Support device for eVTOL ground vibration testing

Abstract

A kind of support device for eVTOL ground vibration test belongs to the field of aviation equipment.The support device includes support assembly, including support frame and support platform, the lower end of support frame is used to contact with ground, the upper end of support frame is connected with support platform;And lifting device, including lifting mechanism and lifting platform, lifting mechanism is arranged on support platform, lifting mechanism has input and output, input is used to connect with external power source, output is vertically arranged and is connected with lifting platform, lifting mechanism is used to adjust the height of lifting platform, lifting platform is used to install the vibration source device required when eVTOL ground vibration test.Compared with prior art, the utility model is based on the design concept that lifting mechanism is additionally arranged on support frame, conveniently adjusts the installation height of vibration source device in time and reliably according to test requirement, and then matches the requirement of eVTOL ground vibration test.

Description

Technical Field

[0001] This utility model belongs to the field of aviation equipment, and in particular relates to a support device for eVTOL ground vibration testing. Background Technology

[0002] In the development of eVTOL (Electric Vertical Take-off and Landing), in order to obtain experimental vibration data of the entire aircraft structure in order to verify and improve its structural dynamics model, GVT (Ground Vibration Test) is a key part of the large-scale ground test that must be completed before the aircraft's first flight. It is also a reliable means and important basis for verifying and examining the aircraft's dynamic characteristics and improving the flutter analysis model.

[0003] It is worth mentioning that during the GVT process of eVTOL, devices capable of generating specific forms of vibration (such as vibrators) are usually used to test the structural strength, vibration reduction system, and other performance of the aircraft. Therefore, before GVT, it is crucial to determine the installation position of vibrators and similar devices (such as the installation height and levelness of the vibrators) reasonably according to the size and characteristics of the eVTOL.

[0004] In related technologies, although some support devices can support the vibrator, they have problems such as weak compatibility, poor stability, and inconvenience in movement, and they cannot adjust the installation height of the vibrator in a timely manner according to the needs. Utility Model Content

[0005] In view of this, the purpose of this utility model is to provide a support device for eVTOL ground vibration testing, so as to solve at least one of the above technical problems.

[0006] To achieve the above technical objectives, this utility model provides a support device for eVTOL ground vibration testing, the support device comprising: A support assembly includes a support frame and a support platform, wherein the lower end of the support frame is for contacting the ground, and the upper end of the support frame is connected to the support platform; and A lifting device includes a lifting mechanism and a lifting platform. The lifting mechanism is mounted on the support platform and has an input end and an output end. The input end is used to connect to an external power source, and the output end is arranged vertically and connected to the lifting platform. The lifting mechanism is used to adjust the height of the lifting platform, and the lifting platform is used to install the vibration source device required for eVTOL ground vibration testing.

[0007] In one embodiment, the support frame includes three or more base beams and three or more support rods. The three or more base beams are connected end to end to form the base of the support frame. The three or more support rods are disposed between the three or more base beams and a support platform. The lower end of each support rod is connected to the connection point of each two adjacent base beams, and the upper end of each support rod is connected to the bottom surface of the support platform.

[0008] In one embodiment, the support frame further includes three or more reinforcing rods, with one reinforcing rod connected at the middle of each pair of adjacent support rods.

[0009] In one embodiment, the support frame further includes three or more gripping rods, each gripping rod corresponding to a reinforcing rod, and one end of each gripping rod is connected to the middle of the corresponding reinforcing rod.

[0010] In one embodiment, the support assembly further includes a moving mechanism, which includes multiple roller modules. The multiple roller modules are disposed on three or more base beams and are distributed in a polygonal pattern. Each roller module includes a roller seat, a roller shaft, and a roller. The roller seat is fixedly connected to the base beam and rotatably connected to the roller through the roller shaft. The roller is used to contact the ground.

[0011] In one embodiment, the support assembly further includes a fixing mechanism comprising multiple screw modules arranged in a chain around three or more base beams. Each screw module includes a connecting block, a connecting arm, a screw, a screw drive rod, and a screw base. The connecting block is fixedly connected to the base beam. One end of the connecting arm is hinged to the connecting block and is rotatable in a vertical plane around one end of the connecting arm. The other end of the connecting arm is threadedly connected to the screw. The screw drive rod is connected to the upper end of the screw, and the screw base is connected to the lower end of the screw. The screw base is used to contact the ground.

[0012] In one embodiment, the connecting block includes a first connecting block and a second connecting block. The first connecting block is located in the middle of the base beam, and the second connecting block is located at one end of the base beam. One end of the connecting arm is hinged to the first connecting block and the second connecting block respectively via a pin.

