Leveling device of asphalt paver and asphalt paver comprising same

Abstract

The invention discloses a leveling device of an asphalt paver and the asphalt paver comprising the leveling device. The leveling device comprises a vertical rod and a connecting frame, and a detection device is connected to the bottom end of the vertical rod; the detection device comprises an ultrasonic sensor and two detection parts, each detection part comprises a contact element and a signal recognizer, the contact element is arranged below the protruding part and used for being matched with a steel wire for positioning the asphalt pavement, and the signal recognizer is connected to the contact element and generates a signal when the steel wire makes contact with and presses the contact element. The leveling device is movably connected with the vertical rod through the connecting frame and can be used in cooperation with the paver after being adjusted, and it is guaranteed that in the deviation process of the paver, deviation in any direction can be detected. A contact element is arranged below the protruding part of the ultrasonic sensor, so that the steel wire can press the contact element when offset occurs. The signal sensor is connected to the contact element and matched with the contact element, and when the paver deviates and the steel wire extrudes the contact element, a signal is generated to remind a worker to adjust in time.

Description

Technical Field

[0001] The present invention relates to the technical field of road engineering, and in particular to a leveling device of an asphalt paver and an asphalt paver comprising the same. Background Art

[0002] An asphalt paver is a construction machine used to lay asphalt mixtures. Its main function is to lay asphalt mixtures in road construction. Modern asphalt pavers are usually equipped with advanced control systems, which make operation easier and improve construction efficiency and accuracy.

[0003] At present, in the process of asphalt paver paving roads, when paving on relatively rugged roads, in order to ensure the uniform thickness of the asphalt, a steel wire with a higher level is generally set to assist the ultrasonic sensor installed on the equipment to calibrate the level. However, in actual use, since the road surface on which the paver travels is relatively complex, the fuselage will shake to a certain extent, and the route of travel will be affected by human operation and will have a certain inclination. This will easily cause the ultrasonic sensor to scratch the steel wire used as a reference, causing the steel wire to deviate from its original position, thereby affecting the stability of the steel wire position and losing the accuracy of the reference, which has an extremely adverse effect on the levelness of the asphalt paving. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the defect in the prior art that the ultrasonic sensor of the asphalt paver scrapes the leveling reference object due to position offset and cannot effectively correct the position of the asphalt paver, and to provide a leveling device for an asphalt paver and an asphalt paver including the same.

[0005] The present invention solves the above technical problems through the following technical solutions:

[0006] Provided is a leveling device for an asphalt paver, comprising a vertical pole and a connecting frame, wherein the connecting frame is connected to the asphalt paver, the vertical pole is arranged vertically on the ground and is movably connected to the connecting frame, and the leveling device further comprises a detection device, wherein the detection device is connected to the bottom end of the vertical pole;

[0007] The detection device includes an ultrasonic sensor and two detection parts. The ultrasonic sensor has an opening facing the ground and protrusions located on both sides of the opening. The two detection parts are respectively connected to the two protrusions. Each of the detection parts includes a contact element and a signal identifier. The contact element is arranged below the protrusion and is used to cooperate with a steel wire for positioning the asphalt pavement. The signal identifier is connected to the contact element and generates a signal when the steel wire contacts and presses the contact element.

[0008] In this solution, the leveling device is movably connected to the vertical pole through a connecting frame, and can be adapted to the use of the paver after adjustment, ensuring that in the height direction, the steel wire can always be located below the protrusions on both sides of the ultrasonic sensor and between the two detection parts. The two detection parts are respectively arranged on the protrusions on both sides of the opening of the ultrasonic sensor. When working, the steel wire is located between the two detection parts, ensuring that the paver can be detected in any direction during the displacement process. A contact element is arranged under the protrusion of the ultrasonic sensor so that the steel wire can press the contact element when displacement occurs. The signal sensor is connected to the contact element and cooperates with the contact element. When the paver deviates and the steel wire presses the contact element, a signal is generated to remind the workers to make timely adjustments.

[0009] Preferably, the contact element has a contact surface matched with the steel wire, and the distance between the two contact surfaces on both sides of the opening is smaller than the distance between the inner walls of the two protrusions.

