CN101514665A - Starter solenoid switch with improved arrangement of resistor - Google Patents
Starter solenoid switch with improved arrangement of resistor Download PDFInfo
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- CN101514665A CN101514665A CNA2009100056839A CN200910005683A CN101514665A CN 101514665 A CN101514665 A CN 101514665A CN A2009100056839 A CNA2009100056839 A CN A2009100056839A CN 200910005683 A CN200910005683 A CN 200910005683A CN 101514665 A CN101514665 A CN 101514665A
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Abstract
In a solenoid switch according to the invention, a magnetic plate is disposed on one side of a solenoid coil in an axial direction of the solenoid coil. A contact cover is arranged with the magnetic plate interposed between the contact cover and the solenoid coil in the axial direction. First and second fixed contacts are received in the contact cover and respectively electrically connected to first and second terminals that are to be electrically connected to an electric circuit. A resistor is electrically connected between the first and second terminals to limit current flowing through the electric circuit when the first and second fixed contacts are electrically disconnected by a movable contact. The resistor is received in the contact cover and interposed between the magnetic plate and the first and second fixed contacts in the axial direction.
Description
Technical field
Present invention relates in general to a kind of magnetic switch (or solenoid switch) of controlling the starter motor power supply.Especially, the present invention relates to a kind of magnetic switch that improved resistance is arranged that has, described resistance is used for the electric current of supply on restriction to starter motor.
Background technique
Japan Patent No.3767550, the English patent of its correspondence is a U.S. Patent No. 6,923,152B2 discloses a kind of starter motor that is used to start explosive motor, the magnetic switch that it comprises motor and is used for driving two stages described motor.
More specifically, described magnetic switch comprises a pair of main contact, a pair of secondary contact and resistance.Described main contact and described secondary contact are connected in parallel on from battery to the starter circuit capable of motor supply electric power.Resistance is connected with described secondary contact in described circuit.
In the start-up function process, in the phase I, has only described secondary contact closure, so that to the restriction electric current of described motor supply by described resistance limits.Thereby motor powers up and low speed rotation, makes the easier engagement of gear ring of the small gear and the motor of starter motor.In case small gear and gear ring form engagement, closed main contact in second stage then so that provide the full voltage of battery to motor, makes the motor high speed rotating.
In addition, in magnetic switch, resistance is arranged in the fixture that resin makes, and makes resistance surround the outer radial periphery of electromagnetic coil and form an air gap between resistance and electromagnetic coil.
But in the above-mentioned layout of resistance, the amount that the external diameter of described magnetic switch increases is equivalent to the radial thickness summation of air gap, resistance and fixture.
In addition because the outer radial periphery of electromagnetic coil is fixed device by resistance ring around, so be difficult to the heat that electromagnetic coil produces is radially outwards shed.As a result, the excessive temperature of described electromagnetic coil raises, and has shortened the heat-resistant time of electromagnetic coil.
In order to reduce the temperature of electromagnetic coil, the technician may consider to increase electromagnetic coil.But this will increase the weight of electromagnetic coil and be difficult to make magnetic switch to minimize.
Summary of the invention
Made the present invention based on the problems referred to above.
According to the present invention, a kind of magnetic switch is provided, has comprised: Contact Cover, the first terminal and second terminal, first fixed contact and second fixed contact, movable contact and resistance that magnetic sheet, movable core, the resin of electromagnetic coil, fixed iron core, annular made.Electromagnetic coil has longitudinal axis.Fixed iron core by described electromagnetic coil around.The magnetic sheet of annular is along a side that is axially disposed within described electromagnetic coil of described electromagnetic coil.Described magnetic sheet has the through hole that runs through its radial center formation.Movable core can along the through hole that axially passes described magnetic sheet of described electromagnetic coil towards with move away from described fixed iron core.Contact Cover is arranged to axially described magnetic sheet is clipped between described Contact Cover and the described electromagnetic coil along described electromagnetic coil.The first terminal and second terminal are fixed to described Contact Cover and outwards outstanding so that be connected to circuit from described Contact Cover.First fixed contact and second fixed contact are contained in the described Contact Cover and are electrically connected to the described the first terminal and second terminal respectively.Movable contact is contained in the described Contact Cover and is configured to and moves so that be electrically connected and the electricity disconnection with described first fixed contact and second fixed contact with described movable core.Resistance is connected electrically between the described the first terminal and second terminal with flow through when described first fixed contact and the disconnection of second fixed contact electricity electric current of described circuit of restriction.Described resistance is contained in the described Contact Cover and axially being inserted between described magnetic sheet and described first fixed contact and second fixed contact along described electromagnetic coil.
