A road roller steel wheel testing device

Abstract

The invention discloses a steel wheel test device for a road roller, comprising a loading drive machine, a speaker observation dark box, a steel wheel lateral monitoring mechanism, a road surface simulation mechanism, a round box, an iron core disk and an electromagnet. The invention is beneficial in that: a high-definition camera located in the speaker observation dark box is used to take real-time photos of the end portion of the test steel wheel appearing in the cross hole, and the use state image and related position coordinate data of the test steel wheel in the vibration and other environments during operation are obtained; by combining the data processing of the image processor and the digital analog signal converter, the processed data is converted in the form of waves and presented on the display, so as to achieve a more subtle and comprehensive operation state test of the steel wheel of the road roller, and provide a more accurate data basis for the subsequent optimization and manufacturing of the steel wheel of the road roller; the invention has the function of simulating the running resistance of the steel wheel of the road roller on different roads, replacing the test method of the suspended no-load test of the steel wheel of the road roller in the prior art, which is closer to the construction environment.

Description

Technical Field

[0001] The invention relates to the technical field of road construction machinery and test detection, in particular to a steel wheel testing device for a road roller. 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 degree and reach the designed compaction value, thereby enabling the material to have a certain load-bearing capacity and overall stability. As the core component of the road roller, the steel wheel generally needs to undergo rigorous reliability tests after research and development to expose its faults or defects, thereby providing a test reference for design improvement and optimization.

[0003] The existing roller steel wheel testing device has a single test structure and function, and the test is not comprehensive enough. It cannot test and monitor the steel wheel from subtle angles. In addition, the tested steel wheels are mostly tested without contacting the ground, resulting in low accuracy of test results obtained under operating environment conditions such as vibration. Summary of the invention

[0004] The purpose of the present invention is to provide a roller steel wheel testing device in order to solve the above problems.

[0005] The present invention achieves the above-mentioned purpose through the following technical scheme: a steel wheel testing device for a road roller, comprising a loading drive, a bracket for mounting a steel wheel, a horn observation dark box, a steel wheel lateral monitoring mechanism, a road surface simulation mechanism, a U-shaped plate, a round box, an iron core disk, a transfer tube and an electromagnet, a horn observation dark box is arranged just in front of one end of a test steel wheel connected to two of the brackets, and the test steel wheel is in contact with the road surface simulation mechanism, the horn observation dark box is provided with a steel wheel lateral monitoring mechanism, and the horn observation dark box and the test steel wheel are in a coaxial position state;

[0006] The steel wheel lateral monitoring mechanism includes a high-definition camera, an image processor, a circular plate, a cross hole and a digital-to-analog signal converter. The high-definition camera located in the middle of the speaker observation dark box is coaxial with the cross hole, and the cross hole is opened in the middle of the circular plate. The image processor is electrically connected between the high-definition camera and the digital-to-analog signal converter, and the digital-to-analog signal converter is connected to the display through a corresponding signal line.

[0007] The road surface simulation mechanism includes a contact layer, a base tube, a short tube seat, a strong spring, a disc and a coupling. The contact layer is arranged on the surface of the base tube, and a coupling is arranged in the middle of the base tube. The short tubes distributed in the base tube port are connected with the short tubes on the disc through a strong spring. An iron core disc is installed at one end of the coupling in the round box, and an electromagnet is arranged between the two iron core discs in the same round box. The two ends of the coupling in the round box are rotatably connected through a switching ring.

[0008] Preferably, the contact layer is not limited to one roadbed material, and the contact layers on the two base pipes are different roadbed materials.

[0009] Preferably, a scale is distributed on the cross hole, and the cross hole is set as a test reference benchmark for testing the running end of the steel wheel.

[0010] Preferably, a carrier is installed at the bottom of the speaker observation darkbox, and the bottom of the carrier is slidably installed between two guide rails. A screw structure is connected to a lead screw through a screw hole structure in the middle of the bottom of the carrier, and the lead screw is rotatably installed between two fixed seats.

[0011] Preferably, a bearing seat is installed at the other end of the connecting shaft, and the bearing seat is installed and connected to the output end of the second oil cylinder, and the cylinder body part of the second oil cylinder is fixedly connected to the L-shaped plate connected to one side of the bracket.

