JPS6222424Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention includes a steering clutch built into a differential case, and a braking device built into a transmission case connected to the lateral side of the differential case, with their rotational axes oriented in the left-right direction of the vehicle body. A steering operation tool disposed above the rear of the driving step and having an operating end located below the driving step and swingable in the longitudinal direction of the vehicle body is interlocked with the operated lever of the steering clutch. The present invention relates to a simple steering clutch/brake operation structure for a transport vehicle in which a brake pedal that is swingable in the vertical direction of the vehicle body and whose operating end is located below the driving step is interlocked and connected to an operated lever of the braking device. The purpose of the modification is to eliminate problems with the arrangement and to make steering operations easier.

Next, embodiments of the present invention will be described in detail based on the drawings.

For the left and right traveling devices 2, 2 each having four wheels 1 on each side, a control section 3 and a traveling power transmission structure 4 are placed side by side on the front side thereof, and a hydraulic cylinder 5 is installed at the rear thereof. A dump truck 6 is provided, which is swingable around a horizontal axis, and constitutes a transport vehicle that controls the transportation and discharge of loaded loads.

To configure the transmission structure 4, an engine 7 whose output shaft is oriented in the longitudinal direction of the vehicle body is mounted on one side of the control section 3, and a case 9 inside the transmission is connected to the engine 7 via a clutch housing 8. and a transmission shaft 14 having an input shaft 13 of the transmission mechanism 11 protruding rearwardly of the transmission case 9. The steering clutches 16, 16 are connected to the transmission case 9 in a state of interlocking with the output shaft 10, and are connected to both ends of the output shaft 10, and are operated intermittently by the swinging of the operated member 15 about the shaft 10. A braking device 18 that is installed and operated by rotation of the operated member 17 around an axis in a direction perpendicular to the rotational axis, and a wheel transmission mechanism interlocked with the braking output shaft 19 thereof. The left and right transmission cases 21, 21 each have a transmission case 20 therein, the rotational axis of the braking device 18 is concentric with the rotational axis of the output shaft 10, and the input side member 22 of the braking device 18 is arranged in a clutch case. 16
The differential case 12 is connected to both sides of the differential case 12 in a state where it is interlocked and connected to the differential case 12.

In configuring the operation structure of the steering device using the left and right braking devices 18 and the clutch 16, a member 2 that engages with the free end side of the operated member 15 of the clutch 16 is provided.
3 is installed inside the differential case 12 so as to be rotatable around an axis in a direction parallel to the swing axis of the operated member 15, and a member 24 that engages with the engagement member 23.
is attached to a shaft 25 extending through the differential case 12 so as to face in the left-right direction of the vehicle body, and an operated lever 26 is provided at the end of the shaft 25 projecting outward from the differential case 12 to rotate the shaft 25. Accordingly, the rotational motion is converted into a swinging motion in the longitudinal direction of the vehicle body, and the operated member 15 is operated to swing.

A member 27 that engages with the operated member 17 of the braking device 18 is connected to a shaft 28 extending through the transmission case 21 while facing in the left-right direction of the vehicle body, and protrudes outward from the case 21. An operated lever 36 is provided at the end of the shaft 28, and a portion of the transmission case 21 below the lever supporting rotary interlocking shafts 25, 28 located above the rear with respect to these operation steps 29 is provided with a lever 36 that is connected to the left and right of the vehicle body. A relay shaft 30 is provided which is rotatable around the directional axis.

On the other hand, the brake pedal 31 and the left and right steering operating tools 32 are placed in front of the driving step 29, with their operating ends positioned below the step 29.
32 is provided so as to be swingable in the longitudinal direction of the vehicle body, and
The operating rod 33 of the interlocking mechanism A, which is linked to the left and right steering operating tools 32, 32, respectively, is connected to the relay shaft 30.
Pivotally connected to a lever 34 loosely fitted to the lever 34, and
This lever 34 and the operated lever 2 for the steering clutch
6 are pivotally connected by a rod 35.

Further, a lever 37 is fixed to one end of the relay shaft 30, and the lever 37 and the operated lever 36 for the braking device are pivotally connected by a rod 38, and a lever 39 is fixed to the other end of the relay shaft 30. is fixed at its intermediate portion, and the upper portion 39A of this lever 39 is
and the relay lever 34, the relay shaft 3
an adjustment bolt 40a that is provided with an interlocking mechanism 40 that rotates the lever in the braking action direction, and that makes this interlocking mechanism 40 come into contact with the lever upper portion 39A;
The operating rods 41, 41 of the interlocking mechanism B, which is composed of a fixing nut 40b and linked to the brake pedal 31, are connected to the lower lever portion 39B through the elongated hole a that allows the clutch to be operated;
In addition, there is a state in which only the brake devices 18, 18 are operated by depressing the pedal 31, and a state in which the left and right steering clutches 1 are operated by pressing the pedal 31.
6, 16 and brakes 18, 18 in that order, and select the left and right ones, and operate the steering operation tools 32, 3.
2, it is possible to take an operating state.

