JPS609941B2 - Brake device for work vehicles - Google Patents
Brake device for work vehiclesInfo
- Publication number
- JPS609941B2 JPS609941B2 JP56185713A JP18571381A JPS609941B2 JP S609941 B2 JPS609941 B2 JP S609941B2 JP 56185713 A JP56185713 A JP 56185713A JP 18571381 A JP18571381 A JP 18571381A JP S609941 B2 JPS609941 B2 JP S609941B2
- Authority
- JP
- Japan
- Prior art keywords
- valve
- brake
- coil
- hole
- switch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000012530 fluid Substances 0.000 claims description 5
- 230000001105 regulatory effect Effects 0.000 description 12
- ZZUFCTLCJUWOSV-UHFFFAOYSA-N furosemide Chemical compound C1=C(Cl)C(S(=O)(=O)N)=CC(C(O)=O)=C1NCC1=CC=CO1 ZZUFCTLCJUWOSV-UHFFFAOYSA-N 0.000 description 10
- 241000270666 Testudines Species 0.000 description 4
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 3
- 240000002853 Nelumbo nucifera Species 0.000 description 2
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 2
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- RZVAJINKPMORJF-UHFFFAOYSA-N Acetaminophen Chemical compound CC(=O)NC1=CC=C(O)C=C1 RZVAJINKPMORJF-UHFFFAOYSA-N 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 235000012907 honey Nutrition 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
- B60T13/66—Electrical control in fluid-pressure brake systems
- B60T13/68—Electrical control in fluid-pressure brake systems by electrically-controlled valves
- B60T13/683—Electrical control in fluid-pressure brake systems by electrically-controlled valves in pneumatic systems or parts thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
- B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
- B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
- B60T8/36—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition including a pilot valve responding to an electromagnetic force
- B60T8/3615—Electromagnetic valves specially adapted for anti-lock brake and traction control systems
- B60T8/363—Electromagnetic valves specially adapted for anti-lock brake and traction control systems in hydraulic systems
- B60T8/3645—Electromagnetic valves specially adapted for anti-lock brake and traction control systems in hydraulic systems having more than one electromagnetic coil inside a common housing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
- B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
- B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
- B60T8/46—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition the pressure being reduced by exhausting fluid
Landscapes
- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Transmission Of Braking Force In Braking Systems (AREA)
- Braking Systems And Boosters (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
- Regulating Braking Force (AREA)
Description
【発明の詳細な説明】
本発明は、コンクリートミキサ車等作業用車両のブレー
キ装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a brake device for a work vehicle such as a concrete mixer truck.
この種の作業用車両においては、道路を走行す２るとと
もに、作業現場で車両を駐車させて作業する必要から、
主ブレーキの他に、作業時中、車両をロックするための
補助ブレーキを備えたブレーキ装置を装着している。This type of work vehicle not only drives on the road, but also needs to be parked at the work site.
In addition to the main brake, the vehicle is equipped with a braking system that includes an auxiliary brake to lock the vehicle during work.
そして「従来から「 この種のブレーキ装置として「ブ
レーキ弁と、そのブレーキ弁から吐出される圧力流体を
受けて作動するブレーキ用アクチュェータと、ブレーキ
弁とブレーキ用アクチュェータとを結ぶ主ブレーキ路に
ダブルチェックバルブを介して接続する補助ブレーキ路
と〜その補助ブレーキ路に介設され、ブレーキ用アクチ
ュェー夕を圧力源に接続する第１位置および大気に接続
する第２位置に切換可能な電磁弁と、その電磁弁を切換
操作するブレーキロック操作スイッチとを備えたものが
知られている。"Conventionally," this type of brake system requires double checks on the brake valve, the brake actuator that operates in response to the pressure fluid discharged from the brake valve, and the main brake path that connects the brake valve and the brake actuator. an auxiliary brake path connected to the auxiliary brake path via a valve; Some devices are known that are equipped with a brake lock operation switch that switches a solenoid valve.
ところで、従来は、ブレーキロック用電磁弁として、通
常の３方電磁弁が用いられ、消磁時には「ブレーキ用ァ
クチュェータへの接続口を大気に接続し「ブレーキロッ
ク操作スイッチをブレーキロック側に操作すると、電磁
弁が励磁して圧力源の圧力流体をブレーキ用ァクチュェ
ータに供給して「車両にブレーキをかけ「作業をするよ
うにしているのであるが、作業中、メインスイッチ或は
ブレーキロック操作スイッチが接点不良を生じ、または
、過電流が流れてヒューズが切れ、電磁弁が消磁すると
、電磁弁が非作動位置に戻り、ブレーキ用アクチュェー
タの圧力流体が電磁弁から排出されてブレーキが弛むと
いう問題がある。By the way, in the past, a normal three-way solenoid valve was used as a brake locking solenoid valve, and when demagnetizing, ``connect the connection port to the brake actuator to the atmosphere,'' and operate the brake lock operation switch to the brake lock side. The solenoid valve is energized and the pressure fluid from the pressure source is supplied to the brake actuator to apply the brakes to the vehicle. If a defect occurs or an overcurrent flows, the fuse blows, and the solenoid valve is demagnetized, the solenoid valve returns to its non-operating position, causing the brake actuator's pressurized fluid to be discharged from the solenoid valve, causing the brake to loosen. .
