Work equipment

Abstract

Provided is a work machine in which the location where a pattern-switching device (41) is positioned can be ensured even if it the work machine is small.　This work machine is equipped with a plurality of hydraulic actuators (15, 16, 17, M1), the work machine comprising a machine body (2), a driver seat (5) installed on the machine body (2), an operation console (20) erected on the machine body (2) in front of the driver seat (5), a steering member (31) for operating the plurality of hydraulic actuators (15, 16, 17, M1), and a pattern-switching device (41) for switching an operation pattern for the plurality of hydraulic actuators (15, 16, 17, M1) of the steering member (31) to a plurality of operation patterns. The interior of the operation console (20) has a switching device positioning section (46) where the pattern-switching device (41) is positioned.

Description

[Technical Field]

[0001] The present invention relates to a work machine. [Background technology]

[0002] BACKGROUND ART A working machine disclosed in Patent Document 1 is known in the prior art.

[0003] The work machine disclosed in Patent Document 1 is equipped with multiple hydraulic actuators. A control member for operating the multiple hydraulic actuators is provided on the side of the driver's seat mounted on the machine body. The machine body is also equipped with a pattern switching device that switches the operation pattern of the control member for the multiple hydraulic actuators between multiple operation patterns. The pattern switching device is located below the driver's seat. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2014-32462 Summary of the Invention [Problem to be solved by the invention]

[0005] However, in small-sized work machines, it is difficult to locate the pattern switching device below the driver's seat due to space limitations.

[0006] In view of the above-mentioned problems, an object of the present invention is to provide a work machine that can ensure a place for installing a pattern switching device even if the work machine is small. [Means for solving the problem]

[0007] A working machine according to one aspect of the present invention is a working machine equipped with a plurality of hydraulic actuators, and includes a machine body, a driver's seat mounted on the machine body, an operation console erected on the machine body in front of the driver's seat, a control member for operating the plurality of hydraulic actuators, and a pattern switching device for switching the operation pattern of the control member for the plurality of hydraulic actuators into a plurality of operation patterns, and the operation console has 、 A switching device arrangement unit for arranging the pattern switching device The pattern switching device has an opening formed on its outer surface at a position corresponding to the pattern switching device and a cover member for opening and closing the opening, and the pattern switching device has a switching lever that can be swung to switch the operation pattern, and that can be moved between a drawn-out state in which it protrudes from the opening and a stored state in which it is stored inside the cover member. are.

[0008] According to one aspect of the present invention The work equipment is A work machine equipped with a plurality of hydraulic actuators, comprising: a machine body; a traveling device that supports the machine body so that it can travel; A driver's seat mounted on the aircraft body, and an operation console erected on the aircraft body in front of the driver's seat; a travel lever provided at approximately the center of the upper part of the operation console in the width direction of the machine body and for operating the travel device; a control member for controlling the plurality of hydraulic actuators; and a pattern switching device for switching an operation pattern of the control member with respect to the plurality of hydraulic actuators among a plurality of operation patterns; the operation console has a support frame attached to the machine body, a cover member that covers the support frame, and a travel lever support portion that is provided on an upper portion of the support frame and supports the travel lever, Furthermore, the operation console has a switching device placement unit in which the pattern switching device is placed, The switching device arrangement portion is provided inside the cover member, to the side of the travel lever support portion in the vehicle width direction, and above the support frame.

[0009] The work machine may include a control valve including a plurality of control valves that control the plurality of hydraulic actuators, the support frame may have a first side plate and a second side plate arranged opposite each other and spaced apart in the width direction of the machine body, and a connecting plate that connects the upper parts of the first side plate and the second side plate, the control valve may be arranged below the connecting plate and between the first side plate and the second side plate, the travel lever support part may be provided in approximately the center of the width direction of the machine body on the connecting plate, and the switching device arrangement part may be provided on the connecting plate between the travel lever support part and the first side plate or the second side plate.

[0010] The operation console may have an opening formed in the cover member at a position corresponding to the pattern switching device, and a lid member for opening and closing the opening, the plurality of operation patterns including a first operation pattern and a second operation pattern that is different from the first operation pattern, the pattern switching device having a switching lever that can be swung between a first operation position that switches the operation pattern to the first operation pattern and a second operation position that switches the operation pattern to the second operation pattern, and the switching lever may be movable between a drawn-out state in which it protrudes from the opening and a stored state in which it fits inside the lid member at each of the first operation position and the second operation position.

[0011] A working machine according to one aspect of the present invention is a working machine equipped with a plurality of hydraulic actuators, and comprises a machine body, a cover member equipped on the machine body, a control member that controls the plurality of hydraulic actuators, and a pattern switching device that switches the operation pattern of the control member for the plurality of hydraulic actuators between a plurality of operation patterns, the pattern switching device being housed inside the cover member, the cover member having an opening formed at a position corresponding to the pattern switching device and a lid member that opens and closes the opening, the plurality of operation patterns including a first operation pattern and a second operation pattern, the pattern switching device having a switching lever that can be swung between a first operation position that switches the operation pattern to the first operation pattern and a second operation position that switches the operation pattern to the second operation pattern, and the switching lever can be moved between a drawn-out state in which it protrudes from the opening and a stored state in which it fits inside the lid member at each of the first operation position and the second operation position.

[0012] The work machine may be provided with an abutment member that abuts against the switching lever in a state where the switching lever protrudes from the opening and prevents the movement of the switching lever when the switching lever is moved in a direction from the pulled-out state to the stored state within an operating range between the first operating position and the second operating position.

[0013] The work machine may include a plurality of control valves that are provided corresponding to the plurality of hydraulic actuators to control the plurality of hydraulic actuators and are pilot-operated by the operating member, and the pattern switching device may include a pattern switching valve that switches the operation pattern by switching the direction of the flow of pilot oil that pilot-operates the control valve with the operating member, a pivot shaft that serves as a pivot point for the switching lever, a swing arm that is supported rotatably around the pivot shaft and has a switching lever support portion that supports the switching lever so that it can move between the extended state and the stored state, and an interlocking mechanism that interlocks and connects the swing arm and the valve body of the pattern switching valve. [Effects of the Invention]

[0014] According to the above-described work machine, even if the work machine is small, it is possible to secure a place to install the pattern switching device. [Brief explanation of the drawings]

[0015] [Figure 1] FIG. [Figure 2] FIG. [Figure 3] FIG. [Figure 4] FIG. [Figure 5] FIG. [Figure 6] FIG. 10 is a diagram illustrating an example of an operation pattern. [Figure 7] FIG. 2 is a perspective view of the pattern switching device as seen from the front. [Figure 8] FIG. 2 is a perspective view of the pattern switching device as seen from the rear. [Figure 9] FIG. 4 is a side cross-sectional view of a portion where a pattern switching device is disposed. [Figure 10] FIG. 4 is a plan view of the pattern switching device in a first operation pattern. [Figure 11] FIG. 10 is a plan view of the pattern switching device in a second operation pattern. [Figure 12]FIG. 2 is a perspective view of the operation console with the cover member open. [Figure 13] FIG. 4 is a plan view showing each position of the switching lever. [Figure 14] FIG. 10 is a plan view of a pattern switching device according to another embodiment. [Figure 15] FIG. 10 is a perspective view of a pattern switching device according to another embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0016] Hereinafter, an embodiment of the present invention will be described with reference to the drawings as appropriate.

