JPH0516038Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention relates to a step support device for a tractor.

(B) Prior Art Conventionally, a driving step is provided between the steering wheel and the driver's seat, and an auxiliary step is provided at the lower side of the driving step, and a step bracket is used as a support member for the driving step, and also serves as an upper limit stopper for the clutch petal. Step support devices for tractors are already known.

(c) Problems to be solved by the invention Generally, various equipment such as hydraulic system piping or operating rods are arranged below the operating step of a tractor, but in the known tractor, in addition to the operating step bracket, Since there were many brackets for attaching spring holders and other parts,
The space for installing the various devices mentioned above becomes narrower,
Assembly work and maintenance or adjustment operations were difficult.

Furthermore, when the step bracket was used as the upper limit stopper of the clutch petal, the thin lower edge of the plate-shaped step bracket was used as the receiving surface, and the cushioning material was damaged within a short period of time.

Furthermore, if the operation step and the auxiliary step are formed separately, the lower cost increases, and the number of parts and assembly man-hours also increase.

(d) Means for solving the problem The present invention provides a tractor in which a driving step is provided between the steering handle and the driver's seat, and an auxiliary step is provided at the lower side of the driving step. A step bracket is formed integrally with the step, and a step bracket protrudes from the center case at the lower part of the operation step to both sides, and this step bracket is used as a receiving member for the operation step and the clutch petal return spring, and the lower part of the step bracket is formed in the front and rear directions. By bending in the direction to form a wide clutch petal upper limit stopper, costs can be reduced, and the step bracket can not only support the operating bracket, but also be used as a mounting member for other equipment. This reduces the number of steps, thereby ensuring sufficient piping space for the hydraulic system and tensioning space for operating members.Furthermore, a wide fold at the bottom of the step bracket is used to prevent damage to the cushioning material that cushions the impact when the clutch pedal returns. The above-mentioned problem was solved by preventing this by using the bent portion and by increasing the strength of the step bracket at the bent portion.

(e) Function The step bracket supports the operating step and also serves as a receiving member for the return spring of the clutch petal. Also, the cushioning material of the clutch petal is received by the wide bent part at the bottom of the step bracket, so damage to it is prevented. can, and
The bent portion contributes to increasing the strength of the step bracket, and the step bracket can be constructed from inexpensive, small and lightweight members.

(F) Embodiment An embodiment of the present invention will be explained about an agricultural tractor shown in the drawings. 1 has a clutch housing 2, an engine 3, and a steering handle 4 attached to the front part;
It is a center case in which a transmission case 5 is attached to the rear, front wheels 7, 7 are supported on a front axle case 6, and rear wheels 8, 8 are supported on a front axle case 6, and the center case is provided on the transmission case 5. Fenders 11, 11 are provided on the left and right sides of the driver's seat 10, a driving step 18 is provided between the steering wheel 4 and the driver's seat 10, and a clutch pedal 15 is provided near the front of the steering wheel.
and left and right brake pedals 16... are supported by a support shaft 17.

Further, the operation step 18 and the auxiliary step 20, which are provided at the lower part between the steering handle 4 and the driver's seat 10, and the auxiliary step 20 whose front part is narrowed are made by bending both sides of a single iron plate downward, and the lower end thereof is bent downward. The pair of left and right step brackets 21, 21, which are integrally formed by further bending outwards and protrude from both sides of the center case 1, form an inverted L shape when viewed from the side, and the lower part thereof The rearward bending part 22 is configured as a petal upper limit stopper, and the rubber cushioning members 23, 23 attached to the upper horizontal part are fixed with vertically protruding bolts 25 passing through them. The upper protrusion is inserted into the hole of the step brackets 21, 21 and tightened with a nut, and the upper protrusion is inserted into the hole of the receiver 26, 26 welded to the lower surface of the operating step 18, and tightened with a nut. clutch petal 1
5. Hook the upper part of the return spring 27... whose lower part is locked to a pin fixed to the base of the brake pedal 16, 16 into the small hole drilled in the step bracket 21, 21, and push the stepped pedal 15, 16 upward. At this time, the bent portion 22 is pressed against the cushioning material 2 fitted near the base of each petal 15, 16.
A mounting plate 30 is welded to the front lower part of the step bracket 21 on the left side, and an oil filter 31 is attached to this step bracket 21.
It is screwed on.

