MX2014002239A - Pressure-activated switch and joint unit. - Google Patents
Pressure-activated switch and joint unit.Info
- Publication number
- MX2014002239A MX2014002239A MX2014002239A MX2014002239A MX2014002239A MX 2014002239 A MX2014002239 A MX 2014002239A MX 2014002239 A MX2014002239 A MX 2014002239A MX 2014002239 A MX2014002239 A MX 2014002239A MX 2014002239 A MX2014002239 A MX 2014002239A
- Authority
- MX
- Mexico
- Prior art keywords
- bellows
- joint
- support case
- joint unit
- pressure
- Prior art date
Links
- 238000003780 insertion Methods 0.000 claims abstract description 41
- 230000037431 insertion Effects 0.000 claims abstract description 41
- 230000002787 reinforcement Effects 0.000 claims abstract description 35
- 230000003014 reinforcing effect Effects 0.000 claims description 25
- 210000000078 claw Anatomy 0.000 abstract 2
- 230000000694 effects Effects 0.000 description 13
- 239000000758 substrate Substances 0.000 description 8
- 238000003466 welding Methods 0.000 description 8
- 239000002184 metal Substances 0.000 description 6
- 239000012530 fluid Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 229910001369 Brass Inorganic materials 0.000 description 4
- 239000010951 brass Substances 0.000 description 4
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 239000003507 refrigerant Substances 0.000 description 3
- 238000005057 refrigeration Methods 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 230000007480 spreading Effects 0.000 description 3
- 238000003892 spreading Methods 0.000 description 3
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 238000005304 joining Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000005476 soldering Methods 0.000 description 2
- 229910000906 Bronze Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000004826 seaming Methods 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H35/00—Switches operated by change of a physical condition
- H01H35/24—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow
- H01H35/32—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow actuated by bellows
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Switches Operated By Changes In Physical Conditions (AREA)
- Details Of Connecting Devices For Male And Female Coupling (AREA)
Abstract
The present invention allows a joint, bellows, and an actuation section to be easily combined with the main body of a pressure-activated switch, and the pressure-activated switch to be made small by eliminating the use of a cap or the like at the part where the joint is attached. The bellows (12) is connected with the joint (11) in order to construct a joint unit (1). A slit section (112a) is formed on the base of a hexagonal section (112) of the joint (11), said base part being positioned on a junction section's (111) side. A hexagonal insertion hole (21a) is created on the bottom plate (21) of a reinforcement plate (2), and the hexagonal section (112) is fitted into the insertion hole (21a). An actuation section (4) is combined with the reinforcement plate (2) in order to construct an assembly (10). Fixation claws (22a, 23a) are formed on the reinforcement plate (2). An insertion hole (31a) and a notch section (31b) are formed on the bottom plate (31) of a support case (3). Fixation holes (32a) are created on the back plate (32). The joint (11) is inserted through the insertion hole (31a), and a slit press-fitting section (31c) is press-fitted to the slit section (112a). The fixation claws (22a, 23a) are inserted through the fixation holes (32a) and bent. The corners of the hexagonal section (112) of the joint (11) are swaged toward the support case (3).
Description
SWITCH ACTIVATED BY PRESSURE AND JOINT UNIT
FIELD OF THE INVENTION
The present invention relates to a pressure activated switch and a joint unit for starting or stopping a refrigerant compressor or the like used in a refrigeration machine, an air conditioner, or the like, and in particular, refers to to the pressure activated switch having a deformed bellows body corresponding to a pressure of a refrigerant flowing in a refrigeration cycle or in a temperature sensitive cylinder and turning a switch on / off by a linking mechanism cooperated with the body of bellows, ~ and the seal unit used in the pressure activated switch.
BACKGROUND OF THE INVENTION
Conventionally, such a pressure activated switch is described in, for example, PTL 1 (JP, A, H10-334780). This pressure activated switch has a portion of low pressure side bellows and a portion of high pressure side bellows. Each bellows portion includes a cap (bellows cylinder 24a, 25a). A gasket (fluid connection portion 24d, 25d) is fixed to one end of the bellows cylinder, and a square flange 24e,
25e is integrally molded at the other end of the bellows cylinder. A bellows (bellows body 24f) is received in the cap, and a coolant is introduced into this bellows by means of a hole through the seal. Then, the bellows deforms corresponding to the pressure of the coolant inside it, and a mechanical switch is operated by a link mechanism that cooperates with this bellows.
In addition, the cap (bellows cylinder 24a, 25a) of each bellows portion is coupled to a main body unit by threading with a set screw (fastening screw 24h, 25h).
Figures 16A and 16B show a seal and a bellows structure of a conventional pressure activated switch, similar to that of PTL 1. A bellows b is fixed to the interior of a cover having a square flange by some method of union, such as soldering with solder, welding with brass, or simple soldering. In addition, a gasket c is fixed to one end of the lid by welding, and a through hole of the gasket c communicates with the interior of the bellows b. Then, a joint unit composed of the cover a, the bellows b, and the seal c is attached to a main body unit by screwing four corners of the flange to the top of the cover with fixing screws d. Incidentally, the unit of body
main is provided with a drive portion having a link mechanism cooperating with the bellows b.
List of Appointments
Patent Literature
PTL 1 JP, A, H10-334780
BRIEF DESCRIPTION OF THE INVENTION
Technical problem
In the conventional pressure activated switch described in the patent PTL 1, or shown in Figures 16A and 16B, the lid (bellows cylinder in PTL 1) and four screws are used as a structure for fixing the gasket and the bellows. Therefore, there is a problem because the cost increases.
