JP7150665B2 - work machine - Google Patents

Description

The present invention relates to a working machine such as a backhoe.

BACKGROUND ART Conventionally, a working machine disclosed in Patent Document 1 is known.
The work machine disclosed in Patent Document 1 is equipped with a cabin as a driver protection structure that protects the driver's seat in the machine body.

JP 2017-137651 A

In conventional work machines, the cabin alone bears the necessary strength as a driver protection structure. For this reason, for example, if the weight of the machine increases due to minor changes, etc., it will be necessary to develop a new cabin or add additional reinforcement to the cabin in order to meet the strength required as a driver protection structure. Also, there is a problem that a large number of man-hours are required for quality assurance.
SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to meet the required strength required for a driver protection structure without changing the driver protection structure.

A work machine according to an aspect of the present invention includes a machine body, a driver's seat mounted on the machine body, and a driver protection structure for protecting the driver's seat, wherein a driver protection structure that is biased toward the rear part and formed at a position higher than the position of the front lower part; a support frame that is disposed on the rear side of the driver protection structure; a reinforcing structural part for reinforcing a driver protection structure, wherein the support frame is arranged on the other side of the driver protection structure in the width direction of the vehicle body and has a lower portion attached to the vehicle body. a leg, a second leg spaced from the first leg on one side in the width direction of the fuselage and having a lower portion attached to the fuselage, and an upper portion of the first leg and a support portion provided over the upper portion of the second leg portion and on which the rear portion of the driver protection structure is placed and supported, wherein the first leg portion has a vertically elongated plate-like front portion. a face plate, and a side plate extending rearward from an end of the front plate on one side in the width direction of the machine body and having an end of the support portion on the other side in the width direction of the machine body fixed to an upper part thereof. and the reinforcing structure part is provided on the body side with a gap between it and the driver protection structure, and contacts the driver protection structure when the driver protection structure deforms to prevent the deformation. A lower part fixed above and in front of the part to which the end of the support part is fixed in the side plate, and a lower part extending upward from the lower part and above the first leg and an upper portion protruding into.

According to the above configuration, when the driver protection structure is deformed, deformation of the driver protection structure can be suppressed by abutting the driver protection structure against the reinforcing structural component. That is, without directly reinforcing the driver protection structure, the strength of the driver protection structure when deformed can be improved by the reinforcement structural component. In addition, since the reinforcing structure part has a gap with the driver protection structure when the driver protection structure is not deformed, the driver protection structure does not come into contact with the reinforcement structure part during work or running. can be prevented, and the occurrence of stress concentration due to contact of the driver protection structure with the reinforcing structure component can be prevented.

It is a right view of a working machine. It is a top view of a working machine. 1 is a perspective view of a fuselage; FIG. It is a left view which shows the support structure of a cabin. It is a right side view of a cabin and a support frame. FIG. 4 is a perspective view of a support frame; 4 is a perspective view of the main parts of the support frame; FIG. FIG. 4 is a front view showing the relationship between the reinforcing structural component and the cabin; FIG. 4 is a plan view showing the relationship between the reinforcing structural component and the cabin; FIG. 4 is a side view of the reinforcing structural component as seen from the cabin side; FIG. 10 is a side view of the reinforcing structural component from the side opposite the cabin;

An embodiment of the present invention will be described below with appropriate reference to the drawings.
FIG. 1 is a schematic side view showing the overall configuration of a working machine 1 according to this embodiment. FIG. 2 is a plan view of the working machine 1. FIG. In this embodiment, a backhoe, which is a turning work machine, is exemplified as the work machine 1 .
As shown in FIG. 1 , the working machine 1 includes a machine body (swivel base) 2 , a traveling device 3 , and a front working device 4 . The airframe 2 is equipped with a cabin 5 as a driver protection structure for protecting a driver's seat 6. - 特許庁In this embodiment, the cabin 5 is configured to meet the required strength required by the ROPS (Roll-Over Protective Structure) standard together with a reinforcing structural component 58, which will be described later. The driver's seat 6 is a component on which an operator (driver) sits, and is provided inside the cabin 5 .

