JPS6335876B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fluid control valve device, and more particularly to a valve device in which fluid pressure is switched and loaded by manually moving a valve means as a sliding member between two positions. .

There is a need for a simple, economical switching valve that slides between two positions, but conventional valve systems, even those operated at low pressures, are made up of multiple components. Therefore, the manufacturing and maintenance costs are high.

SUMMARY OF THE INVENTION It is an object of the invention to provide a simple two-position valve system which combines a very small number of parts.

Another object of the invention is to provide a two-position valve arrangement in which the valve means is held in a selected one of two positions.

It is a further object of the invention that the valve for communicating fluid between a supply port and a selected control port of a plurality of control ports is achieved using a simple and commonly used sealing element. The purpose of this paper is to propose a two-position valve device that is capable of

It is an object of the present invention to provide a flat control surface of a barrel member having an inlet port and a plurality of outlet ports or a plurality of control ports for communicating therewith by sliding between two positions of the control surface. This is achieved by mounting movable valve means. The sliding member as the moving valve means is held by the barrel member for movement to a selected one of two positions on the planar surface. The sliding member forms a valve means provided with a sealing element which, when moved and placed in a selected one of two positions, sealingly engages the planar control surface for control. form a chamber. The valve means is moved by a manually operated lever to place it in a selected one of two positions. The supply port communicates with one control port when the selected one is disposed in the first position, and the supply port communicates with the other control port when the valve means is disposed in the second position. The lever and valve means are such that a spring seals the valve means against the control surface when the valve means is positioned in one of two selected positions. The spring also acts as an over-center mechanism to hold the sliding member, which is the valve means, in only one of two selected positions. To prevent the valve means from being inadvertently removed from a selected one of the two positions, detent means are provided on the lever.

A valve system according to one embodiment of the present invention is designated at 10 in FIG. , or the control port 16 which is the third port. The control ports 14, 16 are connected to both ends of an actuator 18, which is a double-action cylinder, via lines 66, 68 as conduits.

The valve device 10 is connected to the sliding member 2 by a manual lever 24.
2 is moved from one position of the body member 20 to another position. The body member 20 is formed with a protrusion 26 that supports and guides the sliding member 22 while it moves. A flat control surface 28 is formed on the upper surface of the substantially rectangular bottom wall of the convex portion 26 . The flat control surface 28 has the ports 14,
16 is open for communication.

As shown in FIG. 1, the sliding member 22 is cup-shaped and has a substantially rectangular retaining ring 32 protruding from its lower surface 30. As shown in FIG. The retaining ring 32 engages with the inner circumferential surface of the seal element 34 and functions to retain the seal element. The sealing element 34 consists of an endless O-ring that closely engages the control surface 28 and has a movable control chamber 36 between the lower surface of the sliding member 22 and the control surface 28.
form. The control chamber 36 is arranged so that the inlet port 13, which is a first port, and the control port 14, which is a second port, communicate with each other via the control chamber 36, as shown in FIG. In FIG. 4, control chamber 36 communicates control port 16 with inlet port 13. In FIG.

The sliding member 22 is provided with a socket 40 for receiving a projection 42 on the lower end of the lever 24. Lever 24
is pivotally supported on a support shaft 44 mounted between a wall 48 constituting the body member 20 and a lug 46 standing up from the opposing wall. A pair of collars 50 are interposed on the support shaft 44 in order to pivot the lever 24 at the center between the ear piece 46 and the wall 48. Lever 24
Stepped seats 52 are formed on opposite side edges of the lower side of the spring 52 to engage the upper end of the compression spring 54, and the lower end of the spring 54 is engaged with the bottom surface of the outer periphery of the socket 40. The compression spring then acts on the lever and the sliding member 22, causing the sliding member and the sealing element 34 to
is pressed against the control surface 28.

The body member 20 and the sliding member 22 are provided with cam means in which a cam 56 provided on a control surface on the upper surface of the body member and a cam 58 provided on the lower surface of the sliding member act complementarily. As shown in FIGS. 3 and 4, the cam 56 is protruded from the control surface at a distance from the wall 48 that stands opposite to the recess and is adjacent to the opposite wall. The cams 58 are disposed at the same spacing as the cams 56 on opposite front and rear sides of the lower surface of the sliding member 22.

In the valve device shown in FIGS. 1 and 3, the cam 58 of the sliding member is in contact with the left side of the cam 56, and the sliding member is arranged at a first position offset to the left inside the body member. . When the lever 24 swings counterclockwise about the pin 44 from the position shown in FIG. Haspring 54
After being pushed upward against the pressing force of , the cam 58 passes from the left side to the right side of the cam 56, and the sliding member 22 is moved to the second position shown in FIG. When the sliding member of FIG. 3 is in the first position,
Inlet port 13 and control port 14 communicate with each other. As shown in FIGS. 3 and 4, while the sliding member 22 moves from the first position to the second position,
The complementary cooperative action of cams 56 and 58 forces the slide member upwardly until the slide member remains parallel to control surface 28 until the second position is reached.

The body member 20 and the sliding member 22 are made of a reinforced synthetic resin material mixed with glass fibers, preferably two-thirds nylon and one-third glass fibers. The body member 20 is provided with a flange 62, and a mounting hole 64 is bored therein for fixing the device 10 with a bolt.

