JP5437130B2 - Hood holding device - Google Patents

Description

  The present invention relates to a hood holding device that holds an openable hood of a traveling machine in an open state.

  2. Description of the Related Art Conventionally, traveling machines such as construction machines (such as hydraulic excavators) and industrial vehicles (such as forklifts) are provided with an openable hood in order to ensure the maintainability of equipment in the hood. In general, an openable hood is rotatably supported by a vehicle body and can be held open by a hood holding device. As such a hood holding device, a device using a rod-like stay is known (for example, see Patent Document 1).

  In the hood holding device described in Patent Document 1, one end side of the stay is rotatably supported by the hood, and the other end side of the stay is hooked in a guide groove provided in the vehicle body along the horizontal direction. . When the hood is opened, the other end of the stay moves along the guide groove and is locked to the end of the guide groove, so that the hood is held in the open state.

JP 2007-112369 A

  However, in the hood holding device described in Patent Document 1, the stay moving space increases because one end side of the stay moves upward and the other end side of the stay moves in the horizontal direction while being guided by the guide groove. . In this case, there is a problem that devices cannot be arranged on the moving space of the stay, and the degree of freedom of arrangement layout of the devices around the hood is not sufficient.

  On the other hand, at the time of maintenance of equipment in the hood, the hood may not be fully opened due to the space limitation of the maintenance shop. However, the hood holding device of Patent Document 1 has a problem that the hood cannot be held half open and cannot be adapted to such a situation.

  The objective of this invention is providing the hood holding | maintenance apparatus which can improve the freedom degree of arrangement | positioning layout of the apparatus of a hood periphery, and can hold | maintain a hood in several opening positions.

The hood holding device of the present invention is a hood holding device that holds an openable hood pivotally supported by a vehicle body of a traveling machine in an open state, and a stay whose base end side is pivotally supported by the hood, A stay support member provided on a vehicle main body and supporting a distal end portion side of the stay, the stay support member including a shaft portion extending in parallel with a support shaft of the hood, and the stay at the base end portion A guide groove extending toward the shaft portion of the stay support member, and a plurality of guide grooves provided continuously to the guide groove on one side of the guide groove and locked to the shaft portion of the stay support member And the base end portion is below the first line connecting the support shaft of the hood and the shaft portion of the stay support member when the hood is closed. And the hood When it, characterized in that it is pivotally supported to the hood upper side than the first line.

  In the present invention, the locking groove is provided to be inclined toward the base end side with respect to the guide groove, and a line along the tilting direction of the locking groove, the base end portion, and the locking groove It is desirable that the angle formed by the line connecting the two and the base end side is larger as the locking groove is located farther from the base end.

  In the present invention, the guide groove has an end portion on the base end portion side of the guide groove with respect to a second line connecting the base end portion and an end portion on the base end portion side of the guide groove. It is desirable to incline to the opposite side to the locking groove side as a starting point.

  In the present invention, the hood holding device includes an urging member that urges the hood in an opening direction, and the stay, the stay support member, and the urging member are provided substantially in parallel, and the urging member Is preferably provided between the stay support member and the stay.

According to the hood holding device of the present invention, since the base end portion of the stay is pivotally supported by the hood, the base end portion is formed on a virtual circle centering on the support shaft of the hood as the hood opens. Move upward. Here, since the guide has a guide groove extending toward the base end portion, the base end side of the stay gradually rises, and the guide is guided to the shaft portion of the stay support member accommodated in the guide groove. As a result, the distal end side of the stay moves toward the proximal end portion. Accordingly, the amount of stay movement in the horizontal direction can be suppressed and the space for moving the stay can be reduced, so that the degree of freedom in the layout of the devices around the hood can be improved.
In addition, since the stay of the hood holding device of the present invention is provided with a plurality of locking grooves on one side of the guide groove, when the stay moves in the base end direction in accordance with the operation of the stay described above. Each locking groove of the stay is locked to the shaft portion of the stay supporting member in order from the base end side. Therefore, the hood can be held at a plurality of opening positions.
Furthermore, the base end portion of the stay is pivotally supported by the hood below the first line connecting the support shaft of the hood and the shaft portion of the stay support member when the hood is closed, and the hood is fully opened. When the hood is pivotally supported by the hood above the first line, the stay is supported on the shaft part of the stay support member while the base end part of the stay is below the first line. After moving in the approaching direction and the base end portion of the stay moving above the first line, the stay moves in a direction away from the shaft portion of the stay support member. In this way, as the hood opens, the stay moves closer to or away from the shaft portion of the stay support member, so the space for moving the stay is further reduced compared to when the stay moves only in one direction. can do. Accordingly, it is possible to improve the degree of freedom of the arrangement layout of the devices.

