CN105702526A

CN105702526A - Electromagnetic switch and starter using same

Info

Publication number: CN105702526A
Application number: CN201610149508.7A
Authority: CN
Inventors: 胡光龙
Original assignee: Shanghai Valeo Automotive Electrical Systems Co Ltd
Current assignee: Shanghai Valeo Automotive Electrical Systems Co Ltd
Priority date: 2016-03-16
Filing date: 2016-03-16
Publication date: 2016-06-22
Also published as: WO2017157277A1

Abstract

The invention discloses an electromagnetic switch, which relates to the technical field of starters of an automobile engine and other engines and aims at solving the problem of contact oscillation of the electromagnetic switch in the prior art. The electromagnetic switch comprises an electromagnetic coil, a moving iron core, a static iron core, a contact piece shaft, a contact piece, a bolt and a contact spring, wherein an electromagnetic force generated by the electromagnetic coil drives the moving iron core to push the contact piece shaft to enable the contact piece to be contacted with the bolt; and the contact spring is used for providing pressure when the contact is closed. The electromagnetic switch is characterized by further comprising a damping element for absorbing and reducing vibration.

Description

A kind of electromagnetic switch and use the starter of this electromagnetic switch

Technical field

The present invention relates to the starter technical field of automobile engine and other electromotors, particularly relate to a kind of electromagnetic switch。Meanwhile, the invention also relates to the starter of this electromagnetic switch。

Background technology

Starter (or being called " starter motor ") is used in vehicle, is used for starting the electromotor of vehicle。Starter generally comprises dc motor, drive mechanism and controlling organization。The controlling organization of normally used starter is electromagnetic switch, and it has advantage easy to use, dependable performance。

As shown in Figure 1, electromagnetic switch includes: solenoid 010, dynamic iron core 020, contact axle 030, static iron core 040, contact 050, bolt 060, wherein, during electromagnetic switch work, solenoid 010 produces number of ampere turns, i.e. magnetomotive force, magnetomotive force produces magnetic flux, and magnetic flux circulates in the closure magnetic circuit formed by dynamic iron core 020, static iron core 040, air gap 070, switch housing 080。Under the electromagnetic force of solenoid, contact axle 030 axially moves under the driving of dynamic iron core 020, promotes contact 050 to combine with bolt 060, and in the axial movement of contact axle 030, dynamic iron core 020 and static iron core 040 contact。In prior art, contact spring 090 and the contact 050 of electromagnetic switch are directly connected to, or contact spring 090 is indirectly connected with by pad (not shown) and contact 050。When the electromagnetic switch closing of contact, contact spring 090 is reliable and stable with the contact contacting bolt between 060 for providing stable contact force to make contact 050。

In electromagnetic switch work process, there is twice contact vibration, i.e. the vibration of first time contact and the vibration of second time contact, contact vibration moment can make contact 050 loose contact cause arcing, thus causing that contact 050 galvanic corrosion is serious, time serious, can cause that contact 050 is welded。

As shown in Figure 2, when contact 050 has just touched contact bolt 060 in a flash, now dynamic iron core 020 not yet contacts static iron core 040, air gap 070 also no Guan Bi, due to contact 050 speed quickly, impact force is relatively larger, and contact spring 090 is still uncompressed, and its damped coefficient is only small, it is possible to ignore, now there is first time contact vibration in contact 050 because clashing into bolt 060。

As shown in Figure 2, when contact 050 just contacts contact spring 090, move and between iron core 020 and static iron core 040, yet suffer from certain gap, dynamic iron core 020 continues with high speed motion until clashing into static iron core 040, as shown in Figure 3, very big vibration can be produced in a flash what clash into, vibrate and be delivered to contact site by contact axle 030 and static iron core 040, switch cover and cause that the vibration of second time contact occurs in contact。

For the technical problem overcoming contact to vibrate, prior art realizes more stablizing by the contact spring power of enlarged contact spring further firm fixes contact。While it is true, this technical scheme yet suffers from the deficiency of two aspects: time 1, due to contact first time generation vibration, contact spring is still uncompressed, and therefore, this technical scheme cannot solve first time contact oscillation problem；2, when the contact spring power of contact spring becomes big, solenoid certainly will need to provide bigger electromagnetic force to overcome this contact spring power, and this will imply that solenoid needs more copper coil, and electromagnetic switch volume increases, and cost also can be further up。

In view of this, how to design a kind of new electromagnetic switch, to eliminate drawbacks described above of the prior art and deficiency, be the problem that person skilled is urgently to be resolved hurrily in the industry。

Summary of the invention

In order to overcome the contact oscillation technology problem of electromagnetic switch in prior art, the invention provides that a kind of contact vibration low (not being probability, it is simply that reduce), functional reliability be strong, the electromagnetic switch of low cost of manufacture。

