end of cylinder assembly, upper conduction magnetic board 5, magnetic guiding loop 3, shell 1 and following magnetic conductive board 2 constituted the magnetic conductive loop of sealing.
Also be provided with and be used for last intake interface 9 and the following intake interface 13 that the control piston assembly moves up and down, last intake interface 9 is connected with the upper surface of following magnetic conductive board 2, the lower surface of magnetic guiding loop 3, the cavity that the inwall of shell 1 surrounds, and following intake interface 13 is connected with the lower surface of following magnetic conductive board 2, the cavity that the inwall of shell 1 surrounds.
Operation principle of the present invention and process are: intake interface 13 feeds gases at high pressure instantly, promotion is by upper conduction magnetic board 5, the piston that permanent magnet 7 and following magnetic conductive board 2 are formed moves to the cylinder upper end, and by magnetic guiding loop 3 limited piston positions, see Fig. 2, at this moment owing between upper conduction magnetic board 5 and the shell 1 non-magnetic guiding loop 4 is arranged, its magnetic resistance is far longer than the magnetic resistance that bring in the 1-2mm gap between the outer face of magnetic head and the rotor, the magnetic line of force that permanent magnet 7 produces is through upper conduction magnetic board 5, air-gap, rotor 8, shell 1 and following magnetic conductive board 2 form the loop, the magnetic line of force 6 of promptly working, rotor 8 cutting magnetic lines of high speed rotating, and at its surface generation current vortex, eddy current magnetism produces the torque opposite with the rotor direction of rotation, thereby the generation braking moment, at this moment automobile is in braking state.When last intake interface 9 feeds gases at high pressure, promote the lower surface of magnetic conductive board 2 down, make whole piston move to the lower end of cylinder, see Fig. 3, because the magnetic resistance of magnetic guiding loop 3 is very little, the magnetic line of force of permanent magnet 7 generations at this moment forms loops through upper conduction magnetic board 5, magnetic guiding loop 3, shell 1 and following magnetic conductive board 2, it is the inoperative magnetic line of force 14, the magnetic line of force is without rotor 8, so permanent magnet 6 does not externally show magnetic, automobile normal running.
Major advantage of the present invention is: the magnetic head control magnetic circuit break-make of piston structure is to make the cylindrical piston motion, can reach purpose easy to control, that machining is simple, motion credibility is high like this.And this structure can make the thickness of upper conduction magnetic board reduce, and reaches the purpose of leakage flux when reducing work, thereby increases braking moment.
Description of drawings
Fig. 1 is a cross-sectional view of the present invention;
Magnetic line of force distribution schematic diagram when Fig. 2 is an operating conditions of the present invention;
Magnetic line of force distribution schematic diagram when Fig. 3 is a non-operation of the present invention;
Among the figure: 1, shell, 2, following magnetic conductive board, 3, magnetic guiding loop, 4, non-magnetic guiding loop, 5, upper conduction magnetic board, 6, the work magnetic line of force, 7, permanent magnet, 8, rotor, 9, go up intake interface, 10, upper chamber, 11, lower chamber, 12, non-magnetic conduction screw, 13, intake interface down, 14, the inoperative magnetic line of force.
Embodiment
Describe present embodiment in detail below in conjunction with Fig. 1～Fig. 3.
Referring to accompanying drawing 1～3, present embodiment mainly is made of cylinder assembly and piston component, cylinder assembly comprises shell 1, magnetic guiding loop 3 and the non-magnetic guiding loop 4 of annular, magnetic guiding loop 3 is fixedlyed connected with the inwall of shell 1 by screw thread with non-magnetic guiding loop 4, non-magnetic guiding loop 4 be placed on magnetic guiding loop directly over, and closely contact with the upper surface of magnetic guiding loop 3.Piston component comprises upper conduction magnetic board 5, neodymium-iron-boron permanent magnet 7 and following magnetic conductive board 2, upper conduction magnetic board 5, neodymium-iron-boron permanent magnet 7 and following magnetic conductive board 2 are cylindrical-shaped structure and are coupled to one by non-magnetic conduction screw 12, and permanent magnet 7 is arranged between upper conduction magnetic board 5 and the following magnetic conductive board 2.Piston component is arranged on the inside of cylinder assembly and can moves up and down along the inwall of cylinder assembly, when mobile, the side of upper conduction magnetic board 5 and permanent magnet 7 contacts with the inwall of magnetic guiding loop 3 and non-magnetic guiding loop 4, and the side of following magnetic conductive board 2 contacts with the inwall of shell 1.When piston component moved to the lower end of cylinder assembly, upper conduction magnetic board 5, magnetic guiding loop 3, shell 1 and following magnetic conductive board 2 constituted the magnetic conductive loop of sealing.When magnetic guiding loop 3 moves to the upper end of cylinder assembly at piston component, also play the effect spacing to piston component.
