CN109209718B - Starter and overload fusing protection device thereof - Google Patents
Starter and overload fusing protection device thereof Download PDFInfo
- Publication number
- CN109209718B CN109209718B CN201710530448.8A CN201710530448A CN109209718B CN 109209718 B CN109209718 B CN 109209718B CN 201710530448 A CN201710530448 A CN 201710530448A CN 109209718 B CN109209718 B CN 109209718B
- Authority
- CN
- China
- Prior art keywords
- current
- fuse protector
- starter
- overload
- switch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000007858 starting material Substances 0.000 title claims abstract description 57
- 230000001012 protector Effects 0.000 claims abstract description 79
- 230000001681 protective effect Effects 0.000 claims abstract description 37
- 238000009413 insulation Methods 0.000 claims abstract description 7
- 239000004020 conductor Substances 0.000 claims description 14
- 239000011810 insulating material Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 description 11
- 238000010586 diagram Methods 0.000 description 8
- 230000017525 heat dissipation Effects 0.000 description 4
- 229910001006 Constantan Inorganic materials 0.000 description 3
- 238000012938 design process Methods 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N11/00—Starting of engines by means of electric motors
- F02N11/10—Safety devices
- F02N11/106—Safety devices for stopping or interrupting starter actuation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N11/00—Starting of engines by means of electric motors
- F02N11/08—Circuits or control means specially adapted for starting of engines
- F02N11/0814—Circuits or control means specially adapted for starting of engines comprising means for controlling automatic idle-start-stop
- F02N11/0818—Conditions for starting or stopping the engine or for deactivating the idle-start-stop mode
- F02N11/0822—Conditions for starting or stopping the engine or for deactivating the idle-start-stop mode related to action of the driver
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N2200/00—Parameters used for control of starting apparatus
- F02N2200/04—Parameters used for control of starting apparatus said parameters being related to the starter motor
- F02N2200/044—Starter current
Abstract
The invention discloses a starter and an overload fuse protector thereof, wherein the starter comprises a relay and a switch, a storage battery terminal 30-II and a switch input terminal 50-II are arranged on the relay, and a switch input terminal 50-I, a storage battery terminal 30-I and a motor terminal 30b are arranged on the switch, wherein the overload fuse protector comprises a protective cover body and an electric connecting piece arranged in the protective cover body, the electric connecting piece is electrically connected with the relay and the switch, and the electric connecting piece comprises a connecting piece main body and a current limiting groove fuse protector connected with the connecting piece main body. When the driving gear cannot be meshed into the gear ring to generate a top tooth, the attraction coil is forced to be electrified for a long time, the current in the coil is larger, the current-limiting groove fusing protection part of the overload fusing protection device fuses in time, the loop current is disconnected, the starter stops working, and the purpose of overload fusing protection of the starter is achieved. The overload fusing protection device greatly reduces the influence of insulation failure on the starter and prolongs the service life of the starter.
Description
Technical Field
The invention relates to a starter, in particular to a starter with an overload protection function, which is provided with an overload fuse protector.
Background
Referring to fig. 1 and 2, a conventional ground loop starter circuit schematic includes: three main parts of the relay 1, the switch 4 and the motor 10 and related connecting wires. The switch 4 includes a pull-in coil L1 and a hold coil L2. The relay 1 is provided with a storage battery terminal 30-II, a switch input terminal 50-II and a relay control terminal 50c, the switch 4 is provided with a switch input terminal 50-I, a storage battery terminal 30-I and a motor terminal 30b, the two ends of the storage battery terminal 30-I of the switch 4 and the storage battery terminal 30-II of the relay 1 are connected through a connecting lead 9 in a circuit manner, the two ends of the switch input terminal 50-I of the switch 4 and the switch input terminal 50-II of the relay 1 are connected through another connecting lead 5 in a circuit manner, the motor terminal 30b is connected with the electric input end of the motor 10, and exposed parts such as the relay 1, the switch 4, the connecting leads 5 and 9 are shielded through a shield 7, so that the purpose of protection is achieved. The relay 1, the switch 4 and the motor 10 are grounded through structural design, and the relay control terminal 50c and the storage battery terminal 30-I are respectively powered from a power supply or a control terminal. When the relay control terminal 50c receives the control signal, the relay 1 operates to energize the switch input terminal 50-II, and the switch 4 operates to energize the motor 10 from the power source, and the starter energizes to start the engine.
