JP2023146540A - Walking type work vehicle - Google Patents

Abstract

To achieve smoothness of actuation of a work part at the time of lifting operation in a walking type electric work vehicle having a configuration in which the work part is lifted up and down in an interlocking manner.SOLUTION: Work parts A, B are arranged in front of machine body frames 5, 41, an operation part including operation handles 22, 56 are arranged in rear of the machine frames 5, 41, batteries 33, 61 and work part drive motors 10, 47 are arranged in a lower part of the operation part, and the work parts A, B are configured to transmit power to belts 11, 51. The operation handles 22, 56 are provided in a rearward upper position of the machine frames 5, 41, placement frames 30, 60 are provided in a lower position of the operation handles 22, 56, and the batteries 33, 61 are placed on the placement frames 30, 60.SELECTED DRAWING: Figure 1

Description

The present invention relates to a walking work vehicle, such as a radish harvester, in which a working part is connected to the front of a traveling vehicle body so as to be movable up and down.

A grass mower that is a walking work vehicle is equipped with a reaping part motor, a driving wheel motor, and a cutting height adjustment motor, and a handle is provided toward the rear from the body frame, and an operating part is attached and fixed to the handle, and the operating part There is a known configuration in which batteries for driving each motor linked to each other are installed in the fuselage frame (Patent Document 1).

Japanese Patent Application Publication No. 2001-148922

According to Patent Document 1, since the battery that drives the reaping section motor, drive wheel motor, and cutting height adjustment motor is installed in the machine frame to which the reaping section is attached, the cutting height adjustment motor that adjusts the reaping section up and down is This is to raise and lower the reaping part and the battery, that is, in addition to the work part load, the battery load is linked to the raising and lowering. Therefore, since the heavy battery is moved up and down, its operation is unstable.

An object of the present invention is to smoothly operate a working part that moves up and down.

In order to solve the above problem, the invention according to claim 1 arranges the working parts A and B in front of the fuselage frames 5 and 41, and arranges the control part equipped with the control handles 22 and 56 in the rear. Batteries 33, 61 and working part drive motors 10, 47 are arranged below the control part,
A bracket 13 serving as a fulcrum for vertical movement of the working parts (A, B) and an intermediate shaft rotated through belts 11 and 51 for power transmission by the working part drive motors 10 and 47 are coaxially arranged,
The power from the working part drive motor can be transmitted from a power transmission belt to a belt 19 connected to the intermediate shaft via an intermediate shaft, and the working parts (A, B) are driven through the belt 19. .

The invention according to claim 2 is the invention according to claim 1, in which control handles 22, 56 are provided at rear upper positions of the fuselage frames 5, 41, and a mounting handle is provided at a lower position of the control handles 22, 56. Frames 30, 60 are provided, and batteries 33, 61 are placed on the mounting frames 30, 60.

The invention according to claim 3 is the invention according to claim 2, in which the mounting frames 30, 60 are formed with two stages of upper and lower mounting tables, and the battery management systems 31, 63 and chargers 32, 62 are installed on the upper stage. The batteries 33 and 61 are placed on the lower tier.

According to the first aspect of the invention, since the working parts drive motors 10 and 47 are not disposed in the working parts A and B, the lifting and lowering operations of the working parts A and B can be performed without impairing the balance. Further, the turning operation by raising the working parts A and B is also smooth.

According to the invention set forth in claim 2 or claim 3, in addition to the effects of the invention set forth in claim 1, by arranging heavy objects such as the battery 33 downward, the center of gravity of the aircraft body is lowered, making it easier to perform work. Improves the stability of driving and steering operations. In particular, according to the third aspect of the invention, by arranging the battery-related parts such as the battery management system all together, the overall structure including harnesses can be made compact, and maintainability can be improved.

FIG. 1 is a perspective view of a root vegetable harvester for a walking work vehicle according to an embodiment of the present invention. It is a rear view of the same root vegetable harvesting machine. It is a perspective view of the same root vegetables harvesting machine. (A) A plan view showing an outline of the transmission configuration of the root vegetables harvesting machine, and (B) a perspective view of a part thereof. (A) A perspective view of a mounting frame accommodating a battery and the like of the root vegetable harvester, and (B) a perspective view of a mounting frame provided with hinge means. It is a side view of another example of the root vegetable pulling machine of the same walk-behind work vehicle. It is a perspective view of another example of the root vegetable pulling machine of the walking type work vehicle. It is a perspective view of another example of the root vegetable pulling machine of the walking type work vehicle.

As shown in FIG. 1, the root vegetable harvesting machine 1 as a walking work vehicle has a vertical lifting device 2, left and right horizontal lifting devices 3, 3, and a pulling and conveying device 4 supported on a body frame 5 in order from the front end of the machine. The front and rear of this body frame 5 are supported by left and right auxiliary wheels 6, 6 and left and right drive wheels 7, 7 so as to be able to run in the field. The drive wheels 7, 7 are supported by left and right chain cases 8, 8, which are suspended from the left and right ends of a horizontal frame portion 5a that connects the rear end portions of the fuselage frame 5 on the left and right sides, respectively. , the left and right sides are independently driven by running part drive motors 9, 9 located above each chain case 8, 8.

