A truss experimental device

Abstract

The present application relates to teaching aid technical field, especially a kind of truss experimental device, it includes, bearing assembly, including workbench, the connecting plate being arranged outside the workbench and the blocking frame being movably arranged outside the workbench;And, lower pressing component, including the support being movably arranged outside the connecting plate, the lower pressing plate being arranged outside the support, the extension plate being integrally formed outside the lower pressing plate, the tension contact block being arranged in the section of the extension plate and the sensor display being arranged outside the workbench;The present application is by being provided with two symmetrical blocking frames on workbench, when lower pressing component starts to give truss assembly lower pressure, blocking frame will be blocked to truss assembly, to avoid the parts flying out when truss assembly " collapse " harm to experimental personnel, effectively solve the problems existing in the prior art.

Description

TECHNICAL FIELD

[0001] The present application relates to teaching aids technical field, particularly a truss experimental device. BACKGROUND

[0002] Structural mechanics is a compulsory course for civil engineering majors in colleges and universities, mainly taking beam, arch, truss and rigid frame as the main research object, and studying the internal force and deformation of structure under the action of external force and other external factors, the strength, stiffness, stability and dynamic response of structure, and the composition rule and stress performance of structure according to the principle of mechanics.

[0003] At present, the teaching method of structural mechanics in colleges and universities is mainly theoretical teaching, which lacks experimental verification of related mechanical principles, resulting in that some students do not understand the related theory deeply, and even doubt the related theory. Therefore, introducing experimental link in the teaching of structural mechanics is an inevitable trend of its teaching development.

[0004] In some parts of structural mechanics teaching, truss structure is often taken as the research object, but the truss structure model in the laboratory lacks certain safety measures. If the pressure on the truss is too large, the collapse of the truss may cause potential risks to the safety of the experimental personnel. SUMMARY

[0005] This part aims to summarize some aspects of the embodiments of the present application and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this part and the abstract and title of the specification of the present application to avoid obscuring the purpose of this part, the abstract and the title of the specification, and such simplifications or omissions cannot be used to limit the scope of the present application.

[0006] In view of the above problems, the present application is proposed.

[0007] To solve the above technical problems, the present application provides the following technical scheme: a truss experimental device, comprising a bearing assembly comprising a workbench, a connecting plate arranged outside the workbench and a blocking frame movably arranged outside the workbench; and a pressing assembly comprising a support movably arranged outside the connecting plate, a pressing plate arranged outside the support, an extension plate integrally formed outside the pressing plate, a tension contact block arranged in the cross section of the extension plate and a sensor display arranged outside the workbench; and a truss assembly movably arranged at the end surface of the workbench.

[0008] As a preferred scheme of the truss experimental device of the present application, wherein: the truss assembly is formed by twelve tension rods connected at the head and tail, and each vertically symmetrical hinge point is provided with a vertical rod, and the truss assembly further comprises five inclined rods, and the head and tail of each inclined rod are connected with the hinge of each tension rod.

[0009] As a preferred scheme of the truss experimental device, the connecting plate is externally provided with a mounting groove, and the left and right inner walls of the mounting groove are provided with buffer grooves, and the buffer grooves are internally provided with elastic members; the end face of the mounting groove is further provided with a insertion slot, and the outer wall of the connecting plate is respectively provided with a first through slot and a second through slot which are in communication with the insertion slot.

[0010] As a preferred scheme of the truss experimental device, the connecting assembly further comprises an insertion plate which is slidably arranged in the insertion slot, and the two sides of the insertion plate are provided with protruding blocks which extend into the buffer grooves and are connected with the elastic members; the end face of the insertion plate is provided with a limiting slot, and the outer wall of the insertion plate is provided with a transmission slot in which a rotating rod is movably arranged, and one end of the rotating rod is connected with the blocking frame by penetrating through the first through slot.

[0011] As a preferred scheme of the truss experimental device, the end face of the workbench is provided with an abutting slot, and the connecting assembly further comprises a transmission block which is movably arranged outside the connecting plate, and one end of the transmission block is connected with the insertion plate by penetrating through the second through slot; the outer wall of the transmission block is provided with a connecting slot in which a first roller is movably arranged.

