JP2009277070A - Cover for operator device, and operation valve device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cover which hardly comes off even when an operation control lever is operated. <P>SOLUTION: A concave section 64 to be fit into an internal edge section of a box opening 67 is formed along the edge section of a cover opening 62 at a console box 33 side of a cover body 63. A plurality of protruding parts 65 protruding toward the outside face of a remote control valve 34, which can be engaged with the external face of a remote control valve 34, are formed at the back side of the concave section 64. The concave section 64 side is regulated from being deformed to come off inward with respect to the box opening 67 by the contact of the top end side of each protruding part 65 and the remote control valve 34. Thus, the cover is prevented from coming off even when the operation control lever 35 is operated. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an operating body device cover fitted from an operating shaft portion to a storage portion, and an operating valve device including the same.

  2. Description of the Related Art Conventionally, for example, a hydraulic excavator as a work machine is provided with an upper swing body that can be swung by a swing motor of a swing section in a lower traveling body that includes a travel motor. The arm is pivotally supported at the tip of the boom so as to be pivotable inward and outward by the arm cylinder, and the bucket is pivoted in the opening and closing direction by the bucket cylinder. It is supported freely.

  In such a hydraulic excavator, it is a movable valve body of a pilot-operated main control valve that controls the operation of a fluid pressure (hydraulic) actuator such as a travel motor, a swing motor, a boom cylinder, an arm cylinder, and a bucket cylinder. Stem for traveling, turning stem, boom stem, arm stem, bucket stem.Each of these stems is generally a hydraulic pilot control valve (operating valve operated by lever or pedal). Pilot operation by remote control valve).

The remote control valve that operates the boom cylinder, arm cylinder, bucket cylinder, etc. is housed in a console box, which is a storage section provided on the side of the seat, and an operation lever that is an operation shaft protruding from the remote control valve Thus, it is operated by the operator. In such a configuration, in order to prevent moisture and dust from entering the remote control valve while ensuring the operability of the operation lever, a flexible bellows-like cover, that is, a boot, extends from the console box to the operation lever. Installed. This boot is formed in a substantially cylindrical shape with both ends open, and a recess that fits with the inner edge of the projecting opening formed in the console box is formed along the opening edge on the lower end side of the boot. The operation lever is inserted through the opening on the upper end side (see, for example, Patent Documents 1 to 3).
JP 2003-122441 A (page 3, FIG. 1) JP-A-6-16062 (page 2-3, FIG. 5) Utility Model Registration No. 2552519 (page 2-3, FIG. 3)

  However, in the above-described configuration, the lower end side of the boot is only fitted with a recess with respect to the inner edge of the projecting opening of the console box, and the length of fitting of the boot into the console box is limited due to size restrictions. In the case where it is not possible to sufficiently remove the boot, there is a problem that the boot is not sufficiently fixed, and the fitting between the recessed portion and the projecting opening of the console box is likely to be released due to the operation of the operation lever or the like. And since the boots are easily removed in this way, dust and the like can easily enter the console box and the remote control valve.

  The present invention has been made in view of these points, and an object of the present invention is to provide an operating body device cover that is difficult to come off even when an operation shaft portion is operated, and an operation valve device including the same.

  The invention described in claim 1 is an operation provided with an operating body, an operating shaft portion protruding from the operating body, and a storage portion that houses the operating body and has a protruding opening from which the operating shaft portion protrudes to the outside. A cover for an operating body device used for a body device, having a cover opening at both ends, fitted from the operating shaft portion to the storage portion, and along the edge of the cover opening on the storage portion side of the cover body A recessed portion that fits with the inner edge of the protruding opening of the storage portion, and protrudes toward the outer surface of the operating body located inside the storage portion on the back side of the recessed portion. And a plurality of projecting portions that can be engaged with each other.

  According to a second aspect of the present invention, in the operating body device cover according to the first aspect, the protrusions are provided in pairs at positions facing each other.

