Digital display type spring tension and compression testing machine

Abstract

The utility model discloses a digital display type spring tension and compression testing machine, and relates to the technical field of spring testing, the digital display type spring tension and compression testing machine comprises a base, the base is provided with a tension and compression assembly used for carrying out tension and compression testing on a spring, the tension and compression assembly comprises a placing table fixedly connected to the upper surface of the base, and vertical supporting plates are fixedly connected to the two side walls, located on the placing table, of the base; through cooperative arrangement of the placement table, the moving plate, a pressure sensor and other structures, during use, a spring is placed on the placement table, the two ends of the spring are connected with the placement table and a moving block through a clamping assembly, then numerical values of the pressure sensor and a displacement sensor are set, and then a driving assembly is started to enable the moving plate to ascend and descend; and when the pressure sensor or the displacement sensor reaches a set value, the driving assembly is controlled to be closed, the spring is prevented from being continuously pulled and pressed, and the problem that the spring is broken and damaged due to the fact that the spring is continuously pulled and pressed is avoided as much as possible.

Description

Technical Field

[0001] This application relates to the field of spring testing technology, and in particular to a digital display spring tension and compression testing machine. Background Technology

[0002] Springs are an important component in industrial systems, used extensively and in a wide variety. During the manufacturing process, springs need to undergo performance testing to check whether their performance meets requirements. Spring tension and compression testing machines are specialized instruments for testing the deformation and load-response characteristics of tensile and compressive springs. Sensors input the tensile or compressive force values ​​of the spring when it is stretched or compressed to that deformation into a computer. The computer calculates the spring's elastic coefficient, applies pressure to the spring using tension and compression clamps to deform it and generate elastic force, and then measures the elastic force of the spring using a measuring mechanism.

[0003] Announcement No. CN209878635U describes a tension / compression spring testing machine, comprising a base, two symmetrically arranged lead screws vertically rotatably connected to the base, a sliding frame threaded onto the lead screws, a drive mechanism for driving the lead screws to rotate inside the base, a first fixing member for fixing the spring on the base, a second fixing member for fixing the spring on the sliding frame corresponding to the first fixing member, a tension space between the sliding frame and the base, and partitions for isolating the tension space vertically provided on the base on both sides of the sliding frame.

[0004] One of the aforementioned tension and compression spring testing machines uses a first and a second fixing component to fix both ends of the spring between the base and the sliding frame. The spring is then tensioned or compressed by moving the sliding frame. However, the tension and compression force on the spring cannot be set. Once the tension and compression test of the spring is reached, the spring will continue to be tensioned or compressed, leading to breakage and damage. Utility Model Content

[0005] The purpose of this invention is to solve or at least alleviate the problem of an existing tension and compression spring testing machine. The spring is fixed at both ends between the base and the sliding frame by the first and second fixing parts, and then the spring is tensioned and compressed by moving the sliding frame. However, it is impossible to set the tension and compression force of the spring. After the tension and compression test of the spring is reached, the spring will continue to be tensioned and compressed, resulting in breakage and damage.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A digital display spring tension and compression testing machine includes a base, on which a tension and compression assembly for performing tension and compression tests on springs is provided. The tension and compression assembly includes a placement platform fixedly connected to the upper surface of the base. Vertical support plates are fixedly connected to the two side walls of the base located on the placement platform. Guide grooves are formed on the opposite side walls of the two support plates. A movable plate is provided between the two support plates, with its two ends slidably disposed in the guide grooves. A drive assembly for raising and lowering the movable plate is provided in the base. A pressure sensor for controlling the closing of the drive assembly is installed in the placement platform. A displacement sensor for controlling the closing of the drive assembly is installed in the movable plate. A clamping assembly is provided on the placement platform and the movable plate. A display screen for displaying the values ​​of the pressure sensor and the displacement sensor is installed on one side wall of the support plate.

