JPH09302718A - Bonnet supporting structure in construction working machinery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to install or remove a bonnet quickly and easily by reducing the number of parts for attaching the bonnet to the body of a working machine. SOLUTION: A bonnet covering the body of a work machine and its engine and so forth is supported through a hinge device in a freely opening/closing manner. And the hinge device comprises a support bracket 44 fixed to the machine body side, a hinge member 45 fixed to bonnet side, and a shaft pin 43 inserted to the hinge member 45 and the support bracket 44 thereby connecting them in a freely rotatable manner with the shaft pin 43 being freely movable in shaft direction for making the pin freely attachable and detachable with respect to the support bracket 44 and hinge member 45.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a bonnet support portion in a construction work machine such as a backhoe.

[0002]

2. Description of the Related Art In a backhoe, a bonnet for covering an engine, a radiator and the like is provided on a swing body of the backhoe, and a rear side portion of the bonnet is openably and closably supported by the swing body via a hinge device. (See, for example, Japanese Utility Model Laid-Open No. 6-29545).

The bonnet hinge device disclosed in the above publication will be described with reference to FIG. 10. The bracket 6 attached to the turning machine body 60 will be described.
1 is provided with a pair of left and right pivotal support pins 62, and a pair of left and right mounting members 64 attached to the bonnet 63 is formed with locking recesses 65 for the pivotal support pins 62, and a connecting pin 67 of a connecting member 66 is provided. A hole 68 for inserting is provided, and a hole 69 for inserting the pivot pin 62 is formed in the connecting member 66, and the connecting member is inserted in the engaging recess 65. The pivot pin 62 is inserted into the hole 69 of 66, the connecting pin 67 is inserted into the hole 68 of the mounting member 64, and the β pin 70 is attached to the pivot pin 62 to prevent the connecting member 66 from coming off. ing.

[0004]

According to the above-mentioned publication, the bracket 61 and the pivot pin 62 on the turning machine body 60 side, the mounting member 64 on the bonnet 63 side, and the pivot pin 62 and the mounting member 64 are provided. The number of parts is large because a connecting member 66 or the like for connecting and is required, and since the connecting member 66 and the β pin 70 are separate from the turning machine body or the bonnet, there is a problem such as loss of each part. is there.

The bonnet described above is a large component configured to cover the entire equipment such as an engine,
Since the bonnet 63, which is a large component, must be attached to and removed from the revolving machine body while being supported, the work of assembling the connecting member 66, the beta pin 70 and the like is troublesome and requires a long time. Therefore, in view of the above problems, the present invention provides a bonnet support structure for a construction work machine in which the number of parts for attaching the bonnet is reduced, and the bonnet can be quickly and easily attached and detached. To aim.

[0006]

The present invention takes the following technical means in order to achieve the above object. That is,
A bonnet support structure for a construction work machine in which a bonnet 11 that covers the engine 16 and the like is provided on the machine body 3 of the work machine 1, and one side of the bonnet 11 is supported on the machine body 3 side so as to be openable and closable via a hinge device 42. Hinge device 4
Reference numeral 2 denotes a support bracket 44 fixed to the machine body 3 side, a hinge member 45 fixed to the bonnet 11 side, and a support that rotatably connects the hinge member 45 and the support bracket 44 by inserting them. The support shaft pin 43 is supported by one of the hinge member 45 and the support bracket 44 so as to be insertable and removable with respect to the other so as to be retractable in the axial direction. It is characterized by that.

With such a structure, when connecting the support bracket 44 and the hinge member 45, the spindle pin supported by either the support bracket 44 or the hinge member 45 is inserted into and removed from the other. Only the connection between the support bracket and the hinge member, that is, the bonnet 1
1 can be easily attached to and removed from the machine body, and the structure is simple and the number of parts can be reduced. Further, since the constituent parts of the hinge device 42 are supported by either the bonnet 11 or the machine body 3, they are not lost.

Further, according to the present invention, the urging means 48 urges the support shaft pin 43 in a direction in which one of the hinge member 45 and the support bracket 44 is inserted into the other.
According to this, when the support bracket 44 and the hinge member 45 are connected by the support shaft pin 43, the support shaft pin 43 resists the urging means 48. Since it can be automatically inserted into and connected to either the support bracket 44 or the hinge member 45 by the urging means 48 after being retracted, the support bracket 44 and the hinge can be easily connected even with a simple structure. The member 45 can be connected and the connecting state can be maintained by the biasing means 48.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 3 shows a small backhoe 1 as a construction work machine, and this small backhoe 1 is mainly composed of a traveling device 2, a turning machine body 3, and a working device (excavation device) 4.