The coils in the switch 4 of the conventional auxiliary meshing starter are composed of a pull-in coil L1 and a holding coil L2, the turns of the two coils are basically equal, and the head ends of the two coils are connected together, namely, the switch input terminal 50-I and the tail end of the pull-in coil L1 are connected with a motor terminal 30b of the motor 10, and the tail end of the holding coil L2 is grounded.
Because the resistance of the pull-up coil L1 is smaller, such as a starter with the rated voltage of 24V, the resistance is generally about 100 milliohms, so that the starter can slowly rotate with small torque before the main contact of the switch 4 is closed, when the driving gear abuts against the end face of the flywheel gear ring, the driving gear can slowly rotate, and the driving gear is in a fork-shaped top tooth state and is meshed into the engine flywheel gear ring; after the gear ring is meshed, the main contact of the switch 4 is closed, a large current flows in the motor 10, and the starter can output a large torque, so that the occurrence of milling gear faults of the starter is avoided. Such a starter is therefore also referred to as a soft-mesh starter.
Because of the limited soft-mesh torque of such a starter, in some cases, the drive gear cannot mesh into the ring gear, thereby generating a top tooth phenomenon. Because the driving gear cannot mesh into the flywheel gear ring, the pull-up coil L1 is forced to be electrified for a long time, and the current in the coil is larger, so that the switch 4 of the auxiliary meshing type starter is easy to generate burning failure.
Disclosure of Invention
The invention aims to solve the problem that in the prior art, when a driving gear cannot be meshed into a gear ring to generate top teeth, a suction coil is forced to be electrified for a long time to easily generate burnout faults, and provides a starter provided with an overload fuse protector.
In order to achieve the above object, the overload fuse protector of the present invention is connected to a starter, the starter includes a relay on which a battery terminal 30-II, a switch input terminal 50-II, and a switch on which a switch input terminal 50-I, a battery terminal 30-I, and a motor terminal 30b are arranged, wherein the overload fuse protector includes a protection cover body and an electrical connection member provided in the protection cover body, the electrical connection member electrically connects the relay and the switch, and the electrical connection member includes a connection member main body and a current-limiting slot fuse protector connected with the connection member main body.
In an embodiment of the overload fuse protector, the electrical connector is integrally disposed with the protective cover body or separately disposed from the protective cover body.
In an embodiment of the overload fuse protector, when the electrical connection element is integrally arranged with the protective cover body, the electrical connection element is fully embedded or partially embedded in the protective cover body to be fully or partially combined with the protective cover body. The number of the electric connection elements is not limited according to the requirements of electric connection.
In an embodiment of the overload fuse protector, the fuse protector of the current-limiting slot has a rectangular structure, the connector body is connected to two sides of the fuse protector of the current-limiting slot, and a connection part between the connector body and the fuse protector of the current-limiting slot is in a step shape.
In an embodiment of the overload fuse protection device, the fuse protection portion of the current-limiting slot has a U-shaped structure, and the connector body is connected to two sides of the fuse protection portion of the current-limiting slot.
In an embodiment of the overload fuse protection device, the fuse protection portion of the current-limiting slot is connected to the connector body through a detachable structure.
In an embodiment of the overload fuse protection device, the current limiting slot fuse protection portion includes an insulation protection portion and a conductive portion, the insulation protection portion wraps the conductive portion, and the conductive portion is connected to the connector main body.
In an embodiment of the overload fuse protector, the protection cover body is made of an insulating material, and the connector body and the current-limiting slot fuse protector are integrally made of a conductive material, or the connector body and the current-limiting slot fuse protector are respectively made of a conductive material.
In one embodiment of the overload fuse protector, the electrical connector includes a first electrical connector through which the battery terminal 30-I and the battery terminal 30-II are electrically connected, and a second electrical connector through which the switch input terminal 50-I and the switch input terminal 50-II are electrically connected.
In an embodiment of the overload fuse protection device, the first electrical connector and the second electrical connector each include the current-limiting slot fuse protection portion, or one of the two includes the current-limiting slot fuse protection portion.
The present invention also provides a starter comprising a relay on which a battery terminal 30-II, a switch input terminal 50-II, and a switch on which a switch input terminal 50-I, a battery terminal 30-I, and a motor terminal 30b are arranged, and further comprising the overload fuse protector according to any one of claims 1 to 9.
