JPS6144077A - Riding farm working machine - Google Patents

Abstract

PURPOSE:To lower the height of a bonnet down to some extent as well as to improve sightability to the front, by setting both front and rear wheels down to an almost identical diameter each, while making a crankshaft adjoin within the range of a locus in the side sight of front wheels, in case of a riding farm working machine which portions out a steering wheel and a seat in front and in the rear at the central part of a car width direction. CONSTITUTION:A sectional box-form frame 3 extending in a longitudinal direction is installed in the central part of a car width direction at the lower part of a car body 2, and an engine 4 is mounted on the front part 30. Each of almost identical diametral front and rear wheels 501 and 503 is symmetrically set up in a lower part in front and in the rear of the car body 2, while a crank shaft 403 of the engine 1 is installed so as to cause its part to be adjoined within the range of a locus A of the front wheel 501. And, a transmission 6 is set up in a rear part of the car body 2, and each of first and second propeller shafts 408 and 411 is connected to an input shaft 601 and an output shaft 609 of the transmission. And, a steering wheel 911 and a seat 10 are set up in the central part of each car width direction of both front and rear parts of the car body 2, respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to improvements in riding machines such as agricultural tractors.

(Prior Art) Four-wheel drive agricultural tractors that drive front and rear wheels are known.

The front wheels of conventional work machines of this type are extremely small compared to the rear wheels.The reason why the front wheels are small is because the steering angle of the 111 wheels needs to be large.If the front wheels were made as large as the rear wheels, the left and right wheels would This is because it interferes with the side of the front part that contains the engine, making it impossible to obtain a large steering angle.

Although the diameter of the front wheels is small, the bonnet that covers the engine at the front is generally high from the engine's rear wheel 14 and extends forward in a substantially flat manner.

(Problems to be Solved by the Invention) In the prior art described above, the front wheels are extremely small compared to the rear wheels, so it is difficult to say that it is necessarily the best for driving on slopes and uneven farmlands. , preferably approximately the same diameter as the rear wheel. In addition, the conventional model with a high bonnet that extends forward almost flat may make it difficult to see the front, which may result in work loss, so improvement is desirable. The bonnet is even higher and comes with a steering penalty.

The present invention has been made to improve the above problems.

(Objective of the Invention) The object of the present invention is to make the front wheel and rear wheel approximately the same diameter and to make the front section including the engine more compact, that is, to keep the overall height of the front section low and to improve the visibility of the front part during work. It is possible to improve the steering angle, reduce work loss, and improve the traversability of farmland with many slopes and bumps.Furthermore, with the above in mind, it is possible to increase the steering angle and improve the steering performance. The present invention provides a riding-on working machine with the following features.

(Means for Solving the Problems) In order to solve the above-mentioned technical problems and also achieve the object L, the present invention provides a riding working machine in which a handle and a seat are distributed front and rear in the center in the vehicle width direction. The main points are that the front wheels have approximately the same diameter as the rear wheels, the engine crankshaft is placed within the trajectory of the front wheels when viewed from the side, and the main points are that the front and rear wheels are jointly steered together. do.

(Effects of Means F) As described above, the engine can be lowered and the height of the front part including the engine can be lowered, and since the front wheels are as large as the rear wheels, running performance is improved. Steering performance is improved by wheel steering.

(Embodiment) Next, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Fig. 1 is a perspective side view of the main part of the riding work machine (1) in cross section, in which there is a frame i, (3) with a Ponk-shaped cross section in the front and rear direction at the center of the lower part of the vehicle body (2) in the vehicle width direction. It is provided. The frame (3) consists of a front part (301) and an intermediate part (302) connected to this.
), the engine (4) has a crankcase (401) facing the center in the vehicle width direction, and a sill part (402).
) is arranged inclined to one side as shown in FIG. A crankshaft (403) disposed in a crankcase (401) of an engine (4) faces in the front-rear direction, and a flywheel (40
4) and a cooling fan (405), the output part (40B) is connected to the joint (407), and the propulsion shaft (
40B) is spaced apart above the frame (3) under the floor (201) of the vehicle body (2).

Left and right front wheels (501) are located at the bottom of the front and rear of the vehicle body (2).

