Reliability testing device for folding paddle

Abstract

The invention relates to a reliability testing device for a folding paddle, belongs to the technical field of unmanned aerial vehicles, and solves the problems that in the prior art, the number of reliability testing devices for paddle folding is small, and reliability testing devices for other parts for aerospace are large in size, complex in structure and not suitable for paddle folding testing. The device comprises a fixing structure, a driving assembly, a folding assembly and a counting assembly. The driving assembly is arranged on the fixing structure and used for driving the folding assembly and the counting assembly. The folding assembly and the counting assembly are arranged on the fixing structure. The folding assembly is used for folding or unfolding the blades of the tested piece, and the counting assembly is used for counting the folding times of the blades. According to the invention, efficient, low-cost and stable reliability test of blade folding can be realized.

Description

Technical Field

[0001] The invention relates to the technical field of unmanned aerial vehicles, and in particular to a reliability testing device for folding blades. Background Art

[0002] Usually, in order to reduce the parking and storage space of small catapult drones, the propeller blades of the drone are usually folded when stored, and then unfolded before launch.

[0003] In order to obtain parameters such as the service life of the blade folding mechanism, it is necessary to conduct reliability testing on the blade folding of the UAV. Currently, there is no special reliability testing device for blade folding; the reliability testing devices for other parts used in aerospace are large in size and complex in structure, and are not suitable for reliability testing of folding blades. Summary of the invention

[0004] In view of the above analysis, an embodiment of the present invention aims to provide a reliability testing device for folding blades, so as to solve the problem that there is currently no reliability testing device for foldable blades, and the reliability testing devices for other components used in aerospace are large in size and complex in structure, and are not suitable for folding blade testing.

[0005] The purpose of the present invention is mainly achieved through the following technical solutions:

[0006] A reliability testing device for a folding blade comprises a fixing structure, a driving component, a folding component and a counting component;

[0007] The driving assembly is arranged on the fixed structure, and is used to drive the folding assembly and the counting assembly;

[0008] The folding assembly and the counting assembly are respectively arranged on a fixed structure; the folding assembly is used to fold or unfold the blade of the tested object, and the counting assembly is used to count the number of times the blade is folded.

[0009] Further, the driving assembly includes a steering gear and a driving component; the driving component is arranged at the output end of the steering gear;

[0010] The driving component includes a driving component body, a first protrusion and a second protrusion; the driving component body is a disc structure; the servo drives the driving component body to rotate around a rotation center located thereon; the first protrusion is formed by extending radially from a portion of the edge of the driving component body; the second protrusion is an arc-shaped ring arranged on the surface edge of the driving component body.

[0011] Furthermore, central angles corresponding to the first protrusion and the second protrusion on the disc-shaped driving component body have overlapping parts and non-overlapping parts.

[0012] Further, the folding assembly includes a connecting assembly and a swinging member;

[0013] One end of the connecting assembly is in contact with the outer periphery of the driving component, and the other end of the connecting assembly is connected to the swinging member;

[0014] One end of the swinging member is hinged to the fixed structure, and the other end of the swinging member is connected to the tested member, so as to unlock or lock the unfolded state of the blade.

[0015] Further, the connection assembly includes a first connection member and a second connection member;

[0016] The first connecting member is an L-shaped rod, which is arranged on one side of the measured object and is hinged to the fixed structure in the middle;

[0017] The second connecting member is a pull rod structure, and the second connecting member is arranged between the first connecting member and the swinging member.

[0018] Further, the folding assembly further comprises a support member; the support member comprises a rotating portion and a supporting portion; the rotating portion can contact the second protruding portion and rotate downward under the drive of the second protruding portion;

[0019] When the rotating part rotates downward, the supporting part tilts upward to support the paddle to rotate upward to a folded state.

[0020] Furthermore, an angle smaller than 90° is formed between an extension line of the rotating portion and the supporting portion.

[0021] Furthermore, the support portion includes a side and a support rod; the side is provided with a plurality of limiting holes for installing the support rod.

[0022] Further, the counting assembly includes a swing rod and a counter;

[0023] One end of the swing rod is a pressing portion, which is used to press the counter to count the number of folding times of the blade; the other end is a return portion, which is used to return the pressing portion to an initial position after counting.

