JPH0826131A - Passenger management machine - Google Patents

Abstract

(57) [Summary] [Purpose] To improve the stability of the passenger management aircraft during turning. [Structure] The left and right rear wheels 5,5 are supported on the rear part of the traveling body 1 via the left and right rear axles 20,20, and the left and right front wheels 4,4 can be steerably rotated on the front part of the traveling body 1 through a steering mechanism S. The passenger management machine A, which is configured to be capable of turning the traveling body 1 while being supported by
In the above left and right rear axles 20 and 20, respectively.
A tread widening mechanism T, T for widening the tread t between 5 and 5 is provided, and each tread widening mechanism T, T is connected to the steering mechanism S.
The tread widening mechanisms T, T are configured to be widened in conjunction with the steering operation of the steering mechanism S.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a passenger management machine.

[0002]

2. Description of the Related Art Conventionally, passenger management machines are generally small,
Even if the tread is narrow, the ground clearance is set to be large so that the work can be performed on the upper surface of the ridge while the wheel is positioned in the groove between the ridges and traveling.

[0003]

However, when the ground height is increased, the center of gravity is increased, and when the height of the center of gravity with respect to the tread is increased, the vehicle becomes unstable during turning, and further, when the vehicle is U-turned on a headland, the ridge is increased. There is a problem that the instability of the airframe increases due to traveling over.

[0004]

According to the present invention, the left and right rear wheels are supported by the rear portion of the machine body via the left and right rear axles, and the left and right front wheels are supported by the steering mechanism in the front portion of the machine body so as to be steerable and rotatable. In a passenger management machine configured to allow the vehicle to turn, a tread widening mechanism for widening the tread between the left and right rear wheels is provided on each of the left and right rear axles, and each tread widening mechanism is interlockingly connected to a steering mechanism to provide a steering mechanism. It is intended to provide a passenger management machine configured such that each tread widening mechanism is configured to perform a widening operation in conjunction with the steering operation of the.

[0005]

Embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows a riding management machine A according to the present invention. The riding management machine A comprises a traveling machine body 1 and a ground work section 2 connected to the rear of the traveling machine body 1.

The traveling machine body 1 is provided with front left and right wheels 4, 4 and left and right rear wheels 5, 5 on the front, rear, left and right sides of the machine body frame 3, and a front panel 6 is erected on the front end portion of the upper surface of the machine body frame 3. At the rear of the steering wheel, a steering shaft 8 having an upper end connected to a steering wheel 7 is erected upright, a driver's seat 9 is placed behind the steering shaft 8 at a predetermined interval, and a motor section 10 is provided behind the driver's seat 9.
It is equipped with.

At the rear end of the machine body frame 3, a work mechanism frame 14, a work mechanism chain case 15, a tillage claw drive chain case 16, a rotary tillage claw 17, via a link mechanism 11, a lifting mechanism 12 and a hitch 13. Tail wheel 18 and tillage cover
A ground work unit 2 composed of 19 is vertically movable, and the left and right rear wheels 5 and 5 are driven by the power from the prime mover unit 10 to drive the traveling body 1.
And drive the above-mentioned power to the working part chain case.
The rotary tiller 17 is transmitted via the 15 and the tiller driving chain case 16 to perform the tilling work.

The left and right rear wheels 5 and 5 are arranged at the outer ends of the left and right rear axles 20 and 20 which are horizontally mounted on the lower surface of the prime mover section 10.
The left and right rear axles 20 and 20 are provided with tread widening mechanisms T and T, respectively.

As shown in FIGS. 2 and 3, the tread widening mechanism T, T has a hexagonal drive shaft 30 for transmitting rotational power extending from the inside of the prime mover section 10, and an inner end of the hexagonal drive shaft 30 of the prime mover section 10. A rear axle inner cylinder 32, which is fixed to the side surface and has a spline 31 formed on the outer peripheral surface thereof, is externally fitted to the rear axle inner cylinder 32. The driving cam cylinder 34, which has been formed, is rotatably fitted outside, and the rear axle inner cylinder 32
On the outer circumference of the tip of the
A passive cam cylinder body 36, which is formed with 35 and has a spline 31 formed on the inner peripheral surface, is externally fitted so as to be axially slidable and non-rotatable.
By rotating the driving cam cylinder 34, the passive cam cylinder 36 is moved outward in the axial direction.

Further, the wheel hub 37 of the left and right rear wheels 5, 5 is fitted onto the hexagonal drive shaft 30 so as to be axially slidable and non-rotatable, and the outer end surface of the wheel hub 37 and a fixing pin 38 are interposed. A wheel hub 37 is biased inward by a spring 40 provided between the stop ring 39 fixed to the outer end of the hexagonal drive shaft 30 and the inner end surface of the stop ring 39. In the figure, reference numeral 41 is a connecting body provided on the outer peripheral surface of the driving cam cylinder 34 so as to project therefrom.

