JP5401484B2 - Undercover device - Google Patents

Description

  The present invention relates to an under cover device for maintenance provided on a lower surface of an upper swing body in a working machine such as a hydraulic excavator.

  In a hydraulic excavator, a power unit including an engine, a radiator, and the like is mounted on a turning frame constituting an upper turning body. The lower surface of the revolving frame is covered with a bottom plate, and a maintenance opening is provided in a part of the bottom plate, and a removable under cover is attached to the opening. In many cases, the conventional undercover is detachably attached to the lower surface of the swivel frame with bolts, as shown in Patent Documents 1 and 2, for example.

  Moreover, as a conventional undercover apparatus, there exists what is shown in the side view of FIG. 10 (A), and the bottom view of FIG. 10 (B). This undercover device has a structure in which a maintenance opening 70 a provided in the bottom plate 70 is covered with a cover material 71. The cover member 71 is fixed to the bottom plate 70 by inserting butterfly bolts 72 into two guide grooves 71 a provided in the cover member 71 and screwing and fastening to nuts 73 provided on the bottom plate 70. The front end of 71 is locked with an L-shaped locking plate 74 provided on the bottom plate 70. The opening 70 a is opened by loosening the butterfly bolt 72 and pulling the cover member 71 by placing fingers 75 of both hands on the handle 71 b provided on the cover member 71.

JP 2002-302065 A JP 2010-216190 A

  However, as described in Patent Documents 1 and 2, in the structure in which the cover material is detachably attached to the lower surface of the bottom plate with the bolt, it is necessary to attach and detach the bolt every time the cover material is attached and detached. In the narrow work space at the bottom, there is a problem that work is not easy and it takes time to attach and detach the cover material.

  On the other hand, as shown in FIG. 10, in the conventional structure in which the cover member 71 is slid to open and close the opening 70a, it is necessary to provide the guide member 71a in the cover member 71, so the area of the opening 70a of the bottom plate 70 Cannot be taken widely. Further, if the cover material 71 is pulled with one hand, the cover material 71 is biased and cannot slide, so it is necessary to use both hands to open and close the cover material 71. There is also a problem that the posture of the worker is not stable and the opening / closing operation is not easy.

  In view of the above problems, an object of the present invention is to provide an undercover device in which an opening / closing operation of a cover material is facilitated and an opening provided in a bottom plate can be made wider than a slide type.

The under cover device according to claim 1, wherein the under cover device is provided for maintenance on the lower surface of the upper swing body of the working machine.
A bottom plate fixed to the lower surface of the upper swing body;
An approximately semicircular opening provided in the bottom plate;
A cover material having a substantially semicircular shape having a slightly larger area than the opening;
The pivot joint provided at the center of the arc formed by the arcuate edge of the cover material is aligned with the cover material pivot provided at the center of the arc formed by the arcuate opening edge of the opening in the bottom plate. An attachment for pivotally attaching a cover material to the lower surface of the bottom plate;
A peripheral support member provided in the vicinity of the arc-shaped opening edge of the opening on the lower surface of the bottom plate, and slidably loosely fitting and supporting the arc-shaped edge of the cover material;
A rotation operation handle attached to the lower surface of the cover material,
The opening is closed and opened by the cover material by rotating the cover material around the fixture using the handle.