[0013] In one embodiment, the lifting mechanism includes a housing, a worm gear, a worm wheel, and a lead screw. The housing is disposed on the support platform. One end of the worm gear is located inside the housing, and the other end of the worm gear is located outside the housing and is used to connect to an external power source. The worm wheel is disposed inside the housing and meshes with one end of the worm gear and the lead screw. The lead screw is vertically arranged and passes through the housing, the worm wheel, and the support platform. The upper end of the lead screw is connected to the lifting platform.

[0014] In one embodiment, the lifting device further includes a guide assembly, which includes a guide rod mounting plate, a guide rod sleeve, and a guide rod. The guide rod mounting plate is disposed between and connected to the support platform and the mechanism housing. The guide rod is sleeved on the guide rod mounting plate. The guide rod is vertically arranged and passes through the guide rod sleeve, the guide rod mounting plate, and the support platform. The upper end of the guide rod is connected to the lifting platform.

[0015] In one embodiment, the lifting platform is provided with a plurality of vibration source device mounting holes, which are used to cooperate with the vibration source device to realize the installation of the vibration source device on the lifting platform.

[0016] By adopting the above technical solution, this utility model has the following beneficial effects: This utility model discloses a support device for eVTOL ground vibration testing. The support device includes a support assembly and a lifting device. The support assembly includes a support frame and a support platform. The lower end of the support frame is in contact with the ground, and the upper end of the support frame is connected to the support platform. The lifting device includes a lifting mechanism and a lifting platform. The lifting mechanism is mounted on the support platform and has an input end and an output end. The input end is connected to an external power source, and the output end is vertically positioned and connected to the lifting platform. The lifting mechanism is used to adjust the height of the lifting platform, and the lifting platform is used to mount the vibration source device required for eVTOL ground vibration testing. Thus, when the vibration source device is mounted on the support assembly via the lifting device, the input end of the lifting mechanism can operate under the drive of an external force, transmitting the driving force generated by the external force to the output end of the lifting mechanism. This causes the output end of the lifting mechanism and the lifting platform to move vertically, thereby adjusting the height of the vibration source device on the lifting platform relative to the ground. Compared to existing technologies, this utility model is based on the design concept of adding a lifting mechanism to the support frame, which makes it convenient to adjust the installation height of the vibration source device in a timely and reliable manner according to the test requirements, thereby matching the requirements of eVTOL ground vibration testing. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a structural schematic diagram of a support device for eVTOL ground vibration testing provided in an embodiment of this application, in its usage state.

[0019] Figure 2 This is a schematic diagram of the support assembly of a support device for eVTOL ground vibration testing provided in an embodiment of this application.

[0020] Figure 3 This is a structural schematic diagram of a lifting device for a support device used in eVTOL ground vibration testing, provided in an embodiment of this application.

[0021] Explanation of reference numerals in the attached figures: 100. Support device; 10. Support components; 11. Support frame; 12. Support platform; 13. Moving mechanism; 14. Fixing mechanism; 111. Base beam; 112. Support rod; 113. Reinforcing rod; 114. Holding rod; 121. Lead screw through hole; 122. Guide rod through hole; 131. Roller base; 132. Roller shaft; 133. Roller; 141. Connecting block; 141a. First connecting block; 141b. Second connecting block; 142. Connecting arm; 143. Screw; 144. Screw drive rod; 145. Screw base; 20. Lifting device; 21. Lifting mechanism; 22. Lifting platform; 23. Guide assembly; 211. Mechanism housing; 212. Worm gear; 213. Lead screw; 221. Vibration source device mounting hole; 231. Guide rod mounting plate; 232. Guide rod sleeve; 233. Guide rod. Detailed Implementation

[0022] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely some, not all, of the embodiments of this utility model. Based on the description of this utility model, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this utility model.

[0023] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0024] The terms “upper,” “lower,” “left,” “right,” “front,” “back,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of description and simplification, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] The terms “first,” “second,” “third,” etc., are used merely to distinguish elements with similar properties, not to indicate or imply relative importance or a specific order.

[0026] The terms “include,” “comprising,” or any other variation thereof are intended to cover non-exclusive inclusion, which includes not only the elements listed but also other elements not expressly listed.

[0027] According to the inventors, in the development of eVTOL (Electric Vertical Take-off and Landing), in order to obtain experimental vibration data of the entire aircraft structure in order to verify and improve its structural dynamics model, GVT (Ground Vibration Test) is a key part of the large-scale ground test that must be completed before the aircraft's first flight. It is also a reliable means and important basis for verifying and examining the aircraft's dynamic characteristics and improving the flutter analysis model.

