Spiral steel spring test bed with protective net
By installing a protective net and a locking door around the spiral steel spring test bench, the safety hazard of spiral steel spring breakage is solved, ensuring the safety and reliability of the testing process and making it widely applicable to various test benches.
Patent Information
- Application Number
- CN202520586235.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-31
- Publication Date
- 2026-03-17
- Estimated Expiration
- 2035-03-31
AI Technical Summary
The existing vertical radial stiffness testing machine for helical steel springs lacks a safety restraint mechanism, which means that when the spring breaks, the fragments threaten the safety of the test personnel.
A protective netting system is installed around the test bench, including a high-strength mesh cover and a locking door. It adopts a double locking structure of L-shaped locking pins and trapezoidal buckles, combined with a gravity sensor switch and a grounding system to ensure sealing and safety.
It effectively prevents fragments from flying when a spiral steel spring breaks, improving the safety of operators and equipment, reducing safety accidents, enhancing the continuity and reliability of testing, and reducing equipment maintenance costs.
Smart Images
Figure CN224004643U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of spring testing benches, and relates to a spiral steel spring testing bench with a protective net. Background Technology
[0002] Large-scale track maintenance machinery, as core equipment for railway maintenance operations, is characterized by its large size and high load capacity. Its operational stability and safety directly affect operational efficiency and personnel safety. As a key load-bearing component, the helical steel spring must simultaneously meet multiple functional requirements: on the one hand, it must effectively absorb the complex vibration energy generated by track irregularities and wheel-rail impacts through elastic deformation, ensuring the machinery maintains a stable posture during high-speed operation or curved travel; on the other hand, its vertical stiffness characteristics must dynamically adapt to different load conditions to adjust the car body height and ensure wheel-rail contact, thereby achieving reliable transmission of traction and braking forces. Furthermore, the helical steel spring must also limit the lateral displacement of the car body under lateral forces to prevent the risk of derailment.
[0003] According to Article 1.4.4 of the "Regulations on the Management of Repair and Maintenance of Large-scale Road Maintenance Machinery", the vertical static stiffness of helical steel springs must be forcibly tested during the fourth-level repair process. However, the existing experimental method using a vertical radial stiffness testing machine has significant safety hazards: traditional devices lack safety restraint mechanisms, and when the spring suddenly breaks or becomes unstable and bounces under extreme load, its fragments or the entire spring ejects, which will directly threaten the personal safety of the test personnel. Utility Model Content
[0004] The purpose of this invention is to solve the technical problem of significant safety hazards in the existing vertical radial stiffness testing machine for helical steel springs, and to provide a helical steel spring testing bench with a protective net.
[0005] To achieve the above objectives, the present invention adopts the following technical solution:
[0006] In a first aspect, this utility model discloses a spiral steel spring test bench with a protective net, comprising a test bench, wherein a protective net is provided around the test bench; the protective net includes a connecting and fixing frame provided around the test bench, wherein a mesh cover is fixed on the connecting and fixing frame for protecting against the impact force generated when the spiral steel spring on the test bench breaks; and a locking door is provided on the mesh cover located on the front of the test bench.
[0007] Further improvements are made in the following aspects:
[0008] One side of the locking door is movably connected to the mesh cover via a hinge, and the other side is fixedly connected to the mesh cover via a safety lock when the locking door is closed.
[0009] The safety latch includes an L-shaped locking pin welded to the locking door and a trapezoidal buckle welded to the mesh cover. The L-shaped locking pin has an anti-disengagement hook at its end, and the trapezoidal buckle has a corresponding groove on its inner side, forming a double locking structure.
[0010] The mesh cover is made of high-strength sheet mesh; the inside of the mesh cover is provided with a dustproof fine mesh.
[0011] The locked door is equipped with an explosion-proof glass observation window.
[0012] An equipment operating status warning light is installed above the locking door; a gravity sensor switch connected to the power supply of the test bench and the equipment operating status warning light is installed at the bottom of the locking door. When the locking door is opened, the power supply of the test bench is automatically cut off and the warning light alarm is triggered.
[0013] The surface of the locking door is coated with a conductive epoxy powder coating, and the surface of the locking door is connected to the grounding system of the experimental platform via a copper braided strip.
[0014] The connecting and fixing frame includes four vertical high-strength angle iron columns fixed around the test bench, and the four vertical high-strength angle iron columns are fixedly connected to each other by high-strength parallel angle irons.
