JPH07143801A - Managing implement - Google Patents

Abstract

PURPOSE:To provide a managing implement capable of making a compact machine body width easily, by using a transmission unit capable of being installed by means of a running transmission case at a higher position than that of a wheel shaft. CONSTITUTION:In a managing implement having an engine (2) placed in front of a running transmission case (16) and an extended operating handle behind the running transmission case (16), a variable speed unit case (17) with a hydraulic stepless variable speed mechanism (20) is located over the running transmission case (16), and a sprocket transmission mechanism (25) driving a wheel shaft (5) is installed in the running transmission case (16) under which running wheels (6) are provided through the wheel shaft (5).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a management machine equipped with, for example, a rotary working machine for performing various management works such as plowing work.

[0002]

2. Description of the Related Art Conventionally, as shown in Japanese Utility Model Publication No. 56-2573, an engine is provided in front of a traveling drive case in which traveling wheels are mounted via an axle, and a steering handle is provided at the rear of the traveling drive case. There was a technology to provide a hydraulic transmission unit that transmits to the axle.

[0003]

In the prior art, the hydraulic transmission unit is mounted on the upper surface of the traveling drive case and the output of the hydraulic transmission unit is transmitted to the axle via the transmission gear group. The width cannot be easily reduced and the lateral width of the fuselage cannot be easily made compact, and because the hydraulic transmission unit was placed at a position lower than the upper side of the running wheels, the hydraulic transmission unit could be There were problems such as easy interference with crops.

[0004]

SUMMARY OF THE INVENTION However, the present invention provides a hydraulic continuously variable transmission mechanism in a management machine in which an engine is provided on the front side of a traveling transmission case and a steering handle is extended behind the traveling transmission case. A transmission unit case is provided on the upper side of the travel transmission case, and a sprocket transmission mechanism for driving the axle is internally provided in the travel transmission case in which traveling wheels are mounted on the lower side through the axle. The transmission unit case can be installed at a high position on the axle via the transmission case, and the lateral width of the machine such as the traveling transmission case at the traveling wheel installation position can be reduced more easily than before, and the lateral width of the machine can be made compact. In addition to being easy to carry out, the transmission unit case can be attached to the side of the traveling transmission case to easily shorten the front-rear length of the machine body and the headland turning width to improve traveling performance and Work efficiency in which a may be carried out easily like.

Further, in a management machine in which an engine is provided on the front side of the traveling transmission case and a steering handle is extended behind the traveling transmission case, a transmission unit case having a hydraulic continuously variable transmission mechanism is installed above the upper ends of the traveling wheels. An input pulley for transmitting engine output at a high position and an input pulley for transmitting the engine output and the transmission unit case are arranged at substantially the same height above the traveling transmission case, and are higher than the upper side of the traveling wheels. Since the transmission unit case is arranged at the position, it is possible to easily prevent the transmission unit case from interfering with crops at the time of cultivating work, etc., and the lateral width of the body such as the traveling transmission case at the traveling wheel installation position can be made wider than before. Can be easily reduced, and the lateral width of the airframe can be easily reduced.

Also, the input shaft of the transmission unit case and the output shaft for agricultural work are provided at a position higher than the output shaft for traveling of the transmission unit case, and are connected to the engine and the agricultural work input shaft at the high position where the transmission unit case is provided. The structure can be configured in a centralized manner, and the engine output can be easily branched and transmitted to the transmission unit case and the agricultural output shaft above the traveling transmission case.

[0007]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a perspective explanatory view of a drive case part, FIG. 2 is a side view of the whole, and FIG. 3 is a plan view of the same. In the figure, (1) is a management machine, and a machine frame (3) equipped with an engine (2). ) A traveling drive case (4) is integrally connected to the rear end of the drive case (4), and left and right traveling wheels (6) are axially supported on both sides of the lower part of the drive case (4) via an axle (5). ), The base end of the steering handle (8) is supported by the handle base (7) so that it can be horizontally rotated, that is, can be transferred back and forth.

A hitch (9) is provided at the rear of the management machine (1).
The rotary tiller (10) is installed via the
The working machine includes a tilling case (13) for attaching the tilling claw (12) to the tilling shaft (11), a rotary cover (14) covering the upper side of the tilling claw (12), and a resistance rod (15) for adjusting the tilling depth. (10) is provided.

