CN203055799U - Vehicle starter and electromagnetic switch thereof - Google Patents
Vehicle starter and electromagnetic switch thereof Download PDFInfo
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- CN203055799U CN203055799U CN 201220659502 CN201220659502U CN203055799U CN 203055799 U CN203055799 U CN 203055799U CN 201220659502 CN201220659502 CN 201220659502 CN 201220659502 U CN201220659502 U CN 201220659502U CN 203055799 U CN203055799 U CN 203055799U
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- against sleeve
- connecting rod
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Abstract
The utility model relates to a vehicle starter and an electromagnetic switch thereof. The electromagnetic switch disclosed by the utility model comprises a pushing and pressing sleeve device slidably penetrating through a fixed iron core. The pushing and pressing sleeve device is provided with a first end close to a wiring terminal and a second end opposite to the first end. A contact bridge is slidably mounted on the first end. The pushing and pressing sleeve device is arranged in the following manner that: when the electromagnetic switch is powered on, the pushing and pressing sleeve device moves towards the wiring terminal to drive the contact bridge to contact with the wiring terminal and the first end of the pushing and pressing sleeve device is disengaged from the contact bridge for a certain distance; and when the electromagnetic switch is powered off, the first end of the pushing and pressing sleeve device bumps onto the contact bridge in the process that the pushing and pressing sleeve device moves away from the wiring terminal under the effect of a first reset spring. The electromagnetic switch provided by the utility model is capable of rapidly disconnecting the contact bridge from the wiring terminal after an engine is started. The vehicle starter based on the utility model comprises a direct-current motor, a transmission mechanism and the aforementioned electromagnetic switch.
Description
Technical field
The utility model relates to a kind of electromagnetic switch of using in vehicle starter, and relates to the vehicle starter that comprises this electromagnetic switch.
Background technology
Starter uses in vehicle, is used for starting the engine of vehicle.Starter generally comprises DC motor, transmission mechanism and controlling organization.The controlling organization of normally used starter is electromagnetic switch, and it is easy to use, dependable performance.
Fig. 1 illustrates a kind of structural representation of electromagnetic switch of starter.As shown in Figure 1, this electromagnetic switch mainly comprises: housing 2; By two binding posts 10 that are fixed on cap 8 carryings on the housing 2; Hard-wired fixed iron core 4 and solenoid 6; Can move axially and be installed in the push rod 12 in the fixed iron core 4; Be installed in the contact bridge 14 of push rod 12 front ends; Can axially movable moving core 16; And the pull bar 18 of fixedlying connected with moving core 16.
When ignition switch was activated, solenoid 6 was powered, and acted on the electromagnetic force of moving core 16 with generation.Moving core 16 drives pull bar 18 and moves towards fixed iron core 4.The left part of pull bar 18 is by the transmission mechanism of shift fork (not shown) pulling starter, so that the direction of the gear ring of the driven wheel that the DC motor of starter drives on engine flywheel moves.Pull bar 18 to the right (towards the direction of binding post 10) move to touch push rod 12 after, the right part of pull bar 18 will promote the left part of push rod 12, and then promote contact bridge 14 and move to contact two binding posts 10, finally connect the main circuit of DC motor.At this moment, the driven wheel that drives of DC motor and the gear ring on the engine flywheel mesh.Correspondingly, rotatablely moving of DC motor is passed to the flywheel of engine, drives the crankshaft rotating of engine, thus the engine of starting vehicle.
After engine start, ignition switch is released, and the electromagnetic force that solenoid 6 acts on moving core 16 disappears.Moving core 16 together with pull bar 18 under the effect of back-moving spring left (away from the direction of binding post 10) mobile, and by shift fork the driven wheel pulling is separated from gear ring on the engine flywheel.Simultaneously, under the effect of the back-moving spring in being arranged at lid 8, push rod 12 also is moved to the left, and drive contact bridge 14 is separated from two binding posts 10.In this way, the main circuit of DC motor is disconnected, and DC motor shuts down.
