JP6350560B2 - Construction machinery - Google Patents

Description

  The present invention relates to a construction machine provided with a cooler such as a radiator or an oil cooler.

  Conventionally, an engine, a cooler, a cooling fan provided between the engine and the cooler, a shroud extending from the cooler to the cooling fan side to adjust cooling air to the cooler by the cooling fan, and cooling A construction machine including a guard attached to a shroud so as to cover the fan from the engine side is known.

  Here, when replacing the fan belt provided between the engine and the cooler, there is a problem that the shroud and the guard become an obstacle.

  Therefore, a shroud having a fixed shroud fixed to the cooler and a detachable shroud that is detachably attached to the cooler by screwing a butterfly bolt into a screw hole provided in the cooler. A construction machine provided is also known (for example, Patent Document 1).

  In the construction machine described in Patent Document 1, the guard is fixed to the engine side portion of the detachable shroud.

  Therefore, by removing the butterfly bolt from the cooler, the guard can be removed from the cooler together with the removable shroud. In this state, the operator replaces the fan belt provided between the engine and the cooler.

Japanese Patent No. 4213479

  Here, in the space between the engine and the cooler, a plurality of components including a cooling fan (for example, a fan belt and piping) are densely arranged. Therefore, when removing the butterfly bolt from the cooler to remove the guard as in the construction machine described in Patent Document 1, if the butterfly bolt enters the space between the engine and the cooler, the butterfly bolt may be lost. There is.

  In addition, in the construction machine described in Patent Document 1, since it is necessary to remove a part of the shroud (detachable shroud) from the cooler when removing the guard, it is not a large-scale operation such as a fan belt replacement operation. Inefficient maintenance (for example, confirmation work of fan belt tension) is inefficient.

  An object of the present invention is to provide a construction machine that can efficiently perform daily maintenance while preventing loss of a butterfly bolt.

In order to solve the above-described problems, the present invention provides a construction machine for an engine, a cooler, a cooling fan provided between the engine and the cooler, and the cooler by the cooler fan. A shroud extending from the cooler to the cooling fan side to adjust the cooling air; and a guard attached to the shroud so as to cover the cooling fan from the engine side. A fixing member having an opening for opening a space between the cooler and fixed to the shroud; and between the closed position for closing the opening and the opening position for opening the opening. An opening / closing operation member attached to be rotatable, and the fixing member and the opening / closing operation member in a state where the opening / closing operation member is rotated to the closed position. By a one member and the female screw portion is screwed into the female screw portion of the screw member that is provided other than the screw member of said fixing member and said opening and closing member between the screw member A butterfly bolt that sandwiches the clamped member, a regulating mechanism that regulates the butterfly bolt from being removed from the female screw portion, and the butterfly bolt and the screw side member between the butterfly bolt and the screw side member in a state where the opening / closing operation member is in the closed position. There is provided a construction machine having a permissible mechanism that allows movement of at least one of the butterfly bolt and the opening / closing operation member so that the clamped member is disposed at a position outside the clamping range.

  According to the present invention, the clamped member is sandwiched between the butterfly bolt and the screw side member by tightening the butterfly bolt that can be operated without using a tool in a state where the opening and closing operation member is rotated to the closed position. The opening / closing member can be fixed in the closed position.

  On the other hand, by loosening the butterfly bolt, the pinching of the pinched member by the butterfly bolt and the screw side member can be released, and in this state, the pinched member is moved to a position outside the pinching range by using an allowance mechanism. By doing so, the opening / closing member can be rotated from the closed position to the open position.

  In such a state where the opening / closing member is rotated to the open position, the operator performs routine maintenance (for example, fan belt tension) of the configuration provided between the engine and the cooler through the opening of the fixing member. Status).

  Furthermore, in the present invention, when the pinching of the clamped member by the butterfly bolt is released as described above, the butterfly bolt can be prevented from coming off from the female screw portion by the restriction mechanism. And the cooler can be prevented from entering.

  As described above, according to the present invention, it is possible to efficiently perform daily maintenance by rotating the opening / closing operation member to the open position to open the opening of the fixing member, and the butterfly bolt is provided with the female screw portion. The loss of the butterfly bolt can be prevented by restricting it from coming off.

  Here, when the closing position is set below the rotation center of the opening / closing operation member, the operator performs the opening / closing operation while supporting the weight of the opening / closing operation member so that the opening / closing operation member is maintained at the closed position. Although the member may be moved so as to overlap within the clamping range, such work places a heavy burden on the operator when the opening / closing member is opened and closed.

  Therefore, in the construction machine, the closing position is set below a rotation center of the opening / closing operation member, and the permission mechanism includes a holding position where the opening / closing operation member overlaps the holding range, and the opening / closing operation member includes the opening / closing operation member. The opening / closing operation member is allowed to move along the rotation center between a non-clamping position outside the clamping range, and the fixing member is in the closed position between the clamping position and the non-clamping position. It is preferable to have a support portion that supports the opening / closing member from below the opening / closing member.

  According to this aspect, during the period in which the opening / closing operation member is moved using the permission mechanism, the weight of the opening / closing operation member can be deposited on the support portion of the fixing member. Can be reduced.

