WO2022163069A1 - サーモスタット装置 - Google Patents
サーモスタット装置 Download PDFInfo
- Publication number
- WO2022163069A1 WO2022163069A1 PCT/JP2021/041519 JP2021041519W WO2022163069A1 WO 2022163069 A1 WO2022163069 A1 WO 2022163069A1 JP 2021041519 W JP2021041519 W JP 2021041519W WO 2022163069 A1 WO2022163069 A1 WO 2022163069A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- leg
- thermostat device
- engaged portion
- housing
- frame
- Prior art date
Links
- 230000008602 contraction Effects 0.000 claims description 4
- 239000002826 coolant Substances 0.000 description 11
- 238000001816 cooling Methods 0.000 description 8
- 239000000110 cooling liquid Substances 0.000 description 7
- 230000013011 mating Effects 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 229920003002 synthetic resin Polymers 0.000 description 4
- 239000000057 synthetic resin Substances 0.000 description 4
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P7/00—Controlling of coolant flow
- F01P7/14—Controlling of coolant flow the coolant being liquid
- F01P7/16—Controlling of coolant flow the coolant being liquid by thermostatic control
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/002—Actuating devices; Operating means; Releasing devices actuated by temperature variation
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/01—Control of temperature without auxiliary power
- G05D23/02—Control of temperature without auxiliary power with sensing element expanding and contracting in response to changes of temperature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P7/00—Controlling of coolant flow
- F01P7/14—Controlling of coolant flow the coolant being liquid
- F01P2007/146—Controlling of coolant flow the coolant being liquid using valves
Definitions
- the present invention relates to a thermostat device.
- thermoelement 51 whose one end is inserted into the housing 60 and expands and contracts according to temperature
- a valve body 52 that opens and closes by expansion and contraction of a thermo-element 51
- a coil spring 53 that biases the valve body 52 in a closing direction
- a frame 65 that supports one end of the coil spring 53 .
- a leg 62 In a conventional thermostat device, as shown in FIG. 9, the entire tip of a leg 62 is protruded inward to form a hook portion 62a, and a frame 65 functioning as a spring bearing is hooked on this hook portion 62a. ing. Even in such a case, if the housing 60 is made of metal such as aluminum, even if the spring load of the coil spring 53 is applied to the hook portion 62a, the leg 62 will be deformed and the frame 65 will fall off. no.
- the housing 60 including the pair of legs 62, 62 is changed from metal to synthetic resin for the purpose of cost reduction, weight reduction, etc.
- the durability of the pair of legs 62 is reduced by the spring load.
- 62 are separated from each other and the pair of legs 62, 62 are deformed so that the frame 65 may fall off.
- the present invention has been made in view of the above points, and an object of the present invention is to provide a thermostat device capable of suppressing the opening of the legs of the housing and preventing the frame from falling off.
- a thermostat device comprises a housing having a valve seat formed therein; a thermo-element having one end inserted into the housing and expanding and contracting according to temperature; A valve disc provided on the outer periphery of a thermo-element and seated and separated from the valve seat by expansion and contraction of the thermo-element, a biasing member biasing the valve disc toward the valve seat, and supporting one end of the biasing member.
- the housing comprises a hollow main body portion having an opening at one end and having the valve seat formed therein, a pair of legs rising from the opening edge of the main body portion, and a pair of legs of the legs.
- a hook portion formed to protrude inward from the distal end portion and on which the frame is hooked is provided. and auxiliary portions positioned at both ends in the width direction of the leg, and the end surface of the engaged portion on the root side of the leg is compared with the end surface of the auxiliary portion on the root side of the leg. It is characterized in that the frame is located away from the tips of the legs and abuts on the end face of the engaged portion. According to this configuration, the hook portion at the distal end of the leg that supports the frame has, in addition to the engaged portion with which the frame is engaged, an auxiliary portion that extends in the width direction of the leg and continues to the engaged portion. ing. Therefore, when the spring load of the coil spring acts on the engaged portion, the engaged portion tends to move with respect to the auxiliary portion. is suppressed from deforming in the direction in which the
- a boundary portion between the hook portion and the leg may be R-shaped, and the side surface of the engaged portion and the end surfaces of the engaged portion and the auxiliary portion may be formed. may be R-shaped.
