A high-precision hydraulic damping device performance detection equipment

Abstract

The application relates to the field of detection equipment, in particular to a high-precision hydraulic damping device performance detection equipment which comprises a machine body and a mounting box fixedly installed on the machine body; a multidimensional detection mechanism arranged on the mounting box, wherein the multidimensional detection mechanism comprises a bearing assembly used for bearing a fixed damper to be detected; a planetary assembly and a wave-shaped assembly, the planetary assembly is used for driving the bearing assembly to revolve around the center of the mounting box while rotating, the bearing assembly moves along the track of the wave-shaped assembly during revolution, and the bearing assembly performs up-down reciprocating motion, so that the bearing assembly forms multidimensional motion of revolution, revolution and reciprocating motion; and a fixing mechanism arranged on the mounting box and connected with the bearing assembly; the bearing assembly is driven to synchronously rotate and revolve by the planetary assembly, and the bearing assembly is driven by the wave-shaped assembly to realize synchronous axial reciprocating motion, so that the dynamic working condition of synchronous coupling of revolution, rotation and axial expansion during actual service of the damper can be simulated.

Description

Technical Field

[0001] The present invention relates to the field of detection equipment, especially a high-precision performance detection equipment for hydraulic damping devices. Background Art

[0002] Currently, the general performance detection equipment for hydraulic dampers in the industry mainly takes the form of a single-axis reciprocating test bench. Its core consists of a servo drive unit, a force and displacement detection module, and a fixed tooling, and can complete the axial fixed-frequency and fixed-stroke tensile and compression cycle tests of the damper. Some advanced equipment has added a single-degree-of-freedom angular swing mechanism to simulate the static deflection condition of the damper. However, there are still certain defects in the existing detection equipment in the actual working scenarios of mass production quality inspection and full-condition performance verification of dampers: First, taking the hydraulic damper supporting the construction machinery slewing platform as an example, in its actual operation, it not only needs to complete 360° continuous revolution with the slewing platform, but also generates self-rotation around its own axis due to the adjustment of the platform attitude. At the same time, it is accompanied by the axial reciprocating telescoping brought by the working load, which is a typical multi-dimensional dynamic coupling condition. However, the existing single-axis detection equipment can only achieve pure axial load loading, and even the equipment with a swing function can only achieve single-degree-of-freedom static deflection, and cannot simulate the dynamic conditions of revolution, self-rotation, and axial reciprocating synchronization coupling. As a result, there are certain deviations between the core data such as damping force, internal leakage, and fatigue life obtained from the detection and the performance of the product in actual use, which may lead to problems such as performance attenuation, seal failure, and structural damage of the product that passes the detection within a short time after being installed. Summary of the Invention

[0003] In view of the problem in the above or the existing technology that the dynamic conditions of revolution, self-rotation, and axial reciprocating synchronization coupling cannot be simulated, the present invention is proposed.

[0004] Therefore, the purpose of the present invention is to provide a high-precision performance detection equipment for hydraulic damping devices.

[0005] To solve the above technical problems, the present invention provides the following technical solutions: A high-precision performance detection equipment for hydraulic damping devices, including, A machine body and an installation box fixedly installed on the machine body; A multi-dimensional detection mechanism arranged on the installation box, and the multi-dimensional detection mechanism includes, A bearing component for bearing and fixing the damper to be tested; A planetary component and a waveform component. The planetary component is used to drive the bearing component to revolve around the center of the installation box while rotating, and during the revolution of the bearing component, it will move along the trajectory of the waveform component and perform up-and-down reciprocating motion, so that the bearing component forms multi-dimensional actions of rotation, revolution, and reciprocating motion; A fixing mechanism disposed on the mounting box and connected to the carrier component, the fixing mechanism comprising, A hinge assembly, used to hinge and fix the fixed section and the telescopic section of the damper under test; A follower component is used to synchronously drive the hinge component to move as the carrier component revolves.

[0006] As a preferred embodiment of the high-precision hydraulic damping device performance testing equipment of the present invention, wherein: the planetary assembly includes a plurality of planetary gears, and the bearing assembly is configured in multiple sets corresponding to the planetary gears.

