LED signage wind load fatigue test equipment

Abstract

The utility model discloses a kind of LED signboard wind load fatigue test equipment, including rack, driving mechanism and impact mechanism;The rack includes base, and LED signboard can be fixedly arranged on the base;The driving mechanism includes box, driving cylinder and electromagnetic chuck, the box is set on the rack, the driving cylinder is set on the top of the box, the piston rod of driving cylinder extends into the box, and the electromagnetic chuck is set on the piston rod of the driving cylinder;The impact mechanism includes magnet connecting plate, fixed frame and sandbag storehouse, the magnet connecting plate is set on the top of the fixed frame, the magnet connecting plate can be connected with the electromagnetic chuck magnetically, the sandbag storehouse is set on the fixed frame, the sandbag storehouse is used to accommodate sandbag, and the sandbag storehouse is suspended directly above the base. By making impact mechanism frequently impact LED signboard, the fatigue resistance of LED signboard is tested.

Description

Technical Field

[0001] This utility model relates to the field of fatigue testing equipment technology, and in particular to an LED signboard wind load fatigue testing device. Background Technology

[0002] LED signs are a type of traffic sign, typically consisting of a sign face, a sign base, a solar panel, a controller, and light-emitting units (LEDs). They use text and graphics to convey warnings, prohibitions, and instructions to drivers and pedestrians, serving as a safety facility for managing road traffic. During the day, the solar panel absorbs sunlight, converting it into electrical energy, which is stored in an energy storage device. At night, the electrical energy in the storage device is automatically converted into light energy (controlled by a photoelectric switch), which is then emitted by the LEDs to outline the patterns and convey traffic information. It provides road users with accurate road traffic information, ensuring safe and smooth traffic flow. It is crucial for the safety of drivers and pedestrians, and is an indispensable traffic safety facility.

[0003] Currently, the sandbag pressure test for traffic lights is mainly conducted according to the GB 14887-2011 "Road Traffic Signals" standard, used to verify the performance of the signal lights under certain pressure. The specific test method is as follows:

[0004] Test preparation: Prepare a sufficient number of sandbags and ensure that the sandbags are of uniform quality. The weight can be adjusted by adding or removing filling. At the same time, check the installation of the signal lights to ensure that they are firmly fixed in accordance with normal use.

[0005] Applying pressure: Taking the installation height of the signal light as 8m as an example, the sandbag is used as a constant uniform load and applied to the light fixture for ten minutes, so that the pressure generated by the sandbag on the projection surface of the light fixture is 1.5kN / ㎡.

[0006] Observation and Recording: During the test, continuously observe whether the signal lights are damaged or displaced from the fixed point. At the same time, record the state of the signal lights under pressure. After maintaining the pressure for a period of time, remove the sandbags and check the permanent deformation of the signal lights. The permanent deformation should not exceed 10%.

[0007] However, this experiment has flaws. The original standard of "applying sandbags as a constant uniform load to the lamps for ten minutes" is far from sufficient. It is a fatigue test, not a one-time test.

[0008] Therefore, there is an urgent need for a testing device to conduct fatigue tests on LED signs. Utility Model Content

[0009] In order to overcome the shortcomings of the existing technology, the purpose of this utility model is to provide an LED sign wind load fatigue testing device for conducting wind load fatigue testing experiments on LED signs.

[0010] This utility model is achieved by the following technical solution: an LED sign wind load fatigue testing device, including a frame, a drive mechanism and an impact mechanism;

[0011] The frame includes a base, and an LED sign can be fixedly mounted on the base;

[0012] The driving mechanism includes a housing, a driving cylinder, and an electromagnetic chuck. The housing is mounted on the frame, the driving cylinder is mounted on the top of the housing, the piston rod of the driving cylinder extends into the housing, and the electromagnetic chuck is mounted on the piston rod of the driving cylinder.

[0013] The impact mechanism includes a magnetic connecting plate, a fixing frame, and a sandbag bin. The magnetic connecting plate is located at the top of the fixing frame and can be magnetically connected to the electromagnetic chuck. The sandbag bin is located on the fixing frame and is used to hold sandbags. The sandbag bin is suspended directly above the base.

