CN205723339U - Self-retaining protector - Google Patents
Self-retaining protector Download PDFInfo
- Publication number
- CN205723339U CN205723339U CN201620256293.4U CN201620256293U CN205723339U CN 205723339 U CN205723339 U CN 205723339U CN 201620256293 U CN201620256293 U CN 201620256293U CN 205723339 U CN205723339 U CN 205723339U
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- protector
- self
- ptc
- retaining
- bimetal leaf
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Abstract
This utility model relates to a kind of self-retaining protector, including: it is provided with the shell of binding post；It is provided with the base plate of binding post；Being configured to make the insulating part of insulation between shell and base plate, shell, base plate and insulating part fit together to limit inner space；The bimetal leaf being encapsulated in inner space and PTC assembly, bimetal leaf is fixed to shell and is provided with metal derby on bimetal leaf；And the stationary contact that cooperates and movable contact; stationary contact is fixed on base plate; movable contact is arranged on bimetal leaf; movable contact separates with stationary contact during operating in the protection of protector; and contacting with stationary contact during the non-protected of protector operates, metal derby abuts PTC assembly and PTC assembly abuts base plate.Thereby, it is possible to Simplified flowsheet, reduction cost, the good contact guaranteed between protector and motor winding make the response sensitivity of protector significantly improve.This utility model further relates to a kind of motor that can install described self-retaining protector.
Description
Technical field
This utility model relates to a kind of self-retaining protector, and described self-retaining protector is suitable for
In the electricity used by the electric equipments such as fruit juice mixer, soy bean milk making machine, blender, vacuum cleaner, electric tool
Machine.This utility model further relates to a kind of motor that can install described self-retaining protector.
Background technology
Protector is that a kind of bending rapidly utilizing bimetal leaf when exceeding protection temperature disconnects
The electric motor protective device that circuit connects.Bimetal leaf is existed by two-layer or three layers of different alloy combination
Together, the bimetallic sector-meeting heating when there being electric current to pass through.When motor normally works, bimetallic
Movable contact on sheet and the stationary contact on protector base plate are in the closure state contacted with each other, with
Make operating circuit normally.When the temperature of bimetal leaf is because electric current is excessive or ambient temperature
Too high and when reaching to protect temperature, owing to the thermal coefficient of expansion of different alloys is different, bimetallic
Sheet makes protector carry out protection operate because being bent rapidly by thermogenetic internal stress so that dynamic tactile
Point and stationary contact separate to cut off circuit, thus play heat protective effect.Protector should be close to electricity
It is fitted together with group of motors, in order to the accurately variations in temperature of perception motor winding machine winding.
At present, conventional on motor protector is broadly divided into two types: one is to be not provided with
The protector of temperature-sensitive element (PTC-element), this protector being not provided with PTC-element exists
After protection operation, once falling below reset temperature at a temperature of bimetal leaf, protector is just
Can automatically reset, make electrical power thus work on.This Automatic-reset protector can make
The working power of motor is switched on and off repeatedly, causes security performance poor.Another kind is to set
Having the self-retaining protector of PTC-element, its basic functional principle is as shown in Figure 1.At Fig. 1
Circuit in, open including self-retaining protector A, Current limited Control portion B, load C and circuit
Close D.Self-retaining protector A includes Automatic-reset protector A1 and PTC-element A2.
Self-retaining protector A is occurring after protection act, by Automatic-reset protector A1 and
PTC-element A2 the two part works in combination, as long as not turning off power supply, can pass through
The temperature of bimetal leaf is maintained above reset temperature by the voltage applied, thus realizes by protecting
Protect the self-retaining function that device keeps operating circuit to disconnect.For this self-retaining protector, must
The bimetal leaf needing manually deenergization and protector by the time cool to less than reset temperature it
After, protector could reset.Self-retaining protector will not make the working power of motor repeatedly
Being switched on and off, security performance is preferable.
But, in existing self-retaining protector, temperature-sensitive element (PTC-element) is not
Fully enclosed, therefore cannot carry out dipping lacquer process for the motor fitted together and protector,
But individually motor must be carried out dipping lacquer.Thus cause complex process, and cost increases.
