JPH02283536A - Horizontally-holding vehicle - Google Patents

Abstract

PURPOSE:To automate to hold in a horizontal condition on a sloping ground and the like by combining a truck swayable under a driver's seat and a loading bed, and controlling to hold the driver's seat and the loading bed horizontal depending on the inclination detecting signal of a pendulum switch, by the operation of a hydraulic cylinder. CONSTITUTION:A driver's seat A and a loading bed B are formed unitary through a flat board 10, and a truck C is installed swayable under them. A caterpillar U is wound to a driving wheel 1 and an idler wheel 2 at the front and the rear of the truck C, and an upper roller 3 at the upper part to enable to do the running. The upper roller 3 is installed to the upper end of an arm 6 which is movable around a pivot pin 5 fixed to the truck C as the center, and the lower end of the arm 6 is connected to the rod of a hydraulic cylinder Z1. Moreover, the flat board 10 is connected to the truck C by a hydraulic cylinder Z2. When the inclination of the flat board 10 is detected by a pendulum switch X, the upper roller 3 is moved by the cylinder 21 to hold the running posture stable, and at the same time, the flat board 10 is held horizontal constantly by the cylinder Z2.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a transportation vehicle used on sloped areas such as fields, orchards, golf courses, and forests, and is used for various transportation vehicles that require horizontal maintenance on uneven terrain. Applicable to vehicles.

[Conventional technology]

Conventionally, there has been no transport vehicle that has a specific structure that holds the cargo platform and driver's seat horizontally and maintains a stable running posture regardless of uneven terrain.

[Problem to be solved by the invention]

Transportation work on slopes requires a lot of consideration from the driver to drive safely on the slope itself, and the driver usually suffers a great deal of fatigue in order to drive safely and maintain the driving position from vertical vibrations of the driver's seat. give to the driver.

Furthermore, on slopes, agricultural products, materials, etc. loaded on loading platforms are used to moving and falling.

SUMMARY OF THE INVENTION An object of the present invention is to provide a horizontal holding vehicle that holds a cargo platform and a driver's seat horizontally on uneven ground, sloped ground, etc., and maintains a stable running posture at all times.

[Means to solve the problem]

(1) A loading platform and a driver's seat are installed on the same flat plate.
Support it in place and hold it with a hydraulic cylinder.

(2) The upper roller of the crawler track is moved in accordance with the expansion and contraction of the hydraulic cylinder to ensure stable running and posture.

(3) A control device consisting of a solenoid valve and a hydraulic control valve operated by a pendulum switch that detects the inclination of the loading platform and driver's seat is attached to the vehicle chassis.

[Effect]

(1) A pendulum switch detects the inclination of the loading platform or driver's seat,
A circuit of a solenoid valve and a hydraulic control valve operated by this pendulum switch controls expansion and contraction of the hydraulic cylinder.

(2) Hydraulic pressure is sent to the hydraulic cylinder through this control device, and the loading platform and driver's seat are held horizontally, and the upper roller of the crawler track is moved and held.

(3) This allows the topography (
This system simultaneously controls the leveling of the loading platform according to the slope (inclination) and the stable running posture of the tracks.

(4) Therefore, the driver in the driver's seat is freed from vertical and vertical vibrations caused by changes in terrain, and can concentrate solely on forward or reverse driving operations, and does not need to worry or be careful about the load moving or falling. , reducing driver fatigue.

(5) On the other hand, since the loading platform automatically travels while maintaining a substantially horizontal position at all times, it is possible to prevent the loaded items from moving or falling.

(6) By controlling the stable running posture of the track, the driver is less concerned about the stability of the vehicle while it is running, and it also gives a sense of security to those who see the vehicle running in the vicinity. can.

〔Example〕

In Figures 1 to 9, A is the driver's seat, Sn is the loading platform, and C
is the chassis, D is the track (both left and right), l is the starting wheel, 2 is the idler wheel, 3 is the upper roller, 4 is the shaft, 5, 7.9.12
is a pin, 6 is an arm, 8, 11, 13 is a bracket, IO is a flat plate, 14 is a steering lever, 15 is a brake pedal, 16 is a seat, X is a pendulum switch, Y' is a pendulum,
" is a pin, Y is a control device, Y' is a spool, Z is a hydraulic cylinder for moving the upper roller, 4 is a hydraulic cylinder for keeping the driver's seat and loading platform level, xd.

xu is electrical terminal, xd', XLI' is cushion, s
d, su move the spool solenoid, cd, c
u is a coil spring, P is a hydraulic pressure generator, T is an oil tank, S is a safety valve, Qt-j battery, p, u, d, t are oil inlets and outlets, t' is a bypass oil groove to the return boat t. .