  According to a third aspect of the present invention, in the operating body device cover according to the second aspect, a plurality of pairs of projecting portions are provided, and one pair of projecting portions intersects another pair of projecting portions. It is arranged in the direction.

  According to a fourth aspect of the present invention, there is provided an operating valve as an operating body, an operating shaft portion protruding from the operating valve, and a storage portion having a protruding opening portion that stores the operating valve inside and the operating shaft portion protrudes outside. And an operating body device cover according to any one of claims 1 to 3, which is attached from the operating shaft portion of the operating valve to the storage portion.

  According to the first aspect of the present invention, the recessed portion that fits the inner edge portion of the protruding opening portion of the storage portion is provided along the edge portion of the cover opening on the storage portion side of the cover body, and the back surface side of the recessed portion is provided. By projecting a plurality of protrusions that protrude toward the outer surface of the operation body located inside the storage portion and engage with the outer surface of the operation body, the concave portion side with respect to the protrusion opening of the storage portion It is possible to restrict the inwardly coming off by the projecting part, and it is difficult to come off even when the operating shaft part is operated.

  According to the second aspect of the present invention, by providing the protrusions in pairs at positions facing each other, the protrusions can prevent the recess side from coming inward with respect to the protrusion opening of the storage part. It can be more difficult to come off by restricting the positions facing each other.

  According to the third aspect of the present invention, the protrusions forming one pair are arranged in a direction intersecting with the protrusions forming another pair, so that each of the pair of protrusions causes the recess side to be It can control more reliably that it is going to come out inward with respect to a protrusion opening part.

  According to the fourth aspect of the present invention, the operation valve or the like can be reliably protected from dust by providing the operating body device cover according to any one of the first to third aspects, which is not easily detached even when the operation shaft portion is operated.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS.

  As shown in FIGS. 5 and 6, the work machine 11 includes, as a machine body 12, a lower traveling body 13 that can travel by a crawler belt, and a small-swivel upper swing that is provided so as to be able to swivel with respect to the lower traveling body 13 The upper turning body 14 includes an engine (not shown), a power device having a fluid pressure (hydraulic) pump driven by the engine, a cab 18 that is an operator's cab, and a small turning type. A hydraulic excavator on which the working device 19 is mounted.

  In this working device 19, a boom 21 is pivotally supported on the upper swing body 14 so as to be rotatable in the vertical direction. An offset mechanism 22 is provided on the upper portion of the boom 21, and the offset mechanism 22 can be translated in the left-right direction. The arm 23 is pivotally supported so as to be pivotable in the front-rear direction, the bucket 24 is pivotally supported at the tip of the arm 23, and the boom 21 is pivoted up and down by a boom cylinder 25 as a fluid pressure actuator. The arm 23 is translated in the left-right direction by an offset cylinder 26 as a fluid pressure actuator provided in the offset mechanism 22 of the boom 21 and rotated in the front-rear direction by an arm cylinder 27 as a fluid pressure actuator. The bucket 24 is rotated by a bucket cylinder 29 as a fluid pressure actuator via a link mechanism 28.

  As shown in FIGS. 3 and 4, in the cab 18, an operator seating seat 32 is provided on a platform 31 that constitutes a part of the airframe 12. A console box 33 made of synthetic resin or the like is disposed, and a remote control valve 34 as an operation body is accommodated at the front end of each console box 33, and an operation shaft portion is provided above each remote control valve 34. A working operation lever 35 is projected and used between the working operation lever 35 and the console box 33 in the operating body device A including the console box 33, the remote control valve 34, and the working operation lever 35. A boot 36 is attached as a cover for the operating body device, and a pair of left and right traveling pedals 37 and a lever 38 are provided in front of the seat 32. Are arranged, the attachment operation pedal 39 further to the right of the right traveling pedal 37 is disposed. The console box 33, the remote control valve 34, the work operation lever 35, the boot 36, and the like constitute a remote control valve device 40 as an operation valve device.

