Overload protection device for testing machine and compression test equipment

Abstract

The utility model belongs to the technical field of material testing equipment, and particularly relates to an overload protection device for a testing machine and compression testing equipment, and the overload protection device comprises a shell, a first connecting module, a second connecting module, an elastic force storage part and an overload feedback module, the second connecting module is arranged at the bottom of the shell in a sliding manner; the elastic force storage piece is arranged in the shell and arranged between the first connecting module and the second connecting module in an abutting mode. The overload feedback module is arranged on the outer side of the bottom of the shell, and the second connecting module is in transmission connection with the overload feedback module through a transmission piece; the overload protection device has an overload protection function, and when a test force value exceeds a safety force value, the second connecting module slides upwards and enables the overload feedback module to trigger a limiting system or an emergency shutdown device, so that the test is interrupted in time, and the test machine or a tested material is prevented from being damaged due to overload.

Description

Technical Field

[0001] This utility model belongs to the technical field of material testing equipment, specifically relating to overload protection devices for testing machines and compression testing equipment. Background Technology

[0002] To measure the mechanical properties of materials under compressive loads, a testing machine consisting of a force sensor, pressure plate, electronic control system, and drive device is typically used. This machine can measure the compressive strength, yield strength, elastic modulus, and other properties of materials by applying gradually increasing compressive forces.

[0003] However, existing testing machines have significant deficiencies in overload protection. For example, when performing compression tests, the compression fixture is directly connected to the sensor. When performing compression tests on very thin samples such as films and polymer sheets, or samples with high rigidity such as bearings, human error or equipment malfunction can directly damage the force sensor or even the equipment due to the lack of overload protection. In addition, existing protection measures (such as alarms or emergency stop buttons) have insufficient response speed and cannot take timely measures when the force exceeds the sensor's range.

[0004] Therefore, there is an urgent need to develop more efficient and reliable overload protection schemes to protect the force sensors and testing equipment of compression testing equipment. Utility Model Content

[0005] In order to overcome the shortcomings of the prior art, this utility model provides an overload protection device for testing machines to solve the problem that the force sensor of the testing machine is often overloaded and damaged due to accidental factors such as human error or equipment malfunction, which may even damage the testing equipment.

[0006] One embodiment of this utility model provides an overload protection device for a testing machine, comprising a housing, a first connecting module, a second connecting module, an elastic energy storage component, and an overload feedback module.

[0007] The first connecting module is disposed on the top of the housing, and the second connecting module is slidably disposed on the bottom of the housing;

[0008] The elastic energy storage component is disposed inside the outer shell and abuts against the first connecting module and the second connecting module;

[0009] The overload feedback module is located on the bottom outer side of the housing, and the second connection module is connected to the overload feedback module via a transmission component.

[0010] The second connection module is configured to slide upwards and trigger the overload feedback module when the test force exceeds the safety force.

[0011] In one embodiment of this utility model, the first connecting module includes a connecting cover and a first connecting member. The connecting cover is threaded to the outer side of the outer shell. The first connecting member is disposed on the top of the connecting cover and is connected to the pressure sensor of the testing machine.

[0012] In one embodiment of this utility model, the second connecting module includes a sliding piston and a second connecting member. The sliding piston is slidably disposed inside the housing, the second connecting member is connected to the bottom of the sliding piston, and the second connecting member is connected to the compression fixture of the material being tested.

[0013] The elastic energy storage component elastically abuts the sliding piston against the bottom of the outer casing.

[0014] In one embodiment of this utility model, the elastic energy storage component is provided with a spring, which is used to store energy through compression deformation;

[0015] The elastic energy storage component absorbs the impact force and further compresses when the test force exceeds the safety force, thereby reducing the instantaneous impact force on the first connecting module.

[0016] In one embodiment of this utility model, an opening is provided on the bottom side of the outer shell, and the transmission component is hinged in the opening via a rotating shaft.

[0017] In one embodiment of this utility model, the transmission component is a balance lever, one end of which is in contact with the second connecting module, and the other end of which is in contact with the overload feedback module, for triggering the overload feedback module when the second connecting module moves upward.