The running direction of the backhoe 1 shown by the arrow B in FIG. 4 will be referred to as the front-rear direction, and the lateral direction indicated by the arrow C orthogonal to the front-rear direction will be referred to as the left-right direction. Traveling device 2
As shown in FIGS. 3 to 5, a crawler type traveling device is employed which includes a pair of left and right crawler traveling bodies 5 each having a rubber crawler track, and these traveling bodies 5 are driven by a hydraulic motor M1. . The traveling device 2 is configured to connect and support the crawler traveling bodies 5 so as to be movable in the left-right direction, and to move the crawler traveling bodies 5 in the left-right direction by a hydraulic cylinder so that the interval between the left and right crawler traveling bodies 5 can be adjusted. . A dozer 6 is provided at the front of the traveling device 2.

As shown in FIGS. 3 to 5 and 7, the excavator 4 is fixed to the right front part inside the turning machine body 3 and is vertically projected from an opening 30 formed in the front surface of the turning machine body 3. A swing bracket 32 pivotally attached to the pair of support brackets 29 via a support shaft 31 so as to be pivotable left and right around the vertical axis, and a base portion is pivotally attached to the pivot bracket 32 so as to be pivotable about the left and right axes. A boom 34, and an arm 35 pivotally attached to the tip end side of the boom 34 so as to be swingable around the left and right axes,
A bucket 36 is attached to the tip of the arm 35 so as to be freely squeezed and dumped.

On the right side of the swing bracket 32, a piston rod 33a of a swing cylinder 33, which is arranged in the swivel body 3 below the radiator 17, is rotatably pivoted about a vertical axis. When the piston rod 33a of the cylinder 33 moves back and forth, the swing bracket 32
Is swung right and left around the support shaft 31. The boom 34
Is rocked by a boom cylinder 37 provided between the rocking bracket 32 and a midway portion of the boom 34,
The arm 35 is oscillated by an arm cylinder 38 provided between the midway portion of the boom 32 and the base portion of the arm 35, and the bucket 36 is provided between the base portion of the arm 35 and the attachment portion of the bucket 36. Bucket cylinder 39
It is designed to be operated by squeeze dump.

The revolving machine body 3 has a main body portion 8 rotatably supported around a vertical revolving axis A on a bearing body 7 provided in the central portion between the left and right crawler traveling bodies 5 of the traveling device 2. A counterweight 9 is provided at the rear of the main body 8 to balance the weight of the excavator 4 and the like attached to the front of the main body 8. The rear side of this swivel body 3 is
As shown in FIGS. 4 and 7, the circular locus circle formed by the rear surface of the fuselage is formed in an arc shape in a plan view with the substantial pivot axis A as the center, and the circular locus of the left and right crawler traveling bodies 5
When the lateral width of the traveling device 2 is maximized, the swivel body 3 is accommodated within the lateral width of the traveling device 2 from the lateral width of the traveling device 2.
Does not project outward. Further, the circle of the turning trajectory of the turning machine body 3 is contained within the front-rear length of the crawler traveling body. That is, the back hoe 1 is configured as a so-called small backward turning type, and the driver does not need to use nerves backward when performing work accompanied by turning, and can concentrate on the work.

The lateral width of the turning machine body 3 is narrower than the diameter of the turning trajectory circle drawn by the rear surface of the machine body, and the left and right side surfaces are formed in straight lines parallel to each other in a plan view. When the left and right width of the traveling body 5 is minimized, the left and right outer edges of the crawler traveling body 5 are positioned so as to substantially coincide with the left and right side surfaces of the turning machine body 3.