  Here, the support part may support any part of the opening / closing operation member as long as it is a part away from the rotation center of the opening / closing operation member, but the support part is supported from the rotation center of the opening / closing operation member. It is preferable to be provided at a position where the most distant tip can be supported.

  According to this aspect, it is possible to reduce a load generated in the support portion in order to support the weight of the opening / closing operation member as compared with the case where the support portion supports a portion closer to the rotation center than the distal end portion of the opening / closing operation member. Can do.

  Here, the opening of the fixing member may have a shape that is entirely covered by the opening / closing operation member in a state where the opening / closing operation member is in the non-clamping position, but the opening is in a state where the opening / closing operation member is in the clamping position. It suffices to have a shape covered with.

  Therefore, in the construction machine, the opening is opened from the opening / closing operation member in a state where the opening / closing operation member is in the non-clamping position, and the opening / closing operation member is in a state where the opening / closing operation member is in the clamping position. It is preferable to include an area that is closed by.

  According to this aspect, the opening area of the portion corresponding to the movement range of the opening / closing operation member is enlarged as compared with the case where an opening having a shape that is entirely covered with the opening / closing operation member in the non-clamping position is employed. Can do. Therefore, as described above, it is possible to secure a large area of the opening while forming the support portion for realizing the support of the opening / closing member over the sandwiching position and the non-pinch position. Therefore, maintenance can be performed more efficiently.

  Here, the construction machine has a configuration for attaching the opening / closing operation member so as to be rotatable with respect to the fixing member, and a configuration for attaching the opening / closing operation member to the fixing member so as to be movable between the holding position and the non-holding position. However, in this case, the cost of the construction machine increases.

  Therefore, in the construction machine, the opening / closing operation member can rotate between the closed position and the opening position, and the opening / closing operation member along the rotation center of the opening / closing operation member is relative to the fixing member. It is preferable that the apparatus further includes at least one hinge connecting the opening / closing member to the fixed member so as to allow movement, and the allowing mechanism includes the hinge.

  According to this aspect, since the hinge having both the function for rotating the opening / closing member and the function for moving it is adopted, the cost is reduced as compared with the case where both functions are realized by separate configurations. can do.

  Here, as described above, when the function for rotating the opening / closing operation member and the function for moving the opening / closing operation member are concentrated on the hinge, there is a certain size tolerance between the components of the hinge. This tolerance is a factor of noise caused by vibration of construction machinery. In addition, although it is possible to provide only one hinge on the construction machine, in this case, vibration (load) during normal operation is concentrated on one hinge, so that noise at the hinge increases.

  Therefore, it is preferable that the construction machine includes a plurality of the hinges.

  According to this aspect, since the load per hinge can be reduced by distributing the load generated by the vibration of the construction machine to the plurality of hinges, the noise generated by the vibration of the construction machine can be reduced. In particular, when an increase in the size of the opening / closing member is required, the noise reduction effect becomes significant by using a plurality of hinges smaller than this when compared with the case where one large hinge is provided.

  Here, the operator may hold the opening / closing member rotated to the open position at the time of maintenance, but in this case, the burden on the operator at the time of maintenance increases.

  Therefore, in the construction machine, the opening position is set above the rotation center of the opening / closing operation member, and the construction machine includes a mounting portion on which the opening / closing operation member in the opening position can be mounted. It is preferable.

  According to this aspect, since the opening state of the opening can be maintained by placing the opening / closing member on the placement portion, the burden on the operator during maintenance can be reduced.

  According to the present invention, daily maintenance can be performed efficiently while preventing the loss of the butterfly bolt.

1 is a side view showing an overall configuration of a hydraulic excavator according to a first embodiment of the present invention. It is the II-II sectional view taken on the line of FIG. FIG. 3 is a plan view of FIG. 2. It is a front view of the guard of Drawing 2 seen from the engine side. It is a side view of the guard shown in FIG. It is a top view of the guard shown in FIG. It is a front view which abbreviate | omits and shows a part of guard of FIG. It is a front view which abbreviate | omits and shows a part of guard which concerns on 2nd Embodiment of this invention. It is the IX-IX sectional view taken on the line of FIG. It is a front view which abbreviate | omits and shows a part of guard which concerns on 3rd Embodiment of this invention. It is the XI-XI sectional view taken on the line of FIG. It is sectional drawing of the guard which concerns on 4th Embodiment of this invention, and shows the state by which the opening / closing operation member was clamped. It is sectional drawing of the guard shown in FIG. 12, and shows the state by which the opening / closing operation member was released. It is sectional drawing of the guard shown in FIG. 12, and shows the state which the opening / closing operation member moved to the non-clamping position.

  Embodiments of the present invention will be described below with reference to the accompanying drawings. The following embodiments are examples embodying the present invention, and are not of a nature that limits the technical scope of the present invention.

<First Embodiment (FIGS. 1 to 7)>
Referring to FIG. 1, a hydraulic excavator 1 as an example of a construction machine according to a first embodiment of the present invention is attached to a lower traveling body 2 having a crawler 2 a and to the lower traveling body 2 so as to be able to turn. An upper swing body 3 having an upper frame 11 and an attachment 4 attached to the upper swing body 3 are provided.

  The attachment 4 includes a boom 5 having a base end portion rotatably attached to the upper frame 11 of the upper swing body 3 and a base end portion rotatably attached to the tip end portion of the boom 5. The arm 6 and the bucket 7 that is rotatably attached to the tip of the arm 6.

