Blade gravity center measuring device and measuring system thereof

Abstract

The embodiment of the utility model relates to the technical field of unmanned aerial vehicles, and particularly discloses a blade gravity center measuring device and a measuring system thereof, the blade gravity center measuring device comprises a housing, the housing is provided with a mounting cavity and an opening communicated with the mounting cavity, and the mounting cavity comprises a first side wall and a second side wall which are oppositely arranged along a first direction; the first supporting seat is mounted on the first side wall, and one end of each paddle is mounted on the first supporting seat; the second supporting seat is mounted on the second side wall, and the other end of the paddle is detachably mounted on the second supporting seat; the measuring module comprises at least three telescopic assemblies and at least three gravity sensors, the telescopic assemblies are connected with the cavity bottom of the mounting cavity, one ends of the gravity sensors are connected with the telescopic assemblies, the other ends of the gravity sensors are connected to the cavity bottom of the mounting cavity, the telescopic assemblies comprise telescopic rods, and the telescopic rods can move in the second direction; and the sliding assembly is arranged at the cavity bottom of the mounting cavity and is connected with the gravity sensor. According to the embodiment of the utility model, the measurement precision of the gravity center of the paddle can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of unmanned aerial vehicles, in particular to a blade gravity center measuring device and a measuring system thereof. Background Art

[0002] In the related art, rotary-wing vertical take-off and landing aircraft such as drones, helicopters, and multi-rotor aircraft include rotors, which are usually composed of multiple blades. Before installing the multiple blades, the center of gravity needs to be measured to ensure the flight performance and safety of the aircraft. In the prior art, the center of gravity is usually measured using the three-point support method. The three support points are fixed on the base, the blades are placed on the three support points, and the gravity of the three support points is measured using a pressure sensor, and the center of gravity position is calculated using the relevant torque formula.

[0003] The inventor of the utility model found in the process of realizing the utility model that: since the three supporting points are in fixed positions, in order to ensure the measurement accuracy, it is often necessary to measure other positions on the blade. At this time, the position of the blade needs to be moved manually, which is inconvenient. Utility Model Content

[0004] In view of the above problems, the embodiments of the present utility model provide a blade center of gravity measurement device and a blade center of gravity measurement system, which overcome the above problems or at least partially solve the above problems.

[0005] According to one aspect of the utility model, a blade center of gravity measuring device is provided, including a housing, provided with an installation cavity and an opening connected to the installation cavity, the installation cavity including a first side wall and a second side wall arranged opposite to each other along a first direction; a first support seat, installed on the first side wall, one end of the blade is installed on the first support seat; a second support seat, installed on the second side wall, the second support seat and the first support seat are arranged opposite to each other along the first direction, and the other end of the blade is detachably installed on the second support seat; a measuring module, the measuring module including at least three telescopic components and at least three gravity sensors, the The telescopic component is located below the blade, the telescopic component is connected to the bottom of the installation cavity, the gravity sensor is arranged at the lower end of the telescopic component, the gravity sensor is located between the telescopic component and the bottom of the installation cavity, the telescopic component includes a telescopic rod, the telescopic rod can move in a second direction, the second direction is perpendicular to the first direction, and the second direction is along the vertical direction; a sliding component is arranged at the bottom of the installation cavity, the side of the sliding component away from the bottom of the installation cavity is connected to the gravity sensor, and the sliding component can drive the telescopic component and the gravity sensor to slide along the first direction.

[0006] In an alternative manner, the sliding assembly includes a slide rail and a slider. The slide rail is disposed at the bottom of the installation cavity and extends along a second direction. One side of the slider is mounted on the slide rail, and the slider is slidable on the slide rail. The other side of the slider is connected to the gravity sensor on the measurement module.

[0007] In an alternative manner, the telescopic assembly further includes a sleeve and a locking member. One end of the telescopic rod is inserted into the sleeve, and the telescopic rod is movable relative to the sleeve along the second direction. The locking member is disposed at an end of the sleeve facing away from the sliding assembly. The locking member is sleeved on the telescopic rod, and the locking member can lock the telescopic rod. After the other end of the telescopic rod moves a preset distance along the second direction, the locking member can lock the telescopic rod.