特に、傾斜地に車両を停車させ作業をしているときに、
電磁弁が消磁して車両のブレーキが弛むと、地面の煩斜
により車両が突然に動き出し、非常に危険である。本発
明は、上述の欠点に鑑みてなされたものであって、ブレ
ーキロック用電磁弁が何等かの原因により消磁した場合
にも、車両のブレーキロックが弛むことのない、作業用
車両のブレーキ装置を提供することを目的とし、その特
徴とするところは、ブレーキロック用電磁弁は、ブレー
キ用アクチュヱータを圧力源に接続する第１位置に操作
する第１コイルおよびそのアクチュェータを大気に接続
する第２位置に操作する第２コイルを備えると共に、そ
の第２コイルが励磁するまで弁を第１位置に保持する保
持部材を備えたことにある。Especially when the vehicle is parked on a slope and the work is being carried out.
If the solenoid valve is demagnetized and the vehicle's brakes are relaxed, the vehicle will suddenly start moving due to the slope of the ground, which is extremely dangerous. The present invention has been made in view of the above-mentioned drawbacks, and provides a brake system for a work vehicle in which the brake lock of the vehicle does not loosen even if the brake lock solenoid valve is demagnetized for some reason. The brake locking solenoid valve has a first coil for operating the brake actuator to a first position connecting the brake actuator to a pressure source, and a second coil for connecting the actuator to the atmosphere. The present invention includes a second coil that is operated to the first position, and a holding member that holds the valve in the first position until the second coil is energized.
すなわち、第１コイルを励磁することによって電磁弁が
第１位置に切換わると「保持部材が作用して、第１コイ
ルが消磁しても弁を第１位置に保持し、第２コイルが励
磁して始めて「弁が第１位置から第２位置に切換わるよ
うにしているのでもブレーキロック操作スイッチをブレ
−キロック側に操作すると、その後に接点不良等により
第１コイルが消磁しても「ブレーキロック操作スイッチ
をブレーキ弛め側に戻し第２コイルが励磁するまでブレ
ーキが弛む心配がない。以下、本発明の一実施例につい
て図面に従って詳しく説明する。That is, when the solenoid valve is switched to the first position by energizing the first coil, the holding member acts to hold the valve in the first position even if the first coil is deenergized, and the second coil is energized. Even if the valve is set to switch from the first position to the second position, if the brake lock operation switch is operated to the brake lock side, even if the first coil is demagnetized due to a contact failure etc. There is no fear that the brake will loosen until the brake lock operation switch is returned to the brake release side and the second coil is energized.Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.
第１図は本発明の一実施例の配管。FIG. 1 shows piping according to an embodiment of the present invention.
配線接続を示す線図であり、第２図および第３図は第１
図の電磁弁を含む弁装置組立体の断面図である。 ２
第１図において「 川まブレーキ弁であって、ブレーキ
ペダル２を有しており、その入力口３，亀は配管５，６
を介して空気溜７の独立した各室に接続しており、その
送出口８９ ＠は配管１０，軍１を介して第１「第２の
ダブルチェックバルブ薄２２，１３の一方の入力口角鼠
９ 盲５に接続している。ダブルチェックバルブ官２，
竜３の出力口亀６，１７は〜配管１は 貴＠を介して
ト空気圧力を液圧に増中。変換するェァオーバハィドロ
ブ−スタ２Ｑ，２川こ接続し〜更に「 ェアオーバハィ
３ドロフースタ２０，盈１の出力口は配管２２，２３を
介して図示しない車輪のブレーキ装置に接続しており、
エアオーバハイドロフ−ス２８，２１がブレーキ用アク
チュェータを構成している。ダブルチェックバルブ１２
，１３の他方の入力３口２４，２５は通路２６，２７お
よび２８を介して、電磁弁２９の出力口３０に接続し、
その入力口３１は通路３２「所定の圧力に出力圧力を設
定する調圧弁３３「配管３４を介して空気溌７１こ接続
している。 ４３５は電源用
バツテリであって、そのマイナス端子は車体にアースさ
れ「そのプラス端子は配線３６を介してトェンジン作動
時閉じる、メインスイッチ３７の一方の端子に接続して
いる。メインスイッチの他方の端子は、駐車操作をした
とき閉じる、パーキングスイッチ３８を介して、ブレー
キロック操作スイッチ３９のＡ接点スイッチ３９Ａの一
方の端子に接続すると共に、配線４０を介してブレーキ
ロック操作スイッチ３９のＢ接点スイッチ３９Ｂの一方
の端子に接続している。スィチ３９Ａおよび３９８の他
方の端子は〜後で詳述する電磁弁２９の第１コイルおよ
び第２コイルに配線４１，４２を介してそれぞれ接続し
、第１、第２コイルの他端は配線４３を介してアースし
ている。４４は「圧力スイッチであって、電磁弁２９が
作動し〜配管２鼠こ圧力流体が供給されると作動して「
運転者にブレーキロック操作が行なわれていることを報
知する。FIG. 2 is a diagram showing wiring connections, and FIGS.
FIG. 2 is a cross-sectional view of a valve device assembly including the solenoid valve shown in the figure. 2
In Figure 1, it is a brake valve with a brake pedal 2, an input port 3, and piping 5, 6.
The outlet port 89 is connected to the independent chambers of the air reservoir 7 through the pipe 10 and the input port 89 of the first and second double check valves 22 and 13, respectively. 9 Connected to blind 5. Double check valve official 2,
Output ports 6 and 17 of Dragon 3 increase air pressure to liquid pressure through pipe 1. The output ports of the Air Over Hydro Robusta 2Q and 2 Rivers to be converted are connected to the Air Over Hydro Robusta 2Q and the Air Over Hydro Robusta 20, which are to be converted.
