Tool for testing torque of torsional spring of folding rudder

Abstract

The utility model discloses a tool for testing the torque of a torsional spring of a folding rudder. The tool comprises a fixed seat, a positioning column, a clamping piece, a connecting cylinder, a torque sensor and a worm and gear box, the clamping piece comprises a mounting block, a clamping plate, a pressing rod, a spring barrel, a contact rod and a compression spring; wherein the mounting block is in sliding connection with the connecting cylinder or is fixedly connected with the positioning column; the clamping plate is movably connected with the mounting block, the spring cylinder is fixedly connected with the mounting block, the pressing rod is fixedly connected with the clamping plate, the contact rod is fixedly connected with the pressing rod, and the compression spring is arranged in the spring cylinder; one end of the contact rod extends into the spring cylinder and is connected with the compression spring; a mounting groove is formed in the mounting block, and a clamping groove matched with the mounting groove is formed in the clamping plate. The effect of rapidly opening and clamping the end of the torsional spring is achieved through the functions that a pressing rod in the clamping piece pushes a clamping plate to move and a compression spring is reset and clamped, and the technical problems that a traditional clamping structure is complex in operation and low in clamping efficiency are solved.

Description

Technical Field

[0001] This utility model belongs to the field of testing tooling technology, specifically a tooling for testing the torque of a folding rudder torsion spring. Background Technology

[0002] In aerospace, precision machinery, and other fields, folding control surfaces are key components of aircraft aerodynamic control. The torque performance of their core actuator, the torsion spring, directly affects the control surface deployment accuracy and system reliability. Torsion spring torque testing needs to simulate torsional conditions in actual operation and accurately measure its elastic restoring force characteristics. Therefore, it places extremely high demands on the structural rationality, ease of operation, and data accuracy of the testing fixture. Existing testing fixtures need to balance rapid positioning of the torsion spring installation, dynamic adaptive adjustment during the torsion process, and accurate acquisition of torque signals. The clamping mechanism, as the key interface connecting the torsion spring and the transmission system, directly determines the testing efficiency and the reliability of the results.

[0003] Existing torsion spring torque testing fixtures typically employ rigid manual clamping methods such as bolt tightening and clip clamping. Operators must repeatedly adjust the clamp spacing, align the torsion spring ends, and tighten the fasteners sequentially, with each clamping process taking 2-5 minutes and heavily reliant on operator experience. Furthermore, these structures lack adaptive adjustment mechanisms. When the axial length of the torsion spring changes due to specification differences or torsional deformation, the rigid fixture cannot adjust the spacing synchronously, requiring manual disassembly and repositioning, further extending assembly time. Simultaneously, it is difficult to ensure uniform clamping force during manual clamping, leading to slippage or localized damage to the torsion spring ends and frequent rework of pre-test preparation. These problems result in assembly time accounting for over 40% in batch testing scenarios, severely hindering testing efficiency. Moreover, the uncertainty of manual operation exacerbates the dispersion of test data, making it difficult to meet the demands of modern industrial production for efficient and accurate testing.

[0004] Patent application CN202420944281.5 discloses a torsion spring detection and positioning fixture. When using this device to assemble torsion springs, the fixing plate of the second limiting part and the limiting pressure plate are connected by a positioning shoulder, a positioning groove, and a first fastener. The positioning structure needs to be manually aligned and the screws tightened sequentially for fixation. Each clamping operation requires at least two fastener operations, making the process cumbersome. Therefore, when using this structure for detection, the assembly time is relatively long, affecting the efficiency of the detection. Utility Model Content

[0005] The purpose of this invention is to provide a tooling for testing the torque of a folding rudder torsion spring, so as to solve the following technical problems mentioned in the background art:

[0006] Existing spring torque testing fixtures suffer from long assembly times, which affects testing efficiency.

[0007] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0008] A fixture for testing the torque of a folding rudder torsion spring includes a fixed base, a positioning post, clamping components, a connecting cylinder, a torque sensor, and a worm gear box. The connecting cylinder is rotatably connected to the fixed base, and both ends of the torque sensor are connected to the worm gear box and the connecting cylinder, respectively. The positioning post is fixedly connected to one side of the fixed base. Two clamping components are provided, each connected to the connecting cylinder and the positioning post, respectively, and are used to clamp both ends of the torsion spring. The clamping component connected to the connecting cylinder slides in the axial direction of the connecting cylinder. The clamping component includes a mounting block, a clamping plate, a pressure rod, a spring cylinder, a contact rod, and a compression spring. The mounting block is slidably connected to the connecting cylinder or fixedly connected to the positioning post. The clamping plate is movably connected to the mounting block, the spring cylinder is fixedly connected to the mounting block, the pressure rod is fixedly connected to the clamping plate, the contact rod is fixedly connected to the pressure rod, and the compression spring is disposed inside the spring cylinder. One end of the contact rod extends into the spring cylinder and connects to the compression spring. The mounting block has a mounting groove, and the clamping plate has a clamping groove that mates with the mounting groove.