[0008] In an alternative manner, the blade gravity measurement device includes a first lead screw assembly. The first lead screw assembly is disposed on the first side wall and is connected to the first support seat. The first lead screw assembly can drive the first support seat to move along the second direction. The blade gravity measurement device further includes a second lead screw assembly. The second lead screw assembly is disposed on the second side wall and is connected to the second support seat. The second lead screw assembly can drive the second support seat to move along the second direction, and the second lead screw assembly moves synchronously with the first lead screw assembly.

[0009] In an alternative manner, a plurality of support columns are disposed on the first support seat. The support columns abut against the tail end of the blade, and a rubber head is disposed at an end of the support column that supports the blade. The rubber head abuts against the tail end of the blade.

[0010] In an alternative manner, the blade gravity measurement device further includes a positioning assembly. The positioning assembly is disposed on the second support seat. A plurality of positioning holes are disposed at the top end of the blade. The positioning assembly includes a positioning seat, a connecting plate, and a plurality of positioning screws. A positioning groove, a first opening, and a second opening communicating with the positioning groove are disposed on the positioning seat. The first opening and the second opening are spaced apart along a first direction. The top end of the blade is installed in the positioning groove from the first opening, and a part of the top end of the blade extends out from the second opening. The connecting plate is connected to a side of the positioning seat close to the second opening. A preset space is provided between the connecting plate and the positioning seat. The preset space communicates with the positioning groove. A part of the top end of the blade is located in the preset space. The number of the positioning screws corresponds to the number of the positioning holes. One end of the positioning screw penetrates through the connecting plate and is connected to the positioning hole on the blade.

[0011] In an alternative manner, the notch of the positioning groove faces the second direction; the positioning assembly further includes a fixing plate which covers the notch of the positioning groove, and the fixing plate is detachably connected to the positioning seat.

[0012] In an alternative manner, a limiting groove is provided on the fixing plate, and the notch of the limiting groove faces the third direction, where the third direction is perpendicular to the first direction and the second direction; the positioning assembly further includes a limiting block, a limiting post and a lock. The limiting block is located on the side of the positioning seat. One end of the limiting post is rotatably connected to the limiting block, and the limiting post rotates around the first direction as the rotation axis. The other end of the limiting post can be inserted into the limiting groove from the third direction, and the lock is installed at the other end of the limiting post, and the lock abuts against the side of the fixing plate away from the positioning seat.

[0013] In an alternative manner, the blade gravity center measuring device further includes a control assembly, which is electrically connected to the sliding assembly and the measuring module, and the control assembly can be used to control the movement of the sliding assembly and the measuring module.

[0014] According to another aspect of the present invention, there is provided a blade gravity center measuring system, including

[0015] The beneficial effects of the embodiments of the present utility model are as follows: Different from the prior art, the embodiments of the present utility model are provided with a casing, a first support seat, a second support seat, a measurement module, and a sliding component. Among them, the casing is provided with an installation cavity and an opening communicating with the installation cavity. The installation cavity includes a first side wall and a second side wall oppositely arranged along a first direction. The first support seat is installed on the first side wall, one end of the paddle is installed on the first support seat, the second support seat is installed on the second side wall, the second support seat and the first support seat are oppositely arranged along the first direction, the other end of the paddle is detachably installed on the second support seat. The measurement module includes at least three telescopic components and at least three gravity sensors. The telescopic components are located below the paddle, the telescopic components are connected to the bottom of the installation cavity, one end of the gravity sensor is connected to the telescopic component, the other end of the gravity sensor is connected to the bottom of the installation cavity, and the gravity sensor is located between the telescopic component and the bottom of the installation cavity. The telescopic component includes a telescopic rod, and the telescopic rod can move in a second direction to a preset position to support the paddle. The second direction is perpendicular to the first direction, and the second direction is along the vertical direction. The sliding component is arranged on the bottom of the installation cavity, and one side of the sliding component facing away from the bottom of the installation cavity is connected to the gravity sensor. The sliding component can drive the telescopic component and the gravity sensor to slide along the first direction. With such a setting, the user can use the first support seat and the second support seat to support the paddle, and use the sliding component to slide the telescopic component and the gravity sensor along the first direction to different measurement positions. Compared with the prior art, the movement of the paddle can be reduced, and the three telescopic rods on the measurement module are no longer in fixed positions. The positions of the support points of the three telescopic rods on the paddle can be adjusted by the user according to actual needs to ensure the measurement accuracy of the center of gravity of the paddle. Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions in the specific embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. In all the drawings, similar elements or parts are generally denoted by similar reference numerals. In the drawings, the elements or parts do not necessarily draw according to the actual scale.

