WO2012034446A1 - Manipulating system for a mixing drum of a concrete mixing transport truck - Google Patents

Abstract

The present invention provides a manipulating system for a mixing drum of a concrete mixing transport truck. The manipulating system comprises a variable displacement pump and a constant displacement motor, with the variable displacement pump being used to drive the constant displacement motor, and the constant displacement motor being used to drive the mixing drum. The manipulating system includes a pneumatic control unit, which pneumatic control unit controls a control handle (8) of the variable displacement pump by transmission of air pressure. Since the actions of the mixing drum are controlled by a pneumatic control unit, manipulation is simple and convenient and implementation is easy.

Description

 Control system of mixing drum of concrete mixer truck

 The invention relates to a control system for a mixing drum of a concrete mixer truck. Background technique

 For the current concrete mixer truck, the operation mode of the mixer drum is mainly divided into mechanical type and electronic control type, for example, CN2259322Y and CN101450511A. The mechanical type has a short service life, low reliability and is easy to damage; the electronic control type has high cost and is not easy to implement. Summary of the invention

 SUMMARY OF THE INVENTION It is an object of the present invention to provide an operating system for a mixing drum of a concrete mixer truck that is simple, convenient and easy to implement.

 In order to achieve the above object, the present invention provides an operating system of a mixing drum of a concrete mixer truck, the operating system including a variable pump for driving the metering motor and a metering motor for driving The mixing drum, the operating system includes an air control unit that controls the movement of the control handle of the variable pump by pneumatic transmission.

 Preferably, the air control unit comprises a gas source, a solenoid valve, a cylinder and a controller, wherein: the cylinder is connected to the gas source through the solenoid valve; a piston rod of the cylinder is connected to the variable pump The controller is electrically connected to the solenoid valve, and controls the movement of the solenoid valve to drive the piston rod of the cylinder to drive the control handle of the variable pump to move.

 Preferably, the cylinder is a multi-stage cylinder to control the mixing drum to be in different states. More specifically, the cylinder may be a three-stage cylinder to control the mixing drums to be in a feed, discharge, agitation, and stop state, respectively.

 Preferably, the cylinder comprises a cylinder and three stages of pistons each having a piston rod in the cylinder, and two chambers are formed on each side of each stage of the piston.

Preferably, the solenoid valve includes a first solenoid valve, a second solenoid valve, and a third solenoid valve. The intake pipe and the exhaust pipe of the first solenoid valve, the second solenoid valve, and the third solenoid valve are respectively connected to the two chambers on both sides of the corresponding piston.

 Preferably, the cylinder includes the following four working states: a first working state: the first electromagnetic valve is de-energized, the second electromagnetic valve is powered, and the third electromagnetic valve is de-energized, and the third-stage piston of the cylinder is at Retracting position; second working state: the first electromagnetic valve is de-energized, the second electromagnetic valve is de-energized, and the third electromagnetic valve is energized, the third-stage piston of the cylinder is in an extended position, the first-stage piston and The second stage piston is in the retracted position; the third working state: the first solenoid valve is energized, the second solenoid valve is energized, and the third solenoid valve is de-energized, and the first stage piston of the cylinder is in the extended position, The second stage piston and the third stage piston are in the retracted position; the fourth working state: the first electromagnetic valve is de-energized, the second electromagnetic valve is de-energized, the third electromagnetic valve is de-energized, and the second-stage piston of the cylinder In the extended position, the first stage piston and the third stage piston are in the retracted position.

 Preferably, when the cylinder is in the first working state, the mixing drum is in a feeding state; when the cylinder is in the second working state, the mixing drum is in a discharging state; when the cylinder is in a third state In the working state, the mixing drum is in a stirring state; when the cylinder is in the fourth working state, the mixing drum is in a stopped state.

 Preferably, the handling system includes an indoor steering panel and an outdoor steering panel, the indoor steering panel and the outdoor steering panel being selectively used to control the mixing drum in different states.

