CN108193833B - A kind of cantilever beam structure - Google Patents
A kind of cantilever beam structure Download PDFInfo
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- CN108193833B CN108193833B CN201711166468.8A CN201711166468A CN108193833B CN 108193833 B CN108193833 B CN 108193833B CN 201711166468 A CN201711166468 A CN 201711166468A CN 108193833 B CN108193833 B CN 108193833B
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C3/20—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of concrete or other stone-like material, e.g. with reinforcements or tensioning members
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/13—Architectural design, e.g. computer-aided architectural design [CAAD] related to design of buildings, bridges, landscapes, production plants or roads
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/17—Mechanical parametric or variational design
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
- G06F2119/06—Power analysis or power optimisation
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Abstract
The invention discloses a kind of cantilever beam structures, belong to load-carrying construction part technical field.The cantilever beam structure includes fixed part, girder, load muscle, the defeated power muscle of two loading units and load duct；One end end lower surface of girder is vertically fixedly connected with fixed part；The girder other end is equipped with the load loading hole for penetrating its upper and lower surfaces, and girder lower surface is equipped with the defeated power muscle of two loading units in the two sides of load loading hole；The defeated power muscle of two loading units is intersected in load duct, and is fixedly connected with the outer wall in load duct；The duct for loading duct is opposite with the duct position of load loading hole.The present invention devises one kind preferable cantilever beam structure of bearing capacity in limited load space, and guarantee that the delivering path of power is efficient, by the design of load muscle so that stress is uniformly dispersed, alleviation stress raisers avoid causing cantilever beam to damage because local stress is excessive.Cantilever beam structure of the present invention is suitable as load-carrying construction part.
Description
Technical field
The present invention relates to a kind of cantilever beam structures, belong to load-carrying construction part technical field.
Background technique
Cantilever beam structure is a kind of relatively conventional structure in engineering, is even more normal especially in Machine Design, architectural design
See.Cantilever beam structure in the actual use process, is often subjected to various concentrfated loads, distributed load, moment of flexure and torque
Effect, is likely to generate biggish stress and deformation at any one place of beam, so that cantilever beam structure destroys or failure.
Therefore it is particularly important to cantilever beam structure how to realize that joist support loading capability is maximized.
Summary of the invention
To solve cantilever beam structure in the prior art in use, due to bearing various concentrfated loads, distribution is carried
The effect of lotus, moment of flexure and torque is likely to generate biggish stress and deformation, so that cantilever beam at any one place of beam
Structure is destroyed or the problem of failure, the present invention provides a kind of cantilever beam, the structure of the cantilever beam can joist support loading capability it is strong, lead to
Cross rational design and to improve structure stress make cantilever beam reasonable stress in use, it is not easy to be destroyed, have compared with
Long service life, the scheme specifically used are as follows:
A kind of cantilever beam structure, the cantilever beam structure include fixed part 1, girder 2, load muscle 3, the defeated power muscle of two loading units
4 and load duct 5；Wherein: one end end lower surface of girder 2 is vertically fixedly connected with fixed part 1；2 other end of girder is set
There is the load loading hole 7 for penetrating its upper and lower surfaces, and 2 lower surface of girder is equipped with two in the two sides of load loading hole 7
The defeated power muscle 4 of loading unit；The defeated power muscle 4 of two loading units is intersected in load duct 5, and is fixedly connected with the outer wall in load duct 5；
The duct for loading duct 5 is opposite with the duct position of load loading hole 7.
The load muscle 3 includes the first load muscle 31, the second load muscle 32, third load muscle 33, the 4th load muscle 34, and the
Five load muscle 35, the 6th load muscle 36 and the 7th load muscle 37；Wherein: one end of the first load muscle 31 is fixedly connected on fixed part
1 and girder 2 junction；One end of second load muscle 32 is fixedly connected on the one end of fixed part 1 far from girder 2；First load
The other end of muscle 31 is intersected at one and is fixedly connected with the other end of the second load muscle 32；One end of third load muscle 33 is solid
Surely it is connected to the junction of fixed part 1 and the second load muscle 32；One end of 4th load muscle 34 is fixedly connected on the first load muscle
31 and second load muscle 32 junction, the other end of the 4th load muscle 34 is fixedly connected with the other end of third load muscle 33；
One end of 5th load muscle 35 is fixedly connected on the junction of third load muscle 33 and the 4th load muscle 34, and the other end is fixedly connected
On the outer wall in load duct 5；One end of 6th load muscle 36 is fixedly connected on the first load muscle 31, the second load muscle 32,
The junction that crosses of four load muscle 34, the other end are fixedly connected on the lower surface of girder 2；One end of 7th load muscle 37 is fixed to be connected
It connects in the junction of the 6th load muscle 36 and girder 2, the other end is fixedly connected on the 5th load muscle 35 and load 5 outer wall of duct
Junction.