On the other hand, a working part drive motor 10 is provided on one left and right side of the body frame 5 (on the left side in the illustrated example). This working part drive motor 10 drives the vertical lifting device 2 and the horizontal lifting devices 3, 3 via a transmission belt 11 disposed along one side of the machine body. Specifically, a drive pulley 12 provided on the drive shaft 10a of the work unit drive motor 10, and a driven pulley 15 provided on one side of the first intermediate shaft 14 supported by the left and right brackets 13, 13 on the upper surface of the extraction conveyance device 4. A transmission belt 11 is spanned between the two. The relay pulley 16 provided at the left and right intermediate portions of the first intermediate shaft 14 and the input pulley 18 provided at the input shaft 17 of the lifting devices 2 and 3 are configured to be capable of transmitting the belt 19.

The vertical pulling device 2 is configured to be capable of raking up the stems and leaves hanging down on the ridges on the sides of the crops to be harvested, using an endless belt with lugs 2a and the like that rotate in the direction in which the machine moves.

On the other hand, the left and right horizontal lifting devices 3, 3 are each composed of an endless belt 3a with a lug that moves in the left and right center direction of the machine body, and receives the stems and leaves from the vertical lifting device 2, and also hangs down to the side of the crop. The structure is such that the expanded stems and leaves are pushed up toward the center while being raked up.

An input shaft pipe 21 that covers the input shaft 17 is connected to one side of the brackets 13, 13 (on the right side in the illustrated example) by a support arm 20 that is rotatable coaxially with the first intermediate shaft 14. The pulling devices 2 and 3 are integrally supported by the input shaft pipe 21. Therefore, by pulling back the lifting lever 23 provided on the operating handle 22, the connecting rod 23a is pulled and the lifting devices 2 and 3 can be raised to the non-working position. Conversely, when the lifting lever 23 is operated forward, the pulling operation of the connecting rod 23a is released and the lifting devices 2 and 3 return to their working positions.

The extracting and conveying device 4 is configured to include a cutter (not shown) on a holding belt that slopes upward at the rear, and to collect and hold the foliage and pull up the crop while cutting and discharging the foliage. The transmission belt 11 that spans between the driving pulley 12 and the driven pulley 15 is configured to be able to drive the intermediate pulley 24, and is configured to interlock with the second intermediate shaft 25 that transmits the gripping belt of the pull-out conveyance device 4. Figure 4). It should be noted that it can also be configured to transmit power to a cutter not shown. 26 is a tension pulley.

The auxiliary wheels 6, 6 are configured to be adjustable in support height, and are configured to adjust the height at which root vegetables are pulled out.

The operating handle 22 is provided at a rear upper position of the horizontal frame portion 5a of the body frame 5 at a laterally displaced position. That is, the operating handle 22, which is U-shaped in plan view and whose front portion is bent downward, is attached to the horizontal frame portion 5a via a bracket member 27. A curved auxiliary frame 5b is provided below the horizontal frame portion 5a via the bracket member 27, and a mounting frame 30 constituting a two-tiered mounting table is provided on this auxiliary frame 5b. A battery management system 31 and a charger 32 are placed on the upper stage of the mounting frame 30, and a battery 33 is placed on the lower stage. Note that the configuration is such that the entire battery case 34 can be covered. Note that the battery management system 31 is a known configuration that prevents overcharging of the battery 33 and manages the temperature and remaining capacity of the battery 33.

A traveling part drive motor switch and a working part drive motor switch are provided near the control handle 22 of the control part, and when these switches are turned on, the traveling part drive motor 9 and the working part drive motor 10 are started.

The mounting frame 30 may be opened and closed, as shown in FIG. 5(B). That is, the hinge means 35 is provided with a vertical axis on either the left or right side, and can be opened and closed rearward about the vertical axis, thereby facilitating maintenance such as replacing the battery 33. Note that the hinge means 35, which serves as a pivot point for the mounting frame 30, is arranged on the opposite side from the control section, and the harnesses are arranged around the pivot point. By arranging heavy objects such as the battery 33 below, the center of gravity of the aircraft is lowered, improving the stability of work travel and maneuvering operations. Further, by arranging the battery management system 31 and other battery 33 related parts together, the overall structure including harnesses can be made compact, and maintainability can be improved.

As mentioned above, the working parts A of the vertical lifting device 2 and the horizontal lifting devices 3, 3 are arranged in the front of the fuselage frame 5, the control parts such as the control handle 22 are arranged in the rear, and the control parts such as the control handle 22 are arranged below the control parts. Since the battery 33 and the working part drive motor 10 are arranged and the working part A is configured to be able to transmit the belt 11, the working part drive motor 10 is not arranged in the working part A, so the lifting and lowering movement of the working part A is balanced. can be done without making things worse. Further, the turning operation by raising the working part A is also smooth.

