A quick-change fixture for wind vane life test

Abstract

The present invention relates to the technical field of wind vane clamping. The present invention discloses a quick-change fixture for wind vane life testing, comprising a mounting seat, a resistance sheet fixed to the mounting seat, and a clamping portion, wherein the clamping portion is mounted on the mounting seat, and the clamping portion is used to limit the wind vane and make the wind vane cooperate with the resistance sheet. The clamping portion comprises: a cylinder, mounted on the mounting seat; a limiting ring 1 and a limiting ring 2, both slidably arranged in the cylinder, and the inner sides of the limiting ring 1 and the limiting ring 2 are provided with a clamping portion driven by air pressure, and the clamping portion is used to radially clamp the wind vane. The present invention uses the limiting ring 1 and the limiting ring 2 driven by air pressure to slide and adjust along the axial direction of the cylinder, combined with the radial clamping of the cross block 1 and the cross block 2 and the extrusion fixation with the inner wall of the cylinder, and can adapt to wind vane bodies and square drives of different sizes and shapes. The position of the barrier layer is adjustable, and it is effectively compatible with square drives of different depths, solving the problem of loose fixation of traditional fixtures due to model differences.

Description

Technical Field

[0001] The invention relates to the technical field of wind vane clamping, in particular to a wind vane life test quick-change fixture. Background Art

[0002] As a highly efficient pneumatic assembly tool, pneumatic wrenches are widely used in automotive manufacturing, rail transportation, aerospace, and heavy machinery assembly. Their core function is to achieve high torque output through compressed air drive, meeting the needs of rapid tightening of high-strength bolts. However, as a frequently used industrial tool, the fatigue life of the pneumatic wrench's core components directly determines the equipment's reliability and maintenance costs. Therefore, during the development and before shipment of pneumatic wrenches, they must undergo life tests simulating actual operating conditions to evaluate their durability, sealing, and dynamic stability. During this process, the design of the test fixture directly affects test efficiency, data accuracy, and equipment maintenance costs.

[0003] It is important to remove parts from the same batch of pneumatic wrenches for testing to ensure good stability. Currently, pneumatic wrenches are tested by running them under no-load and load conditions, with the "square drive" of the pneumatic wrench aligned with the life test equipment. However, when the "square drive" is aligned with the life test equipment, the pneumatic wrench must be fixed to ensure stability and avoid vibration.

[0004] The current problem is that when fixing the pneumatic wrench, it needs to be fixed according to the position of the "square drive" and the life test equipment. Different pneumatic wrenches have certain differences in the "square drive" and the pneumatic wrench body, and when fixing, they need to be fixed differently according to the differences. Therefore, vibration is easy to occur after fixing, causing the pneumatic wrench to be affected by vibration and inaccurate data. Summary of the Invention

[0005] The purpose of the present invention is to provide a quick-change fixture for wind vane life testing to solve the problems raised in the above background technology.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a quick-change fixture for testing the life of a wind vane, comprising a mounting base, a resistance sheet fixed to the mounting base, and a clamping portion, the clamping portion being mounted on the mounting base and used to limit the wind vane and enable the wind vane to cooperate with the resistance sheet, the clamping portion comprising:

[0007] The cylinder is mounted on the mounting base;

[0008] The first limiting ring and the second limiting ring are both slidably arranged in the cylinder. The inner sides of the first limiting ring and the second limiting ring are provided with a clamping part driven by air pressure, and the clamping part is used to clamp the wind vane radially;

[0009] An outer baffle is coaxial with the cylinder, and a telescopic shaft fixed by air pressure is connected between the outer baffle and the cylinder for axially clamping the wind vane;

[0010] The conduction tube is used for transmitting gas and is connected with the limiting ring 1, the limiting ring 2 and the telescopic shaft.

[0011] Furthermore, the inner wall of the cylinder is integrally provided with a matching strip extending along its axis, and the outer sides of the limiting ring 1 and the limiting ring 2 are provided with matching grooves that match the matching strip, so that the limiting ring 1 and the limiting ring 2 can slide along the cylinder.

