JP2000168453A - Alighting and boarding step for high-floor tractor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To extend a step in alighting and boarding and regulate it to a height suitable for alighting and boarding by providing a vertically extensible and contractible step on the side part of the step floor of a vehicle body. SOLUTION: An extensible and contractible step 3 is mounted on one side end of a step floor 2. The upper end of the ladder-like step 3 is connected to a bracket 18 protruded from the step floor 2 by a pin 19 and mounted in such a manner as to be vertically rotatable. The step 3 comprises parallel base frames 20 consisting of pipe materials, a longitudinal base pipe 12 for connecting the upper ends of the base frames 20, and an upper step 22 for connecting the lower ends thereof, and the pin 19 is inserted to the base pipe part 21. An extensible and contractible frame 23 formed into U-shaped state by use for a minor diameter is put between the lower ends of step 24 connected to the middle is put between the lower ends of the base frame 20 in such a manner as to be extensible and contractible so that the height can be regulated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a step for getting on and off a raised tractor.

[0002]

A high-floor tractor often performs management work while traveling over crops, ridges, and the like, and it is not easy for the operator to get on and off the vehicle at a place where the floor surface is low.
In addition, fixing a ladder-shaped step to the vehicle body tends to hinder work and running.

[0003]

SUMMARY OF THE INVENTION The present invention has a construction of a stepping-in / out step of a high-floor tractor, which is provided with a vertically expandable and contractible step 3 on a lateral side of a step floor 2 of a vehicle body 1.

[0004]

When the operator gets on the step floor 2 or gets off the step floor 2, the step 3 is extended and adjusted to a height suitable for getting on and off. In addition, when it is unnecessary after getting on and off, step 3 is shortened so as not to hinder work or running.

As described above, the telescopic step 3 is permanently provided on the side of the step floor 2, and when the operator gets on and off, the step 3 is extended to an appropriate height, so that the operator can easily get on and off. be able to. Constitution,
Operation can be simplified.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION A tractor body 1 has an engine mounted under a front hood 4, a steering wheel 6 provided on a dashboard 5, and a cockpit 7 on the rear side via a step floor 2. And a hitch 8 at the rear end for connecting the working machine. Reference numeral 9 denotes a side step floor arranged on the side of the cockpit 7.

[0007] A front axle housing 10 and a rear axle housing 11 are arranged in a lower portion of the vehicle body 1, and upper and lower long cases 12, 13 are provided at both left and right ends of each of the housings 10, 11.
At the lower ends of the steering wheels 2 and 13, a steering case 16 on which the front wheel 14 is mounted and a steering case 17 on which the rear wheel 15 is mounted are provided, and the steering handle 6 is operated via power steering or the like. Can be linked to each other.

A step 3 which can be extended and contracted is mounted on one side end of the step floor 2. In this step 3, the upper end of the ladder-shaped step 3 is connected to a bracket 18 projecting from the step floor 2 with a pin 19, and is mounted so as to be vertically rotatable. In this step 3, the upper ends of the parallel base frames 20 made of pipe material are connected by a base pipe 21 in the front-rear direction, and the lower ends are connected by an upper step 22.
The pin 19 is inserted through the base pipe 21.

An extensible frame 23 made of a small-diameter pipe member is inserted into the lower end of the base frame 20, so that it can be extended and contracted. The telescopic frame 23 is formed in a U-shape, and connects the intermediate portion at a lower step 24. The telescopic frame 23 has a stopper 27 at the upper end so as not to come off in the extended state. Further, a set bolt for fixing the telescopic position of the telescopic frame 23 with respect to the base frame 20 may be provided.

The base frame 20 includes a bracket 18
The step 3 can be switched between the downward use state A and the upward storage state B and maintained. A handle 26 projects outward from the upper end, and can be operated by holding the handle 26 when the step is rotated. When the handle 26 is stored, the handle 26 is received on the upper surface of the step floor 2 to maintain the stored state B. It becomes a stopper.

5 to 7 are different from the above example in that
The expansion and contraction of the step 3 is performed by the damper cylinder 28,
The storage is performed by the damper cylinder 29. It is intended to easily perform expansion, contraction, storage, and the like with a small operation force. The telescopic damper cylinder 28 is provided between the base frame 20 and the telescopic frame 23, and can be extended against the tension spring 30. Further, the storage damper cylinder 29 is provided between the bracket of the step floor 2 and the base frame 20, and rotates the step 3 from the storage state B to the use state A while extending it against the tension spring 31. Can be operated dynamically.