[0010] In this solution, the spacing between the contact elements is set to be smaller than the spacing between the inner walls of the ultrasonic sensor protrusions, so that when the paver is horizontally offset, the reference steel wire will preferentially contact the contact element rather than the inner wall of the ultrasonic sensor, ensuring that even if the steel wire vibrates slightly in the height direction, it will not scratch the inner wall of the ultrasonic sensor, thereby improving reliability. At the same time, it also avoids the situation where the paver deviates but the steel wire does not contact the contact element, resulting in the detection unit failing to detect the paver deviation.

[0011] Preferably, the detection part further comprises a sleeve frame and an elastic member, the sleeve frame is connected to the protruding portion, the contact element is movably connected to the sleeve frame along a horizontal direction; two ends of the elastic member abut against the contact element and the sleeve frame respectively.

[0012] In the present solution, the above arrangement allows the contact element to approach the sleeve frame in the horizontal direction when squeezed by the steel wire. Through the elastic parts that abut against the contact element and the sleeve frame at both ends, the contact element can automatically return to its original position after the worker adjusts the position of the asphalt paver without the need for manual adjustment.

[0013] Preferably, the detection part also includes a screw and a knob, the elastic member is a spring, one end of the screw passes through the sleeve frame, the spring and the contact element in sequence, the other end of the screw is threadedly connected to the knob, and the knob abuts against the outer side of the sleeve frame opposite to the spring.

[0014] In this solution, the screw rod passes through the sleeve frame and is connected to the contact element, which limits the moving direction of the contact element, and the screw rod connection is set to improve the stability of the leveling device; the elastic member is set as a spring, which is sleeved on the screw rod to determine the position of the elastic member in the detection part, and the structure is simple and the reset effect is good. Through the setting of the above-mentioned knob, the length of the screw rod between the contact element and the sleeve frame can be adjusted to change the spacing between the two ends of the elastic member to produce different reset forces. The position of the contact element can also be changed by adjusting the knob to set the acceptable horizontal offset range of the paver.

[0015] Preferably, the signal identifier comprises a photoelectric sensor and an insert, wherein the photoelectric sensor is arranged on the sleeve frame, the insert is connected to the contact element, and the insert is used to move horizontally with the contact element to be inserted into the sensing area of ​​the photoelectric sensor to generate a photoelectric signal.

[0016] In this solution, the signal identifier has a simple structure, is connected to the contact element with a plug, and can move synchronously with the contact element. The photoelectric sensor is set on the frame. When the contact element is squeezed and moved by the steel wire, the plug moves synchronously to the sensing area in the photoelectric sensor. The photoelectric signal generated is used to feedback the occurrence of offset.

[0017] Preferably, a limit bar is provided on the sleeve frame, the limit bar comprises a limit groove, and the photoelectric sensor is slidably connected to the limit bar in the limit groove via a connecting member.

[0018] In this solution, the photoelectric sensor can be moved on the frame through the limit bar. The relative position of the photoelectric sensor can be adjusted according to the distance between the contact element and the frame to ensure that when the contact element is squeezed, the insert will immediately move to the sensing area of ​​the photoelectric sensor to generate signal feedback, ensuring that the workers will know in time when the paver is offset and make adjustments.

[0019] Preferably, the signal identifier further comprises an audible and visual alarm, which is arranged on the leveling device and is electrically connected to the photoelectric sensor.

[0020] In this solution, an audible and visual alarm is set up to generate an audible and visual signal when it receives a signal from a photoelectric sensor, to remind workers to make timely adjustments. The sound feedback is set compared to the visual feedback, so that workers do not need to observe the paver all the time when it is working, and can make adjustments after hearing the alarm, which is convenient and practical.

[0021] Preferably, the detection portion is movably connected to the protrusion along the vertical direction.

[0022] In the present solution, the above arrangement facilitates workers to fine-tune the position of the detection part according to the height of the reference steel wire. After adjustment, the height of the steel wire is ensured to fall within the contact range of the contact element, so that the steel wire can horizontally squeeze the contact element after the paver is offset, thereby improving the reliability of the leveling device.

