Folding Road Surface Smoothness Measurement Wheel Set

Abstract

This utility model relates to the field of surveying wheel sets and discloses a foldable road surface evenness surveying wheel set, including a first support frame. A mounting frame is fixedly connected to the bottom of the first support frame. A movable wheel is installed inside the mounting frame. A mounting platform is fixedly connected to the top of the first support frame. A fixed column is fixedly connected to the inner wall of the mounting platform. A movable sleeve is rotatably connected to the surface of the fixed column. A connecting platform is fixedly connected to the surface of the movable sleeve. A second support frame is fixedly connected to the bottom of the connecting platform. An electric push rod is installed inside the first support frame. This utility model, by setting an electric push rod, a plug rod, a slot, and a locking strip, allows the electric push rod to retract during folding, causing the plug rod to slide along the locking strip, completely disengaging the plug rod from the second support frame. The second support frame can then rotate upwards around the fixed column and fit against the first support frame, allowing the surveying wheel set to be symmetrically folded, reducing the space occupied during transportation.

Description

Technical Field

[0001] This utility model relates to the field of survey wheel sets, specifically a foldable road surface evenness survey wheel set. Background Technology

[0002] The test wheel set, also known as an eight-wheel smoothness meter, is a professional road surface inspection device. It is mainly used for the construction acceptance and maintenance inspection of high-grade highways, urban roads and airport runways. It continuously collects road surface data through an eight-wheel structure, automatically calculates and outputs indicators such as the standard deviation of smoothness, cumulative value and curve area, and has the characteristics of high measurement accuracy and fast speed.

[0003] The support frame of the eight-wheel flatness tester is an integrated welded casting. Because it needs to be used on multiple wheels, the overall diameter of the device is relatively long. Therefore, it requires a lot of space during transportation, which makes it inconvenient to transport. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a foldable road surface evenness measuring wheel set, including a first support frame, a mounting frame fixedly connected to the bottom of the first support frame, a movable wheel installed inside the mounting frame, a mounting platform fixedly connected to the top of the first support frame, a fixed column fixedly connected to the inner wall of the mounting platform, a movable sleeve rotatably connected to the surface of the fixed column, a connecting platform fixedly connected to the surface of the movable sleeve, a second support frame fixedly connected to the bottom of the connecting platform, an electric push rod installed inside the first support frame, an insertion rod fixedly connected to the output end of the electric push rod, a retaining strip fixedly connected to the inner wall of the second support frame, a retaining groove formed on the surface of the insertion rod, and a stop plate fixedly connected to the end of the second support frame near the first support frame.

[0005] The above technical solution involves setting an electric push rod in the first support frame, setting a locking strip in the second support frame, and opening a slot on the insert rod that matches the locking strip. At the same time, the second support frame is rotated relative to the first support frame by using a fixed column and a movable sleeve. When folding, the electric push rod retracts, which allows the insert rod to slide out of the second support frame along the locking strip. The second support frame then flips upward around the fixed column to complete the folding operation.

[0006] As a further improvement to the above solution, the bottoms of the first support frame and the second support frame are located on the same plane.

[0007] Through the above technical solution, the bottoms of the first support frame and the second support frame are coplanar, so that the two wheel sets contact the road surface simultaneously after unfolding, avoiding measurement errors caused by height differences and ensuring that the flatness data truly reflects the road surface condition.

[0008] As a further improvement to the above solution, two card slots are provided, which are symmetrically and evenly distributed on the surface with respect to the center of the right end surface of the insertion rod, and the card slots are adapted to the card strip.

[0009] Through the above technical solution, the two symmetrically distributed slots on the surface of the insertion rod cooperate with the locking strip to form a bidirectional symmetrical guide, so that the force is evenly distributed during the insertion and removal process, and the insertion rod is prevented from being worn or stuck.

[0010] As a further improvement to the above solution, the end of the abutment away from the second support frame is in contact with the right end of the first support frame.

[0011] Through the above technical solution, the end face of the abutment plate directly contacts the right end of the first support frame, forming an end face positioning, preventing the second support frame from continuing to rotate downwards, quickly determining that the unfolding angle is zero, and ensuring that the unfolding position is consistent each time.

[0012] As a further improvement to the above solution, a mounting plate is fixedly connected to the bottom of the first support frame, a threaded sleeve is fixedly connected to the bottom of the mounting plate, a threaded rod is threadedly connected inside the threaded sleeve, a throttle is fixedly connected to the bottom of the threaded rod, and a threaded hole is opened on the top of the abutment plate.

