CN208861911U - Self-retaining protector for motor - Google Patents
Self-retaining protector for motor Download PDFInfo
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- CN208861911U CN208861911U CN201820733017.1U CN201820733017U CN208861911U CN 208861911 U CN208861911 U CN 208861911U CN 201820733017 U CN201820733017 U CN 201820733017U CN 208861911 U CN208861911 U CN 208861911U
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- self
- motor
- protector
- movable contact
- retaining
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Abstract
The utility model discloses a kind of self-retaining protectors for motor comprising: shell is fixedly provided with stationary contact on shell；Guide plate equipped with guide post, shell and guide plate are hermetically fitted together to limit inner space；The disk of encapsulation in the interior space, is equipped with the movable contact that can be moved on disk, and the disk is configured to that movable contact is enable to move between on position and off position, in on-position, movable contact is in contact with each other with stationary contact, and in open position, movable contact is separated with stationary contact；And the PTC component of encapsulation in the interior space, the PTC component are configured to keep movable contact to be separated from each other with stationary contact after movable contact moves to open position from on-position.The utility model further relates to a kind of pump motor that can install the self-retaining protector.
Description
Technical field
The utility model relates to a kind of self-retaining protectors for motor.The utility model, which further relates to one kind, to pacify
Fill the pump motor of the self-retaining protector.
Background technique
Protector is a kind of motor guarantor that the rapid bending using disk when being more than protection temperature connects come disconnecting circuit
Protection unit.Disk usually by two layers or three layers of different alloy combination together, when there is electric current to pass through, disk can generate heat.Work as electricity
When machine works normally, the stationary contact on movable contact and protector housing on disk is in the closed state contacted with each other, so that
The operating circuit normally of motor.When the temperature of disk is due to the excessively high original of short circuit, current overload or environment temperature
When thus reaching protection temperature, since the thermal expansion coefficient of different alloys is different, disk is because rapid by thermogenetic internal stress
It is bent and protector is made to carry out protection operation, so that movable contact and stationary contact are separated to cut off the operating circuit of motor, to rise
To heat protective effect.Protector fits together in which should be close to machine winding with motor, accurately to perceive machine winding
Temperature change.
Currently, common protector is mainly self-recovering type protector on motor, such self-recovering type protector exists
Protection operation after, once the temperature of disk drops below reset temperature, protector will automatically reset, make electrical power from
And it works on.This self-recovering type protector can be such that the working power of motor is repeatedly switched on and off, and lead to security performance
It is poor.
Utility model content
In view of the above-mentioned drawbacks in the prior art, on the one hand, the utility model provides a kind of self-insurance for motor
Hold formula protector comprising:
Shell is fixedly provided with stationary contact on the housing；
Guide plate equipped with guide post, the shell and guide plate are hermetically fitted together to limit inner space；
The disk being encapsulated in the inner space is equipped with the movable contact that can be moved, the disk on the disk
It is configured to that the movable contact is enable to move between on position and off position, it is described dynamic in the on-position
Contact is in contact with each other with the stationary contact, and in the open position, the movable contact is separated with the stationary contact；And
The PTC component being encapsulated in the inner space, the PTC component are configured in the movable contact from described
On-position keeps the movable contact to be separated from each other with the stationary contact after moving to the open position.
In one embodiment of self-retaining protector, the disk is configured to make in the nominal situation of motor
The movable contact is in the on-position being in contact with each other with the stationary contact, and in the self-retaining protector because of electricity
There is unusual service condition and carries out making the movable contact be in the open position separated with the stationary contact when protection operation in machine.
Different from the self-recovering type protector in the prior art for motor, the self-retaining protector of the utility model
It can be realized the work that motor is kept by protector by the way that PTC component (including the component of positive temperature coefficient temperature-sensitive element) is added
Make the self-retaining function of circuit disconnection.For such self-retaining protector, it is necessary to manually disconnect power supply and wait until always
The disk of protector is cooled to lower than after reset temperature, and protector is just capable of resetting.Self-retaining protector will not make motor
Working power is repeatedly switched on and off, and security performance is preferable.
In one embodiment of self-retaining protector, the PTC component includes PTC component, clamping components and insulation
Component, the clamping components are configured to for the PTC component being clamped on the disk, and the insulating component is configured to use
With the insulated isolation clamping components in order to avoid being contacted with shell.By the clamping components, can conveniently and reliably install,
The PTC component is dismantled and kept, and can ensure the steady contact between disk and PTC component.
In one embodiment of self-retaining protector, the shell and guide plate are assembled by welding.
Thereby, it is possible to ensure the good sealing performance of self-retaining protector, self-retaining protector is enable to pass through up to
The pressure test of 2100psi, so that self-retaining protector be enable to be suitable for the working environment (example with stringent seal request
Working environment as high temperature and humidity locating for pump motor can be suitable for).