In the starting process of engine, very high electric current (for example peak current can reach 1500-2500A) will flow through contact bridge 14 and binding post 10.After engine is realized starting, if can not be rapidly contact bridge 14 be disconnected and connecting (for example because contact bridge 14 and binding post 10 are welding in together) from binding post 10, above-mentioned very high electric current will make the DC motor of starter have the danger of being burnt.
And in the starting process of engine, the contact part between contact bridge 14 and the binding post 10 all can come in contact weldering under many circumstances.When the contact part between contact bridge 14 and the binding post 10 comes in contact weldering, only rely on the effect that is arranged at the back-moving spring in the lid 8, will be difficult to contact bridge 14 is left from binding post 10 punishment.
Therefore, very expectation can provide a kind of electromagnetic switch of starter, and it can disconnect contact bridge after the starting of engine rapidly from binding post punishment.
The utility model content
An aspect of the present utility model provides a kind of electromagnetic switch for vehicle starter, and it can prevent the generation of above-mentioned phenomenon.
According to an aspect of the present utility model, the utility model discloses a kind of electromagnetic switch for vehicle starter, comprising: fixed iron core; Be positioned at fixed iron core left side and can towards with the moving core that moves away from fixed iron core; Solenoid is for generation of the electromagnetic force that moves towards fixed iron core unshakable in one's determination that innervates; Be located at a pairs of posts at the place, right side of fixed iron core; It is characterized in that electromagnetic switch also is provided with: pass the pushes against sleeve device of fixed iron core slidably, it has first end of close binding post and second end opposite with first end, on its first end contact bridge is installed slidably; And first back-moving spring, it applies active force in the pushes against sleeve device along the direction away from binding post; The pushes against sleeve device is set up as follows: after the electromagnetic switch energising, the pushes against sleeve device moves towards the binding post direction, touch binding post to drive contact bridge, and first end of pushes against sleeve device is separated from contact bridge one segment distance; After electromagnetic switch outage, the direction away from binding post moves in the effect lower edge of first back-moving spring along with the pushes against sleeve device, and first end of pushes against sleeve device collides contact bridge.
Preferably, described pushes against sleeve device comprises outer pushes against sleeve tube and the interior pushing member that is slidably disposed on outer pushes against sleeve tube inboard; The interior member that pushes is provided with projection radially outward at the end place near binding post, and it is separated from contact bridge one segment distance after the electromagnetic switch energising, and clashes into contact bridge after the electromagnetic switch outage.
Preferably, described first back-moving spring is resisted against between second end and fixed iron core of outside projection of pushes against sleeve device, and arranges around the pushes against sleeve device.
Preferably, outer pushes against sleeve tube and interior pushing member are provided with the projection radially outward that can abut against mutually respectively at the end place away from binding post.
Preferably, described interior pushing member is interior pushes against sleeve; Described electromagnetic switch also is provided with the connecting rod that runs through interior pushes against sleeve and can slide therein, connecting rod comprises radial outside and first end of close binding post and the second opposite end that can project into interior pushes against sleeve, and be configured to along with moving core moves away from fixed iron core an end of the close binding post of pushes against sleeve in first end of connecting rod collides.
Preferably, second end of connecting rod is arranged in the through hole of moving core, and first end and second end of connecting rod have projection radially outward respectively, and the inwall of the through hole of moving core is formed with radially inwardly projection; Described connecting rod is set up as follows: in the process that moving core moves away from fixed iron core, the radially inside projection of moving core collides the projection radially outward of second end of connecting rod, and/or the projection radially outward of first end of connecting rod collides an end of the close binding post of interior pushes against sleeve.
Preferably, cylindrical member is arranged fixedly in the through hole of moving core, the bottom, right side of cylindrical member has through hole; Thereby the size of first end of connecting rod can run through through hole by cylindrical member less than the size of the through hole of cylindrical member, and the size of second end of connecting rod is greater than the size of the through hole of cylindrical member.
Preferably, be equipped with second back-moving spring in the through hole of moving core, it abuts against the right-hand end of moving core and second end of pushes against sleeve device respectively.
Preferably, described electromagnetic switch comprises control circuit, and described control circuit is provided with the discharge device that is connected in parallel with solenoid; Described discharge device is access in the control circuit of electromagnetic switch as follows: when electromagnetic switch was switched on, described discharge device was in off state; When electromagnetic switch was cut off the power supply, described discharge device was in conducting state, to form closed circuit with solenoid.
