JP2005240821A - Solenoid valve attachment part structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a solenoid valve attachment part structure surely preventing malfunction of a solenoid valve even at a time of high pressure wash. <P>SOLUTION: The solenoid valve 14 is arranged between a body 11 and a plate 17, and the plate 17 is fixed on the plate 17 by fastening a bolt 18. Compressed air from an input hole 51 is output from an output hole 54 to move a piston 32 upward at a time of solenoid valve operation, and compressed air in a cylinder space 31 is discharged from a discharge hole 72 via a groove 71 on a side surface of a plunger 55 at a time of non-operation. A through hole 81 communicating to the discharge hole 72 is provided on the plate 17 having surface contact on a core 56, and the through hole 81 is covered by a cover 84 on a lower surface 83 of the plate 17. Whole circumference of the cover 84 is welded on the plate 17 to form a hermetic space 86 between the plate 17 and the cover 83. A one-way type check valve 92 to discharge compressed air in the hermetic space 86 to an upper surface 19 is provided on the plate 17. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an electromagnetic valve mounting portion structure in a gear shift unit to which an electromagnetic valve is mounted.

  Conventionally, an automatic transmission is provided in a large bus or truck, and the automatic transmission is provided with a gear shift unit 701 (hereinafter referred to as GSU 701) for shifting gears, as shown in FIG. Yes.

  The body 711 of the GSU 701 is provided with a supply path 712 to which compressed air is supplied. The compressed air flowing through the main flow 713 of the supply path 712 is output by an on / off valve 715 that opens and closes the input port 714. 716 is configured to be able to output to a gear shift air cylinder. The compressed air from the air cylinder is configured to be discharged from the drain port 718 by the piston 717.

  A nozzle 722 of an electromagnetic valve 721 is inserted below the piston 717, and compressed air that has flowed through a branch 724 of the supply path 712 is supplied to the input hole 723 of the nozzle 722. The compressed air from the input hole 723 can be output to the cylinder space 726 at the base end of the piston 717 through the output hole 725, and the compressed air in the cylinder space 726 is the outer peripheral portion of the plunger 727. It can be discharged from the exhaust hole 729 of the core 728 via the.

  Thus, when the solenoid 731 is energized, the plunger 727 biased by the spring 732 is adsorbed to the core 728 side, the exhaust hole 729 is closed, the input hole 723 is opened, and the compression from the input hole 723 is performed. The piston 717 is configured to move upward with air, and the tip of the piston 717 that has moved upward comes into close contact with the on / off valve, blocks the piston tip hole, and does not flow to the drain port 718. Therefore, the compressed air of the main flow 713 can be supplied from the output port 716 to the air cylinder by closing the drain port 718 and opening the on / off valve 715.

  On the other hand, when the solenoid 731 is not energized, the plunger 727 moved upward closes the input hole 723 and opens the exhaust hole 729 so that the compressed air in the cylinder space 726 can be discharged from the exhaust hole 729. The drain port 718 is opened by the piston 717 moved downward by this, and the input port 714 is closed by the on / off valve 715, whereby compressed air supplied to an air cylinder is supplied to the output port 716 and the drain. It is configured so that it can be discharged to the outside via the port 718.

  The electromagnetic valve 721 is fixed by a plate 741 that is in contact with the core 728. The plate 741 is provided with a through hole 742 that communicates with the discharge hole 729. A cover 743 for covering is provided.

  However, in such a solenoid valve mounting portion structure, since the cover 743 covering the through hole 742 opened in the plate 741 is open to the side, water or mud when the vehicle is washed with high pressure. May enter from the exhaust hole 729 of the electromagnetic valve 721 through the through hole 742, and there is a concern that the electromagnetic valve 721 may malfunction.

  The present invention has been made in view of such conventional problems, and an object of the present invention is to provide a solenoid valve mounting portion structure that can reliably prevent malfunction of the solenoid valve even during high-pressure cleaning. It is what.

  In order to solve the above problems, in the electromagnetic valve mounting portion structure of the present invention, an electromagnetic valve having a nozzle inserted in the body of a unit is disposed between the body and a plate fixed to the body. The solenoid valve is fixed by contacting one surface of the plate to the end surface of the core provided at the base end portion of the solenoid valve, while the plate is provided with a through hole communicating with the discharge hole provided in the core. In the electromagnetic valve mounting portion structure in which a cover that covers the through hole is provided on the other surface of the plate, the peripheral edge portion of the cover is joined to the other surface of the plate over the entire circumference. A sealed space is formed between the cover and a valve for discharging the air in the sealed space to the one surface side is provided on the one surface of the plate, and the valve is connected to the outside from the sealed space. Forgiveness While, flows from the outside into the enclosed space is constituted by a one-way valve for blocking.

  That is, the through hole of the plate communicating with the discharge hole provided in the core of the solenoid valve is covered with the cover, and the cover is joined to the other surface of the plate over the entire periphery. As a result, a sealed space sealed with the cover is formed at a portion where the discharge hole communicates with the through hole. A valve for discharging the air in the sealed space to the one surface side is provided on one surface of the plate, and this valve is a one-way valve.

