JP3708466B2 - Handle operating mechanism and pilot valve - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a handle operating mechanism and a pilot valve.
[0002]
[Prior art]
Conventional pilot valves (for example, JP-A-8-82304 and JP-A-10-246342) have an operation handle supported by a biaxial universal joint using orthogonal pins, and the valve is controlled by this operation handle. ing.
[0003]
[Problems to be solved by the invention]
However, a universal joint used for a conventional pilot valve has a large number of parts and parts, and high assembly accuracy is required.
[0004]
For this reason, the cost is increased, and the size of the apparatus is restricted, so that the position of the pilot valve on the device is restricted.
[0005]
As a result, it affects not only the reliability and cost of the pilot valve, but also the mounting site and operability for equipment that requires the pilot valve.
[0006]
Accordingly, an object of the present invention is to provide a handle operating mechanism and a pilot valve that are inexpensive and small in size, have good operability, and have few restrictions on the mounting site.
[0007]
[Means for Solving the Problems]
The handle operation mechanism according to claim 1 includes an operation handle having an operation lever, and a rotation unit that supports the operation handle and allows the operation handle to rotate. A first partial spherical body having a partial sphere having a spherical surface and a base end portion of the operation handle connected to the spherical surface; and a flat surface portion that slidably contacts the flat surface portion. A partial sphere that forms one substantially spherical body, a second partial sphere having a non-rotating groove formed on the spherical surface thereof, and the substantially spherical body including the first partial sphere and the second partial sphere is rotatable. And a spherical bearing that protrudes on the concave spherical surface and has a non-rotating member that slidably engages with the non-rotating groove.
[0008]
According to the handle operating mechanism of the first aspect, the operation handle can be operated in the direction along the rotation-preventing groove of the rotating portion and the direction in which the flat portion slides. In addition, the direction and the inclination angle can be freely operated in the direction of 360 degrees, and the valve and the like can be operated and controlled via the operation lever by the operation of the operation handle. In this case, since the rotating part is composed of a member having a substantially spherical body and a concave spherical surface, the number of parts is small, the mechanism is simple, and high precision in size and shape is not required, so that the size and cost can be reduced. As a result, there are fewer restrictions on the attachment site, the operability is improved, and the application range can be expanded.
[0009]
According to a second aspect of the present invention, the handle operating mechanism according to the first aspect includes a neutral return spring that holds a neutral position of the operation handle.
[0010]
According to the handle operating mechanism of the second aspect, in addition to the same effect as that of the first aspect, the operation handle can always be held in the neutral position.
[0011]
A handle operating mechanism according to a third aspect of the present invention is the handle operating mechanism according to the second aspect, wherein the neutral return spring also serves as a return spring of a valve device operated by the operating lever.
[0012]
According to the handle operating mechanism of the third aspect, in addition to the same effect as that of the second aspect, the neutral return spring can be omitted.
[0013]
A pilot valve according to a fourth aspect has the handle operating mechanism according to the first, second, or third aspect.
[0014]
According to the pilot valve of the fourth aspect, the same effect as that of the first, second, or third aspect is obtained.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
A first embodiment of the present invention will be described with reference to FIGS. In other words, the pilot valve includes a handle operating mechanism 1 and a plurality of valves 2 operated by this mechanism. The handle operation mechanism 1 includes a rotation unit 3 and an operation handle 4.
[0016]
The rotating unit 3 supports the operation handle 4 and allows the operation handle 4 to rotate, and includes a first partial sphere 6, a second partial sphere 7, and a spherical receiver 8. The first partial sphere 6 is formed of a partial sphere having a flat portion 9, and the base end portion of the operation handle 4 is connected to the spherical surface. In the embodiment, for example, a steel ball having a diameter of 25.4 is added to a spherical surface, a flat portion 9 smaller than the radius of the sphere is formed by flat processing, and a screw hole 10 for attaching a handle is formed in a direction parallel to the flat portion 9. ing. The second partial sphere 7 is a partial sphere that has a flat surface portion 11 that slidably contacts the flat surface portion 9 and forms one substantially spherical body in a state where the flat surface portions 9 and 11 are in contact with each other. A detent groove 12 is formed. In the embodiment, a partial sphere cut and divided by the flat surface portion 9 of the first partial sphere 6 is used, and the maximum thickness is, for example, about 7 mm. Therefore, the first partial sphere 6 and the second partial sphere 7 are partial spheres having the same radius. The longitudinal direction of the anti-rotation groove 12 is a straight line having a groove width of about 4 mm parallel to the axial direction of the screw hole 10.