[0012] As a preferred scheme of the truss experimental device, the outer wall of the connecting plate is rotatably provided with a triangular plate, one end of the first roller is connected with the triangular plate, the end face of the abutting slot is slidably provided with a concave plate, and the outer wall of the concave plate is rotatably provided with a second roller, one end of the second roller is connected with the triangular plate, and the outer wall of the concave plate is screw-connected with an L-shaped plate.

[0013] As a preferred scheme of the truss experimental device, the support assembly further comprises a fixed plate which is screw-connected to the end face of the workbench, and the fixed plate is internally provided with a connecting sliding groove, the inner wall of the connecting sliding groove is slidably provided with a connecting sliding block, and the end face of the connecting sliding block is provided with a fixing frame for supporting the truss assembly.

[0014] As a preferred scheme of the truss experimental device, the inner wall of the fixed plate is provided with a through slot, and the through slot is movably provided with a brake plate, the through slot is slidably provided with a trigger block, and the outer wall of the trigger block is movably connected with a connecting rod, one end of the connecting rod is connected with the L-shaped plate; when the brake plate is in contact with the connecting sliding block, the brake plate will make the connecting sliding block stationary by friction.

[0015] As a preferred scheme of the truss experimental device, the end surface of the connecting plate is provided with a supporting slide rail, the support is internally provided with a supporting slide block capable of slidingly cooperating with the supporting slide rail, the outer wall of the support is provided with a bearing seat, the bearing seat is movably provided with a transmission screw rod, the lower pressing plate is internally embedded with a transmission nut, and the inner wall of the transmission nut movably cooperates with the transmission screw rod.

[0016] As a preferred scheme of the truss experimental device, the outer wall of the support is provided with a slide column, the outer wall of the lower pressing plate is provided with an opening for slidingly cooperating with the slide column, the end surface of the support is provided with a control box, the control box is internally provided with a motor, and the output end of the motor is connected with the transmission screw rod, and the outer wall of the control box is provided with a control switch electrically connected with the motor.

[0017] The present application has the beneficial effect that the two symmetrical blocking frames are arranged on the workbench surface, when the lower pressing assembly starts to give the truss assembly a downward pressing force, the blocking frames will block the truss assembly to prevent the scattered parts from hurting the experimental personnel when the truss assembly collapses, effectively solving the problems in the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor. Among them:

[0019] Figure 1 It is the overall structure diagram in the present application.

[0020] Figure 2 It is the workbench structure diagram in the present application.

[0021] Figure 3 It is the truss assembly structure diagram in the present application.

[0022] Figure 4 It is the lower pressing assembly structure diagram in the present application.

[0023] Figure 5 It is the enlarged schematic diagram of the "A" part structure in the present application.

[0024] Figure 6 It is the overall structure and its local enlarged structure diagram in the present application. DETAILED DESCRIPTION

[0025] In order to make the above objectives, characteristics and advantages of the present application more apparent, a detailed description of the specific embodiments of the present application will be given below with reference to the accompanying drawings.

[0026] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. The present application, however, can be practiced in a variety of ways other than those specifically described herein without departing from the scope of the present application, and it is understood that it covers all technical and structural equivalents of the elements described and / or illustrated herein. Therefore, the present application is not limited to the specific embodiments disclosed below, but only constrained by the scope of the claims.

[0027] Secondly, the "one embodiment" or "embodiment" referred to herein means that the specific features, structures or characteristics can be included in at least one implementation of the present application. "In one embodiment" appearing in different places in the specification does not mean the same embodiment, nor is it an embodiment that is independent or alternative to other embodiments.

