JPS581380Y2 - How to use a conventional tractor - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a step device for an agricultural tractor.

Conventionally, steps are fixed to the side of the aircraft, but
It is difficult to install them, and if the step is installed first, it is also not easy to install the clutch petals, brake pedals, and their return springs.

This idea was devised in view of these points, and it makes it easier to install the steps, isolate vibrations from the aircraft, and make it easier to install the clutch peckle and brake arm, as well as their return springs. The object of the present invention is to obtain a step mounting device for an agricultural tractor that can be mounted on an agricultural tractor.

An embodiment of this invention will be described based on the drawings.

Reference numeral 1 denotes a mission case that serves as the body of the tractor, and two support shafts 3 and 4 are located front and back on the side surface 2 of the mission case 1 and project laterally and are screwed together in parallel. Fixed by

6 is a flat step with a part of its periphery bent for reinforcement, and vibration isolating rubber 7.8 is fixed to both sides of the lower surface of this step.

That is, the vibration isolating rubber 7.8 is baked onto a steel plate 9 bent into an L-shaped cross section, and this steel plate 9 is joined to the bottom surface 10 and side surface 11 of the step 6, and the fixing bolt 1
It is fixed by 3.

Further, a hole 12 is formed in the center of the vibration isolating rubber 7.8.

The diameter of this hole 12 is determined to be large enough to allow the support shaft 3.4 to be press-fitted therein.

Such a step 6 is inserted into the hole 12 with the support shaft 3.degree. 4 elastically fitted into the hole 12 from the side.

Further, the rear support shaft 4 extends outward, and although not particularly shown, its tip is fixed to the fender.

This fender is installed later and faces the outer edge so as to limit the axial movement of the step 6.

Next, 14 is a petal shaft, to which a brake pedal (not shown) is connected, a brake arm 15 is attached, and a brake rod 16 is connected to this brake arm 15.

Further, the brake arm 15 is provided with a pin 17, and a brake pedal return spring 19 is stretched between the pin 17 and a spring receiver 18 fixed to the rear of the transmission case 1.

Further, a cylindrical base 20 is rotatably attached to the petal shaft 14, and an arm 22 to which a clutch rod 21 is coupled is fixed to the base 20, and is located below the step 6. A petal having an arm portion 23 that comes into contact with the lower surface of the vibration isolating rubber 7, that is,
A clutch petal 24 is attached.

Furthermore, a return spring 25 is stretched between the base 20 and the spring receiver 18.

In such a takeover, the assembly order will be explained first. Before the installation in step 6, the clutch pedal 24 and the brake pedal are installed.

The biggest problem when installing this is the tension between the brake pedal return spring 19 and the return spring 25, but since step 6 is not installed, the rotation range of the clutch petal 24 etc. is large, and the amount of extension is the largest. Since the clutch petal 24 can be rotated to the normal position by locking with a spring at a position with a small amount of force, the clutch petal 24 itself can be used in place of a mounting tool, and the work is facilitated.

Next, while pressing down the clutch petal 24, the spindle 3 is attached, and the spindle 4 is also attached.

Then, the anti-vibration rubber 7.8 is attached to the lower surface of the step 6 using the fixing bolt 13 in advance in a separate process.

In step 6, the clutch pedal 24 is pushed down to a certain extent to prevent interference, and then the vibration isolating rubber 7.
It is attached by fitting the support shafts 3 and 4 into the holes 12 of 8 and pushing them.

In this way, since the step 6 is attached via the vibration isolating rubber 7.8, vibrations from the mission case 1, which is the aircraft body, are transmitted in a reduced manner.

In addition, since the spring receiver 18 that locks the brake pedal return spring 19 and the return spring 25 is provided independently of the step 6, when the pedal is stepped on, the vibration isolating rubber 7
．． 8 will not be compressed and the anti-vibration effect will be lost or the life of the anti-vibration rubber 7.8 will not be shortened.

Furthermore, since the anti-vibration rubber 7.8 is baked into the iron plate 9, even if the fixing bolt 13 is tightened, the anti-vibration rubber 7.8
distortion is prevented, and the fitting with the support shafts 3 and 4 is smooth.

Or, attach the anti-vibration rubber 7 to the arm portion 23 of the clutch pedal 24.
Since the arm part 2 is aligned with the position of
3 is applied to the anti-vibration rubber I, and the clutch petal 24
The impact applied to step 6 when the step is released is damped, and unpleasant sounds and vibrations are prevented from occurring.

This idea is to attach the step by inserting the support shaft from the side into the hole in the anti-vibration rubber of the step, using the support shaft that is provided parallel to the side of the aircraft and protruding laterally as described above. This makes it extremely easy to install the step.
Moreover, since the step can be installed last, it is easy to install peripheral parts such as petals, and after installation, the vibrations of the aircraft will not be transmitted to the step, and the step will remain stable even if external force is applied to it. When the pedal is released, its arm hits the anti-vibration rubber, so there is no vibration noise, and no vibration is transmitted to the steps. It is something that you have.

[Brief explanation of drawings]

The drawings show one embodiment of this invention, and FIG. 1 is a partially cutaway plan view, and FIG. 2 is a longitudinal sectional side view of a portion thereof. 1...Mission case (aircraft), 2...
...Side, 3-4...Spindle, 6...Step, 7-8...Vibration-proof rubber, 12...
・Hole, 13...Fixing bolt, 14...
Petal shaft, 20...Base, 23...
... Arm part, 24 ... Clutch petal (petal), 25 ... Return spring.

Claims (1)

[Scope of utility model registration request] A petal shaft that holds the base of a petal having an arm portion on the side of a tractor body and two supporting shafts located in front and behind each other are respectively projected laterally and fixed in parallel,
A rod connected to the operating part is coupled to the base of the peckle, and the petal is biased in one direction by a return spring, and a vibration isolating rubber having a hole that elastically fits into the support shaft is fixed to the lower surface. A flat plate-shaped step is provided, and the step is inserted into the support shaft from the side while fitting the support shaft into the hole of the vibration isolating rubber of this step, and the arm portion of the petal is inserted into the vibration isolation rubber from below. A step attachment device for an agricultural tractor characterized by being joined to a swinging rubber.