Propeller pitch measuring device
By using the positioning mechanism and servo motor-driven clamping plate of the propeller pitch measuring device to clamp the propeller, combined with the U-shaped guide rod and scale, the problems of instability and cumbersome distance measurement in the propeller measurement process are solved, and efficient and accurate pitch and angle measurement is achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- CHENGXI SHIPYARD
- Filing Date
- 2026-02-28
- Publication Date
- 2026-05-08
AI Technical Summary
Existing technologies struggle to securely clamp propellers of different sizes and shapes, causing swaying during measurement that affects accuracy. Meanwhile, traditional distance measurement methods are cumbersome, inefficient, and yield inaccurate results.
A propeller pitch measuring device is adopted, which includes a positioning mechanism, a servo motor and an arc-shaped clamp. The servo motor drives the arc-shaped clamp to clamp the propeller, and the U-shaped guide rod and scale are used to accurately measure the distance and angle.
This method achieves stable propeller clamping, improves measurement stability and accuracy, simplifies the distance measurement process, and enhances measurement efficiency and accuracy.
Smart Images
Figure CN121994104A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of propeller testing technology, and in particular to a propeller pitch measuring device. Background Technology
[0002] As a key component in shipbuilding, aviation, and other fields, the pitch parameter of a propeller directly affects its power performance and operating efficiency. Accurately measuring the propeller pitch is crucial for ensuring the normal operation and performance optimization of the equipment. The propeller is hoisted onto the rotary platform of a boring and milling machine with the hub facing upwards. The blades are then aligned using the small end plane and the inner hole of the small end. A laser rangefinder is mounted on the boring bar. After the blades are aligned, the propeller pitch can be measured.
[0003] When using the above-mentioned technology, the following technical problems were found in the existing technology: when clamping and fixing the propeller, it is often difficult to adapt to propellers of different sizes and shapes, the fixation is not stable enough, and it is easy to shake during the measurement process, thus affecting the measurement accuracy; at the same time, in terms of distance measurement and measuring the angle between the stator and the propeller, the existing technology uses traditional methods such as tape measures and manual rulers for distance measurement, and the traditional distance measurement method is relatively cumbersome to operate, has low measurement efficiency, and the accuracy of the measurement results needs to be improved. To this end, we designed a propeller pitch measuring device to provide an alternative technical solution to the above-mentioned technical problems. Summary of the Invention
[0004] The purpose of this invention is to provide a propeller pitch measuring device to solve the problems mentioned in the background art.
[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A propeller pitch measuring device includes an operating table. A load-bearing plate is fixed to the top of the operating table. Rectangular grooves are formed at all four ends of the top of the load-bearing plate. Arc-shaped clamps are slidably connected to the inner side of the rectangular grooves. There are four rectangular grooves and four arc-shaped clamps. A positioning mechanism is provided at the bottom of the load-bearing plate to drive the four arc-shaped clamps to limit the propeller. Slide seats are slidably connected to both ends of the top of the operating table. A U-shaped adjusting rod is slidably connected to the top of the inner side of the slide seat. A starting plate is slidably connected to one end of the outer side of the U-shaped adjusting rod, and a final starting plate is slidably connected to the other end of the outer side of the starting plate.
[0006] The positioning mechanism includes a linkage rod, a transmission disk, and a servo motor. The bottom end of the load-bearing plate is rotatably connected to the transmission disk, and the four ends of the transmission disk are rotatably connected to linkage rods. The ends of the linkage rods away from the transmission disk are rotatably connected to the arc-shaped clamping plates. The top of the operating table and directly below the transmission disk is equipped with a servo motor, and the output end of the servo motor is fixed to the transmission disk.
[0007] Each of the four arc-shaped clamps has an anti-slip pad fixed at one end that is close to the other.
[0008] A placement pad is fitted at the top of the load-bearing plate and between the four arc-shaped clamps.
[0009] The top of the control panel is fixed with U-shaped guide rods at both ends, and the outer side of the U-shaped guide rods is slidably connected to the slide block.
[0010] One end of the slide block is provided with a guide groove, and an L-shaped block is slidably connected to the inner side of the guide groove. One side of the L-shaped block is fixed to the bottom of the outer side of the U-shaped adjusting rod. One end of the L-shaped block is slidably connected with a pin. The other end of the slide block is provided with several limiting holes, and one end of the pin passes through the L-shaped block and is slidably connected to the corresponding limiting hole.