[0008] By adopting the above technical solution, when using the spring, place it on the placement platform, and connect both ends of the spring to the placement platform and the moving block respectively through the clamping assembly. Then, set the values ​​of the pressure sensor and the displacement sensor, and then start the drive assembly to raise and lower the moving plate to perform a tension and compression test on the spring. When the pressure sensor or the displacement sensor reaches the set value, control the drive assembly to shut down to prevent the spring from being stretched or compressed further, thus avoiding the problem of breakage and damage caused by continued stretching and compression of the spring.

[0009] Optionally, the drive assembly includes a stepper motor fixedly connected inside the base, a gear reducer fixedly connected to the output end of the stepper motor, a lead screw fixedly connected to the end of the gear reducer away from the stepper motor, a fixed plate fixedly connected to the top of the two support plates, the end of the lead screw away from the gear reducer passing through the base and the fixed plate and forming a rotatable connection, the movable plate being sleeved on the lead screw and forming a threaded connection, and the pressure sensor and the displacement sensor being electrically connected to the stepper motor.

[0010] By adopting the above technical solution, the stepper motor is started to rotate in both directions, which causes the gear reducer to drive the lead screw to rotate in both directions. This allows the moving plate to move up and down under the action of the guide groove, thus applying tension and compression to the spring.

[0011] Optionally, the clamping assembly includes two sets of cylinders, which are respectively fixedly connected to the side wall of the placement platform opposite to the moving plate. Each set of cylinders has two cylinders and the output end is fixedly connected to a clamping plate. The two clamping plates are arranged in parallel.

[0012] By adopting the above technical solution, one end of the spring is placed on the placement platform, and then the lower surface of the moving plate is made to fit against the other end of the spring. By activating two sets of cylinders, each pair of clamping plates is brought closer together to clamp both ends of the spring. This fixes both ends of the spring to the placement platform and the moving plate respectively, allowing the moving plate to pull and compress the spring.

[0013] Optionally, each of the two clamping plates has a clamping plate fixedly connected to one of its opposite sidewalls for securing the spring.

[0014] By adopting the above technical solution, when clamping the two ends of the spring, inserting the clamping plate into the gap of the spring side wall can prevent the spring from being pulled out of the two clamping plates when stretching the spring, thus improving the clamping effect of the spring.

[0015] Optionally, each guide groove is provided with a guide rod, and the two ends of the guide rod are fixedly connected to the upper and lower side walls of the guide groove, respectively. The movable plate is located at one end of the guide groove and is respectively sleeved on the guide rod.

[0016] By adopting the above technical solutions, the stability of the moving plate's lifting and lowering can be improved and the amplitude of the moving plate's swaying can be reduced through the guide rod.

[0017] Optionally, a protective cover is installed on the upper surface of the base, and the tension / compression assembly is located inside the protective cover.

[0018] By adopting the above technical solutions, when the spring is stretched or compressed, the protective cover is installed on the base to cover the stretching and compression components, which can prevent the spring from breaking and popping out during the stretching and compression process, thus preventing accidental injury to personnel.

[0019] Optionally, the base has multiple heat dissipation holes on one side wall, and a dustproof mesh is fixedly connected inside the heat dissipation holes.

[0020] By adopting the above technical solutions, the stepper motor can be cooled through the heat dissipation holes, preventing heat from accumulating inside the base and damaging the stepper motor. At the same time, the dustproof net can prevent dust and other debris from entering the base.

[0021] In summary, the beneficial effects of this application are as follows:

[0022] 1. This application utilizes the coordinated arrangement of structures such as a placement platform, a movable plate, and a pressure sensor. During use, the spring is placed on the placement platform, and the clamping assembly connects both ends of the spring to the placement platform and the movable block, respectively. Then, the values ​​of the pressure sensor and the displacement sensor are set, and the drive assembly is activated to raise and lower the movable plate to perform a tension and compression test on the spring. When the pressure sensor or the displacement sensor reaches the set value, the drive assembly is controlled to shut down to prevent further tension and compression of the spring, thus minimizing the risk of breakage or damage caused by continued tension and compression.