As shown in FIGS. 6 and 7, between the main body 8 and the weight 9 at the rear portion of the upper surface of the swivel body 3, there is an upward opening, and the opening 10 is closed by a bonnet 11. Further, the inside of the main body 8 is hollow so that devices can be housed therein. On the left side of the front part of the swivel body 3,
A steering box 12 equipped with levers and pedals for operating hydraulic equipment provided on the traveling device 2, the turning machine body 3, the excavation device 4, etc. is provided, and each hydraulic equipment is provided below the steering box 12 inside the turning machine body 3. A control valve 13 for controlling the is arranged. Further, a driver's seat 14 is provided on the hood 11 behind the control box 12, and a place where the driver's seat 14 on the upper surface of the bonnet 11 is provided is a recessed portion 15 recessed from the upper side for stability. ing. Further, the control box 12 and the bonnet 11 are arranged at a front and rear with a space therebetween, and a space between the control box 12 and the bonnet 11 is a passage space, and the upper surface of the main body portion 8 corresponding to the passage space is Horizontally flat step part 8A
It has been. In the control box 12, the driver's seat 1
A handrail 54 that can be used when getting on and off the vehicle 4 is attached, and columns of a shade 55 are detachably attached to the left and right side surfaces of the weight 9.

The handrail 54 is formed in a substantially gate shape in the front view shown in FIG. 5, and the left side of the handrail 54 projects leftward from the operation box 12 and is fixed to the upper and lower intermediate portions of the operation box 12. The right side of the handrail 54 extends downward in front of the operation box 12 and is fixed to the lower side of the operation box 12. Further, the right side of the handrail 54 is arranged to the left of the boom 34 of the excavator 4. Therefore, the boom 34 does not interfere with the handrail 54 even when the boom 34 is swung up and down (back and forth), and the handrail 54 is prevented from being damaged.

In the bonnet 11, as shown in FIGS. 6 and 7, an engine 16, a radiator 17, a hydraulic pump 18 driven by the engine 16, an engine 16
Tank 19 for oil, hydraulic oil tank 20 for each hydraulic equipment
Etc. are accommodated. The engine 16 is horizontally arranged in the center of the turning machine body 3 in the left-right direction.
The crank shaft center D of is substantially aligned with the left-right direction of the turning machine body 3. A radiator 17 is arranged on the right side of the engine 16, and a hydraulic pump 18 is arranged and fixed on the left side of the engine 16. The hydraulic pump 18 is driven by an output shaft of the engine 16. .
A muffler 21 is arranged in the front-rear direction above the hydraulic pump 18, a fuel tank 19 formed in the front-rear direction is arranged below the hydraulic pump 18, and a hydraulic oil tank 20 is arranged on the lower rear side of the engine 16. It is arranged.

The hydraulic oil tank 20 is integrally formed by recessing the weight 9 from the upper side, and is formed laterally long in the left-right direction.
A lid 20a that closes the upper end opening is bolted, and an auxiliary tank 22 is provided on the left side of the lid 20a. A battery 23 is arranged and fixed on the left side of the auxiliary tank 22 and substantially in the center of the weight 9 on the left and right sides.

As described above, the excavator 4 is installed in the swing body 3
While the fuel tank 19 is arranged on the left side of the rear part of the turning machine body 3 and the hydraulic oil tank 20 is arranged on the rear part of the turning machine body 3 in the left-right direction, Good weight balance between front and rear. The air cleaner 2 is provided at the upper right rear of the engine 16.
4 are arranged in the left-right direction, and the intake hose 25 of the air cleaner 24 is extended from the air cleaner 24 to the front side of the engine 16 while bypassing the left side of the upper part of the engine 16 and to the front side of the upper part of the engine 16 to the right. The radiator 17 extends toward the front side of the radiator 17 and extends downward to the lower side of the radiator 17.

As shown in FIGS. 4 and 7, the radiator 17 is formed on the right side surface of the bonnet 11.
A fan 26, which is arranged to face an exhaust port 27 composed of a large number of holes and which is rotatably driven by the engine 16, is mounted on the right side of the engine 16, and a cooling wind generated by the fan 26 is provided. Is blown to the right, that is, toward the radiator 17, and is discharged from the air outlet 27 through the core of the radiator 17.

Further, the lower surface of the revolving machine body 3 on the lower side of the radiator 17 is formed as an opening and serves as an inlet for cooling air, and the intake to the air cleaner 24 is also performed from this inlet. In the side view shown in FIGS. 3 and 6,
The main body portion 8 and the weight 9 of the swivel body 3 are formed such that at the boundary portion (the step portion 8A and the upper surface of the front end of the weight 9), the both are substantially at the same height and the upper surfaces are substantially flush with each other.
The upper and right side wall upper surfaces of the weight 9 are formed in an inclined portion 9A that inclines rearward and obliquely upward from this boundary portion, and the upper surface of the weight rear portion from the inclined portion 9A to the rear is also a step portion 8A on the upper surface of the main body portion 8. The receiving portion 9B is formed to be substantially parallel at a high position.

