JP2003011858A - Machinery for plant husbandry - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain parts commonization and easily realize it, in specification of a transmission case, a running transmitting case, etc. SOLUTION: A constitution is provided such that power from an engine is transmitted to a transmission case 3, to input power from an output shaft 35 for running of this transmission case 3 into a running transmitting case 8, to drive an axle journaled to this running transmitting case 8, and to drive a one or two-wheel running wheel rotated, a space 3b passing the machine body right/left center CL to open the downward and the sideward is formed in a lower part of the transmission case 3, a two-wheel machinery for plant husbandry is constituted by connecting the running transmitting case 8 directly to this space 3b, and one-wheel machinery for plant husbandry is constituted by connecting the running transmitting case to this space through a connection member 45.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mission case of a management machine that can be used for both one-wheel and two-wheel traveling wheels, and
The present invention relates to a structure of a traveling transmission case that transmits drive from the transmission case to traveling wheels.

[0002]

2. Description of the Related Art A conventional walk-type control machine transmits power from an engine to a mission case and works on a rotary tiller or the like arranged behind a PTO shaft protruding laterally from the mission case via a chain or the like. In addition to driving power by driving the machine, the drive is input to a traveling transmission case arranged on the side of the transmission case to transmit the power to an axle mounted on the lower portion of the traveling transmission case to enable traveling. Things are common. In such a management machine, a one-wheel management machine including one traveling wheel on the axle,
It is roughly divided into a two-wheel management machine equipped with two running wheels,
Due to the difference in the number of traveling wheels between the two, the specifications (structure) of the mission case, the traveling transmission case, etc. are made different, and the traveling wheels are arranged at the "appropriate position" so that the traveling balance is good. I have to. Here, “arranging at an“ appropriate position ”means arranging so that the center of the rim width of the traveling wheels is aligned with the center CL of the body width in the one-wheel management machine in the front view of the machine body (the same in the rear view). Therefore, in the two-wheel management machine, the rim widths of the wheels are arranged so that the centers of the rim widths of the wheels are located at positions that are evenly spaced from the machine body width center CL in the left and right directions.

[0003]

However, if there is a difference in specifications as described above, for the manufacturer of the control machine, in the manufacture of the one-wheel control machine and the two-wheel control machine,
Since it is not possible to apply common parts (common parts), it hinders the reduction of manufacturing cost and hinders slim parts management (maintenance of parts management). Therefore, improvement is desired. Therefore, in view of the above problems, it is an object of the present invention to achieve commonality of parts in specifications of a mission case, a travel transmission case, and the like, and to easily realize the commonality. .

[0004]

The problem to be solved by the present invention is as described above, and the means for solving this problem will be described below. That is, as described in claim 1,
The power from the engine is transmitted to the mission case, the power is input from the traveling output shaft of the mission case into the traveling transmission case, and the axle shaft-supported by the traveling transmission case is driven to drive one or two traveling wheels. It is configured to rotate, and a space is formed in the lower part of the mission case, which opens downward and laterally, passing through the center of the fuselage left and right, and a travel transmission case is directly connected to the space to provide a two-wheel management machine and the space. The one-wheel management machine is formed by connecting the traveling transmission cases via the connecting member.

Further, as described in claim 2, the power from the engine is transmitted to the transmission case, the power is input from the traveling output shaft of the transmission case into the traveling transmission case, and is axially supported by the traveling transmission case. A structure for driving one or two traveling wheels to rotate by driving an axle, and forming a space at the lower part of the transmission case, which opens downward and laterally, passing through the lateral center of the machine body, and The boss is fixed on the upper side and the traveling transmission case can be changed to the one-wheel management machine and the two-wheel management machine by reversing and replacing the case.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the accompanying drawings. 1 is a side view of a management machine to which the present invention is applied, FIG. 2 is a rear cross-sectional view of a mission case, FIG. 3 is a partial rear view showing a configuration of a mission case and the like in a single wheel management machine, and FIG. FIG. 5 is a partial rear view of a one-wheel management machine showing another embodiment, FIG. 6 is a partial rear view of a two-wheel management machine, and FIG. It is a partial rear view of the one-wheel / two-wheel management machine when configured.

