CN204359613U - Space structure dynamics experimental device - Google Patents

Abstract

The utility model discloses a space structure mechanics experiment device, which comprises a space test frame, a loading mechanism and a bar system for a space to be tested. The mechanism can move in the top plane of the test frame and is arranged on the top of the test frame, and the loading mechanism acts on the test rod system of the space to be measured through the pressure head. The overall statics and dynamics test experiments can be carried out on the space structure model, and the overall performance of the space structure can be tested and evaluated; the whole set of experimental devices is simple in structure, easy to combine, and has various functions, which can not only stimulate students' interest in learning, but also exercise Students' hands-on ability.

Description

Experimental device for space structure mechanics

technical field

The utility model relates to the technical field of mechanics experiments, in particular to a space structure mechanics experiment device.

Background technique

Most of the current mechanical experiment devices are for static experiments on planar structures, and most of them cannot conduct experiments on spatial structures, let alone carry out dynamic experiments on spatial structures.

Moreover, the existing mechanical experiment devices have poor composability, the mechanical model is too simple and lacks transformation, and the structure and function are single, which cannot stimulate students' interest in learning and hands-on ability.

Utility model content

Aiming at the deficiencies of the existing technology, the technical problem to be solved by the utility model is to provide a space structure mechanics experiment device, which can carry out static and dynamic tests on the space structure.

In order to solve the problems of the technologies described above, the technical solution adopted in the utility model is:

The experimental device for space structure mechanics includes a space test frame, a loading mechanism and a rod system for the space experiment to be measured. The one that moves in the plane is set on the top of the test frame, and the loading mechanism acts on the test bar system in the space to be measured through the indenter.

Further, the loading mechanism includes a threaded rod, a loading handwheel, a loading platform, and a dynamometer, the threaded rod passes through the screw hole on the loading platform, the loading handwheel is set on the top of the threaded rod, and the pressure head is set on the At the lower end of the threaded rod, the sensor of the dynamometer is arranged between the threaded rod and the indenter.

The top of the experimental frame is provided with a polished rod and a screw rod side by side, the polished rod passes through the light hole on the loading mechanism, the screw rod passes through the threaded hole on the loading mechanism, the end of the polished rod is provided with a transmission gear, and the top of the experimental frame is provided with a transmission gear matching rack.

The indenter is a ball indenter.

The experimental rod system in the space to be measured includes a basic rod and a connecting joint. The connecting joint is provided with a set of protruding connecting heads, and the ends of the basic rod are adapted to the connecting heads.

The experimental base platform is provided with a set of positioning holes for locating the experimental rod system in the space to be measured.

A length adjusting rod is arranged between the threaded rod and the pressing head.

One end of the polished rod and the screw rod is provided with a handle wheel, and the other end of the polished rod and the screw rod is provided with a limit wheel.

Both ends of the screw mandrel are provided with a section of smooth section circular shaft, and the smooth section round shafts at both ends of the screw mandrel are movably arranged on the top of the experimental frame.

Each end of the basic bar is provided with two connecting holes, and the connecting head is provided with holes matching the two connecting holes at one end.

Compared with the prior art, the utility model has the following advantages:

Various forms of spatial structure models can be combined with rods and joints, and the overall static and dynamic test experiments can be carried out on the spatial structure model, which can test and evaluate the overall performance of the spatial structure; the whole set of experimental equipment is simple in structure, It is easy to combine and has various functions, which can not only stimulate students' interest in learning, but also exercise students' hands-on ability.

Description of drawings

The following is a brief description of the content expressed in the drawings of this manual and the marks in the drawings:

Fig. 1 is a structural schematic diagram of the overall space structure mechanics experiment device of the present invention.

Fig. 2 is a schematic diagram of the frame structure of the space structure mechanics experiment device of the present invention.

Fig. 3 is a schematic diagram of the structure of the polished rod of the present invention.

Fig. 4 is a schematic diagram of the screw rod structure of the utility model.

Fig. 5 is a structural schematic diagram of the loading mechanism of the present invention.

Fig. 6 is a first schematic diagram of the structure of the space to be tested in the utility model.

Fig. 7 is the second schematic diagram of the structure of the space to be tested in the utility model.

Fig. 8 is a first schematic diagram of the structure of the connecting joint of the present invention.

Fig. 9 is the second structural schematic diagram of the connection joint of the present invention.

