Rigid dumper loading brake system control device

Abstract

The utility model relates to the technical field of engineering machinery, in particular to a rigid dumper loading brake system control device which comprises a fixedly-arranged main machine frame, the interior of the main machine frame is hollow, a loading carriage is arranged above the main machine frame, and a rear hinge point of the loading carriage is hinged to the main machine frame. Lifting oil cylinders are arranged on the two sides of the main machine frame respectively, the lower ends of the two lifting oil cylinders are hinged to the corresponding positions of the two side walls of the main machine frame respectively, and the upper ends of the two lifting oil cylinders are hinged to front hinge points at the corresponding positions of the loading compartment respectively. A position sensor used for detecting the position of the loading carriage is arranged below the front end of the loading carriage, an abutting piece is arranged at the bottom of the loading carriage, and a bearing piece is arranged at the corresponding position in an inner cavity of the main rack. The utility model has the following beneficial effects: by independently controlling the control switch of the lifting oil cylinder, the lifting of the loading carriage and the loading braking are orderly implemented; and the response speed of the loading brake hydraulic system is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of engineering machinery, in particular to a control device for a loading brake system of a rigid dump truck. Background Art

[0002] Rigid dump trucks are a type of non-road mining transport vehicle, widely used in surface stripping work and subsequent ore transportation work in sandstone mines, metal mines, coal mines and other minerals. The braking system of rigid dump trucks currently used in mining mainly includes service brakes, emergency brakes and loading brakes.

[0003] Among them, when the loading brake system is turned on, the vehicle's rear wheel hydraulic brakes work alone, thereby ensuring that the rigid dump truck is stable during the lifting or lowering of the car body, so as to prevent safety accidents caused by vehicle instability.

[0004] For example, in the patent document with patent publication number CN218021577U, a loading brake system and an engineering vehicle are disclosed, which include an air compressor; a plurality of air cylinders, respectively connected to the air compressor; a brake pedal valve, one end of which is respectively connected to the second air cylinder and the third air cylinder, and the other end is respectively connected to the front axle brake air chamber and the shuttle valve; a relay valve, a control port of which is connected to the shuttle valve, and the second port is respectively connected to the middle axle brake air chamber and the rear axle brake air chamber; a parking brake solenoid valve, one port of which is connected to the shuttle valve, and the other end is respectively connected to the third air chamber and the first port of the relay valve.

[0005] According to the existing technical literature, the driver can realize the loading brake of the engineering vehicle by pressing the loading brake button on the control panel of the cab. However, the loading brake button and the car body lifting button are set separately, and the driver needs to operate them separately, which may easily cause the driver to forget to press the loading brake button and lift the car body, or release the loading brake before the car body is lowered into place, thereby causing safety accidents.

[0006] To this end, the utility model optimizes and improves the problem of independent control of loading brake and car lifting in the prior art, and hereby proposes a control device that can automatically open and close the loading brake when the car is lifted or lowered, so as to better solve the problems in the prior art. Utility Model Content

[0007] The utility model is to solve one of the above technical problems, and the technical solution adopted is: a control device for a loading brake system of a rigid dump truck, comprising a main frame fixedly arranged on the rigid dump truck, the interior of the main frame is hollow, a loading compartment is arranged above the main frame, a rear hinge point of the loading compartment is hingedly connected to the main frame, lifting cylinders are respectively arranged on both sides of the main frame, the lower ends of the two lifting cylinders are respectively hingedly connected to the corresponding positions of the two side walls of the main frame, the upper ends of the two lifting cylinders are respectively hingedly connected to the front hinge points at the corresponding positions of the loading compartment, a position sensor for detecting the position of the loading compartment is arranged below the front end of the loading compartment, a pressing member is arranged at the bottom of the loading compartment, and a receiving member is arranged at the corresponding position in the inner cavity of the main frame.

[0008] In any of the above schemes, it is preferred that the pressure member includes a connecting column, the upper end of which is fixedly connected to the middle of the bottom surface of the loading compartment, a cylindrical sliding groove is vertically opened inside the connecting column, a spring is vertically fixedly connected to the top of the sliding groove, the lower end of the spring is fixedly connected to the top surface of a sliding matching block, the bottom of the sliding matching block is fixedly connected to the upper end of an abutment rod, a through hole is opened on the lower end surface of the connecting column, the lower end of the abutment rod passes through the through hole and is used to abut against the receiving member.

