CN104827956A - a mixer truck - Google Patents

Abstract

The invention provides a mixer truck. The mixer truck includes: an electronic control subsystem and a drive mechanism, wherein the electronic control subsystem is connected to the drive mechanism; the electronic control subsystem is used to collect vehicle speed signals, steering parameter signals and Steering return signal, and when the vehicle speed signal and steering parameter signal meet the set conditions, send the first control signal to the drive mechanism to instruct the tank body of the mixer truck to move in the steering direction of the mixer truck, and the tank body moves Afterwards, when the steering return signal of the mixer truck is collected, a second control signal for indicating the return of the tank body is sent to the drive mechanism; the drive mechanism is used to drive the tank body to the received first control signal Or move in the direction indicated by the second control signal. The invention solves the problem that the conventional mixer truck easily rolls over when turning.

Description

a mixer truck

technical field

The invention relates to the field of vehicles, in particular to a mixer truck.

Background technique

With the development of urbanization, the construction industry needs to transport a large amount of cement. Because the mixer truck has the advantages of large transportation capacity, fast and convenient, etc., it has been widely used.

Existing mixer trucks only have steering voice prompts when turning, and there are certain dangers:

During the turning process of the mixer truck, due to the high center of gravity and large mass of the mixer truck, it will be subject to a large centrifugal force during the steering process, especially when it is necessary to turn to avoid danger in an emergency, the turning radius of the mixer truck will be sharp at this time. The decrease causes the centrifugal force to increase sharply. In the above cases, it is very likely to cause a rollover accident, and may cause secondary injuries to small cars or passers-by.

Contents of the invention

The invention provides a mixer truck, which is used to solve the problem that the existing mixer truck is easy to rollover when turning.

The present invention provides a mixer truck, including: an electronic control subsystem and a drive mechanism, wherein:

The electronic control subsystem is connected to the driving mechanism;

The electronic control subsystem is used to collect the vehicle speed signal, steering parameter signal and steering return signal of the mixer truck, and when the vehicle speed signal and steering parameter signal meet the set conditions, send a signal to the driving mechanism. The first control signal used to instruct the tank body of the mixer truck to move in the steering direction of the mixer truck, and after the tank body moves, when the steering return signal of the mixer truck is collected, send to the The drive mechanism sends out a second control signal for instructing the return of the tank body;

The driving mechanism is used to drive the tank body to move in the direction indicated by the received first control signal or the second control signal.

The beneficial effects of the present invention include:

The mixer truck provided by the present invention includes an electronic control subsystem and a drive mechanism, wherein, when the collected vehicle speed signal and the steering parameter signal meet the set conditions, the electronic control subsystem sends a signal to the drive mechanism to indicate the tank body of the mixer truck. The first control signal to move in the steering direction of the mixer truck, and when the steering return signal of the mixer truck is collected, send the second control signal to the drive mechanism to instruct the tank body of the mixer truck to move in the direction opposite to the steering direction of the mixer truck ; The drive mechanism drives the tank body to move in the corresponding direction according to the first control signal or the second control signal. The mixer truck can send out the first control signal when the vehicle speed and steering parameter signals reach the set conditions to control the tank body to move in the steering direction of the mixer truck, that is, when the mixer truck turns to the left, the tank body is controlled to move to the left. When the car turns right, control the tank body to move to the right, so that the center of gravity of the tank body also moves accordingly, so that the gravity of the tank body forms a stable moment relative to the center of the vehicle, and balances the centrifugal force generated by the steering. The overturning moment solves the problem that the existing mixer truck is easy to roll over when turning, and the degree of automation is high without manual operation, which can better avoid secondary injuries to small cars and pedestrians, and has high safety and reliability. have a broad vision of application.

Description of drawings

Fig. 1 is the overall structure schematic diagram of the mixer truck that the embodiment of the present invention provides;

Fig. 2 is a schematic diagram of the structure in the direction of A and B in the structural diagram of the mixer truck shown in Fig. 1;

Figure 3 is a diagram of the direction of the oil circuit when the left position of the electro-hydraulic reversing valve is connected;

Figure 4 is a diagram of the oil circuit when the electro-hydraulic reversing valve is connected to the right position.

Detailed ways

The specific implementation manners of the mixer truck provided by the embodiments of the present invention will be described below in conjunction with the drawings in the description.

An embodiment of the present invention provides a mixer truck, specifically including: an electronic control subsystem and a drive mechanism, wherein:

The electronic control subsystem is connected with the driving mechanism;

The electronic control subsystem is used to collect the vehicle speed signal, the steering parameter signal and the steering return signal of the mixer truck, and when the vehicle speed signal and the steering parameter signal meet the set conditions, send the tank direction of the mixer truck to the drive mechanism. The first control signal for the movement of the mixer truck in the steering direction, and after the tank body moves, when the steering return signal of the mixer truck is collected, send a second control signal for indicating the return of the tank body to the drive mechanism;

The driving mechanism is used to drive the tank body to move in the direction indicated by the received first control signal or the second control signal.

It should be noted that, in the embodiment of the present invention, the definitions of left and right orientations are the same as the definitions of left and right in the actual use state of the vehicle.

Preferably, in the embodiment of the invention, the drive mechanism can drive the tank body to move in the direction indicated by the first control signal or the second control signal through hydraulic control. Small size, light weight, convenient design, long service life and other advantages.

The mixer truck provided by the embodiment of the present invention has improved the circuit and oil circuit control part of the existing mixer truck, and the electronic control subsystem can send a corresponding signal to the drive mechanism when the vehicle speed signal and the steering parameter signal meet the set conditions. The first control signal of the mixer truck controls the tank body of the mixer truck to move in the direction of the steering of the mixer truck. Then, when the electronic control subsystem collects the steering return signal again, it sends a corresponding second control signal to the drive mechanism to control the mixer truck. Return the tank body of the truck, that is, when the mixer truck turns left and the vehicle speed signal and steering parameter signal meet the set conditions, control the tank body to move to the left; when the mixer truck turns right and the vehicle speed signal and steering parameter signal meet the set conditions When the conditions are set, the tank is controlled to move to the right, so that the center of gravity of the tank moves accordingly, so that the gravity of the tank forms a stable moment relative to the center of the vehicle, and balances the centrifugal force generated during steering. The overturning moment better solves the problem that the existing mixer truck is easy to roll over when turning.