The invention has the beneficial effects that the invention aims to provide a starter provided with an overload fuse protector and a starter design scheme comprising the overload fuse protector. When the driving gear cannot be meshed into the gear ring to generate a top gear, the attraction coil is forced to be electrified for a long time, the current in the coil is larger, and the current limiting groove of the overload fusing protection device fuses the protection part in time to break loop current, so that the starter stops working. The overload fusing protection device greatly reduces the influence of insulation failure on the starter and prolongs the service life of the starter.
The invention will now be described in more detail with reference to the drawings and specific examples, which are not intended to limit the invention thereto.
Drawings
FIG. 1 is a schematic circuit diagram of a conventional starter;
fig. 2 is an assembly schematic of a conventional starter;
FIG. 3 is a schematic view of an overload fuse protector of the present invention;
fig. 4 is an assembly schematic diagram of a starter equipped with an overload fuse protector of the present invention;
fig. 5 is a schematic circuit diagram of a starter equipped with an overload fuse protector of the present invention;
FIG. 6 is a schematic view of the structure of a first embodiment of an overload fuse protector of the present invention;
FIG. 7 is a schematic view of an electrical connector with a rectangular current-limiting slot fuse protection portion according to a first embodiment of the present invention;
FIG. 8 is a schematic view of a second embodiment of an overload fuse protector of the present invention;
FIG. 9 is a schematic structural view of an electrical connector with a U-shaped current-limiting slot overload fuse protection portion according to a second embodiment of the present invention;
FIG. 10 is a schematic structural view of a third embodiment of an overload fuse protector of the present invention;
fig. 11 is a schematic structural view of an overload fuse protector with a detachable fuse protector according to a third embodiment of the present invention;
FIG. 12 is a schematic view of a removable current-limiting slot fuse protector according to the present invention.
Wherein reference numerals are used to refer to
1-relay
2-relay 30 terminal fastening nut
3-relay 50 terminal fastening nut
4-electromagnetic switch
5-50 terminal lead assembly
6-relay 50c control terminal
7-guard shield
8-guard fastening nut
9-30 terminal lead assembly
10-motor
11-fusing protection device
12-protective cover body
13-switch main contact branch electric connector
14-switch coil branch electric connector
11a, 11b, 11 c-the overload fuse protector of the first, second and third embodiments respectively
12a, 12b, 12 c-are the first, second, third embodiment boot bodies, respectively
13a, 13b, 13 c-first, second, third embodiment switch main contact branch electrical connectors, respectively
14a, 14b, 14 c-first, second, third embodiment switching coil branch electrical connectors, respectively
13a1, 13b1, 13c 1-main contact branch connector body of a switch
14a1, 14b1, 14c 1-switching coil branch connector body
13a2, 14a 2-rectangular restricted flow fuse protector of first embodiment
13b2, 14b 2-second embodiment U-shaped current limiting groove fuse protector
13c2, 14c 2-third embodiment Detachable Current limiting groove fuse protector
15-insulation protection part
16-conductive part
17-relay 30-II terminal fastening nut
18-relay 50-II terminal fastening nut
19-switch 50-I terminal fastening nut
20-switch 30-I terminal fastening nut
Accumulator terminal on 30-II-relay
Switch input terminal on 50-II-relay
Input terminal on 50-I-switch
30-I-battery terminal
30 b-motor terminal
50 c-relay control terminal
31-I-electromagnetic switch grounding terminal
31-II-relay grounding terminal
31-III-motor grounding terminal
Detailed Description
The following detailed description of the present invention is provided with reference to the accompanying drawings and specific embodiments, so as to further understand the purpose, the scheme and the effects of the present invention, but not to limit the scope of the appended claims.
Referring to fig. 3, the overload fuse protector 11 for starter of the present invention is a schematic structural diagram, which mainly includes: the protective cover body 12 and the electrical connectors 13, 14, and the electrical connectors 13, 14 may be integrally arranged with the protective cover body 12 or separately arranged from the protective cover body 12. When the electrical connectors 13, 14 are integrally arranged with the protective cover body 12, they can be completely or partially combined with the protective cover body 12 in a pre-buried mode according to requirements in terms of structure, heat dissipation and the like.
