Furniture static load fatigue testing device
By combining horizontal and vertical electric slide rails with dual cylinders, the problem of the single loading method in furniture fatigue testing equipment is solved, realizing the realistic simulation of furniture under complex loads and improving the comprehensiveness and accuracy of the test.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SGS-CSTC STANDARDS TECH SERVICES (TIANJIN) CO LTD
- Filing Date
- 2025-04-25
- Publication Date
- 2026-05-05
AI Technical Summary
Existing furniture fatigue testing equipment has a single loading method, which cannot fully simulate the complex loads that furniture undergoes in actual use. Furthermore, it lacks operational flexibility and has a limited scope of application.
It adopts a combination design of horizontal and vertical electric slide rails and dual cylinders to achieve composite loading in the vertical direction and at any angle of 15-75°. Combined with adjustable clamping unit and multi-angle cylinders, it can precisely control the loading position and angle.
It enables realistic simulation of furniture under complex loads, improves the comprehensiveness and accuracy of testing, and provides a reliable basis for quality assessment.
Smart Images
Figure CN224202718U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of furniture testing. More specifically, this utility model relates to a furniture static load fatigue testing device. Background Technology
[0002] As people's living standards continue to improve, higher demands are being placed on the quality and durability of furniture. During daily use, furniture is subjected to loads of various directions and sizes. For example, chairs are subjected to the pressure of the human body, and tables are subjected to the weight of placed items and external impacts. Therefore, static load fatigue testing of furniture is an important step in ensuring its quality and safety.
[0003] Currently, existing fatigue testing equipment has some significant limitations. On the one hand, some testing equipment uses a relatively simple loading method, simulating only loads in a single direction and failing to comprehensively simulate the complex loads experienced by furniture in actual use. For example, some testing equipment can only apply pressure vertically downwards, making it difficult to simulate the working state of furniture under lateral thrust or oblique pressure. This results in test results that do not accurately reflect the actual performance of the furniture and cannot provide a comprehensive and reliable basis for furniture quality assessment. On the other hand, existing testing equipment lacks flexibility in adjustment and operation. The loading position and angle of some equipment are difficult to adjust, making it impossible to flexibly set according to different types and specifications of furniture, greatly limiting the applicability of the equipment. Therefore, it is necessary to design a technical solution that can overcome these shortcomings to a certain extent. Utility Model Content
[0004] One objective of this invention is to provide a static load fatigue testing device for furniture, which can improve the comprehensiveness of static load fatigue testing.
[0005] To achieve these objectives and other advantages of this utility model, according to one aspect of this utility model, a furniture static load fatigue testing device is provided, comprising a frame and a horizontal frame; the bottom of the frame is provided with four height-adjustable columns, the tops of which are connected to the horizontal frame via flanges; a transverse electric slide rail is mounted on the horizontal frame, the sliding direction of which is parallel to the long side of the horizontal frame, and a longitudinal electric slide rail is mounted on the transverse electric slide rail, the sliding direction of which is perpendicular to the sliding direction of the transverse electric slide rail; a first cylinder assembly is suspended below the longitudinal electric slide rail, the piston rod axis of the first cylinder assembly being perpendicular to the plane of the horizontal frame; a pair of symmetrical lateral mounting plates are provided on both sides of the horizontal frame, the lateral mounting plates being connected to a second cylinder via hinges, the piston rod axis of the second cylinder forming an adjustable angle of 15-75° with the plane of the horizontal frame.
[0006] Furthermore, the first cylinder group includes four pneumatic cylinders connected in parallel, and the piston rod ends of the four pneumatic cylinders are connected to the loading plate via ball joints.
[0007] Furthermore, it also includes: a fan-shaped angle plate, which is fixedly mounted on the side mounting plate and spaced apart from the second cylinder; the edge of the fan-shaped angle plate is provided with first positioning holes arranged in an arc at 5° intervals, and the central angle of the first positioning holes covers a range of 15° to 75°; a fixed seat with internal threads is welded to the side mounting plate, and an adjusting screw with a handle is screwed into the fixed seat; the end of the adjusting screw is connected to the cylinder body of the second cylinder through a universal joint to adjust the angle of the second cylinder; the cylinder body of the second cylinder is also provided with a second positioning hole, which is used to lock the angle of the second cylinder by setting positioning pins in the first positioning hole and the second positioning hole.
