A propeller blade size auxiliary measuring device

Abstract

The utility model relates to the technical fields of measuring equipment, put forward a kind of propeller blade size auxiliary measuring device, including measuring table, locating seat, side pressure mechanism, arc support mechanism, press-down mounting seat, press-down mechanism and measuring mechanism;Locating seat is set in the middle part of measuring table, two groups of side pressure mechanism are respectively set in the left and right sides of locating seat, and the output end of two groups of side pressure mechanism respectively does telescopic motion to the direction of locating seat;Arc support mechanism is set in the back side of locating seat, and the output end of arc support mechanism does telescopic motion to the direction of locating seat;Two groups of measuring mechanism are slidably set on measuring table along left and right direction, and measuring mechanism is located in the front side of locating seat;Press-down mounting seat is set above locating seat, press-down mechanism is set on press-down mounting seat, and the output end of press-down mechanism passes through press-down mounting seat;Through multidirectional cooperative positioning clamping guaranteeing precision stability, utilize measuring mechanism to carry out automatic detection to size, effectively improve measuring efficiency and precision.

Description

Technical Field

[0001] This utility model relates to the technical field of measuring equipment, and in particular to an auxiliary measuring device for propeller blade dimensions. Background Technology

[0002] As a core power component in aviation, shipbuilding, and general machinery, the performance of propellers directly determines the power output efficiency, operational stability, and energy consumption level of the equipment. Dimensions, as a key geometric parameter of propeller blades, are defined as the theoretical distance the blade travels along the axial direction during one revolution around its axis. They directly reflect the blade's work capacity on the fluid and are a core indicator that must be strictly controlled during propeller design, manufacturing, and maintenance. The propeller blades of the rim propeller have been improved to shaftless propellers. However, there is a lack of dedicated tools for dimensional measurement, and manual tools are currently used for measurement. Current measurement technology suffers from many problems, such as high dependence on operator experience for measurement accuracy and low efficiency. Utility Model Content

[0003] To address the aforementioned shortcomings, the purpose of this invention is to propose an auxiliary measuring device for propeller blade dimensions, thereby solving the problems of unstable measurement accuracy and low efficiency in existing technologies.

[0004] To achieve this objective, the present invention adopts the following technical solution: A propeller blade size auxiliary measuring device includes a measuring platform, a positioning seat, a side pressure mechanism, an arc-shaped support mechanism, a downward pressure mounting seat, a downward pressure mechanism, and a measuring mechanism; The positioning seat is located in the middle of the measuring platform. There are two sets of side pressing mechanisms, which are respectively located on the left and right sides of the positioning seat. The output ends of the two sets of side pressing mechanisms extend and retract towards the positioning seat. The arc-shaped support mechanism is located on the rear side of the positioning seat, and the output end of the arc-shaped support mechanism extends and retracts towards the positioning seat. The measuring mechanism is provided in two sets, and the two sets of measuring mechanisms are slidably disposed on the measuring platform in the left and right direction. The measuring mechanism is located in front of the positioning seat. The pressing mounting base is disposed above the positioning base, and the pressing mechanism is disposed on the pressing mounting base. The output end of the pressing mechanism passes through the pressing mounting base and moves up and down towards the positioning base.

[0005] Preferably, the side pressure mechanism includes a side pressure base, two guide rod cylinders, and a side pressure plate. The side pressure base is disposed on the measuring platform and on the side of the positioning seat. The two guide rod cylinders are respectively disposed at both ends of the side pressure base, and both ends of the side pressure plate are respectively connected to the output ends of the two guide rod cylinders.

[0006] Preferably, the arc-shaped support mechanism includes a support base, a support cylinder, and an arc-shaped support plate; The support base is disposed on the measuring platform, and the support base is disposed on the rear side of the positioning seat; The support cylinder is provided in two sets, and the two sets of support cylinders are respectively located at both ends of the support base. The support cylinders are respectively hinged to both ends of the arc-shaped support plate.

[0007] Preferably, the output end of the supporting cylinder is provided with a hinge joint, and the two ends of the rear side of the arc-shaped support plate are provided with hinge seats, and the hinge joint is hinged to the hinge seat respectively.