Referring to fig. 4, a starter 100 structure equipped with an overload fuse protector according to the present invention mainly includes: relay 1, switch 4, overload fuse protector 11, relay 30-II terminal fastening nut 17 (which may be a flange nut or a flat + bullet + hex nut), relay 50-II terminal fastening nut 18, switch 50-I terminal fastening nut 19, switch 30-I terminal fastening nut 20, and other components of the starter. Referring to fig. 5, the schematic circuit diagram is different from that of fig. 1 in that a current-limiting protection part is provided on a main contact branch of the switch, which can be equivalent to a current-limiting resistor R1; the switch coil branch is provided with a current limiting protection part, and the current limiting protection part can be equivalent to a current limiting fusing resistor R2. The electrical connectors 13, 14 with the current-limiting slot fuse protection portion of the overload fuse protection device 11 respectively realize electrical connection of the battery terminals 30-I and 30-II, and the switch input terminals 50-I and 50-II.
When the driving gear cannot be meshed into the gear ring to generate a top gear, the pull-up coil L2 is forced to be electrified for a long time, and the current in the coil is larger, namely, the current I1 of the main contact branch of the starter switch and the current I2 of the branch of the switch coil are larger, the current and the electrified time can be limited and fused through the equivalent current-limiting fusing resistors R1 and R2 of the protection device, the starter circuit is powered off, the starter stops working, and the purpose of overload fusing protection of the starter is achieved.
First embodiment of overload fuse protector
In a first embodiment of the overload fuse protector of the present invention shown in fig. 6, the fuse protector 11a includes a protective housing 12a and electrical connectors 13a, 14a. The electrical connection 13a provides for electrical connection of the battery terminals 30-I and 30-II, i.e. the switching main contact legs, and the electrical connection 14a provides for electrical connection of the switching input terminals 50-I and 50-II, i.e. the switching coil legs. The electrical connectors 13a, 14a may be integrally arranged with the protective cover body 12a or separately arranged from the protective cover body 12 a. When the electrical connectors 13a, 14a are integrally arranged with the protective cover body 12a, they can be completely or partially combined with the protective cover body 12a in a pre-buried mode according to requirements in terms of structure, heat dissipation and the like.
As shown in the schematic structural diagram of the electrical connector with rectangular current-limiting slot fuse protection portion shown in fig. 7, the electrical connector 13a for the switch main contact branch includes a connector main body 13a1 and a current-limiting slot fuse protection portion 13a2, the current-limiting slot fuse protection portion 13a2 is configured as a rectangular structure, the connection portion with the connector main body 13a1 is designed as a step connection, and the connector main body 13a1 and the current-limiting slot fuse protection portion 13a2 are integrally formed by conductive materials. The conductive material may be a conductive metal plate, a conductive wire, a conductive rod, or the like. The electrical connector 14a for switching coil branch comprises a connector body 14a1 and a current-limiting slot fuse protector 14a2, wherein the current-limiting slot fuse protector 14a2 is rectangular, the junction with the connector body 14a1 is designed as a step connection, and the connector body 14a1 and the current-limiting slot fuse protector 14a2 are integrally formed by conductive materials.
It is apparent that the current limiting slot fuse protector is narrower than the connector body and that when the starter is in operation, the switching main contact leg of the electrical connector 13a and the switching coil leg of the electrical connector 14a are passed by currents I1 and I2, respectively. The current limiting slot fuse protecting parts 13a2 and 14a2 can limit the magnitude and time of the passing currents I1 and I2.
The step-type design parameters of the junction of the current-limiting groove fusing protection part and the connecting piece main body can be set according to the working current of the starter and the parameters of the selected conductive materials, and the design process of the cross-sectional area range of the fusing part of the current-limiting groove fusing protection part is as follows:
firstly, an electric connecting piece made of a specific material, such as constantan, is selected, the resistivity rho, the specific heat capacity coefficient k, the density b and the melting point T0 are all constants capable of being inquired, and the volume of the material to be liquefied when the fusing protection part is fused is set to be V, so that the energy E1 in unit volume, the energy E and the cross section area S of the fusing protection part can be calculated according to the following formula:
equation 1) energy per unit volume:
E1＝E/V＝I 2 Rt/V
i-a starter with a current at the top of the tooth, typically 24V rated, of about 280A;
r-resistance r=ρ×l/S;
l-length of material to be liquefied when fused;
t-energizing time is 0.1-5 s.