Further, the fixed part 1, girder 2, load muscle 3, the defeated power muscle 4 of two loading units and 5 one of load duct add
Work molding.
Further, the cantilever beam structure further includes a reinforcing rib 6；The reinforcing rib 6 passes through the first load muscle 31
Midpoint, the midpoint of the second load muscle 32 and the midpoint of third load muscle 33, and one end is fixedly connected on third load muscle 33
Midpoint, the other end are fixedly connected on 2 lower surface of girder.
Further, the fixed part 1, girder 2, load muscle 3, the defeated power muscle 4 of two loading units load duct 5 and add
Strengthening tendons 6 are integrally machined molding.
Further, many places lightening hole 8 is equipped with inside the girder 2；The lightening hole 8 is evenly distributed on inside girder 2.
Further, the cantilever beam structure uses photosensitive resin material.
Further, the angle between the first load muscle 31 and the second load muscle 32 is 48.3 °；Second load muscle 32
Angle between the 4th load muscle 34 is 83.9 °；Angle between 4th load muscle 34 and the 6th load muscle 36 is 134.2 °；
Angle between 6th load muscle 36 and the first load muscle 31 is 93.6 °；Between third load muscle 33 and the 4th load muscle 34
Angle is 48.2 °；The angle of 4th load muscle 34 and the 5th load muscle 35 is 85.1 °；5th load muscle 35 and the 7th load muscle
Angle between 37 is 50.8 °；Angle between 7th load muscle 37 and the 6th load muscle 36 is 90 °；The first load muscle
It is in 58 ° between 31 and fixed part 1；Formed acute angle is 54.4 ° between the 6th load muscle 36 and girder 2；Described 7th holds
Formed acute angle is 35.6 ° between power muscle 37 and girder 2；Formed acute angle between the defeated power muscle 4 of two loading units and girder 2
It is 73.3 °.
Further, the height of the fixed part 1 is 50mm；The total length of the girder 1 is 160mm；Described first
Load muscle 31, the second load muscle 32, third load muscle 33, the 4th load muscle 34, the 5th load muscle 35, the 6th load muscle 36 and
It is 6mm that the thickness of seven load muscle 37, which is 4mm, width,；The internal diameter in the load duct 5 is 6.5mm；The load position 9
For 2 region leading portion 30mm × 30mm of girder.
The invention has the advantages that:
The present invention is designed by reasonable structure, in conjunction with cantilever beam in loading process stress, strain distribution and variation
Trend analysis fully considers the delivering path of stock utilization and power in the design, designs one in limited load space
The kind preferable cantilever beam structure of bearing capacity, and guarantee that the delivering path of power is efficient, it avoids power and walks " injustice in transmission process
Road in vain ", so that distance is shorter under the premise of same starting point, same destination, displacement are identical.Pass through the design of load muscle
So that stress is uniformly dispersed, alleviates stress raisers, avoid causing cantilever beam to damage because local stress is excessive.
The cantilever beam structure that the present invention designs has modified overall structure, and also remove some does not have in the design process substantially
The muscle of the component of endurance, and then the effect of loss of weight is played, and in the place addition reinforcing rib that stress is concentrated, improve to reach
The purpose of structure stress can obviously improve model structure stress concentration phenomenon.It is found through experiments that reinforcing rib passes through first simultaneously
Improve when the midpoint at the midpoint of load muscle, the midpoint of the second load muscle and third load muscle structure stress effect is best and energy
It is enough preferably to improve model structure stress concentration phenomenon.
Detailed description of the invention
Fig. 1 structure optimization topic schematic diagram.
Fig. 2 load loads schematic diagram.
Fig. 3 load loading pad schematic diagram.
The load-carrying efficiency of tetra- kinds of typical structures of Fig. 4.
Fig. 5 cantilever beam structure three-dimensional simulation figure.
Fig. 6 loss of weight and structure optimization.
Fig. 7 local strengthening muscle Optimization simulation figure.