[0028] Embodiment 1

[0029] Reference Figures 1-6 For the first embodiment of the present application, the embodiment provides a truss experimental device. When the lower pressing assembly 200 starts to give the truss assembly H a downward pressure, the blocking frame 103 will block the truss assembly H to prevent the scattered parts from injuring the experimental personnel when the truss assembly H "collapses", effectively solving the problems existing in the prior art

[0030] Specifically, the bearing assembly 100 includes a workbench 101, a connecting plate 102 arranged outside the workbench 101, and a blocking frame 103 movably arranged outside the workbench 101; the lower pressing assembly 200 includes a support 201 movably arranged outside the connecting plate 102, a lower pressing plate 202 arranged outside the support 201, an extension plate 203 integrally formed outside the lower pressing plate 202, a tension contact block 203a arranged in the cross section of the extension plate 203, and a sensor display 203a-1 arranged outside the workbench 101; and the truss assembly H is movably arranged at the end surface of the workbench 101.

[0031] Preferably, as shown in Figure 3 The truss assembly H is formed by twelve tension rods H-1 connected end to end, and each vertically symmetrical hinge point is provided with a vertical rod H-3. The truss assembly H further includes five inclined rods H-2, and the ends of each inclined rod H-2 are connected to the hinge points of each tension rod H-1.

[0032] The lower pressing assembly 200 is used for supporting the tension contact block 203a to move in the vertical direction and transmitting force to the truss assembly H, and the data information of the lower pressing force obtained by the tension contact block 203a is transmitted to the sensor display 203a-1, and the experimenters can calculate the force of each node in the truss assembly H through the information in the sensor display 203a-1. The experimenters can assemble the truss assembly H into any span (1-5 spans) and form (rectangle, triangle, trapezoid) by operating the truss assembly H.

[0033] It should be noted that the material of the blocking frame 103 can be a silicate non-metallic material, so as to facilitate the observation of the experiment.

[0034] The blocking frame 103 is used to close the workbench 101 after the truss assembly H is assembled, so as to prevent the scattering of the components when the truss assembly H collapses.

[0035] Embodiment 2

[0036] Reference Figures 1-6 For the second embodiment of the application, the embodiment is based on the previous embodiment, and the difference is that a blocking frame 103 is automatically closed by the lower pressing of the lower pressing assembly 200.

[0037] Specifically, the connecting plate 102 is externally provided with a mounting groove 102a, and the left and right inner walls of the mounting groove 102a are both provided with a buffer groove 102b, and the buffer groove 102b is internally provided with an elastic member 102b-1; the end face of the mounting groove 102a is also provided with a plug groove 102c, and the outer wall of the connecting plate 102 is provided with a first through groove K-1 and a second through groove K-2 which can communicate with the plug groove 102c; wherein the mounting groove 102a is used for accommodating the elastic member 102b-1, and the elastic member 102b-1 is a tension spring.

[0038] Further comprising a connecting assembly 300; the connecting assembly 300 comprises a plug plate 301 which is slidingly arranged in the plug groove 102c, and the two sides of the plug plate 301 are both provided with a protruding block which extends into the buffer groove 102b and is connected with the elastic member 102b-1, the end face of the plug plate 301 is provided with a limiting groove 301a, and the outer wall of the plug plate 301 is provided with a transmission groove 301b, the transmission groove 301b is movably provided with a rotating rod 301b-1, and one end of the rotating rod 301b-1 is connected with the blocking frame 103 by penetrating the first through groove K-1. Figure 2 As shown in the figure, the two transmission grooves 301b are in the shape of an "eight", the rotating rod 301b-1 will be displaced within the stroke of the transmission groove 301b, but cannot be separated from the transmission groove 301b; and the blocking frame 103 is limited and can only move in the horizontal direction on the workbench 101.

[0039] As described above, when the plug plate 301 moves downward, due to the contact between the protrusion and the elastic piece 102b-1, the movement of the plug plate 301 will cause the elastic piece 102b-1 to deform and have a certain elastic force, and the plug plate 301 can only move in the vertical direction under the influence of the plug groove 102c, and the deviation can be ignored.

[0040] In summary, the plug plate 301 is connected with the pressing plate 202 in the pressing assembly 200, that is, the plug plate 301 will move with the pressing plate 202. When the pressing assembly 200 moves downward, it can be assumed that the truss assembly H has been assembled and can be tested for bearing capacity.

[0041] When the pressing plate 202 drives the plug plate 301 to move downward, due to the horizontal restriction of the blocking frame 103, the rotating rod 301b-1 will displace in the transmission groove 301b, and through the cooperation between the rotating rod 301b-1 and the transmission groove 301b, the two blocking frames 103 are pushed to approach or move away from each other.