[0008] Preferably, the measuring platform is provided with a guide rail, and the measuring mechanism includes a movable base, a slider and an infrared detection grating. The bottom of the movable base is provided with a slider, which is slidably disposed on the guide rail, and the infrared detection grating is vertically disposed on the movable base.

[0009] Preferably, it further includes a drive assembly, which includes a drive motor, a drive gear, and a rack. The rack is parallel to the guide rail and disposed on one side of the guide rail. The drive motor is fixedly disposed on the movable base. The drive gear is disposed at the output end of the drive motor and meshes with the rack.

[0010] Preferably, the movable seat includes a sliding plate, a measuring plate, and a reinforcing plate. The sliding plate is horizontally arranged, and the slider is provided at the bottom of the sliding plate. The measuring plate is vertically arranged on the upper surface of the sliding plate, and the infrared detection grating is arranged on the surface of the measuring plate. The reinforcing plate is a right-angled triangle, and the two straight sides of the reinforcing plate are fixedly connected to the sliding plate and the measuring plate, respectively.

[0011] Preferably, the pressing mechanism includes two sets of pressing cylinders, a pressing plate, and a buffer assembly; the two sets of pressing cylinders are respectively vertically arranged on the pressing mounting base, the buffer assembly is respectively connected to the output end of the two sets of pressing cylinders, and the pressing plate is arranged on the elastic end of the buffer assembly.

[0012] Preferably, the buffer assembly includes a positioning plate, a positioning guide post, and a buffer spring; The positioning plate is fixedly connected to the output end of the pressing cylinder. The positioning plate is provided with a plurality of guide holes. The positioning guide post is slidably disposed in the guide holes. The top end of the positioning guide post is provided with a limit block. The bottom end of the positioning guide post is fixedly connected to the pressing plate. The buffer spring is sleeved on the outer periphery of the positioning guide post. Under the elastic force of the buffer spring, the pressing plate tends to move away from the positioning plate.

[0013] One of the above technical solutions has the following advantages or beneficial effects: A propeller blade dimension auxiliary measuring device ensures accuracy and stability through multi-directional collaborative positioning and clamping. It replaces a large number of manual operations in traditional measurement through a mechanical design. It realizes an automated process from workpiece fixation to dimension detection using a measuring mechanism through a side pressure mechanism, an arc support mechanism, and a downward pressure mechanism. The measurement efficiency is greatly improved compared with traditional methods. The adjustable structure enhances adaptability and has the advantages of reliable structure and convenient operation. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural schematic diagram of one embodiment of the present utility model; Figure 2 This is a schematic diagram of one embodiment of the present invention, omitting the pressing installation and pressing mechanism; Figure 3 This is a schematic diagram of a measuring mechanism according to one embodiment of the present invention; Figure 4 This is a schematic diagram of the pressing mechanism of one embodiment of the present invention; Figure 5 This is a schematic diagram of an arc-shaped support mechanism according to an embodiment of the present invention; Figure 6 This is a schematic diagram of a propeller blade of the size to be measured according to one embodiment of the present invention.

[0015] The components include: measuring platform 1, guide rail 11, positioning seat 2, side pressure mechanism 3, side pressure base 31, guide rod cylinder 32, side pressure plate 33, arc-shaped support mechanism 4, support base 41, support cylinder 42, arc-shaped support plate 43, hinge joint 44, hinge seat 45, downward pressure mounting seat 5, downward pressure mechanism 6, downward pressure cylinder 61, downward pressure plate 62, buffer assembly 63, positioning plate 631, positioning guide post 632, buffer spring 633, guide hole 630, limit block 634, measuring mechanism 7, moving seat 71, sliding plate 711, measuring plate 712, reinforcing plate 713, slider 72, infrared detection grating 73, drive assembly 8, drive motor 81, drive gear 82, and rack 83. Detailed Implementation

[0016] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0017] In the description of this utility model, it should be understood that the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They 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, and therefore should not be construed as a limitation on this utility model. Furthermore, features defined with "first" and "second" may explicitly or implicitly include one or more of these features, used to distinguish and describe features, without any order or emphasis.

