Engineering component internal force analyzer

Abstract

The invention belongs to the technical field of mechanical analysis, and provides an engineering component internal force analyzer, the engineering component internal force analyzer comprises a mandrel, a first magnetic attraction piece, a second magnetic attraction piece and a plurality of component modules, the mandrel comprises a first half shaft and a second half shaft, the first half shaft and the second half shaft are coaxially arranged in an equal diameter mode, and the first magnetic attraction piece and the second magnetic attraction piece are arranged on the mandrel. The second half shaft comprises an inner shaft and an outer shaft, a containing groove is formed in the end, facing the first half shaft, of the outer shaft, and the inner shaft is arranged in the containing groove in a sliding mode; the first magnetic attraction piece is arranged at the end, facing the second half shaft, of the first half shaft. The second magnetic attraction piece is arranged at the end, facing the first half shaft, of the second half shaft. A plurality of component modules are sequentially arranged on the outer shafts of the first half shaft and the second half shaft in a sleeving mode and abut against one another to form an engineering component model. The engineering component internal force analyzer provided by the invention can visually display a torsion angle, shear strain, tensile strain and bending strain.

Description

Technical Field

[0001] The invention belongs to the technical field of mechanical analysis, and in particular relates to an internal force analyzer for an engineering component. Background Art

[0002] The internal forces of engineering components usually refer to the bending moment and torque during bending and torsion, the shear force during shearing, and the axial force during tension and compression.

[0003] Currently, engineering components are usually simulated by models, such as torsion, bending, tension, compression, or shear models, to cause the models to deform for display and analysis. However, existing engineering component models have difficulty displaying torsion angles; when bending and stretching, the strain is not intuitive enough, and the shear strain cannot be intuitively displayed. Summary of the Invention

[0004] The present invention provides an engineering component internal force analyzer, which aims to solve the technical problems in the prior art that existing engineering component models are difficult to display torsion angles, the strain is not intuitive enough during bending and stretching, and the shear strain cannot be intuitively displayed.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is to provide an engineering component internal force analyzer, comprising: The core shaft includes a first half shaft and a second half shaft, the first half shaft and the second half shaft are coaxially and equidiametrically arranged, the second half shaft includes an inner shaft and an outer shaft, the outer shaft is provided with a receiving groove at an end facing the first half shaft, and the inner shaft is slidably arranged in the receiving groove; a first magnetic member, provided at the end of the first semi-shaft facing the second semi-shaft and fixedly connected to the first semi-shaft; a second magnetic member, disposed at an end of the second semi-shaft facing the first semi-shaft, fixedly connected to the inner shaft, wherein the second magnetic member and the first magnetic member attract each other; and the attraction force between the first magnetic member and the second magnetic member is greater than the friction force between the inner shaft and the outer shaft; A plurality of component modules are sequentially sleeved on the first semi-shaft and the outer shaft and pressed against each other to form an engineering component model, with freedom of axial movement along the first semi-shaft and the second semi-shaft, and at least one component module is sleeved on the outer shaft; Among them, at least one of the two adjacent component modules is provided with angle scale stripes on its outer circumference and the other is provided with pointer stripes on its outer circumference, or one of them is provided with angle scale stripes on its axial end face and the other is provided with pointer stripes on its axial end face; at least one of the component modules is provided with displacement scale stripes on its axial end face; and the outer circumference of each of the component modules is provided with grid stripes.

[0006] In one possible implementation of the engineering component internal force analyzer provided by the present invention, an internal thread is provided on the inner circumference of a component module located at the connection between the first half-shaft and the second half-shaft, forming a connecting module; external threads matching the internal threads are provided on the outer circumferences of the ends facing each other of the first half-shaft and the outer shaft, and the connecting module is threadedly connected to the first half-shaft or the outer shaft; When the end surface of the connecting module is flush with the end surface of the first magnetic member or the second magnetic member, the first half-shaft and the second half-shaft are connected only through the first magnetic member and the second magnetic member; The connecting module spans the connection between the first half-shaft and the second half-shaft. When the first half-shaft and the outer shaft are threadedly connected, the first half-shaft and the second half-shaft are connected through the connecting module.