It addition, in existing self-retaining protector, heat is typically passed through air and could pass
Being directed at bimetal leaf, the response therefore causing protector is insensitive.Sometimes, bimetal leaf needs
Through repeatedly action, could stably realize the self-retaining function of protector.
Utility model content
For drawbacks described above of the prior art, on the one hand, this utility model provides one
Self-retaining protector, comprising:
It is provided with the shell of binding post；
It is provided with the base plate of binding post；
It is configured to make the insulating part of insulation, described shell, the end between described shell and base plate
Plate and insulating part fit together to limit inner space；
Being encapsulated in the bimetal leaf in described inner space and PTC assembly, described bimetal leaf is solid
Determine to be provided with metal derby to shell and on described bimetal leaf；And
The stationary contact cooperated and movable contact, described stationary contact is fixed on base plate, described dynamic
Contact is arranged on bimetal leaf, and described movable contact is for the guarantor at described self-retaining protector
Separate with described stationary contact during protecting operation, and in the non-protected of described self-retaining protector
Contact with described stationary contact during operation,
Wherein, described metal derby abuts described PTC assembly and described PTC assembly abuts institute
State base plate.
It is different from prior art a structure part of PTC come out, this utility model
Self-retaining protector PTC assembly is entirely encapsulated in inside protector, therefore, it is possible to by group
The protector being fitted together and motor carry out dipping lacquer process in the lump, thus Simplified flowsheet, reduce into
This and guarantee the good contact between protector and motor winding.And, described self-sustaining
Formula protector achieves the metal derby of bimetal leaf, PTC assembly and base plate and remains in inside
Directly contact thus the heat transfer mode of quick conductive, thus make the response sensitivity of protector
Significantly improve.Generally, bimetal leaf only needs just can stably realize protector through 1 action
Self-retaining function.
Preferably, described PTC assembly includes PTC component and keeps component, described holding structure
Part is arranged on base plate and for keeping described PTC component.By described holding component, it is possible to
Facilitate and reliably install, dismantle and keep described PTC component, and being able to ensure that bimetallic
The metal derby of sheet, stable contact between PTC assembly and base plate.
Preferably, described PTC component is PTC-ceramic sheet.PTC-ceramic sheet is a kind of good
Resistor-type heater, its resistance value raises with temperature and increases with geometry magnitude until infinitely great,
Operating current reduce also with the rising of resistance value even by.
Preferably, described holding component is shell fragment.Elastic reaction by described shell fragment, it is possible to
PTC component is kept to fix and can bear and buffer common vibration and impact.
Preferably, described shell fragment includes that maintaining part, described maintaining part are configured for keeping described
PTC component is fixed.
Preferably, described shell fragment includes the reinforcement being arranged on bottom it.Described reinforcement constructs
Become in order to provide higher bounce, in order to better assure that the metal derby of bimetal leaf, PTC
Stable contact between assembly and base plate.
Preferably, described maintaining part includes two clamping limbs being arranged on described reinforcement both sides.
After completing the assembling of described PTC component, said two clamping limb fully opens, so that institute
State the shell fragment side not with described PTC component to contact.Thus, it is to avoid because of shell fragment and PTC
The side of component contacts and reduces the breakdown voltage of PTC component.
Preferably, described maintaining part includes the holding flange being arranged on the side of described shell fragment,
Described holding flange is outward-dipping, so that described shell fragment not side with described PTC component connects
Touch.Thus, it is to avoid reduce PTC component because the side of shell fragment with PTC component contacts
Breakdown voltage.
Preferably, described shell fragment is made up of SUS301 stainless steel material, and its thickness is about 0.15
Millimeter.
Preferably, on the bottom surface of one end that described movable contact is arranged on bimetal leaf, bimetal leaf
The end face of the other end be fixed to described shell and the bottom surface of the other end at described bimetal leaf
On described metal derby is set.
On the other hand, this utility model further relates to a kind of motor, can pacify on described motor
The self-retaining protector of dress the above-mentioned type.Thereby, it is possible to by the protector that fits together and
Motor carries out dipping lacquer process in the lump, thus Simplified flowsheet, reduction cost and guaranteeing at protector
And the good contact between motor winding.
Accompanying drawing explanation
By being considered in conjunction with the accompanying the following description to preferred embodiment of the present utility model,
Various target of the present utility model, feature and advantage will become apparent from.Accompanying drawing is only
Exemplary diagram of the present utility model, is not necessarily drawn to scale.In the accompanying drawings, equally
Reference represent same or similar parts all the time.