[0024] Further, the swing rod has an arc segment, a radial extension segment and a tangential extension segment;

[0025] The arc segment is a 1 / 4 arc; the radial extension segment is formed by extending one end of the arc segment radially outward; the pressing portion is arranged on the radial extension segment; the tangential extension segment is formed by extending the other end of the arc segment along the tangential direction of the arc segment; the return portion is arranged on the end of the tangential extension segment;

[0026] The hinge of the swing lever is located at the tangential extension section.

[0027] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0028] (1) The reliability testing device for the folding blade provided by the present invention comprises a driving component, a folding component and a counting component which are all arranged in a fixed structure; the driving component drives the folding component to fold and unfold the blade, and the counting component is driven to count the number of times the blade is folded. The device has a simple structure, is easy to operate, has high efficiency and low cost.

[0029] (2) The present invention sets the driving assembly as a servo and a driving component. The driving component is a disc structure, including a driving component body, a first protrusion and a second protrusion. The first protrusion is a radial protrusion, and the second protrusion is a side protrusion perpendicular to its axis. The first protrusion and the second protrusion are driven to rotate by the rotation of the driving component, so as to drive the folding component to fold or unfold the blades and the counting component to count the number of times the blades are folded. The present invention sets the central angles corresponding to the first protrusion and the second protrusion on the driving component body to have overlapping parts and non-overlapping parts, so that the arrangement of the folding component and the counting component on the fixed structure is more reasonable.

[0030] (3) The folding assembly of the present invention includes a connecting member and a swinging member. The end of the connecting member contacts the outer periphery of the driving member. When the end of the connecting member contacts the first protrusion, the displacement of the end changes so that the other end generates an outward force, which is converted into a pulling force on the swinging member to lock or unlock the state of the paddle.

[0031] (4) In the present invention, the support member is provided with a rotating part and a supporting part. By leveraging, when the rotating part contacts the second protrusion and rotates downward with the driving part, the supporting part moves upward to fold the blade upward. The extended line of the rotating part and the supporting part is set at an angle less than 90° to more accurately support the blade. A plurality of limiting holes are set on the side of the supporting part to support blades of various lengths.

[0032] (5) The counting assembly of the present invention includes a swing rod and a counter, and counting is achieved by pressing the counter downward by the swing rod. The swing rod is provided with a pressing part and a return part, the pressing part is used to press the counter, and the return part is used to quickly return the counter after pressing it.

[0033] (6) In order to match the driving component, the present invention provides a swing lever having an arc segment, a radial extension segment and a tangential extension segment. The arc segment is a 1 / 4 arc, and one end of the arc segment extends outward to form a radial extension segment, which is used to set a pressing portion and press the counter to count; the other end of the arc segment extends along the tangential direction to form a tangential extension segment, and a return portion is set at the end thereof, and the hinge of the swing lever is located at the tangential extension segment of the swing lever. The pressing portion and the return portion form a lever effect. The return portion is tilted by pressing the pressing portion, and the pressing portion is tilted and returned by pressing the return portion.

[0034] In the present invention, the above-mentioned technical solutions can also be combined with each other to achieve more preferred combination solutions. Other features and advantages of the present invention will be described in the following content, and some advantages can be obvious from the description or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained through the contents particularly pointed out in the text and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The drawings are only for the purpose of illustrating particular embodiments and are not to be considered limiting of the present invention. Like reference symbols denote like components throughout the drawings.

[0036] Figure 1 It is a structural schematic diagram of a reliability test device of a folding blade with a test piece in an embodiment;

[0037] Figure 2 It is a structural schematic diagram of a reliability test device of a folding blade without a test piece in an embodiment;

[0038] Figure 3 It is a rear view structural schematic diagram of the test device of the embodiment;

[0039] Figure 4 A partial structural schematic diagram of a blade structure of an embodiment;

[0040] Figure 5 is a structural schematic diagram of a fixed structure of an embodiment;

[0041] Figure 6 A schematic structural diagram of a rotating member of an embodiment;

[0042] Figure 7 A schematic diagram of the structure of the connecting member and the swing member of the embodiment;

[0043] Figure 8 is a schematic structural diagram of a support member of an embodiment;

[0044] Fig. 9 A schematic structural diagram of a toggle lever in an embodiment;

[0045] Fig.10A schematic diagram of the structure of the device when the blades of the embodiment are folded;

[0046] Fig.11 It is a schematic diagram of the device structure when the blades of the embodiment are turned away.