In the figure: 1. Experimental base platform, 2. Experimental bar system in the space to be tested, 21. Support, 22. Basic bar, 23. Connecting joint I, 24. Connecting joint II, 3. Experimental frame column, 4. Experiment Frame beam, 5. Experimental frame joint, 6. Rack and pinion rotating mechanism, 61. Polished rod, 62. Handle wheel Ⅰ, 63. Limit wheel Ⅰ, 64. Transmission gear, 7. Screw drive mechanism, 71. Screw rod , 72. Handle wheel Ⅱ, 73. Limit wheel Ⅱ, 74. Smooth section round shaft, 8. Loading mechanism, 81. Ball indenter, 82. Length adjustment rod, 83. Smooth through hole, 84. Threaded hole, 85 .loading platform, 86. dynamometer, 87. threaded rod, 88. loading handwheel.

Detailed ways

The specific implementation of the present utility model will be described in further detail below by describing the embodiments with reference to the accompanying drawings.

As shown in Figures 1 to 9, the experimental device for space structure mechanics includes a space experimental frame, a loading mechanism 8, and a space test rod system 2 to be measured, wherein the space test rod system 2 to be measured is a three-dimensional frame structure, including The experimental base platform 1, the experimental frame column 3, the experimental frame beam 4, and the experimental frame joint 5, the experimental base platform 1 is a flat structure, and a set of positioning holes are set on the flat structure, and the positioning holes are used for the experimental rods of different structures to be tested. The installation and positioning of the system, the bottoms of the four experimental frame columns 3 are fixed at the four corners of the experimental base platform, the tops of the four experimental frame columns 3 are connected by the experimental frame beams 4, and the ends of the adjacent experimental frame beams at the top are connected by the experimental The frame joint 5 is fixed to form a three-dimensional frame structure, and the three-dimensional frame structure has high strength.

A support 21 is fixed on the experimental base platform 1, through which the experimental bar system in the space to be measured is fixed, and the support is installed and fixed through the positioning holes on the experimental base platform. The experimental bar system in the space to be measured is a three-dimensional bar frame structure. The experimental bar system in the space to be measured includes a basic bar 22 and a connecting joint. The connecting joint is provided with a group of protruding connectors. match. Each end of the basic rod is provided with two connection holes, and the connection head is provided with holes matching the two connection holes at one end. When the two holes at one end of the basic member and the two holes in the same direction of the connecting joint are connected with bolts, it becomes a rigid connection; when the two holes at one end of the basic member and the two holes in the same direction of the connecting joint are connected with only one bolt When joined, it becomes a hinge. The basic rods and connecting joints can be connected into different forms of three-dimensional structures according to the experimental requirements. The experimental rod system in the space to be measured is fixed on the support through the lower end of the basic rods located at the lower part.

The connecting joint is provided with three or four branched connecting heads or more than four branched connecting heads. Among them, there are three branched connectors on the connecting joint, and the adjacent connecting heads are at right angles. The joint structure formed is the connecting joint II 24; They are all at right angles, and the formed joint structure is the joint joint I23, or the joint joints of four branches form other joint structures.

The connecting joints can be different according to the connection requirements of the experimental bar system in the space to be measured. The connecting joints can be provided with multiple branched joints with different directions and angles, and the joints can be sleeves. The cross-section of the sleeve hole is the same as that of the basic rod, and the cross-section can be circular or square.

The experimental rod system of the space to be tested is set on the experimental base platform 1 of the experimental frame, and the loading mechanism is set on the top of the experimental frame which can move in the top plane of the experimental frame, and the loading mechanism acts on the experimental rod system of the space to be measured through the pressure head.

The loading mechanism is positioned at the top of the experimental rod system in the space to be measured. The loading mechanism 8 includes a threaded rod 87, a loading hand wheel 88, a loading platform 85, and a dynamometer 86. The threaded rod 87 passes through a vertical screw hole on the loading platform 85, and the loading hand wheel Wheel 88 is located at the top of the threaded rod, the pressure head is located at the lower end of the threaded rod, and the sensor of the dynamometer is located between the threaded rod and the pressure head. A length adjustment rod 82 is arranged between the threaded rod and the indenter, and the height of the indenter relative to the platform of the experimental base is adjusted through the length adjustment rod, so as to adapt to different heights of the experimental rod system in the space to be measured. The indenter is a ball indenter 81, and the balls at the bottom of the indenter can move on the experimental bar system in the space to be tested, so as to realize mobile loading, and then perform dynamic experimental tests.

A polished rod 61 and a screw rod 71 are arranged side by side between a pair of experimental frame crossbeams on the top of the test frame, and a smooth through hole 83 and a threaded hole 84 are arranged side by side on the loading platform. The polished rod 61 passes through the smooth through hole on the loading platform, and the screw rod 71 through the threaded holes on the loading platform.

