Expansion force testing device

Abstract

The utility model relates to the technical field of expansionary force detection, and provides an expansionary force testing device which comprises a force measuring frame and two sets of force measuring assemblies, the force measuring frame is integrally in a four-frame shape, the force measuring assemblies are symmetrically installed in the center of a short frame body of the force measuring frame, and the central axis of each force measuring assembly is parallel to a long frame body of the force measuring frame. The force measuring assembly comprises a force measuring rod, a force measuring spring and a movable seat, the inner end of the force measuring rod is provided with a loading bulge which is integrally connected with the force measuring rod, the force measuring spring is sleeved on the force measuring rod between the loading bulge and the short frame body of the force measuring frame, and the movable seat is rotatably assembled on the inner end of the force measuring rod along a vertical surface. And the force measuring rod axially moves. The expansion force can be efficiently detected by a single person, the problem of uneven stress of the force measuring plate is solved, the measuring stability and safety are ensured, meanwhile, the manufacturing and using cost is reduced through a simple structure, and the expansion force measuring device has remarkable practical value and popularization and application prospects.

Description

Technical Field

[0001] This application relates to the field of expansion force detection technology, and in particular to an expansion force testing device. Background Technology

[0002] Hydraulic expanders are widely used tools in industrial fields, and their expansion force is one of the key technical indicators for measuring their performance. Traditional methods for testing expansion force typically involve using a computer-controlled electronic universal testing machine. The specific operation is as follows: first, the hydraulic expander is expanded to a certain opening distance; then, the upper and lower expansion bodies of the expander are placed on the working end of the universal testing machine, and the expansion force is measured through a sensing device at the working end.

[0003] However, existing testing methods have several problems. First, the operation requires multiple people to work together, resulting in low testing efficiency and making it difficult to meet the needs of large-scale production or rapid testing. Second, the traditional expansion seat is a fixed structure, which leads to uneven force distribution during force measurement and is prone to slippage. This not only affects the accuracy of the measurement but may also pose a threat to the safety of the equipment, products, and operators. In addition, using a computer-controlled electronic universal testing machine for testing results in high equipment purchase costs, complex operation, and high maintenance costs, increasing the burden on enterprises.

[0004] In summary, existing methods for detecting the expansion force of hydraulic expanders have significant shortcomings in terms of efficiency, safety, and cost. There is an urgent need for an improved detection technology to enhance detection efficiency, ensure operational safety, and reduce equipment operating costs. Utility Model Content

[0005] In view of this, in order to overcome the shortcomings of the prior art, this application aims to provide an expansion force testing device.

[0006] This application provides an expansion force testing device, which includes a force measuring frame and two sets of force measuring components. The force measuring frame is generally square-shaped, and the force measuring components are symmetrically installed at the center of the short side of the force measuring frame. The central axis of the force measuring components is parallel to the long side of the force measuring frame. The force measuring components include a force measuring rod, a force measuring spring, and a movable seat. The inner end of the force measuring rod is provided with an integrally connected loading protrusion. The force measuring spring is sleeved on the force measuring rod between the loading protrusion and the short side of the force measuring frame. The movable seat is rotatably mounted on the inner end of the force measuring rod along the vertical plane. When the expansion force of the expander is tested, the force measuring rod moves axially.

[0007] Optionally, in the expansion force testing device of this application, a first assembly through hole is provided at the center position of the short frame of the force measuring frame.

[0008] Optionally, in the expansion force testing device of this application, a reinforcing frame is provided on the outer side of the short frame, and a second mounting through hole is provided on the reinforcing frame, which is coaxial with the first mounting through hole.

[0009] Optionally, in the expansion force testing device of this application, the force measuring rod is coaxially assembled in the first assembly through hole and the second assembly through hole, and the outer end of the force measuring rod is provided with a first limiting hole and a limiting pin is provided in the limiting hole. When the force measuring rod moves axially to the inside of the force measuring frame, the axial limitation of the force measuring rod is achieved by the reinforcing frame blocking the limiting pin.

[0010] Optionally, in the expansion force testing device of this application, copper sleeves are respectively provided between the first assembly through hole and the force measuring rod and between the second assembly through hole and the force measuring rod.