Fig. 8 local feature Optimized Simulated figure.
The simulation of Fig. 9 load muscle reinforcement structure.
Figure 10 moulded dimension mark and partial sectional view (it is mm that dimensional units, which are not marked in figure).
Figure 11 model partial sectional view.
The stress distribution trend of Figure 12 different loads drag.
The Strain Distribution trend of Figure 13 different loads drag.
The stress distribution trend of Figure 14 different loads drag.
Figure 15 Construction of A Model schematic diagram；
(1, fixed part；2, girder；3, load muscle；31, the first load muscle；32, the second load muscle；33, third load muscle；
34, the 4th load muscle；35, the 5th load muscle；36, the 6th load muscle；37, the 7th load muscle；4, the defeated power muscle of loading unit；5, load
Duct；6, reinforcing rib；7, load loading hole；8, lightening hole；9, load position).
Specific embodiment
The present invention will be further described combined with specific embodiments below, and following embodiment will be helpful to the technology of this field
Personnel further understand the present invention, but the invention is not limited in any way.
In the description of the present invention, it should be noted that term " center ", " longitudinal direction ", " transverse direction ", "upper", "lower",
The orientation or positional relationship of the instructions such as "front", "rear", "left", "right", "top", "bottom", "inner", "outside" and " endways " is based on attached
Orientation or positional relationship shown in figure, is merely for convenience of description of the present invention and simplification of the description, rather than indication or suggestion is signified
Device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as to the present invention
Limitation.
In the description of the present invention, it should be noted that unless otherwise expressly provided and limit, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be to be directly connected to, can also be indirectly connected with by intermediary, can be the connection of two components interiors.For this field
Those of ordinary skill for, the concrete meaning of above-mentioned term in the present invention can be understood with concrete condition.
In addition, in the description of the present invention, unless otherwise indicated, " multiple ", " multiple groups ", " more " be meant that two or
It is more than two.
Known prescribed requirement is as follows: (1) for design domain as shown in Figure 1, fixing end and total width do not limit, model is pre-
Stay loading hole (diameter D is not less than 6.2mm)；(2) material volume consumption≤35ml, material properties are shown in Table 1；(3) load loads: adding
It carries screw rod to pass through loading hole and fix by nut, loads and hang counterweight below screw rod, there is a 30mm between nut and test block
The load that × 30mm and center are provided with the hole that diameter is 6.5mm loads special-purpose cushion, for the dispersion to loaded concentrated force, load
Load schematic diagram as shown in Figure 2；(4) loading hole hole depth is not more than 70mm, and load loads special-purpose cushion as shown in figure 3, modelling
In to consider load load special-purpose cushion place needed for space.
Configuration theory is as shown in figure 4, Design of Cantilever Beam requires: designing a kind of cantilever beam of structure optimization, makes to carry energy
Overcoming may maximize.The delivering path for fully considering stock utilization and power guarantees that the delivering path of power is efficient, power is avoided to exist
" longer way " is walked in transmission process, makes same starting point, and it is shorter to be displaced distance in identical situation for same destination.For
The length that the size of the flowing of power, distance i.e. power is moved multiplied by force flow.Such measurement standard, for gravitational load be as
This, for lateral load and so.The following are the comparisons of four kinds of structures, wherein P: tensile stress, C: compression.Following four
The purpose of structure: the power that size is 1P is communicated up the length of 1B, T+C is the efficiency of structure, it is seen that a kind of last structure
The efficiency highest of Fig. 4 (d).
Cantilever beam structure is imagined: carrying out Preliminary design model, model by four kinds of cantilever beam frame structures that front is introduced
As shown in Figure 5.Its object is to guarantee that the delivering path of power is efficient, bearing capacity optimization is realized.It can be tied on the basis of this model
It closes analog result and carries out structure optimization.
1 photosensitive resin material mechanical property of table and 3D printing operational characteristic
When simulating the effect of cantilever beam structure stress, Abaqus software is selected to carry out structure stress and deformation analysis.Input
Material properties and calculation method in software: 1. density of material: 1.16g/cm3, Young's modulus: 2650MPa, Poisson's ratio: 0.41；
2. cross-sectional shape: entity, homogeneous；3. analysis step type: static(al), general, maximal increment step number: 500；4. load type: pressure,
Load position 30mm × 30mm reserved area；5. boundary condition type: being completely fixed two end faces up and down being bonded with tooling；⑥
Grid division: cell configuration is tetrahedron, and approximate global sizes are 2；7. analyzing program: Abaqus/Standard.