Further, as shown in Figures 1 and 2, the electronic control subsystem may include: a rotation angle sensor 1, a vehicle speed sensor (not shown in the figure) and a controller 2, and the controller 2 is connected to the vehicle speed sensor and the rotation angle sensor 1 respectively; wherein :

The vehicle speed sensor is used to collect the vehicle speed signal of the mixer truck;

The angle sensor 1 is used to collect the steering parameter signal of the mixer truck turning left or right;

The controller 2 is used to compare the steering parameter signal with the preset steering parameter threshold when the vehicle speed of the mixer truck is greater than the set threshold value, and send an instruction to the driving mechanism when the steering parameter signal is greater than the set threshold value. The first control signal for the tank body of the mixer truck to move in the steering direction of the mixer truck.

In the embodiment of the present invention, the controller can use the signals collected by the existing components of the vehicle, such as the rotation angle sensor and the vehicle speed sensor, to make logical judgments, and the accuracy is better.

In the embodiment of the present invention, the steering parameter signal may include an angular velocity signal and/or a steering angle signal. In a specific implementation, when the vehicle speed is greater than a set vehicle speed threshold (for example, 60km/h), the angular velocity signal may be considered at the same time. and whether the values of the steering angle signal and the steering angle signal are greater than the corresponding threshold, or whether only one of the angular velocity signal and the steering angle signal is greater than the corresponding threshold can be considered to trigger the subsequent steps of controlling the movement of the tank body. For example, when the vehicle speed meets the set condition, when the angular velocity is greater than the angular velocity threshold of 36/2πrad/s, it is determined that a corresponding first control signal needs to be sent to the drive mechanism, or when the steering angle is greater than the steering angle threshold of 90 degrees (ie π/2), When it is determined that a corresponding first control signal needs to be sent to the driving mechanism, or both meet the angular velocity threshold value that the angular velocity is greater than 36/2πrad/s, and the steering angle is greater than the steering angle threshold value of π/2, it is determined that a corresponding first control signal needs to be sent to the driving mechanism. the first control signal.

The vehicle speed threshold, the angular velocity threshold and the steering angle threshold can all be determined with reference to the range of steering parameters where there is a risk of rollover of the mixer truck, and the above are just examples.

Preferably, the above-mentioned controller 2 can be arranged in an electric control box.

Further, as shown in Figures 1 and 2, the drive mechanism includes: an oil tank 3, a hydraulic pump 4, an engine 5 connected to the hydraulic pump 4, an electro-hydraulic reversing valve 6, a front hydraulic cylinder component 7 and a rear hydraulic cylinder component 8 ;in:

The electro-hydraulic reversing valve 6 includes two input terminals and two output terminals, which are referred to as the first input terminal, the first output terminal, the second input terminal and the second output terminal for convenience below;

The oil tank 3 is respectively connected to the second output end of the electro-hydraulic directional valve 6 and the input end of the hydraulic pump; the output end of the hydraulic pump 4 is connected to the first input end of the electro-hydraulic directional valve 6;

The hydraulic oil enters the electro-hydraulic directional valve 6 sequentially through the first input end, then outputs through the first output end, and then returns to the electro-hydraulic directional valve 6 through the second input end, and finally passes through the first electro-hydraulic directional valve 6 The second output end returns to the oil tank 3, finally forming a closed oil circuit.

The electro-hydraulic reversing valve 6 can adopt the electro-hydraulic reversing valve in the prior art, and the electro-hydraulic reversing valve 6 can make the two oil circuits interchangeable according to the needs of the oil circuit.

When the left position of the electro-hydraulic reversing valve 6 is connected, specifically, as shown in Figure 3, among the two ports on the upper end of the electro-hydraulic reversing valve 6, the left one is the first output end, and the right one is the second input end , among the two ports at the lower end of the electro-hydraulic reversing valve 6, the left one is the first input end, and the right one is the second output end. After reversing, that is, when the right position of the electro-hydraulic reversing valve is connected, as shown in Figure 4, the flow direction of the oil circuit of the two ports at the lower end of the electro-hydraulic reversing valve 6 remains unchanged, that is, the two ports at the lower end of the electro-hydraulic reversing valve 6 Among the two ports, the one on the left is the first input end, and the one on the right is the second output end. Among the two ports on the upper end of the electro-hydraulic reversing valve 6, the one on the right is the first output end, and the one on the left is the second input end.

The hydraulic pump 4 is used to pressurize the hydraulic oil in the oil tank 3 and then input it into the electro-hydraulic reversing valve 6. This process is realized with the cooperation of the engine 5. The engine 5 is connected to the hydraulic pump 4, so it can drive the hydraulic pump 4 to operate, thereby sucking out and pressurizing the hydraulic oil in the oil tank 3;

A closed hydraulic oil circuit is formed among the first output end of the electro-hydraulic reversing valve 6 , the front hydraulic cylinder member 7 , the rear end hydraulic cylinder member 8 and the second input end of the electro-hydraulic reversing valve 6 . The electro-hydraulic reversing valve 6 is used to send the active hydraulic cylinders in the front hydraulic cylinder component 7 and the rear hydraulic cylinder component 8 respectively through the hydraulic oil circuit according to the first control signal or the second control signal sent by the electronic control subsystem. The pressurized hydraulic oil is input into the rod chamber or the rodless chamber (the other chamber is unpressurized hydraulic oil), and the oil pressure difference between the rod chamber and the rodless chamber of each hydraulic cylinder is controlled to make the front hydraulic cylinder The piston rods of the hydraulic cylinders in the component 7 and the rear hydraulic cylinder component 8 move in the direction indicated by the first control signal under the action of the pressure difference.