[0011] Optionally, in the expansion force testing device of this application, the inner end of the force measuring rod is provided with a through-groove along the axial direction, and the first positioning hole is perpendicular to the assembly groove and passes through the force measuring rod.

[0012] Optionally, in the expansion force testing device of this application, the movable seat is composed of an integrally connected connecting part and a clamping part. The connecting part is integrally sheet-like, and a second positioning hole is provided on the connecting part. The second positioning hole matches the first positioning hole provided on the inner end of the force measuring rod.

[0013] Optionally, in the expansion force testing device of this application, the connecting part of the movable seat is set in the assembly groove at the inner end of the force measuring rod, and a positioning pin is set in the first positioning hole and the second positioning hole on the same axis, so that the movable seat can rotate along the positioning pin.

[0014] Optionally, in the expansion force testing device of this application, the positioning pin is composed of an integrally connected positioning protrusion and a positioning pin body. The outer diameter of the positioning protrusion is larger than the inner diameter of the first positioning hole at the inner end of the force measuring rod. A third positioning hole is provided on the positioning pin body, and a fixing pin is provided in the third positioning hole.

[0015] Optionally, in the expansion force testing device of this application, the clamping part of the movable seat is block-shaped.

[0016] The expansion force testing device of this application, through its comprehensive structural design, enables a single person to complete the expansion force test, significantly improving measurement efficiency and reducing labor costs and operation time. Simultaneously, the design of a rotatable base effectively solves the problem of uneven force distribution on the force measuring plate, ensuring the stability and safety of the measurement process and avoiding potential equipment damage or personal injury due to uneven force distribution. The expansion force testing device of this application has a simple structure, low manufacturing process requirements, and is easy to use and operate, thereby significantly reducing manufacturing and usage costs, improving economic efficiency, and possessing significant practical value and promising prospects for widespread application. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of an expansion force testing device according to an embodiment of this application;

[0019] Figure 2 This is an example diagram of the force measuring frame of an expansion force testing device according to an embodiment of this application;

[0020] Figure 3 This is a structural example diagram of the force measuring rod of an expansion force testing device according to an embodiment of this application;

[0021] Figure 4 This is another structural example diagram of a tension testing device according to an embodiment of this application;

[0022] Figure 5 This is another structural example diagram of a tension testing device according to an embodiment of this application;

[0023] Figure 6 This is a structural example diagram of the movable seat of a tension testing device according to an embodiment of this application;

[0024] Figure 7 This is a partial structural example diagram of a tension testing device according to an embodiment of this application;

[0025] Figure 8 This is a structural example diagram of a positioning pin in a tension testing device according to an embodiment of this application;

[0026] Figure 9 This is an example diagram illustrating the application state of the tension testing device according to an embodiment of this application;

[0027] Figure 10 This is an example diagram of another application state of the tension testing device according to an embodiment of this application;

[0028] Figure 11 This is an example diagram illustrating the simulation calculation of spring parameters for a force-measuring spring according to an embodiment of this application;

[0029] Figure 12 This is another example diagram illustrating the simulation calculation of the spring parameters of the force-measuring spring according to an embodiment of this application;

[0030] Figure 13 This is an example diagram of the force-measuring frame according to an embodiment of this application;

[0031] Figure 14 This is another example diagram of force analysis of the force measuring frame according to an embodiment of this application;

[0032] In the figure, 1-force measuring frame, 2-force measuring component, 11-short side frame, 12-long side frame, 13-first mounting through hole, 14-reinforcing frame, 15-second mounting through hole, 21-force measuring rod, 22-force measuring spring, 23-movable seat, 211-loading protrusion, 212-first limiting hole, 213-assembly groove, 214-first positioning hole, 24-limiting pin, 25-copper sleeve, 231-connecting part, 232-clamping part, 233-second positioning hole, 26-positioning pin, 261-positioning protrusion, 262-positioning pin body, 263-third positioning hole, 27-fixing pin, 3-expander. Detailed Implementation

[0033] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0034] It should be noted that, in the absence of conflict, the following embodiments and features can be combined with each other; and, based on the embodiments of this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0035] It should be noted that various aspects of embodiments within the scope of the appended claims are described below. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this disclosure, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number of aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using structures and / or functionalities other than one or more of the aspects set forth herein.

