Safety control device of milling machine

Abstract

The utility model discloses a safety control device of a milling machine, which relates to the technical field of milling machinery and comprises a controller, a steering oil cylinder connected with two front tires of the milling machine and position sensors respectively arranged on two rear tires of the milling machine, the position sensor, the walking motor and the oil cylinder magnetic telescopic sensor are all electrically connected with the controller, the position state of the rear supporting leg is detected through the position sensor, the steering angle of the front wheel is detected through the oil cylinder magnetic telescopic sensor, and the controller controls the walking motor according to the steering angle of the front wheel. Therefore, the walking speed of the whole vehicle is controlled, and the steering operation safety of equipment is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of milling machinery, in particular to a safety control device for a milling machine. Background Art

[0002] Milling machines are pavement maintenance equipment and are widely used in large-scale removal and stripping of surface defects on various grades of asphalt pavements on highways and municipal transportation, airport runways and port terminals, as well as roughening of cement pavements. They are large-scale pavement maintenance equipment that is indispensable in modern mature pavement maintenance construction technology.

[0003] Small or medium wheel milling machines usually need to perform edge milling during operation. When the equipment is in the edge milling process, the right rear tire will rotate to the inside of the vehicle body. At this time, the center of gravity of the vehicle will change. When the road surface is not smooth or sloped, the stability of the vehicle body will be reduced. At this time, if the machine moves quickly, there will be a risk of excessive tilt or rollover. Utility Model Content

[0004] In order to overcome the defect in the prior art that the milling machine moves fast along the edge causing the vehicle body to tilt excessively or roll over, the utility model provides a safety control device for the milling machine to control the travel speed of the whole vehicle, thereby improving the operating safety of the equipment.

[0005] The technical solution adopted by the utility model to solve its technical problems is: a safety control device for a milling machine, comprising a controller, a steering cylinder connected to two front tires of the milling machine, and position sensors respectively arranged on two rear tires of the milling machine, each rear tire is provided with a travel motor, the steering cylinder is provided with a cylinder magnetic telescopic sensor, and the position sensor, the travel motor and the cylinder magnetic telescopic sensor are all electrically connected to the controller.

[0006] As a further improvement of the utility model, a frame is provided at the rear end of the milling machine, and each rear tire is provided with a rear support leg which is mutually referenced with the frame.

[0007] As a further improvement of the utility model, the rear legs are connected to the rear tires via a hinged structure.

[0008] As a further improvement of the utility model, each front tire is provided with an angle detection sensor, and the angle detection sensor is electrically connected to the controller.

[0009] As a further improvement of the utility model, a walking speed sensor is provided on the walking motor, and the walking speed sensor is electrically connected to the controller.

[0010] As a further improvement of the present utility model, the position sensor is a proximity sensor.

[0011] Compared with the prior art, the utility model has the following beneficial effects: in this solution, the position state of the rear outrigger is detected by the position sensor, the steering angle of the front wheel is detected by the cylinder magnetic telescopic sensor, and the controller controls the travel motor according to the steering angle of the front wheel, thereby achieving control of the travel speed of the entire vehicle, thereby improving the safety of equipment operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0013] Figure 1 The utility model is a schematic structural diagram of a safety control device for a milling machine.

[0014] Figure 2 It is a structural schematic diagram of the front tire connection of the utility model.

[0015] In the figure: 1. rear outrigger; 2. rear tire; 3. travel motor; 3.1. travel speed sensor; 4. front tire; 5. steering cylinder; 5.1. cylinder magnetic telescopic sensor; 6. controller; 7. position sensor; 8. frame; 9. milling machine. DETAILED DESCRIPTION

[0016] In order to make the technical solution and beneficial effects of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0017] Reference Figure 1 and Figure 2 The utility model embodiment discloses a safety control device for a milling machine, including a controller 6, a steering cylinder 5 connected to the two front tires of the milling machine 9, and position sensors 7 respectively arranged on the two rear tires 2 of the milling machine 9, each rear tire 2 is provided with a travel motor 3, the steering cylinder 5 is provided with a cylinder magnetic telescopic sensor 5.1, and the position sensor 7, the travel motor 3 and the cylinder magnetic telescopic sensor 5.1 are all electrically connected to the controller 6.

[0018] Each front tire 4 is provided with an angle detection sensor, which is electrically connected to the controller 6. The angle detection sensor is compared with the angle calculated by the controller to ensure accuracy within a certain error and ensure driving safety.

[0019] The walking motor 3 is provided with a walking speed sensor 3.1, which is electrically connected to the controller 6. The walking speed sensor 3.1 can monitor the walking speed in real time.

[0020] The rear end of the milling machine 9 is provided with a frame 8, and each rear tire 2 is provided with a rear leg 1 which is mutually referenced with the frame 8. The rear leg 1 is connected to the rear tire 2 through a hinge structure. The position sensor 7 is a proximity sensor. The position sensor 7 is installed at the hinged connection position between the frame 8 and the rear leg 1. When the rear leg 1 is located outside the frame (8), the position sensor 7 triggers an output signal; when the rear leg 1 is located inside the frame (8), the position sensor 7 has no output signal, which is used to feedback the position state of the right rear leg 1.

[0021] The controller 6 can calculate the steering angle value of the front tire 4 through the signal change value of the oil cylinder magnetic expansion sensor 5.1; the controller 6 controls the travel motor 3 according to the steering angle value of the front tire and the relationship between the following table, so as to realize the control of the maximum travel speed of the milling machine 9 (for example, if a=30°, according to the set program, the fastest travel speed is limited to 20m / min);

[0022] The front wheel steering angle and the corresponding maximum travel speed in the edge-adjacent operation state are shown in the following table:

[0023]

[0024] The numerical values ​​described in the table are only the best examples and the specific values ​​are not limited.

[0025] It should be understood that the specific embodiments described herein are only used to understand the present invention and are not used to limit the present invention. All other embodiments obtained by those skilled in the art without making any creative work are within the scope of protection of the present invention.

Claims

1. A safety control device for a milling machine, characterized in that: The invention comprises a controller (6), a steering cylinder (5) connected to two front tires of a milling machine (9), and position sensors (7) respectively arranged on two rear tires (2) of the milling machine (9), each rear tire (2) being provided with a travel motor (3), a cylinder magnetic telescopic sensor (5.1) being provided on the steering cylinder (5), and the position sensor (7), the travel motor (3) and the cylinder magnetic telescopic sensor (5.1) being electrically connected to the controller (6).

2. A milling machine safety control device according to claim 1, characterized in that: A frame (8) is provided at the rear end of the milling machine (9), and each rear tire (2) is provided with a rear support leg (1) which is mutually referenced with the frame (8).

3. A milling machine safety control device according to claim 2, characterized in that: The rear supporting leg (1) is connected to the rear tire (2) via a hinge structure.

4. A milling machine safety control device according to claim 3, characterized in that: Each front tire (4) is provided with an angle detection sensor, and the angle detection sensor is electrically connected to the controller (6).

5. A milling machine safety control device according to claim 4, characterized in that: A walking speed sensor (3.1) is provided on the walking motor (3), and the walking speed sensor (3.1) is electrically connected to the controller (6).

6. A milling machine safety control device according to claim 5, characterized in that: The position sensor (7) is a proximity sensor.

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