JPS63246697A - Temperature-sensitive constant load spring - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention: "Industrial Field of Application" This invention is a spring having a constant load and a constant output. It relates to a spring that has a constant load and constant output at a temperature that increases or decreases due to a difference in rate and changes at that temperature.

``Prior Art'' Conventionally, as shown in FIG. 8, a temperature-sensitive spring 19 using a bimetal or the like used in a thermometer is a non-contact spiral spring, and the number of turns of the spring changes due to changes in temperature. (It has the disadvantage that it has poor spring properties and easily changes its shape plastically due to external force, making it unusable.)

"Problems to be Solved by the Invention" The present invention solves the above-mentioned drawbacks and is a spring with constant load and constant output.As the temperature changes, the load P and output T are compounded in proportion to the temperature difference. The purpose is to increase or decrease depending on the difference in the thermal expansion coefficient of the band, and to have a constant load and constant output at the temperature after the change.

Means for Solving the r Problem (a) A metal band 1 having spring properties and a metal band 2 having a low coefficient of thermal expansion are combined into one composite band.

(b) This composite band is subjected to plastic working so that it has a constant or stepwise radius of curvature Rn.

The present invention has undergone the above processing.

"Function" As shown in Fig. 9, a known constant force spring 1
5 is a certain radius of curvature Rn in the length direction of the metal strip having spring properties, as shown in FIG.
As shown in b), constant load and constant output or different loads and different outputs are produced by performing plastic working to have a stepwise radius of curvature Rn. The load is expressed by one equation.

P=E −b, t'/26°4-Rn2...<1
Formula) % Formula % Width of the metal band t: Thickness of the metal band Rn: Width b of the metal band in a one-dimensional metal band that is not a complex radius of curvature band after plastic working
- Since the thickness t is constant, the radius of curvature Rn controls the load P. Incidentally, since the radius of curvature Rn is maintained semi-permanently in the known constant load spring 15, the load P changes due to temperature changes, assuming that the longitudinal elastic modulus E is constant up to about 150°C. do not.

The temperature-sensitive constant force springs 3 and 4 of the present invention are made by plastic processing a composite band made of a metal band 1 having spring properties and a metal band 2 having a low coefficient of thermal expansion so as to have a constant or stepwise radius of curvature Rn. This is what I did.

Therefore, as shown in No. 6 [3], when a composite band consisting of a metal band l having spring properties and a metal band 2 having a low coefficient of thermal expansion is fixed to a surface plate and heated, the metal band 1 having spring properties will The relationship between the increase in length X due to thermal expansion and the increase y in length due to thermal expansion of a metal band with a low coefficient of thermal expansion is x)y, and the composite band is A
swerve in the direction.

When the temperature-sensitive constant force spring 3 having the radius of curvature Rn as shown in FIG. 7(a) is heated, the seventh
As shown in the figure (b), the radius of curvature Rn becomes smaller.

Therefore, since the value of the radius of curvature Rn shown in equation 1 has become smaller, the load P is proportional to 1/2 of the radius of curvature Rn, so the load P
becomes even larger.

As shown in FIG. 1, a temperature range responsive constant force spring 3 in which a metal band 2 with a low coefficient of thermal expansion is plastically worked so as to be on the inside of the curvature, has a springy property as the temperature increases. A
Since the increase in length due to B tension is larger than the increase in length due to thermal expansion of a metal band with a low coefficient of thermal expansion, the radius of curvature Rn becomes small, and the load P becomes thick (as shown in equation 1).

When the temperature decreases, the radius of curvature Rn increases and the load P decreases. However, since the radius of curvature Rn at each temperature remains unchanged, the load P becomes a constant load at that temperature.

In addition, as shown in FIG. 2, the temperature-sensitive constant force spring 4, which is made by plastically working the metal 2 with a low coefficient of thermal expansion so that it is on the outside of the curvature, has a radius of curvature Rn that increases as the temperature rises, so the load P becomes smaller, and when the temperature decreases, the radius of curvature Rn becomes smaller, so the load P becomes larger.

However, in this case as well, the radius of curvature R for each temperature is
Since n remains unchanged, the load P is a constant load.

"Application example" The winding drum 5 and the weight 6 shown in FIG. 3 are connected with a string 7, and the winding drum 5 and the large diameter drum 10 are
are connected by a rotating shaft 8, and a temperature-sensitive constant force spring 3 is provided on a small drum 11 with the direction of curvature maintained. Then, one end of the temperature-sensitive constant force spring 3 protruding outside is connected to the drum 10 having a large diameter so as to be wound against the curvature. In this case, the load P becomes even larger as shown in equation 2. Further, the output T is expressed by the following three equations.