  In the present invention, the locking groove is provided so as to be inclined toward the proximal end side with respect to the guide groove, and a line along the inclination direction of the locking groove and a line connecting the proximal end portion and the locking groove are based on the locking groove. When the angle formed on the end side is larger as the locking groove is located farther from the base end, the angle of the locking groove increases according to the distance from the base end. The direction approaches the tangential direction of each virtual circle with the radius from the base end portion to the locking groove. Therefore, when the stay rotates around the base end portion, the shaft portion of the stay support member can easily enter each locking groove, so that the hood can be reliably held.

  In the present invention, the guide groove is on the locking groove side starting from the end on the base end side of the guide groove with respect to the second line connecting the base end and the end on the base end side of the guide groove. When the hood opens, the base end of the stay rises as the hood opens, and when the stay tilts with the base end facing up, the extending direction of the guide groove In order to approach the tangential direction of the virtual circle centered on the support shaft, the moving direction of the base end portion of the stay that moves on the virtual circle approaches the moving direction of the guide groove portion of the stay. In this case, since the stay moves in the longitudinal direction, the entire stay moves in parallel upward, so that the stay can be prevented from projecting downward due to rotation about the shaft portion of the stay support member. . Accordingly, it is possible to further improve the degree of freedom of the arrangement layout of the devices.

  In the present invention, when the stay, the stay support member, and the urging member are provided substantially in parallel, and the urging member is provided between the stay support member and the stay, the urging member includes the stay support member and the stay. Since the hood holding device can be reduced in size as compared with the case where the devices are arranged at different places, the degree of freedom in arrangement of the device layout can be further improved.

The side view which shows the traveling machine which concerns on one Embodiment of this invention. The side view of the hood holding | maintenance apparatus mounted in the traveling machine. The perspective view of a hood holding | maintenance apparatus. The top view of the stay which comprises some hood holding | maintenance apparatuses. Operation | movement explanatory drawing of a hood holding | maintenance apparatus.

[Schematic configuration of hydraulic excavator]
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 shows a hydraulic excavator 1 as a traveling machine according to an embodiment of the present invention. The excavator 1 includes a traveling device 2 and a vehicle body 3.

The traveling device 2 is provided below the vehicle body 3 and supports the vehicle body 3 so as to be rotatable in the horizontal direction. The traveling device 2 includes a pair of left and right crawler traveling bodies 21.
The vehicle body 3 includes a work machine 4 provided on the front side, a cab 5 provided on the center side, an engine 6 provided on the rear side, and a hydraulic pump driven by the engine 6 although not shown. And a hydraulic circuit including

  The work machine 4 includes a boom 41 that is pivotally supported in a vertically swingable manner with respect to a main frame that constitutes the vehicle main body 3, an arm 42 that is swingably provided at the tip of the boom 41, and a tip of the arm 42. A boom cylinder 44 that drives the boom 41, an arm cylinder 45 that drives the arm 42, and a bucket cylinder 46 that drives the bucket 43.

  The work machine 4 is supplied with pressure oil from a hydraulic circuit provided inside the vehicle body 3, and the cylinders 44 to 46 are expanded and contracted by the pressure oil, so that the bucket 43 is moved in the vertical direction, or the bucket 43 Can be changed, and various operations such as excavation work, leveling work, and sediment loading work can be performed. The work machine 4 is operated by an operator who has boarded the cab 5 operating a control lever provided inside the cab 5.

  The engine 6 is covered with an openable hood 61, and the hood 61 is rotatable around a support shaft P1 by a hinge 62 (see FIG. 2) having a support shaft P1 along the left-right direction of the vehicle body 3. It is supported by. The hood 61 can be held at a plurality of openings by the hood holding device 10.

[Configuration of hood holding device]
As shown in FIGS. 2 and 3, the hood holding device 10 includes a stay 7 whose base end 71 side is pivotally supported by the hood 61, and a stay support that is provided on the vehicle body 3 and supports the distal end side of the stay 7. A member 8 and a gas spring 9 as an urging member for connecting between the hood 61 and the stay support member 8 are provided. In such a hood holding device 10, the stay 7, the stay support member 8, and the gas spring 9 are provided substantially in parallel.