The air over hydraulic fluxes 28 and 21 constitute a brake actuator. double check valve 12
, 13 are connected to an output port 30 of a solenoid valve 29 via passages 26, 27 and 28,
The input port 31 is connected to a passage 32, a pressure regulating valve 33 for setting the output pressure to a predetermined pressure, and an air pipe 71 through a pipe 34. 435 is a battery for power supply, and its negative terminal is connected to the vehicle body. The positive terminal is connected via wiring 36 to one terminal of a main switch 37, which closes when the engine is operated.The other terminal of the main switch is connected via a parking switch 38, which closes when the parking operation is performed. It is connected to one terminal of the A contact switch 39A of the brake lock operation switch 39, and also connected to one terminal of the B contact switch 39B of the brake lock operation switch 39 via wiring 40.Switches 39A and 398 The other terminal of is connected to the first coil and second coil of the electromagnetic valve 29, which will be described in detail later, via wiring 41 and 42, respectively, and the other ends of the first and second coils are connected to ground via wiring 43. 44 is a pressure switch, which operates when the solenoid valve 29 is activated and pressure fluid is supplied to the pipe 2.
To notify the driver that a brake lock operation is being performed.
次に、ダブルチェックバルブ１２，軍３「電磁弁２９お
よび調圧弁８３を一体的に構成した弁装層の構造に付い
て第２図および第２図のＡ−Ａ断面図を示す第３図に従
って説明する。第２および第３図においてｔ弁装置は図
の中央部に電磁弁２９を〜その左側にダブルチェックバ
ルブ亀２３１３を、その右側に調圧弁３３をそれぞれ備
えており「共通の弁本体６０を有している。Next, FIG. 3 shows the structure of the valve layer in which the double check valve 12, the solenoid valve 29 and the pressure regulating valve 83 are integrated, and is a sectional view taken along the line A-A in FIG. In Figures 2 and 3, the T-valve device is equipped with a solenoid valve 29 in the center of the figure, a double check valve turtle 2313 on its left side, and a pressure regulating valve 33 on its right side. It has a main body 60.
弁本体６Ｑの中央部には弁孔５首９ ５２が直列に穿設
され、弁孔５１は第３図に示すとおり通孔５８９ ５４
卑 ５８を介してダブルチェックバルフ軍２，富３の弁
孔５６９ 寮７に運通し「弁孔５２は通孔５８を介して
調圧弁３８の弁孔５９１と蓮適している。Five valve holes 9 to 52 are bored in series in the center of the valve body 6Q, and the valve holes 51 have through holes 589 to 54 as shown in FIG.
The valve hole 569 of the double check valve army 2 and wealth 3 is conveyed to the dormitory 7 through the base 58, and the valve hole 52 is connected to the valve hole 591 of the pressure regulating valve 38 through the through hole 58.
通孔５３７ ５４つ 辱５および５紙まそれぞれ簾蟹図
の通路２８９ ２６，２７および３２に対応する。なお
、通孔５３の一端は宮栓６８尊こより閉じている。弁孔
覇２は「その下端が旨栓６１１こより閉じており内部に
弁ばね６２により弁座６３に対して押圧される弁部材６
４が配置されている。54 through holes 537 Correspond to the passages 289 26, 27 and 32 of the screen 5 and 5 respectively. It should be noted that one end of the through hole 53 is closed by the plug 68. The valve hole holder 2 has a valve member 6 whose lower end is closed by a stopper 611 and is pressed against a valve seat 63 by a valve spring 62 inside.
4 is placed.
また「弁孔５１内には、弁孔５１内に超動可能に欧入さ
れｔ上面に弁座６６を形成する弁座部材６１６「 およ
び弁座６５に着座可能な弁部材６７が配置されている。
弁部材６７‘ま、案内部材６８はよって上下動可能に案
内されると共に〜その下端面は「弁孔５１と５２を通過
する通孔６９および弁座部材６６１こ設けた通孔７０を
貫通して上方に伸びる弁部村６４の藤部７１の上端に当
綾し〜通常時弁座６５から雛座している。また、弁座部
材６６は弁孔５１に圧入した案内部材６８によって上方
への移動が制限されている。弁孔５１の上部に形成した
空所７２は図示していないが大気に蓮適している。電磁
弁２９の電磁部７３は図示していないが、ボルト等によ
って弁本体５０‘こ螺着されており、ケーシング７４の
下部には、固定極部７５をカシメにより固定した固定極
部材７６が配置され、ケーシング７４の内部には、外側
に第１コイル７７を「その内側に第１コイルとは巻方向
を反対方向とした第２コイル７８を備えたボビン７９が
配置され、ボビン７９の中心孔内には「プランジャ８５
を移動可能に案内するプランジャ案内筒８０が舷合して
いる。In addition, a valve seat member 616 that is movably inserted into the valve hole 51 and forms a valve seat 66 on the upper surface, and a valve member 67 that can be seated on the valve seat 65 are disposed within the valve hole 51. There is.
The valve member 67' and the guide member 68 are guided so as to be movable up and down, and their lower end faces pass through a through hole 69 passing through the valve holes 51 and 52 and a through hole 70 provided in the valve seat member 661. The valve seat member 66 is moved upward by a guide member 68 that is press-fitted into the valve hole 51. The movement of the solenoid part 73 of the solenoid valve 29 is not shown, but the space 72 formed at the upper part of the valve hole 51 is not shown, but is suitable for the atmosphere. The main body 50' is screwed on, and a fixed pole member 76 with a fixed pole part 75 fixed by caulking is arranged at the lower part of the casing 74. Inside the casing 74, a first coil 77 is attached to the outside. A bobbin 79 is provided with a second coil 78 whose winding direction is opposite to that of the first coil.