An object of the present invention is to improve the fixing structure of the gasket and the bellows in the pressure activated switch in order to reduce the cost.
Solution to the problem
To achieve the above objective, according to a first aspect of the present invention, a pressure activated switch is provided which includes:
a joint unit made by connecting one
together with a bellows;
a reinforcing plate to which the joint unit is attached; Y
a support case with which the reinforcement plate is combined and a mechanical switch that cooperates with the bellows,
wherein the reinforcing plate is provided with an insertion hole into which the joint of the joint unit is inserted, and
wherein the joint unit is coupled to the support case by inserting the joint of the joint unit into the insertion hole from a back side of the reinforcement plate, and by press fitting and attaching the joint to the case of support so that the reinforcement plate is sandwiched between the joint unit and the support case.
According to a second aspect of the present invention, the pressure activated switch is provided as described in the first aspect,
wherein the support case is provided with an insertion hole into which the joint of the joint unit is inserted, and a rectangular notch extending from the insertion hole,
wherein the joint of the joint unit is provided with a slot to allow a portion of
Press fit of the groove formed around the outer periphery of the notch is snapped, and
wherein the gasket is press fit and fixed to the support case by press fit of the press fit portion of the groove in the groove of the gasket by means of the insertion hole of the support case.
According to a third aspect of the present invention, the pressure activated switch is provided as described in the first aspect,
wherein the support case is provided with a snap-fit hole in which the joint of the joint unit is inserted, and
wherein the gasket is press fit and fixed to the support case by press fitting the gasket into the pressure adjusting hole in a shaft direction.
According to a fourth aspect of the present invention, the pressure activated switch is provided as described in any of the first to third aspects,
wherein a driving portion configured to operate the mechanical switch cooperating with the bellows is combined with the reinforcing plate together with the joint unit.
According to a fifth aspect of the present invention, the pressure activated switch is provided as described in any of the first to fourth aspects,
where a base of the gasket on the bellows side is a polygonal column, and
wherein the insertion hole of the reinforcement plate is a polygonal hole that coincides with the polygonal column.
According to a sixth aspect of the present invention, the pressure activated switch is provided as described in the fifth aspect,
wherein, while the joint unit is coupled to the support case, a corner of the polygonal column of the joint of the joint unit is stamped towards the support case.
According to a seventh aspect of the present invention, the pressure activated switch is provided as described in any of the first to sixth aspects, which further includes:
a cylinder sensitive to temperature,
wherein, while the joint unit is coupled to the support case, a capillary communicated with the temperature sensitive cylinder is connected to the joint of the joint unit.
According to an eighth aspect of the present invention, the pressure activated switch is provided as described in any of the first to seventh aspects, which further includes:
a bellows guide, arranged on the inside and / or outside of the bellows of the joint unit to prevent the bellows from deforming in a radial direction with respect to a line of the bellows shaft.
According to a ninth aspect of the present invention, there is provided a seal unit used in the pressure activated switch as described in the fifth aspect or the sixth aspect,
wherein the joint is formed integrally with a connecting portion to be connected to the bellows having a larger diameter than the insertion hole of the reinforcing plate, and with a column portion defining the base of the polygonal column, and
wherein the groove is formed in a position separated from the connecting portion of the column portion by a thickness of the reinforcing plate.
According to a tenth aspect of the present invention, the joint unit is provided as described in the ninth aspect, which further includes:
a bellows guide, arranged on the inside and / or outside of the bellows to prevent the bellows from
deformed in a radial direction with respect to a line of the bellows shaft.
ADVANTAGEAL EFFECTS OF THE INVENTION
According to the pressure activated switch as described in the first aspect, the bellows is connected directly to the gasket, the gasket unit is combined with the reinforcement plate, and the gasket is press fit into the gasket support case. interposed the reinforcement plate between the joint unit and the support case. Therefore, a lid and a screw are not necessary in contrast to the usual way, and the pressure activated switch can be small in size.
According to the pressure activated switch as described in the second aspect, in addition to the effect of the first aspect, because the seal is inserted in the insertion hole of the support case, and, for example, a lower plate of the support case it rests on the entire circumference of the joint, the support case does not open and the strength of the support case is maintained. In addition, because the press fit portion of the groove is press fit into the groove of the joint horizontally, even if vertical force (the shaft direction) is applied to the joint unit, the joint unit is firmly fixed.
According to the pressure activated switch as described in the third aspect, in addition to the effect of the first aspect, because the seal is inserted into the press fit hole in the support case, and, for example, a bottom plate of the The support case is supported on the entire circumference of the joint, the support case does not open and the resistance of the support case is maintained. In addition, because the seal is press fit into the press fit hole in the shaft direction, the joint unit is easily combined.
According to the pressure activated switch as described in the fourth aspect, in addition to the effect of any of the first to third aspects, because the drive portion is combined with the reinforcing plate together with the joint unit, these They are treated as a combined set, and the assembly work becomes easy.
According to the pressure activated switch as described in the fifth aspect, in addition to the effect of any of the first to fourth aspects, because the polygonal column portion of the joint is mounted to the polygonal insertion hole of the plate. reinforcement, rotation of the joint unit with respect to the reinforcement plate is avoided, and the joint unit is securely fixed.
According to the pressure activated switch as described in the sixth aspect, in addition to the effect of the fifth aspect, because the corner of the polygonal column of the joint is stamped towards the support case, while the joint unit is Coupled to the support case, the joint unit is secured more securely to the support case.
According to the pressure activated switch as described in the seventh aspect, a temperature switch having the effect of any of the first to sixth aspects can be constructed.
