Automobile nylon tube strength detection equipment

Abstract

The utility model discloses strength detection equipment for an automobile nylon tube, which belongs to the field of detection equipment and comprises a base, a controller arranged on one side of the base, racks arranged on the top surface of the base, fixed plates arranged on the top surfaces of the racks, movable plates movably arranged between the left and right symmetrical racks, and a fixing mechanism. When tensile strength detection is carried out on automobile nylon tubes with different diameters, a corresponding clamp is selected, a connecting column on the bottom surface of the clamp is positioned and inserted into an insertion hole through matching of a positioning strip and an upper positioning groove, and a knob is rotated through matching use of an external thread and an internal thread hole, so that the knob drives a limiting ring to move downwards on the outer wall of a fixed seat; and after the limiting ring extrudes the semispherical block to enable the semispherical block to enter the through hole, the semispherical block pushes the movable piece towards the inner side direction and forces the spring to make tightening operation, the limiting rod penetrates through the fixing ring to be inserted into the limiting hole, and therefore the purpose that the clamp can be disassembled, assembled, replaced and used conveniently is achieved.

Description

Technical Field

[0001] This utility model relates to the field of testing equipment, and in particular to a strength testing device for automotive nylon tubes. Background Technology

[0002] Automotive nylon tubing is an engineering plastic tubing made primarily of nylon (polyamide). It is formed through extrusion or casting processes and possesses properties such as lightweight, wear resistance, corrosion resistance, impact resistance, and good flexibility. In the automotive industry, nylon tubing is widely used in fuel, braking, cooling, and air conditioning systems. It allows for rapid connections via cold plugging or laser welding, and can withstand the high-temperature environment of the engine compartment while also being flexible enough to optimize space layout, making it an ideal alternative to metal and rubber tubing.

[0003] In existing technologies, during the actual assembly of automobiles, nylon tubing undergoes a series of operations such as laying, bending, and fixing. These operations inevitably apply tensile forces to the nylon tubing. If the tensile strength of the nylon tubing does not meet the requirements, it is prone to cracking, damage, or deformation during installation, which in turn affects the normal installation and connection of the piping system and adversely impacts the overall performance of the vehicle. Therefore, accurately testing the tensile strength of automotive nylon tubing is crucial, making a tensile testing machine an indispensable piece of equipment in the testing process.

[0004] However, current automotive nylon tubing comes in a wide variety of diameters, ranging from small, thin tubes to larger diameter pipes. Different diameter nylon tubing requires different clamping force and contact area from the fixtures during tensile strength testing. Existing tensile testing machines typically use the same set of fixtures, which is insufficient to provide ideal clamping results for nylon tubing of varying diameters. Specifically, for thinner nylon tubing, using large-sized fixtures leads to uneven clamping force distribution and excessive local pressure, potentially damaging the tubing. Conversely, for thicker nylon tubing, small-sized fixtures cannot provide sufficient clamping force, leading to slippage during tensile testing and severely impacting the accuracy of the test results. To ensure reliable testing, it is essential to replace the fixtures with appropriate ones according to the diameter of the nylon tubing.

[0005] Currently, most tensile testing machines use bolted connections for their fixtures. This method has significant drawbacks when performing tensile tests on automotive nylon tubing of different diameters. The cumbersome disassembly and replacement process requires considerable time and effort, making it difficult to quickly change fixtures and thus greatly reducing the testing efficiency of automotive nylon tubing. This makes it difficult to meet the current automotive industry's demand for rapid component testing. Utility Model Content

[0006] The main objective of this invention is to provide a strength testing device for automotive nylon tubing, which can effectively solve the problems in the background art.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0008] A strength testing device for automotive nylon tubing includes a base, a controller on one side of the base, a frame on the top surface of the base, a fixed plate on the top surface of the frame, and a movable plate movably connected between the left and right symmetrical frames. A tension sensor is fixedly connected to the bottom surface of the fixed plate. The bottom end of the tension sensor and the top surface of the movable plate are respectively fixedly connected to clamps by a fixing mechanism. The fixing mechanism includes a fixed seat, a limiting ring, a fixed ring, a movable piece, a slider, and a hemispherical block. The limiting ring is movably connected to the outside of the fixed seat by a knob at the top, and symmetrical fixed rings are fixedly connected inside the fixed seat. The movable piece is movably connected to the fixed ring by a limiting rod on the inner side wall, and a spring is sleeved on the outside of the limiting rod. The hemispherical block is fixedly connected to the outer side wall of the movable piece.

[0009] In a preferred embodiment, a connecting post is fixedly installed at the bottom end of the clamp, and a set of symmetrical positioning strips are fixedly installed on the outer wall of the connecting post. A set of symmetrical limiting holes are also provided on the outer wall of the connecting post.

