JP4977075B2 - Operating unit structure of work equipment - Google Patents

Description

In the present invention, the operation unit is configured to be switchable between a closed state in which the engine bonnet covers the upper side of the engine and an open state in which the engine bonnet moves rearwardly outward of the aircraft and opens the upper side of the engine. The operation part structure of the machine .

It is disclosed in Patent Document 1 as a parking brake operating device.

JP-A-6-179355

The first invention includes an engine bonnet that covers the upper side of the engine, a driver seat that is disposed above the engine hood, a control panel that is disposed on the side of the driver seat opposite to the entrance / exit side, A driving part with a driving part floor arranged on the front side of the seat is closed with the engine bonnet covering the upper part of the engine and an open state in which the engine bonnet moves outward and opens the upper part of the engine. And can be switched to
A brake operation tool arranged so as to be positioned in the driving control space in the closed state of the driving unit is attached to the body frame side instead of the driving unit side, and the brake operation tool is left on the body frame side in the state where the brake operation tool is left. The operation unit is configured to be switched from a closed state to an open state .

According to a second invention, in the first invention,
An opening that allows passage of the brake operating tool when the operating unit is switched from the closed state to the open state is formed below the operation panel.

According to a third invention, in the second invention,
A lateral wall plate connected to the operation unit floor is provided below the operation panel, and the opening is formed in the lateral wall plate.

According to a fourth invention, in the third invention,
The opening is formed at a position closer to the operation unit floor than the lower end of the operation panel in the horizontal wall plate.

According to a fifth invention, in any one of the second to fourth inventions,
A lid member that covers the opening is detachably mounted, and when the operation unit is switched from a closed state to an open state, the lid member is removed and the brake operation tool is allowed to pass through the opening. In the closed state of the operation part, the lid member is attached and the opening part is covered with the lid member.
In a sixth aspect based on the fifth aspect,
The lid member is configured to be detachable in the driving control space.

According to a seventh invention, in any one of the first to sixth inventions,
An end opposite to the entrance side of the driving unit floor in the closed state of the driving unit so that the operation panel passes above the brake operation tool when the driving unit is switched from the closed state to the open state. The brake operating tool is arranged in the section.
According to an eighth invention, in any one of the first to seventh inventions,
A parking brake operation device that maintains an on state in which the brake operation tool is depressed and the parking brake device is braked, and the driving unit is closed from the closed state while being maintained in the on state by the parking brake operation device; It is configured to switch to the open state.

Hereinafter, an example of an embodiment of the present invention will be described based on the drawings.
[Overall structure of the combine]
1 to 3 show an example of a working machine , which is a combine harvester for harvesting grains such as rice and wheat, FIG. 1 is an overall side view, and FIG. 2 is an overall plan view. As shown in these drawings, a combine according to an embodiment of the present invention includes an airframe having a crawler traveling device 1, a cutting unit 10 connected to a front portion of an airframe frame 2 of the airframe, and the airframe frame 2 described above. A threshing device 3 and a grain tank 4 mounted side by side in the machine body lateral direction are provided at the rear part, and the grain tank 4 is provided with a screw conveyor 5 for discharging the grain.
The airframe includes the crawler traveling device 1 and the airframe frame 2, the driving unit 20 having the engine bonnet 21 located near the front of the grain tank 4, and the operation located above the engine bonnet 21. And a driving unit 8 having a seat 80.

  As shown in FIGS. 4 and 5, the prime mover 20 includes the engine bonnet 21, an engine cooling radiator 27 disposed inside the fuselage lateral outer end of the engine bonnet 21, and the interior of the engine bonnet 21. The engine 28 is disposed on the inner side in the lateral direction of the airframe than the engine cooling radiator 27, the intake case 29 is connected to the upper part of the rear end side of the engine bonnet 21, and the intake case 29 is provided inside the intake case 29. An air cleaner 30 is provided.