The undercover device according to claim 2 is an undercover device provided for maintenance on the lower surface of the upper swing body of the work machine.
A bottom plate fixed to the lower surface of the upper swing body;
An arcuate opening edge provided on the bottom plate, a substantially semicircular arc-shaped opening edge, a cover material pivot part provided at the center of an arc formed by the arc-shaped opening edge, and ends of the arc-shaped opening edge respectively from both sides of the cover material pivot part An opening having a linear opening edge provided over the part;
A substantially semicircular arc edge, a pivot portion provided at the center of the arc formed by the arc edge, and a straight edge provided from both sides of the pivot portion to the end of the arc edge, A cover material having a slightly larger area than the opening;
A fitting that pivotally attaches the cover material to the bottom surface of the bottom plate according to the pivot material provided on the bottom plate in accordance with the pivot support provided on the bottom plate,
A peripheral support member provided in the vicinity of the arc-shaped opening edge of the opening on the lower surface of the bottom plate, and slidably loosely fitting and supporting the arc-shaped edge of the cover material;
Provided in the vicinity of one linear opening edge of the opening on the lower surface of the bottom plate, and when the opening is closed by the cover material, the one linear edge of the cover material is brought into contact with the opening, A fixed stopper for positioning by contacting the other linear edge of the cover material when the opening is fully opened by rotation of the cover material;
In the vicinity of the other linear opening edge of the opening in the bottom plate, provided so as to be able to project and retract below the bottom surface of the bottom plate and biased downward by a biasing means. A movable stopper that prevents the rotation by bringing the other linear edge of the cover material into contact when the opening is closed;
And a handle for rotating operation attached to the cover material.

The undercover device according to claim 3 is the undercover device according to claim 2,
Four of the peripheral supporting members are arranged on an arc centered on a pivot portion provided on the bottom plate with an angular interval of 90 degrees from each other.

The undercover device according to claim 4 is the undercover device according to claim 2 or 3,
In the cover material, the handle is provided in the vicinity of the linear edge on both sides of the pivot portion.

The undercover device according to claim 5 is the undercover device according to any one of claims 1 to 4,
Ventilation holes are provided in the bottom plate and the cover material.

  According to the first aspect of the present invention, since the opening can be opened and closed by putting one hand on the handle and rotating the cover material, the cover material is attached with a plurality of bolts as in the prior art, or both hands are handled by the handle. The opening / closing operation of the opening is facilitated as compared with the case of opening / closing by linearly moving the opening. In addition, since the cover material has a slightly larger area than the opening provided in the bottom plate, a wider opening can be secured as compared with a cover material that is opened and closed by linear movement.

  In addition, since the peripheral support material that slidably fits and supports the arc-shaped edge of the cover material is provided, the cover material is prevented from vibrating and the peripheral portion of the cover material is supported. It is possible to prevent the cover material and the fixture from being damaged due to excessive force due to vibration acting on the tool.

  According to the second aspect of the present invention, the two linear edges on both sides of the pivotally attached portion of the cover member abut against the fixed stopper and the movable stopper when the opening is closed and when the opening is closed. The rotation of the cover material is prevented, and there is no possibility that the cover material rotates and the opening is opened when the opening is closed. Moreover, the movable stopper can be easily released from the rotation prevention state by one touch by being pushed up from below.

  According to the invention of claim 3, since the four peripheral support members are dispersedly arranged on the circle at equal intervals, the cover member is always kept not only when the opening is closed by the cover member but also during the opening and closing. It is supported by the peripheral support material, and the peripheral support material can be smoothly rotated.

  According to the invention of claim 4, since the handle is provided in the vicinity of the linear edge of the cover material, the cover material can be easily rotated with one hand.

  According to the invention of claim 5, the peripheral portion of the cover material is supported and guided by the guide material provided on the bottom surface of the bottom plate, and the guide is provided with the guide groove as in the conventional case. Compared to the structure in which the opening is opened and closed by linear movement of the member, the cover material overlaps with the periphery of the opening, so that the portion where the opening is closed is covered with the cover material. The pores are covered with the cover material and do not function, or because the cover material is covered with the cover material, the width of the portion where the vent holes are not originally provided is narrower than before, and good air permeability is ensured.

