A reliability testing device for steel wheels of road rollers

Abstract

The present invention relates to a reliability testing device for a steel wheel of a road roller, which is applied to the technical field of road construction machinery detection. The device comprises a chassis, a movable rail, a test bench, a connecting shaft, a steel wheel, a vibration sensor, a movable groove, a convex module, a triangular piece, a compression cylinder, an electric cylinder and a random selection module. The present invention drives the steel wheel to simulate rolling on the chassis through the test bench, and uses the vibration sensor to monitor the vibration of the steel wheel. The random selection module controls the electric cylinder to limit the activity of the triangular piece, thereby realizing the randomization of the triangular piece ejection action. The ejected triangular piece simulates the pressing of hard stones on the road surface. The introduction of randomness makes the test process closer to the real construction environment, thereby effectively improving the authenticity of the steel wheel simulating road construction, not only providing data support for the reliability test of the steel wheel, but also effectively improving the accuracy of the steel wheel vibration reliability test.

Description

Technical Field

[0001] The invention relates to a reliability testing device, in particular to a reliability testing device for a steel wheel of a road roller, which is applied in the technical field of road construction machinery detection. Background Art

[0002] The road roller is an important road construction machine, and the steel wheel is its operating device. The steel wheel acts on the compressed material at a certain frequency and amplitude to continuously improve its compaction. As the core component of the road roller, the vibration performance of the steel wheel needs to be tested during the research and development and design process.

[0003] The specification of Chinese invention patent CN201310616626.0 discloses "A testing device for steel wheels of road rollers", which provides a device dedicated to reliability testing of steel wheels of road rollers. It can complete the test evaluation of steel wheels before testing the whole machine, and has the advantages of shortening the R&D cycle, good operating environment and low labor intensity.

[0004] The existing steel wheel testing methods and the above-mentioned steel wheel testing methods mostly use a method of simulating the actual construction of the steel wheel for testing. However, there is a lack of random scene control during the steel wheel testing process. Therefore, the test data obtained cannot fully support the test results of the steel wheel, affecting the authenticity of the steel wheel test results. Summary of the invention

[0005] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is that the existing steel wheel testing process lacks random scene control, so the obtained test data cannot fully support the test results of the steel wheel, affecting the authenticity of the steel wheel test results.

[0006] In order to solve the above problems, the present invention provides a reliability testing device for a steel wheel of a road roller, comprising a chassis, both left and right ends of the chassis are fixedly connected with movable rails, the movable ends of the movable rails are fixedly connected with a test bench, a connecting shaft is movably connected in the middle of the two test benches, a steel wheel is rotatably connected between the two connecting shafts, the steel wheel is rollingly connected to the chassis, the outer end of the connecting shaft is fixedly connected with a detection frame, the middle part of the detection frame is fixedly connected with a vibration sensor, and the sensing end of the vibration sensor is in contact with the steel wheel;

[0007] The middle part of the chassis is evenly and fixedly connected with movable grooves, and the inside of the movable groove is slidably connected with a top convex module, which is composed of a plurality of hinged triangular parts. Both ends of the movable groove are fixedly connected with a compression cylinder, and the output end of the compression cylinder is fixedly connected to the top convex module. The bottom of the movable groove is slidably connected with an electric cylinder, and the output end of the electric cylinder is fixedly connected to the triangular part, and the control end of the electric cylinder is connected to a random selection module.

[0008] In the above-mentioned reliability testing device for the steel wheel of a road roller, the steel wheel is simulated to roll on the chassis, and the random selection module is used to control the random ejection of the convex module, so as to further improve the authenticity of the steel wheel pavement construction, and then the vibration sensor is used to monitor the vibration of the steel wheel, thereby effectively improving the accuracy of the steel wheel vibration reliability test.

[0009] As a further improvement of the present application, the bottom of the test bench is movably connected with a telescopic slide rail, and the telescopic slide rail is fixedly connected to the movable end of the movable rail to realize the telescopic sliding of the test bench, facilitate the installation of the steel wheel between the two test benches, and adapt to steel wheels of different lengths.

[0010] As a further improvement of the present application, the movement direction of the telescopic slide rail is parallel to the central axis of the detection frame, and the facing ends of the two detection frames are respectively fixedly connected with a plug-in rod and a plug-in hole, and the plug-in rod and the plug-in hole are plug-in corresponding to each other. By plugging the plug-in rod and the plug-in hole, the docking stability of the two detection frames is effectively improved, thereby effectively improving the detection accuracy of the vibration sensor on the detection frame.