[0042] Embodiment 3

[0043] Reference Figures 1-6 For the third embodiment of the present application, which is based on the previous embodiment, the difference is that the plug plate 301 moves in the vertical direction to limit the connection of the sliding block 403 in the connection sliding groove 401a.

[0044] Specifically, the end surface of the workbench 101 is provided with an abutting groove 101a, and the connection assembly 300 further comprises a transmission block 302 movably arranged outside the connecting plate 102, one end of the transmission block 302 is screwed with the plug plate 301 through the second through groove K-2, and the outer wall of the transmission block 302 is provided with a connecting groove 302a, and a first roller 302a-1 is movably arranged in the connecting groove 302a; wherein, if the plug plate 301 moves in the vertical direction, the transmission block 302 will move with the plug plate 301.

[0045] The connecting plate 102 is rotatably provided with a triangular plate 303, one end of the first roller 302a-1 is connected with the triangular plate 303, the end surface of the abutting groove 101a is slidably provided with a concave plate 304, the outer wall of the concave plate 304 is rotatably provided with a second roller 304a, one end of the second roller 304a is connected with the triangular plate 303, and the outer wall of the concave plate 304 is screwed with an L-shaped plate 304a-1; wherein, the L-shaped plate 304a-1 is arranged in the abutting groove 101a, and the L-shaped plate 304a-1 can only move in the horizontal direction.

[0046] Further comprising a support assembly 400; the support assembly 400 comprises a fixed plate 401 screwed to the end face of the workbench 101, and the fixed plate 401 is provided with a connecting sliding groove 401a, the inner wall of the connecting sliding groove 401a is slidably provided with a connecting sliding block 403, and the end face of the connecting sliding block 403 is provided with a fixing frame 403a for supporting the truss assembly H. Wherein, the bottom of the fixed plate 401 has a supporting leg, which can make a certain gap between the fixed plate 401 and the L-shaped plate 304a-1, so as to avoid affecting the displacement of the L-shaped plate 304a-1 due to the setting of the fixed plate 401.

[0047] The inside of the fixed plate 401 is provided with a through slot 401b, and the through slot 401b is movably provided with a brake plate 401b-1; the through slot 401b is slidably provided with a trigger block 402, and the outer wall of the trigger block 402 is movably connected with a connecting rod 402a, and the connecting rod 402a is connected with the L-shaped plate 304a-1 at the end away from the trigger block 402; wherein, when the brake plate 401b-1 contacts with the connecting sliding block 403, the brake plate 401b-1 will make the connecting sliding block 403 stationary through friction.

[0048] The end face of the connecting plate 102 is provided with a supporting sliding rail 104, the supporting sliding rail 104 is slidably connected with a supporting sliding block 201d in the bracket 201, the outer wall of the bracket 201 is provided with a bearing seat 201a-1, the bearing seat 201a-1 is movably provided with a transmission screw 201a, the lower pressing plate 202 is embedded with a transmission nut 202a, and the inner wall of the transmission nut 202a movably connects with the transmission screw 201a, and the bracket 201 is provided with a third roller 202b at the end close to the plug plate 301, which is slidably connected with the limiting groove 301a. Wherein, since the lower pressing assembly 200 needs to press any point on the truss assembly H for testing, the cooperation of the third roller 202b and the limiting groove 301a can facilitate the horizontal displacement of the lower pressing assembly 200.

[0049] The outer wall of the bracket 201 is provided with a sliding column 201b, and the outer wall of the lower pressing plate 202 is provided with an opening for sliding connection with the sliding column 201b, the end face of the bracket 201 is provided with a control box 201c, and the control box 201c is provided with a motor, and the output end of the motor is connected with the transmission screw 201a, and the outer wall of the control box 201c is provided with a control switch 201c-1 electrically connected with the motor. Specifically, when the control switch 201c-1 of the control box 201c is turned on, the output shaft of the motor will drive the transmission screw 201a to rotate, and the inner wall of the transmission nut 202a is provided with an inner thread matched with the outer thread of the transmission screw 201a, based on the sliding connection between the sliding column 201b and the lower pressing plate 202, when the transmission screw 201a rotates, the lower pressing plate 202 can rise or fall in the vertical direction.

