JP3655280B2 - Valve operating machine and pilot valve equipped with it - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
TECHNICAL FIELD The present invention relates to a valve operating machine and a pilot valve for controlling a working machine optionally attached to a construction machine or an industrial machine, and more specifically, a valve operating machine capable of adjusting specifications according to the working machine and a pilot valve equipped with the same. It is about.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, construction machines, industrial machines, and the like (hereinafter collectively referred to as “construction machines”) are manufactured according to work purposes. On the other hand, such a construction machine or the like may be provided with various attachments (hereinafter referred to as “work machine”) as an option so that various work other than the normal work mode can be performed. For example, in the case of a hydraulic excavator that is a construction machine, a breaker is attached in place of the excavator when performing operations such as crushing asphalt in addition to the normal operation of transporting and discharging loose materials with an excavator. In the case of a gripping operation, a nibler is attached instead of the shovel.
[0003]
Such work machines are often installed by remodeling by an optional equipment manufacturer after the hydraulic excavator is completed. When remodeling, the pilot valve for operation is installed in the driver's seat together with the optional equipment. Has been added.
[0004]
The pilot valve controls a main control valve that operates various optional devices, and controls the opening and closing of the main control valve with control oil from the pilot valve, thereby causing the work implement to perform a predetermined operation.
[0005]
As a conventional technique related to this type of pilot valve, as shown in a side view of the hydraulic pilot valve in FIG. 7, the operation stroke end position of the operation lever 51 for operating the hydraulic pilot valve can be adjusted with a shim 52. By adjusting the height position to be adjustable, the operation stroke end position where the projecting piece 54 inclined together with the operation lever 51 contacts the bolt 53 is adjusted, and the maximum pressure of the pressure oil output from the pilot valve is changed. (For example, refer to Patent Document 1).
[0006]
[Patent Document 1]
Utility Model Registration No. 25582656 Gazette [0007]
[Problems to be solved by the invention]
However, the operating pressure of the work machines described above varies depending on the types and specifications, and the construction machines and the like of each company to which these work machines are attached have various specifications. Therefore, a pilot valve for operating these work machines. There are many cases where the pressure characteristics of are different specifications. For this reason, optional equipment manufacturers, etc. must produce pilot valves that have different pressure characteristics on construction machines, etc. of each company and that can be operated appropriately for the work equipment to be installed, according to the difference in specifications. .
[0008]
In addition, since the driver's seat where such a pilot valve is installed varies depending on the construction machine of each company, the space where a pilot valve can be newly installed is limited, and the pilot valve is installed at either the left or right position. It is various. For this reason, optional equipment manufacturers and the like can handle left and right mounting by separately manufacturing left side mounting and right side mounting.
[0009]
However, when manufacturing pilot valves with different pressure characteristics in this way, or when manufacturing separate left and right pilot valves, the number of pilot valves increases, and different pilot valves must be used according to the machine and work implement. In addition, management and manufacturing of the pilot valve is expensive, and complicated selection and installation work must be performed.
[0010]
On the other hand, the work machine as described above is not always used, and is not always equipped with the same work machine, and is removed or replaced according to work. Therefore, pilot valves for operating various work machines that perform various tasks in this way should not be operated when the work machine is removed, and only when the work machine is installed. Accordingly, it is necessary to change the specification so that it can be operated in both directions or in one direction. For example, when the above-described breaker is attached, only one operation is possible, and when the above-mentioned nibler is attached, the bidirectional operation is adjusted.
[0011]
In addition, in the thing of the patent document 1 mentioned above, although the stroke end position of the operation lever 51 can be adjusted, it cannot respond rapidly to the change of the various operation states of the operation lever 51, or the operation range.