(502), left and right rear wheels (503), (5oa) are arranged, and the crankshaft (403) faces the front and back of the description.
) is the trajectory of the front wheels (501) and (502) (A)
Try to come inward. Such wheels (501) to (504
)'s drive system is as follows.

A transmission (6) is disposed at the rear of the vehicle body (2), and the rear end of the first propulsion shaft (408) joins the transmission (6).
(409) to the input shaft (801), and is connected to the L portion (602) of the case (602) of the transmission (6).
03), the gear lever (605) extends forward from the top of this, and the knob (804) faces the floor (201) H.
is provided. Lower part (80B) of case (eo2)
Separately located on the left and right rear sides of the
07) are installed hanging down, and left and right rear wheels (503), (5
04) are connected, drive the rear wheels (503) and (504), and support the rear wheels (503) and (504). It is possible to turn the steering wheel.

Transmission case (802) lower part (eoe)
faces the rear of the frame (3), the output shaft (809) protrudes from the Lij 1 side of this part, and the joint (809) is attached to this.
410) to connect the rear end of the second propulsion shaft (411). The second propulsion shaft (411) extends forward through a duct-like space (303) provided in the front-rear force direction within the frame (3), and joins the front end of the propulsion shaft (411).
412) to the input shaft (701) of the transmission case (7)
The transmission case (7) is connected to the center part (3) of the frame (3).
The front part (301) of the frame is provided with shallow channel-shaped members (304) and (305) vertically opposed to each other, as shown in FIG. consists of members (304)
, (305') is provided with a transmission case (7).

Output shafts (702) and (7) are located on the left and right sides of the transmission case (7).
02) stands out, and universal join) (7
03).

The drive transmission shaft (704) extends left and right through (703).
).

(704) are connected, and the shafts (704), (704
) to the universal joint (705), (70
5) Connect the left and right blind case (70B), (
70G) input shaft (707), (70?). Left and right glue reduction case (70B), (70
6) output shaft (708), front wheel (50
1) and (502) are connected and a reduction case (70
B), (70B) are each transmission shaft (704), (704
Arms (30B), (30?), which are arranged in front and behind this so as to sandwich it, and which extend outward (in the left and right direction)...
・Come in between. The arm (30B), (307)...
・The base ends of the links (8) and (8) are pivoted (801)
) L, the links (8) are extended outwardly, and the tips (8)
02) to the king pin unit (803) of the reduction case (70B), and thereby the front wheel (501)
, (502) is - vertically swingable, and the unit (
803) The front wheels (501) and (502) can swing left and right using the upper and lower kingpins (804) and (805) as fulcrums to perform steering and turning. The rear wheels (503) and (504) are similarly suspended, and the left and right output shafts (8+o) and (e1o) of the transmission (6) are connected to the joint (811).
) to connect the left and right transmission shafts (812), (812) to the transmission shaft (812).

Join (612) to (813), (e 13)
the input shaft (814) of each reduction case (807)
and transmit power to the rear wheels (5o3) and (504).

Front wheels (501), (502), rear wheels (503),
Each reduction case (70B) of (504), (
807)... are connected to knuckle arms (801), (902)... provided on the front, back, right and left sides, respectively. Front wheel side knuckle arm (901), (90
1) is a tire roof (903) that extends inward in the width direction of each vehicle.
), (903) are connected to each end of the tie rod (
903) and (1103) are connected to the left and right parts of the front part (805) of the center arm (!304). The center arm (904) is attached to the frame (3
) A steering gear box (!307) is disposed on the arm (904) facing the boundary between the middle part (302) and the front part (301). A sector gear (908) is housed in the gear box (90?) as shown in FIG. 3, and a vertical shaft (1110) is fixed to the base of the gear (908).
9) is extended downward outside the gear box (907), and is tied at the midpoint of the arm (904). Sector gear (
In front of 908) is a binion (910) that meshes with this.
, and this is connected to the shaft (912) of the handle (811) disposed at the front part in the widthwise center of the floor (201).
) so that the binion (910) can be rotated by rotating the handle (Ell), and the shaft (912) is suspended down through the inside of the handle boss (913).