[Structure around the driving section]
As shown in FIGS. 4 to 6, the driving unit 8 includes a driving seat 80, a driving unit floor frame 18 and a control tower 19 disposed in front of the driving seat 80, and an entrance side of the driving unit floor frame 18. And a control panel 26 disposed on the side of the driver seat 80 opposite to the entrance / exit side. The lateral wall 23 partitions the driving cockpit between the engine bonnet 21 in the driving section and the control tower 19 from the outside of the cutting section side, and prevents dust from entering the driving cockpit from the cutting section 10. . The control tower 19 includes an elevating operation lever 17 that performs a steering operation of the airframe and an elevating operation of the cutting unit 10, and an instrument panel 55 that indicates information such as an operating time related to the engine 28. The operation panel 26 includes a transmission lever 40, a threshing clutch lever 56, and a switch panel 57 disposed on the front side of the machine body relative to the transmission lever 40 and the threshing clutch lever 56. The shift lever 40 is operated to swing in the longitudinal direction of the machine body, thereby shifting the hydrostatic continuously variable transmission 43 to drive, stop, and shift the traveling device 1.

As shown in FIGS. 5 and 6, the engine bonnet 21 includes the top plate 22 that covers the upper side of the engine 28 and the engine cooling radiator 27, and the lateral side wall 23 that covers the lateral lateral outer side of the engine 28 and the engine cooling radiator 27. And a front side wall plate 24 covering the front of the engine 28.
As shown in FIGS. 5 and 6, the engine bonnet 21 includes a triangular chamfered plate portion 21 a provided at a corner portion located on the outer side of the vehicle body on the front end side of the engine bonnet. The chamfered plate portion 21a is formed with an inclined outward surface of the corner of the engine bonnet 21 that is desired for the entrance / exit of the engine bonnet 21 so that the upper end of the chamfer plate 21a is located on the inner side of the machine body. is doing.

As shown in FIGS. 6 and 7, the upper end of the body-side column 35 is provided with a connecting portion 34 a formed of a cylindrical body attached to the outside of the rear side of the engine bonnet 21 via a connecting member 34. It is rotatably connected to the part. As a result, the engine bonnet 21 is supported so as to be rotatable around the operating unit opening axis X of the machine body side column 35 that faces the machine body up and down. The operating part opening shaft core X is disposed on the rear side of the body from the engine 28 and on the inward side of the body in the lateral direction of the body formed by the crankshaft end of the engine 28.
That is, as shown in FIGS. 2, 3 and 6, the engine bonnet 21 is rotated and switched to the lateral side of the body around the driving part axis X of the body side column 35 standing on the left rear side of the driver seat 80. It is free. 2 shows a plan view state when the engine bonnet 21 is closed, and FIG. 3 shows a plan view state when the engine bonnet 21 is opened. As shown in these drawings, the engine bonnet 21 is rotated around the driving unit opening axis X, and is positioned on the front side of the fuselage with respect to the driving unit opening axis X to cover the engine 28. The state is switched between a closed state and an open state in which the engine 28 is opened on the rear side of the body relative to the engine 28.

  The frame which comprises the driver | operator's step part seated in the driver's seat 80 is arrange | positioned. That is, as shown in FIGS. 5, 7, and 8, the support frame 87 is provided in a left-right posture from the left front-rear frame 59 toward the right side. The support frame 87 has a short straight portion 87A extending along the left-right direction by a predetermined length from the front-rear frame 59, and a long slant portion 87B facing right rearward from the extending end of the short straight portion 87A. Thus, it is arranged and configured at a predetermined position.

  As shown in FIGS. 5 to 9, a plate-like operation unit floor 88 is stretched on the upper surface of the support frame 87. The plate-like operation unit floor 88 is divided into a front floor plate 88A positioned in front of the support frame 87 and a rear floor plate 88B as a footrest frame positioned rearward of the support frame 87, and the front floor plate 88A is supported. It is supported and fixed to the frame 87 and the like.