Specifically, when the mixer truck turns to the left, the controller 2 sends out the first control signal indicating that the tank body moves to the left, and connects the left position of the electro-hydraulic reversing valve 6 to the oil circuit, as shown in Figure 3, the electric The first output end of the hydraulic reversing valve 6 (that is, the left port of the two ports at the upper end of the electro-hydraulic reversing valve) flows out of pressurized hydraulic oil, that is, high-pressure hydraulic oil, which enters through the pipeline respectively. In the rod chamber or rodless chamber of each hydraulic cylinder of the front end hydraulic cylinder member 7 and the rear end hydraulic cylinder member 8 (the specific chamber needs to be determined according to the direction of movement of the piston rod of the hydraulic cylinder, and the direction of movement of the piston rod is determined by the stirring The direction of movement of the tank body of the vehicle is determined), the other of the two cavities of each hydraulic cylinder is low-pressure hydraulic oil, so the hydraulic oil in the two cavities of each hydraulic cylinder produces a pressure difference, and the front hydraulic cylinder components 7 and the piston rods of the hydraulic cylinders in the rear-end hydraulic cylinder member 8 move to the direction indicated by the first control signal under the action of the pressure difference, and at the same time, the two hydraulic cylinders of the front-end hydraulic cylinder member 7 and the rear-end hydraulic cylinder member 8 The low-pressure hydraulic oil in the other chamber of the two chambers flows back to the oil tank 3 through the oil return line through the electro-hydraulic reversing valve 6 .

When the mixer truck turns to the right, the controller 2 sends a first control signal to connect the right position of the electro-hydraulic reversing valve 6 to the oil circuit, and the hydraulic oil in the electro-hydraulic reversing valve 6 changes the flow direction, as shown in Figure 4, At this time, the first output end of the electro-hydraulic reversing valve 6 (that is, the right port of the two ports at the upper end of the electro-hydraulic reversing valve) flows out of pressurized hydraulic oil, that is, high-pressure hydraulic oil, and the high-pressure hydraulic oil passes through the pipeline. Enter the rod cavity or rodless cavity of each hydraulic cylinder of the front hydraulic cylinder member 7 and the rear hydraulic cylinder member 8 respectively, and the other of the two chambers of each hydraulic cylinder is low-pressure hydraulic oil, so each hydraulic cylinder The hydraulic oil in the two chambers of the rod chamber and the rodless chamber produces a pressure difference, and the piston rods of the hydraulic cylinders in the front hydraulic cylinder member 7 and the rear hydraulic cylinder member 8 send the first control signal to the first control signal under the action of the pressure difference. Move in the indicated direction, and at the same time, the low-pressure hydraulic oil in the other chamber of the two hydraulic cylinders of the front hydraulic cylinder member 7 and the rear hydraulic cylinder member 8 flows back to the oil tank through the oil return line through the electro-hydraulic reversing valve 6 3.

The aforementioned definitions of high-pressure hydraulic oil and low-pressure hydraulic oil only indicate that there is a pressure difference between the hydraulic oil in the two cavities, and the embodiment of the present invention does not specifically limit the specific pressure values of the high-pressure hydraulic oil and the low-pressure hydraulic oil.

Further, the front end hydraulic cylinder component 7 may include at least two hydraulic cylinders, the ends of the piston rods of the at least two hydraulic cylinders are connected together, and the at least two hydraulic cylinders are arranged symmetrically with respect to the vertical line;

Likewise, the rear end hydraulic cylinder component 8 may comprise at least two hydraulic cylinders, the ends of the piston rods of the at least two hydraulic cylinders are connected together, and the at least two hydraulic cylinders are arranged symmetrically with respect to the vertical line;

Figure 2 is a schematic diagram of the relevant structure in the direction A in Figure 1 (the left and right in the structural schematic diagram of this direction are opposite to the left and right defined in the actual use state of the vehicle) and the schematic diagram of the relevant structure in the B direction (the structural diagram of this direction For the convenience of explanation, the directions in the figure are redefined in Fig. 2 with reference to the left and right in the actual use state of the vehicle.

As shown in Figure 2, when the electro-hydraulic reversing valve 6 receives the first control signal or the second control signal indicating that the tank body of the mixer truck moves to the left, the electro-hydraulic reversing valve 6 is connected to the left, and the electro-hydraulic reversing valve The first output end of the valve 6 is respectively connected to the rodless cavity of the hydraulic cylinder (such as the hydraulic cylinder 71 in Fig. 2 ) located on the right side of the vertical line in the front end hydraulic cylinder component 7, and is located on the left side of the vertical line in the front end hydraulic cylinder component 7. The rod cavity of the hydraulic cylinder (for example, hydraulic cylinder 72 in FIG. 2 ), the rod cavity of the hydraulic cylinder (such as hydraulic cylinder 81 in FIG. 2 ) in the rear end hydraulic cylinder member 8 and the rear end The rodless cavity of the hydraulic cylinder (such as the hydraulic cylinder 82 in Fig. 2 ) located on the right side of the vertical line in the hydraulic cylinder component 8 is connected; The rod cavity of the hydraulic cylinder on the right side of the line (such as hydraulic cylinder 71 in FIG. 2 ), the rodless cavity of the hydraulic cylinder on the left side of the vertical line in the front end hydraulic cylinder member 7 (such as hydraulic cylinder 72 in FIG. 2 ), The rodless cavity of the hydraulic cylinder (for example, hydraulic cylinder 81 in FIG. The hydraulic cylinder 82) is connected with a rod cavity;

When the electro-hydraulic reversing valve 6 receives the first control signal or the second control signal indicating that the tank body of the mixer truck moves to the right, the right position of the electro-hydraulic reversing valve is connected, and the first output of the electro-hydraulic reversing valve 6 The ends are respectively connected with the rod cavity of the hydraulic cylinder (such as hydraulic cylinder 71 in Fig. 2 ) on the right side of the vertical line in the front end hydraulic cylinder component 7, and the hydraulic cylinder (such as the hydraulic cylinder 71 in Fig. 2 ) on the left side of the vertical line in the front end hydraulic cylinder component 7 The rodless cavity of the hydraulic cylinder 72 in the middle, the rodless cavity of the hydraulic cylinder (such as the hydraulic cylinder 81 in FIG. The rod cavity of the hydraulic cylinder on the right side of the line (such as the hydraulic cylinder 82 in Fig. 2) is connected; the second input end of the electro-hydraulic reversing valve 6 is respectively connected with the hydraulic cylinder ( For example, the rodless cavity of the hydraulic cylinder 71 in FIG. 2 , the rod cavity of the hydraulic cylinder (such as the hydraulic cylinder 72 in FIG. The rod cavity of the hydraulic cylinder on the left side of the vertical line (such as hydraulic cylinder 81 in FIG. Rod cavity connection.

