Novel height-adjustable and direction-adjustable lever connecting device and lever system
By designing an adjustable height and direction lever connection device, the problems of assembly failure and jamming caused by errors in the existing device are solved, thereby improving the accuracy of load loading and assembly efficiency, and adapting to loading on different curved surfaces.
Patent Information
- Application Number
- CN202520344640.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-01
- Publication Date
- 2025-12-23
- Estimated Expiration
- 2035-03-01
AI Technical Summary
Existing lever connection devices are prone to failure to assemble or forced assembly due to manufacturing errors and load handling errors during aircraft structural strength tests, affecting the accuracy of load application. Furthermore, traditional joints can cause the lever to jam below, making them unable to effectively adapt to curved surface loading.
A novel adjustable height and direction lever connection device was designed, including a fixed base, a single-ear connector and a ball-head connecting rod. The height, direction and angle can be adjusted through threaded connection and ball head structure to adapt to different lever connection needs.
It improves the accuracy of load application, simplifies system design, increases assembly efficiency, avoids pre-stress and jamming problems, and adapts to loading on different curved surfaces.
Smart Images
Figure CN223702970U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application belongs to the technical field of aircraft strength test, and particularly relates to a new type of lever connecting device with adjustable height and adjustable direction and a lever system. BACKGROUND
[0002] In ground verification test of aircraft structure strength, a tension and compression pad- lever system loading mode is a commonly used loading mode, and a connecting device between levers is an essential component in the loading process.
[0003] At present, the connecting mode of the tension and compression pad and the lever is an adjustable height universal joint, which can adapt to different section heights. However, the connecting mode between the levers is a fixed height and fixed direction connecting device, the lower surface of the device is connected with the force arm center of the upper lever, and the upper center hole of the device is connected with the force arm hole of the lower lever.
[0004] The existing connecting device cannot adjust the height and direction of the joint, which puts forward high-precision requirements for load processing, 3D numerical model design, processing and assembly of the lever. In the actual operation process, it is found that due to the comprehensive errors such as manufacturing error, load processing error, loading point drawing error and on-site assembly error, the assembly cannot be carried out or the pre-tightening stress exists in the forced assembly, which will lead to inaccurate load application and ultimately affect the test of the test piece. At the same time, it is found that in the connecting process of the levers on both sides of the camber surface, the traditional joint below will jam the lever, limiting the angle between the device and the lever to 0-10°, which cannot effectively adapt to the camber loading. CONTENT OF THE INVENTION
[0005] In order to solve the above problems, the application provides a new type of lever connecting device with adjustable height and adjustable direction and a lever system, which can effectively avoid the pre-tightening stress caused by error accumulation.
[0006] The first aspect of the application provides a new type of lever connecting device with adjustable height and adjustable direction, mainly comprising a fixed base, a single ear joint and a ball head connecting rod, the fixed base is provided with a threaded hole, one end of the single ear joint has a screw rod matched with the threaded hole, the other end of the single ear joint has a ball and socket through hole, the middle part of the ball head connecting rod has a ball head structure, and the ball head connecting rod is connected with the single ear joint at the ball and socket through hole.
[0007] Preferably, the fixed base is a cylindrical structure, and the threaded hole is located at the center of the cylindrical structure.
[0008] Preferably, the fixed base further has a plurality of mounting holes around the threaded hole, which are used for mounting the fixed base on the lever structure.
[0009] Preferably, the ear plate of the single ear joint has a reinforcing flange between the ear plate and the screw rod.
[0010] Preferably, the two ends of the ball joint connecting rod are threaded, and nuts are fitted to connect with another lever structure.
[0011] The second aspect of the present application provides a lever system comprising the new height-adjustable and direction-adjustable lever connecting device, a first lever A, a first lever B and a second lever, the first lever A and the first lever B are respectively connected with the fixed base of one lever connecting device, and the ball joint connecting rods of the two fixed bases are respectively connected with the two ends of the second lever.
[0012] The present application makes the load loading more accurate, simplifies the system design, and improves the assembly efficiency. BRIEF DESCRIPTION OF DRAWINGS
[0013] Figure 1 is a structural schematic diagram of a preferred embodiment of the new height-adjustable and direction-adjustable lever connecting device of the present application.
[0014] Figure 2 is a structural schematic diagram of the lever system of the present application.
[0015] Figure 3 is a schematic diagram of the lever system adjustment of the present application.
[0016] Wherein, 1-fixed base, 2-single ear joint, 21-strengthening flange, 3-ball joint connecting rod, 100-lever connecting device, 200-first lever A, 300-first lever B, 400-second lever. DETAILED DESCRIPTION
[0017] In order to make the purpose, technical scheme and advantages of the present application clearer, the technical scheme of the present application will be described in more detail below in combination with the drawings in the embodiments of the present application. In the drawings, the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The described embodiments are part of the embodiments of the present application, not all of the embodiments. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application. The embodiments of the present application will be described in detail below in combination with the drawings.
[0018] The first aspect of the present application provides a new height-adjustable and direction-adjustable lever connecting device, as Figure 1As shown, it mainly includes a fixed base 1, a single-ear connector 2, and a ball-head connecting rod 3. The fixed base 1 is provided with a threaded hole. One end of the single-ear connector 2 has a screw that matches the threaded hole. The other end of the single-ear connector 2 has a ball socket through hole. The ball-head connecting rod 3 has a ball head structure in the middle, which is connected to the ball head of the single-ear connector 2 at the ball socket through hole.
