Device for opening and closing the engine hood of a construction machine

Abstract

An apparatus for opening and closing an engine hood for a construction machine is disclosed that can open an engine hood at an angle desired by an operator. The apparatus for opening and closing an engine hood includes a frame having one side fixed to an upper swing structure and the other side fixed to a cowl frame, a guide rail having a guide groove formed in a length direction and a plurality of seat portions formed to be cut so as to communicate in a downward direction with respect to the guide groove and maintaining an opening angle that is set to open the engine hood in multiple stages, and a stay rod having a free end slidably formed along the guide rail and a fixed end rotatably fixed to the engine hood.

Claims

1. An apparatus for opening and closing an engine hood for a construction machine, in which an engine room is mounted on an upper swing structure and the engine hood is mounted on a cowl frame that forms the engine room to be opened and closed through a gas spring, comprising: a frame having a first side fixed to the upper swing structure and a second side fixed to the cowl frame; a stay rod having a free end slidably positioned along a guide rail, and a fixed end rotatably fixed to the engine hood; the guide rail fixed to one of the first side or the second side, and having a guide groove formed in a length direction and a plurality of seat portions downwardly formed to be separately situated in the guide groove so as to communicate with the guide groove, thus maintaining the stay rod in a predetermined opening angle that is to be adjusted with the plurality of seat portions, separately; the plurality of seat portions formed on the guide rail include: a first seat portion on which the free end of the stay rod is seated to maintain the engine hood at a first predetermined opening angle; and a second seat portion on which the free end of the stay rod is seated to maintain the engine hood at a second predetermined opening angle, the second seat portion is formed apart from the first seat portion; the first seat portion and the second seat portion extend from a first side of the guide groove which is opposite to a second side of the guide groove, the first side of the guide groove is further from the engine hood than the second side of the guide groove; the guide groove formed on the guide rail includes: a first sliding surface extending in a first plane from an end of the guide groove to the first seat portion, the engine hood being closed at a location where the stay rod is positioned on the end of the guide groove; a second sliding surface extending in a second plane between the first seat portion and the second seat portion, the second plane is closer to the second side of the guide groove than the first plane; and a third sliding surface extending in a third plane from the second seat groove to a second end of the guide groove, the engine hood being opened at a location where the stay rod is positioned on the second end of the guide groove at a predetermined maximum angle, and the third plane is closer to the second side of the guide groove than each of the first plane and the second plane.

2. The apparatus according to claim 1, wherein the first set opening angle of the engine hood maintains an angle of 45 degrees when the free end of the stay rod is seated on the first seat portion, and the second set opening angle of the engine hood maintains an angle of 60 degrees when the free end of the stay rod is seated on the second seat portion.

3. The apparatus according to claim 1, further comprising projections formed to project from boundary portions of a sliding surface of the guide groove, respectively.

4. The apparatus according to claim 1, wherein a setting hole is formed upwardly with respect to a surface of the guide groove.

5. An apparatus for opening and closing an engine hood for a construction machine having an engine room mounted on an upper swing structure, the engine hood is mounted on a cowl frame that forms the engine room and is moved to an open position with a gas spring, the apparatus comprising: a frame having a first side fixed to the upper swing structure, and a second side fixed to the cowl frame; a guide rail fixed to the frame a guide groove defined by the guide rail, the guide groove extends between a first end and a second end, the first end is distal to a hinge point of the engine hood and the second end is proximate to the hinge point of the engine hood; a first seat portion and a second seat portion, each one of which is defined by the guide rail to extend from a first side of the guide groove at an angle extending away from the first end of the guide groove, the first seat portion is closer to the first end than the second seat portion, the first side is opposite to a second side of the guide groove, the first side is further from the engine hood than the second side; a first sliding surface of the guide groove extends in a first plane between the first end of the guide groove and the first seat portion; a second sliding surface of the guide groove extends in a second plane between the first seat portion and the second seat portion, the second plane is closer to the second side of the guide groove than the first plane; a third sliding surface of the guide groove extends in a third plane between the second seat portion and the second end of the guide groove, the third plane is closer to the second side of the guide groove than each of the first plane and the second plane; and a stay rod having a fixed end secured to the engine hood and a second end slidably movable along the guide rail; wherein: the second end of the stay rod is seated on the first sliding surface when the engine hood is closed; the second end of the stay rod is seated within the first seat portion to support the engine hood open at a first angle; the second end of the stay rod is seated within the second seat portion to support the engine hood open at a second angle that is greater than the first angle; and the second end of the stay rod is seated on the third sliding surface when the engine hood is opened at a maximum angle.