[0012]
[Means for Solving the Problems]
Therefore, in order to solve the above problems, the valve operating device of the present invention comprises an operating means for adjusting the flow passage opening of the valve body by tilting, and a tilt angle regulating means for regulating the tilt angle of the operating means. And the operation means is composed of a support member that adjusts the opening of the flow path of the valve body, and an operation member that tilts integrally with the support member, and the tilt angle regulating means is arranged on the valve body side. And a tilt angle determining portion that tilts together with the support member. The tilt restricting portion includes a restrained state that suppresses tilting of the operating member, and the operating member within a predetermined angle range. It is composed of a plunger that can be switched between a tilting state that allows tilting to be tilted in one or both directions and a tilting state that does not restrict the operating member, and the tilting angle determining portion abuts on the rod member of the plunger. An adjusting member for adjusting the tilt angle range is provided, it is provided a rod member of said plunger and tilting center of the support member on the vertical axis. As a result, it is possible to easily adjust the tilt angle range of the operating means for adjusting the flow path opening of the valve body, and the fixing and tilting direction of the operating means as desired. Accordingly, since the tilt angle range of the operating means can be adjusted according to the specifications and pressure characteristics that differ depending on the construction machine and the work machine, it is possible to deal with various specifications and pressure characteristics with the same valve operating machine. In addition, since the rod member of the plunger, which is the tilt restricting part, and the tilt center of the support member are provided on the vertical axis, it can be mounted on the valve body in the reverse direction, corresponding to both the left and right positions of the operating member can do. Thereby, the kind of pilot valve can be reduced, the cost required for management and manufacturing of the pilot valve can be reduced, and the pilot valve can be easily selected and installed.
[0013]
Furthermore, the adjustment member can arbitrarily adjust the tilt angle range between the tilt regulating portions that regulate the tilt of the operation means.
[0014]
The support member for actuating the valve body because the operation member is separately, it is possible to facilitate the mounting of the valve operating device.
[0015]
Furthermore, the inhibited state of fixing the tilting of the operation member, since the switching between the tilting state of allowing tilt the operating member at a predetermined angle can be easily changed by a plunger, operated in accordance with attachment and detachment state of the working machine member Can be quickly switched between the tilted state and the restrained state.
[0016]
In addition, if the adjustment member is configured with an adjustment bolt that abuts on the tilt restriction portion and can be moved back and forth in the direction of adjusting the tilt angle range, the tilt angle range of the operation member can be easily adjusted with a general tool such as a spanner. Therefore, the tilt angle range of the operation member can be easily adjusted even at the work site.
[0017]
On the other hand, in the pilot valve of the present invention, any one of the above-described valve operating devices is provided on the upper portion of the valve body. Accordingly, it is possible to configure a pilot valve that can easily adjust the control oil amount, the fixing of the operation means, the tilt direction, the tilt angle, and the like. Therefore, since the tilt angle of the operating means can be adjusted according to the specifications and pressure characteristics that differ depending on the construction machine and the work machine, various specifications and pressure characteristics can be handled with the same pilot valve.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a side view of a pilot valve showing an embodiment of the present invention, FIG. 2 is a front view of the pilot valve, FIG. 3 is a plan view of the pilot valve, and FIG. It is. 1 to 3 show a pilot valve, and FIG. 4 shows only a valve operating machine. In the following embodiment, an operation pedal is taken as an example of the operation member, and an example in which the operation pedal is tilted in the front-rear direction with the left in the state shown in FIG. 1 as the front and the right as the rear will be described.
[0020]
As shown in FIGS. 1 and 2, a mounting flange 2 is provided on the upper portion of the valve body 1, and the valve body 1 is attached to the floor 3 of the driver's seat by the mounting flange 2. An operation member 4 that opens and closes an oil passage provided inside the valve body 1 is provided on the upper part of the valve body 1 so as to protrude. The actuating member 4 is provided so as to be tiltable about a tilt center O which is an axis orthogonal to the paper surface of FIG. As shown by a two-dot chain line shown in FIG. This tilting center O is provided substantially at the center of the valve body 1 in the front-rear direction. Further, the operating member 4 is protected from surrounding dust and the like by a bellows-like dustproof cover 5.