[0011] The inner side of the slide is equipped with a spring, the top end of the spring is fixed to the U-shaped adjusting rod, and the bottom end of the spring is fixed to the slide.
[0012] The starting plate has a scale fixed at one end, which is located directly above the U-shaped adjusting rod. The outer side of the scale is slidably connected to the starting plate, and the starting plate has an observation window inside.
[0013] An angle pointer is rotatably connected to the bottom end of the starting plate and the end away from the U-shaped adjusting rod. An angle ruler is mounted on the outside of the angle pointer, and the outside of the angle ruler is slidably connected to the starting plate.
[0014] The end of the starting plate has an observation window, a measuring needle is fixed inside the observation window, and the outer side of the angle ruler is slidably connected to the measuring needle.
[0015] It is clear without a doubt that the technical solution described above in this application can solve the technical problem that this application aims to address.
[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention uses a positioning mechanism (including a linkage rod, a transmission disc, and a servo motor) to drive four arc-shaped clamping plates to clamp and limit the propeller, which can effectively fix and position the propeller, ensuring the stability and firmness of the propeller on the load-bearing plate. The anti-slip pads fixed at the ends of the four arc-shaped clamping plates that are close to each other increase the friction between the arc-shaped clamping plates and the propeller, further improving the stability of the propeller, thereby ensuring the stability of the device in measuring the distance of the propeller. The U-shaped guide rod guides the sliding of the slide, enabling the slide to drive the U-shaped adjusting rod, starting plate, and ending plate to adjust accurately according to the position of the propeller. The cooperation of the starting plate, scale, and ending plate, combined with observation window two, allows for intuitive and accurate measurement of the propeller's length and distance. At the same time, the setting of the angle pointer, angle scale, observation window one, and measuring needle enables effective measurement of the angle between the two propellers and the propeller assembly angle, enriching the measurement functions of the device. Attached Figure Description
[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the structure between the operating table and the load-bearing plate of the present invention; Figure 3 This is a schematic diagram of the structure between the arc-shaped clamping plate and the load-bearing plate of the present invention; Figure 4 This is a schematic diagram of the positioning mechanism structure of the present invention; Figure 5 This is a schematic diagram of the structure between the U-shaped guide rod and the slide block of the present invention; Figure 6 This is a schematic diagram of the structure between the starting plate and the ending plate of the present invention and the U-shaped adjusting rod; Figure 7 This is a schematic diagram of the structure between the starting plate, the scale, and the ending plate of the present invention. Figure 8 This is a schematic diagram of the internal structure between the angle pointer and the terminal plate of the present invention; Figure 9 This is a schematic diagram of the structure between the slide block and the U-shaped adjusting rod of the present invention; Figure 10 This is a schematic diagram of the internal structure of the slide of the present invention.
[0019] In the diagram: 1. Control panel; 2. Slide; 3. U-shaped adjusting rod; 4. U-shaped guide rod; 5. Load-bearing plate; 6. Scale; 7. Starting plate; 8. Ending plate; 9. Rectangular groove; 10. Arc-shaped clamp; 11. Linkage rod; 12. Transmission disc; 13. Servo motor; 14. Angle pointer; 15. Angle ruler; 16. Observation window one; 17. Measuring needle; 18. Observation window two; 19. L-shaped block; 20. Pin; 21. Limiting hole; 22. Spring. Detailed Implementation
[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.
[0021] As shown in the background technology, when clamping and fixing propellers, it is often difficult to adapt to propellers of different sizes and shapes. The fixation is not stable enough and it is easy to shake during the measurement process, thus affecting the measurement accuracy. At the same time, in terms of distance measurement and measuring the angle between the stator and the propeller, the existing technology uses traditional methods such as tape measures and manual rulers for distance measurement. The traditional distance measurement methods are relatively cumbersome to operate, have low measurement efficiency, and the accuracy of the measurement results needs to be improved.