[0007] As a preferred embodiment of the high-precision hydraulic damping device performance testing equipment of the present invention, the bearing assembly includes a spring telescopic rod fixedly installed at the center of the planetary gear, the telescopic end of the spring telescopic rod slidingly passes through the mounting box and is fixedly installed on a bearing platform, the bearing platform being used to support the damper to be tested.

[0008] As a preferred embodiment of the high-precision hydraulic damping device performance testing equipment of the present invention, the planetary assembly further includes a main gear rotatably mounted on the machine body and meshing with the planetary gears, and a plurality of planetary gears are distributed around the main gear at equal angles.

[0009] As a preferred embodiment of the high-precision hydraulic damping device performance testing equipment of the present invention, wherein: a gear frame is fixedly sleeved on the outside of the gear shaft of the main gear, the planetary gear is rotatably mounted on the gear frame, and an internal meshing gear ring that meshes with the planetary gear is fixedly installed on the inner wall of the mounting box.

[0010] As a preferred embodiment of the high-precision hydraulic damping device performance testing equipment of the present invention, the waveform component includes an annular cam disk fixedly mounted on the main gear, an annular groove is provided on the outer side of the bearing platform, a slider is slidably mounted in the annular groove, and an L-shaped rod that abuts against the annular cam disk is fixedly mounted on the slider.

[0011] As a preferred embodiment of the high-precision hydraulic damping device performance testing equipment of the present invention, the hinge assembly includes an annular slide rail fixedly installed on the upper edge of the mounting box and concentrically arranged with the mounting box, and a plurality of sliders corresponding to the bearing platform are slidably installed on the annular slide rail.

[0012] As a preferred embodiment of the high-precision hydraulic damping device performance testing equipment of the present invention, wherein: a guide column is fixedly installed on the second slider, and a connecting ring is installed at the end of several guide columns.

[0013] As a preferred embodiment of the high-precision hydraulic damping device performance testing equipment of the present invention, wherein: an installation plate is fixedly installed on the outer side of the guide column, an upper hinge seat is rotatably installed on the side of the installation plate near the bearing platform, and a lower hinge seat is fixedly installed on the surface of the bearing platform.

[0014] As a preferred embodiment of the high-precision hydraulic damping device performance testing equipment of the present invention, the following component includes a slider three rotatably installed in an annular groove, and a connecting frame fixedly connected to the slider three is slidably installed on the outside of the guide column.

[0015] The beneficial effects of the high-precision hydraulic damping device performance testing equipment of the present invention are as follows: In this application, a planetary assembly drives the load-bearing assembly to synchronously complete its rotation and revolution. This, combined with a waveform assembly driving the load-bearing assembly to achieve synchronous axial reciprocating motion, simulates the dynamic working conditions of synchronous coupling of revolution, rotation, and axial extension during the actual service of the damper. This ensures the testing process closely matches the actual usage scenario of the hydraulic damper, effectively avoiding the problem of discrepancies between test data and the actual service performance of the damper. This provides reliable test data support for the performance verification and quality control of the damper. Furthermore, by using a single drive source in conjunction with a planetary gear train structure to synchronously drive multiple sets of load-bearing assemblies, simultaneous testing of multiple dampers under the same working conditions can be achieved. This not only significantly improves the efficiency of batch testing but also ensures complete consistency of multi-station testing conditions, providing a unified testing benchmark for evaluating the quality consistency of products in the same batch. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0018] Figure 2 This is a three-dimensional structural diagram of the multi-dimensional detection mechanism and fixing mechanism of the present invention.

[0019] Figure 3 This is a three-dimensional structural diagram of the spring telescopic rod and the support platform of the present invention.

[0020] Figure 4 This is a three-dimensional structural diagram of the annular slide rail, slider 2, and guide post of the present invention.

[0021] Figure 5 This is a three-dimensional structural diagram of the slider, guide post, and mounting plate of the present invention.

[0022] Figure 6 This is a three-dimensional structural diagram of the main gear, gear carrier, and planetary gear components of the present invention.