[0014] In one possible implementation, the top of the housing is provided with a first through hole, and the electromagnetic chuck is provided with a first guide rod, which is slidably inserted through the first through hole.

[0015] In one possible implementation, the bottom of the housing is provided with a second through hole, the fixing frame is provided with a second guide rod, the second guide rod is slidably inserted through the second through hole, and the magnet connecting plate is disposed at the upper end of the second guide rod.

[0016] In one possible implementation, the fixing frame includes a fixing plate and a plurality of fixing rods, the plurality of fixing rods being respectively connected to the fixing plate, and the lower end of the second guide rod being connected to the fixing plate;

[0017] The sandbag bin is equipped with multiple connecting rods, and each connecting rod is connected to each of the fixed rods in a one-to-one correspondence.

[0018] In one possible implementation, the base is provided with a pad, and an LED sign is disposed on the pad.

[0019] In one possible implementation, the pad has an arc-shaped groove, and the pillar on the back of the LED sign is placed in the arc-shaped groove;

[0020] It also includes a locking block, which can be fixedly connected to the pad block.

[0021] In one possible implementation, the upper end of the frame is provided with a crossbeam, and the drive mechanism is movably mounted on the crossbeam.

[0022] In one possible implementation, the lower end of the housing is provided with a connecting hole, and the crossbeam is provided with a connecting groove, the connecting groove extending along the length of the crossbeam, and the connecting hole corresponding to the connecting groove.

[0023] In one possible implementation, both the magnet connecting plate and the electromagnetic chuck are disc-shaped, the piston rod of the driving cylinder is connected to the center of the electromagnetic chuck, and the center of the magnet connecting plate is provided with a clearance hole, into which the piston rod of the driving cylinder extends.

[0024] In one possible implementation, an electrical control box is also included, which is electrically connected to the drive mechanism and has a touch screen, a control switch, and an emergency stop button.

[0025] Compared with the prior art, the beneficial effects of this utility model are as follows: the driving cylinder can drive the electromagnetic chuck to approach the magnetic connecting plate. When the electromagnetic chuck is energized, it can be magnetically connected to the magnetic connecting plate. Then the driving cylinder drives the entire impact mechanism to move upward. After moving upward a certain distance, the electromagnetic chuck is de-energized, and the impact mechanism performs free fall motion to impact the LED sign. Then the driving cylinder drives the impact mechanism to move upward again, repeating the cycle so that the impact mechanism can frequently impact the LED sign to test the fatigue resistance of the LED sign. Attached Figure Description

[0026] Figure 1 This is a structural schematic diagram of the LED signboard wind load fatigue testing equipment of this utility model;

[0027] Figure 2 This is a schematic diagram of the drive mechanism in the wind load fatigue testing equipment for LED signs of this utility model;

[0028] Figure 3 This is a schematic diagram of the impact mechanism in the wind load fatigue testing equipment for LED signs of this utility model;

[0029] Figure 4 This is a partial structural schematic diagram of the LED signboard wind load fatigue testing equipment of this utility model;

[0030] Figure 5 This is a schematic diagram of the crossbeam structure in the LED sign wind load fatigue testing equipment of this utility model.

[0031] In the picture:

[0032] 1. Frame; 11. Base; 12. Pad; 13. Locking block; 14. Crossbeam; 141. Connecting groove;

[0033] 2. Drive mechanism; 21. Housing; 211. First through hole; 212. Second through hole; 213. Connecting hole; 22. Drive cylinder; 23. Electromagnetic chuck; 24. First guide rod;

[0034] 3. Impact mechanism; 31. Magnet connecting plate; 311. Clearance hole; 32. Fixing frame; 321. Fixing plate; 322. Fixing rod; 323. Second guide rod; 33. Sandbag bin; 331. Connecting rod;

[0035] 4. Electrical control box. Detailed Implementation

[0036] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0037] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0038] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.