The driver protection structure is not limited to the cabin, and may be a canopy having a frame structure such as a two-post, three-post, or four-post structure.
In this embodiment, the front direction of the operator seated in the driver's seat 6 of the work machine 1 (arrow A1 direction in FIGS. 1 and 2) is forward, and the rear direction of the operator (arrow A2 direction in FIGS. 1 and 2) is forward. The direction to the left of the operator (direction B1 in FIG. 2) is to the left, and the direction to the right of the operator (direction B2 in FIG. 2) is to the right. Also, the horizontal direction perpendicular to the front-rear direction (body front-rear direction) K1 shown in FIG. 1 will be described as the body width direction (body 2 width direction) K2. Also, the direction from the central portion in the width direction of the body 2 to the right or left will be described as the outer side in the width direction of the body. The direction opposite to the outer side in the width direction of the machine body will be described as the inner side in the width direction of the machine body.

As shown in FIG. 1, the traveling device 3 includes a first crawler traveling body 3L provided on one side (left side) in the width direction K2 of the machine body 2, and a first crawler traveling body 3L provided on the other side (right side) in the width direction K2 of the machine body 2. It is a crawler-type traveling device having a second crawler traveling body 3R which is provided with a second crawler traveling body 3R. The traveling device 3 supports the body 2 so as to be able to travel. In addition, the body 2 is supported on the travel device 3 so as to be able to turn around a vertical axis (an axis extending in the vertical direction). A dozer device 7 is attached to the front portion of the traveling device 3 .

As shown in FIG. 2, the cabin 5 is mounted at a position deviated to one side (left side) from the center of the body 2 in the body width direction K2. As shown in FIG. 1 , a prime mover 9 and a bonnet 8 covering the prime mover 9 are provided at the rear portion of the airframe 2 . The type of prime mover 9 is not particularly limited, and may be, for example, an engine such as a diesel engine, or an electric motor. As shown in FIGS. 2 and 3, the bonnet 8 includes an opening/closing cover 8A that opens and closes the rear of the engine room that houses the engine 9, a first side cover 8B that covers the left side of the engine room, and a right side cover of the engine room. and an upper cover 8D covering the upper right side of the motor room. The upper cover 8D has an upper wall 8a and a front wall 8b extending downward from the front end of the upper wall 8a. A weight 15 is provided on the lower side of the bonnet 8 . A weight 15 forms the lower rear portion of the motor compartment.

As shown in FIG. 1 , the front working device 4 is arranged on the front side of the machine body 2 . Further, the front working device 4 is arranged so as to deviate from the central portion of the machine body 2 in the width direction K2 toward the other side.
As shown in FIG. 1, the front working device 4 is supported by a swing bracket 10. As shown in FIG. The swing bracket 10 is rotatably supported by a support bracket 11 provided on the body 2 so as to protrude forward. As shown in FIG. 3, the fuselage 2 has a turning base plate 2A that is rotatably supported by the travel device 3. As shown in FIG. A longitudinal rib 2B for reinforcement is fixed on the swivel base plate 2A. The vertical rib 2B is arranged leftward from the central portion in the body width direction K2, and has a support bracket 11 at its front portion.

As shown in FIG. 1 , the front working device 4 has a boom 12 , an arm 13 and a working tool (bucket) 14 . The base of the boom 12 is pivotally supported above the swing bracket 10 so as to be rotatable about a horizontal axis (an axis extending in the horizontal direction). The base of the arm 13 is pivotally supported on the tip of the boom 12 so as to be rotatable about a horizontal axis. The work tool 14 is pivotally supported at the tip of the arm 13 so as to be rotatable about a horizontal axis. The front work device 4 also has a boom cylinder 19 that drives the boom 12 , an arm cylinder 20 that drives the arm 13 , and a work implement cylinder 21 that drives the work implement 14 . The boom cylinder 19, the arm cylinder 20, and the work implement cylinder 21 are configured by hydraulic cylinders.

As shown in FIG. 3, a placement portion 16 in which the bottom portion 5a (see FIG. 4) of the cabin 5 is placed is provided on the front left side of the turning base plate 2A. The placement portion 16 is provided on the left side of the vertical rib 2B and in front of the partition member 2F that partitions the lower front portion of the motor chamber. The arrangement portion 16 is provided with a plurality of mount members (first mount member 17A to fourth mount member 17D). The first mount member 17A is arranged on the front left side of the arrangement portion 16 . The second mount member 17B is arranged on the front right side of the arrangement portion 16 . The third mount member 17</b>C is arranged on the rear left side of the arrangement portion 16 . The fourth mount member 17</b>D is arranged on the rear right side of the arrangement portion 16 . The first to fourth mount members 17A to 17D are attached to the airframe 2 via bracket members. The first to fourth mount members 17A to 17D have elastic members such as rubber.