[0012] Furthermore, a through-going mating opening is provided on the outer side of the cylinder, and the outer sides of the first and second limiting rings each have an air inlet end extending into the mating opening, and the air inlet end is connected to the conducting pipe;

[0013] The clamping part includes a cross block 1 and a cross block 2. The limiting ring 1 and the limiting ring 2 are both provided with an annular cavity which is circumferentially arranged and connected to the air inlet end. The limiting ring 1 and the limiting ring 2 are also provided with a cross groove 1 and a cross groove 2. One end of the cross groove 1 is connected to the annular cavity, and the other end passes through inward. One end of the cross groove 2 is connected to the annular cavity, and the other end passes through outward. The cross block 1 and the cross block 2 are respectively located in the cross groove 1 and the cross groove 2. When air is taken into the annular cavity, the cross block 1 and the cross block 2 extend inward and outward respectively for support.

[0014] Furthermore, the cross groove 1 and the cross block 1 are both arranged circumferentially, which are used to support the internal wind vane in the circumferential direction. The cross block 2 in the limiting ring 1 and the limiting ring 2 is used to resist the inner wall of the limiting ring 1 and the limiting ring 2 respectively.

[0015] Furthermore, the limiting ring has a blocking layer at each end, a circular hole passes through the axis of the blocking layer, and a polygonal end is integrally provided at the axis of the resistance plate, the polygonal end extends into the circular hole, and the output end of the wind vane has a square drive that cooperates with the polygonal end, and the square drive is against the end face of the blocking layer.

[0016] Furthermore, the second limiting ring is annular and can be located inside the cylinder and move axially to fix the wind vane.

[0017] Furthermore, the telescopic shaft includes a sleeve shaft, a sleeve, an outer extension tube and a resistance shaft;

[0018] The sleeve is sleeved with the sleeve, and the sleeve has a spring in a stretched state inside. The outer extension tube is integrally formed with the sleeve and is perpendicular to the sleeve. The resistance shaft is sleeved in the outer extension tube, and the outer end of the outer extension tube is connected to the conduction tube. When there is air pressure inside the outer extension tube, the resistance shaft is pushed against the sleeve to fix the position of the sleeve.

[0019] Furthermore, the outer extension tube and the resistance shaft are sealed.

[0020] Furthermore, a protective frame is fixed on the mounting seat, and the protective frame can be opened and closed and rests against the upper end of the wind vane.

[0021] Furthermore, the outer side of the resistance sheet is provided with a resistance disk for adjusting the resistance of the resistance sheet.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. Air-driven stop rings 1 and 2 slide and adjust along the cylinder's axial direction. Combined with cross blocks 1 and 2, which clamp radially and squeeze against the cylinder's inner wall, the system adapts to various sizes and shapes of wind vanes and square drives. Combined with the adjustable position of the barrier layer, it effectively accommodates square drives of varying depths, resolving the issue of insecure fixation associated with traditional clamps due to model variations.

[0024] 2. Multiple groups of cross blocks are evenly distributed around the circumference to clamp the wind vane body. Air pressure drives cross block 2 to lock the position of limit ring 1 and limit ring 2 outward to form a constraint. The telescopic shaft is preloaded with a spring to achieve initial fit on the outer baffle. After that, air pressure is used to fully limit the wind vane to prevent circumferential displacement and vibration of the wind vane during the test.

[0025] 3. The air wrench is limited in axial and radial directions by air pressure, which effectively reduces the clamping time and facilitates quick replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0027] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 This is a schematic diagram of the structure of the components on the upper end of the mounting base of the present invention;

[0029] Figure 3 This is a schematic diagram of the exploded structure of the resistance sheet and the clamping part of the present invention;

[0030] Figure 4 It is a schematic diagram of the exploded structure of the card connector of the present invention;

[0031] Figure 5 This is a schematic diagram of a half-section structure of the limiting ring of the present invention;

[0032] Figure 6 This is a schematic diagram of the two-half cross-section structure of the limiting ring of the present invention;

[0033] Figure 7 This is a schematic diagram of the partial cross-section structure of the telescopic shaft of the present invention;

[0034] Figure 8 This is a schematic diagram of the half-section structure of the resistance plate and the clamping part of the present invention;

[0035] Figure 9 This is a schematic diagram of the structure of the square drive and the polygonal end of the present invention;

[0036] Figure 10 This is a schematic diagram of the structure of the square drive and the polygonal end of the present invention;

[0037] Figure 11 It is a schematic diagram of the matching structure of the square drive and the polygonal end of the present invention.