[0021]
A support member 6 constituting operation means is fixed to the upper part of the operating member 4. The support member 6 is fixed by bolts 8 to bolt holes 4 a provided in the upper part of the operating member 4. The fixed support member 6 can be tilted in the front-rear direction around the tilt center O together with the operation member 4.
[0022]
An operation pedal 7 is attached to the upper portion of the support member 6. The operation pedal 7 has a substantially V-shaped upper surface, and a mounting bracket 9 projects from the lower surface of the depressed central portion. The mounting bracket 9 is fixed to the support member 6 with bolts 10, thereby forming an operation means in which the operation pedal 7 and the support member 6 are integrated. As described above, since the support member 6 is fixed integrally with the operation member 4 in the operation pedal 7, if the operation pedal 7 is tilted, the operation member 4 is tilted integrally.
[0023]
As shown in FIGS. 2 and 3, a tilt angle determining portion 11 that regulates the tilt angle of the support member 6 is provided on one side of the support member 6. The angle determining portion 11 is provided with a projecting portion 12 projecting from the front and rear of one side surface of the support member 6 and an adjusting bolt 14 screwed into the screw portion 13 of the projecting portion 12.
[0024]
As shown in FIG. 4, the adjusting bolt 14 is screwed into the threaded portions 13 of the projecting portions 12 projecting from the front and rear of the support member 6 from the front and rear toward the space between the projecting portions 12. . The adjusting bolt 14 is positioned by the fixing nut 15 by adjusting the amount of protrusion of the adjusting bolt 14 into the space between the protruding portions 12. FIG. 4 shows an example adjusted so that the operation pedal 7 can be tilted only forward.
[0025]
On the other hand, as shown in FIGS. 2 and 3, the mounting flange 2 at the upper part of the valve body 1 is provided with a tilt restricting portion 16 projecting to one side. The tilt restricting portion 16 includes an L-shaped bracket 17 that is fixed to the mounting flange 2 and a plunger 18 that is attached to the upper portion of the bracket 17. The plunger 18 is provided so as to be positioned on the axis of the adjusting bolt 14. In this embodiment, an index plunger capable of setting three positions is employed for the plunger 18.
[0026]
The index plunger 18 has a rod member 20 that slides inside a cylindrical guide member 19, and is fixed to the rod member 20, and the rod member 20 is inserted into a fixing hole 21 provided in the support member 6. Alternatively, a handle member 22 to be detached is provided. The fixing hole 21 is located on the axis of the adjusting bolt 14 and is provided in a direction perpendicular to the axis.
[0027]
Further, a slide groove 23 is formed in the axial direction of the guide member 19 for sliding the handle member 22, and three fixing grooves 24a, 24b, 24c in the circumferential direction are formed at the center and both ends of the slide groove 23. Is formed. The position of the rod member 20 can be fixed by tilting the handle member 22 sideways toward the fixing grooves 24a, 24b, and 24c.
[0028]
As shown in FIG. 5 (a), when the rod member 20 is moved forward and the handle member 22 is tilted sideways at the position where it is inserted into the fixing hole 21 and locked in the fixing groove 24a, the operating pedal 7 is locked. . Further, as shown in FIG. 5 (b), the rod member 20 is slightly retracted, the tip of the rod member 20 is detached from the fixing hole 21, and the position is present between the axis of the adjusting bolt 14 and the opening of the fixing hole 21. The state where the handle member 22 is locked in the fixing groove 24b is the half-locked state of the operation pedal 7. In this state, the tilt of the operation pedal 7 is limited where the tip of the adjustment bolt 14 contacts the rod member 20. This contact position can be adjusted by changing the screwing amount of the adjusting bolt 14. Further, as shown in FIG. 5 (c), when the rod member 20 is retracted and the handle member 22 is locked to the fixing groove 24c at a position where the tip thereof is located behind the adjustment bolt 14 (displaced position). Then, the operation pedal 7 is in an open state, and the operation pedal 7 is not subject to the tilt restriction by the plunger 18.