According to further enforcement of the present invention, described resistance has first end and second end, and described first end and second end are attached to described the first terminal and second terminal respectively and are positioned to inner radial surface intended distance away from described Contact Cover.
Described resistance extends between described first end and second end on perpendicular to the axial plane of described electromagnetic coil and has at least two curved sections.
The thermal resistance of described resistance pre-determines, and when described resistance continued to power up, described resistance melted before described Contact Cover reaches its softening temperature.
The circuit that the described the first terminal and second terminal will be connected to is the circuit that is used for to starter motor supply electric power.
Described magnetic switch also comprises the cup-shaped housing with first portion and second portion.Described first portion comprises the closed end of described housing and described electromagnetic coil is held within it.Described second portion comprises the opening end of described housing and the end of described Contact Cover is cooperated within it.Described first portion has the external diameter littler than described second portion.
Described movable contact be positioned to along described electromagnetic coil axially than described first fixed contact and second fixed contact further from described magnetic sheet.
In the described the first terminal and second terminal each is shaped to bolt.Described first fixed contact and second fixed contact form with described the first terminal and second terminal integral body respectively.
In preferred implementation of the present invention, each in the described the first terminal and second terminal is shaped to the bolt with a hole and two grooves.Described hole is opened on the axial end of described bolt and is had predetermined depth.Described two grooves are formed on the side surface of described bolt and along the radially opposed mutually of described bolt described hole are clipped in therebetween.Described resistance has first end and second end.Described first end insert in the hole of described the first terminal and by radially inwardly the bottom of the groove of the described the first terminal of extrusion-deformation be attached to described the first terminal.Described second end insert in the hole of described second terminal and by radially inwardly the bottom of the groove of described second terminal of extrusion-deformation be attached to described second terminal.
In another preferred implementation of the present invention, each in the described the first terminal and second terminal is shaped to bolt, and described bolt has out on the axial end of described bolt and the hole with predetermined depth.Be provided with solder in the hole of the described the first terminal and second terminal.Described resistance has first end and second end.Thereby the solder that described first end inserts in the hole of described the first terminal and melt in the described hole by a part of the first terminal that only heats around the described hole is attached to described the first terminal.Thereby the solder that described second end inserts in the hole of described second terminal and melt in the described hole by a part second terminal that only heats around the described hole is attached to described second terminal.
In another preferred implementation of the present invention, each in the described the first terminal and second terminal is shaped to bolt, and described bolt has from the excrescence of the outstanding intended distance of axial end of described bolt.Described resistance has first end and second end, and described first end and second end are welded to the described excrescence of the described the first terminal and second terminal respectively.
Description of drawings
The detailed description by hereinafter and the accompanying drawing of the preferred embodiment for the present invention can more fully be understood the present invention, but the invention is not restricted to these specific mode of executions, and these mode of executions only are used to the purpose explaining and understand.
In the accompanying drawings:
Fig. 1 is the planimetric map that comprises according to the starter motor of the magnetic switch of first embodiment of the invention;
Fig. 2 is the circuit diagram of starter motor shown in Figure 1;
Fig. 3 is the partial cross section figure according to the magnetic switch of first mode of execution;
The planimetric map of Fig. 4 shows the inboard of the Contact Cover that is provided with the magnetic switch shown in Figure 3 from the opening end of Contact Cover;
The time diagram of Fig. 5 illustrates the operation of starter motor shown in Figure 1;
Fig. 6 is the partial cross section figure according to the magnetic switch of second embodiment of the invention;
Fig. 7 is the partial cross section figure according to the magnetic switch of third embodiment of the invention; And
The planimetric map of Fig. 8 shows the inboard of the Contact Cover that is provided with the magnetic switch shown in Figure 7 from the opening end of Contact Cover.
Embodiment
To referring to figs. 1 to Fig. 8 preferred implementation of the present invention be described hereinafter.