 Preferably, an indoor/outdoor switch is provided on the indoor control panel to select the indoor control panel or the outdoor control panel to control the mixing drum to be in different states.

 Through the above technical solution, the operation of the mixing drum is controlled by the air control unit, which is not only simple, convenient, and easy to implement. DRAWINGS

 The drawings are intended to provide a further understanding of the invention, and are in the In the drawing:

1 is a manipulation of a mixing drum of a concrete mixer truck according to an embodiment of the present invention Schematic diagram of the system.

 2 and 3 are schematic illustrations of one embodiment of an indoor manipulating panel and an outdoor manipulating panel, respectively.

 4 and 5 are schematic views of another embodiment of an indoor control panel and an outdoor control panel, respectively. detailed description

 The control system of the mixing drum of the concrete mixer truck generally includes a variable pump-quantitative motor closed hydraulic circuit. By adjusting the working state of the variable pump, for example, by mechanical or electronic control, the control handle of the variable pump is in different positions. The working state of the quantitative motor is controlled, and then the working state of the mixing drum can be controlled, for example, in different states such as feeding, discharging, stirring, and stopping.

 The key point of the present invention is that the control handle action of the variable pump is controlled by means of air control, thereby controlling the mixing drum to be in different working states. This type of control is not only easy to operate, but also simple to install and easy to implement on concrete mixer trucks.

 The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are intended to be illustrative and not restrictive.

 As shown in Fig. 1, according to an embodiment of the present invention, an air control unit mainly includes a gas source 1, a solenoid valve 5, a cylinder 6 and a controller (not shown). The cylinder 6 is connected to the air source 1 through a solenoid valve 5. The piston rod of cylinder 6 is connected to the control handle 8 of a variable pump (not shown). The controller is electrically connected to the solenoid valve 5, and controls the solenoid valve 5 to operate, so that the piston rod of the cylinder 6 can be driven to move, and then the control handle 8 of the variable pump can be driven (for example, rotated) to finally realize the control of the working state of the mixer drum. purpose.

 In the air control unit shown in Fig. 1, reference numeral 2 denotes a filter, 3 denotes a pressure reducing valve, and 4 denotes an oil mister. These elements are generally provided in a pneumatic circuit, and the present invention will not be described again.

For a general concrete mixer truck, the mixing drum has multiple working states, for example Such as feeding, discharging, stirring, stopping, etc. Therefore, in order to control the mixing drum to be in different operating states, the cylinder 6 used in the present invention is preferably a multi-stage cylinder (e.g., a three-stage cylinder). In order to control a multi-stage cylinder, the solenoid valve 5 also typically includes a plurality of solenoid valves (e.g., a first solenoid valve 51, a second solenoid valve 52, and a third solenoid valve 53).

 As shown in Fig. 1, as a preferred embodiment, the cylinder 6 is a three-stage cylinder, and the solenoid valve 5 includes a first solenoid valve 51, a second solenoid valve 52, and a third solenoid valve 53. The mixing drum corresponding to this embodiment can have four states of feeding, discharging, stirring and stopping.

 As a preferred embodiment, as shown in FIG. 1, the cylinder 6 is a three-stage cylinder, and there are three stages of pistons each having a piston rod inside the cylinder, and two sides are formed on each side of each stage of the piston. The air chamber, the intake pipe and the exhaust pipe of each solenoid valve are respectively connected to two air chambers on both sides of the corresponding piston. Therefore, by controlling the gain and loss of the first solenoid valve 51, the second solenoid valve 52, and the third solenoid valve 53 to control the communication state of the intake and exhaust pipes, the operating state of the three-stage cylinder can be controlled, thereby The working state of the mixing drum can be controlled.

