JPH08253172A - Step device of tractor - Google Patents

Abstract

PURPOSE: To easily and safely perform getting on and off of a driver to a tractor car body having crawlers. CONSTITUTION: A step device of a tractor is constituted in such a way that on a car body having a pair of left and right crawlers 1, side floors 3 are arranged in upper side parts of these crawlers 1, and steps 4 are arranged in a position lower than the side floors 3 in a front part between these crawlers 1, respectively.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a step device in a crawler traveling type tractor, in which a step on a front portion of a vehicle body is provided so as not to interfere with traveling.

[0002]

2. Description of the Related Art In a tractor having a crawler as a traveling device, if a step is provided on the lateral side of the vehicle body, the step protrudes to the side of the crawler, and when traveling, Easy to get in the way. Also, if this step is provided on the upper side of the crawler, the position is high and it is difficult to step.

[0003]

The present invention is directed to a vehicle body 2 having a pair of left and right crawlers 1 for these crawlers 1.
The side floor 3 is disposed on the upper side of the tractor, and the step 4 is disposed on the front part between the crawler 1 and the side floor 3 at a position lower than the side floor 3, respectively.

[0004]

When the driver moves up and down on the tractor vehicle body 2, he / she steps on the step 4 to get on / off the side floor 3, so that even if the side floor 3 becomes high, the user can easily go up and down. Step 4 is car body 2 and crawler 1
Since it is provided at a lower position than the side floor 3 in the front part between the and, the protrusion to the front, the lateral side, etc. with respect to the crawler 1 is eliminated, and it does not hinder the running, and the configuration is simple. Is.

[0005]

1 to 3, a tractor body 2 has an engine mounted in a front hood 5, a rear driver's seat and a cab, a steering device, and the like. Covered with cabin 6. The cabin 6 has doors 7 that can be opened and closed on both left and right sides, a front glass 8 on the front surface, and a rear glass 9 on the back surface. The crawlers 1 are arranged on both left and right sides of the vehicle body 2, and the crawlers 1 on the left and right sides can be transmitted by the power from the engine via a transmission mechanism inside the vehicle body 2. Further, side floors 3 are provided along the upper side surface of the crawler 1 at positions on the left and right sides of the vehicle body 2 at substantially the same height as the driving floor in the cabin 6, and the lateral ends are located at the crawler 1 side.
Wide enough to match the outer edge of the.
Further, a rising portion 10 is provided at the rear end of the side floor 3. Reference numeral 11 is a crawler frame.

The step 4 is made of a plate material having a sufficient width to receive either the left or right foot, and is located at a position lower than the side floor 3 between the front end of the vehicle body 2 and the crawler 1 located outside. Is provided at the front end surface of the vehicle body 2 and is set to be slightly behind the front end of the crawler 1. For this reason, in step 4, when the driver gets in and out of the front side, it is easy to step forward because it protrudes to the front and side of the vehicle body 2. It is behind the front end of 1 and difficult to contact. Further, this step does not interfere even when the crawler 1 is driven.

Further, the handle 12 is provided at the front portion of the hood 5, or at a position near the hood 5 side of the side floor 3, and the driver can get on and off safely by gripping the handle 12 when getting on and off. It may be configured as follows. 5 to 9, a point different from the above example is that in a front loader using a wheel tractor, a gripper of an attach lever 14 for moving up and down the front loader 13 has a reverser switch for moving forward and backward. 15, the steering handle 16 is operated with the left hand, while the right hand is operated to switch between the forward and reverse of the vehicle body 2 and the elevation of the front loader 13 is performed, so-called V-shaped excavation as a front loader work (Fig. 6) It is easy to repeat the forward / backward movement and the direction change operation.

The tractor vehicle body 2 has steerable front wheels 17 and rear wheels 18 instead of the crawler 1, and a loader frame 19 for mounting a front loader 13 is attached to the side of the bonnet 5. The front loader 13 includes a loader arm 20 that is vertically rotated with respect to the loader frame 19, a lifting cylinder 21 that vertically rotates the loader arm 20, a bucket 22 that is dumped at the tip of the loader arm 20, and the bucket 22. It is composed of a dump cylinder 23 and the like for dumping 22 by hydraulic pressure. These operations are performed by the driver of the driver's seat 24 by operating the attach lever 14, the reverser switch 15, and the like.