Should be noted that the purpose of understanding and understanding for clear, the same parts in the different mode of executions of the present invention with identical function under the possible situation in every width of cloth figure with identical reference numerals.
[first mode of execution]
Fig. 1 shows the general structure of the starter motor 1 that is used to start automotive internal combustion engines, and it comprises the magnetic switch 10 according to first embodiment of the invention.Fig. 2 shows the circuit of starter motor 1.
Starter motor 1 comprises: be installed in the shell 2 on the motor (not shown), be fixed to the motor 4 of shell 2 by a plurality of through bolts 3, be configured to mesh so that the moment of motor 4 generations is sent to small gear 6 (see figure 2)s of motor with gear ring 5 (see figure 2)s of motor, be configured to move axially small gear 6 so that driving lever 7 (see figure 2)s of small gear 6 and gear ring 5 engagements or disengage from along starter motor 1, magnetic switch 8 as starter motor 1 main switch, in the start-up function process restriction from battery 12 to the resistance 9 of the electric current of motor 4 supply with according to the magnetic switch 10 as the auxiliary switch of starter motor 1 of present embodiment.Hereinafter, magnetic switch 8 and 10 will abbreviate main switch 8 and auxiliary switch 10 respectively as.
Motor 4 is realized by the commutator motor of type known in this field.
More specifically, as shown in Figure 2, motor 4 comprises: armature 4a, be arranged on armature 4a end (that is the left end portion among Fig. 2) commutator 4b be arranged in commutator 4b outer radial periphery around so that a pair of brush 11 that contacts with commutator 4b.In operation, when a pair of main contact (hereinafter will describe) of closed circuit,, make armature 4a rotation by contacting from battery 12 between brush 11 and the commutator 4b to armature 4a supply of current.
As shown in Figure 1, main switch 8 is fixed to the switch mounting portion 2b of shell 2 by two through bolts 17.
As shown in Figure 2, main switch 8 comprises: electromagnetic coil 15, plunger 16, a pair of fixed contact 18a of main contact that constitutes starter motor 1 circuit and 19a, pair of end bolt 18 and 19 and movable contact 20.
Fixed contact 18a is electrically connected to high pressure side (that is battery 12 sides) by terminal bolt 18.On the other hand, fixed contact 19a is electrically connected to low voltage side (that is motor 4 sides) by terminal bolt 19.
As shown in Figure 1, terminal bolt 18 and 19 the two be fixed to the Contact Cover 21 that covers fixed contact 18a and 19a and movable contact 20 of main switch 8.Terminal bolt 19 is electrically connected to the positive brush 11 of motor 4 by lead 22 (as shown in Figure 1).The electrical connection back of terminal bolt 18 will be introduced.
As shown in Figure 2, add electric terminal 23 and be electrically connected to battery 12 by cranking-motor relay 24.In operation, when cranking-motor relay 24 was connected by ECU 25, electric current was fed to from battery 12 and adds electric terminal 23, thereby electromagnetic coil 15 is powered up.Here, ECU 25 is the electronic control units (ECU, Electronic Control Unit) that are used to control power operation.
With reference now to Fig. 3,, auxiliary switch 10 comprises: cup-shaped housing 26, have longitudinal axis and be contained in cylindrical shape electromagnetic coil 27 in the housing 26, be arranged on the magnetic sheet 28 of electromagnetic coil 27 rear sides, when electromagnetic coil 27 powers up with the fixed iron core 29 that is magnetized, be arranged on fixed iron core 29 rear sides and make its movable core 30 towards auxiliary switch 10 axial (that is, electromagnetic coil 27 is axial), be arranged on the Contact Cover 31 that magnetic sheet 28 rear sides are made with the resin of enclosing housing 26 opening ends, be fixed to the pair of end bolt 32 and 33 on the Contact Cover 31, respectively with terminal bolt 32 and 33 integrally formed a pair of fixed contacts 45 and 46, with mobile so that be connected the movable contact 34 of (or bridge joint) and disconnection (or separately) fixed contact 45 and 46 with movable core 30.Should be noted that in Fig. 1 and Fig. 3, just introduce for convenience of explanation the front side to and rear direction.
The footpath that fixed iron core 29 is arranged on electromagnetic coil 27 is the week and the internal surface of the end wall of end surfaces housing 26 thereafter inwardly.