In the embodiment of the present invention, a standardized hydraulic component, that is, an electro-hydraulic reversing valve, is used to control the direction of high and low hydraulic oil in the front hydraulic cylinder component and the rear hydraulic cylinder component, thereby further controlling the front hydraulic cylinder component and the rear hydraulic cylinder component The direction of movement of the hydraulic rod, thereby driving the overall movement of the tank of the mixer truck, is simple and convenient.

Further, the mixer truck also includes: a front guide rail 9, a rear guide rail 10, a front support 11 cooperating with the front guide rail 9, and a rear support 12 cooperating with the rear guide rail 10;

The front guide rail 9 and the rear guide rail 10 are installed on the frame of the mixer truck;

The front support 11 and the rear support 12 are used to rotatably support the two ends of the tank of the mixer truck;

The connection points of the piston rods of at least two hydraulic cylinders in the front end hydraulic cylinder member 7 are connected with the front support 11; the connection points of the piston rods of at least two hydraulic cylinders in the rear end hydraulic cylinder member 8 are connected with the rear support 12 .

Preferably, the connection point of the above-mentioned piston rod and the front support 11 or the rear support 12 may be hinged or connected in other ways.

Preferably, the front and rear guide rails can cooperate with the front and rear supports in the form of sliding grooves. As shown in Figure 1, the bottoms of the front support 11 and the rear support 12 can be designed as dovetails. Correspondingly, the front guide rail 9 and the rear guide rail The parts that cooperate with the front support 11 and the rear support 12 respectively on the 10 are designed as dovetail-shaped grooves. Through such a matching method, it is ensured that the front support 11 and the rear support 12 can only move in the left and right directions of the front guide rail 9 and the rear guide rail 10 respectively, but cannot move in other directions. When installing, the front support 11 and the rear support 12 are inserted into the slide grooves from the ends of the front guide rail 9 and the rear guide rail 10 respectively.

Of course, the above-mentioned front and rear supports and the front and rear guide rails can also cooperate in other ways, and any structure that can realize the movement of the supports along the direction defined by the guide rails is acceptable.

Further, the hydraulic cylinder barrel in the front hydraulic cylinder member 7 can be located on the front guide rail 9 , similarly, the hydraulic cylinder barrel in the rear hydraulic cylinder member 8 can also be located on the rear guide rail 10 .

Preferably, the hydraulic cylinder cylinder and the guide rail can be connected in a hinged or other movable manner (so that the hydraulic cylinder cylinder can also adapt to the movement of the piston rod while being connected to the guide rail). This is not limited, and the bottom support of the cylinder barrel of the hydraulic cylinder can be hinged to the guide rail as shown in FIG. 2 during specific connection.

Further, as shown in FIG. 2 , the two ends of the front guide rail 9 and/or the rear guide rail 10 are respectively provided with limit blocks 13, and the limit blocks 13 are used to limit the movement of the front support 11 on the front guide rail 9 and the rear support 12. In the range of movement on the rear guide rail 10, when the front support 11 and the rear support 12 touch the limit block 13, they stop moving left or right. Therefore, the installation position of the limit block 13 needs to be determined with reference to the right overturning moment or the left overturning moment generated when the tank body of the mixer truck overcomes the left or right turn.

Preferably, the limit block 13 can be fixed on the front guide rail 9 and the rear guide rail 10 by welding or bolting.

The specific working process of the mixer truck provided by the embodiment of the present invention will be described below with the situation that the front hydraulic cylinder member 7 and the rear hydraulic cylinder member 8 each include two hydraulic cylinders:

As shown in Figure 2, the front end hydraulic cylinder component 7 includes: a first hydraulic cylinder 71 and a second hydraulic cylinder 72, the piston rod ends of the first hydraulic cylinder 71 and the second hydraulic cylinder 72 are connected together, and the first hydraulic cylinder 71 and the second hydraulic cylinder 72 are arranged symmetrically with respect to the vertical line, and the connecting point of the piston rod end of the first hydraulic cylinder 71 and the second hydraulic cylinder 72 is connected with the front support 11. Preferably, the connection method here can be Use hinged or other connection methods. The cylinder bottom bearings of the first hydraulic cylinder 71 and the second hydraulic cylinder 72 are respectively located on both sides of the front guide rail 9;

The rear end hydraulic cylinder component 8 includes: a third hydraulic cylinder 81 and a fourth hydraulic cylinder 82, the piston rod ends of the third hydraulic cylinder 81 and the fourth hydraulic cylinder 82 are connected together, and the first hydraulic cylinder 71 and the second hydraulic cylinder The cylinders 72 are arranged symmetrically with respect to the vertical line, and the connection points of the piston rod ends of the first hydraulic cylinder 71 and the second hydraulic cylinder 72 are connected with the rear support 12. Preferably, the connection method here can also be hinged or other connection method. The cylinder bottom bearings of the third hydraulic cylinder 81 and the fourth hydraulic cylinder 82 are respectively located on both sides of the rear guide rail 10;

The cylinder barrel of each of the hydraulic cylinders above is divided into two chambers by the piston, namely the rod chamber and the rodless chamber. As shown in Figure 2, the rod chamber can also be called the upper chamber, and the rodless chamber can also be called the upper chamber. It can be called the lower chamber, and the definition of upper and lower in the above upper chamber and lower chamber can be determined by referring to the relationship between the upper and lower positions of the mixer truck under normal use conditions.

