JPH0534999Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a work vehicle such as a riding lawnmower or a tractor, which has a brake pedal and a speed change pedal arranged in front of the driver's seat.

[Prior art]

Conventionally, in work vehicles such as riding lawn mowers, the brake pedal and the gear shift pedal have been placed in front of the driver's seat, separated into left and right sides.

[Problem that the invention attempts to solve]

Since the brake pedal and the gear shift pedal are placed in front of the driver's seat on the left and right, it is possible to accidentally press the gear shift pedal while still pressing the brake pedal. There were inconveniences that caused damage and engine stoppage.

Therefore, as a means to eliminate the above-mentioned drawbacks, the gear shift pedal cannot be operated when the brake pedal is operated, and the brake pedal cannot be operated when the gear shift pedal is operated. It is conceivable to provide a check mechanism.
However, with this configuration, the check mechanism must be installed in a cramped space where the operation system from the brake pedal to the brake device and the operation system from the speed change pedal to the speed change device are complicated. There are disadvantages in that assembly is troublesome and the structure is complicated.

The present invention aims to eliminate the above-mentioned drawbacks through simple structural improvements, as well as successfully solve the new problems that arise as a result.

[Means for solving problems]

The characteristic configuration of the present invention for achieving the above object is that a brake pedal and a speed change pedal are disposed in front of the driver's seat and on one side in the left-right direction of the aircraft from the center of the seat, and further, The reason is that the brake pedal is located further to the outside of the aircraft than the gear shift pedal.

[Effect]

Since the brake pedal and the gear shift pedal are operated alternatively, there is no possibility that the brake pedal and the gear shift pedal are operated at the same time, resulting in a situation where, for example, the vehicle accelerates while braking is applied. .

When arranging the brake pedal and the gear shift pedal on one side of the driver's seat, the brake pedal, which is generally arranged on the left side of the driver's seat, is
If the transmission pedal is placed close to the left side of the gear shift pedal, which is located on the right side of the driver's seat, a new problem arises: the driver must squeeze his or her feet together to operate the brake pedal, which has a large operating resistance, making it difficult to operate the brake pedal. However, by arranging the speed change pedal on the inside and the brake pedal on the outside, it becomes easier to operate the brake pedal, which has a large operating resistance.

[Effect of idea]

As a result of the above configuration, early damage to the brake, engine stop, etc. can be prevented.

Furthermore, although the pedals are placed on one side of the driver's seat in the left-right direction, the brake pedal, which has a large operating resistance, is placed further to the outside of the aircraft than the gear shift pedal. Therefore, the brake pedal is located at a location where it is easier to exert a larger force as the toes of the foot are opened, so the brake pedal can be depressed more strongly and unexpected accidents caused by less gentle braking operation can be suppressed.

Furthermore, by arranging pedals on either side of the driver's seat, it is possible to get on and off from the other side where there are no pedals, making it easier to get on and off.

〔Example〕

Hereinafter, embodiments of the present invention will be described based on the drawings.

FIG. 6 shows a lawn tractor as an example of a working vehicle according to the present invention.
In addition to providing a control handle 4 at the rear of the aircraft,
A machine body having a control section 7 equipped with a driver's seat 5 and a left and right flat deck 6 is supported by front and rear wheels 8 and 9 so as to be able to run, and a mower 10 as a working machine is installed at an intermediate position between the front and rear wheels 8 and 9. Arrange this moa 10
The vehicle includes a grass collection duct 11 and a grass collection container 12 located between the left and right rear wheels 9 and extending rearward.

As shown in FIG. 4, the front part of the bonnet 1 is formed with a horizontally long label sticking part 23 that is substantially straight at the top and bottom and curved in the horizontal direction, and a strip-shaped label 24 can be easily stuck to the surface of this horizontally long label sticking part 23. It is now possible to do so.

The details of the transmission system are shown in Figures 2, 3 and 6.
As shown in the figure, output pulleys 14 and 15 are fitted in two stages, upper and lower, on the downward output shaft 13 of the engine 2, and the lower output pulley 15 and the mower 1
An input pulley 16 fitted onto the input shaft of the input shaft 0 is interlocked with a belt 17 to constitute a working device transmission mechanism. On the other hand, the input pulley 20 of the transmission case 19 is connected to the upper stage output pulley 14 via the belt type continuously variable transmission 18.
A traveling transmission system is configured to be able to drive rear wheels 9, 9 which are interlocked and connected at 2 and which are pivotally supported at the lower end of this transmission case 19.

Among the belts 21 and 22, the output pulley 1
4 and the continuously variable transmission 18, a clutch 26 is attached to the belt 21, which has a tension pulley 25 that is in the engaged state due to spring bias. A brake 27 is attached to the brake 19, which is configured to be normally in a brake-released state by being biased by a spring.