In summary, the present invention provides a steering clutch/brake operation structure for a transport vehicle as described above, in which the rotary interlocking shaft 25 supporting the operated lever 26 of the steering clutch 16 and the operated lever 36 of the braking device 18 are combined. The differential case 12 and the transmission case 21 are connected to each other with the supported rotational interlocking shaft 28 facing in the left-right direction of the vehicle body.
The braking device 18
A rotation interlocking shaft 28 that supports the operated lever 36 is projected toward the lateral outer side of the aircraft body on the side opposite to the differential case 12, and a relay lever 34 that interlocks the steering operation tool 32 and the operated lever 26 is provided. The relay lever 37 that interlocks the brake pedal 31 and the operated lever 36 is connected to the two rotation interlocking shafts 25 and 28.
It is characterized by being attached to both the left and right sides of the relay shaft 30 which passes through the transmission case 21 in the left and right direction of the vehicle body at a lower position than the transmission case 21.

That is, the rotation interlocking shaft 25 supporting the operated lever 26 of the clutch and the operated lever 3 of the braking device
By orienting the rotation interlocking shaft 28 that supports 6 in the left-right direction of the vehicle body, the steering operation tool 32 that is operated to swing in the longitudinal direction of the vehicle body and the brake pedal 31 that is operated to swing in the vertical direction of the vehicle body are prevented from becoming distorted. The steering clutch 16 and the braking device 18 can be engaged and engaged lightly and smoothly without any friction, and both the operated levers 26 and 36 located above the rear with respect to the driving step 29 can be operated easily and smoothly. The operating ends of the steering operating tool 32 and the brake pedal 31 located at the lower front are connected to both the relay levers 34 and 37.
For example, by connecting the step 29 in a bypass manner on or near the upper surface of the step 29, for example,
Compared to a structure in which the steering operating tool 32 and the operated lever 26 as well as the brake pedal 31 and the operated lever 36 are directly interlocked and connected in a state where they intersect the step 29 in a side view, there is a possibility that the steering operation tool 32 and the operated lever 36 are interlocked and connected. This makes it easier to avoid problems with placement.

Moreover, the relay levers 34 and 37 are attached to both left and right sides of the relay shaft 30 that passes through the transmission case 21 in the left-right direction of the vehicle body, and the rotation interlock shaft 28 that supports the operated lever 36 of the braking device is mounted opposite to the differential case 12. The braking device operation transmission system and the clutch operation transmission system are arranged on both sides of the transmission case 21, protruding outward from the sides of the fuselage. A rotation interlocking shaft 2 that is attached to the same side as the lever 34 and supports the operated lever 36 of the braking device.
8 protrudes toward the differential case 12 side, and the operation transmission system of the braking device and the operation transmission system of the clutch are connected to the transmission case 2.
There is no mutual interference between both operation transmission systems as in the case where they are arranged off to one side of 1, and both relay levers 34 and 37 are attached to one side of the relay shaft 30 to support both operation transmission systems. As in the case where a large deflection load is applied to the relay shaft 30, the relay shaft 30 undergoes deflection deformation. Or, to prevent this, relay shaft 3
Inconveniences such as configuring 0 to be thick can be avoided.

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 steering clutch/brake operation structure for a transport vehicle according to the present invention, in which FIG. 1 is a side view of the transport vehicle, FIG. 2 is a schematic plan view of the operation structure, and FIG.
4 is a sectional view of the clutch and brake, FIG. 5 is a sectional view taken along the line -- in FIG. 4, and FIG. 6 is a sectional view taken along the line -- in FIG. 4. 12... Differential case, 16... Steering clutch, 18... Braking device, 21... Transmission case, 2
5, 28... Rotation interlocking shaft, 26, 36... Operated lever, 29... Driving step, 30... Relay shaft, 31... Brake pedal, 32... Steering operation tool,
34, 37...Relay lever.

Claims (1)

[Scope of utility model registration request] A steering clutch 16 inside the differential case 12,
A braking device 18 built into a transmission case 21 connected to a side portion of the differential case 12 is disposed above the rear of the driving step 29 with its respective rotation axes facing in the left-right direction of the vehicle body, and is located below the driving step 29. The steering operating tool 32, which is swingable in the longitudinal direction of the vehicle body and whose operating end is located at the front and back of the vehicle, is interlocked and connected to the operated lever 26 of the steering clutch 16, and the operating end is located below the driving step 29. A steering clutch/brake operation structure for a transport vehicle in which a brake pedal 31 that can freely swing in the vertical direction of the vehicle body and an operated lever 36 of the braking device 18 are interlocked and connected,
The differential case 12 and the transmission case 21 are placed in a state in which the rotational interlocking shaft 25 supporting the operated lever 26 of the steering clutch 16 and the rotational interlocking shaft 28 supporting the operated lever 36 of the braking device 18 face in the left-right direction of the vehicle body. At the same time, the rotation interlocking shaft 28 that supports the operated lever 36 of the braking device 18 is made to protrude toward the lateral outer side of the aircraft body on the opposite side from the differential case 12, so that the steering operating tool 32 and the operated lever 36 are protruded from each other. The relay lever 34 that interlocks the lever 26 and the relay lever 37 that interlocks the brake pedal 31 and the operated lever 36 are connected to the double rotation interlocking shaft 2.
5, 28 and the transmission case 2
A steering clutch/brake operation structure for a transport vehicle, characterized in that the steering clutch/brake operation structure for a transport vehicle is attached to both left and right sides of a relay shaft 30 passing through the vehicle body in the left and right direction.