[0012] Preferably, a transfer tube is provided in the round box, and ports at both ends of the transfer tube are rotatably connected to corresponding ends of the connecting shaft through bearings.

[0013] Preferably, two guide rods are symmetrically installed at the bottom of the round box, and the two guide rods partially slide through the conduits, and the two conduits are symmetrically installed in the middle part of the same U-shaped plate.

[0014] Preferably, the end shaft on one side of the test steel wheel is connected to the output end of the loading drive machine through a coupling.

[0015] Preferably, oil cylinders are installed on both sides of the top of the bracket, and the output ends of the two oil cylinders are fixedly connected to the two ends of the same bearing reinforcement cover, respectively, and a tooling structure for restraining the end shaft of the test steel wheel is formed between the bearing reinforcement cover and the top of the bracket.

[0016] The beneficial effects of the present invention are:

[0017] 1. Use a high-definition camera located in the speaker observation dark box to take real-time photos of the end portion of the test steel wheel that appears in the cross hole, and obtain the use status image and related position coordinate data of the test steel wheel in the vibration environment during operation;

[0018] Second, by combining the data processing of the image processor and the digital analog signal converter, the processed data is converted into waves and presented on the display, which are waveform diagrams of the operating status changes of the test steel wheel parts corresponding to the four holes at the cross hole, so as to achieve a more detailed and comprehensive operating status test of the roller steel wheel, and provide more accurate data basis for the subsequent optimization and manufacturing of the roller steel wheel;

[0019] 3. The energized electromagnet exerts different degrees of magnetic attraction constraints on the iron core disk at the end of the coupling shaft with different magnetic field strengths, which is convenient for adjusting and changing the rotation resistance of the coupling shaft and its connecting parts, and plays a role in simulating the running resistance of the roller steel wheel on different roads, replacing the test method of the existing technology of the roller steel wheel suspended and no-load test, which is closer to the construction environment;

[0020] Fourth, the strong springs connected to the two discs in the same group through the ports at both ends of the base tube are helpful to buffer the instantaneous change of rotational resistance and reduce unnecessary loss of some structures during the test process. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 It is a side sectional view of the structure of the steel wheel lateral monitoring mechanism of the present invention;

[0024] Figure 3 It is a front view of the steel wheel lateral monitoring mechanism of the present invention;

[0025] Figure 4 It is a schematic diagram of the structure of the road surface simulation mechanism of the present invention;

[0026] Figure 5 for Figure 1 An enlarged cross-sectional view of the connection structure at A in the middle;

[0027] Figure 6 for Figure 1 A magnified view of the connection structure at B in the middle;

[0028] Figure 7 This is a schematic diagram of the support connection structure of the present invention;

[0029] Figure 8 This is a diagram showing the use of the test steel wheel of the present invention in conjunction with the cross hole.

[0030] In the figure: 1. loading driver; 2. coupling; 3. bracket; 301. oil cylinder one; 302. bearing reinforcement cover; 4. test steel wheel; 5. display; 501. signal line; 6. speaker observation dark box; 601. high-definition camera; 602. image processor; 603. round plate; 604. cross hole; 7. digital analog signal converter; 8. road simulation mechanism; 801. contact layer; 802. base pipe; 803. short pipe seat; 804. strong spring; 805. round disc; 806. coupling; 9. U-shaped plate; 10. guide rod; 11. guide tube; 12. L-shaped plate; 13. oil cylinder two; 14. fixed seat; 15. lead screw; 1501. guide rail; 16. carrier; 17. bearing seat; 18. round box; 19. core disk; 20. transfer tube; 21. electromagnet. DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0032] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0033] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0034] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0035] In addition, the terms "installed", "set", "provided with", "connected", "connected", and "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0036] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0037] See also Figure 1-8 As shown, a steel wheel testing device for a road roller comprises a loading drive machine 1, a bracket 3 for mounting a steel wheel, a horn observation dark box 6, a steel wheel lateral monitoring mechanism, a road surface simulation mechanism 8, a U-shaped plate 9, a round box 18, an iron core plate 19, a transfer tube 20 and an electromagnet 21, a horn observation dark box 6 is arranged just in front of one end of a test steel wheel 4 connected to two of the brackets 3, and the test steel wheel 4 is in contact with the road surface simulation mechanism 8, a steel wheel lateral monitoring mechanism is arranged on the horn observation dark box 6, and the horn observation dark box 6 and the test steel wheel 4 are in a coaxial position state;