Fig. 6 (a), (b) are to bear under same load, the stress distribution schematic diagram of model.By scheming (a) it can be seen that cantilever
The component that three muscle of beam flat plate top are not withstood forces substantially, can remove it；Three muscle stress close to left side are obvious, and having must
Reinforcing rib is further added to it to guarantee cantilever beam integral strength.By scheming (b) it can be seen that three, top muscle is gone
The effect that loss of weight can be played after removing can obviously improve model structure stress by the place addition reinforcing rib concentrated in stress and concentrate
Phenomenon.
In Fig. 7 (a), (b) simulation process, load is all made of 0.2MPa, is evenly distributed at the 30mm × 30mm of leading portion region,
Model optimization is carried out by adjusting the position of arrow meaning muscle.It can be seen that stress concentration portion position is basic from two groups of analog results
It is identical, but the components of stress have different at Local Integral point, and local stress component maximum value is 29.29MPa in figure (a),
Scheming local stress component maximum value in (b) is 36.59MPa, it is seen that frame structure of the frame structure of figure (a) better than figure (b).
Fig. 8 (a), (b), in (c) simulation process, load is all made of 0.2MPa, be evenly distributed on leading portion region 30mm ×
At 30mm, model optimization is carried out by adjusting arrow meaning feature.It can be seen that figure (b) is at (a) from three groups of analog results
On the basis of by unilateral 0.5 ㎜ of thickening of arrow meaning muscle, though the components of stress of muscle are alleviated everywhere, planar top left-hand portion
Stress concentrates significant and local stress value larger, causes very big loss to overall structural strength；It is carried out at the signified arrow of figure (c)
Structure fine tuning, discovery stress significantly concentrate on right side leading portion, and this stress distribution trend can generate structure integrated carrying ability
Adverse effect.
In Fig. 9 (a), (b) simulation process, load is all made of 0.2MPa, is evenly distributed at the 30mm × 30mm of leading portion region,
Model optimization is carried out by adjusting local feature.It can be seen that figure (b) is added on the basis of (a) from two groups of analog results
Arrow meaning reinforcing rib.It is characterized in that: addition muscle is through load three muscle the most significant and addition muscle is held by three
The midpoint of power muscle.From in analog result it can be seen that figure (b) in the local maxima components of stress be less than figure (a) in local maxima answer
Force component, under the premise of meeting model needs quality, model topology optimization success.
Figure 10 is that moulded dimension marks explanation.The planar size marking of model main view in figure, wherein what is marked is several
Place's emphasis size is all satisfied design requirement.
Figure 11 is the partial sectional view of model, thick including many places lightening hole, fixed position, load position, load muscle
Model internal structure section view can simply be embodied overall structure composition by the explanation such as degree.
Figure 12 (a), (b), (c), in (d) simulation process, load is gradually incremented by using change of gradient mode, respectively
0.2MPa, 0.25MPa, 0.28MPa, 0.33MPa are evenly distributed at the 30mm × 30mm of leading portion region.From four groups of analog results
In when can be seen that load is 0.2MPa, components of stress maximum value is 24.28MPa at Local Integral point；When load is 0.25MPa,
Components of stress maximum value is 30.35MPa at Local Integral point；When load is 0.28MPa, the components of stress are maximum at Local Integral point
Value is 33.99MPa；When load is 0.33MPa, components of stress maximum value is 40.06MPa at Local Integral point.Used in 3D printing
Photosensitive resin Resisting fractre intensity is 33.8MPa~40.2MPa, it is seen that when application load is 0.33MPa, that is, loads counterweight maximum pole
When freight weight limit amount is more than 29.7kg, structural instability fracture.
In Figure 13 (a), (b) simulation process, 0.28MPa, 0.33MPa is respectively adopted in load, is evenly distributed on leading portion region
At 30mm × 30mm.When can be seen that load is 0.28MPa from two groups of analog results, the components of strain are maximum at Local Integral point
Value is 1.3%；When load is 0.33MPa, components of strain maximum value is 1.5% at Local Integral point.The simulation knot of two groups of data
Fruit, which is respectively less than, is bent elongation percentage 3% and fracture elongation 6%.As it can be seen that answering variation at Local Integral point within the scope of allowable load
Amount is all satisfied Resisting fractre requirement.