The sealed member of being realized by O shape ring 39 is arranged between Contact Cover 31 and the housing 26 to prevent entering Contact Cover 31 and housing 26 inboards as foreign objects such as water.
As shown in Figure 2, terminal bolt 32 is electrically connected to the negative pole of battery 12 by cable.Terminal bolt 32 is fixed to Contact Cover 31 by packing ring 41 and curling packing ring 43.On the other hand, terminal bolt 33 is electrically connected and is mechanically connected to the terminal bolt 18 of main switch 8 by metal connected element 40 (as shown in Figure 1).Terminal bolt 33 is fixed to Contact Cover 31 by packing ring 42 and curling packing ring 44.
Fixed contact 45 and 46 all is contained in the Contact Cover 31 and constitutes a pair of secondary contact of starter motor 1 circuit.
As previously mentioned, in the present embodiment, fixed contact 45 and 46 forms with terminal bolt 32 and 33 integral body respectively.Yet, should be understood that fixed contact 45 and 46 also can be respectively with terminal bolt 32 with opened formation in 33 minutes, take then to be connected respectively to together as the mode of soldering.
Active force by Returnning spring 38 promotes movable core 30 backward, and movable contact 34 is crushed on the contact receiving plane 31b that forms in the Contact Cover 31.In addition, around contact receiving plane 31b, be formed with circular groove, be provided with contact pressure spring 48 in it.When movable contact 34 will with fixed contact 45 when 46 contact, contact pressure spring 48 is exerted pressure so that movable contact 34 keeps in touch with fixed contact 45 and 46 to movable contact 34.
One end of bar 47 is embedded in the radial center portion of movable core 30 and the other end passes gap between fixed contact 45 and 46 in abutting connection with movable contact 34.
As shown in Figure 1, above-mentioned auxiliary switch 10 is arranged to the radially close main switch 8 along starter motor 1.Auxiliary switch 10 is fixed to shell 2 by support 49.
More specifically, support 49 has the first end portion 49a and the second end portion 49b.The first end portion 49a is plate-like basically, and its rear surface is attached to auxiliary switch 10 by the mode of for example welding.The second end portion 49b is formed with the through hole (not shown) of two circles thereon.The second end portion 49b is fixed between the switch mounting portion 2b and main switch 8 of shell 2 by two bolts 17 that pass these two manholes respectively.
In addition, as shown in Figure 4, the first end 9a of resistance 9 and the second end 9b are positioned at the position away from Contact Cover 31 inner radial surface intended distances.Also have, resistance 9 is configured to extend on perpendicular to the axial plane of auxiliary switch 10 and have at least two curved section 9c between the first end 9a and the second end 9b.
In addition, the thermal resistance of resistance 9 pre-determines, and when resistance 9 continued to power up, resistance 9 melted before Contact Cover 31 cause thermal damage, more specifically, reaches the preceding fusing of its softening temperature (for example, 260 ℃) in Contact Cover 31.
After the details of the general structure of describing starter motor 1 and auxiliary switch 10, the operation of starter motor 1 is described with reference now to Fig. 5.
At first, at moment t1, ECU 25 makes restriction electric current A1 flow to motor 4 from battery 12 for the electromagnetic coil 15 of main switch 8 powers up.Then, at moment t2 subsequently, ECU 25 makes total current A2 flow to motor 4 from battery 12 further for the electromagnetic coil 27 of auxiliary switch 10 powers up.
More specifically, at moment t1, ECU 25 connects cranking-motor relays 24, make electric current from battery 12 flow to main switch 8 electromagnetic coil 15 so that they power up.Electromagnetic coil 15 produces magnetic attraction to plunger 16 when powering up.Magnetic attraction attracts plunger 16 to move to Fig. 2 left, thereby movable contact 20 is linked to each other and driving lever 7 is dialled small gear 6 to the right with 19a with fixed contact 18a.
After main contact (that is, fixed contact 18a and the 19a) closure of circuit, the restriction electric current A1 that is limited by resistance 9 flows to motor 4 from battery 12.Thereby motor 4 low speed rotation are convenient to form between small gear 6 and the engine ring gear 5 engagement.
After forming engagement between small gear 6 and the gear ring 5, at moment t2, ECU 25 powers up for the electromagnetic coil 27 of auxiliary switch 10.After powering up, electromagnetic coil 27 constitutes electromagnet with fixed iron core 29.Electromagnet attract movable core 30 with movable contact 34 to the front side of Fig. 3 to moving, movable contact 34 is linked to each other with 46 with fixed contact 45.