Preferably, solenoid comprises hold-in winding and engagement coil, and both winding directions are opposite, and the number of ampere turns of hold-in winding is much larger than the number of ampere turns of engagement coil; Described discharge device is in parallel with hold-in winding and is connected.
Preferably, described discharge device is that diode, triode or other have unidirectional conducting oppositely by power tube or the switch electronic device of function.
In addition, the invention also discloses a kind of vehicle starter, comprising: DC motor; The transmission mechanism that links to each other with the output shaft of motor; And foregoing electromagnetic switch, it controls the operation of described DC motor and transmission mechanism.
As useful technique effect of the present utility model, contact bridge can disconnect from binding post punishment rapidly after the starting of engine, thereby avoids the DC motor of starter to be burnt.
Description of drawings
In the accompanying drawings:
Fig. 1 is a kind of structural representation of the existing electromagnetic switch for vehicle starter.
Fig. 2 is the structural representation according to the electromagnetic switch of the vehicle starter of the utility model preferred implementation.
Fig. 2 a is the structural representation of the outer pushes against sleeve tube of pushes against sleeve device shown in Figure 2.
Fig. 2 b is the structural representation of the interior pushing member of pushes against sleeve device shown in Figure 2.
Fig. 2 c is mounted in the structural representation of the connecting rod in the pushes against sleeve device.
Fig. 3 is the circuit diagram according to starter of the present utility model.
Fig. 4 a shown in ignition switch be activated, contact bridge 14 touches the state after the binding post 8.
Fig. 4 b has shown the state after ignition switch is released, when interior pushes against sleeve 12b collides contact bridge 14.
Embodiment
Below with reference to accompanying drawing embodiment of the present utility model is described in further detail.In each accompanying drawing, identical Reference numeral is used for representing same or analogous parts.Unless describe especially, " to the right " or " forward " refers to towards the direction of fixed iron core and binding post or a side, and " left " or " backward " refers to deviate from direction or a side of fixed iron core and binding post.
Fig. 2 is according to the utility model, is used for the structural representation of the electromagnetic switch of vehicle starter, and the electromagnetic switch shown in it is in non-operating state.
As shown in Figure 2, comprise according to electromagnetic switch of the present utility model: housing 2, moving core 16, be fixedly attached to pull bar 10 and cylindrical member 18 on the moving core 16, lid 20, be fixedly attached to two binding posts 8 on the lid 20, be fixed to the fixed iron core 4 on the housing 2, can be installed in the connecting rod 22 in the fixed iron core 4 with moving axially, install and extend to pushes against sleeve device 12 in the fixed iron core 4 around connecting rod 22 peripheries, be arranged on the mount pad 28 in the right side recess of fixed iron core 4, utilize mount pad 28 to be clamped in the contact bridge 14 of connecting rod 22 rear end, and for the first back-moving spring 24a that contact bridge 14 and moving core 16 are resetted, the 3rd back-moving spring 24b, the second back-moving spring 24c.
Specify structure according to electromagnetic switch of the present utility model below with reference to accompanying drawing 2.Body part according to electromagnetic switch of the present utility model comprises housing 2 and the cap 20 that is installed on the housing 2, and wherein two binding posts 8 are fixedly installed on the cap 20.Fixed iron core 4 and solenoid 6 are fixedly secured in the housing 2.Under the electromagnetic force effect of solenoid 6, moving core 16 can move forward and backward in electromagnetic switch.
As shown in Figure 2, fixed iron core 4 is installed in the rear portion of the housing 2 of electromagnetic switch, and is preferably integrally formed single-piece.Fixed iron core 4 comprises the large-diameter portion branch that is fixed in the housing 2, divides rearwardly projecting path part and be also referred to as leftmost side part from the rearwardly projecting roughly truncated cone shape of path part overhang 4a(from large-diameter portion).Fixed iron core 4 has the rearward end 4b that is positioned at its right side, and is formed with recess in the rearward end 4b of fixed iron core 4.In fixed iron core 4, also be formed with the guide through hole 4c that connects along the fore-and-aft direction of electromagnetic switch.
