Worm self-locking type traceless rain erosion test piece locking mechanism

Abstract

The invention discloses a worm self-locking type traceless rain erosion test piece locking mechanism which comprises a loading table, a test piece, a supporting block, a locking piece, a driving piece and a transmission piece, a mounting notch is formed in a to-be-tested part of the loading table, the test piece is mounted on the surface of the supporting block, the locking piece and the transmission piece are arranged in the mounting notch, and the driving piece is arranged on the supporting block. The driving piece is mounted in the loading table and is in transmission connection with the locking piece through the transmission piece, during locking, the supporting block is inserted into the mounting notch, the driving piece is rotated to drive the transmission piece to rotate so as to drive the locking piece to move to lock and fix the supporting block, and a test piece on the surface of the supporting block is flush with each surface of the loading table so as to form a surface traceless structure; in the unlocking process, the driving piece is rotated to drive the transmission piece to rotate so as to drive the locking piece to reset, and therefore the locking fixing force on the supporting block can be relieved. The device has the advantages of simple and convenient installation and disassembly and stable and accurate test.

Description

Technical Field

[0001] The invention relates to the technical field of high-speed rotating table equipment simulated rain erosion experimental testing, and in particular to a worm self-locking type traceless rain erosion specimen locking mechanism. Background Art

[0002] Rain erosion refers to the process in which raindrops repeatedly impact the surface of a material, gradually destroying it. This phenomenon occurs when large-scale high-speed equipment is running in a rainy environment, such as the leading edge of wind turbine blades, tunnel ventilation fan blades, aircraft engine fan blades, aircraft skins, radar covers, etc. The damage caused by rain erosion often causes material damage, reduces component performance and structural strength, and affects equipment operation efficiency and safety.

[0003] Materials need to be tested for rain erosion to evaluate their anti-rain erosion performance and assess the damage during operation. At present, high-speed rotating table equipment is mostly used to simulate rain erosion test. During the test, the protective material test sample needs to be locked and fixed on the rotating table test blade. However, the current locking devices are all fastened with bolts. When in use, installation and disassembly are troublesome, time-consuming and labor-intensive, and the operation is very inconvenient. The huge centrifugal force of the rotating structure is easy to induce failure risks, and there are gaps or defects on the blade surface after installation, which affects the aerodynamic performance of the blade during high-speed rotation, affecting the blade rotation stability and test results. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a worm self-locking traceless rain erosion specimen locking mechanism which is simple and convenient to install and disassemble and has a firm and reliable installation.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] Compared with the prior art, the advantages of the present invention are:

[0007] A worm self-locking traceless rain erosion specimen locking mechanism comprises a loading platform, a test specimen, a support block, a locking member, a driving member and a transmission member, wherein the loading platform is provided with a mounting notch on a portion to be tested, the test specimen is mounted on a surface of the support block, the locking member and the transmission member are arranged in the mounting notch, the driving member is mounted in the loading platform and is transmission-connected to the locking member through a transmission member, when locking, the support block is inserted into the mounting notch, and the transmission member is driven to rotate by a rotating driving member to drive the locking member to move and lock the support block, the test specimen on the surface of the support block is flush with various surfaces of the loading platform to form a surface traceless structure; when unlocking, the transmission member is driven to rotate by a rotating driving member to drive the locking member to reset and release the locking fixing force on the support block.

[0008] As a further improvement of the above technical solution:

[0009] The loading platform is provided with an installation groove which is communicated with the installation notch, the locking member and the transmission member are installed together in the installation groove, and the front and rear end walls of the support block are provided with locking grooves. When locking, the driving member drives the transmission member to rotate to drive the locking member to move into the locking groove to lock and fix the support block; when unlocking, the driving member drives the transmission member to rotate to drive the locking member to return to the installation groove to release the locking force on the support block.