  The attachment 4 also has a boom cylinder 8 that rotates the boom 5 relative to the upper frame 11, an arm cylinder 9 that rotates the arm 6 relative to the boom 5, and a bucket 7 that rotates relative to the arm 6. Bucket cylinder 10.

  The upper swing body 3 has a cab 12 provided on the upper frame 11. Hereinafter, description will be made using the direction seen from the operator seated on the driver's seat in the cab 12. The cab 12 is provided at the left front portion of the upper frame 11.

  As shown in FIGS. 1 and 2, the upper swing body 3 includes an engine 13, a cooler 14, a cooling fan 15, a shroud 16, and a guard 17 provided on the upper frame 11.

  The engine 13 is provided behind the cab 12 and has an output shaft 13 a that extends to the left from the main body of the engine 13. The output shaft 13a is provided with a pulley 13b, and a fan belt (not shown) is hung on the pulley 13b. The engine 13 is supported from below by a vertical plate (not shown) standing on the upper frame 11.

  The cooler 14 is provided on the left side of the engine 13. The cooler 14 includes at least one of a radiator for cooling the coolant of the engine 13 and an oil cooler for cooling hydraulic oil supplied to a hydraulic actuator including the cylinders 8 to 10.

  The cooling fan 15 is provided between the engine 13 and the cooler 14. The cooling fan 15 includes a fan main body 15a, a rotating shaft 15b extending rightward from the fan main body 15a, and a pulley (not shown) provided on the rotating shaft 15b. A fan belt (not shown) is stretched over.

  The shroud 16 extends from the cooler 14 toward the cooling fan 15 in order to adjust the cooling air to the cooler 14 by the cooling fan 15. Specifically, the shroud 16 surrounds the extension line of the rotating shaft 15b of the cooling fan 15 and extends to the left side from the cooler 14, and the end of the peripheral wall 16a opposite to the cooler 14 (right side). And a side wall 16b extending to the cooling fan 15 side, and an opening 16c formed in the side wall 16b. A fan main body 15a of the cooling fan 15 is disposed inside the opening 16c.

  The guard 17 is attached to the shroud 16 so as to cover the cooling fan 15 from the engine 13 side (right side). As shown in FIG. 2, the guard 17 covers the engine side portion of the fan main body 15 a and the pulley 13 b from above, and covers the upper portion of the fan main body 15 a when the fan main body 15 a is viewed from above the engine 13. Is arranged. The guard 17 restricts an operator located above the engine 13 from accessing the cooling fan 15.

  As shown in FIGS. 3 to 6, the guard 17 includes a fixing member 18 fixed to the shroud 16, an opening / closing operation member 19, and the opening / closing operation member 19 so that the opening / closing operation member 19 can rotate with respect to the fixing member 18. And two hinges (allowing mechanism) 20 for connecting the opening / closing member 19 to the fixed member.

  The fixing member 18 has an opening 18 a (see FIG. 3) for opening a space between the engine 13 and the cooler 14. Specifically, the opening 18a is formed in a region overlapping the pulley 13b in a plan view when the upper frame 11 is viewed from above.

  The fixing member 18 includes a mounted portion 23 that is fixed to the shroud 16 by a bolt B1, an upper covering portion 24 that covers a space between the engine 13 and the cooler 14, and a cooling fan 15 (fan It has a horizontal covering portion 25 that covers the upper portion of the main body 15a) from the engine 13 side, and a nut (female screw portion: see FIG. 5) 26 fixed to the horizontal covering portion 25.

  The upper covering portion 23 has a wide portion 27 having the same width dimension (a dimension in the front-rear direction) as the attached portion 23 and a wide portion 27 extending from the upper frame 11 side (lower) end portion of the attached portion 23 to the engine 13 side. An extending portion 28 extending from one end (rear) of the width direction of the portion 27 (hereinafter simply referred to as the width direction; in the present embodiment, the width direction and the front-rear direction are parallel) to the engine 13 side. .

  The lateral covering portion 25 extends from the end of the extending portion 28 on the engine 13 side to the upper frame 11 side (downward), and inclines so as to extend toward the engine 13 side from the extending portion 28 toward the upper frame 11 side. doing.

  Further, the lateral covering portion 25 includes a covering portion main body 29 extending from the end on the engine 13 side of the extending portion 28 to the upper frame 11 side, and the other end in the width direction from the end portion of the covering portion main body 29 on the upper frame 11 side. And a support portion 30 extending to the side (front). The covering portion main body 29 is formed with a vent hole 29a that allows air to pass between the engine 13 side and the cooler 14 side of the covering portion main body 29. In addition, a through hole 30 a is formed in the support portion 30. A nut 26 is fixed to the surface of the support portion 30 facing the upper frame 11 so as to be concentric with the through hole 30 a of the support portion 30.

  An opening that is opened and closed by an opening / closing operation member 19 to be described later is provided on the engine 13 side of the wide portion 27 of the upper covering portion 23 and on the other side (front) of the extending portion 28 and the lateral covering portion 25 in the width direction. 18a is formed.

  The opening / closing operation member 19 includes an upper covering portion 31 that covers the space between the engine 13 and the cooler 14 from above, and a lateral covering portion 32 that covers the cooling fan 15 (fan main body 15a) from the engine 13 side.