[0039] like Figure 1-5The LED sign wind load fatigue testing device shown includes a frame 1, a drive mechanism 2, and an impact mechanism 3. The frame 1 includes a base 11, on which the LED sign can be fixedly mounted. The drive mechanism 2 includes a housing 21, a drive cylinder 22, and an electromagnetic chuck 23. The housing 21 is mounted on the frame 1, the drive cylinder 22 is mounted on the top of the housing 21, the piston rod of the drive cylinder 22 extends into the housing 21, and the electromagnetic chuck 23 is mounted on the piston rod of the drive cylinder 22. The impact mechanism 3 includes a magnet connecting plate 31, a fixing frame 32, and a sandbag chamber 33. The magnet connecting plate 31 is mounted on the top of the fixing frame 32 and can be magnetically connected to the electromagnetic chuck 23. The sandbag chamber 33 is mounted on the fixing frame 32 and is used to hold sandbags. The sandbag chamber 33 is suspended directly above the base 11. It should be noted that the electromagnetic chuck 23 is an electromagnetic clamp that uses the suction force generated by the chuck body after the electromagnetic coil is energized to fix the workpiece being processed. The electromagnetic chuck 23 consists of several parts, including an iron core, a coil, a panel, and a bracket. The electromagnet, composed of the coil and the iron core, is the main part of the electromagnetic chuck 23. The electromagnetic chuck 23 can be fixed to the end of the piston rod of the drive cylinder 22 by bolts. Users can change the weight of the sandbag chamber 33 by loading different numbers of sandbags into it, thereby changing the impact force of the impact mechanism 3 on the LED sign and obtaining more comprehensive test data. The bottom surface of the sandbag chamber 33 is flat and can cover the entire upper surface of the LED sign, so that the sandbag chamber 33 can impact the entire upper surface of the LED sign, making the LED sign bear force evenly and improving the accuracy of the test data.

[0040] The beneficial effects of this utility model are as follows: the driving cylinder 22 can drive the electromagnetic chuck 23 to approach the magnet connecting plate 31. When the electromagnetic chuck 23 is energized, it can be magnetically connected to the magnet connecting plate 31. Then the driving cylinder 22 drives the entire impact mechanism 3 to move upward. After moving upward a certain distance, the electromagnetic chuck 23 is de-energized, and the impact mechanism 3 performs free fall motion to impact the LED sign. Then the driving cylinder 22 drives the impact mechanism 3 to move upward again. This cycle repeats, allowing the impact mechanism 3 to frequently impact the LED sign in order to test the fatigue resistance of the LED sign.

[0041] Please refer to Figure 2 In one possible implementation, the top of the housing 21 is provided with a first through hole 211, and the electromagnetic chuck 23 is provided with a first guide rod 24, which is slidably inserted through the first through hole 211. It should be noted that the first guide rod 24 extends out of the housing 21 through the first through hole 211, and the first guide rod 24 can guide and fix the electromagnetic chuck 23, which helps to improve the stability of the movement of the electromagnetic chuck 23. Furthermore, there are two first guide rods 24, which are symmetrically arranged on both sides of the electromagnetic chuck 23.

[0042] Please refer to Figure 2 and Figure 4 In one possible implementation, the bottom of the housing 21 is provided with a second through hole 212, and the fixing frame 32 is provided with a second guide rod 323. The second guide rod 323 is slidably inserted through the second through hole 212, and the magnet connecting plate 31 is disposed at the upper end of the second guide rod 323. It should be noted that the second guide rod 323 extends into the housing 21 through the second through hole 212. The setting of the second guide rod 323 can guide the fixing frame 32, which helps to improve the stability of the movement of the fixing frame 32. Furthermore, the length of the second guide rod 323 is greater than the free fall stroke of the impact mechanism 3. That is to say, the sliding stroke of the second guide rod 323 is greater than the falling stroke of the impact mechanism 3, thereby ensuring that the impact mechanism 3 can impact the LED sign in a free fall manner and avoiding contact between the magnet connecting plate 31 and the bottom of the housing 21.