Equation 2) energy E required to fuse the volume V of material:
E＝m×△T×k＝b×V×△T×k
m-mass of material to be liquefied when fused;
DeltaT-the temperature required for fusing.
From equations 1), 2) Δt=i 2 ×ρ×t/b×S 2 k
Additionally, setting 20 ℃ delta T < T0, i.e 2 ×ρ×t/b×S 2 k＜20℃+T0；
From the above known parameters, the cross-sectional area S of the fuse protector can be calculated.
When the driving gear cannot be meshed into the gear ring to generate top teeth, the attraction coil is forced to be electrified for a long time, for example, 0.1-5 s is electrified, and the current in the coil is larger, namely, the current I1 of the main contact branch of the starter switch and the current I2 of the branch of the switch coil are larger, the protection parts are fused at the positions of the current limiting grooves fusing protection parts 13a2 and 14a2 due to larger current, heat is increased and accumulated, the protection parts are fused, and the starter circuit is powered off, so that the fusing protection function is realized.
Second embodiment of overload fuse protector
In a second embodiment of the overload fuse protector of the present invention shown in fig. 8, the fuse protector 11b includes a protective housing 12b and electrical connectors 13b, 14b. The electrical connection 13b provides for electrical connection of the battery terminals 30-I and 30-II, i.e. the switching main contact legs, and the electrical connection 14b provides for electrical connection of the switching input terminals 50-I and 50-II, i.e. the switching coil legs. The electrical connectors 13b, 14b may be integrally arranged with the protective cover body 12b or separately arranged from the protective cover body 12 b. When the electrical connectors 13b, 14b are integrally arranged with the protective cover body 12b, they can be completely or partially combined with the protective cover body 12b in a pre-buried mode according to requirements in terms of structure, heat dissipation and the like.
As shown in fig. 9, the electrical connector 13b for switching the main contact branch includes a connector body 13b1 and a current-limiting slot fuse protector 13b2, wherein the current-limiting slot fuse protector 13b2 is configured as a U-shaped structure and is connected to the connector body 13b1, and the connector body 13b1 and the current-limiting slot fuse protector 13b2 are integrally formed of a conductive material. The electrical connector 14b for switching coil branch comprises a connector body 14b1 and a current-limiting slot fuse protector 14b2, wherein the current-limiting slot fuse protector 14b2 is connected with the connector body 14b1 in a U-shaped structure, and the connector body 14b1 and the current-limiting slot fuse protector 14b2 are integrally formed by conductive materials.
When the starter is in operation, the switching main contact branch of the electrical connection 13b and the switching coil branch of the electrical connection 14b are passed by the currents I1 and I2, respectively. The current limiting slot fuse protecting parts 13b2 and 14b2 can limit the magnitude and time of the passing currents I1 and I2.
The design parameters of the U-shaped current-limiting groove fusing protection part can be set according to the working current of the starter and the parameters of the selected conductive materials, and the design process of the cross-sectional area range of the fusing part of the current-limiting groove fusing protection part is as follows:
firstly, an electrical connector made of a specific material, such as constantan, is selected, the resistivity rho, the specific heat capacity coefficient k, the density b and the melting point T0 of the electrical connector are all constants capable of being queried, the volume of the material to be liquefied when the fusing protection part is fused is set to be V, the length of the material to be liquefied when the fusing protection part is fused is set to be L, and the fusing part can be approximately rectangular in cross section and is of a three-dimensional structure with the length of L because the length of the fusing point is short, so that the energy E1 per unit volume, the energy E per unit cross section S and the cross section S of the fusing protection part can be calculated according to the formula of the first embodiment.
When the driving gear cannot be meshed into the gear ring to generate a top gear, the attraction coil is forced to be electrified for a long time, and the current in the coil is larger, namely, the current I1 of the main contact branch of the starter switch and the current I2 of the branch of the switch coil are larger, the protection part is fused at the current limiting groove fusing protection part because of larger current, heat is increased and accumulated, the protection part is fused, the bottoms of the U-shaped current limiting groove fusing protection parts 13b2 and 14b2 are fused preferentially, and the starter circuit is powered off, so that the fusing protection function is realized.