[0010] In a preferred embodiment, a fixing base is fixedly installed on the top surface of the movable plate and the bottom of the sensing end of the tension sensor, and the top surface of the fixing base is provided with an insertion hole, and a set of symmetrical positioning grooves are provided on the inner wall of the insertion hole.

[0011] In a preferred embodiment, the outer wall of the fixing seat is provided with an external thread, and a set of symmetrical through holes communicating with the insertion hole are also provided on the outer wall of the fixing seat below the external thread, and a set of symmetrical sliding grooves are provided inside the through holes.

[0012] In a preferred embodiment, the top surface of the knob has an internal threaded hole that is threaded to the external thread, and a limit ring is fixedly installed at the bottom end of the knob.

[0013] In a preferred embodiment, a fixing ring is fixedly installed at the inner end of the through hole, a set of symmetrical sliders are fixedly installed on the outer wall of the movable piece and movably installed in the slide groove, and a limiting rod is fixedly installed on the inner wall of the movable piece and inserted into the fixing ring. The limiting rod passes through the fixing ring and is inserted into the limiting hole, and a spring is sleeved on the outside of the limiting rod and fixedly installed between the fixing ring and the opposite wall of the movable piece. The hemispherical block is fixedly installed on the outer wall of the movable piece.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] In this invention, the fixing mechanism, when testing the tensile strength of automotive nylon tubes of different diameters, selects the corresponding clamp. After the connecting post on the bottom of the clamp is positioned and inserted into the insertion hole by the positioning strip and positioning groove, the knob is rotated through the cooperation of the external thread and the internal thread hole. The knob drives the limiting ring to move downward on the outer wall of the fixing seat until the limiting ring squeezes the hemispherical block and makes the hemispherical block enter the through hole. Then, the hemispherical block pushes the movable piece inward and forces the spring to contract. After that, the limiting rod passes through the fixing ring and is inserted into the limiting hole. In this way, the clamp can be quickly installed and fixed on the movable plate and the tension sensor, thereby facilitating the disassembly and replacement of the clamp. The operation is simple, without the need for a cumbersome bolt disassembly and assembly process, which greatly saves the time and effort of changing the clamp and improves the testing efficiency of automotive nylon tubes. It can well meet the current needs of the automotive industry for rapid testing of parts. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the overall structure of the clamp of this utility model;

[0018] Figure 3 This is a schematic diagram of the overall structure of the fixing mechanism of this utility model;

[0019] Figure 4 This is a cross-sectional view of the fixing mechanism of this utility model.

[0020] In the diagram: 1. Base; 2. Controller; 3. Frame; 4. Fixed plate; 5. Movable plate; 6. Tension sensor; 7. Clamp; 8. Fixing mechanism; 9. Connecting column; 10. Positioning strip; 11. Limiting hole; 12. Fixed seat; 13. Insertion hole; 14. Positioning groove; 15. External thread; 16. Through hole; 17. Slide groove; 18. Knob; 19. Internal threaded hole; 20. Limiting ring; 21. Fixed ring; 22. Movable piece; 23. Slider; 24. Limiting rod; 25. Spring; 26. Hemispherical block. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0022] like Figure 1 - Figure 4As shown, a strength testing device for automotive nylon tubing includes a base 1, a controller 2 on one side of the base 1, a frame 3 on the top surface of the base 1, a fixed plate 4 on the top surface of the frame 3, and a movable plate 5 movably connected between the left and right symmetrical frames 3. A tension sensor 6 is fixedly connected to the bottom surface of the fixed plate 4. The bottom end of the tension sensor 6 and the top surface of the movable plate 5 are respectively fixedly connected to a clamp 7 by a fixing mechanism 8. The fixing mechanism 8 includes a fixed seat 12, a limiting ring 20, a fixed ring 21, a movable piece 22, a slider 23, and a hemispherical block 26. The limiting ring 20 is movably connected to the outside of the fixed seat 12 by a knob 18 at the top end, and symmetrical fixed rings 21 are fixedly connected inside the fixed seat 12. The movable piece 22 is movably connected to the fixed ring 21 by a limiting rod 24 on the inner side wall, and a spring 25 is sleeved on the outside of the limiting rod 24. The hemispherical block 26 is fixedly connected to the outer side wall of the movable piece 22.

[0023] like Figure 2 As shown, a connecting post 9 is fixedly installed at the bottom of the clamp 7, and a set of symmetrical positioning strips 10 are fixedly installed on the outer wall of the connecting post 9. A set of symmetrical limiting holes 11 are also provided on the outer wall of the connecting post 9. The connecting post 9 serves as a transition component connecting the clamp 7 and the fixed base 12, while the positioning strips 10 and limiting holes 11 play a role in positioning and auxiliary fixing. The symmetrical arrangement of the positioning strips 10, which cooperate with the positioning grooves 14 on the fixed base 12, can guide the clamp 7 to be accurately positioned during installation, ensuring the positional accuracy of the clamp installation. The limiting holes 11 provide an installation position for the subsequent insertion of the limiting rod 24, thereby achieving a more stable connection between the clamp 7 and the fixed base 12.