When the mixer truck turns to the left, the angle sensor 1 will collect the vehicle speed signal and the left steering parameter signal of the mixer truck. When the speed of the mixer truck is greater than the set speed threshold, the left steering parameter signal will be compared with the preset threshold. When the parameter signal is greater than the corresponding threshold, the controller 2 will control the left position of the electro-hydraulic reversing valve 6 to connect to the oil circuit, and then the high-pressure hydraulic oil flows from the electro-hydraulic reversing valve 6 into the rodless chamber of the first hydraulic cylinder 71 respectively. , the rodless cavity of the fourth hydraulic cylinder 82, the rod cavity of the second hydraulic cylinder 72 and the rod cavity of the third hydraulic cylinder 81;

With the inflow of high-pressure oil, the volume of the rodless chamber of the first hydraulic cylinder 71, the rodless chamber of the fourth hydraulic cylinder 82, the rod chamber of the second hydraulic cylinder 72 and the rod chamber of the third hydraulic cylinder 81 will gradually increase. increase, the pistons in each hydraulic cylinder will have a certain displacement under the promotion of hydraulic oil, and at the same time, the volume of the chamber containing low-pressure oil in each hydraulic cylinder will gradually decrease, so the first hydraulic cylinder 71 has The low-pressure hydraulic oil in the rod chamber, the rod chamber of the fourth hydraulic cylinder 82, the rodless chamber of the second hydraulic cylinder 72 and the rodless chamber of the third hydraulic cylinder 81 will flow back through the oil return pipe through the electro-hydraulic reversing valve 6 fuel tank3.

In order to explain the moving principle of the tank body in more detail, the force condition of the front support 11 is described below as an example: since the rodless cavity of the first hydraulic cylinder 71 is high-pressure hydraulic oil, and the rod cavity is low-pressure hydraulic oil, so The hydraulic pressure will push the piston in the first hydraulic cylinder 71 to move away from the bottom of the cylinder, and the movement of the piston will drive the piston rod connected to it to move away from the bottom of the cylinder. The support 11 produces an active force, the vertical component of the active force will be balanced by other forces, and the horizontal component along the direction of the guide rail will not be affected, so the piston rod of the first hydraulic cylinder 71 will press against the front support. 11 generates a horizontal thrust to the left, pushing the front support 11 to move to the left;

Similarly, since the rodless cavity of the second hydraulic cylinder 72 is low-pressure hydraulic oil, and the rod cavity is high-pressure hydraulic oil, the hydraulic action will push the piston in the second hydraulic cylinder 72 to move toward the direction close to the bottom of the cylinder, and the movement of the piston It also drives the piston rod connected to it to move towards the bottom of the cylinder, and the piston rod will generate a force on the front support 11 fixed thereto, and the vertical component of the force will be balanced by other forces. The horizontal component force along the direction of the guide rail will not be affected, so the piston rod of the second hydraulic cylinder 72 will generate a horizontal pulling force to the left on the front support 11, pulling the front support 11 to move to the left;

Under the combined action of the leftward horizontal thrust of the first hydraulic cylinder 71 piston rod and the leftward horizontal pull of the second hydraulic cylinder 72 piston rod, the front support 11 will move leftward in the front guide rail 9 .

Similarly, the specific stress situation of the rear support 12 can refer to the stress situation of the above-mentioned front support 11, the piston rod of the fourth hydraulic cylinder 82 will generate a leftward horizontal thrust to the rear support 12, while the third hydraulic pressure The piston rod of the cylinder 81 will generate a horizontal pulling force to the left on the rear support 12 , and under the joint action of these two forces, the rear support 12 will move leftward in the rear guide rail 10 . The front support 11 and the rear support 12 jointly move to the left to drive the tank body supported by both to move to the left.

When the front support 11 and the rear support 12 move to the limit block 13, the limit block 13 blocks the front support 11 and the rear support 12, and the tank body of the mixer truck moves to the left, and the front support 11 And rear support 12 stops moving to the left.

When the mixer truck turns to the right, the angle sensor 1 will collect the right steering parameter signal of the mixer truck, and compare the parameter signal with the preset threshold value. When the parameter signal is greater than the threshold value, the controller 2 will control the electro-hydraulic The oil circuit reversing occurs to the valve 6 and the right position is connected to the oil circuit. At this time, the high-pressure hydraulic oil flows from the electro-hydraulic reversing valve 6 into the rod chamber of the first hydraulic cylinder 71, the rod chamber of the fourth hydraulic cylinder 82, and the rod chamber of the fourth hydraulic cylinder 82. The rodless chamber of the second hydraulic cylinder 72 and the rodless chamber of the third hydraulic cylinder 81;

With the inflow of high-pressure oil, the volume of the rod chamber of the first hydraulic cylinder 71, the rod chamber of the fourth hydraulic cylinder 82, the rodless chamber of the second hydraulic cylinder 72 and the rodless chamber of the third hydraulic cylinder 81 will gradually increase. increase, the piston in each hydraulic cylinder will produce a certain displacement under the action of hydraulic oil, and at the same time, the volume of the cavity containing low-pressure oil in each hydraulic cylinder will gradually decrease, so the first hydraulic cylinder 71 has no pressure. The low-pressure hydraulic oil in the rod chamber, the rodless chamber of the fourth hydraulic cylinder 82, the rod chamber of the second hydraulic cylinder 72 and the rod chamber of the third hydraulic cylinder 81 will flow back through the oil return pipe through the electro-hydraulic reversing valve 6 fuel tank3.