It is a perspective view which shows the bottom face part of the working machine to which the undercover apparatus of this invention is applied. It is a bottom view which shows one Embodiment of the undercover apparatus by this invention in an opening part obstruction | occlusion state. It is a bottom view which shows one Embodiment of the undercover apparatus by this invention in an opening part full open state. It is a bottom view which shows the bottom plate of this embodiment. It is a longitudinal cross-sectional view which shows the periphery supporting material of this embodiment. It is a bottom view which shows the cover material of this embodiment. It is a longitudinal cross-sectional view which shows the pivoting part of the cover material of this embodiment. It is a longitudinal cross-sectional view which shows the attachment structure of the stopper of this embodiment. It is a longitudinal cross-sectional view which shows the retracted state of the movable stopper of this embodiment. (A) is a side view showing a conventional undercover device, and (B) is a bottom view thereof.

  FIG. 1 is a perspective view showing an example of a bottom surface portion of an upper swing body of a working machine to which an undercover device of the present invention is applied. The upper swing body 1 is an upper swing body of a hydraulic excavator. Reference numeral 2 denotes a revolving frame that constitutes the upper revolving structure 1, and the revolving frame 2 is mounted with a hydraulic power unit 3 including an engine, a hydraulic pump, a radiator, and tanks, an operator cab 4, a counterweight 5, and the like. Reference numeral 6 denotes a front mounting portion. The front mounting portion 6 is used to mount a boom and a boom cylinder that constitute a base portion of the work multi-joint front. Reference numeral 7 denotes a turning device mounting portion installed on a turning device (not shown) attached to the lower traveling body (not shown).

  Reference numerals 10 and 11 denote undercover devices according to the present invention, which are respectively attached under the oil pan of the engine, which performs maintenance such as cleaning relatively frequently, and at portions corresponding to the front and rear of the engine radiator.

  2 and 3 are bottom views showing the undercover device 10 shown in FIG. 1 in a closed state and a fully opened state of the opening by the cover. 2 and 3, reference numeral 13 denotes a bottom plate attached to the bottom surface of the revolving frame 2 constituting the upper revolving structure 1, 14 denotes a substantially semicircular maintenance opening provided on the bottom plate 13, and 15 denotes an opening. A cover member 13 a for opening and closing the portion 14 is a ventilation hole provided in the bottom plate 13.

  As shown in FIG. 4, the opening 14 provided in the bottom plate 13 includes a substantially semicircular arc-shaped opening edge 14a, a cover material pivot 14b provided at the center of the arc formed by the arc-shaped opening edge 14a, and a cover material. Linear opening edges 14c and 14d provided from both sides of the pivot portion 14b to the end of the arcuate opening edge 14a. 14e is a vent hole. The bottom plate 14 is attached with its peripheral portion fixed to the bottom surface of the revolving frame 2 with bolts 16.

  Reference numeral 17 denotes a peripheral support material of the cover material 15. The peripheral support member 17 is attached to the vicinity of the arcuate opening edge 14a of the opening 14 on the lower surface of the bottom plate 13 by welding or a fixing tool such as a screw or a rivet. In this embodiment, the peripheral support member 17 is provided with two peripheral support members 17 not only in the vicinity of the arcuate opening edge 14a but also on the opposite side of the opening portion 14 with the cover member pivot 14b as the center. Four peripheral supporting members 17 are provided. These four peripheral support members 17 are arranged on the circular arc centered on the pivotal support portion 14b with an angular interval of 90 degrees. As shown in FIG. 5, the peripheral support member 17 has a U shape so that the arcuate edge 15 a of the cover member 15 is slidably fitted.

  As shown in FIG. 6, the cover member 15 for opening and closing the opening 14 includes a substantially semicircular arc edge 15a, a pivot portion 15b provided at the center of the arc formed by the arc edge 15a, and the pivot joint. Straight edges 15c and 15d provided from both sides of the portion 15b to the end of the arcuate edge 15a. The cover material 15 has a slightly larger area than the opening 14. Reference numeral 15e denotes a vent hole. Reference numerals 15f and 15g denote handles for rotating the cover material, which are attached so as to protrude downward in the vicinity of the linear edges 15c and 15d of the cover material 15. Reference numerals 15 i and 15 j denote tapered portions for allowing the outer ends of the straight edges 15 c and 15 d to be smoothly inserted into the peripheral support member 17 when the cover member 15 is rotated. These taper portions 15i and 15j are formed by forming the lower surface of the cover material 15 into an inclined surface so that the thickness on the straight edges 15c and 15d side becomes narrow.