A plunger guide tube 80 that movably guides the plunger guide tube 80 is connected to the plunger guide tube 80 .
プランジャ案内筒８０の上部には、固定極部村８２にカ
シメ止めされた固定極部８１が鞍入している。８３，８
４は永久磁石であって、それぞれ固定極部材７６，８２
に当接して配置され、永久磁石８３，８４は、第１コイ
ル７７によりプランジャ８５が磁化したときプランジャ
８５が下動し、第２コイル７８により磁化したとき上勤
するよう、固定極部７５，８１に所定の同じ極性を与え
ている。A fixed pole part 81 which is caulked to a fixed pole part village 82 is inserted into the upper part of the plunger guide cylinder 80 . 83,8
4 is a permanent magnet, and fixed pole members 76 and 82, respectively.
The permanent magnets 83 and 84 are arranged in contact with the fixed pole portions 75 and 84 so that the plunger 85 moves downward when the plunger 85 is magnetized by the first coil 77 and moves upward when the plunger 85 is magnetized by the second coil 78. 81 are given the same predetermined polarity.
プランジャ案内部８０内に隊挿したプランジャ８５は、
その下端に下方に伸び弁部材６７を操作する突出部８６
を備えると共に、その上端にケーシング７４を貫通して
上方に伸びる延在部８７を備えており、その延在部８７
には、プランジャ８５の位置を手動で操作する手動操作
部８８がピン８９により固定されている。The plunger 85 inserted into the plunger guide section 80 is
A protrusion 86 extending downwardly at its lower end to operate the valve member 67
and is provided with an extending portion 87 extending upwardly through the casing 74 at its upper end, and the extending portion 87
A manual operation section 88 for manually controlling the position of the plunger 85 is fixed by a pin 89.
膜板部材９０は合成樹脂で形成されており、ケーシング
７４の上部の穴とプランジャ８５の延在部８７との間か
らケーシング７４内に水等が侵入することを防止すると
共に、ケーシング７４の上内面と固定極都材８２との間
のスベーサ−として作用している。４１，４２は、第１
コイル７７および第２コイル７８をブレーキロック操作
スイッチ３９のＡ接点スイッチ３９ＡおよびＢ接点スイ
ッチ３９８（第１図参照）に接続するりード線であり「
４３はアース用リード線である。The membrane plate member 90 is made of synthetic resin, and prevents water etc. from entering the casing 74 from between the hole in the upper part of the casing 74 and the extension part 87 of the plunger 85. It acts as a spacer between the inner surface and the fixed pole material 82. 41 and 42 are the first
This is a lead wire that connects the coil 77 and the second coil 78 to the A contact switch 39A and the B contact switch 398 (see Fig. 1) of the brake lock operation switch 39.
43 is a grounding lead wire.
次に、調圧弁３３の構造について説明する。段付き形状
に形成された弁孔５９内には、所定の張力に設定された
調圧‘よね９１によって下方に付勢されるピストン９２
が沼動可能に配置されており、調圧ばね９１の上端は、
止め具９３により抜け止めされた板９４に当接している
。通孔９５を介して弁孔５９に蓮通して設けた弁室９６
内には、弁ばね９７によって弁座９８に向って押圧され
た弁部材９９が配置され、弁部材９９の鞠部はピストン
９２の下部に穿設した孔１００内に俄入している。１０
１は、弁室９６を空気溜７（第１図参照）に接続するた
めの接続口である。Next, the structure of the pressure regulating valve 33 will be explained. Inside the stepped valve hole 59 is a piston 92 which is urged downward by a pressure regulating spring 91 set to a predetermined tension.
are arranged so as to be movable, and the upper end of the pressure regulating spring 91 is
It is in contact with a plate 94 which is prevented from coming off by a stopper 93. A valve chamber 96 is provided through the valve hole 59 through the through hole 95.
A valve member 99 that is pressed toward a valve seat 98 by a valve spring 97 is disposed therein, and the collar of the valve member 99 is inserted into a hole 100 formed in the lower part of the piston 92 . 10
1 is a connection port for connecting the valve chamber 96 to the air reservoir 7 (see FIG. 1).
更に、第３図を中心にして、ダブルチェックバルブ１２
，１３の構造について述べる。Furthermore, centering on Figure 3, double check valve 12
, 13 will be described below.
弁孔５６，５７の左端関口は、弁本体５０に螺着した蓋
部材１０３により塞がれており、その内部に、複数の通
気穴１０４，１０５を穿設した環状の弁案内筒１０６，
１０７を配設している。The left end entrances of the valve holes 56 and 57 are closed by a lid member 103 screwed onto the valve body 50, and an annular valve guide cylinder 106 with a plurality of ventilation holes 104 and 105 bored therein.
107 are installed.
弁部材１０８，１０９は、弁案内筒１０６，１０７内に
移動可能に配置され、それぞれの右端面に、通孔５４お
よび５５を囲んで形成された弁座１１０，１１１に着座
可能なシール部１１２，１１３を、それぞれの左端面に
通孔１１４，１１５を囲んで形成した弁座１１６，１１
７に着座可能なシール部１１８，１１９を形成している
。１４，１５は、通孔１１４，１ １５をブレーキ弁１
の送出口８，９に接続する入力口であり、１６，１７は
弁孔５６，５７内にェアオーバハィドロブースタ２０，
２１‘こ接続する出力口である。The valve members 108 and 109 are movably arranged in the valve guide cylinders 106 and 107, and have a seal portion 112 on the right end surface of each valve seat 110 and 111 that is formed surrounding the through holes 54 and 55. , 113 are formed on the left end faces of the valve seats 116 and 11 surrounding the through holes 114 and 115, respectively.
