A device for measuring geometric dimensions of blades

Abstract

The invention discloses a device for measuring the geometric dimensions of a blade, comprising: a base, a platform, a lifting mechanism and a measuring assembly, wherein a traction mechanism is installed below the base, the platform is arranged on the top end surface of the base, the platform is connected to the traction mechanism through a traction rope, and reciprocates along the length direction of the base; the lifting mechanism comprises a column vertically connected to one side of the top of the platform, and a cantilever slidably connected to the column, the cantilever reciprocates along the length direction of the column; the measuring assembly is installed at the end of the cantilever, and comprises a fixed dial, a vernier caliper and a moving dial, the fixed dial is a fan-shaped structure fixedly installed at the end of the cantilever, the moving dial is arranged concentrically with the fixed dial and is rotatably connected to the fixed dial, the lower end of the semicircular protractor is fixedly connected to the vernier caliper, and both ends of the vernier caliper are slidably connected with a moving clamping plate; the invention has a simple structure and high measuring accuracy.

Description

Technical Field

[0001] The invention relates to the field of measurement technology, and more particularly to a device for measuring the geometric dimensions of a blade. Background Art

[0002] Propellers are key components in rotorcraft power machinery, and composite propeller blades are particularly important during the inspection process. The general blade inspection method uses a three-dimensional coordinate measuring machine, which has high inspection accuracy, but has a long operation time, low efficiency, and requires special tooling for clamping.

[0003] Therefore, how to provide a device for measuring the geometric dimensions of blades is a problem that those skilled in the art need to solve urgently. Summary of the invention

[0004] The present invention provides a device for measuring the geometric dimensions of a blade, aiming to solve the above-mentioned technical problems in the prior art to a certain extent.

[0005] In order to achieve the above object, the present invention adopts the following technical solution:

[0006] A device for measuring the geometric dimensions of a blade, comprising:

[0007] A base, wherein a traction mechanism is installed below the base;

[0008] A platform, the platform is arranged on the top end surface of the base, the platform is connected to the traction mechanism through a traction rope, and reciprocates along the length direction of the base;

[0009] A lifting mechanism, the lifting mechanism comprising a column vertically connected to one side of the top of the platform, and a cantilever slidably connected to the column, the cantilever reciprocating along the length direction of the column;

[0010] A measuring assembly is installed at the end of the cantilever, and includes a fixed dial, a vernier caliper and a moving dial. The fixed dial is a fan-shaped structure fixedly installed at the end of the cantilever, the moving dial is arranged concentrically with the fixed dial and is rotatably connected to the fixed dial, the lower end of the semicircular protractor is fixedly connected to the vernier caliper, and both ends of the vernier caliper are slidably connected with a movable clamping plate.

[0011] Through the above scheme, the present invention moves the platform horizontally through the traction mechanism, slide rails and pulleys, moves the support arm up and down through the lifting mechanism, and performs angle measurement through the measuring component, thereby realizing measurement of different directions and angles at different positions of the blades, with easy operation and high measurement accuracy.

[0012] Furthermore, the upper end surface of the base is provided with mutually parallel flat rails and triangular slide rails along its length direction, and the bottom end of the platform is correspondingly provided with a flat groove and a dovetail groove adapted thereto.

[0013] Furthermore, the traction mechanism includes a first handwheel, a drum wheel, a rotating shaft and a pulley. The rotating shaft is parallel to the width direction of the base and is rotatably installed under the base. The first handwheel is fixed to one end of the rotating shaft. The drum wheel is arranged on the rotating shaft. The traction rope is wound around the drum wheel. Two groups of pulleys are symmetrically installed at both ends of the base. Both ends of the traction rope pass through the two groups of pulleys and are fixedly connected to the two ends of the platform.

[0014] Furthermore, the cantilever includes a sliding connection block and a support arm, the outer wall of the column is provided with a vertical slide groove, the sliding connection block is adaptively connected to the vertical slide groove, one end of the support arm is fixedly connected to the sliding connection block, and the other end is connected to the fixed plate extending toward the inner side of the column.