[0010] The locking member includes a front locking block and a rear locking block, which are slidably mounted in the mounting groove, and the front locking block and the rear locking block are provided with racks connected to the transmission member. When locking, the front locking block is driven by the driving member to slide into the locking groove on the front end wall of the supporting block, and the rear locking block is driven by the driving member to slide into the locking groove on the rear end wall of the supporting block to lock and fix the supporting block; when unlocking, the driving member drives the transmission member to rotate to simultaneously drive the front locking block and the rear locking block to slide into the mounting groove to release the locking and fixing force of the supporting block.

[0011] The driving member includes a worm and a crank. The worm is movably installed in the loading platform through a bearing. One end of the worm is located in a mounting groove and is provided with a spiral tooth connected to the transmission member, and the other end extends to the end surface of the loading platform and is provided with a slot for connecting with the crank.

[0012] A torsion spring is arranged in the installation groove, and the torsion spring is connected to the end of the worm.

[0013] The transmission member includes a turbine shaft and a gear mounted on the turbine shaft. The turbine shaft is movably mounted in the mounting groove through a bearing. The turbine on the turbine shaft is meshed and connected with the helical teeth. The gear is also meshed and connected with the racks on the front locking block and the rear locking block.

[0014] The support block comprises a support platform and an insertion platform arranged at the bottom of the support platform, the test specimen is wrapped and fixed on the surface of the support platform, and the locking groove is arranged on the end wall of the insertion platform.

[0015] Positioning notches are arranged at both ends of the insertion platform, and positioning steps cooperating with the positioning notches for positioning are also arranged in the installation notch.

[0016] The bottom of the test specimen is bent with an edge, and the edge is fastened to the bottom of the support platform by bolts.

[0017] The bottom of the test specimen is bent to form an edge, a slot is provided between the bottom of the support platform and the insertion platform, and the edge is inserted into the slot.

[0018] Compared with the prior art, the advantages of the present invention are:

[0019] The worm self-locking traceless rain erosion specimen locking mechanism of the present invention, when conducting a rain erosion test, firstly installs the test specimen on the surface of the support block, then inserts the support block into the installation notch on the loading platform, and drives the transmission member to rotate by rotating the driving member, thereby driving the locking member to move and lock the support block to achieve stable installation of the test specimen, and when unlocking, drives the transmission member to reset by rotating the driving member in the opposite direction, thereby releasing the locking force, and its installation and disassembly operations are simple and convenient, saving time and effort, and the test specimen can be flush with the surfaces of the loading platform to form a traceless structure, eliminating the gap after the test specimen is installed, and ensuring stable test and accurate test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of Example 1 of the present invention.

[0021] Figure 2 yes Figure 1 sectional view of .

[0022] Figure 3 It is a schematic diagram of the loading platform structure of the present invention.

[0023] Figure 4 yes Figure 3 sectional view of .

[0024] Figure 5 It is a partial structural schematic diagram of the present invention.

[0025] Figure 6 It is a schematic diagram of the connection between the driving member, the transmission member and the locking member of the present invention.

[0026] Figure 7 It is a schematic diagram of the driving rod structure of the present invention.

[0027] Figure 8 It is a structural schematic diagram (stereoscopic diagram) of the support block of the present invention.

[0028] Fig. 9 It is a schematic diagram of the support block structure of Example 1 of the present invention (front view).

[0029] Fig.10 It is a schematic diagram of the support block structure of Example 2 of the present invention (front view).

[0030] Fig.11 It is a schematic diagram of the support block structure of Example 3 of the present invention (front view).

[0031] The symbols in the figure represent:

[0032] 1. Loading platform; 11. Installation notch; 111. Positioning step; 12. Installation slot; 2. Test specimen; 21. Edge wrapping; 3. Support block; 31. Locking slot; 32. Support platform; 33. Insertion platform; 331. Positioning notch; 34. Slot; 4. Locking member; 41. Front locking block; 42. Rear locking block; 5. Driving member; 51. Worm; 511. Helical teeth; 512. Slot; 52. Crank; 6. Transmission member; 61. Turbine shaft; 62. Gear; 7. Torsion spring; 8. Bolt. DETAILED DESCRIPTION