After secondary contact (that is, the fixed contact 45 and 46) closure of circuit, resistance 9 is by bypass or short circuit, thereby total current A2 flows to motor 4 from battery 12.Thereby, motor 4 high speed rotating, the moment that motor 4 produces is sent to motor by the engagement between small gear 6 and the gear ring 5, thereby pilots engine.
In case engine start, at moment t3, ECU 25 makes electromagnetic coil 27 outages of the electromagnetic coil 15 and the auxiliary switch 10 of main switch 8.Thereby the plunger 16 of main switch 8 turns back to its initial position by the active force of Returnning spring (not shown), thereby disconnects be connected (that is the main contact of circuit is opened circuit) between movable contact 20 and fixed contact 18a and the 19a.Simultaneously, the movable contact 34 of auxiliary switch 10 turns back to its initial position by the active force of Returnning spring 38, thereby disconnects be connected (that is the secondary contact of circuit is opened circuit) between movable contact 34 and fixed contact 45 and 46.Thereby 4 power supply is interrupted from battery 12 to motor, and motor 4 is stopped.
According to present embodiment, will realize following advantage.
In the present embodiment, from as shown in Figure 5 moment t1 in the initial time section t of t2, only to motor 4 supply restriction electric current A1.Thereby motor 4 powers up and low speed rotation, forms the mechanical shock that takes place in the process of engagement between the gear ring 5 of small gear 6 and motor thereby alleviate.Thereby, alleviated the wearing and tearing of small gear 6 with gear ring 5, improved their durability thus.
In addition, by resistance 9, the electric current of surging that flows to motor 4 from battery 12 when motor 4 begins to rotate reduces.Thereby the service life of the brush 11 of fixed contact 18a, the 19a of main switch 8 and movable contact 20 and motor 4 etc. can obtain prolonging.
In the present embodiment, resistance 9 is contained in Contact Cover 31 interior and axially being inserted between magnetic sheet 28 and fixed contact 45 and 46 along auxiliary switch 10 of auxiliary switch 10.
Because resistance 9 is not arranged on the outer radial periphery of electromagnetic coil 27, so the external diameter of auxiliary switch 10 is reduced with respect to the disclosed magnetic switch of Japan Patent No.3767550.
In addition, in the present embodiment, the housing 26 of auxiliary switch 10 is configured to have small diameter portion 26a and major diameter part 26b.Electromagnetic coil 27 is contained in the small diameter portion 26a, and resistance 9 is contained in the Contact Cover 31 that is coupled among the major diameter part 26b.
By above-mentioned structure, the external diameter of small diameter portion 26a is minimized, thereby make auxiliary switch 10 become compact.
In addition, thereby, encroached on by exterior materials such as water, thereby improved the durability of resistance 9 so can prevent resistance 9 because resistance 9 is contained in the outsides that are not exposed to auxiliary switch 10 in the Contact Cover 31.And, owing to there is not the combustible gas physical efficiency to arrive resistance 9, so can guarantee the Security of auxiliary switch 10 when after resistance 9 powers up for a long time, becoming red-hot.
In addition, because resistance 9 is positioned at the position away from electromagnetic coil 27, do not produce scattering and disappearing of heat so can not influence electromagnetic coil 27.Moreover by being inserted in the magnetic sheet 28 between electromagnetic coil 27 and the resistance 9, electromagnetic coil 27 is arrived in the heat transport that can stop resistance 9 to produce, thereby guarantees the heat resistance and the field performance of electromagnetic coil 27.
In the present embodiment, the movable contact 34 of auxiliary switch 10 with respect to fixed contact 45 and 46 further from magnetic sheet 28.In other words, movable contact 34 does not have axially being inserted between magnetic sheet 28 and fixed contact 45 and 46 along auxiliary switch 10.Thereby, the risk that does not have movable contact 34 to contact with resistance 9, thus the reliability of auxiliary switch 10 improved.
