JPS606170Y2 - walk-behind reaper - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a walk-behind reaper in which a reaping section and a driving section are arranged before and after a pair of left and right running wheels.

As a conventional reaper of this kind, the Utility Model Publication No. 52-55375
As shown in the publication, the reaping section and the driving section are connected through a body frame, and one traveling wheel is attached to a wheel transmission case that is swingably attached to the body frame, and the power of the driving section is transmitted. The power is transmitted to the wheels and the reaping section via separate power transmission systems, and the wheels are configured to be driven via a stepped transmission mechanism within the wheel transmission case.

In addition, for the two-wheeled type,
As shown in the publication, the wheels are fixedly attached to the machine body on which the reaping section and the driving section are mounted, and the reaping section, the pulling device, and the wheels are connected to each other via separate power transmission systems. The driving force is transmitted.

Each of these conventional devices has the following drawbacks.

First of all, since the former is a unicycle, it is difficult to support the aircraft in wet fields, and although the latter has a slight advantage in this respect, the large ground contact area of the wheels alone cannot prevent the aircraft from sinking. It has the disadvantage that it cannot completely cover the area and prevent sinking of the reaped part, and since it is a stepped transmission based on dry field driving, it cannot run at very low speeds and cannot properly raise the lodging culm. There was a major problem with driving performance in wet fields.

Secondly, in both the former and the latter, the power transmission system to each part is formed by a separate system for each part, and in the latter, each part is separately mounted on a machine frame, so the overall structure of the reaper is However, it had the disadvantage of being complicated and heavy.

Thirdly, the former structure in which the wheels swing up and down to prevent the reaping part from sinking is an advantageous means for wet field work, but this one has a structure in which the wheel transmission case is supported by the machine frame. Therefore, it was inevitable that the aircraft would sink significantly due to the increased weight associated with the use of the aircraft frame.

Therefore, the present invention was devised to eliminate these drawbacks of conventional products.It is a walk-behind reaper that can be expected to improve running performance and work performance in wet fields, simplify the overall structure of the machine, and further reduce its weight. This is what we are trying to provide.

In order to achieve the above objectives, the present invention aims to increase the ground contact area of the wheels, improve the vertical swing structure of the wheel transmission case, improve the speed change, the power transmission system, and rationally connect the fuselage structure enclosure. Specifically, a reaping section and a driving section are arranged before and after a pair of left and right running wheels, and a driving pulley attached to the driving section, an input pulley for the reaping section, a manual pulley for wheels, and a tensioning pulley are connected. A main power transmission belt is wound around the wheel input pulley, and the input pulley for the wheel is composed of a split pulley, and an operating mechanism for displacing the tensioning pulley in the direction of tensioning and relaxing the transmission belt is provided, and the manual power pulley for the wheel is changed in speed. A transmission case for the reaping section, in which an intermediate transmission case is attached to the front reaping section side, and an intermediate transmission case that is operable and equipped with the manual pulley for the reaping section is inserted between the left and right wheels. A wheel transmission case that is connected via a cylindrical frame that also serves as a case and that pivotally supports the left and right wheels is pivotally mounted to be vertically swingable around the axis of the wheel input pulley. A connecting member is constructed and connected between the roadside portion of the wheel transmission case and the cylindrical frame which also serves as the transmission case, and which allows the wheel transmission case to swing only around the axis of the wheel manual pulley.

Therefore, by adopting two wheels and making the vertical position of these wheels changeable by the wheel transmission case, it is possible to increase the supporting force of the aircraft, and to cope with the sinking of the aircraft that cannot be covered by this, by swinging the wheels. By adopting a continuously variable transmission consisting of a pulley that splits the wheel cabooley, it is possible to travel at very low speeds that are easy to run in wet fields, and also to freely set any speed according to the culm lodging situation. It will be done.

In addition, the power is transmitted to the reaping section and the running wheels by one belt, and the manual pulley for one wheel of the pulley that hangs this one belt is a split pulley that transmits the power to the running wheels and changes the speed. In addition, one transmission case placed between the pair of running wheels is also used as a frame for connecting the internal case of the transmission system to the reaping section, the reaping section, and the driving section.

Furthermore, the free end of the wheel transmission case and the transmission case that also serves as the frame are connected by a connecting member that allows the wheel transmission case to swing up and down around its input side axis, resulting in a lightweight frame structure. The fuselage frame can be configured.

The present invention has the structure and operation as described above, and has the following unique effects.

■ By using a two-wheeled vehicle, it is possible to increase the ground contact area compared to a conventional single-wheeled vehicle, and by adopting a swing structure, it can fully cope with large sinking of the machine and keep the reaping part always in a constant position on the mud surface. Furthermore, by making it continuously variable speed, you can drive at very low speed.
The desired speed required by the operator can be easily obtained, and the organic combination of these effects greatly improves running performance and work performance in wet fields to a degree that cannot be expected with conventional structures. There are benefits that can be enhanced.

■ Power is transmitted from the drive pulley to the input pulley for the wheels and the manual pulley for the reaping section using a single belt. One transmission case to the reaping section is arranged between the wheels, and this transmission case is also used as a frame for connecting the reaping section and the driving section. Compared to the case where two belts are used to transmit power to the machine, a stepped transmission mechanism is used to change the speed of the wheels, and a dedicated fuselage frame is used, the overall fuselage is simplified. It has the advantage of greatly promoting weight reduction, and therefore has the advantage of greatly contributing to further improvement of driving performance in wet fields.

■ Connect the free end of the wheel transmission case to the transmission case for the reaping section with a connecting member that allows only the swing of this wheel transmission case, and connect the connecting section and the driving section as well as the wheel transmission case and the reaping section. Since the rectangular body frame is constituted by the transmission case, the body frame is lightweight and does not require a dedicated body frame, yet it can maintain sufficient strength.