Sealing portions 118 and 119 are formed on the portions 7. 14, 15 connect the through holes 114, 1 15 to the brake valve 1.
16 and 17 are input ports connected to the outlet ports 8 and 9 of the air-over hydro booster 20,
21' is an output port to be connected.
以上のように構成される本発明の実施例の作用等につい
て次に説明する。車両のエンジンを始動すると、メイン
スイッチ３７は閉じられ、配線３６と配線４０とはメイ
ンスイッチ３７により接続する。Next, the operation of the embodiment of the present invention configured as above will be explained. When the engine of the vehicle is started, the main switch 37 is closed, and the wiring 36 and the wiring 40 are connected by the main switch 37.
この状態でブレーキ弁１、パーキングスイッチ３８、ブ
レーキロック操作スイッチ３９が非作動位置にあるとき
、ブレーキロック操作スイッチ３９のＢ接点スイッチ３
９Ｂが閉じ、電磁弁２９の第２コイル７８‘こは、メイ
ンスイッチ３７ｔ配線４０、Ｂ接点スイッチ３９Ｂ、リ
ード線４２を介して電流が供給され、第２コイル７８は
励磁している。それ故、プランジャ８５は固定極部８１
に吸引され、固定極部？５により反発されるので図の位
置にあり「弁部村６７が弁座６５から離弁すると共に、
弁部材６４が弁座６３に着座している、そのため「 ェ
アオーバハイドロブースタ２０，２１は配管１８，１９
、ダブルチェックバルブ１２，１３の出力口１６９ １
７を介して弁孔６６，５７内に運通し〜弁部材１０８，
１０９が図示の位置のとき、更に通孔５４および５５、
通孔５３、弁孔５竃、通孔７０、弁部材６７と弁座６５
との間、凹所７２を介して大気に蓮通して、ブレーキは
弛んでいる。夕なお「ダブルチェックバルブ亀２，１３
の弁部村１０８，１０９が右方に移動した位置にあると
きは「通孔１１４，亀亀５「入力ロー４，亀５「配管１
０，８１、ブレーキ弁１の送出口８９９、ブレーキ弁１
の排気口を通して大気に蓮適する。 Ｚ次にトブレーキ
弁１が運転者によって操作されると、ブレーキ弁１のブ
レーキペダル２の操作量に応じた圧力の圧縮空気が「そ
の送出口８，９から配管１０，１１を介してダブルチェ
ックバルフ１２，１３の入力口亀４，翼５に供給される
。そＪうすると、弁部材１０８，奪０９がその圧力に押
されて右勤し、そのシール部１１２，１富３が弁座１１
０，竃１１に着座して弁孔５６，５７と通孔５４，５５
との蓮通をそれぞれ遮断しも入力ロー４，１５に供給さ
れた圧縮空気が、弁孔５６？２５７、出力口ｉ６，１７
「配管１蟹， 竃９を介してェアオーバハィドロフース
タ２０９ ２１１こ供給され、ブ−スタ２Ｑ？ ２１で
発生した液圧が車輪のブレーキ装置に供給されて車両に
ブレーキが作用する。
２フレーキを弛めるためしブレーキ弁１のブレーキペダ
ル２を元に戻すと、ェアオーバハィドロフースタ２０，
２１１こ供給されていた圧縮空気は、配管１８，１９、
ダブルチェックバルブ貴２７亀３の出力口１６，ＩＴ、
弁孔５６？ ５７ト入力口３１４，１５、配管１０，１
１を介してブレーキ弁１の排気口よりそれぞれ排気され
、車両のブレーキが弛む。車両を停車させた後、作業を
行うためパーキングブレーキをかけ、ブレーキロック操
作スイッチ３３９をブレーキロック側に操作すると、パ
ーキングスイッチ３８およびブレーキロック操作スイッ
チ３９のＡ接点スイッチ３９Ａが閉じると共にそのＢ接
点スイッチ３９Ｂが開き〜電磁弁２９の第２コイル７８
が消磁し、第１コイル７７が励磁す多る。In this state, when the brake valve 1, parking switch 38, and brake lock operation switch 39 are in the non-operating position, the B contact switch 3 of the brake lock operation switch 39
9B is closed, current is supplied to the second coil 78' of the solenoid valve 29 via the main switch 37t wiring 40, the B contact switch 39B, and the lead wire 42, and the second coil 78 is excited. Therefore, the plunger 85 is connected to the fixed pole part 81.
Attracted to the fixed pole part? 5, so it is in the position shown in the figure.As the valve valve 67 separates from the valve seat 65,
The valve member 64 is seated on the valve seat 63, so the air-over hydro boosters 20 and 21 are connected to the piping 18 and 19.
