CN104309709B - A kind of anti-rollover groove tank car - Google Patents

Abstract

The invention relates to an anti-rollover tank car. The car body and the tank are hinged, and the hinge axis is along the extending direction of the car body. A driving mechanism is arranged between the car body and the tank. Axis rotation. The tank rotates along the hinge axis, so that the state of the car body can be adjusted in real time to avoid rollover.

Description

A kind of anti-rollover tank car

technical field

The invention relates to an anti-rollover tank car.

Background technique

Large vehicles are prone to rollover accidents due to their large mass, high inertia, and high center of gravity. Existing anti-rollover measures mainly adopt the safety bag device to open the air bag between the car body and the road surface to prevent damage to the car body when a rollover occurs.

The above-mentioned anti-rollover scheme is an emergency measure when the car body has rolled over, and it is necessary to judge whether the car body rolls over by judging the inclination of the car body. Judgment criteria must be chosen carefully to avoid deploying the airbag when protection is not required, or failing to deploy the airbag in time when protection is required.

Tank trucks can also use elliptical cross-section tanks to reduce the risk of rollover by lowering the vehicle's center of gravity.

Existing schemes cannot really avoid the occurrence of rollover, and cannot be adjusted during driving.

Contents of the invention

The purpose of the present invention is to provide an anti-rollover system suitable for tank trucks to solve the problem in the prior art that it cannot be adjusted during driving to avoid rollover.

To achieve the above object, the solution of the present invention includes:

An anti-rollover tank truck, the car body and the tank are hinged, the hinge axis is along the extending direction of the car body, a driving mechanism is provided between the car body and the tank, and the driving mechanism is used to adjust the rotation of the tank along the hinge axis.

The car body is hinged with the tank through a bracket fixed on it.

The driving mechanism is at least one hydraulic cylinder arranged between the vehicle body and the tank.

There are four hydraulic cylinders, two of which are respectively arranged on both sides of the hinge axis.

The front end and the rear end of the tank are respectively connected to the vehicle body through hinges, and a hydraulic cylinder is arranged at the rear end.

The vehicle body is provided with a detection device for detecting the inclination of the vehicle body and/or the centrifugal force of the vehicle body. By detecting the inclination degree of the vehicle body and/or the centrifugal force of the vehicle body, the rotation amount of the tank driven by the driving mechanism is controlled.

The gravity pendulum is used to detect the tilt of the car body and the centrifugal force of the car body.

The tank rotates along the hinge axis, so that the state of the car body can be adjusted in real time to avoid rollover.

The beneficial effect of the invention is that the cost is low, the performance is stable and reliable, and the rollover of the tank truck can be effectively prevented.

The driving mechanism adopts hydraulic cylinders on both sides of the hinge axis, and the tank can swing by adjusting the expansion and contraction of the hydraulic cylinders. The control method is simple and reliable, with high safety.

A gravity pendulum is installed on the car body, which can not only indicate the degree of inclination, but also indicate the magnitude of the centrifugal force when turning. The gravity pendulum will deflect at a certain angle under the dual action of inertial force and gravity according to the traveling speed of the tanker and the side slope of the road. The hydraulic cylinder adjusts its expansion and contraction under the action of the control system according to the deflection angle of the gravity pendulum, so that the tank body rotates at a certain angle. At this time, the position of the center of gravity of the tanker moves to a position favorable to its balance, so that the entire body can still be in a balanced position, and the state of the tanker can be adjusted in real time to avoid rollover.

Description of drawings

Fig. 1 is the tank car front view of embodiment;

Fig. 2 is the rear view of the tank car of embodiment;

Fig. 3 is the hydraulic system schematic diagram of embodiment;

Fig. 4 is a schematic diagram of the deflection detection control part of the embodiment;

Fig. 5 is a schematic diagram of the embodiment on roads with different degrees of inclination;

Fig. 6 is a schematic diagram of the embodiment in different steering situations;

101. Servo control device, 102. Headstock, 103, 108. Hinge, 104. Turntable, 105. Frame chassis, 106. Wheel, 107. Single-acting plunger hydraulic cylinder, 109. Gravity pendulum, 110. Gravity pendulum indication Dial, 111. tank car body;

201. Single-acting plunger hydraulic cylinder, 202. Two-position three-way central function is "K" type electro-hydraulic servo valve, 203. One-way valve, 204. Relief valve, 205. Fuel tank, 206. One-way quantitative Hydraulic pump, 207. Back pressure valve;

301. internal meshing gear pair, 302. conductive post, 303. elastic conductive reed.

Detailed ways

The present invention will be described in further detail below in conjunction with the accompanying drawings.