Hereinafter, embodiments of the present invention will be described based on the drawings.

In front and behind a pair of left and right running wheels 1, 1 using low-pressure tires for running in wet fields, there are a planted stem culm lifting device 2, a stock base raking device 3, a reaping device 4, and a reaped stem culm lateral feeding device. 5, etc., and is equipped with a binding device 6, and a driving section B, which is composed of an engine 7, a fuel tank 8, an air cleaner 9, etc., are arranged so as to be distributed with respect to each other. In the walk-behind harvester for wet fields, which is constructed to ensure a front-to-rear weight balance, the structure for transmitting power from the driving part B to the reaping part A and the wheels 1 is constructed as follows.

That is, a driving pulley 10, a reaping section manual pulley 11, a wheel manual pulley 12, and a tensioning pulley 13, which are attached to the output shaft of the engine 7, are attached to one side of the engine 7 in the driving section B. These four pulleys 1 are mounted on a shaft in one common transmission case 14 that is connected to each other.
A single transmission belt 15 is wound around the waist of 0.11 and 12.13, and this pulley 11 is pivotally supported on the engine 7 side side surface of the common transmission case 14 at a position corresponding to the manual pulley 11 for the reaping section. An intermediate transmission case 16 is arranged in series, and one end of the intermediate transmission case 16 located at the center of the mechanism, and a reaping section transmission case 17 provided at the upper and lower intermediate portions on the rear end side of the reaping section A, They are connected via a single cylindrical frame 18 which also serves as a transmission case, passing above both the left and right axles 1, 1 in a side view, and between the two axles 1, 1 in a plan view. With the transmission mechanism 19 provided in
The power is transmitted from the input pulley 11 to the reaping section A, and the power is transmitted to each of the devices 2, 3, 4, 5, 6 in the reaping section A. At a position corresponding to 12, a wheel transmission case 20, which is located at the center of the mechanism and has a front-rearward posture, is pivotally connected to the side surface of the engine 7 so that it can swing up and down around the axis of the human-powered wheel pulley 12. The case 20 is configured to transmit power from the input pulley 12 to the pair of wheels 1, 1 which are mounted on both sides near the free end of the case 20 via a transmission chain 29 inside the case 20.

As shown in FIG. 3, the wheel manual pulley 12 is configured as a split pulley consisting of a pair of dish-shaped plates 12a, 12a urged toward each other by compression bullets 21, 21, and the tension pulley 13 is By pressing against and moving away from the transmission belt 15, the transmission belt 15 is tensioned and
By this, the plate-like plates 12a, 12a are separated and
The effective diameter of the pulley 12 relative to the belt 15 is changed steplessly, thereby increasing the rotational speed 6 of the wheels 1, 1.
In other words, the pulley 11 cannot be continuously variable regardless of the operating speed of the reaping section A.

As shown in FIG.
2, an operating lever 24 connected via a wire 23
By manually operating the wire 23 and the arm 22
There is no way to operate the pulley 13 via the

That is, the operating mechanism 26 of the pulley 13 is composed of the arm 22, the wire 23, the lever 24, and the tensioning machine 25 that urges the arm 22 in the separating direction.

The lever 24 is provided on a control handle 27 that is connected to the cylindrical frame 18.

Reference numeral 28 denotes a connecting member for connecting the free end 20a of the wheel transmission case 20 and the cylindrical frame 18. By extending upward and also connecting to the reaping part A, the cylindrical frame 18
It also serves as an auxiliary frame for the wheel transmission case 20.

The free end portion 20a of the wheel transmission case 20 is connected to the connecting member 28 via a pin and a long hole so that it can only swing in an arc around the axis of the manual wheel pulley 12. .

[Brief explanation of drawings]

The drawings show an embodiment of the walk-behind reaper according to the present invention; FIG. 1 is a side view, FIG. 2 is a schematic plan view, and FIG. 3 is a partial sectional view;
FIG. 4 is an operation system diagram. 1... Travel wheel, 10... Driving pulley, 11... Input pulley for reaping section, 12...
...Wheel input pulley 13...Tension pulley 15...Transmission belt, 16...
- Intermediate transmission case, 17... Transmission case for reaping section, 18... Cylindrical frame, 20...
Wheel transmission case, 20a...Free end, 26...
...Operating mechanism, 28...Connection member, A...
...Reaping section, B...Motive force section.

Claims (1)

[Scope of utility model registration request] A reaping section A and a driving section B are located before and after a pair of left and right running wheels 1, 1.
and a driving pulley 10 mounted on the driving section B.
, input pulley 11 for reaping section, manual pulley 12 for wheels
and one transmission belt 15 over the tensioning pulley 13.
The wheel manual pulley 12 is constructed of a split pulley, and an operating mechanism 26 is provided to displace the tensioning pulley 13 in the direction of tensioning and relaxing the transmission belt 15. The reaping section user's cab-IJ-11 is configured such that the speed can be operated.
The intermediate transmission case 16 equipped with the reaping section A and the reaping section transmission case 17 attached to the front reaping section A side are connected to the left and right wheels 1,
The wheel transmission case 20, which is connected via a cylindrical frame 18 which is also used as a transmission case and which is inserted between the wheels 1 and 1, and which pivotally supports the left and right wheels 1, is connected to the shaft center of the manual wheel pulley 12. It is pivotally attached to the surrounding area so that it can swing up and down,
Between the free end 20a of the wheel transmission case 20 and the cylindrical frame 18 which also serves as a transmission case, there is a state in which the wheel transmission case 20 is allowed to swing only around the axis of the wheel input pulley 12. A walk-behind reaping machine characterized in that the continuous members 28 are connected in an erected manner.