Fig. 1 is the operation principle explanatory diagram of self-retaining protector；
Fig. 2 is the overall schematic of existing self-retaining protector；
Fig. 3 is the sectional view of existing self-retaining protector；
Fig. 4 is the overall schematic according to self-retaining protector of the present utility model；
Fig. 5 is the decomposing schematic representation according to self-retaining protector of the present utility model；
Fig. 6 is the sectional view according to self-retaining protector of the present utility model；
Fig. 7 is to transmit situation according to the heat within self-retaining protector of the present utility model
Schematic diagram；
Fig. 8 is the schematic diagram according to shell fragment used in protector of the present utility model, wherein,
Fig. 8 (a) is the overall schematic of shell fragment, and Fig. 8 (b) shows installation PTC on shell fragment
The schematic diagram of the installation process of component, Fig. 8 (c) shows the reinforcement on shell fragment to PTC
Component provides the schematic diagram that more strength supports, and Fig. 8 (d) shows in the protection being completed
Device utilizes the reinforcement on shell fragment, keeps flange, clamping limb etc. to make PCT component position completely
Schematic diagram.
Detailed description of the invention
Introduce referring to the drawings according to self-retaining protector of the present utility model and can pacify
Fill the embodiment of the motor of described self-retaining protector.The content of description and accompanying drawing are substantially
The most exemplary, and it is not intended to limit by any way the protection of claims
Scope.
Unless otherwise stated, term used herein has the skill involved by this utility model
The those of ordinary skill in art field is it can be generally understood that the implication that arrives.Unless otherwise stated,
Term used in the specification and in the claims " includes " and " comprising " should be construed to
Open implication, say, that " including " and " comprising " should be construed to term " extremely
Include less " or " including at least " synonym.
As in figure 2 it is shown, in existing self-retaining protector 101, temperature-sensitive element (PTC
Element) 102 the most fully enclosed, i.e. being exposed at least partially of PTC-element 102,
Therefore dipping lacquer process cannot be carried out for the motor fitted together and protector, but must be single
Solely motor is carried out dipping lacquer.But, the winding of motor can be hardening after dipping lacquer, suffers from this,
The difficulty assembling protector on motor is strengthened, and is easily caused protector outer casing and electricity
Loose contact between machine winding.To this end, it is frequently necessary to be assembled on motor winding protector
Carry out touch-up paint process afterwards, cause complex process, and cost increases.
It addition, as it is shown on figure 3, in existing self-retaining protector 101, work as bimetallic
When movable contact 104 on sheet 103 and the stationary contact on base plate 105 106 separate, in protector
Heat transfer mode be PTC-element 102 → base plate, 105 → insulating cell, 107 → air →
Bimetal leaf 103.In the case, could conduct to bimetallic through air due to heat
Sheet 103, therefore the speed of heat transmission is relatively slow, thus is easily caused the response of protector 101
Insensitive.Sometimes, bimetal leaf 103 needs after 3-4 even more action,
Could stably realize the self-retaining function of protector.
For drawbacks described above of the prior art, as Figure 4-8, this utility model provides
A kind of self-retaining protector 1, comprising: be provided with the shell 2 of binding post；It is provided with terminals
The base plate 9 of son；It is configured to make the insulating part 10 of insulation between shell 2 and base plate 9, outward
Shell 2, base plate 9 and insulating part 10 fit together to limit inner space；It is encapsulated in described interior
Bimetal leaf 3 and PTC assembly in space, portion, bimetal leaf 3 be fixed to shell 2 and
Bimetal leaf 3 is provided with metal derby 4；And the movable contact 5 that cooperates and stationary contact 8, its
In, stationary contact 8 is fixed on base plate 9, and movable contact 5 is arranged on bimetal leaf 3.Dynamic tactile
Point 5 separates with stationary contact 8 during operating in the protection of self-retaining protector 1, and
Contact with stationary contact 8 during the non-protected of self-retaining protector 1 operates.Specifically, dynamic
On the bottom surface of one end that contact 5 is arranged on bimetal leaf 3, the top of the other end of bimetal leaf 3
Face is fixed to shell 2 and arranges metal derby 4 on the bottom surface of the other end of bimetal leaf 3.