The lower edge of the bonnet 11 can be mounted so as to have a shape suitable for the step portion 8A, the inclined portion 9A of the weight 9 and the receiving portion B. The bonnet 11 is made of a sheet metal press, a resin or the like, and its lower rear portion is pivotally attached to the weight 9 via a hinge device 42 so as to be rotatable about a spindle pin 43 in the left-right direction so that it can be opened and closed. When the bonnet 11 is closed,
When the engine 16 and the engine auxiliary equipment (radiator, battery, etc.) are entirely covered and opened, the engine 16 is rotated rearward as shown by a phantom line in FIG.
It is formed in such a size that the entire surface of the hood can be opened and the inside of the bonnet 11 can be inspected.

As shown in FIGS. 1, 2 and 6 and 7, the hinge device 42 includes a lid 2 for the hydraulic oil tank 20.
Support bracket 44 fixed on 0a, a pair of left and right hinge members 45 fixed to the lower rear inner side surface of the bonnet 11, and a spindle pin 43 for rotatably connecting the hinge member 45 and the support bracket 44. It consists of The support bracket 44 is formed in a substantially U shape facing upward in the rear view shown in FIG. 1, and a lower wall 44b thereof is attached to the weight 9 by a bolt 20b for fixing the lid 20a to the weight 9. It is fixed together.
Further, an intermediate standing wall 44M is provided upright in the middle of the support bracket 44 between the left and right standing walls 44L and 44R.

Left and right standing walls 44 of the support bracket 44
Each of the L and 44R and the intermediate standing wall 44M is formed with a hole 44a penetrating in the left-right direction, and the right support shaft pin 43R shortly formed in the hole 44a formed in one of the left and right (right in the figure) standing wall 44R. The vertical wall 44R
The right outer shaft pin 43R is fixed by welding or the like so that the outer shaft end portion of the right support shaft pin 43R projects to the right outer side of the right outer surface. The left support shaft pin 43L formed longer than the right support shaft pin 43R is axially slidably left in the hole 44a formed in the left and right standing walls 44L and the middle standing wall 44M.
It is inserted so as to bridge the intermediate standing walls 44L and 44M.

A collar piece 43a is provided at a midway portion in the longitudinal direction of the left support shaft pin 43L, and an urging means 48 composed of a compression coil spring is interposed between the collar piece 43a and the intermediate standing wall 44M. The left shaft pin 43L is urged in the direction in which the outer end of the shaft 43L projects from the left outer side of the left standing wall 44L. Further, the left support shaft pin 43L is formed with a restricting piece 43b that restricts the amount of protrusion from the left standing wall 44L.
The amount of protrusion of the right support shaft pin 43R from the right upright wall 44R and the left upright wall 44 of the left support shaft pin 43L by the restriction piece 43b.
Positioning is performed so that the protrusion amounts from L are substantially the same. Then, when the left support shaft pin 43L is moved rightward in the axial direction against the biasing means 48, the outer end portion of the pin 43L retracts inward from the outer surface of the left standing wall 44L. Is configured to.

In the side view of FIG. 2, the pair of left and right hinge members 45 are formed in a substantially U shape with the rear side opened when the bonnet 11 is closed, and one end thereof is welded to the bonnet 11 or the like. And a connection hole 45a into which the left and right support shaft pins 43L and 43R can be inserted is formed at the other end. Then, as shown in FIG. 1, the left and right hinge members 45 are arranged such that the distance between the facing side surfaces is substantially the same as the left and right width of the support bracket 44.

With the above construction, when the bonnet 11 is attached to the swivel body 3 (weight 9), that is, when the hinge members 45 are connected to the left and right support shaft pins 43L and 43R provided on the support bracket 44, Left spindle pin 4
3L is moved inward to the left and right (rightward) against the biasing means 48 and retracted inward from the outer surface of the left standing wall 44L, and the right support shaft pin 43R is moved to the corresponding right hinge. Member 4
It is inserted into the connection hole 45a of 5R. And the left standing wall 44L
The hole 44a formed on the left side of the hinge member 45L and the connecting hole 45a formed on the left side hinge member 45L are aligned with each other to release the left support shaft pin 43L (the biasing means 48 automatically causes the left standing wall 44 to rise).
By projecting it from the outer side surface of L), the left support shaft pin 43L is inserted into the connection hole 45a of the left hinge member 45L, and the connection is completed. When the connection between the support bracket 44 and the hinge member 45 is released, the reverse operation is performed.