- both side surfaces of the engaged portion may be spaced apart toward the tip of the leg.
- the thermostat device may include a rib connecting the bases of the pair of legs.
- the base of the leg can be reinforced with the rib, so that the opening of the leg of the housing can be further suppressed.
- thermostat device of the present invention it is possible to suppress the opening of the legs of the housing and prevent the frame from falling off.
- FIG. 1 is a perspective view of a thermostat device according to one embodiment of the present invention, viewed from the distal end side of a leg.
- FIG. 2 is a bottom view of the thermostat device according to one embodiment of the present invention.
- FIG. 3 is a partial cross-sectional view of a thermostat device according to one embodiment of the present invention.
- FIG. 4(a) is a partially enlarged view showing the distal ends of the legs of the thermostat device according to the embodiment of the present invention, showing the state of the pair of legs viewed from the inside.
- FIG. 4(b) is a partially enlarged perspective view showing the engagement relationship between the distal ends of the legs and the frame shown in FIG. 4(a).
- FIG. 4(a) is a partially enlarged perspective view showing the engagement relationship between the distal ends of the legs and the frame shown in FIG. 4(a).
- FIG. 5 is a partially enlarged perspective view showing the engagement relationship between the distal ends of the legs and the frame of the thermostat device according to the first modification of the embodiment of the present invention.
- FIG. 6 is a perspective view of a thermostat device according to a second modification of one embodiment of the present invention, viewed from the distal end side of the leg.
- FIG. 7 is a perspective view of a thermostat device according to a third modified example of one embodiment of the present invention, viewed from the distal end side of the leg.
- FIG. 8 is a partial cross-sectional view of a conventional thermostat device.
- FIG. 9 is a perspective view showing an enlarged part of a conventional thermostat device.
- a thermostat device 10 according to one embodiment of the present invention will be described below with reference to the drawings.
- a thermostat device 10 according to one embodiment shown in FIGS. 1 to 7 is provided, for example, in a coolant system of an engine.
- the thermostat device 10 is provided on the inlet side or the outlet side of the engine in the cooling path connecting the radiator and the engine, and opens and closes the cooling path according to the temperature of the coolant, and the temperature of the coolant circulating in the engine to control.
- a thermostat device 10 As shown in FIG. 3, a thermostat device 10 according to an embodiment of the present invention comprises a hollow housing 1, a thermoelement 17 having one end inserted into the housing 1, and a It comprises a valve body 15 for opening and closing the cooling passage, a coil spring 16 as a biasing member for biasing the valve body 15 in the closing direction, and a frame 19 supporting one end of the coil spring 16 .
- the upper and lower sides of the thermostat device 10 shown in FIG. 3 are simply referred to as “upper” and "lower.”
- the housing 1 is made of synthetic resin.
- the housing 1 includes a substantially truncated cylindrical main body 20 having an opening 20c formed at the lower end thereof, a pair of legs 21, 21 extending downward from the lower end opening edge of the main body 20 so as to face each other, and the main body 20. and a pair of flanges 2, 2 protruding outward from the outer periphery of the lower end of the body portion 20.
- the coolant passes through the connection port 23, the inside of the main body 20, and the opening 20c, which form part of the cooling path.
- a bolt hole 2a is formed in each of the pair of flanges 2,2.
- a metal sleeve (not shown) is press-fitted into the bolt hole 2a, and a bolt (not shown) for fixing the thermostat device 10 to a mating member is inserted through the sleeve.
- the mating member here is attached to a water pump that supplies coolant to the engine.
- the mating member is a member for mounting the thermostat device on the water pump side.