[0036] Figure 1 This is a schematic diagram of the structure of an expansion force testing device according to an embodiment of this application, as shown below. Figure 1 As shown, the expansion force testing device of this embodiment includes a force measuring frame 1 and two sets of force measuring components 2. The force measuring frame 1 is generally square.

[0037] Figure 2 This is an example diagram of the force measuring frame of an expansion force testing device according to an embodiment of this application. Figure 2As shown, in this embodiment, a first mounting through hole 13 is provided at the center of the short side frame 11 of the force measuring frame 1. A reinforcing frame 14 is provided on the outer side of the short side frame 11, and a second mounting through hole 15 coaxial with the first mounting through hole 13 is provided on the reinforcing frame 14. In this embodiment, the reinforcing frame 14 is used to assist in supporting the force measuring rod 21, making the axially moving force measuring rod 21 more stable.

[0038] like Figure 1 and Figure 2 As shown, the force measuring component 2 is symmetrically installed at the center of the short side body 11 of the force measuring frame 1, and the central axis of the force measuring component 2 is parallel to the long side body 12 of the force measuring frame 1. As an optional example, the force measuring component 2 includes a force measuring rod 21, a force measuring spring 22, and a movable seat 23.

[0039] Figure 3 This is a structural example diagram of the force measuring rod of an expansion force testing device according to an embodiment of this application, as shown below. Figure 3 As shown, the inner end of the force measuring rod 21 is provided with an integrally connected loading protrusion 211, the outer end of the force measuring rod 21 is provided with a first limiting hole 212, the inner end of the force measuring rod 21 is provided with a through assembly groove 213 along the axial direction, and the first positioning hole 214 is perpendicular to the assembly groove 213 and passes through the force measuring rod 21.

[0040] like Figure 1 , Figure 2 and Figure 3 As shown, the force-measuring spring 22 is sleeved on the force-measuring rod 21 between the loading protrusion 211 and the short side frame 11 of the force-measuring frame 1. The movable seat 23 is rotatably mounted on the inner end of the force-measuring rod 21 along the vertical plane. When the expansion force test is performed, the force-measuring rod 21 moves axially to the outer end, compressing the force-measuring spring 22. The distance the force-measuring spring is compressed can be calculated to indirectly characterize the measured expansion force.

[0041] For example, in this embodiment, the force-measuring spring 22 is a cylindrical compression spring, which is a key component for measuring the expansion force. When subjected to expansion force, the force-measuring spring 22 contracts and deforms, simultaneously generating a resistance force linearly related to the compression distance. The force-measuring spring 22 involves design parameters such as material, wire diameter, center diameter, effective number of coils, total spring length, working height, and required force. The stiffness k of the force-measuring spring 22 multiplied by the working stroke equals the working force of the force-measuring spring 22. By selecting the spring material and diameter, the stiffness of the spring is calculated and determined. Based on the working stroke of the compression spring, the expansion force is indirectly measured. For example, in actual operation, a scale line is set on the long side frame 12 of the force-measuring frame 1. If the expansion device 3 expands and compresses the force-measuring spring 22 by a distance exceeding the scale line distance, it indicates that the expansion force of the expansion device 3 is qualified. After the force measuring spring 22 is manufactured, the force value of the force measuring spring 22 is tested on the force measuring machine to compress the force measuring spring 22 a certain distance. The compression distance L of the force measuring spring 22 required for the expansion force is verified and determined. Then, lines are engraved on the top and side surfaces of the force measuring frame 1 as the boundary of the force measurement. When operating the expander to test the expansion force, the force measuring spring 22 is compressed to a distance ≥ L, and the expansion force measurement can be completed.

[0042] Figure 4 This is another structural example diagram of a tension testing device according to an embodiment of this application, as shown below. Figure 1 , 2 As shown in Figures 3 and 4, in this embodiment, the force measuring rod 21 is coaxially assembled in the first assembly through hole 13 and the second assembly through hole 15, and a limiting pin 24 is provided in the first limiting hole 212. When the force measuring rod 21 moves axially towards the inside of the force measuring frame 1, the axial limitation of the force measuring rod 21 is achieved by blocking the limiting pin 24 through the reinforcing frame 14.