[0017] Figure 1 is a schematic view of the overall structure of the paddle center of gravity measuring device according to an embodiment of the present utility model from one angle;

[0018] Figure 2 is a schematic view of the overall structure of the paddle center of gravity measuring device according to an embodiment of the present utility model from another angle;

[0019] Figure 3 is Figure 2Schematic diagram of the enlarged structure at position A in

[0020] Figure 4 It is another perspective schematic diagram of the overall structure of the blade gravity center measuring device according to an embodiment of the present utility model;

[0021] Figure 5 Is Figure 4 Schematic diagram of the enlarged structure at position C in

[0022] Figure 6 Is Figure 2 Schematic diagram of the enlarged structure at position B in

[0023] Figure 7 It is another perspective schematic diagram of the overall structure of the blade gravity center measuring device according to an embodiment of the present utility model. Detailed implementation manners

[0024] For the convenience of understanding the present utility model, the present utility model will be described in more detail below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is expressed as "fixed to" another element, it can be directly on the other element, or there can be one or more intermediate elements therebetween. When an element is expressed as "connected to" another element, it can be directly connected to the other element, or there can be one or more intermediate elements therebetween. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this specification are only for the purpose of illustration.

[0025] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by those skilled in the technical field to which the present utility model belongs. The terms used in this specification in the description of the present utility model are only for the purpose of describing specific embodiments and are not used to limit the present utility model. The term "and / or" used in this specification includes any and all combinations of one or more of the related listed items.

[0026] In addition, the technical features involved in different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0027] It should be noted that: The embodiments of the present application are applied to the blades of the upper rotor of an aircraft, and the rotor includes blade 100. It can be understood that the embodiments of the present application can also be applied to the blades of other devices, such as: propeller blades, wind turbine blades, and the like.

[0028] Please refer to Figure 1 And Figure 2, the blade gravity center measuring device 1000 includes a housing 10, a first support base 20, a second support base 30, a measuring module 40, a sliding assembly 50, a positioning assembly 60, a first lead screw assembly 70, a second lead screw assembly 80, and a control assembly 90. Among them, the first support base 20 and the second support base 30 are both arranged inside the housing 10. The first support base 20 and the second support base 30 are used to support both ends of the above-mentioned blade 100, so as to install the blade 100 inside the housing 10. The measuring module 40 is arranged below the blade 100. The measuring module 40 is used to measure the gravity of at least three support points on the blade 100. The sliding assembly 50 is connected to the measuring module 40. The sliding assembly 50 can drive the measuring module 40 to slide in the first direction X. The positioning assembly 60 is arranged on the second support base 30. The positioning assembly 60 is used to position and limit the blade 100. The first lead screw assembly 70 is connected to the first support base 20. The first lead screw assembly 70 can drive the first support base 20 to move along the second direction Z. The second lead screw assembly 80 is connected to the second support base 30. The second lead screw assembly 80 can drive the second support base 30 to move along the second direction Z. The control assembly 90 is electrically connected to the measuring module 40, the sliding assembly 50, the first lead screw assembly 70, and the second lead screw assembly 80. The following will specifically describe the housing 10, the first support base 20, the second support base 30, the measuring module 40, the sliding assembly 50, the positioning assembly 60, the first lead screw assembly 70, the second lead screw assembly 80, and the control assembly 90.

[0029] To better illustrate the structure of the blade gravity center measuring device 1000, the structure of the blade gravity center measuring device 1000 will be described in combination with the X, Y, and Z axes. The X, Y, and Z axes are perpendicular to each other. The first direction is along the X-axis direction, the second direction is along the Z-axis direction, and the third direction is along the Y-axis direction. Among them, the first direction X is the length extension direction of the blade 100, and the second direction Z is the vertical direction.

[0030] Regarding the above-mentioned housing 10, as Figure 1 and Figure 2As shown, the housing 10 is provided with an installation cavity 10a and an opening 10b communicating with the installation cavity 10a. The installation cavity 10a includes a first side wall 10c and a second side wall 10d oppositely arranged along the first direction X. The housing 10 includes a first side plate 101, a top plate 102, a second side plate 103, and a bottom plate 104 connected in sequence. The first side plate 101, the top plate 102, the second side plate 103, and the bottom plate 104 enclose to form the installation cavity 10a. The first support seat 20 is installed on the first side wall 10c, the second support seat 30 is installed on the second side wall 10d, and the blade 100 can be installed into the installation cavity 10a from the opening 10b. Optionally, the first side wall 10c is located on the first side plate 101, and the second side wall 10d is located on the second side plate 103.