[0033] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] like Figures 1 to 9 As shown, a first embodiment of the worm self-locking traceless rain erosion specimen locking mechanism of the present invention comprises a loading platform 1, a test specimen 2, a support block 3, a locking member 4, a driving member 5 and a transmission member 6. The loading platform 1 is provided with a mounting notch 11 at the part to be tested, the test specimen 2 is mounted on the surface of the support block 3, the locking member 4 and the transmission member 6 are arranged in the mounting notch 11, the driving member 5 is mounted in the loading platform 1 and is connected to the locking member 4 through the transmission member 6. When locking, the support block 3 is inserted into the mounting notch 11, and the transmission member 6 is driven to rotate by the rotating driving member 5 to drive the locking member 4 to move and lock the support block 3 to form a locked fixation. The test specimen 2 on the surface of the support block 3 is flush with the surfaces of the loading platform 1 to form a surface traceless structure; when unlocking, the transmission member 6 is driven to rotate by the rotating driving member 5 to drive the locking member 4 to reset to release the locking fixing force on the support block 3. When conducting a rain erosion test, the test specimen 2 is first mounted on the surface of the support block 3, and then the support block 3 is inserted into the mounting notch 11 on the loading platform 1, and the transmission member 6 is driven to rotate by rotating the driving member 5, thereby driving the locking member 4 to move and lock the support block 3, so that the test specimen 2 is firmly installed. When unlocking, the transmission member 6 is driven to reset by rotating the driving member 5 in the opposite direction, thereby releasing the locking force. The installation and disassembly operations are simple and convenient, saving time and effort, and the test specimen 2 can be flush with the surfaces of the loading platform 1 to form a seamless structure, eliminating the gap after the test specimen 2 is installed, and ensuring stable testing and accurate test results.

[0035] In this embodiment, a mounting groove 12 communicating with the mounting notch 11 is provided in the loading platform 1, and the locking member 4 and the transmission member 6 are installed together in the mounting groove 12. The front and rear end walls of the support block 3 are provided with locking grooves 31. When locking, the driving member 5 drives the transmission member 6 to rotate to drive the locking member 4 to move into the locking groove 31 to lock and fix the support block 3; when unlocking, the driving member 5 drives the transmission member 6 to rotate to drive the locking member 4 to return to the mounting groove 12 to release the locking and fixing force on the support block 3. In this structure, the driving member 5 is rotated to generate a force to drive the transmission member 6 to drive the locking member 4 to move into the locking groove 31 on the support block 3 to form a clamping fixation. When unlocking, the driving member 5 drives the locking member 4 to return to the original position to release the locking and fixing force. The structure is simple and reliable, and the operation is convenient.

[0036] In this embodiment, the locking member 4 includes a front locking block 41 and a rear locking block 42, which are slidably mounted in the mounting groove 12, and are provided with racks connected to the transmission member 6. When locking, the front locking block 41 is driven by the driving member 5 to slide into the locking groove 31 on the front end wall of the support block 3, and the rear locking block 42 is driven by the driving member 5 to slide into the locking groove 31 on the rear end wall of the support block 3 to lock and fix the support block 3; when unlocking, the driving member 5 drives the transmission member 6 to rotate to simultaneously drive the front locking block 41 and the rear locking block 42 to slide into the mounting groove 12 to release the locking and fixing force on the support block 3. In this structure, the front locking block 41 and the rear locking block 42 are provided to lock and fix the support block 3 front and back, and the connection is firm and reliable.

[0037] In this embodiment, the driving member 5 includes a worm 51 and a crank 52. The worm 51 is movably mounted in the loading platform 1 through a bearing. One end of the worm 51 is located in the mounting groove 12 and is provided with a helical tooth 511 connected to the transmission member 6. The other end extends to the end surface of the loading platform 1 and is provided with a slot 512 for engaging with the crank 52. In this structure, the crank 52 and the worm 51 are separately arranged. When the worm 51 needs to be rotated, the worm 51 is rotated by engaging the crank 52 with the slot 512. The operation is simple and convenient.