Pushes against sleeve device 12 is installed in the guide through hole 4c of fixed iron core 4 slidably.Pushes against sleeve device 12 comprises short outer pushes against sleeve tube 12a and is slidably mounted in the interior long interior pushing member 12b of outer pushes against sleeve tube 12a, respectively shown in Fig. 2 a, 2b.Preferably, interior pushing member 12b is an interior pushes against sleeve.Outer pushes against sleeve tube 12a has through hole 12a1 and left part 12a2.The left part of outer pushes against sleeve tube 12a also is provided with projection 12a3 radially outward.But the left end of outer pushes against sleeve tube 12a does not arrange projection 12a3 radially outward alternatively.
Interior pushes against sleeve 12b comprises interior pushes against sleeve main body 12b1, is positioned at the 12b2 of projection radially outward and the through hole 12b3 in pushes against sleeve main body 12b1 left side.Interior pushes against sleeve 12b can be inserted into the line slip of going forward side by side in the through hole 12a1 of outer pushes against sleeve tube 12a, so that the 12b2 of projection radially outward of interior pushes against sleeve 12b contact and abut against the left part 12a2 of outer pushes against sleeve tube 12a.
At the outer pushes against sleeve tube 12a that left side and the pushes against sleeve device 12(of mount pad 28 particularly are pushes against sleeve device 12) the right side between be provided with the first back-moving spring 24a.The described first back-moving spring 24a is arranged in the guide through hole 4c of fixed iron core 4 simultaneously.Pushes against sleeve 12a does not have under the situation of projection 12a3 radially outward outside, the 12b2 of projection radially outward of pushes against sleeve 12b and the overhang 4a of fixed iron core 4 in the first back-moving spring 24a will directly abut against.
The 3rd back-moving spring 24b particularly is the outer pushes against sleeve tube 12a of pushes against sleeve device 12 around pushes against sleeve device 12() outer peripheral portion install, and abut against the 12a3 of projection radially outward of outer pushes against sleeve tube 12a and the overhang 4a of fixed iron core 4.
Moving core 16 is can axially movable mode to be arranged in the roughly rear portion of housing 2.This moving core 16 is roughly cylindrical, and its inside is formed with successively from the back to preceding that path is installed through hole 16a, diameter is installed the ccontaining through hole 16b in big footpath of through hole 16a and the general conical recessed portion 16c that shape matches with the overhang 4a of fixed iron core 4 greater than path.Under the electromagnetic force effect of solenoid 6, moving core 16 moves to the right, so that the recessed portion 16c of moving core 16 matches with the overhang 4a of fixed iron core 4.
At the path of moving core 16 through hole 16a place is installed and is provided with elongated cylindrical member 18 regularly.Simultaneously, in the ccontaining through hole 16b in the big footpath of moving core 16, be provided with the second bigger back-moving spring 24c of spring constant.Two ends of the second back-moving spring 24c are contacting path respectively through hole 16a and the big directly interface between the ccontaining through hole 16b and the left part of pushes against sleeve device 12 are being installed.Optionally, cylindrical member 18 can be towards the certain size of right side projection, so that the second back-moving spring 24c is round the peripheral part of cylindrical member 18.As shown in Figure 2, cylindrical member 18 has bottom, right side 18a, and it is provided with through hole.
Shown in Fig. 2 c, comprise the connecting rod 22 that can in pushes against sleeve device 12, slide according to electromagnetic switch of the present utility model.Connecting rod 22 comprises the second end 22a, con-rod only 22c and is positioned at the first end 22b of the second end opposition side.The second end 22a of connecting rod 22 has outwards outstanding big footpath projection 22a1.The size of the big footpath projection 22a1 of the second end 22a of connecting rod 22 is greater than the size of the through hole of bottom, the right side 18a of cylindrical member 18, thereby the second end 22a of connecting rod 22 can't pass the through hole of bottom, the right side 18a of cylindrical member 18.But the con-rod only 22c of connecting rod 22 and the size of first end 22b are less than the size of the through hole of bottom, the right side 18a of cylindrical member 18, thereby the through hole that can pass bottom, the right side 18a of cylindrical member 18 is inserted in the interior pushes against sleeve 12b.