[0031] For the above-mentioned first support seat 20 and second support seat 30, as Figure 1 and Figure 2 shown, the first support seat 20 is installed on the first side wall 10c, one end of the blade 100 is installed on the first support seat 20, the second support seat 30 is installed on the second side wall 10d, the second support seat 30 and the first support seat 20 are oppositely arranged along the first direction X, and the other end of the blade 100 is detachably installed on the second support seat 30, so as to realize the installation of the blade 100.

[0032] In some embodiments, please refer to Figure 3 together. A plurality of support columns 201 are arranged on the first support seat 20. The support columns 201 abut against the tail end of the blade 100, and a rubber head 2011 is arranged at the end of the support column 201 that supports the blade 100. The rubber head 2011 abuts against the tail end of the blade 100. The rubber head 2011 can reduce the contact friction between the support column 201 and the blade 100, and further reduce the wear of the support column 201 on the blade 100. Among them, a plurality of insertion holes 202 are arranged on the first support seat 20, and the support columns 201 are inserted into the insertion holes 202 to realize the detachable installation between the support columns 201 and the first support seat 20, which is convenient for the installation and replacement of the support columns 201.

[0033] For the above-mentioned first lead screw assembly 70 and second lead screw assembly 80, as Figure 1 、 Figure 2 and Figure 4As shown, the first screw assembly 70 is arranged on the first side wall 10c, the first screw assembly 70 is connected to the first support seat 20, the first screw assembly 70 can drive the first support seat 20 to move along the second direction Z, the second screw assembly 80 is arranged on the second side wall 10d, the second screw assembly 80 is connected to the second support seat 30, the second screw assembly 80 can drive the second support seat 30 to move along the second direction Z, and the second screw assembly 80 moves synchronously with the first screw assembly 70.

[0034] For details, please refer to Figure 5 The first screw rod assembly 70 includes a motor 701, a screw rod 702, a movable rail 703, a movable block 704 and a connecting block 705. The movable rail 703 is installed on the first side wall 10c through a frame, and the movable rail 703 extends along the second direction Z. The movable block 704 is installed on the side of the movable rail 703 away from the first side wall 10c, and the movable block 704 can move on the movable rail 703 along the second direction Z. The motor 701 is fixed to the frame, the screw rod 702 is connected to the output end of the motor 701, and the screw rod 702 extends along the second direction Z. The connecting block 705 is sleeved on the screw rod 702, and the connecting block 705 is threadedly connected to the screw rod 702. One side of the connecting block 705 is connected to the movable block 704, and the other side of the connecting block 705 is connected to the first supporting seat 20. The screw rod 702 can drive the connecting block 705 to move along the second direction Z. The motor 701 is used to drive the screw rod 702 to rotate, and the screw rod 702 drives the connecting block 705 to move in the second direction Z, and then the connecting block 705 drives the first supporting seat 20 to move in the second direction Z.

[0035] It should be noted that the second screw assembly 80 has the same structure as the first screw assembly 70. The second screw assembly 80 is used to drive the second support seat 30 to move along the second direction Z, and the second screw assembly 80 moves synchronously with the first screw assembly 70. The structure of the second screw assembly 80 can refer to the structure of the first screw assembly 70, and will not be repeated here.

[0036] For the above positioning assembly 60, Figure 1 , Figures and Figure 6As shown, the positioning assembly 60 is disposed on the second support seat 30 , and the positioning assembly 60 is used to position the blade 100 . The positioning assembly 60 includes a positioning seat 601, a connecting plate 602, and a positioning screw 603. The positioning seat 601 is provided with a positioning groove 601a and a first opening and a second opening communicating with the positioning groove 601a. The first opening and the second opening are arranged at intervals along the first direction X. The top end of the blade 100 is installed in the positioning groove 601a from the first opening, and the top end of the blade 100 extends from the second opening. The connecting plate 602 is connected to a side of the positioning seat 601 close to the second opening. A preset space is provided between the connecting plate 602 and the positioning seat 601. The preset space is communicated with the positioning groove 601a. The top end of the blade 100 is located in the preset space. The number of the positioning screws 603 corresponds to that of the positioning holes. One end of the positioning screw 603 passes through the connecting plate 602 and is connected to the positioning hole on the blade 100, thereby realizing the positioning of the blade 100. The positioning hole is located at the top end of the blade 100. Optionally, in order to more stably limit the top end of the blade 100 in the positioning groove 601a, the positioning groove 601a is V-shaped.

