CN217983203U - Oil flow relay for preventing micro switch overload - Google Patents
Oil flow relay for preventing micro switch overload Download PDFInfo
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- CN217983203U CN217983203U CN202221851909.4U CN202221851909U CN217983203U CN 217983203 U CN217983203 U CN 217983203U CN 202221851909 U CN202221851909 U CN 202221851909U CN 217983203 U CN217983203 U CN 217983203U
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- microswitch
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Abstract
The utility model relates to an oil flow relay for preventing micro-gap switch from overloading, a transmission part is arranged at the lower half part inside a shell, and a transmission shaft arranged in the transmission part extends out of the shell and is connected with a movable plate; the upper half part in the shell is provided with an indicating part assembly, and a magnetic suction part assembly arranged at the top of the transmission part assembly and a magnetic suction part assembly arranged at the bottom of the indicating part assembly are arranged; a support is arranged in the indicating part, and a pointer shaft in the indicating part penetrates out of the upper part of the support and is connected with a pointer; a cam is coaxially arranged on the pointer shaft, a jacking screw is arranged on the outer circumference of the cam, and the tail end of the jacking screw radially penetrates through the cam and jacks the outer circumference of the pointer shaft; the top surface of the bracket is provided with a microswitch, and the contact of the microswitch is contacted with the excircle surface of the cam. This oil flow relay adopts the cam structure for oil flow relay's micro-gap switch's contact is located its open position all the time, can not make micro-gap switch's contact be in extreme compression position for a long time at the operation in-process, has reduced because of excessive compression leads to micro-gap switch's inefficacy.
Description
Technical Field
The utility model relates to a prevent overload oil stream relay of micro-gap switch belongs to the technical field of oil stream relay.
Background
As is well known, the general oil flow relay adopts the working principle that a flag lever shaft is arranged to drive a pointer to rotate through a magnetic coupling structure, and is used for monitoring the oil flow change condition in a cooler for a transformer.
After the oil pump is started, oil flow is generated in the electric appliance connecting pipe, when the oil flow reaches a certain action oil flow, the movable plate in the relay rotates, the indicating part synchronously rotates through the magnetic couple force, the signal contact is connected, a normal signal is sent out, and when the oil flow is reduced to a certain value, the movable plate returns to send out a fault signal.
The disadvantage of this kind of oil flow relay is, when the oil flow reaches a definite value, the movable plate in the relay rotates the action, make the instruction part rotate through the magnetic couple power, when the oil flow in the pipeline transships promptly when the oil flow is greater than the specified value, oil flow relay also can be normal signals, but oil flow relay's micro-gap switch opens when reaching the action flow, micro-gap switch's gyro wheel can continue to rotate along with the rotation of axis of rotation when exceeding oil flow, long-term operation can make oil flow relay's micro-gap switch's spring contact be in the extreme compression position like this, reset to micro-gap switch has very big influence, can reduce micro-gap switch's life and sensitivity.
Disclosure of Invention
The to-be-solved technical problem of the utility model is to provide a prevent micro-gap switch overloaded oil flow relay, this oil flow relay adopts the cam structure for oil flow relay's micro-gap switch's contact is located its position of opening all the time, can not make micro-gap switch's contact be in the extreme compression position for a long time at the operation in-process, has reduced because of excessive compression leads to micro-gap switch's inefficacy.
For solving the above problems, the specific technical scheme of the utility model is as follows: an oil flow relay for preventing the overload of a microswitch is characterized in that a transmission part is arranged at the lower half part in a shell, and a transmission shaft arranged in the transmission part extends out of the shell and is connected with a movable plate; the upper half part in the shell is provided with an indicating part, and the transmission part is provided with a magnetic part arranged at the top and a magnetic part arranged at the bottom of the indicating part; a support is arranged in the indicating part assembly, and a pointer shaft in the indicating part assembly penetrates out of the upper part of the support and is connected with a pointer; a cam is coaxially arranged on the pointer shaft, a jacking screw is arranged on the outer circumference of the cam, and the tail end of the jacking screw radially penetrates through the cam and jacks the outer circumference of the pointer shaft; the top surface of the bracket is provided with a microswitch, and the contact of the microswitch is contacted with the excircle surface of the cam.
The cam is provided with two working surfaces, one working surface is a working arc surface, the other working surface is an overload plane, and a triggering arc is arranged at the joint of the working arc surface and the overload plane; the working cambered surface is contacted with a contact of the micro switch, and the micro switch is in an un-triggered state; the trigger arc surface is contacted with a contact of the microswitch, and the microswitch is in a trigger state; the overload plane is contacted with the contact of the microswitch; the elastic sheet of the microswitch is in a state of releasing elasticity after being triggered.
The rectangle of each point on the overload plane from the central axis is smaller than the radius of the working cambered surface.
The utility model provides a prevent micro-gap switch overloaded oil flow relay triggers micro-gap switch through the cam, leads to the deformation that utilizes the cam after triggering micro-gap switch, makes micro-gap switch's shell fragment elasticity can release to prevented that micro-gap switch is in limit compression state for a long time, improved micro-gap switch's life.
Drawings
Fig. 1 is an overall structural schematic diagram of an oil flow relay for preventing overload of a microswitch.