[0017] 1 is a schematic side view of a working machine 1 according to this embodiment. In this embodiment, the working machine 1 is exemplified by a small backhoe, which is a rotating working machine.

[0018] As shown in Fig. 1, the work machine 1 includes a traveling body 1A and a work device 4 mounted on the traveling body 1A. The traveling body 1A includes a traveling device 3 and a machine body (swivel base) 2 mounted on the traveling device 3. The machine body 2 is equipped with a driver's seat 5 where an operator sits.

[0019] In this embodiment, the front side (the direction of arrow K1 in FIG. 1) of the operator seated in the driver's seat 5 will be described as the front, the rear side (the direction of arrow K2 in FIG. 1) of the operator will be described as the rear, the left side of the operator (the near side in FIG. 1) will be described as the left side, and the right side of the operator (the far side in FIG. 1) will be described as the right side. The direction of arrow K3 in FIG. 1 will be described as the front-rear direction (the fore-and-aft direction of the machine body), and the horizontal direction perpendicular to the front-rear direction K3 will be described as the machine body width direction (the width direction of the machine body 2). The direction from the center of the width direction of the machine body 2 toward the right or left will be described as the machine body outward (outward in the width direction of the machine body). In other words, the machine body outward is the direction away from the center of the width direction of the machine body 2 in the width direction. The opposite direction to the machine body outward will be described as the machine body inward (inward in the width direction of the machine body). In other words, the machine body inward is the direction toward the center of the width direction of the machine body 2 in the machine body width direction.

[0020] As shown in FIG. 1, the machine body 2 is supported by the traveling device 3 so as to be rotatable around a vertical axis (an axis extending in the up-down direction). The machine body 2 has a swivel base 6 that forms the bottom of the machine body 2, and a weight 7 attached to the rear of the swivel base 6. The swivel base 6 is supported on the frame of the traveling device 3 via a bearing 19 so as to be rotatable around the vertical axis, and rotates left and right by driving a swing motor M1 consisting of a hydraulic motor (hydraulic actuator). A step plate 26 is disposed above the swivel base 6 on which an operator seated in the driver's seat 5 can place their feet. The space between the swivel base 6 and the step plate 26 is covered by a side cover 27. The work device 4 is attached to the front of the machine body 2. The weight 7 is a counterweight for balancing the weight of the work device 4. A rope protector 24 is provided on the machine body 2 to protect the operator seated in the driver's seat 5.

[0021] A hood 8 is disposed above the rear of the machine body 2. A driver's seat 5 is disposed above the hood 8. The hood 8 can be rotated rearward as indicated by the two-dot chain line in FIG. 1 to open the interior of the hood 8. Inside the hood 8, there are disposed a prime mover 10 which serves as a drive source, a hydraulic oil tank 9 which stores hydraulic oil for driving hydraulic actuators such as hydraulic cylinders and hydraulic motors equipped to the work machine 1, a hydraulic pump (not shown) which draws up and discharges the hydraulic oil in the hydraulic oil tank 9, and the like. Note that in this embodiment, a diesel engine is used as the prime mover 10, but the present invention is not limited to this, and the prime mover 10 may be, for example, another internal combustion engine such as a gasoline engine, or an electric motor.

[0022] As shown in FIG. 1, the traveling devices 3 are crawler-type traveling devices and are provided below the right and left sides of the machine body 2. The traveling devices 3 are driven by traveling motors 28 consisting of hydraulic motors. A dozer 11 is provided in front of the traveling devices 3. The dozer 11 is driven by a dozer cylinder (not shown).

[0023] As shown in FIG. 1, the working device 4 has a boom 12, an arm 13, and a bucket 14 as a working implement. The working device 4 further has a boom cylinder 15, an arm cylinder 16, and a bucket cylinder 17 as a working implement cylinder as drive mechanisms for the boom and the like. The boom cylinder 15, arm cylinder 16, bucket cylinder 17, and dozer cylinder are made up of hydraulic cylinders (hydraulic actuators). These hydraulic cylinders are driven by hydraulic oil supplied from a hydraulic oil tank 9 via a hydraulic pump. The working device 4 is operated by a control lever 31, which will be described later.

[0024] The base end of the boom 12 is pivotally supported to swing freely about a horizontal axis on a swing bracket 18 provided at the front of the machine body 2. The swing bracket 18 is pivotally supported to swing freely about a vertical axis with respect to a support bracket 29 provided on the machine body 2. A swing cylinder (not shown) consisting of a hydraulic cylinder is attached to the machine body 2, and the swing bracket 18 swings when driven by the swing cylinder. The base end of an arm 13 is pivotally supported to swing freely about a horizontal axis on the tip of the boom 12. A bucket 14 is attached to the tip of the arm 13.

[0025] The boom cylinder 15 connects the swing bracket 18 to the middle portion of the boom 12. The boom 12 swings up and down due to the extension and contraction of the boom cylinder 15. In this embodiment, the boom 12 swings in a boom-raising direction D1 when the boom cylinder 15 contracts, and the boom 12 swings in a boom-lowering direction D2 when the boom cylinder 15 extends.

[0026] The arm cylinder 16 connects the middle part of the boom 12 and the base end part of the arm 13. The arm 13 swings up and down by extension and contraction of the arm cylinder 16. In this embodiment, the arm 13 swings in an arm-raising direction (arm dumping direction) D3 by contracting the arm cylinder 16, and swings in an arm-lowering direction (arm crowding direction) D4 by extending the arm cylinder 16.

[0027] The bucket cylinder 17 connects the base end of the arm 13 and the mounting portion of the bucket 14. The bucket 14 performs scooping and dumping operations by extending and contracting the bucket cylinder 17. In this embodiment, the bucket 14 swings in a dumping direction (bucket dump direction) D5 when the bucket cylinder 17 contracts, and swings in a scooping direction (bucket crowding direction) D6 when the bucket cylinder 17 extends.