As shown in FIG. 5 , the cabin 5 has a front pillar 22 , a rear pillar 23 , and an upper frame 24 that connects upper parts of the front pillar 22 and the rear pillar 23 . A lower portion of the rear pillar 23 is formed at a position higher than a lower portion of the front pillar 22 . Frame members composed of the front pillar 22, the rear pillar 23, and the upper frame 24 are provided on the left and right side surfaces of the cabin 5, respectively.

As shown in FIG. 2, a windshield 25 is provided between the left front pillar 22L and the right front pillar 22R, and a rear window 26 is provided between the left rear pillar 23L and the right rear pillar 23R. It is A roof 27 is provided between the left upper frame 24L and the right upper frame 24R.
As shown in FIG. 5 , the cabin 5 has a rear side panel 28 , a side window 29 and a lower side panel 30 on the right side surface. The rear side panel 28 is provided at the upper portion and rear portion of the right side portion of the cabin 5 . The side window 29 is provided between the rear side panel 28 and the upper portion of the front pillar 22R. The lower side panel 30 is provided below the side window 29 .

As shown in FIG. 3 , a support frame 31 is provided at the rear portion of the fuselage 2 . The support frame 31 is arranged behind the arrangement portion 16 . The support frame 31 supports the bonnet 8 and various devices and parts.
As shown in FIGS. 4 to 7, the support frame 31 has a front leg (first leg) 32, a rear leg 33, and side legs (second leg) . The front legs 32 are erected in front of the bonnet 8 and substantially at the center of the body 2 in the width direction K2. Specifically, the front leg portion 32 has a lower plate 36 and a strut portion 37 fixed on the lower plate 36 . The lower plate 36, as shown in FIG. 3, is bolted to a plate member 2C fixed to the upper portion of the vertical rib 2B. As shown in FIGS. 6 and 7 , the strut portion 37 extends upward from the lower plate 36 and has a front plate 38 and side plates (mounting portions) 39 . The front plate 38 is formed in a rectangular plate shape elongated in the vertical direction. The side plate 39 extends rearward from the left end of the front plate 38 . Specifically, the side plate 39 has a first portion 39a extending rearward from the upper portion of the front plate 38 and a second portion 39b extending downward from the front portion of the first portion 39a. A plurality of (three in this embodiment) mounting holes 40 are formed in the first portion 39a at intervals in the front-rear direction K1.

As shown in FIG. 6 , a first reinforcing plate 41 and a second reinforcing plate 42 are provided on the left and right sides of the front leg portion 32 . Further, as shown in FIG. 7 , an upper reinforcing member 43 is provided on the upper portion of the front leg portion 32 . The upper reinforcing member 43 includes a side wall portion 43a arranged on the right side of the first portion 39a of the side plate 39 with a space therebetween, and a lower end of the side wall portion 43a extending toward the first portion 39a and extending toward the first portion 39a. and a lower wall portion 43b connected to the .

As shown in FIG. 7 , the rear legs 33 are arranged behind the front legs 32 . As shown in FIG. 4, the rear leg portion 33 includes a mounting plate 44 bolted to the support member 2D fixed to the swivel base plate 2A, and after extending upward from the upper surface of the mounting plate 44, bends forward. It has an extending strut 45 and a connecting plate 46 fixed to the upper front end of the strut 45 . The connecting plate 46 is connected to a fixing member 47 fixed to the rear portion of the first portion 39 a of the side plate 39 and the rear portion of the upper reinforcing member 43 .