In one embodiment of self-retaining protector, the PTC component is PTC ceramics piece or film resistor.PTC pottery
Tile or film resistor are the resistor-type heater of positive temperature coefficient, and resistance value is increased as temperature is increased with geometry magnitude
Greatly, operating current also with resistance value raising and reduce.
In one embodiment of self-retaining protector, the cross-sectional area of the movable contact is in 2.9mm2More than.As a result,
Self-retaining protector can be made to meet the capacity requirement of 240V/50A or more.
In one embodiment of self-retaining protector, the self-retaining protector further includes heater element, described
Insulating component is further configured to the insulated isolation clamping components and heater element in order to avoid contacting with shell.
In one embodiment of self-retaining protector, the heater element is cross-sectional area in 2.9mm2Above hair
Heated filament, the cross-sectional area of the disk is in 0.8mm2More than, and the cross-sectional area of the guide post is in 2.2mm2More than.As a result, can
The short circuit current for enough making self-retaining protector bear 50A or more passes through.
In one embodiment of self-retaining protector, the insulating component is the collets made of PPS.
On the other hand, the utility model further relates to a kind of pump motor, can install on the pump motor above-mentioned
The self-retaining protector of type.
Detailed description of the invention
Consider the description of the following preferred embodiment to the utility model in conjunction with the accompanying drawings, the utility model it is each
Kind target, feature and advantage will become apparent.Attached drawing is only the exemplary diagram of the utility model, is not necessarily
It is drawn to scale.In the accompanying drawings, same appended drawing reference always shows same or similar component.
Fig. 1 is the overall schematic of self-retaining protector according to the present utility model；
Fig. 2 is the longitudinal sectional view of self-retaining protector according to the present utility model；
Fig. 3 is the transverse sectional view of self-retaining protector according to the present utility model；
Fig. 4 is the schematic diagram of internal structure of self-retaining protector according to the present utility model, and clear for diagram rises
See, removes the shell of self-retaining protector in the figure；
Fig. 5 is the decomposition diagram of self-retaining protector according to the present utility model；
Fig. 6 is for illustrating showing for mounting means of the PTC component in self-retaining protector according to the present utility model
It is intended to；
Fig. 7 is the schematic diagram of the shell of self-retaining protector according to the present utility model；And
Fig. 8-9 is the working principle explanatory diagram of self-retaining protector according to the present utility model.
Specific embodiment
The description disclosure that hereinafter reference will be made to the drawings, attached drawing therein show preferred embodiment of the present disclosure.However it should
Understand, the disclosure can show in a number of different manners, it is not limited to embodiment as described below；It is true
On, embodiment as described below is intended to make the disclosure of the disclosure more complete, and absolutely proves to those skilled in the art
The protection scope of the disclosure.It is to be further understood that embodiment disclosed herein can be combined in various ways, to mention
For more additional embodiments.
It should be understood that in all the appended drawings, identical appended drawing reference indicates identical element.It in the accompanying drawings, is clear
The size of Chu Qijian, certain features can be deformed.
Unless otherwise stated, the term as used herein (including technical terms and scientific terms) should have this practical new
The those of ordinary skill of technical field involved in type is it can be generally understood that the meaning arrived.Unless otherwise stated, illustrating
Term " includes " used in book and claims and "comprising" should be construed as open meaning, that is to say, that " packet
Include " and "comprising" should be construed as it is synonymous with term " including at least " or " including at least ".
Unless otherwise stated, term " on " used in the utility model, "lower", "top", "bottom" etc. are protections
Relative bearing of device in the state of as shown in the figure.
It should be understood that the terminology in specification is only used for description specific embodiment, it is no intended to limit the disclosure.
For the sake of concise and/or is clear, well known function or structure can be no longer described in detail.
In view of the above-mentioned drawbacks in the prior art, the utility model provides a kind of self-retaining protector.Referring to Fig.1-
7, one embodiment of the self-retaining protector 1 according to the present utility model for motor is shown.
Fig. 1 is the overall schematic of the self-retaining protector 1 for motor.As shown in Figure 1, protector 1 includes shell 2
With guide plate 3, and shell 2 and guide plate 3 are hermetically fitted together to limit inner space.Preferably, shell 2 and guide plate 3 are logical
The mode welded together at welding surface W is crossed to be assembled.Thereby, it is possible to ensure the good close of self-retaining protector 1
Sealing property enables self-retaining protector 1 by being up to the pressure test of 2100psi, to enable self-retaining protector 1
Enough working environments being suitable for stringent seal request (such as can be suitable for the work of high temperature and humidity locating for pump motor
Environment).