[0015] The vertical high-strength angle iron columns are welded around the test bench; the four vertical high-strength angle iron columns are connected by welding high-strength parallel angle irons.
[0016] The vertical high-strength angle iron columns are fixed around the test bench by connectors; several high-strength parallel angle irons are fixedly connected between the four vertical high-strength angle iron columns by connectors.
[0017] Compared with the prior art, the present invention has the following beneficial effects:
[0018] This utility model discloses a spiral steel spring testing bench with a protective net. By setting a protective net around the testing bench, it effectively prevents the flying of fragments caused by the spiral steel spring breaking during the test, protecting the safety of operators and surrounding equipment. A locking door is installed on the mesh cover located on the front of the testing bench to ensure the sealing of the protective net during the test, further improving safety. The mesh cover is made of high-strength material with good toughness and impact resistance, effectively protecting against the impact force generated by breakage. The locking door facilitates the operator's installation or removal of the spring, while ensuring the sealing of the protective net during the test, making operation safer and more convenient. The presence of the protective net reduces interruptions caused by safety issues during the test, improving the continuity and efficiency of the test. The protective net effectively protects the testing bench and surrounding equipment from damage, reducing the frequency of equipment maintenance and replacement, and lowering testing costs. This protective net design is suitable for various types of spiral steel spring testing benches, exhibiting wide applicability. The protective net can be adjusted and expanded according to the size and shape of the testing bench to adapt to different testing needs.
[0019] Furthermore, the combination of the L-shaped locking pin and the trapezoidal buckle forms a double locking structure, increasing the stability of the locked door and effectively preventing accidental opening during the test, thus further improving the safety of the test. The anti-disengagement hook at the end of the L-shaped locking pin prevents the pin from accidentally disengaging from the trapezoidal buckle, enhancing the reliability of the lock and ensuring the sealing of the protective net during the test, avoiding safety accidents caused by accidental opening of the locked door.
[0020] Furthermore, a high-density fine-mesh dustproof mesh is added to the inside of the sheet-like mesh to maintain observation transparency while blocking metal debris generated during spring experiments. An explosion-proof glass window is embedded in the center of the locking door to meet the high-definition observation requirements of special experiments.
[0021] Furthermore, the gravity sensor switch at the bottom of the locking door automatically cuts off the power to the test bench when the door is opened, effectively preventing accidents caused by accidental door opening during testing and protecting the safety of operators. The equipment's operating status warning light emits an alarm signal when the locking door is opened, alerting operators that the test bench is in an abnormal operating state, enhancing the safety warning function during testing and preventing misoperation. The combination of automatic power-off and warning light alarms forms a dual safety guarantee mechanism, ensuring the safety and reliability of the testing process and reducing safety hazards caused by human negligence.
[0022] Furthermore, the conductive epoxy powder coating on the surface of the locking door effectively prevents static electricity accumulation, avoiding harm to the test equipment and operators caused by electrostatic discharge, thus improving test safety. Connecting the locking door to the test bench grounding system via copper braided straps ensures timely discharge of static electricity, further enhancing electrostatic protection and reducing safety risks caused by static electricity. This grounding design not only prevents static electricity accumulation but also improves the electromagnetic compatibility of the test equipment to a certain extent, reducing the impact of electromagnetic interference on test results and improving the reliability and accuracy of the test.
[0023] Furthermore, the vertical high-strength angle iron columns are fixed around the test bench using connectors, and several high-strength parallel angle irons are also fixedly connected between the columns using connectors. This connection method facilitates installation and disassembly, improving the ease of equipment maintenance. The connector fixing method can be flexibly adjusted according to the size and shape of the test bench to adapt to different specifications of test benches, improving the versatility and applicability of the equipment. By fixing several high-strength parallel angle irons with connectors, the number of angle irons can be increased or decreased as needed, realizing the expansion or contraction of the connection and fixing frame to meet different testing requirements and improving the scalability of the equipment. Attached Figure Description
[0024] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0025] Figure 1 This is a perspective view of a spiral steel spring test bench with a protective net according to the present invention.
[0026] Figure 2 This is a front view of the protective netting of a spiral steel spring test bench with a protective netting, according to this utility model.
[0027] Among them: 1-mesh cover; 2-hinge; 3-safety latch; 4-locking door; 5-connecting bracket; 6-fixed connection hole; 7-test bench. Detailed Implementation
[0028] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0029] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.