[0008] Furthermore, the frame also includes a base, on which parallel rails are arranged on both sides. Two sets of clamping units are symmetrically installed on each rail. Each set of clamping units includes a slide, a bidirectional lead screw, and two clamping arms. The bidirectional lead screw passes horizontally through the slide, and its two ends are respectively formed with a forward thread section and a reverse thread section. The two clamping arms are connected to the forward thread section or the reverse thread section through a nut seat. One end of the bidirectional lead screw extends to the outside of the slide and is connected to a handwheel.
[0009] Furthermore, the clamping arm of one set of clamping units is a rigid metal arm with an adjustable V-shaped guide block at the front end for fixing the corner of the furniture. The bidirectional lead screw of the clamping unit adopts a coarse thread for quick coarse adjustment. The clamping arm of the other clamping unit includes an internal carbon fiber skeleton and an external elastic rubber layer. The bidirectional lead screw of the clamping unit adopts a fine thread for fine adjustment.
[0010] Furthermore, the track has a T-shaped cross-section, and the bottom of the slide block is provided with a groove that matches the T-shape, with locking bolts installed on the sidewall of the groove.
[0011] According to another aspect of this utility model, a furniture static load fatigue testing device is also provided, including a frame, a horizontal frame, and a base; the bottom of the frame is provided with four height-adjustable columns, the tops of which are connected to the horizontal frame via flanges; a transverse electric slide rail is installed on the horizontal frame, the sliding direction of which is parallel to the long side of the horizontal frame, and a longitudinal electric slide rail is installed on the transverse electric slide rail, the sliding direction of which is perpendicular to the sliding direction of the transverse electric slide rail; a first cylinder group is suspended below the longitudinal electric slide rail, the piston rod axis of the first cylinder group is perpendicular to the plane of the horizontal frame, the first cylinder group includes four parallel pneumatic cylinders, the piston rod ends of the four pneumatic cylinders are connected to a loading plate via ball joints; a pair of symmetrical lateral mounting plates are provided on both sides of the horizontal frame, the lateral mounting plates are connected to a second cylinder via hinges, and a fan-shaped angle plate is provided on the lateral mounting plate, the fan-shaped angle plate being spaced apart from the second cylinder. The edge of the shaped angle plate is provided with first positioning holes arranged in an arc at 5° intervals, and the central angle of the first positioning holes covers a range of 15° to 75°; a fixed seat with internal threads is welded on the side mounting plate, and an adjusting screw with a handle is screwed into the fixed seat. The end of the adjusting screw is connected to the cylinder body of the second cylinder through a universal joint to adjust the angle of the second cylinder; the cylinder body of the second cylinder is also provided with a second positioning hole, which is used to lock the angle of the second cylinder by setting positioning pins in the first positioning hole and the second positioning hole; parallel rails are arranged on both sides of the base, and two sets of clamping units are symmetrically installed on each rail. Each set of clamping units includes a slide, a double-acting screw, and two clamping arms. The double-acting screw passes horizontally through the slide, and the two ends of the double-acting screw are respectively formed with a forward thread section and a reverse thread section. The two clamping arms are connected to the forward thread section or the reverse thread section through a nut seat, and one end of the double-acting screw extends to the outside of the slide and is connected to a handwheel.
[0012] Furthermore, the clamping arm of one set of clamping units is a rigid metal arm with an adjustable V-shaped guide block at the front end for fixing the corner of the furniture. The bidirectional lead screw of the clamping unit adopts a coarse thread for quick coarse adjustment. The clamping arm of the other clamping unit includes an internal carbon fiber skeleton and an external elastic rubber layer. The bidirectional lead screw of the clamping unit adopts a fine thread for fine adjustment.
[0013] Furthermore, the track has a T-shaped cross-section, and the bottom of the slide block is provided with a groove that matches the T-shape, with locking bolts installed on the sidewall of the groove.