In the protector 1 being completed, metal derby 4 abuts PTC assembly and PTC assembly supports
Connect base plate 9.
Preferably, PTC assembly includes PTC component 6 and keeps component 7, wherein, keeps structure
Part 7 is arranged on base plate 9 and for keeping PTC component 6.By keeping component 7, it is possible to
Facilitate and reliably install, dismantle and keep PTC component 6, and being able to ensure that bimetal leaf
Stable contact between metal derby 4, PTC assembly and the base plate 9 of 3.
It is different from prior art a structure part of PTC come out, this utility model
Self-retaining protector PTC assembly is entirely encapsulated in the inside of protector 1, therefore, it is possible to
The protector 1 fitted together and motor are carried out in the lump dipping lacquer process, thus Simplified flowsheet,
Reduce cost and guarantee the good contact between protector and motor winding.And, such as figure
Shown in 7, self-retaining protector 1 achieves the metal derby 4 of bimetal leaf 3, PTC in inside
Assembly remains with base plate 9 and directly contacts thus the heat transfer mode of quick conductive, thus
The response sensitivity making protector 1 significantly improves, and generally, bimetal leaf 3 only needs through 1 time
Action just can stably realize the self-retaining function of protector 1.
Preferably, PTC component 6 is PTC-ceramic sheet.PTC-ceramic sheet is a kind of good
Resistor-type heater, its resistance value raises with temperature and increases with geometry magnitude until infinitely great, work
Make electric current reduce also with the rising of resistance value even by.
Preferably, described holding component 7 is shell fragment.Elastic reaction by shell fragment 7, it is possible to
Keep PTC component 6 fixing and can bear and buffer common vibration and impact.
Preferably, described shell fragment 7 includes that maintaining part, described maintaining part are configured for keeping PTC
Component 6 is fixed.
Preferably, shell fragment 7 includes the reinforcement 703 being arranged on bottom it.Such as Fig. 8 (c) institute
Showing, reinforcement 703 is configured to provide higher bounce F, in order to better assure that double
Stable contact between the metal derby 4 of sheet metal 3, PTC assembly and base plate 9.
Preferably, as shown in Fig. 8 (a), maintaining part includes being arranged on reinforcement 703 both sides
Two clamping limbs 701 and 702.As shown in Fig. 8 (b), between clamping limb 701 and 702
Spacing is a length of L2 of L1, PTC component 6, then it suffices that relational expression L1 < L2, with
Clamping limb is enable to clamp PTC component 6 fully.As shown in Fig. 8 (b), PTC is being installed
During component 6, along with PTC component 6 is pressed down along the direction of arrow A, clamping limb 701
Gradually open along the direction of arrow B with 702, the folder formed between clamping limb and horizontal direction
Angle (as shown by arrow C) is gradually reduced.After completing the assembling of PTC component 6, folder
Gripping arm is fully opened, so that shell fragment 7 does not contacts with any side of PTC component 6.Thus,
Avoid reducing puncturing of PTC component 6 because the side of shell fragment 7 with PTC component 6 contacts
Voltage.
Preferably, as shown in Figure 8, the maintaining part of shell fragment 7 also includes the side being arranged on shell fragment 7
One or more holding flanges on limit, described holding flange is outward-dipping, so that shell fragment 7 is not
Contact with any side of PTC component 6.Thus, it is to avoid because of shell fragment 7 and PTC component
The side of 6 contacts and reduces the breakdown voltage of PTC component.
As shown in Fig. 8 (d), in the protector 1 being completed, shell fragment 7 is kept by it
The structures such as clamping limb 701 and 702, reinforcement 703 and holding flange in portion, it is ensured that
PTC component 6 positions completely and will not shift during the normal use of protector.
Preferably, shell fragment 7 is made up of SUS301 stainless steel material, its thickness about 0.15 millimeter.
On the other hand, this utility model additionally provides a kind of motor, can on described motor
The self-retaining protector 1 of the above-mentioned type is installed.Thereby, it is possible to the self-insurance that will fit together
Hold formula protector 1 and motor carries out dipping lacquer process in the lump, thus Simplified flowsheet, reduction cost are also
And guarantee the good contact between self-retaining protector 1 and motor winding.