- An annular groove 20d is formed in the lower opening edge of the body portion 20 positioned inside the bolt hole 2a so as to surround the opening 20c, and a gasket 25 is fitted in the groove 20d.
- the gasket 25 seals between the thermostat device 10 and the mating member, and prevents the coolant flowing inside the housing 1 from leaking to the outside when the thermostat device 10 is attached to the mating member.
- the inner side (inner side) of the gasket 25 in the body portion 20 is the inner side of the housing 1 .
- a ring-shaped valve seat 20b is formed on the inner periphery immediately above the lower end opening edge of the body portion 20 located inside the housing 1, and the valve body 15 is seated and separated from the valve seat 20b, thereby closing the cooling path. is opened and closed.
- thermoelement 17 is inserted inside the housing 1 .
- the thermo-element 17 is arranged in the axial center portion of the main body portion 20 along the axial center line.
- the thermo-element 17 includes an element case 30 in which a thermal expansion material such as wax is enclosed, and a piston 3 inserted into the element case 30 so as to be advanced and retracted.
- the piston 3 moves out of the element case 30 and the thermo-element 17 extends.
- the piston 3 enters the element case 30 and the thermo-element 17 contracts.
- the thermo-element 17 expands and contracts depending on the temperature.
- thermo-element 17 The tip of the piston 3 positioned at the upper end of the thermo-element 17 is fitted to a tubular boss 20a formed on the inside of the main body 20 and at the top. Therefore, upward movement of the piston 3 with respect to the housing 1 is prevented. Therefore, when the thermo-element 17 expands and contracts, the element case 30 moves up and down without changing the position of the piston 3 with respect to the housing 1 .
- a valve body 15 is fixed to the outer circumference of the element case 30 .
- the valve body 15 moves up and down together with the element case 30 as the thermo-element 17 expands and contracts.
- the valve body 15 moves downward, the valve body 15 is separated from the valve seat 20b, allowing the cooling liquid to pass therebetween, thereby permitting communication of the cooling path. be done.
- the thermo-element 17 contracts and the valve body 15 moves upward and is seated on the valve seat 20b, communication of the cooling passage is cut off. In this manner, the valve body 15 opens and closes the cooling path by seating and removing from the valve seat 20b.
- the upper end of the coil spring 16 contacts the back surface of the valve body 15 .
- This coil spring 16 is arranged so as to surround the thermo-element 17 .
- a lower end (one end) of the coil spring 16 is supported by a frame 19 .
- the frame 19 is caught by the tips of a pair of legs 21, 21 formed on the housing 1 and prevented from moving downward with respect to the housing 1.
- the frame 19 includes an annular spring seat portion 19d having a through hole 19a formed in the center thereof, and an engagement that protrudes from the outer periphery of the spring seat portion 19d to both sides in the diameter direction and is caught by the tip portions of the legs 21, 21. and a portion 19b.
- An element case 30 is vertically movably inserted through the through hole 19a. That is, the element case 30 can move up and down with respect to the frame 19 .
- the coil spring 16 is a compression spring and is arranged in a compressed state between the valve body 15 and the frame 19 . Therefore, the valve element 15 is urged upward (toward the valve seat 20b) by the coil spring 16. As shown in FIG. In this configuration, when the cooling liquid around the thermo-element 17 becomes hot and the thermo-element 17 expands, the valve body 15 moves downward against the biasing force of the coil spring 16 and leaves the valve seat 20b. On the other hand, when the cooling liquid around the thermo-element 17 becomes low temperature and the thermo-element 17 contracts, the valve body 15 moves upward according to the biasing force of the coil spring 16 and approaches the valve seat 20b.
- the housing 1 includes a pair of legs 21, 21; It has an arc-shaped rib 22 connecting the roots of the 21 .
- the engaging portion 19b of the frame 19 is engaged with the hook portion 21a.
- FIG. 4(a) shows an enlarged view of the hook portion 21a provided at the tip of the leg 21 as seen from the inside of the pair of legs 21, 21, and FIG. 4(b) shows the hook portion.