Furthermore, a receiving plate 34 having a cushioning material 33 is fixed to the rear surfaces of the front brackets 32, 32 protruding from both sides of the clutch housing 2, and the upper surface of the cushioning material 33 and the lower surface of the operating step 18 are connected to each other. A narrow gap _l1 is provided between the front brackets 32,3.
A support arm 35 hanging from the lower surface of 2 has a receiving piece 36 at the lower end.
A nut 37 is fixed to the lower surface of the nut 37, and a bolt 39 that is integral with the buffer material 38 is inserted into the hole of the receiving piece 36 and screwed into the nut 37, and the buffer material 38 is adjusted according to manufacturing and assembly errors. The height is adjustable, and a gap l ₂ is also provided between the cushioning material 38 and the auxiliary step 20, and these gaps l ₁ and l ₂ are formed when the driver steps on the driving step 18 or the auxiliary step 20. , they are slightly bent and the cushioning materials 33, 38
This prevents the driver from receiving a sudden shock.

Furthermore, both sides of the front part of the driving step 18 are screwed onto plates 40, 40 which are integral with the front brackets 32, 32, and the rear ear piece 41 is attached to the lower end of the front hanging part of the seat cover 42 which covers the lower part of the driver's seat. The rear part of the auxiliary step 20 overlaps the front of the lower end of the fenders 11, 11 and is fastened with bolts 43, 43, so the auxiliary step 20, which is made of a thin iron plate,
can be firmly installed and can be prevented from deforming.

In the agricultural tractor described above, operation step 1
8 and the auxiliary steps 20, 20 can be manufactured and assembled easily and inexpensively by press working from one iron plate, and the step brackets 21, 2 can be assembled easily and inexpensively.
1 not only serves as a petal upper limit stopper, but also serves as a locking member for the return springs 27 of each petal 15, 16, 16, a mounting member for the oil filter 31, etc., so that the number of brackets can be reduced and the operation step can be simplified. The lower space can be expanded to accommodate or adjust hydraulic system piping and various operating wires or rods.

(g) Effects of the invention The present invention provides a tractor in which a driving step 18 is provided between the steering handle 12 and the driver's seat 10 as described above, and an auxiliary step 20 is provided at the lower side of the driving step 18. The operation step 18 and the auxiliary step 20 are integrally formed, and a step bracket 21 is protruded from the center case 1 at the bottom of the operation step 18 to both sides, and this step bracket 21 is attached to the operation step 18 and the clutch petal return spring 27. Since the lower part of the step bracket 21 is bent in the front-rear direction to form a wide clutch petal upper limit stopper, the driving step 18 and the auxiliary step 20 can be integrally molded, making processing and assembly easier. However, the pedal can be received by the bent portion 22 at the bottom of the step bracket 21 that supports the operation step 18, and the cushioning material 28 of the petal can be prevented from being damaged. The strength of the step bracket 21 itself can be increased by the bent portion 22, and furthermore, the step bracket 21 can be used not only to support the operating step 18 but also to attach the return spring 27 of the petal and other members. The number of brackets can be reduced and the space under the operating step 18 can be effectively utilized, thereby making it possible to assemble and adjust hydraulic piping, operating rods, operating wires, etc., easily and easily.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention,
FIG. 1 is a partially cutaway side view of the main parts, FIG. 2 is a plan view of the same as above, FIG. 3 is an exploded perspective view of the step mounting portion, and FIG. 4 is a side view of the tractor. 1... Center case, 10... Driver's seat, 11
...Fender, 12...Steering handle, 15...
...Clutch petal, 16...Brake pedal, 1
8...Driving step, 20...Auxiliary step, 2
1...Step bracket, 22...Bending portion, 2
7...Return spring.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) In a tractor provided with a driving step 18 between the steering handle 4 and the driver's seat 10, and an auxiliary step 20 provided at the lower side of the driving step 18, the driving step is 18 and auxiliary step 2
A step bracket 21 is made to protrude from the center case 1 at the bottom of the driving step 18 to both sides, and this step bracket 21 serves as a receiving member for the driving step 18 and the clutch petal return spring 27. A step support device for a tractor, characterized in that the lower part of the step bracket 21 is bent in the longitudinal direction to form a wide clutch petal upper limit stopper. (2) The step support device for a tractor according to claim 1, wherein the step bracket is integrally provided with an oil filter mounting portion.