The transmission structure of the drive wheels 7, 7 is based on the chains inside the left and right chain cases 8, 8, respectively, and the traveling part drive motors 9, 9 are arranged facing each other inside the machine body of the left and right chain cases 8, 8, respectively. Drive wheels 7, 7 are provided outside of left and right chain cases 8, 8, respectively. Furthermore, by adding a configuration in which the left and right chain cases 8, 8 can be swapped left and right and attached to the horizontal frame portion 5a, the treads of the drive wheels 7, 7 can be changed and different furrows can be accommodated. In addition, by making the horizontal frame portion 5a into a plurality of divisions and interposing division members (spacers) with different lengths, the tread can be arbitrarily changed, and different ridges can be accommodated.

In addition, it is possible to prepare chain cases 8, 8 with a plurality of different lengths so that the distance between the axis of the traveling part drive motor 9 and the axis of the drive wheel 7 is different, or to divide the chain case into upper and lower parts and to make a plurality of chains. By preparing spacers, the vehicle height can be adjusted to accommodate various crop types and varieties. In addition, the chain cases 8, 8 are equipped with sprockets arranged above and below the chain, but if the sprockets are formed with different diameters and the drive wheels and traveling section drive motor can be installed by flipping them upside down, the reduction ratio Can be with different specifications.

The axle positions of the drive wheels 7, 7 are configured to be rearward of the center of gravity G of the machine, and the axle position of the auxiliary wheel 6 is configured to be forward of the center of gravity G. This ensures stable running.

FIGS. 6 and 7 show different configurations of the fuselage layout. The fuselage frame 41, which is integrally constructed with the pull-out conveyance device 40, can run using the front driving wheels 42, 42 and the rear auxiliary wheels 43, 43. Supported by A working section B consisting of a vertical lifting device 44 and a horizontal lifting device 45 is connected to the front of the body frame 41 via a support arm 46 so as to be movable up and down. Transmission belts 51a and 51b are wound around one side of the body frame 41 to interlock an input pulley 50 of a vertical lifting device 44 via a drive pulley 48 and an intermediate pulley 49, which are interlocked with a working part drive motor 47.

The drive wheels 42, 42 are supported by chain cases 53, 53 suspended from axle frames 52, 52 extending laterally from the body frame 41. Each of the chain cases 53, 53 is provided with a traveling portion drive motor 54, 54. The lower end of a U-shaped control frame 55 is supported at the center of the fuselage frame 41 so as to bypass the upper part of the extraction and conveyance device 40, and the upper side of the control frame 55 is displaced to one side. This is a configuration in which a control handle 56 is attached (FIG. 7).

The auxiliary wheels 43, 43 are provided with an adjustment handle 57, which is vertically adjustable at the center of the base of the support arm 58, so that the height can be adjusted to an appropriate height depending on the growing conditions of the crop.

The working unit B, which can be raised and lowered and is composed of the vertical lifting device 44 and the horizontal lifting device 45, is connected to a handle (not shown) and can be raised to a non-working position or lowered to a working position.

Further, a mounting frame 60 is provided at the rear of the body frame 41, a battery 61 is mounted on the lower stage, and a charger 62 and a battery management system 63 are mounted on the upper stage.

FIG. 8 shows a configuration in which inverters 64 and 65 for changing the rotation speed of the motor are taken out from the battery management system 63 and arranged. By separately providing the left inverter 64 and the right inverter 65, the left and right rotational speeds can be changed, making it possible to perform steering.
Further, the width of the drive wheels 42 and 42 can be changed by changing the arrangement dimensions of the axle frames 66 and 67. Even in this configuration, the configuration can be easily changed by arranging the inverters 64 and 65 nearby.

5 Airframe frame 10 Work part drive motor 11 Belt 22 Control handle 30 Placement frame 31 Battery management system 32 Charger 33 Battery 41 Airframe frame 47 Work part drive motor 51 Belt 56 Control handle 60 Placement frame 61 Battery 62 Charger 63 Battery management system A Working section B Working section

Claims (3)

The working parts (A, B) are arranged in front of the fuselage frame (5, 41), the control part with the control handle (22, 56) is arranged in the rear, and the battery (33, 61) and the working part drive motor (10, 47) are arranged,
A bracket (13) that serves as a fulcrum for vertical movement of the working parts (A, B), and an intermediate shaft (14) that rotates through a power transmission belt (11, 51) by a working part drive motor (10, 47). on the same axis,
The power from the working part drive motor (10, 47) is transmitted from the power transmission belt (11, 51) to the belt (19) connected to the intermediate shaft (14) via the intermediate shaft (14). A walk-behind work vehicle characterized in that the work parts (A, B) are driven through a belt (19). A control handle (22, 56) is provided at the rear upper position of the fuselage frame (5, 41), a mounting frame (30, 60) is provided below the control handle (22, 56), and the mounting frame The walking work vehicle according to claim 1, wherein a battery (33, 61) is mounted on (30, 60). A mounting frame (30, 60) has two stages, upper and lower, where the battery management system (31, 63) and charger (32, 62) are mounted on the upper stage, and the battery (33, 61) is mounted on the lower stage. 3. The walking work vehicle according to claim 2, wherein the walking type work vehicle is provided with:

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