The drive case (4) is separately formed into a traveling base case (16), which is a basic base of the machine, and a transmission unit case (17), which is rearranged according to various working purposes. The unit case (17) is provided with a hydraulic continuously variable transmission (20) which is an HST and is composed of a variable displacement hydraulic pump (18) and a constant displacement hydraulic motor (19).

As shown in FIGS. 4 to 6, the unit case (17) is provided with one input shaft (21) and two PTO shafts (22) (23) for traveling and rotary,
A base case in which an input shaft (21) is input-connected to an output shaft (2a) of the engine (2) via a belt transmission mechanism (24), and is interlockingly connected to the axle (5) via a sprocket transmission mechanism (25). On the input shaft (26), the traveling P
The TO shaft (22) is output-coupled by spline fitting, and further the rotary case input shaft (28) rotates the rotary shaft to the rotary case input shaft (11) via the sprocket transmission mechanism (27) of the rotary case (13). PTO shaft (2
3) is connected to the output through the sprocket transmission mechanism (29). The belt transmission mechanism (24) includes an output pulley (24a) and an input pulley (24).
b) and a belt (24c), the sprocket transmission mechanism (25) includes a variable speed output sprocket (25a), an axle sprocket (25b), and a chain (2).
5c).

The unit case (17) is a traveling transmission case (17a) in which the rotational speed of only the traveling PTO shaft (22) can be changed by the continuously variable transmission mechanism (20).
And a rotary speed change case (17b) capable of changing the rotational speed of only the rotary PTO shaft (23), and an interlocked speed change case () capable of changing the rotational speeds of both the traveling and rotary PTO shafts (22) (23). 17c) three cases (1
7a) (17b) (17c), one of these cases (17a) (17b) (17c) is attached to the base case (16) according to various work applications, and the hydraulic pump (18) Swash plate adjustment shaft (30) for adjusting the swash plate angle
When the gear is rotated by the speed change lever (31) provided on the handle (8), the hydraulic discharge amount is adjusted to accelerate or decelerate or reverse the hydraulic motor (19) to drive the traveling wheel (6) or the plowing pawl (12). ) Or both rotations are controlled.

As is apparent from the above, the engine (2) is provided on the front side of the mother case (16) which is a traveling transmission case, and the steering handle (8) is extended behind the mother case (16). In the machine, a transmission unit case (17) having a hydraulic continuously variable transmission mechanism (20) is provided on the upper side of the mother case (16), and traveling wheels (6) are mounted on the lower side via an axle (5). A sprocket transmission mechanism (25) for driving the axle (5) is internally provided in the mother case (16) to be installed. Further, a transmission unit case (17) having a hydraulic continuously variable transmission mechanism (20) is provided above the mother case (16) at a position higher than the upper ends of the running wheels (6), and an input for transmitting the output of the engine (2) is provided. Pulley (2
4b) and the transmission unit case (17) are arranged at substantially the same height above the mother case (16), and the input shaft (21) and the agricultural output shaft of the transmission unit case (17) are provided. A rotary PTO shaft (23) is a traveling output shaft of a transmission unit case (17) and is a traveling PT.
It is provided at a position higher than the O-axis (22).

This embodiment is constructed as described above, and in the case of performing a work in which only traveling can be changed at the time of tilling work, as shown in FIG. 4, the output shaft of the hydraulic motor (19) is used for traveling PTO. Travel gear case (17)
In the case of performing the work of (a), or the work of allowing only the rotary to be changed during the plowing work, as shown in FIG.
When the rotary transmission case (17b) having the rotary PTO shaft (23) as the output shaft of 9) is used to further change the speed of both traveling and rotary during the plowing work, the hydraulic pressure is changed as shown in FIG. The output shaft of the motor (19) is used as a traveling PTO shaft (22), and the PTO shaft (22) is also used.
Through a pair of gears (32) to the rotary PTO shaft (2
The work is performed by mounting the interlocking speed change case (17c) for interlocking 3) on the mother case (16).
Without the hassle of replacing the entire drive case (4),
By the simple operation of reassembling each shift case (7a) (7b) (7c), it is possible to perform work corresponding to various intended uses, and in this case, rearrangement can be easily performed. Workability can be improved by changing the composition.