Abscissa chooses ten groups of different loads (0.2MPa~0.35MPa) in Figure 14, and ordinate corresponds to model local stress
Component value.By observing Resisting fractre intensity threshold, the limiting value for applying load can be obviously determined.
34.967 ㎜ of Optimized model total volume3, model gross mass 40.56g.
In conclusion obtaining the cantilever beam of following several structures by above-mentioned design process:
Embodiment one
As shown in Figure 10,11 and 15, which includes fixed part 1, girder 2, load muscle 3, and two loading units are defeated
Power muscle 4 and load duct 5；Wherein: one end end lower surface of girder 2 is vertically fixedly connected with fixed part 1；Girder 2 is another
End is equipped with the load loading hole 7 for penetrating its upper and lower surfaces, and 2 lower surface of girder is equipped in the two sides of load loading hole 7
The defeated power muscle 4 of two loading units；The defeated power muscle 4 of two loading units is intersected in load duct 5, and fixes with the outer wall in load duct 5
Connection；The duct for loading duct 5 is opposite with the duct position of load loading hole 7；
Load muscle 3 includes the first load muscle 31, and the second load muscle 32, third load muscle 33, the 4th load muscle 34, the 5th holds
Power muscle 35, the 6th load muscle 36 and the 7th load muscle 37；Wherein: one end of the first load muscle 31 is fixedly connected on 1 He of fixed part
The junction of girder 2；One end of second load muscle 32 is fixedly connected on the one end of fixed part 1 far from girder 2；First load muscle 31
The other end be intersected at one and be fixedly connected with the other end of the second load muscle 32；One end of third load muscle 33 is fixed to be connected
It connects in the junction of fixed part 1 and the second load muscle 32；One end of 4th load muscle 34 be fixedly connected on the first load muscle 31 with
The other end of the junction of second load muscle 32, the 4th load muscle 34 is fixedly connected with the other end of third load muscle 33；5th
One end of load muscle 35 is fixedly connected on the junction of third load muscle 33 and the 4th load muscle 34, and the other end, which is fixedly connected on, to be added
On the outer wall for carrying duct 5；One end of 6th load muscle 36 is fixedly connected on the first load muscle 31, the second load muscle the 32, the 4th is held
The junction that crosses of power muscle 34, the other end are fixedly connected on the lower surface of girder 2；One end of 7th load muscle 37 is fixedly connected on
The junction of 6th load muscle 36 and girder 2, the other end are fixedly connected on the connection of the 5th load muscle 35 with load 5 outer wall of duct
Place.
Present embodiment middle girder 2 is used as load principal plane, connects loading unit (the defeated power muscle 4 of two loading units and loading hole
Road 5) and as load core part, load muscle 3 further strengthens load ability, prevents due to cantilever for dispersing stress
Beam local pressure is excessive and destroys.Fixed part 3 can be clamped for fixing by fixing tool.It loads duct 5 and is used as stress knot
It puts and guarantees that load loads.
Embodiment two
Present embodiment is on the basis of embodiment one to fixed part 1, girder 2, load muscle 3, and two loading units are defeated
The connection type in power muscle 4 and load duct 5 further limits, and fixed part 1 in present embodiment, girder 2, load muscle 3, two add
The defeated power muscle 4 in load portion and load duct 5 are integrally machined molding, and such processing method makes the structural strength higher.
Embodiment three
Present embodiment is a piece reinforcing rib 6 of increase on the basis of the cantilever beam structure of embodiment one or two；This reality
The increased reinforcing rib 6 of mode is applied across the midpoint of the first load muscle 31, the midpoint of the second load muscle 32 and third load muscle 33
Midpoint, and one end is fixedly connected on the midpoint of third load muscle 33, the other end is fixedly connected on 2 lower surface of girder.
It can achieve the purpose of improvement structure stress by locally adding reinforcing rib 6 in load muscle in present embodiment, it is bright
It is aobvious to improve model structure stress concentration phenomenon, guarantee the integral strength of cantilever beam.
Embodiment four
Present embodiment is on the basis of embodiment three to fixed part 1, girder 2, load muscle 3, and two loading units are defeated
Power muscle 4, the connection type for loading duct 5 and reinforcing rib 6 further limit, fixed part 1 in present embodiment, girder 2, load muscle
3, the defeated power muscle 4 of two loading units, loads duct 5 and reinforcing rib 6 is integrally machined molding, and such processing method makes the structural strength
It is higher.
