A tensile testing apparatus for carbon fibre products

Abstract

This utility model relates to the field of tensile strength testing technology for carbon fiber products, specifically a tensile strength testing device for carbon fiber products. It includes a body, a support mounted on the surface of the body, a movable frame slidably connected to the inner wall of the support, a movable seat and a base fixedly connected to the surface of the body respectively, and clamping components on both the movable seat and the base. A screw is rotatably connected to the inner wall of the support, and the screw is threadedly connected to the inner wall of the movable seat. A motor is installed on the inner wall of the body. This utility model, by setting an auxiliary device and controlling the components to pull two sliding blocks in a slide rail, allows the protective plates to quickly merge, forming a closed protective space with the support. This effectively reduces the flying debris that may occur when the carbon fiber spokes break, lowering the risk of operators being cut by the debris. Simultaneously, the positioning unit can lock the sliding block position after the protective plates merge, eliminating the need for continuous operation of the control components, and the reset unit can control the sliding blocks to reset.

Description

Technical Field

[0001] This utility model relates to the field of tensile testing technology for carbon fiber products, and in particular to a device for testing the tensile strength of carbon fiber products. Background Technology

[0002] Carbon fiber spokes are wheel spoke components made of carbon fiber composite materials. Their core function is to connect the hub and rim, transmit torque, and withstand the tension and pressure when the wheel rotates. They are the key load-bearing components of carbon fiber wheels. Compared with traditional metal spokes (such as steel and aluminum alloy), their advantages are "lightweight + high strength". They weigh only 1 / 4 of steel spokes of the same strength, which can further reduce the rotational inertia of the wheelset and improve riding acceleration and climbing efficiency. At the same time, carbon fiber has excellent fatigue resistance and is not prone to deformation and corrosion like metal spokes under long-term stress.

[0003] In the current spoke production process, tensile testing devices are used to test the tensile performance of the spokes. However, the existing tensile testing devices lack effective protective devices during use. During the tensile test, the carbon fiber spokes are subjected to gradually increasing tensile force. When the tensile force exceeds its breaking strength, it will instantly undergo brittle fracture. At the moment of fracture, not only will sharp carbon fiber fragments be generated, but the stress release at the time of fracture will also cause the fragments to fly in all directions at high speed, which can easily cut the hands, face and other exposed parts of the operator. Utility Model Content

[0004] The purpose of this invention is to solve the problem in the existing technology that when the tensile force exceeds the breaking strength, brittle fracture will occur instantaneously. At the moment of fracture, not only will sharp carbon fiber fragments be generated, but the stress release at the time of fracture will also cause the fragments to fly in all directions at a high speed, which can easily scratch the hands, face and other exposed parts of the operator. Therefore, a tensile strength testing device for carbon fiber products is proposed.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a tensile strength testing device for carbon fiber products, comprising a body, a bracket mounted on the surface of the body, a movable frame slidably connected to the inner wall of the bracket, a movable seat and a base fixedly connected to the surface of the movable frame and the body respectively, clamping components being provided on the movable seat and the base, a screw rotatably connected to the inner wall of the bracket, the screw being threadedly connected to the inner wall of the movable seat, a motor being provided on the inner wall of the body for driving the screw to rotate, and a protective device being provided on the surface of the bracket;

[0006] The protective device includes slide rails fixed to the two sides of a bracket. Slide seats are slidably connected to the surfaces of the slide rails, and two protective plates are fixedly connected to the surfaces of the slide seats. A control component is provided on the surface of the bracket to control the movement of the two slide seats, allowing the protective plates to merge for protection. A reset part is provided on the surface of the bracket to control the slide seats and protective plates to reset. A positioning part is provided on the surface of the slide seats for positioning them. During testing, the control component moves the two slide seats along the slide rails, causing the two slide seats to merge with the protective plates, thus providing shielding on both sides and achieving protection. Simultaneously, the positioning part positions the slide seats after the protective plates have merged.

[0007] Preferably, the control component includes a winding motor installed in the inner wall of the bracket. The output end of the winding motor is fixedly connected to a winding wheel. Two sets of steel wire ropes are wound and fixedly connected to the surface of the winding wheel. The other ends of the two sets of steel wire ropes are fixedly connected to the surfaces of two slides respectively. When the above components are used for control, the winding motor is turned on, the winding motor drives the winding wheel to rotate, the winding wheel winds up the two sets of steel wire ropes respectively, and the steel wire ropes drive the slides to move on the slide rail.