  The stay supporting member 8 includes a main body 81 fixed to the vehicle main body 3, a convex stay abutting portion 82 provided on the stay 7 side of the main body 81 and abutting the stay 7, and the stay abutting portion 82. A shaft portion 83 extending in parallel with the support shaft P <b> 1 of the hinge 62 and an urging member support portion 84 provided on the main body portion 81 are provided.

  As shown in FIG. 4, the stay 7 is provided at the base end portion 71 that is pivotally supported by the hood 61 by a support shaft P2 parallel to the support shaft P1 of the hood 61, and at the distal end portion side. A guide groove 72 that guides the shaft portion 83 of the stay support member 8, a first locking groove 73 that is formed continuously with the guide groove 72 and locks the shaft portion 83, a second locking groove 74, and a third engagement A stop groove 75 and a handle portion 76 provided in the vicinity of the guide groove 72 are provided. As shown in FIG. 2, when the hood 61 is closed, the stay 7 has a base end portion 71 that is more than the first line L <b> 1 that connects the support shaft P <b> 1 of the hood 61 and the shaft portion 83 of the stay support member 8. It is pivotally supported by the hood 61 on the lower side.

  The guide groove 72 is formed in a straight line and accommodates the shaft portion 83 of the stay support member 8. As shown in FIG. 4, the guide groove 72 has a base end portion 71 of the guide groove 72 with respect to a second line L2 connecting the base end portion 71 and the end portion of the guide groove 72 on the base end portion 71 side. The angle formed between the second line L2 and the line L3 along the extending direction of the guide groove 72 is inclined to the side opposite to the side of the locking grooves 73, 74, 75 starting from the end of the side. An obtuse angle is formed on the side opposite to the grooves 73, 74, 75 side. Further, the portion of the guide groove 72 closer to the base end portion 71 than the locking grooves 73, 74, 75 constitutes an accommodation portion 721 that accommodates the shaft portion 83 of the stay support member 8 when the hood 61 is closed, An end portion of the guide groove 72 opposite to the base end portion 71 constitutes a movement restricting portion 722 that abuts the shaft portion 83 of the stay supporting member 8 and restricts the movement of the stay 7 when the hood 61 is fully opened. To do.

  Each locking groove 73, 74, 75 is formed by cutting out one side of the guide groove 72, and is arranged in parallel on the one side. Specifically, each of the locking grooves 73, 74, 75 is formed on the side opposite to the base end portion 71 side and is linear guide surface portions 731, 741, 751 continuous with the guide groove 72, and one end side is a guide surface portion. 731, 741, 751 and arcuate end surface portions 732, 742, 752 that are continuous with the guide groove 72 at the other end. With such a configuration, the locking grooves 73, 74, and 75 are inclined toward the base end portion 71 with respect to the guide groove 72.

  Further, as shown in FIG. 4, the locking grooves 73, 74, and 75 include lines along the inclination direction of the locking grooves 73, 74, and 75, the base end portion 71, and the locking grooves 73, 74, and 75, respectively. 75 is formed so that the angle formed by the line connecting 75 to the base end portion 71 side becomes larger as the locking grooves 73, 74, 75 located at a position away from the base end portion 71. When the angles formed by 74 and 75 and the second line L2 connecting the base end portion 71 and the end portion of the guide groove 72 on the base end portion 71 side are θ1, θ2, and θ3, respectively, a relationship of θ1 <θ2 <θ3 Holds. That is, in the present embodiment, the angle formed by the extension lines of the guide surface portions 731, 741, 751 of the locking grooves 73, 74, 75 and the second line L 2 extending from the base end portion 71 is the base end portion 71. The larger the distance from In addition, here, in order to make the drawing easy to see, an angle formed by a line along the inclination direction of each of the locking grooves 73, 74, and 75 and the second line L2 extending from the base end portion 71 is shown. However, the angle formed by the line along the inclination direction of each locking groove 73, 74, 75 and the line connecting the base end 71 and each locking groove 73, 74, 75 is also an angle. The magnitude relationship between them is the same.

  The gas spring 9 is disposed between the stay support member 8 and the stay 7 and is rotatably supported at one end side by the vehicle body 3 and at the other end side by the biasing member support portion 84 of the stay support member 8. The gas spring 9 assists the operating force when the hood 61 is opened, and prevents a sudden movement of the hood 61 when the hood 61 is closed.