As shown in FIG. 7, the side leg 34 is spaced to the left of the front leg 32 . As shown in FIG. 4, the side leg portion 34 has a mounting plate 48 bolted to the support member 2E fixed to the swivel base plate 2A, and a strut portion 49 extending upward from the upper surface of the mounting plate 48. As shown in FIG.
As shown in FIG. 7 , the support frame 31 has a bridging member (support portion) 50 provided over the first portion 39 a of the side plate 39 of the front leg portion 32 and the side leg portion 34 . The bridging member 50 is formed of a thick plate material that is long in the body width direction K2, and is arranged so that the plate surface faces the up-down direction. The right end portion of the bridging member 50 is fixed to the lower rear portion of the first portion 39 a , and the left portion thereof is fixed to the upper end of the side leg portion 34 .

A plurality of mount members (fifth mount member 17E, sixth mount member 17F) are attached to the bridge member 50 . The fifth mounting member 17E is attached to the left portion of the construction member 50. As shown in FIG. The sixth mount member 17F is attached to the right portion of the construction member 50. As shown in FIG. The fifth mount member 17E and the sixth mount member 17F have elastic members such as rubber.
As shown in FIG. 4, the bottom portion 5a of the cabin 55 is attached to and supported by the first to fourth mounting members 17A to 17D. A rear portion of the cabin 55 is attached to and supported by the fifth mounting member 17E and the sixth mounting member 17F. Therefore, the cabin 5 is vibration-isolated and supported on the airframe 2 by the elastic members of the first to sixth mount members 17A to 17F.

The cabin 5 is spaced apart from the front legs 32 (side plates 39) (see FIGS. 8 and 9).
As shown in FIG. 6, a partition plate 51 is provided between the front leg portion 32 and the side leg portion 34 . The partition plate 51 is provided behind the arrangement portion 16 and covers the front side of the motor room. The partition plate 51 has an upper plate portion 52 , an extension portion 53 and a front plate portion 54 . The upper plate portion 52 is fixed on the bridge member 50 by the fifth mount member 17E and the sixth mount member 17F. The extension portion 53 extends upward from the rear end of the upper plate portion 52 and is formed by bending in a substantially stepped shape. The front plate portion 54 includes a first wall 54a extending in an inclined direction that shifts forward as it goes downward from the front end of the upper plate portion 52, and a first wall 54a that extends vertically downward from the lower end of the first wall 54a to the partition member 2F. and a second wall 54b that abuts via a sealing member. The upper plate portion 52 and the first wall 54 a are fixed to the side plate 39 of the front leg portion 32 .

As shown in FIG. 6 , the support frame 31 has a front frame 56 and a rear frame 57 extending rightward from the upper portion of the front leg portion 32 . The upper wall 8a of the upper cover 8D shown in FIG. 3 is attached to the front frame 56 and the rear frame 57. As shown in FIG. The front wall 8b of the upper cover 8D contacts the upper portion of the front plate 38 of the front leg 32 (see FIG. 10).
As shown in FIG. 3, on the body 2 side, a reinforcing structural component 58 is provided to reinforce the cabin 5 (driver protection structure) when the cabin 5 is deformed. Specifically, the reinforcing structural component 58 is attached to the support frame 31 as shown in FIG. Further, as shown in FIGS. 8 and 9 , the reinforcing structural component 58 is arranged with a gap C1 on the side (right side) of the cabin 5 . Since the cabin 5 is supported by the mount members 17A to 17F for vibration isolation, the cabin 5 moves slightly not only in the vertical direction but also in the horizontal direction (about several millimeters) during work or running. The gap C1 between the cabin 5 and the cabin 5 is set to a width that prevents the cabin 5 from contacting the reinforcing structural component 58 even if the cabin 5 moves due to elastic deformation of the mount members 17A to 17F during normal use such as during work or running. be done. By having this gap C1, it is possible to prevent the cabin 5 from coming into contact with the reinforcing structural part 58 during work or running, and stress concentration occurs due to the contact of the cabin 5 with the reinforcing structural part 58. can be prevented. This eliminates the need to confirm the strength required when the cabin 5 is directly reinforced. In other words, if the cabin 5 is additionally reinforced, a large number of man-hours are required to check the durable life and ensure the quality, but this becomes unnecessary. Moreover, when the cabin 5 is deformed by a load from the horizontal direction, the reinforcing structural component 58 abuts on the cabin 5 to suppress the deformation. That is, the reinforcing structural component 58 reinforces the cabin 5 when the cabin 5 is deformed.