[0009] In any of the above schemes, it is preferred that the receiving member includes a pressure plate, which is fixedly installed at a corresponding position in the inner cavity of the main frame, and a through groove is opened on the top of the main frame, and the through groove is arranged above the pressure plate. In a working state, the lower end of the abutment rod passes through the through groove and abuts against the top of the pressure plate, and a weighing sensor is provided at the bottom of the pressure plate, and the weighing sensor is fixedly installed in the inner cavity of the main frame.

[0010] In any of the above solutions, preferably, the position sensor is fixedly mounted on a side wall of the main frame via a mounting seat.

[0011] In any of the above solutions, preferably, the circumferential outer wall of the sliding fitting block abuts against the circumferential inner wall of the sliding groove.

[0012] In any of the above solutions, preferably, the inner diameter of the through hole is smaller than the inner diameter of the sliding groove.

[0013] In any of the above solutions, it is preferred that the lifting cylinder is a multi-stage hydraulic cylinder.

[0014] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0015] 1. The utility model is provided with a position sensor on the main frame, so that when the loading compartment is raised or lowered, the position sensor can automatically sense the position change of the loading compartment, thereby automatically applying loading brake to the dump truck or releasing its braking state, and realizing the orderly implementation of the lifting and lowering of the loading compartment and the loading brake by controlling the control switch of the lifting cylinder separately, avoiding the driver's operating errors and improving the operation safety.

[0016] 2. The utility model is provided with a pressure plate and a weighing sensor. When the loading compartment just starts to move up or is about to move down to its original position, the abutment rod is pressed against the pressure plate under the action of the spring and its pressing pressure keeps changing, so that the weighing sensor can receive different pressure signals, thereby controlling the loading brake hydraulic oil circuit to perform corresponding work in advance, thereby providing a certain time for the hydraulic oil to flow, ensuring that the oil pressure meets the working requirements when the loading compartment moves to the corresponding position, and then the loading brake or brake release is performed under the detection of the position sensor, which greatly improves the response speed of the loading brake hydraulic system. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solution of the specific implementation of the utility model, the following will briefly introduce the drawings required for the specific implementation. In all the drawings, similar elements or components are generally identified by similar reference numerals. In the drawings, each element or component is not necessarily drawn according to the actual scale.

[0018] Figure 1 This is a front view structural schematic diagram of the utility model.

[0019] Figure 2 It is a schematic diagram of the hinged structure action in the front view of the utility model.

[0020] Figure 3 It is a partial cross-sectional view of the utility model in the side view direction.

[0021] Figure 4 It is a schematic diagram of the action of the pressing member of the utility model when viewed from the side.

[0022] In the figure, 1, main frame; 2, loading compartment; 3, lifting cylinder; 4, position sensor; 5, connecting column; 6, sliding groove; 7, sliding matching block; 8, spring; 9, abutment rod; 10, through hole; 11, pressure plate; 12, weighing sensor; 13, mounting seat; 14, through groove. DETAILED DESCRIPTION

[0023] The following is a detailed description of the embodiments of the technical solution of the utility model in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and are therefore only used as examples, and cannot be used to limit the scope of protection of the utility model. Figure 1-Figure 4 as shown in .

[0024] A control device for a loading brake system of a rigid dump truck comprises a main frame 1 fixedly arranged on the rigid dump truck, the interior of the main frame 1 is hollow, a loading compartment 2 is arranged above the main frame 1, a rear hinge point of the loading compartment 2 is hingedly connected to the main frame 1, lifting cylinders 3 are respectively arranged on both sides of the main frame 1, the lower ends of the two lifting cylinders 3 are respectively hingedly connected to corresponding positions of the two side walls of the main frame 1, the upper ends of the two lifting cylinders 3 are respectively hingedly connected to front hinge points at corresponding positions of the loading compartment 2, a position sensor 4 for detecting the position of the loading compartment 2 is arranged below the front end of the loading compartment 2, a pressing member is arranged at the bottom of the loading compartment 2, and a receiving member is arranged at a corresponding position in the inner cavity of the main frame 1.