[0043] Please refer to Figure 3 In one possible implementation, the fixing frame 32 includes a fixing plate 321 and multiple fixing rods 322, with the multiple fixing rods 322 respectively connected to the fixing plate 321. The lower end of the second guide rod 323 is connected to the fixing plate 321. The sandbag bin 33 is provided with multiple connecting rods 331, each connecting rod 331 being connected to each fixing rod 322 in a one-to-one correspondence. It should be noted that the fixing plate 321 and the connecting rods 331 can be fixedly connected by bolts. The fixing plate 321 is disc-shaped, and there are four fixing rods 322, which are spaced 90° apart. Correspondingly, the sandbag bin 33 is provided with four connecting rods 331, with one end of the fixing rod 322 connected to the fixing plate 321 and the other end of the fixing rod 322 connected to the connecting rod 331.

[0044] Please refer to Figure 4 In one possible implementation, a pad 12 is provided on the base 11, and the LED sign is placed on the pad 12. It should be noted that the LED sign includes the sign itself and the column on its back to simulate the sign's usage state and improve the accuracy of the test data. The pad 12 can be fixed to the base 11 by bolts. The pad 12 is used to position and support the column of the LED sign, and there are three pads 12. The three pads 12 are evenly spaced and support the front, middle and rear parts of the column respectively.

[0045] Please refer to Figure 1 and Figure 4In one possible implementation, the pad 12 has an arc-shaped groove, and the pillar on the back of the LED sign is placed in the arc-shaped groove; it also includes a locking block 13, which can be fixedly connected to the pad 12. It should be noted that the locking block 13 also has an arc-shaped groove, and after the locking block 13 is connected to the pad 12, it forms a complete circular hole. The pad 12 and the locking block 13 can be fixedly connected by bolts. The pad 12 and the locking block 13 cooperate to fasten the pillar, thereby fixing the LED sign. Furthermore, there are two locking blocks 13, and the two locking blocks 13 are respectively connected to the pads 12 at the front and rear ends to fix the two ends of the pillar, which helps to improve the stability of the LED sign.

[0046] Please refer to Figure 1 In one possible implementation, a crossbeam 14 is provided at the upper end of the frame 1, and the drive mechanism 2 is movably mounted on the crossbeam 14. It should be noted that the drive mechanism 2 is mounted on the crossbeam 14 of the frame 1, and the impact mechanism 3 is mounted on the drive mechanism 2. By allowing the drive mechanism 2 to move along the crossbeam 14 to change the position of the impact mechanism 3, the position of the impact mechanism 3 can be adjusted, improving the flexibility of the impact mechanism 3. Furthermore, there are two crossbeams 14, and the second guide rod 323 passes between the two crossbeams 14.

[0047] Please refer to Figure 2 and Figure 5 In one possible implementation, the lower end of the housing 21 is provided with a connecting hole 213, and the crossbeam 14 is provided with a connecting groove 141. The connecting groove 141 extends along the length of the crossbeam 14, and the connecting hole 213 corresponds to the connecting groove 141. It should be noted that the housing 21 and the crossbeam 14 can be fixedly connected by fastening bolts. The connecting hole 213 and the connecting groove 141 are used to provide an installation base for the fastening bolts. The connecting groove 141 extends along the length of the crossbeam 14 and passes through the crossbeam 14. The user can change the installation position of the housing 21 by changing the corresponding position of the connecting hole 213 and the connecting groove 141, thereby achieving the purpose of the drive mechanism 2 being movable along the crossbeam 14.

[0048] Please refer to Figure 3In one possible implementation, both the magnetic connecting plate 31 and the electromagnetic chuck 23 are disc-shaped. The piston rod of the driving cylinder 22 is connected to the center of the electromagnetic chuck 23. The magnetic connecting plate 31 has a clearance hole 311 at its center, into which the piston rod of the driving cylinder 22 extends. It should be noted that the disc-shaped design of the magnetic connecting plate 31 and the electromagnetic chuck 23 allows the piston rod of the driving cylinder 22 to be connected to the center of the electromagnetic chuck 23, and the second guide rod 323 to be connected to the center of the magnetic connecting plate 31, which helps improve its balance. Since the second guide rod 323 extends into the center of the magnetic connecting plate 31, its upper end has a clearance hole 311 into which the end of the piston rod of the driving cylinder 22 extends. The clearance hole 311 ensures a tighter fit between the magnetic connecting plate 31 and the electromagnetic chuck 23, improving the stability of their magnetic connection.