[0018] In one embodiment of this utility model, the overload feedback module is electrically connected to the limit system or emergency stop device of the testing machine;

[0019] Alternatively, the overload feedback module is electrically connected to the alarm unit of the testing machine.

[0020] In one embodiment of this utility model, the overload feedback module includes a micro switch, which is connected to the balance lever;

[0021] Alternatively, the overload feedback module may include a limit switch connected to the balance lever.

[0022] In one embodiment of this utility model, the overload feedback module further includes a protective cover, which is disposed on the outside of the overload feedback module.

[0023] One embodiment of this utility model also discloses a compression testing device, including an overload protection device for the testing machine as described in any of the above embodiments.

[0024] The overload protection device for testing machines provided by this utility model can achieve the following technical effects:

[0025] 1. This utility model has an overload protection function: when the test force exceeds the safe force, the second connecting module slides upward and the overload feedback module triggers the limit system or emergency stop device to interrupt the test in time and avoid damage to the testing machine or the tested material due to overload.

[0026] 2. This utility model has the function of reducing instantaneous impact force: by placing the spring in the elastic storage component between the connecting cover and the sliding piston, when an overload occurs, the spring absorbs the impact force through compression deformation, reducing the instantaneous impact force on the first connecting module, thereby protecting the pressure sensor and connecting parts of the testing machine and extending the service life of the equipment.

[0027] 3. This utility model has the characteristics of stability and reliability: the balance lever in the transmission component is hinged to the opening at the bottom of the housing through the rotating shaft. One end of the balance lever is in contact with the sliding piston, and the other end is in contact with the micro switch or limit switch. When the sliding piston moves upward, the balance lever amplifies the motion through the lever principle, quickly triggering the micro switch or limit switch, ensuring the sensitivity and reliability of signal transmission, improving the safety of the testing machine, and adding a protective cover to the outside of the overload feedback module to prevent external interference or mechanical damage, and improve stability in complex environments. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0029] Figure 1 A schematic diagram showing the structure of the overload protection device for the testing machine according to this utility model;

[0030] Figure 2 This is a schematic diagram showing the structure of the first connecting module of this utility model;

[0031] Figure 3 This is a schematic diagram showing the structure of the second connecting module of this utility model.

[0032] The symbols in the attached image are explained as follows:

[0033] 1-Outer shell;

[0034] 2-First connecting module; 21-Connecting cover; 22-First connector;

[0035] 3-Second connecting module; 31-Sliding piston; 32-Second connecting piece;

[0036] 4-Elastic energy storage component;

[0037] 5-Overload feedback module;

[0038] 6-Transmission components;

[0039] 7- Rotating shaft;

[0040] 8-Micro switch;

[0041] 9-Protective cover. Detailed Implementation

[0042] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0043] Please refer to Figure 1 One embodiment of this utility model provides an overload protection device for a testing machine, including a housing 1, a first connecting module 2, a second connecting module 3, an elastic energy storage component 4, and an overload feedback module 5.

[0044] The first connecting module 2 is disposed on the top of the outer shell 1, and the second connecting module 3 is slidably disposed on the bottom of the outer shell 1;

[0045] The elastic energy storage component 4 is disposed inside the outer shell 1 and abuts against the first connecting module 2 and the second connecting module 3;

[0046] The overload feedback module 5 is located on the bottom outer side of the housing 1, and the second connection module 3 is connected to the overload feedback module 5 via the transmission component 6.

[0047] The second connection module 3 is configured to slide upward when the test force exceeds the safety force and trigger the overload feedback module 5.

[0048] In this embodiment, when the test force exceeds the safety force, the second connecting module 3 slides upward and triggers the overload feedback module 5 through the transmission component 6. The feedback module transmits the signal to the limit system or emergency stop device of the testing machine to interrupt the test in time and avoid damage to the testing machine or the tested material due to overload.

[0049] Please refer to Figure 2 In one embodiment of the present invention, the first connecting module 2 includes a connecting cover 21 and a first connecting member 22. The connecting cover 21 is threadedly connected to the outer side of the outer shell 1. The first connecting member 22 is disposed on the top of the connecting cover 21 and is connected to the pressure sensor of the testing machine.