[0015] Furthermore, the lifting mechanism also includes a second hand wheel and a threaded rod, a cavity is provided in the column, and strip-shaped through holes are opened on the opposite side walls, and a mounting plate is provided at the top of the column; the threaded rod can be rotatably arranged in the cavity, and its top end is movably connected to the mounting plate, and the top end of the threaded rod is fixedly connected to the second hand wheel, and a threaded connecting sleeve is sleeved on the threaded rod, and the outer wall of the threaded connecting sleeve passes through the strip through hole and is fixedly connected to the inner wall of the sliding connecting block.

[0016] Furthermore, a pre-tightening screw is provided on the sliding connection block, a positioning hole is provided on the threaded connection sleeve, and the pre-tightening screw passes through the positioning hole and abuts against the threaded rod.

[0017] Furthermore, the movable disc is formed by integrally connecting a semicircular protractor and a straight plate, and clamping plates are respectively fixed at both ends of the straight plate, and a clamping groove is provided in the clamping plate.

[0018] Furthermore, the fixed scale plate is provided with scale lines, and when the 0° scale line on the fixed scale plate coincides with the 0° scale on the semicircular protractor, the straight plate is in a horizontal state, and the rotation angle is 0°.

[0019] Furthermore, scale lines are provided on the outer wall of the column along its length direction, an observation port corresponding to the position of the scale lines is opened on the sliding connection block, and a vernier plate is vertically installed in the observation port, a lead screw is fixedly connected to the top of the vernier plate, the lead screw passes through the top of the observation port and extends to the top of the column, and the lead screw is connected to the top of the observation port through an adjusting nut.

[0020] It can be seen from the above technical solution that compared with the prior art, the present invention has a simple structure, high measurement accuracy, and is very convenient to use. It can check the blade twist angle, cross-sectional width and thickness, and the distance from the leading edge and trailing edge of the cross-section to the blade axis. It has high work efficiency and improves production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0022] Figure 1 It is the front view of the present invention.

[0023] Figure 2 It is a schematic diagram of the local structure of the present invention.

[0024] Figure 3 It is a top view of the present invention.

[0025] in:

[0026] 1-base; 2-platform; 3-column; 4-fixed dial; 5-vernier caliper; 6-moving dial; 7-movable clamping plate; 8-traction rope; 11-flat rail; 12-triangular slide rail; 13-first hand wheel; 14-drum wheel; 15-rotating shaft; 16-pulley; 21-sliding connecting block; 22-support arm; 31-second hand wheel; 32-threaded rod; 33-strip through hole; 34-vernier plate; 35-screw; 36-adjusting nut; 61-clamp. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] In the description of the present invention, it is necessary to understand that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0029] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0030] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0032] The embodiment of the present invention discloses a device for measuring the geometric dimensions of a blade, comprising: a base 1, a platform 2, a lifting mechanism and a measuring assembly; the platform 2 is arranged on the top end surface of the base 1, and the upper end surface of the base 1 is provided with a flat rail 11 and a triangular slide rail 12 parallel to each other along its length direction, and the bottom end of the platform 2 is correspondingly provided with a flat groove and a dovetail groove adapted thereto, so as to realize the sliding connection between the platform 2 and the base 1;

[0033] A traction mechanism is installed below the base 1, and the traction mechanism includes a first hand wheel 13, a drum wheel 14, a rotating shaft 15 and a pulley 16, wherein the rotating shaft 15 is parallel to the width direction of the base 1 and is rotatably installed below the base 1, one end of the rotating shaft 15 is fixed with the first hand wheel 13, the drum wheel 14 is arranged on the rotating shaft 15, a traction rope 8 is wound around the drum wheel 14, two groups of pulleys 16 are symmetrically installed at both ends of the base 1, and both ends of the traction rope 8 pass through the two groups of pulleys 16 and are fixedly connected to both ends of the platform 2, so that the platform 2 can reciprocate along the length direction of the base 1;

[0034] The lifting mechanism includes a column 3 vertically connected to one side of the top of the platform 2, and a cantilever slidably connected to the column 3, and the cantilever reciprocates along the length direction of the column 3;

