Roller vibration damping control system and vibration damping control method

Abstract

The application discloses a road roller damping control system and a damping control method, and relates to the field of road roller damping control systems.The road roller damping control system comprises a damping system, an electronic clutch actuator, an air source and a controller; the damping system comprises a damper, an air nozzle and an air chamber are arranged on the damper, the air nozzle is in communication with the air chamber, the electronic clutch actuator comprises a pressure sensor, an exhaust electromagnetic valve, an air inlet electromagnetic valve, an air inlet channel and an exhaust channel, the pressure sensor is used for detecting the pressure value in the air chamber, the air inlet channel is connected with the air source, the exhaust electromagnetic valve and the air inlet electromagnetic valve are connected with the air nozzle through air pipes respectively, and the pressure sensor, the exhaust electromagnetic valve and the air inlet electromagnetic valve are connected with the controller respectively.The road roller damping control system can change the stiffness of the damper in real time and adjust the stiffness to a comfortable stiffness area, and the user comfort of the road roller is effectively improved.

Description

Technical Field

[0001] This invention relates to a vibration reduction control system and method for road rollers, belonging to the field of engineering machinery technology. Background Technology

[0002] Currently, the cab shock absorbers of domestic road rollers have fixed stiffness. When compaction operations are carried out, the cab vibration amplitude is large under conditions such as poor road surface conditions, activation of vibration mode, or over-compaction, resulting in heavy physical load and serious injury to the operator after long-term operation. Summary of the Invention

[0003] To address the problems existing in the prior art, the present invention provides a road roller vibration damping control system and vibration damping control method, which can change the stiffness of the shock absorber in real time and adjust it to the comfortable stiffness range, effectively improving the comfort of road roller users.

[0004] To achieve the above objectives, the present invention employs a road roller vibration reduction control system, including a vibration reduction system, an electronic clutch actuator, an air source, and a controller;

[0005] The shock absorption system includes a shock absorber, which is equipped with an air nozzle and an air chamber. The air nozzle is connected to the air chamber. The electronic clutch actuator includes a pressure sensor, an exhaust solenoid valve, an intake solenoid valve, an intake channel, and an exhaust channel. The pressure sensor is used to detect the pressure value in the air chamber. The intake channel is connected to an air source. The exhaust solenoid valve and the intake solenoid valve are respectively connected to the air nozzle through air pipes. The pressure sensor, the exhaust solenoid valve, and the intake solenoid valve are respectively connected to the controller.

[0006] The controller receives the detection signal from the pressure sensor and transmits the feedback signal to the electronic clutch actuator. After receiving the feedback signal, the electronic clutch actuator generates an action to control the air chamber of the shock absorption system to inflate and deflate, thereby realizing automatic shock absorption control.

[0007] As an improvement, the shock absorption system also includes a frame connecting plate, end flanges, and a cab connecting plate;

[0008] The shock absorber is installed between the frame connecting plate and the cab connecting plate. The shock absorber is fastened with bolts and nuts, and a rubber pad is installed between the shock absorber and the cab connecting plate.

[0009] As an improvement, the bolt is fitted with a wear-resistant tube with a smooth outer ring.

[0010] As an improvement, the shock absorber is arranged concentrically with the frame connecting plate, the cab connecting plate, and the end flange.

[0011] As an improvement, the end flange is made of two structural plates welded together, one of which has several through holes.

[0012] As an improvement, the shock absorber also includes a connector, a shock absorber body, and a shock absorber spring.

[0013] The shock-absorbing spring is installed inside the shock absorber body, the air nozzle is installed on one side of the shock absorber body, the air chamber is installed inside the shock absorber body, and the connecting body is installed on the top of the shock absorber body.

[0014] As an improvement, the connecting body is made of metal; the shock absorber is made of elastic material; and the shock absorber sheet is made of spring steel.

[0015] As an improvement, the electronic clutch actuator includes a cavity, on which the pressure sensor is installed. A push rod is installed at one end of the cavity and connected to a piston. A spring is arranged on the front side of the piston. The exhaust solenoid valve, intake solenoid valve, intake channel, and exhaust channel are installed at the other end of the cavity.