First, the overall structure of the management machine 1 will be described with reference to FIG. 1. The management machine 1 has an engine 2 at the front, a rotary tiller 4 as a working machine at the rear, and a mission case 3 at the center. 2 is mounted and fixed on an engine base 5, and the rear part of the engine base 5 is a mission case 3
It is fixed to. Pulleys are fixed to the output shaft 6 of the engine 2 and the input shaft 7 of the transmission case 3, respectively, so that power is transmitted via a belt. A belt tension type main clutch 10 is arranged between the output shaft 6 and the input shaft 7, and a main clutch lever 25 is arranged on a handle 22 so as to be operated. The tension clutch, belt, pulley and the like are covered by a transmission case 9.

On the lower side surface of the mission case 3,
A travel transmission case 8 is provided, an axle 11 is pivotally supported at a lower portion of the travel transmission case 8, and traveling wheels 12 are fixedly mounted on the axle 11 so that the vehicle can be driven to travel. Further, a rotary tiller 4 is arranged behind the mission case 3. The rotary cultivator 4 has a chain case 14 arranged at the center of the left and right, and a PTO input shaft is horizontally mounted on the upper end of the chain case 14 so that power can be transmitted from the PTO shaft 15 to drive the same. Plowing shaft 1
6, a plurality of tillage claws 1 are supported on the shaft of the tillage claw shaft 16.
7 ・ 17 ... have been planted. The cultivating claw 17 ・ 17
The plowing cover 18 is located above and to the side of the turning locus of the tip of.
Are covered by.

A handle base 21 is provided on the upper portion of the mission case 3, and a handle 22 is pivoted on the handle base 21 in the front-rear horizontal direction so that the front-rear transfer is possible. A handle frame 22a is provided at the base of the handle 22, a handle bar 22b is provided at the rear, and an auxiliary shift lever 24 is provided at the front of the handle bar 22b.
The main clutch lever 2 is provided at the rear of the handlebar 22b.
5, the side clutch levers 26, 26, the accelerator lever 27, etc. are arranged. Also, the handle base 2
On the left rear part of 1, a main gear shift lever 31 is projected so that it can be transferred back and forth, and a cultivating gear shift lever 29 is arranged near the right side of the handle base 21.
By operating 9, the tilling speed can be switched between high and low.

Next, the structure of the mission case 3 will be described with reference to FIG. Input case 7 and PT on the mission case 3
The O-axis 15, the sub-transmission shaft 33, the main transmission shaft 34, the traveling output shaft 35, and the fork shafts 36 and 37 are horizontally arranged in parallel in the horizontal direction. One end of the input shaft 7 projects to the left outside of the mission case 3, and an input pulley 40 is fixedly provided outside the mission case 3. The other end of the input shaft 7 has a boss portion 15 formed at one end of the PTO shaft 15.
A is rotatably fitted on the same shaft center via a bearing. A PTO clutch 41 is arranged between the other end of the input shaft 7 and one end of the PTO shaft 15. In other words, the shaft is divided into left and right parts, and the PTO clutch 41 is arranged in the divided part.

The PTO clutch 41 is capable of transmitting power by engaging a clutch tooth 42 provided on the input shaft 7 with a tooth portion of a slider 43 slidably arranged on the boss portion 15a. However, the PTO clutch 41 can be configured by a multi-plate clutch, a dog type, or the like. Thus, by disposing the input shaft 7 and the PTO shaft 15 on the same axis, the number of shafts can be reduced and the mission case can be made compact.