Next, let’s take the stress situation of the previous support 11 as an example to illustrate: since the rodless chamber of the first hydraulic cylinder 71 is low-pressure hydraulic oil, and the rod chamber is high-pressure hydraulic oil, the hydraulic pressure will push the hydraulic pressure in the first hydraulic cylinder 71. The piston moves toward the bottom of the cylinder, and the movement of the piston drives the piston rod connected to it to move toward the bottom of the cylinder. The piston rod will exert a force on the front support 11 fixed thereto. The vertical component force of the force will be balanced by other forces, and the horizontal component force along the direction of the guide rail will not be affected, so the piston rod of the first hydraulic cylinder 71 will produce a rightward horizontal pulling force on the front support 11, pulling Move the front support 11 to the right;

Similarly, since the rodless chamber of the second hydraulic cylinder 72 is high-pressure hydraulic oil, and the rod chamber is low-pressure hydraulic oil, the hydraulic pressure will push the piston in the second hydraulic cylinder 72 to move away from the bottom of the cylinder, and the movement of the piston It also drives the piston rod connected to it to move away from the bottom of the cylinder, and the piston rod will generate a force on the front support 11 fixed to it, and the vertical component of the force will be balanced by other forces. The horizontal component force along the direction of the guide rail will not be affected, so the piston rod of the second hydraulic cylinder 72 will generate a rightward horizontal thrust to the front support 11, pushing the front support 11 to move to the right;

Under the combined action of the rightward horizontal pulling force of the first hydraulic cylinder 71 piston rod and the rightward horizontal thrust of the second hydraulic cylinder 72 piston rod, the front support 11 will move rightward in the front guide rail 9 .

In the same way, the specific stress situation of the rear support 12 can refer to the stress situation of the above-mentioned front support 11. The piston rod of the third hydraulic cylinder 82 will produce a rightward horizontal thrust to the rear support 12, while the fourth The piston rod of the hydraulic cylinder 71 will generate a rightward horizontal pulling force on the rear support 12 , and under the joint action of these two forces, the rear support 12 will move to the right in the rear guide rail 10 . The front support 11 and the rear support 12 move to the right together to drive the tank body supported by both to move to the right.

When the front support 11 and the rear support 12 move to the limit block 13, the limit block 13 blocks the front support 11 and the rear support 12, and the tank body of the mixer truck moves to the right, and the front support 11 And rear support 12 stops moving to the right.

When the electronic control subsystem collects the return signal of the mixer truck, it sends a second control signal to the drive mechanism to instruct the tank body of the mixer truck to move in the direction opposite to the previous steering direction of the mixer truck so as to control the tank body to return in time.

Further, when the mixer truck turns left and returns to the right direction, the drive mechanism will drive the tank body of the mixer truck to move to the right and return to the initial position before turning according to the working principle when the mixer truck turns right;

When the mixer truck turns right and returns to the right direction, the driving mechanism will drive the tank body of the mixer truck to move left and return to the initial position before turning according to the working principle when the mixer truck turns left.

Specifically, as shown in Figure 2, when the mixer truck turns to the left and returns to the center, after the electronic control subsystem collects the signal of returning to the center of the mixer truck, it sends a second control to the drive mechanism to instruct the mixer truck to move to the right signal to control the right position of the electro-hydraulic reversing valve 6 to connect to the oil circuit. At this time, the situation of high-pressure oil and low-pressure oil in the two chambers of each hydraulic cylinder is exactly opposite to that of the previous steering, that is, the chamber where the high- and low-pressure oil is located at this time body is the same as the position of the high and low pressure oil when the mixer truck turns to the right and the steering parameter signal is greater than the threshold value, and the force conditions of the front support 11 and the rear support 12 are also correspondingly the same, so the front support 11 and the rear support 12 are the same. The rear support 12 will move to the right together to drive the tank body supported by both to the right to return to the position before the steering, so that the center of gravity of the tank body of the mixer truck that has been shifted before moves to the right to return to the position before the steering;

In the same way, when the mixer truck turns to the right and returns to the right direction, the electronic control subsystem will send a second control signal to the drive mechanism to instruct the mixer truck to move to the left after the electronic control subsystem collects the signal of the mixer truck to move to the left, and control the electro-hydraulic The left position of the reversing valve 6 is connected to the oil circuit. At this time, the positions of the high-pressure oil and the low-pressure oil in the two cavities of each hydraulic cylinder are exchanged, that is, the position of the high-pressure oil and the mixer truck turn left and the steering parameter signal is greater than In the case of the threshold value, the position of the high and low pressure oil is the same, and the stress of the front support 11 and the rear support 12 is also correspondingly the same, so the front support 11 and the rear support 12 will move to the left together to drive the two joints together. The supported tank body moves to the left and returns to its original position, so that the center of gravity of the tank body of the mixer truck that has been shifted moves to the left to return to the original center position.

Further, as shown in Figures 1 and 2, the electronic control subsystem may also include: a pressure relay 14, the pressure relay 14 is connected to the controller 2 and the output pipeline of the electro-hydraulic directional valve 6 for monitoring the Whether the oil pressure output to the valve 6 is greater than the set threshold value, if so, feed back a signal to the controller 2 to reduce the oil pressure, at this time the controller 2 will send a signal to connect the middle position of the electro-hydraulic reversing valve 6, The four pipelines of the electro-hydraulic reversing valve will all be closed, and the whole system will stop moving.

Further, as shown in Figures 1 and 2, the above-mentioned mixer truck may also include: a hydraulic motor 16, and the hydraulic motor 16 is arranged on the front support 11;

The output end of the hydraulic pump 4 is also connected to the oil inlet of the hydraulic motor 16, and the oil outlet of the hydraulic motor 16 is connected to the oil tank 3;

The hydraulic motor 16 is used to drive the tank body of the mixer truck to rotate.

As mentioned above, the two ends of the tank body supported by the front support 11 and the rear support 12 can adopt the following specific structural methods: the output shaft of the hydraulic motor 16 is fixedly connected with the tank body of the mixer truck, and at the same time, the output shaft of the hydraulic motor 16 is also connected to the front support. The seats 11 are connected by bearings, so that the relative movement of the tank body and the front support 11 can be limited while the tank body rotates, so that the front end of the tank body can be safely and reliably fixed on the front support 11.

Support wheels can be arranged on the rear support 12, and the end of the tank body can be supported by the support wheels without hindering the rotation of the tank body.

Certainly, the embodiment of the present invention is not limited to the above-mentioned specific support manner.

Further, the driving mechanism further includes: an accumulator 15 located between the hydraulic motor 16 and the hydraulic pump 4 and connected to the oil inlet of the hydraulic motor 16 , the hydraulic pump 4 and the electro-hydraulic reversing valve 6 respectively.