[0050] In this embodiment, the first connecting module 2 is threadedly connected to the outer side of the outer shell 1 through the connecting cover 21, and the connecting cover 21 provides mechanical support to prevent the first connecting module 2 from loosening or shifting; and the first connecting member 22, the connecting cover 21, the elastic force storage member 4 inside the outer shell 1, and the second connecting module 3 form a whole, ensuring that the test force value of the compressed material during the test can be accurately transmitted to the pressure sensor.

[0051] Please refer to Figure 3 In one embodiment of the present invention, the second connecting module 3 includes a sliding piston 31 and a second connecting member 32. The sliding piston 31 is slidably disposed inside the outer shell 1, the second connecting member 32 is connected to the bottom of the sliding piston 31, and the second connecting member 32 is connected to the compression fixture of the material to be tested.

[0052] The elastic energy storage component 4 elastically abuts the sliding piston 31 against the bottom of the outer casing 1.

[0053] In this embodiment, when the test force value does not exceed the safety force value, the elastic storage component 4 keeps the sliding piston 31 in contact with the bottom of the outer shell 1 to ensure a stable connection; when the test force value exceeds the safety force value, the sliding piston 31 slides upward under the action of the force, triggering the overload feedback module 5 to achieve overload protection.

[0054] Please refer to Figures 1-3 In one embodiment of this utility model, the elastic energy storage component 4 is provided with a spring, which stores force through compression deformation to maintain a preset safety force value for the second connecting module 3;

[0055] The elastic energy storage component 4 absorbs the impact force and further compresses when the test force exceeds the safety force, thereby reducing the instantaneous impact force on the first connecting module 2.

[0056] In this embodiment, by placing the spring in the elastic storage component 4 between the connecting cover 21 and the sliding piston 31, when an overload occurs, the spring absorbs the impact force through compression deformation, reducing the instantaneous impact force on the first connecting module 2, thereby protecting the pressure sensor and connecting components of the testing machine and extending the service life of the equipment.

[0057] Please refer to Figures 1-3 In one embodiment of the present invention, the bottom side of the outer shell 1 is provided with an opening, and the transmission member 6 is hinged in the opening via a rotating shaft 7;

[0058] The transmission component 6 is a balance lever. One end of the balance lever is in contact with the second connecting module 3, and the other end of the balance lever is in contact with the overload feedback module 5, which is used to trigger the overload feedback module 5 when the second connecting module 3 moves upward.

[0059] In one embodiment of this utility model, the overload feedback module 5 includes a micro switch 8, which is connected to the balance lever;

[0060] Alternatively, the overload feedback module 5 may include a limit switch connected to the balance lever.

[0061] In one embodiment of the present invention, the overload feedback module 5 further includes a protective cover 9, which is disposed on the outside of the overload feedback module 5.

[0062] In this embodiment, the balance lever in the transmission component 6 is hinged to the opening at the bottom of the housing 1 via the rotating shaft 7. One end of the balance lever is in contact with the sliding piston 31, and the other end is in contact with the micro switch 8 or the limit switch. When the sliding piston 31 moves upward, the balance lever amplifies the movement through the lever principle, quickly triggering the micro switch 8 or the limit switch, ensuring the sensitivity and reliability of signal transmission, improving the safety of the testing machine, and adding a protective cover 9 to the outside of the overload feedback module 5 to prevent external interference or mechanical damage and improve stability in complex environments.

[0063] In one embodiment of this utility model, the overload feedback module 5 is electrically connected to the limit system or emergency stop device of the testing machine. When an overload occurs, the testing machine stops running immediately to avoid damage to the equipment due to overload and to ensure the safety of the operators and the equipment.

[0064] Alternatively, the overload feedback module 5 is electrically connected to the alarm unit of the testing machine, and issues an alarm in a timely manner when an overload occurs, reminding the operator to take appropriate measures.

[0065] One embodiment of this utility model also discloses a compression testing device, including an overload protection device for the testing machine as described in any of the above embodiments.