Third embodiment of overload fuse protector
In a third embodiment of the overload fuse protector of the present invention shown in fig. 10, the fuse protector 11c includes a protective housing 12c and electrical connectors 13c, 14c. The electrical connection 13c provides for electrical connection of the battery terminals 30-I and 30-II, i.e. the switching main contact legs, and the electrical connection 14c provides for electrical connection of the switching input terminals 50-I and 50-II, i.e. the switching coil legs. The electrical connectors 13c, 14c may be integrally disposed with the shield body 12c or may be disposed separately from the shield body 12 c. When the electric connector is integrally arranged with the protective cover body 12c, the electric connector can be completely or partially combined with the protective cover body 12c in a pre-buried mode according to requirements in terms of structure, heat dissipation and the like.
As shown in fig. 11, the electrical connector 13c for the switch main contact branch includes a connector main body 13c1 and a current-limiting slot fuse protector 13c2, wherein the current-limiting slot fuse protector 13c2 is configured as a detachable structure, and is connected with the connector main body 13c1 and the protective cover main body 12c in a plug-in manner, and the connector main body 13c1 and the current-limiting slot fuse protector 13c2 are respectively formed by processing conductive materials. The electrical connector 14c for switching coil branch comprises a connector body 14c1 and a current-limiting slot fuse protecting portion 14c2, wherein the current-limiting slot fuse protecting portion 14c2 is configured as a detachable structure, and is connected with the connector body 14c1 and the protective cover body 12c in a plugging manner, and the connector body 14c1 and the current-limiting slot fuse protecting portion 14c2 are respectively formed by processing conductive materials.
As shown in the schematic structural diagram of the detachable current-limiting slot fuse protection portion shown in fig. 12, the detachable current-limiting slot fuse protection portions 13c2, 14c2 include an insulating protection portion 15 and a conductive portion 16, and the conductive portion 16 is designed to have a U-shaped structure. The current limiting groove fuse protector parts 13c2, 14c2 are respectively inserted into the connector bodies 13c1, 14c1 and the protective cover body 12 c.
When the starter is in operation, the switching main contact branch of the electrical connection 13c and the switching coil branch of the electrical connection 14c are passed by the currents I1 and I2, respectively. The current limiting slot fuse protecting parts 13c2 and 14c2 can limit the magnitude and time of the passing currents I1 and I2.
The design parameters of the conductive parts 16 of the detachable current-limiting slot fusing protection parts 13c2 and 14c2 can be set according to the working current of the starter and the parameters of the selected conductive materials, and the design process of the cross-sectional area range of the fusing parts of the current-limiting slot fusing protection parts 13c2 and 14c2 is as follows:
firstly, an electrical connector made of a specific material, such as constantan, is selected, the resistivity rho, the specific heat capacity coefficient k, the density b and the melting point T0 of the electrical connector are all constants capable of being queried, the volume of the material to be liquefied when the fusing protection part is fused is set to be V, the length of the material to be liquefied when the fusing protection part is fused is set to be L, and the fusing part can be approximately rectangular in cross section and is of a three-dimensional structure with the length of L because the length of the fusing point is short, so that the energy E1 per unit volume, the energy E per unit cross section S and the cross section S of the fusing protection part can be calculated according to the formula of the first embodiment.
When the driving gear cannot be meshed into the gear ring to generate top teeth, the attraction coil is forced to be electrified for a long time, and the current in the coil is larger, namely, the current I1 of the main contact branch of the starter switch and the current I2 of the branch of the switch coil are larger, the current limiting groove fusing protection parts 13c2 and 14c2 are fused due to larger current, heat is increased and accumulated, the fusing protection parts 13c2 and 14c2 of the current limiting groove are fused preferentially at the bottom of the U-shaped current limiting groove fusing protection part, and the starter circuit is powered off, so that the fusing protection function is realized.
Fourth embodiment of overload fuse protector
Referring to the schematic circuit diagram of fig. 5, the switch main contact branch is provided with a current limiting protection part, which can be equivalent to a current limiting resistor R1; the switch coil branch is provided with a current limiting protection part, and the current limiting protection part can be equivalent to a current limiting fusing resistor R2. The electrical connections 13, 14 with the current-limiting slot fuse protection in the overload fuse protector 11 make electrical connection to the battery terminals 30-I and 30-I, and the switch input terminals 50-I and 50-II, respectively. The overload fuse protector 11 comprises a protective housing body and electrical connections 13 for the switching main contact branch and 14 for the switching coil branch, which serve as electrical connections.