Fig. 2 is a schematic structural view of the indicating part.
FIG. 3 is a diagram showing the relationship between the rotational state of the cam and the contact point of the microswitch.
Detailed Description
As shown in fig. 1 and fig. 2, in an oil flow relay for preventing overload of a microswitch, a transmission part 3 is arranged at the lower half part in a shell 4, and a transmission shaft 2 of the transmission part 3 extends out of the shell 4 to be connected with a movable plate 1; an indicating part device 5 is arranged at the upper half part in the shell 4, and a magnetic part device arranged at the top of the transmission part device 3 and a magnetic part device arranged at the bottom of the indicating part device 5 are arranged; a support 12 is arranged in the indicating part device 5, and a pointer shaft 16 in the indicating part device 5 penetrates out of the upper part of the support 12 and is connected with a pointer; a cam 15 is coaxially arranged on the pointer shaft 16, a jacking screw 17 is arranged on the outer circumference of the cam 15, and the tail end of the jacking screw 17 radially penetrates through the cam 15 to be jacked with the outer circumference of the pointer shaft 16; a micro switch 13 is arranged on the top surface of the bracket 12, and the contact of the micro switch 13 is contacted with the outer circular surface of the cam 15.
The cam 15 is provided with two working surfaces, one working surface is a working arc surface 21, the other working surface is an overload plane 22, and a triggering arc 23 is arranged at the joint of the working arc surface 21 and the overload plane 22; the working arc surface 21 is contacted with a contact of the micro switch 13, and the micro switch 13 is in an un-triggered state; the surface of the trigger arc 23 is contacted with a contact of the microswitch 13, and the microswitch 13 is in a trigger state; the overload flat surface 22 contacts with the contact of the microswitch 13; the spring plate of the microswitch 13 is in a state of releasing the elastic force after being triggered.
The rectangle of each point on the overload plane 22 from the central axis is smaller than the radius of the working cambered surface 21, so that the elastic force of the elastic sheet of the microswitch 13 is released.
As shown in fig. 3, the operation process of the cam 15 and the micro switch is as follows: the working arc 21 is the pre-stroke of the microswitch of the oil flow relay, swings in the range, and can not start the microswitch to send out signals, the triggering arc 23 at the joint of the working arc 21 and the overload plane 22 is the working stroke of the oil flow relay, namely, when the contact of the microswitch runs to the position of the triggering arc 23 along the working arc 21, the microswitch starts to act, meanwhile, the contact of the microswitch is compressed to the lowest position, when the contact of the microswitch rotates to enter the overload plane 22 through the triggering arc along with the continuous rotation of the movable plate 1, the microswitch of the oil flow relay enters the range of the over-stroke, and the position of the microswitch can quickly leave the limit compression position and enter the delay protection position.
Claims (3)
1. An oil flow relay for preventing overload of a microswitch is characterized in that: a transmission part (3) is arranged at the lower half part inside the shell (4), and a transmission shaft (2) of the transmission part (3) extends out of the shell (4) to be connected with the movable plate (1); an indicating part device (5) is arranged at the upper half part in the shell (4), and a magnetic part device arranged at the top of the transmission part device (3) and a magnetic part device arranged at the bottom of the indicating part device (5); a support (12) is arranged in the indicating part device (5), and a pointer shaft (16) in the indicating part device (5) penetrates out of the upper part of the support (12) and is connected with a pointer; a cam (15) is coaxially arranged on the pointer shaft (16), a jacking screw (17) is arranged on the outer circumference of the cam (15), and the tail end of the jacking screw (17) radially penetrates through the cam (15) and is jacked with the outer circumference of the pointer shaft (16); a microswitch (13) is arranged on the top surface of the bracket (12), and a contact of the microswitch (13) is in contact with the outer circular surface of the cam (15).
2. The oil flow relay for preventing the micro switch from being overloaded according to claim 1, wherein: the cam (15) is provided with two working surfaces, one working surface is a working arc surface (21), the other working surface is an overload plane (22), and a triggering arc (23) is arranged at the joint of the working arc surface (21) and the overload plane (22); the working cambered surface (21) is contacted with a contact of the microswitch (13), and the microswitch (13) is in an un-triggered state; the surface of the trigger arc (23) is contacted with a contact of the microswitch (13), and the microswitch (13) is in a trigger state; the overload plane (22) is contacted with the contact of the microswitch (13); the elastic sheet of the microswitch (13) is in a state of releasing elastic force after being triggered.
3. The oil flow relay for preventing the micro switch from being overloaded according to claim 2, wherein: the rectangle of each point on the overload plane (22) from the central axis is smaller than the radius of the working cambered surface (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221851909.4U CN217983203U (en) | 2022-07-19 | 2022-07-19 | Oil flow relay for preventing micro switch overload |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221851909.4U CN217983203U (en) | 2022-07-19 | 2022-07-19 | Oil flow relay for preventing micro switch overload |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217983203U true CN217983203U (en) | 2022-12-06 |
Family
ID=84280330
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221851909.4U Active CN217983203U (en) | 2022-07-19 | 2022-07-19 | Oil flow relay for preventing micro switch overload |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217983203U (en) |
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2022
- 2022-07-19 CN CN202221851909.4U patent/CN217983203U/en active Active
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