JPS625950Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a clutch operating device for a forward-reverse vehicle, in which a rear clutch pedal and a clutch operating system on the opposite side are linked with each other using a simple structure.

In some vehicles such as tractors, the mounting positions of the steering wheel and the driver's seat are changed between front and rear, so that the vehicle can be driven in either a forward or rearward position. In this type of vehicle, the front clutch pedal for forward operation and the rear clutch pedal for rearward operation must be provided on both sides of the vehicle body, and distributed to the front and rear, but since the clutch operating system linked to the clutch is on the same side as the front clutch pedal, the rear clutch pedal and the clutch operating system must be linked to each other across the vehicle body. However, if the vehicle body is composed of a transmission case or the like, the position where the pedal shaft can be inserted is greatly limited in order to avoid interference with the transmission mechanism inside the case, and it is very difficult to select the optimal position for operation and provide the rear clutch pedal.

The present invention was provided for the purpose of solving these problems, and its feature is that it has a front clutch pedal for forward operation and a rear clutch pedal for rearward operation. In a vehicle in which a clutch operating system is provided on both sides of the vehicle body and is provided on the same side as the front clutch pedal, an interlocking arm that interlocks with the clutch operating system is provided opposite to the rear clutch pedal and is swingable back and forth, This interlocking arm and the rear clutch pedal are interlocked above the vehicle body.

Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments. In FIGS. 1 to 5, 1 is a tractor body, which is composed of an engine 2, a clutch housing 3, a transmission case 4, etc., and the engine 2 is a bonnet. It is crowned by 5. On both rear sides of the transmission case 4, there is a brake case 7L, which houses hydraulic brake devices 6L and 6R.
7R, rear axle case 8L, 8R and rear axle 9L,
Rear wheels 10L and 10R are provided via 9R, respectively. Reference numeral 11 denotes a hydraulic system for lifting and lowering the working machine, and has a pair of left and right lift arms 12L, 12R, and the hydraulic system 11 is mounted on the mission case 4. Reference numeral 13 denotes a driver's seat, which can be changed in position for forward operation and rearward operation, and is mounted on the hydraulic system 11 between the pair of left and right rear wheel fenders 14L and 14R during forward operation, and on the bonnet during rearward operation. 5, respectively. 15 is the handle, 16
is a handle post that supports the handle 15,
It is detachably attached to a mounting base 17 on the clutch housing 3 during forward operation, and to a mounting base 18 on one side of the hydraulic device 11 during rearward operation. 19
L and 19R are a pair of left and right steps, which are provided approximately in the center of the tractor body 1 in the longitudinal direction. 2
0L and 20R are a pair of left and right front brake pedals for forward operation, which are pivotally supported by pedal shafts 21L and 21R below the right step 19R so as to be able to swing up and down, and are supported in the return direction by return springs (not shown). is energized by The pedal shafts 21L, 21R have a double shaft structure, and are supported laterally on the lower abdomen of the tractor body 1.
Brake levers 22L and 22R are on the left end of 1R.
are arranged in a criss-cross pattern. 23L and 23R are a pair of left and right rear brake pedals for rearward operation;
It is supported by a pedal shaft 24 at a rear position opposite to 20R. The pedal shaft 24 is laterally inserted and supported across a fitting portion 25L formed on the brake case 7L and a support plate 28 fastened to a mounting portion 26L of the rear axle case 8L with bolts 27. It is fixed to the support plate 28 with a bolt 30 via a retaining piece 29, and the boss portion 31 of the rear brake pedals 23L, 23R is attached to this pedal shaft 24.
L and 31R are fitted. The rear brake pedals 23L, 23R are respectively connected to brake levers 22L, 22R via a pair of left and right brake rods 32L, 32R arranged in parallel.
Therefore, the front brake pedals 20L, 20R and the rear brake pedals 23L, 23R are reversely interlocked with each other via the brake rods 32L, 32R, etc. In addition, each brake pedal 20L, 20R, 23
L and 23R are connected by a connecting member not shown. Can be canceled at will. 33L and 33R are each brake device 6
This is a master cylinder for supplying pressure oil to the rear brake pedals 23L and 6R, and is installed side by side on the mounting plate 34.
Each is connected to 3R. The mounting plate 34 has both left and right ends fixed to the support plate 28 and a support plate 36 fitted onto the pedal shaft 24, and the support plate 2
8 and 36 are connected and reinforced by an intermediate reinforcing plate 37. Reference numeral 38 denotes a front clutch pedal for forward operation, which is supported by the pedal shaft 21 below the left step 19L so as to be able to swing up and down via a boss portion 39, and elastically supported by a return spring in the figure. Two levers 40 and 41 are fixed to the boss portion 39, and one of the levers 40 is connected to a clutch operating system 4 such as a clutch rod 42 and a clutch lever 43.
Clutch 4 in clutch housing 3 via 4
It is linked to 5. Reference numeral 46 denotes a rear clutch pedal for rearward operation, which is supported by a pedal shaft 47 at a rear position on the opposite side of the tractor body 1 from the front clutch pedal 38. The pedal shaft 47 is located on the same axis as the pedal shaft 24, and is supported by a fitting portion 25R formed on the brake case 7R and a mounting bracket 48. A boss portion 49 of the rear clutch pedal 46 is attached to this pedal shaft 47. It is covered. The mounting bracket 48 is fixed to the pedal shaft 47 and is attached to the mounting portion 26R of the rear axle case 8R with bolts 50. The rear clutch pedal 46 is biased by a return spring 70 so as to come into contact with the stopper 51, and an interlocking arm 52 is fixedly attached to an intermediate portion of the rear clutch pedal 46 so as to project above the hydraulic device 11. has been done. . Reference numeral 53 denotes an interlocking arm that is disposed opposite to the interlocking arm 52 with the tractor body 1 in between, and is swingably supported by the pedal shaft 24 via a boss portion 54, and, like the interlocking arm 52, is connected to a hydraulic system. It is curved so as to protrude above 11,
At opposing ends of these interlocking arms 52, 53, semicircular engagement portions 55, 5 are provided which engage back and forth so as to transmit operating force from the arm 52 side to the arm 53 side.
6 is notched. A lever 57 is fixed to the boss portion 54, and this lever 57 is connected to the interlocking rod 5.
Lever 4 on the front clutch pedal 38 side via 8
Therefore, the clutch 45 can be engaged and engaged not only by the front clutch pedal 38 but also by the rear clutch pedal 46.