- 21a is an enlarged oblique view showing an engagement relationship between 21a and an engaging portion 19b of a frame 19.
- FIG. The hook portion 21a protrudes inward (toward the facing leg 21) from the distal end portion of the leg 21.
- the hook portion 21a is formed such that the portion positioned in the center of the width direction of the leg 21 has a larger vertical length than both sides thereof, and has an inverted T shape.
- the engaged portion 21a3 is positioned at the center in the width direction of the leg 21 and has a large vertical length, and the small portions positioned at both ends in the width direction of the leg 21 are auxiliary portions 21a1 and 21a2.
- the upper (base side of the leg 21) end surface c of the engaged portion 21a3 is higher than the upper (base side of the leg 21) end surfaces a, b of the auxiliary portions 21a1, 21a2 (separate from the tip of the leg 21). ) position.
- the end surface c of the engaged portion 21a3 and the end surfaces a, b of the auxiliary portions 21a1 and 21a2 are formed in different levels, and the engaging portion 19b of the frame 19 rests on the engaged portion 21a3.
- the engaging portion 19b of the frame 19 stands up from both ends of the stacking plate portion 19b3, which abuts on the end face c of the engaged portion 21a3, facing each other. and a pair of side plate portions 19b1 and 19b2 sandwiching the engaged portion 21a3 from both sides in the width direction.
- the side plate portions 19b1 and 19b2 are connected to a rib 19c standing along the outer peripheral edge of the spring seat portion 19d.
- the width of the engaged portion 21a3 of the hook portion 21a is formed wider than the sum of the widths of the auxiliary portions 21a1 and 21a2.
- the linear distance L2 from one end to the other end of the engaged portion 21a3 in the lateral width direction is the same as or slightly smaller than the interval W1 between the pair of side plate portions 19b1 and 19b2 of the engaging portion 19b (L2 ⁇ W1).
- the engaged portion 21a3 fits between the pair of side plate portions 19b1 and 19b2 without rattling.
- the height of the side plate portions 19b1 and 19b2 is equal to the height of the rib 19c. , 21a2.
- the distance W2 from the root to the tip of the side plate portions 19b1 and 19b2 is shorter than the difference L3 in the height direction between the end face c of the engaged portion 21a3 and the end faces a and b of the auxiliary portions 21a1 and 21a2 ( W2 ⁇ L3).
- the side plate portions 19b1 and 19b2 do not interfere with the auxiliary portions 21a1 and 21a2 when the engaging portion 19b of the frame 19 is engaged with the hook portion 21a.
- the inward protrusion height L5 of the hook portion 21a protruding inward from the tip of the leg 21 is set to an appropriate value in consideration of ease of assembly and engagement with the frame 19. As shown in FIG.
- Boundary portions 21a4 with the end faces a and b are rounded.
- the thermostat device 10 includes a housing 1 having a valve seat 20b formed therein and a thermostat whose one end is inserted into the housing 1 and expands and contracts according to temperature. an element 17; a valve body 15 which is provided on the outer periphery of the thermo-element 17 and is seated and separated from the valve seat 20b by the expansion and contraction of the thermo-element 17; member) 16 and a frame 19 that supports the lower end (one end) of the coil spring 19 .
- the housing 1 includes a hollow body portion 20 having an opening 20c at its lower end (one end) and a valve seat 20b formed therein, and a pair of legs 21, 21 standing from the edge of the opening of the body portion 20.
- the hook portion 21a has an engaged portion 21a3 positioned at the center of the leg 21 in the width direction, and auxiliary portions 21a1 and 21a2 connected to the engaged portion 21a3 and positioned at both ends of the leg 21 in the width direction.
- the end surface c of the engaged portion 21a3 on the root side of the leg 21 is located farther from the tip of the leg 21 than the end surfaces a and b of the auxiliary portions 21a1 and 21a2 on the root side of the leg 21. 19 contacts the end surface c of the engaged portion 21a3.