  FIG. 7 is a cross-sectional view showing a structure for attaching the pivot portion 15b of the cover member 15 to the cover member pivot portion 14b. Reference numeral 20 denotes a bolt provided as an attachment for attaching the cover member 15 to the bottom plate 13. 4 and 6, respectively, 13b and 15h are bolt insertion holes provided in the pivot portion 14b and the pivot attachment portion 15b, 21 and 22 are washers through which the bolt 20 is inserted, and 23 is a screw on the bolt 20, respectively. A mating double nut 24 is a spring washer that is inserted between the washer 22 and the double nut 23 while inserting the bolt 20. Due to the elasticity of the spring washer 24, the pivot portion 15b of the cover member 15 is attached in a state where it is pressed against the bottom plate 13 without rattling.

  2 to 4, reference numeral 25 denotes a fixed stopper provided in the vicinity of one linear opening edge 14 c on the lower surface of the bottom plate 13. The fixed stopper 25 is for abutting the linear edge 15 c in a state where the opening 14 is closed by the cover material 15. As shown in FIG. 8, the fixed stopper 25 is fixedly attached to the bottom plate 13 by fitting or welding as shown.

  2 to 4, reference numeral 26 denotes a movable stopper provided in the vicinity of the other linear opening edge 14 d in the bottom plate 13. The movable stopper 26 prevents the rotation by contacting the linear edge 15d of the cover material 15 in a state where the opening 14 is closed by the cover material 15. As shown in FIG. 8, the movable stopper 26 is attached by a mounting bracket 27 welded to the upper surface of the bottom plate 13. That is, the movable stopper 26 is constituted by a bolt, and the bolt head 26a is fitted in the hole 13c provided in the bottom plate 13 and the head accommodating portion 27a provided in the mounting bracket 27 so as to be movable up and down. The screw part 26b is inserted into a bolt insertion hole 27b provided in the mounting bracket 27 so as to be vertically movable. A double nut 28 is screwed into the screw portion 26b to prevent it from coming off.

  As shown in FIG. 9, the movable stopper 26 can be retracted from the lower surface of the bottom plate 13 so as not to hinder the rotation of the cover member 15 by being pushed up with a finger or the like from below. Further, the bolt 26 uses its own weight as a downward biasing means together with the double nut 28. When the hand 26 or the cover material 15 is no longer supported, as shown in FIG. Also descends to a position protruding downward. A spring can also be used as a downward biasing means for the bolt 26.

  In this configuration, normally, the opening 14 is closed by the cover member 15 as shown in FIG. In this state, the pivot portion 15 b of the cover member 15 is fixed to the pivot portion 14 b of the bottom plate 13 by the bolt 20 and the double nut 23. Further, the linear edges 15c and 15d of the cover 15 abut against the fixed stopper 25 and the movable stopper 26, respectively, so that the cover material 15 is prevented from rotating. Further, in the closed state of the opening 14 by the cover material 15, the arc-shaped edge 15 a of the cover material 15 is supported by the two peripheral support members 17 and 17 provided in the vicinity of the arc-shaped opening edge 14 a.

  When the cover member 15 is rotated to open the opening 14, the bottom of the bottom plate 13 is held by the movable stopper 26 with a finger as shown in FIG. 9 in order to release the stopped state of the cover member 15 by the movable stopper (bolt) 26. Push upward from the lower surface of. In this state, when the cover material 15 is rotated by placing one hand on the handle 15g, the movable stopper 26 is placed on the upper surface of the cover material 15, and the cover material 15 is rotated while the movable stopper 26 slides on the upper surface of the cover material 15. Can be moved.