On the input shaft 7, the first speed gear 5
The first and second speed gears 52, the transmission gear 50 (the third speed gear 53 is integrally provided), and the reverse speed gear 54 are rotatably supported, and the reduction gear 55 is fixed so as not to be relatively rotatable. . Further, a high speed gear 56 and a low speed gear 57, which also serve as counter gears for reverse speed, are rotatably fitted onto the auxiliary transmission shaft 33, the high speed gear 56 is constantly meshed with the reverse speed gear 54, and the low speed gear 57 is It constantly meshes with the transmission gear 50. Further, a slider 59 is slidably spline-fitted on the auxiliary transmission shaft 33 between the high speed gear 56 and the low speed gear 57.

A shift fork (not shown) is fitted to the slider 59 and serves as a sub-transmission mechanism for the main transmission lever 31.
The slider 59 is slid by the rotation of (FIG. 1), and the tooth portion 59a provided on the slider 59 is meshed with the tooth portion 56a provided on the high speed gear 56 to increase the speed, and the tooth portion provided on the slider 59 is increased. By engaging 59b with the low speed gear 57, a low speed is achieved and high and low gear shifting is possible. Further, the reduction gear 5 is provided on the auxiliary transmission shaft 33.
8 is fixed, and is constantly meshed with the reduction gear 55,
The power from the engine 2 is decelerated and transmitted to the auxiliary transmission shaft 33.

A sliding gear 61 is mounted on the main transmission shaft 34.
62 is slidably fitted with a spline,
A shift fork (not shown) is fitted to form a main transmission mechanism, and the sliding gear 61 is slid to the left to move the first speed gear 51.
The state of being in mesh with is defined as the first forward stage and the second forward stage. Similarly, when the sliding gear 61 is slid to the right and meshes with the high speed gear 56, the first and second reverse gears are set, and the sliding gear 62 is slid to the left and meshed with the second gear 52. When the sliding gear 62 is slid to the right and meshes with the third speed gear 53, there are three forward gears and five forward gears, and four forward gears and six forward gears.

In such a structure, the structure of power transmission from the input shaft 7 to the main transmission shaft 34 will be described. First, in the case of one forward speed, the input shaft 7 → reduction gear 55 →
The power is transmitted in the order of the reduction gear 58 → the auxiliary transmission shaft 33 → the slider 59 → the low speed gear 57 → the transmission gear 50 → the first speed gear 51 → the sliding gear 61 → the main transmission shaft 34.
Next, in the case of the reverse first gear, the input shaft 7 → the reduction gear 55 → the reduction gear 58 → the auxiliary transmission shaft 33 → the slider 59 → the low speed gear 5
It is configured such that power is transmitted in the order of 7 → transmission gear 50 → reverse speed gear 54 → high speed gear 56 → sliding gear 61 → main transmission shaft 34. At this time, the high speed gear 56 is a reverse gear. In case of 3 forward gears, input shaft 7 → reduction gear 55 →
The power is transmitted in the order of the reduction gear 58, the auxiliary transmission shaft 33, the slider 59, the low speed gear 57, the transmission gear 50, the second speed gear 52, the sliding gear 62, and the main transmission shaft 34.
In the case of four forward gears, the input shaft 7 → reduction gear 55 → reduction gear 58 → sub transmission shaft 33 → slider 59 → low speed gear 57 → transmission gear 50 → third speed gear 53 → sliding gear 62 → main transmission shaft 3
Power is transmitted in the order of 4.

In the case of two forward gears, the input shaft 7 → reduction gear 5
5 → reduction gear 58 → sub-transmission shaft 33 → slider 59 → high speed gear 56 → reverse speed gear 54 → first speed gear 51 → sliding gear 6
The power is transmitted in the order of 1 → main transmission shaft 34. In the case of two reverse gears, the input shaft 7 → the reduction gear 55 → the reduction gear 58 → the auxiliary transmission shaft 33 → the slider 59 → the high speed gear 5
The power is transmitted in the order of 6 → sliding gear 61 → main transmission shaft 34. In the case of 5 forward gears, the input shaft 7 → reduction gear 55 → reduction gear 58 → subtransmission shaft 33 → slider 5
The power is transmitted in the order of 9 → high speed gear 56 → reverse speed gear 54 → second speed gear 52 → sliding gear 62 → main transmission shaft 34. In the case of 6 forward gears, the input shaft 7 → reduction gear 55 → reduction gear 58 → subtransmission shaft 33 → slider 59 → high speed gear 56 → reverse speed gear 54 → third speed gear 53 → sliding gear 62 → main transmission shaft 34 The power is transmitted in that order.