P=E-b・t3t (1/Rn)+ (1/R2) l ”/24...(2 formula)% formula%) < 1/Rff) 1 2/2 4 ・ ・
(3) T: Output (torque) P: Load E: Modulus of longitudinal elasticity b = Width of two metal bands t: Thickness of metal band R3: Diameter of large drum Rn
: Small diameter of the drum and radius of curvature of the metal strip after plastic working At this time, it is assumed that the rotational output generated by the weight 6 and the output T of the temperature-sensitive constant force spring 3 are balanced at a certain temperature. When the temperature rises, the temperature-sensitive constant-load spring 3 has the metal strip 2 with a low coefficient of thermal expansion plastically worked to be on the inside of the curvature, so the radius of curvature Rn becomes smaller and the load P/output T is increased, the drum 10 with a large diameter begins to rotate clockwise, and the weight 6 is raised.

On the other hand, if a temperature-sensitive constant force spring 4 in which the metal band 2 with a low coefficient of thermal expansion is plastically worked so as to be placed on the outside of the curvature, the radius of curvature Rn increases as the temperature rises, causing the load P and output T to increase. becomes smaller, the drum 10 with a larger diameter begins to rotate counterclockwise, and the weight 6 descends.

Figure 4 shows a temperature-responsive constant force spring 3 in which the metal strip 2 with a low coefficient of thermal expansion is plastically worked so that it is on the inside of the curvature, and a temperature range responsive constant load spring 3 in which the metal band 2 with a low coefficient of thermal expansion is plastically worked so that it is on the outside of the curvature. As an example of a mechanism combining sensitive constant force springs 4, it is assumed that the temperature sensitive constant force spring 3 is used in the upper part and the temperature sensitive constant force spring 4 is used in the lower part. And a certain temperature T'C
Assuming that these two types of spring outputs T are balanced and the rotating shaft 8 is stationary, as the temperature rises by ΔT°C, the radius of curvature Rn of the temperature-sensitive constant force spring 3 tends to become smaller, so the radius In other words, the force A that tries to rotate the rotating shaft 8 clockwise is reduced by the diameter of the lower part because the radius of curvature Rn of the temperature-sensitive constant force spring 4 increases. The rotation shaft 8 rotates clockwise because it becomes larger than the force B that rotates the rotation shaft 8 counterclockwise in order to rewind it onto the small drum 11.

Further, when the temperature drops from T"C by ΔT"C, the relationship between A and B becomes A<B, and the rotating shaft 8 rotates counterclockwise.

Conversely, if the temperature-sensitive constant force spring 3 is provided at the bottom and the temperature-sensitive constant force spring 4 is provided at the top, when the temperature rises, the rotating shaft 8 rotates counterclockwise, contrary to the above, and when the temperature falls, the rotating shaft 8 rotates counterclockwise. 8 rotates clockwise.

In this way, the rotating mechanism rotates to the right or left depending on the temperature difference.

In the mechanism shown in FIG. 5, a temperature-sensitive constant force spring 3 and a temperature-responsive constant force spring 4 are wound around a large diameter drum 10 or a small diameter drum 9, attached to a support plate 12, and then Assume that the weight 6 and the communication shaft 13 are connected by a connecting shaft 13, and a temperature-sensitive constant force spring 3 is provided at the upper part, and a temperature-responsive constant force spring 4 is provided at the lower part.

Then, at a certain temperature T"C, the temperature-sensitive constant-load spring 3 tries to lift the weight 6, and the force A and the temperature-sensitive constant-load spring 4
It is assumed that the spring output, which is the resultant force of the force B which pulls down the weight 6, and the weight of the weight 6 are the same, and the weight 6 is stationary at a fixed place.

If the temperature rises by ΔT'C at this time, the radius of curvature Rn of the temperature-sensitive constant force spring 3 becomes smaller and its force A becomes larger. Since the radius of curvature Rn of the temperature-sensitive constant force spring 4 becomes larger, the output becomes smaller, and the weight 6 rises because rA>B+weight of the weight 6.

Also, when the temperature ΔT”C decreases, the temperature-sensitive constant force spring 3
The radius of curvature Rn becomes larger and the force A becomes smaller. Since the radius of curvature Rn of the temperature-sensitive constant force spring 4 becomes smaller, the force B
becomes larger, and rA < B + weight of weight 6, so weight 6
goes down.

Conversely, if the temperature sensitive constant force spring 4 is provided in the upper part and the temperature sensitive constant force spring 3 is provided in the lower part, the weight 6 lowers when the temperature rises and rises when the temperature falls.

Such a mechanism becomes a linear motion mechanism.

As an application example of these two types of mechanisms, Figures 10 to 14 show
Shown in the figure.