[0029]
Therefore, the adjustment bolt 14 is provided so as to be positioned on the axis line by adjusting the amount by which the tip of the adjustment bolt 14 protrudes inwardly from the protruding portion 12 in the half-locked state shown in FIG. The tilt angle range in which the rod member 20 provided on the fixed plunger 18 and the end of the adjustment bolt 14 of the support member 6 abut can be arbitrarily adjusted. That is, since the stopper position of the angle at which the actuating member 4 tilts can be adjusted steplessly, the tilt angle range of the operation pedal 7 and the tilting position in the front-rear direction (stroke end position) can be adjusted in construction machines having different specifications depending on the company. By adjusting, an appropriate pressure characteristic can be easily set.
[0030]
As described above, the stopper structure portion that regulates the tilt angle using the support member 6 and the plunger 18 is compactly integrated, thereby reducing the number of parts and facilitating handling such as cost and management. .
[0031]
By the way, as shown in FIG. 1, the tilting center O that supports the support member 6 that supports the operation pedal 7 described above so as to be tiltable is provided on a substantially vertical axis V line of the valve body 1. Further, the rod member 20 of the plunger 18 provided so that the adjustment bolt 14 provided on the support member 6 contacts is also provided on the vertical axis V line (FIG. 4) substantially at the center of the valve body 1. . That is, the support member 6 and the plunger 18 are provided at the center in the front-rear direction of the valve body 1 as illustrated.
[0032]
As a result, the tilt restricting portion 16 can be selectively attached to either the left or right position of the pilot valve 25.
[0033]
That is, the support member 6 is removed from the operating member 4, the operation pedal 7 is removed from the support member 6, the support member 6 is mounted so as to be reversed so that the direction of the fixing hole 21 is reversed left and right, and provided on the valve body 1. By removing the bracket 17 of the tilt restricting portion 16 from the mounting flange 2 and reversing it and fixing it to the mounting flange 2 of the valve body 1, the tilt restricting portion 16 is shown in FIG. 3 described above as shown in FIG. The pilot valve 25 provided in the direction opposite to the left and right of the pilot valve 25 can be configured.
[0034]
As described above, the tilt restricting portion 16 protruding in the lateral direction from the valve body 1 can be selectively attached at either the left or right position, so that even when the attachment direction is restricted in space, it can be easily handled. In addition, since the tilt restricting portion 16 can be provided on the side that is easy to operate depending on the operator's preference, the type and increase of the pilot valve 25 and the complexity of management are improved, the workability is improved, and the cost is reduced. Etc. can be achieved.
[0035]
According to the valve operating device 26 configured as described above, since the range of the tilt angle of the operation pedal 7 (operation member) can be regulated by the adjusting bolt 14, the tilt angle range of the operation pedal 7 can be arbitrarily set steplessly. By adjusting the position, it can easily correspond to the preferred setting according to the hydraulic characteristics etc. according to the industrial machine etc. (hydraulic excavator) with different specifications, increasing the number of pilot valves and complicated management It is possible to improve, improve workability, reduce costs, and the like.
[0036]
In addition, since the tilt angle range of the operation pedal 7 (operation member) can be easily adjusted, the pressure characteristics can be easily adjusted in the field according to the preference of the operator or the like.
[0037]
Therefore, if a valve operating device 26 that can cope with the maximum pressure among various working machines is manufactured, this valve operating machine 26 is adjusted according to the various working machines to be used, so that one type of valve operating machine is used. 26 can cope with specifications of various working machines and construction machines. In addition, since the valve operating device 26 can be easily adjusted in accordance with the work machine, adjustments by various optional equipment manufacturers and on-site adjustment can be easily performed.
[0038]
Further, the support member 6 provided with the projecting portion 12 constituting the tilt angle determining portion 11 of the tilt angle regulating means and the plunger 18 constituting the tilt regulating portion 16 provided on the valve body 1 are substantially at the center of the valve body 1. Can be reversed and attached to the left and right parts, so that by attaching them in the opposite direction, the protruding direction of the plunger 18 protruding to the side of the pilot valve 25 is reversed, so that it can be placed on either side of the driver's seat. Since it can be mounted, it can be flexibly adapted to mounting on either the left or right position in an industrial machine or the like with a different driver's seat, and it is possible to expand the number of applicable models with one pilot valve 25.