[0007] In a possible implementation of the engineering component internal force analyzer provided by the present invention, the first magnetic attraction member is a first magnet, and the S pole and the N pole of the first magnet are both provided on the end surface of the first semi-axis; The second magnetic attraction member is a second magnet, and the S pole and the N pole of the second magnet are both arranged on the end surface of the second semi-shaft.

[0008] In a possible implementation of the engineering component internal force analyzer provided by the present invention, the angle scale stripes, the pointer stripes, and the grid stripes are protrusions or grooves, and the displacement scale stripes are grooves.

[0009] In a possible implementation of the engineering component internal force analyzer provided by the present invention, the component module is cylindrical, coaxially arranged with the core shaft, sleeved on the core shaft, and has the freedom to slide axially along the core shaft.

[0010] In a possible implementation of the engineering component internal force analyzer provided by the present invention, the angle scale stripes and the pointer stripes are respectively provided on the outer peripheral surfaces of two adjacent component modules.

[0011] In a possible implementation of the engineering component internal force analyzer provided by the present invention, the displacement scale stripes include a plurality of circular stripes with successively increasing diameters, and the plurality of circular stripes are concentrically arranged with the end face of the component module.

[0012] The beneficial effects of the engineering component internal force analyzer provided by the present invention are as follows: compared with the prior art, the engineering component internal force analyzer provided by the present invention is respectively provided with angle scale stripes and pointer stripes on the outer peripheral surface or axial end surface of two adjacent component modules, and one of the component modules is twisted to simulate the situation where the engineering component is twisted by torque, and the component module provided with the pointer stripes will rotate an angle relative to the component module provided with the angle scale stripes, and the pointer stripes point to the position of the angle scale stripes, thereby intuitively displaying the torsion angle and then intuitively displaying the torsional strain; since the component modules have the freedom to move along the first semi-axis and the second semi-axis, when a bending moment is applied to at least two component modules to simulate the bending of the engineering component, the component modules will flip outward, and the outer parts will move away from each other, thereby intuitively displaying the bending. Strain; move the component module with displacement scale stripes so that the end face with displacement scale stripes is flush with the end face of the first magnetic component or the second magnetic component, and then apply radial shear force to overcome the force between the first magnetic component and the second magnetic component, so that the second semi-shaft and the component module thereon can be moved and dislocated radially relative to the first semi-shaft and the component module thereon, and the dislocation distance is intuitively displayed through the displacement scale stripes on the end face, thereby intuitively displaying the shear strain; since the suction force between the first magnetic component and the second magnetic component is greater than the friction force between the inner shaft and the outer shaft, a tensile force is applied to the first semi-shaft and the second semi-shaft to simulate the tensile condition of the engineering component, the inner shaft slides outward, and the distance between the two component modules at the ends of the first semi-shaft and the second semi-shaft increases, thereby intuitively simulating and displaying the tensile strain of the engineering component. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A schematic diagram of the three-dimensional structure of an engineering component internal force analyzer provided in an embodiment of the present invention; Figure 2 A schematic diagram of a three-dimensional structure showing a shear strain type of an engineering component internal force analyzer provided by an embodiment of the present invention; Figure 3 A schematic cross-sectional view of a connection module of an engineering component internal force analyzer provided by an embodiment of the present invention placed on a first semi-axis; Figure 4 A schematic cross-sectional view of the connection module of the engineering component internal force analyzer provided in an embodiment of the present invention connecting the first semi-axle and the second semi-axle; Description of reference numerals: 11. First half shaft; 12. Second half shaft; 121. Inner shaft; 122. Outer shaft; 13. External thread; 21. First magnet; 22. Second magnet; 30. Component module; 31. Connection module; 41. Angle scale stripes; 42. Pointer stripes; 43. Displacement scale stripes; 44. Grid stripes. DETAILED DESCRIPTION

[0014] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0015] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0016] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0017] Unless otherwise specified, the relative arrangement of the parts and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present application. Meanwhile, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to actual proportional relationships. Technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments can have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, and therefore, once an item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0018] In the description of this application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of this application; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0019] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be subsequently positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device may also be positioned in other different ways, and the spatially relative descriptions used herein are interpreted accordingly.