In order to realize foregoing invention purpose, the invention discloses a kind of electromagnetic switch, including: a solenoid, a dynamic iron core, a static iron core, a contact axle, a contact, a bolt and a contact spring, described solenoid produces an electromagnetic force and drives described dynamic iron core to promote described contact axle, make described contact and described threaded bolt contacts, described contact spring is for providing the pressure during closing of contact, it is characterized in that, described electromagnetic switch also includes a damping element, and described damping element is for absorbing and lowering vibration。

Further, described damping element is between described contact and described contact spring。

Further, having a heat insulating mattress between described damping element and described contact, described heat insulating mattress separates for the hot and described damping element produced by described contact。

Further, there is a pad between described damping element and described contact spring。

Further, the quantity of described damping element is N number of, and N is the integer more than or equal to 1。

Further, described damping element is cellular or video disc shape or bulk。

Further, described damping element is made up of Rubber materials。

The invention also discloses a kind of starter, including the electromagnetic switch described in any of the above-described item, start motor and drive mechanism, it is characterised in that described electromagnetic switch is used for controlling the conducting of described starting motor or stopping, described drive mechanism, for passing to an electromotor by described moment of torsion。

Compared with prior art, technical scheme provided by the present invention has the advantage that first, passes through to connect the damping element of contact spring with high damped coefficient, effectively reduces contact vibration, and electromagnetic switch is run more reliable and more stable；The second, after contact spring is connected with the damping element of high damped coefficient, vibrate damped element effectively to absorb, now can suitably reduce the contact spring power of contact spring, reduce the copper consumption of solenoid, reduce the volume of electromagnetic switch, reduce the manufacturing cost of electromagnetic switch。

Accompanying drawing explanation

Can be described in detail by invention below about the advantages and spirit of the present invention and institute's accompanying drawings is further understood。

Fig. 1 is the structural representation of electromagnetic switch in prior art；

Fig. 2 be in prior art electromagnetic switch be in first time contact vibration time structural representation；

Fig. 3 is that in prior art, electromagnetic switch is in structural representation when second time contact vibrates；

Fig. 4 is the structural representation of electromagnetic switch provided by the present invention。

Detailed description of the invention

Specific embodiments of the invention are described in detail below in conjunction with accompanying drawing。But, it should the present invention is understood as and is not limited to this embodiment described below, and the other technologies combination that the technical concept of the present invention can be identical with other known technologies or function and those known technologies is implemented。

In the explanation of specific examples below, in order to clearly show that structure and the working method of the present invention, to be described by many Directional words, but by the Word Understanding such as "front", "rear", "left", "right", " outward ", " interior ", " outwards ", " inwardly ", " axially ", " radially " for convenience of term, and word of limitation should be not construed as。Additionally, the air part that " air gap " word used in the following description refers between dynamic iron core and static iron core, during switch Guan Bi, gas length tapers into。

It is an object of the invention to provide a kind of electromagnetic switch, it is achieved effectively reduce contact vibration, improve electromagnetic switch functional reliability, and reduce the manufacturing cost of electromagnetic switch further。

Specific embodiments of the invention are described in detail below in conjunction with accompanying drawing 4。

Fig. 4 is the structural representation of electromagnetic switch provided by the present invention。As shown in Figure 4, electromagnetic switch provided by the present invention includes: solenoid 101, dynamic iron core 102, contact axle 103, static iron core 104, contact 105, bolt 106, wherein, during electromagnetic switch work, solenoid 101 produces number of ampere turns, i.e. magnetomotive force, magnetomotive force produces magnetic flux, and magnetic flux circulates in the closure magnetic circuit formed by dynamic iron core 102, static iron core 104, air gap 107, switch housing 108。Under the electromagnetic force of solenoid 101, contact axle 103 axially moves under the driving of dynamic iron core 102, contact 105 is promoted to combine with the bolt 106,114 being fixed on switch cover 109, in the axial movement of contact axle 103, dynamic iron core 102 and static iron core 104 contact, wherein, bolt 106 is starter motor even, and bolt 114 is accumulator even。

One end of contact axle 103 and dynamic iron core 102 are fixed as one, the other end is then sequentially arranged with limiting retainer ring 110, contact 105, heat insulating mattress 111, damping element 112 and contact spring 113, limiting retainer ring 110 is for providing position-limiting action to contact 105, heat insulating mattress 111 and damping element 112, it is prevented that above-mentioned parts is moved on contact axle 103；The heat insulating mattress 111 being made up of thermal insulation material is between contact 105 and damping element 112, and this part separates with damping element 112 for the heat produced by contact 105；Damping element 112, between heat insulating mattress 111 and contact spring 113 and can relatively slide by contact axle, this part is made up of the material that damped coefficient is higher, hard rubber or other height if damped coefficient is 1 damp coefficient element, damping element can adopt cellular or video disc shape to improve damping effect, and high damped coefficient damping element can better absorb and lower vibration；Contact spring 113 is sheathed on contact axle 103, the shaft shoulder of two ends respectively contact axle 103 and damping element 112, and it can move along the axial direction of contact axle 103, for providing the pressure during closing of contact。

Damping element and contact spring series design, both the mode stablizing contact force can be provided to reduce contact vibration by contact spring, the mode that can be absorbed and lower vibration by the damping element of high damped coefficient again reduces contact vibration, in combination with, further increase the reliability of contact work。Specifically, when contact first time vibrates, contact is contact bolt just, and the damped coefficient of contact spring is ignored substantially, so, even if now increasing the spring force of contact spring, contact vibration is substantially without improving。And the damping element of high damped coefficient can absorb and lower vibration, such that it is able to significantly decrease the first time vibration of contact；When contact second time is vibrated, dynamic iron core and the mutual making contact of static iron core, contact spring is in confined state, now, although the contact spring power increasing contact spring can reduce the vibration of contact, but contact spring power greatly then needs bigger electromagnetic force to overcome this spring force, namely more copper coil is needed, the volume causing electromagnetic switch is increased and cost increase by this, based on this, solution provided by the present invention is the damping element of one high damped coefficient of series connection on the basis of contact spring, damping element can absorb and reduce contact vibration, so not only need not additionally increase contact spring power, even can also reduce contact spring power, thus saving the copper consumption of coil, reduce the volume of electromagnetic switch, reduce the manufacturing cost of electromagnetic switch。

Those of ordinary skill in the art should know, the quantity of damping element is not limited to one, and when damping element is heat-resistance type damping element, the heat insulating mattress in electromagnetic switch can also save。Meanwhile, those of ordinary skill in the art can also place pad between damping element and contact spring。

Compared with prior art, electromagnetic switch provided by the present invention has the advantage that first, passes through to connect the damping element of contact spring with high damped coefficient, effectively reduces the probability of contact vibration, and electromagnetic switch is run more reliable and more stable；The second, after contact spring is connected with the damping element of high damped coefficient, vibrate damped element effectively to absorb, now can suitably reduce the contact spring power of contact spring, reduce the copper consumption of solenoid, reduce the volume of electromagnetic switch, reduce the manufacturing cost of electromagnetic switch。

If no special instructions, herein presented be similar to " first ", the qualifier of " second " does not mean that the restriction to time sequencing, quantity or importance, and is only used to distinguish a technical characteristic in the technical program mutually with another technical characteristic。Similarly, the herein presented qualifier being similar to " " does not mean that the restriction to quantity, but describes the technical characteristic not occurred in the preceding article。Similarly, herein before number occur be similar to " about ", the modifier of " approx " generally comprises this number, and its concrete implication should in conjunction with context meaning understanding。Not only similarly, only there is the noun that specific quantity measure word is modified, otherwise should regard as in this article and comprise singulative but also comprise plural form, namely this technical scheme can include this technical characteristic of odd number, it is also possible to include this technical characteristic a plurality of。

The preferred embodiment of the simply present invention described in this specification, above example is only in order to illustrate technical scheme but not limitation of the present invention。All those skilled in the art, all should be within the scope of the present invention under this invention's idea by the available technical scheme of logical analysis, reasoning, or a limited experiment。

Claims

1. an electromagnetic switch, including: a solenoid, a dynamic iron core, a static iron core, a contact axle, a contact, a bolt and a contact spring, described solenoid produces an electromagnetic force and drives described dynamic iron core to promote described contact axle, make described contact and described threaded bolt contacts, described contact spring is for providing the pressure during closing of contact, it is characterized in that, described electromagnetic switch also includes a damping element, and described damping element is for absorbing and lowering vibration。

2. electromagnetic switch as claimed in claim 1, it is characterised in that described damping element is between described contact and described contact spring。

3. electromagnetic switch as claimed in claim 1, it is characterised in that having a heat insulating mattress between described damping element and described contact, described heat insulating mattress separates for the hot and described damping element produced by described contact。

4. electromagnetic switch as claimed in claim 1, it is characterised in that there is between described damping element and described contact spring a pad。

5. electromagnetic switch as claimed in claim 1, it is characterised in that the quantity of described damping element is N number of, and N is the integer more than or equal to 1。

6. electromagnetic switch as claimed in claim 1, it is characterised in that described damping element is cellular or video disc shape or bulk。

7. electromagnetic switch as claimed in claim 1, it is characterised in that described damping element is made up of Rubber materials。

8. a starter, including the electromagnetic switch as described in any one of claim 1 to 7, start motor and drive mechanism, it is characterised in that described electromagnetic switch is used for controlling the conducting of described starting motor or stopping, described drive mechanism, for passing to an electromotor by described moment of torsion。