[0050] In summary, when the experimenters assemble the truss assembly H, the truss assembly H can be adjusted to the appropriate position on the workbench 101, and then control the pressing assembly 200, so that the pressing plate 202 drives the tension contact block 203a to move downward and contact the truss assembly H. In this process, the plug-in plate 301 will descend with the pressing plate 202, as described in the above embodiment.

[0051] During the descent of the pressing plate 202, the plug-in plate 301 will be driven to descend with the pressing plate 202, as described in the above embodiment. Figure 5 As shown, through the cooperation of the first roller 302a-1 and the connecting groove 302a, the triangular plate 303 rotates, and through the rotation of the triangular plate 303 and based on the connection of the second roller 304a and the concave plate 304, the L-shaped plates 304a-1 move away from each other.

[0052] And because the L-shaped plates 304a-1 move away from each other, the connecting rod 402a pushes the trigger block 402 to move vertically upward in the through groove 401b, thereby pushing the brake plate 401b-1 to contact the connecting sliding block 403, so that the connecting sliding block 403 is stationary in the connecting sliding groove 401a on the fixed plate 401.

[0053] It should be noted that, similarly, when the pressing plate 202 rises, the brake plate 401b-1 will be located in the through groove 401b without contacting the connecting sliding block 403, that is, the movement of the connecting sliding block 403 in the connecting sliding groove 401a is not affected.

[0054] That is, the descent of the pressing assembly 200 will trigger multiple effects at the same time, which can be summarized as: 1, the closing of the blocking frame 103; 2, locking the truss assembly H to avoid its deviation in the horizontal position.

[0055] It is important to note that the construction and arrangement of the application shown in the various exemplary embodiments is illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review the present disclosure will readily appreciate that many modifications can be made to the embodiments without departing from the spirit and scope of the application, as described in the claims (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters, mounting arrangements, use of materials, colors, orientations, etc. and the like). For example, the position of elements can be reversed or otherwise varied and the nature or number of elements can be altered or varied. Accordingly, all such modifications are intended to be included within the scope of the present application. The order or sequence of any process or method steps can be varied or re-sequenced without departing from the spirit of the application. Any "apparatus" or "device" described herein can be embodied in many different forms and a "means" for performing any function described herein can include any of the apparatus or structures described herein. In the claims, any means-plus-function clause is intended to cover the structures described herein as performing the recited function and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present application. Accordingly, the present application is not limited to the particular embodiments described in the specification.

[0056] In addition, for purposes of brevity of description, it is not the intention of the

[0057] It is understood that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions can be made. Such development efforts might be complex and time-consuming, but would nevertheless be a routine undertaking for those of ordinary skill in the art having the benefit of this disclosure.

[0058] It should be noted that the above-mentioned embodiments are only used to illustrate the technical solutions of the present application but not to limit the present application, and although the present application is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or equivalent replaced without departing from the spirit and scope of the present application, and all should be included in the scope of the claims of the present application.