[0009] Furthermore, it also includes a base, and the worm gear box, torque sensor, fixing seat and positioning column are all fixed to the base.

[0010] Furthermore, a first coupling and a second coupling are respectively provided at both ends of the torque sensor. The torque sensor is connected to the connecting cylinder through the first coupling, and the torque sensor is connected to the worm gear box through the second coupling.

[0011] Furthermore, the connecting cylinder includes a cylinder body, a sliding limit rod, and a fixing head; the fixing head is fixedly connected to the cylinder body, and the sliding limit rod is fixedly connected to the fixing head and located inside the cylinder body; a movable groove is provided on one side of the cylinder body; a connecting head is fixedly connected to the bottom of the mounting block in the clamping member located on one side of the connecting cylinder, the connecting head is slidably connected to the sliding limit rod, and the bottom side of the mounting block is slidably connected in the movable groove.

[0012] Furthermore, the sliding limit rod has a rectangular cross-section and is equipped with scale lines.

[0013] Furthermore, the worm gear box is connected to a hand crank.

[0014] Furthermore, a bearing is provided on the fixed base, and the connecting cylinder is connected to the bearing. The connecting cylinder is rotatably connected to the fixed base through the bearing.

[0015] Furthermore, the inner wall of the groove is provided with a rubber pad.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] This invention achieves the effect of quickly opening and clamping the end of the torsion spring by using the pressure rod in the clamping component to push the clamping plate to move and compressing the spring to reset and clamp. This solves the technical problems of cumbersome operation and low clamping efficiency of traditional clamping structures.

[0018] This invention achieves the effect of adaptive adjustment of the clamping member as the length of the torsion spring changes with the torsion spring by allowing the clamping member connected to the connecting cylinder to slide axially. This solves the technical problem of the torsion spring being affected by stress and thus interfering with the accuracy of torque testing in traditional tooling due to the fixed ends.

[0019] This invention achieves precise control of the rotation angle and torque of the connecting cylinder by using a worm gear box to drive the connecting cylinder to rotate, thus solving the technical problem that it is difficult to accurately adjust the amount of torque by manually rotating directly. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the clamping component of this utility model;

[0022] Figure 3 This is a cross-sectional schematic diagram of the clamping component and connecting cylinder of this utility model;

[0023] Figure 4 This is a cross-sectional view of the connecting cylinder of this utility model.

[0024] The markings in the diagram are: 1-base, 2-fixed seat, 3-positioning column, 4-movable groove, 5-clamping component, 6-torsion spring, 7-connecting cylinder, 8-first coupling, 9-torque sensor, 10-second coupling, 11-worm gear box, 12-hand crank, 13-clamping plate, 14-mounting groove, 15-connector, 16-mounting block, 17-pressure rod, 18-spring cylinder, 19-compression spring, 20-contact rod, 21-clamping groove, 22-sliding limit rod, 23-cylinder body, 25-fixed head. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Example:

[0027] A fixture for testing the torque of a folding rudder torsion spring includes a fixed base 2, a positioning post 3, clamping members 5, a connecting cylinder 7, a torque sensor 9, and a worm gear box 11. The connecting cylinder 7 is rotatably connected to the fixed base 2, and the two ends of the torque sensor 9 are respectively connected to the worm gear box 11 and the connecting cylinder 7. The positioning post 3 is fixedly connected to one side of the fixed base 2. Two clamping members 5 are provided, and the two clamping members 5 are respectively connected to the connecting cylinder 7 and the positioning post 3. The clamping members 5 are used to clamp the two ends of the torsion spring 6. Among them, the clamping member 5 connected to the connecting cylinder 7 slides in the axial direction of the connecting cylinder 7. The clamping member 5 includes a mounting block 1. 6. Clamping plate 13, pressure rod 17, spring cylinder 18, contact rod 20, and compression spring 19; wherein, mounting block 16 is slidably connected to connecting cylinder 7 or fixedly connected to positioning post 3; clamping plate 13 is movably connected to mounting block 16, spring cylinder 18 is fixedly connected to mounting block 16, pressure rod 17 is fixedly connected to clamping plate 13, contact rod 20 is fixedly connected to pressure rod 17, and compression spring 19 is disposed inside spring cylinder 18; one end of contact rod 20 extends into spring cylinder 18 and is connected to compression spring 19; mounting block 16 is provided with mounting groove 14, and clamping plate 13 is provided with clamping groove 21 that mates with mounting groove 14.

