CN2364544Y

CN2364544Y - Temp.-controlled switch

Info

Publication number: CN2364544Y
Application number: CN 98242263
Authority: CN
Inventors: 向传国; 李可瑞
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-11-12
Filing date: 1998-11-12
Publication date: 2000-02-16
Anticipated expiration: 2008-11-12

Abstract

The utility model relates to a temperature control switch, which is suitable for the automatic control of a cooling fan of a car, etc. The utility model belongs to an automobile accessory. The temperature control switch is mainly composed of a switch, an ejector rod and a temperature sensor, wherein, the switch is positioned on the upper part of the temperature control switch, the temperature sensor is positioned on the lower part, and the switch and the temperature sensor are riveted integrally. The ejector rod is composed of an insulation head, a metal rod and a rubber plug which are connected in turn, and in addition, temperature sensing paraffin in the temperature control switch senses temperature on a shaft line between the switch and the temperature sensor, with volume change generated, the volume change is converted to displacement via the ejector rod and the switch is pushed to operate. The design of the utility model has the advantages of long service life, high reliability, low cost and small volume.

Description

Temperature detect switch (TDS)

The utility model belongs to a kind of temperature automatic control switch, is specially adapted to the automatic control of car cooling fan.

Known temperature detect switch (TDS): as bimetal leaf or and the wax formula, forms by switch, push rod, temperature detector three parts, during work, the connection of electrode, disconnection, bimetal leaf or by wherein bimetal leaf convex-concave deformation promotion; The wax formula promotes by paraffin temperature-sensitive expansion wherein.And all there is the deficiency that complex structure, volume are big, the life-span is short in above-mentioned two kinds of switches.

It is little that the purpose of this utility model provides a kind of volume, dependable performance, the temperature detect switch (TDS) that the life-span is long.

Its technical scheme is: temperature detect switch (TDS) comprises: switch, temperature detector, wherein: the push rod that bar, plug are formed is arranged between switch and the temperature detector by the insulation head.

Linkage unit in the switch in the above-mentioned temperature detect switch (TDS) is made up of springboard, spring, seesaw, and wherein the springboard that supports in " V " of positive plate shape groove is connected with an end of seesaw through spring, and the other end collocation of seesaw is on the insulation head.

Housing in the temperature detector of above-mentioned temperature detect switch (TDS) and obturating cup, the seal interface of lid are the conical surface.The utility model is because with the structure and the connected mode of push rod, and the obturating cup lid improves with the seal interface of housing, realized simple in structure, volume is little, the purpose of dependable performance, long service life.

Routine accompanying drawing has been described an enforcement of the present utility model down.

Accompanying drawing 1 is the cutaway view by axis.

As shown in Figure 1, temperature detect switch (TDS) mainly is made up of switch (1), push rod (2) and temperature detector (3) three big parts.Switch (1) by riveting on temperature detector (3), push rod (2) is contained in the endoporus of lid (31), and can slide in endoporus, and the one end heads on seesaw (19), the other end is being pressed obturating cup (32), and temperature detector (3) is transmitted by push rod (2) with " signal " of switch (1).