The power thus transmitted to the main transmission shaft 34 is transmitted from the transmission gear 81 fixedly mounted on the main transmission shaft 34 to the traveling output shaft 35 via the transmission gear 82, as shown in FIG. Has been. Here, one end of the traveling output shaft 35 is connected to the brake device 28, while the other end is made to extend laterally from an opening portion 46 formed on one lower side surface of the transmission case 3 to open the opening. It is pivotally supported by a bearing 44 provided in the traveling transmission case 8 connected by the portion 46. Then, the sprocket 83 is provided on the middle of the shaft 48 connected to the traveling output shaft 35 in the traveling transmission case 8.
Is spline-fitted, and power is transmitted to the sprocket 84 (FIG. 1) provided under the traveling transmission case 8 via the chain 85, so that the axle 11 (FIG. 1) can be driven.

A sprocket 91 (FIG. 2) is fixedly mounted on the PTO shaft 15 protruding outward from the mission case 3, and the sprocket 91 and the chain 94 are attached to the sprocket 91.
The power is transmitted to the sprocket 93 provided on the upper part of the chain case 14 (FIG. 1) via the sprocket 93, and the power is further transmitted from the sprocket 93 to the sprocket 95 provided on the lower part of the chain case 14 via the chain 96 to provide the rotary tiller. It is possible to drive the cultivating claw shaft 16 (FIG. 1) of No. 4.

Next, a description will be given of a configuration in which the one-wheel management machine and the two-wheel management machine are changed by replacing one mission case 3 and one travel transmission case 8 with each other. First, as shown in FIG. 2, a protrusion 3a is formed in the lower part of the mission case 3 so as to be eccentric to one side from the left-right center line CL, and a space 3b is formed in the lower part of the mission case 3 to open downward and laterally.
Are formed. Then, the transmission gear 82 is housed in the protruding portion 3a, and the opening portion 4 opened on the side surface of the protruding portion 3a.
6, the output shaft 35 for traveling protrudes toward the center of the machine body. In such a structure, the structure of a single wheel management machine will be described. In the opening 46,
The transmission case 3 and the transmission case 3 are connected to each other via a boss 45, which is a connecting member, and a connecting shaft 49 that extends horizontally inside the boss 45. The boss 45 has a cylindrical shape, one side of which can be connected to the opening 46, and the other side of which can be connected to the connecting portion 47 of the traveling transmission case 8.

Further, the connecting portion 47 has a shape that can be directly connected to the opening 46 without the boss 45. In this way, the configuration without the boss 45 is assumed to be a two-wheel management machine, and the details will be described later.

The shape of the opening 46 of the mission case 3 and the shape of one side of the boss 45 (the side opposite to the mission case 3) are the same, and the shape of the other side of the boss 45 (the side of the mission case 3) is the same. , The connection portion 47 of the traveling transmission case 8
It is preferable that the shapes of the members are the same from the viewpoint of improving the assembling accuracy at the time of assembling, the ease of assembling, and the strength at the time of connection, but the shape of each member is not particularly limited, and one is The connection part is fixed by a bolt or the like so that the other part is inserted and the other part is externally fitted. Alternatively, a flange portion may be formed on both of them, and the flange portions may be opposed to each other and fixed by bolts. Furthermore, in order to reinforce, the reinforcement frame 3 is provided between the mission case 3 and the side surface of the traveling transmission case 8.
It is also possible to adopt a configuration in which the two are connected and fixed.