According to the pressure activated switch as described in the eighth aspect, in addition to the effect of any of the first to seventh aspects, because the deformation of the bellows in the radial direction is avoided, the load applied to the bellows is relatively even, and the pressure resistance of the bellows is increased.
According to the joint unit as described in the ninth aspect, the same effect as the fifth aspect or the sixth aspect is achieved.
According to the joint unit as described in the tenth aspect, in addition to the effect of the ninth aspect, because deformation of the bellows in the radial direction is avoided, the load applied to the bellows is equalized.
relatively, and the pressure resistance of the bellows is increased.
BRIEF DESCRIPTION OF THE FIGURES
Figure 1 is an external perspective view showing a combined assembly consisting of a bellows and a seal before being coupled to a support case according to a pressure activated switch of a first embodiment of the present invention.
Figure 2 is an external perspective view showing the combined assembly inserted in an insertion hole of the support case that is coupled to the support case according to the pressure activated switch of the first embodiment of the present invention.
Figure 3 is an external perspective view showing a condition in which a press fit portion of the support case is snapped into a groove of the combined assembly according to the pressure activated switch of the first embodiment of the present invention.
Figure 4 is an external perspective view showing a coupling condition in which the combined assembly according to the pressure activated switch of the first embodiment of the present invention is fixed to the support case.
Figure 5 is a schematic front perspective view showing a joint unit according to the first embodiment of the present invention.
Figure 6 is a perspective view showing the joint unit and a reinforcing plate according to the first embodiment of the present invention.
Figure 7 is a perspective view showing the combined assembly wherein the joint unit and the actuating portion are combined with the reinforcing plate according to the first embodiment of the present invention.
Figure 8 is a side view showing the combined assembly wherein the joint unit and the driving portion are combined with the reinforcing plate according to the first embodiment of the present invention.
Figure 9A is a top view showing the pressure activated switch according to the first embodiment of the present invention.
Figure 9B is a front view showing the pressure activated switch according to the first embodiment of the present invention.
Figure 9C is a bottom view showing the pressure activated switch according to the first embodiment of the present invention.
Figure 9D is a front view showing the
pressure activated switch from which an outer cover is removed according to the first embodiment of the present invention.
Figure 10A is a top view showing the pressure activated switch defining a temperature sensor according to the first embodiment of the present invention.
Figure 10B is a front view showing the pressure activated switch defining the temperature sensor according to the first embodiment of the present invention.
Figure 10C is a bottom view showing the pressure activated switch defining a temperature sensor according to the first embodiment of the present invention.
Figure 10D is a front view showing the pressure activated switch defining a temperature sensor, from which an outer cover is removed according to the first embodiment of the present invention.
Figure 11 is a vertical sectional view showing the joint unit in which an inner guide of the bellows is provided inside the bellows according to the other embodiment of the present invention.
Figure 12 is a vertical sectional view showing the joint unit in which a
outer bellows guide on the outside of the bellows according to the other embodiment of the present invention.
Figure 13 is a vertical sectional view showing the joint unit in which the inner guide of the bellows is provided inside the bellows and the outer bellows guide is provided on the outside of the bellows according to the other embodiment of the bellows. the present invention.
Figure 14 is an external perspective view showing a combined assembly consisting of a bellows and a gasket before being coupled to a support case according to a pressure activated switch of a second embodiment of the present invention.
Figure 15 is an external perspective view showing a coupling condition in which the combined assembly according to the pressure activated switch of the second embodiment of the present invention is fixed to the support case.
Figure 16A is a side view showing a seaming structure of a gasket and a bellows of a conventional pressure activated switch.
Figure 16B is a bottom view showing the joint fixing structure and the bellows of the conventional pressure activated switch.
DETAILED DESCRIPTION OF THE INVENTION
Next, one embodiment of a pressure activated switch and a joint unit according to the present invention will be explained with reference to the figures. Figures 1 to 4 show a process of a combined assembly coupled to a support case according to a first embodiment of the present invention. Figure 1 is an external perspective view showing a condition before the combined assembly is attached to the support case. Figure 2 is an external perspective view showing the combined assembly inserted in an insertion hole of the support case coupled to the support case. Figure 3 is an external perspective view showing a condition in which a press fit portion of the support case is snapped into a slot in the combined assembly. Figure 4 is an external perspective view showing a coupling condition in which the combined assembly is fixed to the support case. Figure 5 is a perspective view showing a joint unit. Figure 6 is a perspective view showing the joint unit and a reinforcing plate. Figure 7 is a perspective view showing the combined assembly wherein the joint unit and the drive portion are combined with the backing plate. Figure 8 is a side view showing the combined assembly where the
Joint unit and drive portion are combined with the reinforcement plate. Figure 9A is a top view showing the pressure activated switch according to the first embodiment of the present invention. Figure 9B is a front view showing the pressure activated switch according to the first embodiment of the present invention. Figure 9C is a bottom view showing the pressure activated switch according to the first embodiment of the present invention. Figure 9D is a front view showing the pressure activated switch from which an outer cover is removed according to the first embodiment of the present invention.
In the figures, the reference sign 1 denotes the joint unit, 2 denotes the reinforcing plate, 3 denotes the support case, 4 denotes the operating portion, 5 denotes a microswitch as a mechanical switch, and 6 denotes the cover Exterior. In addition, the reference sign 10 denotes the combined assembly in which the joint unit 1 and the operating portion 4 are combined with the reinforcing plate 2.