[0028] It is worth mentioning that during the GVT process of eVTOL, devices capable of generating specific forms of vibration (such as vibrators) are usually used to test the structural strength, vibration reduction system, and other performance of the aircraft. Therefore, before GVT, it is crucial to determine the installation position of vibrators and similar devices (such as the installation height and levelness of the vibrators) reasonably according to the size and characteristics of the eVTOL.

[0029] In related technologies, although some support devices can support the vibrator, they have problems such as weak compatibility, poor stability, and inconvenience in movement, and they cannot adjust the installation height of the vibrator in a timely manner according to the needs.

[0030] To address at least one of the above technical problems, it is necessary to improve or optimize the existing support structure to better enable ground vibration testing of eVTOL.

[0031] Example Please see Figures 1 to 3 This utility model provides a support device for eVTOL ground vibration testing. The support device 100 includes a support assembly 10 and a lifting device 20. The support assembly 10 includes a support frame 11 and a support platform 12. The lower end of the support frame 11 is for contacting the ground, and the upper end of the support frame 11 is connected to the support platform 12. The lifting device 20 includes a lifting mechanism 21 and a lifting platform 22. The lifting mechanism 21 is mounted on the support platform 12 and has an input end and an output end. The input end is for connecting to an external power source (such as a motor), and the output end is vertically arranged and connected to the lifting platform 22. It should be noted that the lifting mechanism 21 is used to adjust the height of the lifting platform 22, and the lifting platform 22 is used to install the vibration source device (such as a vibrator) required for eVTOL ground vibration testing.

[0032] For example, such as Figure 2 As shown, the support frame 11 has a tripod structure overall, but it is not limited to this; it can also have a quadruped or pentagonal structure. Specifically, the support frame 11 includes three or more base beams 111 and three or more support rods 112. The three or more base beams 111 are connected end to end to form the base of the support frame 11. The three or more support rods 112 are located between the three or more base beams 111 and a support platform 12. The lower end of each support rod 112 is connected to the connection point of each adjacent pair of base beams 111, and the upper end of each support rod 112 is connected to the bottom surface of the support platform 12. Preferably, the lengths of each base beam 111 and each support rod 112 are equal. This ensures the levelness of the support platform 12, and consequently, the levelness of the vibration source device.

[0033] Furthermore, to prevent the support frame 11 from crushing under load, in this embodiment, the support frame 11 also includes three or more reinforcing rods 113. Specifically, a reinforcing rod 113 is connected to the middle of every two adjacent support rods 112. This can improve the structural strength of the support frame 11, ensuring that it is not prone to shape changes within a certain load range, thereby providing stable and reliable support.

[0034] Furthermore, to facilitate the gripping of the support device 100 by the operator, in this embodiment, the support frame 11 also includes three or more gripping rods 114. Specifically, each gripping rod 114 corresponds one-to-one with a reinforcing rod 113, and one end of each gripping rod 114 is connected to the middle of the corresponding reinforcing rod 113. Preferably, the three or more gripping rods 114 and the three or more reinforcing rods 113 are coplanar. This facilitates the operator in moving or transporting the support device 100 by applying force to the gripping rods 114.

[0035] For example, to make the support device 100 easy to move, in this embodiment, the support assembly 10 further includes a moving mechanism 13. Specifically, the moving mechanism 13 includes multiple roller modules, which are arranged in a polygonal pattern on three or more base beams 111. Each roller module includes a roller seat 131, a roller shaft 132, and a roller 133. The roller seat 131 is fixedly connected to the base beam 111 and rotatably connected to the roller 133 via the roller shaft 132. The roller 133 is used to contact the ground. This facilitates the movement of the support device 100 to a storage area or equipment room by workers.

[0036] Furthermore, to ensure the support device 100 has high stability, the support assembly 10 also includes a fixing mechanism 14. Specifically, the fixing mechanism 14 includes multiple screw modules, which are arranged in a chain around three or more base beams 111. Each screw module includes a connecting block 141, a connecting arm 142, a screw 143, a screw drive rod 144, and a screw base 145. The connecting block 141 is fixedly connected to the base beam 111. One end of the connecting arm 142 is hinged to the connecting block 141, and the connecting arm 142 can rotate in a vertical plane around one end of the connecting arm 142. The other end of the connecting arm 142 is threadedly connected to the screw 143. The screw drive rod 144 is connected to the upper end of the screw 143, and the screw base 145 is connected to the lower end of the screw 143. The screw base 145 is used to contact the ground. Thus, when the support device 100 needs to be fixed, it can be reliably fixed on the ground in the test area or experimental area by making both the moving mechanism 13 and the fixing mechanism 14 contact the ground, or by making the fixing mechanism 14 contact the ground and separating the moving mechanism 13 from the ground; when the support device 100 needs to be moved, it can be moved on the ground by retracting the fixing mechanism 14 and making the moving mechanism 13 contact the ground.