[0030] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0031] In the description of the embodiments of this utility model, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use, they are only for the convenience of describing the 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 the utility model. Furthermore, terms such as "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0032] Furthermore, the use of the term "horizontal" does not imply that the component must be absolutely horizontal, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.
[0033] In the description of the embodiments of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0034] The present invention will now be described in further detail with reference to the accompanying drawings:
[0035] Example 1
[0036] See Figure 1 and Figure 2This utility model discloses a spiral steel spring test bench with a protective net, including a test bench 7, with a protective net surrounding the test bench 7. The protective net includes connecting and fixing frames 5 arranged around the test bench 7, and a mesh cover 1 fixed on the connecting and fixing frames 5 to protect against the impact force generated when the spiral steel spring on the test bench 7 breaks. A locking door 4 is provided on the mesh cover 1 located on the front of the test bench 7, and an explosion-proof glass observation window is provided on the locking door 4. The mesh cover 1 is made of high-strength sheet mesh; the inside of the mesh cover 1 is provided with a dustproof fine mesh, which maintains observation transparency and blocks metal debris generated during spring experiments. An explosion-proof glass window is embedded in the center of the locking door to meet the high-definition observation requirements of special experiments. One side of the locking door 4 is movably connected to the mesh cover 1 by a hinge 2, and the other side is fixedly connected to the mesh cover 1 by a safety lock 3 when the locking door 4 is closed. The safety latch 3 includes an L-shaped locking pin welded to the locking door 4 and a trapezoidal buckle welded to the mesh cover 1. The L-shaped locking pin has an anti-disengagement hook at its end, and the trapezoidal buckle has a corresponding groove on its inner side, forming a double locking structure. The cooperation of the L-shaped locking pin and the trapezoidal buckle creates a double locking structure, increasing the stability of the locking door and effectively preventing accidental opening during the test, thus further improving the safety of the test. The anti-disengagement hook at the end of the L-shaped locking pin prevents the locking pin from accidentally disengaging from the trapezoidal buckle, enhancing the reliability of the lock, ensuring the sealing of the protective mesh during the test, and avoiding safety accidents caused by accidental opening of the locking door.
[0037] A device operating status warning light is installed above the locking door 4; a gravity sensor switch connected to the power supply of the test bench 7 and the device operating status warning light is installed at the bottom of the locking door 4. When the locking door 4 is opened, the power supply to the test bench 7 is automatically cut off and the warning light alarm is activated. The gravity sensor switch at the bottom of the locking door can automatically cut off the power supply to the test bench when the locking door is opened, effectively preventing safety accidents caused by accidental opening during the test and protecting the safety of the operators. The device operating status warning light can emit an alarm signal when the locking door is opened, reminding the operator that the test bench is in an abnormal working state, enhancing the safety warning function of the test process and avoiding misoperation. The combination of automatic power cut-off and warning light alarm forms a dual safety protection mechanism, ensuring the safety and reliability of the test process and reducing safety hazards caused by human negligence.
[0038] The surface of the locking door 4 is coated with a conductive epoxy powder coating, and the surface of the locking door 4 is connected to the grounding system of the experimental platform 7 via a copper braided strap. The conductive epoxy powder coating on the locking door surface effectively prevents static electricity accumulation, avoiding harm to the test equipment and operators caused by electrostatic discharge, thus improving the safety of the experiment. Connecting the locking door to the grounding system of the experimental platform via the copper braided strap ensures that static electricity can be discharged in a timely manner, further enhancing the electrostatic protection effect and reducing the safety risks caused by static electricity. This grounding design not only prevents static electricity accumulation but also improves the electromagnetic compatibility of the test equipment to a certain extent, reduces the impact of electromagnetic interference on the test results, and improves the reliability and accuracy of the experiment.
[0039] The connecting frame 5 includes four vertical high-strength angle iron columns fixed around the perimeter of the test bench 7. These four columns are connected by high-strength parallel angle irons. The vertical high-strength angle iron columns are welded to the perimeter of the test bench 7; the four columns are connected by welding high-strength parallel angle irons. This welding method ensures a secure connection between the connecting frame and the test bench, enhancing the overall stability of the protective net. The welded connection has high structural strength, capable of withstanding significant impact and tensile forces, ensuring that the protective net will not loosen or deform due to external forces during testing, thus improving the safety and reliability of the test. The welded connection forms an integrated structure between the connecting frame and the test bench, reducing the use of connecting parts, lowering the safety risks caused by loose or damaged connecting parts, and extending the service life of the equipment.