As shown in Figure 2, connecting rod 22 not only runs through by fixed iron core 4 and pushes against sleeve device 12, but also runs through the outside that extends to mount pad 28 and contact bridge 14.
The right part of mount pad 28 is equipped with contact bridge 14.Mount pad 28 and contact bridge 14 are subjected to the pushing force forward that the first back-moving spring 24a applies.When assembling electromagnetic switch of the present utility model, the first end 22b of connecting rod 22 passes the through hole of bottom, the right side 18a of cylindrical member 18 from the left side of moving core 16, connect and pass pushes against sleeve device 12, comes out from mount pad 28, contact bridge 14 projections.Then, on the right side of the first end 22b of connecting rod 22 metallic gasket and insulation spacer are set.
After the pad projection on mount pad 28, contact bridge 14 and right side thereof is come out, form radially outward projection at the first end 22b place of connecting rod 22 at the first end 22b of connecting rod 22, can prevent that like this connecting rod 22 breaks away from from pushes against sleeve device 12.Described projection radially outward for example can be the collar, the clamp nut that are fixedly attached to the first end 22b place of connecting rod 22, run through pin.Described projection radially outward can be that first end 22b is carried out the flat head of modification that the spinning operation forms afterwards, also can be at the first end 22b place of connecting rod 22 weld metal piece to form described projection radially outward.
Similarly, when assembling electromagnetic switch of the present utility model, pushes against sleeve device 12 reaches in the fixed iron core 4, and the right part of interior pushes against sleeve 12b (first end) projects into the outside of mount pad 28, contact bridge 14.Right part at interior pushes against sleeve 12b also forms similarly projection radially outward.Described projection radially outward for example can be the right part place of pushes against sleeve 12b in being connected to collar, clamp nut, run through pin etc., also can be the outer flanging that the place, right part of pushes against sleeve 12b forms in operating in by flange, shown in Fig. 2 b.
Assembling process according to electromagnetic switch of the present utility model below will be described.At first, earlier solenoid 6 and fixed iron core 4 are installed in the housing 2; Then, with pushes against sleeve device 12, together with the first back-moving spring 24a and the 3rd back-moving spring 24b of installation in position, insert from the left side in the guide through hole 4c of fixed iron core 4, stretch out fixed iron core 4 until the interior pushes against sleeve 12b of pushes against sleeve device 12; Secondly, mount pad 28 and contact bridge 14 are installed in the right part of the interior pushes against sleeve 12b of pushes against sleeve device 12; Place the second back-moving spring 24c in the right side of moving core 16 and the left side of pushes against sleeve device 12, make connecting rod 22 pass moving core 16 and cylindrical member 18; Connecting rod 22 and moving core 16 left side from electromagnetic switch is placed in the electromagnetic switch, and promotes moving core 16, and the first end 22b of connecting rod 22 stretches out mount pad 28 and contact bridge 14; Promote moving core 16 and cylindrical member 18 to the right, simultaneously promote mount pad 28 and contact bridge 14 left, so that first, second, third back-moving spring 24a, 24c, 24b are in predetermined impaction state; At last, make the right part of interior pushes against sleeve 12b and the first end 22b of connecting rod 22 form radially projection respectively.
Below introduce the operating process according to electromagnetic switch of the present utility model.Fig. 4 a shown in ignition switch be activated, contact bridge 14 touches the state after the binding post 8.Fig. 4 b has shown the state after ignition switch is released, when interior pushes against sleeve 12b collides contact bridge 14.
Before ignition switch was activated, electromagnetic switch was in state shown in Figure 2 when being in off-position (be electromagnetic switch).When solenoid 6 is powered, produced the electromagnetic force that acts on moving core 16.Under the effect of electromagnetic force, moving core 16 drive cylindrical member 18 towards fixed iron core 4(namely towards the right side of Fig. 2) mobile, further pushing the second back-moving spring 24c simultaneously.The second back-moving spring 24c after being squeezed acts on pushes against sleeve device 12.Pushes against sleeve device 12 moves towards fixed iron core 4 in stressed back, and is pushing the first back-moving spring 24a, the 3rd back-moving spring 24b.The first back-moving spring 24a after being squeezed acts on mount pad 28 and contact bridge 14, makes mount pad 28 and contact bridge 14 move along the direction towards binding post 8.