[0038] In the figure: 1. Mounting seat; 2. Protective frame; 3. Resistance plate; 31. Polygonal end; 32. Resistance disk; 4. Clamping part; 41. Cylinder; 411. Matching strip; 412. Matching opening; 42. Limiting ring 1; 421. Matching groove; 422. Air inlet end; 423. Barrier layer; 424. Round hole; 43. Limiting ring 2; 44. Outer blocking plate; 45. Telescopic shaft; 451. Sleeve shaft; 452. Sleeve; 453. Outer extension tube; 454. Resistance shaft; 46. Conducting tube; 47. Clamping part; 471. Annular cavity; 472. Cross groove 1; 473. Cross block 1; 474. Cross groove 2; 475. Cross block 2; 5. Square drive. DETAILED DESCRIPTION

[0039] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0040] See also Figures 1-11 The present invention provides a technical solution: a quick-change fixture for testing the life of a wind vane, comprising a mounting base 1, a resistance sheet 3 fixed to the mounting base 1, and a clamping portion 4, which is mounted on the mounting base 1 and is used to limit the wind vane and enable the wind vane to cooperate with the resistance sheet 3. The clamping portion 4 includes:

[0041] Cylinder 41 is mounted on the mounting base 1;

[0042] The first limiting ring 42 and the second limiting ring 43 are both slidably disposed in the cylinder 41. The inner sides of the first limiting ring 42 and the second limiting ring 43 are provided with a clamping portion 47 driven by air pressure. The clamping portion 47 is used to clamp the wind vane radially.

[0043] The outer baffle 44 is coaxial with the cylinder 41. A telescopic shaft 45 fixed by air pressure is connected between the outer baffle 44 and the cylinder 41 to clamp the wind vane axially.

[0044] The conducting tube 46 is used for transmitting gas and is connected to the limiting ring 1 42 , the limiting ring 2 43 and the telescopic shaft 45 .

[0045] Specifically, a limiting ring 1 42 and a limiting ring 2 43 that can slide are installed inside the cylinder 41. There are clamping parts 47 inside the limiting ring 1 42 and the limiting ring 2 43. The limiting ring 1 42 and the limiting ring 2 43 can move along the cylinder 41, and when there is air pressure inside the conductive tube 46, the clamping parts 47 inside the limiting ring 1 42 and the limiting ring 2 43 can generate air pressure, so that the clamping parts 47 extend inward to clamp the wind vane. In addition, the clamping parts 47 can also extend outward to clamp the limiting ring 1 42 and the limiting ring 2 43. The position limit inside the cylinder 41 ensures that the wind vane is radially limited. The outer baffle 44 is connected to the cylinder 41 through the telescopic shaft 45. The telescopic shaft 45 has a spring in a stretched state inside. Under the action of the spring, the outer baffle 44 is driven to move and the wind vane is pushed inward, so that the square drive 5 of the wind vane is against the blocking layer 423 of the limiting ring 42, and the wind vane is limited axially. It should be noted that under the action of air pressure, the position of the telescopic shaft 45 is also in a fixed state, ensuring that the square drive 5 of the wind vane avoids large friction and the wind vane is completely limited.

[0046] The inner wall of the cylinder 41 is integrally provided with a matching strip 411 extending along its axis. The outer sides of the limiting ring 1 42 and the limiting ring 2 43 are both provided with matching grooves 421 that match with the matching strip 411, so that the limiting ring 1 42 and the limiting ring 2 43 can slide along the cylinder 41.

[0047] The limiting ring 1 42 and the limiting ring 2 43 in the cylinder 41 can only move along the axial direction of the cylinder 41 to avoid rotation, thereby ensuring that rotation is avoided when the wind vane is limited.

[0048] The outer side of the cylinder 41 is provided with a through-hole 412. The outer sides of the first and second limiting rings 42 and 43 are provided with air inlet ends 422 extending into the fitting hole 412. The air inlet ends 422 are connected to the conducting tube 46.

[0049] The clamping portion 47 includes a cross block 1 473 and a cross block 2 475. A circumferentially arranged annular cavity 471 connected to the air inlet end 422 is provided in the limiting ring 1 42 and the limiting ring 2 43. A cross groove 1 472 and a cross groove 2 474 are also provided in the limiting ring 1 42 and the limiting ring 2 43. One end of the cross groove 1 472 is connected to the annular cavity 471, and the other end passes through inward. One end of the cross groove 2 474 is connected to the annular cavity 471, and the other end passes through outward. The cross block 1 473 and the cross block 2 475 are respectively located in the cross groove 1 472 and the cross groove 2 474. When air is taken in to the annular cavity 471, the cross block 1 473 and the cross block 2 475 extend inward and outward respectively for support.