Example 1

An anti-rollover tank car, as shown in Figure 1 and Figure 2, the front half of the tank body is connected to the chassis of the car body through a hinge 103, and the second half of the tank body is connected to the horizontal axis of the rear wheel row through a hinge and a hydraulic cylinder. Connection: There are two single-acting plunger hydraulic cylinders 107 on both sides of the tank body. The expansion and contraction of the hydraulic cylinders 107 can make the tank body swing to both sides to a certain extent, so as to achieve the purpose of balancing the vehicle body. Servo control device 101 is arranged at the forefront of the tank body, which can monitor its own state and control the hydraulic system in real time while the car body is moving, and adjust the balance of the car body.

The hydraulic system is shown in Figure 3. The one-way quantitative pump 206 pumps the hydraulic oil from the fuel tank and sends it to a pair of interlocked electro-hydraulic servo valves 202 through the oil pipeline; state, the hydraulic oil communicates with the plunger hydraulic cylinder 201 and the back pressure valve 207 through the oil delivery pipe at the same time, and finally returns to the oil tank. The oil circuits of the hydraulic cylinders on both sides of the tank are not connected, so that when the hydraulic cylinder is at rest, it can still have a certain pressure to maintain the balance of the tank. When one of the electro-hydraulic servo valves is powered on, the other is in a power-off state. The plunger hydraulic cylinder corresponding to the electrified side electro-hydraulic servo valve makes its plunger stretch out under the action of pressure oil, so that the tank body rotates to the other side, forcing the plunger hydraulic cylinder plunger on the other side to The hydraulic oil squeezed out by contraction in it returns to the oil tank through the oil delivery pipe through the back pressure valve 207 .

The principle of the body balance servo control device is shown in Figure 3. The control device part is mainly composed of a single-chip microcomputer and its basic circuit and a gravity pendulum. The gravity pendulum is connected to the elastic conductive reed through a pair of internal meshing gear pairs, so that the internal meshing gear Amplify the swing signal of the gravity pendulum to improve the sensitivity of the system response. The traveling speed of the vehicle body and the load in the tank are transmitted to the inside of the single-chip microcomputer through serial communication. When the road surface is inclined and the direction of travel of the car body changes, the gravity pendulum will force the grounded elastic conductive reed 303 to contact the conductive column 302 through a pair of internally meshed gear pairs under the action of gravity and centrifugal force, and the conductive column terminal 21' and 22' is connected with a pull-up circuit to be connected with the corresponding I/O port of the single-chip microcomputer, so that the level state of the I/O port changes and is detected by the single-chip microcomputer. When the road surface is smooth without inclination and the speed direction does not change, the elastic conductive reed 303 is not in contact with the conductive column, and the state of the I/O port of the single-chip microcomputer remains.

By programming the single-chip microcomputer, the power-on status of the electro-hydraulic servo valve is controlled in real time, and the expansion and contraction of the plunger-type hydraulic cylinder is adjusted, so as to achieve the purpose of adjusting the balance of the vehicle body. When tilting/turning in different directions, the elastic conductive reeds 303 respectively contact the conductive columns on different sides, so that the hydraulic cylinders on the corresponding sides are activated. The following details:

The balance principle of the tank truck running on an inclined road is shown in Figure 5. When the car body is driving on a straight road without inclination (middle), the gravity pendulum pointer is at the neutral position of the dial, and the elastic conductive reed will not touch To the contact point of the conductive column, the hydraulic cylinder maintains the original expansion and contraction, and the vehicle body runs in balance. When the road is inclined to the right, the gravity pendulum pointer is deflected to the left (left) of the dial, because the elastic conductive reed is in contact with the conductive column contact on the right. After the servo control device comprehensively processes the obtained signals, it controls the electro-hydraulic servo valve of the right hydraulic cylinder to be energized, so that the plunger of the right hydraulic cylinder is stretched out, and the tank moves to the left, thereby reaching a new balance point. When the road slopes to the left, the various components will cooperate to cause the tank to perform the opposite action as when the road slopes to the right.

The balance principle of the tank car when the speed direction changes on the non-inclined road is shown in Figure 6. When the car body is running straight (middle), the gravity pendulum pointer is in the middle of the dial, the hydraulic cylinder plunger does not move, and the car body is running in balance . When the car body turns left (left), the gravity pendulum swings to the right under the action of centrifugal force, and the elastic conductive reed 303 contacts the right conductive column contact 302 through the inner meshing gear pair at the same time. At this time, after the servo control device comprehensively processes the obtained signals, it energizes the electro-hydraulic servo valve in charge of the right hydraulic cylinder, so that the plunger of the right hydraulic cylinder is stretched out, and the tank moves to the left, so as to achieve a new balance point. When the car body turns right, each component will cooperate with each other to make the tank body take place and the opposite action when the car body turns left.

A specific embodiment has been given above, but the present invention is not limited to the described embodiment. Basic idea of the present invention is following scheme:

Anti-rollover tank truck, the car body and the tank are hinged, the hinge axis is along the extension direction of the car body, and a driving mechanism is provided between the car body and the tank, and the driving mechanism is used to adjust the rotation of the tank along the hinge axis. The tank rotates along the hinge axis, so that the state of the car body can be adjusted in real time to avoid rollover.