An embodiment in which the above structure is applied to the one-wheel management machine 1A and the two-wheel management machine 2A will be described with reference to FIGS. 3 and 4. First, FIG. 3 shows that the boss 45 is applied to the one-wheel management machine 1 </ b> A including one traveling wheel 12, and the connecting portion 47 of the traveling transmission case 8 is connected to the opening 46 via the boss 45 and the connecting shaft 49. When connected to
It shows the position of the traveling wheel 12 in the rear view of the machine body with respect to the lateral center of the vehicle body. On the other hand, in FIG. 4, in the two-wheel management machine 2A composed of two traveling wheels, the connecting portion 47 of the traveling transmission case 8 is applied without applying the boss 45 and the connecting shaft 49.
Shows the position of the traveling wheels 12, 12 in the rear view of the machine body with respect to the center CL of the machine body width when the vehicle is directly connected to the opening 46.

Both configurations (one wheel management machine 1A and two wheel management machine 2
Regarding the components of the traveling transmission case 8 in A),
Common ones are applied. Due to the difference in the number of traveling wheels 12, the number of axles 11 and the number of traveling wheels 12 extending from the lower portion of the traveling transmission case 8 are different. Further, in the two-wheel management machine 2A shown in FIG. 4, the sprocket 83 located above the traveling transmission case 8 and the sprocket 84 located below are located in the center CL of the machine body width. Then, the mission case 3 and the traveling transmission case 8
Common components are applied to the components.

Thus, in the configuration of the one-wheel management machine 1A shown in FIG. 3, the traveling wheels 12 are located at the center CL of the machine body, and in the configuration of the two-wheel management machine 2A shown in FIG. 4, the two traveling wheels 12L. The 12Rs are evenly arranged in the left-right direction (front view of the machine body) from the center CL of the machine body width. In this way, the traveling wheels 12 (12L · 12
R) will support the weight of the entire machine at the center CL of the machine width, so the single wheel management machine 1A with good running balance.
It can be configured as a motorcycle management machine 2A. Further, in both configurations of the one-wheel management machine 1A and the two-wheel management machine 2A, only the presence or absence of the boss 45, which is a simple structure, is different, and the other parts have the same structure. It is possible to reduce the manufacturing cost.

Further, as shown above, the "boss 45"
Depending on the presence / absence of the connecting shaft 49, the common traveling transmission case 8 and the like are used to drive the traveling wheels 12 (12) with respect to the body width center CL in both the one-wheel managing machine 1A and the two-wheel managing machine 2A.
The idea that “the position of L · 12R) can be made appropriate” is not limited to the case of being applied to the shape and configuration of the traveling transmission case 8 as shown in FIGS. 3 and 4.
That is, as shown in FIG. 5 and FIG. 6, from the upper traveling transmission case 8A and the lower traveling transmission case 8B, even if the traveling transmission case 8 has a “crank shape” in the rear view, the single wheel management machine 1A. In the two-wheel management machine 2A, depending on whether the boss 45 is applied or not, the traveling wheels 12 are
(12L / 12R) can be set to an appropriate position with respect to the body width center CL.

Further, as shown in FIG. 7, the connecting portions 47 are formed on both the left and right sides of the traveling transmission case 8, and the boss 45 is fixedly attached to the connecting portion 47 on one side, that is, the traveling transmission case 8 is integrally constructed. Alternatively, it is possible to adopt a configuration in which the traveling transmission case 8 is reversed right and left to support both the one-wheel management machine 1A and the two-wheel management machine 2A. In this case, the side opposite to the boss 45 of the traveling transmission case 8 is covered with the lid 38, and when the orientation is changed, the lid 38 is removed and the other connecting portion 47 is closed. The lid 38 can be fixed to the connecting portion 47 with bolts or the like. Further, the traveling output shaft 35 has a length extending into the traveling transmission case 8, the traveling output shaft 35 is configured by a spline, and the sprocket 83 is spline-fitted. It is arranged so that the traveling output shaft 35 can be supported.