[0025] The utility model includes a main frame 1 fixedly mounted on a rigid dump truck, a hinge point is arranged at the rear end of the main frame 1, the middle part of the bottom surface of the loading compartment 2 is pressed against the top of the main frame 1, and at the same time, the rear hinge point of the loading compartment 2 is hingedly connected to the rear hinge point of the main frame 1 through a pin, so that the front end of the loading compartment 2 can be opened at a certain angle relative to the front end of the main frame 1, so as to realize the unloading of the loading compartment 2. Lifting cylinders 3 are respectively arranged on both sides of the front end of the main frame 1, and at the same time, the lower end of the lifting cylinder 3 is hingedly connected to the side wall of the main frame 1, and the upper end thereof is hingedly connected to the corresponding position at the bottom of the loading compartment 2, and under the synchronous extension and contraction of the two lifting cylinders 3, the automatic rise and fall of the front end of the loading compartment 2 is realized. A control button for controlling the extension and contraction of the lifting cylinder 3 is arranged on the control panel in the cab.

[0026] A position sensor 4 is arranged below the front end of the loading compartment 2. The position sensor 4 is fixed and does not move with the up and down movement of the loading compartment 2. Its function is to monitor the position of the loading compartment 2 and send out a corresponding signal. Then, the existing program controller directly controls the operation of the loading brake hydraulic system to load brake the dump truck or release its brake state. When the driver turns on the control button for controlling the lifting cylinder 3, the two lifting cylinders 3 work and extend, and the front end of the loading compartment 2 rises upward. Then, the position sensor 4 cannot detect the position of the loading compartment 2, and then cuts off the signal to the existing controller. Then, through the existing program, the controller determines that the loading compartment 2 has been raised at this time, and sends out a command to let the loading brake hydraulic system load brake the rear wheels of the vehicle. At the same time, the loading brake indicator light on the cab console lights up in red, indicating that the loading brake is in the on state at this time, and the vehicle is not allowed to move. When the driver turns off the control button for controlling the lifting cylinder 3, the two lifting cylinders 3 work and retract, and the front end of the loading compartment 2 drops downward. When the position sensor 4 detects the loading compartment 2, the communication signal from the position sensor 4 to the existing controller is restored. Through the existing program, the controller determines that the compartment has been lowered into place, and issues a command to release the braking effect of the loading brake hydraulic system on the rear wheels of the vehicle. At the same time, the loading brake indicator light lights up green, indicating that the loading compartment 2 has been lowered into place, the loading brake has been released, and the vehicle can move.

[0027] In the process of detecting the position of the loading compartment 2 by the position sensor 4 and thus braking or releasing the brakes on the dump truck, the loading compartment 2 is in an ascending or descending state. However, there is a certain distance from the hydraulic oil tank to the execution end of the loading brake hydraulic system, and the flow of the hydraulic oil requires a certain amount of time. Therefore, there is a certain delay in the implementation and release of the loading brake. In order to avoid the influence of this delay, the utility model fixes a pressure piece at the bottom of the loading compartment 2, and fixes a receiving piece at a corresponding position in the inner cavity of the main frame 1. With the cooperation of the pressure piece and the receiving piece, a certain flow time can be provided to the hydraulic oil before the loading brake is performed, thereby ensuring that when the position sensor 4 cannot detect the loading compartment 2, the dump truck can be braked in time.

[0028] In any of the above schemes, it is preferred that the pressure member includes a connecting column 5, the upper end of which is fixedly connected to the middle of the bottom surface of the loading compartment 2, a cylindrical sliding groove 6 is vertically opened inside the connecting column 5, a spring 8 is vertically fixedly connected to the top of the sliding groove 6, the lower end of the spring 8 is fixedly connected to the top surface of a sliding matching block 7, the bottom of the sliding matching block 7 is fixedly connected to the upper end of an abutting rod 9, a through hole 10 is opened on the lower end surface of the connecting column 5, the lower end of the abutting rod 9 passes through the through hole 10 and is used to abut against the receiving member.

[0029] The connecting column 5 is fixedly arranged, and the sliding matching block 7 can slide in the sliding groove 6. In the initial state, under the action of the spring 8, the sliding matching block 7 is located at the lower end of the sliding groove 6. When an external force acts on the abutment rod 9, the sliding matching block 7 can move upward along the sliding groove 6.

[0030] In any of the above schemes, it is preferred that the receiving part includes a pressure plate 11, and the pressure plate 11 is fixedly installed at a corresponding position in the inner cavity of the main frame 1. A through groove 14 is opened on the top of the main frame 1, and the through groove 14 is arranged above the pressure plate 11. In the working state, the lower end of the abutment rod 9 passes through the through groove 14 and abuts against the top of the pressure plate 11. A weighing sensor 12 is provided at the bottom of the pressure plate 11, and the weighing sensor 12 is fixedly installed in the inner cavity of the main frame 1.