  In the excavator 1 provided with the hood holding device 10 as described above, when the hood 61 is opened, the hood 61 is rotated upward by holding a handle portion (not shown) of the hood 61. At this time, as shown in FIG. 5, the base end portion 71 of the stay 7 moves upward on the virtual circle C <b> 1 centering on the support shaft P <b> 1 of the hood 61. Here, since the base end portion 71 is supported below the first line L1 connecting the support shaft P1 of the hood 61 and the shaft portion 83 of the stay support member 8 when the hood 61 is closed. First, the stay 7 moves in a direction approaching the shaft portion 83 of the stay support member 8 while gradually raising the base end portion 71 side. In this state, the shaft portion 83 of the stay support member 8 moves in the housing portion 721 of the guide groove 72.

  Thereafter, when the base end portion 71 rises to a position that is horizontal to the support shaft P1 beyond the first line L1, the stay 7 supports the stay in the opposite direction, while the base end portion 71 side further rises. It starts to move away from the shaft 83 of the member 8. When the first locking groove 73 closest to the base end portion 71 reaches the position of the shaft portion 83 of the stay support member 8 due to the movement of the stay 7, the stay 7 is rotated downward by its own weight, and the shaft portion 83 is rotated. Enters the first locking groove 73. When the upward rotation operation of the hood 61 is stopped at this position, the first locking groove 73 is locked to the shaft portion 83 and the hood 61 is held at the first position.

  When the hood 61 is further raised from this position, the base end portion 71 of the stay 7 moves obliquely upward along the virtual circle C1. At this time, the guide groove 72 is opposite to the locking grooves 73, 74, and 75 side with respect to the second line L 2 connecting the base end portion 71 and the end portion of the guide groove 72 on the base end portion 71 side. In other words, since it is inclined downward, the movement direction of the base end portion 71 of the stay 7 and the extending direction of the guide groove 72 become parallel with the opening operation of the hood 61. For this reason, the stay 7 moves in the longitudinal direction and moves in parallel upward, so that the stay 7 can be prevented from protruding downward due to the rotation about the shaft portion 83.

  When the second locking groove 74 reaches the position of the shaft portion 83 due to the movement of the stay 7, the second locking groove 74 is locked to the shaft portion 83, and the hood 61 is held at the second position. The If the hood 61 is further raised from this position, the movement restricting portion 722 of the guide groove 72 is brought into contact with the shaft portion 83 and the movement of the stay 7 is restricted, whereby the raising of the hood 61 is restricted. For this reason, when the upward rotation operation of the hood 61 is stopped, the third locking groove 75 is locked to the shaft portion 83, and the hood 61 is held in a fully opened state.

  During the opening / closing operation of the hood 61, the support portion of the gas spring 9 on the vehicle body 3 side moves upward on the virtual circle C <b> 2 centering on the support shaft P <b> 1 of the hood 61. Here, the virtual circle C2 is a concentric circle of the virtual circle C1, and the support portion on the opposite side of the vehicle body 3 of the gas spring 9 is supported by the stay support member 8, so that the gas spring 9 opens and closes the hood 61. During the operation, the movement between the stay support member 8 and the stay 7 is continued and the same movement as the stay 7 is performed. Therefore, the moving space of the gas spring 9 can also be reduced.

  On the other hand, when the hood 61 is closed, when the handle portion 76 is pushed up and the stay 7 is rotated upward, the holding of the hood 61 by the hood holding device 10 is released. In this state, if the hood 61 is lowered to a predetermined position with the handle portion 76 pushed up, the shaft portion 83 of the stay support member 8 is accommodated in the accommodating portion 721 of the guide groove 72, so that the locking grooves 73, 74, 75 are held. Is not locked to the shaft 83. Therefore, after that, if the hand is released from the stay 7 and the hood 61 is lowered, the hood 61 is closed.

  According to the hood holding device 10 as described above, the stay 7 is provided with the guide groove 72 extending toward the base end portion 71. While the portion 71 side is raised, the portion 71 is guided by the guide groove 72 and moves toward the proximal end portion 71. Therefore, the amount of movement of the stay 7 can be reduced by suppressing the amount of movement of the stay 7 in the horizontal direction. Further, since the stay 7 is provided with a plurality of locking grooves 73, 74, 75 on one side of the guide groove 72, the stay 7 moves to the base end 71 side with the opening operation of the hood 61. At this time, the locking grooves 73, 74, and 75 are sequentially locked to the shaft portion 83 of the stay support member 8 from the base end portion 71 side, and the hood 61 is held at a plurality of opening positions. Further, when the hood 61 is fully opened, the movement restricting portion 722 of the guide groove 72 is in contact with the shaft portion 83 of the stay supporting member 8 and restricts the movement of the stay 7. Is done.