[0008] Preferably, the positioning part includes a cylinder fixed on the surface of the slide, and the output end of the cylinder is fixedly connected to an insert shaft, which passes through the slide. The surface of the bracket is provided with a positioning hole, and the insert shaft is inserted into the inner wall of the positioning hole. Through the above components, the cylinder drives the insert shaft to move, and the insert shaft can be inserted into the positioning hole, which can realize the positioning of the slide and reduce the burden on the winding motor.

[0009] Preferably, the reset part includes two guide rods fixed on the surface of the bracket. The guide rods are slidably connected to the inner wall of the slide. A spring is sleeved on the surface of the guide rod. The two ends of the spring are fixedly connected to the surfaces of the guide rod and the slide, respectively. Through the above components, when the winding wheel releases the wire rope, the spring cooperates with the guide rod to drive the slide to reset, and the protective plate loses its shielding effect.

[0010] Preferably, the clamping assembly includes two cylinders mounted on the inner wall of the movable seat and the base. The output end of the cylinder is fixedly connected to a movable block. The movable block is slidably connected to the inner wall of the movable seat and the base. The surface of the movable block is provided with a clamping part. By opening the cylinders, the cylinders can drive the movable block and the clamping part to move, thereby clamping the spokes.

[0011] Preferably, the clamping part includes a fixed rod fixed to the surface of the moving block, and a clamping block is rotatably connected to the surface of the fixed rod. The surface of the clamping block is provided with a flat surface and an arc-shaped surface. Through the above components, when clamping, the clamping block can be rotated to switch between the flat surface and the arc-shaped surface for clamping, thereby improving the overall flexibility.

[0012] Preferably, the inner wall of the clamping block is threaded with a bolt, which is inserted into the inner wall of the fixing rod. Through the above-mentioned components, when the clamping block switches between the flat and arc-shaped surfaces, the bolt can be rotated, and the bolt can be inserted into the inner wall of the fixing rod to achieve positioning.

[0013] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0014] 1. In this utility model, by setting an auxiliary device, the control component pulls the two slides to move in the slide rail, so that the protective plate can be quickly merged and form a closed protective space with the bracket, which effectively reduces the debris that may fly when the carbon fiber spokes break, and reduces the phenomenon of operators being cut by the debris. At the same time, the positioning part can lock the position of the slide after the protective plate is merged, without the need for the control component to work continuously, and the reset part can control the slide to reset.

[0015] 2. In this utility model, by setting a clamping assembly, the cylinder two drives the moving block and the clamping part to move, which can clamp the spokes. At the same time, the clamping block can switch between a flat surface and an arc surface by rotation, and then be positioned by bolts inserted into the fixed rod. Attached Figure Description

[0016] Figure 1 This utility model provides a three-dimensional structural schematic diagram of a tensile strength testing device for carbon fiber products;

[0017] Figure 2 This utility model proposes a tensile testing device for carbon fiber products. Figure 1 Schematic diagram of the structure at point A in the middle;

[0018] Figure 3 This utility model provides a schematic diagram of the auxiliary device structure of a tensile testing device for carbon fiber products;

[0019] Figure 4 This utility model provides a schematic diagram of the clamping assembly structure of a tensile testing device for carbon fiber products;

[0020] Figure 5 This utility model provides a schematic diagram of the clamping component of a tensile testing device for carbon fiber products.

[0021] Legend:

[0022] 1. Machine body; 2. Bracket; 3. Screw; 4. Moving frame; 5. Base; 6. Moving seat; 7. Protective device; 71. Slide rail; 72. Rewinding motor; 73. Winding wheel; 74. Wire rope; 75. Protective plate; 76. Positioning hole; 77. Cylinder 1; 78. Insert shaft; 79. Slide seat; 710. Guide rod; 711. Spring; 8. Clamping assembly; 81. Cylinder 2; 82. Moving block; 83. Fixed rod; 84. Clamping block; 85. Bolt. Detailed Implementation

[0023] Please see Figure 1 - Figure 5 This utility model provides a technical solution: a tensile strength testing device for carbon fiber products, including a body 1, a bracket 2 mounted on the surface of the body 1, a movable frame 4 slidably connected to the inner wall of the bracket 2, a movable seat 6 and a base 5 respectively fixedly connected to the movable frame 4 and the surface of the body 1, a clamping assembly 8 provided on the movable seat 6 and the base 5, a screw 3 rotatably connected to the inner wall of the bracket 2, the screw 3 being threadedly connected to the inner wall of the movable seat 6, a motor (not shown in the figure) provided on the inner wall of the body 1 for driving the screw 3 to rotate, and a protective device 7 provided on the surface of the bracket 2.

