A durability testing device for plywood used in seating

Abstract

This utility model discloses a durability testing device for plywood used in seating, including a base, a gantry frame, a lifting push rod, a counterweight block, a movable slide, and a positioning clamp. The movable slide is slidably connected to a slide groove. The positioning clamp has clamping holes on its side wall for clamping and fixing the plywood. The movable end of the lifting push rod is positioned downwards and connected to the counterweight block via a suspension chain. The counterweight block presses down on the plywood as the lifting push rod moves up and down. This utility model, by providing slide grooves on both sides of the base, along with the slidable movable slide and positioning clamp, allows for flexible adjustment of the plywood's position, facilitating the fixing of plywood of different sizes at the stress point and improving testing accuracy. The lifting push rod drives the counterweight block to move up and down; with the assistance of the suspension chain, the counterweight block presses down using its own weight, making the stress process on the plywood closer to the human sitting pressure state, effectively improving the reliability of the test results.

Description

Technical Field

[0001] This utility model relates to the field of durability testing devices, and in particular to a durability testing device for plywood used in seating. Background Technology

[0002] Seat plywood is a structural material used in seat manufacturing. It is usually made of multiple layers of wood veneer glued and pressed together. It has a certain strength, rigidity and durability, and is an important component affecting seat comfort and structural safety. Because seats are subjected to repeated sitting and lying, impact loads and force impacts from different postures during use, plywood may experience continuous fatigue, local deformation or aging of the glue layer, which poses certain safety hazards. Therefore, durability testing is required when manufacturing seat plywood.

[0003] In the existing technology, commonly used durability testing devices mostly use fixed clamps to clamp plywood in a specific position and apply pressure repeatedly through a loading device to simulate the stress conditions during use, thereby evaluating its durability performance. However, when faced with plywood samples of different specifications and sizes, it is difficult to flexibly adjust its clamping position and stress center, causing the applied pressure to deviate from the predetermined stress position, thus affecting the accuracy of the test results.

[0004] Therefore, existing technologies have shortcomings and need to be improved. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a convenient and effective device for testing the durability of plywood for seats that can improve the accuracy of test results.

[0006] To achieve this objective, the present invention adopts the following technical solution: a durability testing device for plywood used in seating, comprising a base, a gantry frame, a lifting push rod, a counterweight block, a movable slide, and a positioning clamp;

[0007] The machine base is provided with sliding grooves on both sides, and the movable slide is slidably connected to the sliding grooves. The end of the positioning clamp is provided with a threaded shaft, and the threaded shaft is detachably connected to the movable slide by a thread. The side wall of the positioning clamp is provided with clamping holes for clamping and fixing plywood.

[0008] The gantry frame is mounted on the machine base, and the lifting push rod is mounted on the gantry frame. The movable end of the lifting push rod is set downward and is connected to the counterweight block through a suspension chain. The counterweight block is used to press down on the plywood as the lifting push rod moves up and down.

[0009] The above-mentioned technical solution includes a locking bolt and a locking nut in the plywood durability testing device for seats.

[0010] The slide groove has a convex shape, the nut part of the locking bolt is located in the slide groove, and the screw part of the locking bolt passes through the movable slide and is locked to the nut.

[0011] In the above-described technical solution, the plywood durability testing device for seats has a rotating grip on the positioning clamp, which is used for a person to hold and rotate the positioning clamp.

[0012] In the above-mentioned technical solution, the plywood durability testing device for seats has a conical groove inside the positioning clamp, and rubber pads are respectively provided on the upper and lower walls of the conical groove. A clamping hole for clamping and fixing the plywood is formed between the two rubber pads.

[0013] In the above-mentioned technical solution, the plywood durability testing device for seats has a buffer pad layer on the bottom surface of the counterweight block, and the buffer pad layer is made of polyurethane or rubber.

[0014] In the above-mentioned technical solution, the base of the seat plywood durability testing device is provided with supporting foot pads.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] This invention features sliding grooves on both sides of the base, along with a slidable movable slide and positioning clamp, allowing for flexible adjustment of the plywood's position. This facilitates fixing plywood of different sizes at specific stress points, improving the accuracy of test results. The lifting push rod drives the counterweight block to move up and down. With the assistance of the suspension chain, the counterweight block presses down using its own weight, making the stress process on the plywood more closely resemble the pressure state of a human body while sitting, effectively improving the reliability of test results. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] The structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and purposes that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the positioning clamping block installation structure of this utility model. Detailed Implementation

[0021] To make the utility model's objectives, features, and advantages more apparent and understandable, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below 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 skilled in the art without creative effort are within the scope of protection of the present utility model.

[0022] In the description of this utility model, it should be understood that the terms "upper," "lower," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be a component centrally located at the same time.

