Paddle strength detection device
By designing a fixing clamp and tension loading assembly that can adapt to different sizes and specifications of propellers, the problems of complex structure and limited applicability of existing testing devices have been solved, achieving efficient and accurate propeller strength testing and reducing costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WEIHAI PINGHE COMPOSITE MATERIAL PROD CO LTD
- Filing Date
- 2025-05-27
- Publication Date
- 2026-04-24
AI Technical Summary
Existing propeller strength testing devices are complex in structure, have a limited range of applications, and are difficult to accurately control the tensile force and record values, which affects testing efficiency and accuracy.
A testing device including a workbench, a fixing clamp, and a tension loading component was designed. The oar is fixed by a combination of a support rod and a fixing clamp. The strength of the connection between the oar plate and the oar handle is tested by the tension loading component. The support rod is at the same angle as the oar handle and the oar plate to ensure the consistency of the force direction and adapt to oars of different sizes and specifications.
It improves the accuracy and efficiency of detection data, reduces detection costs, adapts to oars of different sizes and specifications, has a simple structure, and is easy to apply on a large scale.
Smart Images
Figure CN224163469U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of oar testing device technology, and more specifically, to an oar strength testing device. Background Technology
[0002] Rowing is a popular water sport in which one or more rowers sit in a rowing boat and propel it with oars. The oars continuously push the water, changing the water flow and using the reaction force of the water to propel the boat forward. The basic structure of an oar consists of two parts: the handle and the blade. The handle is held by the user to apply force, while the blade is the part that comes into contact with the water and generates propulsion. By paddling, the reaction force generated by the water flow propels the rowing boat forward. Because the force generated by the paddling action acts directly on the oar, the connection between the handle and the blade not only needs to be secure but also needs to have sufficient strength to ensure the safety of rowing. Therefore, oars undergo rigorous strength testing before leaving the factory.
[0003] Currently, existing propeller strength testing devices have relatively simple fixing structures, mostly consisting of two-point fixation. This makes them unable to adjust for different parts of the propeller, such as the propeller handle and blade, which have varying shapes and structures. Their functionality is limited, and their applicability is narrow. Furthermore, some testing devices use hydraulic or electric drive mechanisms to apply tension. While this allows for automated tension application, the equipment is expensive, structurally complex, difficult to maintain, and has a cumbersome operating procedure. Meanwhile, some existing simple testing devices struggle to accurately control the tension magnitude and record tension values in real time, affecting testing efficiency and accuracy. Utility Model Content
[0004] To address the aforementioned problems, the present invention provides a paddle strength testing device, which solves the issues of complex structure and limited applicability of existing paddle testing devices. The device includes a workbench, which is a cuboid frame structure. A first fixing rod is located on the bottom surface of the workbench, and a second fixing rod is located on one side of the workbench. A support rod for placing the paddle is located between the first and second fixing rods. The first fixing rod has a first fixing clamp, the second fixing rod has a second fixing clamp, and a third fixing clamp is slidably connected to the support rod. The first and second fixing clamps cooperate to fix the handle end of the paddle handle, and the first and third fixing clamps cooperate to fix the other end of the paddle handle. A tension loading assembly connected to the paddle is located on the top surface of the workbench, and a tension measuring gauge is connected to the force-applying end of the tension loading assembly.
[0005] Preferably, the angle between the support rod and the first fixed rod is the same as the angle between the propeller handle and the propeller plate.
[0006] Preferably, the upper surface of the support rod is arc-shaped to match the propeller handle.
[0007] Preferably, the workbench includes four parallel and vertically arranged columns, with the tops of adjacent columns connected by an upper crossbeam and the bottoms of adjacent columns connected by a lower crossbeam; a first fixing rod is provided between two lower crossbeams arranged along the length of the workbench, and a second fixing rod is provided between two adjacent columns, with the first fixing rod and the second fixing rod arranged in parallel.
[0008] Preferably, a mounting rod is provided between the two upper crossbeams arranged along the length of the workbench, and the mounting rod is provided with a hanging ring that is connected to the tension loading component.
[0009] Preferably, the tension loading assembly includes a double-hook tensioner connected to the hanging ring, a connecting block connected to the free end of the double-hook tensioner, the connecting block being connected to the measuring end of the tension gauge, and a hook at the bottom of the connecting block being connected to the paddle.