[0020] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0021] Existing engineering component models are usually integrated, such as a cylindrical or rectangular structure, with a grid on the side. The deformation of the grid during bending, torsion, and stretching is used to display bending strain, torsional strain, and tensile strain. The applicant discovered that these models have at least the following problems during use: 1. It is difficult to intuitively obtain the torsion angle during torsion; 2. When bending or stretching, the bending and stretching strains are only displayed through the deformation of the mesh, and the deformation of the mesh is small. Therefore, the bending and stretching strains are not intuitive enough; 3. The model is a whole, and it is difficult to intuitively display the shear strain.

[0022] Please also refer to Figures 1 to 4, the engineering component internal force analyzer provided by the present invention is now described. The engineering component internal force analyzer includes a core shaft, a first magnetic member, a second magnetic member and a plurality of component modules 30, the core shaft includes a first semi-shaft 11 and a second semi-shaft 12, the first semi-shaft 11 and the second semi-shaft 12 are coaxially and equidiametrically arranged, the second semi-shaft 12 includes an inner shaft 121 and an outer shaft 122, the outer shaft 122 is provided with a receiving groove toward the end of the first semi-shaft 11, and the inner shaft 121 is slidably arranged in the receiving groove; the first magnetic member is provided at the end of the first semi-shaft 11 toward the second semi-shaft 12, and is aligned with the first semi-shaft 11. The half shaft 11 is fixedly connected; the second magnetic member is arranged at the end of the second half shaft 12 facing the first half shaft 11, and is fixedly connected to the inner shaft 121, and the second magnetic member and the first magnetic member attract each other; and the attraction between the first magnetic member and the second magnetic member is greater than the friction between the inner shaft 121 and the outer shaft 122; multiple component modules 30 are sequentially sleeved on the first half shaft 11 and the outer shaft 122 and pressed against each other to form an engineering component model, which has the freedom of axial movement along the first half shaft 11 and the second half shaft 12, and at least one component module 30 is sleeved on the outer shaft 122.

[0023] Among them, at least one of the two adjacent component modules 30 is provided with angle scale stripes 41 on its outer circumference and the other is provided with pointer stripes 42 on its outer circumference, or one of them is provided with angle scale stripes 41 on its axial end face and the other is provided with pointer stripes 42 on its axial end face; at least one component module 30 is provided with displacement scale stripes 43 on its axial end face; and each component module 30 is provided with grid stripes 44 on its outer circumference.

[0024] It should be noted that both the core shaft and the component module 30 are made of a material with a certain degree of elasticity, such as polyurethane, rubber, or silicone, so that they deform when compressed or bent, exhibiting compressive and bending strains. When the angle scale stripes 41 and pointer stripes 42 are provided on the outer circumference, there is no requirement for the transparency of the component module 30. When the angle scale stripes 41 and pointer stripes 42 are provided on the axial end surface, the component module 30 engraved with the angle scale stripes 41 and pointer stripes 42 can be translucent or transparent, as long as the angle scale stripes 41 and pointer stripes 42 are visible.

[0025] In this embodiment, at least two component modules 30 are sleeved on the first half-shaft 11 , and at least one component module 30 is sleeved on the second half-shaft 12 .

[0026] The method of using the engineering component internal force analyzer provided in the embodiment of the present invention is as follows: When it is necessary to analyze the internal force of an engineering component during torsion, one of the component modules 30 provided with the angle scale stripes 41 and the pointer stripes 42 is twisted. The component module 30 provided with the pointer stripes 42 will rotate an angle relative to the component module 30 provided with the angle scale stripes 41, and the pointer stripes 42 will point to the position of the angle scale stripes 41, thereby intuitively displaying the torsion angle and then intuitively displaying the torsional strain.