The attach lever 14 is provided on the fender on the right side of the driver's seat 24, and the floor 25 has an accelerator petal 26 on the right foot side and a brake petal 27 on the left foot side. An assist grip 28 is provided on the steering handle 16 to facilitate steering operation with one hand. The handle post 29 is provided with a reverser lever 30 on the left hand side, and by operating the reverser lever 30, a reverser clutch provided as a traveling transmission in the vehicle body 2 can be switched to switch between forward and reverse.

The reverser switch 15 of the attach lever 14 may be configured as a push button switch as shown in FIG. 7 so as to switch to the reverse position at the pushing position, or as a toggle switch as shown in FIG. Good. The operation by the reverser switch 15 is independent of the operation by the reverser lever 30, and the switching relay 31 and the work mode switch 32 can output the solenoids 33F, 33R for switching the reverser clutch. 34F and 34R are switches that can be operated by the reverser lever 30. When the reverser lever 30 is operated to the forward side, the switch 34F is turned on, and the solenoid 33F turns on the reverser clutch on the forward side. On the contrary, when operated backward, the solenoid 33R
As a result, the reverse clutch on the reverse side is turned on.

When the work mode switch 32 is selected and turned on, the switching relay 31 which is normally energized to the forward side is switched to the reverse side by turning on the reverser switch 15, and the reverser lever 30 operates. Regardless of the operation, the forward and reverse operations by the reverser switch 15 are prioritized. In addition, in FIG. 6, 35 is earth and sand, 36
Is a dump truck. F indicates forward and R indicates reverse.

In FIG. 10, the point different from the above example is that the accelerator pedal 26 is stepped backward to switch the reverser switch 15 to engage the reverse clutch. Accelerator 26
Can be rotated around the petal shaft 37 by stepping on the front side F and the rear side R. From the accelerator petal 26 to the rod 38
A T-shaped arm 39 is connected to rotate about an arm shaft 40 via a link, and the upper and lower ends of the arm 39 and a long hole of a connector 42 of the throttle wire 41 are linked by a link 44. When the accelerator petal 26 is stepped on either the forward side F or the reverse side R, the throttle wire 41 is pulled through the arm 39 against the spring 43 to increase the engine rotation. There is. The reverser switch 15 is pushed by the rotation of the arm 39 on the reverse side and turned on. The reverser clutch can be switched to the reverse direction by outputting the solenoid 33R of the circuit in FIG. Also, when the accelerator pedal 26 is stepped on the forward F side, the reverser switch 15 is OF
Then, the solenoid 33F on the forward side is output.

In FIG. 11, the point different from the above example is that the accelerator petal 26 is provided with a hook 45 capable of fitting a toe.
The hook 45 can be pivoted upward with a foot to perform the reverse side R operation of the accelerator pedal 26.

[Brief description of drawings]

FIG. 1 is a plan view.

FIG. 2 is a front view.

FIG. 3 is a side view.

FIG. 4 is a side view showing another embodiment.

FIG. 5 is a front view of a part thereof.

FIG. 6 is a plan view showing a working state.

FIG. 7 is a partially enlarged side view.

FIG. 8 is a side view and a plan view showing the operation of another embodiment.

FIG. 9 is a partial circuit diagram.

FIG. 10 is a side view of an accelerator petal portion showing another embodiment.

FIG. 11 is a side view and an action side view of an accelerator petal portion showing another embodiment.

[Explanation of symbols]

 1 crawler 2 vehicle body 3 side floor 4 steps

Claims (1)

[Claims] 1. A vehicle body 2 having a pair of left and right crawlers 1, and a side floor 3 on the upper side of these crawlers 1.
At the front part between the crawler 1 and the side floor 3
A step device for a tractor in which steps 4 are arranged at lower positions than the step device.