[0013] Through the above technical solution, the mounting plate, threaded sleeve, threaded rod, throttle, and threaded hole of the abutment plate constitute an auxiliary locking pair. When the abutment plate is in contact with the end face of the first support frame, the threaded rod is simultaneously screwed into the threaded sleeve and the threaded hole, pulling the first support frame and the second support frame together, eliminating the slight sway caused by the gap of the folding hinge, and limiting the movement of the insertion rod driven by the electric push rod.

[0014] As a further improvement to the above solution, the number of threaded sleeves is set to two, and the two threaded sleeves are centrally symmetrically distributed around the bottom of the mounting plate.

[0015] With the above technical solution, the two threaded sleeves are arranged symmetrically at the center, so that the locking force of the threaded rod is symmetrically distributed along the mounting plate, avoiding the twisting of the mounting plate caused by unilateral force, and ensuring that the structure is under balanced force after locking.

[0016] As a further improvement to the above solution, the threaded rod penetrates the mounting plate, and the threaded rod is threadedly connected to the interior of the threaded hole.

[0017] Compared with the prior art, the beneficial effects of this utility model are: This utility model incorporates an electric push rod, an insert rod, a slot, and a locking strip. During folding, the electric push rod retracts, causing the insert rod to slide along the locking strip, allowing the insert rod to completely exit from the second support frame. The second support frame can then rotate upwards around the fixed column and fit against the first support frame, enabling the measuring wheel set to be symmetrically folded, thus reducing the space occupied during transportation.

[0018] This utility model, by setting a threaded rod, a threaded sleeve, and a stop plate, allows the stop plate to fit against the end face of the first support frame when unfolded. Rotating the threaded rod causes it to simultaneously screw into the threaded holes of the threaded sleeve and the stop plate, forming a rigid connection. This eliminates the shaking between the first and second support frames during measurement and limits the insertion of the insertion rod into the second support frame, preventing offset when the electric push rod moves the insertion rod into the first support frame. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic cross-sectional view of the overall structure of this utility model; Figure 3 This is a schematic diagram of the disassembled structure of the first support frame and the second support frame of this utility model; Figure 4 This utility model Figure 3 Enlarged structural diagram at point A.

[0020] In the diagram: 1. First support frame; 2. Mounting frame; 3. Casters; 4. Mounting platform; 5. Fixed column; 6. Movable sleeve; 7. Connecting platform; 8. Second support frame; 9. Electric push rod; 10. Insert rod; 11. Locking strip; 12. Locking groove; 13. Support plate; 14. Mounting plate; 15. Threaded sleeve; 16. Threaded rod; 17. Turning handle; 18. Threaded hole. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0022] Example: Please combine Figure 1-4 The foldable road surface evenness measuring wheel set of this embodiment includes a first support frame 1, a mounting frame 2 fixedly connected to the bottom of the first support frame 1, a movable wheel 3 installed inside the mounting frame 2, a mounting platform 4 fixedly connected to the top of the first support frame 1, a fixed column 5 fixedly connected to the inner wall of the mounting platform 4, a movable sleeve 6 rotatably connected to the surface of the fixed column 5, a connecting platform 7 fixedly connected to the surface of the movable sleeve 6, a second support frame 8 fixedly connected to the bottom of the connecting platform 7, an electric push rod 9 installed inside the first support frame 1, an insertion rod 10 fixedly connected to the output end of the electric push rod 9, a retaining strip 11 fixedly connected to the inner wall of the second support frame 8, a retaining groove 12 opened on the surface of the insertion rod 10, and a stop plate 13 fixedly connected to the end of the second support frame 8 near the first support frame 1.

[0023] When folding, the electric push rod 9 is activated. The output end of the electric push rod 9 drives the slot 12 on the surface of the insertion rod 10 to slide on the surface of the clip 11 until the insertion rod 10 disengages from the inside of the second support frame 8. The second support frame 8 is pushed upward, causing the connecting platform 7 at the top of the second support frame 8 to rotate around the center of the fixed column 5 until the top of the connecting platform 7 contacts the top of the first support frame 1. At this time, the folding of the entire device is completed.

[0024] The bottoms of the first support frame 1 and the second support frame 8 are located on the same plane to avoid height deviation after the first support frame 1 and the second support frame 2 are unfolded.

[0025] There are two slots 12. The two slots 12 are evenly distributed on the surface with the center of the right end surface of the insertion rod 10 symmetrically. The slots 12 are adapted to the locking strip 11 so that the insertion rod 10 can be stably inserted into the inside of the second support frame 8.

[0026] The end of the abutment 13 away from the second support frame 8 contacts the right end of the first support frame 1, thus limiting the rotation of the second support frame 8.

[0027] The bottom of the first support frame 1 is fixedly connected to a mounting plate 14, the bottom of the mounting plate 14 is fixedly connected to a threaded sleeve 15, the threaded sleeve 15 is internally threaded to a threaded rod 16, the bottom of the threaded rod 16 is fixedly connected to a handle 17, and the top of the abutment plate 13 is provided with a threaded hole 18.