That is, the bonnet 11 can be easily attached by simply retracting the left support shaft pin 43L in the axial direction.
It can be removed, and the biasing means 48 can surely maintain the state in which the pin 43L is inserted into the connecting hole 45a of the left hinge member 45L. Further, not only the number of parts is small, but all the constituent members of the hinge device 42 are provided for the weight 9 or the bonnet 11, so that the parts are prevented from being lost.

It is preferable to provide a manual lever or the like on the left support shaft pin 43L in order to facilitate the operation of moving the left support shaft pin 43L in and out. Further, the hinge member 45 is formed in a substantially U shape in a side view as described above, and the recess 49 of the hinge member 45 is formed when the hinge member 45 is rotated about the support shaft pin 43 as a fulcrum. It is formed so as to avoid the upper edge portion of the weight 9, and a tapered surface 9C is formed on the upper surface of the rear portion of the weight 9 in order to avoid interference with the lower edge of the bonnet 11. Then, when the bonnet 11 is fully opened, the inside surface of the rear wall of the weight 9 (bearing surface)
50 and one side surface (supported surface) 49a of the recess 49 of the hinge member 45 are in contact with each other, and the fully open state of the bonnet 11 is held by the support surface 50. Therefore, a method of maintaining the open state of the bonnet 11 that has been generally used in the past, for example, the bonnet 1
It is not necessary to provide support rods, wires, air cylinders, or the like between the 1 and the revolving machine body 3, and it is not necessary to secure a space for installing them, so that the space in the bonnet 11 can be saved.

When the bonnet 11 is closed, the step portion 8A of the main body portion 8 and the inclined portion 9A of the weight 9 are
The receiving portion 9B and the lower edge of the bonnet 11 that fits the receiving portion 9B can stably maintain the closed state without rattling. In addition, as shown in FIG.
5 is formed in a vertically oriented flat plate shape, the battery 23 on the lid 20a is arranged between the left and right hinge members 45, and the left hinge member 45 is arranged in the gap between the battery 23 and the auxiliary tank 22. Since the hinge member 45 is used, the space in the bonnet 11 is not damaged and the space is effectively used. Further, since the hinge device 42 is housed in the bonnet 11 and the weight 9 and is not exposed to the outside, it is possible to reduce the gap between the main body 8 and the weight 9 when the bonnet 11 is closed. Has become.

The bearing surface 50 of the weight 9 is provided with an elastic plate 51 made of rubber or the like for cushioning the shock of contact with the supported surface 49a of the hinge member 45. Further, an elastic material 5 such as rubber is provided around the entire lower edge of the bonnet 11.
2 is provided to prevent water from entering and leaking noise when the bonnet 11 is closed, as well as to prevent a shock when the bonnet 11 is closed and to prevent peeling of the paint.

In the above structure, the left and right support shaft pins 43
Although one (left) of L and 43R is supported by the support bracket 44 so that it can be inserted into and removed from the hinge member 45, both support shaft pins may be inserted into and removed from it. It is also possible to provide the support shaft pin 43 on the hinge member 45 side. And
Instead of providing the urging means 48 for the support shaft pin 43, a stopper or the like for positioning the support shaft pin 43 in the protruding state and the retracted state may be separately provided.

FIG. 8 shows the details of the swing bracket 32 portion of the excavator 32. The swing bracket 32 corresponds to the pair of upper and lower support brackets 29 as shown in FIG. 8 (a). And the upper and lower bifurcated pivot 32
a is formed, and each of them is pivotally connected to the support bracket 29 by a support shaft 31 which is separate from the upper and lower sides. Further, as shown in FIG. 8B, the boom 34 of the excavator 4 is
Has a substantially hollow box shape and has a pair of left and right pivotal connecting plates 34a at its lower end. The lower end of each of the left and right pivotal connecting plates 34a has a left and right bifurcated shape at the front end of the swing bracket 32. Left and right separate support shafts 4 for each of the pivot portions 32b.
Centralized by 0.