Next, the gear change operation structure and brake clutch operation structure of the loan tractor will be explained.

As shown in FIG. 2, a speed change pedal 37 is provided on the lower right side of the driver's seat 5, and this speed change pedal 37 is linked to a speed change lever 38 of the continuously variable transmission 18 via a link mechanism 39. By stepping forward on the speed change pedal 37, the speed change lever 38 swings around the vertical axis _P1 to increase speed.

In addition, the clutch 26 is placed in the disengaged state by pressing the button in one step on the right side of the lower part of the driver's seat 5.
A brake pedal 31 is provided that can freely swing up and down about a horizontal axis _P2 , which brings the brake 27 into a braking state by successive two-step depression operations.

The brake pedal 31 is located laterally outward of the vehicle body than the speed change pedal 37.

To explain the details, as shown in FIG.
An operating shaft 33 is rotatably installed between 2 and 32. A boss 34 of the brake pedal 31 is integrally fitted to the right end of the operating shaft 33,
A bracket 35 connected to the brake 27 and a bracket 36 connected to the clutch 26 are fixed to the left end of the operating shaft 33, respectively.

A clutch actuating rod 43 that retracts the tension pulley 25 of the clutch 26 to disengage the clutch is engaged with a pin in the bracket 36, and a clutch actuating rod 43 that is provided on the side of the transmission case 19 is engaged with the bracket 36. broken brake 27
A connecting member 30 connected to the operating arm 28 is engaged with a pin. A long hole 54 is bored in this operation arm 28, and the end of the connecting member 30 is inserted into the long hole 54.
It is pin-engaged therein and is flexibly connected via a compression spring 29.

Then, the engagement position of each pin and the operating arm 2
8, when the brake pedal 31 is depressed and operated to a depth of one step, the brackets 35 and 36 rotate around the operating shaft 33, and the clutch 26 is rotated against the biasing spring 53. The tension pulley 25 is retracted in a direction that weakens the pressure on the belt 21, allowing the clutch 26 to disengage. When the brake pedal 31 is subsequently depressed, the spring member 29 is compressed as shown in FIG. 3, and the brake operating arm 28 is operated via the connecting member 30, thereby causing the brake 27 to perform a braking action.

On the other hand, as shown in FIG. 3, a boss 49 is rotatably fitted onto a shaft 44 installed in the transverse direction of the fuselage, and an L-shaped link 45 is attached to this boss 49.
The distal end of the connecting member 30 is flexibly connected to one end of this link 45 via a pin 46, and a parking brake operating rod 47 is pivotally connected to the other end. By pulling the brake operating rod 47 upward, the connecting member 30 can be moved forward and the brake 27 can be manually operated. Further, a parking brake lock pawl 48 is fixed to the boss 49, and is biased forward by a spring 50. Further, an L-shaped locking tool 52 is welded and fixed to the side surface of the bracket 35, and when the parking brake operating rod 47 is pulled upward while the brake pedal 31 is depressed, the locking tool 52 is locked into the locking pawl 48. By engaging the brake pedal 31, the brake pedal 31 can be reliably locked.

In addition, when the above-mentioned lawn tractor is equipped with a hydrostatic continuously variable transmission 55, as shown in FIG. However, since the operating shaft 33 is installed across the left and right sides of the machine as described above, the brake 27 is connected to the bracket 35 provided at the left end of the operating shaft 33 via a connecting member. By doing so, it is possible to switch to a type equipped with the hydrostatic continuously variable transmission 55 relatively easily without assembling new members.

Note that although reference numerals are written in the claims section of the utility model registration for convenience of comparison with the drawings, the present invention is not limited to the structure of the attached drawings by such entry.

[Brief explanation of the drawing]

The drawings show an embodiment of the clutch brake operation structure for an agricultural vehicle according to the present invention, in which FIG. 1 is a longitudinal sectional rear view of the main part, FIG. 2 is a plan view of the main part, and FIG. 3 is a longitudinal sectional side view of the clutch brake. FIG. 4 is a longitudinal sectional side view of the bonnet, FIG. 5 is an explanatory view of the vehicle equipped with a hydrostatic continuously variable transmission, and FIG. 6 is an overall side view of the lawn tractor. 5... Driver's seat, 31... Brake pedal, 37
...shift pedal.

Claims (1)

[Scope of utility model registration request] This is an operation structure for operating a work vehicle in which a brake pedal 31 and a gear shift pedal 37 are arranged in front of the driver's seat 5, and the brake pedal 31 and the gear change pedal 37 are arranged in front of the driver's seat 5 and in the left-right direction of the machine body than the center of the seat. The brake pedal 31 and the speed change pedal 37 are disposed on one side, and the brake pedal 31 is connected to the speed change pedal 37.
The operation structure for operating the work vehicle is located closer to the outside of the aircraft.