Cable bridge teaching aid convenient to assemble

Abstract

The utility model relates to the technical field of cable-stayed bridge teaching aids, in particular to a cable-stayed bridge teaching aid convenient to assemble, which comprises a bridge body side rod, tripod side rods are arranged at two end parts of the outer side surface of the bridge body side rod, and a first inclined rod and a second inclined rod are respectively arranged at two end parts of the outer side surface of each tripod side rod. The lower portions of the surfaces of one sides of the first inclined rod and the second inclined rod are each provided with a lower supporting rod, a middle fixing rod is arranged in the middle of the surface of the bottom end of the bridge body side rod, and hemp ropes are wound around the surfaces of the two ends of the middle fixing rod and the two ends of the upper supporting rods. Compared with a traditional connecting mode, the mechanical design table has the advantages that the mechanical design table is integrally applicable to practical practice on a table top, the mechanical design table is convenient to disassemble and assemble, the building time is greatly shortened, rapid machining and overall transportation are facilitated, the overall size is large, safety and firmness can be achieved, a user can feel charm of mechanical design, and the user can feel charm of the mechanical design.

Description

Technical Field

[0001] This utility model relates to the field of cable-stayed bridge teaching aids, and in particular to a cable-stayed bridge teaching aid that is easy to assemble. Background Technology

[0002] A search of existing Chinese patent document CN216474451U discloses a novel cable-stayed bridge structure for bridge engineering, comprising a bridge body, a bridge tower fixed in the middle of the bridge body, the bridge body and the bridge tower being arranged in a cross shape, and upper and lower cables connecting the upper end of the bridge body to the left and right sides of the bridge tower. A cavity is formed in the bridge body, and the lower cable is disposed in the cavity. A fixing rod is fixed to the left end face of the cavity, and a tension rod is provided on the right side of the fixing rod, with its right end connected to the left end of the lower cable. Threaded rods are symmetrically arranged on the opposite end faces of the fixing rod and the tension rod. Threaded sleeves are rotatably installed around the threaded rods, and the left and right threaded sleeves are connected and fixed together by a connecting rod. This device facilitates the adjustment of the cable stays and prevents corrosion at the connection between the cable stays and the fixing rod.

[0003] As one of the oldest forms of bridge construction, the prototype of the cable-stayed bridge can be traced back to the primitive cable-stayed bridges built with bamboo ropes and rattan in southwestern China before the Common Era. The Luding Bridge (built in 1706) during the Ming and Qing Dynasties is a prime example of ancient cable-stayed bridge engineering. Currently, existing hand-assembled cable-stayed bridge models lack large-scale, detachable models, making it impossible to provide a realistic bridge-building experience and thus failing to meet teaching and practical needs. Furthermore, the structures of most existing products are fixed and lack flexibility, making repeated assembly and disassembly difficult for teaching demonstrations and experiments. In addition, some modular bridge models, due to their complex structures and cumbersome connection methods, result in lengthy assembly processes, making them unsuitable for short-term teaching experiments. Moreover, wooden materials are prone to mechanical damage during repeated assembly and disassembly, especially at grooved and connecting parts, which may lead to structural loosening with long-term use, thus affecting teaching effectiveness and lifespan. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the defects of the prior art and provide a cable-stayed bridge teaching aid that is easy to assemble. It aims to solve the technical problem that the current existing manual cable-stayed bridge building products lack large-scale detachable models, which makes it impossible to provide a real bridge building experience and thus makes it difficult to meet the needs of teaching and practice.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0006] This utility model discloses an easy-to-assemble cable-stayed bridge teaching aid, comprising two sets of bridge side poles arranged symmetrically from left to right. Multiple foot pedals are provided on the top surface of each side pole. Tripod side poles are provided at both ends of the outer surface of each side pole, and inclined support rods are provided at both ends of the bottom surface of each side pole. A first and a second inclined rod are respectively provided at both ends of the outer surface of the tripod side pole, with their upper parts arranged in a cross configuration. The intersection of the first and second inclined rods is fixed by threaded rods. Upper support rods are provided on both sides of the intersection of the first and second inclined rods. Lower support rods are provided on the lower part of one side of each of the first and second inclined rods. A central fixing rod is provided in the middle of the bottom surface of each side pole, and hemp rope is wrapped around both ends of the central fixing rod and both ends of the upper support rod.