[0024] like Figure 3 and Figure 4 As shown, a fixed base 12 is fixedly installed on the top surface of the movable plate 5 and the bottom of the sensing end of the tension sensor 6, respectively. The top surface of the fixed base 12 is provided with an insertion hole 13. A set of symmetrical positioning grooves 14 are provided on the inner wall of the insertion hole 13. The insertion hole 13 is used to accommodate the connecting column 9 so that the clamp 7 can be connected to the fixed base 12. The positioning groove 14 corresponds to the positioning strip 10 on the connecting column 9. When the connecting column 9 is inserted into the insertion hole 13, the positioning strip 10 can be embedded in the positioning groove 14, which plays the role of positioning and initial fixation, restricting the rotation of the connecting column 9 in the insertion hole 13, and ensuring the accuracy of the installation direction of the clamp 7.

[0025] like Figure 3 and Figure 4As shown, the outer wall of the fixed base 12 is provided with an external thread 15, and a set of symmetrical through holes 16 communicating with the insertion hole 13 are also provided on the outer wall of the fixed base 12 below the external thread 15. A set of symmetrical sliding grooves 17 are provided inside the through holes 16. The external thread 15 is used to cooperate with the internal thread hole 19 of the knob 18. The fixed mechanism 8 is operated by rotating the knob 18. The through holes 16 communicate with the insertion hole 13, providing installation space for components such as the movable piece 22 and the limiting rod 24, so that these components can interact with the limiting hole 11 on the connecting column 9. The sliding groove 17 provides a sliding track for the slider 23 on the movable piece 22, ensuring that the movable piece 22 can move in a specific direction within the fixed base 12, thereby realizing the extension and retraction of the limiting rod 24, so as to achieve the purpose of fixing or releasing the clamp 7.

[0026] like Figure 3 and Figure 4 As shown, the top surface of the knob 18 is provided with an internal thread hole 19 that is threaded to the external thread 15, and a limit ring 20 is fixedly installed at the bottom end of the knob 18. When the knob 18 is rotated, the knob 18 will move along the axial direction of the fixed seat 12. The limit ring 20 is fixed at the bottom end of the knob 18 and moves with the movement of the knob 18 to squeeze or release the hemispherical block 26 to fix or contact the clamp 7.

[0027] like Figure 3 and Figure 4 As shown, a retaining ring 21 is fixedly installed on the inner end of the through hole 16. A set of symmetrical sliders 23 are fixedly installed on the outer wall of the movable piece 22 and movably installed in the slide groove 17. A limiting rod 24 is fixedly installed on the inner wall of the movable piece 22 and is inserted into the retaining ring 21. The limiting rod 24 passes through the retaining ring 21 and is inserted into the limiting hole 11. A spring 25 is fitted on the outside of the limiting rod 24 and fixedly installed on the opposite side of the retaining ring 21 and the movable piece 22. During operation, the hemispherical block 26 is fixedly installed on the outer wall of the movable piece 22. When the knob 18 is rotated, the limiting ring 20 pushes the hemispherical block 26, causing the movable piece 22 to move inward. The limiting rod 24 is inserted into the limiting hole 11, and at the same time, the spring 25 is compressed to fix the clamp 7. When the knob 18 is rotated in the opposite direction, the spring 25 returns to its original shape, pushes the movable piece 22 to move outward, and the limiting rod 24 is pulled out from the limiting hole 11, releasing the clamp 7 to achieve quick disassembly and replacement of the clamp 7.

[0028] The working principle of the fixing mechanism 8 in conjunction with the tensile testing machine for testing the tensile strength of automotive nylon tubing is as follows:

