CN201247743Y

CN201247743Y - Electromagnetic switch

Info

Publication number: CN201247743Y
Application number: CNU2008201273152U
Authority: CN
Inventors: 陆泽平; 胡光辉
Original assignee: 陈军锋
Priority date: 2008-07-25
Filing date: 2008-07-25
Publication date: 2009-05-27
Anticipated expiration: 2018-07-25

Abstract

The utility model relates to an electromagnetic switch which comprises a dustproof cover (1), a shell (4) and a switch box (9), wherein the dustproof cover (1) is connected with the shell (4) by a movable iron core (2) and a movable iron core restoring spring (3), a main coil (6) and a secondary coil (7) are arranged in the shell (4) and the switch box (9), the main coil is made of low-carbon copperizing iron wires, a synthetic fiberglass pipe is wrapped outside the main coil, the main coil is wound in a spring shape, the outside diameter of the main coil is little greater than the inside diameter of the switch shell (4), and the main coil is elastically matched with an inner hole of the switch shell (4); the secondary coil (7) is distributed in an inner layer, adopts inner thrum ground design, is directly wound on the surface of a copper pipe, an auxiliary contact piece protecting box (10) is connected with the switch box (9) by bolts (11), the turn number of the main coil (6) is from 10 turns to 15 turns, the main coil (6) is electrically matched with the inner hole of the shell (4) by a rubber protection pad (5), and a fixed iron core (8) is inserted into the copper pipe wound by the secondary coil (7), then is arranged into the switch box (9) and is combined with the shell (4) into a whole.

Description

A kind of electromagnetic switch

Technical field

The utility model relates to a kind of electromagnetic switch, relates in particular to a kind of anti-electromagnetic switch of burning of slow engaging starter that is used for.

Background technology

At present, owing to the fast development of the bigger deceleration type starter of moment of torsion, the positively engaging mode that original starter adopts is because mill teeth becomes no longer suitable easily.So the mode of slow engagement occurred, made that the mill teeth problem has obtained solving preferably.But because slow engagement start mode needs the powerful main coil current support of switch, so require main coil resistance to reduce significantly, its major function is that main transformer is to be main by electric current by original generation electromagnetic force also, expensive enamelled wire haves no alternative but be used as the resistor use, and this will cause the significantly raising of cost; Simultaneously owing to be subjected to the restriction of various factors, the design of existing switch is because main coil current density is excessive, radiating condition extreme difference and when the common apical tooth fault of starter, very easily burning, and therefore, this problem has become the subject matter of slow engagement start mode.

The utility model content

For overcoming the deficiencies in the prior art, the utility model provides a kind of energy fine satisfied slow engaging starter main coil current requirement, and can high temperature resistantly, anti-burn, and can significantly save the cost techniques scheme again.

For achieving the above object, the utility model is realized by following technical solution:

A kind of electromagnetic switch comprises dust cover 1, housing 4 and switch enclosure 9; Described dust cover 1 is connected with housing 4 with moving iron core return-spring 3 by moving iron core 2; Be provided with main coil 6 and secondary coil 7 in housing 4 and the switch enclosure 9, main coil 6 adopts the low-carbon (LC) copper coated iron wires to make, and is wrapped with machine silex glass fibre pipe, and its coiled external diameter than the big slightly spring-like of housing 4 internal diameters and with housing 4 in resilient engagement; Secondary coil 7 arranges that for internal layer the end of a thread bonding design in adopting is directly around copper pipe surface; Auxiliary contact protection box 10 is connected with switch enclosure 9 by screw 11.The number of turn of described main coil 6 is 10～15 circles, and main coil 6 is by rubber fender 5 and housing 4 interior resilient engagement; Static iron core 8 is inserted in copper pipe inside that secondary coil 7 twines and inserts then in the switch enclosure 9 and with housing 4 and be coupled to an integral body.

Compared with prior art, the beneficial effects of the utility model are: can finely satisfy slow engaging starter main coil current requirement, and can high temperature resistantly, anti-burn, can significantly save cost again.