  For this reason, the air discharged | emitted from the said discharge hole of the said solenoid valve is discharged | emitted to the said one surface side of the said plate through the said sealed space and the said valve | bulb. Moreover, since the said valve | bulb is comprised with the one-way valve | bulb, entry of water, mud, etc. from the said valve | bulb to the said sealed space is blocked | prevented. This prevents water and mud from entering the electromagnetic valve from the discharge hole.

  As described above, in the solenoid valve mounting portion structure of the present invention, while preventing exhaustion from the discharge hole of the solenoid valve, water and mud are prevented from entering the solenoid valve from the discharge hole. be able to.

  Therefore, compared with the conventional case where the cover that covers the through hole provided in the plate is opened to the side, water, mud, or the like enters from the exhaust hole of the solenoid valve even when the vehicle is washed at a high pressure. Such a problem can be reliably prevented. Therefore, the malfunction of the solenoid valve due to the entry of water or mud can be prevented in advance.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing a gear shift unit 1 (hereinafter referred to as GSU1) having a solenoid valve mounting portion structure according to the present embodiment. The GSU1 is a gear in an automatic transmission provided on a large bus or truck. It is a system for shifting.

  As shown in FIG. 2, mounting holes 13 are provided at three locations on the lower surface 12 of the body 11 of the GSU 1, and each mounting hole 13 has a nozzle 15 provided at the tip of the electromagnetic valve 14. Is inserted (only one is shown). Plates 17 are fastened to the lower surface 12 of the body 11 via spacers 16,..., And the electromagnetic valves 14 are connected to the body 11 and the body 11. The plate 17 is fixed to the plate 17. Thereby, the upper surface 19 of the said plate 17 fastened with the said volt | bolt 18, ... is press-contacted to the base end surface of each said electromagnetic valve 14, ..., and each electromagnetic valve 14, ... is carried out. It is fixed to the GSU1.

  As shown in FIG. 3, the body 11 of the GSU 1 is provided with a supply path 21 to which compressed air is supplied, and the main flow 22 of the supply path 21 is provided at an upper portion through an input port 23. The valve chamber 24 is in communication. An on / off valve 25 is provided in the valve chamber 24 so as to be movable up and down, and a coil spring 27 is provided between the on / off valve 25 and a closing member 26 provided in the body 11. Thus, the on / off valve 25 is in a closed state in which the on / off valve 25 is seated on the upper valve seat 28 formed in the body 11 in a normal state.

  A cylinder space 31 is formed below the upper valve seat 28, and a piston 32 is provided in the cylinder space 31 so as to be movable up and down. The piston 32 is provided with a cylindrical portion 33 extending upward, and a communication hole 34... Opened laterally is provided at the proximal end portion of the cylindrical portion 33. . A coil spring 35 is provided on the outer peripheral portion of the cylindrical portion 33, and the piston 32 is urged downward.

  An output port 41 is provided at a side portion of the cylindrical portion 33, and the output port 41 is connected to an air cylinder for gear shifting (not shown). A drain port 42 is provided below the output port 41, and the drain port 42 communicates with the outside. The nozzle 15 of the solenoid valve 14 is disposed below the piston 32.

  An input hole 51 that opens to the side is formed in the nozzle 15, and the input hole 51 is connected to a tributary 52 of the supply path 21. The input hole 51 communicates with the plunger chamber 53 of the electromagnetic valve 14, and the plunger chamber 53 communicates with the lower portion of the piston 32 via the output hole 54. A plunger 55 that opens and closes the input hole 51 is accommodated in the plunger chamber 53 so as to be movable up and down, and a core 56 is disposed below the plunger 55.

  The core 56 is configured to be excited by a solenoid 61 provided on the outer peripheral portion of the plunger chamber 53, and when energized when the solenoid 61 is energized, it is biased upward by a coil spring 62. Further, the plunger 55 is sucked and moved downward.

  A groove 71 extending vertically is formed on the side surface of the plunger 55 so that the upper space and the lower space of the plunger 55 can communicate with each other. The core 56 is provided with a discharge hole 72 that is opened and closed by the plunger 55, and the discharge hole 72 opens at the base end surface of the core 56.

  Thus, when the solenoid 61 is energized, the plunger 55 is adsorbed to the core 56 to close the exhaust hole 72 and open the input hole 51, and output compressed air from the input hole 51 from the output hole 54. The piston 32 is configured to move upward, and the piston 32 that has moved upward comes into close contact with the on / off valve 25 and closes the tip end hole of the cylindrical portion 33. Therefore, there is no outflow to the drain port 42, and the piston 32 is closed. The At the same time, the cylinder part 33 is configured to be able to supply the compressed air from the main flow 22 from the output port 41 to the air cylinder by moving the on / off valve 25 upward and opening it.