[0024] Specifically, the protective device 7 includes slide rails 71 fixed to both sides of the bracket 2. Slide seats 79 are slidably connected to the surface of the slide rails 71. Two protective plates 75 are fixedly connected to the surface of the slide seats 79. The surface of the bracket 2 is provided with a control component for controlling the movement of the two slide seats 79 so that the protective plates 75 can be combined for protection. The surface of the bracket 2 is provided with a reset part for controlling the slide seats 79 and the protective plates 75 to reset. The surface of the slide seats 79 is provided with a positioning part for positioning the slide seats 79.

[0025] In this implementation scheme: During testing, the control component drives the two slide blocks 79 to move on the slide rail 71. The two slide blocks 79 drive the protective plate 75 to merge, thereby blocking both sides and achieving protection. At the same time, the positioning unit can position the slide blocks 79 after the protective plate 75 is merged.

[0026] Specifically, the control components include a winding motor 72 installed in the inner wall of the bracket 2, with a winding wheel 73 fixedly connected to the output end of the winding motor 72. Two sets of steel wire ropes 74 are wound and fixedly connected to the surface of the winding wheel 73, and the other ends of the two sets of steel wire ropes 74 are fixedly connected to the surface of two slide blocks 79 respectively.

[0027] In this implementation scheme: When controlling, the winding motor 72 is turned on, the winding motor 72 drives the winding wheel 73 to rotate, the winding wheel 73 winds up the two sets of steel wire ropes 74 respectively, and the steel wire ropes 74 drive the slide block 79 to move on the slide rail 71.

[0028] Specifically, the positioning unit includes a cylinder 77 fixed on the surface of the slide 79. The output end of the cylinder 77 is fixedly connected to a shaft 78, which passes through the slide 79. The surface of the bracket 2 is provided with a positioning hole 76. The shaft 78 is inserted into the inner wall of the positioning hole 76. The cylinder 77 drives the shaft 78 to move, and the shaft 78 can be inserted into the positioning hole 76, which can realize the positioning of the slide 79 and reduce the burden on the winding motor 72.

[0029] Specifically, the reset part includes two guide rods 710 fixed on the surface of the bracket 2. The guide rods 710 are slidably connected to the inner wall of the slide block 79. A spring 711 is sleeved on the surface of the guide rods 710. The two ends of the spring 711 are fixedly connected to the surfaces of the guide rods 710 and the slide block 79, respectively.

[0030] In this implementation plan: when the winding wheel 73 releases the wire rope 74, the spring 711, in conjunction with the guide rod 710, can drive the slide 79 to reset, and the protective plate 75 loses its shielding.

[0031] Specifically, the clamping assembly 8 includes two cylinders 81 installed on the inner walls of the movable seat 6 and the base 5. The output end of the cylinders 81 is fixedly connected to a movable block 82. The movable block 82 is slidably connected to the inner walls of the movable seat 6 and the base 5. The surface of the movable block 82 is provided with a clamping part, which includes a fixing rod 83 fixed on the surface of the movable block 82. The surface of the fixing rod 83 is rotatably connected to a clamping block 84. The surface of the clamping block 84 is provided with a flat surface and an arc-shaped surface. The inner wall of the clamping block 84 is threadedly connected with a bolt 85, which is inserted into the inner wall of the fixing rod 83.

[0032] In this implementation scheme: when cylinder 81 is opened, cylinder 81 can drive the moving block 82 and the clamping part to move, thereby clamping the spokes. When clamping, clamping block 84 can be rotated to switch between flat or curved surfaces for clamping. After switching between flat and curved surfaces, clamping block 84 can rotate bolt 85. Bolt 85 can be inserted into the inner wall of fixing rod 83 to achieve positioning and improve overall flexibility.