 Specifically, for example, as an example, the cylinder 6 may include the following four operating states:

 The first working state: the first solenoid valve 51 is de-energized, the second solenoid valve 52 is energized, and the third solenoid valve 53 is de-energized, and the three-stage piston of the cylinder 6 is in the retracted position;

 The second working state: the first electromagnetic valve 51 is de-energized, the second electromagnetic valve 52 is de-energized, the third electromagnetic valve 53 is energized, the third-stage piston of the cylinder 6 is in the extended position, the first-stage piston and The second stage piston is in the retracted position;

 The third working state: the first solenoid valve 51 is energized, the second solenoid valve 52 is energized, the third solenoid valve 53 is de-energized, the first stage piston of the cylinder 6 is in the extended position, the second stage piston and The third stage piston is in the retracted position;

The fourth working state: the first electromagnetic valve 51 is de-energized, the second electromagnetic valve 52 is de-energized, the third electromagnetic valve 53 is de-energized, the second-stage piston of the cylinder 6 is in the extended position, the first-stage piston and The third stage piston is in the retracted position. Correspondingly, when the cylinder 6 is in the first working state, the mixing drum may be in a feeding state; when the cylinder 6 is in the second working state, the mixing drum may be in a discharging state; When the cylinder 6 is in the third working state, the mixing drum may be in a stirring state; when the cylinder 6 is in the fourth working state, the mixing drum may be in a stopped state. Of course, the invention is not limited to this particular implementation. For example, by changing the mounting orientation of the cylinder, or changing the relative positional relationship between the piston rod of the cylinder and the variable pump control handle, the correspondence between the working state of the cylinder and the working state of the mixing drum can be changed.

 In addition, by changing the connection relationship between the first solenoid valve 51, the second solenoid valve 52, and the third solenoid valve 53 and the cylinder 6, or exchanging the connection position of the inlet and exhaust pipes of any solenoid valve with the cylinder 6, or changing three The order of the solenoid valve's gain and de-energization can also achieve the feeding, discharging, stirring and stopping state of the mixing drum. For example, by interchangeing the connection position of the second solenoid valve 52 with the cylinder 6, the following result can be obtained: When the first solenoid valve 51 is energized, the second solenoid valve 52 is de-energized, and the third solenoid valve 53 is de-energized, The mixing drum is in a feeding state; when the first solenoid valve 51 is de-energized, the second solenoid valve 52 is de-energized, and the third solenoid valve 53 is energized, the mixing drum is in a discharging state; When the electromagnetic valve 51 is de-energized, the second electromagnetic valve 52 is de-energized, and the third electromagnetic valve 53 is de-energized, the mixing drum is in a stirring state; when the first electromagnetic valve 51 is de-energized, the second electromagnetic valve 52 is de-energized. When the third electromagnetic valve 53 is de-energized, the mixing drum is in a stopped state.

 As shown in FIGS. 2 and 3, in order to control the action of the solenoid valve, the operating system of the present invention may include an indoor operating panel and an outdoor operating panel, the indoor operating panel and the outdoor operating panel being selectively used to control the mixing drum in Different states.

 The outdoor control panel can be fixed to a suitable location on the concrete mixer truck as needed, or it can be held by the operator. When being held by an operator, the outdoor control panel can be electrically connected to the concrete mixer truck through a cable or the like, or can be electrically connected to the concrete mixer truck by wireless communication, that is, the state of the mixer drum is controlled by remote control. control.

An indoor/outdoor switch can be provided on the indoor control panel to select the indoor control panel or the outdoor control panel to control the mixing drum to be in different states. There are four switches of feeding, discharging, stirring and stopping on the indoor operation panel, respectively corresponding to the feeding, discharging, stirring and stopping states of the mixing drum.

 There are four switches of feeding, discharging, stirring and stopping on the outdoor operation panel, respectively corresponding to feeding, discharging, stirring and stopping of the mixing drum.

 As shown in FIG. 4 and FIG. 5, as another embodiment, a selection switch may be respectively disposed on the indoor operation panel and the outdoor operation panel, and the selection switch includes four feeding, discharging, stirring, and stopping. Gear position.

 The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments, and various simple modifications of the technical solutions of the present invention may be made within the scope of the technical idea of the present invention. For example, changing the number of stages of the cylinder, increasing or decreasing the working state of the mixing drum, changing the correspondence between the working state of the cylinder and the working state of the mixing drum, etc., all of these simple modifications are within the scope of protection of the present invention.