[0023] Preferably, a sliding arm is provided on a side of the protrusion away from the opening, a sliding groove is provided on the sliding arm along a side facing the protrusion, and the frame of the detection part is slidably connected to the sliding arm in the vertical direction in the sliding groove.

[0024] In this solution, a sliding arm is provided to adjust the height of the detection part. The frame of the detection part is slidably connected to the sliding arm and can slide in the vertical direction to the required height in the sliding groove. The sliding groove limits the moving direction of the detection part, making it move more smoothly in the height direction and reducing the impact of vibration during movement.

[0025] An asphalt paver is provided, comprising the leveling device of the asphalt paver mentioned above.

[0026] The positive and progressive effect of the present invention is that the leveling device is movably connected to the vertical pole through a connecting frame, and can be adapted for use with a paver after adjustment, ensuring that in the height direction, the steel wire can always be located below the protrusions on both sides of the ultrasonic sensor and between the two detection parts. The two detection parts are respectively arranged on the protrusions on both sides of the opening of the ultrasonic sensor. When working, the steel wire is located between the two detection parts, ensuring that the paver can be detected in any direction of displacement during the displacement process. A contact element is arranged under the protrusion of the ultrasonic sensor so that the steel wire can squeeze the contact element when displacement occurs. The signal sensor is connected to the contact element and cooperates with the contact element. When the paver deviates and the steel wire squeezes the contact element, a signal is generated to remind the worker to make timely adjustments. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of the leveling device of the paver in this embodiment;

[0028] Figure 2 Schematic diagram of the structure of the detection device in this embodiment;

[0029] Figure 3 Schematic diagram of the connection structure of the connecting frame in this embodiment;

[0030] Figure 4 FIG. 2 is a partial structural diagram of the connecting frame in this embodiment.

[0031] Description of reference numerals:

[0032] Pole 1

[0033] Connection frame 2

[0034] Detection device 3

[0035] Ultrasonic sensor 4

[0036] Protrusion 5

[0037] Detection unit 6

[0038] Contact element 7

[0039] Signal Identifier 8

[0040] Frame 9

[0041] Elastic member 10

[0042] Screw 11

[0043] Knob 12

[0044] Photoelectric sensor 13

[0045] Insert 14

[0046] Sound and light alarm 15

[0047] Limit strip 16

[0048] Limiting slot 17

[0049] Connector 18

[0050] Slide 19

[0051] Chute 20

[0052] Clamping assembly 21

[0053] Bolt 22

[0054] Clip structure 23

[0055] Vertical arm 24

[0056] Transfer arm 25

[0057] Mounting pad 26 DETAILED DESCRIPTION

[0058] The present invention is further described below by way of examples, but the present invention is not limited to the scope of the examples.

[0059] In this embodiment, a leveling device for an asphalt paver is provided, such as Figure 1-2As shown, the leveling device includes a pole 1 and a connecting frame 2, the connecting frame 2 is connected to the asphalt paver, the pole 1 is arranged vertically on the ground and is movably connected to the connecting frame 2, the leveling device also includes a detection device 3, the detection device 3 is connected to the bottom end of the pole 1; the detection device 3 includes an ultrasonic sensor 4 and two detection parts 6, the ultrasonic sensor 4 has an opening facing the ground and protrusions 5 located on both sides of the opening, the two detection parts 6 are respectively connected to the two protrusions 5, each detection part 6 includes a contact element 7 and a signal identifier 8, the contact element 7 is arranged below the protrusion 5, and is used to cooperate with the steel wire for positioning the asphalt pavement, the signal identifier 8 is connected to the contact element 7, and generates a signal when the steel wire contacts and presses the contact element 7.