An intermediate large portion 88a of the front floor plate 88A has a trapezoidal shape, and this intermediate large portion 88a can be removed, so that the lower inspection of the operation unit 8 can be easily performed. On the other hand, the rear floor plate 88B is attached to the support frame 87 through two left and right hinges 89 so as to be swingable and openable, and can be opened and held in a standing posture.
As shown in FIGS. 5 (a) and 5 (b), a plate-like bracket 88b is erected at the rear end and the left side end of the rear floor plate 88B. The lower end portion of the front side wall plate 24 is configured to be attached.

  As shown in FIGS. 5 to 9, a machine body side receiving frame 92 that receives and supports the supporting frame 87 in a state along the supporting frame 87 is provided below the supporting frame 87. The body-side receiving frame 92 is provided with a mounting bracket 92A, and the bracket 91 formed on the operation unit floor 88 and the mounting bracket 92A can be connected by bolts. As a result, as will be described later, the driving cockpit including the engine bonnet 21 and the like swinging open to the side of the aircraft can be fixed at a predetermined driving work position.

As shown in FIGS. 5 (a) and 5 (b), the lateral side wall 23 is detachably attached to a plate-like bracket 88b raised from the left lateral side end of the rear floor plate 88B via a bolt a. As shown in FIGS. 5A and 5B, a plate-like bracket 88b raised at the rear end of the rear floor plate 88B is detachably attached via a bolt a. Thereby, the side wall 23, the front side wall plate 24, and the chamfered plate portion 21a can be removed.
As will be described later, the lateral side wall 23, the front side wall plate 24, and the chamfered plate portion 21a are removed when the engine bonnet 21 is swung open, and the rear floor plate 88B is shown in FIG. 5 (b), FIG. As shown in FIG. 7, it is held in a standing posture by opening. This is to avoid interference with the engine 28 and the radiator 27.

Next is a description of the relationship between the tread portion 60 and the lateral wall plate 25 to be described later parking brake operating device.
4, 5, as shown in Figures 7-9, the horizontal wall plate 25 is further located on the front side of the lateral side walls 23, Yes opening 25A having a substantially rhombic the middle portion forms, the opening 25A A covering lid member 90 is provided. As shown in FIGS. 4 and 11, the lid member 90 is formed with a long hole 90 a through which an arm rod 62 </ b> A that supports the tread surface portion 60 described later is inserted and the tread operation of the tread surface portion 60 is permitted.
As described above, since the long hole 90a is provided in the lid member 90, the brake operation can be performed without removing the lid member 90 during normal work travel.

FIG. 5 (b), the 7, as shown in FIG. 9, since the opening 25A in the horizontal wall plate 25 is formed, in a state where the tread portion 60 is operated stepping the brake applied position, the opening 25A is pedal shape The tread surface 60 is formed in a size that can be worn through. Thus, simply by removing only the lid member 90, the lateral wall plate 25 without removing, to avoid interference with the tread portion 60 and the lateral front plate 25.

As shown in FIGS. 1 and 2, the operation unit 8 includes a speed change lever 40 as an operation tool provided on the operation panel 26, and a tread surface unit 60 as a brake operation tool provided on the front end side of the operation unit floor 88. It has. As shown in FIG. 7, the shift lever 40 shifts a hydrostatic continuously variable transmission 43 as an operation target device mounted on a transmission case 42 supported on the front end of the machine body frame 2, thereby The crawler traveling device 1 is driven, stopped, and shifted.

  The transmission lever 40 and the hydrostatic continuously variable transmission 43 are linked via a mechanical interlocking mechanism 50, and a detachable engaging means 51 is provided in the middle of the mechanical interlocking mechanism 50. As shown in FIGS. 8 and 9, the engaging means 51 connects the lever-side interlocking member 52 and the member 53 interlocking with the hydrostatic continuously variable transmission 43 into the opening / closing direction of the operating unit 8. It is configured so that it can be engaged and disengaged as it swings.