[0011] As a further improvement of the present application, the outer end of the connecting shaft is fixedly connected to a hydraulic frame, a hydraulic cylinder is fixedly connected between the hydraulic frame and the test bench, and the hydraulic frame is fixedly connected to the detection frame. The hydraulic cylinder is used to apply downward pressure to the hydraulic frame, thereby increasing the compaction capacity of the steel wheel installed on the connecting shaft, simulating the hydraulic method of the road roller on the steel wheel, and effectively improving the accuracy of the steel wheel reliability performance test.

[0012] As another improvement of the present application, a panel is fixedly connected to the top of the chassis, and windows are arranged in a matrix on the surface of the panel. The top of the triangular piece corresponds to the window. The panel is used to cover and protect the chassis, and the triangular piece extends from the window to simulate the hard stone objects that the steel wheel contacts during the road pressing process.

[0013] As another improvement supplement of the present application, a protective film is fixedly connected to the inside of the window, a perforation is opened in the middle of the protective film, the top of the triangular piece is connected to the perforation, and the window is closed by the protective film, which effectively prevents external debris from falling into the chassis.

[0014] As another improved supplement of the present application, a mushroom head is fixedly connected to the top end of the triangular piece, and the through hole is sleeved with the handle end of the mushroom head. The handle end of the mushroom head is sleeved with the through hole, which effectively improves the connection stability between the protective film and the triangular piece.

[0015] As another improvement of the present application, the left and right ends of the protective film are folded in a wave shape, the folding direction of the protective film corresponds to the sliding direction of the electric cylinder, and the protective film is made of elastic rubber material. According to the moving direction of the triangle piece, the protective film unfolds the folded ends in the corresponding direction, thereby effectively preventing the protective film from being torn.

[0016] As another improvement supplement of the present application, an elastic rib is fixedly connected between the perforation and the window. The axial direction of the elastic rib corresponds to the sliding direction of the electric cylinder, and the elastic rib is bent in a downward arc. The elastic rib is made of spring steel material. The elastic rib is utilized to improve the folding and recovery effect of the protective film. At the same time, the elastic force of the elastic rib is utilized to facilitate the recovery of the horizontal position of the electric cylinder.

[0017] As another improvement supplement of the present application, a connecting wire is fixedly connected between the middle part of the elastic rib and the bottom of the folded end of the protective film. The connecting wire is made of tensile fiber material. During the folding process of the protective film, the elastic rib bends downward more sharply, and the protective film is pulled down by the connecting wire, thereby preventing the protective film from being folded and exposed, preventing the steel wheel from crushing the exposed protective film, and effectively preventing the protective film from being crushed and damaged.

[0018] To summarize, the present invention drives the steel wheel to simulate rolling on the chassis through the test bench, uses the vibration sensor to monitor the vibration of the steel wheel, and obtains the data for verifying the vibration performance of the steel wheel. Then, the random selection module controls the electric cylinder to limit the movement of the triangular part. Only when the electric cylinder extends, the triangular part located at the top of the electric cylinder can be ejected, thereby realizing the randomization of the triangular part ejection action. Then, after the compression cylinder applies horizontal pressure to the ejection module, the triangular part is randomly ejected, and the ejected triangular part simulates the pressing of hard stones on the road surface. The introduction of randomness makes the test process closer to the real construction environment, thereby effectively improving the authenticity of the steel wheel simulating road construction, which not only provides data support for the reliability test of the steel wheel, but also effectively improves the accuracy of the steel wheel vibration reliability test. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a three-dimensional structural diagram of the first embodiment of the present application;

[0020] Figure 2 This is a three-dimensional structural diagram of a test bench according to the first embodiment of the present application;

[0021] Figure 3 This is a three-dimensional structural diagram of the detection frame of the first embodiment of the present application;

[0022] Figure 4 This is a three-dimensional structural diagram of the movable groove and the top protrusion module of the first embodiment of the present application;

[0023] Figure 5 This is a three-dimensional structural diagram of the top protrusion module of the first embodiment of the present application;

[0024] Figure 6 This is a side cross-sectional view of a top protrusion module according to the first embodiment of the present application;

[0025] Figure 7This is a side cross-sectional view of a triangle member according to the first embodiment of the present application;

[0026] Figure 8 This is a demonstration diagram of the rising movement of the triangle member in the first embodiment of the present application;

[0027] Fig. 9 This is a three-dimensional structural diagram of a triangle piece and a protective film according to a second embodiment of the present application;

[0028] Fig.10 This is a demonstration diagram of the horizontal movement of the triangle member in the second embodiment of the present application.