At contact bridge 14 in the process that the direction of binding post 8 moves, the rear end of the pull bar 10 of fixedlying connected with moving core 16 (being positioned at the left side of Fig. 2) is by the transmission mechanism of shift fork (not shown) pulling starter, so that the gear ring of driven wheel on engine flywheel moves.
After contact bridge 14 begins to touch two binding posts 8, moving core 16 continues mobile, abuts against the left end (particularly being the left end of the interior pushes against sleeve 12b of pushes against sleeve device 12) of pushes against sleeve device 12 until bottom, the right side 18a of the cylindrical member 18 of moving core 16.The first end 22b of the right radial projection drivening rod 22 of interior pushes against sleeve 12b is separated from mount pad 28, contact disc 14, shown in Fig. 4 a.Like this, between contact bridge 14 and binding post 8, realize tight contact, thereby connected the circuit of the DC motor of starter.
In the process that moving core 16 moves right, the driven wheel that the direct current machine of starter drives and the gear ring on the engine flywheel mesh, and thus rotatablely moving of motor are delivered to engine flywheel, to pilot engine.
After engine was realized starting, ignition switch was released when being in closure state (be electromagnetic switch), and the electromagnetic force that solenoid 6 acts on moving core 16 disappears.Moving core 16 is moved to the left under the effect of the reset force of the second back-moving spring 24c, and by shift fork 10 driven wheel is pulled away from gear ring on the engine flywheel.Along with moving core 16 is moved to the left, the second back-moving spring 24c becomes the lax relatively state that is in gradually.
In this process, pushes against sleeve device 12 also is moved to the left under the effect of the reset force of the first back-moving spring 24a and the 3rd back-moving spring 24b; That is to say that the radially projection of the right part of interior pushes against sleeve 12b moves from the direction of the state shown in Fig. 4 a towards contact bridge 14 and mount pad 28.When moving to the position shown in Fig. 4 b, under the effect of the reset force of the first back-moving spring 24a, the projection radially outward of the right part of interior pushes against sleeve 12b can touch contact bridge 14 and mount pad 28, and produces an additional impact.This additional impact is added the reset force of the first back-moving spring 24a, helps contact bridge 14 is pulled away from two binding posts 10, disconnects the circuit of DC motor thus.
In addition, because the pushing effect of the second back-moving spring 24c that spring constant is bigger, moving core 16 can promptly be moved to the left after ignition switch is unclamped together with cylindrical member 18, and then makes bottom, the right side 18a of cylindrical member 18 can collide the second end 22a of connecting rod 22.Simultaneously, in the process that connecting rod 22 is moved to the left, the radially projection of the right part of pushes against sleeve 12b in the radially projection at the first end 22b place of connecting rod 22 can collide.The inertia of moving core 16 is bigger, therefore can produce bigger bump or impact to connecting rod 22.This bump or impulsive force are delivered to contact bridge 14 by the first end 22b of connecting rod, thereby help the welding between disjunction contact bridge 14 and the binding post 8.The collision that produces in the second end 22a and the first end 22b place of connecting rod 22 all helps contact bridge 14 is pulled away from two binding posts 10, disconnects the circuit of DC motor thus.
Fig. 3 has shown the circuit diagram according to starter of the present utility model.Below in conjunction with Fig. 2 and Fig. 3 operating process according to starter of the present utility model is described.
As shown in Figure 3, the solenoid 6 among Fig. 2 is made up of hold-in winding HW and engagement coil EW two parts, and wherein the direction of winding of hold-in winding HW and engagement coil EW is opposite.The coil turn of hold-in winding HW (for example being 300 circles) is far longer than the coil turn (for example being 5 circles) of engagement coil EW.When the ignition switch 120 among Fig. 3 is closed, from the electric current of power supply 100 can flow through a T50, ignition switch 120, engagement coil EW, some T45, thereby make the DC motor M of starter begin to rotate from inactive state.