In the configuration as described above, when the engine bonnet 21 and the like are rotated and retracted to the side of the machine body, the following work mode is taken.
To open the engine bonnet 21 and the like, as shown in FIGS. 5 (a) and 5 (b), the side wall 23, the front side wall plate 24, and the chamfered plate portion 21a surrounding the operation control space are removed, and the operation unit floor is removed. The rear floor plate 88B of 88 is lifted and maintained in a standing posture. Then, the lateral wall plate 25 without removing, removing the lid member 90 is attached to the lateral wall plate 25.

When the rear floor plate 88B is lifted, the connecting portion between the driving unit floor side bracket 91 and the bracket 92A of the fuselage side receiving frame 92 can be visually recognized, the bolts connecting both the brackets 91 and 92A are removed, and the driving unit floor and the fuselage are removed. The linkage with the side receiving frame 92 is released.
Then, as shown in FIG. 6, not only the engine bonnet 21, but also the driver seat 80, and the support structure that supports these components, such as the control tower 19, the operation panel 26, and the like, are opened toward the side of the aircraft. It swings and opens around the axis X.
In this case, although not shown, in order to perform the opening operation smoothly, a guide roller is attached to one of the rear surface of the engine bonnet 21 and the body-side receiving frame 92 or the like.

[Parking brake operation device]
As shown in FIGS. 10 to 14, the parking brake operating device according to the present invention includes a brake operating body 6, a return spring 67 that urges the brake operating body 6 toward the stepping-release posture, and the brake operating body 6. And a cam body 7 that guides the operation, and is configured so that a braking operation and a brake releasing operation of the parking brake device can be performed by depressing with a foot, and as shown in FIG. These pedals are arranged in a state where the treading surface portion 60 for the stepping operation is located on the leftmost side among the pedals.

The brake operation body 6 is connected to a parking brake device (not shown) provided in the mission case 42 via an operation wire 68, and includes a tread surface portion 60 and a cam follower portion 61 for stepping. ing.
The brake operating body 6 includes a main collar portion 62 integrally including the tread surface portion 60, an upper collar portion 63 that is rotatably coupled to the upper end side of the main collar portion 62, and a lower end of the main collar portion 62. A lower collar portion 64 that is connected to the side so as to be relatively rotatable. The upper collar portion 63 and the lower collar portion 64 have an end opposite to the side that is coupled to the main collar portion 62, They extend in directions opposite to each other and in the longitudinal direction of the machine body, that is, toward the side away from the main flange 62.
The left and right sides of the aircraft are attached to brackets (not shown) fixed to the aircraft frame 2 near the ends of the upper flange 63 and the lower flange 64 opposite to the side connected to the main flange 62. Are pivotally connected by horizontal shafts 65 and 66 in the direction, respectively, and four points of the shaft centers p1 and p2 of the horizontal shafts 65 and 66 and the connection points p3 and p4 of the main flange 62 are rotated. A fixed bracket portion that serves as a fulcrum and connects between the horizontal shafts 65 and 66 is a fixed joint, and the main flange portion 62, the upper flange portion 63, and the lower flange portion 64 constitute a movable node. Yes.

The main rod 62 is continuously provided with an arm rod 62A from the vicinity of the lower end thereof toward the laterally outer side (driving unit floor side) in the left-right direction of the machine body, and a stepping operation is performed at the tip of the arm rod 62A. A tread surface portion 60 is formed. The lower collar portion 64 connected to the lower end side of the main collar portion 62 is pivotally supported by the fixed bracket on the front side of the body relative to the main collar portion 62.
Further, the upper flange 63 is formed in a bell crank shape in a side view, and the bent portion is supported by the horizontal shaft 65, and the upper portion of the portion extending from the horizontal shaft 65 portion to the connection point p3 with the main flange 62 is formed. A cam follower portion 61 that is guided by a cam surface 70 of the cam body 7 to be described later is provided at an intermediate position of the flange portion 63. Further, an operation wire 68 for operating the parking brake device (not shown) at a position on the opposite side of the connection point p3 with the main rod 62 across the horizontal shaft 65 portion, A return spring 67 for urging the collar portion 63 toward the non-depressed side, that is, the side where the parking brake device is not braked is connected.