The described center arm (904) has an abbreviated shape with a large angle in plan view, and connects a rear part (90B) extending rearward and laterally behind the pin (90E+) to the tip of the connecting rod (914). There is a support pin (915) on the rear of the frame (3).
A pin (915) is provided at the center in the vehicle width direction in front of the transmission (6), and the center point of the center arm (file) in plan view y5 is pivoted to this pin (915).
B) Arms (917) and (818) extending from the pin (915) to the left, right, and forward external force have unequal lengths, and the tip of the long arm (917) is the rod (11114) described.
The rod (814) connects the rear ends, and is disposed obliquely at the middle part of the vehicle body in the longitudinal direction, with the tip facing toward one side and the rear end facing toward the other side, as shown in FIG. Then, the inner tip of the longer arm (917) and the other short arm (1
118) and the left and right tie rods (919), (
Connect to each tip of the pin (920) and connect the pin (915) to the mouth/
The left and right tie rods (!1119) and (920) are extended rearward so that their respective rear ends face outward. Left and right knuckle arms of the rear wheel axle (902), (902
) to tie rods (1119) and (920
) are provided in a V-shape in plan view so as to be sequentially spaced apart toward the rear. This forms a steering mechanism (9), which is connected to the upper and lower propulsion shafts (408), (411) on the frame (3).
) are arranged using the space between them.

In this way, all four wheels (501) to (504) on the front, rear, left and right sides are driven, and the four wheels (501) to (504) are steered. Specifically, the engine power output by the propulsion shaft (40B) is changed in speed by the transmission (8), and the engine power outputted by the propulsion shaft (40B) is
Reduction case (80?) through (814)
), (eo7), rear wheel (503), (
504), and is input to the front and rear transmission cases (7) via the propulsion shaft (4+1), and its output is transmitted via the left and right drive systems (702) to (70?) to the reduction case (70B), (708), the front wheel (
501) and (502). Four-wheel drive is achieved in this manner.

On the other hand, when the steering wheel (911) is rotated to the right or left, the pinion (910) is rotated to the right or left, thereby, for example, moving the center arm (904) counterclockwise in FIG. The gear (908) is swung through the support shaft (909), which causes the tie rod (903) and (90
3) Press one side left and right, pull the other side, and press the knuckle (
Swing the arms (901) and (901) to the left,
The front wheels (
501) and (502) to the right to steer the front wheels. Also, by swinging in the same direction as the arm (!904), push the Rofd (914) backwards, and the rear center arm (11
18) clockwise around the bottle (915), push one side (919) of the tie rod, and press the other (920).
) and knuckle arm (1102), (902
), push and pull the left and right rear wheels (503) and (504
) are steered to the front wheels (501) and (502) in opposite phases, so that the front wheels (501) and (502) are steered to the rear wheels (501) and (502).
503).

(504) using a large diameter wheel that is approximately the same diameter as the front wheel (501).
).

Even if the steering angle of (502) is small, the turning radius is smaller than that of conventional small front wheels, and even though a large diameter front wheel is used, there is no interference between the front wheel and the front part of the vehicle body.

By the way, a seat (10) is provided at the center in the vehicle width direction on the rear part of the vehicle body (2), and the seat (10) is connected to the handle (
It is installed at the same position behind the 811) and has a single occupant. The seat (10) is installed on a base (11) attached to one side of the transmission (6) 1 via a board (101), and a hitch (III) is attached to the rear lower part of the base (11) so as to be able to swing freely. Hituchi (11) is extended to Link (11).
2), and the rotor and other parts are attached to the heater 7 (113). Further, a base (12) is provided in the front part of the upper member (304) of the frame front part (301), and a pitch (121) is provided in the lower part of this so as to be swingable via a link (+22). 123) protrudes forward and mounts the rotor and others.

In Fig. 1, (13) indicates the fuel tank, (14) indicates the muffler, and part of the crank shirt (403) faces within the trajectory (A) of the front wheels (501) and (502), so the engine The overall height of (4) is reduced, and the ponnet (202) provided at the front of the vehicle body can be made lower so that it tilts forward and downward.

(Effects of the Invention) As is clear from the above, according to the present invention, first, since the front wheels are made larger to have approximately the same diameter as the rear wheels, it is possible to improve running performance over uneven or sloped farmland, etc. , it is possible to further improve the practicality of this type of work machine, and
Because a portion of the engine crankshaft faces within the path of the front wheels, the engine can be lowered and the height of the bonnet can be lowered, making it easier to see the front, which is advantageous for work and driving.