[0047] Reference numerals:

[0048] 1-fixed structure, 2-driving assembly, 21-servo, 22-driving component, 221-first protrusion, 222-second protrusion, 3-folding assembly, 31-first connecting member, 311-first protrusion, 32-second connecting member, 33-swinging member, 34-supporting member, 341-rotating part, 342-supporting part, 3421-side, 3422-support rod, 35-first return spring, 36-second return spring, 4-counting assembly, 41-fixed Block, 42-sliding block, 43-swing rod, 431-pressing part, 432-returning part, 433-second protrusion, 434-third protrusion, 44-counter, 441-counter bracket, 442-counter pressing rod, 45-sensor, 5-measured object, 51-hub section, 511-hub, 512-spring, 513-spring pin, 514-pressure rod, 52-blade section, 521-blade, 522-rotating block, 523-pin, 53-leaf spring. DETAILED DESCRIPTION

[0049] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0050] A specific embodiment of the present invention, as Figure 1-Figure 3 As shown, a reliability testing device for a folding blade is disclosed, comprising a fixing structure 1, a driving component 2, a folding component 3 and a counting component 4.

[0051] like Figure 4 As shown, the tested part 5 includes a hub section 51 and a blade section 52. The hub section 51 includes a hub 511, a spring 512, a spring pin 513 and a pressure rod 514. The spring 512 is arranged in the hollow cavity of the hub 511, and the spring pin 513 is arranged on one side of the spring 512. The pressure rod 514 is connected to the spring pin 513, and the spring pin 513 can drive the pressure rod 514 to move to both sides.

[0052] The blade section 52 includes a blade 521, a rotating block 522 and a pin 523. The pin 523 is disposed at the connection between the blade 521 and the hub 511, and the blade 521 can rotate around the pin 523, so that the blade 521 rotates upward or downward.

[0053] The rotating block 522 has two U-shaped grooves in opposite directions, namely a first U-shaped groove and a second U-shaped groove. The first U-shaped groove is used to accommodate the pin 523. When the blade 521 is unfolded, the pressure rod 514 can be inserted into the second U-shaped groove to lock the blade 521 in the unfolded state.

[0054] Furthermore, the tested part 5 also includes a leaf spring 53. One end of the leaf spring 53 is fixed above the hub 511 by a screw, and the other end is suspended. When the blade 521 is unfolded, it is in an unfolded state, and when the blade 521 is folded, it is in an upward bending state together with the blade 521. After the folded state is unlocked, the restoring force of the leaf spring 53 causes the blade 521 to return to the unfolded state.

[0055] When being tested, the hub segment 51 of the tested component 5 is fixed to the fixed structure 1 by a detachable connection method (such as bolt connection).

[0056] like Figure 5 As shown, the fixing structure 1 has a plurality of fixing protrusions for fixing the driving assembly 2 , the folding assembly 3 , the counting assembly 4 and the hub segment 51 of the measured object 5 .

[0057] The driving assembly 2 is arranged at the center of the fixed structure 1, and includes a steering engine 21 and a driving component 22. The steering engine 21 provides power for the device, and the driving component 22 is connected to the output end of the steering engine 21. For example, Figure 6 As shown, the driving component 22 is a disc structure, including a driving component body, a first protrusion 221 and a second protrusion 222. The first protrusion 221 is a radial protrusion, which is formed by extending a portion of the edge of the driving component body in the radial direction; the second protrusion 222 is a lateral protrusion, which is an arc ring arranged on the surface edge of the driving component body, and the arc ring is coaxially arranged with the disc structure of the driving component body. Further, in order to realize that the first protrusion 221 is connected to the first connecting member 31 at the same time, the second protrusion 222 is connected to the support member 34, so that the support member 34 folds the blade 521, the central angles corresponding to the first protrusion 221 and the second protrusion 222 on the driving component body have overlapping parts and non-overlapping parts, so that the arrangement of the folding component and the counting component on the fixed structure is more reasonable. .