, output port 169 1 of double check valve 12, 13
7 into the valve holes 66, 57~valve member 108,
When 109 is in the illustrated position, the through holes 54 and 55,
Through hole 53, valve hole 5, through hole 70, valve member 67 and valve seat 65
During this time, the brake is relaxed, passing through the recess 72 to the atmosphere. Yunao ``Double Check Valve Kame 2, 13
When valve parts 108 and 109 are in the position moved to the right, "through hole 114, turtle 5" input low 4, turtle 5 "piping 1"
0,81, brake valve 1 outlet 899, brake valve 1
The lotus is suitable for the atmosphere through the exhaust port. Next, when the brake valve 1 is operated by the driver, compressed air at a pressure corresponding to the amount of operation of the brake pedal 2 of the brake valve 1 is pumped from the outlet ports 8 and 9 through the pipes 10 and 11. It is supplied to the input ports 4 and blades 5 of the check valves 12 and 13. Then, the valve members 108 and 09 are pushed by the pressure and work to the right, and the seal portions 112 and 1 are closed to the valve. seat 11
0, seated on the stove 11 and the valve holes 56, 57 and the through holes 54, 55
Even if the lotus communication with the input rows 4 and 15 is cut off, the compressed air supplied to the input rows 4 and 15 flows through the valve holes 56 and 257 and the output ports i6 and 17.
The air-over hydro boosters 209 and 211 are supplied through the pipes 1 and 9, and the hydraulic pressure generated in the boosters 2Q and 21 is supplied to the brake devices of the wheels to apply brakes to the vehicle.
2 To loosen the brake, when the brake pedal 2 of the brake valve 1 is returned to its original position, the air-over hydro booster 20,
The compressed air that was being supplied by 211 was sent to pipes 18, 19,
Double check valve Ki 27 turtle 3 output port 16, IT,
Valve hole 56? 57 input ports 314, 15, piping 10, 1
1 from the exhaust port of the brake valve 1, and the brakes of the vehicle are loosened. After stopping the vehicle, applying the parking brake to perform work and operating the brake lock operation switch 339 to the brake lock side, the A contact switch 39A of the parking switch 38 and the brake lock operation switch 39 closes, and the B contact switch of the parking switch 38 and the brake lock operation switch 39 closes. 39B opens ~ second coil 78 of solenoid valve 29
is demagnetized and the first coil 77 is energized.
そのため、プランジャ８５が固定極８１から反発され固
定極部７５に吸引されて下動し「弁部材６７がプランジ
ャ８５の突出部８６により押されて弁座６５に着座して
弁孔５１と凹所７２との間の蓮通を遮断すると共に「弁
軸７翼を介して弁部材６４が弁座６３から離座し、弁孔
６翼と弁孔５２とを通孔６９を介して蓬適する。従って
「空気溜７の圧縮空気は「配管３４、調圧弁３３の接続
口亀０亀、弁室９６、弁部村９９と弁座９８との間、弁
孔５ｇ、通孔５８ト弁孔５２、通孔６９、弁孔５１、通
孔５３「および通孔５４９５５を通ってｔダブルチェッ
クバルブ亀２８ 富３の弁孔５６，５７もこ流入し、更
に出力口青ふ 富？も配管１＆ １９を介してェアオー
バハィドロブースタ２Ｑ；２川こ供給され、車両にブレ
ーキが作用する。Therefore, the plunger 85 is repelled from the fixed pole 81 and is attracted to the fixed pole part 75 to move downward, and the valve member 67 is pushed by the protruding part 86 of the plunger 85 and seats on the valve seat 65, and the valve hole 51 and the recess are moved. At the same time, the valve member 64 is separated from the valve seat 63 through the valve shaft 7 blades, and the valve hole 6 blades and the valve hole 52 are fitted together through the through hole 69. Therefore, the compressed air in the air reservoir 7 is transmitted through the piping 34, the connection port of the pressure regulating valve 33, the valve chamber 96, between the valve village 99 and the valve seat 98, the valve hole 5g, the through hole 58 and the valve hole 52. , through hole 69, valve hole 51, through hole 53, and through hole 54955, the valve holes 56 and 57 of double check valve 28 and 3 also flow in, and then the output port blue and 54955 also flow into the pipes 1 and 19. Two air-over-hydro boosters 2Q are supplied through the air-over-hydro booster 2Q, and the brakes are applied to the vehicle.
この状態で、メインスイッチ３了、パーキングスイッチ
３８、ブレーキロック操作スイッチ３９のＡ接点スイッ
チ３９Ａの接点部に接触不良を生じ「 またはも配線系
が断線して、電磁弁２ｇの第１コイル７７に電流が供給
されなくなり、第１コイル？７が消磁すると〜 コイル
７７１こよる磁力は消滅する。In this state, a contact failure occurs at the contact part of the A contact switch 39A of the main switch 3, parking switch 38, and brake lock operation switch 39. When the current is no longer supplied and the first coil 77 is demagnetized, the magnetic force caused by the coil 771 disappears.
しかし「プランジャ８５は下方位置にあり「プランジャ
蚤５の上面は固定極部轟１から離れその下面が固定極部
？５の上面に近接した位置にあるので、プランジャ８私
ま永久磁石蟹亀の磁力により磁化されその位置に保持さ
れる。従っても弁部材６７が弁座６５に着座すると共に
「弁部材８４が弁座６３から離座した状態に保ち続けら
れ、車両のブレーキが弛むことはない。なおｔエアオー
バハイドロフース夕２蟹？ ２亀に供給される圧縮空気
の圧力すなわち調圧弁３覇の弁孔富ｇ内に供給される圧
縮空気の圧力が所定値以上になると、ピストン９２が調
圧ばね９１に抗して上方に移動するため、弁部材９９が
弁ばね鯵れこ押圧されて弁座９机こ着座し、弁室９６と
弁孔６９との蓮通を遮断する。However, since the plunger 85 is in the lower position and the upper surface of the plunger flea 5 is away from the fixed pole part 1 and its lower face is in a position close to the upper surface of the fixed pole part 5, the plunger 8 is in the permanent magnet position. It is magnetized by magnetic force and held in that position.Therefore, while the valve member 67 is seated on the valve seat 65, the valve member 84 is maintained in a state separated from the valve seat 63, and the brakes of the vehicle do not loosen. In addition, when the pressure of the compressed air supplied to the Air Over Hydro Foose 2 crab, that is, the pressure of the compressed air supplied to the valve hole of the pressure regulating valve 3, exceeds a predetermined value, the piston 92 Since the valve member 99 moves upward against the pressure regulating spring 91, the valve member 99 is pressed by the valve spring and is seated on the valve seat 9, thereby blocking the communication between the valve chamber 96 and the valve hole 69.