As shown in FIGS. 1 to 3, the horizontal maintenance vehicle is composed of a driver's seat A, a cargo bed B, a chassis C including a prime mover/power transmission device, a hydraulic pressure generating device, etc., and a crawler track that is a traveling device.

Next, the crawler track rotates a starting wheel l attached to the rear (or front) of the chassis C via a prime mover and a power transmission device built into the chassis C. Meanwhile, in front of the chassis! An idler wheel 2 rotatably mounted on the is (or rear) and an upper roller 3 rotatably supported on the upper part of the chassis are arranged, and the crawler track is wound around these starting wheel 1, idler wheel 2, and upper roller 3. , it travels by being rotated by the driving of the starting wheel 1.

Next, the upper roller 3 is attached with an arm 6 that is movable around a pivot pin 5 attached to the chassis C.
It is assembled around a fixed shaft 4 on the upper end side.

On the other hand, the lower end side of the arm 6 is connected to the piston rod side of the hydraulic cylinder z1 by a fixed pin 7.

Furthermore, the driver's seat A and the cargo platform B are held horizontally with respect to the vehicle platform C by a pin 12 that pivotally supports the bracket 13 fixed to the lower side of the flat plate 10 of the cargo platform B and the bracket 11 fixed to the upper side of the chassis C. It forms the fulcrum of the mechanism.

On the other hand, the bracket 8 fixed to the lower side of the flat plate 10 of the loading platform B and the piston rod side of the hydraulic cylinder Z2 are connected by a pin 9, and the hydraulic cylinder is connected so that the driver's seat A and the loading platform B are in a horizontal state on a horizontal road surface. 4 expansion/contraction positions are set.

Note that a pendulum switch X for detecting the inclination of the driver's seat A and the cargo platform B is mounted on the lower surface of the flat plate 10 mentioned above.

Furthermore, the driver's seat A is equipped with a steering lever 14, a brake lever 15, a seat 16, etc. necessary for driving.
These are similar to the control devices of endless tracked vehicles.

5 and 6 show details of an example of the pendulum switch X.

First, this pendulum switch X is for detecting the inclination of the driver's seat A and the loading platform B, and is attached to the lower surface of the flat plate io of the loading platform B.

Next, r is a pendulum that is pivotally supported on the main body of the pendulum switch X by a pin r' so that the tightening strength can be adjusted.
u/ is installed. This cushion xd'.

d is for absorbing general vibrations while the transport vehicle is running, vibrations caused by minute irregularities on the road surface, and momentary vibrations, and truly detects only the slope of the slope.

7 to 9 show control values for controlling the hydraulic circuit in conjunction with the pendulum switch
This figure shows an example of a hydraulic system and an electrical system related to the cylinder z1 that holds the vehicle horizontally or the cylinder 4 that moves the upper row 23 that controls the traveling posture. Note that the center part of these figures shows the internal hydraulic circuit of the control device Y, the part above the center part shows the hydraulic system, and the part below the center part shows the electrical system from the pendulum switch X.

First, the central control device Y has four oil inlets and outlets, p is a boat that receives high-pressure hydraulic oil from an oil tank T via a hydraulic pressure generator P, and d is a hydraulic cylinder (zl or z2). U is the boat that goes in and out of the piston rod side, U is the boat that goes in and out of the cylinder head of the same hydraulic cylinder (2□ or z2), and t is the boat that returns to the hydraulic tank T.

Note that ze is a bypass oil groove to the return boat t, and Y′
is a spool that switches the hydraulic circuit, and is held in a neutral position by being squeezed from the left and right by coil springs cd and cu.

Furthermore, sd and su are solenoids that move the spool Y'. For example, when the pendulum X' of the pendulum switch When turned on, the spool τ overcomes the force of the spring CU and slides toward the solenoid au, switching the hydraulic circuit. Similarly, when the pendulum X' contacts the electric terminal xu side, the spool Y slides on the solenoid sd@Ic to switch the hydraulic circuit. In addition,
The driver's seat A and the loading platform B are horizontal, and the pendulum and pendulum X' are separated from the electric terminal , the spool Y' is returned to the neutral position and held.

With reference to FIGS. 3, 7, and 8, the holding action of the control device Y of the horizontal holding vehicle during climbing will be explained.

First, FIG. 3 shows a state in which the vehicle is tilted according to the shape of the slope, but the pendulum switch continues contact with solenoid s of control device Y.
d is activated, the spool Y' is moved in the direction of →d, pressure is delivered at b-+d, return 9 circuit is opened at u-+ t'→t, and the direction in which hydraulic cylinders z0 and 4 are contracted. By operating in the direction shown in FIG. .