As shown in Figure 5, the joint unit 1 is made by connecting the bellows 12 to the joint made of bronze 11 by some joining method such as tin welding, brass welding, or simple welding. The
joint 11 is produced by the cutting work, and is defined by a connecting portion in the form of a circular column 111 connected to the bellows 12, a hexagonal portion 112 formed in a hexagonal column shape as a "polygonal column", and a portion of flare joint 113 having a male screw 113a at the outer periphery thereof. In addition, two slot portions 112a are formed on both sides of the hexagonal portion 112 near the connecting portion 111. Incidentally, a spreading nut engages the spreader joint portion 113 to connect tubing that is not sample (fluid introduction tube).
As shown in Figure 6, the reinforcement plate 2 is made by perforating and folding a metal plate, and includes: a bottom plate 21; two side plates 22; an upper plate 23 and a front plate 24. An insertion hole 21a is provided in the lower plate 21 for inserting the gasket 11 (hexagonal portion 112) of the gasket unit 1. This insertion hole 21a is a hexagonal hole to be adjusted with the hexagonal column of the hexagonal portion 112. Two clamping jaws 22a, 23a are formed in each of the side plates 22 and the upper plate 23 at the ends opposite the front plate 24. In addition, a screw orifice of interval setting 23b and a
differential pressure adjustment screw hole on / off 23c are provided in the top plate 23. An operation range adjusting orifice 24a, a range display window 24b, and a differential pressure display window 24c are provided on the front plate 24.
As shown in Figure 7, the joint unit 1 is combined with the reinforcing plate 2 by adjusting the hexagonal portion 112 in the insertion hole 21a of the lower plate 21. Furthermore, as shown in Figures 7 and 8, the driving portion 4 is combined with the reinforcing plate 2 on the side of the bellows 12 of the joint unit 1. In this way, the combined assembly 10 is defined. The operating portion 4 includes: an accessory of drive 41; a micro-drive position adjusting screw 42; a spring for adjusting the operating pressure 43; a patch metal 44; and an interval adjusting screw 45. The actuating pressure adjusting spring 43 is interposed between the actuator attachment 41 and the patch metal 44. A spring force applied to the bellows 12 of the pressure adjusting spring drive 43 is adjusted by adjusting the thread length of the adjusting screw of interval 45. By the way, although a figure is omitted,
sets an on / off differential pressure by means of a differential pressure adjustment screw on / off.
The drive attachment 41 is made by perforating and folding a metal plate, and includes: a substrate 41a abutting an upper portion of the bellows 12; an actuating lever 41b extending substantially perpendicular to the substrate 41a from one end of the substrate 41a; and a female thread portion 41c extending vertically from the other end of the substrate 41a. In addition, the drive attachment 41 is rotatably supported by a shaft 41d between the side plates 22, 22 of the reinforcement plate 2, and the drive attachment 41 can rotate relative to the reinforcement plate 2. It is said to be step, a regulating plate 4 (see Figure 8) provided at one end of the substrate 41a is inserted into the regulating orifice of the operating range 24a of the reinforcing plate 2, and therefore a rotation interval is regulated of the drive accessory 41.
In addition, the adjustment screw of the micro-actuation position 42 penetrates the actuating lever 41b, and is screwed with the female thread that is not shown from the female thread portion 41c against the spring force of the actuating lever 41b in FIG.
relationship with the substrate 41a. Therefore, an angle of the actuating lever 41b in relation to the substrate 41a is finely adjusted by the degree of screwing of the adjustment screw of the micro-actuation position 42. In this way, the angle of the actuating lever 41b is finely adjusts to drive the drive portion 4 securely against the adjustment pressure, and the drive variation due to a mounting error or the like is eliminated.
According to the above configuration, the drive portion operates in the following manner. Due to an action of the bellows 12, the drive attachment 41 is rotated against the spring force of the actuating pressure adjusting spring 43, and the microswitch 5 is turned on / off together with the actuation lever 41b of the actuator. drive accessory 41. By the way, the microswitch 5 is provided with a terminal 51 (see Figures 9D and 10D) connected to a control line (not shown).
As shown in Figure 1, the support case 3 is made by perforating and folding a metal plate, and includes: a bottom plate 31; a back plate 32; and an upper plate 33. The lower plate 31 is provided with a circular insertion hole 31a for inserting the gasket 11 (hexagonal portion 112) of the unit
of seal 1, and a rectangular notch portion 31b extending from insertion hole 31a. The slot pressure fitting portions 31c, 31c are disposed on both sides of the notch portion 31b. A front gap between the slot pressure fitting portions 31c, 31c corresponds to a gap between two slot portions 112a, 112a of the seal 11 so as to allow the slot pressure fitting portions 31a, 31a to conform to pressure in the groove portions 112a, 112a of the joint 11. Incidentally, the lower plate 31 is provided with a wire extraction hole 31 for extracting a conductive wire connected to the microswitch 5.
The back plate 32 of the support case 3 is provided with six fixing holes 32a for inserting the six fixing jaws 22a, 23a of the reinforcement plate 2. Furthermore, the back plate 32 is provided with a fixing protrusion 32b for fixing the switch activated by pressure to the refrigerator or similar. In addition, the back plate 32 is provided with an adjustment screw hole 32c, from which the adjustment screw of the micro-actuation position 42, located further inside this fixing protrusion 32b, is exposed.