[0023] In the diagram: 1. Body; 2. Mounting box; 3. Multi-dimensional detection mechanism; 31. Bearing component; 311. Spring telescopic rod; 312. Bearing platform; 32. Planetary assembly; 321. Main gear; 322. Gear carrier; 323. Planetary gear; 324. Internal meshing gear ring; 33. Waveform assembly; 331. Annular cam disk; 332. Annular slide groove; 333. Slider one; 334. L-shaped rod; 4. Fixing mechanism; 41. Hinge assembly; 411. Annular slide rail; 412. Slider two; 413. Guide column; 414. Mounting plate; 415. Upper hinge seat; 416. Connecting ring; 417. Lower hinge seat; 42. Follower assembly; 421. Slider three; 422. Connecting frame; 5. Damper under test. Detailed Implementation

[0024] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0025] Reference Figures 1-6 This embodiment provides a high-precision hydraulic damping device performance testing equipment, which can simulate the dynamic working conditions of synchronous coupling of revolution, rotation, and axial extension during the actual service of the damper. It includes a body 1 and a mounting box 2 fixedly mounted on the body 1; a multi-dimensional testing mechanism 3 disposed on the mounting box 2, the multi-dimensional testing mechanism 3 including a bearing component 31 for supporting and fixing the damper 5 under test; a planetary component 32 and a waveform component 33, the planetary component 32 driving the bearing component 31 to rotate simultaneously with the damper 5. The bearing component 31 revolves around the center of the mounting box 2. During its revolution, it moves along the trajectory of the waveform component 33, resulting in up-and-down reciprocating motion, which causes the bearing component 31 to form a multi-dimensional action of rotation, revolution, and reciprocating motion. The fixing mechanism 4 is set on the mounting box 2 and connected to the bearing component 31. The fixing mechanism 4 includes a hinge component 41, which is used to hinge and fix the fixed section and the telescopic section of the damper 5 under test; and a follower component 42, which is used to synchronously drive the hinge component 41 to move as the bearing component 31 revolves.

[0026] Reference Figures 2-6The planetary assembly 32 includes a plurality of planetary gears 323, and the bearing assembly 31 is configured in multiple sets corresponding to the planetary gears 323; the bearing assembly 31 includes a spring telescopic rod 311 fixedly installed at the center of the planetary gears 323, the telescopic end of the spring telescopic rod 311 slides through the mounting box 2 and is fixedly installed on a bearing platform 312, the bearing platform 312 being used to support the damper 5 to be tested.

[0027] Reference Figures 2-6 The planetary assembly 32 further includes a main gear 321 rotatably mounted on the body 1 and meshing with the planetary gears 323, and a plurality of planetary gears 323 are distributed circumferentially around the main gear 321 at equal angles.

[0028] Reference Figures 2-6 The gear carrier 322 is fixedly sleeved on the outside of the gear shaft of the main gear 321, and the planetary gear 323 is rotatably mounted on the gear carrier 322. The inner wall of the mounting box 2 is fixedly installed with an internal meshing gear ring 324 that meshes with the planetary gear 323.

[0029] It should be noted that this embodiment adopts a fixed-axis internal meshing planetary gear train structure. The internal meshing gear ring 324 is fixedly connected to the mounting box 2 and remains stationary. The main gear 321 is the active input component and is driven to rotate by an external servo motor. When the main gear 321 rotates, it synchronously drives the gear carrier 322 to rotate around the axis of the main gear 321, which in turn drives the planetary gear 323 to revolve around the main gear 321. At the same time, the planetary gear 323 meshes with the fixed internal meshing gear ring 324 and generates a rotational motion around its own axis while revolving. The speed ratio of rotation to revolution can be adjusted by the gear ratio of the main gear 321, planetary gear 323, and internal meshing gear ring 324 to adapt to the damper test conditions of different application scenarios.

[0030] In addition, multiple sets of planetary gears 323 are distributed circumferentially around the main gear 321 at equal angles, and multiple sets of bearing components 31 are set accordingly, which can realize the synchronous detection of multiple dampers 5 under test, greatly improving the detection efficiency.