[0037] In some embodiments, the notch of the positioning slot 601a faces the second direction Z, and the positioning assembly 60 also includes a fixing plate 604, which covers the notch of the positioning slot 601a, and the fixing plate 604 is detachably connected to the positioning seat 601, and the fixing plate 604 is used to limit the top of the blade 100 to the positioning slot 601a to prevent the top of the blade 100 from moving along the second direction Z.

[0038] In some embodiments, a limiting groove 6041 is provided on the fixed plate 604, and the notch of the limiting groove 6041 faces the third direction Y. The positioning assembly 60 also includes a limiting block 605, a limiting column 606 and a locking buckle 607. The limiting block 605 is located on the side of the positioning seat 601, and one end of the limiting column 606 is rotatably connected to the limiting block 605. The limiting column 606 rotates with the first direction X as the rotation axis. The other end of the limiting column 606 can be inserted into the limiting groove 6041 from the third direction Y. The locking buckle 607 is installed on the other end of the limiting column 606, and the locking buckle 607 abuts against the side of the fixed plate 604 away from the positioning seat 601, thereby fixing the fixed plate 604 on the positioning seat 601. It is understandable that the detachable connection method between the fixing plate 604 and the positioning seat 601 is not limited to the above, and may also be other methods, such as screw connection, snap connection, riveting, etc.

[0039] For the above-mentioned measurement module 40, as Figure 1 and Figure 7 shown, the measurement module 40 includes at least three telescopic components 41 and at least three gravity sensors 42. The telescopic components 41 are located below the blade 100. The telescopic components 41 are connected to the bottom of the installation cavity 10a. One end of the gravity sensor 42 is connected to the telescopic component 41, and the other end of the gravity sensor 42 is connected to the bottom of the installation cavity 10a. The gravity sensor 42 is located between the telescopic component 41 and the bottom of the installation cavity 10a.

[0040] Specifically, the telescopic component 41 includes a telescopic rod 411, a sleeve 412 and a locking member 413. One end of the telescopic rod 411 is inserted into the sleeve 412. The telescopic rod 411 can move relative to the sleeve 412 along the second direction Z. The telescopic rod 411 can move to a preset position along the second direction Z to support the blade 100. The locking member 413 is arranged at one end of the sleeve 412 facing away from the sliding component 50. The locking member 413 is sleeved on the telescopic rod 411. The locking member 413 can lock the telescopic rod 411. After the other end of the telescopic rod 411 moves a preset distance along the second direction Z, the locking member 413 can lock the telescopic rod 411. The telescopic rod 411 on a single telescopic component 41 moves a preset distance along the second direction Z to support the blade 100. The gravity sensor 42 located on the telescopic component 41 can measure the gravity magnitude of this support point. The three telescopic components 41 obtain the gravity magnitudes G1, G2, and G3 of the three support points. It is known that the weight of the blade is G, and the coordinates of the three support points in the entire housing 10 are (X1, Y1), (X2, Y2), and (X3, Y3) respectively. Assuming the center of gravity coordinates of the blade are (X, Y), according to GX = G1X1 + G2X2 + G3X3 and GY = G1Y1 + G2Y2 + G3Y3, the center of gravity coordinates of the blade can be calculated.

[0041] It can be understood that: to ensure that the telescopic rod 411 can perform telescopic movement along the second direction Z, the telescopic movement principle of the telescopic component 41 is not limited to the above, and it can also be other principles, such as: the movement principle of a piston rod and a cylinder, the movement principle of the sliding connection of the telescopic rod 411, the movement principle of the telescopic rod 411 and a hydraulic cylinder, etc.

[0042] For the above-mentioned sliding component 50 and control component 90, as Figure 1 and Figure 7As shown, the sliding assembly 50 is arranged at the bottom of the installation cavity 10a, and the side of the sliding assembly 50 away from the bottom of the installation cavity 10a is connected to the gravity sensor 42. The sliding assembly 50 can drive the telescopic assembly 41 and the gravity sensor 42 to slide along the first direction X. The control assembly 90 is electrically connected to the sliding assembly 50 and the measuring module 40, and the control assembly 90 can be used to control the movement of the sliding assembly 50 and the measuring module 40. Among them, under the action of the sliding assembly 50, the telescopic assembly 41 can move to different positions along the first direction X to support the blade 100, and form at least three supporting points at different positions, and calculate the gravity of the corresponding supporting points through the gravity sensor 42, thereby improving the accuracy of measuring the center of gravity of the blade 100.