[0027] When it is necessary to analyze the internal force of an engineering component during bending, the first semi-axis 11 is bent downward, and the component module 30 will flip outward with the lower side as the axis, so that the upper sides of adjacent component modules 30 are separated and away from each other, showing the bending strain, which is more intuitive than showing the bending strain only through the deformation of the model.

[0028] When it is necessary to analyze the internal force of the engineering component during shear, first make the end face with the displacement scale stripes 43 flush with the end face of the first magnetic component or the second magnetic component, and then apply radial shear force to overcome the force between the first magnetic component and the second magnetic component, so that the second semi-axis 12 and the component module 30 thereon can be moved and dislocated radially relative to the first semi-axis 11 and the component module 30 thereon, and the dislocation distance can be intuitively displayed through the displacement scale stripes 43 on the end face, thereby intuitively displaying the shear strain.

[0029] When it is necessary to analyze the internal force of the engineering component during stretching, a tensile force is applied to the first half-shaft 11 and the second half-shaft 12 to simulate the tensile condition of the engineering component. Since the suction force between the first magnetic component and the second magnetic component is greater than the friction force between the inner shaft 121 and the outer shaft 122, the inner shaft 121 slides outward, and the distance between the two component modules 30 at the ends of the first half-shaft 11 and the second half-shaft 12 increases, thereby intuitively simulating and displaying the tensile strain of the engineering component.

[0030] When it is necessary to analyze the internal forces of an engineering component under pressure, the method of using the traditional model is consistent with that of applying circumferential pressure to the component modules 30 at both ends of the internal force analyzer.

[0031] The beneficial effects of the engineering component internal force analyzer provided by the embodiment of the present invention are as follows: compared with the prior art, the engineering component internal force analyzer provided by the embodiment of the present invention is respectively provided with angle scale stripes 41 and pointer stripes 42 on the outer peripheral surface or axial end surface of two adjacent component modules 30, and one of the component modules 30 is twisted to simulate the situation where the engineering component is twisted by torque, and the component module 30 provided with the pointer stripes 42 will rotate an angle relative to the component module 30 provided with the angle scale stripes 41, and the pointer stripes 42 point to the position of the angle scale stripes 41, so as to intuitively display the torsion angle and then intuitively display the torsional strain; since the component module 30 has the freedom to move along the first semi-axis 11 and the second semi-axis 12, when a bending moment is applied to at least two component modules 30 to simulate the bending of the engineering component, the component module 30 will flip outward, and the outer parts will separate and move away from each other, compared with only the model. The deformation shows the bending strain more intuitively; move the component module 30 with the displacement scale stripes 43 so that the end face with the displacement scale stripes 43 is flush with the end face of the first magnetic component or the second magnetic component, and then apply radial shear force to overcome the force between the first magnetic component and the second magnetic component, so that the second semi-shaft 12 and the component module 30 thereon can be moved and dislocated radially relative to the first semi-shaft 11 and the component module 30 thereon, and the dislocation distance is intuitively displayed through the displacement scale stripes 43 on the end face, thereby intuitively displaying the shear strain; because the suction force between the first magnetic component and the second magnetic component is greater than the friction force between the inner shaft 121 and the outer shaft 122, a tensile force is applied to the first semi-shaft 11 and the second semi-shaft 12, and when simulating the tensile condition of the engineering component, the inner shaft 121 slides outward, and the distance between the two component modules 30 at the ends of the first semi-shaft 11 and the second semi-shaft 12 increases, thereby intuitively simulating and displaying the tensile strain of the engineering component.

[0032] like Figure 3 and Figure 4 As shown, in a specific implementation of the engineering component internal force analyzer provided by an embodiment of the present invention, an internal thread is provided on the inner periphery of a component module 30 located at the connection between the first half-shaft 11 and the second half-shaft 12 to form a connecting module 31; the outer peripheries of the facing ends of the first half-shaft 11 and the outer shaft 122 are provided with external threads 13 matching the internal threads, and the connecting module 31 is threadedly connected to the first half-shaft 11 or the outer shaft 122.