Based on the above basic scheme, various implementation modes can be formed:

●As in Embodiment 1, the expansion and contraction length of the left and right hydraulic cylinders is used to drive the tank to swing; as other implementations, other transmission forms can also be used, such as driving the tank to swing by driving the twisted shaft to rotate. If the front end or rear end of the tank is equipped with a deceleration mechanism, the deceleration mechanism drives the twisted shaft to rotate; the deceleration mechanism is driven by a motor.

●In addition to the hydraulic power form in Embodiment 1, gas power, electric power and other power forms can also be used.

●The bracket in Example 1 is used to connect the vehicle body and the tank, and realize the hinge connection between the vehicle body and the tank; as other implementation modes, it can also be replaced by other transfer structures. The triangular support in Embodiment 1 raises the tank to a certain height, which is beneficial to the left and right swing of the tank.

●The number of hydraulic cylinders can also be adjusted, such as the front and rear ends of the tank are equipped with hydraulic cylinders. The advantage of the embodiment is that only setting at the rear end can simplify the structure, save cost and facilitate control.

● In order to detect the degree of inclination, it is not limited to the gravity pendulum in Embodiment 1. The advantage of using a gravity pendulum is that the gravity pendulum can indicate not only the degree of inclination, but also the magnitude of the centrifugal force when turning. In order to realize the detection of the degree of inclination and the detection of the magnitude of the centrifugal force, different types of sensors can be used respectively.

● Regarding the control method, in Embodiment 1, the controller is triggered only when the gravity pendulum swings to a certain extent, and the controller has a certain delay in controlling the hydraulic mechanism. As other embodiments, a real-time control method may also be adopted, such as using an angle sensor or other sensors capable of detecting the inclination degree of the vehicle body, and controlling the rotation amount of the driving mechanism in real time according to the different inclination degrees.

For those of ordinary skill in the art, according to the teaching of the present invention, it does not need creative labor to design various deformation models, formulas, and parameters. Changes, modifications, substitutions and variations to the implementations without departing from the principle and spirit of the present invention still fall within the protection scope of the present invention.

Claims (4)

1. An anti-rollover tank truck, characterized in that the car body and the tank are hinged, the hinge axis is along the extending direction of the car body, and a driving mechanism is provided between the car body and the tank, and the driving mechanism is used to adjust the edge of the tank. The hinged axis rotates, and the driving mechanism is at least two hydraulic cylinders arranged between the car body and the tank; The tank is flexibly connected; the front half of the tank is connected to the chassis of the car body through a hinge, and the second half of the tank is connected to the horizontal shaft of the rear wheel row through a hinge and a hydraulic cylinder; the hydraulic system where each hydraulic cylinder is located also includes a one-way Quantitative pump, electro-hydraulic servo valve, one-way valve and back valve. The one-way quantitative pump pumps hydraulic oil from the fuel tank and transports it to a pair of interlocked electro-hydraulic servo valves through the oil pipeline. The two electro-hydraulic servo valves are respectively arranged On the oil circuit of the hydraulic cylinders on both sides of the hinged axis, when the electro-hydraulic servo valve is powered off, the hydraulic oil communicates with the hydraulic cylinder and the back pressure valve through the oil delivery pipe at the same time, and finally returns to the oil tank; One-way valve; when one of the electro-hydraulic servo valves is energized and the other is in a power-off state, the hydraulic cylinder corresponding to the energized electro-hydraulic servo valve will make its plunger stretch out under the action of pressure oil, so that the tank will move to the other side. The side rotation forces the hydraulic cylinder on the other side to shrink inward. The expansion and contraction of the hydraulic cylinder can make the tank swing to both sides, so that the center of gravity of the tank can move to a position that is conducive to its balance, so as to achieve a balanced body purpose; the car body is provided with a detection device for detecting the inclination of the car body and/or the centrifugal force of the car body, by detecting the degree of inclination of the car body and/or the size of the centrifugal force of the car body, the amount of rotation of the tank driven by the drive mechanism is controlled The front end of the tank body is provided with a servo control device, the servo control device includes a single-chip microcomputer and a detection device, the detection device is connected to the single-chip microcomputer, and the single-chip microcomputer controls the electro-hydraulic servo motor according to the degree of inclination of the car body and/or the centrifugal force of the car body detected by the detection device. In the energized state of the valve, adjust the expansion and contraction of the hydraulic cylinder plunger and adjust the balance of the car body. 2. The anti-rollover tank car according to claim 1, wherein the car body is hinged to the tank through a bracket fixed thereon. 3. The anti-rollover tank car according to claim 1, characterized in that four hydraulic cylinders are provided, two of which are respectively arranged on both sides of the hinge axis. 4. The anti-rollover tank car according to claim 1, characterized in that the gravity pendulum is used to detect the tilt of the car body and the centrifugal force of the car body.