- the hook portion 21a at the tip of the leg 21 supporting the frame 19 is not only the engaged portion 21a3 with which the frame 19 engages, but also the upper end of the engaged portion 21a3.
- Auxiliary portions 21a1 and 21a2 extending in the lateral width direction of the leg 21 are provided. Therefore, when the spring load of the coil spring 16 acts downward on the engaged portion 21a3, the engaged portion 21a3 tends to move downward relative to the auxiliary portions 21a1 and 21a2, but a reaction force resisting this movement is generated. As a result, deformation in the direction in which the tips of the pair of legs 21, 21 move away from each other can be suppressed. That is, according to the above configuration, it is possible to suppress the opening of the legs 21 of the housing 1 and prevent the frame 19 from coming off.
- a boundary portion 21a5 between the hook portion 21a and the leg 21, a boundary portion 21a6 between the side surface 21a31 of the engaged portion 21a3 of the hook portion 21a and the end surface c, and the side surface 21a31 of the hook portion 21a and the end faces a, b of the auxiliary portions 21a1, 21a2 are rounded.
- concentration of stress can be prevented, and the durability of the hook portion 21a can be improved.
- Part or all of the boundary portion may be edge-shaped as long as the durability of the hook portion 21a can be ensured.
- both side surfaces 21a31, 21a31 of the engaged portion 2a3 are parallel, but this is not the only option.
- both side surfaces 21a31, 21a31 of the engaged portion 2a3 may be spaced apart toward the tip of the leg 21.
- the engaging portion 19b of the frame 19 can be easily fitted to the engaged portion 21a3 of the hook portion 21a, thereby facilitating the assembly work.
- the thermostat device 10 of the present embodiment includes ribs 22 connecting the roots of the pair of legs 21 , 21 .
- the roots of the legs 21 can be reinforced by the ribs 22, so that the opening of the legs 21 of the housing 1 can be further suppressed.
- ribs 22 may be intermittently provided, and openings S may be formed between adjacent ribs 22 , 22 .
- the opening S is provided in this way, the coolant positively passes through the opening S when the valve body 15 is opened. That is, by adjusting the position, number, and size of the openings S, the flow of the coolant can be controlled.
- the thermostat device 10 when the thermostat device 10 is arranged on the inlet side of the engine, pressure loss can be reduced by disposing the opening S toward the engine outlet side of the thermostat device 10 .
- the thermostat device 10 is arranged on the inlet side of the engine, and in addition to the connection port 23 that serves as an introduction port for the low-temperature cooling liquid that has passed through the radiator, the connection port that serves as an introduction port for the high-temperature cooling liquid that does not pass through the radiator (Fig. (not shown), the opening S may be biased toward the side of the thermostat device 10 opposite the engine outlet to improve mixing of cold and hot coolant.
- the rib 22 may be omitted.
- the thermostat device 10 when the thermostat device 10 is arranged on the inlet side of the engine and the coolant flows from the connection port 23 through the radiator, the pressure of the coolant on the connection port side causes the valve body 15 to move.
- the spring constant of the coil spring 16 In order to prevent the valve from opening, the spring constant of the coil spring 16 must be increased, and the force acting in the direction of opening the leg 21 increases. Therefore, it is particularly effective to apply the present invention to the thermostat device 10 arranged on the engine inlet side.
- the present invention may also be applied to a thermostat device arranged on the engine outlet side.
- the housing 1 of the thermostat device 10 is made of synthetic resin
- the problem of the frame 19 coming off is more likely to occur than when it is made of metal. Therefore, it is particularly effective to apply the present invention to a thermostat device whose housing is made of synthetic resin.
- the invention may also be applied to thermostat devices whose housings are made of metal.