[0031] Reference Figures 2-6 The waveform component 33 includes an annular cam disk 331 fixedly mounted on the main gear 321. An annular groove 332 is provided on the outer side of the support platform 312. A slider 333 is slidably mounted in the annular groove 332. An L-shaped rod 334 that abuts against the annular cam disk 331 is fixedly mounted on the slider 333.

[0032] It should be noted that the annular cam disk 331 is an end-face cylindrical cam structure, and its upper end face is a waveform surface with a preset lift. The lift height of the surface matches the test stroke of the damper 5 under test, and the waveform period of the surface matches the revolution period of the planetary gear 323. By replacing the annular cam disk 331 with different lift curves, different test strokes and different extension speeds can be achieved, adapting to the testing standards of dampers of different specifications. The extension end and fixed end of the spring telescopic rod 311 are slidably engaged through a keyway to prevent the extension end of the spring telescopic rod 311 from twisting, ensuring that the spring telescopic rod 311 is always in a stable position. In the compressed pre-tightened state, a continuous downward pre-tightening force is provided to the bearing platform 312, ensuring that the bottom end of the L-shaped rod 334 is always in close contact with the upper end face of the annular cam disk 331 without gaps or jumps. This ensures that the up-and-down reciprocating motion of the bearing platform 312 completely follows the lift curve of the annular cam disk 331, resulting in high motion accuracy and repeatability. At the same time, the slider 333 can slide freely in the annular groove 332. When the bearing platform 312 rotates, the L-shaped rod 334 and the slider 333 remain relatively stationary and do not rotate with the bearing platform 312, completely avoiding interference between the rotational motion and the extension and retraction motion, and ensuring that the two motions are independently controllable.

[0033] In practical use, the quality inspector fixes multiple dampers 5 to be tested at both ends through the hinge assembly 41 and clamps them onto the bearing platform 312 of the corresponding workstation. Then, the quality inspector sets parameters such as test speed and number of cycles, and enters the ready-to-start state. Then, the external servo motor starts according to the preset parameters, driving the main gear 321 to rotate at a constant speed around its own axis. The main gear 321 synchronously drives the gear carrier 322 to rotate at the same speed around the axis of the main gear 321. At the same time, the gear carrier 322 drives multiple planetary gears 323 to revolve around the axis of the main gear 321. During the revolution of the planetary gears 323, they continuously mesh with the internal meshing gear ring 324, generating a rotational motion around their own axis, and finally realizing the coupled rotational motion of the planetary gears 323's revolution and rotation.

[0034] Meanwhile, the rotation and revolution of each planetary gear 323 are synchronously transmitted to the support platform 312 through the spring telescopic rod 311 fixed to its center, causing the support platform 312 to be completely synchronized with the planetary gear 323, and synchronously complete the two-dimensional rotational motion of revolution around the center of the equipment and rotation around its own axis; while the main gear 321 rotates, it drives the annular cam disk 331 to rotate at the same speed as the main gear 321 on a fixed axis; during the rotation, the high and low lift changes of the wave-shaped surface of the upper end of the annular cam disk 331 continuously drive the L-shaped rod 334 to perform axial up and down reciprocating motion; the L-shaped rod 334 transmits the reciprocating motion to the support platform 312 through the slider 333, driving the spring telescopic rod 311 to perform axial extension and contraction, and finally driving the damper under test 5 to complete the continuous tension and compression cycle through the support platform 312, realizing the test loading of the core damping performance of the damper.

[0035] During the rotation of the support platform 312, the slider 333 slides freely in the annular groove 332 on the outer side of the support platform 312, keeping the L-shaped rod 334 and the slider 333 relatively stationary and not rotating with the support platform 312. This completely avoids the motion interference between the rotational motion and the axial extension motion, ensuring that the two dimensions of motion are completely independent and controllable, and that the test loading parameters are without deviation. Through the double rotation of the planetary gear system and the support platform 312 driving the damper under test 5 to complete continuous tension and compression cycles, the three dimensions of the support platform 312—revolution, rotation, and axial reciprocating motion—are performed synchronously and without interference. The support platform 312 drives the damper under test 5 to simultaneously complete multi-dimensional composite motions of revolution around the center of the mounting box 2, rotation around its own axis, and continuous axial reciprocating extension. This simulates the multi-posture rotation and yaw conditions of the damper during actual service, restoring the dynamic posture changes in real use, making the test data more consistent with actual performance, and significantly improving the accuracy and effectiveness of the test results.