[0022] Example 1 Please see Figure 1-5 The present invention provides a technical solution: a propeller pitch measuring device, including an operating table 1, a load-bearing plate 5 fixed at the top of the operating table 1, rectangular grooves 9 are provided at all four ends of the top of the load-bearing plate 5, and arc-shaped clamping plates 10 are slidably connected to the inner side of the rectangular grooves 9. There are four rectangular grooves 9 and four arc-shaped clamping plates 10. A positioning mechanism for driving the four arc-shaped clamping plates 10 to limit the propeller is provided at the bottom of the load-bearing plate 5. Slide seats 2 are slidably connected at both ends of the top of the operating table 1. A U-shaped adjusting rod 3 is slidably connected to the top of the inner side of the slide seat 2. A starting plate 7 is slidably connected to one end of the outer side of the U-shaped adjusting rod 3, and a final plate 8 is slidably connected to the other end of the outer side of the starting plate 7. When it is necessary to measure the distance of the propeller, the propeller is placed on the load-bearing plate 5 and placed in the middle of the load-bearing plate 5. Then, the positioning mechanism drives the four arc-shaped clamps 10 to clamp and limit the propeller, so that the positioning mechanism can effectively fix and position the propeller. Then, the sliding slide 2 drives the U-shaped adjusting rod 3, the starting plate 7 and the ending plate 8 to measure the distance of the propeller. When the sliding slide 2 drives the U-shaped adjusting rod 3, the starting plate 7 and the ending plate 8 to slide directly above the propeller, the starting point is the side of the starting plate 7 opposite the propeller, and the ending point is the other side of the starting plate 8 opposite the propeller. Thus, the distance between the starting point and the ending point can be used to measure the distance of the propeller. The positioning mechanism includes a linkage rod 11, a transmission disk 12, and a servo motor 13. The bottom end of the load-bearing plate 5 is rotatably connected to the transmission disk 12. The four ends of the transmission disk 12 are rotatably connected to the linkage rod 11. The end of the linkage rod 11 away from the transmission disk 12 is rotatably connected to the arc-shaped clamping plate 10. The top of the operating table 1 and directly below the transmission disk 12 is equipped with a servo motor 13. The output end of the servo motor 13 is fixed to the transmission disk 12. When the propeller is placed on the load-bearing plate 5, the servo motor 13 is started to drive the transmission disk 12 to rotate. The transmission disk 12 drives the linkage rod 11 and the arc-shaped clamping plate 10 to clamp and limit the propeller along the guide of the rectangular groove 9, so as to ensure the stability and firmness of the propeller on the load-bearing plate 5, so as to ensure the stability of the device for propeller distance measurement. Anti-slip pads are fixed at the ends of the four arc-shaped clamps 10 that are close to each other. The anti-slip pads increase the stability between the arc-shaped clamps 10 and the propeller, and also increase the stability of the propeller. A placement pad is fitted at the top of the load-bearing plate 5 and between the four arc-shaped clamps 10 to increase the accuracy of propeller placement. Both ends of the top of the control panel 1 are fixed with U-shaped guide rods 4. The outer side of the U-shaped guide rods 4 is slidably connected to the slide block 2. By adjusting the slide block 2 along the guide of the U-shaped guide rods 4, the U-shaped adjusting rod 3, the starting plate 7 and the ending plate 8 are adjusted, and the adjustment and sliding are effectively adjusted according to the top of the propeller.
