JPS61188234A - Change gear lever of agricultural tractor - Google Patents

Abstract

PURPOSE:To widen the space of the foot, improve the living condition of an operator, and eliminate an interference to his getting on and off, by furnishing the rotating base of a change gear lever at the side of a transmission case backward from the step. CONSTITUTION:The rotating base of a change gear lever 1 is furnished at the side of a transmission case backward from the step 29, and the handle of the lever 1 is positioned at the side forward the seat 26. A deaf lock pedal 28 is furnished further inside from the lever 1 and a PTO change gear lever, the petal 28 is fixed through a rotating axis 34, and at the intermediate point of the petal 28 are screwed up a lower rotation limit stopper bolt 33 and a lower rotation limit stopper plate 15. Furthermore, the lever 1 and the PTO change lever are installed at the side of the transmission case rotatable, and the bracket member of a change gear support case 3 is fixed at the side of the case 3.

Description

[Detailed description of the invention] (a) Industrial application field The present invention improves the comfort around the seat of an agricultural tractor,
This invention is also intended to improve the operability of various levers operated by an operator.

(B) Prior Art Many inventions have been filed in the past for improving the comfort around the seat of agricultural tractors, as well as improving the operability of various operating levers.

For example, there is a known technique such as Utility Model Application Publication No. 56-113029. However, in these conventional technologies, the operating levers such as the gear shift lever are located on the side of the seat, and from an engineering perspective, the gear shift lever is located in a place where there is not much operating force and it is difficult to rotate. be. However, if this is placed towards the front of the seat, it may get in the way of the steps.
There were problems such as it becoming an obstacle when getting on and off.

(C) Problems to be Solved by the Invention The purpose of the present invention is to arrange the gear shift lever so that it does not come between the operator's thighs, and to position it at the side and front where it is easy to operate even if it is on the side of the seat. Even so, the structure is such that the base of the gear shift lever is not placed on the step or in a position where it will get in the way when getting on and off the vehicle.

(2) Means for Solving the Problems The objects of the present invention are as described above, and the configuration for achieving the objects will be explained below.

The rotating base of the gear shift lever of the agricultural tractor is located on the side of the transmission case behind the step, and the handle portion 1a of the gear shift lever is placed on the front side of the seat.

(E) Embodiments and Functions The objects and structure of the present invention are as described above. Next, the functions of the present invention will be explained based on the structure of the embodiments shown in the attached drawings.

Figure 1 is a side view of the agricultural tractor's step and seat area, Figure 2 is a rear view, and Figure 3 is a differential lock pedal 2.
8 is a plan view, FIG. 4 is a side view, and FIG. 5 is a front view of the dustproof cover 30.

The overall configuration will be explained from FIGS. 1 and 2.

26 is a seat on which the operator sits and places his feet on a step 29. In the present invention, the step 29 is flat from the right end to the left end, and has a step-through type in which left and right steps are continuous.
9 and is connected to the dustproof plate 30 and the under-seat cover 31.

In the present invention, the rotational base of the gear shift lever 1 is located on the side of the transmission case 13 and behind the step 29, and the handle portion 1a of the gear shift lever 1 is located on the side in front of the seat 26. This is what I did. 27 is dustproof plate 3
It is a bellows rubber provided at 0. Further, 18 is a bellows rubber provided on the gear shift lever support case.

In FIG. 1, a differential lock pedal 28 is provided further inside the speed change lever 1 and the PTO speed change lever 2, and this is shown. The differential lock pedal 28 has a pivot shaft 34
The rotation lower limit stopper bolt 33 is pivotally supported in the middle,
It is screwed onto the rotation lower limit stopper plate 15. and,
When the differential lock pedal 28 is depressed, the rotation lower limit stopper port 33 comes into contact with a part of the shift lever support case 3, thereby reaching the lower rotation limit. Since it is a combination of a bolt and a fixed nut, the lower limit can be adjusted by loosening it. Further, the rotation lower limit stopper plate 15 also serves as an operating piece for operating the indicator light switch 32 for the differential lock. 20 is a reverse light switch, and change arm 4
The rib that protrudes from a part of the lamp is actuated by the actuating valve 4a, which lights up when the gear is shifted to reverse.

A gear shift lever 1 and a PTO gear shift lever 2 are pivotally supported on the side surface of a mission case 13. Gear shift lever support case 3
The bracket portion 3a is fixed to the side surface of the transmission case 13, and the mounting position of the case 3 with the gear shift lever support 5 is located behind the step 29.

A pivot shaft 11114 is provided in the shift lever support case 3, and the change arms 4 and 5 are supported in parallel on this pivot shaft 14. Then, the tip of the shift lever 1 is fitted into the recess at the upper end of the change arms 4 and 5, and by rotating left and right, one of the change arms 4 and 5 is selected, and by rotating back and forth, the change arms 4 and 5 are moved back and forth. It rotates around the pivot shaft 14. Links 6 and 7 are pivotally connected to the arms 4b and 5b of the change arms 4 and 5, and the ends of the links 6 and 7 are connected to the arms 9 and 10 of the speed change operation shafts 12 and 11.
It is pivotally connected to.

As shown in Fig. 2, in order to move the shift lever 1 far away from the transmission case 13, the shift lever support case 3 is largely protruded, and links are provided to connect this protruding position with the arms 9 and 10 of the shift operation shafts 12 and 11. 6 and 7 are connected by bending them into a crank shape.

The rotation lower limit stopper plate 15, on which the positional relationship of the differential lock indicator light step 32 is clearly indicated, also serves as an operating piece for the differential lock indicator light switch 32.

By arranging the differential lock indicator light switch 32 in such a position, it can be protected from water and obstacles. In addition, the rotation lower limit stopper plate 15 and the differential lock indicator light switch 32 are also used as actuating pieces, and in FIG.
8, the differential lock pedal 28 is located at the bottom of the position □ near the seat, the PTO gear shift lever, which is not used very often, is located above the next closest position, and the operator The gear shift lever 1 is placed at a position where it is easy to apply force with the arm of the user. It goes without saying that the shift lever 1 has a large number of gear shifts, and is operated in two directions: left and right and front and rear, so it is placed outside and in front of the seat where it is most likely to be exerted force.

(f) Effects of the Invention The present invention, configured as described above, provides the following effects.

First, because the pivoting base of the gear shift lever 1 is located at the rear of the step, there is a large space for the feet, which improves the comfort of the operator, and it does not get in the way when getting on and off the vehicle.

Second, by placing the handle portion 1a of the gear shift lever 1 in front of the side of the seat 26, you can operate it by putting your weight on it when turning from side to side or front to back, compared to when it is located directly next to the seat, which improves ergonomics. This allows for a comfortable arrangement.

Thirdly, in agricultural tractors, it can be placed in a position that does not interfere with the hydraulic lever for raising and lowering the work equipment, which is usually placed on the right side.

[Brief explanation of the drawing]

Figure 1 is a side view of the agricultural tractor's step and seat area, Figure 2 is a rear view, and Figure 3 is a differential lock pedal 2.
8 is a plan view, FIG. 4 is a side view, and FIG. 5 is a front view of the dustproof cover 30. ■...Speed lever 1a...Handle part 2...P
TO gear shift lever 3...Shift lever support case 13...Mission case

Claims (1)

[Claims] An agricultural tractor characterized in that the rotating base of the gear shift lever of the agricultural tractor is located on the side of the transmission case behind the step, and the handle part 1a of the gear shift lever is arranged to be on the front side of the seat. Gear shift lever device.