[0007] As a further description of the above technical solution:

[0008] The bridge side rods are set up as two sets of rectangular rods, and the foot pedals are arranged sequentially to the top surface of the bridge side rods and fixed by screws. The bridge side rods and the diagonal support rods are fixed by screws, and there are two sets of diagonal support rods. The diagonal support rods are installed at an angle, and the two ends of the diagonal support rods are fixed to the bottom surfaces of the left and right bridge side rods respectively.

[0009] As a further description of the above technical solution:

[0010] The bridge side rods and tripod side rods are connected and fixed by screws, and there are four sets of tripod side rods, which are respectively placed at both ends of the outer surface of the two sets of bridge side rods.

[0011] As a further description of the above technical solution:

[0012] The tripod side rod is connected and fixed to the first and second diagonal rods by threaded rods. The tripod side rod, the first diagonal rod, and the second diagonal rod together form a triangular bridge tower structure. The included angle of the triangular bridge tower structure is set at 30°, 75°, and 75°, with two sets in total.

[0013] As a further description of the above technical solution:

[0014] The first and second diagonal braces are fixed to the upper and lower support rods by screws, and there are four upper and four lower support rods. The bridge side rods and the middle fixing rods are fixed to the bridge body by screws, and there are two sets of middle fixing rods.

[0015] As a further description of the above technical solution:

[0016] The hemp rope is spliced ​​and assembled with the upper support rod and the middle fixing rod, and there are multiple hemp ropes. The knotting methods of the hemp rope include double loop knot and figure-eight knot, and the hemp rope as a whole is set as a triangular cable structure.

[0017] This utility model has the following beneficial effects:

[0018] This utility model, through hands-on practice on a desktop, is easy to assemble and disassemble. Compared with traditional connection methods, it significantly shortens the assembly time, facilitates rapid processing and overall transportation, and has a large overall size, ensuring safety and sturdiness. It allows users to experience the charm of mechanical design. Attached Figure Description

[0019] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a front view schematic diagram of the triangular bridge tower structure of this utility model;

[0022] Figure 3 This is a left-side view of the triangular bridge tower structure of this utility model;

[0023] Figure 4 This is a front view schematic diagram of the overall structure of this utility model;

[0024] Figure 5 This is a front view and top view schematic diagram of the overall structure of this utility model;

[0025] In the diagram: 1. Bridge side bar; 2. Foot pedal; 3. Tripod side bar; 4. Diagonal support bar; 5. First diagonal bar; 6. Second diagonal bar; 7. Threaded bar; 8. Upper support bar; 9. Lower support bar; 10. Middle fixing bar; 11. Hemp rope. Detailed Implementation

[0026] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0027] In the attached diagram, all identical reference numerals refer to the same components.

[0028] Example 1

[0029] Reference Figure 1-5This utility model provides an embodiment of a cable-stayed bridge teaching aid that is easy to assemble, including a bridge side rod 1. The bridge side rod 1 is arranged in two sets symmetrically on the left and right, and multiple sets of foot pedals 2 are provided on the top surface of the bridge side rod 1. Tripod side rods 3 are provided at both ends of the outer surface of the bridge side rod 1, and inclined support rods 4 are provided at both ends of the bottom surface of the bridge side rod 1. The first inclined rod 5 and the second inclined rod 6 are respectively provided at both ends of the outer surface of the tripod side rod 3, and the upper parts of the first inclined rod 5 and the second inclined rod 6 are arranged in a cross shape. The upper intersection of the first inclined rod 5 and the second inclined rod 6 is fixed by threaded rods 7. Upper support rods 8 are provided on both sides of the intersection of the first inclined rod 5 and the second inclined rod 6. Lower support rods 9 are provided on the lower part of one side of the first inclined rod 5 and the second inclined rod 6. A middle fixing rod 10 is provided in the middle of the bottom surface of the bridge side rod 1, and hemp rope 11 is wrapped around both ends of the middle fixing rod 10 and both ends of the upper support rod 8.