As shown in Figure 5, in the hexagonal portion 112 of the joint 11, a height of the base in the
side of the connecting portion 111 (a length in the direction of the line of the axis L) DI is equal to a thickness of the lower plate 21 of the reinforcement plate 2. In addition, a width of the slot portion 112a (a length in the direction of the line of the axis L) D2 is equal to a thickness of the bottom plate 31 of the support case 3. Thus, as shown in Figures 7 and 8, when the combined assembly 10 is assembled, the connecting portion 111 of the seal 11 abuts the lower plate 21, and as shown in Figure 8, an upper inner surface of the slot portion 112a is in the same plane as a surface of the lower plate 21.
A method for combining the combined set 10 with the support case 3 is explained as follows. First, as shown in Figure 1, the clamping jaws 22a, 23a of the reinforcing plate 2 are directed towards the back plate 32 of the support case 3, and as shown in Figure 2, the hexagonal portion. 112 of the seal 11 is inserted into the insertion hole 31a in the lower plate 31 of the support case 3. In this condition, because the slot portion 112a is parallel to the press fit portion 31c, as shown in Figure 3, the combined assembly 10 is moved towards the back plate 32 to press fit the pressure fit portion of slot 31c in the portion
of slot 112a. At this time, the clamping jaws 22a, 23a are inserted into the fixing holes 32a in the back plate 32. Then, as shown in Figure 4, the clamping jaws 22a, 23a are bent to fix the reinforcement plate 2 to the support case 3. In addition, the corners A of the hexagonal column of the hexagonal portion 112 are stamped towards the support case 3. Due to this stamping, a side interspersed between the corners A of the hexagonal column expands slightly towards the outside, and the gasket 11 and the support case 3 are more firmly fixed to each other.
After mounting as indicated above, the lower plate 21 of the reinforcing plate 2 is interspersed by the lower plate 31 of the support case 3 snapped and fixed to the slot portion 112a, and by a lower end surface the connecting portion 111 of the gasket 11. Further, because the hexagonal portion 112 of the gasket 11 is placed in the hexagonal insertion hole 21a in the reinforcement plate 2, the gasket unit 1 is prevented from rotating around of the line of the axis L with respect to the reinforcement plate 2. In this way, the combined assembly 10 is securely fixed to the support case 3.
Incidentally, the adjusting screw of the micro-drive position 42 is placed in the hole of the
adjustment screw 32c of the back plate 32. Specifically, the adjustment screw of the micro-operation position 42 is not placed on a front side of the pressure-activated switch. Therefore, a user or the like is prevented from operating the adjusting screw of the micro-drive position 42 without care.
The above pressure activated switch senses the pressure of various fluids such as the refrigerant of a compressor of a refrigeration cycle. In addition, a temperature switch shown in Figures 10A to 10D can be defined using this pressure activated switch. In the temperature switch of Figures 10A to 10D, a capillary 30 communicated with a temperature sensitive cylinder 20 by means of a support 14 is connected to the flare joint portion 113 of the seal 11. Incidentally, with respect to to the displays in Figures 9B and 9D and Figures 10B and 10D, in Figures 9B and 9D, a pressure scale is shown, and a temperature scale is shown in Figures 10B and 10D.
According to the first embodiment above, only one joint unit 1 is provided. However, as PTL 1, the joint units can be provided, respectively for the high pressure side pressure and for the low pressure side pressure , and you can
apply similar configurations to the joint unit 1, the reinforcement plate 2, and the support case 3.
Figures 11 to 13 are vertical sectional views showing the other embodiment of the joint unit. In Figures 12 and 13, the same components as Figure 11 are denoted with the same reference numerals, and detailed explanations thereof are omitted.
A joint unit 7A shown in Figure 11 is made by connecting the bellows 72 to the joint made of brass 71 by some joining method such as tin welding, brass welding, or simple welding. The seal 71 is made by cutting work, and is defined by a connecting portion in the form of a circular column 711 connected to the bellows 72, a hexagonal portion 712 formed in a hexagonal column shape as a "polygonal column", a joint portion of flare 713 having a male screw 713a at an outer periphery thereof, and an inner guide of the bellows 714 as a "bellows guide" provided on the inside of the bellows 72 from the connecting portion 711. In addition, two portions of slot 712a are formed on both sides of the hexagonal portion 712 near the connecting portion 711. Incidentally, an insertion hole 71a is provided for introducing pipe fluid not shown (tube insertion
fluid) to the bellows 72 in the center of the seal 71.
In this joint unit 7A also, a height of the base on the side of the connecting portion 711 (a length in the direction of the line of the axis L) DI is equal to a thickness of the lower plate 21 of the plate reinforcement 2. Further, a width of the slot portion 712a (a length in the direction of the line of the axis L) D2 is equal to a thickness of the bottom plate 31 of the support case 3. Furthermore, in this joint unit 7A also, similar to the first embodiment, after the bottom plate 31 of the support case 3 is press fit and fixed to the slot portion 712a, the bottom plate 21 of the reinforcement plate 2 is sandwiched between the bottom plate 31 of the support case 3 and a lower end surface of the connecting portion 711 of the seal 71. Further, because the hexagonal portion 712 of the seal 71 is fitted in the hexagonal insertion hole 21a in the reinforcement plate 2, the joint unit 7A is prevented from rotating r around the line of the axis L with respect to the reinforcement plate 2. In this way, the combined assembly combining the joint unit 7A and the actuating portion with the reinforcing plate 2 is securely fixed to the carrying case. support 3.