FIG. 1O shows a feeder rotating device for an air outlet of an air conditioner. When hot air hits the rotating device in winter, the temperature-sensitive constant force spring '4, which is made of a metal with a low coefficient of thermal expansion and is plastically worked so that it is on the outside of the curvature, increases the radius of curvature Rn, so its output A is equal to the coefficient of thermal expansion. Since the radius of curvature Rn of the temperature-sensitive constant force spring 3, which is made of a metal with a low curvature and is plastically processed so that it is on the inside of the curvature, is small, its relationship with the output B is BA
A, the feeder 14 rotates clockwise and hits the stopper and becomes vertical as shown in FIG.

When cold air hits the unit 1 in the summer, A>B' and the feeder 14 rotates counterclockwise and tilts diagonally.By these actions, the hot air in the winter can be converted diagonally to the cool air 1 in the summer. .

Furthermore, even if a known constant force spring 15 is used instead of the temperature sensitive constant force spring 3, the feeder 14 will be vertical in the winter and oblique in the summer.

Further, a known spiral spring 17 may be used instead of the temperature-sensitive constant force spring 3.

In this case, as shown in FIG. 14, at the time of assembly, the operating temperature of this feeder rotating device, in other words, the feeder 14 will be vertical when the temperature is higher than 20°C, and the feeder 14 will be vertical when the temperature is lower than that. In order to make the feeder 14 in an oblique direction, a known spiral is used in which the output of the temperature-sensitive constant force spring 3 is made equal to the output of the temperature-sensitive constant force spring 3 by adjusting the tightening rotation with the knob 16 in an atmosphere of 20°C. When a spring 17 is provided in this device, it operates in the same manner as described above.

FIG. 11 shows a water flow switching device installed between the boiler and the bath, and the operating method of the eight rotations and the combination of each spring are the same as described above.

When the temperature of the water flowing from the boiler becomes higher than the appropriate temperature for bathing, the valve 18 rotates clockwise from the position shown in Fig. 11, directly connecting the pipe from the bath to the pipe going to the boiler, and the water flow to the bath (to the boiler). Switching device) becomes a boiler in the bath. When the bathing temperature becomes lower than the appropriate temperature, the valve 18 rotates counterclockwise and returns to the position shown in FIG. 11, changing the water flow to the water flow switching device) to the boiler) to the water flow switching device φ boiler circulation.

Therefore, the temperature of the bathtub can be lowered automatically in winter without human intervention.

Figure 12 shows a toy boat for the bathroom. When the boat is placed in a bathtub, the screw rotates clockwise and the boat moves forward. Conversely, when placed in water, the screw rotates counterclockwise and the ship moves backwards. It is a toy that can be played with by manipulating it.

Figure 13 shows the same feeder rotation device for the air outlet of the air conditioning equipment as in Figure 1O, but in this case, the direct-acting I! 6. When hot air hits the feeder rotating device in winter, the radius of curvature Rn increases. Force A and radius of curvature Rn of the temperature-sensitive constant force spring 4 to form a coil shape.
The relationship between the force B that causes the temperature-sensitive constant force spring 3 to become coiled is A<B, and the feeder 14 is vertical, and when cold air hits in the summer, A>B, and the feeder 14 is tilted diagonally. Lean.

Therefore, cold air in the summer flows diagonally, and hot air in the winter flows straight down.

``Effects of the invention j The present invention uses a simple fi side rotating mechanism and linear motion mechanism that utilizes temperature changes, reducing time and costs in terms of maintenance and manufacturing.In addition, it is explosion-proof when exposed to high temperatures. This is particularly advantageous for rotary and linear motion devices that require

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of the temperature-sensitive constant force spring 3. FIG. 2 is a cross-sectional view of the temperature-sensitive constant force spring 4. Figure 3 shows equilibrium I! 4 is a side view of the rotating mechanism, and FIG. 5 is a perspective view of the linear motion mechanism. FIGS. 6 and 7 are front views showing the principle of the temperature-sensitive constant force spring 3. FIG. 8 is a front view of a non-contact temperature-sensitive spring using bimetal or the like. FIG. 9 is a sectional view of a constant force spring. 10, 11, 12, 13, and 14 are perspective views of application examples. 1 is a metal with spring properties, 2 is a metal with a low coefficient of thermal expansion, 3 is a metal with a low coefficient of thermal expansion.
・4 is a temperature-sensitive constant force spring, 5 is a winding drum, 6
1 is a weight, 7 is a string, 8 is a rotating shaft, 9 is a fixed shaft, 10 is a drum with a large diameter, 11 is a drum with a small diameter, 12 is a support plate, 1
3 is the spring communication axis. 14 is a feeder, 15 is a constant force spring, 16 is a knob,
17 is a spiral spring, and 18 is a valve. Patent applicant: Osaka Heat Treatment Co., Ltd. r1 color (A) (Order Δorder 12)

Claims (1)

[Claims] (a) A metal band 1 having spring properties and a metal band 2 having a low coefficient of thermal expansion are combined into one composite band. (b) This composite band is subjected to plastic working so that it has a constant or stepwise radius of curvature Rn. The spring processed as described above.