[0016] In addition, the present invention also provides a vibration reduction control method for the aforementioned road roller vibration reduction control system, comprising the following steps:

[0017] 1) When the road roller is turned on, the controller receives the signal from the pressure sensor on the electronic clutch actuator and determines whether the set minimum pressure value has been reached. If not, the controller sends an action signal to the electronic clutch actuator, which then inflates the air chamber until the set target pressure value is reached.

[0018] 2) After the minimum pressure value is met, the controller performs logical analysis on the interval amplitude value within the set time interval to determine whether all amplitude values ​​are within the set amplitude range. If so, the controller does not send an action signal; otherwise, the controller sends an action signal to the solenoid valve of the electronic clutch actuator. The electronic clutch actuator performs the air release action of the air chamber until the maximum value of the set amplitude range is reached, and then issues a stop action signal.

[0019] 3) The controller performs cyclic detection of the pressure of the electronic clutch actuator.

[0020] As an improvement, the air filling and de-airing operation of the electronic clutch actuator is specifically as follows:

[0021] When the push rod needs to move forward to push the load, the controller controls the coarse intake solenoid valve of the electronic clutch actuator to make the push rod approach the target position, and then controls the fine intake solenoid valve to precisely adjust the position of the push rod. The pressure sensor on the electronic clutch actuator accurately detects and feeds back the signal, and the controller controls the push rod to start and stop, forming a closed-loop control.

[0022] When the push rod needs to move backward, the controller controls the coarse exhaust solenoid valve to exhaust air, so that the push rod approaches the target position. Then, it controls the fine exhaust solenoid valve to precisely control the start and stop of the push rod. The pressure sensor can provide feedback at all times and the controller controls the start and stop of the push rod to ensure precise control of the air pressure in the electronic clutch actuator, that is, precise control of the air pressure in the air chamber of the shock absorber.

[0023] Compared with the prior art, the vibration damping control system of the road roller of the present invention is applicable to any working condition, automatically adjusts the amplitude of the cab to a comfortable value, and does not require special stiffness dampers for different cabs, reducing the risk of improper matching and improving the overall reliability of the machine. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the present invention;

[0025] Figure 2 This is a schematic diagram of the vibration reduction system in this invention;

[0026] Figure 3 This is a schematic diagram of the shock absorber in this invention;

[0027] Figure 4 This is a schematic diagram of the electronic clutch actuator in this invention;

[0028] Figure 5 This is a control principle diagram of the present invention;

[0029] In the diagram: 1. Shock absorption system; 11. Shock absorber; 111. Connector; 112. Shock absorber body; 113. Shock absorber spring; 114. Air valve; 115. Air chamber; 12. Frame connecting plate; 13. End flange; 14. Bolt; 15. Nut; 16. Rubber pad; 17. Cab connecting plate; 2. Electronic clutch actuator; 21. Push rod; 22. Pressure sensor; 23. Piston; 24. Spring; 25. Coarse intake solenoid valve; 26. Fine intake solenoid valve; 27. Coarse exhaust solenoid valve; 28. Fine exhaust solenoid valve; 3. Air source; 4. Controller. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below. However, it should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of the invention.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention.

[0032] Example 1

[0033] like Figure 1 , Figure 2 and Figure 3 As shown, a road roller vibration reduction control system includes a vibration reduction system 1, an electronic clutch actuator 2, an air source 3, and a controller 4.

[0034] The shock absorption system 1 includes a shock absorber 11, which is equipped with an air nozzle 114 and an air chamber 115. The air nozzle 114 is connected to the air chamber 115, and the stiffness of the shock absorber 11 can be adjusted by adjusting the air pressure in the air chamber 115. In addition, the shock absorption system 1 can also be manually controlled by controlling the air pressure of the shock absorber 11 through buttons or by mechanical adjustment to change the stiffness of the shock absorber 11, thereby adjusting the vibration amplitude and vibration frequency of the cab.