  The upper covering portion 31 is for covering the opening 18a of the fixing member 18 from above.

  The lateral covering portion 32 is for covering the opening 18a of the fixing member 18 from the engine 13 side. Further, the lateral covering portion 32 has a vent 32a that allows ventilation between the engine 13 side and the cooler 14 side of the lateral covering portion 32, and a slit (allowing mechanism) that allows movement of a butterfly bolt 21 described later. 32b. The slit 32b is provided at one end (rear) end in the width direction of the lateral covering portion 32, and has a shape that penetrates the lateral covering portion 32 and opens to one side in the width direction.

  The hinge 20 is rotatable between a closed position (indicated by a solid line in FIG. 5) for closing the opening 18a of the fixing member 18 and an open position (indicated by a two-dot chain line in FIG. 5) for opening the opening 18a. The opening / closing operation member 19 is attached to the fixing member 18. The two hinges 20 are arranged side by side in the width direction.

  Specifically, the hinge 20 includes a fixing plate 33 fixed to a surface (lower surface) facing the upper frame 11 side of the upper covering portion 24 of the fixing member 18 and a pair of shaft support portions 34 provided on the fixing plate 33. A rotation shaft 35 supported between the shaft support portions 34, a rotation portion 37 pivotally supported by the rotation shaft 35, and being fixed to the rotation portion 37 and opened and closed. A rotating plate 36 fixed to a surface of the upper covering portion 31 of the operating member 19 facing the upper frame 11 side.

  The rotation shaft 35 is provided along the width direction. As shown in FIG. 5, the closing position of the opening / closing member 19 is set below the rotation center of the opening / closing member 19 (the axis of the rotating shaft 35), and the opening position of the opening / closing member 19 is the opening / closing point. It is set above the rotational center of the operating member 19. In the present embodiment, the opening / closing operation member 19 rotated to the open position is placed on the corners of the peripheral wall 16a and the side wall 16b of the shroud 16 (the shroud 16 corresponds to the placing portion).

  The hinge 20 connects the opening / closing member 19 to the fixing member 18 so as to allow the opening / closing member 19 to move relative to the fixing member 18 along the rotation center of the opening / closing member 19.

  Specifically, the distance between the shaft support portions 34 is set to a distance obtained by adding the slide dimension R1 (see FIGS. 4 and 6) to the width-direction dimension of the rotating portion 37. Therefore, the opening / closing operation member 19 includes the holding position shown in FIG. 4 in which the rotating portion 37 is in contact with the one (rear) shaft support portion 34 and the rotating portion 37 on the other (front) shaft support portion 34. It can move by the amount of the slide dimension R1 between the abutting position shown by the solid line in FIG. The clamping position and the non-clamping position will be described in detail later. 6 and 7, the illustration of the butterfly bolt 21 is omitted for convenience of explanation.

  Here, the support portion 30 of the fixing member 18 supports the opening / closing operation member 19 in the closed position from the bottom of the opening / closing operation member 19 between the sandwiching position and the non-holding position. That is, the opening / closing operation member 19 in the closed position is in contact with the upper surface of the support portion 30. Further, the support portion 30 is provided at a position capable of supporting the distal end portion farthest from the rotation center of the opening / closing operation member 19.

  Further, the region above the support portion 30 in the opening 18a is opened from the opening / closing operation member 19 in a state where the opening / closing operation member 19 is in the non-clamping position (see FIG. 7), and the opening / closing operation member 19 is clamped. It is closed by the opening / closing member 19 in the position.

  Further, the guard 17 includes a butterfly bolt 21 for fixing the opening / closing operation member 19 moved to the clamping position, and two retaining nuts (regulations) for restricting the butterfly bolt 21 from coming off from the nut 26 (see FIG. 5). Mechanism) 22.

  The butterfly bolt 21 has a bolt main body 21a and a head 21b.

  The bolt main body 21 a is screwed into the female thread portion 26 a (see FIG. 7) of the nut 26 through the through hole 30 a of the support portion 30 in the fixing member 18. In this state, the head 21 b of the butterfly bolt 21 is disposed on the engine 13 side of the support portion 30.

  Further, the bolt body 21 a has a diameter dimension that can be inserted into the slit 32 b of the opening / closing member 19. Further, when the opening / closing operation member 19 is moved to the clamping position as shown by a two-dot chain line in FIG. 7, the female thread portion 26a of the nut 26 is disposed in the slit 32b, and as shown by the solid line in FIG. The positions of the female screw portion 26a and the through-hole 30a, and the slide dimension R1 and the length dimension of the slit 32b so that the female screw portion 26a is disposed outside the slit 32b when the operating member 19 is moved to the non-clamping position. L1 is set. Specifically, the slide dimension R1 is set to be not less than the length dimension L1 of the slit 32b of the opening / closing operation member 19. Furthermore, the diameter dimension of the head 21b of the butterfly bolt 21 is set larger than the width dimension of the slit 32b.