[0010] Preferably, the first fixing rod is located in the middle of the lower crossbeam arranged along the length of the worktable, and the mounting rod is located at the end of the upper crossbeam arranged along the length of the worktable away from the support rod.
[0011] Preferably, the first fixing clamp and the second fixing clamp are metal clamps welded to the first fixing rod and the second fixing rod respectively, and the third fixing clamp is a metal clamp with its bottom welded to the sliding sleeve, and the sliding sleeve is slidably connected to the support rod.
[0012] The beneficial effects of this utility model are as follows: A first fixed rod and a second fixed rod are provided on the worktable, and a support rod is provided between the first and second fixed rods, providing stable support for the oar. The first fixed rod, the second fixed rod, and the support rod facilitate quick positioning of the oar handle during installation, improving installation speed. Furthermore, the angle between the support rod and the first fixed rod is consistent with the angle between the oar handle and the oar plate, ensuring that the oar plate is parallel to the bottom surface of the worktable during testing, guaranteeing consistency in the force direction of the oar plates for different oars during measurement, and improving the accuracy of the test data. The cooperation of the first, second, and third fixed clamps achieves stable clamping of different parts of the oar, enabling the device to perform strength testing on different parts of the oar without requiring additional equipment changes for different testing targets, saving testing costs and improving testing efficiency. The third fixed clamp can be adjusted in position according to the size of the oar and testing requirements, adapting to oars of different sizes and specifications, thus increasing the applicability of this device. This device has a simple structure, few parts, low production and manufacturing costs, and is suitable for large-scale application. Attached Figure Description
[0013] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0014] Figure 1 This is a schematic diagram of the structure of this utility model;
[0015] Figure 2 This is a front view schematic diagram of the present utility model;
[0016] Symbols in the diagram: 1. Workbench; 2. Oar; 3. First fixing rod; 4. Second fixing rod; 5. Support rod; 6. First fixing clamp; 7. Second fixing clamp; 8. Third fixing clamp; 9. Mounting rod; 10. Double hook tensioner; 11. Tensile tester; 12. Connecting block. Detailed Implementation
[0017] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.
[0018] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.
[0019] It should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.
[0020] The present application will now describe a propeller strength testing device provided in the embodiments of this application.
[0021] Please see Figure 1 and Figure 2The paddle strength testing device includes a workbench 1, which is a rectangular frame structure. During testing, the paddle 2 is installed inside the workbench 1. A first fixing rod 3 is located on the bottom surface of the workbench 1, and a second fixing rod 4 is located on one side of the workbench 1. A support rod 5 for placing the paddle 2 is located between the first fixing rod 3 and the second fixing rod 4, providing stable support for the paddle 2. A first fixing clamp 6 is located on the first fixing rod 3, and a second fixing clamp 7 is located on the second fixing rod 4. A third fixing clamp 8 is slidably connected to the support rod 5. The first fixing clamp 6 and the second fixing clamp 7 cooperate to fix the handle end of the paddle handle, and the first fixing clamp 6 and the third fixing clamp 8 cooperate to fix the other end of the paddle handle. A tension loading assembly connected to the paddle 2 is located on the top surface of the workbench 1. A tension measuring gauge 11 is connected to the force-applying end of the tension loading assembly. The third fixing clamp 8 can be adjusted in position according to the size of the paddle 2 and testing requirements, adapting to paddles of different sizes and specifications, thus improving the applicability of this device.
[0022] Specifically, during use, the operator first places the oar 2 to be tested on the bottom surface of the workbench 1. When testing the strength of the connection between the oar plate and the handle, the operator secures the connection between the oar plate and the handle using the first fixing clamp 6 and the handle end of the handle using the second fixing clamp 7. At this time, the handle is fixed to the support rod 5, and the oar plate is located below the tension loading assembly. The oar plate has a ring buckle. The operator connects the tension loading assembly to the ring buckle on the oar plate and pulls the oar plate upwards using the tension loading assembly until the connection between the oar plate and the handle breaks. The tension gauge records the tension force on the oar plate at the time of breakage, thereby determining the strength of the connection between the oar plate and the handle. During this process, the operator can slide and adjust the position of the third fixing clamp 8 to position it in the middle of the handle and clamp it, providing more stable support for the handle and ensuring the stability of the handle during the force test. When testing the strength of the propeller handle, the operator reverses the direction of the propeller 2 and secures the connection between the propeller plate and the handle using the first fixing clamp 6. Based on the handle length and testing requirements, the operator slides the third fixing clamp 8 to adjust its position on the support rod 5. The third fixing clamp 8 secures the end of the handle that connects to the inside of the propeller plate (i.e., the end exposed after the propeller plate breaks). At this point, the handle end of the handle is located below the tension loading component, and the other end of the handle is fixed to the support rod 5. The operator connects the force-applying end of the tension loading component to the handle end of the handle using a rope or other connecting parts. The operator pulls the handle upwards using the tension loading component until it breaks. The tension meter 11 records the tension force on the handle at the time of breakage, thus determining the handle's strength. This device has a simple structure, few parts, low production and manufacturing costs, and is suitable for large-scale application.