  As shown in FIGS. 1 and 2, the remote control valve 34 is pivoted in the left-right direction around the pivot shaft 42 in the front-rear direction of FIG. A pair of left and right push rods 44 that are pushed down by the operation lever 35 via the disc 43 that is a rod pressing member are slidably fitted in a liquid-tight manner, and rods (not shown) are respectively provided below these push rods 44. A pair of left and right spools (not shown) provided through the valve body 41 are slidably fitted to the lower portion of the valve body 41.

  Similarly, a pair of front and rear push rods (not shown) that are pushed down via a disk 43 by a working operation lever 35 that is turned in the front-rear direction around a pivot shaft (not shown) in the left-right direction in FIG. ) Is slidably fitted in a fluid-tight manner on the upper part of the valve body 41, and a pair of front and rear spools are provided on the lower side of these push rods via the rods. It is slidably fitted.

  Each push rod 44 is urged upward by a large-diameter spring (not shown) provided in the valve body 41. Each spool is biased downward by a spring (not shown) provided on the inner diameter side of the spring biasing the push rod 44, but can be moved upward by a return pressure.

  The pair of left and right spools output pilot pressure to one end surface or the other end surface of one stem of the main control valve (not shown), respectively, and the pair of front and rear spools is one end surface of the other stem of the main control valve. Alternatively, the pilot pressure is output to the other end surface.

  In the valve body 41, a primary side passage on the pilot primary pressure supply side communicated with the pilot pump, a return chamber communicated with the hydraulic oil tank, and a primary side passage or a return chamber depending on the position of the spool. Possible secondary passages on the pilot secondary pressure supply side are provided. When the spool moves downward, the primary passage and the secondary passage communicate with each other, and when the spool moves upward, the secondary passage and the return chamber communicate with each other.

  A plate 46 is liquid-tightly attached to the lower surface of the valve body 41. The plate 46 has a port 47 communicated with each secondary passage, a port 48 communicated with the primary passage, and a return passage. A communication port 49 is provided.

  Each secondary passage port 47 has a stem of a main control valve that controls the direction and throttle of hydraulic fluid supplied from the variable displacement pump, which is a pump, to the actuators such as the cylinders 25, 26, 27, and 29. The pilot line communicates with one end and the other end.

  A bellows 50 is attached to the upper portion of the valve body 41 so as to cover the push rod 44 and the disk 43.

  The operation lever 35 for work is provided at the head of a screw 51 screwed to the upper center of the remote control valve 34 so as to be rotatable in any direction of 360 ° by a universal joint 52 such as a universal joint or a ball joint. ing.

  When the universal joint 52 is a universal joint, the universal joint 52 is rotated in the left-right direction as one direction around the rotation support shaft 42 in the front-rear direction of FIG. The joint member 54 is rotated in the front-rear direction as the other direction intersecting with one direction.

  The disk 43 is screwed into the threaded portion 55 of the joint member 54, and the lower portion of the adjustment nut 56 is screwed. The lever nut 58 is attached to the lock nut 57 provided above and above the adjustment nut 56. The lower part is screwed and fixed by a lock nut 57. A handle 59 is integrally provided on the upper portion of the lever shaft 58.

  The boot 36 is a boot body 63 which is a bellows-like cover body formed in a rectangular tube shape having boot openings 61 and 62 as cover openings at the upper and lower ends, for example, by a material mixed with rubber and synthetic resin. A recess 64 is formed along the edge of the boot opening 62 on the lower side which is the console box 33 side of the boot body 63, and a plurality of on the inner edge side which is the back side of the recess 64, For example, four protrusions 65 are provided in a protruding manner.

  The recessed portion 64 is formed between the fitting piece portion 66 protruding toward the outside of the boot main body 63 and the boot main body 63, and the box opening 67 as a protruding opening formed in the upper portion of the console box 33. It is a portion that fits into the inner edge portion, and is continuous over the entire circumference over the respective front, rear, left, and right sides of the outer edge portion of the boot opening 62 of the boot body 63.