In the present embodiment, the first end 9a of resistance 9 is electrically connected and is mechanically connected to terminal bolt 32 and its second end 9b is electrically connected and is mechanically connected to terminal bolt 33.In addition, terminal bolt 32 and 33 is formed with fixed contact 45 and 46 respectively thereon.Thereby the heat transport that can easily resistance 9 be produced is to fixed contact 45 and 46.Thereby even the temperature of terminal bolt 32 and 33 is reduced by cool exterior air, the conductivity that still may prevent fixed contact 45 and 46 is owing to for example dewfall and freezing decline.
In the present embodiment, resistance 9 is positioned at the position away from magnetic sheet 28 and fixed contact 45 and 46 intended distances.In addition, as shown in Figure 4, the first end 9a of resistance 9 and the second end 9b are positioned at the position away from Contact Cover 31 inner radial surface intended distances.Thereby the heat that resistance 9 produces is difficult to damage Contact Cover 31.
In addition, in the present embodiment, the thermal resistance of resistance 9 pre-determines, and resistance 9 was melted before the Contact Cover 31 that resin is made reaches its softening temperature.
When movable contact 34 and fixed contact 45 when 46 can not normally be connected, thereby resistance 9 will continue to power up and become red-hot.Yet by above-mentioned structure, resistance 9 will melt before Contact Cover 31 cause thermal damage.Thereby, the reliability and the Security that can improve auxiliary switch 10.
In the present embodiment, resistance 9 is configured to extend and have at least two curved section 9c between the first end 9a and the second end 9b on the plane axial perpendicular to auxiliary switch 10.
Adopt above-mentioned structure, length that can be by adjusting resistance 9 is set at expected value with the resistance value of resistance 9.In addition, be attached in the process of terminal bolt 32 and 33 at the first end 9a and the second end 9b with resistance 9, as shown in Figure 4, can easily crooked resistance 9 so that the distance between the first end 9a and the second end 9b reaches desired distance L.
[second mode of execution]
Present embodiment has been described the method that resistance 9 is attached to terminal bolt 32 and 33.
With reference to figure 6, in the present embodiment, terminal bolt 32 has the hole 32a of a predetermined depth on its front-end face.Terminal bolt 32 also has two groove 32b, and described groove 32b is formed on the side surface of terminal bolt 32 and radially opposed mutually along terminal bolt 32, and 32a is clipped in therebetween with the hole.Similarly, terminal bolt 33 has the hole 33a of a predetermined depth on its front-end face.Terminal bolt 33 also has two groove 33b, and described groove 33b is formed on the side surface of terminal bolt 33 and radially opposed mutually along terminal bolt 33, and 33a is clipped in therebetween with the hole.Should be noted that in Fig. 6, just introduce for convenience of explanation the front side to and rear direction.
The hole 32a of the first end 9a insertion end bolt 32 of resistance 9.In addition, by radially inwardly the bottom of extrusion-deformation groove 32b terminal bolt 32 is pressed the first end 9a of pleats to resistance 9.On the other hand, the hole 33a of the second end 9b insertion end bolt 33 of resistance 9.In addition, by radially inwardly the bottom of extrusion-deformation groove 33b terminal bolt 33 is pressed the second end 9b of pleats to resistance 9.
Employing is according to the above-mentioned associated methods of present embodiment, and the first end 9a and the second end 9b of resistance 9 can be firmly bonded to terminal bolt 32 and 33, and need not to make when picture adopts the situation of furnace brazing whole resistance 9 and terminal bolt 32 and 33 heating.
Thereby, can prevent that the intensity of terminal bolt 32 and 33 from reducing in cohesive process.Thus, can securely cable terminal be fastened on terminal bolt 32 and 33 and not damage terminal bolt 32 and 33.
And, adopt above-mentioned associated methods, in pressing the pleat process, only a part of terminal bolt around the groove 32b 32 and only a part of terminal bolt 33 around the groove 33b be extruded distortion.Thereby, can reduce the bending deflection of whole terminal bolt 32 and 33.
In addition, also can take following method for welding that resistance 9 is attached to terminal bolt 32 and 33.
At first, fill solder cream among terminal bolt 32 and 33 hole 32a and the 33a.Then, the first end 9a of resistance 9 and the second end 9b distinguish among the hole 32a and 33a of insertion end bolt 32 and 33.After this, only a part of terminal bolt around the 32a of hole 32 and only a part of terminal bolt 33 around the 33a of hole be heated removing melting solder cream, thereby the first end 9a and the second end 9b of resistance 9 is attached to terminal bolt 32 and 33 respectively.