  Then, as shown in FIG. 3, when the linear edge 15 d of the cover member 15 contacts the fixed stopper 25, further rotation is prevented and the opening 14 is fully opened. In this fully open state, the arcuate edge 15a of the cover member 15 has two peripheral support members 17, 17 provided on the opposite side of the two peripheral support members 17, 17 provided in the vicinity of the arcuate opening edge 14a. Supported by In this open state, the movable stopper 26 remains on the upper surface of the cover material 15. In the fully open state of the opening 14, the operator can put out his / her hand from the opening 14 to take out, attach and clean the parts.

  When the cover member 15 is rotated from the fully opened state to close the opening 14, the handle 15f is put on one hand and turned in the opposite direction to the closed state shown in FIG. In this closed state, the movable stopper 26 is lowered by its own weight to a position where the cover member 15 is prevented from rotating as shown in FIG.

  As described above, in this embodiment, the opening 14 can be opened and closed by putting the one hand on the handles 15f and 15g and turning the cover member 15, so that the cover member is attached with a plurality of bolts as in the prior art. In addition, the opening / closing operation of the opening can be facilitated as compared with a linear movement that opens and closes both hands on the handle. Further, since the cover material 15 has a slightly larger area than the opening 14 provided in the bottom plate 13, it is possible to ensure a wide opening compared to the cover material that moves linearly.

  In addition, since the peripheral support member 17 is provided that slidably fits and supports the arcuate edge 15a of the cover member 15, vibration of the cover member 15 is prevented and the peripheral portion of the cover member 15 is supported. Further, it is possible to prevent the cover material 15 and the mounting tool 20 from being damaged due to excessive force due to vibration acting on the cover material 15 and the mounting tool 20.

  In addition, since the two linear edges 15c and 15d on both sides of the pivoting portion 15b of the cover material 15 abut against the fixed stopper 25 and the movable stopper 26 when the opening portion 14 is closed, the cover material 15 is prevented from rotating. There is no possibility that the opening 14 is rotated and opened. Further, the movable stopper 26 can be easily released from the rotation prevention state by being pushed up from below, and the rotation prevention release operation can be easily performed with one touch.

  In this embodiment, since the four peripheral support members 17 are distributed on the arc at equal intervals, not only when the opening 14 is closed and opened by the cover member 15 but also during opening and closing. Since the cover member 15 is always supported by the peripheral support member 17, the cover member 15 can be smoothly rotated.

  In addition, since the handles 15f and 15g are provided in the vicinity of the linear edges 15c and 15d of the cover material 15, respectively, the cover material 15 is pulled by pulling the handles 15f and 15g when the cover material 15 is opened and closed. It can be easily rotated.

  In this embodiment, the periphery of the cover material 15 is supported and guided by the guide material 17 provided on the bottom plate 13, and the cover material has a guide groove as in the prior art. Compared to the structure in which the opening is opened and closed by linear movement of the guide member, the cover material 15 is narrower in the portion overlapping the periphery of the opening 14, so that the opening 14 is closed with the cover material 15, The vent hole 13a provided in the bottom plate 13 is covered with the cover material 15 and does not function, or the area where the vent hole 13a is not originally provided because it is covered with the cover material 15 is narrower than before, and good air permeability is achieved. Is secured.

  Further, in this embodiment, the movable stopper 26 is provided in the vicinity of the linear opening edge 14d, and when the opening 14 is closed, the movable stopper 26 is provided in the vicinity of the linear edge 15d of the cover material aligned with the linear opening edge 14d. Since the handle 15g is provided, it is possible to easily release the rotation preventing state by pushing up the movable stopper 26 and to rotate the cover member 15 by operating the handle 15g simultaneously with one hand.

  The present invention can be applied to an under cover device on the lower surface of an upper swing body of various working machines other than a hydraulic excavator. Moreover, when implementing this invention, a various change and addition are possible not only in the said embodiment but in the range which does not deviate from the summary of this invention.