Further, as shown in Figure 2 and Figure 7, stationary contact 5 is fixedly provided on shell 2.In addition, such as Fig. 2 and Fig. 4-6
It is shown, integrally provided with guide post 4 on guide plate 3, and guide post 4 be disposed across guide plate 3 extend to the inside of protector 1 with
Realization is electrically connected with internal component.
As shown in figures 2-6, disk 6, dish are packaged in the inner space defined by the shell 2 and guide plate 3 as protector 1
Together by two layers or three layers of different alloy combination, when there is electric current to pass through, disk 6 can generate heat piece 6.Wherein, disk 6 is being just
Face is the biggish surface of thermal expansion coefficient, and the back side of disk 6 is the lesser surface of thermal expansion coefficient.
As shown in Fig. 2 and Fig. 4-6, the movable contact 7 that can be moved, the dish are equipped in a positive end for disk 6
Piece 6 is configured to that movable contact 7 is enable to move between on position and off position.In the on-position, movable contact 7
It is in contact with each other with stationary contact 5；In the open position, movable contact 7 is separated with stationary contact 5.
Preferably, the disk 6 of protector 1 can be configured to make in the nominal situation of motor movable contact 7 and stationary contact 5 that
This contact, and carry out making movable contact 7 from stationary contact when protection operates because motor unusual service condition occurs in self-retaining protector 1
5 separation of point.
Preferably, the cross-sectional area of movable contact 7 is in 2.9mm2More than.Thereby, it is possible to meet self-retaining protector 1
The capacity requirement of 240V/50A or more.
In addition, it is also packaged with PTC component in the inner space defined by the shell 2 and guide plate 3 as protector 1, it is described
PTC component is configured to keep movable contact 7 to be separated from each other with stationary contact 5 after the protection operation of self-retaining protector 1.
As shown in figures 2-6, PTC component includes PTC component 8, clamping components 9 and insulating component 10.Wherein, clamping components 9 pass through elastic slice
Structure is connected with shell 2, and is configured to for PTC component 8 to be clamped to another positive end of disk 6
Place.Insulating component 10, which is configured to be connected together at the back side of disk 6 with clamping components 9, is isolated clamping structure so as to insulated
Part 9 with shell 2 in order to avoid be in contact, and can ensure the accurate positionin of clamping components 9.Preferably, insulating component 10 is by PPS
Collets made of (i.e. engineering plastics polyphenylene sulfide).Setting in this way can conveniently and reliably be installed, dismantle and be protected
PTC component 8 is held, and can ensure the steady contact between disk 6 and PTC component.
Preferably, PTC component 8 is PTC ceramics piece or film resistor, and the PTC ceramics piece or film resistor are positive temperature
The resistor-type heater of coefficient is spent, resistance value is increased with temperature with the increase of geometry magnitude, and operating current is also with resistance
The raising of value and reduce.
In addition, referring to fig. 2, Fig. 4 and Fig. 6, self-retaining protector 1 may include heater element 11, and heater element
11 are connected by cushion block with PTC component 8.Insulating component 10 may further be configured to insulated isolation clamping components 9 and hair
Thermal element 11 with shell 2 in order to avoid be in contact.As the add ons for realizing excess current protective function, heater element 11 is can
Match part.Preferably, heater element 11 is cross-sectional area in 2.9mm2Above heating wire, the cross-sectional area of disk 6 is in 0.8mm2
More than, and the cross-sectional area of guide post 4 is in 2.2mm2More than.Thereby, it is possible to so that self-retaining protector 1 is born 50A's or more
Short circuit current passes through.
The self-retaining protector 1 of the utility model realizes self-retaining function, basic work by the way that PTC component is added
It is as shown in Figure 8 and Figure 9 to make principle.Referring to Fig. 9, by taking pump motor as an example, in the operating circuit of motor, including ac/dc
Power supply, pump motor, starter and self-retaining protector 1.It will be appreciated by those skilled in the art that the motor can be such as figure
Pump motor shown in 9 is also possible to motor used in other electrical equipments.As shown in figure 8, self-retaining protector 1
Operating circuit includes guide post 4, the stationary contact 5 on shell 2, disk 6 and movable contact 7 on disk 6, PTC component and optional
High impedance heater element 11.
As shown in Figure 8 and Figure 9, when pump motor operates normally, self-retaining protector 1 is in normal operating conditions,
Stationary contact 5 and movable contact 7 remain closed, and the both ends of PTC component or heater element 11 are shorted at this time, not by access water pump electricity
The operating circuit of machine.