[0058] The folding assembly 3 is fixed to the fixed structure 1 and arranged around the tested object 5 to fold or unfold the blade 521. In order to enable the folding assembly 3 to realize the folding or unfolding state of the blade 521 under the drive of the driving assembly 2, the folding assembly 3 includes a connecting assembly and a swinging member 33.

[0059] One end of the connecting component is connected to the swinging member 33, and the other end is in contact with the driving component 22, and the movement of the connecting component is driven by the first protrusion 221; one end of the swinging member 33 is hinged to the fixed structure 1, and the other end is connected to the spring pin 513 of the measured object 5. Driven by the driving component 22, the connecting component drives the swinging member 33 and the spring pin 513 of the measured object 5 to swing left and right to both sides of itself.

[0060] In order not to interfere with the device under test 5, preferably, Figure 7 As shown, the connection assembly includes a first connection member 31 and a second connection member 32. The first connection member 31 is an L-shaped rod, which is arranged on one side of the measured object 5 and is hinged to the fixed structure 1 in the middle, so as to convert the up and down movement generated when one end contacts the first protrusion 221 into the swinging movement to both sides of the other end; the second connection member 32 is a pull rod structure, which is arranged between the first connection member 31 and the swing member 33, and is used to transmit the swinging movement of the first connection member 31 to the swing member 33, so that the swing member 33 pulls or pushes the spring pin 513 of the measured object 5, so that the pressure rod 514 enters or escapes from the second U-shaped groove of the rotating block 522, so as to lock or unlock the unfolded state of the blade 521.

[0061] The first end of the first connecting member 31 that contacts the driving member 22 is provided with a first protrusion 311. The first protrusion 311 contacts the outer periphery of the driving member 22. When the outer periphery in contact with the first protrusion 311 turns from the edge of the non-first protrusion 221 to the edge of the first protrusion 221, due to the increase in the radial radius of the first protrusion 221, the end with the first protrusion 311 moves along the outer periphery and moves in a direction away from the axis of the driving member 22. When the outer periphery turns from the first protrusion 221 to the non-first protrusion 221, due to the decrease in radius, the end with the first protrusion 311 moves along the outer periphery and moves in a direction close to the axis of the driving member 22.

[0062] When the first protrusion 311 starts to contact the first protruding portion 221, the first connecting member 31 swings upward, and the other end of the L-shaped first connecting member 31 moves to the side away from the swinging member 33, and at the same time drives the second connecting member 32 and the swinging member 33 to move in the same direction. The spring pin 513 of the tested object 5 drives the pressure rod 514 to move in the direction close to the second connecting member 32 under the drive of the swinging member 33, compressing the spring 512, and the end of the pressure rod 514 is separated from the second U-shaped groove of the rotating block 522, unlocking the unfolded state of the paddle 521, and the rotating block 522 can rotate freely.

[0063] When the first protrusion 311 is disengaged from the first protruding portion 221, the first connecting member 31 moves downward, and the other end of the L-shaped first connecting member 31 moves toward the side close to the swinging member 33, and at the same time drives the second connecting member 32 and the swinging member 33 to move in the same direction. The spring pin 513 of the tested object 5 drives the pressure rod 514 to move in the direction away from the second connecting member 32 under the drive of the swinging member 33, and the end of the pressure rod 514 enters the second U-shaped groove of the rotating block 522, and when the paddle 521 is in the unfolded state, the unfolded state of the paddle 521 is locked.

[0064] Preferably, the second connecting member 32 is a telescopic structure, with a screw in the middle and connecting rods with internal threads at both ends. The length of the second connecting member 32 can be changed by adjusting the length of the connecting rods at both ends screwed into the screw, so as to adapt to different lengths of the hub 511.

[0065] When the blade 521 is unfolded or folded, it is necessary to support the unfolded or folded state. Further, the folding assembly 3 also includes a support member 34. Figure 8 As shown, the support member 34 is hinged to the fixed structure 1 in the middle, and is used to support the blade 521. The support member 34 has a rotating portion 341 and a supporting portion 342; the rotating portion 341 and the supporting portion 342 are respectively arranged on both sides of the hinge.