As shown in FIG. 9, the gap C1 is formed to have a width narrower than the width of the rear side panel 28 in the machine width direction or the width of the middle part of the rear pillar 23R in the front-rear direction. The gap C1 is formed to have a width that allows the cabin 5 to come into contact with the reinforcing structural component 58 and suppress deformation from the initial stage to the middle stage of deformation of the cabin 5 . For example, the clearance C1 is set to approximately 10 mm to 20 mm. In addition, it is not limited to this numerical value.

Next, the structure of the reinforcing structural component 58 will be described in detail.
As shown in FIGS. 8 to 11, the reinforcing structural component 58 is made of plate material. The plate thickness of the reinforcing structural component 58 is appropriately determined according to the weight of the working machine 1 and the like. The reinforcing structural component 58 has a side plate portion 59 whose plate surface faces the body width direction K2, and an extension plate portion 60 extending rightward from the front end of the side plate portion 59 .

As shown in FIG. 10, the side plate portion 59 has a lower portion 59a and an upper portion 59b. The lower portion 59 a abuts on the upper portion of the side plate 39 of the front leg portion 32 in the body width direction K<b>2 and is fixed to the side plate 39 with a plurality of bolts 61 . More specifically, as shown in FIG. 9, the lower portion 59a is formed by a bolt 61 passing through the side plate portion 59 and through a mounting hole 40 formed in the side plate 39, and a nut member 63 screwed onto the bolt 61. It is fixed to the side plate 39 . A front portion 59 c of the lower portion 59 a is arranged in front of the upper plate portion 52 of the partition plate 51 and extends downward beyond the upper plate portion 52 . A rear edge 59 d of the front portion 59 c of the lower portion 59 a abuts on the upper portion of the front plate portion 54 of the partition plate 51 . A rear portion 59 h of the lower portion 59 a is arranged above the upper plate portion 52 , and a lower edge 59 e of the rear portion 59 h contacts the upper plate portion 52 .

As shown in FIGS. 10 and 11, the upper portion 59b occupies a larger proportion of the side plate portion 59 than the lower portion 59a and protrudes upward from the front leg portion 32. As shown in FIGS.
As shown in FIG. 11 , the side plate portion 59 (reinforcing structural component 58 ) is arranged laterally below the rear pillar 23 . That is, the reinforcing structural component 58 (side plate portion 59 ) faces the lower side of the rear pillar 23 . In this embodiment, the reinforcing structural component 58 faces across the lower portion of the rear pillar 23 and the lower portion of the rear side panel 28 . A rear edge 59g of the side plate portion 59 is formed to be inclined in accordance with the inclination of the rear pillar 23. As shown in FIG.

By the way, since the length from the lower end of the front pillar 22 to the roof 27 is longer than the length from the lower end of the rear pillar 23 to the roof 27, when the cabin 5 is deformed by the load from the machine width direction K2, the front pillar 22 is smooth. to bend. On the other hand, the lower end of the rear pillar 23 is located higher than the lower end of the front pillar 22, and the length from the lower end to the roof 27 is short. Therefore, by arranging the reinforcing structural component 58 on the lateral side of the lower portion of the rear pillar 23, it is possible to effectively suppress the deformation of the cabin 5 when it is deformed by the load from the fuselage width direction K2. In addition, since the cabin 5 is provided so as to deviate to the left with respect to the central portion in the width direction of the fuselage, there is a high possibility that the load from the left side will deform the cabin 5 toward the center in the width direction of the fuselage. Therefore, by arranging the reinforcing structural part 58 on the right side of the cabin 5 , the reinforcing structural part 58 can effectively suppress the deformation due to the load from the left side of the cabin 5 .

As shown in FIGS. 9 and 10, the side plate 39 is formed with an elongated hole 62 extending in the longitudinal direction K1 of the machine body. The elongated hole 62 is a hole for avoiding interference with the left end portion 56 a of the front frame 56 .
As shown in FIG. 10 , the extension plate portion 60 is integrally formed with the side plate portion 59 from the upper end to the lower end of the side plate portion 59 . That is, the reinforcing structural component 58 is formed by bending a plate material. Thereby, the strength of the reinforcing structural component 58 can be improved. A lower portion of the extension plate portion 60 is in contact with the front surface of the front wall 8b of the upper cover 8D. That is, the lower portion of the extension plate portion 60 is in contact with the front leg portion 32 via the front wall 8b. As a result, the mounting strength of the reinforcing structural component 58 to the support frame 31 can be improved, and the effect of suppressing deformation of the cabin 5 can be improved.