[0035] The electronic clutch actuator 2 includes a pressure sensor 22, an exhaust solenoid valve, an intake solenoid valve, an intake channel, and an exhaust channel. Specifically, the exhaust solenoid valve includes a coarse exhaust solenoid valve 27 and a fine exhaust solenoid valve 28, and the intake solenoid valve includes a coarse intake solenoid valve 25 and a fine intake solenoid valve 26. The pressure sensor 22 is used to detect the pressure value in the air chamber 115. The intake channel is connected to the air source 3. The exhaust solenoid valve and the intake solenoid valve are respectively connected to the air nozzle 114 through air pipes. The pressure sensor 22, the exhaust solenoid valve, and the intake solenoid valve are respectively connected to the controller 4.

[0036] The controller 4 receives the detection signal from the pressure sensor 22 and transmits the feedback signal to the electronic clutch actuator 2. After receiving the feedback signal, the electronic clutch actuator 2 generates an action to control the air chamber 115 of the shock absorption system 1 to inflate and deflate, thereby realizing automatic shock absorption control.

[0037] As an improvement to the embodiment, such as Figure 2 As shown, the shock absorption system 1 also includes a frame connecting plate 12, an end flange 13, and a cab connecting plate 17;

[0038] The shock absorber 11 is mounted on the end flange 13. One end of the end flange 13 is connected and secured to the frame connecting plate 12 by bolts 14 and nuts 15, while the other end abuts against the shock absorber 11. The top of the shock absorber 11 is connected to the cab connecting plate 17, and a rubber pad 16 is installed between the shock absorber 11 and the cab connecting plate 17. The shock absorption system 1 of the present invention restricts the relative position of the frame connecting plate 12 and the cab connecting plate 17 by tightening the bolts 14. A wear-resistant tube is placed between the bolts 14 and the shock absorber 11. The outer ring of the tube is polished smooth to effectively protect the inner ring of the shock absorber from damage and allows it to slide freely up and down relative to the inner ring of the shock absorber 11. At the same time, it works with the shock absorber spring 113 to effectively improve the service life of the shock absorber 11.

[0039] In addition, the shock absorber 11 is arranged concentrically with the frame connecting plate 12, the cab connecting plate 17 and the end flange 13, which improves the installation stability of the overall structure and ensures stable working performance.

[0040] As a further improvement to the embodiment, the end flange 13 is welded together from two structural plates. One of the structural plates has several through holes for connecting the frame connecting plate 12, and the other plate is used to support the shock absorber 11. The cab connecting plate 17 has several through holes for connecting and fixing to the top of several shock absorbers 11.

[0041] As an improvement to the embodiment, such as Figure 3 As shown, the shock absorber 11 consists of a connecting body 111, a shock absorber 112, a shock absorber spring 113, and an air nozzle 114. The connecting body 111 and the shock absorber 112 are glued together tightly. The shock absorber spring 113 is embedded in the inner ring of the shock absorber 112, and the air nozzle 114 is embedded in the outer ring of the shock absorber 112, and is connected to the air chamber 115 inside the shock absorber 112. The connecting body 111 is made of metal, the shock absorber 112 is made of a rubber-like material with good elasticity, the shock absorber spring 113 is made of spring steel, and the air nozzle is a standard air nozzle; if a valve core is installed, it becomes a standard valve nozzle. The shock absorber spring 113, made of spring steel, protects the inner ring of the shock absorber 112 and improves its service life.

[0042] As an improvement to the embodiment, such as Figure 4 , Figure 5 As shown, the electronic clutch actuator 2 includes a cavity, on which the pressure sensor 22 is installed. The pressure sensor 22 detects the pressure value of the air chamber 115 inside the shock absorber 112. A push rod 21 is installed at one end of the cavity, and the push rod 21 is connected to the piston 23. A spring 24 is arranged on the front side of the piston 23. A coarse exhaust solenoid valve 27, a fine exhaust solenoid valve 28, a coarse intake solenoid valve 25, a fine intake solenoid valve 26, an intake channel, and an exhaust channel are installed at the other end of the cavity. The coarse exhaust solenoid valve 27, the fine exhaust solenoid valve 28, the coarse intake solenoid valve 25, and the fine intake solenoid valve 26 are respectively connected to the air nozzle 114 in the shock absorber 11 through pipelines.