[0023] Furthermore, the angle between the support rod 5 and the first fixed rod 3 is consistent with the angle between the propeller handle and the propeller plate. After the handle end of the propeller handle is fixed to the support rod 5, the propeller plate can be parallel to the bottom surface of the worktable 1, ensuring the consistency of the force direction of the propeller plates of different propellers 2 during measurement and improving the accuracy of the test data.
[0024] Furthermore, the upper surface of the support rod 5 is arc-shaped to match the propeller handle. The upper surface fits the shape of the propeller handle, increasing the contact area and making the propeller handle more securely fixed.
[0025] Specifically, the workbench 1 includes four parallel and vertically arranged columns. The tops of adjacent columns are connected by an upper crossbeam, and the bottoms of adjacent columns are connected by a lower crossbeam. A first fixing rod 3 is provided between two lower crossbeams arranged along the length of the workbench 1, and a second fixing rod 4 is provided between two adjacent columns. The first fixing rod 3 and the second fixing rod 4 are arranged in parallel.
[0026] Specifically, an installation rod 9 is provided between two upper crossbeams arranged along the length of the workbench 1. The installation rod 9 is provided with a hanging ring connected to the tension loading component. The tension loading component is vertically suspended on the hanging ring, and its bottom end is connected to the paddle 2 below.
[0027] In this embodiment, the tension loading component includes a double-hook tensioner 10 connected to a hanging ring. A connecting block 12 is connected to the free end of the double-hook tensioner 10, and the connecting block 12 is connected to the measuring end of a tension measuring instrument 11. A hook that engages with the paddle 2 is located at the bottom of the connecting block 12. During testing, the hook is connected to a ring on the paddle plate or to the paddle handle via a connecting element such as a pull rope. The double-hook tensioner 10 is existing technology and includes a handle, a ratchet that engages with the handle, and a steel wire rope wound around the ratchet. By operating the handle, the steel wire rope contracts and tightens, thereby generating tension on the paddle 2 below. Specifically, the operator operates the handle of the double-hook tensioner 10, causing the free end of the double-hook tensioner 10 to move upward, applying an upward tension to the connecting block 12. The tension is transmitted through the connecting block 12 to the tension measuring instrument 11 and the paddle 2. As the operator continues to operate the handle, the tension gradually increases until the paddle 2 breaks. The tension measuring instrument 11 records the peak tension (the value at the time of breakage) in real time.
[0028] Specifically, the first fixing rod 3 is located in the middle of the lower crossbeam arranged along the length of the workbench 1, and the mounting rod 9 is located at the end of the upper crossbeam arranged along the length of the workbench 1 away from the support rod 5.
[0029] In this embodiment, the first fixing clamp 6 and the second fixing clamp 7 are metal clamps welded to the first fixing rod 3 and the second fixing rod 4 respectively, and the third fixing clamp 8 is a metal clamp with its bottom welded to the sliding sleeve. The sliding sleeve is slidably connected to the support rod 5.
[0030] The method of using this utility model is as follows: The operator first places the oar 2 to be tested on the bottom surface of the workbench 1. When it is necessary to test the strength of the connection between the oar plate and the oar handle, the operator fixes the connection between the oar plate and the oar handle with the first fixing clamp 6 and fixes the handle end of the oar handle with the second fixing clamp 7. The operator connects the double hook tensioner 10 to the ring buckle on the oar plate and rotates the wrench of the double hook tensioner 10 until the connection between the oar plate and the oar handle breaks. The tension measuring gauge 11 records the tension on the oar plate at the time of breakage. When it is necessary to test the strength of the paddle handle, the staff will turn the paddle 2 around and fix the connection between the paddle plate and the paddle handle with the first fixing clamp 6. According to the length of the paddle handle and the testing requirements, the third fixing clamp 8 will be slid to adjust its position on the support rod 5. The paddle handle will be fixed with the third fixing clamp 8 to the end that is connected to the inside of the paddle plate (i.e. the end exposed after the paddle plate breaks). The staff will connect the double hook tensioner 10 to the handle end of the paddle handle with a pull rope or other connecting parts. The staff will turn the wrench of the double hook tensioner 10 until the paddle handle breaks. The tension meter 11 will record the tension on the paddle handle when it breaks.