[0035] The measuring assembly is installed at the end of the cantilever, including a fixed dial 4, a vernier caliper 5 and a moving dial 6. The fixed dial 4 is a fan-shaped structure fixedly installed at the end of the cantilever. The moving dial 6 is arranged concentrically with the fixed dial 4 and is rotatably connected to the fixed dial 4. The moving dial 6 is formed by an integral connection of a semicircular protractor and a straight plate, and clamping plates 61 are respectively fixed at both ends of the straight plate; scale lines are arranged on the fixed dial 4, and when the 0° scale line on the fixed dial 4 coincides with the 0° scale line on the semicircular protractor, the bottom end of the straight plate is in a horizontal state and the rotation angle is 0°; the lower end of the straight plate is fixedly connected to the vernier caliper 5, and both ends of the vernier caliper 5 are slidably connected with a movable clamping plate 7.

[0036] Specifically, the cantilever includes a sliding connection block 21 and a support arm 22. The outer wall of the column 3 is provided with a vertical slide groove. The sliding connection block 21 is adaptively connected to the vertical slide groove. One end of the support arm 22 is fixedly connected to the sliding connection block 21, and the other end extends to the inner side of the column 3 and is connected to the fixed plate 4.

[0037] In one embodiment, the lifting mechanism also includes a second hand wheel 31 and a threaded rod 32. A cavity is provided in the column 3, and strip-shaped through holes 33 are opened on the opposite side walls. A mounting plate is provided at the top of the column 3. The threaded rod 32 can be rotatably arranged in the cavity, and its top end is movably connected to the mounting plate, and the top end of the threaded rod 32 is fixedly connected to the second hand wheel 31. A threaded connecting sleeve is sleeved on the threaded rod 32, and the outer wall of the threaded connecting sleeve passes through the strip-shaped through hole 33 and is fixedly connected to the inner wall of the sliding connecting block 21.

[0038] In order to further optimize the above solution, a pre-tightening screw is provided on the sliding connection block 21 , and a positioning hole is opened on the threaded connection sleeve. The pre-tightening screw passes through the positioning hole and abuts against the threaded rod 32 , so as to position the height of the sliding connection block 21 .

[0039] In order to further optimize the above scheme and accurately control the lifting and lowering dimensions of the sliding connection block 21, scale lines are arranged on the outer wall of the column 3 along its length direction, and an observation port corresponding to the scale lines is opened on the sliding connection block 21, and a vernier plate 34 is vertically installed in the observation port. The vernier plate 34 is provided with scale lines with higher precision. The precise value can be read out by cooperating with the scale lines of the column 3 and the vernier plate 34. The top of the vernier plate 34 is fixedly connected with a lead screw 35, which passes through the top of the observation port and extends to the top of the column 3. The lead screw 35 is connected to the top of the observation port by an adjusting nut 36. The vernier plate 34 is moved vertically by adjusting the nut 36 to read out the value, which is similar to the use of a vernier caliper.

[0040] The method for measuring the angle of a blade of the present invention is as follows: the blade is fixed horizontally on a measuring platform, the platform is moved by a first hand wheel, and when it moves to the measured section of the blade, it stops, and at this time, the second hand wheel is shaken to make the sliding connection block move up and down along the column, and when the vernier caliper is about to contact the surface of the measured blade, the auxiliary section template is placed on the dynamic dial, and then the dynamic dial is rotated to make it the same as the actual torsion angle of the cross section of the blade at that location, and after the measured section angle of the blade is reached, the auxiliary section template is attached to the blade, and at this time, the angle reading on the dynamic dial is read, and this reading is the actual value of the angle of the measured blade.

[0041] The method for measuring the blade width is: move the two movable pallets along the main scale respectively. When the movable pallet touches the width of the blade, the scale on the clamp foot coincides with the scale on the main scale. At this time, read the scale reading of the main scale, which is the width value of the measured blade. Similarly, the width value detection method of other sections of the blade is the same.

[0042] The present invention has a simple structure, high measuring accuracy and is very convenient to use. It can inspect the blade twist angle, cross-sectional width and thickness, and the distance from the leading edge and trailing edge of the cross-sectional area to the blade axis. It has high working efficiency, low cost and short production cycle, and meets the use requirements of new product development.