The inner guide of the bellows 714 is formed in a circular column shape around the line of the L-axis,
and an outer diameter of the inner guide of the bellows 714 is slightly smaller than an inner diameter of the bellows 72 (inner diameter of a valley portion). Thus, a side surface of the inner guide of the bellows 714 is adjacent to the interior of the bellows 72. The drive attachment 41 abuts on an upper portion 72a of the bellows 72. For example, when excessive high pressure is applied, both ends of bellows 72 in the direction of the line of the axis L are fixed by the drive attachment 41 and the seal 71. Therefore, when the bellows 72 is to be deformed, a portion of the bellows portion of the bellows 72 may be deformed in the direction of the line of the axis L, but a deformation in a radial direction of the bellows 72 with respect to the line of the axis L is prevented. Therefore, the load applied to the bellows 72 is relatively even, and the resistance to the pressure of the bellows 72.
A joint unit 7B shown in Figure 12 is defined by the seal 71, the connection portion 711, the hexagonal portion 712, the flare joint portion 713, and an outer guide of the bellows 715 as a "bellows guide" provided on the outside of the bellows 72 from an outer peripheral end of the connecting portion 711. A configuration and an attachment effect of the combined assembly combining the
seal 7B to support case 3 are the same as joint assembly 7A of Figure 11.
The outer guide of the bellows 715 is formed in a circular cylinder shape around the line of the axis L, and an inner diameter of the outer guide of the bellows 715 is slightly larger than an outer diameter of the bellows 72 (outer diameter of a portion of the bellows 715). hill). In this way, an inner surface of the outer guide of the bellows 715 is adjacent to an outer surface of the bellows 72. Therefore, similar to the foregoing, when excessive high pressure is applied, and the bellows 72 is to be deformed, a part of the bellows portion of the bellows 72 can be deformed in the direction of the line of the axis L, but a deformation in a radial direction of the bellows 72 with respect to the line of the axis L is prevented. Therefore, the load applied to the bellows 72 is relatively even, and the pressure resistance of bellows 72 is increased.
A joint unit 7C shown in Figure 13 is defined by the seal 71, the connecting portion 711, the hexagonal portion 712, the flare joint portion 713, the inner guide of the bellows 714 provided inside the bellows 72 a starting from the connecting portion 711 and the outer guide of the bellows 715 provided on the outside of the bellows 72 from an outer peripheral end of the connection portion 711.
A configuration and an attachment effect of the combined assembly combining the joint unit 7C to the support case 3 are the same as the joint unit 7? of Figure 11.
One operation and an effect of the inner guide of the bellows 714 and the outer guide of the bellows 715 are the same as the attachment unit 7A of Figure 11 and the attachment unit 7B of Figure 12. In the joint unit 7C, due to the operations of the inner guide of the bellows 714 and the outer guide of the bellows 715, when excessive high pressure is applied and the bellows 72 is to be deformed, a deformation in a radial direction of the bellows 72 with respect to the line of the axis L. Therefore, the load applied to the bellows 72 is relatively even, and the resistance to pressure of the bellows 72 is increased.
According to the above embodiments, the inner guide of the bellows 714 and the outer guide of the bellows 715 are formed integrally with the connection portion 711 (seal 11) by cutting work. However, either or both of the inner guide of the bellows 714 and the outer guide of the bellows 715 can be integrally formed by press fit to the connecting portion 711 due to the engagement of a concave portion and a convex portion.
Figure 14 is an external perspective view
showing a combined assembly consisting of a bellows and a gasket before being coupled to a carrying case according to a pressure activated switch of a second embodiment of the present invention. Figure 15 is an external perspective view showing a coupling condition in which the combined assembly according to the pressure-activated switch of the second embodiment of the present invention is fixed to the support frame. Incidentally, in the second embodiment, the same components as the first embodiment are denoted by the same reference number as in Figures 1 to 8, and detailed explanations thereof are omitted.
A difference between the joint unit 1 'of the second embodiment and the joint unit 1 of the first embodiment is that while the slot portion 112a is formed in the hexagonal portion 112 as a "polygonal column" of the joint unit 1 of the first embodiment, the slot portion is not formed in the hexagonal portion 112 'as a "polygonal column" of the joint unit 1' of the second embodiment. In addition, a difference between the support case 3 'of the second embodiment and the support case 3 of the first embodiment is that while the insertion hole 31a and the notch portion 31b are provided in the lower plate 31 of the carrying case. support 3, a hexagonal snap-fit hole 31e to insert the
hexagonal portion 112 'of the gasket 11 is provided in the lower plate 31 of the support case 3' of the second embodiment.
The press fit hole 31e is provided in a position corresponding to the notch portion 31b of the first embodiment. In addition, an inside diameter of the press fit hole 31e is slightly smaller than an outside diameter of the hexagonal portion 112 '. In addition, the combined assembly 10 in combination with the seal unit 1 'is fixed to the support case 3' by snapping the hexagonal portion 112 'of the seal 11 into the press fit hole 31e in the direction of the line of the axis L. Then, the corners A of the hexagonal column of the hexagonal portion 112 'of the joint 11 are stamped towards the support case 3'. Due to this stamping, a side interspersed between the corners A of the hexagonal column expands slightly to the outside, and the gasket 11 and the support case 3 'are more firmly fixed to each other. That is, the lower plate 21 of the reinforcing plate 2 is sandwiched between the lower plate 31 of the support case 3 'and a lower end surface of the connection portion 111 of the joint 11. Furthermore, because the portion hexagonal 112 'of the gasket 11 is mounted in the hexagonal insertion hole 21a in the plate
reinforcement 2 and the pressure adjusting hole 31e of the support case 3 ', the joint unit 1' can not rotate on the line of the axis L. In this way, the combined assembly 10 is securely fixed to the support case 3' .