[0028] As shown in Fig. 2, control stands 30 are disposed on the left and right of the driver's seat 5. The control stand 30 disposed to the left of the driver's seat 5 is referred to as the first control stand 30L, and the control stand 30 disposed to the right of the driver's seat 5 is referred to as the second control stand 30R.

[0029] The first control platform 30L is equipped with a control member 31 (first control lever 31L) that operates multiple hydraulic actuators, a remote control valve 21 (first remote control valve 21L) that is a pilot valve operated by the first control lever 31L, and a first control lever 43L that operates to swing the first control platform 30L up and down.

[0030] The first control lever 31L can operate two control objects equipped on the work machine 1. More specifically, the first control lever 31L can be tilted forward, backward, left, and right, and one control object is operated by tilting it forward and backward, and the other control object is operated by tilting it left and right. The first control lever 31L pilot-operates a control valve (pilot-operated switching valve) that controls the control object by operating the first remote control valve 21L. More specifically, by tilting the first control lever 31L forward and backward or left and right, pilot oil corresponding to the amount of tilt is output from the first remote control valve 21L to the control valve that controls the control object.

[0031] The second control platform 30R is equipped with a control member 31 (second control lever 31R) that operates multiple hydraulic actuators, a remote control valve 21 (second remote control valve 21R) that is a pilot valve operated by the second control lever 31R, and a second control lever 43R that operates to swing the second control platform 30R up and down.

[0032] The second control lever 31R can also operate two control objects equipped on the work machine 1. More specifically, the second control lever 31R can also be tilted forward, backward, left, and right, and tilting it forward and backward operates one control object, while tilting it left and right operates the other control object. The second control lever 31R pilot-operates a control valve (pilot-operated switching valve) that controls the control object by operating the second remote control valve 21R. More specifically, by tilting the second control lever 31R forward and backward or left and right, pilot oil corresponding to the amount of tilt is output from the second remote control valve 21R to the control valve that controls the control object.

[0033] The objects operated by the first control lever 31L and the second control lever 31R are, for example, the swing motor M1 (machine body 2), the boom cylinder 15 (boom 12), the arm cylinder 16 (arm 13), and the bucket cylinder 17 (bucket 14). In other words, the control member 31 can perform the swing operation of the machine body 2, the swing operation of the boom 12, the swing operation of the arm 13, and the swing operation of the bucket 14.

[0034] As shown in Fig. 1, an operation console 20 is provided at the front on the step board 26. The operation console 20 is erected on the machine body 2 in front of the driver's seat 5 and the hood 8. Various operating members are attached to the operation console 20.

[0035] As shown in FIG. 3 , the various operating members include a pair of travel levers 22, a dozer lever 60, an accelerator lever 61, a swing pedal 32, a speed change pedal 33, and an SP pedal 34. The pair of travel levers 22 are levers that operate the travel device 3 (travel motor 28). The dozer lever 60 is a lever that operates the dozer 11 (dozer cylinder). The accelerator lever 61 is a lever that controls the rotation of the prime mover 10. The swing pedal 32 is a pedal that operates the swing bracket 18 (swing cylinder). The speed change pedal 33 is a pedal that switches the speed of the travel device 3 between first speed and second speed, which is higher than first speed. The SP pedal 34 is a pedal that operates another working tool (hydraulic attachment) that can be driven by a hydraulic actuator and is attached instead of or in addition to the bucket 14.

[0036] As shown in FIG. 4, the operation console 20 has a support frame 36 attached to the machine body 2 and a cover member 37 that covers the support frame 36.

[0037] The support frame 36 has a first side plate 36A, a second side plate 36B, a connecting plate 36C, and a fixing plate 36D. The first side plate 36A and the second side plate 36B are formed from plates that are long in the vertical direction and are arranged opposite each other with their plate surfaces facing the width direction of the machine body and spaced apart in the width direction of the machine body. The connecting plate 36C is arranged between the upper parts of the first side plate 36A and the second side plate 36B and connects the upper parts of the first side plate 36A and the second side plate 36B to each other. The fixing plate 36D is fixed to the lower end of the first side plate 36A and the lower end of the second side plate 36B, and is fixed to the machine body 2 (step plate 26) with bolts or the like.

[0038] As shown in FIG. 3, the cover member 37 is divided into two parts: a front cover 37A and a rear cover 37B.

[0039] As shown in Figure 4, the pair of travel levers 22 are arranged side by side in the width direction of the machine body at approximately the center of the machine body width direction of the operation console 20. The bases of the travel levers 22 are arranged inside the cover member 37 and are supported so as to be swingable in the front-to-rear direction K3 by travel lever supports 38 provided at approximately the center of the machine body width direction of the connecting plate 36C (operation console 20). The tops of the pair of travel levers 22 protrude upward from the cover member 37.

[0040] A control valve 23 is disposed inside the operation console 20. The control valve 23 is disposed below the connecting plate 36C and between the first side plate 36A and the second side plate 36B, and is attached to the first side plate 36A and the second side plate 36B. In other words, the control valve 23 is attached to the support frame 36.

[0041] The control valve 23 is an assembly of multiple control valves V1 to V10 that control the hydraulic actuators (including hydraulic actuators that are installed later) installed on the work machine 1. More specifically, the control valve 23 is a valve unit configured by arranging multiple control valves V1 to V10 side by side in the width direction of the machine body and connecting them to each other. Note that the control valve 23 may also have a structure formed by incorporating multiple control valves inside a common valve body.

[0042] The control valves constituting the control valve 23 are direct acting spool type directional control valves that switch the direction of hydraulic oil that operates the hydraulic actuators. Specifically, the control valves are a speed control valve V1, a swing control valve V2, an arm control valve V3, a first traveling control valve V4, a dozer control valve V5, a standby control valve V6, a second traveling control valve V7, a swing control valve V8, a bucket control valve V9, and a boom control valve V10.

[0043] The speed change control valve V1 is operated by the speed change pedal 33 and controls, for example, a swash plate angle cylinder that changes the tilt angle of the swash plate of the travel motor 28. The swing control valve V2 controls the swing motor M1. The arm control valve V3 controls the arm cylinder 16. The first travel control valve V4 is operated by the left travel lever 22 and controls the travel motor 28 of the left travel unit 3. The dozer control valve V5 is operated by the dozer lever 60 and controls the dozer cylinder. The standby control valve V6 is operated by the SP pedal 34 and controls the hydraulic attachment. The second travel control valve V7 is operated by the right travel lever 22 and controls the travel motor 28 of the right travel unit 3. The swing control valve V8 is operated by the swing pedal 32 and controls the swing cylinder. The bucket control valve V9 controls the bucket cylinder 17. The boom control valve V10 controls the boom cylinder 15.