[0023] 2. By placing one end of the spring on the placement platform and then aligning the lower surface of the moving plate with the other end of the spring, the two sets of cylinders are activated to bring each pair of clamping plates closer together, thus clamping both ends of the spring. This fixes both ends of the spring to the placement platform and the moving plate respectively, allowing the moving plate to apply tension and compression to the spring. Simultaneously, when clamping both ends of the spring, inserting the clamping plate into the gap on the side wall of the spring prevents the spring from being pulled out from between the two clamping plates when stretching it, thereby improving the clamping effect on the spring. Attached Figure Description

[0024] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0025] Figure 2 This is a schematic diagram of the internal structure of the base of this utility model;

[0026] Figure 3 For the utility model Figure 1 Enlarged structural diagram of region A in the middle;

[0027] Figure 4 For the utility model Figure 1 A magnified structural diagram of region B in the middle.

[0028] Explanation of reference numerals in the attached drawings: 1. Base; 2. Placement platform; 3. Support plate; 4. Guide groove; 5. Moving plate; 6. Pressure sensor; 7. Displacement sensor; 8. Stepper motor; 9. Gear reducer; 10. Lead screw; 11. Fixing plate; 12. Cylinder; 13. Clamping plate; 14. Carding plate; 15. Guide rod; 16. Protective cover; 17. Heat dissipation hole; 18. Dustproof net; 19. Display screen. Detailed Implementation

[0029] The following is combined with Figure 1-4 This application is described in further detail.

[0030] Please see Figure 1-3 A digital display spring tension and compression testing machine includes a base 1, on which a tension and compression assembly for performing tension and compression tests on springs is provided. The tension and compression assembly includes a placement platform 2, a support plate 3, a guide groove 4, a moving plate 5, a pressure sensor 6, and a displacement sensor 7.

[0031] The placement platform 2 is fixedly connected to the upper surface of the base 1 for placing the spring. Two support plates 3 are provided and fixedly connected to the two side walls of the placement platform 2 on the base 1. The two support plates 3 are vertically arranged. Two guide grooves 4 are provided and are respectively opened on the opposite side walls of the two support plates 3. The moving plate 5 is arranged between the two support plates 3 and is located directly above the placement platform 2. The two ends of the moving plate 5 are slidably arranged in the guide grooves 4. The base 1 is provided with a drive assembly for raising and lowering the moving plate 5. The pressure sensor 6 is installed in the placement platform 2 to control the drive assembly to close. The displacement sensor 7 is installed in the moving plate 5 to control the drive assembly to close. The placement platform 2 and the moving plate 5 are provided with clamping assemblies for connecting the two ends of the spring to the placement platform 2 and the moving plate 5 respectively. A display screen 19 is installed on one side wall of the support plate 3 to display the values ​​of the pressure sensor 6 and the displacement sensor 7, so that the operator can easily observe the values ​​of the pressure sensor 6 and the displacement sensor 7.

[0032] In use, place the spring on the placement platform 2, and connect both ends of the spring to the placement platform 2 and the moving block 5 respectively through the clamping assembly. Then set the values ​​of the pressure sensor 6 and the displacement sensor 7, and then start the drive assembly to raise and lower the moving plate 5 to perform a tension and compression test on the spring. When the pressure sensor 6 or the displacement sensor 7 reaches the set value, control the drive assembly to shut down to prevent the spring from being stretched or compressed further, thus avoiding the problem of breakage and damage caused by the spring being stretched or compressed further.