[0037] It is worth mentioning that the contact or separation of the fixing mechanism 14 from the ground is achieved by the vertical movement of the screw base 145 on the screw 143. Specifically, when it is necessary to make the fixing mechanism 14 contact the ground, the operator can drive the screw drive rod 144 at the upper end of the screw 143 to rotate clockwise, thereby causing the screw 143 to rotate clockwise and descend towards the ground, thus making the screw base 145 at the lower end of the screw 143 contact the ground; when it is necessary to separate the fixing mechanism 14 from the ground, the operator can drive the screw drive rod 144 at the upper end of the screw 143 to rotate counterclockwise, thereby causing the screw 143 to rotate counterclockwise and rise away from the ground, thus separating the screw base 145 at the lower end of the screw 143 from the ground.

[0038] Furthermore, to ensure the connection stability between the fixing mechanism 14 and the support frame 11, the connecting block 141 includes a first connecting block 141a and a second connecting block 141b. Specifically, the first connecting block 141a is located in the middle of the base beam 111, and the second connecting block 141b is located at one end of the base beam 111. One end of the connecting arm 142 is hinged to both the first connecting block 141a and the second connecting block 141b via pins. Thus, by providing two connection points between one end of the connecting arm 142 and the base beam 111, the problem of connection failure is effectively prevented.

[0039] For example, such as Figure 3 As shown, the lifting mechanism 21 includes a mechanism housing 211, a worm gear 212, a worm wheel (not shown in the figure), and a lead screw 213. The mechanism housing 211 is mounted on the support platform 12. One end of the worm gear 212 is located inside the mechanism housing 211, and the other end of the worm gear 212 is located outside the mechanism housing 211 and is used to connect to an external power source. The worm wheel is located inside the mechanism housing 211 and meshes with one end of the worm gear 212 and the lead screw 213. The lead screw 213 is arranged vertically and passes through the mechanism housing 211, the worm wheel, and the support platform 12. The upper end of the lead screw 213 is connected to the lifting platform 22. Thus, when the vibration source device is mounted on the support assembly 10 via the lifting device 20, the worm 212 can rotate under the drive of an external power source and transmit the driving force generated by the external force to the worm wheel, causing the worm wheel to rotate and drive the lead screw 213 to move axially. At this time, the lifting platform 22 connected to the upper end of the lead screw 213 moves vertically to adjust the height of the vibration source device on the lifting platform 22 relative to the ground, thereby matching the requirements of eVTOL ground vibration testing.

[0040] Furthermore, to ensure the stability of the support device 100 when adjusting the height of the vibration source device, the lifting device 20 also includes a guide assembly 23. Specifically, the guide assembly 23 includes a guide rod mounting plate 231, a guide rod sleeve 232, and a guide rod 233. The guide rod mounting plate 231 is located between and connected to the support platform 12 and the mechanism housing 211. The guide rod sleeve 232 is located on the guide rod mounting plate 231. The guide rod 233 is vertically arranged and passes through the guide rod sleeve 232, the guide rod mounting plate 231, and the support platform 12. The upper end of the guide rod 233 is connected to the lifting platform 22. Preferably, the upper end of the guide rod 233 is flush with the upper end of the lead screw 213. On the one hand, this helps to ensure the smoothness of the vibration source device when it rises or falls under the transmission action of the lifting device 20. On the other hand, it also ensures the levelness of the vibration source device.

[0041] Furthermore, to ensure the installation of the lead screw 213 and guide rod 233 on the support platform 12, the support platform 12 is provided with a lead screw through hole 121 and a guide rod through hole 122, wherein the lead screw through hole 121 is used to pass through the lead screw 213, and the guide rod through hole 122 is used to pass through the guide rod 233. This helps to ensure that the assembly of the support device 100 can be carried out.

[0042] Furthermore, to facilitate the installation of the vibration source device, the lifting platform 22 has multiple vibration source device mounting holes 221. These holes 221 are used to cooperate with the vibration source device to install it on the lifting platform 22. It is worth noting that, due to the differences in the external dimensions of the vibration source devices (e.g., varying sizes), and to accommodate vibration source devices of different sizes, the innermost mounting holes 221 are used to install small vibration source devices, while the outermost mounting holes 221 are used to install large vibration source devices. It should be noted that the terms "inner" and "outer" refer to their relative to the geometric center of the lifting platform 22; that is, the area closer to the geometric center of the lifting platform 22 is considered the inner side, and the area farther from the geometric center is considered the outer side.