  The fitting piece 66 is inserted from the box opening 67 into the console box 33 and is positioned along the inner surface of the console box 33. Further, the length of the fitting piece 66 is set to be longer than the distance from the boot opening 62 on the lower side of the boot 36 to the outer surface of the valve body 41.

  The protrusions 65 are formed in pairs at opposite positions, for example, the front-rear direction and the left-right direction, and protrude toward the outer surface of the valve body 41. Accordingly, the pair of protrusions 65 and 65 facing each other are arranged in a direction substantially orthogonal to the other pair of protrusions 65 and 65. The leading ends of these protruding portions 65 are engaged (contacted) with flange portions 69 that protrude from the outer edge portions of the upper sides of the valve body 41 in a substantially arc shape in plan view. Each protrusion 65 is formed so that the width dimension decreases from the base end side toward the tip end side.

  Next, an assembling procedure of the remote control valve device 40 according to the one embodiment will be described.

  First, a unit in which the push rod 44, the disc 43, the bellows 50, the lever shaft 58, and the like are attached to the valve body 41 is assembled inside the box opening 67 of the console box 33. The shaft 58 side is projected upward.

  In this state, when the boot 36 is covered from the upper side and the concave portion 64 on the lower end side of the boot 36 is fitted to the inner edge portion of the box opening 67, each protrusion 65 is placed on the side surface of the flange portion 69 of the valve body 41. Protruding.

  Thereafter, the handle 59 is fixed to the lever shaft 58 protruding from the boot opening 61 on the upper side of the boot 36, and the remote control valve device 40 is completed.

  Next, the operation of the remote control valve device 40 of the above embodiment will be described.

  When the operator rotates the operation lever 35 to the right (left side) in FIG. 1, the right (left) spool is pushed down, and the pilot primary pressure oil supplied from the pilot pump to the primary passage is The pressure is controlled in accordance with the amount of displacement of the spool, and the pilot secondary pressure oil flows into each secondary passage and acts on one end side of the stem of the main control valve from the port 47 through the pilot line.

  The stem strokes according to the pilot secondary pressure, and is supplied from the variable displacement pump to one end side of the actuator such as each cylinder 25, 26, 27, 29, etc., and from the other end side of this actuator to the hydraulic oil tank The actuator is operated by controlling the direction and flow rate of the returned hydraulic oil.

  On the other hand, the pilot return oil pushed out from the other end side of the stem is returned to the return chamber through the secondary line via the pilot line, and further returned to the hydraulic oil tank.

  Next, effects of the remote control valve device 40 of the above-described embodiment will be listed.

  Along with the edge of the boot opening 62 on the console box 33 side of the boot body 63, a recess 64 that fits with the inner edge of the box opening 67 is provided, and on the back side of the recess 64, the outer surface of the remote control valve 34 is provided. By projecting a plurality of projecting portions 65 toward the outer surface of the remote control valve 34 so that the recessed portion 64 side is deformed so as to be disengaged inward with respect to the box opening 67, each projecting portion 65 Since the distal end side of the portion 65 comes into contact with the remote control valve 34 and this deformation is restricted, it is difficult to come off even when the operation lever 35 is operated.

  In addition, when the boots 36 are removed, these protruding portions 65 are stretched between the outer portions of the remote control valve 34 to prevent the removal, but the boots 36 are not obstructed and the workability of installing the boots 36 is reduced. There is nothing to do.

  Further, by providing the projections 65 and 65 in pairs at positions facing each other, the projections 65 and 65 oppose each other so that the concave portion 64 side tends to come out with respect to the box opening 67. By restricting the position of the boot 36, the boot 36 can be more easily removed from the console box 33 or the like. In particular, by bringing the front ends of the protrusions 65 and 65 into contact with the remote control valve 34, the remote control valve 34 can be clamped from a position facing each other, and the boot 36 can be more reliably prevented from coming off.