[0040] Example 2
[0041] The difference between this embodiment and Embodiment 1 is that: the bottom of the vertical high-strength angle iron column is provided with fixing connection holes 6, which are used to fix the vertical high-strength angle iron column to the perimeter of the test bench 7 through connectors; several high-strength parallel angle irons are fixedly connected between the four vertical high-strength angle iron columns through connectors. Connectors, such as bolts, facilitate installation and disassembly, improving the ease of equipment maintenance. The fixing method of the connectors can be flexibly adjusted according to the size and shape of the test bench to adapt to different specifications of test benches, improving the versatility and applicability of the equipment. By fixing several high-strength parallel angle irons through connectors, the number of angle irons can be increased or decreased as needed, realizing the expansion or contraction of the connecting frame to meet different testing requirements and improving the scalability of the equipment.
[0042] This utility model discloses a spiral steel spring testing bench with a protective net. By setting a protective net around the testing bench, it effectively prevents the flying of fragments caused by the spiral steel spring breaking during the test, protecting the safety of operators and surrounding equipment. A locking door is installed on the mesh cover located on the front of the testing bench to ensure the sealing of the protective net during the test, further improving safety. The mesh cover is made of high-strength material with good toughness and impact resistance, effectively protecting against the impact force generated by breakage. The locking door facilitates the operator's installation or removal of the spring, while ensuring the sealing of the protective net during the test, making operation safer and more convenient. The presence of the protective net reduces interruptions caused by safety issues during the test, improving the continuity and efficiency of the test. The protective net effectively protects the testing bench and surrounding equipment from damage, reducing the frequency of equipment maintenance and replacement, and lowering testing costs. This protective net design is suitable for various types of spiral steel spring testing benches, exhibiting wide applicability. The protective net can be adjusted and expanded according to the size and shape of the testing bench to adapt to different testing needs.
[0043] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A spiral steel spring testing bench with a protective screen, characterized in that, The test bench (7) is provided with a protective net; the protective net comprises a connecting fixed frame (5) arranged around the test bench (7), and a net-shaped cover (1) is fixed on the connecting fixed frame (5) and used for protecting the impact force generated when the spiral steel spring on the test bench (7) bursts; a locking door (4) is arranged on the net-shaped cover (1) in front of the test bench (7); one side of the locking door (4) is movably connected to the net-shaped cover (1) through a hinge (2), and the other side is fixedly connected to the net-shaped cover (1) when the locking door (4) is closed through a safety lock buckle (3); the safety lock buckle (3) comprises an L-shaped lock pin welded on the locking door (4) and a trapezoidal buckle welded on the net-shaped cover (1), the L-shaped lock pin is provided with an anti-dropping barb at the tail end, and the trapezoidal buckle is provided with a corresponding groove on the inner side, so as to form a double locking structure; A device working state warning light is arranged above the locking door (4); a gravity sensing switch connected with the power supply of the test bench (7) and the device working state warning light is arranged at the bottom of the locking door (4), so that when the locking door (4) is opened, the power supply of the test bench (7) is automatically cut off and the warning light alarm is sent.
2. The spiral steel spring testing bench with a protective screen according to claim 1, characterized in that, The net-shaped cover (1) is made of high-strength sheet net; a dust prevention fine mesh net is arranged in the net-shaped cover (1).
3. The spiral steel spring testing bench with a protective screen according to claim 1, characterized in that, An explosion-proof glass observation window is arranged on the locking door (4).
4. The spiral steel spring testing bench with a protective screen according to claim 1, characterized in that, The surface of the locking door (4) is coated with a conductive epoxy powder coating, and the surface of the locking door (4) is connected with the grounding system of the test bench (7) through a copper braid.
5. The spiral steel spring testing bench with a protective screen according to claim 1, characterized in that, The connecting fixed frame (5) comprises four vertical high-strength angle iron columns fixed around the test bench (7), and the four vertical high-strength angle iron columns are fixedly connected through high-strength parallel angle irons.
6. The spiral steel spring testing bench with a protective screen according to claim 5, characterized in that, The vertical high-strength angle iron columns are welded around the test bench (7); the four vertical high-strength angle iron columns are welded and connected through high-strength parallel angle irons.
7. The spiral steel spring testing bench with a protective screen according to claim 5, characterized in that, The vertical high-strength angle iron columns are fixed around the test bench (7) through connecting pieces; the four vertical high-strength angle iron columns are fixedly connected through connecting pieces and several high-strength parallel angle irons.