[0018] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0019] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0020] The following is combined with Figures 1 to 6 This utility model describes an auxiliary measuring device for propeller blade dimensions, which includes a measuring platform 1, a positioning seat 2, a side pressing mechanism 3, an arc-shaped support mechanism 4, a pressing mounting seat 5, a pressing mechanism 6, and a measuring mechanism 7. The positioning seat 2 is located in the middle of the measuring platform 1 and is used to place the propeller blade to be measured. There are two sets of side pressure mechanisms 3, which are respectively located on the left and right sides of the positioning seat 2. The output ends of the two sets of side pressure mechanisms 3 extend and retract towards the positioning seat 2 to clamp the left and right ends of the blade. The arc-shaped support mechanism 4 is located on the rear side of the positioning seat 2. The output end of the arc-shaped support mechanism 4 extends and retracts in the direction of the positioning seat 2, thereby supporting and positioning the rear side of the blade to ensure that the blade is centered. The measuring mechanism 7 is provided in two sets, and the two sets of measuring mechanisms 7 are slidably disposed on the measuring platform 1 in the left and right direction. The measuring mechanism 7 is located in front of the positioning seat 2. By moving the two sets of measuring mechanisms 7, the left and right ends of the blade are detected, thereby calculating the distance between the two sets of measuring mechanisms 7, and thus obtaining the distance between the left and right ends of the blade, thereby further calculating the size. The pressing mounting base 5 is disposed above the positioning base 2, and the pressing mechanism 6 is disposed on the pressing mounting base 5. The output end of the pressing mechanism 6 passes through the pressing mounting base 5 and moves up and down towards the positioning base 2. The pressing mechanism 6 presses the blade to prevent the blade from loosening and causing inaccurate measurement.

[0021] Specifically, the positioning seat 2, as the basic bearing component, provides a reference platform for the propeller blades, ensuring the consistency of the initial position of the blades; two sets of symmetrically arranged side-pressing mechanisms 3 synchronously extend and clamp from the left and right directions, which not only can adapt to blades of different widths, but also avoids the displacement or deformation of the blades caused by unilateral pressure through symmetrical force; the arc-shaped support mechanism 4 is designed for the curved surface features of the rear side of the blade, and its output end extension and retraction movement can closely fit the rear contour of the blade, realizing dual positioning of the blade in the radial and circumferential directions, ensuring that the blade is always in the reference position of the measurement center, solving the key problem of inaccurate blade center positioning in traditional measurement; the pressing mechanism 6 vertically lifts and presses from above, further fixing the blade through axial pressure, effectively preventing the blade from loosening due to external force interference or its own weight during the measurement process, and completely avoiding repeated measurement errors caused by workpiece displacement. This device has strong adaptability and can cover the measurement needs of various specifications of propeller blades, effectively reducing equipment investment costs. The coordinated action of multiple mechanisms ensures that the blades remain stable and have a consistent reference throughout the measurement process, greatly reducing the impact of human positioning errors on the measurement results. The measurement accuracy and stability are significantly improved compared to traditional manual positioning or single clamping methods.

[0022] Specifically, multi-directional collaborative positioning and clamping ensures accuracy and stability, and the mechanical design replaces a large number of manual operations in traditional measurement. The side pressure mechanism 3, arc support mechanism 4, and downward pressure mechanism 6 realize the automated process from workpiece fixing to dimension detection using the measuring mechanism 7, which greatly improves measurement efficiency compared to traditional methods. The adjustable structure enhances adaptability, while also having the advantages of reliable structure and convenient operation.

[0023] Furthermore, the side pressure mechanism 3 includes a side pressure base 31, two guide rod cylinders 32, and a side pressure plate 33. The side pressure base 31 is disposed on the measuring platform 1 and on the side of the positioning seat 2. The two guide rod cylinders 32 are respectively disposed at both ends of the side pressure base 31, and both ends of the side pressure plate 33 are respectively connected to the output ends of the two guide rod cylinders 32.

[0024] Specifically, the guide rod cylinder 32 has its own guiding structure, which has high motion accuracy and strong rigidity. It can accurately control the extension and retraction stroke and clamping position of the side pressure plate 33, so that the clamping action of the two sets of side pressure mechanisms 3 on the left and right is highly synchronized, ensuring the symmetrical positioning of the blade in the left and right directions, and further improving the consistency of the measurement reference. The two guide rod cylinders 32 are symmetrically arranged at both ends of the side pressure base 31. The side pressure plate 33 is driven to move by synchronous extension and retraction. Compared with the single drive structure, it can completely avoid the side pressure plate 33 from tilting or twisting during the stroke, ensuring that the side pressure plate 33 always keeps parallel and in contact with the side of the blade, eliminating the positioning offset caused by uneven force. The side pressure base 31 raises the guide rod cylinder 32, so that the guide rod cylinder 32 is connected to the center line position of the side pressure plate 33, improving the stability of the side pressure plate 33 during extension and retraction.