[0038] In this embodiment, a torsion spring 7 is arranged in the mounting groove 12, and the torsion spring 7 is connected to the end of the worm 51. In this structure, the torsion spring 7 is connected to the end of the worm 51, and when the support block 3 is locked, the torsion spring 7 is in a tight state, so that a certain force can be generated to tighten the worm 51. When the worm 51 rotates counterclockwise, the torsion spring 7 will continue to be tightened, generating resistance to hinder the rotation of the worm 51, thereby preventing the worm 51 from rotating and unlocking under the action of centrifugal force during the test.

[0039] In this embodiment, the transmission member 6 includes a turbine shaft 61 and a gear 62 mounted on the turbine shaft 61. The turbine shaft 61 is movably mounted in the mounting groove 12 through a bearing. The turbine on the turbine shaft 61 is meshed with the helical teeth 511, and the gear 62 is meshed with the racks on the front locking block 41 and the rear locking block 42. In this structure, the turbine is meshed with the helical teeth 511 on the worm 51, and its transmission ratio is relatively large. A slight deflection of the worm 51 does not affect the locking and fixing effect. The meshing connection between the turbine and the helical teeth on the worm 51 itself has a self-locking effect. After the worm 51 stops rotating, the turbine cannot drive the worm 51 to rotate. Specifically, the front locking block 41 is configured to be hook-shaped, and the front locking block 41 is connected to the bottom of the gear 62 through a rack meshing connection, and the rear locking block 42 is configured to be long and strip-shaped, and it is meshed on the top of the gear 62 through a rack meshing connection. When the worm 51 is rotated clockwise, the gear 62 on the turbine shaft 61 rotates synchronously with the turbine, so that the front locking block 41 moves to the left to the locking groove 31 at the front end of the supporting block 3, and the rear locking block 42 moves to the right to the locking groove 31 at the rear end of the supporting block 3, thereby locking and fixing the supporting block 3 in the mounting notch 11.

[0040] In this embodiment, the support block 3 includes a support platform 32 and an insertion platform 33 disposed at the bottom of the support platform 32. The test specimen 2 is covered and fixed on the surface of the support platform 32, and the locking groove 31 is provided on the end wall of the insertion platform 33. In this structure, the test specimen 2 is supported and shaped by the support platform 32 so that it is flush with the surfaces of the loading platform 1 to form a seamless structure.

[0041] In this embodiment, positioning notches 331 are provided at both ends of the insertion platform 33, and positioning steps 111 are provided in the installation notch 11 to cooperate with the positioning notches 331. In this structure, the positioning notches 331 cooperate with the positioning steps 111 to facilitate the positioning and installation of the support block 3.

[0042] Embodiment 2:

[0043] In this embodiment, the bottom of the test specimen 2 is bent with a rim 21, and the rim 21 is fastened to the bottom of the support platform 32 by bolts 8. In this structure, the connection and fixation by bolts 8 are stable and firm.

[0044] Embodiment 3:

[0045] In this embodiment, the bottom of the test specimen 2 is bent with a rim 21, a slot 34 is provided between the bottom of the support platform 32 and the insertion platform 33, and the rim 21 is inserted into the slot 34. By providing the slot 34 at the bottom of the support platform 32 and plugging it into the rim 21, the test specimen 2 is stably mounted on the surface of the support platform 2 and is not easy to fall off.

[0046] Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Any technician familiar with the art can make many possible changes and modifications to the technical solution of the present invention by using the technical content disclosed above without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention should fall within the scope of protection of the technical solution of the present invention.

Claims

1. A worm self-locking non-marking rain erosion specimen locking mechanism, characterized in that: The invention comprises a loading platform (1), a test specimen (2), a support block (3), a locking member (4), a driving member (5) and a transmission member (6); the loading platform (1) is provided with a mounting notch (11) at a portion to be tested; the test specimen (2) is mounted on a surface of the support block (3); the locking member (4) and the transmission member (6) are arranged in the mounting notch (11); the driving member (5) is mounted in the loading platform (1) and is transmission-connected to the locking member (4) via the transmission member (6); When locking, the support block (3) is inserted into the installation notch (11), and the rotating driving member (5) drives the transmission member (6) to rotate to drive the locking member (4) to move and lock the support block (3), and the test specimen (2) on the surface of the support block (3) is flush with the surfaces of the loading platform (1) to form a surface seamless structure; when unlocking, the rotating driving member (5) drives the transmission member (6) to rotate to drive the locking member (4) to reset and release the locking force on the support block (3).