[0019] This application connects the fixed base 1 to the upper-level lever, and the fixed base 1 and the single-ear connector 2 are threaded together. The GEG12C ball head is installed in the central ball socket through hole of the single-ear connector 2. The two ends of the GEG12C ball head form a connecting rod structure that connects to the lower-level lever, namely the ball head connecting rod 3.
[0020] This application has the advantages of adjustable height, adjustable direction, and adjustable angle. (See reference...) Figure 2 and Figure 3 The height is adjusted by adjusting the depth of the single-ear connector 2 in the fixed base 1 to accommodate different lever-lever connection heights. The direction is adjusted by adjusting the orientation of the single-ear connector 2 in the fixed base 1 to accommodate different lever-lever connection directions; the adjustable direction range is 0° to 180°. The load application angle is adjusted by adjusting the angle between the single-ear connector 2 and the lever. Figure 3 The angle between the vertical plane of the paper and the angle between the two sides is adjusted by using lever-lever connections with different curved surfaces to avoid the jamming problem of traditional joints. The angle is adjustable from 45° to 90°.
[0021] In some alternative embodiments, the fixing base 1 is a cylindrical structure, and the threaded hole is located at the center of the cylindrical structure. In this embodiment, both the center of the fixing base 1 and the lower end of the single-ear connector are M16 threads, and are connected by threaded connection.
[0022] In some alternative embodiments, the fixed base 1 also has a plurality of mounting holes surrounding the threaded hole for mounting the fixed base 1 onto the lever structure. In this embodiment, the fixed base 1 is typically connected to the center of gravity of the lever arm on the upper surface of the upper stage lever by bolts.
[0023] In some alternative embodiments, the single-ear connector 2 has a reinforcing flange 21 between the ear plate and the screw. This embodiment is used to improve the strength of the single-ear connector 2.
[0024] In some alternative embodiments, the ball joint 3 has threads at both ends, which are adapted to be fitted with nuts for connection to another lever structure.
[0025] The second aspect of this application provides a lever system, such as Figure 2 and Figure 3As shown, including the new height-adjustable adjustable direction of the lever connection device 100, as described above, the first lever A 200, the first lever B 300 and the second lever 400, the first lever A 200 and the first lever B 300 are connected to the fixed base 1 of the lever connection device 100 respectively, and the ball head connecting rod 3 of the two fixed bases 1 is connected to the two ends of the second lever 400 respectively.
[0026] Reference Figure 3 , on a curved surface structure, the load is applied from top to bottom. The lever connection device 100 is used on the first lever A 200, and another lever connection device 100 is used on the second lever B 300. Rotate the two lever connection devices 100 to the same plane and assemble them to the force arm center hole position of the second lever 400 respectively. The height of the two lever connection devices 100 can be adjusted to adapt the second lever 400 to the higher level assembly.
[0027] The principle of the lever system is described as follows:
[0028] a) The direction of the force applied on both sides is to apply load obliquely downward along the lever connection device 100;
[0029] b) The fixed base part of the two lever connection devices 100 is fixed on the first lever A 200 and the first lever B 300 respectively through bolts;
[0030] c) The single ear joint of the lever connection device 100 is fixed through threads and fixed base;
[0031] d) When the distance of the connection device is the smallest, that is, L1 and L2 respectively, the length of the force arm is L3 and L4;
[0032] e) When the lever force arm is changed to L3' and L4', the height of the lever connection device 100 can be adjusted to adapt to the assembly;
[0033] f) Only change the installation height, the load application direction remains unchanged.
[0034] g) The installation height of the connection device is adjustable. The installation direction ranges from 0° to 180°. The installation angle ranges from 45° to 90°. The installation height, installation direction and installation angle can be adjusted to adapt to the lever assembly of different curved surfaces.
[0035] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited to this. Any changes or replacements that can be easily thought of by those skilled in the art within the technical scope disclosed in the present application should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.
Claims
1. A new height adjustable and direction adjustable lever connection device, characterized in that, The device comprises a fixed base (1), a single ear joint (2) and a ball head connecting rod (3), the fixed base (1) is provided with a threaded hole, one end of the single ear joint (2) is provided with a screw rod matched with the threaded hole, the other end of the single ear joint (2) is provided with a ball hole through hole, and the middle of the ball head connecting rod (3) is provided with a ball head structure and is connected with the single ear joint (2) at the ball hole through hole.
2. The new height adjustable, direction adjustable lever connection device of claim 1, wherein, The fixed base (1) is a cylindrical structure, and the threaded hole is located at the center of the cylindrical structure.
3. The new height adjustable, direction adjustable lever connection device of claim 2, wherein, The fixed base (1) is also provided with a plurality of mounting holes around the threaded hole, which is used for mounting the fixed base (1) on a lever structure.
4. The new height adjustable, direction adjustable lever connection device of claim 1, wherein, The single ear joint (2) is provided with a reinforcing flange (21) between the ear plate and the screw rod.
5. The new height adjustable, direction adjustable lever connection device of claim 1, wherein, The ball head connecting rod (3) is provided with a screw thread at both ends, and is adapted to be provided with a nut for connecting with another lever structure.
6. A lever system characterized in that, The device comprises a new type of height-adjustable and direction-adjustable lever connecting device (100) according to any one of claims 1-5, a primary lever A (200), a primary lever B (300) and a secondary lever (400), the primary lever A (200) and the primary lever B (300) are respectively connected with the fixed base (1) of one lever connecting device (100), and the ball head connecting rod (3) of the two fixed bases (1) is respectively connected at both ends of the secondary lever (400).