  Therefore, by tightening the bolt main body 21a of the butterfly bolt 21 to the female threaded portion 26a of the nut 26, the opening / closing operation member 19 is sandwiched between the head 21b of the butterfly bolt 21 and the fixing member 18, as shown in FIG. The

  On the other hand, by loosening the butterfly bolt 21 with respect to the female thread portion 26 a of the nut 26, the gap between the head 21 b of the butterfly bolt 21 and the fixing member 18 is increased, and the opening / closing operation member 19 is separated from the butterfly bolt 21 and the fixing member 18. To be released. In this state, as shown in FIG. 7, the opening / closing operation member 19 is moved to the non-clamping position to open the opening / closing operation member 19 at a position outside the clamping range of the butterfly bolt 21 (two-dot chain line in FIG. 5). Can be rotated).

  As described above, the butterfly bolt 21 is engaged with the fixing member 18 by screwing with the female screw portion 26a provided in the fixing member 18 in a state where the opening / closing operation member 19 is rotated to the closed position. Is inserted. Thereby, the opening / closing member 19 rotated to the closed position can be fixed to the fixing member 18.

  In the present embodiment, the slit 32b and the hinge 20 of the opening / closing operation member 19 are included in the clamping range (the head 21b and the fixing member 18) between the butterfly bolt 21 and the fixing member 18 with the opening / closing operation member 19 in the closed position. The opening / closing operation member 19 is allowed to move so that the opening / closing operation member 19 is arranged at a position deviating from the range between the two.

  The retaining nut 22 is screwed to the end of the bolt main body 21a opposite to the head 21b. When the two retaining nuts 22 are screwed into the bolt body 21a, the both retaining nuts 22 are restricted from rotating in the tightening direction and the loosening direction with respect to the bolt body 21a.

  Therefore, when the butterfly bolt 21 is loosened with respect to the female screw portion 26a as described above, it is possible to restrict the butterfly bolt 21 from coming off from the female screw portion 26a.

  The both retaining nuts 22 may be fixed to the bolt body 21a by welding or the like, and one retaining nut 22 fixed to the bolt body 21a by welding or the like may be used as a regulating mechanism.

  As described above, the opening / closing operation member 19 is interposed between the butterfly bolt 21 and the fixing member 18 by tightening the butterfly bolt 21 that can be operated without using a tool while the opening / closing operation member 19 is rotated to the closed position. The opening / closing operation member 19 can be fixed in the closed position by sandwiching 19.

  On the other hand, when the butterfly bolt 21 is loosened, the pinching of the opening / closing operation member 19 by the butterfly bolt 21 and the fixing member 18 can be released. In this state, the opening / closing operation member 19 is moved to a position outside the clamping range. Thus, the opening / closing member 19 can be rotated from the closed position to the open position.

  In this state where the opening / closing operation member 19 is rotated to the open position, the operator performs daily maintenance (for example, a configuration provided between the engine 13 and the cooler 14 through the opening 18a of the fixing member 18). The confirmation of the tension of the fan belt hung on the pulley 13b can be performed.

  Further, when the opening / closing operation member 19 is unpinned by the butterfly bolt 21 as described above, the retaining nut 22 can restrict the butterfly bolt 21 from coming off from the female screw portion 26a. It is possible to prevent the bolt 21 from entering (falling) between the engine 13 and the cooler 14.

  As described above, by rotating the opening / closing operation member 19 to the open position and opening the opening 18a of the fixing member 18, it is possible to efficiently perform daily maintenance, and the butterfly bolt 21 can be removed from the female screw portion 26a. The loss of the butterfly bolt 21 can be prevented by restricting the detachment.

  Moreover, according to 1st Embodiment, there can exist the following effects.

  During the period in which the opening / closing member 19 is moved, the weight of the opening / closing member 19 can be deposited on the support 30 of the fixing member 18, so that the burden on the operator when opening / closing the opening / closing member 19 can be reduced. .

  Since the support portion 30 supports the tip portion farthest from the rotation center of the opening / closing operation member 19, compared to the case where the support portion 30 supports a portion closer to the rotation center than the tip portion of the opening / closing operation member 19. It is possible to reduce the load generated in the support portion 30 in order to support the weight of the opening / closing operation member 19.

  The opening 18a is released from the opening / closing operation member 19 in a state where the opening / closing operation member 19 is in the non-clamping position, and is closed by the opening / closing operation member 19 in a state where the opening / closing operation member 19 is in the clamping position (see FIG. 7). A region above the support 30. Thereby, the opening area of the portion corresponding to the movement range of the opening / closing operation member 19 can be expanded as compared with the case where an opening having a shape that is entirely covered with the opening / closing operation member 19 in the non-clamping position is adopted. it can. Therefore, as described above, it is possible to ensure a large area of the opening 18a while forming the support portion 30 for realizing the support of the opening / closing member 19 across the clamping position and the non-clamping position. Therefore, maintenance can be performed more efficiently.

  Since the hinge 20 having both the function for rotating the opening / closing operation member 19 and the function for moving it is adopted, the cost can be reduced as compared with the case where both functions are realized by separate configurations. .

  When the function for rotating the opening / closing operation member 19 and the function for moving the opening / closing operation member 19 are integrated in the hinge 20, a certain size tolerance is required between the components of the hinge 20. The tolerance becomes a cause of noise caused by vibration of the hydraulic excavator 1. Although it is possible to provide only one hinge 20 on the excavator 1, in this case, vibration (load) during normal operation is concentrated on one hinge 20, so that noise at the hinge 20 increases.