2. The worm self-locking traceless rain erosion specimen locking mechanism according to claim 1 is characterized in that: The loading platform (1) is provided with a mounting groove (12) which is in communication with the mounting notch (11); the locking member (4) and the transmission member (6) are installed together in the mounting groove (12); the front and rear end walls of the support block (3) are provided with locking grooves (31); when locking, the driving member (5) drives the transmission member (6) to rotate so as to drive the locking member (4) to move into the locking groove (31) to lock and fix the support block (3); when unlocking, the driving member (5) drives the transmission member (6) to rotate so as to drive the locking member (4) to return to the mounting groove (12) to release the locking and fixing force on the support block (3).

3. The worm self-locking traceless rain erosion specimen locking mechanism according to claim 2 is characterized in that: The locking member (4) comprises a front locking block (41) and a rear locking block (42), wherein the front locking block (41) and the rear locking block (42) are slidably mounted in the mounting groove (12), and racks connected to the transmission member (6) are arranged on the front locking block (41) and the rear locking block (42). When locking, the front locking block (41) is driven by the driving member (5) to slide into the locking groove (31) on the front end wall of the supporting block (3), and the rear locking block (42) is driven by the driving member (5) to slide into the locking groove (31) on the rear end wall of the supporting block (3) to lock and fix the supporting block (3); when unlocking, the driving member (5) drives the transmission member (6) to rotate so as to simultaneously drive the front locking block (41) and the rear locking block (42) to slide into the mounting groove (12) to release the locking and fixing force on the supporting block (3).

4. The worm self-locking traceless rain erosion specimen locking mechanism according to claim 3 is characterized in that: The driving member (5) comprises a worm (51) and a crank (52); the worm (51) is movably mounted in the loading platform (1) via a bearing; one end of the worm (51) is located in the mounting groove (12) and is provided with a helical tooth (511) connected to the transmission member (6); the other end extends to the end surface of the loading platform (1) and is provided with a slot (512) for engaging with the crank (52).

5. The worm self-locking traceless rain erosion specimen locking mechanism according to claim 4 is characterized in that: A torsion spring (7) is arranged in the installation groove (12), and the torsion spring (7) is connected to the end of the worm (51).

6. The worm self-locking non-marking rain erosion specimen locking mechanism according to claim 5 is characterized in that: The transmission member (6) comprises a turbine shaft (61) and a gear (62) mounted on the turbine shaft (61); the turbine shaft (61) is movably mounted in the mounting groove (12) via a bearing; the turbine on the turbine shaft (61) is meshedly connected with the helical teeth (511); and the gear (62) is simultaneously meshedly connected with the racks on the front locking block (41) and the rear locking block (42).

7. The worm self-locking traceless rain erosion specimen locking mechanism according to claim 6, characterized in that: The support block (3) comprises a support platform (32) and an insertion platform (33) arranged at the bottom of the support platform (32); the test specimen (2) is wrapped and fixed on the surface of the support platform (32); and the locking groove (31) is provided on the end wall of the insertion platform (33).

8. The worm self-locking traceless rain erosion specimen locking mechanism according to claim 7, characterized in that: Positioning notches (331) are provided at both ends of the insertion platform (33), and a positioning step (111) is also provided in the installation notch (11) for positioning in cooperation with the positioning notches (331).

9. The worm self-locking traceless rain erosion specimen locking mechanism according to claim 8, characterized in that: The bottom of the test specimen (2) is bent with an edge (21), and the edge (21) is fastened to the bottom of the support platform (32) by bolts (8).

10. The worm self-locking non-marking rain erosion specimen locking mechanism according to claim 8, characterized in that: The bottom of the test specimen (2) is bent with a rim (21), a slot (34) is provided between the bottom of the support platform (32) and the insertion platform (33), and the rim (21) is inserted into the slot (34).

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