[0043] When push rod 21 needs to move forward to push the load (the inflation process of air chamber 115), controller 4 controls the coarse intake solenoid valve 25 of electronic clutch actuator 2 through wiring harness, so that push rod 21 moves quickly to the vicinity of the target position. Then controller 4 controls fine intake solenoid valve 26 to precisely adjust the position of push rod 21. Electronic clutch actuator 2 is equipped with pressure sensor 22, which can accurately detect the pressure in air chamber 115 and feed back pressure signal to controller 4. Controller 4 controls the start and stop of push rod 21 to form closed-loop control.

[0044] Similarly, when push rod 21 needs to move backward (the air release process of air chamber 115), controller 4 controls coarse exhaust solenoid valve 27 to quickly exhaust air through wiring harness, so that push rod 21 quickly reaches the vicinity of the target position. Then controller 4 controls fine exhaust solenoid valve 28, thereby precisely controlling the start and stop of push rod 21. Pressure sensor 22 can constantly feed back the pressure signal in air chamber 115 to controller 4, and controller 4 controls the start and stop of push rod 21 to ensure precise control of air pressure in electronic clutch actuator 2, that is, precise control of air pressure in shock absorber 11, achieving the effect of automatic shock absorption control.

[0045] Example 2

[0046] A road roller equipped with the aforementioned vibration damping control system, wherein the specific steps for vibration damping control of the road roller are as follows:

[0047] 1) Pre-set the minimum pressure value and pressure range range of the pressure sensor 22;

[0048] When the power switch of the road roller is turned on, the controller 4 first receives the pressure value detected by the pressure sensor 22 of the electronic clutch actuator 2 and determines whether the set minimum pressure value a has been reached. If not, the controller 4 sends an action signal to the air intake solenoid valve of the electronic clutch actuator 2 to perform the air chamber 115 inflation action until the pressure in the air chamber 115 reaches the set target pressure value c, where c>a.

[0049] 2) If the set minimum pressure value a is met, the controller 4 continues to perform logical analysis on the interval amplitude values ​​(X1,…Xt) within the set time interval t seconds to determine whether all amplitude values ​​(X1,…Xt) are within the set amplitude range values ​​(a, b);

[0050] If so, controller 4 will not send an action signal to electronic clutch actuator 2;

[0051] If not, the controller 4 sends an action signal to the electronic clutch actuator 2, and the controller 4 controls the exhaust solenoid valve of the electronic clutch actuator 2 to perform an air release action until the maximum value b of the set amplitude range is reached. Then the controller 4 sends a stop action signal, where c>b>X>a.

[0052] 3) The controller 4 performs cyclic detection of the pressure of the electronic clutch actuator 2 to ensure that the entire system b>X>a.

[0053] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions or improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A vibration damping control system for a road roller, characterized in that, It includes a shock absorption system (1), an electronic clutch actuator (2), an air source (3), and a controller (4); The shock absorption system (1) includes a shock absorber (11), which is provided with an air nozzle (114) and an air chamber (115). The air nozzle (114) is connected to the air chamber (115). The electronic clutch actuator (2) includes a pressure sensor (22), an exhaust solenoid valve, an intake solenoid valve, an intake channel, and an exhaust channel. The pressure sensor (22) is used to detect the pressure value in the air chamber (115). The intake channel is connected to the air source (3). The exhaust solenoid valve and the intake solenoid valve are respectively connected to the air nozzle (114) through air pipes. The pressure sensor (22), the exhaust solenoid valve, and the intake solenoid valve are respectively connected to the controller (4). The controller (4) receives the detection signal from the pressure sensor (22) and transmits the feedback signal to the electronic clutch actuator (2). After receiving the feedback signal, the electronic clutch actuator (2) generates an action control system (1) to charge and de-charge the air chamber (115) of the damping system (1) to achieve automatic damping control. The vibration reduction control method of the road roller vibration reduction control system includes the following steps: 1) When the road roller is turned on, the controller (4) receives the signal from the pressure sensor (22) on the electronic clutch actuator (2) and determines whether the set minimum pressure value has been reached. If not, the controller (4) sends an action signal to the electronic clutch actuator (2), and the electronic clutch actuator (2) performs an air filling action on the air chamber (115) until the set target pressure value is reached. 2) After the minimum pressure value is met, the controller (4) performs logical analysis on the interval amplitude value within the set time interval and determines that all amplitude values ​​are within the set amplitude range. If so, the controller (4) does not send an action signal; otherwise, the controller (4) sends an action signal to the solenoid valve of the electronic clutch actuator (2). The electronic clutch actuator (2) performs the air release action of the air chamber (115) until the maximum value of the set amplitude range is reached, and then issues a stop action signal. 3) The controller (4) performs cyclic detection of the pressure of the electronic clutch actuator (2).