  On the other hand, since the two hinges 20 are provided, the load per one of the hinges 20 can be reduced by distributing the load generated by the vibration of the hydraulic excavator 1 to the plurality of hinges 20. Noise generated by vibration of the hydraulic excavator 1 can be reduced. In particular, when an increase in the size of the opening / closing member 19 is required, the noise reduction effect is greater by using a plurality of hinges smaller than this when compared with the case of providing one large hinge.

  Since the opening / closing operation member 19 is placed on the placement portion (the peripheral wall 16a and the side wall 16b of the shroud 16), the open state of the opening 18a can be maintained, so that the burden on the operator during maintenance can be reduced. it can.

<Second Embodiment (FIGS. 8 and 9)>
In the first embodiment, the butterfly bolt 21 and the nut 26 are attached to the fixing member 18, but their attachment positions are not limited to the fixing member 18.

  In the guard 17 according to the second embodiment, a butterfly bolt 21 and a nut 26 are attached to the opening / closing member 19.

  Hereinafter, the guard 17 according to the second embodiment will be described with reference to FIGS. 8 and 9. In addition, about the structure similar to 1st Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  The guard 17 includes a fixing member 38 fixed to the shroud 16 and an opening / closing operation member 41 attached to the fixing member 38 so as to be rotatable.

  The lateral covering portion 25 of the fixing member 38 includes the covering portion main body 29, a sandwiched portion 39 extending from the end of the covering portion main body 29 on the upper frame 11 side to the other side (front) in the width direction, and a sandwiched portion 39. And a pair of support portions 40 provided on the upper frame 11 side (lower).

  The sandwiched portion 39 has a slit 39a that penetrates the sandwiched portion 39 and opens to the other side in the width direction.

  The support part 40 is for supporting the opening / closing operation member 41 in the closed position from the clamping position to the non-clamping position. Specifically, the support portion 40 includes a base end portion connected to the covering portion main body 29 and a support piece extending from the base end portion to the other side in the width direction of the sandwiched portion 39. The support piece is disposed in parallel with the sandwiched portion 39 with a gap corresponding to the thickness dimension of the opening / closing operation member 41 between the support piece 39 and the other side in the width direction of the sandwiched portion 39. Extends to the side. Moreover, both the support parts 40 are arrange | positioned at both sides on both sides of the slit 39a.

  The lateral covering portion 32 in the opening / closing member 41 has a through hole 32c through which the butterfly bolt 21 is passed. A nut 26 is fixed to the surface of the lateral covering portion 32 facing the upper frame 11 side so as to be concentric with the through hole 32c. The through-hole 32c and the nut 26 are formed in the through-hole 30a and the female screw portion 26a in the slit 39a when the opening / closing member 41 moves to the clamping position, and the through-hole 32c and the nut 26 when the opening / closing member 41 moves to the non-holding position. It arrange | positions so that 30a and the internal thread part 26a may be located in the outer side of the slit 39a.

  According to the second embodiment, when the opening / closing member 41 is rotated to the closed position, the opening / closing member 41 is supported from below the opening / closing member 41 by the two support portions 40 as shown in FIG. The

  In this way, from the state where the opening / closing member 41 is in the non-clamping position, the opening / closing member 41 is slid to move the opening / closing member 41 to the clamping position. As a result, the opening / closing member 41 is inserted between the support portions 40 and the sandwiched portion 39, and the through hole 30a and the female screw portion 26a are disposed in the slit 39a. At the same time, the sandwiched portion 39 is inserted between the head 21 b of the butterfly bolt 21 and the upper surface of the opening / closing member 41.

  In this state, the opening / closing operation member 41 is clamped between the head 21b of the butterfly bolt 21 and the opening / closing operation member 41 by tightening the butterfly bolt 21 with respect to the female thread portion 26a.

  On the other hand, by loosening the butterfly bolt 21 with respect to the female thread portion 26a and moving the opening / closing operation member 41 to the non-clamping position, the clamped portion 39 is released from the butterfly bolt, so that the opening / closing operation member 41 is rotated to the open position. Can move.

  In the second embodiment, the hinge 20 and the slit 39a of the fixing member 38 are opened and closed at a position deviated from the clamping position between the butterfly bolt 21 and the fixing member 38 in a state where the opening and closing operation member 41 is in the closed position. An allowance mechanism that allows movement of the opening / closing operation member 41 so as to arrange the member 41 is configured.

<Third Embodiment (FIGS. 10 and 11)>
In the above embodiment, the configuration in which the butterfly bolt 21 is fixed and the opening / closing operation members 19 and 41 move is described. However, the present invention is not limited to the movement of the opening / closing operation members 19 and 41.

  In the guard 17 according to the third embodiment, the butterfly bolt 21 is movable.

  Hereinafter, the guard 17 according to the third embodiment will be described with reference to FIGS. 10 and 11. In addition, about the structure similar to 1st Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  The guard 17 according to the third embodiment includes a fixing member 42 and an opening / closing operation member 43.

  The lateral covering portion 25 of the fixing member 42 includes the covering portion main body 29, a support portion 44 extending from the end of the covering portion main body 29 on the upper frame 11 side to the other side in the width direction, and the support portion 44 on the upper frame 11 side. And a nut 26 held by the nut holding portion 45.