[0066] Exemplarily, the rotating portion 341 has a U-shaped groove, the middle of which is used to accommodate the second protruding portion 222. The rotating portion 341 can contact with the second protruding portion 222 and rotate under the drive of the second protruding portion 222 due to the friction force.

[0067] The support portion 342 has a side 3421 and a support rod 3422. The support rod 3422 and the two side 3421 form a frame structure to support the blade 521. Further, the outer periphery of the support rod 3422 is wrapped with a buffer pad to prevent the blade 521 from being damaged by collision during the folding process of the blade 521. The two side 3421 of the support portion 342 have a plurality of limiting holes for installing the support rod 3422 to accommodate blades 521 of different lengths.

[0068] Furthermore, in order for the support portion 342 to fold the paddle 521 when the rotating portion 341 rotates with the second protruding portion 222 , an angle smaller than 90° is provided between the extended line of the rotating portion 341 and the support portion 342 .

[0069] The driving component 22 rotates until the second protrusion 222 reaches the rotating portion 341, and the rotating portion 341 begins to rotate downward with the second protrusion 222. Under the action of the lever, the supporting portion 342 tilts upward, pushing the paddle 521 to rotate upward. After the paddle 521 is folded to 90°, the rotating portion 341 disengages from the second protrusion 222.

[0070] Furthermore, the folding assembly 3 further includes a first return spring 35 and a second return spring 36. The first return spring 35 connects the end of the first connecting member 31 and the fixing structure 1, and is used to return the first connecting member 31. The second return spring 36 connects the support member 34 and the fixing structure 1, and is used to return the support member 34.

[0071] The counting assembly 4 is disposed on the other side of the driving assembly 2 and is used to count the number of times the blades 521 are folded. The counting assembly 4 includes a swinging rod 43 and a counter 44.

[0072] The swing rod 43 is located at the lower part of the driving assembly 2 and is hinged to the fixed structure 1 in the middle. Both ends of the swing rod 43 can rotate around the middle hinge.

[0073] like Fig. 9 As shown, one end of the swing rod 43 is a pressing portion 431 for pressing the counter 44 to count the number of folding times of the blade 521; the other end is a return portion 432 for returning the pressing portion 431 to the initial position after counting.

[0074] Preferably, in order to match the driving component 22, the swing lever 43 has an arc segment, a radial extension segment and a tangential extension segment. The arc segment is a 1 / 4 arc, and the arc is concentric with the driving component body; the radial extension segment is formed by extending one end of the arc segment radially outward, and is a pressing portion 431; the tangential extension segment is formed by extending the other end of the arc segment along the tangential direction, and is a return portion 432. The hinge of the swing lever 43 is located at the tangential extension segment of the swing lever 43.

[0075] In order to enable the swing lever 43 to realize the counting function under the drive of the driving component 22, the swing lever 43 is provided with a second protrusion 433. The second protrusion 433 contacts the outer peripheral edge of the driving component 22. When the second protrusion 433 contacts the edge of the driving component body, the position of the second protrusion 433 does not change, and the state of the swing lever 43 does not change; when the second protrusion 433 contacts the edge of the first protrusion 221, the second protrusion 433 moves downward, causing the pressing portion 431 to move downward.

[0076] The counter 44 is fixed to the fixed structure 1 through a counter bracket 441, and the counter 44 is disposed below the pressing portion 431. The counter 44 has a counter pressing rod 442, and the counter 44 counts by pressing the counter pressing rod 442 downward through the pressing portion 431.

[0077] Furthermore, the swing lever 43 is also provided with a third protrusion 434 . The second protrusion 433 and the third protrusion 434 are respectively provided at two sides of the hinge, and the third protrusion 434 is provided at the end of the return portion 432 .

[0078] Furthermore, the counting assembly 4 further comprises a fixed block 41 and a sliding block 42. The fixed block 41 is vertically fixed to the fixed structure 1; the sliding block 42 is arranged inside the fixed block 41 and can slide up and down inside the fixed block 41.

[0079] In order to make the pressing part 431 return to its original position after the counter 44 counts, the third protrusion 434 of the return part 432 is arranged to contact the sliding block 42. When the return part 432 moves upward, the third protrusion 434 pushes the sliding block 42 upward, so that the sliding block 42 moves upward. When the return part 432 moves downward, under the action of its own gravity, the sliding block 42 slides downward inside the fixed block 41 and presses the return part 432, so that the pressing part 431 is tilted upward and returned to its original position.