Adopt above-mentioned method for welding, also can realize the advantage that realizes according to the associated methods of present embodiment.
[the 3rd mode of execution]
Present embodiment has been described the another kind of method that resistance 9 is attached to terminal bolt 32 and 33.
With reference to figure 7, in the present embodiment, terminal bolt 32 has excrescence 32c, and described excrescence 32c is outstanding and from the outstanding predetermined altitude of front-end face from the front-end face of terminal bolt 32.In addition, as shown in Figure 8, thereby excrescence 32c has rectangular base and be tapered towards its top and have trapezoidal cross-section.Similarly, terminal bolt 33 has excrescence 33c, and described excrescence 33c is outstanding and from the outstanding predetermined altitude of front-end face from the front-end face of terminal bolt 33.In addition, as shown in Figure 8, thereby excrescence 33c has rectangular base and be tapered towards its top and have trapezoidal cross-section.
The first end 9a and the second end 9b of resistance 9 are separately positioned on the excrescence 32c of terminal bolt 32 and 33 and the top of 33c, and adopt projection welding to be attached to the top of excrescence 32c and 33c respectively.
In addition, as shown in Figure 8, the length of terminal bolt 32 and 33 excrescence 32c and 33c is significantly greater than the diameter (for example, three times) of resistance 9.And as shown in Figure 7, the projecting height of terminal bolt 32 and 33 excrescence 32c and 33c pre-determines to making resistance 9 become almost same distance apart from magnetic sheet 28 and first fixed contact 45 and second fixed contact 46 along the axially locating of auxiliary switch 10.
Employing is according to the above-mentioned associated methods of present embodiment, and the first end 9a and the second end 9b of resistance 9 can be firmly bonded to terminal bolt 32 and 33, and need not to heat when picture adopts the situation of furnace brazing whole resistance 9 and terminal bolt 32 and 33.
Thereby, can prevent that the intensity of terminal bolt 32 and 33 from reducing in cohesive process.Thus, can securely cable terminal be fastened on terminal bolt 32 and 33 and not damage terminal bolt 32 and 33.
In addition, because the length of the excrescence 32c of terminal bolt 32 and 33 and 33c breaks away from excrescence 32c and 33c significantly greater than the diameter of resistance 9 so can prevent the first end 9a of resistance 9 and the second end 9b reliably in projection welding process.And, the distance between the first end 9a and the second end 9b accurately can also be set to desired distance L.
Though illustrated and described above-mentioned specific implementations of the present invention, it will be appreciated by those skilled in the art that and to make various remodeling, change and improvement in the case of without departing from the spirit of the present invention.
For example, in the first embodiment, auxiliary switch 10 is fixed to the shell 2 of starter motor 1 by support 49.
But, when being difficult to that auxiliary switch 10 is installed into engine compartment with starter motor 1, can make auxiliary switch 10 and starter motor 1 positioned apart and be free of attachment to shell 2.
In addition, in aforementioned embodiments, the present invention is applied to start the auxiliary switch 10 that adopts in the starter motor 1 of explosive motor.
Yet the present invention also can be applicable to be connected to circuit in two stage control flows other any magnetic switch through the electric current of circuit.
Claims (11)
1. magnetic switch comprises:
Electromagnetic coil, it has longitudinal axis;
Fixed iron core, its by described electromagnetic coil around;
The magnetic sheet of annular, it is along a side that is axially disposed within described electromagnetic coil of described electromagnetic coil, and described magnetic sheet has the through hole that runs through its radial center formation;
Movable core, its can along the through hole that axially passes described magnetic sheet of described electromagnetic coil towards with move away from described fixed iron core;
The Contact Cover that resin is made, it is arranged to axially described magnetic sheet is clipped between described Contact Cover and the described electromagnetic coil along described electromagnetic coil;
The first terminal and second terminal, it is fixed to described Contact Cover and outwards outstanding so that be connected to circuit from described Contact Cover;
First fixed contact and second fixed contact, it is contained in the described Contact Cover and is electrically connected to the described the first terminal and second terminal respectively;
Movable contact, it is contained in the described Contact Cover and is configured to and moves so that be electrically connected and the electricity disconnection with described first fixed contact and second fixed contact with described movable core; With
Resistance, it is connected electrically between the described the first terminal and second terminal with flow through when described first fixed contact and second fixed contact electricity disconnect electric current of described circuit of restriction, and described resistance is contained in interior and axially being inserted between described magnetic sheet and described first fixed contact and second fixed contact along described electromagnetic coil of described Contact Cover.