And the part except the tread part 60 of the said upper eaves part 63, the lower eaves part 64, and the said main eaves part 62 is located outside the side front side wall 25 part of the said operation part 8, and the tread part 60 When only a portion of Ude杆62A for supporting the tread portion 60 through the opening 25A of the horizontal wall plate 25 protrudes into the driver steering the space, and is configured to be positioned on the driving unit floor 88 .

As shown in FIGS. 10 to 14, the cam body 7 includes a main cam plate material 71, a sub cam plate material 72, and a bridge plate 73 that connects and fixes the main cam plate material 71 and the sub cam plate material 72. In a state where these are integrated, they are pivotally connected to a fixed part on the airframe side so as to be swingable around a horizontal axis 74.
The main cam plate member 71 is formed with an opening for forming a cam groove outer peripheral edge 71a at the center of the plate member, and the sub cam plate member 72 is configured such that its outer periphery forms a cam groove inner peripheral edge 72a. Therefore, in a state where the sub cam plate 72 is fitted in the opening of the main cam plate 71, the bridge plate 73 forms a relative position between the cam plates 71, 72 so that a cam groove 75 having a predetermined shape is formed therebetween. The cam body 7 is configured by fixing the.

The cam body 7 configured in this way is composed of a cam groove outer peripheral edge 71 a formed by the opening of the central portion of the main cam plate material 71 and a cam groove inner peripheral edge 72 a formed by the outer periphery of the sub cam plate material 72. This cam groove 75 constitutes a cam surface 70 that guides the cam follower portion 61 inserted into the cam groove 75.
As shown in FIG. 13, the cam surface 70 is engaged with the cam follower portion 61 by engaging the cam follower portion 61 with the cut position holding portion a that holds the cam follower portion 61 at the parking brake cut position. When the temporary locking portion b and the brake operation body 6 are stepped on again, the cam follower portion 61 is removed from the temporary locking portion b to allow the brake operation body 6 to return to the non-stepping side. An unlocking guide portion c for guiding the position is formed.

That is, when the brake operating body 6 is in a non-depressed state, the brake operating body 6 is positioned at the cut position holding portion a by the action of the return spring 67 that acts on the upper collar portion 63 of the brake operating body 6, and the operation wire 68 is operated. The parking brake device connected to is operated in a non-operating state, that is, in a cut-off state (see FIGS. 10 and 13).
When the tread surface portion 60 of the brake operating body 6 is stepped on from this state, the cam follower portion 61 reaches the lowest end position d of the stepping side path f of the cam groove 75, and when the foot is released from the tread surface portion 60, the cam follower portion 61 becomes the cam groove. It is guided by the inner peripheral edge 72a and reaches the temporary locking portion b. In this state, the return acting force of the return spring 67 acting on the cam follower portion 61 acts in a direction to be pressed against the cam surface 70 on the cam groove inner peripheral edge 72a side, and the temporary locking portion b is recessed. Then, the horizontal shaft 74, which is the pivot point of the cam body 7, serves as a reaction force receiver, and the parking brake device is maintained in the engaged state (see FIGS. 11 and 13).
When the brake operating body 6 is stepped on again, the cam follower portion 61 located at the temporary locking portion b is pushed downward, and accordingly, the locking release guide formed on the cam groove outer peripheral edge 71a. The cam follower portion 61 is moved to the entrance of the return path r of the cam groove 75 by guiding the portion c (see FIGS. 12 and 13). When the depression of the brake operating body 6 is stopped in this state, the cam follower portion 61 reaches the cut position holding portion a which is the non-depressed position through the return side path r of the cam groove 75.

[Other Embodiment 1]
The specific configuration of the parking brake operation device is not limited to the structure in which the cam follower portion 61 provided in the upper collar portion 63 is engaged with the cam body 7 as described in the best embodiment. The cam body 7 may be engaged with the cam body 7 by providing the cam follower portion 61 on a member 62 or a separately provided member.