The operation of the valve device 10 of the present invention will be explained below. When the valve device 10 is installed in a vehicle, the fluid pressure source 12 is negative pressure obtained from the intake manifold of an internal combustion engine that transmits power to the vehicle. Further, when the sliding member 22 is placed in the first position shown in FIG. 1, negative pressure can be continuously obtained in the actuator 18. The path of such pressure fluid is from the source of pressure fluid to the control chamber 36 via a first port, inlet port 13, and further to a second port, control port 14. It is connected to the right end of the actuator 18 via a line 66 as a connected conduit. At this time, the left end of the actuator 18 is connected to the control port 16 via a line 68.
communicates with the atmosphere within the recess 26. This creates a pressure difference on both sides of the piston 70 of the actuator 18, with atmospheric pressure on the left side and negative pressure on the right side.
The piston 70 is then actuated to the right of the actuator 18. By moving the piston 70 to the left side of the actuator, the rod 72 is pushed out and extended. When it is desired to retract into the actuator 18, the lever 24 shown in FIG. The slide member then moves the seal element 34 out of tight engagement with the control surface 28 past the cam 56 to a second position at the other end of the recess 26. This results in
Inlet port 13 and control port 1 as shown in FIG.
6 is something that leads to mutual communication. As a result, inlet port 13 - control room 36 - control port 1
6 - A negative pressure source passing in communication with line 68 is generated to the left of the actuator. At the same time, the control port 14 is opened to the atmosphere, so that the differential pressure generated within the actuator moves the piston 70 to the left, causing the piston rod 72 to retract. Further, when the lever 24 is rotated in a direction opposite to the aforementioned direction, the piston 70 moves in the opposite direction, that is, to the right. During operation of the device 10 as described above,
The spring 54 continues to bias the sliding member 22 downward.
As a result, the sliding member and the sealing element have an over-center mechanism, whereby the sliding member is always placed in one of the two positions or the other, and the lever 24 is manually operated between the two positions. The state of being arranged at one of the above positions is maintained until the position is moved to the other position.

If it is desired to securely hold the sliding member in one of the two positions, push the pin 74 horizontally toward the back of the device from the upper lever portion of the lever support shaft 44. establish. The pin 74
is configured to engage with the lock pin 75. As shown in FIGS. 1 and 2, the lock pin 75 has a lower portion 76 attached to the back of the body member so as to be slidable in the vertical direction. Further, this lock pin is provided with a bent stepped portion 77 in the center and a locking portion 78 that stands upward from the stepped portion 77. When the sliding member 22 is placed at one of the two positions selected, the locking portion 78 of the lock pin 75 is configured to prevent the corresponding lever 24 from moving inadvertently due to external force. It is to engage with. When attempting to move the lever 24 to the selected other of the two positions,
The lock pin 75 is once pulled upward, and the pin 74 of the lever 24 is passed through from the lower side of the bent step 77. This moves the sliding member 22 with the sealing element into the selected other of the two positions. Then, the lock pin 75 is fixed by pushing it down so that the bent stepped part fits into the groove of the body member, and the pin 74 engages with the locking part 78 of the fixed lock pin 75, thereby preventing the lever 24 from being pressed inadvertently. Prevent rocking.

In the valve device of the present invention, a body member and a sliding member having a sealing element cooperate to form a control chamber, and a selected set of ports among a plurality of ports communicate with each other. The control room is moved and arranged. The control chamber is formed by an O-ring that is wound around and engaged with the outer peripheral surface of a retaining ring provided on the lower surface of the sliding member. The slide member can be moved from one selected position to another selected position against the bias of a spring which tends to hold the slide member in the selected position.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of a fluid control valve device according to an embodiment of the present invention, Fig. 2 is an exploded perspective view of the valve device shown in Fig. 1, and Fig. 3 is a cross section taken along line 3-3 in Fig. 1. figure,
4 is a sectional view similar to FIG. 3 showing another operating state, and FIG. 5 is a sectional view taken along line 5--5 in FIG. 3. 10...Valve device, 13...Inlet port, 14,
16... Control port, 20... Body member, 22...
Sliding member, 24... Lever, 26... Recess, 28
... flat control surface, 32 ... retaining ring, 34 ... sealing element, 36 ... control chamber, 40 ... socket,
56, 58...cam.

Claims (1)

[Scope of Claims] 1. A trunk member having a flat control surface, and a substantially rectangular retainer held on the lower surface of the trunk member so as to be able to reciprocate between a first position and a second position of the control surface. a sliding member with a protruding ring; an endless seal element comprising an O-ring attached to the retaining ring and closely engaged with the control surface; the closely engaged seal element, the control surface, and the sliding portion; a control chamber formed by a first port, a first port, a second port, and a third port that are open to the control surface, and the first port and the second port are connected to each other by a sliding member. communicate with each other via the control room when placed in the first position;
The first port and the third port are configured to communicate with each other via a control chamber when the sliding member is placed in the second position, and are located above and over the control surface having the port. A manual lever pivotally supported on the side wall of the body at intervals such that it acts as a center mechanism, and a manual lever pivotally supported on the side wall of the body at intervals such that the sliding member moves between the first position and the second position. a compression spring having both ends engaged with the lever and the sliding member to press the sliding member against the control surface, and a compression spring integrally formed with the sliding member and the control surface, respectively, to press the sliding member against the control surface When the sliding member is moved to the first position or the second position, it is tightly engaged and fixed to the control surface at the arranged position, but as the sliding member is moved on the control surface, it becomes integral with the sealing element. cam means disposed such that the sliding member is raised away from the control surface, the cam means having a plurality of arc-shaped surfaces on the control surface and a surface of the sliding member opposite the control surface. 1. A fluid control valve device characterized in that said valves are formed in a protruding manner at intervals. 2. The means for engaging and fixing the sliding member at a selected one of two positions on the flat control surface is slidably provided on the body member so as to removably engage with a pin provided on the lever. 2. The fluid control valve device according to claim 1, further comprising a lock pin.