[0031] In this invention, a first fixing rod 3 and a second fixing rod 4 are provided on the workbench 1, and a support rod 5 is provided between the first fixing rod 3 and the second fixing rod 4, providing stable support for the paddle 2. The first fixing rod 3, the second fixing rod 4, and the support rod 5 facilitate quick positioning of the paddle handle during installation, improving installation speed. Furthermore, the angle between the support rod 5 and the first fixing rod 3 is consistent with the angle between the paddle handle and the paddle plate, ensuring that the paddle plate is parallel to the bottom surface of the workbench 1 during testing. This guarantees the consistency of the force direction of the paddle plates of different paddles 2 during measurement, improving the accuracy of the test data. The cooperation of the first fixing clamp 6, the second fixing clamp 7, and the third fixing clamp 8 achieves stable clamping of different parts of the paddle 2, enabling the device to perform strength testing on different parts of the paddle 2 without requiring additional equipment replacement for different testing targets, saving testing costs and improving testing efficiency. The third fixing clamp 8 can be adjusted in position according to the size of the paddle 2 and testing requirements, adapting to paddles of different sizes and specifications, thus increasing the applicability of the device. This device has a simple structure, few parts, low production and manufacturing costs, and is suitable for large-scale application.
[0032] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.
Claims
1. A device for testing the strength of a ship's oar, comprising a workbench, wherein the workbench is a cuboid frame structure; characterized in that: The bottom surface of the workbench is provided with a first fixing rod, and one side of the workbench is provided with a second fixing rod. A support rod for placing the oar is provided between the first fixing rod and the second fixing rod. The first fixing rod is provided with a first fixing clamp, the second fixing rod is provided with a second fixing clamp, and a third fixing clamp is slidably connected to the support rod. The first fixing clamp and the second fixing clamp cooperate to fix the handle end of the oar handle, and the first fixing clamp and the third fixing clamp cooperate to fix the other end of the oar handle. The top surface of the workbench is provided with a tension loading assembly connected to the oar, and the force application end of the tension loading assembly is connected to a tension measuring gauge.
2. The oar strength testing device as described in claim 1, characterized in that: The angle between the support rod and the first fixed rod is the same as the angle between the propeller handle and the propeller plate.
3. The paddle strength testing device as described in claim 2, characterized in that: The upper surface of the support rod is arc-shaped to match the propeller handle.
4. The paddle strength testing device as described in claim 1, characterized in that: The workbench includes four parallel and vertically arranged columns. The tops of adjacent columns are connected by an upper crossbeam, and the bottoms of adjacent columns are connected by a lower crossbeam. A first fixing rod is provided between two lower crossbeams arranged along the length of the workbench, and a second fixing rod is provided between two adjacent columns. The first fixing rod and the second fixing rod are arranged in parallel.
5. The propeller strength testing device as described in claim 4, characterized in that: A mounting rod is provided between the two upper crossbeams arranged along the length of the workbench, and a hanging ring is provided on the mounting rod to connect with the tension loading assembly.
6. The paddle strength testing device as described in claim 5, characterized in that: The tension loading assembly includes a double-hook tensioner connected to the hanging ring. The free end of the double-hook tensioner is connected to a connecting block, which is connected to the measuring end of the tension gauge. The bottom of the connecting block is provided with a hook that cooperates with the paddle.
7. The propeller strength testing device as described in claim 5, characterized in that: The first fixing rod is located in the middle of the lower crossbeam arranged along the length of the workbench, and the mounting rod is located at the end of the upper crossbeam arranged along the length of the workbench away from the support rod.
8. The oar strength testing device as described in claim 1, characterized in that: The first fixing clamp and the second fixing clamp are metal clamps welded to the first fixing rod and the second fixing rod respectively, and the third fixing clamp is a metal clamp with its bottom welded to the sliding sleeve. The sliding sleeve is slidably connected to the support rod.