The execution mode of present embodiment is as follows, under the situation of brake, referring to Fig. 2, the solenoid control gases at high pressure enter down intake interface 13, gases at high pressure promote to be moved to by the piston component that upper conduction magnetic board 5, permanent magnet 7 and following magnetic conductive board 2 are formed the upper end of magnetic head, make permanent magnet 7 externally show magnetic, and rotor 8 cutting magnetic lines of high speed rotating produce current vortex, thereby the generation braking moment, automobile is in on-position.
Under the situation of automobile normal running, referring to Fig. 3, the solenoid control gases at high pressure enter intake interface 9, gases at high pressure promote the piston component total movement of permanent magnet 7 and magnetic conductive board composition to the magnetic head lower end, at this moment the magnetic line of force of permanent magnet 7 is shielded in magnetic head inside by magnetic guiding loop 3, and without rotor 8, permanent magnet 7 does not externally show magnetic, automobile normal running.
Magnetic head in the present embodiment also can be used in other occasions, as permanent magnetic crane, permanent magnetic chuck etc.
Claims (2)
1, a kind of piston structure magnetic head for vehicle permanent magnet speed buffer, it is characterized in that: mainly include cylinder assembly and piston component, cylinder assembly includes shell (1), the magnetic guiding loop (3) of fixedlying connected with the inwall of shell (1) and non-magnetic guiding loop (4), non-magnetic guiding loop (4) be arranged in magnetic guiding loop (3) directly over; Piston component includes by non-magnetic conduction screw (12) and connects all-in-one-piece upper conduction magnetic board (5), permanent magnet (7) and following magnetic conductive board (2), permanent magnet (7) is arranged between upper conduction magnetic board (5) and the following magnetic conductive board (2), piston component is arranged on the inside of cylinder assembly and can moves up and down along the inwall of cylinder assembly, when piston component moved to the lower end of cylinder assembly, upper conduction magnetic board (5), magnetic guiding loop (3), shell (1) and following magnetic conductive board (2) constituted the magnetic conductive loop of sealing; When piston component moves to the upper end of cylinder assembly, upper conduction magnetic board (5), be positioned at upper conduction magnetic board (5) outer end and leave the rotor (8), shell (1) in 1mm～2mm gap and the magnetic conductive loop that following magnetic conductive board (2) constitutes sealing with upper conduction magnetic board (5).
2, a kind of piston structure magnetic head for vehicle permanent magnet speed buffer according to claim 1, it is characterized in that: also be provided with and be used for last intake interface (9) and the following intake interface (13) that the control piston assembly moves up and down, last intake interface (9) is connected with the upper surface of following magnetic conductive board (2), the lower surface of magnetic guiding loop (3), the cavity that the inwall of shell (1) surrounds, and following intake interface (13) is connected with the lower surface of following magnetic conductive board (2), the cavity that the inwall of shell (1) surrounds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100997547A CN100566098C (en) | 2007-05-30 | 2007-05-30 | A kind of piston structure magnetic head for vehicle permanent magnet speed buffer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100997547A CN100566098C (en) | 2007-05-30 | 2007-05-30 | A kind of piston structure magnetic head for vehicle permanent magnet speed buffer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101098101A CN101098101A (en) | 2008-01-02 |
| CN100566098C true CN100566098C (en) | 2009-12-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007100997547A Expired - Fee Related CN100566098C (en) | 2007-05-30 | 2007-05-30 | A kind of piston structure magnetic head for vehicle permanent magnet speed buffer |
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| CN (1) | CN100566098C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103248196B (en) * | 2013-04-28 | 2016-01-20 | 北京工业大学 | A kind of permanent-magnet liquid-cooled retarder of multihead structure |
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2007
- 2007-05-30 CN CNB2007100997547A patent/CN100566098C/en not_active Expired - Fee Related
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| CN101098101A (en) | 2008-01-02 |
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Granted publication date: 20091202 Termination date: 20100530 |