At this moment, the current opposite in direction in hold-in winding HW and engagement coil EW, so the electromagnetic force that hold-in winding HW produces is also opposite with the electromagnetic force direction that engagement coil EW produces.But, because the number of ampere turns of engagement coil EW is much smaller than the number of ampere turns of hold-in winding HW, so the electromagnetic force that the electromagnetic force that hold-in winding HW produces produces much larger than engagement coil EW.Hold-in winding HW and engagement coil EW moving core 16, cylindrical member 18 that produce, that remaining electromagnetic force can drive among Fig. 4 after cancelling out each other move right, and touch binding post 8 up to contact bridge 14, and connect the circuit of DC motor M.
After engine start, when ignition switch 120 was released, hold-in winding HW was by short circuit.The coil turn of hold-in winding HW is bigger, and its inductance coefficent is higher.When ignition switch 120 discharged, the electric current in hold-in winding HW became the zero process from the operate as normal value, and hold-in winding HW can induce electromagnetic force.This electromagnetic force can hinder moving core 16 and move to post acceleration, thereby is unfavorable for that movable core 16 is pulled away from two binding posts 8 by making axle 22 produce bigger collision impact power with contact bridge 14.
In order to overcome the problems referred to above, comprise a discharge device 200 according to the control circuit of starter of the present utility model, as shown in Figure 3.When ignition switch 120 discharged, discharge device 200 was used for the electric energy of hold-in winding HW is discharged fast.
Preferably, this discharge device 200 is diodes, and is arranged in the control circuit of starter with hold-in winding HW with being in parallel.The discharge device 200 of diode type makes the current lead-through that flows to T31 from T50, and the electric current of reverse flow is cut off.Optionally, this discharge device 300 can also be triode, with as unidirectional conducting, the switch electronic device that oppositely ends.Further preferred, this discharge device can be the power component of a switching circuit or unidirectional conducting, makes that the energy among the hold-in winding HW can be released as early as possible.
At last, the invention also discloses a kind of vehicle starter, comprising: motor; The transmission mechanism that links to each other with the output shaft of motor; And foregoing electromagnetic switch, it controls the operation of described motor and transmission mechanism.
Although description details specific implementations of the present utility model, they only are exemplary the providing of purpose of be explaining, not should be understood to the utility model protection range constituted limit.Under the prerequisite that does not break away from the utility model spirit and scope, the utility model can carry out various replacements, variants and modifications, and these replace, variants and modifications all the protection range of claims within.
Claims (12)
1. an electromagnetic switch that is used for vehicle starter comprises: fixed iron core; Be positioned at fixed iron core left side and can towards with the moving core that moves away from fixed iron core; Solenoid is for generation of the electromagnetic force that moves towards fixed iron core unshakable in one's determination that innervates; Be located at a pairs of posts at the place, right side of fixed iron core; It is characterized in that electromagnetic switch also is provided with:
Pass the pushes against sleeve device of fixed iron core slidably, it has first end of close binding post and second end opposite with first end, on its first end contact bridge is installed slidably; And
First back-moving spring, it applies active force in the pushes against sleeve device along the direction away from binding post;
The pushes against sleeve device is set up as follows: after the electromagnetic switch energising, the pushes against sleeve device moves towards the binding post direction, touch binding post to drive contact bridge, and first end of pushes against sleeve device is separated from contact bridge one segment distance; After electromagnetic switch outage, the direction away from binding post moves in the effect lower edge of first back-moving spring along with the pushes against sleeve device, and first end of pushes against sleeve device collides contact bridge.
2. the electromagnetic switch for vehicle starter as claimed in claim 1 is characterized in that: described pushes against sleeve device comprises outer pushes against sleeve tube and is slidably disposed on the interior pushing member of outer pushes against sleeve tube inboard;
The interior member that pushes is provided with projection radially outward at the end place near binding post, and it is separated from contact bridge one segment distance after the electromagnetic switch energising, and clashes into contact bridge after the electromagnetic switch outage.
3. the electromagnetic switch for vehicle starter as claimed in claim 1 or 2 is characterized in that: described first back-moving spring is resisted against between second end and fixed iron core of outside projection of pushes against sleeve device, and arranges around the pushes against sleeve device.