Description of drawings

For ease of better understanding the utility model, the spy is illustrated in conjunction with the accompanying drawings.

Fig. 1 is the shape schematic diagram before each parts of the utility model internal structure are installed;

Fig. 2 is the shape schematic diagram after each parts of the utility model are installed.

The utility model content

For ease of better understanding the utility model, the spy is illustrated in conjunction with specific embodiments, but present embodiment should not regarded as any restriction of the present utility model.

A kind of electromagnetic switch comprises dust cover 1, housing 4 and switch enclosure 9; See Fig. 1.Described dust cover 1 is connected with housing 4 with moving iron core return-spring 3 by moving iron core 2; Be provided with main coil 6 and secondary coil 7 in housing 4 and the switch enclosure 9, main coil adopts the low-carbon (LC) copper coated iron wire to make, and is wrapped with machine silex glass fibre pipe, and its coiled external diameter than the big slightly spring-like of switch case 4 internal diameters and with switch case 4 endoporus resilient engagement; Secondary coil 7 arranges that for internal layer the end of a thread bonding design in adopting is directly around copper pipe surface; Auxiliary contact protection box 10 is connected with switch enclosure 9 by screw 11.The number of turn of described main coil 6 is 10～15 circles, and main coil 6 is by rubber fender 5 and housing 4 endoporus resilient engagement; Static iron core 8 is inserted in copper pipe inside that secondary coil 7 twines and inserts then in the switch enclosure 9 and with housing 4 and be coupled to an integral body, sees Fig. 2.

Main coil 6 adopts the low-carbon (LC) copper coated iron wires, wraps up in the high silicone glass fibre pipe of heatproof outward, and its coiled external diameter than the big slightly spring-like of switch case 4 internal diameters, make main coil 6 resilient engagement in switch case 4.The heatproof that can make main coil 6 like this by 100 ℃ of original enamelled wire rise to that fiberglass pipe can bear more than 500 ℃; Because main coil 6 directly contacts with housing 4, can make heat become the heat loss through conduction mode on the other hand by original heat loss through radiation mode.So both improved temperature resistant grade, also improved radiating efficiency greatly.Because this programme has substituted the copper enamelled wire of original costliness with copper coated iron wire, production cost is reduced greatly in addition, serviceability is further promoted simultaneously.

Secondary coil 7 arranges that by original skin changing internal layer into arranges that electromagnetic efficiency significantly improves; Because the design of interior the end of a thread bonding, insulating protective layer that need not be thicker during inner ring coiling so just can adopt directly around the method for copper pipe surface, not only saves time, and the while is the cost-saving also, has improved radiating efficiency especially.

Utilize above-mentioned technical scheme, this switch does not still have the case of burning and finds in the normal use of reality.

Claims

1, a kind of electromagnetic switch comprises dust cover (1), housing (4) and switch enclosure (9); It is characterized in that: described dust cover (1) is connected with housing (4) with moving iron core return-spring (3) by moving iron core (2); Be provided with main coil (6) and secondary coil (7) in housing (4) and the switch enclosure (9), main coil (6) adopts the low-carbon (LC) copper coated iron wire to make, be wrapped with machine silex glass fibre pipe, its coiled external diameter than the big slightly spring-like of housing (4) internal diameter and with housing (4) endoporus resilient engagement; Secondary coil (7) arranges that for internal layer the end of a thread bonding design in adopting is directly around copper pipe surface; An auxiliary contact protection box (10) is connected with switch enclosure (9) by screw (11).

2, electromagnetic switch according to claim 1 is characterized in that: described main coil (6) number of turn is 10～15 circles, and main coil (6) is by rubber fender (5) and housing (4) endoporus resilient engagement; A static iron core (8) is inserted in copper pipe inside that secondary coil (7) twines and inserts then in the switch enclosure (9) and with housing (4) and be coupled to an integral body.