[0030] The bridge side rod 1 consists of two sets of rectangular rods, and the foot pedals 2 are arranged sequentially to the top surface of the bridge side rod 1 and fixed by screws. The bridge side rod 1 and the diagonal support rod 4 are fixed by screws, and there are two sets of diagonal support rods 4. The diagonal support rods 4 are installed at an angle, and the two ends of the diagonal support rods 4 are fixed to the bottom surfaces of the left and right bridge side rods 1 respectively.

[0031] The bridge side rod 1 and the tripod side rod 3 are connected and fixed by screws, and there are four sets of tripod side rods 3, which are respectively placed at the two ends of the outer surface of the two sets of bridge side rods 1.

[0032] The tripod side rod 3 is connected and fixed to the first diagonal rod 5 and the second diagonal rod 6 by threaded rod 7. The tripod side rod 3, the first diagonal rod 5 and the second diagonal rod 6 together form a triangular bridge tower structure, and the included angle of the triangular bridge tower structure is set at 30°, 75° and 75°, with two as a group, for a total of two groups.

[0033] The first diagonal rod 5 and the second diagonal rod 6 are both connected and fixed to the upper support rod 8 and the lower support rod 9 by screws. The upper support rod 8 and the lower support rod 9 are both set in groups of four. The bridge side rod 1 and the middle fixing rod 10 are connected and fixed by screws. The middle fixing rod 10 is set in two groups.

[0034] The hemp rope 11 is spliced ​​and assembled with the upper support rod 8 and the middle fixing rod 10. The hemp rope 11 is made up of multiple strands. The knotting methods of the hemp rope 11 include double loop knot and figure-eight knot. The hemp rope 11 is set as a triangular cable structure.

[0035] Specifically, its structure consists of a bridge side rod 1, foot pedal 2, tripod side rod 3, inclined support rod 4, first inclined rod 5, second inclined rod 6, threaded rod 7, upper support rod 8, lower support rod 9, middle fixing rod 10, and hemp rope 11, forming an easily assembled cable-stayed bridge teaching aid. The easily assembled cable-stayed bridge teaching aid is composed of a platform formed by the bridge side rod 1 and foot pedal 2, a triangular bridge tower structure formed by the tripod side rod 3, first inclined rod 5, second inclined rod 6, threaded rod 7, upper support rod 8, and lower support rod 9, and a triangular cable structure formed by multiple hemp ropes 11. The inclined support rod 4 supports both ends of the bottom surface of the bridge side rod 1, and the middle fixing rod 10 supports and fixes the middle of the bottom surface of the bridge side rod 1. The threaded rod 7 makes the triangular bridge tower structure more stable, so that the easily assembled cable-stayed bridge teaching aid is symmetrical at both ends, ensuring overall stability. At the same time, the whole is easy to assemble and disassemble, effectively shortening the construction time and improving hands-on ability. Firstly, the easily assembled cable-stayed bridge teaching aid's towers consist of four sets of triangular tower structures. Each set is formed by the intersection of a first diagonal member 5, a second diagonal member 6, and a tripod side member 3, all secured with threaded rods 7 to ensure bridge stability. The top is clamped and fixed by two upper support rods 8, enhancing tower rigidity and overall stability. A square base is installed at the bottom, with an additional diagonal support rod 4 internally for diagonal fixation, improving structural strength and torsional resistance. In the bridge deck structure, two bridge side members 1 serve as the transverse main beams at the bottom, providing stable foundation support and forming the bridge deck support frame. The bridge deck is fully covered with footboards 2 and fixed with screws to improve its load-bearing capacity. Regarding the main cable and suspenders, the main cable is fixed to the top of the tower, providing the main load-bearing capacity and forming the basic load-bearing system. The suspenders connect the main cable and the bridge deck, are evenly distributed, adjust the deck's flatness, and balance the load-bearing capacity.