FIGS. 7 to 8 show another modified structure example, in which the structure is such that the continuously variable transmission mechanism (20) can change the rotation of only the traveling PTO shaft (22). The cases (17d) and (17e) are configured to be attached to the front side or the upper side of the mother case (16).

FIG. 9 shows still another modified structure example in which the rotational speeds of the traveling and rotary PTO shafts (22) and (23) can be changed independently or in conjunction with each other. A single unit case (17f) is provided for transmitting a constant rotation speed from the input shaft (21) to each of the PTO shafts (22) and (23) individually or in an interlocking manner with a constant speed switching slide gear (32). And the input shaft (2
The rotation from 1) is input to the continuously variable transmission mechanism (20) via a pair of reduction gears (33), and the transmission output of the transmission mechanism (20) is independently or interlocked with each PTO shaft (22) (23). A transmission gear changing slide gear (34) for transmitting, and when changing each slide gear (32) (34) to or or position, each PTO shaft (22) or (23)
It is configured to perform independent or interlocked rotation at a constant rotation speed or a variable speed rotation speed.

FIGS. 10 to 12 show another modified structure example, which has the continuously variable transmission mechanism (2).
The unit case (17g) (17h) in which 0) is installed is installed outside the upper end of the drive case (4), and the rotation of only the running wheels (6) can be shifted by the shift output from the transmission mechanism (20). The one shown in FIG. 11 is provided with a PTO shaft (22) for traveling speed change of the unit case (17g), a pair of reduction gears (35) and a sprocket transmission mechanism (25).
And the rotary constant speed PTO shaft (23) are transmitted to the cultivating shaft (11) through the transmission (36) and the sprocket transmission mechanism (27). In FIG. 12, there is a forward / reverse switching clutch (37) for transmitting a constant rotation output from the rotary constant speed PTO shaft (23) of the unit case (17h) to the tilling shaft (11) in the forward or reverse direction. It is interposed between the sprocket transmission mechanisms (27) and (29).

FIGS. 13 to 14 show still another modified structure example in which the hydraulic pump (18) of the speed change mechanism (20) is directly connected to the engine (2) and the hydraulic motor ( 19) is attached to the cultivating case (13), and the input shaft (18) of the hydraulic pump (18) is provided.
A) is extended in the opposite direction and is connected to the belt transmission mechanism (24).

FIG. 15 shows still another modified structure example, in which the continuously variable transmission mechanism (20) composed of the hydraulic pump (18) and the hydraulic motor (19) is unitized to form the cultivating case (13). It is provided internally or externally to have an integrated structure, and the swash plate angle control of the hydraulic pump (18) is performed via the gear shift operation link mechanism (38) so that the rotary rotation can be continuously variable and forward and reverse. It is composed.

FIGS. 16 to 17 show still another modified structure example in which the hydraulic pump (18) and the motor (19) are integrated in the continuously variable transmission on the upper part of the drive case (4). The pump (18) equipped with a mechanism (20)
Fixed rotary rotary first P on the side opposite to the input shaft (18a)
A TO shaft (23a) and a rotary second PTO shaft (23b) for variable speed rotation of the motor (19) are provided, and
These first and second PTO shafts (23a) (23b)
It is arranged equidistant from the rotary main shaft (39) of the tillage case (13), and the first or second PTO shaft (23a) (23)
Sprocket transmission mechanism (29) between b) and main shaft (39)
When the rotation of the first PTO shaft (23a) is transmitted from the first PTO shaft (23a) to the tilling claw (12), the rotary tilling work is performed at a constant rotation speed independently of the vehicle speed, while the second PTO rotation is performed.
When the rotation from the shaft (23b) is transmitted to the tilling claw (12), the rotary tilling work is performed at a continuously variable speed synchronized with the vehicle speed.

[0020]

As is apparent from the above embodiments, according to the present invention, the engine (2) is provided on the front side of the traveling transmission case (16) and the steering handle (8) is provided behind the traveling transmission case (16). A transmission unit case (17) having a hydraulic continuously variable transmission mechanism (20) in a management machine to be extended.
Is provided on the upper side of the traveling transmission case (16),
The sprocket transmission mechanism (25) for driving the axle (5) is internally provided in the traveling transmission case (16) in which traveling wheels (6) are installed on the lower side through the axle (5). Through the transmission case (16), the transmission unit case (1
7) can be mounted at a high position with respect to the axle (5), and the lateral width of the machine body such as the traveling transmission case (16) at the traveling wheel (6) installation position can be easily reduced as compared with the conventional art. The width can be easily reduced, and the transmission unit case (17) can be attached to the side of the traveling transmission case (16), which facilitates shortening the front-rear length of the machine and reducing the headland turning width. Therefore, it is possible to easily improve the traveling property and the work efficiency.