[0025] Furthermore, the arc-shaped support mechanism 4 includes a support base 41, a support cylinder 42, and an arc-shaped support plate 43; The support base 41 is disposed on the measuring platform 1, and the support base 41 is disposed on the rear side of the positioning seat 2; The support cylinder 42 is provided in two sets, and the two sets of support cylinder 42 are respectively disposed at both ends of the support base 41. The support cylinder 42 is respectively hinged to both ends of the arc-shaped support plate 43.

[0026] Specifically, the dual-cylinder symmetrical drive ensures that the arc-shaped support plate 43 is subjected to balanced force, avoiding tilting of the support plate due to force on one side, and keeping the support plate parallel to the rear profile of the blade. The inner side of the arc-shaped support plate 43 has an arc profile, which matches the conventional curved surface of the rear side of the propeller blade. The arc-shaped support plate 43 and the support cylinder 42 are detachable. Depending on the size of the propeller blade, the arc-shaped support plate 43 with different curvature can be replaced according to the curvature, thereby expanding the range of adaptability.

[0027] Furthermore, the output end of the support cylinder 42 is provided with a hinge joint 44, and the two ends of the rear side of the arc-shaped support plate 43 are provided with hinge seats 45, and the hinge joint 44 is hinged to the hinge seat 45 respectively.

[0028] Specifically, the hinge joint 44 at the output end of the support cylinder and the hinge seat 45 of the arc-shaped support plate 43 form a standardized hinge pair. Compared with direct hinge, the connection gap is smaller and the rotation accuracy is higher. It can realize the precise micro-angle adjustment of the arc-shaped support plate 43 around the hinge point. When facing the trailing surface of the blade with different curvatures, the two sets of support cylinders 42 can drive the arc-shaped support plate 43 to adaptively adjust its posture through the flexible rotation of the hinge joint 44 and the hinge seat 45, ensuring that its arc surface is completely in contact with the blade surface, completely eliminating the contact gap caused by the traditional rigid connection, and further improving the accuracy of the radial positioning of the blade.

[0029] Furthermore, the measuring platform 1 is provided with a guide rail 11, and the measuring mechanism 7 includes a movable seat 71, a slider 72 and an infrared detection grating 73. The bottom of the movable seat 71 is provided with a slider 72, which is slidably disposed on the guide rail 11, and the infrared detection grating 73 is vertically disposed on the movable seat 71.

[0030] Specifically, the guide rail 11 of the measuring table 1 and the slider 72 at the bottom of the moving seat 71 form a rigid sliding pair. The guide rail 11 provides a precise linear guiding reference. The small gap between the slider 72 and the guide rail 11 and the low movement resistance can effectively prevent the moving seat 71 from deviating or jamming when sliding, ensuring that the movement trajectory of the two sets of measuring mechanisms 7 is strictly parallel to the direction to be measured of the blade. This greatly improves the displacement accuracy of the moving seat 71, keeps the positioning error of the infrared detection grating 73 within a small range, and enables accurate identification of the left and right ends of the blade, thereby improving the accuracy of the dimensional measurement results.

[0031] Furthermore, it also includes a drive assembly 8, which includes a drive motor 81, a drive gear 82 and a rack 83. The rack 83 is parallel to the guide rail 11 and is disposed on one side of the guide rail 11. The drive motor 81 is fixedly disposed on the movable seat 71. The drive gear 82 is disposed at the output end of the drive motor 81 and is meshed with the rack 83.