[0036] Reference Figures 2-6 The hinge assembly 41 includes an annular slide rail 411 fixedly installed on the upper edge of the mounting box 2 and concentrically arranged with the mounting box 2. Several sliders 412 corresponding to the support platform 312 are slidably installed on the annular slide rail 411.

[0037] Reference Figures 2-6 A guide post 413 is fixedly installed on the slider 412. A connecting ring 416 is installed at the end of several guide posts 413. An installation plate 414 is fixedly installed on the outside of the guide post 413. An upper hinge seat 415 is rotatably installed on the side of the installation plate 414 near the support platform 312. A lower hinge seat 417 is fixedly installed on the surface of the support platform 312.

[0038] Reference Figures 2-6 The follower component 42 includes a slider 421 rotatably mounted in an annular groove 332, and a connecting frame 422 fixedly connected to the slider 421 is slidably mounted on the outside of the guide post 413.

[0039] It should be noted that the core function of the follower component 42 is to achieve complete decoupling of the three-dimensional motion, avoid motion interference, and ensure the coaxiality of both ends of the damper 5 under test throughout the process: Firstly, slider three 421 can slide freely circumferentially within the annular groove 332. When the support platform 312 rotates, slider three 421, connecting frame 422, and guide column 413 remain relatively stationary and do not rotate with the support platform 312. At the same time, slider three 421 and annular groove 332 form a circumferential limiting fit in the revolution direction, with no relative sliding, and can accurately transmit the revolution motion of the support platform 312 in a 1:1 ratio; the revolution trajectory of the annular slide rail 411 and the support platform 312 is a concentric circle, and the sliding trajectory of slider two 412 completely overlaps with the revolution trajectory of the support platform 312. First, the upper and lower hinge seats 417 are kept in circumferential relative position with zero deviation throughout the entire process. Second, the connecting frame 422 and the guide column 413 are axially slidingly fitted. When the bearing platform 312 drives the fixed end of the damper 5 under test to reciprocate up and down, the connecting frame 422 can slide synchronously along the axial direction of the guide column 413, ensuring that the extension end and the fixed end of the damper 5 under test always remain coaxial and without radial offset, while not interfering with the normal progress of the extension and retraction movement. Third, the bottom end of the guide column 413 is fixedly connected to the second slider 412. The second slider 412 can slide circumferentially along the annular slide rail 411. When the bearing platform 312 revolves, the guide column 413 and the second slider 412 can be driven to revolve synchronously along the annular slide rail 411 through the third slider 421 and the connecting frame 422.

[0040] In practical use, before starting the equipment test, the quality inspector needs to complete the clamping of multiple dampers 5 to be tested at the workstation. The quality inspector hinges and fixes the telescopic section of the damper 5 to be tested to the upper hinge seat 415, and the fixed section to the lower hinge seat 417 on the surface of the bearing platform 312, completing the bidirectional hinge positioning at both ends of a single damper. After positioning is completed, the test begins. During the test, the planetary assembly 32 drives the bearing platform 312 to revolve at a uniform speed around the center of the mounting box 2. During the revolution of the bearing platform 312, the outer ring of its outer ring... The slider 421 in the groove 332 synchronously drives the connecting frame 422 to revolve along the same trajectory and at the same speed. The connecting frame 422 is rigidly connected to the guide column 413, which in turn drives the guide column 413 and the slider 412 to slide circumferentially along the annular slide rail 411 in complete synchronization with the bearing platform 312. This ultimately achieves the synchronous revolution of the upper hinge seat 415 and the lower hinge seat 417 without deviation, thereby ensuring that the extension end and the fixed end of the damper revolve completely synchronously and avoiding circumferential misalignment that could cause pulling or bending of the damper.