[0066] In this embodiment, before installation and use, the elastic storage element 4 (spring) is compressed to a certain deformation as needed, so that it stores force to match the required safety force value. Then, the first connecting module 2 of the device is connected to the force sensor of the test equipment, and the second connecting module 3 is connected to the compression fixture. At the same time, the overload feedback module 5 is connected in series with the limit system or other emergency stop protection device of the test equipment. During the test, when the test force exceeds the set safety force value, i.e., the stored force of the elastic storage element 4, the second connecting module 3 will move upward to deform the spring, slowing down the increase of the test force value and avoiding damage to the test equipment due to instantaneous impact. At the same time, it pushes the balance lever to rotate, triggering the micro switch 8 of the overload feedback module 5, so that the test equipment automatically stops running or shuts down by power failure, ultimately protecting the force sensor and the test equipment.

[0067] Furthermore, the overload protection device for this testing machine has been modularly designed. The connection module can be adapted to the specific specifications of the connectors of different testing equipment. The overload feedback module 5 can also be directly connected to the limit system of any testing equipment. The elastic storage component 4 can be adapted to different spring specifications and spring compression amounts according to different testing tonnage equipment. Each module is independent of the others and can be arbitrarily combined to meet different overload protection requirements.

[0068] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. An overload protection device for a testing machine, characterized in that, It includes a housing (1), a first connecting module (2), a second connecting module (3), an elastic energy storage component (4), and an overload feedback module (5): The first connecting module (2) is disposed on the top of the outer shell (1), and the second connecting module (3) is slidably disposed on the bottom of the outer shell (1); The elastic energy storage component (4) is disposed inside the outer shell (1) and is abutting between the first connecting module (2) and the second connecting module (3); The overload feedback module (5) is located on the bottom outer side of the housing (1), and the second connection module (3) is connected to the overload feedback module (5) via the transmission component (6). The second connection module (3) is configured to slide upward when the test force exceeds the safety force and trigger the overload feedback module (5).

2. The overload protection device for the testing machine as described in claim 1, characterized in that, The first connection module (2) includes a connection cover (21) and a first connector (22). The connection cover (21) is threaded to the outer side of the outer shell (1). The first connector (22) is located on the top of the connection cover (21) and is connected to the pressure sensor of the testing machine.

3. The overload protection device for the testing machine as described in claim 1, characterized in that, The second connection module (3) includes a sliding piston (31) and a second connector (32). The sliding piston (31) is slidably disposed inside the outer shell (1). The second connector (32) is connected to the bottom of the sliding piston (31) and is connected to the compression fixture of the material to be tested. The elastic energy storage component (4) elastically abuts the sliding piston (31) against the bottom of the outer shell (1).

4. The overload protection device for a testing machine as described in any one of claims 1-3, characterized in that, The elastic energy storage component (4) is provided with a spring, which is used to store energy through compression deformation; The elastic energy storage component (4) absorbs the impact force and further compresses when the test force exceeds the safety force, thereby reducing the instantaneous impact force on the first connecting module (2).

5. The overload protection device for the testing machine as described in claim 4, characterized in that, The bottom side of the outer casing (1) is provided with an opening, and the transmission component (6) is hinged in the opening via a rotating shaft (7).

6. The overload protection device for the testing machine as described in claim 5, characterized in that, The transmission component (6) is a balance lever. One end of the balance lever is in contact with the second connecting module (3), and the other end of the balance lever is in contact with the overload feedback module (5). It is used to trigger the overload feedback module (5) when the second connecting module (3) moves upward.

7. The overload protection device for the testing machine as described in claim 4, characterized in that, The overload feedback module (5) is electrically connected to the limit system or emergency stop device of the testing machine; Alternatively, the overload feedback module (5) is electrically connected to the alarm unit of the testing machine.

8. The overload protection device for a testing machine as described in claim 6, characterized in that, The overload feedback module (5) includes a micro switch (8), which is connected to the balance lever; Alternatively, the overload feedback module (5) may include a limit switch connected to the balance lever.

9. The overload protection device for a testing machine as described in claim 7, characterized in that, The overload feedback module (5) also includes a protective cover (9), which is disposed on the outside of the overload feedback module (5).

10. A compression testing apparatus, characterized in that, Includes the overload protection device for testing machines as described in any one of claims 1-9.

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