[Second embodiment]
The specific configuration of the brake operating body 6 is not limited to the structure using the four-bar rotation mechanism as described in the best embodiment, and for example, by a member with a pedal that swings around a single axis. The brake operation body 6 may be configured, and the cam follower portion 61 may be provided in a part of the brake operation body 6.

[ 3 of another embodiment]
The present invention can be applied to various working machines such as a tractor, a riding rice transplanter, a transporter, and a cargo handling machine in addition to a combine.

Combine side view Overall plan view of combine Top view of the combine with the engine hood open Side view of the driving unit It is a perspective view showing an engine bonnet, (a) shows a state in which the lateral side wall, the front side wall plate, and the chamfered plate portion are attached at predetermined positions, and (b) removes the lateral side wall, the front side wall plate, and the chamfered plate portion, Shows the state where the rear floor board is lifted Top view showing the engine bonnet opened sideways and operated Side view of the engine bonnet showing the state where the side wall plate, front side wall plate, and chamfer plate are removed and the rear floor plate is lifted Longitudinal front view showing a driving brake, a brake interlocking mechanism, a lock mechanism, a speed change lever, and a mechanism for linking the speed change lever and a hydrostatic continuously variable transmission. Longitudinal front view showing a state where the engine bonnet is in the open state Side view showing parking brake operation device Side view showing parking brake operation device Side view showing parking brake operation device Side view showing cam body Sectional view showing cam body and cam follower

2 Airframe frame
8 Driving Department
21 Engine bonnet
25 Horizontal wall board
25A opening (opening)
26 Operation panel
28 Engine 60 Tread (brake operating tool)
80 Driver's seat
88 Driving floor
90 Lid member

Claims (8)

An engine bonnet that covers the top of the engine, a driver seat that is located above the engine hood, a control panel that is located on the side of the driver seat opposite to the entrance / exit, and a front side of the driver seat The operating section with the operating section floor can be switched between a closed state in which the engine bonnet covers the top of the engine and an open state in which the engine bonnet moves outward and opens the top of the engine. And
A brake operation tool arranged so as to be positioned in the driving control space in the closed state of the driving unit is attached to the body frame side instead of the driving unit side, and the brake operation tool is left on the body frame side in the state where the brake operation tool is left. An operating unit structure for a working machine, wherein the operating unit is configured to be switched from a closed state to an open state . The operating unit structure for a working machine according to claim 1 , wherein an opening that allows passage of the brake operating tool when the operating unit is switched from a closed state to an open state is formed below the operation panel . The operating unit structure for a working machine according to claim 2 , further comprising a lateral wall plate continuously provided on the operating unit floor below the operation panel, wherein the opening is formed in the lateral wall plate . The operation part structure of the working machine according to claim 3, wherein the opening is formed at a position closer to the operation part floor than a lower end of the operation panel in the horizontal wall plate. A lid member that covers the opening is detachably mounted, and when the operation unit is switched from a closed state to an open state, the lid member is removed and the brake operation tool is allowed to pass through the opening. The operating unit structure for a working machine according to any one of claims 2 to 4, wherein the lid member is attached in a closed state of the operating unit and the opening is covered with the lid member. The operation part structure of the working machine according to claim 5, wherein the lid member is configured to be detachable in the operation control space. An end opposite to the entrance side of the driving unit floor in the closed state of the driving unit so that the operation panel passes above the brake operation tool when the driving unit is switched from the closed state to the open state. The operation part structure of the working machine according to any one of claims 1 to 6, wherein the brake operating tool is disposed in a part. A parking brake operation device that maintains an on state in which the brake operation tool is depressed and the parking brake device is braked, and the driving unit is closed from the closed state while being maintained in the on state by the parking brake operation device; The operating part structure of the working machine according to any one of claims 1 to 7, wherein the operating part structure is configured to be switched to an open state.

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