[0033] Reference Figure 1 and Figure 2 The drive assembly includes a stepper motor 8 fixedly connected inside the base 1. A gear reducer 9 is fixedly connected to the output end of the stepper motor 8. A lead screw 10 is fixedly connected to the end of the gear reducer 9 away from the stepper motor 8. The gear reducer 9 can convert the high speed and low torque of the stepper motor 8 into a low speed and high torque output, thereby meeting the needs of the working machinery. A fixed plate 11 is fixedly connected to the top of the two support plates 3. The end of the lead screw 10 away from the gear reducer 9 passes through the base 1 and the fixed plate 11 and forms a rotatable connection. A moving plate 5 is sleeved on the lead screw 10 and forms a threaded connection. A pressure sensor 6 and a displacement sensor 7 are electrically connected to the stepper motor 8. By starting the stepper motor 8 to rotate forward and backward, the gear reducer 9 can drive the lead screw 10 to rotate forward and backward, and the moving plate 5 can move up and down under the action of the guide groove 4, thus pulling and compressing the spring.

[0034] Reference Figure 1 and Figure 3The clamping assembly includes two sets of cylinders 12, which are fixedly connected to the side wall of the placement platform 2 opposite to the moving plate 5. Each set of cylinders 12 has two cylinders and the output end is fixedly connected to a clamping plate 13. The two clamping plates 13 are arranged in parallel. By placing one end of the spring on the placement platform 2 and then making the lower surface of the moving plate 5 fit against the other end of the spring, the two sets of cylinders 12 are activated to bring each pair of clamping plates 13 closer to each other, clamping both ends of the spring. The two ends of the spring can be fixed to the placement platform 2 and the moving plate 5 respectively, so that the moving plate 5 can pull and compress the spring.

[0035] Reference Figure 3 Each of the two clamping plates 13 has a clamping plate 14 fixedly connected to one side wall opposite to the spring. When clamping the two ends of the spring, the clamping plate 13 is inserted into the gap of the spring side wall to prevent the spring from being pulled out from the two clamping plates 12 when the spring is stretched, thus improving the clamping effect of the spring.

[0036] Reference Figure 1 , Figure 2 and Figure 3 Guide rods 15 are provided in the guide groove 4. The two ends of the guide rods 15 are fixedly connected to the upper and lower side walls of the guide groove 4 respectively. The moving plate 5 is located at one end of the guide groove 4 and is sleeved on the guide rods 15. The guide rods 15 can improve the stability of the moving plate 5 in raising and lowering and reduce the amplitude of the moving plate 5 swaying.

[0037] Reference Figure 1 A protective cover 16 is installed on the upper surface of the base 1. Insert blocks are fixedly connected to the four sides of the upper surface of the base 1. The bottom end of the protective cover 16 is inserted into the insert blocks respectively, which makes it easy to remove the protective cover 16 from the base 1 and install it. The protective cover 16 is made of transparent acrylic material, which makes it easy for personnel to observe the tension and compression state of the spring. The tension and compression component is located inside the protective cover 16. When the spring is tensioned or compressed, by installing the protective cover 16 on the base 1 to cover the tension and compression component, it can prevent the spring from breaking and popping out during tension and compression, which could accidentally injure personnel.

[0038] Reference Figure 1 and Figure 4 Multiple heat dissipation holes 17 are provided on one side wall of the base 1. A dustproof net 18 is fixedly connected inside the heat dissipation hole 17. The heat dissipation hole 17 can dissipate heat from the stepper motor 8 and prevent heat from accumulating inside the base 1 and damaging the stepper motor 8. At the same time, the dustproof net 18 can prevent dust and other debris from entering the interior of the base 1.