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- General Engineering & Computer Science (AREA)
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
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- General Physics & Mathematics (AREA)
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Abstract
Description
当該構成によれば、フレームを支える脚の先端部の引掛け部が、フレームが係合する被係合部の他に、被係合部に連なって脚の幅方向へ延びる補助部を有している。このため、コイルスプリングのばね荷重が被係合部に作用すると、これに従って被係合部が補助部に対して移動しようとするが、これに抗する反力を得て、一対の脚の先端が離れる方向に変形するのが抑制される。
一対のフランジ2,2には、それぞれボルト孔2aが形成される。ボルト孔2aには、金属製のスリーブ(符示せず)が圧入され、このスリーブにサーモスタット装置10を相手側部材へ固定するためのボルト(図示せず)が挿通される。ここでいう相手側部材とは、例えば、サーモスタット装置が自動車におけるエンジンの入口側に配置される場合、サーモスタット装置は、エンジンに冷却液を供給するウォーターポンプに取り付けられる。この場合、ウォーターポンプ側のサーモスタット装置を取り付けるための部材が相手側部材である。
このハウジング1の内側に位置する本体部20の下端開口縁の直上部内周に、環状の弁座20bが形成されており、この弁座20bに弁体15が離着座することで、冷却路が開閉される。
そして、エレメントケース30周囲の冷却液の温度が上昇し、内部の熱膨張体が膨張すると、ピストン3がエレメントケース30から退出し、サーモエレメント17が伸長する。反対に、エレメントケース30周囲の冷却液の温度が低下し、内部の熱膨張体が収縮すると、ピストン3がエレメントケース30に進入し、サーモエレメント17が収縮する。このように、サーモエレメント17は、温度に応じて伸縮作動する。
サーモエレメント17の上端に位置するピストン3の先端は、本体部20の内側、頂部に形成された筒状のボス部20aに篏合する。このため、ハウジング1に対するピストン3の上方への移動が阻止される。よって、サーモエレメント17が伸縮作動すると、ハウジング1に対するピストン3の位置は変わらず、エレメントケース30が上下に移動する。
引掛け部21aは、脚21の先端部から内向きに(向かい合う脚21に向けて)突出する。引掛け部21aは、脚21の幅方向中央に位置する部分が、その両側よりも上下長が大きく形成されており、逆T字状の形状となる。この引掛け部21aにおいて、脚21の幅方向中央に位置する上下長の大きい部分が被係合部21a3、脚21の幅方向両端に位置する上下長の小さい部分が補助部21a1,21a2であり、被係合部21a3における上側(脚21の根元側)の端面cは、補助部21a1,21a2における上側(脚21の根元側)の端面a,bよりも高い(脚21の先端から離れた)位置にある。このように、被係合部21a3の端面cと補助部21a1,21a2の端面a,bは段違いに形成されており、被係合部21a3にフレーム19の係合部19bが載る。
また、サイド板部19b1,19b2の高さは、リブ19cの高さと等しく、積載板部19b3が被係合部21a3の端面cに当接した状態で、サイド板部19b1,19b2が補助部21a1,21a2の端面a,bに干渉しない長さとされる。換言すると、サイド板部19b1,19b2の根元から先端までの距離W2は、被係合部21a3の端面cと補助部21a1,21a2の端面a,bとの高さ方向の差L3よりも短い(W2<L3)。これにより、フレーム19の係合部19bを引掛け部21aに係合した状態で、サイド板部19b1,19b2は補助部21a1,21a2に干渉しない。
また、脚21の先端部から内向きに突出する引掛け部21aの内側への突出高さL5は、組み立ての容易さとフレーム19との係合性を考慮して適宜値に設定されている。