[0014] This utility model has at least the following beneficial effects:
[0015] This invention utilizes horizontal and vertical electric slide rails to precisely control the position of the first cylinder group, improving the accuracy of the loading position. The combination design of horizontal / vertical electric slide rails and dual cylinder groups enables composite loading in the vertical direction (first cylinder group) and at any angle of 15-75° (second cylinder), breaking through the limitation of traditional equipment that can only load vertically. It realistically simulates the complex loads (such as oblique pressure, lateral thrust, etc.) that furniture is subjected to during use, greatly improving the comprehensiveness of the test.
[0016] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the structure of one embodiment of the present utility model;
[0018] Figure 2 This is a schematic diagram of the structure of the second cylinder in one embodiment of the present invention;
[0019] Figure 3 This is a schematic diagram of the structure of a sector-shaped angle plate according to an embodiment of the present invention;
[0020] Figure 4 This is a schematic diagram of the clamping unit according to one embodiment of the present invention. Detailed Implementation
[0021] The present invention will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description.
[0022] It should be understood that terms such as "having," "comprising," and "including" used in the embodiments of this application do not exclude the presence or addition of one or more other elements or combinations thereof. All directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of components in a specific posture. If the specific posture changes, the directional indication will also change accordingly. When an element is referred to as "fixed to" or "set on" another element, it can be directly on the other element or may have an intervening element present. When an element is referred to as "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element through an intervening element. Descriptions involving "first," "second," etc., in the embodiments of this application are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features.
[0023] It should be noted that the technical solutions of the various embodiments of this application can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this application.
[0024] like Figure 1 As shown, the furniture static fatigue testing device of this application embodiment includes a frame 1 and a horizontal frame 102. The height of the four uprights 101 at the bottom of the frame 1 is adjustable. The height adjustment range of the uprights 101 can be set according to actual needs, for example, it can be adjusted within a certain range, such as 0.5 meters to 1.5 meters. The specific value can be determined according to the height requirements of the furniture test. For example, when testing taller furniture, the height of the uprights 101 can be adjusted to 1.2 meters. The base 103 of the frame 1 can be made of metal, such as common steel, to ensure sufficient strength and stability. The top of the uprights 101 is connected to the horizontal frame 102 through a flange. The flange can be made of steel, and the connection method adopts conventional methods such as bolt connection.
[0025] A transverse electric slide rail 2 is mounted on the horizontal frame 102, and the sliding direction of the transverse electric slide rail 2 is parallel to the long side of the horizontal frame 102. The transverse electric slide rail 2 can be a commercially available linear electric slide rail, and its sliding accuracy and load-bearing capacity can be selected according to the requirements of the testing device. A longitudinal electric slide rail 3 is mounted on the transverse electric slide rail 2, and the sliding direction of the longitudinal electric slide rail 3 is perpendicular to the sliding direction of the transverse electric slide rail 2. The longitudinal electric slide rail 3 can also be a commercially available linear electric slide rail product. A first cylinder group 4 is suspended below the longitudinal electric slide rail 3, and the piston rod axis of the first cylinder group 4 is perpendicular to the plane of the horizontal frame 102. The first cylinder group 4 can include four parallel pneumatic cylinders, and the pneumatic cylinders can be selected from suitable specifications. The piston rod ends of the four pneumatic cylinders are connected to a loading plate 5 through ball joints. The loading plate 5 can be made of metal, such as aluminum alloy. A pair of lateral mounting plates 7 are symmetrically provided on both sides of the horizontal frame 102. The lateral mounting plates 7 can be metal plates, such as steel plates. The side mounting plate 7 is connected to the second cylinder 6 via a hinge. The piston rod axis of the second cylinder 6 forms an adjustable angle of 15-75° with the plane of the horizontal frame 102.
[0026] In operation, firstly, adjust the height of the four uprights 101 at the bottom of the frame 1 according to the height of the furniture to be tested, so that the horizontal frame 102 is at a suitable height position. Height adjustment is achieved by adjusting the adjustment structure on the uprights 101. Then, place the furniture to be tested within the track 10 area of the base 103 of the frame 1 and secure it. Next, according to the testing requirements, precisely adjust the position of the first cylinder group 4 using the transverse electric slide rail 2 and the longitudinal electric slide rail 3, so that the loading plate 5 is in a suitable loading position. Then, according to the required loading angle, adjust the angle of the second cylinder 6 using the adjusting screw 8 and the positioning pin, so that it is at a suitable angle between 15-75°. Then, start the first cylinder group 4 and the second cylinder 6 to apply loads in the vertical direction and the set angle direction to the furniture respectively, and conduct a static load fatigue test. During the test, relevant data, such as the loaded pressure value and loading time, can be recorded.
[0027] As can be seen, this embodiment can achieve composite loading in the vertical direction and at any angle of 15-75° by combining the horizontal / vertical electric slide rail 3 with the dual cylinder group, which improves the accuracy of the loading position and breaks through the limitation of traditional equipment that can only load vertically. It can more realistically simulate the complex loads (such as oblique pressure, lateral thrust, etc.) that furniture is subjected to during use, thereby improving the comprehensiveness of static load fatigue testing of furniture and making the test results more reflective of the actual performance of the furniture.
[0028] In another embodiment, the first cylinder group 4 comprises four parallel pneumatic cylinders. These four pneumatic cylinders can be commercially available products with certain specifications and performance, such as those capable of withstanding corresponding pressures and exhibiting good stability. Parallel arrangement of the four pneumatic cylinders ensures the uniformity of the loading force while providing a larger loading force. Because of the parallel structure, the cylinders can work collaboratively. When applying a vertical load to the furniture during static fatigue testing, each cylinder shares a portion of the force. Therefore, even if a slight performance difference exists in one cylinder, it will not significantly affect the overall loading effect, thereby improving the stability and reliability of the test. The piston rods of the four cylinders are connected to the loading plate 5 via ball joints. The ball joints can be made of a suitable metal material, providing good rotational flexibility. Connecting the loading plate 5 via ball joints allows the loading plate 5 to adaptively adjust its angle according to the actual surface of the furniture when loaded vertically. For example, when there is some unevenness on the furniture surface, the loading plate 5 can better fit the furniture surface through the rotation of the ball joint, ensuring that the loading force can be applied evenly to the furniture. This avoids the situation where the local force is too large or too small due to poor contact between the loading plate 5 and the furniture surface, thus more accurately simulating the state of vertical pressure that the furniture bears in actual use, and further improving the accuracy and reliability of the static load fatigue test results.
[0029] like Figure 2-3 As shown, in another embodiment, the furniture static load fatigue testing device also includes a sector-shaped angle plate 9. The sector-shaped angle plate 9 can be made of metal, such as steel with high hardness and good wear resistance, to ensure its stability and reliability during long-term use. The sector-shaped angle plate 9 is fixedly installed on the lateral mounting plate 7, which can also be made of metal sheet. The two are installed using a strong connection method such as welding to ensure that there is no relative displacement between the sector-shaped angle plate 9 and the lateral mounting plate 7. The sector-shaped angle plate 9 is spaced apart from the second cylinder 6, providing space for subsequent adjustment and positioning of the angle of the second cylinder 6.
[0030] The edge of the fan-shaped angle plate 9 is provided with first positioning holes 901 arranged in an arc at 5° intervals, and the central angle of these first positioning holes 901 covers a range of 15° to 75°. This arrangement allows the angle adjustment of the second cylinder 6 to be performed within a relatively wide and precise range. Specifically, the 5° interval can meet the needs of loading tests at different angles in most cases, without making the angle adjustment too coarse, nor increasing the difficulty and complexity of adjustment due to too small an interval.
[0031] A threaded mounting base is welded onto the side mounting plate 7. The mounting base can also be made of metal, and the precision and strength of its threads must meet the requirements for screwing in and fixing the adjusting screw 8. The adjusting screw 8 with a handle is screwed into the mounting base. The handle design allows the operator to manually rotate the adjusting screw 8, making the adjustment process more convenient. The end of the adjusting screw 8 is connected to the cylinder body of the second cylinder 6 via a universal joint. The universal joint can be a component with good rotation performance and connection strength, ensuring that the adjusting screw 8 can rotate flexibly and change angles when adjusting the angle of the second cylinder 6, while also firmly connecting the adjusting screw 8 and the cylinder body of the second cylinder 6 to transmit the adjusting force.
[0032] When the angle of the second cylinder 6 needs to be adjusted, the operator holds the handle of the adjusting screw 8 and rotates it. Due to the threaded engagement between the adjusting screw 8 and the fixed seat, the adjusting screw 8 will move axially, which in turn drives the cylinder body of the second cylinder 6 to rotate through the universal joint, causing the angle between the piston rod axis of the second cylinder 6 and the plane of the horizontal frame 102 to change. When the second cylinder 6 rotates to the required angle, the second positioning hole 901 on the cylinder body of the second cylinder 6 will align with the corresponding first positioning hole 901 on the sector angle plate 9. The operator can lock the angle of the second cylinder 6 by setting a positioning pin in the aligned first and second positioning holes 901. The positioning pin can be a cylindrical metal pin with a diameter that matches the positioning hole 901, thus maintaining a fixed angle for the second cylinder 6 during testing and stably applying a load of the corresponding angle to the furniture.
[0033] like Figure 4 As shown, in another embodiment, the frame 1 also includes a base 103, which may be made of a metal material with high strength and good stability, such as cast iron or steel, to ensure that it can withstand the weight of the furniture and various loads applied during the test throughout the entire test process, and maintain the stability of the device.
[0034] The base 103 has parallel rails 10 on both sides, and two sets of clamping units are symmetrically installed on each rail 10. Each set of clamping units includes a slide 11, a double-acting screw 12, and two clamping arms 14. The slide 11 can be made of metal, and its hardness and wear resistance can meet the requirements of long-term use. The double-acting screw 12 passes horizontally through the slide 11, and the two ends of the double-acting screw 12 are respectively formed with a forward thread section and a reverse thread section. The double-acting screw 12 can be made of high-quality alloy steel to ensure that it has sufficient strength and precision and can stably transmit power during rotation.
[0035] The two clamping arms 14 are connected to the forward or reverse threaded section via nut seats. The nut seats and the double-acting screw 12 have high thread fit accuracy, which can ensure that the clamping arms 14 can move accurately along the axial direction of the screw when the double-acting screw 12 rotates. One end of the double-acting screw 12 extends to the outside of the slide block 11 and is connected to a handwheel 13. The design of the handwheel 13 is convenient for manual operation by the operator. Its surface can be provided with anti-slip texture to increase the friction when the operator holds it, making the rotation easier and more stable.
[0036] When it is necessary to fix the furniture to be tested, firstly, according to the size and shape of the furniture, slide the slide 11 along the track 10 to a suitable position, and then fix the slide 11 to the track 10 by the locking bolts on the side wall of the groove at the bottom of the slide 11. Next, the operator turns the handwheel 13, which drives the double-acting screw 12 to rotate. Due to the action of the forward and reverse threaded sections at both ends of the double-acting screw 12, the two clamping arms 14 will move simultaneously to the middle or to both sides, achieving initial fixation of the furniture corners. Meanwhile, the clamping arm 14 of the other clamping unit will make close contact with other parts of the furniture, and fix the furniture more precisely. In this embodiment, by setting a clamping unit on the track 10 of the base 103, and using the double-acting screw 12 and clamping arms 14, it is possible to flexibly fix furniture of different types and specifications, which improves the adaptability of the testing device to different furniture, making the device applicable to static load fatigue testing of various types of furniture.
[0037] In another embodiment, the clamping arms 14 of one set of clamping units are rigid metal arms. These rigid metal arms can be made of high-hardness, high-strength metal materials, such as alloy steel, to ensure sufficient support and stability when fixing furniture. The front end of the rigid metal arm has an adjustable V-shaped guide block 15, which can be flexibly adjusted according to the specific shape and size of the furniture corner. The V-shaped guide block 15 can be installed at the front end of the rigid metal arm via bolts or other connections and is equipped with multiple adjustment holes for fine-tuning of angle and position as needed. The bidirectional lead screw 12 of this clamping unit uses a coarse thread with a large pitch. When the bidirectional lead screw 12 is rotated, the nut seat moves relatively quickly on the lead screw, thus enabling rapid coarse adjustment.
[0038] When furniture needs to be secured, the operator first moves the clamping unit with rigid metal arms to the appropriate position on the track 10 via the slide 11, based on the location of the furniture's corner. Then, the operator rotates the handwheel 13 of the bidirectional lead screw 12 of the clamping unit. Due to the coarse thread, the rigid metal arms quickly move towards the furniture corner, causing the V-shaped guide block 15 to gradually approach and engage the corner, thus achieving initial positioning and securing of the furniture. This rapid coarse adjustment method can roughly fix the furniture in the appropriate position in a short time, improving preparation efficiency before testing.
[0039] The clamping arm 14 of the other clamping unit includes an internal carbon fiber skeleton and an external elastic rubber layer. The internal carbon fiber skeleton is characterized by high strength and lightweight, providing good structural support for the clamping arm 14. The external elastic rubber layer has a certain degree of elasticity and flexibility, which can effectively cushion and protect the furniture surface when in contact with it, avoiding damage to the furniture. The bidirectional lead screw 12 of this clamping unit uses a fine thread. The pitch of the fine thread is small. When rotating the bidirectional lead screw 12, the nut seat moves slowly on the lead screw, but the movement accuracy is high, thus realizing the function of fine adjustment.
[0040] After the rigid metal arm has initially secured the furniture, the operator continues to rotate the handwheel 13 with the fine-threaded bidirectional lead screw 12, causing the clamping arm 14, with its carbon fiber frame and elastic rubber layer, to slowly move towards the furniture surface. Due to the elasticity of the rubber layer, the clamping arm 14 can fit tightly against the furniture surface. Furthermore, with the fine-tuning rotation of the bidirectional lead screw 12, the contact pressure between the clamping arm 14 and the furniture surface can be further adjusted, ensuring the furniture is firmly fixed to the testing device. This fine-tuning method ensures the furniture remains stable during testing, preventing insecure fixation from affecting the accuracy of the test results.
[0041] In another embodiment, the track 10 is designed with a T-shaped cross section. The T-shaped track 10 can be made of high-strength steel. The bottom of the slide 11 is provided with a matching groove, which fits well. In use, the slide 11 is slid along the track 10 to a suitable position and the locking bolts on the side wall of the groove are tightened to fix it. This design can prevent the slide 11 from shifting, ensure the stability of the clamping unit, improve the reliability of furniture fixing, and thus improve the accuracy of static load fatigue test results.
[0042] Embodiments of this application further provide a furniture static load fatigue testing device, which consists of a frame 1, a horizontal frame 102, and a base 103.
[0043] The four uprights 101 at the bottom of the frame 1 are height-adjustable and made of high-strength steel to ensure stability and durability. Adjusting the height of the uprights 101 accommodates testing furniture of varying heights. The tops of the uprights 101 are connected to the horizontal frame 102 via flanges, ensuring a secure connection.
[0044] A transverse electric slide rail 2 is installed on the horizontal frame 102. This slide rail can be a high-precision linear electric slide rail, and its sliding direction is parallel to the long side of the horizontal frame 102. A longitudinal electric slide rail 3 is installed on the transverse electric slide rail 2. The two are perpendicular to each other and together realize precise movement on the plane. The first cylinder group 4 is suspended below the longitudinal electric slide rail 3. It contains four parallel pneumatic cylinders. These pneumatic cylinders work together to provide a stable and large vertical loading force. The piston rod end of the pneumatic cylinder is connected to the loading plate 5 through a ball joint. The ball joint design allows the loading plate 5 to adaptively adjust the angle according to the surface of the furniture to ensure that the load in the vertical direction is applied evenly.
[0045] The symmetrically arranged lateral mounting plates 7 on both sides of the horizontal frame 102 are connected to the second cylinder 6 via hinges, enabling multi-angle loading. The fan-shaped angle plates 9 on the lateral mounting plates 7 have first positioning holes 901 arranged in an arc at 5° intervals, ranging from 15° to 75°. The angle of the second cylinder 6 is adjusted by an adjusting screw 8 with a handle and a universal joint, and then locked using a positioning pin, accurately simulating the force applied to furniture at different angles.
[0046] The T-shaped rails 10 arranged parallel on both sides of the base 103 provide a stable sliding track 10 for the slide 11. The groove at the bottom of the slide 11 matches the T-shaped rail 10, and the locking bolts on the side wall of the groove can fix the position of the slide 11. Two sets of clamping units are symmetrically installed on each rail 10. One set of clamping arms 14 is a rigid metal arm, and the adjustable V-shaped guide block 15 at the front end cooperates with the coarse thread bidirectional screw 12 to quickly and coarsely adjust and fix the corner of the furniture. The other set of clamping arms 14 consists of an internal carbon fiber skeleton and an external elastic rubber layer. The fine thread bidirectional screw 12 enables fine adjustment, which can not only firmly fix the furniture, but also protect the surface of the furniture.
[0047] In use, first adjust the height of the upright 101, place the furniture, and fix it with the clamping unit. Then, use the horizontal and vertical electric slide rails 3 to adjust the position of the first cylinder group 4, adjust the angle of the second cylinder 6 according to the test requirements and lock it, start the first cylinder group 4 and the second cylinder 6, and apply vertical and different angle loads to the furniture for testing;
[0048] The device has significant technical advantages. Through the coordinated work of multiple components, it can achieve composite loading in the vertical direction and at any angle from 15° to 75°, breaking through the limitation of traditional equipment that can only load vertically. It can more comprehensively and realistically simulate the complex loads that furniture is subjected to in actual use, greatly improving the comprehensiveness and accuracy of the test and providing a reliable basis for furniture quality assessment.
[0049] The number of devices and processing capacity described herein are for the purpose of simplifying the description of this utility model. Applications, modifications, and variations of the furniture static fatigue testing device of this utility model will be readily apparent to those skilled in the art.
[0050] Although the embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for this utility model. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and the illustrations shown and described herein.
Claims
1. A furniture static load fatigue testing device, characterized in that, Includes racks and horizontal frames; The bottom of the frame is provided with four height-adjustable columns, and the top of the columns are connected to the horizontal frame via flanges. A transverse electric slide rail is installed on the horizontal frame. The sliding direction of the transverse electric slide rail is parallel to the long side of the horizontal frame. A longitudinal electric slide rail is installed on the transverse electric slide rail. The sliding direction of the longitudinal electric slide rail is perpendicular to the sliding direction of the transverse electric slide rail. The first cylinder assembly is suspended below the longitudinal electric slide rail, and the piston rod axis of the first cylinder assembly is perpendicular to the horizontal frame plane. A pair of lateral mounting plates are symmetrically arranged on both sides of the horizontal frame. The lateral mounting plates are connected to the second cylinder through hinges. The piston rod axis of the second cylinder forms an adjustable angle of 15-75° with the plane of the horizontal frame.
2. The furniture static load fatigue testing device as described in claim 1, characterized in that, The first cylinder group includes four pneumatic cylinders connected in parallel, and the piston rods of the four pneumatic cylinders are connected to the loading plate by ball joints.
3. The furniture static load fatigue testing device as described in claim 1, characterized in that, Also includes: A fan-shaped angle plate is fixedly mounted on the side mounting plate and spaced apart from the second cylinder. The edge of the fan-shaped angle plate has first positioning holes arranged in an arc at 5° intervals, and the central angle of the first positioning holes covers a range of 15° to 75°. A fixed seat with internal threads is welded to the side mounting plate. An adjusting screw with a handle is screwed into the fixed seat. The end of the adjusting screw is connected to the cylinder body of the second cylinder through a universal joint to adjust the angle of the second cylinder. The cylinder body of the second cylinder is also provided with a second positioning hole, which is used to lock the angle of the second cylinder by setting positioning pins in the first positioning hole and the second positioning hole.