[0023] Example 2 Please see Figure 6-10 The present invention provides a technical solution: a guide groove is provided at one end of one side of the slide block 2, and an L-shaped block 19 is slidably connected to the inner side of the guide groove. One side of the L-shaped block 19 is fixed to the bottom end of the outer side of the U-shaped adjusting rod 3. A pin 20 is slidably connected to one end of the inner side of the L-shaped block 19. A plurality of limiting holes 21 are provided at the other end of one side of the slide block 2. One end of the pin 20 passes through the L-shaped block 19 and is slidably connected to the corresponding limiting hole 21. When the sliding L-shaped block 19 drives the U-shaped adjusting rod 3, the starting plate 7, the ending plate 8, and the angle pointer 14 to adjust according to the height of the propeller, then one end of the pin 20 is slidably connected to the corresponding limiting hole 21, effectively ensuring the stability of the U-shaped adjusting rod 3, the starting plate 7, the ending plate 8, and the angle pointer 14, as well as the stability of the distance measurement. A spring 22 is installed on the inner side of the slide block 2. The top end of the spring 22 is fixed to the U-shaped adjusting rod 3, and the bottom end of the spring 22 is fixed to the slide block 2. The spring 22 effectively drives the U-shaped adjusting rod 3 to move upward, so that the U-shaped adjusting rod 3, the starting plate 7, the ending plate 8 and the angle pointer 14 are reset. When adjustment is required, the L-shaped block 19 and the U-shaped adjusting rod 3 are pressed downward to apply pressure, and the starting plate 7, the ending plate 8 and the angle pointer 14 are effectively adjusted. A scale 6 is fixed to one end of the starting plate 7. The scale 6 is located directly above the U-shaped adjusting rod 3. The outer side of the scale 6 is slidably connected to the starting plate 8. An observation window 2 18 is opened inside the starting plate 8. The starting plate 7 drives the scale 6 to slide along the guide of the U-shaped adjusting rod 3 to the starting point, while the starting plate 8 slides along the guide of the U-shaped adjusting rod 3 to the starting point. At this time, the distance adjusted by the starting plate 8 and the scale 6 slide crosswise, and the propeller length can be effectively observed through the observation window 2 18. An angle pointer 14 is rotatably connected to the bottom end of the starting plate 8 and the end away from the U-shaped adjusting rod 3. An angle ruler 15 is mounted on the outside of the angle pointer 14, and the outside of the angle ruler 15 is slidably connected to the starting plate 8. The sliding block 2 drives the starting plate 8 to move to the propeller shaft center point, while the rotating angle pointer 14 drives the angle ruler 15 to rotate and adjust along the inside of the starting plate 8. At this time, the angle pointer 14 drives the angle ruler 15 to measure according to the angle of the propeller, so as to effectively measure the angle between the two propellers and the angle of the propeller assembly. An observation window 16 is provided at one end of the interior of the starting plate 8. A measuring needle 17 is fixed on the inner side of the observation window 16. The outer side of the angle ruler 15 is slidably connected to the measuring needle 17. The angle ruler 15 is driven by the angle pointer 14 to extend and slide along the interior of the starting plate 8. The observation window 16 effectively aligns, records and observes the angle ruler 15.
[0024] The usage process of the propeller pitch measuring device provided by this invention is as follows: The propeller is placed on the mounting pad at the top of the load-bearing plate 5, positioned in the middle between the four arc-shaped clamping plates 10. The servo motor 13 is started, its output driving the transmission disk 12 to rotate. The linkage rods 11, connected to the four ends of the transmission disk 12, move accordingly, thereby causing the arc-shaped clamping plates 10 to slide along the guide of the rectangular groove 9, clamping and limiting the propeller. Anti-slip pads fixed at the ends of the arc-shaped clamping plates 10 that are close to each other increase stability with the propeller. The outer side of the U-shaped guide rod 4 fixed at both ends of the top of the control panel 1 is slidably connected to the slide block 2. The slide block 2 can move along the guide of the U-shaped guide rod 4 to drive the U-shaped adjusting rod 3, the starting plate 7 and the final plate 8 until they reach directly above the propeller. An L-shaped block 19 is slidably connected in the guide groove on one side of the slide block 2, and is fixed to the bottom outer side of the U-shaped adjusting rod 3. Sliding the L-shaped block 19 can drive the U-shaped adjusting rod 3, the starting plate 7, the ending plate 8, and the angle pointer 14 to adjust according to the propeller height. After adjustment, one end of the pin 20 is slidably connected to the corresponding limiting hole 21 through the L-shaped block 19 to ensure its stability. At the same time, the spring 22 installed inside the slide block 2 has its top fixed to the U-shaped adjusting rod 3 and its bottom fixed to the slide block 2. When the L-shaped block 19 is released, the elasticity of the spring 22 can drive the U-shaped adjusting rod 3 and others to return to their original position. During adjustment, pressing the L-shaped block 19 and the U-shaped adjusting rod 3 will apply downward pressure for adjustment. The