Under normal conditions, the engine 5 (the embodiment of the present invention does not limit its power source) works all the time to pump the oil out of the fuel tank to provide a steady stream of power to the hydraulic motor 16, and the mixer truck does not need to move the tank according to the steering In the case of a body, the accumulator 15 can be used as an auxiliary power source. At this time, part of the hydraulic oil output from the hydraulic pump 4 enters the hydraulic motor 16 on the mixer truck, drives the hydraulic motor 16 to rotate and drives the tank to rotate to prevent the cement in the tank from solidifying, and the other part flows into the accumulator 15 for storage. . When the speed of the mixer truck and the steering parameters reach the preset conditions and the tank needs to be driven to move, the accumulator 15 can supply oil to the hydraulic cylinders in the front hydraulic cylinder member 7 and the rear hydraulic cylinder member 8 together with the hydraulic pump 4, Thereby finally control the tank body to adjust the center of gravity to prevent rollover. Due to the existence of the accumulator 15, in the selection of components, a hydraulic pump 4 with a relatively low specification can be selected, which will help reduce the cost of the entire mixer truck accordingly. Especially when the hydraulic pump 4 fails, the role of the accumulator 15 is even more important. At this time, the accumulator 15 can be used as an emergency power source to provide hydraulic oil for the hydraulic cylinder so as to ensure that the mixer truck can be operated in a timely manner. Adjust its center of gravity to effectively prevent rollover.

Further, as shown in Figures 1 and 2, the driving mechanism of the mixer truck provided by the embodiment of the present invention may also include some auxiliary components, specifically including: a coarse filter 17, a one-way valve 18, an unloading valve 19, an automatic alarm filter Device 20, accumulator pressure gauge 21, speed control valve 22, control handle 23, etc.;

The one-way valve 18 is located between the accumulator 15 and the hydraulic pump 4, the control handle 23 is respectively connected with the oil inlet pipeline and the oil outlet pipeline of the hydraulic motor 16, and a speed regulating valve 22 is installed between the accumulator 15 and the control handle 23 , the one-way valve 18 is connected with the unloading valve 19, the hydraulic pump 4 and the electro-hydraulic reversing valve 6 respectively, one end of the automatic alarm filter 20 is connected with the unloading valve 19, and the other end is connected with the fuel tank 3, and the coarse filter 17 is located in the fuel tank 3 inside and connected with the hydraulic pump 4;

The accumulator 15 is equipped with an accumulator pressure gauge 21 for monitoring the pressure in the accumulator 15, the control handle 16 is used for controlling the flow direction of the hydraulic oil in the hydraulic motor 16, and the speed regulating valve 22 is used for regulating the flow of the hydraulic oil flowing into the hydraulic motor 16. The flow rate of the hydraulic oil, the one-way valve 18 is used to control the flow direction of the high-pressure hydraulic oil of the hydraulic pump 4, and the unloading valve 19 is used to unload the hydraulic pump 4 when the pressure in the accumulator 15 reaches the set value to prevent the flow of The hydraulic oil pressure in the hydraulic cylinder is too high.

The mixer truck provided by the embodiment of the present invention controls the movement of the tank body in the steering direction when there may be a risk of rollover. It has a high degree of automation and does not require manual operation. By independently adjusting the center of gravity of the entire vehicle, it is possible to prevent the mixer truck from overturning. occurrence, can avoid secondary damage to small cars and pedestrians passing by, has high safety and reliability, and has broad application prospects.

The serial numbers of the above embodiments of the present invention are for description only, and do not represent the advantages and disadvantages of the embodiments.

Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and equivalent technologies thereof, the present invention also intends to include these modifications and variations.

Claims (10)