Although disclose this utility model with reference to some embodiment, but without departing substantially from this reality
On the premise of novel scope and category, described embodiment can be carried out multiple modification and
Amendment.It will therefore be appreciated that this utility model is not limited to illustrated embodiment, but
There is the content by claims and the structure of equivalence thereof and full breadth that scheme limits.
Claims (11)
1. a self-retaining protector, it is characterised in that described self-retaining protector includes:
It is provided with the shell of binding post；
It is provided with the base plate of binding post；
It is configured to make the insulating part of insulation, described shell, the end between described shell and base plate
Plate and insulating part fit together to limit inner space；
Being encapsulated in the bimetal leaf in described inner space and PTC assembly, described bimetal leaf is solid
Determine to be provided with metal derby to shell and on described bimetal leaf；And
The stationary contact cooperated and movable contact, described stationary contact is fixed on base plate, described dynamic
Contact is arranged on bimetal leaf, and described movable contact is for the guarantor at described self-retaining protector
Separate with described stationary contact during protecting operation, and in the non-protected of described self-retaining protector
Contact with described stationary contact during operation,
Wherein, described metal derby abuts described PTC assembly and described PTC assembly abuts institute
State base plate.
Self-retaining protector the most according to claim 1, it is characterised in that described
PTC assembly includes PTC component and keeps component, and described holding component is arranged on base plate also
For keeping described PTC component.
Self-retaining protector the most according to claim 2, it is characterised in that described
PTC component is PTC-ceramic sheet.
Self-retaining protector the most according to claim 2, it is characterised in that described guarantor
Holding component is shell fragment.
Self-retaining protector the most according to claim 4, it is characterised in that described bullet
Sheet includes that maintaining part, described maintaining part are configured for keeping described PTC component to fix.
Self-retaining protector the most according to claim 5, it is characterised in that described bullet
Sheet includes the reinforcement being arranged on bottom it.
Self-retaining protector the most according to claim 6, it is characterised in that described guarantor
The portion of holding includes two clamping limbs being arranged on described reinforcement both sides, completes described PTC component
Assembling after, said two clamping limb fully opens so that described shell fragment not with described PTC
The side of component contacts.
8. according to the self-retaining protector described in any one in claim 5 to 7, its
Being characterised by, described maintaining part includes the holding flange being arranged on the side of described shell fragment, institute
State holding flange outward-dipping, so that described shell fragment not side with described PTC component connects
Touch.
9. according to the self-retaining protector described in any one in claim 5 to 7, its
Being characterised by, described shell fragment is made up of SUS301 stainless steel material, and its thickness is about 0.15 milli
Rice.
10. according to the self-retaining protector described in any one in claim 1 to 7,
It is characterized in that, on the bottom surface of one end that described movable contact is arranged on bimetal leaf, bimetal leaf
The end face of the other end be fixed to described shell and the bottom surface of the other end at described bimetal leaf
On described metal derby is set.
11. 1 kinds of motors, it is characterised in that can install on described motor and want according to right
Seek the self-retaining protector described in any one in 1 to 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620256293.4U CN205723339U (en) | 2016-03-30 | 2016-03-30 | Self-retaining protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620256293.4U CN205723339U (en) | 2016-03-30 | 2016-03-30 | Self-retaining protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205723339U true CN205723339U (en) | 2016-11-23 |
Family
ID=57311198
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620256293.4U Active CN205723339U (en) | 2016-03-30 | 2016-03-30 | Self-retaining protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205723339U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106952779A (en) * | 2017-05-12 | 2017-07-14 | 佛山市高明欧电子制造有限公司 | A kind of temperature control device of band PTC power-off restorations |
| CN107331577A (en) * | 2017-08-22 | 2017-11-07 | 江苏怡通控制***有限公司 | A kind of New temperature protector |
-
2016
- 2016-03-30 CN CN201620256293.4U patent/CN205723339U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106952779A (en) * | 2017-05-12 | 2017-07-14 | 佛山市高明欧电子制造有限公司 | A kind of temperature control device of band PTC power-off restorations |
| CN107331577A (en) * | 2017-08-22 | 2017-11-07 | 江苏怡通控制***有限公司 | A kind of New temperature protector |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |