An adaptive push-pull force testing machine fixture structure

Abstract

The utility model belongs to LED lamp area production technical field, and disclose a kind of self-adapting push-pull force testing machine fixture structure, including chassis, horizontal angle adjusting assembly is installed on the chassis, the top of horizontal angle adjusting assembly is connected with inclination angle adjusting assembly, the top of inclination angle adjusting assembly is connected with clamping assembly, the position of outer side on the chassis is provided with air curtain assembly, horizontal angle adjusting assembly realizes the stepless rotation adjustment of test platform 360 °, cooperate inclination angle adjusting assembly, can accurately control inclination angle, both collaborative construction horizontal rotation and multi-dimensional angle control system of tilting swing, can simulate LED chip actual application in installation inclination, vibration torsion and other complex stress posture, air curtain assembly can generate annular uniform airflow barrier, airflow vertical covers LED chip test area, effectively intercepts external dust drift, avoids dust interference force value acquisition, guarantees test accuracy.

Description

Technical Field

[0001] This utility model belongs to the field of LED light strip production technology, specifically an adaptive push-pull force testing machine fixture structure. Background Technology

[0002] LED light strips are linear lighting products that integrate an array of LED beads onto a flexible / rigid substrate, along with wires, an encapsulation layer (waterproof / protective), and adhesive (optional). They are widely used in decorative lighting, home lighting, industrial signage, and other scenarios. Their core structure includes light-emitting units (LED beads), circuit carriers (substrate), connection nodes (solder joints / wires), and a protective layer. They are flexible, have low power consumption, and uniform light efficiency, but they must withstand mechanical and environmental challenges such as installation bending, vibration, and temperature and humidity changes.

[0003] The reliability of LED light strip connections is the core of quality: the soldering points between the LED chips and the substrate, the connections between the wires and terminals, the adhesion between the encapsulant and the substrate, and the adhesiveness between the backing adhesive and the mounting surface are all prone to poor soldering, detachment, and sealing failure due to process deviations (such as insufficient solder or incomplete curing of the adhesive layer). The push-pull force test simulates the mechanical forces such as pulling and peeling in actual use, quantifies the ultimate bearing capacity of the above connection parts, and intercepts weak connection defects in advance (such as LED chip detachment causing local non-lighting, and backing adhesive loss causing the light strip to fall), ensuring product life and safety.

[0004] The push-pull force testing machine uses force sensors and displacement monitoring to quantitatively assess the connection strength of LED strips. The fixture is the core carrier for test execution and needs to consider fixation accuracy, angle adjustment, and environmental protection. Existing fixtures have key shortcomings: most traditional fixtures only support fixed angle testing, making it difficult to adapt to the diverse force scenarios in actual applications. The limitation of angle adjustment leads to a single test scenario, which cannot cover the verification needs of complex working conditions and reduces the comprehensiveness of product reliability assessment. Due to the precision structure of LED chips, the intrusion of environmental dust during testing can cause multiple risks, and existing fixtures lack corresponding protective structures.

[0005] Therefore, an adaptive push-pull force testing machine fixture structure is proposed to address the above problems. Utility Model Content

[0006] To address the problems mentioned in the background art, this utility model provides an adaptive push-pull force testing machine fixture structure, which has the advantages of precise coordinated adjustment of horizontal and tilt angles, efficient dust prevention and core protection by an annular airflow barrier, and improved test authenticity.

[0007] To achieve the above objectives, this utility model provides the following technical solution: an adaptive push-pull force testing machine fixture structure, including a base frame, a horizontal angle adjustment component installed on the base frame, a tilt angle adjustment component connected to the top of the horizontal angle adjustment component, a clamping component connected to the top of the tilt angle adjustment component, and an air curtain component provided on the outer side of the base frame.

[0008] Preferably, the base frame includes a supporting base plate, and supporting feet are fixedly connected to the four corners of the bottom of the supporting base plate, with fixing holes provided on the supporting feet.

[0009] Preferably, the horizontal angle adjustment assembly includes a first motor installed at the center of the bottom of the support base plate, the output end of the first motor is connected to a rotating rod, and the top end of the rotating rod passes through the support base plate and is fixedly connected to a horizontal angle adjustment plate.

[0010] Preferably, the tilt angle adjustment assembly includes two symmetrically arranged fixed plates fixed to the top of the horizontal angle adjustment plate, with a tilt angle adjustment plate disposed between the fixed plates. One side of the tilt angle adjustment plate is connected to the corresponding fixed plate via a connecting bearing, and a rotating rod is fixedly connected to the other side of the tilt angle adjustment plate. The end of the rotating rod away from the tilt angle adjustment plate passes through the corresponding fixed plate and is fixedly connected to a driven gear. The driven gear meshes with a driving gear, and the driving gear is connected to a second motor via a motor shaft. The second motor is disposed on the corresponding fixed plate.

[0011] Preferably, the clamping assembly includes a fixed base fixed to the top of the tilt angle adjustment plate, a fixed stepped clamping block fixed to one side of the top of the fixed base, a groove opened on the top of the fixed base, a lead screw disposed in the groove, a threaded moving block threadedly connected to the lead screw, one end of the lead screw passing through the fixed base and connected to a third motor, guide rods disposed on both sides of the lead screw, a guide moving block passing through the guide rod, and a movable stepped clamping block fixedly connected to the top of both the threaded moving block and the guide moving block, the positional structure of the movable stepped clamping block corresponding to the positional structure of the fixed stepped clamping block.

[0012] Preferably, protective pads are provided on the clamping surfaces of both the fixed stepped clamping block and the movable stepped clamping block.

[0013] Preferably, the air curtain assembly includes a square frame-shaped pipe located at the top edge of the supporting base plate, a narrow slit-shaped air outlet at the top of the square frame-shaped pipe, an air guide pipe connected to one side of the square frame-shaped pipe, an air pump connected to the end of the air guide pipe, and the air pump installed at the bottom of the supporting base plate.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] 1. The horizontal angle adjustment component of this utility model realizes 360° stepless rotation adjustment of the test platform. Combined with the tilt angle adjustment component, the tilt angle can be precisely controlled. The two work together to build a multi-dimensional angle control system of horizontal rotation and tilt swing, which can simulate the complex force postures such as installation tilt, vibration and torsion in the actual application of LED chips, and greatly improve the authenticity of mechanical performance testing.

[0016] 2. The square-shaped pipe and narrow-slit air outlet design of the air curtain assembly of this utility model can generate a ring-shaped uniform airflow barrier. The airflow vertically covers the LED chip test area, effectively intercepting external dust, avoiding dust interference with force value acquisition, ensuring test accuracy, and building a long-lasting clean test environment, which is suitable for the stringent test requirements of LED chips for surface cleanliness. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the horizontal angle adjustment component of this utility model;

[0019] Figure 3 This is a schematic diagram of the tilt angle adjustment component of this utility model;

[0020] Figure 4 This is a schematic diagram of the clamping assembly of this utility model;

[0021] Figure 5 This is a schematic diagram of the structure of the air curtain assembly of this utility model.

[0022] In the diagram: 1. Base frame; 11. Support base plate; 12. Support legs; 13. Fixing holes;

[0023] 2. Horizontal angle adjustment assembly; 21. First motor; 22. Rotating rod; 23. Horizontal angle adjustment plate;

[0024] 3. Tilt angle adjustment assembly; 31. Fixing plate; 32. Tilt angle adjustment plate; 33. Connecting bearing; 34. Rotating rod; 35. Driven gear; 36. Driving gear; 37. Second motor;

[0025] 4. Clamping assembly; 41. Fixed base; 42. Fixed stepped clamping block; 43. Groove; 44. Lead screw; 45. Threaded moving block; 46. Third motor; 47. Guide rod; 48. Guide moving block; 49. Movable stepped clamping block; 410. Protective pad;

[0026] 5. Air curtain assembly; 51. Square frame duct; 52. Narrow slit air outlet; 53. Air guide duct; 54. Air pump. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. 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.

[0028] like Figures 1 to 5 As shown, this utility model provides an adaptive push-pull force testing machine fixture structure, including a base frame 1. A horizontal angle adjustment component 2 is installed on the base frame 1. The horizontal angle adjustment component 2 is used to flexibly adjust the horizontal orientation of the test piece. A tilt angle adjustment component 3 is connected to the top of the horizontal angle adjustment component 2. The tilt angle adjustment component 3 can cooperate with the horizontal adjustment to realize multi-dimensional angle testing. A clamping component 4 is connected to the top of the tilt angle adjustment component 3. The clamping component 4 is used to stably clamp test pieces of different specifications. An air curtain component 5 is set on the outer side of the base frame 1. The air curtain component 5 is used to create a dustproof environment and protect the test piece.

[0029] Specifically, the base frame 1 includes a support base plate 11, and support feet 12 are fixedly connected to the four corners of the bottom of the support base plate 11. The support feet 12 are provided with fixing holes 13. The support feet 12 can be rigidly connected to the worktable of the push-pull force testing machine through the fixing holes 13 to avoid the overall displacement of the fixture during the test, and to provide a stable reference for angle adjustment and clamping test. At the same time, the support base plate 11 can provide a flat mounting surface for each component to ensure the assembly accuracy of the structure.

[0030] Furthermore, the horizontal angle adjustment component 2 includes a first motor 21 installed at the center of the bottom of the support base plate 11. The output end of the first motor 21 is connected to a rotating rod 22. The top end of the rotating rod 22 passes through the support base plate 11 and is fixedly connected to a horizontal angle adjustment plate 23. The first motor 21 can drive the rotating rod 22 to drive the horizontal angle adjustment plate 23 to achieve 360° stepless rotation, which can simulate the force scenarios of LED chips, light strips and other test pieces in different horizontal positions, such as circumferential shear force and lateral tensile force, thereby solving the problem of the limitation of the horizontal angle adjustment of traditional fixtures and improving the coverage of test conditions.

[0031] Furthermore, the tilt angle adjustment assembly 3 includes two symmetrically arranged fixed plates 31 fixed to the top of the horizontal angle adjustment plate 23, with a tilt angle adjustment plate 32 positioned between the fixed plates 31. One side of the tilt angle adjustment plate 32 is connected to the corresponding fixed plate 31 via a connecting bearing 33, and a rotating rod 34 is fixedly connected to the other side of the tilt angle adjustment plate 32. A driven gear 35 is fixedly connected to the side of the rotating rod 34 away from the tilt angle adjustment plate 32, passing through the corresponding fixed plate 31. The driven gear 35 meshes with a driving gear 36, which is electrically connected to the driving gear 36. The machine shaft is connected to a second motor 37, which is mounted on a corresponding fixed plate 31. The second motor 37 is driven by the meshing of the driving gear 36 and the driven gear 35, and can precisely control the tilt amplitude of the tilt angle adjustment plate 32. The tilt angle adjustment component 3, together with the horizontal angle adjustment component 2, can construct a multi-dimensional angle control system of "horizontal rotation + tilt swing", which can reproduce the stress state of the test piece under tilted installation, bending and other working conditions, such as the tilted adhesion force of LED encapsulation glue and the oblique shear force of solder joints, thereby ensuring the consistency between test data and actual application scenarios.

[0032] It is worth noting that the clamping assembly 4 includes a fixed base 41 fixed to the top of the tilt angle adjustment plate 32. A fixed stepped clamping block 42 is fixed to one side of the top of the fixed base 41. A groove 43 is provided on the top of the fixed base 41, and a lead screw 44 is provided in the groove 43. A threaded moving block 45 is threadedly connected to the lead screw 44. One end of the lead screw 44 passes through the fixed base 41 and is connected to a third motor 46. Guide rods 47 are provided on both sides of the lead screw 44. Guide moving blocks 48 pass through the guide rods 47. The threaded moving blocks 45 and guide moving blocks 48 are connected to the guide moving blocks 46. Each movable block 48 has a fixedly connected movable stepped clamping block 49 on its top. The position structure of the movable stepped clamping block 49 corresponds to the position structure of the fixed stepped clamping block 42. When the third motor 46 drives the lead screw 44 to rotate, it can drive the threaded moving block 45 and the guide moving block 48 to move synchronously, thereby adjusting the distance between the movable stepped clamping block 49 and the fixed stepped clamping block 42. This distance adjustment capability can adapt to LED substrates, light strips and other test pieces of different widths, without the need for frequent fixture changes, greatly improving test efficiency.

[0033] It is worth noting that protective pads 410 are provided on the clamping surfaces of both the fixed stepped clamping block 42 and the movable stepped clamping block 49. The protective pads 410 are made of flexible silicone material, which can prevent the rigid clamping surface from directly contacting the LED beads and solder pads, prevent scratching the surface of the beads or crushing the precision solder pads, reduce the scrap rate of the test pieces, and at the same time increase the friction of the clamping surface, prevent the test pieces from slipping during the test, and improve the clamping stability.

[0034] It is worth mentioning that the air curtain assembly 5 includes a square frame-shaped pipe 51 located at the top edge of the support base plate 11. The top of the square frame-shaped pipe 51 is provided with a narrow slit-shaped air outlet 52. One side of the square frame-shaped pipe 51 is connected to an air guide pipe 53, and the end of the air guide pipe 53 is connected to an air pump 54. The air pump 54 is installed at the bottom of the support base plate 11. The high-pressure airflow generated by the air pump 54 is transported to the square frame-shaped pipe 51 through the air guide pipe 53, and then forms a ring-shaped uniform airflow barrier through the narrow slit-shaped air outlet 52. This airflow barrier can block external dust and metal debris from falling onto the surface of test components such as LED chips, avoiding dust interference with force value acquisition. For example, it can prevent particle jamming from causing false judgment of poor soldering and avoid affecting the accuracy of solder joint tensile test, thereby ensuring the accuracy of test data.

[0035] Among them, the first motor 21, the second motor 37, the third motor 46, and the air pump 54 are existing technologies and will not be described in detail; at the same time, this utility model also includes a power supply, a controller, and a switch, which are not the main technical points of this patent and will not be described in detail.

[0036] Working principle and process: First, the base frame 1 is rigidly fixed to the push-pull force testing machine workbench through the fixing holes 13 on the support foot 12. The support base plate 11 provides a flat installation reference for each component. Then, the air pump 54 is started, and the high-pressure airflow is delivered to the square frame pipe 51 through the air guide pipe 53. Then, a ring-shaped uniform airflow barrier is formed through the narrow slit air outlet 52 to prevent dust from entering the test area. Next, the test pieces such as LED chips, substrates or light strips are placed between the fixed stepped clamping block 42 and the movable stepped clamping block 49 of the clamping component 4. The third motor 46 is started to drive the lead screw 44 to rotate, which drives the threaded moving block 45 and the guide moving block 48 to move synchronously along the guide rod 47. The movable stepped clamping block 49 is brought closer to the fixed stepped clamping block 42 until the protective pad 410 is tightly attached to the test piece, thus fixing the test piece. Then, according to the test requirements, the first motor 21 is started to drive the rotating rod 22 to rotate the horizontal angle adjustment plate 23, realizing 360° horizontal orientation adjustment of the test piece. At the same time, the second motor 37 is started to drive the rotating rod 34 and the tilt angle adjustment plate 32 to rotate around the connecting bearing 33 through the meshing transmission of the driving gear 36 and the driven gear 35, so as to accurately adjust the tilt angle of the test piece and make the test force direction consistent with the simulated working condition. After the angle is adjusted to the right position, the push-pull force testing machine applies a preset tension or push force to complete the test piece connection strength test.

[0037] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0038] 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. An adaptive push-pull force testing machine fixture structure, comprising a base frame (1), characterized in that: A horizontal angle adjustment component (2) is installed on the base frame (1). A tilt angle adjustment component (3) is connected to the top of the horizontal angle adjustment component (2). A clamping component (4) is connected to the top of the tilt angle adjustment component (3). An air curtain component (5) is provided on the outer side of the base frame (1).

2. The adaptive push-pull force testing machine fixture structure according to claim 1, characterized in that: The base frame (1) includes a support base plate (11), and support feet (12) are fixedly connected to the four corners of the bottom of the support base plate (11). Fixing holes (13) are provided on the support feet (12).

3. The adaptive push-pull force testing machine fixture structure according to claim 2, characterized in that: The horizontal angle adjustment assembly (2) includes a first motor (21) installed at the center of the bottom of the support base plate (11). The output end of the first motor (21) is connected to a rotating rod (22). The top end of the rotating rod (22) passes through the support base plate (11) and is fixedly connected to a horizontal angle adjustment plate (23).

4. The adaptive push-pull force testing machine fixture structure according to claim 3, characterized in that: The tilt angle adjustment assembly (3) includes two symmetrically arranged fixed plates (31) fixed on the top of the horizontal angle adjustment plate (23). A tilt angle adjustment plate (32) is arranged between the fixed plates (31). One side of the tilt angle adjustment plate (32) is connected to the corresponding fixed plate (31) through a connecting bearing (33). A rotating rod (34) is fixedly connected to the other side of the tilt angle adjustment plate (32). A driven gear (35) is fixedly connected to the end of the rotating rod (34) away from the tilt angle adjustment plate (32) through the corresponding fixed plate (31). The driven gear (35) is meshed with a driving gear (36). The driving gear (36) is connected to a second motor (37) through a motor shaft. The second motor (37) is located on the corresponding fixed plate (31).

5. The adaptive push-pull force testing machine fixture structure according to claim 4, characterized in that: The clamping assembly (4) includes a fixed base (41) fixed to the top of the tilt angle adjustment plate (32). A fixed stepped clamping block (42) is fixed on one side of the top of the fixed base (41). A groove (43) is provided on the top of the fixed base (41). A lead screw (44) is provided in the groove (43). A threaded moving block (45) is threaded to the lead screw (44). One end of the lead screw (44) passes through the fixed base (41) and is connected to a third motor (46). Guide rods (47) are provided on both sides of the lead screw (44). A guide moving block (48) passes through the guide rods (47). A movable stepped clamping block (49) is fixedly connected to the top of both the threaded moving block (45) and the guide moving block (48). The position structure of the movable stepped clamping block (49) corresponds to the position structure of the fixed stepped clamping block (42).

6. The adaptive push-pull force testing machine fixture structure according to claim 5, characterized in that: Protective pads (410) are provided on the clamping surfaces of both the fixed stepped clamping block (42) and the movable stepped clamping block (49).

7. The adaptive push-pull force testing machine fixture structure according to claim 2, characterized in that: The air curtain assembly (5) includes a square frame-shaped pipe (51) located at the top edge of the support base plate (11). The top of the square frame-shaped pipe (51) is provided with a narrow slit-shaped air outlet (52). One side of the square frame-shaped pipe (51) is connected to an air guide pipe (53). The end of the air guide pipe (53) is connected to an air pump (54). The air pump (54) is installed at the bottom of the support base plate (11).

Images