4. The furniture static load fatigue testing device as described in claim 1, characterized in that, The frame also includes a base, on which rails are arranged parallel to each other, and two sets of clamping units are symmetrically installed on each rail. Each clamping unit includes a slide, a bidirectional lead screw, and two clamping arms. The bidirectional lead screw passes horizontally through the slide, and both ends of the bidirectional lead screw have a forward thread section and a reverse thread section respectively. The two clamping arms are connected to the forward thread section or the reverse thread section respectively through a nut seat. One end of the bidirectional lead screw extends to the outside of the slide and is connected to a handwheel.
5. The furniture static load fatigue testing device as described in claim 4, characterized in that, One set of clamping units has a rigid metal clamping arm with an adjustable V-shaped guide block at the front end for fixing furniture corners. The bidirectional lead screw of the clamping unit uses a coarse thread to achieve rapid coarse adjustment. The clamping arm of another clamping unit includes an internal carbon fiber skeleton and an external elastic rubber layer. The bidirectional lead screw of the clamping unit has a fine thread for fine adjustment.
6. The furniture static load fatigue testing device as described in claim 4, characterized in that, The track has a T-shaped cross-section, and the bottom of the slide block has a groove that matches the T-shape. Locking bolts are installed on the sidewalls of the groove.
7. A furniture static load fatigue testing device, characterized in that, Includes rack, horizontal frame, and base; The bottom of the frame is provided with four height-adjustable columns, and the top of the columns are connected to the horizontal frame via flanges. A transverse electric slide rail is installed on the horizontal frame. The sliding direction of the transverse electric slide rail is parallel to the long side of the horizontal frame. A longitudinal electric slide rail is installed on the transverse electric slide rail. The sliding direction of the longitudinal electric slide rail is perpendicular to the sliding direction of the transverse electric slide rail. The first cylinder group is suspended below the longitudinal electric slide rail. The piston rod axis of the first cylinder group is perpendicular to the horizontal frame plane. The first cylinder group includes four pneumatic cylinders connected in parallel. The piston rod ends of the four pneumatic cylinders are connected to the loading pressure plate through ball joints. A pair of symmetrical lateral mounting plates are provided on both sides of the horizontal frame. The lateral mounting plates are connected to the second cylinder via hinges. A fan-shaped angle plate is provided on the lateral mounting plate, which is spaced apart from the second cylinder. The edge of the fan-shaped angle plate has first positioning holes arranged in an arc at 5° intervals, and the central angle of the first positioning holes covers a range of 15° to 75°. A fixed seat with internal threads is welded to the lateral mounting plate. An adjusting screw with a handle is screwed into the fixed seat. The end of the adjusting screw is connected to the cylinder body of the second cylinder through a universal joint to adjust the angle of the second cylinder. The cylinder body of the second cylinder is also provided with a second positioning hole, which is used to lock the angle of the second cylinder by setting positioning pins in the first positioning hole and the second positioning hole. The base has parallel tracks on both sides, and two sets of clamping units are symmetrically installed on each track. Each set of clamping units includes a slide, a bidirectional lead screw, and two clamping arms. The bidirectional lead screw passes horizontally through the slide, and the two ends of the bidirectional lead screw are respectively formed with a forward thread section and a reverse thread section. The two clamping arms are connected to the forward thread section or the reverse thread section through a nut seat. One end of the bidirectional lead screw extends to the outside of the slide and is connected to a handwheel.
8. The furniture static load fatigue testing device as described in claim 7, characterized in that, One set of clamping units has a rigid metal clamping arm with an adjustable V-shaped guide block at the front end for fixing furniture corners. The bidirectional lead screw of the clamping unit uses a coarse thread to achieve rapid coarse adjustment. The clamping arm of another clamping unit includes an internal carbon fiber skeleton and an external elastic rubber layer. The bidirectional lead screw of the clamping unit has a fine thread for fine adjustment.
9. The furniture static load fatigue testing device as described in claim 7, characterized in that, The track has a T-shaped cross-section, and the bottom of the slide block has a groove that matches the T-shape. Locking bolts are installed on the sidewalls of the groove.