[0031] When the loading compartment 2 is always stably located on the top of the main frame 1, the lower end of the abutment rod 9 is stably abutted against the top of the pressure plate 11, and at this time, the pressure applied by the abutment rod 9 to the pressure plate 11 is always at a stable value.

[0032] When the loading compartment 2 just starts to be lifted upward, the connecting column 5 moves slightly upward with the loading compartment 2, and the abutment rod 9 moves slowly downward along the sliding groove 6 under the action of the spring 8, and its lower end portion is always kept pressed against the top of the pressure plate 11. Therefore, the pressure applied to the pressure plate 11 by the abutment rod 9 is continuously changing at this time. After that, the weighing sensor 12 controls the loading brake hydraulic oil circuit to work in advance through the existing program controller after receiving different pressure signals, providing a certain time for the flow of hydraulic oil. When the loading compartment 2 continues to move upward and the position sensor 4 cannot detect the position of the loading compartment 2, the oil pressure is sufficient for loading braking, and then the corresponding signal is transmitted to the existing controller through the position sensor 4 to complete the loading braking, thereby greatly improving the response speed of the loading braking.

[0033] When the loading compartment 2 descends, under the action of the spring 8, the lower end of the abutment rod 9 extends out and slowly abuts against the pressure plate 11, and then the loading compartment 2 continues to slowly descend. At this time, the pressure applied by the abutment rod 9 to the pressure plate 11 also changes continuously. After that, the weighing sensor 12 controls the loading brake hydraulic oil circuit to work in advance through the existing program controller after receiving different pressure signals, providing a certain time for the flow of hydraulic oil. When the position sensor 4 can detect the position of the loading compartment 2, the oil pressure has met the requirements for releasing the brake, and then the corresponding signal is transmitted to the existing controller through the position sensor 4 to release the loading brake, thereby greatly improving the response speed.

[0034] In any of the above solutions, preferably, the position sensor 4 is fixedly mounted on a side wall of the main frame 1 via a mounting seat 13 .

[0035] The position sensor 4 is fixedly mounted on the mounting base 13, and the mounting base 13 is fixedly connected to a side wall of the main frame 1. When the front end of the loading compartment 2 moves up by about 5 mm, the position sensor 4 cannot detect the position of the loading compartment 2. Correspondingly, when the front end of the loading compartment 2 moves down until it is less than 5 mm from the top of the main frame 1, the position sensor 4 can continue to detect the loading compartment 2.

[0036] The movement stroke of the sliding matching block 7 in the sliding groove 6 is between 5mm and 10mm, so that the extension distance of the lower end of the abutting rod 9 is greater than 5mm, thereby ensuring that before the front end of the loading compartment 2 moves up so that the position sensor 4 cannot detect the loading compartment 2, the lower end of the abutting rod 9 always presses against the pressure plate 11, ensuring that before the front end of the loading compartment 2 moves down so that the position sensor 4 can continue to detect the loading compartment 2, the lower end of the abutting rod 9 first contacts the main frame 1. In this way, the advance control of the loading brake hydraulic oil circuit is realized.

[0037] In any of the above solutions, preferably, the circumferential outer wall of the sliding matching block 7 is fitted and abutted against the circumferential inner wall of the sliding groove 6. The fitting and abutting of the two can ensure smooth sliding.

[0038] In any of the above solutions, preferably, the inner diameter of the through hole 10 is smaller than the inner diameter of the sliding groove 6. The smaller inner diameter of the through hole 10 can enable the lower end of the connecting column 5 to limit the sliding matching block 7.

[0039] In any of the above solutions, it is preferred that the lifting cylinder 3 is a multi-stage hydraulic cylinder.

[0040] Specific working principle:

[0041] When the loading compartment 2 is always stably on the top of the main frame 1, the pressure applied by the abutment rod 9 to the pressure plate 11 is always at a stable value. When the front end of the loading compartment 2 needs to be lifted, the driver presses the control switch for controlling the lifting cylinder 3 in the cab, and then the two lifting cylinders 3 extend synchronously, and the front end of the loading compartment 2 rises upward. At the beginning of the upward rise, the abutment rod 9 will remain pressed against the top of the pressure plate 11 under the action of the spring 8, but the pressure applied by the abutment rod 9 to the pressure plate 11 is continuously changing. After receiving different pressure signals, the weighing sensor 12 controls the loading brake hydraulic oil circuit to work in advance through the existing program controller, thereby providing a certain time for the hydraulic oil to flow, ensuring that the oil pressure meets the working requirements when the loading compartment moves to the corresponding position. When the front end of the loading compartment 2 moves up about 5mm, the position sensor 4 cannot detect the position of the loading compartment 2, and then the transmission signal from the position sensor 4 to the existing program controller is cut off, and then the loading brake hydraulic system is controlled by the existing program controller to load the rear wheels of the vehicle. Braking.