[0029] Description of the numbers in the figure:

[0030] 1. Chassis; 101. Moving rail; 102. Test bench; 103. Connecting shaft; 104. Inspection frame; 105. Vibration sensor; 106. Movable slot; 107. Telescopic slide rail; 108. Plug rod; 109. Plug hole; 110. Hydraulic frame; 111. Hydraulic cylinder; 2. Steel wheel; 3. Top convex module; 301. Triangle piece; 302. Compression cylinder; 303. Electric cylinder; 304. Random selection module; 4. Panel; 401. Window; 402. Protective film; 403. Perforation; 404. Mushroom head; 405. Elastic rib; 406. Connecting wire. DETAILED DESCRIPTION

[0031] Two implementation modes of the present application are described in detail below with reference to the accompanying drawings.

[0032] The first implementation method:

[0033] Figure 1-3The figure shows a reliability test device for a steel wheel of a road roller, comprising a chassis 1, a movable rail 101 is fixedly connected to both left and right ends of the chassis, a test bench 102 is fixedly connected to the movable end of the movable rail 101, a connecting shaft 103 is movably connected to the middle of the two test benches 102, a steel wheel 2 is rotatably connected between the two connecting shafts, the steel wheel 2 is rollingly connected to the chassis 1, a detection frame 104 is fixedly connected to the outer end of the connecting shaft 103, a vibration sensor 105 is fixedly connected to the middle of the detection frame 104, the sensing end of the vibration sensor 105 is in contact with the steel wheel 2, a telescopic slide rail 107 is movably connected to the bottom of the test bench 102, and the telescopic slide rail 1 07 is fixedly connected with the movable end of the movable rail 101 to realize the telescopic sliding of the test bench 102, so as to facilitate the installation of the steel wheel 2 between the two test benches 102 and adapt to steel wheels 2 of different lengths. The movement direction of the telescopic slide rail 107 is parallel to the central axis direction of the detection frame 104. The two detection frames 104 are respectively fixedly connected with a plug rod 108 and a plug hole 109 at the ends facing each other. The plug rod 108 and the plug hole 109 are plugged in and correspond to each other. The plugging of the plug rod 108 and the plug hole 109 effectively improves the docking stability of the two detection frames 104, thereby effectively improving the detection accuracy of the vibration sensor 105 on the detection frame 104.

[0034] When conducting a reliability test on the steel wheel 2 of the road roller, the steel wheel 3 is placed on the chassis 1, and the two test benches 102 are moved toward each other via the telescopic slide rails 107, driving the connecting shaft 103 to be plugged into the two ends of the steel wheel 2 to achieve rolling installation of the steel wheel 2. The two detection frames 104 are connected to the plug-in holes 109 via the plug-in rods 108, and then the steel wheel 2 is driven by the test bench 102 to simulate rolling on the chassis 1, and the vibration sensor 105 is used to monitor the vibration of the steel wheel 2.

[0035] Figure 2 As shown, the outer end of the connecting shaft 103 is fixedly connected to a hydraulic frame 110, a hydraulic cylinder 111 is fixedly connected between the hydraulic frame 110 and the test bench 102, and the hydraulic frame 110 is fixedly connected to the detection frame 104, and the hydraulic cylinder 111 is used to apply downward pressure to the hydraulic frame 110, thereby increasing the compaction capacity of the steel wheel 2 installed on the connecting shaft 103, simulating the hydraulic method of the road roller on the steel wheel 2, and effectively improving the reliability performance test accuracy of the steel wheel 2;

[0036] When the steel wheel 2 rolls on the chassis 1, the hydraulic cylinder 111 applies downward pressure to the oil pressure frame 110, thereby enhancing the pressure of the steel wheel 2 during rolling through the connecting shaft 103, simulating the oil pressure of the steel wheel 2 by the roller, and obtaining different vibration data by adjusting the pressure of the steel wheel 2, thereby effectively improving the accuracy of the reliability performance test of the steel wheel 2.