The joint unit 1 of the first embodiment and the joint unit 1 'of the second embodiment can be provided with the inner guide of the bellows 714 as shown in Figure 11, provided with the outer guide of the bellows 715 as shown in FIG. Figure 12, or provided with the inner guide of the bellows 714 and the outer guide of the bellows 715 as shown in Figure 13.
Furthermore, in the first and second embodiments, the polygonal column of the joint is a hexagonal column, and the insertion hole of the reinforcement plate is hexagonal. However, like the polygonal column and the insertion hole, any shape can be used, as long as they prevent the rotation of the joint. For example, the polygonal column may be a triangular column, a square column, a pentagonal column, or the other rectangular column, and the insertion hole of the reinforcement plate may be so polygonal as to be adjusted with the polygonal column. Also, the polygon can be a star shape. In addition, the shapes of the orifice
press fit 31e of the support case 3 'and the polygonal column (hexagonal portion 112') of the second embodiment can be similar to the previous ones.
LIST OF REFERENCE NUMBERS
1 joint unit
11 board
12 bellows
111 connection portion
112 hexagonal portion (hexagonal column) 113a male screw
113 spreading joint portion 112a slot portion (slot)
2 reinforcement plate
21 lower plate
21st introduction hole
22 side plate
22a fixing clamp
23 top plate
23a fixing clamp
3 support case
31 bottom plate
31st insertion hole
31b notch portion
31c slot pressure adjustment portion
32 back plate
32nd fixing hole
32b fixation boss
32c screw hole adjustment
4 drive portion
41 drive accessory
41st substrate
41b drive lever
41c female thread portion
42 micro-drive position adjustment screw
43 pressure adjustment spring drive
44 patch metal
45 interval adjustment screw
5 microswitch
6 outer cover
1 'joint unit
112 'hexagonal portion (polygonal column)
3 'support case
31e pressure adjustment hole
7A union unit
71 board
72 bellows
711 connection portion
12 hexagonal portion
12th slot portion
13 spreading joint portion 14 inner guide of the bellows
B joint unit
15 outside guide of the bellows
C joint unit
0 combined set
1e pressure adjustment hole
Claims (10)
1. Pressure activated switch characterized in that it comprises: a joint unit made by the connection of a gasket with a bellows; a reinforcing plate to which the joint unit is attached; and a support case with which the reinforcing plate is combined and a mechanical switch cooperating with the bellows, wherein the reinforcing plate is provided with an insertion hole into which the joint of the joint unit is inserted, and wherein the joint unit is coupled to the support case by inserting the joint of the joint unit into the insertion hole from a back side of the reinforcement plate, and by snapping and attaching the joint to the case of support so that the reinforcement plate is sandwiched between the joint unit and the support case.
2. Pressure-activated switch according to claim 1, characterized in that the support case is provided with an insertion hole in which the joint of the joint unit is inserted, and a rectangular notch extending from the insertion hole, in wherein the joint of the joint unit is provided with a slot to allow a slot pressure fitting portion formed around an outer periphery of the notch to snap, and wherein the gasket is press fit and fixed to the support case by press fit of the slot pressure fitting portion in the gasket groove by means of the insert hole of the support case.
3. Pressure activated switch according to claim 1, characterized in that the support case is provided with a press fit hole in which the joint of the joint unit is inserted, and where the joint is press fit and fixed to the support case by press fitting the gasket in the pressure adjusting hole in one direction of the shaft.
4. Pressure activated switch according to any of claims 1 to 3, characterized in that an actuating portion configured to operate the mechanical switch cooperating with the bellows is combined with the reinforcing plate together with the joint unit.
5. Pressure-activated switch according to any of claims 1 to 4, characterized in that a base of the gasket on the bellows side is a polygonal column, and wherein the insertion hole of the reinforcement plate is a polygonal orifice that coincides with the polygonal column.
6. Switch activated by pressure according to claim 5, characterized in that, while the joint unit is coupled to the support case, a corner of the polygonal column of the joint of the joint unit is stamped towards the support case.
7. Pressure activated switch according to any of claims 1 to 6, characterized in that it further comprises: a temperature-sensitive cylinder, wherein, while the joint unit is coupled to the support case, a capillary communicated with the cylinder sensitive to the temperature is connected to the joint of the joint unit.
8. Pressure activated switch according to any of claims 1 to 7, characterized in that it further comprises: a bellows guide, arranged inside and / or outside the bellows of the joint unit to prevent the bellows from deforming into a radial direction with respect to a line of the bellows shaft.
9. Seal unit used in the pressure activated switch according to claim 5 or 6, characterized in that the seal is formed integrally with a connecting portion to be connected to the bellows having a larger diameter than the insertion hole of the plate. reinforcement, and with a column portion that defines the base of the column polygonal, and wherein the groove is formed in a position separated from the connecting portion of the column portion by a thickness of the reinforcing plate.