When self-retaining protector 1 encounters short circuit, current overload or environment temperature high unusual service condition excessively, dish
Piece 6 makes protector 1 carry out protection operation due to being bent rapidly by thermogenetic internal stress, so that stationary contact 5 and movable contact 7 separate
To cut off the operating circuit of pump motor.At this point, 11 access circuit of PTC component or heater element, starts to generate heat.According to setting
The heat that fixed parameter request, PTC component or heater element 11 are issued is able to maintain stationary contact 5 and movable contact 7 is located always
In isolated off-state, until power supply is cut-off and waits until that the disk 6 of protector 1 is cooled to lower than reset temperature,
Protector 1 is just capable of resetting.In this way, the protector 1 of the utility model is achieved that self-retaining function, so as to promote motor
Security performance.Motor will not start repeatedly under charged state as a result,.Only after cutting off the power, debugging, motor is
It can restore to work normally.Therefore, the self-retaining protector 1 of the utility model will not be such that the working power of motor repeatedly connects
And cutting, provide better safety and stability.
On the other hand, the utility model additionally provides a kind of pump motor, can install on the pump motor
State the self-retaining protector 1 of type.Self-retaining protector 1 assembles in which should be close to the winding of pump motor with pump motor
Together, accurately to perceive the temperature change of pump motor winding.Thereby, it is possible to improve the security performance of pump motor.
In addition, it will be appreciated by those skilled in the art that self-retaining protector disclosed in the utility model can not only
Suitable for pump motor, and it is readily applicable to motor (such as fruit juice mixer, soy bean milk making machine, blender, the suction of any other type
Motor used in the electrical equipments such as dirt device, electric tool).
Although describing the disclosure referring to exemplary embodiment, it should be appreciated to those skilled in the art that at this
Do not departed from matter the exemplary embodiment of the disclosure can be carried out in the case where spirit and scope of the present disclosure a variety of modifications and
Modification.Therefore, all modifications and variations are all contained in the protection scope for the disclosure being defined by the following claims.This public affairs
The protection scope opened is defined by the appended claims, and the equivalent program of these claims is also included.
Claims (10)
1. a kind of self-retaining protector for motor, which is characterized in that the self-retaining protector includes:
Shell is fixedly provided with stationary contact on the housing；
Guide plate equipped with guide post, the shell and guide plate are hermetically fitted together to limit inner space；
The disk being encapsulated in the inner space is equipped with the movable contact that can be moved, the disk construction on the disk
At to enable the movable contact to move between on position and off position, in the on-position, the movable contact
It is in contact with each other with the stationary contact, in the open position, the movable contact is separated with the stationary contact；And
The PTC component being encapsulated in the inner space, the PTC component are configured in the movable contact from the connection
Position keeps the movable contact to be separated from each other with the stationary contact after moving to the open position.
2. the self-retaining protector according to claim 1 for motor, which is characterized in that the disk is configured to use
The on-position being in contact with each other with being in the movable contact in the nominal situation of motor with the stationary contact, and
The self-retaining protector because motor unusual service condition occurs carry out protection operation when make the movable contact be in it is described quiet
The open position of contact separation.
3. the self-retaining protector according to claim 2 for motor, which is characterized in that the PTC component includes
PTC component, clamping components and insulating component, the clamping components are configured to the PTC component being clamped in the disk
On, the insulating component is configured to the insulated isolation clamping components in order to avoid contacting with the shell.
4. the self-retaining protector according to claim 3 for motor, which is characterized in that the shell and guide plate are logical
The mode for crossing welding is assembled.
5. the self-retaining protector according to claim 4 for motor, which is characterized in that the PTC component is PTC
Potsherd or film resistor.
6. according to claim 1 to the self-retaining protector for being used for motor described in any one in 5, which is characterized in that
The cross-sectional area of the movable contact is in 2.9mm2More than.
7. being used for the self-retaining protector of motor according to any one in claim 3 to 5, which is characterized in that
The self-retaining protector further includes heater element, and the insulating component is further configured to the insulated isolation folder
Component and heater element are held in order to avoid contacting with the shell.
8. the self-retaining protector according to claim 7 for motor, which is characterized in that the heater element is cross
Sectional area is in 2.9mm2Above heating wire, the cross-sectional area of the disk is in 0.8mm2More than, and the cross section of the guide post
Product is in 2.2mm2More than.
9. being used for the self-retaining protector of motor according to any one in claim 3 to 5, which is characterized in that
The insulating component is the collets made of PPS.
10. a kind of pump motor, which is characterized in that can be installed on the pump motor according to claim 1 to appointing in 9
The self-retaining protector of motor is used for described in meaning one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820733017.1U CN208861911U (en) | 2018-05-16 | 2018-05-16 | Self-retaining protector for motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820733017.1U CN208861911U (en) | 2018-05-16 | 2018-05-16 | Self-retaining protector for motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208861911U true CN208861911U (en) | 2019-05-14 |
Family
ID=66411084
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820733017.1U Active CN208861911U (en) | 2018-05-16 | 2018-05-16 | Self-retaining protector for motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208861911U (en) |
-
2018
- 2018-05-16 CN CN201820733017.1U patent/CN208861911U/en active Active
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