Although the reinforcing structural component 58 is bolted to the support frame 31, the present invention is not limited to this. For example, the reinforcing structural component 58 is fixed to the support frame 31 (front legs 32) by welding. may When the reinforcing structural component 58 is attached by welding, the lower portion 59a is fixed to the side plate 39 by plug welding, for example.
Moreover, although only one reinforcing structural component 58 is provided in the present embodiment, two or more reinforcing structural components 58 may be provided. Further, the reinforcing structural component 58 is arranged on the right side of the lower portion of the rear portion of the cabin 5, but is not limited to this. For example, the reinforcing structural component 58 may be arranged on the left side of the lower part of the cabin 5 or may also be arranged on the left side. Also, the reinforcing structural component 58
may be arranged on the right side and/or the left side of the front of the cabin 5 . Further, the reinforcing structural component 58 may be arranged on the right side and/or the left side of the intermediate portion of the cabin 5 in the longitudinal direction. Also, the reinforcing structural component 58 may be arranged forward and/or rearward of the cabin 5 .

Moreover, the reinforcing structural component 58 is not limited to being formed of a plate material, and may be formed of a block-shaped member or the like.
The working machine of this embodiment includes a machine body 2, a driver's seat 6 mounted on the machine 2, a driver protection structure (cabin 5) that protects the driver's seat 6, and reinforcing structural parts 58 that reinforce the driver protection structure. The reinforcing structural part 58 is provided on the body 2 side with a gap C1 between it and the driver protection structure, and contacts the driver protection structure when the driver protection structure deforms to suppress the deformation. do.

According to this configuration, when the driver protection structure is deformed, the driver protection structure abuts against the reinforcing structural component 58, thereby suppressing deformation of the driver protection structure. That is, without directly reinforcing the driver protection structure, the strength of the driver protection structure when deformed can be improved by the reinforcement structural component 58 . In addition, since the reinforcing structural part 58 has a gap C1 between it and the driver protective structure when the driver protective structure is not deformed, the reinforcing structural part 58 is not in contact with the driver protective structure during work or running. can be prevented from coming into contact with each other, and the occurrence of stress concentration due to contact of the driver protection structure with the reinforcing structural component 58 can be prevented.

In addition, the driver protection structure (cabin 5) is arranged to deviate to one side from the center in the body width direction K2, and the reinforcing structural component 58 is arranged to the other side of the driver protection structure.
According to this configuration, it is possible to effectively suppress deformation when the driver protection structure is deformed by a load from the biased side.
Further, it comprises a prime mover 9 mounted on the fuselage 2 behind the driver protection structure (cabin 5), a bonnet 8 covering the prime mover 9, and a support frame 31 attached to the fuselage 2 to which the bonnet 8 is attached. , the reinforcing structural part 58 is fixed to the support frame 31 .

According to this configuration, by mounting the reinforcing structural component 58 using the support frame 31, the mounting structure of the reinforcing structural component 58 can be simplified, and the driver protective structure can be protected from deformation when the driver protective structure is deformed. A load can be received by the support frame 31 .
The driver protection structure is the cabin 5 that surrounds the driver's seat 6, and the support frame 31 includes a support portion (construction member 50) on which the rear portion of the cabin 5 is placed and supported, and laterally of the support portion. and a mounting portion (side plate 39) provided to which the reinforcing structural component 58 is fixed.

According to this configuration, it is possible to suppress the deformation of the cabin 5 when it is deformed.
Further, the cabin 5 has a front pillar 22 and a rear pillar 23 whose lower portion is formed at a position higher than the lower portion of the front pillar 22, and the reinforcing structural component 58 is arranged laterally below the rear pillar 23. there is
According to this configuration, it is possible to suppress deformation of the rear pillar 23, which causes local deformation during deformation.

In addition, the airframe 2 is provided with mount members 17A to 17F for anti-vibration support of the driver protection structure (cabin 5). The width is set so that the driver protection structure does not come into contact with 58 .
According to this configuration, even if the driver protection structure moves due to elastic deformation of the mount members 17A to 17F during work or running, it is possible to prevent the driver protection structure from coming into contact with the reinforcing structural component 58. , the occurrence of stress concentration due to contact of the driver protection structure with the reinforcing structure part 58 can be prevented.