[0043] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0044] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A device for measuring the geometric dimensions of a blade, characterized in that: include: A base (1), wherein a traction mechanism is installed below the base (1); A platform (2), wherein the platform (2) is arranged on the top end surface of the base (1), the platform (2) is connected to the traction mechanism through a traction rope (8), and reciprocates along the length direction of the base (1); the traction mechanism comprises a first hand wheel (13), a drum wheel (14), a rotating shaft (15) and a pulley (16); the rotating shaft (15) is parallel to the width direction of the base (1) and is rotatably installed below the base (1); one end of the rotating shaft (15) is fixed with the first hand wheel (13); the drum wheel (14) is arranged on the rotating shaft (15), the traction rope (8) is wound around the drum wheel (14), two groups of the pulleys (16) are symmetrically installed at two ends of the base (1), and the two ends of the traction rope (8) respectively pass through the two groups of the pulleys (16) and are fixedly connected to the two ends of the platform (2); A lifting mechanism, the lifting mechanism comprising a column (3) vertically connected to one side of the top of the platform (2), and a cantilever slidably connected to the column (3), the cantilever reciprocating along the length direction of the column (3); A measuring assembly is installed at the end of the cantilever, comprising a fixed disc (4), a vernier caliper (5) and a movable disc (6); the fixed disc (4) is a fan-shaped structure fixedly installed at the end of the cantilever; the movable disc (6) is cocentrically arranged with the fixed disc (4) and rotatably connected to the fixed disc (4); the lower end of the movable disc (6) is fixedly connected to the vernier caliper (5); and both ends of the vernier caliper (5) are slidably connected to a movable clamping plate (7).

2. The device for measuring the geometric dimensions of a blade according to claim 1, characterized in that: The upper end surface of the base (1) is provided with mutually parallel flat rails (11) and triangular slide rails (12) along its length direction, and the bottom end of the platform (2) is provided with corresponding flat grooves and dovetail grooves adapted thereto.

3. The device for measuring geometric dimensions of a blade according to claim 1, characterized in that: The cantilever comprises a sliding connection block (21) and a support arm (22); the outer wall of the column (3) is provided with a vertical slide groove; the sliding connection block (21) is adaptively connected to the vertical slide groove; one end of the support arm (22) is fixedly connected to the sliding connection block (21), and the other end extends toward the inner side of the column (3) and is connected to the fixed plate (4).

4. The device for measuring geometric dimensions of a blade according to claim 3, characterized in that: The lifting mechanism further comprises a second hand wheel (31) and a threaded rod (32); a cavity is provided in the column (3), and strip-shaped through holes (33) are provided on opposite side walls; a mounting plate is provided at the top of the column (3); the threaded rod (32) is rotatably arranged in the cavity, and its top end is movably connected to the mounting plate, and the top end of the threaded rod (32) is fixedly connected to the second hand wheel (31); a threaded connection sleeve is sleeved on the threaded rod (32), and the outer wall of the threaded connection sleeve passes through the strip-shaped through hole (33) and is fixedly connected to the inner wall of the sliding connection block (21).

5. The device for measuring geometric dimensions of a blade according to claim 4, characterized in that: The sliding connection block (21) is provided with a pre-tightening screw, the threaded connection sleeve is provided with a positioning hole, and the pre-tightening screw passes through the positioning hole and abuts against the threaded rod (32).

6. The device for measuring geometric dimensions of a blade according to claim 1, characterized in that: The movable disc (6) is formed by integrally connecting a semicircular protractor and a straight plate, and clamping plates (61) are respectively fixed at both ends of the straight plate.

7. The device for measuring geometric dimensions of a blade according to claim 6, characterized in that: The fixed scale plate (4) is provided with scale lines, and when the 0° scale line on the fixed scale plate (4) coincides with the 0° scale line on the semicircular protractor, the straight plate is in a horizontal state and the rotation angle is 0°.

8. The device for measuring geometric dimensions of a blade according to claim 5, characterized in that: The outer wall of the column (3) is provided with scale lines along its length direction, the sliding connection block (21) is provided with an observation port corresponding to the scale lines, and a vernier plate (34) is vertically installed in the observation port, the top of the vernier plate (34) is fixedly connected with a lead screw (35), the lead screw (35) passes through the top of the observation port and extends to the top of the column (3), and the lead screw (35) is connected to the top of the observation port through an adjusting nut (36).

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