[0028] By setting up a threaded rod 16, a threaded sleeve 15, and a stop plate 13, when unfolded, the stop plate 13 fits against the end face of the first support frame 1. The threaded rod 16 is rotated so that it is simultaneously screwed into the threaded hole 18 of the threaded sleeve 15 and the stop plate 13, forming a rigid connection. This eliminates the shaking between the first support frame 1 and the second support frame 8 during the measurement process. At the same time, it limits the insertion of the insertion rod 10 inside the second support frame 8, preventing the electric push rod 9 from driving the insertion rod 10 to move and insert into the first support frame 1, thus avoiding deviation.

[0029] There are two threaded sleeves 15, which are symmetrically distributed around the bottom of the mounting plate 14.

[0030] The threaded rod 16 passes through the mounting plate 14, and the threaded rod 16 is threaded into the interior of the threaded hole 18.

[0031] The implementation principle of the foldable road surface evenness measuring wheel group in this application embodiment is as follows: when the eight-wheel evenness instrument is folded, the threaded rod 16 is first rotated by the throttle 17, so that the threaded rod 16 rotates inside the threaded sleeve 15, and the threaded rod 16 disengages from the inside of the threaded hole 18 at the same time.

[0032] Start the electric push rod 9. The output end of the electric push rod 9 drives the slot 12 on the surface of the insertion rod 10 to slide on the surface of the clip 11 until the insertion rod 10 disengages from the inside of the second support frame 8. Push the second support frame 8 upward so that the connecting platform 7 at the top of the second support frame 8 rotates around the center of the fixed column 5 until the top of the connecting platform 7 contacts the top of the first support frame 1. At this time, the overall device is folded.

[0033] When in use, rotate the second support frame 8 around the fixed column 5 so that the abutment 13 contacts the right end of the first support frame 1. Rotate the threaded rod 16 by turning the handle 17. The threaded rod 16 is threaded into the threaded hole 18 and limits the connection between the first support frame 1 and the second support frame 8. Start the electric push rod 9. The output end of the electric push rod 9 drives the insertion rod 10 to approach the second support frame 8 until the slot 12 on the surface of the insertion rod 10 slides into the inside of the locking strip 11. The whole device unfolds and can be used for subsequent measurement work.

[0034] 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 folding road surface evenness measuring wheel set, characterized in that: The first support frame (1) is fixedly connected to the bottom of the first support frame (1), and the mounting frame (2) is equipped with a moving wheel (3). The top of the first support frame (1) is fixedly connected to the mounting platform (4), and the inner wall of the mounting platform (4) is fixedly connected to the fixing column (5). The surface of the fixing column (5) is rotatably connected to the movable sleeve (6), and the surface of the movable sleeve (6) is fixedly connected to the connecting platform (7). The bottom of the connecting platform (7) is fixedly connected to the second support frame (8). The first support frame (1) is equipped with an electric push rod (9), and the output end of the electric push rod (9) is fixedly connected to the insertion rod (10). The inner wall of the second support frame (8) is fixedly connected to the retaining strip (11), and the surface of the insertion rod (10) is provided with a retaining groove (12). The end of the second support frame (8) near the first support frame (1) is fixedly connected to the abutment plate (13).

2. The foldable road surface evenness measuring wheel set according to claim 1, characterized in that: The bottoms of the first support frame (1) and the second support frame (8) are located on the same plane.

3. The foldable road surface evenness measuring wheel set according to claim 1, characterized in that: There are two slots (12). The two slots (12) are evenly distributed on the surface with the center of the right end of the insert (10) symmetrically. The slots (12) are adapted to the card strip (11).

4. The foldable road surface evenness measuring wheel set according to claim 1, characterized in that: The end of the abutment (13) away from the second support frame (8) is in contact with the right end of the first support frame (1).

5. The foldable road surface evenness measuring wheel set according to claim 1, characterized in that: The bottom of the first support frame (1) is fixedly connected to an installation plate (14), the bottom of the installation plate (14) is fixedly connected to a threaded sleeve (15), the threaded sleeve (15) is internally threaded to a threaded rod (16), the bottom of the threaded rod (16) is fixedly connected to a throttle (17), and the top of the abutment plate (13) is provided with a threaded hole (18).

6. The foldable road surface evenness measuring wheel set according to claim 5, characterized in that: The number of the threaded sleeves (15) is set to two, and the two threaded sleeves (15) are centrally symmetrically distributed around the bottom of the mounting plate (14).

7. The foldable road surface evenness measuring wheel set according to claim 5, characterized in that: The threaded rod (16) passes through the mounting plate (14), and the threaded rod (16) is threaded into the interior of the threaded hole (18).

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