Although one embodiment of the present invention has been described above, it should be considered that the embodiment disclosed this time is illustrative in all respects and is not restrictive. The scope of the present invention is indicated by the scope of the claims rather than the above description, and is intended to include all modifications within the scope and meaning equivalent to the scope of the claims.

2 airframe 5 driver protection structure (cabin)
6 driver's seat 8 bonnet 9 prime mover 17A mount member (first mount member)
17B mount member (second mount member)
17C mount member (third mount member)
17D mount member (fourth mount member)
17E mount member (fifth mount member)
17F mount member (sixth mount member)
22 front pillar 23 rear pillar 31 support frame 39 mounting portion (side plate)
50 support part (construction member)
58 Reinforcing structural part C1 Gap K2 Body width direction

Claims (6)

Airframe and
a driver's seat mounted on the aircraft;
In the driver protection structure for protecting the driver's seat, the structure is arranged so as to deviate to one side from the center of the vehicle body in the width direction of the vehicle body, and the position of the lower part of the rear part is higher than the position of the lower part of the front part. a formed driver protection structure ;
a support frame disposed on the rear side of the driver protection structure;
a reinforcing structural component that reinforces the driver protection structure;
with
The support frame includes a first leg portion disposed on the other side of the driver protection structure in the width direction of the fuselage and having a lower portion attached to the fuselage. a second leg spaced to one side of the direction and having a lower portion attached to the fuselage; a support portion on which the rear portion of the person protection structure is placed and supported;
The first leg portion includes a plate-like front plate that is long in the vertical direction, and an end portion of the front plate on one side in the width direction of the machine body, extending rearward from the end portion of the front plate on one side in the width direction of the machine body. and a side plate to which the end on the other side of the is fixed,
The reinforcing structural part is provided on the body side with a gap between it and the driver protection structure, and contacts the driver protection structure when the driver protection structure is deformed to suppress the deformation . a lower part fixed above and in front of the part to which the end of the support part of the side plate is fixed; and an upper part extending upward from the lower part and protruding upward from the first leg part. A work machine having a part . The side plate includes a first portion extending rearward from an upper portion of the front plate and having an end portion of the support portion on the other side in the vehicle width direction fixed to a rear lower portion, and a front portion of the first portion. a second portion extending downward from the
The reinforcing structural component is formed of a plate material and has a side plate portion including the lower portion and the upper portion and having a plate surface facing the width direction of the aircraft body,
The lower portion of the side plate portion is in contact with the upper portion of the side plate in the vehicle width direction, the front portion is fixed to the upper portion of the side plate in front of the support portion, and the rear portion is above the support portion. Said
The work machine according to claim 1, wherein the work machine is fixed to the upper part of the side plate . a prime mover mounted on the airframe behind the driver protection structure;
a bonnet covering the prime mover and attached to the support frame ;
with
3. The operation according to claim 2 , wherein the reinforcing structural component has an extending plate portion extending from the front end of the side plate portion to the other side in the vehicle body width direction and arranged in front of the front plate. machine. The working machine according to any one of claims 1 to 3, wherein the driver protection structure is a cabin surrounding the driver's seat. The cabin includes a front pillar, a rear pillar provided behind the front pillar and having a lower portion higher than a lower portion of the front pillar, and an upper connecting the upper portions of the front pillar and the rear pillar. a frame on one side of the cabin in the machine width direction and a side of the cabin on the other side in the machine width direction ,
A side window provided behind the front pillar and below the upper frame and a side window provided between the side window and the rear pillar are provided on a side surface portion of the cabin on the other side in the width direction of the aircraft body. A rear side panel is provided,
5. The working machine according to claim 4, wherein the reinforcing structural component is arranged laterally of the lower portion of the rear pillar so as to face the lower portion of the rear pillar and the lower portion of the rear side panel . A mount member for anti-vibration support of the driver protection structure is provided on the fuselage,
6. The gap according to claim 1, wherein the gap is set to a width such that the driver protection structure does not come into contact with the reinforcing structural component even if the driver protection structure moves due to elastic deformation of the mount member. Work machine as described.

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