Next, the front and rear wheels are approximately the same diameter, which simplifies the transmission mechanism and transmission mechanism, which is advantageous in terms of running speed and all-terrain performance. By increasing the diameter of the wheel, a smaller turning radius than conventional H can be obtained with a small steering angle without interfering with the vehicle body side, and a riding work machine with excellent maneuverability while satisfying the requirements 1-1. It will be done.

[Brief explanation of drawings]

Fig. Pfi1 is a longitudinal cross-sectional side view of the riding work machine according to the present invention, Fig. 2 is a plan view thereof, Fig. 3 is a cutaway plan view of main parts showing the steering mechanism, Fig. 4 is a plan view showing the drive system, Fig. 5 The figure is a fracture pressure surface view of the front part. In the drawings (5019 to (504) are wheels, (4) is an engine, (911) is a handle, (lO) is a seat, and (A
) is the front wheel trajectory, (403) is the crankshaft, (9
01) to (920) are steering mechanisms. Patent applicant: Agent for Honda Motor Co., Ltd.
Patent Attorney Part 2 1) Part 1 Patent Attorney
Kuni Ohashi, Katsutaka, Patent Attorney, Koyama, Amendment to existing procedure (voluntary), December 13, 1980, 1, Indication of case, Patent Application No. 167100, 1982, 2,
Name of the invention Riding work machine 3, person making the amendment Relationship to the case Patent applicant (532) Honda Motor Co., Ltd. 4, Agent 56-11-3 Akasaka 1-chome, Minato-ku, Tokyo Date of amendment order Voluntary and A column for detailed description of the invention? , Details of the amendment As shown in the attached sheet 1, the specification is amended as follows. a, on the 2nd page, pi, line 410, on the 13th line, "steering angle" is corrected to "steering angle", and on the 20th line, "slope value" is corrected as "11Ji slanted ground" . b, on the 2nd line of page 3, "Ponenne 7 no" was corrected to "Ponnetsu", on the 15th line of the same page, "Measurement value" was changed to "side land", and on the 16th line of the same page, "Rudder angle" was corrected. Correct the word "J" to "rudder angle". In the fourth line of page 4 of C0, the phrase "side view" is corrected to "side view." d, page 8, line 4, "Kingpi" is corrected to "Kingpin". e, page 10, line 17, "plane view" is replaced with "plane view"
I am corrected. f, page 14, line 5, ``rudder angle'' is corrected to ``rudder angle.'' 2. The scope of claims is amended as shown in the attached sheet. Attachment [2, Claim 1, All four wheels provided on the front, rear, left and right sides are driven, and an engine is provided between the left and right front wheels, and a center portion in the vehicle width direction between the front wheels and the rear wheels is provided. A steering wheel is provided in the front part of the engine, and a passenger seat is provided in the rear part of the engine. A riding work machine. 2. All four wheels installed on the front, rear, left and right sides are driven, with an engine installed between the left and right front wheels, and a steering handle located at the front of the center of the vehicle in the width direction between the front and rear wheels. A passenger seat is provided at the rear, the front and rear wheels have approximately the same diameter, and a portion of the crankshaft of the engine faces within the trajectory of the front wheels in a side view.1. A riding working machine consisting of the above, configured so that the wheels are simultaneously steered by linking the steering of the front wheels.

Claims (1)

[Claims] 1. All four wheels provided on the front, rear, left and right sides are driven, and an engine is provided between the left and right front wheels, and the front part of the center in the vehicle width direction between the front wheels and the rear wheels. A steering handle is provided at the rear, and a passenger seat is provided at the rear, the front and rear wheels have approximately the same diameter, and a portion of the crankshaft of the engine faces within the trajectory of the front wheels when viewed from the side.2 The engine is installed between the left and right front wheels, and the steering wheel is located at the center of the vehicle widthwise between the front wheels and the rear wheel. includes a passenger seat; the front and rear wheels have approximately the same diameter; a portion of the crankshaft of the engine faces within the locus of the front wheels in a side view; the front wheels are steered and the rear wheels are also steered at the same time. A riding working machine consisting of the above, configured to be steered by linking the front wheels with the steering.