また、ハウジング1は、下端(一端)に開口20cを有して内側に弁座20bが形成される中空の本体部20と、この本体部20の開口縁から起立する一対の脚21,21と、脚21の先端部に内向きに突出するよう形成されて、フレーム19が引っ掛かる引掛け部21aとを有する。この引掛け部21aは、脚21の幅方向中央に位置する被係合部21a3と、被係合部21a3に連なり脚21の幅方向両端に位置する補助部21a1,21a2とを有する。そして、被係合部21a3における脚21の根元側の端面cは、補助部21a1,21a2における脚21の根元側の端面a,bと比較して脚21の先端から離れた位置にあり、フレーム19が被係合部21a3の端面cに当接する。
例えば、図5に示すように、被係合部2a3の両側面21a31,21a31が、脚21の先端へ向かうにしたがって離間するとしてもよい。このようにすると、サーモスタット装置10の組立の際に引掛け部21aの被係合部21a3にフレーム19の係合部19bを嵌めやすく、組立作業を容易にできる。
しかし、例えば、図6,7に示すように、リブ22が断続的に設けられ、隣り合うリブ22,22の間に開口部Sが形成されていてもよい。このように、開口部Sを設けると、弁体15が開いたときに、開口部Sを積極的に冷却液が通過する。即ち、開口部Sの位置、数、大きさを調整することにより、冷却液の流れを制御できる。
例えば、サーモスタット装置10がエンジンの入口側に配置される場合、開口部Sをサーモスタット装置10のエンジン出口側に偏らせて配置すれば、圧損を低減できる。また、サーモスタット装置10がエンジンの入口側に配置され、ラジエータを経由した低温の冷却液の導入口となる接続口23の他、ラジエータを経由しない高温の冷却液の導入口となる接続口(図示せず)を備える場合、開口部Sをサーモスタット装置10のエンジン出口と反対側に偏らせて配置すれば、低温の冷却液と高温の冷却液とのミキシングを良好にできる。なお、リブ22は、省略してもよい。
2 フランジ
2a ボルト孔
3 ピストン
10 サーモスタット装置
15 弁体
16 コイルスプリング(付勢部材)
17 サーモエレメント
19 フレーム
19b 係合部
20 本体部
20a ボス部
20b 弁座
21 脚
21a 引掛け部
21a1 補助部
21a2 補助部
21a3 被係合部
21a4 被係合部の側面と補助部の端面との境界部分
21a5 引掛け部と脚との境界部分
21a6 被係合部の側面と端面との境界部分
22 リブ
a,b 補助部における脚の根元側の端面
c 被係合部における脚の根元側の端面
Claims (5)
- 内側に弁座が形成されるハウジングと、
一端が前記ハウジングの内側に挿入されて温度に応じて伸縮作動するサーモエレメントと、
前記サーモエレメントの外周に設けられて前記サーモエレメントの伸縮作動により前記弁座に離着座する弁体と、
前記弁体を弁座側へ付勢する付勢部材と、
前記付勢部材の一端を支持するフレームと、を備え、
前記ハウジングは、
一端に開口を有して内側に前記弁座が形成される中空の本体部と、
前記本体部の開口縁から起立する一対の脚と、
前記脚の先端部に内向きに突出するよう形成されて、前記フレームが引っ掛かる引掛け部とを有し、
前記引掛け部は、前記脚の幅方向中央に位置する被係合部と、前記被係合部に連なり前記脚の幅方向両端に位置する補助部とを有し、
前記被係合部における前記脚の根元側の端面は、前記補助部における前記脚の根元側の端面と比較して前記脚の先端から離れた位置にあり、
前記フレームは、前記被係合部の前記端面に当接することを特徴とするサーモスタット装置。 - 前記引掛け部と前記脚との境界部分は、R形状であることを特徴とする請求項1に記載されたサーモスタット装置。
- 前記被係合部の側面と、前記被係合部及び前記補助部の前記端面との境界部分は、それぞれR形状であることを特徴とする請求項1または請求項2に記載されたサーモスタット装置。
- 前記被係合部の両側面は、前記脚の先端へ向かうに従って離間することを特徴とする請求項1乃至請求項3のいずれか一項に記載されたサーモスタット装置。
- 一対の前記脚の根元を繋ぐリブを備えていることを特徴とする請求項1乃至請求項4のいずれか一項に記載されたサーモスタット装置。
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JP2016008568A (ja) * | 2014-06-25 | 2016-01-18 | 日本サーモスタット株式会社 | サーモスタットバルブ |
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