[0023] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0024] like Figure 1 and Figure 2As shown, this utility model embodiment provides a durability testing device for plywood used in seating, including a base 1, a gantry frame 2, a lifting push rod 3, a counterweight block 4, a movable slide 5, and a positioning clamp 6. The base 1 has sliding grooves 10 on both sides, and the movable slide 5 is slidably connected to the sliding grooves 10. The positioning clamp 6 has a threaded shaft 61 at its end, and the threaded shaft 61 is detachably connected to the movable slide 5 by threads. The positioning clamp 6 has clamping holes 60 on its side wall, which are used to clamp and fix plywood 8. The gantry frame 2 is mounted on the base 1, and the lifting push rod 3 is mounted on the gantry frame 2. The movable end of the lifting push rod 3 is set downward and is connected to the counterweight block 4 through a suspension chain 7. The counterweight block 4 is used to press down on the plywood 8 as the lifting push rod 3 moves up and down. During the test, the sliding grooves 10 on both sides of the base 1 allow the movable slide 5 to be adjusted laterally according to the size of the plywood 8, thereby adjusting the position of the positioning clamp 6. The end of the positioning clamp 6 is detachably connected to the slide via a threaded shaft 61, which facilitates quick replacement or adjustment of the clamp to accommodate plywood 8 of different thicknesses. The side wall of the positioning clamp 6 is provided with clamping holes 60, which can firmly clamp the plywood 8, keeping it in a suspended state to be tested. Subsequently, the lifting push rod 3 moves downward, causing the counterweight block 4 to press down naturally to simulate the sitting pressure state of a human body. The suspension chain 7 ensures that the force is applied only by the weight of the counterweight block 4, which is closer to the instantaneous gravity pressure state when a human body is sitting down, thereby improving the reliability of the test structure and effectively solving the problems of non-adjustable force position and force offset in traditional test devices.

[0025] Furthermore, it also includes a locking bolt 11 and a locking nut 12. The slide groove 10 has a convex structure. The nut part of the locking bolt 11 is located in the slide groove 10. The screw part of the locking bolt 11 passes through the movable slide 5 and is locked to the nut. This arrangement makes it easy to move and adjust the position of the movable slide 5 by tightening or loosening the locking nut 12, thereby quickly adapting to plywood 8 of different specifications and ensuring that the force application point of the counterweight block 4 is aligned with the force testing area of ​​the plywood 8.

[0026] Furthermore, the positioning clamp 6 is provided with a rotating handle 62, which is used for a person to hold and rotate the positioning clamp 6. This arrangement makes it convenient for the operator to adjust the tightness of the positioning clamp 6 by holding the rotating handle 62 when changing the plywood sample 8, without the need for other tools, thus effectively improving the clamping efficiency of the positioning clamp 6.

[0027] Furthermore, the positioning clamping block 6 has a conical groove 61 inside, and rubber pads 62 are respectively provided on the upper and lower walls of the conical groove 61. A clamping hole 60 for clamping and fixing the plywood 8 is formed between the two rubber pads 62. The rubber pads 62 have good elasticity and friction properties, and can provide reliable clamping force without damaging the surface of the plywood 8, effectively preventing the plywood 8 from loosening during the test.

[0028] Furthermore, the bottom surface of the counterweight block 4 is provided with a buffer pad 41, which is made of polyurethane or rubber. This design can prevent indentations from being made on the surface of the plywood 8 during the test.

[0029] Furthermore, the base 1 is provided with a support foot pad 100 at the bottom. The support foot pad 100 can improve the overall stability and prevent shaking during the test.

[0030] The above-described embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A durability testing device for plywood used in seating, characterized in that, Includes base, gantry frame, lifting push rod, counterweight block, movable slide and positioning clamp; The machine base is provided with sliding grooves on both sides, and the movable slide is slidably connected to the sliding grooves. The end of the positioning clamp is provided with a threaded shaft, and the threaded shaft is detachably connected to the movable slide by a thread. The side wall of the positioning clamp is provided with clamping holes for clamping and fixing plywood. The gantry frame is mounted on the machine base, and the lifting push rod is mounted on the gantry frame. The movable end of the lifting push rod is set downward and is connected to the counterweight block through a suspension chain. The counterweight block is used to press down on the plywood as the lifting push rod moves up and down.

2. The durability testing device for plywood used in seating according to claim 1, characterized in that, It also includes locking bolts and locking nuts; The slide groove has a convex shape, the nut part of the locking bolt is located in the slide groove, and the screw part of the locking bolt passes through the movable slide and is locked to the nut.

3. The durability testing device for plywood used in seating according to claim 1, characterized in that, The positioning clamp is provided with a rotating grip, which is used by a person to hold and rotate the positioning clamp.

4. The durability testing device for plywood used in seating according to claim 1, characterized in that, The positioning clamp has a conical groove inside, and rubber pads are respectively provided on the upper and lower walls of the conical groove. A clamping hole for clamping and fixing the plywood is formed between the two rubber pads.

5. The durability testing device for plywood used in seating according to claim 1, characterized in that, The bottom surface of the counterweight block is provided with a buffer pad layer, which is made of polyurethane or rubber.

6. The durability testing device for plywood used in seating according to claim 1, characterized in that, The base is equipped with support feet.

Images