[0037] Figure 1-8As shown, the middle part of the chassis 1 is equidistantly and fixedly connected with movable grooves 106, the interior of the movable grooves 106 is slidably connected with a convex module 3, the convex module 3 is hingedly formed by a plurality of triangular pieces 301, both ends of the movable grooves 106 are fixedly connected with compression cylinders 302, the output end of the compression cylinder 302 is fixedly connected with the convex module 3, the bottom of the movable groove 106 is slidably connected with an electric cylinder 303, the output end of the electric cylinder 303 is fixedly connected with the triangular piece 301, and the control end of the electric cylinder 303 is connected with a random selection module 304;

[0038] The electric cylinder 303 is randomly controlled to extend through the random selection module 304. After the compression cylinder 302 applies horizontal pressure to the protruding module 3, the hinged feet at both ends of the bottom of the designated triangle 301 are closed to realize the outward ejection of the triangle 301. The ejected triangle 301 simulates the pressing of hard objects such as stones on the road surface. The steel wheel 2 rolls over the protruding triangle 301, and the vibration of the steel wheel 2 is affected by the resistance triangle 301, which effectively improves the authenticity of the steel wheel 2 simulating the road construction, and provides data support for the reliability test of the steel wheel 2, thereby effectively improving the accuracy of the vibration reliability test of the steel wheel 2.

[0039] The second implementation method:

[0040] Compared with the first embodiment, this embodiment mainly adds a panel 4 and a protective film 402. The specific newly added structures are as follows, and the remaining structures are consistent with the first embodiment.

[0041] Figure 4 and Figure 7-9 As shown, a panel 4 is fixedly connected to the top of the chassis 1, and windows 401 are arranged in a matrix on the surface of the panel 4. The top of the triangular piece 301 corresponds to the window 401, and the panel 4 is used to cover and protect the chassis 1. The triangular piece 301 extends out of the window 401 to simulate the hard stone objects that the steel wheel 2 contacts during the road pressing process. A protective film 402 is fixedly connected to the inside of the window 401, and a through hole 403 is opened in the middle of the protective film 402. The top of the triangular piece 301 is sleeved with the through hole 403, and the window 401 is closed by the protective film 402, which effectively prevents foreign debris from falling into the chassis 1. A mushroom head 404 is fixedly connected to the top of the triangular piece 301, and the through hole 403 is sleeved with the handle end of the mushroom head 404. The handle end of the mushroom head 404 is sleeved with the through hole 403, which effectively improves the connection stability between the protective film 402 and the triangular piece 301.

[0042] When testing the steel wheel 2, the ejected triangular piece 301 extends out from the window 401 on the panel 4, and the panel 4 is used to cover and protect the chassis 1. The protective film 402 closes the window 401, effectively preventing foreign debris from falling into the chassis 1, thereby effectively improving the working stability of the ejection module 3.

[0043] Figure 9-10 As shown, both left and right ends of the protective film 402 are folded in a wave shape, the folding direction of the protective film 402 corresponds to the sliding direction of the electric cylinder 303, and the protective film 402 is made of elastic rubber material. According to the moving direction of the triangular piece 301, the protective film 402 unfolds the folded end in the corresponding direction, thereby effectively preventing the protective film 402 from being torn. An elastic rib 405 is fixedly connected between the perforation 403 and the window 401, the axial direction of the elastic rib 405 corresponds to the sliding direction of the electric cylinder 303, and the elastic rib 405 is bent in a downward arc shape. The elastic rib 405 is made of spring steel material. 05 Improve the folding recovery effect of the protective film 402, and use the elastic force of the elastic rib 405 to facilitate the recovery of the horizontal position of the electric cylinder 303. A connecting wire 406 is fixedly connected between the middle of the elastic rib 405 and the bottom of the folded end of the protective film 402. The connecting wire 406 is made of a tensile fiber material. During the folding process of the protective film 402, the elastic rib 405 bends downward more sharply, and the connecting wire 406 is used to pull the protective film 402 down, thereby preventing the protective film 402 from being folded and exposed, preventing the steel wheel 2 from rolling over the exposed protective film 402, and effectively preventing the protective film 402 from being rolled over and damaged;

[0044] During the horizontal movement of the top convex module 3, a horizontal pulling force is applied to the protective film 402, and the protective film 402 unfolds the folded end in the corresponding direction, thereby effectively preventing the protective film 402 from being torn. During the folding process of the protective film 402, the elastic ribs 405 are bent downward under pressure, and at the same time, the connecting wire 406 is used to pull the protective film 402 down, thereby preventing the protective film 402 from folding and exposing the protective film 402, preventing the steel wheel 2 from crushing the exposed protective film 402, and effectively preventing the protective film 402 from being crushed and damaged.