従って〜ヱアオーバハィドロプースタ２０，２１に供給
される圧縮空気の圧力は所定の圧力に調圧される。ブレ
ーキロックを解除するため「ブレーキロック操作スイッ
チ３９を元に戻すと、Ａ接点スイッチ３９Ａが開き〜Ｂ
接点スイッチ３９８が閉じト第１コイル７７が消磁し、
第２コイル亨８が励磁する。Therefore, the pressure of the compressed air supplied to the overhydro boosters 20 and 21 is regulated to a predetermined pressure. To release the brake lock, when the brake lock operation switch 39 is returned to its original position, the A contact switch 39A opens ~ B
The contact switch 398 is closed and the first coil 77 is demagnetized.
The second coil 8 is excited.
そのため「第２コイル７８１こより〜プランジャ蜜５が
固定極部６亀に吸引され固定極部７５から反発される方
向に磁化されるので「プランジャ８５が上方に移動し、
弁部材６４が弁座６３に着座して弁孔５２と弁孔５１と
の運通を遮断すると共に、弁部材６７が弁座６５から雛
座して弁孔５１を凹所７２に蓮通し、ェアオーバハイド
ロブースタ２０，２１に供給していた圧縮空気にダルブ
チックバルブ１２，１３の弁孔５６，５７を介して大気
に放出され、ブレーキが弛む。なお、ブレーキロック操
作スイッチ３９をブレーキロックを弛める側に操作した
後、メインスイッチ３７を開放した場合には、電磁弁２
９の第２コイル７８に供給されている電流が遮断され、
第２コイル７８は消磁するが、プランジヤ８５の上端面
は、固定極部８１の下面に当俵し、その下端面は固定極
部７５から十分離れているので、プランジャ８５は永久
磁石８３の磁力により固定極部８１に吸引されてｔ上方
の位置に維持される。Therefore, the plunger honey 5 from the second coil 781 is magnetized in the direction in which it is attracted by the fixed pole part 6 and repelled from the fixed pole part 75, so that the plunger 85 moves upward,
The valve member 64 seats on the valve seat 63 to block communication between the valve hole 52 and the valve hole 51, and the valve member 67 seats from the valve seat 65 to pass the valve hole 51 into the recess 72. The compressed air that was being supplied to the Aover Hydro Boosters 20 and 21 is released into the atmosphere through the valve holes 56 and 57 of the Darbutchik valves 12 and 13, and the brakes are relaxed. Note that when the main switch 37 is opened after operating the brake lock operation switch 39 to release the brake lock, the solenoid valve 2
The current supplied to the second coil 78 of No. 9 is cut off,
Although the second coil 78 is demagnetized, the upper end surface of the plunger 85 is in contact with the lower surface of the fixed pole section 81 and the lower end surface is sufficiently far away from the fixed pole section 75, so that the plunger 85 is demagnetized by the magnetic force of the permanent magnet 83. is attracted to the fixed pole portion 81 and maintained at a position above t.
また、メインスイッチ３７を開放した後、ブレーキロッ
クをかけたい場合には、電磁弁２９の手動操作部８８を
下方に押し下げることにより、プランジャ８５を下動さ
せ、電磁弁２９を作動位置にして、ブレーキをかけるこ
とができ、かつ、手動操作部８８に加えている押力を除
いた後も、永久磁石８４の働きによって、電磁弁２９を
作動位置に保持することができ、また、ブレーキロック
を解除したい場合には、手鰯操作部８８を引き上げるこ
とによって、ブレーキロックを解除することができる。
以上説明したように、本発明によれば、ブレーキロック
操作スイッチの操作によって作動する電磁弁は、ブレー
キ用アクチュヱー夕を圧力源に接続する第１位置に操作
する第１コイルおよび、ブレーキ用アクチュェータを大
気に蓮適する第２位置に操作する第２コイルを備えると
共に、その第２コイルが励磁するまで弁を第１位置に保
持する保持部材を備えるようにしているので、ブレーキ
ロック操作中に、電磁弁を操作する電気系統に故障を生
じ電磁弁のコイルが消磁した場合にも、電磁弁は保持部
材によってその位置に保持し続けるので、ブレーキロッ
クが解除することはなく、安全性が著しく向上する。If you want to lock the brake after opening the main switch 37, push down the manual operation part 88 of the solenoid valve 29 to move the plunger 85 down and set the solenoid valve 29 to the operating position. Even after the brake can be applied and the pushing force applied to the manual operation part 88 is removed, the solenoid valve 29 can be held in the operating position by the action of the permanent magnet 84, and the brake can be locked. If it is desired to release the brake lock, the brake lock can be released by pulling up the manual operation part 88.
As explained above, according to the present invention, the solenoid valve activated by the operation of the brake lock operation switch connects the first coil that operates the brake actuator to the first position connecting the brake actuator to the pressure source, and The valve is equipped with a second coil that is operated to a second position that is exposed to the atmosphere, and a holding member that holds the valve in the first position until the second coil is energized. Even if the electrical system that operates the valve malfunctions and the solenoid valve coil is demagnetized, the solenoid valve will continue to be held in that position by the holding member, so the brake lock will not be released, significantly improving safety. .