[0044] The swing control valve V2, arm control valve V3, bucket control valve V9, and boom control valve V10 are pilot-operated switching valves that are pilot-operated by the first control lever 31L (first remote control valve 21L) and the second control lever 31R (second remote control valve 21R).

[0045] In addition, the speed change control valve V1, the first traveling control valve V4, the dozer control valve V5, the spare control valve V6, the second traveling control valve V7, and the swing control valve V8 are control valves (other control valves) that control the objects operated by the various operating members (speed change pedal 33, traveling lever 22, dozer lever 60, SP pedal 34, swing pedal 32) attached to the operation console 20.

[0046] The arrangement of the control valves in the control valve 23 is an example and is not limited to that shown in the figure.

[0047] As shown in FIG. 2, a first tube 39A and a second tube 39B, each made of a flexible tube, are arranged at the lower end of the left side of the hood 8. The first tube 39A extends from the rear side of the first remote control valve 21L, passes through the inside of the machine body 2, and is arranged to the lower end of the left side of the operation console 20 (see FIG. 3). A plurality of pilot hoses connected to the first remote control valve 21L are bundled and inserted (housed) in the first tube 39A. The second tube 39B extends from the rear side of the second remote control valve 21R, passes through the inside of the machine body 2, and is arranged to the lower end of the left side of the operation console 20 (see FIG. 3). A plurality of pilot hoses connected to the second remote control valve 21R are bundled and inserted (housed) in the second tube 39B.

[0048] 3 and 4, a pattern switching device 41 is provided inside the operation console 20 to switch the operation pattern of the control members 31 (first control lever 31L, second control lever 31R) for the multiple hydraulic actuators (boom cylinder 15, arm cylinder 16, bucket cylinder 17, swing motor M1) between multiple operation patterns. The pattern switching device 41 has a pattern switching valve 42 that switches the operation pattern by switching the direction of the flow of pilot oil that pilot-operates the control valve with the control members 31.

[0049] 5, in this embodiment, the pattern changeover valve 42 is provided midway through a pilot circuit extending from the first remote control valve 21L and the second remote control valve 21R to the boom control valve V10 and the arm control valve V3. Specifically, the first remote control valve 21L is connected to the pattern changeover valve 42 by a first pilot oil line F1 and a second pilot oil line F2. The second remote control valve 21R is connected to the pattern changeover valve 42 by a third pilot oil line F3 and a fourth pilot oil line F4. The arm control valve V3 has a dump pressure receiving portion 44a and a crowd pressure receiving portion 44b. The dump pressure receiving portion 44a is connected to the pattern changeover valve 42 via a fifth pilot oil line F5, and the crowd pressure receiving portion 44b is connected to the pattern changeover valve 42 via a sixth pilot oil line F6. The boom control valve V10 has a lowering pressure receiving portion 45a and a raising pressure receiving portion 45b, and the lowering pressure receiving portion 45a is connected to the pattern switching valve 42 via the seventh pilot oil passage F7, and the raising pressure receiving portion 45b is connected to the pattern switching valve 42 via the eighth pilot oil passage F8.

[0050] In this embodiment, the operation patterns switched by the pattern switching device 41 include a first operation pattern and a second operation pattern shown in FIG.

[0051] 6, in the first operation pattern, tilting the first control lever 31L forward or backward causes the arm 13 to swing, and tilting the first control lever 31L left or right causes the machine body 2 to turn. Also, tilting the second control lever 31R forward or backward causes the boom 12 to swing, and tilting the second control lever 31R left or right causes the bucket 14 to swing.

[0052] In the second operation pattern, tilting the first control lever 31L forward or backward causes the boom 12 to swing, and tilting the first control lever 31L left or right causes the machine body 2 to turn. Also, tilting the second control lever 31R forward or backward causes the arm 13 to swing, and tilting the second control lever 31R left or right causes the bucket 14 to swing.

[0053] As described above, in this embodiment, in the first operation pattern, the arm 13 is operated by tilting the first control lever 31L back and forth, and the boom 12 is operated by tilting the second control lever 31R back and forth, whereas in the second operation pattern, the boom 12 is operated by tilting the first control lever 31L back and forth, and the arm 13 is operated by tilting the second control lever 31R back and forth.

[0054] In detail, in the first operation pattern, when the first control lever 31L is tilted forward, the pilot pressure acts on the dump pressure receiving section 44a via the first pilot oil passage F1 → pattern switching valve 42 → fifth pilot oil passage F5, causing the arm cylinder 16 to contract and the arm 13 to perform a dump operation, and when the first control lever 31L is tilted backward, the pilot pressure acts on the cloud pressure receiving section 44b via the second pilot oil passage F2 → pattern switching valve 42 → sixth pilot oil passage F6, causing the arm cylinder 16 to extend and the arm 13 to perform a cloud operation. In addition, when the second control lever 31R is tilted forward, the pilot pressure acts on the lowering pressure receiving section 45a via the third pilot oil passage F3 → pattern switching valve 42 → seventh pilot oil passage F7, causing the boom cylinder 15 to extend and the boom to lower, and when the second control lever 31R is tilted backward, the pilot pressure acts on the raising pressure receiving section 45b via the fourth pilot oil passage F4 → pattern switching valve 42 → eighth pilot oil passage F8, causing the boom cylinder 15 to contract and the boom 12 to raise.

[0055] In addition, in the second operation pattern, when the first control lever 31L is tilted forward, the pilot pressure acts on the lowering pressure receiving section 45a via the first pilot oil passage F1 → pattern switching valve 42 → seventh pilot oil passage F7, the boom cylinder 15 extends, and the boom 12 performs a lowering operation, and when the first control lever 31L is tilted backward, the pilot pressure acts on the raising pressure receiving section 45b via the second pilot oil passage F2 → pattern switching valve 42 → eighth pilot oil passage F8, the boom cylinder 15 contracts, and the boom 12 performs a raising operation. In addition, when the second control lever 31R is tilted forward, the pilot pressure acts on the dump pressure receiving section 44a via the third pilot oil passage F3 → pattern switching valve 42 → fifth pilot oil passage F5, causing the arm cylinder 16 to contract and the arm 13 to perform a dump operation, and when the second control lever 31R is tilted backward, the pilot pressure acts on the cloud pressure receiving section 44b via the fourth pilot oil passage F4 → pattern switching valve 42 → sixth pilot oil passage F6, causing the arm cylinder 16 to extend and the arm 13 to perform a cloud operation.

[0056] The number of operation patterns switched by the pattern switching device 41 may be three or more, and the control valves switched by the pattern switching device 41 are not limited to the boom control valve V10 and the arm control valve V3.