4. the electromagnetic switch for vehicle starter as claimed in claim 2, it is characterized in that: outer pushes against sleeve tube and interior pushing member are provided with the projection radially outward that can abut against mutually respectively at the end place away from binding post.
5. the electromagnetic switch for vehicle starter as claimed in claim 2 is characterized in that: the pushing member is interior pushes against sleeve in described; Described electromagnetic switch also is provided with the connecting rod that runs through interior pushes against sleeve and can slide therein; Described connecting rod comprises radial outside and first end of close binding post and the second opposite end that can project into interior pushes against sleeve, and be configured to along with moving core moves away from fixed iron core an end of the close binding post of pushes against sleeve in first end of connecting rod collides.
6. the electromagnetic switch for vehicle starter as claimed in claim 5, it is characterized in that: second end of connecting rod is arranged in the through hole of moving core, first end and second end of connecting rod have projection radially outward respectively, and the inwall of the through hole of moving core is formed with radially inwardly projection;
Described connecting rod is set up as follows: in the process that moving core moves away from fixed iron core, the radially inside projection of moving core collides the projection radially outward of second end of connecting rod, and/or the projection radially outward of first end of connecting rod collides an end of the close binding post of interior pushes against sleeve.
7. the electromagnetic switch for vehicle starter as claimed in claim 3 is characterized in that: cylindrical member is fixedly arranged in the through hole of moving core, and the bottom, right side of cylindrical member has through hole; Thereby the size of first end of connecting rod can run through through hole by cylindrical member less than the size of the through hole of cylindrical member, and the size of second end of connecting rod is greater than the size of the through hole of cylindrical member.
8. the electromagnetic switch for vehicle starter as claimed in claim 1 or 2, it is characterized in that: be equipped with second back-moving spring in the through hole of moving core, it abuts against the right-hand end of moving core and second end of pushes against sleeve device respectively.
9. the electromagnetic switch for vehicle starter as claimed in claim 1, it is characterized in that: described electromagnetic switch comprises control circuit, described control circuit is provided with the discharge device that is connected in parallel with solenoid;
Described discharge device is access in the control circuit of electromagnetic switch as follows: when electromagnetic switch was switched on, described discharge device was in off state; When electromagnetic switch was cut off the power supply, described discharge device was in conducting state, to form closed circuit with solenoid.
10. the electromagnetic switch for vehicle starter as claimed in claim 9 is characterized in that: solenoid comprises hold-in winding and engagement coil, and both winding directions are opposite, and the number of ampere turns of hold-in winding is much larger than the number of ampere turns of engagement coil; Described discharge device is in parallel with hold-in winding and is connected.
11. as claim 9 or 10 described electromagnetic switch for vehicle starter, it is characterized in that: described discharge device is that diode, triode or other have unidirectional conducting oppositely by power tube or the switch electronic device of function.
12. a vehicle starter comprises: DC motor; The transmission mechanism that links to each other with the output shaft of motor; And as each described electromagnetic switch in the claim 1 to 11, it controls the operation of described DC motor and transmission mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220659502 CN203055799U (en) | 2012-12-04 | 2012-12-04 | Vehicle starter and electromagnetic switch thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220659502 CN203055799U (en) | 2012-12-04 | 2012-12-04 | Vehicle starter and electromagnetic switch thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203055799U true CN203055799U (en) | 2013-07-10 |
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ID=48738726
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220659502 Withdrawn - After Issue CN203055799U (en) | 2012-12-04 | 2012-12-04 | Vehicle starter and electromagnetic switch thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203055799U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103854927A (en) * | 2012-12-04 | 2014-06-11 | 博世汽车部件(长沙)有限公司 | Vehicle starter and electromagnetic switch thereof |
-
2012
- 2012-12-04 CN CN 201220659502 patent/CN203055799U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103854927A (en) * | 2012-12-04 | 2014-06-11 | 博世汽车部件(长沙)有限公司 | Vehicle starter and electromagnetic switch thereof |
| CN103854927B (en) * | 2012-12-04 | 2017-07-11 | 博世汽车部件(长沙)有限公司 | Vehicle starter and its electromagnetic switch |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130710 Effective date of abandoning: 20170711 |