[0028] The worm gear box 11 drives the connecting cylinder 7 to rotate. The torque sensor 9 senses the torque, converts the physical change of torque into a precise electrical signal, and transmits it to the central processing unit. The central processing unit processes the electrical signal to obtain the magnitude of the torque.

[0029] Specifically, in use, the torsion spring 6 is fitted onto the connecting cylinder 7. The pressure rod 17 is pressed down, causing it to push the clamping plate 13 to move and compress the spring 19 using the contact rod 20. After the clamping plate 13 moves, the clamping groove 21 on the clamping plate 13 aligns with the mounting groove 14 on the mounting block 16. Then, both ends of the torsion spring 6 are inserted into the mounting groove 14 and the clamping groove 21. After insertion, the pressure rod 17 is released, the spring 19 returns to its original position, and pushes the contact rod 20. The contact rod 20, through the pressure rod 17, drives the clamping plate 13 to move. The clamping plate 13 uses the clamping groove 21 to clamp both ends of the torsion spring 6 onto the clamping member 5. The connecting cylinder 7 rotates via the worm gear box 11. Simultaneously, the torque sensor 9 works with the central processing unit to detect the torque magnitude. When the connecting cylinder 7 rotates, the torsion spring 6 twists, and its length changes. At this time, the clamping member 5 connected to the connecting cylinder 7 can move with the change in the length of the torsion spring 6, thus ensuring the accuracy of the torque detection of the torsion spring 6.

[0030] In a preferred embodiment, the system further includes a base 1, and the worm gear box 11, torque sensor 9, fixing seat 2, and positioning column 3 are all fixedly connected to the base 1. The base 1 provides a stable support platform, which can improve the overall structural strength of the fixture and avoid test deviations caused by external vibration factors during testing.

[0031] In a preferred embodiment, a first coupling 8 and a second coupling 10 are respectively provided at both ends of the torque sensor 9. The torque sensor 9 is connected to the connecting cylinder 7 through the first coupling 8, and to the worm gear box 11 through the second coupling 10. The first coupling 8 and the second coupling 10 are used to absorb the radial, axial, and angular deviations of the output shaft of the connecting cylinder 7 and the worm gear box 11, so as to avoid additional stress affecting the torque measurement accuracy.

[0032] In a preferred embodiment, the connecting cylinder 7 includes a cylinder body 23, a sliding limiting rod 22, and a fixing head 25. The fixing head 25 is fixedly connected to the cylinder body 23, and the sliding limiting rod 22 is fixedly connected to the fixing head 25 and located inside the cylinder body 23. A movable groove 4 is provided on one side of the cylinder body 23. The bottom of the mounting block 16 in the clamping member 5 located on one side of the connecting cylinder 7 is fixedly connected to a connecting head 15. The connecting head 15 is slidably connected to the sliding limiting rod 22, and the bottom side of the mounting block 16 is slidably connected within the movable groove 4. The sliding limiting rod 22 cooperates with the connecting head 15 to restrict the radial movement of the mounting block 16, allowing it to slide only axially, ensuring that the clamping member 5 moves smoothly as the length of the torsion spring 6 changes. The movable groove 4 is slidably engaged with the bottom of the mounting block 16, further limiting the movement trajectory of the mounting block 16, preventing circumferential rotation, and ensuring the stability of the torsion center of the torsion spring 6.

[0033] In a preferred embodiment, the sliding limit rod 22 has a rectangular cross-section and is provided with scale lines. The rectangular cross-section restricts the connector 15 from rotating around the rod, ensuring that the mounting block 16 slides only axially, preventing the clamping member 5 from shifting circumferentially and affecting the torsion center of the torsion spring 6. The scale lines allow for direct reading of the sliding displacement of the mounting block 16, and, in conjunction with the torque sensor 9, enable simultaneous measurement and analysis of torque and deformation, improving the integrity of the test data.

[0034] In a preferred embodiment, the worm gear box 11 is connected to a hand crank 12. The hand crank 12 provides a manual drive mode, allowing precise control of the rotation angle and speed of the connecting cylinder 7 via the worm gear box 11, facilitating gradual adjustment of the torsion spring 6 by the tester; the self-locking characteristic of the worm gear maintains the position, improving operational flexibility and testing accuracy.