[0029] Select the appropriate clamp 7 according to the thickness of the nylon tube to be tested. Insert the connecting post 9 at the bottom of the clamp 7 into the insertion hole 13 on the top surface of the fixing base 12, and align the positioning strip 10 on the outer wall of the connecting post 9 with the positioning groove 14 on the inner wall of the insertion hole 13 to achieve the positioning and installation of the clamp 7. Then rotate the knob 18 located on the outer wall of the fixing base 12. The knob 18 will rotate and move downwards through the internal thread hole 19 on the top surface and along the external thread 15 on the outer wall of the fixing base 12. At the same time, the limiting ring 20 installed at the bottom will move downwards. As the device rotates and moves, the limiting ring 20 moves downward to a certain extent, pressing the hemispherical block 26 protruding from the outer wall of the fixing seat 12. After being pressed, the hemispherical block 26 enters the through hole 16, and pushes the movable piece 22 to move inward in the through hole 16. During the movement, the slider 23 installed on the outer wall will slide in the groove 17 opened on the inner wall of the through hole 16. The movable piece 22 will also force the spring 25 fitted outside the limiting rod 24 to tighten, so that the limiting rod 24 passes through the fixing ring 21 and is inserted into the limiting hole 11 opened on the outer wall of the connecting column 9. Once the limiting ring 20 completely covers the through hole 16, the clamp 7 can be quickly installed and fixed on the movable plate 5 and the tension sensor 6. After the clamp 7 is installed and fixed, both ends of the automotive nylon tube are clamped and fixed by the symmetrical clamps 7. Then, the controller 2 operates the movable plate 5 to move downward between the frames 3 and pull the automotive nylon tube. When the automotive nylon tube is stretched, the tension sensor 6 will detect the tension to determine whether the tensile strength of the automotive nylon tube meets the requirements, thus completing the tensile strength test of the automotive nylon tube. The clamp 7 needs to be adjusted subsequently. During disassembly, the knob 18 can be rotated in the opposite direction to move the limiting ring 20 upward and stop pressing the hemispherical block 26. The spring 25 will then elastically extend and push the movable piece 22 outward, causing the movable piece 22 to move the limiting rod 24 out of the limiting hole 11. This allows the clamp 7 to be disassembled, facilitating its disassembly and replacement. The operation is simple, eliminating the need for cumbersome bolt disassembly and assembly, greatly saving time and effort in replacing the clamp 7, improving the inspection efficiency of automotive nylon tubes, and effectively meeting the current automotive industry's demand for rapid component inspection.

[0030] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A strength testing device for automotive nylon tubing, comprising a base (1), a controller (2) provided on one side of the base (1), and a frame (3) provided on the top surface of the base (1), a fixed plate (4) provided on the top surface of the frame (3), and a movable plate (5) movably provided between the left and right symmetrical frames (3), wherein a tensile sensor (6) is fixedly connected to the bottom surface of the fixed plate (4), characterized in that: The bottom end of the tension sensor (6) and the top surface of the movable plate (5) are respectively fixedly connected to the clamp (7) by the fixing mechanism (8). The fixing mechanism (8) includes a fixed seat (12), a limiting ring (20), a fixing ring (21), a movable piece (22), a slider (23), and a hemispherical block (26). The limiting ring (20) is movably connected to the outside of the fixed seat (12) by the knob (18) at the top. The fixed seat (12) is fixedly connected to the inside of the fixed seat (12) with symmetrical fixing rings (21). The movable piece (22) is movably connected to the fixing ring (21) by the limiting rod (24) on the inner side wall. The spring (25) is sleeved on the outside of the limiting rod (24). The hemispherical block (26) is fixedly connected to the outer side wall of the movable piece (22).

2. The automotive nylon tube strength testing equipment according to claim 1, characterized in that: The bottom end of the clamp (7) is fixedly installed with a connecting column (9), and a set of symmetrical positioning strips (10) are fixedly installed on the outer wall of the connecting column (9). A set of symmetrical limiting holes (11) are also opened on the outer wall of the connecting column (9).

3. The automotive nylon tube strength testing equipment according to claim 2, characterized in that: The top surface of the movable plate (5) and the bottom of the sensing end of the tension sensor (6) are respectively fixedly installed with a fixing seat (12), and the top surface of the fixing seat (12) is provided with a socket (13), and a set of symmetrical positioning grooves (14) are provided on the inner wall of the socket (13).

4. The automotive nylon tube strength testing equipment according to claim 3, characterized in that: The outer wall of the fixed seat (12) is provided with an external thread (15), and a set of symmetrical through holes (16) communicating with the insertion hole (13) are also provided on the outer wall of the fixed seat (12) and below the external thread (15). A set of symmetrical sliding grooves (17) are provided inside the through holes (16).

5. The automotive nylon tube strength testing device according to claim 4, characterized in that: The top surface of the knob (18) is provided with an internal thread hole (19) that is threaded to the external thread (15), and a limit ring (20) is fixedly installed at the bottom end of the knob (18).

6. The automotive nylon tube strength testing device according to claim 5, characterized in that: A fixing ring (21) is fixedly installed on the inner end of the through hole (16). A set of symmetrical sliders (23) are fixedly installed on the outer wall of the movable piece (22) and movably installed in the slide groove (17). A limiting rod (24) is fixedly installed on the inner wall of the movable piece (22) and inserted into the fixing ring (21). The limiting rod (24) passes through the fixing ring (21) and is inserted into the limiting hole (11). The limiting rod (25) is fitted on the outside of the limiting rod (24) and fixedly installed between the fixing ring (21) and the opposite wall of the movable piece (22). The hemispherical block (26) is fixedly installed on the outer wall of the movable piece (22).

Images