[0043] Specifically, the sliding assembly 50 includes a slide rail 501 and a slider 502. The slide rail 501 is arranged at the bottom of the installation cavity 10a, and the slide rail 501 extends along the second direction Z. One side of the slider 502 is installed on the slide rail 501, and the slider 502 can slide on the slide rail 501. The other side of the slider 502 is connected to the gravity sensor 42 on the measuring module 40. The slider 502 can be used to slide on the slide rail 501. The slider 502 is connected to the gravity sensor 42, and then the slider 502 can drive the gravity sensor 42 to slide in the first direction X. The gravity sensor 42 is connected to the telescopic assembly 41, so as to drive the telescopic assembly 41 to slide in the first direction X.

[0044] In an embodiment of the present utility model, a machine shell 10, a first support seat 20, a second support seat 30, a measurement module 40, and a sliding assembly 50 are provided. Among them, the machine shell 10 is provided with an installation cavity 10a and an opening 10b communicating with the installation cavity 10a. The installation cavity 10a includes a first side wall 10c and a second side wall 10d oppositely arranged along a first direction X. The first support seat 20 is installed on the first side wall 10c, one end of the paddle blade 100 is installed on the first support seat 20, the second support seat 30 is installed on the second side wall 10d, the second support seat 30 and the first support seat 20 are oppositely arranged along the first direction X, the other end of the paddle blade 100 is detachably installed on the second support seat 30. The measurement module 40 includes at least three telescopic assemblies 41 and at least three gravity sensors 42. The telescopic assemblies 41 are located below the paddle blade 100, the telescopic assemblies 41 are connected to the bottom of the installation cavity 10a, one end of the gravity sensor 42 is connected to the telescopic assembly 41, the other end of the gravity sensor 42 is connected to the bottom of the installation cavity 10a, the gravity sensor 42 is located between the telescopic assembly 41 and the bottom of the installation cavity 10a. The telescopic assembly 41 includes a telescopic rod 411, and the telescopic rod 411 can move to a preset position in a second direction Z to support the paddle blade 100. The second direction Z is perpendicular to the first direction X, and the second direction Z is along the vertical direction. The sliding assembly 50 is arranged at the bottom of the installation cavity 10a, and one side of the sliding assembly 50 facing away from the bottom of the installation cavity 10a is connected to the gravity sensor 42. The sliding assembly 50 can drive the telescopic assembly 41 and the gravity sensor 42 to slide along the first direction X. With such a setting, the user can use the first support seat 20 and the second support seat 30 to support the paddle blade 100, and use the sliding assembly 50 to slide the telescopic assembly 41 and the gravity sensor 42 along the first direction X to different measurement positions. Compared with the prior art, the movement of the paddle blade 100 can be reduced, and the three telescopic rods 411 on the measurement module 40 are no longer in fixed positions. The positions of the support points of the three telescopic rods 411 on the paddle blade 100 can be adjusted according to actual needs to ensure the measurement accuracy of the center of gravity of the paddle blade 100.

[0045] The present utility model also provides a paddle blade center of gravity measurement system, including the paddle blade center of gravity measurement device 1000 as described above. The functions and structures of the paddle blade center of gravity measurement device 1000 can be referred to the above embodiments, and will not be elaborated here one by one.

[0046] The above are only embodiments of the present utility model, and do not thus limit the patent scope of the present utility model. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied in other related technical fields, shall equally be included within the patent protection scope of the present utility model.