[0033] Working principle: During use, the clamping parts on the moving seat 6 and the base 5 can be controlled separately. Opening cylinder 81 causes the moving block 82 and clamping block 84 to move. Clamping block 84 clamps the spokes. Before clamping, clamping block 84 can be adjusted as needed. Rotating clamping block 84 switches between flat and curved surfaces for clamping. After switching between flat and curved surfaces, bolt 85 can be rotated. Bolt 85 is inserted into the inner wall of the fixing rod 83 for positioning. After clamping, the motor controls the screw 3 to rotate, driving the moving frame 4 and moving seat 6 to move, pulling the spokes. The test results will be... The information is displayed on the accompanying computer screen for easy and intuitive reading and recording. During testing, the winding motor 72 is turned on, which drives the winding wheel 73 to rotate. The winding wheel 73 winds up two sets of wire ropes 74 respectively. The wire ropes 74 drive the slide block 79 to move on the slide rail 71. The spring 711 is stressed, causing the protective plate 75 to close. Then, the cylinder 77 drives the insertion shaft 78 to be inserted into the positioning hole 76, thus realizing the protective operation. When opening, the cylinder 77 drives the insertion shaft 78 to reset. At the same time, the winding motor 72 drives the winding wheel 73 to rotate in the opposite direction to release the wire ropes 74. The spring 711 drives the slide block 79 and the protective plate 75 to reset and unfold.

Claims

1. A tensile testing apparatus for carbon fibre products comprising a body (1) characterised in that: A bracket (2) is installed on the surface of the body (1). A movable frame (4) is slidably connected to the inner wall of the bracket (2). A movable seat (6) and a base (5) are fixedly connected to the surface of the movable frame (4) and the body (1), respectively. A clamping assembly (8) is provided on both the movable seat (6) and the base (5). A screw (3) is rotatably connected to the inner wall of the bracket (2). The screw (3) is threadedly connected to the inner wall of the movable seat (6). A motor is provided on the inner wall of the body (1) to drive the screw (3) to rotate. A protective device (7) is provided on the surface of the bracket (2). The protective device (7) includes slide rails (71) fixed on both sides of the bracket (2). A slide block (79) is slidably connected to the surface of the slide rail (71). Two protective plates (75) are fixedly connected to the surface of the slide block (79). A control component is provided on the surface of the bracket (2) to control the movement of the two slide blocks (79) so that the protective plates (75) can be combined for protection. A reset part is provided on the surface of the bracket (2) to control the slide block (79) and the protective plate (75) to reset. A positioning part is provided on the surface of the slide block (79) to position the slide block (79).

2. A tensile testing apparatus for carbon fiber articles according to claim 1, wherein: The control component includes a winding motor (72) installed in the inner wall of the bracket (2). The output end of the winding motor (72) is fixedly connected to a winding wheel (73). Two sets of steel wire ropes (74) are wound and fixedly connected to the surface of the winding wheel (73). The other ends of the two sets of steel wire ropes (74) are fixedly connected to the surface of two slides (79).

3. A tensile testing apparatus for carbon fiber articles as defined in claim 1, wherein: The positioning part includes a cylinder (77) fixed on the surface of the slide (79). The output end of the cylinder (77) is fixedly connected to a shaft (78). The shaft (78) passes through the slide (79). The surface of the bracket (2) is provided with a positioning hole (76). The shaft (78) is inserted into the inner wall of the positioning hole (76).

4. The tensile strength testing device for carbon fiber products according to claim 1, characterized in that: The reset part includes two guide rods (710) fixed on the surface of the bracket (2). The guide rods (710) are slidably connected to the inner wall of the slide (79). A spring (711) is sleeved on the surface of the guide rods (710). The two ends of the spring (711) are fixedly connected to the surfaces of the guide rods (710) and the slide (79), respectively.

5. The tensile strength testing device for carbon fiber products according to claim 1, characterized in that: The clamping assembly (8) includes two cylinders (81) installed on the inner walls of the movable seat (6) and the base (5). The output end of the cylinder (81) is fixedly connected to a movable block (82). The movable block (82) is slidably connected to the inner walls of the movable seat (6) and the base (5). The surface of the movable block (82) is provided with a clamping part.

6. The tensile strength testing device for carbon fiber products according to claim 5, characterized in that: The clamping part includes a fixing rod (83) fixed on the surface of the moving block (82), and a clamping block (84) is rotatably connected to the surface of the fixing rod (83). The surface of the clamping block (84) is provided with a plane and an arc-shaped surface.

7. The tensile strength testing device for carbon fiber products according to claim 6, characterized in that: The inner wall of the clamping block (84) is threaded with a bolt (85), which is inserted into the inner wall of the fixing rod (83).

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