[0036] The assembly steps for the easy-to-assemble cable-stayed bridge teaching aid are as follows:

[0037] Step 1: Construct the triangular bridge tower structure, using the first diagonal brace 5 and the second diagonal brace 6 as the hypotenuse support of the triangle. A tripod side brace 3 is used as the base of the triangle, with a threaded rod 6 passing through the intersection point and secured with bolts and screws to form a stable triangular bridge tower. The bridge tower employs a triangular structure with specific angles: 30°, 75°, and 75°. The 30° angle enhances the tower's anti-tilting ability, while the 75° angle optimizes force transmission, making it easier for the main cable to maintain a balanced stress state after tensioning. This optimized design effectively improves the overall stability of the bridge, reduces lateral sway, and ensures a more stable structure after construction. Furthermore, this invention includes pre-set marking lines or limiting blocks on the bridge tower timber to assist builders in quickly positioning and achieving the designed angle. The marking lines guide components to the optimal position, while the limiting blocks provide physical restraint. This design makes the construction process more intuitive and efficient, reduces assembly difficulty, and allows even students, beginners, or inexperienced personnel to successfully complete the construction.

[0038] Step Two: During the reinforcement and lateral connection of the bridge towers, a diagonal bracing rod 4 is added within the square base of the two sets of triangular bridge tower structures. It is fixed diagonally using screws or threaded rods 7 to improve the stability of the bridge towers. For the lateral connection of the bridge towers, two side beams 1 are taken and connected to the bottom of the two sets of bridge towers, serving as the main beam base of the bridge. Below these, two central fixing rods 10 are vertically placed, using screws or threaded rods 7 to ensure a tight fit, serving as the bottom support beam of the bridge base. At this point, the bridge base structure is complete.

[0039] Step 3: Evenly lay multiple foot pedals 2 on the completed base structure to form a complete bridge surface. The foot pedals 2 are arranged closely together and fixed with screws.

[0040] Step Four: Finally, use hemp rope 11 as the main cable and secure it to the top of the bridge tower. The main cable bears the main load of the bridge, forming the main structure, and the construction is complete. The installation method for hemp rope 11 is as follows:

[0041] The starting point of each hemp rope 11 is fixed to the upper support rod 8. One end of each rope 11 is first fixed to the outside of the upper support rod 8 at the top of the bridge tower, using a double loop knot or figure-eight knot to ensure it does not slip during stress. It is pulled diagonally downwards and passes through the tower structure. The rope 11 passes diagonally downwards from the upper support rod 8 through the triangular opening area formed between the triangular bridge tower structures to ensure unobstructed flow and reasonable stress direction. It is then uniformly connected to both ends of the fixed rod 10 in the middle of the bridge deck. All the ropes 11 are ultimately connected to the two fixed rods 10 in the middle of the bridge deck. Multiple ropes 11 on each side of the bridge tower converge downwards and are fixed at the fixed rods 10 in the middle of the bridge deck, forming a triangular cable suspension system. The method of fixing the rope 11 is as follows: the rope 11 is wrapped around the fixed rod 10 in the middle twice and then tightened with a knot. If there are pre-reserved holes, the holes can be made first and then knotted on both sides. The fixing position of each rope 11 should be symmetrical from left to right and balanced from front to back to ensure that the bridge deck does not tilt or twist. After tension adjustment and connection, the hemp ropes 11 are manually tensioned simultaneously from both sides to suspend the bridge deck and maintain a balanced distribution of cable forces between the bridge towers. Limiting slots or knot positioning marks can be used to control the length and angle of each hemp rope 11, ensuring the final bridge deck remains level, flat, and stable. The easily assembled cable-stayed bridge teaching aid uses only the upper support rod 8 and the middle fixed rod 10 to form the main cable system, making operation convenient, the structure clear, and easy for teaching demonstrations. All hemp ropes 11 are connected only to the middle of the bridge deck, avoiding errors caused by multiple scattered binding points and ensuring concentrated tension and bridge deck stability. In the tower structure design, the first diagonal rod 5 and the second diagonal rod 6, in conjunction with the angle between the bridge deck hemp ropes 11, naturally form a triangular force system, improving the structure's resistance to lateral tilting. Pre-defined positioning marks are provided on the middle fixed rod 10 and the upper support rod 8 to guide operators to quickly wind the ropes and maintain a consistent angle, significantly improving assembly efficiency and consistency.