[0080] Furthermore, the counting assembly 4 further includes a sensor, which is a laser sensor, for detecting the position change of the sliding block 42, and counting once if the paddle 521 is folded. The position change count detected by the laser sensor is compared with the counter 44 to determine the number of times the paddle 521 is folded.

[0081] The method of using this embodiment is as follows:

[0082] When in use, the tested piece 5 is mounted to the fixed structure 1 , the end of the swinging piece 33 is connected to the spring pin 513 , the paddle 521 is initially in an unfolded state, and the paddle 521 is located on the supporting portion 342 of the supporting piece 34 .

[0083] The servo 21 drives the driving component 22 to rotate clockwise. When the first protrusion 221 and the second protrusion 222 rotate to the bottom of the first connecting member 31, the first protrusion 311 of the first connecting member 31 abuts against the first protrusion 221, and the end of the first connecting member 31 connected to the second connecting member 32 rotates to the side away from the swing member 33, driving the second connecting member 32 and the swing member 33, and the swing member 33 drives the spring pin 513 to move to the same side. The spring pin 513 drives the end of the pressure rod 514 connected thereto to disengage from the second U-shaped groove of the rotating block 522, and the unfolded state of the blade 521 is unlocked, and the rotating block 522 can drive the blade 521 to rotate.

[0084] The driving member 22 continues to rotate, and the second protrusion 222 rotates to the side of one side of the support member 34. The rotating portion 341 of the support member 34 contacts the second protrusion 222, and under the action of friction, the rotating portion 341 rotates downward along with the second protrusion 222. Under the action of the lever, the support portion 342 swings upward, driving the paddle 521 to move upward to the folded state, at which time, the second U-shaped groove of the rotating block 522 opens downward.

[0085] The driving member 22 rotates until the first protrusion 221 contacts the second protrusion 433, and the second protrusion 433 moves downward along with the outer periphery of the first protrusion 221, and the pressing portion 431 presses down the pressing rod 514 of the counter 44, the counter 44 counts, and the laser sensor 45 counts. At the same time, the return portion 432 tilts upward, pushing the sliding block 42 up to the upper part of the sliding block 42 into the second U-shaped groove, and the paddle 521 is locked in the folded state, as shown in FIG. Fig.10 shown.

[0086] The driving component 22 continues to rotate, and the first protrusion 221 is disengaged from the second protrusion 433. The first protrusion 221 moves upward along the outer periphery of the driving component 22, and the return portion 432 moves downward. The sliding block 42 is disengaged from the third protrusion 434, the folded state of the paddle 521 is unlocked, and the rotating block 522 can rotate freely. Under the action of gravity, the sliding block 42 slides downward and presses down the third protrusion 434, and the pressing portion 431 is disengaged from the counter 44 and returns to its original position.

[0087] After the rotating portion 341 of the support member 34 is separated from the second protruding portion 222, it returns to the initial state under the action of the second return spring 512. The blade 521 then rotates downward and slowly unfolds, forming a 180° angle with the hub 511.

[0088] The first protrusion 311 of the first connecting member 31 is separated from the first protruding portion 221, and the end of the first connecting member 31 connected to the second connecting member 32 rotates toward the side close to the swinging member 33, driving the second connecting member 32 and the swinging member 33, and the swinging member 33 drives the spring pin 513 to move toward the same side. The spring pin 513 drives the end of the pressure rod 514 connected thereto away from the spring 512 to enter the second U-shaped groove of the rotating block 522, locking the blade 521 in the expanded state, as shown in FIG. Fig.11 shown.

[0089] This embodiment is provided with a driving component 2, a folding component 3 and a counting component 4. The first protrusion 221 and the second protrusion 222 provided on the outer periphery of the driving component 22 in the driving component 2 are connected with the folding component 3 and the counting component 4 to realize the state and counting of the blade 521 and realize the precise driving of the folding and unfolding action of the blade 521; the first protrusion 221 is connected with the connecting member to drive the connecting member and the swing member 33 to move and unlock the locking state of the tested member 5; the second protrusion 222 drives the rotating part 341 of the supporting member 34 to realize the folding and unfolding of the blade 521 by the supporting member 34; the first protrusion 221 contacts the second protrusion 433 of the swinging rod 43 so that the pressing part 431 moves downward to press the pressing rod 514 of the counter 44 to realize counting. The operation is simple, the reliability is high, the test efficiency is high, and the cost of the test equipment is reduced, and the reliability test of the folding of the blade 521 is realized stably and accurately.