10. Seal unit according to claim 9, characterized in that it further comprises: a bellows guide, arranged on the inside and / or outside of the bellows to prevent the bellows from deforming in a radial direction with respect to a line of the axis of the bellows. bellows. SUMMARY The present invention allows a gasket, a bellows, and a drive portion to be easily combined with a main body of a pressure activated switch, and the pressure activated switch is small in size by eliminating the use of a cap or the like in the part where the joint is attached. The bellows (12) is connected to the gasket (11) in order to build a gasket unit (1). A slot portion (112a) is formed at the base of a hexagonal portion (112) of the gasket (11), the base portion is placed on one side of the connection portion (111). A hexagonal insertion hole (21a) is created in the lower plate (21) of a reinforcing plate (2), and the hexagonal portion (112) is placed in the insertion hole (21a). A drive portion (4) is combined with the reinforcement plate (2) in order to build a set (10). The clamping jaws (22a, 23a) are formed in the reinforcement plate (2). An insertion hole (31a) and a notch portion (31b) are formed in the lower plate (31) of a support case (3). The fixing holes (32a) are created in the back plate (32). The gasket (11) is inserted through the insertion hole (31a), and a slot pressure adjusting portion (31c) is press fit to the slot portion (112a). The clamping jaws (22a, 23a) are insert through the fixing holes (32a) and bend. The corners of the hexagonal portion (112) of the gasket (11) are stamped towards the support case (3).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011195934 | 2011-09-08 | ||
| PCT/JP2012/057903 WO2013035365A1 (en) | 2011-09-08 | 2012-03-27 | Pressure-activated switch and joint unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| MX2014002239A true MX2014002239A (en) | 2014-08-27 |
Family
ID=47831832
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| MX2014002239A MX2014002239A (en) | 2011-09-08 | 2012-03-27 | Pressure-activated switch and joint unit. |
Country Status (6)
| Country | Link |
|---|---|
| JP (2) | JP5676768B2 (en) |
| KR (1) | KR101639924B1 (en) |
| CN (2) | CN106158506B (en) |
| MX (1) | MX2014002239A (en) |
| TW (1) | TWI467614B (en) |
| WO (1) | WO2013035365A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104990573B (en) * | 2015-06-30 | 2017-12-05 | 佛山市顺德区美的饮水机制造有限公司 | Water purifier and its pressure switch |
| TWI627651B (en) * | 2018-01-18 | 2018-06-21 | Nat Chung Shan Inst Science & Tech | Ripple type pressure switch |
| JP7105742B2 (en) | 2019-07-31 | 2022-07-25 | 株式会社鷺宮製作所 | pressure switch |
Family Cites Families (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2489419A (en) * | 1945-02-10 | 1949-11-29 | Gen Motors Corp | Pressure responsive switch |
| JPS504696Y1 (en) * | 1973-04-19 | 1975-02-07 | ||
| FR2523722A1 (en) * | 1982-03-17 | 1983-09-23 | Alsthom Atlantique | Differential manometer giving electrical output indication - includes sealed bellows arranged to operate three microswitches sequentially when ambient pressure falls |
| JPS599450U (en) * | 1982-07-10 | 1984-01-21 | 兵田計器工業株式会社 | temperature compensated pressure switch |
| JPS6489129A (en) * | 1987-09-30 | 1989-04-03 | Anritsu Corp | Electromagnetic relay |
| JPH0220247U (en) * | 1988-07-25 | 1990-02-09 | ||
| JPH0289734U (en) * | 1988-12-28 | 1990-07-17 | ||
| JPH0697584B2 (en) * | 1991-02-28 | 1994-11-30 | 株式会社ノーリツ | Operation switch for water |
| CN2138832Y (en) * | 1992-06-04 | 1993-07-21 | 于之文 | Air density controller |
| JPH0642659A (en) * | 1992-07-22 | 1994-02-18 | Nippondenso Co Ltd | Pressure regulating valve |
| JPH0617083U (en) * | 1992-07-31 | 1994-03-04 | 太平洋工業株式会社 | pressure switch |
| CN2195792Y (en) * | 1994-05-13 | 1995-04-26 | 施一宏 | Overvoltage protective device for liquid-filling electric heater |
| JPH10334780A (en) * | 1997-06-04 | 1998-12-18 | Fuji Koki Corp | Pressure responding switch |
| CN2807448Y (en) * | 2005-05-31 | 2006-08-16 | 王健能 | Minitype pressure controller |
| CN201397479Y (en) * | 2009-05-10 | 2010-02-03 | 方云 | Single pressure controller |
| CN201622093U (en) * | 2010-03-10 | 2010-11-03 | 光阳产业股份有限公司 | Gas meter connector |
| CN202018920U (en) * | 2010-12-29 | 2011-10-26 | 沈阳沈变所电气科技有限公司 | Quick-acting oil pressure relay |
-
2012
- 2012-03-27 KR KR1020147004169A patent/KR101639924B1/en active Active
- 2012-03-27 CN CN201610575640.4A patent/CN106158506B/en active Active
- 2012-03-27 WO PCT/JP2012/057903 patent/WO2013035365A1/en active Application Filing
- 2012-03-27 MX MX2014002239A patent/MX2014002239A/en active IP Right Grant
- 2012-03-27 CN CN201280038964.4A patent/CN103733292B/en active Active
- 2012-03-27 JP JP2013532468A patent/JP5676768B2/en active Active
- 2012-09-04 TW TW101132197A patent/TWI467614B/en active
-
2014
- 2014-12-24 JP JP2014260594A patent/JP5916165B2/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| KR101639924B1 (en) | 2016-07-14 |
| JP5676768B2 (en) | 2015-02-25 |
| CN106158506B (en) | 2018-11-06 |
| JP5916165B2 (en) | 2016-05-11 |
| CN106158506A (en) | 2016-11-23 |
| TW201322297A (en) | 2013-06-01 |
| TWI467614B (en) | 2015-01-01 |
| CN103733292B (en) | 2016-08-17 |
| JPWO2013035365A1 (en) | 2015-03-23 |
| JP2015099781A (en) | 2015-05-28 |
| CN103733292A (en) | 2014-04-16 |
| KR20140048992A (en) | 2014-04-24 |
| WO2013035365A1 (en) | 2013-03-14 |
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