1: upper swing body, 2: swing frame, 3: hydraulic power unit, 4: cab, 5: counterweight, 6: front mounting portion, 7: swivel mounting portion, 10, 11: undercover device, 13: bottom Face plate, 14: Opening portion, 14a: Arc-shaped opening edge, 14b: Cover material pivoting portion, 14c, 14d: Straight opening edge, 15: Cover material, 15a: Arc-shaped edge, 15b: Pivoting portion, 15c, 15d: Straight line 15f, 15g: handle, 17: peripheral support material, 20: fixture (bolt), 21, 22: washer, 23: double nut, 24: spring washer, 25: fixed stopper, 26: movable stopper, 27 : Mounting bracket, 27a: Head receiving portion, 27b: Bolt insertion hole, 28: Double nut

Claims (5)

In the under cover device provided for maintenance on the lower surface of the upper rotating body of the work machine,
A bottom plate fixed to the lower surface of the upper swing body;
An approximately semicircular opening provided in the bottom plate;
A cover material having a substantially semicircular shape having a slightly larger area than the opening;
The pivot joint provided at the center of the arc formed by the arcuate edge of the cover material is aligned with the cover material pivot provided at the center of the arc formed by the arcuate opening edge of the opening in the bottom plate. An attachment for pivotally attaching a cover material to the lower surface of the bottom plate;
A peripheral support member provided in the vicinity of the arc-shaped opening edge of the opening on the lower surface of the bottom plate, and slidably loosely fitting and supporting the arc-shaped edge of the cover material;
A rotation operation handle attached to the lower surface of the cover material,
An under cover device configured to close and open the opening by the cover material by rotating the cover material around the fixture using the handle. In the under cover device provided for maintenance on the lower surface of the upper rotating body of the work machine,
A bottom plate fixed to the lower surface of the upper swing body;
An arcuate opening edge provided on the bottom plate, a substantially semicircular arc-shaped opening edge, a cover material pivot part provided at the center of an arc formed by the arc-shaped opening edge, and ends of the arc-shaped opening edge respectively from both sides of the cover material pivot part An opening having a linear opening edge provided over the part;
A substantially semicircular arc edge, a pivot portion provided at the center of the arc formed by the arc edge, and a straight edge provided from both sides of the pivot portion to the end of the arc edge, A cover material having a slightly larger area than the opening;
A fitting that pivotally attaches the cover material to the bottom surface of the bottom plate according to the pivot material provided on the bottom plate in accordance with the pivot support provided on the bottom plate,
A peripheral support member provided in the vicinity of the arc-shaped opening edge of the opening on the lower surface of the bottom plate, and slidably loosely fitting and supporting the arc-shaped edge of the cover material;
Provided in the vicinity of one linear opening edge of the opening on the lower surface of the bottom plate, and when the opening is closed by the cover material, the one linear edge of the cover material is brought into contact with the opening, A fixed stopper for positioning by contacting the other linear edge of the cover material when the opening is fully opened by rotation of the cover material;
In the vicinity of the other linear opening edge of the opening in the bottom plate, provided so as to be able to project and retract below the bottom surface of the bottom plate and biased downward by a biasing means. A movable stopper that prevents the rotation by bringing the other linear edge of the cover material into contact when the opening is closed;
An undercover device comprising a handle for rotating operation attached to the cover material. The undercover device according to claim 2,
4. An undercover device, wherein four peripheral support members are arranged on an arc centered on the pivot portion provided on the bottom plate at an angular interval of 90 degrees. The undercover device according to claim 2 or 3,
The under cover device according to claim 1, wherein the handle is provided in the vicinity of the linear edge on both sides of the pivot portion in the cover material. In the undercover device according to any one of claims 1 to 4,
An under cover device, wherein a vent hole is provided in the bottom plate and the cover material.

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