[0045] In view of current practical needs, the above-mentioned implementation mode adopted in this application is not limited to the scope of protection. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the scope of protection of the present invention.

Claims

1. A reliability testing device for a steel wheel of a road roller, characterized in that: The invention comprises a chassis (1), wherein both left and right ends of the chassis are fixedly connected to movable rails (101), the movable ends of the movable rails (101) are fixedly connected to test benches (102), the middle parts of the two test benches (102) are movably connected to connecting shafts (103), a steel wheel (2) is rotatably connected between the two connecting shafts, the steel wheel (2) is rollingly connected to the chassis (1), the outer ends of the connecting shafts (103) are fixedly connected to a detection frame (104), the middle part of the detection frame (104) is fixedly connected to a vibration sensor (105), and the sensing end of the vibration sensor (105) is in contact with the steel wheel (2); The middle part of the chassis (1) is connected to movable grooves (106) in an equidistant and fixed arrangement, and the interior of the movable groove (106) is slidably connected to a convex module (3), and the convex module (3) is composed of a plurality of triangular pieces (301) hingedly connected. Both ends of the movable groove (106) are fixedly connected to a compression cylinder (302), and the output end of the compression cylinder (302) is fixedly connected to the convex module (3). The bottom of the movable groove (106) is slidably connected to an electric cylinder (303), and the output end of the electric cylinder (303) is fixedly connected to the triangular piece (301), and the control end of the electric cylinder (303) is connected to a random selection module (304); The bottom of the test bench (102) is movably connected to a telescopic slide rail (107), the telescopic slide rail (107) is fixedly connected to the movable end of the movable rail (101), the movement direction of the telescopic slide rail (107) is parallel to the direction of the central axis of the detection frame (104), the ends of the two detection frames (104) facing each other are respectively fixedly connected to a plug rod (108) and a plug hole (109), the plug rod (108) and the plug hole (109) are plugged correspondingly, the outer end of the connecting shaft (103) is fixedly connected to a hydraulic frame (110), a hydraulic cylinder (111) is fixedly connected between the hydraulic frame (110) and the test bench (102), and the hydraulic frame (110) is fixedly connected to the detection frame (104).

2. The reliability testing device for a steel wheel of a road roller according to claim 1, characterized in that: A panel (4) is fixedly connected to the top of the chassis (1); windows (401) are arranged in a matrix on the surface of the panel (4); and the top of the triangular piece (301) corresponds to the window (401).

3. The reliability testing device for a steel wheel of a road roller according to claim 2, characterized in that: A protective film (402) is fixedly connected to the interior of the window (401), a through hole (403) is provided in the middle of the protective film (402), and the top end of the triangular piece (301) is sleeved with the through hole (403).

4. The reliability testing device for a steel wheel of a road roller according to claim 3, characterized in that: The top end of the triangle piece (301) is fixedly connected to a mushroom head (404), and the through hole (403) is sleeved with the handle end of the mushroom head (404).

5. The reliability testing device for a steel wheel of a road roller according to claim 3, characterized in that: The left and right ends of the protective film (402) are both folded in a wave shape, the folding direction of the protective film (402) corresponds to the sliding direction of the electric cylinder (303), and the protective film (402) is made of an elastic rubber material.

6. The reliability testing device for a steel wheel of a road roller according to claim 3, characterized in that: An elastic rib (405) is fixedly connected between the through hole (403) and the window (401); the axial direction of the elastic rib (405) corresponds to the sliding direction of the electric cylinder (303); the elastic rib (405) is bent in a downward arc shape; and the elastic rib (405) is made of spring steel material.

7. A reliability testing device for a steel wheel of a road roller according to claim 6, characterized in that: A connecting wire (406) is fixedly connected between the middle of the elastic rib (405) and the bottom of the folded end of the protective film (402), and the connecting wire (406) is made of a tensile fiber material.

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