[0090] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A reliability testing device for a folding blade, characterized in that: It comprises a fixing structure (1), a driving component (2), a folding component (3) and a counting component (4); The driving component (2) is arranged on the fixed structure (1) and is used to drive the folding component (3) and the counting component (4); The folding component (3) and the counting component (4) are respectively arranged on the fixed structure (1); the folding component (3) is used to fold or unfold the paddle (521) of the tested object (5), and the counting component (4) is used to count the number of folding times of the paddle (521).

2. The reliability testing device for folding blades according to claim 1, characterized in that: The driving assembly (2) comprises a steering gear (21) and a driving component (22); the driving component (22) is arranged at the output end of the steering gear (21); The driving component (22) comprises a driving component body, a first protrusion (221) and a second protrusion (222); the driving component body is a disc structure, and the steering gear (21) drives the driving component body to rotate around a rotation center located thereon; the first protrusion (221) is formed by extending a portion of the edge of the driving component body in a radial direction; and the second protrusion (222) is an arc-shaped ring arranged on the edge of the surface of the driving component body.

3. The reliability testing device for folding blades according to claim 2, characterized in that: The central angles corresponding to the first protrusion (221) and the second protrusion (222) on the disc-shaped driving component body have overlapping parts and non-overlapping parts.

4. The reliability testing device for folding blades according to claim 2, characterized in that: The folding assembly (3) comprises a connecting assembly and a swinging member (33); One end of the connecting component is in contact with the outer periphery of the driving component (22); the other end of the connecting component is connected to the swinging member (33); One end of the swinging member (33) is hinged to the fixed structure (1), and the other end of the swinging member (33) is connected to the tested member (5) for unlocking or locking the unfolded state of the blade (521).

5. The reliability testing device for folding blades according to claim 4, characterized in that: The connection assembly comprises a first connection member (31) and a second connection member (32); The first connecting member (31) is an L-shaped rod, and the first connecting member (31) is arranged on one side of the measured object (5) and is hinged to the fixed structure (1) in the middle; The second connecting member (32) is a pull rod structure, and the second connecting member (32) is arranged between the first connecting member (31) and the swing member (33).

6. The reliability testing device for folding blades according to claim 4, characterized in that: The folding assembly (3) further comprises a support member (34); the support member (34) comprises a rotating portion (341) and a supporting portion (342); the rotating portion (341) is capable of contacting the second protruding portion (222) and rotating downwards under the drive of the second protruding portion (222); When the rotating portion (341) rotates downward, the supporting portion (342) tilts upward, supporting the paddle (521) to rotate upward to a folded state.

7. The reliability testing device for folding blades according to claim 6, characterized in that: An extended line of the rotating portion (341) and the supporting portion (342) is arranged to have an included angle smaller than 90°.

8. The reliability testing device for folding blades according to claim 7, characterized in that: The support portion (342) comprises a side edge (3421) and a support rod (3422); the side edge (3421) is provided with a plurality of limiting holes for installing the support rod (3422).

9. The reliability testing device for folding blades according to claim 1, characterized in that: The counting assembly (4) comprises a swinging rod (43) and a counter (44); One end of the swing lever (43) is a pressing portion (431) for pressing the counter (44) to count the number of folding times of the paddle (521); the other end is a return portion (432) for returning the pressing portion (431) to an initial position after counting.

10. The reliability testing device for folding blades according to claim 9, characterized in that: The swing rod (43) has a circular arc section, a radial extension section and a tangential extension section; The arc segment is a 1 / 4 arc; the radial extension segment is formed by extending one end of the arc segment radially outward; the pressing portion (431) is arranged on the radial extension segment; the tangential extension segment is formed by extending the other end of the arc segment along the tangential direction of the arc segment; the return portion (432) is arranged at the end of the tangential extension segment; The hinge of the swing lever (43) is located in the tangential extension section.

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