[0042] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A cable-stayed bridge teaching aid that is easy to assemble, comprising bridge side bars (1), characterized in that, The bridge side rods (1) are arranged in two sets symmetrically on the left and right, and multiple sets of foot pedals (2) are provided on the top surface of the bridge side rods (1). Tripod side rods (3) are provided at both ends of the outer surface of the bridge side rods (1), and diagonal support rods (4) are provided at both ends of the bottom surface of the bridge side rods (1). The first diagonal rod (5) and the second diagonal rod (6) are respectively provided at both ends of the outer surface of the tripod side rod (3), and the upper parts of the first diagonal rod (5) and the second diagonal rod (6) are arranged in a cross shape. The upper intersection of the first diagonal bar (5) and the second diagonal bar (6) is fixed by threaded rod (7), and upper support rods (8) are provided on both sides of the intersection of the first diagonal bar (5) and the second diagonal bar (6). Lower support rods (9) are provided on the lower part of one side of the first diagonal bar (5) and the second diagonal bar (6). A middle fixing rod (10) is provided in the middle of the bottom surface of the bridge side bar (1), and hemp rope (11) is wrapped around both ends of the middle fixing rod (10) and both ends of the upper support rod (8).

2. The cable-stayed bridge teaching aid according to claim 1, characterized in that, The bridge side rod (1) is set in two sets of rectangular rods, and the foot pedal (2) is arranged sequentially on the top surface of the bridge side rod (1) and fixed by screws. The bridge side rod (1) and the inclined support rod (4) are fixed by screws, and there are two sets of inclined support rods (4). The inclined support rod (4) is installed at an angle, and its two ends are fixed to the bottom surfaces of the left and right bridge side rods (1) respectively.

3. The cable-stayed bridge teaching aid according to claim 1, characterized in that, The bridge side rod (1) and the tripod side rod (3) are connected and fixed by screws, and the tripod side rod (3) is set in four groups, which are respectively placed at the two ends of the outer surface of the two groups of bridge side rods (1).

4. The easily assembled cable-stayed bridge teaching aid according to claim 1, characterized in that, The tripod side rod (3) is connected and fixed to the first diagonal rod (5) and the second diagonal rod (6) by a threaded rod (7). The tripod side rod (3), the first diagonal rod (5) and the second diagonal rod (6) together form a triangular bridge tower structure. The included angle of the triangular bridge tower structure is set at 30°, 75° and 75°, with two as a group, for a total of two groups.

5. The easily assembled cable-stayed bridge teaching aid according to claim 1, characterized in that, The first diagonal rod (5) and the second diagonal rod (6) are all fixed to the upper support rod (8) and the lower support rod (9) by screws, and the upper support rod (8) and the lower support rod (9) are both set in fours. The bridge side rod (1) and the middle fixing rod (10) are fixed to each other by screws, and the middle fixing rod (10) is set in two sets.

6. The easily assembled cable-stayed bridge teaching aid according to claim 1, characterized in that, The hemp rope (11) is spliced ​​and assembled with the upper support rod (8) and the middle fixing rod (10), and there are multiple hemp ropes (11). The knotting methods of the hemp rope (11) include double loop knot and figure-eight knot, and the hemp rope (11) as a whole is set as a triangular cable structure.

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