  The support part 44 supports the opening / closing operation member 43 in the closed position from below. Specifically, the support portion 44 has a long hole 44a that penetrates the support portion 44 and extends in the width direction.

  The nut holding part 45 has a pair of side walls extending in a direction orthogonal to the support part 44 from the support part 44 and a bottom wall connecting the side walls to each other. Both side walls are provided at positions that sandwich the elongated hole 44a in a direction perpendicular to the longitudinal direction. Moreover, the space | interval of a both-sides wall is set to the space | interval which can insert the nut 26. FIG. The bottom wall is provided at a position facing the elongated hole 44a in a state in which a space is inserted between the support portion 44 and the nut 26 can be inserted. Further, the bottom plate has a long hole 45 a formed at a position overlapping the long hole 44 a of the support portion 44. The width dimension of the long holes 44a and 45a is such that the bolt body 21a of the butterfly bolt 21 can be inserted into the long holes 44a and 45a, and the bolt body 21a can move along the longitudinal direction of the long holes 44a and 45a. It is set to become.

  The nut 26 is accommodated between the support portion 44 and the nut holding portion 45 so as to be movable along the longitudinal direction of both the long holes 44a and 45a.

  The bolt main body 21a of the butterfly bolt 21 passes through the elongated hole 44a of the support portion 44, the female thread portion 26a of the nut 26, and the elongated hole 45a of the nut holding portion 45, and the cooler 14 side of the fixing member 42 and the engine 13 side. It is arranged over.

  The retaining nut 22 is fixed to the end of the bolt body 21a on the cooler 14 side.

  The opening / closing member 43 has a slit 43a that penetrates the opening / closing member 43 and opens on one side (rear) in the width direction. The slit 43a is formed at a position overlapping the elongated holes 44a and 45a in a state where the opening / closing operation member 43 is rotated to the closed position. On the other hand, the long holes 44a and 45a are formed so as to extend from the slit 43a on one side (rear side) in the width direction in a state where the opening / closing member 43 is turned to the closed position.

  According to the third embodiment, as shown in FIGS. 10 and 11, the head of the butterfly bolt 21 is tightened by tightening the butterfly bolt 21 with respect to the nut 26 in a state where the opening / closing operation member 43 is rotated to the closed position. The opening / closing member 43 can be sandwiched between the portion 21 b and the support portion 44.

  On the other hand, the butterfly bolt 21 is loosened with respect to the nut 26, and the butterfly bolt 21 and the nut 26 are moved to one side (rear) in the width direction along the elongated holes 44a and 45a, thereby opening and closing the opening / closing member 43. Move relative to the clamping range. Thereby, the opening / closing member 43 is released from the butterfly bolt 21, and the opening / closing member 43 can be rotated to the open position.

  In the third embodiment, the elongated holes 44a and 45a of the fixing member 42 and the slit 43a of the opening / closing operation member 43 are clamped between the butterfly bolt 21 and the fixing member 42 in a state where the opening / closing operation member 43 is in the closed position. A permissive mechanism that permits the movement of the butterfly bolt 21 is configured so that the opening / closing operation member 43 is disposed at a position outside the range.

<Fourth Embodiment (FIGS. 12 to 14)>
In the embodiment, the slits 32b, 39a, and 43a are used as the allowance mechanism, but the slit can be omitted from the allowance mechanism.

  The guard 17 according to the fourth embodiment employs an allowance mechanism that does not have a slit.

  Hereinafter, the guard 17 according to the fourth embodiment will be described with reference to FIGS. 12 to 14. In addition, about the structure similar to the said embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  The guard 17 according to the fourth embodiment includes a fixing member 46 and an opening / closing operation member 47. 12 to 14 are cross-sectional views when a plane perpendicular to the lateral covering portion 25 of the fixing member 46 and parallel to the width direction (front-rear direction) is viewed from the upper frame 11 side.

The lateral covering portion 25 of the fixing member 46 includes the covering portion main body 29, a nut holding portion 49 extending from the covering portion main body 29 to the other side (front) in the width direction, and the upper frame 11 side (lower) of the nut holding portion 45. And a nut 26 fixed to the nut holding portion 49.

  The nut holding part 49 has a through hole 49 a that penetrates the nut holding part 49. The nut 26 is fixed to the surface of the nut holding portion 49 facing the upper frame 11 (downward) in a state of being arranged concentrically with the through hole 49a.

  The support part 48 is for supporting the opening / closing operation member 47 rotated to the closed position. Specifically, the support portion 48 includes a gap forming portion (reference number omitted) extending from the lateral covering portion 25 on the upper frame 11 side, and a support portion main body (reference number omitted) extending from the gap forming portion to the other side (front) in the width direction. And having. The gap forming portion has a length for forming a gap that can accommodate the nut 26, the retaining nut 22 and the opening / closing operation member 43 between the nut holding portion 49 and the support portion main body. The support portion main body extends in the width direction beyond the nut holding portion 49.

  The bolt body 21a of the butterfly bolt 21 is provided across both the front and back sides of the nut holding portion 49 through the through hole 49a and the female screw portion 26a. A retaining nut 22 is fixed to the end of the bolt body 21a on the upper frame 11 side.