The test frame beam 4 is provided with a chute, the chute is embedded with a rack, and the end of the polished rod is provided with a transmission gear 64. The transmission gear cooperates with the rack on the test frame beam to form a rack and pinion rotating mechanism 6, which drives the loading platform Lateral movement, that is, movement along the length of the experimental frame beam. One end of the polished rod is provided with a handle wheel I62, which is convenient for rotating the polished rod, and the other end of the polished rod is provided with a limit wheel I63.

Screw mandrel 71 two ends are all provided with a section of smooth section circular shaft 74, and the smooth section circular shaft at screw mandrel two ends is movably located in the chute of experiment frame beam. One end of the screw mandrel is provided with a handle wheel II72, and the other end of the screw mandrel is provided with a limit wheel II73. The screw rod cooperates with the loading platform to form a screw drive mechanism 7. By rotating the handle wheel II 72, the screw rod is driven to rotate, and the loading platform is driven to move axially along the screw rod.

The load movement realizes lateral movement through the rack and pinion mechanism, and realizes longitudinal movement through the screw drive mechanism, and finally realizes the movement of the loading system at any point in the plane of the entire experimental platform, and realizes the moving load mechanics experiment; when not moving, realizes the static Mechanics experiment test.

A vibrator is installed on the platform of the experimental base, and the experimental bar system in the space to be tested is loaded through the vibrator to carry out dynamic experiments.

Basic rods and joints can be combined to form a variety of space truss structures, rigid frame structures and composite structures, and a variety of solid models can be established, and overall static and dynamic mechanical tests can be performed on the solid model, which can test the overall spatial structure. performance evaluation.

The utility model has been exemplarily described above in conjunction with the accompanying drawings. Obviously, the specific implementation of the utility model is not limited by the above-mentioned method, as long as various insubstantial improvements are adopted based on the concept and technical solutions of the utility model, or there is no Those who directly apply the idea and technical solution of the utility model to other occasions through improvement are within the protection scope of the utility model.

Claims (10)

1. a space structure dynamics experimental device, it is characterized in that: comprise the experimental framework in space and load maintainer and Space Experiments leverage to be measured, described Space Experiments leverage to be measured is located on the experiment base platform of experimental framework, described load maintainer can the top being located at experimental framework of movement in experimental framework top planes, and described load maintainer is acted on Space Experiments leverage to be measured by pressure head.

2. space structure dynamics experimental device as claimed in claim 1, it is characterized in that: described load maintainer comprises threaded rod, loads handwheel, weighted platform, dynamometer, described threaded rod is through the screw on weighted platform, described loading handwheel is located at threaded rod top, pressure head is located at threaded rod lower end, and the sensor of dynamometer is located between threaded rod and pressure head.

3. space structure dynamics experimental device as claimed in claim 1, it is characterized in that: described experimental framework top is provided with polished rod and screw mandrel side by side, polished rod is through the unthreaded hole on load maintainer, screw mandrel is through the threaded hole on load maintainer, polished rod end is provided with transmission gear, and experimental framework top is provided with the tooth bar suitable with transmission gear.

4. space structure dynamics experimental device as claimed in claim 1, is characterized in that: described pressure head is ball pressure head.

5. space structure dynamics experimental device as claimed in claim 1, it is characterized in that: described Space Experiments leverage to be measured comprises basic rod member and connecting joint, described connecting joint is provided with the connector of one group of projection, and end and the connector of described basic rod member are suitable.

6. space structure dynamics experimental device as claimed in claim 1, is characterized in that: described experiment base platform is provided with one group of pilot hole for locating Space Experiments leverage to be measured.

7. space structure dynamics experimental device as claimed in claim 2, is characterized in that: be provided with length adjustment bar between described threaded rod and pressure head.

8. space structure dynamics experimental device as claimed in claim 3, it is characterized in that: one end of described polished rod and screw mandrel is equipped with handle wheel, the other end of polished rod and screw mandrel is equipped with position-limited wheel.

9. space structure dynamics experimental device as claimed in claim 3, it is characterized in that: described screw mandrel two ends are equipped with one section of smooth section circular shaft, the smooth section circular shaft at screw mandrel two ends is movably located on experimental framework top.

10. space structure dynamics experimental device as claimed in claim 5, it is characterized in that: described basic rod member is often held and is equipped with two connecting holes, described connector is provided with the hole suitable with two, one end connecting hole.