[0057] 3 and 4, the pattern switching device 41 is disposed in the upper part of the operation console 20. In this embodiment, the pilot hoses routed from the first remote control valve 21L and the second remote control valve 21R to the operation console 20 are inserted from the lower end of the left side of the operation console 20, and therefore the pattern switching device 41 is disposed in the upper left part of the operation console 20 so that the pilot hoses can be easily routed. However, the pattern switching device 41 may also be disposed in the upper right part of the operation console 20.

[0058] 4, the pattern switching device 41 is disposed inside the cover member 37, laterally of the travel lever support member 38 in the width direction of the machine body, and above the support frame 36. In other words, the operation console 20 has a switching device mounting section 46 for mounting the pattern switching device 41 therein, and the switching device mounting section 46 is disposed inside the cover member 37, laterally of the travel lever support member 38 in the width direction of the machine body, and above the support frame 36. More specifically, the switching device mounting section 46 is disposed on the connecting plate 36C between the travel lever support member 38 and the first side plate 36A. The switching device mounting section 46 may also be disposed on the connecting plate 36C between the travel lever support member 38 and the second side plate 36B.

[0059] As shown in Figures 7 and 8, the pattern switching device 41 has a valve bracket 47 to which the pattern switching valve 42 is attached, the pattern switching valve 42, an operating mechanism 48 that operates the pattern switching valve 42, and an abutment member 49.

[0060] The valve bracket 47 has a mounting wall 47a that is placed on the connecting plate 36C and attached to the connecting plate 36C with bolts or the like, and a vertical wall 47b that extends upward from the right end (the travel lever support portion 38 side) of the mounting wall 47a.

[0061] As shown in FIG. 9, the pattern switching valve 42 is configured by a rotary valve, and has a valve body 42a and a valve element 42b.

[0062] As shown in FIGS. 7 and 8, the valve body 42a is disposed above the mounting wall 47a of the valve bracket 47 and to the left of the vertical wall 47b, and is fixed to the vertical wall 47b with bolts or the like.

[0063] 9, the valve element 42b is formed in a substantially cylindrical shape and is inserted into the valve body 42a so as to be rotatable about an axis extending in the vertical direction. The upper part of the valve element 42b protrudes upward from the valve body 42a.

[0064] As shown in Fig. 7, ports (first port P1, second port P2, third port P3, and fourth port P4) connected to the remote control valves 21 (first remote control valve 21L, second remote control valve 21R) are formed on the front surface of the valve body 42a. For example, as shown in Fig. 5, a first pilot oil passage F1 is connected to the first port P1, a second pilot oil passage F2 is connected to the second port P2, and a third pilot oil passage F3 is connected to the third port P3. A fourth pilot oil passage F4 is connected to the fourth port P4.

[0065] As shown in Fig. 8, ports (a fifth port P5, a sixth port P6, a seventh port P7, and an eighth port P8) connected to the control valves (the boom control valve V10 and the arm control valve V3) are formed on the back surface of the valve body 42a. For example, as shown in Fig. 5, the fifth port P5 is connected to the fifth pilot oil passage F5, the sixth port P6 is connected to the sixth pilot oil passage F6, the seventh port P7 is connected to the seventh pilot oil passage F7, and the eighth port P8 is connected to the eighth pilot oil passage F8.

[0066] As shown in Fig. 7, a first restricting portion 50A and a second restricting portion 50B are provided on the upper surface of the valve body 42a. The first restricting portion 50A and the second restricting portion 50B are each formed by a pin. The first restricting portion 50A is provided in the front portion of the upper surface of the valve body 42a (in front of the upper part of the valve body 42b). The second restricting portion 50B is provided in the right portion of the upper surface of the valve body 42a (to the right of the upper part of the valve body 42b).

[0067] As shown in FIG. 7, an abutment portion 51 is provided on the upper portion of the valve body 42b. The abutment portion 51 is formed by a pin. The abutment portion 51 is provided to protrude radially outward from the valve body 42b. As shown in FIG. 10, the abutment portion 51 abuts against the first restriction portion 50A from the right and restricts counterclockwise rotation of the valve body 42b. As shown in FIG. 11, the abutment portion 51 abuts against the second restriction portion 50B from the front and restricts clockwise rotation of the valve body 42b. Therefore, the valve body 42b can be switched between a position where the abutment portion 51 abuts against the first restriction portion 50A and a position where the abutment portion 51 abuts against the second restriction portion 50B. FIG. 10 shows a state of the pattern switching device 41 when the operation pattern is switched to the first operation pattern, and FIG. 11 shows a state of the pattern switching device 41 when the operation pattern is switched to the second operation pattern.

[0068] As shown in FIGS. 7 and 8, the operation mechanism 48 has a rotation support shaft 52, a swing arm 53, a switching lever 54, and an interlocking mechanism 55.

[0069] 10 and 11, the pivot shaft 52 is disposed so as to extend in the vertical direction above the rear and right part of the pattern switching valve 42. The pivot shaft 52 has a lower portion fixed to a support stay 56 that is fixed to the upper portion of the vertical wall 47b of the valve bracket 47 (see FIG. 9).

[0070] 7, 8, and 10, the swing arm 53 has a support piece 53a, a switching lever support portion 53b, and an arm portion 53c. The support piece 53a is supported on the pivot shaft 52 so as to be rotatable about its axis. Therefore, the swing arm 53 can swing back and forth about the axis of the pivot shaft 52. Furthermore, a disc spring 57 is inserted through the pivot shaft 52 and placed on the support piece 53a, and an anti-rotation nut 58 is screwed onto the pivot shaft 52 above the disc spring 57.

[0071] 8, the switching lever support portion 53b is provided at the lower end of an extension portion 53d that extends downward from the support piece 53a. The switching lever support portion 53b is formed in a tubular (cylindrical) shape.

[0072] As shown in FIGS. 7 and 8, the arm portion 53c extends from the support piece 53a toward the first side plate 36A.

[0073] As shown in Figures 7, 8, and 10, the switching lever 54 is an operating member for switching the operation pattern between a first operation pattern and a second operation pattern. The switching lever 54 has a lever shaft 54A and a lever grip 54B. The lever shaft 54A is formed from a rod material (round bar material) and is inserted into the switching lever support portion 53b so as to be axially movable. The lever grip 54B is provided on the rear (base) side of the lever shaft 54A. A stopper 59 is provided on the tip side of the lever shaft 54A, which abuts against the switching lever support portion 53b to prevent the lever shaft 54A from coming off the switching lever support portion 53b.