[0041] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A high-precision hydraulic damping device performance testing equipment, characterized in that: include, The main body (1) and the mounting box (2) fixedly mounted on the main body (1); A multi-dimensional detection mechanism (3) is installed on the mounting box (2), the multi-dimensional detection mechanism (3) includes, The bearing assembly (31) is used to support the fixed damper (5) under test. Planetary component (32) and waveform component (33). The planetary component (32) is used to drive the bearing component (31) to revolve around the center of the mounting box (2) while rotating on its own axis. During the revolve, the bearing component (31) will move along the trajectory of the waveform component (33) and undergo up-and-down reciprocating motion, so that the bearing component (31) forms a multi-dimensional action of rotation, revolution and reciprocating motion. A fixing mechanism (4) is disposed on the mounting box (2) and connected to the support assembly (31), the fixing mechanism (4) comprising, Hinged assembly (41), the hinged assembly (41) is used to hinge and fix the fixed section and the telescopic section of the damper (5) under test; Follower component (42) is used to synchronously drive the hinge component (41) to move as the bearing component (31) revolves.

2. The high-precision hydraulic damping device performance testing equipment as described in claim 1, characterized in that: The planetary assembly (32) includes a plurality of planetary gears (323), and the bearing assembly (31) is configured in multiple sets corresponding to the planetary gears (323).

3. The high-precision hydraulic damping device performance testing equipment as described in claim 2, characterized in that: The bearing assembly (31) includes a spring telescopic rod (311) fixedly installed at the center of the planetary gear (323). The telescopic end of the spring telescopic rod (311) slides through the mounting box (2) and is fixedly installed on a bearing platform (312). The bearing platform (312) is used to support the damper (5) to be tested.

4. The high-precision hydraulic damping device performance testing equipment as described in claim 3, characterized in that: The planetary assembly (32) also includes a main gear (321) rotatably mounted on the body (1) and meshing with the planetary gears (323), and a plurality of planetary gears (323) are distributed circumferentially around the main gear (321) at equal angles.

5. The high-precision hydraulic damping device performance testing equipment as described in claim 4, characterized in that: The gear carrier (322) is fixedly sleeved on the outside of the gear shaft of the main gear (321), and the planetary gear (323) is rotatably mounted on the gear carrier (322). An internal meshing gear ring (324) that meshes with the planetary gear (323) is fixedly installed on the inner wall of the mounting box (2).

6. The high-precision hydraulic damping device performance testing equipment as described in claim 5, characterized in that: The waveform component (33) includes an annular cam disk (331) fixedly mounted on the main gear (321). An annular groove (332) is provided on the outer side of the support platform (312). A slider (333) is slidably mounted in the annular groove (332). An L-shaped rod (334) that abuts against the annular cam disk (331) is fixedly mounted on the slider (333).

7. The high-precision hydraulic damping device performance testing equipment as described in claim 6, characterized in that: The hinge assembly (41) includes an annular slide rail (411) fixedly installed on the upper edge of the mounting box (2) and concentrically arranged with the mounting box (2). Several sliders (412) corresponding to the support platform (312) are slidably installed on the annular slide rail (411).

8. The high-precision hydraulic damping device performance testing equipment as described in claim 7, characterized in that: Guide posts (413) are fixedly installed on the slider two (412), and a connecting ring (416) is installed at the end of several guide posts (413).

9. The high-precision hydraulic damping device performance testing equipment as described in claim 8, characterized in that: An mounting plate (414) is fixedly installed on the outside of the guide post (413). An upper hinge seat (415) is rotatably installed on the side of the mounting plate (414) near the support platform (312). A lower hinge seat (417) is fixedly installed on the surface of the support platform (312).

10. The high-precision hydraulic damping device performance testing equipment as described in claim 9, characterized in that: The follower assembly (42) includes a slider three (421) rotatably mounted in an annular groove (332), and a connecting frame (422) fixedly connected to the slider three (421) is slidably mounted on the outside of the guide post (413).

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