Wherein the electrical connection 13 for the switching main contact leg and the electrical connection 14 for the switching coil leg may both comprise a current-limiting slot fuse protection, or one of the two leg electrical connections 13, 14 may comprise a current-limiting slot fuse protection.
Of course, the present invention is capable of other various embodiments and its several details are capable of modification and variation in light of the present invention, as will be apparent to those skilled in the art, without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (8)
1. The overload fusing protection device is connected to a starter, the starter comprises a relay and a switch, a storage battery terminal 30-II and a switch input terminal 50-II are arranged on the relay, and a switch input terminal 50-I, a storage battery terminal 30-I and a motor terminal 30b are arranged on the switch, and the overload fusing protection device is characterized by comprising a protective cover body and an electric connecting piece arranged in the protective cover body, wherein the electric connecting piece is electrically connected with the relay and the switch, and the electric connecting piece comprises a connecting piece main body and a current-limiting groove fusing protection part connected with the connecting piece main body;
the electric connector comprises a first electric connector and a second electric connector, the storage battery terminal 30-I and the storage battery terminal 30-II are electrically connected through the first electric connector, the switch input terminal 50-I and the switch input terminal 50-II are electrically connected through the second electric connector, the first electric connector and the second electric connector both comprise the current-limiting groove fusing protection part, or one of the first electric connector and the second electric connector comprises the current-limiting groove fusing protection part, the current-limiting groove fusing protection part comprises an insulation protection part and a conductive part, the insulation protection part covers the conductive part, and the conductive part is connected with the connector main body.
2. The overload fuse protector of claim 1, wherein the electrical connector is integrally disposed with the protective cover body or is disposed separately from the protective cover body.
3. The overload fuse protector of claim 2, wherein the electrical connector is fully or partially embedded in the protective cover body to fully or partially engage the protective cover body when the electrical connector is integrally disposed with the protective cover body.
4. The overload fuse protector of claim 1, wherein the fuse protector of the current-limiting slot has a rectangular structure, the connector body is connected to two sides of the fuse protector of the current-limiting slot, and a connection between the connector body and the fuse protector of the current-limiting slot is stepped.
5. The overload fuse protector of claim 1, wherein the current limiting slot fuse protector is of a U-shaped configuration, and the connector body is connected to both sides of the current limiting slot fuse protector.
6. The overload fuse protector of claim 1, wherein the current limiting slot fuse protector is connected to the connector body by a removable structure.
7. The overload fuse protector of any one of claims 1 to 6, wherein the protective cover body is made of an insulating material, the connector body and the current-limiting slot fuse protector are integrally made of a conductive material, or the connector body and the current-limiting slot fuse protector are respectively made of a conductive material.
8. Starter comprising a relay on which a battery terminal 30-II, a switch input terminal 50-II and a switch on which a switch input terminal 50-I, a battery terminal 30-I and a motor terminal 30b are arranged, characterized by further comprising an overload fuse protector according to any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710530448.8A CN109209718B (en) | 2017-07-03 | 2017-07-03 | Starter and overload fusing protection device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710530448.8A CN109209718B (en) | 2017-07-03 | 2017-07-03 | Starter and overload fusing protection device thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109209718A CN109209718A (en) | 2019-01-15 |
| CN109209718B true CN109209718B (en) | 2024-02-06 |
Family
ID=64991749
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710530448.8A Active CN109209718B (en) | 2017-07-03 | 2017-07-03 | Starter and overload fusing protection device thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109209718B (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0801457A1 (en) * | 1996-03-14 | 1997-10-15 | Réalisations et Diffusion pour l'Industrie (R.D.I) | Protection device for electric motor, corresponding process and electrically powered driving device with such protection device |