A hydraulic pipe for supplying hydraulic oil to the boom cylinder 37, the arm cylinder 38, and the bucket cylinder 39 is provided between the upper and lower pivotally supporting portions 32a and between the left and right pivotally supporting portions 32b of the swing bracket 32. P is inserted and disposed inside the hollow of the boom 34,
As described above, the left and right pivotal support portions 32 of the swing bracket 32 are
By connecting b and the left and right pivot plates 34a of the boom 34 by separate left and right support shafts 40, a sufficient piping passage for the hydraulic pipe P can be secured without the support shaft 40 interfering with the piping. You can do it.

FIG. 9 shows the boom 3 of the excavator 4.
4 shows the connecting portion between the arm 4 and the arm 35, and the boom 34
A pair of left and right support plates 34a are provided at the distal end of the arm 35, and a pair of left and right pivot plates 35a are provided at the base end side of the arm 35. The left and right support plates 34a and the left and right pivot plates 35 are provided.
a is pivotally connected to the left and right by separate support shafts 41. As a result, the hydraulic pipe P arranged in the hollow of the boom 34 as described above is connected to the bucket cylinder 39 by passing between the left and right support plates 34a and between the left and right pivot plates 35a on the tip side of the boom 34. However, by connecting the support plate 34a and the pivot plate 35a by the separate support shafts 41 on the left and right sides in this way, the support shafts 41 can be connected to the pipe passage of the hydraulic pipe P without interfering with the support shafts. We are able to secure enough.

The present invention is not limited to the above-described embodiment, and the design can be changed appropriately.

[0037]

As described above in detail, according to the present invention, a bonnet for covering an engine or the like is provided on the machine body of a working machine, and one side of the bonnet is supported on the machine body side so as to be openable and closable via a hinge device. In a bonnet support structure for a construction work machine, the hinge device rotates a support bracket fixed to the machine body, a hinge member fixed to the bonnet side, and the hinge member and the support bracket by inserting the hinge bracket into the support bracket. And a support shaft pin that is freely connected, and the support shaft pin is supported by one of the hinge member and the support bracket so as to be able to move in and out in the axial direction so that the support shaft pin can be inserted into and removed from the other. Therefore, by simply inserting / removing the support shaft pin supported by either the support bracket or the hinge member with respect to the other, connection / disconnection of the support bracket and the hinge member, that is, a bond is performed. Tsu attached to the door of the aircraft, removal becomes what can be easily, also structure also enables the simple and the number of parts down. Further, since the constituent parts of the hinge device are supported by either the bonnet or the machine body, the parts are not lost (claim 1).

Further, according to the present invention, since the support shaft pin is supported by one of the hinge member and the support bracket through a biasing means for biasing the support pin in the direction of insertion into the other, With a simple structure, the bonnet can be attached and detached more easily (claim 2).

[Brief description of drawings]

FIG. 1 is a rear view of a hinge device according to an embodiment of the present invention.

FIG. 2 is a side view of the hinge device.

FIG. 3 is an overall side view of a backhoe.

FIG. 4 is a plan view of a backhoe.

FIG. 5 is a front view of a backhoe.

FIG. 6 is a right side view of the turning machine body.

FIG. 7 is a plan view of a turning machine body.

FIG. 8 shows a swing bracket portion of the excavator, (a)
Is a side sectional view and (b) is a plan view.

9A and 9B show a connecting portion of a boom and an arm of an excavator, wherein FIG. 9A is a side view and FIG. 9B is a plan view.

FIG. 10 is an exploded perspective view showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Backhoe 3 Revolving machine body 11 Bonnet 42 Hinge device 43 Spindle pin 44 Support bracket 45 Hinge member 48 Energizing means

Claims (2)

[Claims] 1. A bonnet (11) for covering an engine (16) and the like is provided on a body (3) of a working machine (1), and one side of the bonnet (11) is hinged to a body (3) side.
In a bonnet support structure for a construction work machine which is openably and closably supported via 2), the hinge device (42) includes a support bracket (44) fixed to the machine body (3) side and a bonnet (11) side fixed. Hinge member (45) and the hinge member (45)
And a support bracket (44) so as to rotatably connect them to each other. The support shaft pin (43) includes a hinge member (45) and a support bracket (44). ), And a bonnet support structure for a construction work machine, wherein the bonnet support structure is supported so that it can be inserted and removed with respect to the other in the axial direction. 2. The urging means (4) for urging the support shaft pin (43) to one of the hinge member (45) and the support bracket (44) in a direction of being inserted into the other.
8. It is supported via 8).
The bonnet support structure for the construction work machine described in.