[0039]
In the above-described embodiment, an example is shown in which the index plunger 18 capable of setting three positions is used. However, if a plunger capable of setting at least two positions of the lock position 24a and the half lock position 24b is used, the half lock By retracting the position of the adjusting bolt 14 to the maximum at the position 24b, the function of the open position 24c can be achieved. What is necessary is just to determine these suitably according to use conditions etc.
[0040]
In addition to such an index plunger 18, a member that can set the lock position and the open position of the operation member may be provided as a configuration of the tilt angle restricting means, and is not limited to the above-described embodiment.
[0041]
Furthermore, the above-described embodiment is an embodiment, and various modifications can be made without departing from the scope of the present invention, and the present invention is not limited to the above-described embodiment.
[0042]
【The invention's effect】
The present invention is implemented in the form described above, and has the following effects.
[0043]
The same valve operating machine can be used by adjusting the tilt angle of the operating means according to the specifications and pressure characteristics that differ depending on the construction machine, etc., and the work machine, reducing the number of pilot valves and the cost required for pilot valve management and manufacturing And the pilot valve selection / installation work can be facilitated.
[Brief description of the drawings]
FIG. 1 is a side view of a pilot valve showing an embodiment of the present invention.
FIG. 2 is a front view of the pilot valve shown in FIG.
FIG. 3 is a plan view of the pilot valve shown in FIG.
4 is a view on arrow A shown in FIG.
5A and 5B are schematic views showing a usage state of the fixing hole shown in FIG. 2, in which (a) is a locked position, (b) is a half-locked position, and (c) is a sectional view in plan view showing an open position.
6 is a plan view showing a state in which the valve operating device of the pilot valve shown in FIG. 1 is reversed. FIG.
FIG. 7 is a side view showing a conventional hydraulic pilot valve.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Valve body 2 ... Mounting flange 3 ... Floor surface 4 ... Actuating member 5 ... Dust-proof cover 6 ... Support member 7 ... Operation pedal 8 ... Bolt 9 ... Mounting bracket 10 ... Bolt 11 ... Angle determination part 12 ... Projection part 13 ... Screw Part 14 ... Adjustment bolt 15 ... Fixing nut 16 ... Tilt restricting part 17 ... Bracket 18 ... Plunger 19 ... Guide member 20 ... Rod member 21 ... Fixing hole 22 ... Handle member 23 ... Slide groove 24 ... Fixing groove 25 ... Pilot valve 26 ... Valve actuator O ... Tilt center V ... Vertical axis

Claims (3)

An operating means for adjusting the flow opening of the valve body by tilting and a tilt angle restricting means for controlling the tilt angle of the operating means are provided, and the operating means is used to adjust the flow opening of the valve body. And an operation member that tilts integrally with the support member, the tilt angle restricting portion that is fixed to the valve body side, and a tilt angle determining portion that tilts together with the support member. And a tilting state in which the tilt restricting portion is configured to prevent tilting of the operation member, a tilt state in which the operation member is tilt-regulated within a predetermined angle range and tiltable in one or both directions, and the operation It is composed of a plunger that can be switched to a tilting state that does not restrict the member, and an adjustment member that abuts against the rod member of the plunger and adjusts the tilting angle range is provided at the tilting angle determining portion, and the tilting of the support member is provided. Center a valve operating device provided with a rod member on the vertical axis of the plunger. The adjusting member, the valve operating device according to claim 1, characterized by being configured in a retractable adjusting bolt in a direction to adjust the tilt angle range in contact with the tilt regulating part. Pilot valve, wherein a claim 1 or claim 2 Symbol mounting of the valve operating device, attached to the upper portion of the valve body.

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