Embodiment five
Increase technical characteristic on the basis of present embodiment is any one embodiment in embodiment one to four to subtract
Repeated hole 8 can be equipped with many places lightening hole 8 inside the girder 2 of present embodiment；Lightening hole 8 is evenly distributed on inside girder 2.It should
Lightening hole 8 can reduce the own wt of cantilever beam.
Embodiment six
Present embodiment is material on the basis of any one embodiment of embodiment one to five to cantilever beam structure
Material further limits, and the cantilever beam structure in present embodiment can use photosensitive resin material.
Embodiment seven
Present embodiment is further limited to the size in embodiment one to six in any one embodiment, this reality
Applying the angle between the first load muscle 31 and the second load muscle 32 described in mode is 48.3 °；Second load muscle 32 is held with the 4th
Angle between power muscle 34 is 83.9 °；Angle between 4th load muscle 34 and the 6th load muscle 36 is 134.2 °；6th load
Angle between muscle 36 and the first load muscle 31 is 93.6 °；Angle between third load muscle 33 and the 4th load muscle 34 is
48.2°；The angle of 4th load muscle 34 and the 5th load muscle 35 is 85.1 °；Between 5th load muscle 35 and the 7th load muscle 37
Angle be 50.8 °；Angle between 7th load muscle 37 and the 6th load muscle 36 is 90 °；The first load muscle 31 with it is solid
Determine between portion 1 in 58 °；Formed acute angle is 54.4 ° between the 6th load muscle 36 and girder 2；The 7th load muscle 37
Formed acute angle is 35.6 ° between girder 2；Formed acute angle is between the defeated power muscle 4 of two loading units and girder 2
73.3°。
The size limited in present embodiment can guarantee that cantilever beam structure has preferable load effect, the cantilever beam structure energy
It is enough to realize that bearing capacity is promoted in limited load space, and guarantee that the delivering path of power is efficient, it avoids power and is transmitting
" longer way " is walked in the process, so that distance is shorter under the premise of same starting point, same destination, displacement are identical.Pass through
So that stress is uniformly dispersed, alleviation stress raisers avoid leading to cantilever beam because local stress is excessive for the design of load muscle
Damage.
Embodiment eight
It is that the other sizes in embodiment seven are further limited in present embodiment, as shown in Figure 10, this embodiment party
The height of fixed part 1 is 50mm in formula；The total length of the girder 1 is 160mm；The first load muscle 31, the second load muscle
32, the thickness of third load muscle 33, the 4th load muscle 34, the 5th load muscle 35, the 6th load muscle 36 and the 7th load muscle 37 is equal
It is 6mm for 4mm, width；The internal diameter in the load duct 5 is 6.5mm.
Present embodiments provide for a kind of preferably embodiment, the size that present embodiment limits can preferably cooperate
The angle limited in embodiment seven, so that cantilever beam obtains better intensity, stress disperses more evenly, have preferably carrying
Ability, and guarantee that the delivering path of power is efficient.
Although the present invention has been disclosed in the preferred embodiment as above, it is not intended to limit the invention, any to be familiar with this
The people of technology can do various changes and modification, therefore protection of the invention without departing from the spirit and scope of the present invention
Range should subject to the definition of the claims.
Claims (8)
1. a kind of cantilever beam structure, which is characterized in that the cantilever beam structure includes fixed part (1), girder (2), load muscle
(3), the defeated power muscle (4) of two loading units and load duct (5)；Wherein: one end end lower surface of girder (2) is vertically fixedly connected
There is fixed part (1)；Girder (2) other end is equipped with the load loading hole (7) for penetrating its upper and lower surfaces, and under girder (2)
Surface is equipped with the defeated power muscle (4) of two loading units in the two sides of load loading hole (7)；The defeated power muscle (4) of two loading units, which is intersected in, to be added
It carries duct (5), and is fixedly connected with the outer wall of load duct (5)；Load the duct and load loading hole (7) of duct (5)
Duct position is opposite；
The load muscle (3) includes the first load muscle (31), the second load muscle (32), third load muscle (33), the 4th load muscle
(34), the 5th load muscle (35), the 6th load muscle (36) and the 7th load muscle (37)；Wherein: one end of the first load muscle (31)
It is fixedly connected on the junction of fixed part (1) and girder (2)；
One end of second load muscle (32) is fixedly connected on the one end of fixed part (1) far from girder (2)；
The other end of first load muscle (31) is intersected at one and is fixedly connected with the other end of the second load muscle (32)；
One end of third load muscle (33) is fixedly connected on the junction of fixed part (1) Yu the second load muscle (32)；
One end of 4th load muscle (34) is fixedly connected on the junction of the first load muscle (31) Yu the second load muscle (32), and the 4th
The other end of load muscle (34) is fixedly connected with the other end of third load muscle (33)；
One end of 5th load muscle (35) is fixedly connected on the junction of third load muscle (33) and the 4th load muscle (34), another
End is fixedly connected on the outer wall of load duct (5)；
One end of 6th load muscle (36) is fixedly connected on the first load muscle (31), the second load muscle (32), the 4th load muscle
(34) the junction that crosses, the other end are fixedly connected on the lower surface of girder (2)；
One end of 7th load muscle (37) is fixedly connected on the junction of the 6th load muscle (36) and girder (2), and the other end is fixed
It is connected to the 5th load muscle (35) and loads the junction of duct (5) outer wall.