[0074] 7, 8, and 10, the interlocking mechanism 55 has a first link 55A and a second link 55B. One end of the first link 55A is pivotally connected to the left end of the arm portion 53c of the swing arm 53 via a first pivot 62A. One end of the second link 55B is fixed to the upper surface of the valve body 42b with a bolt 63. The other end of the first link 55A and the other end of the second link 55B are pivotally connected to each other via the second pivot 62B.

[0075] As shown in Figures 7, 8, and 10, the abutment member 49 is disposed at the upper rear of the right side surface of the vertical wall 47b of the valve bracket 47. The abutment member 49 is formed of a rod (round bar) and has a first portion 49a and a second portion 49b. The first portion 49a is fixed to the right side surface of the vertical wall 47b and extends in the aircraft width direction (to the right from the vertical wall 47b). The second portion 49b extends upward from the right end of the first portion 49a. The gap between the second portion 49b and the vertical wall 47b is formed to allow the lever shaft 54A of the switching lever 54 to pass through.

[0076] As shown in FIGS. 9, 10, and 11, the operation console 20 has an opening 64 formed in the cover member 37 at a position corresponding to the pattern switching device 41, and a lid member 65 that opens and closes the opening 64. In this embodiment, as shown in FIG. 3, the opening 64 and the lid member 65 are provided in the upper left portion of the back surface (on the driver's seat 5 side) of the cover member 37. The lower portion of the lid member 65 is supported by a support portion 66 so as to be rotatable about the axis of a support shaft 67 extending in the width direction of the machine body, and in the closed state, the upper portion is held in the closed state by a fixing member 68 that is screwed to the cover member 37 side. Therefore, as shown by the two-dot chain line in FIG. 12, by removing the fixing member 68, the lid member 65 rotates downward to open the opening 64.

[0077] 10, when the operation pattern of the pattern switching device 41 is switched to the first operation pattern, the switching lever 54 is in a first operation position 70A where it extends in the front-to-rear direction. In the first operation position 70A, the switching lever 54 can be moved between a drawn-out state (first drawn-out state) 71A where the switching lever 54 is pulled rearward to a position where the stopper 59 abuts against the switching lever support portion 53b, as shown by the solid line in Fig. 10, and a stored state (first stored state) 72A where the switching lever 54 is pushed forward to a position where the lever grip 54B abuts against the switching lever support portion 53b, as shown by the two-dot chain line in Fig. 10.

[0078] As shown in FIGS. 10 and 12, the switching lever 54 protrudes from the opening 64 in the first drawn-out state 71A. This allows for easy switching of the operation pattern (lever operation). Also, as shown in FIG. 10, the switching lever 54 is housed inside the lid member 65 (inside the cover member 37) in the first stored state 72A. This prevents the switching lever 54 from getting in the way when the operator gets on or off the work machine 1 or when operating the operating members attached to the operation console 20. Also, in the first stored state 72A, the switching lever 54 passes between the second portion 49b of the abutting member 49 and the vertical wall 47b, and the tip of the switching lever 54 is located forward of the abutting member 49.

[0079] 10, the arm portion 53c extends leftward from the pivot shaft 52, the first link 55A is inclined to the right as it moves forward, and the second link 55B protrudes leftward from the valve body 42b (extending in the aircraft body width direction). The abutment portion 51 abuts against the first restriction portion 50A from the right.

[0080] 10, when the switching lever 54 is swung leftward about the axis of the pivot shaft 52 to the position indicated by the two-dot chain line X1 (second operating position 70B), the arm portion 53c swings forward about the axis of the pivot shaft 52 and pushes the first link 55A forward, as shown in FIG. 11. Then, the first link 55A pushes the other end of the second link 55B forward, causing the valve body 42b to rotate clockwise. When the abutting portion 51 abuts against the second restricting portion 50B from the front, the rotation of the valve body 42b, the swinging of the swing arm 53, and the swinging of the switching lever 54 are restricted. This causes the operation pattern to be switched from the first operation pattern to the second operation pattern.

[0081] 11, when the operation pattern is switched to the second operation pattern, the pattern switching device 41 is in a second operation position 70B extending in an inclined direction shifting to the right as the switching lever 54 moves forward. In the second operation position 70B, the switching lever 54 is movable between a drawn-out state (second drawn-out state) 71B in which the switching lever 54 is pulled rearward to a position where the stopper 59 abuts against the switching lever support portion 53b, as shown by the solid line in Fig. 11, and a stored state (second stored state) 72B in which the switching lever 54 is pushed forward to a position where the lever grip 54B abuts against the switching lever support portion 53b, as shown by the two-dot chain line in Fig. 11.

[0082] As shown in Figures 11 and 12, the switching lever 54 protrudes from the opening 64 in the second drawn-out state 71B. This allows for easy switching of the operation pattern (lever operation). Also, as shown in Figure 11, the switching lever 54 is housed inside the lid member 65 (inside the cover member 37) in the second stored state 72B. This means that the switching lever 54 does not get in the way when the operator gets on or off the work machine 1 or when operating the operating members attached to the operation console 20. Also, in the second stored state 72B, the tip side of the switching lever 54 is located to the right of the second portion 49b of the abutment member 49.

[0083] Furthermore, when the switching lever 54 is swung leftward around the axis of the pivot shaft 52 from the state shown in Figure 11 to the first operating position 70A shown by the two-dot chain line, the operating pattern is switched from the second operating pattern to the first operating pattern.

[0084] Note that the switching between the first operation pattern and the second operation pattern is not performed when the switching lever 54 is positioned at the first operation position 70A or the second operation position 70B, but is performed before the switching lever 54 reaches the first operation position 70A or the second operation position 70B. In other words, when the switching lever 54 is swung from the first operation position 70A to the second operation position 70B, the operation pattern is switched to the second operation pattern before the switching lever 54 reaches the second operation position 70B, and when the switching lever 54 is swung from the second operation position 70B to the first operation position 70A, the operation pattern is switched to the first operation pattern before the switching lever 54 reaches the first operation position 70A.

[0085] As shown in Figure 13, when the switching lever 54 is in the first operating position 70A or the second operating position 70B, the switching lever 54 does not come into contact with the abutment member 49 (second portion 49b) even when the switching lever 54 is in the stored state (first stored state 72A, second stored state 72B). However, when the switching lever 54 is moved in a direction 74 from the pulled-out state toward the stored state within an operating range 73 between the first operating position 70A and the second operating position 70B (closer to the second operating position 70B than the first operating position 70A and closer to the first operating position 70A than the second operating position 70B), the switching lever 54 comes into contact with the abutment member 49 (second portion 49b) while protruding from the opening 64, thereby preventing the switching lever 54 from moving. Therefore, when the switching lever 54 is in a position between the first operating position 70A and the second operating position 70B, the switching lever 54 does not enter the stored state, and the lid member 65 cannot be closed. In other words, when the operation pattern is being switched, the switching lever 54 cannot be stored inside the cover member 37, and the lid member 65 cannot be closed, which allows the operator to recognize that the operation pattern is being switched.