[0017]
The spherical receiver 8 has a concave spherical surface 13 that rotatably supports a substantially spherical body composed of the first partial spherical body 6 and the second partial spherical body 7, and is a detent that engages slidably with the detent groove 12. The member 14 protrudes into the concave spherical surface 13. The spherical surface receiver 8 according to the embodiment forms a concave portion 21 having a concave spherical surface 13 whose bottom portion is substantially equal to the radius of the spherical body at the end of a columnar body 16 such as a cylinder with a mounting collar 15. As shown, the substantially spherical body is retained by narrowing the opening edge 17 in a state where the substantially spherical body is accommodated. In the concave spherical surface 13, a base portion of a detent member 14 using a key that engages with the detent groove 12 is embedded and protrudes into the concave spherical surface 13. Then, when the second partial spherical body 7 is accommodated, the anti-rotation member 14 is engaged with the anti-rotation groove 12. The anti-rotation member 14 is provided with inclined portions 14 a on both sides of the tip portion, and prevents the groove bottom surface from colliding when the second partial spherical body 7 rotates in the direction along the anti-rotation groove 12. The same applies to the case where the bottom of the anti-rotation groove 12 is formed into an arc shape along the arc of the surface of the anti-rotation groove 12 as shown in FIG. The effect is obtained. A plurality of attachment holes 18 are formed in the attachment collar 15, and screws are fixed to the attachment holes 18 through attachment screws 19, for example, to a pedestal 20 processed with an aluminum plate.
[0018]
The operation handle 4 has an operating lever 5 and is connected to and supported by the rotating portion 3 as described above. In the embodiment, for example, a rod shape such as a round bar is formed, a square hole 22 such as a hexagon is formed on the tip surface of the head, and a screw 23 is formed on the tip portion. A jig (not shown) is inserted into the square hole 22, and the screw 23 is screwed into the screw hole 10 of the first partial sphere 6 to be connected. The actuating lever 5 has a cross shape in the embodiment, a handle insertion hole 24 is formed in a direction orthogonal to the central cross plane, and a connecting screw hole that is parallel to the cross plane and communicates with the handle insertion hole 24 on the central side surface. 25, and screw holes 26 are formed at each end, and timing adjustment screws 27 with balls are screwed into these screw holes 26, respectively. The operating handle 4 is inserted into the handle insertion hole 24, the mounting screw 28 is screwed into the connecting screw hole 25, and the tip of the operating handle 4 is pressed against the side of the operating handle 4 to connect the operating lever 5 to the operating handle 4. The operating lever 5 protrudes from a cylindrical portion 29 that extends to the outer periphery of the spherical receiver 8.
[0019]
The neutral return spring 30 holds the neutral position of the operation handle 4. In the embodiment, a coil spring is used to pass through the outer periphery of the spherical receiver 8, the lower end is supported by the attachment collar 15, and the upper end is engaged with the cylinder portion 29 of the operating lever 5. As a result, the operating lever 5 is pushed through the cylindrical portion 29 to hold the operation handle 4 in a neutral posture.
[0020]
The plurality of valves 2 include, for example, four hydraulic valves, a hydraulic switch, a sequence valve, and the like. The fixing screw portion 31 is screwed into a screw hole 32 formed around the spherical surface of the base 20 and fixed by a nut 33. The tip of the movable portion 34 is in contact with the spherical surface of the timing adjustment screw 27 with a ball.
[0021]
The operation of this pilot valve will be described. When the operation handle 4 is rotated in the direction of arrow A in FIG. 1, the anti-rotation member 14 of the rotation unit 3 slides in the anti-rotation groove 12, so the first partial sphere 6 and the second partial sphere 7. Rotate in the concave spherical surface 13 almost integrally. When the operation handle 4 is rotated in a direction perpendicular to the arrow A, that is, in a direction perpendicular to the paper surface, the second partial sphere 7 is fixed by the anti-rotation member 14, but is fixed to the flat portion 11 of the second partial sphere 7. On the other hand, the first partial sphere 6 slides and the first partial sphere 6 rotates. As a result, the operation handle 4 can be rotated in the direction of the arrow A and in a direction perpendicular thereto, but cannot be rotated around the axial direction of the operation handle 4. However, the operation handle 4 can be freely operated in a direction and an inclination angle freely in a direction of 360 degrees as well as a direction orthogonal to each other. The operation lever 5 is tilted in accordance with the operation of the operation handle 4, thereby compressing the neutral return spring 30 in accordance with the tilt amount and pushing the tilted valve 2 to control the valve 2. After the operation handle 4 is rotated, when the hand is released, the operation handle 4 returns to the neutral posture by the restoring force of the neutral return spring 30.