8 to 10, a different point from the above example is that an extraction transmission case 34 for bearing a traveling drive shaft 33 is provided below the transmission case 32 at the rear part of the vehicle body 1, and a take-out transmission case 34 is provided on the front side of the traveling drive shaft 33. A front wheel transmission shaft 36 connects the front axle housing 10 and a front differential input shaft 35 in the center of the front axle housing 10. The rear drive input shaft 3 and the rear differential input shaft 3 in the center of the rear axle housing 11
7 is connected by a rear wheel transmission shaft 38, and these front wheels and
The rear wheel transmission shafts 36 and 38 are formed substantially horizontally along the lower side of the vehicle body.

The engine 3 mounted under the hood 4
9 connects the clutch housing 41 with the rear plate 40 interposed on the rear side, and connects the transmission case 32 to the rear end of the clutch housing 41. A central portion of the rear axle housing 11 is supported and connected to a rear side of the transmission case 32 via a rear axle bracket 42 connected thereto.

In the tractor body 1, there is a need A2 to lengthen the wheel base A1 depending on use work, balance and the like. In such a case, the rear axle bracket 4
2 is changed from a short form as shown in FIG. 8 to a long form as shown in FIG. In this case, the rear wheel transmission shaft 38 is also replaced with a long one. 43 is a front axle bracket, which is a front axle housing 1
Strut 0. 44 is a radiator. 45 is a main clutch in the clutch housing 41, and 46 is a transmission shaft connecting the main clutch 45 and the input shaft 47 of the transmission case 32. Reference numeral 48 denotes a PTO shaft which works with a working machine connected to a rear portion.

The transmission mechanism of the transmission case 32 passes through a counter gear 50 on the shaft 49 from the input shaft 47, a main transmission gear 52 on the transmission shaft 51, a sub transmission gear 53, a gear 54 on the shaft 49, and the like. Link to 49. From the clutch gear 55 at the front end of the shaft 49, a gear 56,
The front wheel 14 and the rear wheel 15 can be driven by four wheels in conjunction with the third gear 57.

On the PTO shaft 48, there is provided a transmission clutch gear 58 that can mesh with the counter gear 50,
The transmission of the TO shaft 48 can be changed. On the PTO shaft 48, a rotatable ground PTO meshing with the gear 54 is provided.
A gear 59 is provided, and between the transmission clutch gear 58 and the shaft 49 and P
Transmission and take-out can be performed as a ground PTO that interlocks with the TO shaft 48 at the same rotation ratio.

11 and 12, the difference from the above example is that the engine connected to the front end of the clutch housing 41 via the rear plate 40 as described above is a diesel engine 39 (FIG. 11). When connecting the gasoline engine 61 to the front side of such a clutch housing 41, as shown in FIG. 12, a mount base 62 is provided in the lower front part of the rear plate 40, and the gasoline engine 61 is mounted on the upper side. Attach with bolts 63.

In the space between the gasoline engine 61 and the rear plate 40, the boss 65 of the flywheel 64 in the clutch housing 41 projects toward the front of the rear plate 40 and is fitted and connected to the engine shaft 66. As described above, the specifications of the gasoline engine 61 can be achieved with a simple configuration such as the rear plate 40.

[Brief description of the drawings]

FIG. 1 is a front view of a partially broken tractor and an enlarged cross-sectional view of a part thereof.

FIG. 2 is a front view showing the operation.

FIG. 3 is a perspective view of a step unit.

FIG. 4 is a plan view of the tractor.

FIG. 5 is a side view showing another embodiment.

FIG. 6 is a front view thereof.

FIG. 7 is a front view showing the operation.

FIG. 8 is a side view of a tractor showing a partially different embodiment.

FIG. 9 is a cross-sectional view of the transmission case.

FIG. 10 is a side view of the tractor when a part thereof is changed.

FIG. 11 is a side view of an engine unit showing a partially different embodiment.

FIG. 12 is a side view of an engine unit showing a partially different embodiment.

[Explanation of symbols]

 1 body 2 step floor 3 step

Claims (1)

[Claims] 1. A step for getting on and off a high-floor tractor, comprising a step 3 which is vertically expandable and contractible on a lateral side of a step floor 2 of a vehicle body 1.