[0050] Specifically, the air inlet ends 422 of the first limiting ring 42 and the second limiting ring 43 can move along the mating opening 412. The first limiting ring 42 and the second limiting ring 43 can also be easily changed in position. Because the shapes of different models of air vanes are different, the second limiting ring 43 can be fixed at the position where the air vane is most easily fixed when it moves, thereby limiting the air vane.

[0051] Each of the limiting ring 1 42 and the limiting ring 2 43 has an annular cavity 471 inside, and the inside of the annular cavity 471 is connected to the conductive tube 46. During the gas transmission process of the conductive tube 46, the pressure inside the annular cavity 471 changes, which pushes the cross block 1 473 to move inward and also pushes the cross block 2 475 to move outward. Based on this, the air vane is fixed inward and the limiting ring 1 42 and the limiting ring 2 43 are fixed outward. From the movable adjustment position of the limiting ring 1 42 and the limiting ring 2 43 to the fixed position of the limiting ring 1 42 and the limiting ring 2 43 and the cylinder 41 and the air vane, it is easy to operate and can adapt to air vanes of different specifications.

[0052] The cross slot 1 472 and the cross block 1 473 both have multiple circumferential arrangements for supporting the internal wind vane in a circumferential direction. The cross block 2 475 in the limiting ring 1 42 and the limiting ring 2 43 are respectively used to abut against the inner walls of the limiting ring 1 42 and the limiting ring 2 43 to fix the wind vane in the circumferential direction.

[0053] One end of the limiting ring 42 has a blocking layer 423, and a circular hole 424 passes through the axis of the blocking layer 423. The axis of the resistance plate 3 is integrally provided with a polygonal end 31, which extends into the circular hole 424. The output end of the wind vane has a square drive 5 that cooperates with the polygonal end 31, and the square drive 5 is against the end face of the blocking layer 423.

[0054] Specifically, the blocking layer 423 is used to offset the square drive 5. However, when the length, depth and shallowness of the square drive 5 change, it is necessary to move the limiting ring 42 so that the blocking layer 423 and the square drive 5 are offset. Figure 9 、 Figure 10 、 Figure 11 As shown, Figure 9 The square drive 5 is fully matched with the polygonal end 31 and is against the barrier layer 423. Figure 10 Since the square drive 5 is fully matched with the polygonal end 31 but the length is short, it is necessary to move the limiting ring 42 so that the blocking layer 423 is against the square drive 5. Figure 11 The square drive 5 is not fully matched with the polygonal end 31 because the square drive 5 is too long, but the blocking layer 423 still abuts against the square drive 5. Therefore, according to the change of the square drive 5, the position of the limit ring 42 is manually controlled so that the blocking layer 423 of the limit ring 42 abuts against the square drive 5, and the rear end of the wind vane abuts against the outer baffle 44. Subsequently, under the action of air pressure, complete limiting is achieved.

[0055] The second limiting ring 43 is annular and can be located inside the cylinder 41 and move axially to fix the wind vane. The second limiting ring 43 can be sleeved on the wind vane and can move to different positions of the wind vane to fix the wind vane.

[0056] The telescopic shaft 45 includes a sleeve shaft 451, a sleeve 452, an outer extension tube 453 and a resistance shaft 454;

[0057] The sleeve 451 is sleeved with the sleeve 452, and the sleeve 452 has a spring in a stretched state inside. The outer extension tube 453 is integrally formed with the sleeve 452 and is perpendicular to the sleeve 452. The resistance shaft 454 is sleeved in the outer extension tube 453, and the outer end of the outer extension tube 453 is connected to the conductive tube 46. When there is air pressure inside the outer extension tube 453, the resistance shaft 454 is pushed against the sleeve 451 to fix the position of the sleeve 451.

[0058] Specifically, after the wind vane is limited, it needs to be completely fixed by air pressure. The telescopic shaft 45 is fixed, which means that the outer baffle 44 is fixed. Therefore, when there is air pressure inside the outer extension tube 453, the resistance shaft 454 is pushed against the sleeve shaft 451 to fix the position of the sleeve shaft 451.