[0033] Specifically, the axial length of the external thread on the first half-shaft 11 or the outer shaft 122 is not less than the axial length of the connecting module 31. The outer diameter of the external thread is not greater than the outer diameters of the first half-shaft 11 and the outer shaft 122, so that the component module 30 can slide on the portion provided with the external thread.

[0034] When the end surface of the connecting module 31 is flush with the end surface of the first magnetic member or the second magnetic member, the first half-shaft 11 and the second half-shaft 12 are connected only through the first magnetic member and the second magnetic member.

[0035] The connecting module 31 spans the connection between the first half-shaft 11 and the second half-shaft 12 . When the first half-shaft 11 and the outer shaft 122 are threadedly connected, the first half-shaft 11 and the second half-shaft 12 are connected only through the connecting module 31 .

[0036] Preferably, in this embodiment, six component modules 30 are sleeved on the first half-shaft 11 , and three component modules 30 are sleeved on the second half-shaft 12 .

[0037] It should be noted that when analyzing the internal force during shearing, the connection module 31 is arranged at the end of the first semi-shaft 11 facing the second semi-shaft 12; when analyzing the internal force during bending, the connection module 31 is rotated so that the connection module 31 is threadedly connected to the first semi-shaft 11 and the second semi-shaft 12 at the same time, and the first semi-shaft 11 and the second semi-shaft 12 are connected as a whole, so that the component modules 30 on the first semi-shaft 11 and the second semi-shaft 12 can all participate in the simulation display of bending strain, ensuring the number of component modules 30 participating in the simulation of bending strain, making the simulation structure more vivid, and there are no idle component modules 30, so as to avoid waste.

[0038] Further, such as Figure 3 and Figure 4 As shown, in a specific implementation of the engineering component internal force analyzer provided in an embodiment of the present invention, the first magnetic attraction member is a first magnet 21, and the S pole and N pole of the first magnet 21 are both arranged on the end face of the first semi-axis 11.

[0039] The second magnetic attraction member is a second magnet 22 , and both the S pole and the N pole of the second magnet 22 are disposed on the end surface of the second semi-shaft 12 .

[0040] The cross section of the inner shaft 121 along a direction perpendicular to the axial direction is an elliptical, rectangular, square, or other non-circular shape to prevent the inner shaft 121 from rotating relative to the outer shaft 122 .

[0041] It should be noted that when the opposite poles of the first magnet 21 and the second magnet 22 attract each other and align, the threads on the first half shaft 11 and the outer shaft 122 are just connected, so that the connection module 31 can be screwed onto the outer shaft 122; the first magnet 21 and the second magnet 22 are circular or rectangular, and the S pole and the N pole are both arranged on the end face of the first half shaft 11 or the inner shaft 121. The opposite poles of the magnets attract each other, and when there is no external force, the two magnets tend to be aligned, which reduces the difficulty of connecting the threads on the first half shaft 11 and the outer shaft 122.

[0042] Preferably, the first magnet 21 and the second magnet 22 are circular magnets magnetized in the radial direction. Circular magnets have better centering properties than rectangular bar magnets.

[0043] like Figure 1 and Figure 2 As shown, in a specific embodiment of the engineering component internal force analyzer provided by an embodiment of the present invention, the angle scale stripes 41, the pointer stripes 42, and the grid stripes 44 are protrusions or grooves. The displacement scale stripes 43 are grooves, so that the connected component modules 30 can fit together and slide radially.

[0044] Furthermore, the angle scale stripes 41 , the pointer stripes 42 , the displacement scale stripes 43 and the grid stripes 44 are painted with a color different from that of the component module 30 to facilitate viewing.

[0045] The angle scale stripes 41 are a plurality of short lines with equal spacing, and the interval between two adjacent short lines is a fixed angle of 2 degrees, which can also be 1 degree or 5 degrees, etc., depending on actual needs.

[0046] The pointer stripe 42 is a short line pointing to the angle scale stripe 41 .

[0047] The grid stripes 44 are in the form of a rectangular grid to make the strain more intuitive.

[0048] like Figure 1 and Figure 2 As shown, in a specific implementation of the engineering component internal force analyzer provided by an embodiment of the present invention, the component module 30 is cylindrical, coaxially arranged with the core shaft, sleeved on the core shaft, and has the freedom to slide axially along the core shaft.