  On the other hand, when the solenoid 61 is not energized, the plunger 55 moved upward closes the input hole 51 and opens the exhaust hole 72, thereby allowing compressed air in the cylinder space 31 to pass through the groove 71 on the side surface of the plunger 55. Compressed air supplied to the air cylinder by opening the drain port 42 and closing the on-off valve 25 by the piston 32 that has moved downward. Can be discharged from the drain port 42 through the output port 41 and the cylindrical portion 33.

  The plate 17 that is in contact with the end face of the core 56 at the base end of the electromagnetic valve 14 is provided with a through hole 81 that communicates with the discharge hole 72, and an O-ring 82 is provided at the outer periphery of the through hole. Is provided to ensure airtightness. The through hole 81 is covered by a cover 84 provided on the lower surface 83 of the plate 17. As shown in FIG. 1, the cover 84 is formed in a size that covers all the through holes 81 provided corresponding to the discharge holes 72 of the electromagnetic valves 14,... Provided in the body 11. As shown in FIG. 3, the peripheral portion of the cover 84 is welded to the lower surface 83 of the plate 17 by a welding portion 85 set over the entire periphery. As a result, a sealed space 86 is formed between the plate 17 and the cover 83.

  The plate 17 is provided with an exhaust hole 91 that allows the sealed space 86 to communicate with the outside. The check hole 92 that discharges compressed air in the sealed space 86 to the upper surface 19 is provided in the exhaust hole 91. Is attached.

  The check valve 92 includes a cylindrical body portion 101 fitted into the exhaust hole 91 from the upper surface 19 side, and a head portion 102 provided at the upper end portion of the body portion 101. In the head portion 102, a valve body 103 detachably seated on the upper end surface of the body portion 101 is accommodated so as to be movable up and down. The valve body 103 is urged downward by a coil spring 104. As a result, the valve body 103 closes the vertical hole 105 of the trunk portion 101 in a closed state in which the valve body 103 is seated on the upper end surface of the trunk portion 101, and the pressure in the sealed space 86 exceeds a predetermined value. When the valve body 103 is moved upward to open, the sealed space 86 communicates with the outside through the openings 106 and 107, and the compressed air in the sealed space 86 is transferred to the upper surface of the plate 17. It is comprised so that it can discharge to 19 side. That is, the check valve 92 constitutes a one-way valve according to the present invention that allows flow from the sealed space 86 to the outside but prevents flow from the outside to the sealed space 86.

  In the present embodiment having the above configuration, the through hole 81 of the plate 17 communicating with the discharge hole 72 formed in the core 56 of the electromagnetic valve 14 is covered by the cover 84, and the cover 84 is , It is joined to the lower surface of the plate 17 over the entire periphery. As a result, a sealed space 86 sealed with the cover 84 is formed at a portion where the discharge hole 72 communicates with the through hole 81. A check valve 92 for discharging the compressed air in the sealed space 86 to the upper surface 19 side is provided on the upper surface 19 of the plate 17. The check valve 92 is constituted by a one-way valve.

  For this reason, the compressed air discharged from the discharge hole 72 of the electromagnetic valve 14 is discharged to the upper surface 19 side of the plate 17 through the sealed space 86 and the check valve 92. Further, since the check valve 92 is a one-way valve, entry of water, mud, or the like from the check valve 92 into the sealed space 86 is prevented. Thereby, entry of water, mud, or the like from the discharge hole 72 into the electromagnetic valve 14 can be prevented.

  As described above, in the present embodiment, it is possible to prevent water or mud from entering the electromagnetic valve 14 from the discharge hole 72 while ensuring exhaustability from the discharge hole 72 of the electromagnetic valve 14. Can do. Therefore, compared with the conventional case where the cover covering the through hole provided in the plate is opened to the side, water, mud, and the like are discharged from the exhaust hole 72 of the electromagnetic valve 14 even when the vehicle is washed with high pressure. It is possible to reliably prevent problems such as entering. Therefore, it is possible to prevent malfunction of the solenoid valve 14 due to the entry of water or mud.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows one embodiment of this invention, (a) is a side view, (b) is a bottom view. It is sectional drawing which shows the principal part of the embodiment. It is sectional drawing to which the principal part of the embodiment was expanded. It is sectional drawing which shows the conventional gear shift unit.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Gear shift unit 11 Body 14 Electromagnetic valve 15 Nozzle 17 Plate 19 Upper surface 56 Core 81 Through-hole 83 Lower surface 84 Cover 85 Welding part 86 Sealed space 92 Check valve

Claims (1)

An electromagnetic valve having a nozzle inserted into the body of the unit is disposed between the body and a plate fixed to the body, and one surface of the plate is disposed on an end surface of a core provided at a base end portion of the electromagnetic valve. The solenoid valve is provided with a through-hole communicating with a discharge hole provided in the core, and a cover for covering the through-hole provided on the other surface of the plate In the mounting structure,
The periphery of the cover is joined to the other surface of the plate over the entire circumference to form a sealed space between the plate and the cover, and the air in the sealed space is placed on the one surface of the plate. A valve for discharging to the one surface side is provided, and the valve is configured by a one-way valve that allows flow from the sealed space to the outside while preventing flow from the outside to the sealed space. Solenoid valve mounting part structure.

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