[0043] Figure 5 This is another structural example diagram of a tension testing device according to an embodiment of this application, as shown below. Figure 5 As shown, in practical applications, copper sleeves 25 are respectively installed between the first mounting through hole 13 and the force measuring rod 21, and between the second mounting through hole 15 and the force measuring rod 21. The copper sleeves 25 can reduce the sliding resistance when the force measuring rod 21 moves axially. In practical applications, scale lines are set on the force measuring rod 21 to mark the distance the force measuring rod moves. The measured tension is calculated based on the distance moved.

[0044] Figure 6 This is a structural example diagram of the movable seat of a tension testing device according to an embodiment of this application, as shown below. Figure 6 As shown, in this embodiment, the movable seat 23 consists of an integrally connected connecting part 231 and a clamping part 232. The connecting part 231 is integrally sheet-like, and a second positioning hole 233 is provided on the connecting part 231. This second positioning hole 233 matches the first positioning hole 214 provided on the inner end of the force measuring rod 21. The clamping part 232 of the movable seat 23 is block-shaped.

[0045] Figure 7 This is a partial structural example diagram of a tension testing device according to an embodiment of this application. Figure 8 This is a structural example diagram of a positioning pin in a tension testing device according to an embodiment of this application. Figures 1 to 8 As shown, the connecting part 231 of the movable seat 23 is disposed in the assembly groove 213 at the inner end of the force measuring rod 21. A positioning pin 26 is disposed in the first positioning hole 214 and the second positioning hole 233, which are coaxial. The movable seat 23 can rotate along the positioning pin 26. The positioning pin 26 is composed of a positioning protrusion 261 and a positioning pin body 262 integrally connected. The outer diameter of the positioning protrusion 261 is larger than the inner diameter of the first positioning hole 214 at the inner end of the force measuring rod 21. A third positioning hole 263 is disposed on the positioning pin body 262, and a fixing pin 27 is disposed in the third positioning hole 263.

[0046] Figure 9 This is an example diagram illustrating the application state of the tension testing device according to an embodiment of this application. Figure 10 This is an example diagram of another application state of the tension testing device according to an embodiment of this application. For example... Figure 9 and Figure 10 As shown, when measuring the expansion force of the expander 3, the force angle of the expander 3 can be kept perpendicular to the bottom surface of the clamping part 232 of the movable seat 23, so that the entire expansion process will not slip or jam due to the change of the force angle.

[0047] The following provides a more detailed description of the expansion force testing device in a specific scenario.

[0048] In this scenario example, the parameters of the force measuring spring 22 are shown in Table 1 below.

[0049] Table 1

[0050]

[0051] The existing operating conditions are: installation height 210, force measuring rod diameter 30, required expansion measuring force value 1.4t. According to Table 1 above, the parameters of the force measuring spring 22 can be calculated as follows:

[0052] Inner diameter D1=32; Mean diameter D2=42.5; Free height H=210; Heave ratio C=4.05; Slenderness ratio of compression spring b=4.9; Effective number of coils n=10; Total number of coils n1=11.5; Working deformation λn=43.46; Working height H1=166.54; Pitch p=19.95; Axial spacing=9.45; Unfolded length L=1468.7; Helix angle α=8.47°.

[0053] The material parameters of the force measuring spring 22 are: oil-quenched and tempered hard steel wire; rigidity modulus: 81370 MPa.

[0054] Based on the above parameter results, a simulation calculation was performed on the force-measuring spring 22. Figure 11 This is an example diagram illustrating the simulation calculation of spring parameters for a force-measuring spring according to an embodiment of this application; Figure 12 This is another example diagram of the simulation calculation of the spring parameters of the force measuring spring according to an embodiment of this application.

[0055] Through such Figure 11 and Figure 12 Simulation calculations using the designed spring parameters show that a single force-measuring spring can withstand a pressure of 700 kg, while a double force-measuring spring 22 can withstand a pressure of 1.4 t.

[0056] Then, in this scenario, a force analysis is performed on the force measuring frame 1 based on the forces acting upon it. Figure 13 This is an example diagram of the force-measuring frame according to an embodiment of this application. Figure 14 This is another example diagram of force analysis of a force measuring frame according to an embodiment of this application. (See diagram below.) Figure 13 and Figure 14 As shown, in this scenario, the force measuring frame 1, which is welded from Q235A material, has a safety factor greater than 1 when subjected to a maximum load of 700kg, indicating that the structure is relatively stable.