Claims

1. A truss experimental device, characterized by: include, A bearing assembly (100) comprises a workbench (101), a connecting plate (102) disposed outside the workbench (101), and a retaining frame (103) movably disposed outside the workbench (101); and, A pressing assembly (200) comprises a bracket (201) movably arranged outside the connecting plate (102), a pressing plate (202) arranged outside the bracket (201), an extension plate (203) integrally formed outside the pressing plate (202), a tension contact block (203a) arranged on a cross section of the extension plate (203), and a sensor display (203a-1) arranged outside the workbench (101); and, a truss assembly (H) movably arranged on the end surface of the workbench (101); The truss assembly (H) is formed by twelve tie rods (H-1) hinged to each other at the head and tail, and each vertically symmetrical hinge point is provided with a vertical rod (H-3). The truss assembly (H) also includes five diagonal rods (H-2), and the head and tail of each diagonal rod (H-2) are respectively connected to the hinge of each tie rod (H-1); The connecting plate (102) is provided with a seating groove (102a) on the outside, and buffer grooves (102b) are provided on both left and right sides of the inner wall of the seating groove (102a), and an elastic member (102b-1) is provided in the buffer groove (102b); the end surface of the seating groove (102a) is also provided with a slot (102c), and the outer wall of the connecting plate (102) is respectively provided with a first through groove (K-1) and a second through groove (K-2) that can communicate with the slot (102c); The invention also includes a connecting assembly (300); the connecting assembly (300) includes an inserting plate (301) slidably arranged in the slot (102c), and protrusions are provided on both sides of the inserting plate (301), the protrusions extend into the buffer groove (102b) and are connected to the elastic member (102b-1), a limiting groove (301a) is provided on the end surface of the inserting plate (301), and a transmission groove (301b) is provided on the outer wall of the inserting plate (301), a rotating rod (301b-1) is movably provided in the transmission groove (301b), and one end of the rotating rod (301b-1) passes through the first through groove (K-1) and is connected to the stop frame (103).

2. The truss experimental device according to claim 1, characterized in that: The end surface of the workbench (101) is provided with a resistance groove (101a), and the connecting assembly (300) further comprises a transmission block (302) movably arranged outside the connecting plate (102), and one end of the transmission block (302) passes through the second through groove (K-2) and is screwed to the plug plate (301), and the outer wall of the transmission block (302) is provided with a connection groove (302a), and a first roller (302a-1) is movably provided in the connection groove (302a).

3. The truss experimental device according to claim 2, characterized in that: A triangular plate (303) is rotatably provided on the outside of the connecting plate (102), one end of the first roller (302a-1) is connected to the triangular plate (303), a concave plate (304) is slidably provided on the end surface of the abutting groove (101a), and a second roller (304a) is rotatably provided on the outer wall of the concave plate (304), one end of the second roller (304a) is connected to the triangular plate (303), and an L-shaped plate (304a-1) is screwed onto the outer wall of the concave plate (304).

4. The truss experimental device according to claim 3, characterized in that: The invention also includes a support assembly (400); the support assembly (400) includes a fixed plate (401) screwed to the end surface of the workbench (101), and a connecting groove (401a) is provided in the fixed plate (401), a connecting slider (403) is slidably provided on the inner wall of the connecting groove (401a), and the end surface of the connecting slider (403) is provided with a fixing frame (403a) for supporting the truss assembly (H).

5. The truss experimental device according to claim 4, characterized in that: A through slot (401b) is provided inside the fixed plate (401), and a brake plate (401b-1) is movably provided in the through slot (401b), a trigger block (402) is slidably provided in the through slot (401b), and a connecting rod (402a) is movably connected to the outer wall of the trigger block (402), and the connecting rod (402a) is connected to the L-shaped plate (304a-1) at one end away from the trigger block (402); wherein, when the brake plate (401b-1) contacts the connecting slider (403), the brake plate (401b-1 will cause the connecting slider (403) to be stationary through friction.

6. The truss experimental device according to claim 1, wherein: The end surface of the connecting plate (102) is provided with a supporting slide rail (104), the bracket (201) is provided with a supporting slider (201d) that can slide with the supporting slide rail (104), the outer wall of the bracket (201) is provided with a bearing seat (201a-1), a transmission screw (201a) is movably provided in the bearing seat (201a-1), a transmission nut (202a) is embedded in the lower pressure plate (202), and the inner wall of the transmission nut (202a) is movably matched with the transmission screw (201a), and the bracket (201) is provided with a third roller (202b) that can slide with the limiting groove (301a) at one end close to the plug plate (301).

7. The truss experimental device according to claim 6, characterized in that: The outer wall of the bracket (201) is provided with a sliding column (201b), the outer wall of the lower pressure plate (202) is provided with an opening for sliding cooperation with the sliding column (201b), the end surface of the bracket (201) is provided with a control box (201c), and a motor is provided in the control box (201c), and the output end of the motor is connected to the transmission screw (201a), and the outer wall of the control box (201c) is provided with a control switch (201c-1) electrically connected to the motor.

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