なお、本発明は、上記の実施例に限定されるものではな
く、その技術的思想の範囲内で種々の変形が可能である
。Note that the present invention is not limited to the above embodiments, and various modifications can be made within the scope of the technical idea.
例えば、本実施例においては、ブレーキ用アクチユエー
タとしてエアオーバハイドロフース夕を用い、空気圧を
液圧に変換して液圧によりブレーキをかけるようにして
いるが、ブレーキチヤンバ等を用い、空気圧により直接
ブレーキをかけるようにしてもよく、また、電磁弁の弁
型式も公知の構造のものでよい。For example, in this embodiment, an air-over-hydro force is used as a brake actuator to convert air pressure into hydraulic pressure and apply the brakes using hydraulic pressure. The brake may be applied, and the solenoid valve may have a known structure.
第１図は、本発明の一実施例を示す配管、配線系統を示
す線図であり、第２図は、第１図に示した弁装置の具体
的構造を示す断面図、第３図は第２図の線Ａ−Ａによる
断面図である。
１・・・・・・ブレーキ弁、７・・・・・・空気溜、１
２，１３……ダブルチェックバルブ、２０，２１…・・
・エアオーバハイドロブースタ（ブレーキ用アクチユエ
ータ）、２９・…・・電磁弁、３３・・・・・・調圧弁
、３７……メインスイッチ、３８……パーキングスイッ
チ、３９・・・・・・ブレーキロック操作スイッチ、４
４…・・・圧力スイッチ、７６，８１・・・…固定極部
、７７……第１コイル、７８……第２コイル、８３，８
４・・・・・・永久磁石、８５・・・・・・プランジャ
、８８・・・…手動操作部。
第１図
第２図
第３図FIG. 1 is a diagram showing a piping and wiring system according to an embodiment of the present invention, FIG. 2 is a sectional view showing the specific structure of the valve device shown in FIG. 1, and FIG. FIG. 3 is a sectional view taken along line A-A in FIG. 2; 1... Brake valve, 7... Air reservoir, 1
2, 13...double check valve, 20, 21...
・Air over hydro booster (brake actuator), 29... Solenoid valve, 33... Pressure regulating valve, 37... Main switch, 38... Parking switch, 39... Brake lock Operation switch, 4
4... Pressure switch, 76, 81... Fixed pole part, 77... First coil, 78... Second coil, 83, 8
4...Permanent magnet, 85...Plunger, 88...Manual operation section. Figure 1 Figure 2 Figure 3
Claims (1)
流体を受けて作動するブレーキ用アクチユエータと、ブ
レーキ弁とブレーキ用アクチユエータとを結ぶ主ブレー
キ路にダブルチエツクバルブを介して接続する補助ブレ
ーキ路と、その補助ブレーキ路に介設され、ブレーキ用
アクチユエータを圧力源に接続する第１位置および大気
に接続する第２位置に切換可能な電磁弁と、その電磁弁
を切換操作するブレーキロツク操作スイツチとを備えた
作業用車両のブレーキ装置において、前記電磁弁は、そ
の弁を第１位置に操作する第１コイルおよび第２位置に
操作する第２コイルを備えると共に、その第２コイルが
励磁するまで弁を第１位置に保持する保持部材を備えて
なる作業用車両のブレーキ装置。8. A brake valve, a brake actuator that operates in response to pressure fluid discharged from the brake valve, and an auxiliary brake path connected to the main brake path connecting the brake valve and the brake actuator via a double check valve; A solenoid valve is interposed in the auxiliary brake path and can be switched between a first position that connects the brake actuator to a pressure source and a second position that connects it to the atmosphere, and a brake lock operation switch that operates the solenoid valve. In the brake device for a work vehicle, the electromagnetic valve includes a first coil for operating the valve in a first position and a second coil for operating the valve in a second position, and the electromagnetic valve does not operate until the second coil is energized. A brake device for a work vehicle, comprising a holding member that holds the brake in a first position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56185713A JPS609941B2 (en) | 1981-11-18 | 1981-11-18 | Brake device for work vehicles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56185713A JPS609941B2 (en) | 1981-11-18 | 1981-11-18 | Brake device for work vehicles |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5885750A JPS5885750A (en) | 1983-05-23 |
| JPS609941B2 true JPS609941B2 (en) | 1985-03-14 |
Family
ID=16175544
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56185713A Expired JPS609941B2 (en) | 1981-11-18 | 1981-11-18 | Brake device for work vehicles |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS609941B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6382868A (en) * | 1986-09-25 | 1988-04-13 | Isuzu Motors Ltd | Automatic brake control device with braking force holder |
| JPS6382867A (en) * | 1986-09-25 | 1988-04-13 | Isuzu Motors Ltd | Automatic brake control device with braking force holder |
| JP3925091B2 (en) * | 2001-02-28 | 2007-06-06 | 株式会社豊田自動織機 | Control valve for variable capacity compressor and method for adjusting the control valve |
| CN103192812B (en) * | 2013-03-29 | 2014-12-10 | 常州科研试制中心有限公司 | Control device of braking system of trackless rubber-tyre trailer |
| DE102014225962A1 (en) * | 2014-12-16 | 2016-06-16 | Continental Teves Ag & Co. Ohg | Brake system for motor vehicles |
-
1981
- 1981-11-18 JP JP56185713A patent/JPS609941B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5885750A (en) | 1983-05-23 |
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