2. The vibration damping control system for a road roller according to claim 1, characterized in that, The shock absorption system (1) also includes a frame connecting plate (12), an end flange (13), and a cab connecting plate (17). The shock absorber (11) is installed between the frame connecting plate (12) and the cab connecting plate (17). The shock absorber (11) is fastened by bolts (14) and nuts (15). A rubber pad (16) is installed between the shock absorber (11) and the cab connecting plate (17).

3. The vibration damping control system for a road roller according to claim 2, characterized in that, The bolt (14) is fitted with a wear-resistant tube with a smooth outer ring.

4. A vibration damping control system for a road roller according to claim 2, characterized in that, The shock absorber (11) is arranged concentrically with the frame connecting plate (12), the cab connecting plate (17) and the end flange (13).

5. A vibration damping control system for a road roller according to claim 2, characterized in that, The end flange (13) is made of two structural plates welded together, one of which has several through holes.

6. A vibration damping control system for a road roller according to claim 1, characterized in that, The shock absorber (11) also includes a connector (111), a shock absorber (112), and a shock absorber spring (113). The shock-absorbing spring (113) is installed inside the shock absorber (112), the air nozzle (114) is installed on one side of the shock absorber (112), the air chamber (115) is installed inside the shock absorber (112), and the connecting body (111) is installed on the top of the shock absorber (112).

7. A vibration damping control system for a road roller according to claim 6, characterized in that, The connecting body (111) is made of metal; the shock absorber (112) is made of elastic material; and the shock absorber sheet (113) is made of spring steel.

8. A vibration damping control system for a road roller according to claim 1, characterized in that, The electronic clutch actuator (2) includes a cavity, on which the pressure sensor (22) is installed. A push rod (21) is installed at one end of the cavity. The push rod (21) is connected to a piston (23). A spring (24) is arranged on the front side of the piston (23). The exhaust solenoid valve, the intake solenoid valve, the intake channel, and the exhaust channel are installed at the other end of the cavity.

9. A vibration damping control system for a road roller according to claim 1, characterized in that, The inflation and deflation operations of the electronic clutch actuator (2) are specifically as follows: When the push rod (21) needs to move forward to push the load, the controller (4) controls the coarse intake solenoid valve (25) of the electronic clutch actuator (2) to make the push rod (21) approach the target position, and then controls the fine intake solenoid valve (26) to precisely adjust the position of the push rod (21). The pressure sensor (22) installed on the electronic clutch actuator (2) accurately detects and feeds back the signal, and the controller (4) controls the push rod (21) to start and stop, forming a closed-loop control. When the push rod (21) needs to move backward, the controller (4) controls the coarse exhaust solenoid valve (27) to exhaust, so that the push rod (21) approaches the target position, and then controls the fine exhaust solenoid valve (28) to precisely control the start and stop of the push rod (21). The pressure sensor (22) can provide feedback at all times and the controller (4) controls the start and stop of the push rod (21) to ensure precise control of the air pressure in the electronic clutch actuator (2), that is, to precisely control the air pressure in the air chamber (115) of the shock absorber (11).

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