[0057] Based on the above design and analysis, the expansion force testing device of this application is manufactured and assembled. When conducting the expansion force test, the expansion force testing device is first vertically fixed on the workbench, the expander 3 is horizontally raised with a pad, and the expander body of the expander 3 is directly facing the center of the two movable seats 23. The expander 3 is operated, the movable seats 23 expand and push the force measuring rod 21 to slide, compressing the force measuring spring 22 to reach the set distance, and the expansion force measurement is completed.

[0058] The expansion force testing device of this application, through its comprehensive structural design, enables a single person to complete the expansion force test, significantly improving measurement efficiency and reducing labor costs and operation time. Simultaneously, the design of a rotatable base effectively solves the problem of uneven force distribution on the force measuring plate, ensuring the stability and safety of the measurement process and avoiding potential equipment damage or personal injury due to uneven force distribution. The expansion force testing device of this application has a simple structure, low manufacturing process requirements, and is easy to use and operate, thereby significantly reducing manufacturing and usage costs, improving economic efficiency, and possessing significant practical value and promising prospects for widespread application.

[0059] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A device for testing expansion force, characterized in that, The device includes a force-measuring frame and two sets of force-measuring components. The force-measuring frame is generally square-shaped. The force-measuring components are symmetrically installed at the center of the short side of the force-measuring frame. The central axis of the force-measuring components is parallel to the long side of the force-measuring frame. The force-measuring components include a force-measuring rod, a force-measuring spring, and a movable seat. The inner end of the force-measuring rod is provided with an integrally connected loading protrusion. The force-measuring spring is sleeved on the force-measuring rod between the loading protrusion and the short side of the force-measuring frame. The movable seat is rotatably mounted on the inner end of the force-measuring rod along the vertical plane. When the expansion force of the expander is tested, the force-measuring rod moves axially.

2. The expansion force testing device according to claim 1, characterized in that, The first assembly through hole is set at the center of the short side frame of the force measuring frame.

3. The expansion force testing device according to claim 2, characterized in that, A reinforcing frame is provided on the outer side of the short frame, and a second mounting through hole is provided on the reinforcing frame, which is coaxial with the first mounting through hole.

4. The expansion force testing device according to claim 3, characterized in that, The force measuring rod is coaxially assembled in the first and second assembly through holes. The outer end of the force measuring rod is provided with a first limiting hole, and a limiting pin is provided in the limiting hole. When the force measuring rod moves axially to the inside of the force measuring frame, the axial limitation of the force measuring rod is achieved by the reinforcing frame blocking the limiting pin.

5. The expansion force testing device according to claim 3, characterized in that, Copper sleeves are respectively installed between the first assembly through hole and the force measuring rod, and between the second assembly through hole and the force measuring rod.

6. The expansion force testing device according to claim 1, characterized in that, The inner end of the force measuring rod is provided with a through-groove along the axial direction, and the first positioning hole is perpendicular to the assembly groove and passes through the force measuring rod.

7. The expansion force testing device according to claim 6, characterized in that, The movable seat consists of an integrally connected connecting part and a clamping part. The connecting part is integrally sheet-like, and a second positioning hole is provided on the connecting part. The second positioning hole matches the first positioning hole provided on the inner end of the force measuring rod.

8. The expansion force testing device according to claim 7, characterized in that, The connecting part of the movable seat is set in the assembly groove at the inner end of the force measuring rod. A positioning pin is set in the first positioning hole and the second positioning hole, which are coaxial, and the movable seat can rotate along the positioning pin.

9. The expansion force testing device according to claim 8, characterized in that, The positioning pin consists of an integrally connected positioning protrusion and a positioning pin body. The outer diameter of the positioning protrusion is larger than the inner diameter of the first positioning hole at the inner end of the force measuring rod. A third positioning hole is provided on the positioning pin body, and a fixing pin is provided in the third positioning hole.

10. The expansion force testing device according to claim 7, characterized in that, The clamping part of the movable seat is block-shaped.

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