[0042] When it is necessary to lower the front end of the loading compartment 2, press the control switch of the lifting cylinder 3, the two lifting cylinders 3 retract synchronously, and the front end of the loading compartment 2 drops downward. When the loading compartment 2 is about to drop back to its original position, the lower end of the abutment rod 9 first abuts against the pressure plate 11, and then as the loading compartment 2 continues to slowly descend, the pressure applied to the pressure plate 11 by the abutment rod 9 also changes continuously. Then, after receiving different pressure signals, the weighing sensor 12 controls the loading brake hydraulic oil circuit to work in advance through the existing program controller, thereby providing a certain amount of time for the hydraulic oil to flow, ensuring that the oil pressure meets the working requirements when the loading compartment descends to the corresponding position. Then, when the front end of the loading compartment 2 moves down until it is less than 5 mm from the top of the main frame 1, the position sensor 4 detects the loading compartment 2 again, thereby controlling the loading brake hydraulic system through the existing program controller to release the braking state of the rear wheels of the vehicle.

[0043] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

[0044] The matters not described in detail in the present invention are all known technologies to those skilled in the art.

Claims

1. A rigid dump truck loading brake system control device, characterized in that: The invention comprises a main frame (1) fixedly mounted on a rigid dump truck, the interior of the main frame (1) being hollow, a loading compartment (2) being arranged above the main frame (1), a rear hinge point of the loading compartment (2) being hingedly connected to the main frame (1), lifting cylinders (3) being arranged on both sides of the main frame (1), the lower ends of the two lifting cylinders (3) being hingedly connected to corresponding positions of the two side walls of the main frame (1), the upper ends of the two lifting cylinders (3) being hingedly connected to front hinge points at corresponding positions of the loading compartment (2), a position sensor (4) for detecting the position of the loading compartment (2) being arranged below the front end of the loading compartment (2), a pressing member being arranged at the bottom of the loading compartment (2), and a receiving member being arranged at a corresponding position in the inner cavity of the main frame (1).

2. A rigid dump truck loading brake system control device according to claim 1, characterized in that: The pressure member comprises a connecting column (5), the upper end of which is fixedly connected to the middle of the bottom surface of the loading compartment (2), a cylindrical sliding groove (6) is vertically provided inside the connecting column (5), a spring (8) is vertically fixedly connected to the top of the sliding groove (6), the lower end of the spring (8) is fixedly connected to the top surface of a sliding matching block (7), the bottom of the sliding matching block (7) is fixedly connected to the upper end of an abutting rod (9), a through hole (10) is provided on the lower end surface of the connecting column (5), the lower end of the abutting rod (9) passes through the through hole (10) and is used to abut against the receiving member.

3. A rigid dump truck loading brake system control device according to claim 2, characterized in that: The receiving member comprises a pressure plate (11), the pressure plate (11) being fixedly mounted at a corresponding position in the inner cavity of the main frame (1), a through slot (14) being provided at the top of the main frame (1), the through slot (14) being arranged above the pressure plate (11), the lower end of the abutment rod (9) passing through the through slot (14) and abutting against the top of the pressure plate (11) in a working state, a weighing sensor (12) being provided at the bottom of the pressure plate (11), the weighing sensor (12) being fixedly mounted in the inner cavity of the main frame (1).

4. A rigid dump truck loading brake system control device according to claim 3, characterized in that: The position sensor (4) is fixedly mounted on a side wall of the main frame (1) via a mounting seat (13).

5. A rigid dump truck loading brake system control device according to claim 4, characterized in that: The circumferential outer wall of the sliding matching block (7) abuts against the circumferential inner wall of the sliding groove (6).

6. A rigid dump truck loading brake system control device according to claim 5, characterized in that: The inner diameter of the through hole (10) is smaller than the inner diameter of the sliding groove (6).

7. A rigid dump truck loading brake system control device according to claim 6, characterized in that: The lifting cylinder (3) is a multi-stage hydraulic cylinder.

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