[0027]

Since the present invention is configured as described above, it has the following effects. That is, as in claim 1, the power from the engine is transmitted to the mission case, the power is input from the traveling output shaft of the mission case into the traveling transmission case, and the axle shaft-supported by the traveling transmission case is driven. , A configuration in which one or two traveling wheels are rotationally driven, and a space that opens downward and sideways that passes through the left and right center of the airframe is formed in the lower part of the transmission case, and the travel transmission case is directly connected to the space. The two-wheel management machine and the traveling transmission case are connected to the space via a connecting member to form a one-wheel management machine, so that the mission case and the traveling transmission case configuration of the two wheels are maintained without impairing the traveling balance of the one-wheel and two-wheel management machines. It becomes possible to standardize parts.
Further, it is possible to easily correspond to the one-wheel management machine or the two-wheel management machine only by the presence or absence of the connecting member.

According to a second aspect of the present invention, the power from the engine is transmitted to the transmission case, the power is input from the traveling output shaft of the transmission case into the traveling transmission case, and the axle shaft is pivotally supported by the traveling transmission case. It is configured to drive and drive one or two traveling wheels to rotate, and a space is formed in the lower part of the mission case that opens downward and laterally through the lateral center of the airframe and the upper part of the travel transmission case. By fixing the boss to the left and right and reversing the transmission case, it can be changed to a one-wheel management machine and a two-wheel management machine, so that the same balance can be applied to both without affecting the running balance of the one-wheel and two-wheel management machines. The travel transmission case can be applied, and the travel transmission case constituent parts can be shared. Further, it is possible to easily correspond to the one-wheel management machine or the two-wheel management machine only by the presence or absence of the connecting member.

[Brief description of drawings]

FIG. 1 is a side view of a management machine to which the present invention is applied.

FIG. 2 is a rear cross-sectional view of a mission case.

FIG. 3 is a partial rear view showing the configuration of a mission case and the like in the single wheel management machine.

FIG. 4 is a partial rear view of the motorcycle management machine.

FIG. 5 is a partial rear view of the one-wheel management machine showing the other embodiment.

FIG. 6 is a partial rear view of the motorcycle management machine.

FIG. 7 is a partial rear view of the one-wheel / two-wheel management machine when the boss and the traveling transmission case are integrally configured.

[Explanation of symbols]

1A single wheel management machine 3 mission case 8 Travel transmission case 11 axles 12 running wheels 15 PTO axis 35 Output shaft for traveling

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Toshihisa Ina             New Delta, 767 Umena, Mishima City, Shizuoka Prefecture             Industry Co., Ltd. F-term (reference) 2B033 AA06 AB01 AB11

Claims (2)

[Claims] 1. A motive power from an engine is transmitted to a mission case, motive power is input from a traveling output shaft of the mission case into the traveling transmission case, and an axle shaft-supported by the traveling transmission case is driven to drive one wheel or A structure for rotating two traveling wheels, and a space for opening the lower side and the lateral side that passes through the center of the airframe is formed in the lower part of the transmission case, and the traveling transmission case is directly connected to the space to manage the two wheels. A machine, a management machine that is a one-wheel management machine by connecting a traveling transmission case to the space through a connecting member. 2. A motive power from an engine is transmitted to a mission case, the motive power is input from a traveling output shaft of the mission case into the traveling transmission case, and an axle shaft-supported by the traveling transmission case is driven to drive one wheel or It is a structure for driving two traveling wheels to rotate, and a space is formed in the lower part of the transmission case, which opens downward and laterally, passing through the lateral center of the body, and a boss is fixedly provided on the upper part of the traveling transmission case. , A management machine that can be changed to a one-wheel management machine and a two-wheel management machine by reversing the travel transmission case and replacing it.