[0022]
A second embodiment of the present invention will be described with reference to FIGS. The difference from the first embodiment is that a screw hole 36 is formed in the center of the spherical surface receiver 8 and is fixed to the screw hole 36 through the screw 37 from the pedestal 20 side. A pair of pins as shown in FIG. 6C is used as the anti-rotation member 14, and the tip of each tip is less likely to collide with the bottom of the groove when the second partial sphere 7 rotates in the direction along the anti-rotation groove 12. In this way, inclined portions 14a opposite to each other are formed. 2C, the bottom of the anti-rotation groove 12 is formed in an arc shape along the arc of the surface of the anti-rotation groove 12 so that the end face of the anti-rotation member 14 is aligned straight or has a concave curved surface. Even when formed in the same manner, the same effect is obtained. As shown in FIG. 6A, for example, a spherical pressing plate 38 of an annular disk is placed on the opening edge 17 without being processed to narrow the opening edge 17 at the tip of the spherical receiver 8, and the mounting hole 39 of the spherical pressing plate 38 is inserted. The screw 40 is screwed into and fixed to the screw hole 41 formed in the attachment collar 15, and the tapered chamfered portion 38 a at the tip of the spherical pressing plate 38 is in contact with the surface of the substantially spherical body. The neutral return spring 30 is omitted, and the return spring of the valve 2 is also used. A part of the valve 2 is omitted, a fixed portion 42 fixed to the base 20, a return spring 43 using a coil spring having one end engaged with the fixed portion 42, and the other end of the return spring 43 is engaged and returned. A timing adjusting screw 44 that operates the movable part of the valve 2 against the spring 43 is shown. The tip of the timing adjusting screw 44 is screwed into the screw hole 26 of the operating lever 5 and is fastened and fixed by tightening with a nut 45.
[0023]
In the present invention, the handle operating mechanism can be applied to operations other than valves. Further, the neutral return spring may be omitted when it is not necessary for operation. The flat portions 9 and 11 of the first partial sphere 6 and the second partial sphere 7 are flat processed to form a lubrication surface. However, wear resistance and lubricity are preferable, and other members such as resin members are provided on the flat portions 9 and 11. May be provided.
[0024]
In addition to the steel balls, the first partial sphere 6 and the second partial sphere 7 may be, for example, a resin such as engineering plastic, or may be separate members. In addition, one sphere is cut and divided by a cutting machine to form a first partial sphere 6 and a second partial sphere 7, and a spacer having a thickness scraped off by the cutting machine is interposed between the flat portions 9 and 11. But you can. At this time, the spacer is preferably formed of a material suitable for lubricity and wear resistance, such as brass.
[0025]
【The invention's effect】
According to the handle operating mechanism of the first aspect, the operation handle can be operated in the direction along the rotation-preventing groove of the rotating portion and the direction in which the flat portion slides. In addition, the direction and the inclination angle can be freely operated in the direction of 360 degrees, and the valve and the like can be operated and controlled via the operation lever by the operation of the operation handle. In this case, since the rotating part is composed of a member having a substantially spherical body and a concave spherical surface, the number of parts is small, the mechanism is simple, and high precision in size and shape is not required, so that the size and cost can be reduced. As a result, there are fewer restrictions on the attachment site, the operability is improved, and the application range can be expanded.
[0026]
According to the handle operating mechanism of the second aspect, in addition to the same effect as that of the first aspect, the operation handle can always be held in the neutral position.
[0027]
According to the handle operating mechanism of the third aspect, in addition to the same effect as that of the second aspect, the neutral return spring can be omitted.
[0028]
According to the pilot valve of the fourth aspect, the same effect as that of the first, second, or third aspect is obtained.
[Brief description of the drawings]
FIG. 1 is a schematic cross-sectional view of a first embodiment of the present invention.
2A is a perspective view of a first partial sphere, FIG. 2B is a perspective view of a second partial sphere, and FIG. 2C is a sectional view of a modified embodiment;
FIG. 3 is a perspective view of a spherical receiver.
4A is a perspective view of an operation handle, and FIG. 4B is a perspective view of an operating lever.
FIG. 5 is a schematic cross-sectional view of a second embodiment.
6A is a perspective view of a spherical pressing plate, FIG. 6B is a perspective view of a timing adjustment screw, and FIG. 6C is a perspective view of a detent pin.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Handle operation mechanism 2 Valve 3 Rotating part 4 Operation handle 5 Actuation lever 6 1st partial sphere 7 2nd partial sphere 8 Spherical surface receiver 9 Plane part 11 Plane part 12 Rotation prevention groove 13 Concave sphere 14 Rotation prevention member 30 Neutral Return spring 43 Return spring

Claims (4)

An operating handle having an operating lever; and a rotating portion that supports the operating handle and allows the operating handle to rotate. The rotating portion includes a partial sphere having a flat portion, and the operation surface is arranged on the spherical surface. A first partial sphere that connects the proximal end portions of the handle and a partial sphere that has a flat portion that is slidably in contact with the flat portion and that forms one substantially spherical shape in a state where the flat portions are in contact with each other. A second partial sphere having a non-rotating groove on the spherical surface, and a concave spherical surface that rotatably supports the substantially spherical body composed of the first partial sphere and the second partial sphere. A handle operating mechanism, comprising: a spherical support having a non-rotating member slidably engaged with a stop groove and protruding from the concave spherical surface. The handle operating mechanism according to claim 1, further comprising a neutral return spring that holds a neutral position of the operation handle. The handle operating mechanism according to claim 2, wherein the neutral return spring also serves as a return spring of a valve device that is operated by the operating lever. A pilot valve having the handle operating mechanism according to claim 1, 2 or 3.

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