[0059] The outer extension tube 453 and the resistance shaft 454 are sealed so that the resistance shaft 454 can move under the action of air pressure.

[0060] A protective frame 2 is fixed on the mounting base 1. The protective frame 2 can be opened and closed and abuts against the upper end of the wind vane to prevent the wind vane from flying outwards due to unsecured fixation.

[0061] The outer side of the resistance plate 3 is also provided with a resistance disk 32 for adjusting the resistance of the resistance plate 3 to achieve testing of different resistances of the wind vane.

[0062] The working principle of the present invention is as follows: In the initial stage, the transmission tube 46 is connected to the air pump but is in the off state. The outer baffle 44 is manually pulled outward, causing the spring inside the telescopic shaft 45 to stretch. The wind vane is placed inside the cylinder 41, and the outer end of the square drive 5 of the wind vane is abutted against the barrier layer 423, and the square drive 5 is matched with the polygonal end 31. Then, the outer baffle 44 is loosened and moved inward under the action of the spring of the telescopic shaft 45, so that the outer end of the square drive 5 at the end of the wind vane abuts against the barrier layer 423, and the other end of the wind vane abuts against the outer baffle 44, thereby preliminarily fixing the wind vane.

[0063] In the next stage, the conduction tube 46 transmits gas, causing the annular cavity 471 of the limiting ring 1 42 and the limiting ring 2 43 to generate air pressure, driving the cross block 1 473 to move inward and driving the cross block 2 475 to move outward, so that multiple groups of cross blocks 1 473 clamp the wind vane, and the cross block 2 475 is squeezed against the inner wall of the cylinder 41, so that the positions of the limiting ring 1 42 and the limiting ring 2 43 are fixed and the wind vane is clamped radially at the same time. Secondly, the air pressure also pushes the resistance shaft 454 to move along the outer extension tube 453 and resist against the sleeve shaft 451, fixing the relative positions of the sleeve shaft 451 and the sleeve 452, and the position of the outer baffle 44 is fixed, so that the axial position of the wind vane is fixed.

[0064] The above-mentioned method fixes the radial and axial positions of the wind vane by air pressure, so that the position of the wind vane is completely restricted. The square drive 5 of the wind vane remains stable during rotation to avoid vibration that affects the test results. In addition to completely restricting the wind vane, the wind vane can also be quickly installed and disassembled, and different batches of wind vanes can be tested quickly and continuously.

[0065] It should be noted that, due to the different sizes of wind vanes, even the same specifications of square drive 5 have different depths, such as Figure 9 、 Figure 10 and Figure 11 The figure shows square drives 5 of different depths. In order to completely limit the square drive 5, it is necessary to make the end of the square drive 5 abut against the blocking layer 423 of the limiting ring 42, and make the rear end of the wind vane abut against the outer baffle 44 to achieve complete limiting. In addition, it should be noted that due to the limited recovery effect of the spring in the telescopic shaft 45, it will not cause excessive friction between the position where the rear end of the wind vane abuts against the outer baffle 44 and the position where the end of the square drive 5 abuts against the blocking layer 423 of the limiting ring 42. It only achieves fitting limiting. Under the action of air pressure, the position of the limiting ring 42 and the outer baffle 44 is fixed, so that even during the operation of the square drive 5, no vibration will be generated.

[0066] As mentioned above, even if the square drive 5 has the same specifications, there are differences in depth, such as Figure 9 、 Figure 10 and Figure 11 The dotted line is the location of the wind vane. Figure 9The square drive 5 shown just matches the polygonal end 31 and just contacts the barrier layer 423. Figure 10 As shown, the square drive 5 cooperates with the polygonal end 31, but fails to abut against the blocking layer 423. Therefore, it is necessary to move the limiting ring 42 to make the square drive 5 abut against the blocking layer 423. Figure 11 As shown, the square drive 5 cooperates with the polygonal end 31. The depth of the square drive 5 is greater than the length of the polygonal end 31, which can also make the square drive 5 counteract the blocking layer 423. Based on this, when the square drives 5 with different depths cooperate with the polygonal end 31, the wind vane can be completely limited by moving the limit ring 42.