[0049] Please refer to Figure 1 In one possible implementation, an electrical control box 4 is also included. The electrical control box 4 is electrically connected to the drive mechanism 2. The electrical control box 4 has a touch screen, a control switch, and an emergency stop button. It should be noted that the electrical control box 4 can control whether to supply power to the electromagnetic chuck 23 to control the status of the electromagnetic chuck 23. The touch screen is used to display the real-time status of the device for user understanding. The control switch is used to start / stop the drive mechanism 2, and the emergency stop button is used to stop the device in case of an accident, improving device safety. In addition, the electrical control box 4 is set separately and can be slightly away from the device to improve the safety of operators when operating the electrical control box 4.

[0050] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A wind load fatigue testing device for LED signs, characterized in that, Includes frame, drive mechanism and impact mechanism; The frame includes a base, and an LED sign can be fixedly mounted on the base; The driving mechanism includes a housing, a driving cylinder, and an electromagnetic chuck. The housing is mounted on the frame, the driving cylinder is mounted on the top of the housing, the piston rod of the driving cylinder extends into the housing, and the electromagnetic chuck is mounted on the piston rod of the driving cylinder. The impact mechanism includes a magnetic connecting plate, a fixing frame, and a sandbag bin. The magnetic connecting plate is located at the top of the fixing frame and can be magnetically connected to the electromagnetic chuck. The sandbag bin is located on the fixing frame and is used to hold sandbags. The sandbag bin is suspended directly above the base.

2. The LED signboard wind load fatigue testing equipment as described in claim 1, characterized in that, The top of the box is provided with a first through hole, and the electromagnetic chuck is provided with a first guide rod, which can slide through the first through hole.

3. The LED signboard wind load fatigue testing equipment as described in claim 1, characterized in that, The bottom of the box is provided with a second through hole, and the fixing frame is provided with a second guide rod. The second guide rod can slide through the second through hole, and the magnet connecting plate is provided at the upper end of the second guide rod.

4. The LED signboard wind load fatigue testing equipment as described in claim 3, characterized in that, The fixing frame includes a fixing plate and multiple fixing rods, the multiple fixing rods being connected to the fixing plate respectively, and the lower end of the second guide rod being connected to the fixing plate; The sandbag bin is equipped with multiple connecting rods, and each connecting rod is connected to each of the fixed rods in a one-to-one correspondence.

5. The LED signboard wind load fatigue testing equipment as described in claim 1, characterized in that, The base is provided with a pad, and the LED sign is set on the pad.

6. The LED signboard wind load fatigue testing equipment as described in claim 5, characterized in that, The pad has an arc-shaped groove, and the pillar on the back of the LED sign is placed in the arc-shaped groove; It also includes a locking block, which can be fixedly connected to the pad block.

7. The LED signboard wind load fatigue testing equipment as described in claim 1, characterized in that, The upper end of the frame is provided with a crossbeam, and the drive mechanism is movably mounted on the crossbeam.

8. The LED signboard wind load fatigue testing equipment as described in claim 7, characterized in that, The lower end of the box is provided with a connecting hole, and the crossbeam is provided with a connecting groove. The connecting groove extends along the length of the crossbeam, and the connecting hole corresponds to the connecting groove.

9. The LED signboard wind load fatigue testing equipment as described in claim 1, characterized in that, Both the magnet connecting plate and the electromagnetic chuck are disc-shaped. The piston rod of the driving cylinder is connected to the center of the electromagnetic chuck. The center of the magnet connecting plate is provided with a clearance hole, and the piston rod of the driving cylinder extends into the clearance hole.

10. The LED signboard wind load fatigue testing equipment as described in claim 1, characterized in that, It also includes an electrical control box, which is electrically connected to the drive mechanism, and the electrical control box has a touch screen, a control switch and an emergency stop button.

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