Next, as shown in Fig. 3, while the driver's seat A and the cargo platform B continue to climb according to the inclination of the slope, the driver's seat A and the cargo platform B are maintained horizontally through the above-mentioned actions of the pendulum switch X and the control device Y. As shown in FIG. 7, the hydraulic circuit in this state is the same as when traveling on flat ground, and the hydraulic boats p, d, and u are all sealed.

The upper roller 3 in this running position also remains in the held state.

With reference to FIGS. 4 and 9, the holding action of the control device Y of the horizontal holding vehicle during dismounting will be explained.

First, Figure 4 shows a state in which the vehicle is tilted according to the shape of the slope, but the pendulum switch
' continues to be in contact with the electric terminal xu, the solenoid 8u of the control device Y is activated, and the spool τ is moved in the direction of the arrow U, the pressure feeding is performed at p − + u, and the return circuit is opened at d−+t. , by operating the hydraulic cylinders z1 and z2 in the direction of extension, the driver's seat A and the loading platform B are moved in the direction of arrow U.
By continuing to operate until the horizontal state is maintained in the direction of , and at the same time moving the upper roller 3 forward, the running posture is stabilized and maintained.

Next, as shown in Fig. 4, when the board continues to descend according to the inclination of the slope, the pendulum switch As shown in the figure, the driver's seat A and the cargo platform B can be maintained in a horizontal state automatically, so to speak, in accordance with the topography, both on a flat ground and on a slope. In addition, the running posture of the crawler belt can be maintained by moving the upper row 2.3 to the stable side depending on the terrain.

The hydraulic circuit is equipped with a safety device that prevents hydraulic pressure from leaking even when the prime mover is floating.

〔Effect of the invention〕

The horizontal maintenance vehicle according to the present invention includes a vehicle platform that is swingably coupled to the lower part of the driver's seat and the cargo platform, a hydraulic cylinder that is provided between the driver's seat and the platform and the vehicle platform, and a hydraulic cylinder that is attached to the driver's seat and the platform and that is inclined. It has the following effects by being composed of a forceps switch that detects the vibration, and a control device that operates a hydraulic cylinder based on the signal from the pendulum switch to hold the driver's seat and the cargo platform horizontally.

+1+ It is possible to automatically hold the driver's seat and the cargo platform approximately horizontally in a transport vehicle that climbs or descends on uneven ground or sloped ground.

(2) By keeping the vehicle running in a substantially horizontal position on uneven and sloping terrain, driver fatigue can be reduced and luggage can be prevented from tipping over and falling.

(3) The structure is simple and inexpensive.

[Brief explanation of drawings]

FIG. 1 is a side view showing an embodiment of the horizontal maintenance vehicle of the present invention, FIG. 2 is a plan view thereof, FIG. 3 is a side view of the vehicle during climbing, and FIG.
The figure shows a side view of the pendulum switch during unloading, FIG. 5 is a side view showing the details of the pendulum switch, FIG. 6 is a longitudinal sectional view thereof, and FIGS. 7 to 9 respectively show the control mechanism of the present invention. 3
FIG. 3 is a hydraulic/electrical system diagram showing two control states. A... Driver's seat B... Loading platform C... Vehicle platform D... Crawler track 3... Upper roller
5, 12... Pin X... Pendulum switch
Y...Control device z0,7J2...Hydraulic cylinder ￥1 Figure 2

Claims (2)

[Claims] (1) A vehicle platform that is swingably connected below the driver's seat and the loading platform, a hydraulic cylinder provided between the driver's seat, the loading platform, and the vehicle platform, and a pendulum switch that is attached to the driver's seat and the loading platform to detect inclination. and a control device that operates a hydraulic cylinder in response to a signal from a pendulum switch to maintain a driver's seat and a cargo platform horizontally. (2) A vehicle chassis that is swingably coupled to the lower part of the driver's seat and the cargo bed, an upper roller attached to the upper end of an arm pivotally connected to the chassis, a starting wheel and an idler wheel of the chassis, and the upper roller. a crawler belt wrapped around the vehicle; a hydraulic cylinder provided between the arm of the upper roller and the vehicle chassis; a hydraulic cylinder provided between the driver's seat, the cargo platform, and the vehicle platform;
A horizontal maintenance vehicle comprising: a pendulum switch attached to a driver's seat and a loading platform to detect inclination; and a control device that operates a hydraulic cylinder in response to a signal from the pendulum switch to maintain the driver's seat and loading platform horizontally.