6. The apparatus of claim 5, wherein the first angle is 45 degrees and the second angle is 60 degrees.

7. The apparatus of claim 5, further comprising a setting hole defined by the guide rail and extending from the second side of the guide groove towards the first end of the guide rail.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) The above objects, other features and advantages of the present invention will become more apparent by describing the preferred embodiments thereof with reference to the accompanying drawings, in which:

(2) FIG. 1 is a view illustrating a use state of an apparatus for opening and closing an engine hood for a construction machine according to an embodiment of the present invention;

(3) FIG. 2 is a view illustrating a main portion of an apparatus for opening and closing an engine hood for a construction machine according to an embodiment of the present invention; and

(4) FIGS. 3A and 3B are views illustrating modified examples of a frame on which a stay rod slides in an apparatus for opening and closing an engine hood for a construction machine according to an embodiment of the present invention

DESCRIPTION OF REFERENCE NUMERALS IN THE DRAWING

(5) 10: cowl frame 11: frame 12: guide groove 13: gas spring 14: engine hood 15: seat portion 16: guide rail 17: stay rod 18: first seat portion 19: second seat portion 20: start end 21, 22: opening 23, 24: projection 25: first sliding surface 26: second sliding surface 27: third sliding surface 28: end 29: guide roller 30: Setting hole

BEST MODE

(6) Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The matters defined in the description, such as the detailed construction and elements, are nothing but specific details provided to assist those of ordinary skill in the art in a comprehensive understanding of the invention, and the present invention is not limited to the embodiments disclosed hereinafter.

(7) According to an embodiment of the present invention as illustrated in FIGS. 1 to 3B, an apparatus for opening and closing an engine hood for a construction machine, in which an engine room is mounted on an upper swing structure and an engine hood is mounted on a cowl frame that forms the engine room to be opened and closed through a gas spring, includes a frame 11 having one side fixed to the upper swing structure (not illustrated) and the other side fixed to the cowl frame 10; a guide rail 16 fixed by welding to one side surface of the frame 11, and having a guide groove 12 formed in a length direction and a plurality of seat portions 15 formed to be cut so as to communicate in a downward direction with respect to the guide groove 12 and maintaining an opening angle that is set to open the engine hood 14 in multiple stages during driving of the gas spring 13; and a stay rod 17 having a free end slidably formed along the guide rail 16 and a fixed end rotatably fixed to the engine hood 14 and maintaining the opening angle of the engine hood 14 according to the driving of the gas spring 13.

(8) The seat portion 15 formed on the guide rail 16 includes a first seat portion 18 on which the free end of the stay rod 17 that slides along the guide groove 12 through the driving of the gas spring 13 is seated to maintain the engine hood 14 at a first set opening angle; and a second seat portion 19 which is formed on the guide rail 16 toward the first seat portion 18 (the side near to a working device such as a boom) and on which the free end of the stay rod 17 that slides along the guide groove 12 through the driving of the gas spring 13 is seated to maintain the engine hood 14 at a second set opening angle.

(9) The first set opening angle of the engine hood 14 maintains an angle of 45 degrees when the free end of the stay rod 17 is seated on the first seat portion 18, and the second set opening angle of the engine hood 14 maintains an angle of 60 degrees when the free end of the stay rod 17 is seated on the second seat portion 19.

(10) As shown in FIG. 3A, the apparatus for opening and closing an engine hood according to an embodiment of the present invention further includes openings 21 and 22 of the first and second seat portions 18 and 19 on a side that withdraws from a start end 20 of the guide groove 12 in which the free end of the stay rod 17 is positioned when the engine hood 14 is closed, and projections 23 and 24 formed to project from boundary portions of a sliding surface of the guide groove 12, respectively.

(11) Through this, if the engine hood 14 is opened by the driving of the gas spring 13, a guide roller 29 of the stay rod 17, which slides along the guide groove 12, may be interfered with the projection 23 to be seated on the first seat portion 18, and may be interfered with the projection 24 to be seated on the second seat portion 19.

(12) As shown in FIG. 3B, the guide groove 12 formed on the guide rail 16 includes a first sliding surface 25 continued from a start end 20 of the guide groove 12 in which the free end of the stay rod 17 is positioned to the first seat portion 18 when the engine hood 14 is closed; a second sliding surface 26 formed between openings 21 and 22 of the first and second seat portions 18 and 19 with a height that is relatively higher than a height of the first sliding surface 25; and a third sliding surface 27 formed between an end 28 of the guide groove 12 in which the free end of the stay rod 17 is positioned and the openings 21 and 22 of the second seat portion 19 with a height that is relatively higher than the height of the second sliding surface 26 when the engine hood 14 is opened at a set maximum angle.

(13) Through this, if the engine hood 14 is opened by the driving of the gas spring 13, the guide roller 29 of the stay rod 17 slides along the first sliding surface 25, and is interfered with the second sliding surface 26 to be seated on the first seat portion 18. Further, the guide roller 29 slides along the second sliding surface 26, and is interfered with the third sliding surface 27 to be seated on the second seat portion 19.

(14) A circular setting hole 30 is provided which is formed to be cut so as to communicate in an upward direction with respect to the guide groove 12 and secures a space in which the guide roller 29 that makes the free end of the stay rod 17 smoothly slide along the guide groove 12 can be easily coupled to the free end of the stay rod 17.