 In addition, it should be noted that the specific technical features described in the above specific embodiments may be combined in any suitable manner without contradiction. For example, there may be four switches or one on the indoor operation panel. The selector switch (including four gear positions) can also have four switches or one selector switch (including four gear positions) on the outdoor control panel. These two switch types can be combined in any combination, that is, the indoor control panel can have four The switch, the outdoor control panel may have a selector switch, or vice versa, these combinations are intended to fall within the scope of the present disclosure.

Claims

Rights request What is claimed is: 1. A control system for a mixer drum of a concrete mixer truck, the control system comprising a variable pump for driving the metering motor, and a metering motor for driving the mixer drum, Characterized by  The steering system includes an air control unit that controls the movement of the control handle (8) of the variable pump by means of pneumatic transmission. 2. The operating system according to claim 1, wherein the air control unit comprises a gas source (1), a solenoid valve (5), a cylinder (6) and a controller, wherein:  The cylinder (6) is connected to the gas source (1) through the electromagnetic valve (5);  a piston rod of the cylinder (6) is connected to a control handle (8) of the variable pump;  The controller is electrically connected to the solenoid valve (5), and controls the solenoid valve (5) to move to drive the piston rod of the cylinder (6) to move the control handle (8) of the variable pump. 3. The steering system according to claim 2, wherein the cylinder (6) is a multi-stage cylinder to control the mixing drum to be in different states. 4. The operating system according to claim 2, wherein the cylinder (6) is a three-stage cylinder to control the mixing drums to be in a feeding, discharging, stirring and stopping state, respectively. The operating system according to claim 4, wherein the cylinder (6) comprises a cylinder and three stages of pistons each having a piston rod in the cylinder, each side of the piston There are two chambers formed. 6. The operating system according to claim 5, wherein said solenoid valve (5) The first electromagnetic valve (51), the second electromagnetic valve (52) and the third electromagnetic valve (53) are included, the first electromagnetic valve (51), the second electromagnetic valve (52) and the third electromagnetic valve (53) The intake and exhaust pipes are respectively connected to the two chambers on both sides of the corresponding piston. 7. The operating system according to claim 6, wherein the cylinder (6) comprises the following four operating states:  The first working state: the first electromagnetic valve (51) is de-energized, the second electromagnetic valve (52) is powered, and the third electromagnetic valve (53) is de-energized, and the three-stage piston of the cylinder (6) is in a contraction Back position  a second working state: the first solenoid valve (51) is de-energized, the second solenoid valve (52) is de-energized, the third solenoid valve (53) is energized, and the third-stage piston of the cylinder (6) is in extension Out position, the first stage piston and the second stage piston are in the retracted position;  a third working state: the first solenoid valve (51) is energized, the second solenoid valve (52) is energized, the third solenoid valve (53) is de-energized, and the first stage piston of the cylinder (6) is extended Out position, the second stage piston and the third stage piston are in the retracted position;  The fourth working state: the first electromagnetic valve (51) is de-energized, the second electromagnetic valve (52) is de-energized, the third electromagnetic valve (53) is de-energized, and the second-stage piston of the cylinder (6) is in the extension In the out position, the first stage piston and the third stage piston are in the retracted position. 8. The operating system of claim 7 wherein:  When the cylinder (6) is in the first working state, the mixing drum is in a feeding state; when the cylinder (6) is in the second working state, the mixing drum is in a discharging state; when the cylinder (6) When in the third working state, the mixing drum is in a stirring state; when the cylinder (6) is in the fourth working state, the mixing drum is in a stopped state. The operating system according to any one of claims 1-8, wherein the operating system comprises an indoor operating panel and an outdoor operating panel, the indoor operating panel and the outdoor operating panel A panel is selectively used to control the mixing drum in different states. 10. The operating system according to claim 9, wherein an indoor/outdoor switch is provided on the indoor control panel to select the indoor control panel or the outdoor control panel to control the mixing drum to be in different states.