scale 6, fixed at one end of the starting plate 7, is located directly above the U-shaped adjusting rod 3 and is slidably connected to the ending plate 8. The starting plate 7 is slid to one side of the propeller as the starting point, and the ending plate 8 is adjusted to the other side of the propeller as the ending point. The distance of the ending plate 8 sliding across the scale 6 is observed through the observation window 18, thereby completing the measurement of the propeller length. An angle pointer 14 is rotatably connected to the bottom end of the terminal plate 8, away from the U-shaped adjusting rod 3. An angle ruler 15 mounted on its outer side is slidably connected to the terminal plate 8. The sliding slide 2 moves the terminal plate 8 to the propeller shaft center point. Rotating the angle pointer 14 causes the angle ruler 15 to rotate and adjust along the inside of the terminal plate 8. A measuring needle 17 fixed inside the observation window 16 of the terminal plate 8 is slidably connected to the angle ruler 15. Through the observation window 16, the angle ruler 15 can be aligned and recorded, thus completing the measurement of the angle between the two propellers and the propeller assembly angle. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
Claims
1. A propeller pitch measuring device, characterized in that, The system includes an operating table (1), with a load-bearing plate (5) fixed at the top. The load-bearing plate (5) has rectangular slots (9) at all four ends of its top. An arc-shaped clamp (10) is slidably connected to the inner side of the rectangular slot (9). There are four rectangular slots (9) and four arc-shaped clamps (10). The bottom of the load-bearing plate (5) is provided with a positioning mechanism for driving the four arc-shaped clamps (10) to limit the propeller. The top two ends of the operating table (1) are slidably connected with slide blocks (2). The top of the inner side of the slide block (2) is slidably connected with a U-shaped adjusting rod (3). One end of the outer side of the U-shaped adjusting rod (3) is slidably connected with a starting plate (7). The other end of the outer side of the starting plate (7) is slidably connected with a final starting plate (8).
2. The propeller pitch measuring device according to claim 1, characterized in that, The positioning mechanism includes a linkage rod (11), a transmission disk (12), and a servo motor (13). The bottom end of the load-bearing plate (5) is rotatably connected to the transmission disk (12). The four ends of the transmission disk (12) are rotatably connected to the linkage rod (11). The end of the linkage rod (11) away from the transmission disk (12) is rotatably connected to the arc-shaped clamp (10). The top of the operating table (1) and directly below the transmission disk (12) is equipped with a servo motor (13). The output end of the servo motor (13) is fixed to the transmission disk (12).
3. The propeller pitch measuring device according to claim 2, characterized in that, Anti-slip pads are fixed to one end of each of the four curved clamps (10) that are close to each other.
4. The propeller pitch measuring device according to claim 3, characterized in that, A placement pad is fitted at the top of the load-bearing plate (5) and between the four arc-shaped clamps (10).
5. A propeller pitch measuring device according to claim 2, characterized in that, Both ends of the top of the operating table (1) are fixed with U-shaped guide rods (4), and the outer side of the U-shaped guide rods (4) is slidably connected to the slide (2).
6. A propeller pitch measuring device according to claim 2, characterized in that, One end of the slide block (2) is provided with a guide groove, and an L-shaped block (19) is slidably connected to the inner side of the guide groove. One side of the L-shaped block (19) is fixed to the bottom of the outer side of the U-shaped adjusting rod (3). One end of the L-shaped block (19) is slidably connected with a pin (20). The other end of the slide block (2) is provided with several limiting holes (21). One end of the pin (20) passes through the L-shaped block (19) and is slidably connected to the corresponding limiting hole (21).
7. A propeller pitch measuring device according to claim 6, characterized in that, A spring (22) is fitted on the inner side of the slide (2). The top end of the spring (22) is fixed to the U-shaped adjusting rod (3), and the bottom end of the spring (22) is fixed to the slide (2).
8. A propeller pitch measuring device according to claim 6, characterized in that, A scale (6) is fixed at one end of the starting plate (7). The scale (6) is located directly above the U-shaped adjusting rod (3). The outer side of the scale (6) is slidably connected to the starting plate (8). An observation window (18) is opened inside the starting plate (8).
9. A propeller pitch measuring device according to claim 8, characterized in that, An angle pointer (14) is rotatably connected to the bottom end of the starting plate (8) and the end away from the U-shaped adjusting rod (3). An angle ruler (15) is mounted on the outside of the angle pointer (14), and the outside of the angle ruler (15) is slidably connected to the starting plate (8).
10. A propeller pitch measuring device according to claim 9, characterized in that, An observation window (16) is provided at one end of the end of the terminal plate (8). A measuring needle (17) is fixed on the inner side of the observation window (16). The outer side of the angle ruler (15) is slidably connected to the measuring needle (17).