In the above configuration, brake operation during forward driving is performed using the front brake pedals 20L and 20R,
Brake operation when driving backwards is performed using rear brake pedals 23L and 23R. Now, when you depress the front brake pedals 20L and 20R, the pedal shaft 2
1L, 21R, brake lever 22L, 22R,
Since the rear brake pedals 23L and 23R swing around the pedal shaft 24 in the direction of arrow a through the brake rods 32L and 32R, the piston rod 35
Master cylinders 33L, 33 via L, 35R
The R piston is pressed, and the master cylinder 33
Pressure oil flows from L and 33R to each brake device 6L and 6R.
and later brakes 10L and 10R, respectively. Then, when the pedal force is released, the front brake pedals 20L, 20R are returned to their original positions by the return springs, so that the brake devices 6L, 6R release the braking. The same applies to the operation of the rear brake pedals 23L and 23R, so the front brake pedal 20
L, 20R and rear brake pedals 23L, 23R
The same master cylinder 33L, 3
This will activate 3R. In this case, since the brake levers 22L and 22R are configured in a crossed manner, when operated independently, the brake devices 6L and 6R on the operated side of the pair of front and rear brake pedals can be operated.

Clutch operation during forward driving is performed using the front clutch pedal 38. That is, when the front clutch pedal 38 is depressed, the clutch 45 is disengaged via the clutch operating system 44. At this time, interlocking rod 5
8, the interlocking arm 53 only swings around the pedal shaft 24 in the direction indicated by arrow a, and the rear clutch pedal 46 does not operate at all. Clutch operation during backward driving is performed using the rear clutch pedal 46. When the rear clutch pedal 46 is depressed against the return spring 70, the interlocking arm 53 swings around the pedal shaft 24 in the direction indicated by the arrow a, via the engaging portion 55 and the engaging portion 56 of the interlocking arm 52. Interlocking rod 58
, the clutch 45 is disengaged via the clutch operation system 44. In this case, since the axes of the pedal shafts 24 and 47 are aligned, the engagement surfaces of the engagement portions 55 and 56 may be kept to the minimum necessary extent, and they will not come apart from each other during rocking. Note that at this time, the front clutch pedal 38 also operates in an interlocking manner, but this interlocking operation may be cut off.

FIG. 6 shows another embodiment, in which the master cylinder 3
The mounting plates 60 of the pedals 3L and 33R are formed in an L-shape when viewed from the side, and the mounting bracket 61 of the pedal shaft 24 is formed into a U-shape when viewed from the front. They are fastened together with bolts 62. Also, the boss parts 31L and 31R of the rear brake pedals 23L and 23R
is between the mounting brackets 61, and the boss portions 54 of the interlocking arms 53 are respectively fitted onto the pedal shafts 24 on the outside of the mounting brackets 61. The pedal shaft 47 is supported by a mounting bracket 63 in a cantilevered manner.
Each support structure can also be configured in this way. Further, the rear brake pedals 23L, 23R and the rear clutch pedal 46 can be made of round bar pedal stems as shown in FIG. It may also be installed horizontally as shown.

In this invention, an interlocking arm that interlocks with the clutch operation system is provided so as to be able to swing back and forth, facing the rear clutch pedal, and this interlocking arm and the rear clutch pedal are interlocked above the vehicle body, so that the clutch operation system and the rear Even though the clutch pedal and the clutch pedal are in the opposite direction across the vehicle body, they can be easily linked together, and there is no need to penetrate the pedal shaft through the vehicle body, so the rear clutch pedal can be placed in the optimal position for operation. It is possible to provide

[Brief explanation of the drawing]

Fig. 1 is a side view of the rear of a tractor showing an embodiment of the present invention, Fig. 2 is a schematic plan view of the same, Fig. 3 is a cutaway side view of the main parts, and Fig. 4 is a cutaway front view of the main parts. ,
FIG. 5 is a side view of the same main part, and FIG. 6 is a front view of the main part showing another embodiment. 1... Tractor body, 6L, 6R... Brake device, 11... Hydraulic system, 20L, 20R... Front brake pedal, 21L, 21R, 24, 47
... Pedal shaft, 23L, 23R ... Rear brake pedal, 32L, 32R ... Brake rod, 3
3L, 33R...Master cylinder, 38...Front clutch pedal, 44...Clutch operation system, 45
...Clutch, 46...Rear clutch pedal, 5
2,53...Interlocking arm.

Claims (1)

[Scope of utility model registration request] In a vehicle that is equipped with a front clutch pedal for forward operation and a rear clutch pedal for rearward operation, distributed on both sides of the vehicle body, and a clutch operation system provided on the same side as the front clutch pedal, the clutch operation system A clutch operation device for a forward-reverse vehicle, characterized in that an interlocking arm is provided opposite a rear clutch pedal and is swingable back and forth, and the interlocking arm and the rear clutch pedal are interlocked above the vehicle body.