  Similarly to the first and second embodiments, the opening / closing member 47 is attached to the fixing member 46 so as to be movable in the width direction by the slide dimension R1 of the hinge 20.

  According to the fourth embodiment, as shown in FIG. 12, by tightening the butterfly bolt 21 with respect to the female thread portion 26a, the opening / closing operation member 47 that has been rotated to the closed position and moved to the clamping position is bolted. It can be clamped between the front end portion of the main body 21 a and the support portion 48 of the fixing member 46.

  As shown in FIG. 13, by loosening the butterfly bolt 21 with respect to the female thread portion 26a, the tip of the bolt body 21a is separated from the opening / closing operation member 47, and the opening / closing operation member 47 is released from the butterfly bolt 21. it can.

  In this state, as shown in FIG. 14, by moving the opening / closing member 47 to the non-clamping position, the opening / closing member 47 can be rotated to the open position.

  As shown in FIGS. 13 and 14, the support portion 48 has a length capable of supporting the opening / closing operation member 47 from below in a range between the sandwiching position and the sandwiched position.

  In addition, this invention is not limited to the said embodiment, For example, the following aspects can also be employ | adopted.

  In the embodiment, the engine 13 and the cooler 14 are arranged side by side in the left-right direction, but the direction in which the engine 13 and the cooler 14 are arranged is not limited to this.

  In the above-described embodiment, the shroud 16 is exemplified as the placement portion, but the placement portion is not limited to the shroud 16. For example, a part of the guard 17 or a configuration other than the shroud 16 and the guard 17 can be used as the placement unit.

  Although the said embodiment demonstrated the example in which the hinge 20 was included in the allowance mechanism which accept | permits the movement of the opening / closing operation member along the rotation center of an opening / closing operation member, the hinge 20 is not essential for an allowance mechanism. For example, one of the opening / closing operation member and the fixed member is provided with a rotation shaft, and the other is provided with a support tube that rotatably supports the rotation shaft, so that the support tube can move the rotation shaft in the axial direction. It can also be configured to support. In this case, the permission mechanism includes an opening / closing member and a fixing member.

  The construction machine is not limited to a hydraulic excavator, and may be a crane and a dismantling machine, or a hybrid construction machine.

1 Hydraulic excavator (an example of construction machinery)
13 Engine 14 Cooler 15 Cooling Fan 16 Shroud 17 Guard 18, 38, 42, 46 Fixing Member 18a Opening 19, 41, 43, 47 Opening / Closing Operation Member 20 Hinge (allowable mechanism)
21 Wing bolt 22 Retaining nut (regulation mechanism)
26a Female thread part 30, 40, 44, 48 Support part 32b, 39a, 43a Slit (allowable mechanism)
44a, 45a Slotted hole (allowable mechanism)

Claims (7)

A construction machine,
Engine,
A cooler,
A cooling fan provided between the engine and the cooler;
A shroud extending from the cooler to the cooling fan in order to adjust cooling air to the cooler by the cooling fan;
A guard attached to the shroud so as to cover the cooling fan from the engine side,
The guard has an opening for opening a space between the engine and the cooler, and is fixed between the fixing member fixed to the shroud, and a closed position for closing the opening and an opening position for opening the opening. the opening and closing operation member mounted pivotably relative to the stationary member, a one member of said fixing member and said opening and closing member in a state in which the opening and closing member is rotated to said closed position and in butterfly sandwiching the fixing member and the clamping member other than said screw member of said opening and closing member between the screw member by the female screw portion is screwed into the female screw portion of the screw-side member provided A bolt, a restricting mechanism for restricting the butterfly bolt from coming off from the female screw portion, and between the butterfly bolt and the screw side member in a state where the opening / closing member is in the closed position. Wherein a position deviated from the clamped range with the allowable mechanism to allow at least one of movement of the wing bolt and said opening and closing member so as to be clamped member is disposed, and construction equipment. The construction machine according to claim 1,
The closed position is set below the rotation center of the opening / closing member,
The permissive mechanism is configured to move the opening / closing operation member along the rotation center between a holding position where the opening / closing operation member overlaps the holding range and a non-holding position where the opening / closing operation member is out of the holding range. Allow,
The construction machine, wherein the fixing member has a support portion that supports the opening / closing operation member in the closed position from below the opening / closing operation member over the holding position and the non-holding position. The construction machine according to claim 2,
The construction machine is a construction machine, wherein the support part is provided at a position capable of supporting a tip part farthest from the rotation center of the opening / closing member. The construction machine according to claim 2 or 3,
The opening includes a region which is opened from the opening / closing operation member in a state where the opening / closing operation member is in the non-clamping position, and is closed by the opening / closing operation member in a state where the opening / closing operation member is in the clamping position. Construction machinery. The construction machine according to any one of claims 2 to 4, wherein the opening / closing operation member is rotatable between the closed position and the opening position, and along the rotation center of the opening / closing operation member. And further comprising at least one hinge for connecting the opening / closing member to the fixing member to allow movement of the opening / closing member with respect to the fixing member,
The accepting mechanism is a construction machine including the hinge.   The construction machine according to claim 5, wherein the construction machine includes a plurality of the hinges. The construction machine according to any one of claims 1 to 6,
The opening position is set above the rotation center of the opening and closing member,
The construction machine includes a placement unit on which the opening / closing member at the open position can be placed.

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