The left and right front wheels 4, 4 are rotatably supported by a steering mechanism S provided on the lower surface of the front portion of the traveling machine body 1. The steering mechanism S is, as shown in FIG. A steering pinion 50 connected to the lower end of the steering shaft 8 is provided on the lower surface of the body frame 3 so as to project.
The left and right extending portions 53, 53, 54 are formed by engaging the sector 52 axially supported by the 51, and forming left and right extending portions 53, 53, 54 in the sector 52.
Via the left and right tie rods 55, 55, respectively, and are interlocked with the left and right front axle inner ends 57, 57 pivotally supported by the left and right king pins 56, 56, and the rear extension 54 is connected through the connecting rod 60 and the front of the prime mover unit 10. Front and rear guide pins 61,61 protruding from the underside of the machine frame 3
Is linked to the front protrusion 63 of the equalizer 62 that is slidably mounted in the front-rear direction, and the left and right protrusions 64, 64 of the equalizer 62 are connected to each other through the left and right connecting rods 65, 65.
Linked to 1,41.

With this structure, when the steering wheel 7 is rotated from the straight-ahead position to either the right or left direction, the steering pinion 50 at the lower end of the steering shaft 8 is rotated, and the sector 52 meshed with this is rotated. The rear extension 54 of the sector 52 rotates the driving cam cylinders 34, 34 of the left and right tread widening mechanisms T, T via the connecting rod 60 to move the passive cam cylinders 36, 36 outward. The tread t between the left and right rear wheels 5, 5 can be widened.

When the steering wheel 7 is returned to the straight-ahead position, the widening operation of the left and right tread widening mechanisms T, T is restored, and the left and right rear wheels 5, 5 are straightened before the widening by the biasing of the spring 40 in the inward direction. Can be returned to position.

4 and 5, in the chain drive mechanism, even if an inclination occurs between the drive end 71 and the passive end,
The sprocket mounting structure 70 is shown so that power can be transmitted without any hindrance. The sprocket mounting structure 70 has a drive shaft 72 in which a mounting base 73 is non-rotatably fitted, and the mounting base 73
Of the sprocket 76 is formed in a spherical shape on the outer peripheral surface of the sprocket 76, and a plurality of locking projections 75 are formed on the outer peripheral surface 74 of the spherical surface in parallel with the axis of the drive shaft 72. A plurality of locking recesses 77 corresponding to the strips 75 are formed, and the sprocket 76 is mounted on the mounting base 73 while the locking projections 75 and the locking recesses 77 are engaged with each other.

The mounting base 73 is a drive end portion 71 of the drive shaft 72.
Fitted with spline, shaft retaining ring 78, inner washer 7
9, fixed by the outer washer 80 and the mounting bolt 81, the inner washer 79 and the outer washer 80 are
It also serves as a member for restricting the swing angle of the sprocket 76.

With this structure, even if the passive end (not shown) is displaced left and right to deflect the direction of the chain 82,
Since the sprocket 76 is mounted on the spherical outer peripheral surface 74 of the mounting base 73, the mounting angle of the sprocket 76 is set to the chain.
It can automatically follow the swing of 82 and transmit power without any trouble.

The sprocket mounting structure 70 can also be applied to the passive end of the chain drive mechanism. In the riding management machine A of the above embodiment, for example, a working unit chain case that receives power from the prime mover unit 10. 15 Can be applied to the sprocket inside the front end.

[0019]

According to the present invention, the left and right rear wheels are supported on the rear part of the machine body via the left and right rear axles, and the left and right front wheels are rotatably supported on the front part of the machine body by the steering mechanism. In the passenger management machine configured to turn around, the tread widening mechanism for widening the tread between the left and right rear wheels is provided on each of the left and right rear axles, and each tread widening mechanism is linked to the steering mechanism to operate the steering mechanism. Each tread widening mechanism is configured to perform widening operation in conjunction with the direction operation.When the steering mechanism is operated for turning, the tread widening mechanism widens the tread between the left and right rear wheels. The stability of the inside body can be enhanced, and the safety can be improved especially when traveling over the ridge when making a U-turn in a headland.

[Brief description of drawings]

FIG. 1 is an overall side view of a passenger management machine according to the present invention.

FIG. 2 is a schematic explanatory view of the steering mechanism and the tread widening mechanism.

FIG. 3 is a cross-sectional explanatory view of a rear axle.

FIG. 4 is an explanatory cross-sectional view of a drive end of a chain drive mechanism.

5 is a cross-sectional view taken along the line I-I in FIG.

[Explanation of symbols]

 A Passenger management machine S Steering mechanism T Tread widening mechanism t Tread 1 Travel vehicle 4 Front wheels 5 Rear wheels 20 Rear axle

Claims (1)

[Claims] 1. Left and right rear axles (20) (2) at the rear of the traveling vehicle (1)
0) supports the left and right rear wheels (5), (5), and supports the front left and right wheels (4), (4) rotatably in the steering direction (S) in the front part of the traveling body (1). In the passenger management machine (A) configured so that the traveling machine body (1) can turn, the left and right rear axles (20) (2)
(0) is equipped with a tread widening mechanism (T) (T) that widens the tread (t) between the left and right rear wheels (5) and (5) respectively, and each tread widening mechanism (T) (T) is connected to the steering mechanism (S). ), And the tread widening mechanism (T) (T) is configured to perform a widening operation in conjunction with the steering operation of the steering mechanism (S).