[0038] Specific combination Figure 2 , Figure 3 and Figure 8 As shown, the steel wheel lateral monitoring mechanism includes a high-definition camera 601, an image processor 602, a circular plate 603, a cross hole 604 and a digital-to-analog signal converter 7. The high-definition camera 601 located in the middle of the speaker observation dark box 6 is coaxial with the cross hole 604, and the cross hole 604 is opened in the middle of the circular plate 603. The image processor 602 is electrically connected between the high-definition camera 601 and the digital-to-analog signal converter 7, and the digital-to-analog signal converter 7 is connected to the display 5 through the corresponding signal line 501. A scale is distributed on the cross hole 604, and the cross hole 604 is set as a test reference benchmark for testing the running end of the steel wheel 4;

[0039] The cross hole 604 with scale size is used as a reference benchmark for the operating test condition of the end of the test steel wheel 4, and combined with the high-definition camera 601, the data coordinates of each position on the image can be constructed, and then the high-definition camera 601 located in the speaker observation darkroom 6 is used to take real-time photos of the end part of the test steel wheel 4 appearing in the cross hole 604, in order to obtain the use status image and related position coordinate data of the test steel wheel 4 in the vibration environment during operation, and then the acquired data is processed by the image processor 602, and then transmitted to the digital analog signal converter 7 to be converted and presented on the display 5 in the form of waves, which are respectively waveform diagrams of the operating status changes of the parts of the test steel wheel 4 corresponding to the four holes at the cross hole 604, so as to realize a more subtle and comprehensive operating status test of the roller steel wheel, and provide a more accurate data basis for the subsequent optimization and manufacturing of the roller steel wheel.

[0040] Specific combination Figure 4 , Figure 5 and Figure 6 The pavement simulation mechanism 8 includes a contact layer 801, a base tube 802, a short tube seat 803, a strong spring 804, a disc 805 and a connecting shaft 806. The contact layer 801 is arranged on the surface of the base tube 802, and a connecting shaft 806 is arranged in the middle of the base tube 802. The short tubes distributed in the port of the base tube 802 are connected with the short tubes on the disc 805 through a strong spring 804. An iron core disk 19 is installed at one end of the connecting shaft 806 in the round box 18, and an electromagnet 21 is arranged between the two iron core disks 19 in the same round box 18. The ends of the two connecting shafts 806 in the round box 18 are rotatably connected through a transfer ring. The contact layer 801 is not limited to one roadbed material, and the contact layers 801 on the two base tubes 802 are different roadbed materials.

[0041] The energized electromagnet 21 is combined with different magnetic field strengths to magnetically constrain the iron core disk 19 at the end of the coupling 806 to different degrees, so as to adjust and change the rotation resistance of the coupling 806 and its connecting parts, and play a role in simulating the running resistance of the roller wheel on different roads, replacing the test method of the existing technology of the roller wheel suspended and no-load test, which is closer to the construction environment;

[0042] The strong springs 804 respectively connected to the two disks 805 in the same group through the ports at both ends of the base tube 802 are helpful to buffer the instantaneous change of the rotation resistance and reduce unnecessary loss of some structures during the test process.

[0043] like Figure 1As shown, a carrier 16 is installed at the bottom of the speaker observation darkroom 6, and the bottom of the carrier 16 is slidably installed between two guide rails 1501. The middle position of the bottom of the carrier 16 is connected to the lead screw 15 through a screw hole structure, and the lead screw 15 is rotatably installed between two fixed seats 14. The lead screw 15 rotates and drives the threaded carrier 16 to move along the guide rail 1501, which has the function of adjusting the position of the speaker observation darkroom 6.

[0044] like Figure 1 and Figure 6 As shown, a bearing seat 17 is installed at the other end of the connecting shaft 806, and the bearing seat 17 is installed and connected to the output end of the oil cylinder 13. The cylinder body of the oil cylinder 13 is fixedly connected to the L-shaped plate 12 connected to one side of the bracket 3. The connecting shaft 806 and its connecting part are moved upward by using the oil cylinder 13 to facilitate the contact between the contact layer 801 and the surface of the test steel wheel 4.