[0060] The leveling device is connected to the asphalt paver through the upright pole 1 and the connecting frame 2, and is movably connected to the upright pole 1 through the connecting frame 2. After adjustment, it can be adapted to pavers of different heights. Two detection parts 6 are respectively arranged on the protrusions 5 on both sides of the opening of the ultrasonic sensor 4. When working, the steel wire is located between the two detection parts 6, ensuring that the paver can be detected in any direction of displacement during the displacement process. A contact element 7 is arranged under the protrusion 5 of the ultrasonic sensor 4, so that when displacement occurs, the steel wire can squeeze the contact element 7 instead of the ultrasonic sensor 4, avoiding scratching the inner wall of the ultrasonic sensor 4. The signal sensor is connected to the contact element 7 and cooperates with the contact element 7. When the paver deviates and the steel wire squeezes the contact element 7, a signal is generated to remind the worker to make timely adjustments, thereby ensuring the uniformity and levelness during the asphalt paving process.

[0061] Specifically, Figure 3 As shown, in this embodiment, a connection structure is provided on the connection frame 2, and the connection structure includes two clamping components, each clamping component 21 realizes the clamping function through a bolt 22, and the two clamping components 21 are connected by a clip structure 23. Figure 4 As shown, the connecting frame 2 also includes a vertical arm 24 and a transfer arm 25, and the angle of the asphalt paver can be adjusted through the transfer arm 25. The bolt 22 on the transfer arm 25 is connected with a mounting pad 26, and is connected to the asphalt paver through the mounting pad 26, thereby ensuring the stability of the connection.

[0062] Furthermore, the contact element has a contact surface that matches the steel wire, and the distance between the two contact surfaces on both sides of the opening is smaller than the distance between the inner walls of the two protrusions 5. The distance between the contact elements 7 is set to be smaller than the distance between the inner walls of the protrusions 5 of the ultrasonic sensor 4, so that when the paver is deflected to a certain extent, the reference steel wire will preferentially contact the contact element 7 rather than the inner wall of the ultrasonic sensor 4, thereby avoiding the steel wire scratching the inner wall of the ultrasonic sensor 4 during deflection, causing damage to the ultrasonic sensor 4. At the same time, it also avoids the situation where the paver deflects but the steel wire does not contact the contact element 7, resulting in the detection unit 6 not detecting the paver deflection.

[0063] Specifically, Figure 2 As shown, in this embodiment, the contact element is set as a roller, and the roller is vertically connected to the lower part of the protrusion 5. When the displacement occurs, the steel wire contacts the roller and generates rolling friction with the roller. The friction force is small, so the steel wire and the contact element 7 will not be damaged. In other embodiments, the contact element 7 can also be designed as other components, as long as it has a contact surface and can cooperate with the steel wire.

[0064] In this embodiment, the detection part 6 further includes a sleeve frame 9 and an elastic member 10. The sleeve frame 9 is connected to the protruding portion 5. The contact element 7 is movably connected to the sleeve frame 9 in the horizontal direction. The two ends of the elastic member 10 are respectively in contact with the contact element 7 and the sleeve frame 9. The detection part 6 further includes a screw rod 11 and a knob 12. The elastic member 10 is a spring. One end of the screw rod 11 passes through the sleeve frame 9 and the spring and is connected to the contact element 7 in sequence. The other end of the screw rod 11 is threadedly connected to the knob 12. The knob 12 is in contact with the outer side of the sleeve frame 9 opposite to the spring.

[0065] The above arrangement allows the contact element 7 to approach the sleeve 9 in the horizontal direction when it is squeezed by the steel wire. Through the elastic member 10 whose two ends abut against the contact element 7 and the sleeve 9, the worker can adjust the asphalt paver and the contact element 7 automatically returns to its original position without manual adjustment. The screw 11 passes through the sleeve 9 and is connected to the contact element 7, limiting the moving direction of the contact element 7; the elastic member 10 is set as a spring, which is sleeved on the screw 11, and determines the position of the elastic member 10 in the detection part 6. The structure is simple and the reset effect is good. Through the setting of the above knob 12, the length of the screw 11 between the contact element 7 and the sleeve 9 can be adjusted to change the spacing at the abutment points at both ends of the elastic member 10 to generate different reset forces. The position of the contact element 7 can also be changed by adjusting the knob 12 to set the acceptable horizontal offset range of the paver.