[0032] Specifically, the meshing transmission between the drive gear 82 and the rack 83 features high rigidity and small transmission clearance. Combined with the guiding effect of the guide rail 11 and the slider 72, it can achieve precise control of the linear displacement of the moving seat 71, with the positioning error controlled at the micrometer level. This ensures that the infrared detection grating 73 can accurately align with the blade end detection position, improving the accuracy of the detection. The drive component 8 can be linked with the overall control system of the device to realize the automated movement, end detection, and data recording of the measuring mechanism 7. There is no need for manual pushing of the moving seat 71 for positioning, completely replacing the traditional manual operation, minimizing the manual intervention in blade size measurement, and effectively improving work efficiency.

[0033] Furthermore, the movable seat 71 includes a sliding plate 711, a measuring plate 712, and a reinforcing plate 713. The sliding plate 711 is horizontally arranged, and the slider 72 is provided at the bottom of the sliding plate 711. The measuring plate 712 is vertically arranged on the upper end surface of the sliding plate 711. The infrared detection grating 73 is disposed on the surface of the measuring plate 712. The reinforcing plate 713 is a right-angled triangle, and the two straight sides of the reinforcing plate 713 are fixedly connected to the sliding plate 711 and the measuring plate 712, respectively.

[0034] Specifically, the sliding plate 711 and the measuring plate 712 are vertically fixed to form an L-shaped structure. With the triangular stabilizing support of the right-angled triangular reinforcing plate 713, the overall rigidity of the moving seat 71 is greatly improved, preventing the measuring plate 712 from bending and deforming. The two straight sides of the reinforcing plate 713 are rigidly connected to the sliding plate 711 and the measuring plate 712 respectively, ensuring that the infrared detection grating 73 always maintains a vertical installation posture and improving the accuracy of dimensional measurement.

[0035] Furthermore, the pressing mechanism 6 includes two sets of pressing cylinders 61, a pressing plate 62, and a buffer assembly 63; the two sets of pressing cylinders 61 are respectively vertically arranged on the pressing mounting base 5, the buffer assembly 63 is respectively connected to the output end of the two sets of pressing cylinders 61, and the pressing plate 62 is arranged on the elastic end of the buffer assembly 63.

[0036] Specifically, the pressing cylinder 61 can be automatically raised and lowered through the pneumatic control system. In conjunction with the overall clamping process of the device, it can automatically press down without manual operation, which can improve work efficiency. The pressing plate 62 is driven synchronously to raise and lower. Compared with single cylinder drive, it can avoid the pressing plate 62 tilting due to uneven force, ensure that the pressing plate 62 is in parallel contact with the upper surface of the blade, and the clamping force is evenly distributed along the width direction of the blade, preventing local overpressure from causing blade deformation or positioning deviation.

[0037] Furthermore, the buffer assembly 63 includes a positioning plate 631, a positioning guide post 632, and a buffer spring 633; The positioning plate 631 is fixedly connected to the output end of the pressing cylinder 61. The positioning plate 631 is provided with a plurality of guide holes 630. The positioning guide post 632 is slidably disposed in the guide holes 630. The top end of the positioning guide post 632 is provided with a limit block 634. The bottom end of the positioning guide post 632 is fixedly connected to the pressing plate 62. The buffer spring 633 is sleeved on the outer periphery of the positioning guide post 632. Under the elastic force of the buffer spring 633, the pressing plate 62 tends to move away from the positioning plate 631.

[0038] Specifically, the positioning guide post 632 is slidably disposed within the guide hole 630 of the positioning plate 631 to form a guiding structure, restricting the movement trajectory of the lower pressure plate 62 and ensuring that it only moves up and down in the vertical direction during the pressing process. This avoids tilting or offset of the lower pressure plate 62 due to spring deformation or uneven force. The buffer spring 633 is sleeved on the outside of the positioning guide post 632 and built between the positioning plate 631 and the lower pressure plate 62. When the cylinder drives the positioning plate 631 to move downward, the spring absorbs the impact force through compression deformation, forming a flexible pressing process to avoid damage to the blade surface caused by rigid contact. The limiting block 634 at the top of the positioning guide post 632 is used to restrict the downward movement of the lower pressure plate 62 to prevent the positioning guide post 632 from dislodging from the guide hole 630 and causing the problem of not being able to guide.

[0039] Other components and operations of the propeller blade size auxiliary measuring device according to the present invention are known to those skilled in the art and will not be described in detail here.