[0045] like Figure 5 As shown, a transfer tube 20 is provided in the circular box 18, and both end ports of the transfer tube 20 are rotatably connected to the corresponding end of the connecting shaft 806 through bearings, which not only plays the role of mutual connection and support, but also enables the two connecting shafts 806 to operate independently, meeting the use requirements of the contact operation test between the contact layer of different roadbed materials and the test steel wheel 4.

[0046] like Figure 1 and Figure 5 As shown, two guide rods 10 are symmetrically installed at the bottom of the round box 18, and the two guide rods 10 partially slide through the conduit 11. The two conduits 11 are symmetrically installed in the middle part of the same U-shaped plate 9 to prevent the round box 18 from rotating.

[0047] Furthermore, the end shaft on one side of the test steel wheel 4 is connected to the output end of the loading driver 1 through a coupling 2 .

[0048] Furthermore, oil cylinders 301 are installed on both sides of the top of the bracket 3, and the output ends of the two oil cylinders 301 are respectively fixedly connected to the two ends of the same bearing reinforcement cover 302, and a tooling structure for restraining the end shaft of the test steel wheel 4 is formed between the bearing reinforcement cover 302 and the top of the bracket 3.

[0049] Working principle: The cross hole 604 with scale size is used as a reference benchmark for the running test condition of the end of the test steel wheel 4, and combined with the high-definition camera 601, the data coordinates of each position on the image can be constructed, and then the high-definition camera 601 located in the speaker observation dark box 6 is used to take real-time photos of the end part of the test steel wheel 4 appearing in the cross hole 604, in order to obtain the use status image and related position coordinate data of the test steel wheel 4 in the vibration environment during operation, and then the acquired data is processed by the image processor 602, and then transmitted to the digital analog signal converter 7 to be converted and presented on the display 5 in the form of waves, which are respectively the running status change waveform diagrams of the parts of the test steel wheel 4 corresponding to the four holes at the cross hole 604, so as to realize a more subtle and comprehensive running status test of the roller steel wheel, and provide a more accurate data basis for the subsequent optimization and manufacturing of the roller steel wheel;

[0050] The specific usage is as follows:

[0051] Step 1: Place the test steel wheel 4 between the top ends of the two brackets 3, and first turn the test steel wheel 4 sideways to move the bearing parts of its two shaft ends to the bottom of the bearing reinforcement cover 302, and then pull down the bearing reinforcement cover 302 through the contracted oil cylinder 1 301 to fix it;

[0052] Step 2: After the steel wheel 4 to be tested is fixed, one end of the steel wheel 4 is connected to the output end of the loading driver 1 via the coupling 2;

[0053] Step 3: Rotate the lead screw 15 to drive the threaded carrier 16 to move leftward along the guide rail 1501, and further drive the circular plate 603 at the port of the connected speaker observation dark box 6 and the cross hole 604 in the middle of the circular plate 603 to align with the other end of the test steel wheel 4;

[0054] Step 4: The second operating cylinder 13 is in an extended state to move the connecting shaft 806 connected via the bearing seat 17 and the road surface simulation mechanism 8 placed on the connecting shaft 806 upward together, until the contact layer 801 on the road surface simulation mechanism 8 contacts the surface of the test steel wheel 4 at a set pressure, and the contact pressure setting between the two can be adjusted by using the second operating cylinder 13;

[0055] Step 5: Overall debugging, after completion, the overall operation begins to test;

[0056] Under the condition of a certain contact pressure between the contact layer 801 and the test steel wheel 4, the iron core disk 19 at the end of the coupling 806 is subjected to different degrees of magnetic attraction constraints with different magnetic field strengths in combination with the energized electromagnet 21, so as to facilitate the adjustment and change of the rotation resistance of the coupling 806 and its connecting parts, and play the role of simulating the running resistance of the steel wheel of the roller on different roads, replacing the test method of the existing technology of the steel wheel of the roller suspended and no-load test, which is closer to the construction environment;

[0057] The strong springs 804 respectively connected to the two disks 805 in the same group through the ports at both ends of the base tube 802 are helpful to buffer the instantaneous change of the rotation resistance and reduce unnecessary loss of some structures during the test process.