  Moreover, by arranging one pair of projecting portions 65, 65 facing each other and the other pair of projecting portions 65, 65 facing each other at positions that intersect (orthogonal) each other in plan view, It can control more reliably that the recessed part 64 side is going to remove | inward with respect to the box opening part 67, and can prevent the boot 36 from falling out more reliably. In particular, since the work operation lever 35 is rotatable in any direction of 360 °, the work operation lever 35 can be moved in any direction by projecting the projecting portion 65 from the four directions of the front-rear direction and the left-right direction. Even when operated, any of the protrusions 65 restricts the inward deformation of the recess 64, so that the boot 36 can be reliably prevented from coming off.

  In addition, by providing the boot 36 that is hard to come off even when the operation lever 35 is operated, etc., the inside of the remote control valve 34 and the console box 33 can be reliably protected from dust, water and other problems caused by intrusion of dust and water can be prevented. , Can improve the reliability.

  In the above embodiment, as long as a plurality of projecting portions 65 project inside the boot opening 62 on the lower side of the boot body 63, their positions can be arbitrarily set. That is, depending on the shape of the boot main body 63, a configuration in which the protrusions 65 are provided at two locations, a configuration in which three or more locations are provided, and the like can be employed.

  Further, if the distal end side of the projecting portion 65 projects toward the outer surface of the remote control valve 34 and can be engaged with the outer surface, it is not always engaged (contacted) with the remote control valve 34. Can achieve the same effect.

  Further, the remote control valve device 40 can be used for any fluid pressure circuit other than the work machine 11.

  The boot 36 is an arbitrary operation having an operation body such as a shift lever of an automobile, an operation shaft portion protruding from the operation body, and a storage portion including the operation body and a projecting opening from which the operation shaft portion protrudes. It can be used for body devices.

It is a longitudinal cross-sectional view which shows one Embodiment of the operating valve apparatus provided with the cover for operating body apparatuses which concerns on this invention. It is a bottom view which shows an operation valve apparatus same as the above. It is a perspective view which shows the operation valve apparatus vicinity same as the above from the front. It is a perspective view which shows a part inside cab provided with the operation valve apparatus same as the above. It is a side view which shows the working machine provided with the operation valve apparatus same as the above. It is a top view which shows a working machine same as the above.

Explanation of symbols

A Operating body device
33 Console box as storage
34 Remote control valve as an operating valve
35 Operation lever for operation
36 Boots as covers for operating body devices
40 Remote control valve device as operation valve device
61, 62 Boot opening as cover opening
63 Boot body as cover body
64 recess
65 Protrusion
67 Box opening as protruding opening

Claims (4)

For an operating body device used for an operating body device having an operating body, an operating shaft portion protruding from the operating body, and a storage portion that houses the operating body and has a protruding opening that protrudes outward from the operating shaft portion A cover,
Cover bodies provided with cover openings at both ends and fitted from the operation shaft portion to the storage portion;
A recess that is provided along the edge of the cover opening on the storage portion side of the cover body, and that fits with the inner edge of the protruding opening of the storage portion;
An operating body comprising a plurality of projecting portions protruding toward an outer surface of the operating body located inside the storage portion and engageable with an outer surface of the operating body on the back side of the recess. Equipment cover. The operating body device cover according to claim 1, wherein the protruding portions are provided in pairs at positions facing each other. A plurality of pairs of protrusions are provided,
The operating body device cover according to claim 2, wherein the protrusions forming one pair are arranged in a direction intersecting with the protrusions forming another pair. An operating valve as an operating body;
An operation shaft protruding from the operation valve;
A storage portion that houses the operation valve inside and has a projecting opening from which the operation shaft portion projects to the outside;
An operating valve device comprising: the operating body device cover according to any one of claims 1 to 3 attached from an operating shaft portion of the operating valve to a storage portion.

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