The engine (2) is provided on the front side of the traveling transmission case (16) and the traveling transmission case (16) is provided.
In a management machine in which a steering handle (8) is extended to the rear of a vehicle, a transmission unit case (17) having a hydraulic continuously variable transmission mechanism (20) is installed at a position higher than the upper ends of the traveling wheels (6) to transmit a transmission case ( 16), the input pulley (24b) for transmitting the output of the engine (2) and the transmission unit case (17) are arranged at substantially the same height above the traveling transmission case (16). Since the transmission unit case (17) is arranged at a position higher than the upper side of the traveling wheel (6), the transmission unit case (1
It is possible to easily prevent 7) from interfering with crops, and it is possible to easily reduce the lateral width of the vehicle body such as the traveling transmission case (16) at the position where the traveling wheels (6) are installed, and the compact lateral width of the vehicle body. This can be easily achieved.

Further, the input shaft (21) and the agricultural output shaft (23) of the transmission unit case (17) are provided at a position higher than the traveling output shaft (22) of the transmission unit case (17), The connecting structure for the engine (2) and the farm work input shaft (28) can be collectively configured at a high position where the transmission unit case (17) is provided, and the traveling transmission case (1
6) The output of the engine (2) can be easily branched and transmitted to the transmission unit case (17) and the agricultural output shaft (23) on the upper side.

[Brief description of drawings]

FIG. 1 is a perspective explanatory view of a drive case portion.

FIG. 2 is an overall side view.

FIG. 3 is a plan view of the same.

FIG. 4 is an explanatory view showing a state in which various unit cases are mounted.

FIG. 5 is an explanatory view showing a state in which various unit cases are mounted.

FIG. 6 is an explanatory diagram showing a state in which various unit cases are mounted.

FIG. 7 is an explanatory view showing another modified structure example.

FIG. 8 is an explanatory view showing another modified structure example.

FIG. 9 is an explanatory view showing another modified structure example.

FIG. 10 is an explanatory view showing another modified structure example.

FIG. 11 is an explanatory view showing another modified structure example.

FIG. 12 is an explanatory view showing another modified structure example.

FIG. 13 is an explanatory view showing another modified structure example.

FIG. 14 is an explanatory view showing another modified structure example.

FIG. 15 is an explanatory view showing another modified structure example.

FIG. 16 is an explanatory diagram showing another modified structural example.

FIG. 17 is an explanatory view showing another modified structure example.

[Explanation of symbols]

 (2) Engine (5) Axle (6) Running wheels (8) Steering wheel (16) Base case (travel transmission case) (17) Transmission unit case (20) Hydraulic continuously variable transmission (21) Input shaft ( 22) Traveling PTO shaft (traveling output shaft) (23) Rotary PTO shaft (agricultural work output shaft) (24b) Input pulley (25) Sprocket transmission mechanism

Claims (3)

[Claims] 1. A management machine in which an engine is provided on the front side of a traveling transmission case and a steering handle is extended behind the traveling transmission case, and a transmission unit case having a hydraulic continuously variable transmission mechanism is provided in the traveling transmission case. A management machine characterized in that a sprocket transmission mechanism for driving an axle is internally provided in the traveling transmission case which is provided on an upper side and is provided with traveling wheels on an underside via an axle. 2. In a management machine in which an engine is provided on the front side of a travel transmission case and a steering handle is extended behind the travel transmission case, a transmission unit case having a hydraulic continuously variable transmission mechanism is provided at a position higher than a top end of a traveling wheel. A management machine, which is provided above a traveling transmission case at a high position, and wherein an input pulley for transmitting engine output and the transmission unit case are disposed at substantially the same height above the traveling transmission case. 3. The management machine according to claim 2, wherein the input shaft of the transmission unit case and the output shaft for agricultural work are provided at a position higher than the traveling output shaft of the transmission unit case.