[0039] The implementation principle of this application is as follows: In use, the user first places the spring on the placement platform 2, then makes the lower surface of the moving plate 5 fit against the other end of the spring. By activating the two sets of cylinders 12, each pair of clamping plates 13 moves closer together, clamping both ends of the spring. This fixes both ends of the spring to the placement platform 2 and the moving plate 5 respectively. Simultaneously, when clamping the ends of the spring, the clamping plates 13 are inserted into the gaps in the side walls of the spring, preventing the spring from being pulled out from between the two clamping plates 12 when the spring is stretched, thus improving the clamping effect. When stretching or compressing the spring, the protective cover 16 is installed on the base 1, and the stretching / compression assembly... Covering the spring during tension and compression prevents accidental injury if it breaks and springs back during the process. Then, the values ​​of pressure sensor 6 and displacement sensor 7 are set. Starting stepper motor 8 and rotating it in both directions causes gear reducer 9 to drive lead screw 10 in both directions, allowing moving plate 5 to move up and down under the action of guide groove 4, thus tensioning and compressing the spring. When the tension and compression test of the spring reaches the set values ​​of pressure sensor 6 or displacement sensor 7, stepper motor 8 is shut off to prevent further tension and compression of the spring, thus minimizing the risk of breakage and damage.

[0040] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A digital display spring tension and compression testing machine, comprising a base (1), wherein the base (1) is provided with a tension and compression assembly for performing tension and compression tests on springs, characterized in that: The tension-compression assembly includes a placement platform (2) fixedly connected to the upper surface of the base (1). Vertical support plates (3) are fixedly connected to the two side walls of the base (1) on both sides of the placement platform (2). Guide grooves (4) are provided on the opposite side walls of the two support plates (3). A movable plate (5) is provided between the two support plates (3). The two ends of the movable plate (5) are slidably disposed in the guide grooves (4). A drive assembly for raising and lowering the movable plate (5) is provided in the base (1). A pressure sensor (6) for controlling the closing of the drive assembly is installed in the placement platform (2). A displacement sensor (7) for controlling the closing of the drive assembly is installed in the movable plate (5). Clamping assemblies are provided on the placement platform (2) and the movable plate (5). A display screen (19) for displaying the values ​​of the pressure sensor (6) and the displacement sensor (7) is installed on one side wall of the support plate (3).

2. The digital display spring tension / compression testing machine according to claim 1, characterized in that: The drive assembly includes a stepper motor (8) fixedly connected inside the base (1), a gear reducer (9) fixedly connected to the output end of the stepper motor (8), and a lead screw (10) fixedly connected to the end of the gear reducer (9) away from the stepper motor (8).

3. The digital display spring tension / compression testing machine according to claim 1, characterized in that: The top ends of the two support plates (3) are fixedly connected to the fixing plate (11). The end of the lead screw (10) away from the gear reducer (9) passes through the base (1) and the fixing plate (11) and forms a rotatable connection. The moving plate (5) is sleeved on the lead screw (10) and forms a threaded connection. The pressure sensor (6) and the displacement sensor (7) are electrically connected to the stepper motor (8).

4. The digital display spring tension / compression testing machine according to claim 1, characterized in that: The clamping assembly includes two sets of cylinders (12). The two sets of cylinders (12) are respectively fixedly connected to the side wall of the placement platform (2) opposite to the moving plate (5). Each set of cylinders (12) has two cylinders and the output end is fixedly connected to a clamping plate (13). The two clamping plates (13) are arranged in parallel.

5. A digital display spring tension / compression testing machine according to claim 1, characterized in that: Each of the two clamps (13) has a clamp (14) fixedly connected to one of their opposite sidewalls for securing the spring.

6. A digital display spring tension / compression testing machine according to claim 2, characterized in that: Each guide groove (4) is provided with a guide rod (15), and the two ends of the guide rod (15) are fixedly connected to the upper and lower side walls of the guide groove (4) respectively. The movable plate (5) is located at one end of the guide groove (4) and is respectively sleeved on the guide rod (15).

7. A digital display spring tension / compression testing machine according to claim 6, characterized in that: A protective cover (16) is installed on the upper surface of the base (1), and the tensioning assembly is located inside the protective cover (16).

8. A digital display spring tension / compression testing machine according to claim 6, characterized in that: The base (1) has multiple heat dissipation holes (17) on one side wall, and a dustproof net (18) is fixedly connected inside the heat dissipation hole (17).

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