[0040] In this specification, the terms "embodiment," "example," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0041] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An auxiliary measuring device for propeller blade dimensions, characterized in that: It includes a measuring platform, a positioning seat, a side pressing mechanism, an arc-shaped support mechanism, a pressing mounting seat, a pressing mechanism, and a measuring mechanism; The positioning seat is located in the middle of the measuring platform. There are two sets of side pressing mechanisms, which are respectively located on the left and right sides of the positioning seat. The output ends of the two sets of side pressing mechanisms extend and retract towards the positioning seat. The arc-shaped support mechanism is located on the rear side of the positioning seat, and the output end of the arc-shaped support mechanism extends and retracts towards the positioning seat. The measuring mechanism is provided in two sets, and the two sets of measuring mechanisms are slidably disposed on the measuring platform in the left and right direction. The measuring mechanism is located in front of the positioning seat. The pressing mounting base is disposed above the positioning base, and the pressing mechanism is disposed on the pressing mounting base. The output end of the pressing mechanism passes through the pressing mounting base and moves up and down towards the positioning base.

2. The propeller blade size auxiliary measuring device according to claim 1, characterized in that: The side pressure mechanism includes a side pressure base, two guide rod cylinders, and a side pressure plate. The side pressure base is disposed on the measuring platform and on the side of the positioning seat. The two guide rod cylinders are respectively disposed at both ends of the side pressure base, and both ends of the side pressure plate are respectively connected to the output ends of the two guide rod cylinders.

3. The propeller blade size auxiliary measuring device according to claim 1, characterized in that: The arc-shaped support mechanism includes a support base, a support cylinder, and an arc-shaped support plate; The support base is disposed on the measuring platform, and the support base is disposed on the rear side of the positioning seat; The support cylinder is provided in two sets, and the two sets of support cylinders are respectively located at both ends of the support base. The support cylinders are respectively hinged to both ends of the arc-shaped support plate.

4. The propeller blade size auxiliary measuring device according to claim 3, characterized in that: The output end of the support cylinder is provided with a hinge joint, and the two ends of the rear side of the arc-shaped support plate are provided with hinge seats, and the hinge joint is hinged to the hinge seat respectively.

5. The propeller blade size auxiliary measuring device according to claim 1, characterized in that: The measuring platform is equipped with a guide rail, and the measuring mechanism includes a movable base, a slider, and an infrared detection grating. The bottom of the movable base is equipped with a slider, which is slidably mounted on the guide rail. The infrared detection grating is vertically mounted on the movable base.

6. The propeller blade size auxiliary measuring device according to claim 5, characterized in that: It also includes a drive assembly, which includes a drive motor, a drive gear and a rack. The rack is parallel to the guide rail and is disposed on one side of the guide rail. The drive motor is fixedly disposed on the movable base. The drive gear is disposed at the output end of the drive motor and meshes with the rack.

7. The propeller blade size auxiliary measuring device according to claim 5, characterized in that: The movable seat includes a sliding plate, a measuring plate, and a reinforcing plate. The sliding plate is horizontally arranged, and the slider is arranged at the bottom of the sliding plate. The measuring plate is vertically arranged on the upper surface of the sliding plate, and the infrared detection grating is arranged on the surface of the measuring plate. The reinforcing plate is a right-angled triangle, and the two straight sides of the reinforcing plate are fixedly connected to the sliding plate and the measuring plate, respectively.

8. The propeller blade size auxiliary measuring device according to claim 1, characterized in that: The pressing mechanism includes two sets of pressing cylinders, a pressing plate, and a buffer assembly; the two sets of pressing cylinders are vertically mounted on the pressing mounting base, the buffer assembly is connected to the output end of the two sets of pressing cylinders, and the pressing plate is located at the elastic end of the buffer assembly.

9. The propeller blade size auxiliary measuring device according to claim 8, characterized in that: The buffer assembly includes a positioning plate, a positioning guide post, and a buffer spring; The positioning plate is fixedly connected to the output end of the pressing cylinder. The positioning plate is provided with a plurality of guide holes. The positioning guide post is slidably disposed in the guide holes. The top end of the positioning guide post is provided with a limit block. The bottom end of the positioning guide post is fixedly connected to the pressing plate. The buffer spring is sleeved on the outer periphery of the positioning guide post. Under the elastic force of the buffer spring, the pressing plate tends to move away from the positioning plate.

Images