[0066] Specifically, before construction, the allowable deviation range of the paving machine is determined to determine the distance between the contact elements 7, and the length of the screw 11 between the contact element 7 and the sleeve frame 9 is changed by adjusting the knob 12 to adjust the two contact elements 7 to a suitable distance. In other embodiments, the screw 11 and the knob 12 can also be set to other structures, as long as the distance between the contact elements 7 can be adjusted.

[0067] In this embodiment, the signal identifier 8 includes a photoelectric sensor 13 and a plug 14. The photoelectric sensor 13 is arranged on the sleeve frame 9. The plug 14 is connected to the contact element 7. The plug 14 is used to move horizontally with the contact element 7 to be inserted into the sensing area of ​​the photoelectric sensor 13 to generate a photoelectric signal. The signal identifier 8 has a simple structure. It is connected to the contact element 7 with the plug 14 and can move synchronously with the contact element 7. The photoelectric sensor 13 is arranged on the sleeve frame 9. When the contact element 7 is squeezed and moved by the steel wire, the plug 14 moves synchronously to the sensing area of ​​the photoelectric sensor 13. The photoelectric signal generated is used to feedback the occurrence of the offset. In other embodiments, the signal identifier 8 can also use other accessories or structures, as long as it can generate a signal and feedback the signal.

[0068] Furthermore, a limit bar 16 is provided on the sleeve frame 9, and the limit bar 16 includes a limit groove 17, and the photoelectric sensor 13 is slidably connected to the limit bar 16 in the limit groove 17 through a connector 18. The photoelectric sensor 13 can be movably connected to the sleeve frame 9 through the limit bar 16, and the position of the photoelectric sensor 13 can be adjusted according to the distance between the contact element 7 and the sleeve frame 9, so as to ensure that when the contact element 7 is squeezed, the insert 14 immediately moves synchronously to the sensing area of ​​the photoelectric sensor 13 to generate signal feedback, so as to ensure that the worker can make adjustments after timely knowing the deviation of the paver.

[0069] Specifically, according to the adjusted position of the contact element 7, the position of the photoelectric sensor 13 is set by the limit bar 16, so that when the paver is offset, the insert 14 can immediately move to the sensing area of ​​the photoelectric sensor 13 to generate a signal. In other embodiments, the limit bar 16 can also be set to other structures, as long as the photoelectric sensor 13 can be movably connected to the sleeve frame 9.

[0070] The signal identifier 8 further includes an audible and visual alarm 15, which is arranged on the leveling device and is electrically connected to the photoelectric sensor 13. By setting the audible and visual alarm 15, when the audible and visual alarm 15 receives a signal from the photoelectric sensor 13, an audible and visual signal is generated to remind the worker to make adjustments in time, and the setting of sound feedback is different from visual feedback, so that the worker does not need to observe the paver all the time when it is working, and can make adjustments after hearing the alarm, which is convenient and practical.

[0071] In this embodiment, the detection part 6 is movably connected to the protrusion 5 in the vertical direction. The above arrangement facilitates workers to adjust the position of the detection part 6 according to the height of the reference wire, and after adjustment, the height of the wire is ensured to fall within the contact range of the contact element 7, so that after the paver is offset, the wire can horizontally press the contact element 7 to avoid scratching the inner wall of the ultrasonic sensor 4.

[0072] Specifically, by providing a sliding arm 19 on the side away from the opening, the detection part 6 is movably connected to the protrusion 5 in the vertical direction. A sliding groove 20 is provided on the side of the arm facing the protrusion 5. The frame of the detection part 6 is slidably connected to the sliding arm 19 in the vertical direction in the sliding groove 20. The sliding arm 19 can be used to adjust the height of the detection part 6. The frame of the detection part 6 is slidably connected to the sliding arm 19 and can slide in the vertical direction to the required height in the sliding groove 20. The sliding groove 20 limits the moving direction of the detection part 6, making it move more smoothly in the height direction and reducing the vibration effect during movement. In other embodiments, it can also be set to other structures, as long as the detection part 6 can adjust the height according to the position of the steel wire.