[0058] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A roller steel wheel testing device, characterized in that: The invention comprises a loading drive machine (1), a bracket (3) for mounting a steel wheel, a horn observation dark box (6), a steel wheel lateral monitoring mechanism, a road surface simulation mechanism (8), a U-shaped plate (9), a round box (18), an iron core plate (19), a transfer tube (20) and an electromagnet (21); a horn observation dark box (6) is arranged just in front of one end of a test steel wheel (4) connected to the two brackets (3); the test steel wheel (4) is in contact with the road surface simulation mechanism (8); the horn observation dark box (6) is provided with a steel wheel lateral monitoring mechanism, and the horn observation dark box (6) and the test steel wheel (4) are in a coaxial position; The steel wheel lateral monitoring mechanism comprises a high-definition camera (601), an image processor (602), a circular plate (603), a cross hole (604) and a digital-to-analog signal converter (7); the high-definition camera (601) located in the middle of the speaker observation dark box (6) is coaxial with the cross hole (604), and the cross hole (604) is opened in the middle of the circular plate (603); the image processor (602) is electrically connected between the high-definition camera (601) and the digital-to-analog signal converter (7), and the digital-to-analog signal converter (7) is connected to the display (5) via a corresponding signal line (501); a scale is distributed on the cross hole (604), and the cross hole (604) is set as a test reference benchmark for the running end of the test steel wheel (4); The road surface simulation mechanism (8) comprises a contact layer (801), a base tube (802), a short tube seat (803), a strong spring (804), a disc (805) and a connecting shaft (806); the contact layer (801) is arranged on the surface of the base tube (802), and a connecting shaft (806) is arranged in the middle of the base tube (802); short tubes distributed in the port of the base tube (802) and short tubes located on the disc (805) are connected via a strong spring (804); an iron core disc (19) is installed at one end of the connecting shaft (806) located in the round box (18), and an electromagnet (21) is arranged between two iron core discs (19) located in the same round box (18); and the ends of the two connecting shafts (806) located in the round box (18) are rotatably connected via a transfer ring.

2. A roller steel wheel testing device according to claim 1, characterized in that: The contact layer (801) is not limited to one type of roadbed material, and the contact layers (801) located on the two base pipes (802) are made of different roadbed materials.

3. A roller steel wheel testing device according to claim 1, characterized in that: A carrier (16) is installed at the bottom of the speaker observation dark box (6), and the bottom of the carrier (16) is slidably installed between two guide rails (1501). A screw hole structure is connected to the lead screw (15) at the middle position of the bottom of the carrier (16), and the lead screw (15) is rotatably installed between the two fixed seats (14).

4. A roller steel wheel testing device according to claim 1, characterized in that: A bearing seat (17) is installed at the other end of the connecting shaft (806), and the bearing seat (17) is installed and connected to the output end of the second oil cylinder (13), and the cylinder body of the second oil cylinder (13) is fixedly connected to the L-shaped plate (12) connected to one side of the bracket (3).

5. The roller steel wheel testing device according to claim 1, characterized in that: A transfer tube (20) is provided in the round box (18), and ports at both ends of the transfer tube (20) are rotatably connected to one end of a corresponding connecting shaft (806) via bearings.

6. A roller steel wheel testing device according to claim 1, characterized in that: Two guide rods (10) are symmetrically mounted on the bottom of the round box (18), and the two guide rods (10) partially slide through the guide tube (11). The two guide tubes (11) are symmetrically mounted in the middle of the same U-shaped plate (9).

7. A roller steel wheel testing device according to claim 1, characterized in that: The end shaft on one side of the test steel wheel (4) is connected to the output end of the loading drive machine (1) via a coupling (2).

8. The roller steel wheel testing device according to claim 1, characterized in that: Oil cylinders 1 (301) are installed on both sides of the top of the bracket (3), and the output ends of the two oil cylinders 1 (301) are respectively fixedly connected to the two ends of the same bearing reinforcement cover (302), and a tooling structure for restraining the end shaft of the test steel wheel (4) is formed between the bearing reinforcement cover (302) and the top of the bracket (3).

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