[0049] Furthermore, the angle scale stripes 41 and the pointer stripes 42 are respectively provided on the outer peripheral surfaces of two adjacent component modules 30 for easy viewing.

[0050] like Figure 2 As shown, in a specific implementation of the engineering component internal force analyzer provided in an embodiment of the present invention, the displacement scale stripes 43 include a plurality of circular stripes with successively increasing diameters, and the plurality of circular stripes are concentrically arranged with the end face of the component module 30, and can directly display the displacement distance in any direction along the plane.

[0051] Specifically, the distance between two adjacent circular stripes is 2 mm, and can also be 1 mm or 5 mm, etc., which is set according to actual needs.

[0052] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An internal force analyzer for engineering components, characterized in that: include: The core shaft includes a first half shaft and a second half shaft, the first half shaft and the second half shaft are coaxially and equidiametrically arranged, the second half shaft includes an inner shaft and an outer shaft, the outer shaft is provided with a receiving groove at an end facing the first half shaft, and the inner shaft is slidably arranged in the receiving groove; a first magnetic member, provided at the end of the first semi-shaft facing the second semi-shaft and fixedly connected to the first semi-shaft; a second magnetic member, disposed at an end of the second semi-shaft facing the first semi-shaft, fixedly connected to the inner shaft, wherein the second magnetic member and the first magnetic member attract each other; and the attraction force between the first magnetic member and the second magnetic member is greater than the friction force between the inner shaft and the outer shaft; A plurality of component modules are sequentially sleeved on the first semi-shaft and the outer shaft and pressed against each other to form an engineering component model, with freedom of axial movement along the first semi-shaft and the second semi-shaft, and at least one component module is sleeved on the outer shaft; Among them, at least one of the two adjacent component modules is provided with angle scale stripes on its outer circumference and the other is provided with pointer stripes on its outer circumference, or one of them is provided with angle scale stripes on its axial end face and the other is provided with pointer stripes on its axial end face; at least one of the component modules is provided with displacement scale stripes on its axial end face; and the outer circumference of each of the component modules is provided with grid stripes.

2. The engineering component internal force analyzer according to claim 1, characterized in that: An internal thread is provided on the inner periphery of a component module located at the connection between the first half-shaft and the second half-shaft, forming a connecting module; external threads matching the internal threads are provided on the outer peripheries of the ends of the first half-shaft and the outer shaft facing each other, and the connecting module is threadedly connected to the first half-shaft or the outer shaft; When the end surface of the connecting module is flush with the end surface of the first magnetic member or the second magnetic member, the first half-shaft and the second half-shaft are connected only through the first magnetic member and the second magnetic member; The connecting module spans the connection between the first half-shaft and the second half-shaft. When the first half-shaft and the outer shaft are threadedly connected, the first half-shaft and the second half-shaft are connected through the connecting module.

3. The engineering component internal force analyzer according to claim 2, characterized in that: The first magnetic attraction member is a first magnet, and the S pole and the N pole of the first magnet are both arranged on the end surface of the first semi-shaft; The second magnetic attraction member is a second magnet, and the S pole and the N pole of the second magnet are both arranged on the end surface of the second semi-shaft.

4. The engineering component internal force analyzer according to claim 1, characterized in that: The angle scale stripes, the pointer stripes and the grid stripes are protrusions or grooves, and the displacement scale stripes are grooves.

5. The engineering component internal force analyzer according to claim 1, characterized in that: The component module is cylindrical, coaxially arranged with the core shaft, sleeved on the core shaft, and has the freedom to slide along the axial direction of the core shaft.

6. The engineering component internal force analyzer according to claim 5, characterized in that: The angle scale stripes and the pointer stripes are respectively arranged on the outer peripheral surfaces of two adjacent component modules.

7. The engineering component internal force analyzer according to claim 6, characterized in that: The displacement scale stripes include a plurality of circular stripes with successively increasing diameters, and the plurality of circular stripes are concentrically arranged with the end face of the component module.

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