Claims

1. A blade gravity center measuring device, characterized in that, include: A housing, provided with a mounting cavity and an opening communicating with the mounting cavity, wherein the mounting cavity includes a first side wall and a second side wall oppositely disposed along a first direction; A first support seat is mounted on the first side wall, and one end of the blade is mounted on the first support seat; A second support seat is installed on the second side wall, the second support seat is arranged opposite to the first support seat along a first direction, and the other end of the blade is detachably installed on the second support seat; A measuring module, wherein the measuring module comprises at least three telescopic components and at least three gravity sensors, wherein the telescopic component is located below the propeller blade, the telescopic component is connected to the bottom of the mounting cavity, one end of the gravity sensor is connected to the telescopic component, the other end of the gravity sensor is connected to the bottom of the mounting cavity, the gravity sensor is located between the telescopic component and the bottom of the mounting cavity, the telescopic component comprises a telescopic rod, the telescopic rod can be moved in a second direction to a preset position to support the propeller blade, the second direction is perpendicular to the first direction, and the second direction is along a vertical direction; A sliding component is arranged at the bottom of the installation cavity. The side of the sliding component facing away from the bottom of the installation cavity is connected to the gravity sensor. The sliding component can drive the telescopic component and the gravity sensor to slide along the first direction.

2. The blade center of gravity measuring device according to claim 1, characterized in that: The sliding assembly includes a slide rail and a slider, the slide rail is arranged at the bottom of the installation cavity, the slide rail extends along the second direction, one side of the slider is installed on the slide rail, and the slider can slide on the slide rail, and the other side of the slider is connected to the gravity sensor on the measurement module.

3. The blade center of gravity measuring device according to claim 1, characterized in that: The telescopic assembly also includes a sleeve and a locking piece. One end of the telescopic rod is inserted into the sleeve. The telescopic rod can move relative to the sleeve along the second direction. The locking piece is arranged at the end of the sleeve away from the sliding assembly. The locking piece is sleeved on the telescopic rod. The locking piece can lock the telescopic rod. After the other end of the telescopic rod moves a preset distance along the second direction, the locking piece can lock the telescopic rod.

4. The blade center of gravity measuring device according to claim 1, characterized in that: The blade center of gravity measuring device comprises a first screw assembly, the first screw assembly is arranged on the first side wall, the first screw assembly is connected to the first support seat, and the first screw assembly can drive the first support seat to move along the second direction; The blade center of gravity measuring device also includes a second screw assembly, which is arranged on the second side wall and connected to the second support seat. The second screw assembly can drive the second support seat to move along the second direction, and the second screw assembly moves synchronously with the first screw assembly.

5. The blade center of gravity measuring device according to claim 1, characterized in that: A plurality of support columns are provided on the first support base. The support columns abut against the tail end of the blade, and a rubber head is provided at one end of the support column for supporting the blade, and the rubber head abuts against the tail end of the blade.

6. The blade gravity center measuring device according to claim 1, wherein the blade gravity center measuring device further comprises a positioning assembly, and the positioning assembly is arranged on the second support base; a plurality of positioning holes are provided at the top end of the blade; The positioning assembly includes a positioning seat, a connecting plate and a plurality of positioning screws. A positioning groove, a first opening and a second opening communicating with the positioning groove are provided on the positioning seat. The first opening and the second opening are arranged at intervals in a first direction. The top end of the blade is installed in the positioning groove from the first opening, and a part of the top end of the blade extends out from the second opening. The connecting plate is connected to one side of the positioning seat close to the second opening. A preset space is provided between the connecting plate and the positioning seat, and the preset space communicates with the positioning groove. A part of the top end of the blade is located in the preset space. The number of the positioning screws corresponds to that of the positioning holes. One end of the positioning screw penetrates through the connecting plate and is connected to the positioning hole on the blade.

7. The blade gravity center measuring device according to claim 6, wherein the notch of the positioning groove faces the second direction; the positioning assembly further comprises a fixing plate, and the fixing plate covers the notch of the positioning groove, and the fixing plate is detachably connected to the positioning seat.

8. The blade gravity center measuring device according to claim 7, wherein a limiting groove is provided on the fixing plate, and the notch of the limiting groove faces a third direction, and the third direction is perpendicular to the first direction and the second direction; the positioning assembly further comprises a limiting block, a limiting post and a lock. The limiting block is located on the side of the positioning seat. One end of the limiting post is rotatably connected to the limiting block, and the limiting post rotates around the first direction as the rotation axis. The other end of the limiting post can be inserted into the limiting groove from the third direction, and the lock is installed at the other end of the limiting post, and the lock abuts against the side of the fixing plate away from the positioning seat.

9. The blade gravity center measuring device according to claim 1, wherein the blade gravity center measuring device further comprises a control assembly, and the control assembly is electrically connected to the sliding assembly and the measuring module, and the control assembly can be used to control the movement of the sliding assembly and the measuring module.

10. A blade center of gravity measurement system, characterized in that, including the blade gravity center measuring device according to any one of claims 1-9.

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