[0086] 14 and 15 show another embodiment of the pattern switching device 41. In FIG.

[0087] The pattern switching device 41 of this other embodiment essentially differs from the above-described embodiment in that the switching lever 54 is detachable from the switching lever support portion 53b, and the other configurations are configured in the same manner as the above-described embodiment.

[0088] Specifically, the switching lever support portion 53b is formed in a rectangular block shape, and has a screw hole 75 (a hole with an internal thread on its inner circumferential surface) formed therein. A male screw portion 76 (a portion with an external thread on its outer circumferential surface) is formed at the tip side of the switching lever 54. The switching lever 54 can be attached to the switching lever support portion 53b by screwing the male screw portion 76 into the screw hole 75. When the switching lever 54 is attached to the switching lever support portion 53b, the switching lever 54 protrudes from the opening 64. Furthermore, by rotating the switching lever 54 in a direction that loosens the screw, the switching lever 54 can be removed from the switching lever support portion 53b, and the opening 64 can be closed with the lid member 65. In this case, for example, a holding portion for holding the switching lever 54 is provided on the cover member 37 or the like.

[0089] The work machine 1 of this embodiment is a work machine 1 equipped with multiple hydraulic actuators (swing motor M1, boom cylinder 15, arm cylinder 16, bucket cylinder 17), and comprises a machine body 2, a driver's seat 5 mounted on the machine body 2, an operation console 20 erected on the machine body 2 in front of the driver's seat 5, a control member 31 for operating the multiple hydraulic actuators, and a pattern switching device 41 for switching the operation pattern of the control member 31 for the multiple hydraulic actuators among multiple operation patterns, and the operation console 20 has a switching device arrangement section 46 in which the pattern switching device 41 is arranged inside.

[0090] According to this configuration, even in a small-sized work machine 1, a place for arranging the pattern switching device 41 can be secured.

[0091] The work machine 1 also includes a traveling device 3 that supports the machine body 2 so that it can travel, and a traveling lever 22 that is provided approximately in the center of the machine body width direction on the top of the operation console 20 and operates the traveling device 3. The operation console 20 has a support frame 36 that is attached to the machine body 2, a cover member 37 that covers the support frame 36, and a traveling lever support part 38 that is provided on the top of the support frame 36 and supports the traveling lever 22. The switching device arrangement part 46 is provided inside the cover member 37 to the side of the traveling lever support part 38 in the machine body width direction and on the top of the support frame 36.

[0092] According to this configuration, a place for arranging the pattern switching device 41 inside the operation console 20 can be secured.

[0093] The work machine 1 also has a control valve 23 including a plurality of control valves (a swing control valve V2, an arm control valve V3, a bucket control valve V9, and a boom control valve V10) that control a plurality of hydraulic actuators. The support frame 36 has a first side plate 36A and a second side plate 36B that are arranged opposite each other and spaced apart in the width direction of the machine body, and a connecting plate 36C that connects the upper parts of the first side plate 36A and the second side plate 36B. The control valve 23 is arranged below the connecting plate 36C and between the first side plate 36A and the second side plate 36B. The travel lever support part 38 is provided on the connecting plate 36C in approximately the center in the width direction of the machine body. The switching device arrangement part 46 is provided on the connecting plate 36C between the travel lever support part 38 and the first side plate 36A or the second side plate 36B.

[0094] This configuration makes it easy to route the hydraulic hoses connecting the pattern switching device 41 and the control valves.

[0095] The operation console 20 also has an opening 64 formed in the cover member 37 at a position corresponding to the pattern switching device 41, and a lid member 65 for opening and closing the opening 64, and the multiple operation patterns include a first operation pattern and a second operation pattern which is an operation pattern different from the first operation pattern, and the pattern switching device 41 has a switching lever 54 which can be swung between a first operation position 70A for switching the operation pattern to the first operation pattern and a second operation position 70B for switching the operation pattern to the second operation pattern, and the switching lever 54 can be moved between a drawn-out state (first drawn-out state 71A, second drawn-out state 71B) in which it protrudes from the opening 64 and a stored state (first stored state 72A, second stored state 72B) in which it is stored inside the lid member 65 at each of the first operation position 70A and the second operation position 70B.

[0096] According to this configuration, the pattern switching device 41 arranged on the cover member 37 can be easily operated, and after switching the operation pattern, the switching lever 54 can be prevented from getting in the way.

[0097] The work machine 1 is equipped with a plurality of hydraulic actuators (swing motor M1, boom cylinder 15, arm cylinder 16, bucket cylinder 17), and includes a machine body 2, a cover member 37 attached to the machine body 2, a control member 31 for operating the plurality of hydraulic actuators, and a pattern switching device 41 for switching the operation pattern of the plurality of hydraulic actuators of the control member 31 into a plurality of operation patterns, the pattern switching device 41 being housed inside the cover member 37, and the cover member 37 has an opening 64 formed at a position corresponding to the pattern switching device 41, and The opening 64 has a cover member 65 that closes the opening 64, and the multiple operation patterns include a first operation pattern and a second operation pattern. The pattern switching device 41 has a switching lever 54 that can be swung to a first operation position 70A that switches the operation pattern to the first operation pattern and a second operation position 70B that switches the operation pattern to the second operation pattern. The switching lever 54 is movable between a drawn-out state (first drawn-out state 71A, second drawn-out state 71B) in which it protrudes from the opening 64 and a stored state (first stored state 72A, second stored state 72B) in which it fits inside the cover member 65, at each of the first operation position 70A and the second operation position 70B.

[0098] According to this configuration, the pattern switching device 41 arranged on the cover member 37 can be easily operated, and after switching the operation pattern, the switching lever 54 can be prevented from getting in the way.

[0099] The work machine 1 also has an abutment member 49 that abuts against the switching lever 54 in a state where the switching lever 54 protrudes from the opening 64 and prevents the switching lever 54 from moving when the switching lever 54 is moved in a direction 74 from the drawn-out state to the stored state within an operating range 73 between the first operating position 70A and the second operating position 70B.

[0100] According to this configuration, when the operation pattern is being switched, the switching lever 54 cannot be stored inside the cover member 37 and the lid member 65 cannot be closed, so the operator can be made aware that the operation pattern is being switched.