Switch (1) by pedestal (11), positive step (12), cathode plate (13), guide vane end stop (14), springboard (15), extension spring (16), moving contact (17), fixed contact (18), and seesaw (19) form, pedestal (11) is the matrix and the skeleton of switch, is embedded with positive plate (1 2), minus plate (13) on it; Positive plate (12) is the input of switch, there are two rotation axiss its underpart, a rotating shaft that is springboard (15) along " V " type groove, one is seesaw (19) by the rotating shaft of " convex-concave " shape mode (is that positive plate is " protruding " shape, seesaw has the flat hole of a rectangle to cooperate rotation with it), and a middle window in addition is the activity space of extension spring (16); Minus plate (13) is the output of switch, and the riveting of one end has a fixed contact (18), and controls the lower dead center that springboard (15) is beated; Guide vane end stop (14) is fixed on the pedestal (11), and its function is the top dead centre that control springboard (15) is beated; Springboard (15) one's duty is the bridge that electric current passes through, the riveting of one end has other car end two legs of moving contact (17) to be pressed in " V " shape groove of positive plate (12), have between its two leg " one ", can supply extension spring (16) activity, extension spring (16) one ends haul springboard (15), and the other end hauls seesaw (19), because its effect, make between positive plate (12) and the springboard, produce certain normal pressure between moving contact (17) and the fixed contact (18), reduced contact resistance; The flat hole of seesaw (19) intermediate rectangular can be inserted in positive plate (32) one ends, play the position rotating effect, its characteristics of motion is identical with leverage, its end links to each other with extension spring (16), the other end is pressed on the push rod (2), the active force between transmission push rod (2) and the extension spring (16) and the interaction characteristics of motion of active force, springboard (15), extension spring (16) and seesaw (19) can force switch contact can manage closed or disconnection of moment in fact.

Push rod (2) is made up of insulation head (21), Metallic rod (22), rubber stopper (23), and insulation head (21) cuts off current direction housing (33), and it is fixed on the Metallic rod (32); Metallic rod (32) play the guiding role; rubber stopper (23) plays protection obturating cup (32); and has the secondary seal function; can avoid leaking the rapid decay generation that wax produces because of obturating cup (32) breaks; thereby avoid causing the cylinder cap distortion because of engine is sharply overheated, engine is scrapped phenomenon and is taken place.

Temperature detector (3) lid (31), obturating cup (32), housing (33) and temperature-sensitive paraffin (34) are formed.After lid (31) is clenched, compress obturating cup (32), guarantee reliable close paraffin, small garden hole is the movable passage of push rod (2) in the middle of it; Obturating cup (32) is a rubber part in addition, and it is enclosed in temperature-sensitive paraffin (34) in the cavity volume, and the change in volume of temperature-sensitive paraffin (34) is passed; Housing (33) is externally finished connection, and transferring heat energy internally is matrixes of installing and hold various other parts; Temperature-sensitive paraffin (34) is mixture, and being characterized in can be gradually by the solid-state liquid state that becomes in a temperature range at certain, and volume increases gradually, and is reversible than change procedure, and the phase transition temperature of temperature-sensitive paraffin (34) can will be selected according to automobile.

The utility model design temperature detect switch (TDS) course of work is as follows:

In non operating state, inner each the part present position of temperature detect switch (TDS) belongs to common disconnect type switch as shown in Figure 1.

After housing (33) bottom is heated to uniform temperature, be sealed in the interior temperature-sensitive paraffin (34) of cavity volume by the solid-state liquid state that becomes, volume expands gradually, in cavity volume, produce and high pressure, force rubber seal bowl (32) outwards to stretch along lid (31) endoporus, and outwards slippage of promotion push rod (2), the reaction force of push rod (2) clothes extension springs (16) pushes away a seesaw (19) and rotate, and an end of drive extension spring (16) is made garden Zhou Yundong, when the center line of the axis of extension spring (16) and springboard (15) fashionable, springboard (15) moment redirect, moving contact (17) and fixed contact (18) closure, at this moment switch is in closure state, otherwise, switch open.

Claims

1, a kind of temperature detect switch (TDS) comprises: switch (1), temperature detector (3) is characterized in that: connected the push rod of being made up of insulation head (21), a bar (22), plug (23) (2) between switch (1) and the temperature detector (3).

2, according to the described switch of claim 1, it is characterized in that: the linkage part in the switch (1), form by springboard (15), spring (16), seesaw (19), the springboard (15) that in " V " of positive plate (12) shape groove, supports wherein, be connected through the end of spring (16) with seesaw (19), the other end of seesaw (19) rides on the insulation head (21).

3, according to the described switch of claim 1, it is characterized in that: the housing (33) in the temperature detector (3) is the conical surface with the seal interface of obturating cup (32), lid (31).