It should be noted that the present invention is not limited to the above-described embodiments, and modifications, improvements, and the like within the scope that can achieve the object of the present invention are included in the present invention.
For example, in the said embodiment, although the hood holding | maintenance apparatus 10 hold | maintained the hood 61 which covers an engine, it is not restricted to this, You may make it hold | maintain the hood which covers apparatuses other than an engine with the hood holding | maintenance apparatus 10.

  In the above-described embodiment, the guide groove 72 is defined as being on the side of the locking grooves 73, 74, and 75 with respect to the second line L2 connecting the base end portion 71 and the end portion of the guide groove 72 on the base end portion 71 side. However, the guide groove 72 may be formed so as not to be inclined with respect to the second line L2.

  In the embodiment, the locking grooves 73, 74, and 75 are connected to the line along the inclination direction of the locking grooves 73, 74, and 75 and the line connecting the base end portion 71 and the locking grooves 73, 74, and 75. However, the present invention is not limited to this, but the angle between the engagement grooves 73, 74, and 75 located at a position distant from the base end portion 71 is increased. Each of the locking grooves 73, 74, 75 has an angle different from that of the above embodiment as long as the locking grooves 73, 74, 75 are locked to the shaft portion 83 of the stay support member 8 when the hood 61 is opened. For example, the locking grooves 73, 74, and 75 may be provided in parallel.

In the above embodiment, the stay support member 8 is provided with the stay contact portion 82 and the stay contact portion 82 is provided with the shaft portion 83. However, the main body portion 81 may be provided with the shaft portion 83 directly.
In the said embodiment, although the gas spring 9 was provided in the hood holding | maintenance apparatus 10, as an urging | biasing member, it is not restricted to this. In short, it is only necessary to prevent an operation force assist during the opening operation of the hood 61 and a sudden closing operation when the hood 61 is closed. For example, a torsion bar may be provided as an urging member instead of the gas spring 9.

  The present invention can be used for traveling machines such as construction machines (hydraulic excavators and the like) and industrial vehicles (forklifts and the like), as well as other machines having an openable hood.

  DESCRIPTION OF SYMBOLS 1 ... Hydraulic excavator (traveling machine), 3 ... Vehicle main body, 6 ... Engine, 7 ... Stay, 8 ... Stay support member, 9 ... Gas spring (biasing member), 10 ... Hood holding device, 61 ... Hood, 71 ... Base end 72, guide groove 73, 74, 75 ... first, second and third locking grooves (locking grooves), 83 ... shaft, θ1, θ2, θ3 ... angle, L1, first Line L2, second line.

Claims (4)

A hood holding device for holding an openable hood pivotally supported by a vehicle body of a traveling machine in an open state,
A stay whose base end is pivotally supported by the hood;
A stay support member provided in the vehicle main body and supporting the tip end side of the stay;
The stay support member includes a shaft portion extending in parallel with the support shaft of the hood,
The stay extends toward the base end portion and guides the shaft portion of the stay support member. The stay is continuously provided on one side of the guide groove with the guide groove. A plurality of locking grooves locked to the shaft portion ;
When the hood is closed, the base end portion is pivotally supported by the hood below a first line connecting the support shaft of the hood and the shaft portion of the stay support member. A hood holding device , wherein the hood is pivotally supported by the hood above the first line when the hood is fully opened . The hood holding device according to claim 1,
The locking groove is provided to be inclined toward the base end side with respect to the guide groove,
The angle formed by the line along the inclination direction of the locking groove and the line connecting the base end portion and the locking groove on the base end side is a locking groove at a position away from the base end portion. A hood holding device characterized by its large size. The hood holding device according to claim 1 or 2 ,
The guide groove starts from an end of the guide groove on the base end side with respect to a second line connecting the base end and the end of the guide groove on the base end side. A hood holding device that is inclined to the opposite side of the stop groove side. In the hood holding device according to any one of claims 1 to 3 ,
A biasing member for biasing the hood in the opening direction;
The stay, the stay support member, and the biasing member are each provided substantially in parallel,
The urging member is provided between the stay support member and the stay.

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