[0043] In summary, compared with the prior art, firstly, the present invention is based on the design concept of adding a lifting mechanism 21 to the support frame 11, which facilitates timely and reliable adjustment of the installation height of the vibration source device according to the test requirements, thereby matching the requirements of eVTOL ground vibration test; secondly, by adding a moving mechanism 13 and a fixing mechanism 14 to the support frame 11, the combined use of the two is beneficial to make the support device 100 have the characteristics of strong stability and convenient movement.

[0044] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.

Claims

1. A support device for eVTOL ground vibration testing, characterized in that, The support device includes: A support assembly includes a support frame and a support platform, wherein the lower end of the support frame is for contacting the ground, and the upper end of the support frame is connected to the support platform; and A lifting device includes a lifting mechanism and a lifting platform. The lifting mechanism is mounted on the support platform and has an input end and an output end. The input end is used to connect to an external power source, and the output end is arranged vertically and connected to the lifting platform. The lifting mechanism is used to adjust the height of the lifting platform, and the lifting platform is used to install the vibration source device required for eVTOL ground vibration testing.

2. The support device for eVTOL ground vibration testing as described in claim 1, characterized in that, The support frame includes three or more base beams and three or more support rods. The three or more base beams are connected end to end to form the base of the support frame. The three or more support rods are located between the three or more base beams and a support platform. The lower end of each support rod is connected to the connection point of each two adjacent base beams, and the upper end of each support rod is connected to the bottom surface of the support platform.

3. The support device for eVTOL ground vibration testing as described in claim 2, characterized in that, The support frame also includes three or more reinforcing rods, with one reinforcing rod connected to the middle of each pair of adjacent support rods.

4. The support device for eVTOL ground vibration testing as described in claim 3, characterized in that, The support frame also includes three or more gripping rods, each gripping rod corresponding to a reinforcing rod, and one end of each gripping rod is connected to the middle of the corresponding reinforcing rod.

5. The support device for eVTOL ground vibration testing as described in claim 2, characterized in that, The support assembly also includes a moving mechanism, which includes multiple roller modules. The multiple roller modules are arranged in a polygonal pattern on three or more base beams. Each roller module includes a roller seat, a roller shaft, and a roller. The roller seat is fixedly connected to the base beam and rotatably connected to the roller through the roller shaft. The roller is used to contact the ground.

6. The support device for eVTOL ground vibration testing as described in claim 2, characterized in that, The support assembly further includes a fixing mechanism, which comprises multiple screw modules arranged in a chain around three or more base beams. Each screw module includes a connecting block, a connecting arm, a screw, a screw drive rod, and a screw base. The connecting block is fixedly connected to the base beam. One end of the connecting arm is hinged to the connecting block and can rotate about one end in a vertical plane. The other end of the connecting arm is threadedly connected to the screw. The screw drive rod is connected to the upper end of the screw, and the screw base is connected to the lower end of the screw. The screw base is used to contact the ground.

7. The support device for eVTOL ground vibration testing as described in claim 6, characterized in that, The connecting block includes a first connecting block and a second connecting block. The first connecting block is located in the middle of the base beam, and the second connecting block is located at one end of the base beam. One end of the connecting arm is hinged to the first connecting block and the second connecting block respectively through a pin.

8. The support device for eVTOL ground vibration testing as described in claim 1, characterized in that, The lifting mechanism includes a housing, a worm gear, a worm wheel, and a lead screw. The housing is located on the support platform. One end of the worm gear is located inside the housing, and the other end is located outside the housing and is used to connect to an external power source. The worm wheel is located inside the housing and meshes with one end of the worm gear and the lead screw. The lead screw is vertically arranged and passes through the housing, the worm wheel, and the support platform. The upper end of the lead screw is connected to the lifting platform.

9. The support device for eVTOL ground vibration testing as described in claim 8, characterized in that, The lifting device further includes a guide assembly, which includes a guide rod mounting plate, a guide rod sleeve, and a guide rod. The guide rod mounting plate is located between and connected to the support platform and the mechanism housing. The guide rod is sleeved on the guide rod mounting plate. The guide rod is vertically arranged and passes through the guide rod sleeve, the guide rod mounting plate, and the support platform. The upper end of the guide rod is connected to the lifting platform.

10. The support device for eVTOL ground vibration testing as described in claim 1, characterized in that, The lifting platform is provided with multiple vibration source device mounting holes, which are used to cooperate with the vibration source device to install the vibration source device on the lifting platform.

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