[0101] The work machine 1 also includes a plurality of control valves that are provided in correspondence with the plurality of hydraulic actuators to control the plurality of hydraulic actuators and are pilot-operated by an operating member 31, and the pattern switching device 41 includes a pattern switching valve 42 that switches the operation pattern by switching the direction of the flow of pilot oil that pilot-operates the control valve with the operating member 31, a pivot shaft 52 that serves as a pivot point for the switching lever 54, a swing arm 53 that is supported rotatably around the pivot shaft 52 and has a switching lever support portion 53b that supports the switching lever 54 so that it can move between a drawn-out state and a stored state, and an interlocking mechanism 55 that interlocks and connects the swing arm 53 and the valve body 42b of the pattern switching valve 42.

[0102] According to this configuration, the operating mechanism for operating the pattern switching valve 42 can be configured simply.

[0103] Although one embodiment of the present invention has been described above, the embodiment disclosed herein should be considered to be illustrative in all respects and not restrictive. The scope of the present invention is defined by the claims, not by the above description, and is intended to include all modifications within the meaning and scope of the claims. [Explanation of symbols]

[0104] 2 aircraft 3 Running gear 5 Driver's seat 15 Hydraulic actuator (boom cylinder) 16 Hydraulic actuator (arm cylinder) 17 Hydraulic actuator (bucket cylinder) 20 Control console 22 Travel lever 23 Control valve 31 Control components 36 Support frame 36A 1st side plate 36B 2nd side plate 36C connection plate 37 Cover member 38 Travel lever support 41 Pattern switching device 42 Pattern switching valve 42b Valve body 46 Switching device placement section 49 Contact member 52 Rotation spindle 53 Swing arm 53b Switch lever support part 54 Switching lever 55 Interlocking mechanism 64 Opening 65 Lid member 70A 1st operating position 70B 2nd operating position 71A Drawer state (first drawer state) 71B Drawer state (second drawer state) 72A Storage state (first storage state) 72B storage state (second storage state) 73 Operation Range 74 directions M1 Hydraulic actuator (swing motor) V2 control valve (swing control valve) V3 control valve (arm control valve) V9 Control valve (bucket control valve) V10 Control valve (Boom control valve)

Claims

1. A work machine equipped with a plurality of hydraulic actuators, The aircraft and a driver's seat mounted on the aircraft; an operation console provided upright on the aircraft body in front of the driver's seat; a control member for operating the plurality of hydraulic actuators; a pattern switching device that switches an operation pattern of the control member with respect to the plurality of hydraulic actuators among a plurality of operation patterns; Equipped with the operation console has an internal switching device placement section for placing the pattern switching device, and an external opening formed at a position corresponding to the pattern switching device and a cover member for opening and closing the opening, The pattern switching device is a switching lever that can be swiveled to switch the operation pattern, and is a work machine having a switching lever that can be moved between a drawn-out state in which it protrudes from the opening and a stored state in which it fits inside the cover member.

2. A work machine equipped with a plurality of hydraulic actuators, The aircraft and a traveling device that supports the machine body so that it can travel; a driver's seat mounted on the aircraft; an operation console provided upright on the aircraft body in front of the driver's seat; a travel lever provided at approximately the center of the upper part of the operation console in the width direction of the machine body and for operating the travel device; a control member for operating the plurality of hydraulic actuators; a pattern switching device that switches an operation pattern of the control member with respect to the plurality of hydraulic actuators among a plurality of operation patterns; Equipped with the operation console includes a support frame attached to the machine body, a cover member that covers the support frame, and a travel lever support portion that is provided on an upper portion of the support frame and supports the travel lever, Furthermore, the operation console has a switching device placement unit in which the pattern switching device is placed, The switching device arrangement portion is provided inside the cover member, to the side of the travel lever support portion in the machine body width direction, and above the support frame.

3. a control valve including a plurality of control valves for controlling the plurality of hydraulic actuators; the support frame includes a first side plate and a second side plate that are arranged opposite each other and spaced apart in the width direction of the aircraft body, and a connecting plate that connects upper portions of the first side plate and the second side plate, the control valve is disposed below the connecting plate and between the first side plate and the second side plate, the travel lever support portion is provided on the connecting plate at a substantially central portion in the width direction of the machine body, The work machine according to claim 2, wherein the switching device arrangement portion is provided on the connecting plate between the travel lever support portion and the first side plate or the second side plate.

4. the operation console has an opening formed in the cover member at a position corresponding to the pattern switching device, and a lid member that opens and closes the opening, the plurality of operation patterns include a first operation pattern and a second operation pattern that is an operation pattern different from the first operation pattern, the pattern switching device has a switching lever that can be pivoted between a first operation position at which the operation pattern is switched to the first operation pattern and a second operation position at which the operation pattern is switched to the second operation pattern, The work machine according to claim 2, wherein the switching lever is movable between a drawn-out state in which it protrudes from the opening and a stored state in which it fits inside the cover member at each of the first operating position and the second operating position.

5. A work machine equipped with a plurality of hydraulic actuators, The aircraft and a cover member attached to the airframe; a control member for operating the plurality of hydraulic actuators; a pattern switching device that switches an operation pattern of the control member for the plurality of hydraulic actuators among a plurality of operation patterns, the pattern switching device being accommodated inside the cover member; Equipped with the cover member has an opening formed at a position corresponding to the pattern switching device, and a lid member that opens and closes the opening, the plurality of operation patterns include a first operation pattern and a second operation pattern, the pattern switching device has a switching lever that can be pivoted between a first operation position at which the operation pattern is switched to the first operation pattern and a second operation position at which the operation pattern is switched to the second operation pattern, The switching lever is a work machine that can be moved between a drawn-out state in which it protrudes from the opening and a stored state in which it fits inside the cover member at each of the first operating position and the second operating position.

6. 6. A work machine as described in claim 4 or 5, further comprising an abutment member that abuts against the switching lever in a protruding state from the opening and prevents the movement of the switching lever when the switching lever is moved in the direction from the pulled-out state to the stored state within an operating range between the first operating position and the second operating position.

7. a plurality of control valves provided corresponding to the plurality of hydraulic actuators to control the plurality of hydraulic actuators, the control valves being pilot-operated by the operation member; The pattern switching device a pattern switching valve that switches the operation pattern by switching the direction of a flow of pilot oil that pilot-operates the control valve with the operation member; and a pivot shaft that serves as a pivot point for the switching lever; a swing arm that is rotatably supported about the pivot shaft and has a switching lever support portion that supports the switching lever so that the switching lever can move between the extended state and the stored state; 6. The work machine according to claim 4, further comprising a linkage mechanism for linking the swing arm and the valve body of the pattern changeover valve.

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