2. magnetic switch according to claim 1, wherein said resistance have first end and second end, and described first end and second end are attached to described the first terminal and second terminal respectively and are positioned to inner radial surface intended distance away from described Contact Cover.
3. magnetic switch according to claim 1, wherein said resistance have first end and second end, and described first end and second end are attached to the described the first terminal and second terminal respectively, and
Described resistance extends between described first end and second end on perpendicular to the axial plane of described electromagnetic coil and has at least two curved sections.
4. magnetic switch according to claim 1, the thermal resistance of wherein said resistance pre-determines: when described resistance continues to power up, described resistance melting before described Contact Cover reaches its softening temperature.
5. magnetic switch according to claim 1, in the wherein said the first terminal and second terminal each is shaped to the bolt with hole and two grooves, described hole is opened on the axial end of described bolt and is had predetermined depth, described two grooves are formed on the side surface of described bolt and along the radially opposed mutually of described bolt described hole are clipped in therebetween, and
Described resistance has first end and second end, described first end insert in the hole of described the first terminal and by radially inwardly the bottom of the groove of the described the first terminal of extrusion-deformation be attached to described the first terminal, described second end insert in the hole of described second terminal and by radially inwardly the bottom of the groove of described second terminal of extrusion-deformation be attached to described second terminal.
6. magnetic switch according to claim 1, each in the wherein said the first terminal and second terminal is shaped to bolt, and described bolt has out on the axial end of described bolt and the hole with predetermined depth,
Be provided with solder in the hole of the described the first terminal and second terminal, and
Described resistance has first end and second end, thereby the solder that described first end inserts in the hole of described the first terminal and melt in the described hole by a part of the first terminal that only heats around the described hole is attached to described the first terminal, thereby described second end inserts in the hole of described second terminal and the solder that melts in the described hole by a part second terminal that only heats around the described hole is attached to described second terminal.
7. magnetic switch according to claim 1, each in the wherein said the first terminal and second terminal is shaped to bolt, and described bolt has from the excrescence of the outstanding intended distance of axial end of described bolt, and
Described resistance has first end and second end, and described first end and second end are welded to the described excrescence of the described the first terminal and second terminal respectively.
8. magnetic switch according to claim 1, the circuit that the wherein said the first terminal and second terminal will be connected to are the circuit that is used for to starter motor supply electric power.
9. magnetic switch according to claim 1, also comprise cup-shaped housing with first portion and second portion, described first portion comprises the closed end of described housing and described electromagnetic coil is held within it, described second portion comprises the opening end of described housing and the end of described Contact Cover is cooperated within it that described first portion has the external diameter littler than described second portion.
10. magnetic switch according to claim 1, wherein said movable contact be positioned to along described electromagnetic coil axially than described first fixed contact and second fixed contact further from described magnetic sheet.
11. magnetic switch according to claim 1, each in the wherein said the first terminal and second terminal is shaped to bolt, and described first fixed contact and second fixed contact are respectively with described the first terminal with second terminal is whole forms.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008039233 | 2008-02-20 | ||
| JP2008039233 | 2008-02-20 | ||
| JP2008-039233 | 2008-02-20 | ||
| JP2008325261A JP5168128B2 (en) | 2008-02-20 | 2008-12-22 | Electromagnetic switch |
| JP2008325261 | 2008-12-22 | ||
| JP2008-325261 | 2008-12-22 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101514665A true CN101514665A (en) | 2009-08-26 |
| CN101514665B CN101514665B (en) | 2010-12-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100056839A Active CN101514665B (en) | 2008-02-20 | 2009-02-19 | Starter solenoid switch with improved arrangement of resistor |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP4591627B2 (en) |
| CN (1) | CN101514665B (en) |
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Also Published As
| Publication number | Publication date |
|---|---|
| JP2010225596A (en) | 2010-10-07 |
| JP4591627B2 (en) | 2010-12-01 |
| CN101514665B (en) | 2010-12-08 |
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