1. A mixer truck, characterized in that it comprises: an electronic control subsystem and a drive mechanism, wherein: The electronic control subsystem is connected to the driving mechanism; The electronic control subsystem is used to collect the vehicle speed signal, steering parameter signal and steering return signal of the mixer truck, and when the vehicle speed signal and steering parameter signal meet the set conditions, send a signal to the driving mechanism. The first control signal used to instruct the tank body of the mixer truck to move in the steering direction of the mixer truck, and after the tank body moves, when the steering return signal of the mixer truck is collected, send to the The drive mechanism sends out a second control signal for instructing the return of the tank body; The driving mechanism is used to drive the tank body to move in the direction indicated by the received first control signal or the second control signal. 2. The mixer truck according to claim 1, wherein the electronic control subsystem comprises: a rotation angle sensor (1), a vehicle speed sensor and a controller (2), and the controller (2) is connected to the vehicle speed sensor respectively Connected with the rotation angle sensor (1); The vehicle speed sensor is used to collect the vehicle speed signal of the mixer truck; The rotation angle sensor (1) is used to collect the left-turn or right-turn steering parameter signal of the mixer truck; The controller (2) is configured to compare the steering parameter signal with a preset steering parameter threshold when the vehicle speed signal of the mixer truck is greater than the set vehicle speed threshold; When the threshold value of the steering parameter is lower than the threshold value of the steering parameter, a first control signal for instructing the tank body of the mixer truck to move to the steering direction of the mixer truck is sent to the driving mechanism. 3. The mixer truck according to claim 1 or 2, characterized in that the drive mechanism comprises: a fuel tank (3), a hydraulic pump (4), an engine (5) connected to the hydraulic pump (4), an electro-hydraulic Reversing valve (6), front end hydraulic cylinder component (7) and rear end hydraulic cylinder component (8); The electro-hydraulic reversing valve (6) includes a first input end, a first output end, a second input end and a second output end; The oil tank (3) is respectively connected to the second output end of the electro-hydraulic directional valve (6) and the input end of the hydraulic pump; the output end of the hydraulic pump (4) is connected to the second output end of the electro-hydraulic directional valve (6). (6) the first input end is connected; The hydraulic pump (4) is used to pressurize the hydraulic oil in the oil tank (3) and input it into the electro-hydraulic reversing valve (6); The first output end of the electro-hydraulic reversing valve (6), the front end hydraulic cylinder member (7), the rear end hydraulic cylinder member (8) and the second input end of the electro-hydraulic reversing valve (6) form a closed The hydraulic oil circuit, the electro-hydraulic reversing valve (6) is used to send hydraulic pressure to the front end through the hydraulic oil circuit according to the first control signal or the second control signal sent by the electronic control subsystem. The cylinder member (7) and the rod chamber or rodless chamber of each hydraulic cylinder in the rear hydraulic cylinder member (8) input pressurized hydraulic oil to control the rod chamber and rodless chamber of each hydraulic cylinder There is an oil pressure difference between them, so that the piston rods of the hydraulic cylinders in the front end hydraulic cylinder member (7) and the rear end hydraulic cylinder member (8) send the first control signal to the first control signal under the action of the pressure difference Or move in the direction indicated by the second control signal. 4. The mixer truck according to claim 3, characterized in that, the front end hydraulic cylinder member (7) comprises at least two hydraulic cylinders, the ends of the piston rods of the at least two hydraulic cylinders are connected together, and the at least two hydraulic cylinders arranged symmetrically with respect to a vertical line; The rear end hydraulic cylinder component (8) includes at least two hydraulic cylinders, the ends of the piston rods of the at least two hydraulic cylinders are connected together, and the at least two hydraulic cylinders are arranged symmetrically with respect to the vertical line; When the electro-hydraulic reversing valve (6) receives the first control signal or the second control signal indicating that the tank body of the mixer truck moves to the left, the left position of the electro-hydraulic reversing valve (6) is connected to , the first output end of the electro-hydraulic reversing valve (6) is respectively connected to the rodless chamber of the hydraulic cylinder on the right side of the vertical line in the front-end hydraulic cylinder member (7), the front-end hydraulic cylinder member (7) The rod cavity of the hydraulic cylinder on the left side of the vertical line in the middle, the rod cavity of the hydraulic cylinder on the left side of the vertical line in the rear end hydraulic cylinder member (8) and the The rodless cavity of the hydraulic cylinder on the right side of the vertical line is connected; the second input end of the electro-hydraulic reversing valve (6) is respectively connected to the hydraulic cylinder on the right side of the vertical line in the front end hydraulic cylinder member (7). rod cavity, the rodless cavity of the hydraulic cylinder on the left side of the vertical line in the front end hydraulic cylinder member (7), the rodless cavity of the hydraulic cylinder on the left side of the vertical line in the rear end hydraulic cylinder member (8), and The rod cavity of the hydraulic cylinder located on the right side of the vertical line in the rear hydraulic cylinder member (8) is connected; When the electro-hydraulic reversing valve (6) receives the first control signal or the second control signal indicating that the tank body of the mixer truck moves to the right, the electro-hydraulic reversing valve is connected to the right position, and the The first output end of the electro-hydraulic reversing valve (6) is respectively connected with the rod cavity of the hydraulic cylinder on the right side of the vertical line in the front end hydraulic cylinder component (7), and the vertical line in the front end hydraulic cylinder component (7). The rodless cavity of the hydraulic cylinder on the left side of the line, the rodless cavity of the hydraulic cylinder on the left side of the vertical line in the rear hydraulic cylinder component (8), and the rodless cavity of the hydraulic cylinder in the rear hydraulic cylinder component (8) on the right The rod chamber of the hydraulic cylinder on the side is connected; the second input end of the electro-hydraulic reversing valve (6) is respectively connected with the rodless chamber of the hydraulic cylinder on the right side of the vertical line in the front hydraulic cylinder member (7), The rod chamber of the hydraulic cylinder located on the left side of the vertical line in the front hydraulic cylinder member (7), the rod chamber of the hydraulic cylinder located on the left side of the vertical line in the rear hydraulic cylinder member (8), and the rear Connect the rodless cavity of the cylinder located to the right of the vertical line in the end cylinder member (8). 5. The mixer truck according to claim 4, further comprising: a front guide rail (9), a rear guide rail (10), a front support (11) matched with the front guide rail (9), and a Describe the rear support (12) that the rear guide rail (10) cooperates; The front guide rail (9) and the rear guide rail (10) are installed on the frame of the mixer truck; The front support (11) and the rear support (12) are used to rotatably support the two ends of the tank body of the mixer truck; The connecting points of the piston rods of the at least two hydraulic cylinders in the front end hydraulic cylinder member (7) are connected to the front support (11); the at least two hydraulic cylinder members in the rear end hydraulic cylinder member (8) The connection point of the piston rod of the hydraulic cylinder is connected with the rear support (12). 6. The mixer truck according to claim 5, characterized in that, the at least two hydraulic cylinder barrels in the front end hydraulic cylinder member (7) are connected to the front guide rail (9); The at least two hydraulic cylinder barrels in the rear end hydraulic cylinder member (8) are connected to the rear guide rail (10). 7. The mixer truck according to claim 5, characterized in that, the two ends of the front guide rail (9) and/or the rear guide rail (10) are respectively provided with limit blocks (13); The limit block (13) is used to limit the moving range of the front support (11) on the front guide rail (9) and the rear support (12) on the rear guide rail (10). 8. The mixer truck according to claim 3, characterized in that, the electronic control subsystem further comprises: a pressure relay (14), the pressure relay (14) is connected to the controller (2) and the The output pipeline of the electro-hydraulic reversing valve (6) is connected to monitor whether the oil pressure output by the electro-hydraulic reversing valve (6) is greater than the set threshold, and if so, feedback to the controller (2) Signal to reduce oil pressure. 9. The mixer truck according to claim 5, further comprising: a hydraulic motor (16), the hydraulic motor (16) being arranged on the front support; The output end of the hydraulic pump (4) is also connected to the oil inlet of the hydraulic motor (16), and the oil outlet of the hydraulic motor (16) is connected to the oil tank (3); The hydraulic motor (16) is used to drive the tank body of the mixer truck to rotate. 10. The mixer truck according to claim 9, characterized in that, the driving mechanism further comprises: an accumulator (15), the accumulator (15) is located between the hydraulic motor (16) and the hydraulic pressure Between the pumps (4), the oil inlet of the hydraulic motor (16), the hydraulic pump (4) and the electro-hydraulic reversing valve (6) are respectively connected.