[0073] In this embodiment, an asphalt paver is also provided, including the above-mentioned leveling device. The leveling device is connected to the asphalt paver through the upright pole 1 and the connecting frame 2, and is movably connected to the upright pole 1 through the connecting frame 2. After adjustment, it can be adapted to be used on pavers of different heights. Two detection parts 6 are respectively arranged on the protrusions 5 on both sides of the opening of the ultrasonic sensor 4. When working, the steel wire is located between the two detection parts 6, ensuring that the paver can be detected in any direction of displacement during the displacement process. A contact element 7 is arranged below the protrusion 5 of the ultrasonic sensor 4, so that when displacement occurs, the steel wire can press the contact element 7 instead of the ultrasonic sensor 4, avoiding scratching the inner wall of the ultrasonic sensor 4. The signal sensor is connected to the contact element 7 and cooperates with the contact element 7. When the paver deviates and the steel wire presses the contact element 7, a signal is generated to remind the worker to make timely adjustments, thereby ensuring the uniformity and levelness during the asphalt paving process.

[0074] Although the specific embodiments of the present invention are described above, it should be understood by those skilled in the art that this is only for illustration and the protection scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A leveling device for an asphalt paver, comprising a vertical pole and a connecting frame, wherein the connecting frame is connected to the asphalt paver, characterized in that: The vertical pole is arranged vertically on the ground and is movably connected to the connecting frame. The leveling device further comprises a detection device, which is connected to the bottom end of the vertical pole; The detection device includes an ultrasonic sensor and two detection parts. The ultrasonic sensor has an opening facing the ground and protrusions located on both sides of the opening. The two detection parts are respectively connected to the two protrusions. Each of the detection parts includes a contact element and a signal identifier. The contact element is arranged below the protrusion and is used to cooperate with a steel wire for positioning the asphalt pavement. The signal identifier is connected to the contact element and generates a signal when the steel wire contacts and presses the contact element.

2. The leveling device for an asphalt paver according to claim 1, characterized in that: The contact element has a contact surface matched with the steel wire, and the distance between the two contact surfaces on both sides of the opening is smaller than the distance between the inner walls of the two protrusions.

3. The leveling device of the asphalt paver according to claim 1, characterized in that: The detection part further comprises a sleeve frame and an elastic member, wherein the sleeve frame is connected to the protruding portion, and the contact element is movably connected to the sleeve frame along a horizontal direction; two ends of the elastic member are respectively in contact with the contact element and the sleeve frame.

4. The leveling device for an asphalt paver according to claim 3, characterized in that: The detection part also includes a screw and a knob, the elastic member is a spring, one end of the screw passes through the sleeve frame, the spring and the contact element in sequence, the other end of the screw is threadedly connected to the knob, and the knob abuts against the outer side of the sleeve frame opposite to the spring.

5. The leveling device for an asphalt paver according to claim 3, characterized in that: The signal identifier includes a photoelectric sensor and an insert. The photoelectric sensor is arranged on the sleeve frame. The insert is connected to the contact element. The insert is used to move horizontally with the contact element to be inserted into the sensing area of ​​the photoelectric sensor to generate a photoelectric signal.

6. The leveling device for an asphalt paver according to claim 5, characterized in that: The sleeve frame is provided with a limit bar, the limit bar comprises a limit groove, and the photoelectric sensor is slidably connected with the limit bar in the limit groove via a connecting piece.

7. The leveling device for an asphalt paver according to claim 5, characterized in that: The signal identifier also includes an audible and visual alarm, which is arranged on the leveling device and is electrically connected to the photoelectric sensor.

8. The leveling device for an asphalt paver according to claim 1, characterized in that: The detection portion is movably connected to the protruding portion along a vertical direction.

9. The leveling device for an asphalt paver according to claim 8, characterized in that: A sliding arm is arranged on a side of the protrusion away from the opening, a sliding groove is arranged on a side of the sliding arm facing the protrusion, and the frame of the detection part is slidably connected with the sliding arm in a vertical direction in the sliding groove.

10. An asphalt paver, characterized in that: A leveling device for an asphalt paver comprising the device described in any one of claims 1 to 9.

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