2. cantilever beam structure according to claim 1, which is characterized in that the fixed part (1), girder (2), load muscle
(3), the defeated power muscle (4) of two loading units and load duct (5) are integrally machined molding.
3. cantilever beam structure according to claim 1, which is characterized in that the cantilever beam structure further includes a reinforcing rib
(6)；The reinforcing rib (6) passes through the midpoint of the first load muscle (31), the midpoint of the second load muscle (32) and third load muscle
(33) midpoint, and one end is fixedly connected on the midpoint of third load muscle (33), the other end is fixedly connected on girder (2) following table
Face.
4. cantilever beam structure according to claim 3, which is characterized in that the fixed part (1), girder (2), load muscle
(3), the defeated power muscle (4) of two loading units, loads duct (5) and reinforcing rib (6) is integrally machined molding.
5. cantilever beam structure according to claim 1, which is characterized in that be equipped with many places lightening hole inside the girder (2)
(8)；It is internal that the lightening hole (8) is evenly distributed on girder (2).
6. cantilever beam structure according to claim 1, which is characterized in that the cantilever beam structure uses photosensitive resin material
Material.
7. cantilever beam structure according to claim 1, which is characterized in that the first load muscle (31) and the second load muscle
(32) angle between is 48.3 °；Angle between second load muscle (32) and the 4th load muscle (34) is 83.9 °；4th holds
Angle between power muscle (34) and the 6th load muscle (36) is 134.2 °；Between 6th load muscle (36) and the first load muscle (31)
Angle be 93.6 °；Angle between third load muscle (33) and the 4th load muscle (34) is 48.2 °；4th load muscle (34)
Angle with the 5th load muscle (35) is 85.1 °；Angle between 5th load muscle (35) and the 7th load muscle (37) is
50.8°；Angle between 7th load muscle (37) and the 6th load muscle (36) is 90 °；The first load muscle (31) and fixation
It is in 58 ° between portion (1)；Formed acute angle is 54.4 ° between the 6th load muscle (36) and girder (2)；7th load
Formed acute angle is 35.6 ° between muscle (37) and girder (2)；Between the defeated power muscle (4) of two loading units and girder (2) institute at
Acute angle be 73.3 °.
8. cantilever beam structure according to claim 7, which is characterized in that the height of the fixed part (1) is 50mm；It is described
The total length of girder (1) is 160mm；The first load muscle (31), the second load muscle (32), third load muscle (33), the 4th
The thickness of load muscle (34), the 5th load muscle (35), the 6th load muscle (36) and the 7th load muscle (37) is that 4mm, width are equal
For 6mm；The internal diameter of load duct (5) is 6.5mm.
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| JP3215956B2 (en) * | 1992-02-03 | 2001-10-09 | フドウ建研株式会社 | Precast concrete beams |
| JP2004293181A (en) * | 2003-03-27 | 2004-10-21 | Shimizu Corp | Opening reinforcing structure of beam |
| CN203594163U (en) * | 2013-11-29 | 2014-05-14 | 哈尔滨理工大学 | Reinforced concrete force bearing beam |
| CN104765922A (en) * | 2015-04-13 | 2015-07-08 | 西北工业大学 | Method for topological optimization design of cantilever beam structure based on shape-preserved constraints |
| CN105804317A (en) * | 2016-04-14 | 2016-07-27 | 成都佳美嘉科技有限公司 | Construction beam structure |
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