(15) In the drawing, the unexplained reference numeral 40 is a bracket that supports the frame 11 on the upper swing structure.

(16) Hereinafter, a use example of the apparatus for opening and closing an engine hood for a construction machine according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

(17) Referring to FIGS. 1 and 2, if the engine hood 14 is opened to perform checking, repairing, or replacement of the engine, the hydraulic pump, or the various kinds of control valves MCV, which are installed in the engine room, the operator operates an operation lever (not illustrated) to drive the gas spring 13, and the engine hood 14 is opened in multiple stages (e.g., at angles of 45 degrees and 60 degrees) about a hinge shaft (not illustrated) mounted on the cowl frame 10 as a center shaft.

(18) In this case, as shown in FIGS. 2, 3A, and 3B, if the operator drives the gas spring 13 to open the engine hood 14, the guide roller 29, which is mounted at the free end of the stay rod 17 that is positioned at the start end 20 of the guide groove 12 (the engine hood 14 is in a closed state), slides along the guide groove 12 in the left direction in the drawing.

(19) In this case, while the guide roller 29 slides along the guide groove 12, an external force is applied to the stay rod 17 in the axis direction due to the force of the gas spring 13 and the self-weight of the engine hood 14, and thus the guide roller 29 is seated on the first seat portion 18 through the opening 21 that is formed to be cut so as to communicate in the downward direction with respect to the guide groove 12.

(20) Accordingly, the engine hood 14 is automatically opened at a set angle of 45 degrees according to the driving of the gas spring 13. Accordingly, in a state where the engine hood 14 is opened at the angle of 45 degrees, the operator can perform checking or repairing of the corresponding component mounted in a position adjacent to the opening of the engine room.

(21) On the other hand, if the operator opens the engine hood 14 at the set angle of 60 degrees to perform checking or repairing of the various kinds of control valves (e.g., MCV) that are installed in a deep position inside the engine room, the operator lifts the guide roller 29 of the stay rod 17 that is positioned on the first seat portion 18 from the first seat portion 18 through the opening 21 to make the guide roller 29 secede from the first seat portion 18.

(22) In this case, by the driving of the gas spring 13, the guide roller 29 slides along the guide groove 12 in the left direction in the drawing. At this time, since the external force is applied to the stay rod 17 in the axis direction due to the force of the gas spring 13 and the self-weight of the engine hood 14, the guide roller 29 is seated on the second seat portion 19 through the opening 22 that is formed to be cut so as to communicate in the downward direction with respect to the guide groove 12.

(23) Accordingly, the engine hood 14 is automatically opened at the set angle of 60 degrees according to the driving of the gas spring 13. Accordingly, in a state where the engine hood 14 is opened at the angle of 60 degrees, the operator can perform checking or repairing of the various kinds of control valves that is installed in the deep position inside the engine room.

(24) On the other hand, if the operator lifts the guide roller 29 from the second seat portion 19 through the opening 22 to make the guide roller 29 secede from the second seat portion 19, the guide roller 29 slides in the left direction in the drawing through the gas spring 13 and is positioned at the end 28 of the guide groove 12. That is, the engine hood 14 can be opened at the maximum angle (e.g., the angle of 80 degrees) by the driving of the gas spring 13.

(25) As described above, the engine hood 14 can be opened selectively at the angle of 45 degrees or 60 degrees through the driving of the gas spring 13 according to the kinds of work to check and repair the components installed inside the engine room of the small excavator. Accordingly, it is unnecessary for the operator to go up the excavator through the track for traveling or the like in order to close the engine hood 14 after the checking or repairing of the component in the engine room is completed in a state where the engine hood 14 (especially the engine hood of the small excavator) is opened at the maximum angle.

(26) On the other hand, since the circular setting hole 30 is formed to be cut so as to communicate in the upward direction with respect to the guide groove 12, workability can be improved in coupling the guide roller 29 to the free end of the stay rod 17 or separating the guide roller 29 from the free end of the stay rod 17.

(27) On the other hand, by making the guide roller 29 that is mounted on the lower end portion of the stay rod 17 secede from the second seat portion 19 after the checking or repairing of the corresponding component in the engine room is completed, the guide roller 29 slides along the guide groove 12 in the right direction in the drawing through the gas spring 13. That is, since the guide roller 29 moves along the guide groove 12 and is positioned at the start end 20 of the guide groove 12, the engine hood 14 can be closed with respect to the cowl frame 10.

INDUSTRIAL APPLICABILITY

(28) As apparent from the above description, according to the apparatus for opening and closing an engine hood for a construction machine according to an embodiment of the present invention, the engine hood can be opened at the angle desired by the operator during checking the various components, such as the hydraulic pump, accommodated in the engine room of the small excavator or the like. Accordingly, the engine hood is prevented from being opened at the maximum angle against the operator's intention, and thus it is unnecessary for the operator to go up the excavator in order to close the engine hood.