[0035] In a preferred embodiment, a bearing is provided on the fixed base 2, and the connecting cylinder 7 is connected to the bearing, with the connecting cylinder 7 rotatably connected to the fixed base 2 via the bearing. The bearing can reduce rotational friction between the connecting cylinder 7 and the fixed base 2, ensuring rotational flexibility; the bearing can constrain the axial position of the connecting cylinder 7, improving the accuracy of torsional motion; at the same time, the bearing can support radial loads, extending the service life of the tooling.

[0036] In a preferred embodiment, a rubber pad is provided on the inner wall of the clamping groove 21. The rubber elasticity buffers the clamping force, preventing surface indentations or scratches from appearing at both ends of the torsion spring 6.

[0037] In the description of this utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "side", "top", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, 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.

[0038] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "fixing," "screw connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0039] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fixture for testing the torque of a folding rudder torsion spring, characterized in that: It includes a fixed base (2), a positioning column (3), a clamping component (5), a connecting cylinder (7), a torque sensor (9), and a worm gear box (11); the connecting cylinder (7) is rotatably connected to the fixed base (2), and the two ends of the torque sensor (9) are connected to the worm gear box (11) and the connecting cylinder (7) respectively; the positioning column (3) is fixed to one side of the fixed base (2); There are two clamping parts (5), which are connected to the connecting cylinder (7) and the positioning column (3) respectively. The clamping parts (5) are used to clamp the two ends of the torsion spring (6); wherein, the clamping part (5) connected to the connecting cylinder (7) slides in the axial direction of the connecting cylinder (7); The clamping component (5) includes a mounting block (16), a clamping plate (13), a pressure rod (17), a spring cylinder (18), a contact rod (20), and a compression spring (19); wherein, the mounting block (16) is slidably connected to the connecting cylinder (7) or fixedly connected to the positioning column (3); the clamping plate (13) is movably connected to the mounting block (16), the spring cylinder (18) is fixedly connected to the mounting block (16), the pressure rod (17) is fixedly connected to the clamping plate (13), the contact rod (20) is fixedly connected to the pressure rod (17), and the compression spring (19) is disposed inside the spring cylinder (18); one end of the contact rod (20) extends into the spring cylinder (18) and is connected to the compression spring (19); the mounting block (16) is provided with a mounting groove (14), and the clamping plate (13) is provided with a clamping groove (21) that mates with the mounting groove (14).

2. The fixture for testing the torque of a folding rudder torsion spring according to claim 1, characterized in that: It also includes a base (1), a worm gear box (11), a torque sensor (9), a fixed seat (2), and a positioning column (3), all of which are fixed to the base (1).

3. The fixture for testing the torque of a folding rudder torsion spring according to claim 1, characterized in that: The torque sensor (9) is provided with a first coupling (8) and a second coupling (10) at its two ends respectively. The torque sensor (9) is connected to the connecting cylinder (7) through the first coupling (8) and to the worm gear box (11) through the second coupling (10).

4. The fixture for testing the torque of a folding rudder torsion spring according to claim 1, characterized in that: The connecting cylinder (7) includes a cylinder body (23), a sliding limit rod (22), and a fixing head (25); the fixing head (25) is fixedly connected to the cylinder body (23), the sliding limit rod (22) is fixedly connected to the fixing head (25) and located inside the cylinder body (23); a movable groove (4) is provided on one side of the cylinder body (23); the bottom of the mounting block (16) in the clamping member (5) located on one side of the connecting cylinder (7) is fixedly connected to the connecting head (15), the connecting head (15) is slidably connected to the sliding limit rod (22), and the bottom side of the mounting block (16) is slidably connected in the movable groove (4).

5. The fixture for testing the torque of a folding rudder torsion spring according to claim 4, characterized in that: The sliding limit rod (22) has a rectangular cross-section and scale lines are provided on the sliding limit rod (22).

6. The fixture for testing the torque of a folding rudder torsion spring according to claim 1, characterized in that: The worm gear box (11) is connected to a hand crank (12).

7. The fixture for testing the torque of a folding rudder torsion spring according to claim 1, characterized in that: The fixed base (2) is provided with a bearing, and the connecting cylinder (7) is connected to the bearing. The connecting cylinder (7) is rotatably connected to the fixed base (2) through the bearing.

8. The fixture for testing the torque of a folding rudder torsion spring according to claim 1, characterized in that: The inner wall of the groove (21) is provided with a rubber pad.

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