[0067] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0068] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or substitute equivalents for some of the technical features. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A quick-change fixture for wind vane life test, comprising a mounting seat (1) and a resistance sheet (3) fixed to the mounting seat (1), characterized in that: The clamping part (4) is mounted on the mounting seat (1), and the clamping part (4) is used to limit the wind vane and make the wind vane cooperate with the resistance piece (3). The clamping part (4) includes: a cylinder (41) mounted on the mounting seat (1); a limiting ring (42) and a limiting ring (43) both slidably arranged in the cylinder (41), and the inner sides of the limiting ring (42) and the limiting ring (43) are provided with a clamping part (47) driven by air pressure, and the clamping part (47) is used to clamp the wind vane radially; an outer baffle (44) is coaxial with the cylinder (41), and a telescopic shaft (45) fixed by air pressure is connected between the outer baffle (44) and the cylinder (41) for axially clamping the wind vane; a conducting pipe (46) for transmitting gas, connected to the limiting ring (42), the limiting ring (43) and the telescopic shaft (45); The inner wall of the cylinder (41) is integrally provided with a matching strip (411) extending along its axis, and the outer sides of the limiting ring 1 (42) and the limiting ring 2 (43) are provided with matching grooves (421) matching with the matching strip (411), so that the limiting ring 1 (42) and the limiting ring 2 (43) can slide along the cylinder (41); The outer side of the cylinder (41) is provided with a through-set fitting opening (412), and the outer sides of the limiting ring 1 (42) and the limiting ring 2 (43) are provided with an air inlet end (422) extending into the fitting opening (412), and the air inlet end (422) is connected to the conducting tube (46); the clamping portion (47) includes a cross block 1 (473) and a cross block 2 (475), and the limiting ring 1 (42) and the limiting ring 2 (43) are provided with an annular cavity (471) which is circumferentially arranged and communicated with the air inlet end (422), and the limiting ring 1 (42) and the limiting ring 2 are provided with an annular cavity (471) which is circumferentially arranged and communicated with the air inlet end (422). (43) is also provided with a cross groove 1 (472) and a cross groove 2 (474), one end of the cross groove 1 (472) is connected to the annular cavity (471), and the other end thereof is passed through inward, one end of the cross groove 2 (474) is connected to the annular cavity (471), and the other end thereof is passed through outward, the cross block 1 (473) and the cross block 2 (475) are respectively located in the cross groove 1 (472) and the cross groove 2 (474), and when the annular cavity (471) is inlet, the cross block 1 (473) extends inward, and the cross block 2 (475) extends outward for support; The cross groove 1 (472) and the cross block 1 (473) are both provided with a plurality of circumferentially arranged ones for supporting the internal wind vane in the circumferential direction, and the cross block 2 (475) in the limiting ring 1 (42) and the limiting ring 2 (43) are respectively used to abut against the inner wall of the limiting ring 1 (42) and the limiting ring 2 (43); One end of the limiting ring (42) has a blocking layer (423), and a circular hole (424) passes through the axis of the blocking layer (423). The axis of the resistance plate (3) is integrally provided with a polygonal end (31), and the polygonal end (31) extends into the circular hole (424). The output end of the wind vane has a square drive (5) that cooperates with the polygonal end (31), and the square drive (5) abuts against the end face of the blocking layer (423); The second limiting ring (43) is annular and can be located inside the cylinder (41) and move axially to fix the wind vane; The telescopic shaft (45) includes a sleeve (451), a sleeve (452), an outer extension tube (453) and a resistance shaft (454); the sleeve (451) is sleeved with the sleeve (452); a spring in a tensioned state is provided inside the sleeve (452); the outer extension tube (453) and the sleeve (452) are integrally formed and perpendicular to the sleeve (452); the resistance shaft (454) is sleeved inside the outer extension tube (453); the outer end of the outer extension tube (453) is connected to the conductive tube (46); when there is air pressure inside the outer extension tube (453), the resistance shaft (454) is pushed against the sleeve (451), thereby fixing the position of the sleeve (451); A seal is formed between the outer extension tube (453) and the resistance shaft (454); A protective frame (2) is fixed on the mounting seat (1); the protective frame (2) can be opened and closed and rests against the upper end of the wind vane.

2. The quick-change fixture for wind vane life test according to claim 1 is characterized in that: The resistance plate (3) is further provided with a resistance disk (32) on the outside thereof, for adjusting the resistance of the resistance plate (3).

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