| WO2002016763A1 (en) * | 2000-08-25 | 2002-02-28 | Robert Bosch Gmbh | Electrical starting arrangement for internal combustion engines with overload protection |
| CN1703814A (en) * | 2002-10-09 | 2005-11-30 | 索尼化学株式会社 | Secondary battery with protective circuit |
| CN101277009A (en) * | 2007-03-30 | 2008-10-01 | 卢浩义 | Vehicle power supply circuit as well as semiconductor protection control system of electric apparatus electronic equipments |
| CN202768215U (en) * | 2012-08-21 | 2013-03-06 | 北京佩特来电器有限公司 | Multipled starting device with overtemperature protection device |
| CN203730197U (en) * | 2014-02-19 | 2014-07-23 | 北京佩特来电器有限公司 | Electronic relay and starter with protection function |
| CN104847560A (en) * | 2014-02-19 | 2015-08-19 | 北京佩特来电器有限公司 | Electronic relay, starter with protection function and control method of starter |
| CN106150822A (en) * | 2015-04-14 | 2016-11-23 | 新疆科立机械设备有限公司 | A kind of starter duplicate protection control system |
| CN206210640U (en) * | 2016-11-28 | 2017-05-31 | 北京佩特来电器有限公司 | A kind of starter shield and the starter including the starter shield |
| CN207297213U (en) * | 2017-07-03 | 2018-05-01 | 北京佩特来电器有限公司 | A kind of starter and its overload fuse protecting device |
-
2017
- 2017-07-03 CN CN201710530448.8A patent/CN109209718B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0801457A1 (en) * | 1996-03-14 | 1997-10-15 | Réalisations et Diffusion pour l'Industrie (R.D.I) | Protection device for electric motor, corresponding process and electrically powered driving device with such protection device |
| WO2002016763A1 (en) * | 2000-08-25 | 2002-02-28 | Robert Bosch Gmbh | Electrical starting arrangement for internal combustion engines with overload protection |
| CN1703814A (en) * | 2002-10-09 | 2005-11-30 | 索尼化学株式会社 | Secondary battery with protective circuit |
| CN101277009A (en) * | 2007-03-30 | 2008-10-01 | 卢浩义 | Vehicle power supply circuit as well as semiconductor protection control system of electric apparatus electronic equipments |
| CN202768215U (en) * | 2012-08-21 | 2013-03-06 | 北京佩特来电器有限公司 | Multipled starting device with overtemperature protection device |
| CN203730197U (en) * | 2014-02-19 | 2014-07-23 | 北京佩特来电器有限公司 | Electronic relay and starter with protection function |
| CN104847560A (en) * | 2014-02-19 | 2015-08-19 | 北京佩特来电器有限公司 | Electronic relay, starter with protection function and control method of starter |
| CN106150822A (en) * | 2015-04-14 | 2016-11-23 | 新疆科立机械设备有限公司 | A kind of starter duplicate protection control system |
| CN206210640U (en) * | 2016-11-28 | 2017-05-31 | 北京佩特来电器有限公司 | A kind of starter shield and the starter including the starter shield |
| CN207297213U (en) * | 2017-07-03 | 2018-05-01 | 北京佩特来电器有限公司 | A kind of starter and its overload fuse protecting device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109209718A (en) | 2019-01-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4191985A (en) | Interrupter | |
| TWI625754B (en) | Protective member | |
| JPH0134301B2 (en) | ||
| CN100408382C (en) | Vehicle electrical protection device and system employing same | |
| JP5278846B2 (en) | SPD with separation mechanism | |
| US8786160B2 (en) | Brush holder for an electric motor | |
| JP6357221B2 (en) | Protective device | |
| US10283293B2 (en) | Thermal circuit breaker | |
| MX2008003024A (en) | Electrical distribution device including protection for overheating conditions. | |
| US20210090838A1 (en) | Circuit protection device | |
| JP5959447B2 (en) | Surge protection device | |
| JP5626234B2 (en) | Overcurrent protection device | |
| GB1604111A (en) | Overload prevention circuit for an electric motor | |
| CN109209718B (en) | Starter and overload fusing protection device thereof | |
| CA2898858A1 (en) | Medium voltage controllable fuse | |
| US6359443B1 (en) | Device for detecting abnormality of wire harness for vehicle and power supply device for vehicle | |
| US10107249B2 (en) | Motor vehicle starter provided with a thermal protection system | |
| JP4842004B2 (en) | SPD for direct lightning strike | |
| US9590476B2 (en) | System for protecting against heating for a rotating electric machine, in particular a starter | |
| CN207297213U (en) | A kind of starter and its overload fuse protecting device | |
| BR9905118A (en) | Electrical supply circuit for a starter, and, motor vehicle starter | |
| JP2019514333A (en) | Circuit arrangement for protection against excessive overheating | |
| JP6083570B2 (en) | SPD with separator | |
| JP2012109078A (en) | Spd with separator | |
| JP4943359B2 (en) | Protective element |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |