CN101535570A - Portable vibratory screed with bubble vial inclination indication system - Google Patents
Portable vibratory screed with bubble vial inclination indication system Download PDFInfo
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- CN101535570A CN101535570A CNA2007800220809A CN200780022080A CN101535570A CN 101535570 A CN101535570 A CN 101535570A CN A2007800220809 A CNA2007800220809 A CN A2007800220809A CN 200780022080 A CN200780022080 A CN 200780022080A CN 101535570 A CN101535570 A CN 101535570A
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- scraper plate
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- screed
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- vibratory screed
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Abstract
A portable vibratory screed (10) includes a blade (12) that is connected to a handle (28) constructed to be manipulated by an operator. Nodes (112, 113, 115, 116) of minimum vibrational amplitude are formed at specific locations along the length of the blade when the exciter is driven at a rated operating speed. A site level (164) and/or the handle (28) is attached to the blade (12) at or in the vicinity of one or more of these nodes, therefore, is relatively isolated from induced vibrations.
Description
The related application that relates to
The application requires the U.S. Provisional Patent Application No.60/804 with " portable vibratory screed " by name submitted on June 15th, 2006, and 847 is priority, and its disclosed content has been included in this literary composition.
Technical field
Present invention relates in general to a kind of screed that is used for the concrete leveling, particularly relate to a kind of portable vibratory screed that has the high parts of vibration sensing degree, for example, a kind of inclination indication system of economy and/or handle are arranged at and can avoid vibrative position between the leveling operational period.Screed can comprise a sharp blade structure or and then also dispose a damping means.
Background technology
In the process of concreting, comprise that the material of aggregate, cement and water is poured onto the three unities, this place is surrounded by template, to hold concrete material.When concrete is transported to dumping ground, many being called as, the labourer of " Beater operator (puddlers) " used such as rake, and the instrument of come-along and/or shovel makes balanced concrete divide the height of batching near anticipation.Equally, other labourers generally are equipped with a slice plank or other is called as the straight object of " strickle (strike-off) ", and mobile strickle is crossed concrete material.The artificial process of wipeing concrete material off is all material integrators, and big aggregate is in below the height after finishing.Can make gradient or " gradient " of concrete shaping surface equally for anticipation.Surface finish after finishing depends on manually-operated strickling technology to a great extent, and in addition, manually wipeing concrete material off needs a large amount of labours, needs a large amount of skills and experiences to guarantee final surface finish and suitable gradient simultaneously.
The appearance of this portable vibratory screed has reduced required artificial of smooth concrete material in a large number.Portable vibratory screed generally comprises vibration induction structure and the one or more handle that stretches out from scraper plate that is connected on plate or the scraper plate.Vibrational structure generally comprises " vibrator " that is formed by electric motor driven one or more eccentric weights.The operation of vibrating mechanism is frozen into one with concrete material, like this, and at wet concrete surface mobile scraper, the oscillating mode scraper plate is in below the material surface big aggregate, generation is commonly called " slurry " by the heavy viscous material that less aggregate forms, to form the final surface of material.The operator directly affects the planeness and the gradient on the final surface of material to the rigidity of the control of handle and scraper plate, and correspondingly, the operator controls the planeness that the ability of the scraper plate gradient or the gradient and direction that scraper plate moves and speed are determining final material.
In order to reduce the vibration that transfers to operator's hand from vibrating mechanism, a kind of spacer assembly (as a rubber bushing) is usually placed between the afterbody and scraper plate of handle., this spacer assembly provides nonideal reaction for the motion of handle, because such spacer assembly is out of shape when handle motion, therefore, only some is passed on the scraper plate effect of handle motion.Correspondingly, this spacer assembly ability that Board position is scraped in operator control has a negative impact.
The height of final material also depend on usually the operator with such as the height of template (form) with reference to the relevant visual response highly of finishing.Though portable vibratory screed assemblies is known, it comprises various inclination indication systems, and these systems are generally at the targeted customer.Many inclinations and height system comprise laser system.But many such systems can not solve handle with respect to the gradient of scraper plate basal surface and then the scraper plate location with respect to the scraper plate basal surface.Thereby such laser elevation system only obtains some success, promptly indicates the operator should move the direction of hand to obtain a height and/or the gradient consistent with desirable height suitably.In addition, to be attached in the screed be very expensive for this laser elevation and pitch system.From the angle of making, these expenses generally not only submitted to the customer but also with this system required service with maintain relevant.
In addition, in such as U.S. Pat 4752156 disclosed other systems, there is relatively cheap inclinator (as site level) to be used to indicate the orientation of screed.A kind of site level is known as bubbler tube usually, has the glass tube that is encased in the bubble in the liquid by one and forms.When the bubbler tube level, bubble is in the centre of pipe, and when bubbler tube relatively moved the direction inclination, then bubble rose towards an end or an other end.But as U.S. Pat 6758631 was disclosed, when the vibrator assembly operation, such indicator was not very successful at the inclination place of indication screed.In other words, the vibration that produces during the work of vibrator assembly is transmitted to bubbler tube and falls into oblivion the bubble of level gauge, make bubbler tube like water off a duck's back, above-mentioned US6758631 patent is reached a conclusion: show that with bubbler tube or site level the gradient of scraper plate is can not be received when scraping.
Summary of the invention
According to one aspect of the present invention, operator's handle and at least one in the site level are installed on the scraper plate of portable vibratory screed at such node place or near this node place, promptly, when the service speed (for example nominal drive speed of vibrator) when being driven of vibrator according to design, the vibrations induced amplitude minimum at this node place, therefore can be to a great extent with this member with may to the operator make troubles or vibration that the bubble in the site level is broken isolated.
The scraper plate of screed can be arranged to make distortion and bending along its length to minimize.Such structure provides roughly even and smooth final surface, and provides high sensitive for the operator operates the screed handle.By being provided to scraper plate, the shape of cross section that can strengthen screed rigidity realizes above-mentioned effect.For example, when cross-sectional direction is seen, scraper plate can be to be roughly b shape.
Another aspect of the present invention discloses a kind of method that forms the lightweight screed, and comprising provides the scraper plate that is configured to accept the vibrator assembly.When vibrator is driven with the speed of appointment, forms the node of minimum amplitude along the length of scraper plate in specific location, and locate or near it operator is bearing in hand and the site level at least one on the scraper plate at one of these nodes.
Many others of the present invention, feature and advantage will be able to clear in conjunction with the accompanying drawings from following detailed description.
Description of drawings
Accompanying drawing shows the best way that realizes expection of the present invention, in the drawings:
Fig. 1 is that the axle that waits of portable vibratory screed according to an embodiment of the invention is schemed;
Fig. 2 is that the axle that waits of one of operator position of the portable vibratory screed shown in Fig. 1 is schemed;
Fig. 3 is the lateral view of the part of the operator control position shown in Fig. 2;
Fig. 4 is the elevation of installation basic components of the laser leveling system of the portable vibratory screed shown in Fig. 1;
Fig. 5 is the phantom drawing of the vibrational system of the portable vibratory screed shown in Fig. 1;
Fig. 6 is that the axle that waits of the vibration nodal point of the portable vibratory screed shown in Fig. 1 is schemed;
Fig. 7 is the vibration schematic diagram of the portable vibratory screed shown in Fig. 1;
Fig. 8 is the end view of the portable vibratory screed shown in Fig. 1;
Fig. 9 is the diagram of the tilt operation of the portable vibratory screed shown in Fig. 1; With
Figure 10-the 12nd, the alternate embodiment of lightweight screed of the present invention, this screed is equipped with the inclination indication system based on site level.
The specific embodiment
Fig. 1 shows portable vibratory screed 10 according to an embodiment of the invention.Portable vibratory screed 10 comprises plate or the scraper plate 12 that is connected with vibrating device 14.First operator's station 16 is connected with scraper plate 12 with second operator's station 18.In one embodiment, operator's station 16 and 18 comprises laser leveling system 20,22 and handle assembly 24,26 separately.Be understandably, though show two operator's stations, screed 10 can be configured in single operator's structure, and this structure comprises the single handle assembly near the length direction center of scraper plate 12.Each handle assembly 24,26 comprises a handle 28 that is configured to by operator's cooperation.Handle tube 30 extends between handle 28 and scraper plate 12.Handle tube 30 scraper plates directly are rigidly connected to scraper plate 12 by handle installation bracket 32.Support (kickstand) 34 is pivotably connected to each handle tube 30, and keeps portable vibratory screed 10 to be in the position of approximate vertical or running when non-the use.When portable vibratory screed 10 work, clip 36 is attached to each handle tube 30 and is configured to admit support 34 in wherein, thereby removes concrete materials with support 34 in the process of concrete measurement of the level.
As shown in Figure 8, end plate 118 is connected to each end 120,122 of scraper plate 12.End plate 118 surrounds a rectangular substantially cavity 136, thereby guarantees that the material of being scraped can not be deposited in the cavity of portable vibratory screed 10.Equally as shown in Figure 8, handle installation bracket 32 and post (mast) base 42 can be offset mutually along the width 137 of scraper plate 12.The handle installation bracket 32 of handle component 24,26 is roughly aimed at along width 137, and the post base 42 of laser leveling system 20,22 is also aimed at along the width 137 of scraper plate 12.The post base 42 of the handle installation bracket 32 of handle component 24,26 and laser leveling system 20,22 can be located in any position along the width 137 of the top wall 134 of scraper plate 12, keeps the node location of installing component simultaneously.
Fig. 9 and Figure 10 show the amount of deflection and the twisting resistance of scraper plate 12.As shown in Figure 9, the operator 138 of handle 28 can keep 140 one-tenth levels in 124 relative stiffnesses surface, side of scraper plate 12 by operating grip 28.Referring to Fig. 8 and Fig. 9, operator 138 is operating grip 28 in a clockwise direction, and the length direction 110 along scraper plate 12 between leading edge 60 and surface 140 forms roughly the same spacing.Correspondingly, scraper plate 12 is configured to resist torsion and the bending force that therefore causes.Such structure guarantees that the major part of scraper plate 12 is responsive to 28 reactions of operator's operating grip.
Compare with magic power scraper plate (MagicScreed) with the known blade structure that Wacker Corporation sells on market, shown in this article and described scraper plate structure has been equipped with the operating parameter of following enhancing:
Table 1
| Former scraper plate | Wacker Corporation standard scraper plate | The wide scraper plate of Wacker Corporationkuan | The magic power scraper plate | |
| Principal moments of inertia (Ix) (in 4) | 7.27 | 1.97 | 2.39 | 1.97 |
| Moment of flexure maximum value (in.lb) | 1.4×10 5 | 2.56×10 4 | 2.99×10 4 | 2.56×10 4 |
| Maximum torque capacity (in. 1b) | 124×10 3 | 3.54×10 3 | 4.16×10 3 | 3.54×10 3 |
As above shown in the table, compare with known plated construction, the structure of scraper plate 12 has greatly improved the maximum torque capacity that principal moments of inertia, moment of flexure maximum value and scraper plate 12 can bear.
In the operating process of portable vibratory screed 10, scraper plate 12 moves along arrow 58 indicated directions or the direction that scrapes, crosses the material for the treatment of that standard is put down, wipeed off or plasters.When the operator wants to improve height, or improve the gradient, handle 28 rotated up, make by this more material from leading edge 60 below by.On the contrary, when the operator wants to reduce height, or the cutting gradient, handle 28 is rotated down reduces leading edge 60, reduce the height of finishing material by this.The position of the leading edge 60 of scraper plate 12 is controlled the operation of handle 28 by the operator.
The trailing edge 62 of scraper plate 12 " floating (float) " material, thus the surface texture of material finished.That is to say that because scraper plate 12 moves the surface of crossing water-bearing concreae, scraper plate 12 is in big aggregate and finishes surperficial below, and the slurry of rising material.
A plurality of bars (grab bar) 46 are attached to the upper surface of scraper plate in spaced relation.Bar 46 is configured and is configured to help the operator or promotes and/or transport portable vibration formula screed 10 effectively such as elevator, anti-skidding loader, crane or similar auxiliary equipment.Be understandable that the portable characteristics of screed 10 shows and can operate and transport screed with minimum manpower.
Referring to figs. 2 and 3, laser leveling system 20 and 22 is identical basically.Descriptive system 20 is proved to be such description and is equally applicable to system 22 now.As shown in Figure 2, laser leveling system 20 is connected on the scraper plate 12 by post base 42 and telescopic mast 38.Telescopic mast 38 provides variable distance between laser leveling system 20,22 and scraper plate 12.Each telescopic mast 38 comprises first end 40, and the post base 42 that this first end 40 is rigidly connected on the scraper plate 12 is admitted.Laser leveling system 20 comprises the receiver 66 that operatively is connected with controller 68.Preferably, in the measurement of the level process, receiver 66 and controller 68 operationally provide the inclination indication of scraper plate 12.
In first embodiment, receiver 66 is preferably taked the form of sensor eye, the reference laser (not shown) acting in conjunction that this sensor eye is outer with being fixed in scraper plate, and reference laser projects laser beam with the predetermined reference height.Reference laser is preferably the laser of 360 degree, and it produces plane laser projection, makes sensor eye can receive the reference signal of sending from any place.Preferably, sensor eye also has the receiving system of 360 degree, and when screed was worked in different positions, sensor eye also can receive the reference laser signal, and does not need it is turned to reference laser like this.Laser sensor hole and reference laser are technology well-known in the art.
In operation process, sensor eye receives 360 signals of spending that reference laser sends.Sensor eye to the operator show be higher than, be lower than or level in reference signal.The operator just can make corresponding adjustment, thereby guarantees that sensor eye remains on the suitable horizontal plane.
Show best that as Fig. 2 and Fig. 3 inclination sensor 72 is connected to the handle tube 30 near handle 28.The inclination sensor 72 rotation number of degrees (with arrow 74 represent) of handle 28 that are configured to communicate by letter with respect to the axis (representing) of scraper plate 12 with arrow 76.Guaranteed in the operating process of portable vibratory screed 10 by the receiver 66 of inclination sensor 72 on the handle 24,26 and laser leveling system 20, the operative association that controller 68 is formed, laser leveling system 20 adjusts its output, thereby is not operated the person with handle 28 74 influences of rotation with respect to axis 76.Inclination sensor can comprise the electronics inclinometer that is installed in any orientation so that its measure screed with the major axis plane orthogonal of scraper plate in vertical (fore-aft) tilt.
As shown in Figure 3, in one embodiment, fixed support 78 is fixed to inclination sensor 72 handle tube 30 of the operating side 80 of close handle assembly 24.Such orientation can guarantee this laser leveling system 20 in response to handle 28 with respect to the relatively little deviation in the position of scraper plate 12.Fixed support 78 adjustable grounds are installed on the handle tube 30, provide zero reading (, clinometer is parallel to the ground) thereby can be set to when screed 10 is in desirable operation gradient.Such installation site provides the simple reference point that keeps the screed gradient for the operator.
As shown in Figure 4, laser pickoff 66 comprises that the receive window 86 and the ON/OFF of the laser signal of the Desired Height that is configured to receive expression scraper plate 12 adjust switch 88.Controller 68 is connected to telescopic mast 38 and is operably connected with inclination sensor 72, as shown in Figure 3.Receiver 66 and controller 68 contain a cutout screen 90,92 respectively, and these cutout screens are configured to be used for showing the relative altitude of scraper plate 12.That is to say in operating process, warning and/or signal that efferent 90 and 92 provides vision, the sense of hearing or sense of touch for the operator of portable vibratory screed 10 indicate to the operator whether finishing of material is surperficial is on the height of an anticipation by this.From the too high indication of the height of laser leveling system 20, can show to the operator handle should be rotated down to remove material from finishing the surface; Show the indication of the height that highly is lower than expectation, can show to the operator needs the rising handle to pass through from scraper plate 12 belows to allow more material, finishes the height on surface thereby raise.Each operation position 16,18 is equipped with laser leveling system 20,22 respectively, to allow each operator independently to determine and to adjust scraper plate 12 and the relative position of finishing material, so that in whole height and/or the gradient that keeps anticipation in the process of building.Crooked or the distortion of the non-anticipation of the b type cross section of scraper plate 12 opposing this moment, but can not stop the operator crooked wittingly or reverse scraper plate 12 with adjust the material that meshed with scraper plate one end with respect to the height and the levelness of the material of scraper plate other end engagement.
Relevant other details that is applied to laser leveling of the present invention system is open in U.S. Patent application No.2004/0071509, and the theme of quoting this patent in this article as a reference.
What Fig. 5 showed is the phantom drawing of the vibration gauge 14 of portable vibratory screed 10.See well that from Fig. 5 vibration gauge 14 comprises the motor 100 that is operatively coupled to throttle cable 82.Protective cover 102 is connected on the scraper plate 12, and prevents that throttle cable 82 is exposed to the coagulation material that splashes in the concreting process on the scraper plate 12.Pedestal 104 is supported on scraper plate 12 tops with motor 100, and allow between place vibrator assembly 106.In the process of motor 100 runnings, vibrator assembly 106 is constructed such that the rotation of one or more eccentric masses (invisible) influences the vibration of scraper plate 12.The vibration of scraper plate 12 adds reality and flattens the material of process thereunder.Motor 100, extension backing plate 104 and vibrator assembly 106 are configured to isolate the vibration of not expecting of motor 100 and scraper plate 12.Other details of the shockproof structure of installation component is at U.S. Patent application No.10/773, and is open in 012, quotes this theme in this article as a reference.
Vibration gauge 14 is positioned at the center near scraper plate 12, and causes the sinusoidal vibration ripple in the scraper plate 12, as among Fig. 7 shown in 113.Sine wave comprises a plurality of points or node, is minimum value at the amplitude of these points or node place scraper plate 12.These minimum or minimum vibration nodal points are two-way spaced apart from vibration gauge 14 along the length of scraper plate 12.According to the screed design of being given, the quantity of these nodes and the position of each node also can be thought identical with the output speed of motor by the speed that the is driven decision of vibrator.In the most of the time of operation, motor drives vibrator with " specified running speed ", and this speed is designed to use under the situation outside the non-common condition.The exploitation speed that specified running speed reaches in the time of can being the throttling arrangement running at full capacity, also can be near but be lower than the greatest limit RPM of motor.In illustrated embodiment, when motor during with the running of the specified running speed of the vibrator of about 7500RPM, four " specified running nodes " of minimum amplitude 112,113,115 and 116 are arranged at interval along the length of 14 ' scraper plate.All nodes form (115,116) (112,113) and second with first, and center on the center symmetric arrays of scraper plate 12.The external node 112,116 of each group and internal node 113,115 lay respectively at from the position of the corresponding outer end distance 16.8 " and 64.8 " of scraper plate 12.
Shown in Fig. 6 and 10, handle fixed support 32 and base for post 42 are installed near the node place that obtains with the vibrator running speed of setting or its separately, preferentially are installed near specified running node 112,116 positions that obtain with specified vibrator running speed or its.Laser leveling system 20,22,150 and handle assembly 24,26,162 are connected one of specified running node near scraper plate 12, just a vibrating isolation system needn't be installed between laser leveling system 20,22 and/or handle assembly 24,26 and scraper plate 12 again.That is to say, separate the sleeve except in the coupling assembling of handle or laser navigation system, being equipped with, the link position of handle assembly 24,26,162 and/or laser leveling system 20,22 or measurement of the level system 150 is definite along the length 110 of scraper plate 12, and is chosen as the low oscillation point at the course of normal operation middle scraper 12 of portable vibratory screed 10.So the rigidity installing plate 117 that is used for handle 24 or 26 can directly be fixed to the top board 134 of scraper plate 12 by bolt or alternate manner, as shown in Figure 6.Such structure decrease portable vibratory screed 10 number of components and simplified its assembling process.In addition, such structure has improved the controlled and maneuverability of portable vibratory screed 10.
Figure 10-12 shows the another kind of interchangeable embodiment of the measurement of the level system 150 that uses with portable vibratory screed 10, and it has been drawn the sinusoidal vibration ripple and has had the specified running node 112,113,115 of minimum amplitude and 116 advantage.Be, more measurement of the level system 150 to be set according to the quantity of the operator position that is associated with screed 10 although only show a measurement of the level system 150 with being appreciated that.Similar to measurement of the level system 20,22, measurement of the level system 150 comprises the receiver 152 that is operably connected on the controller 154, and is configured to pass on to the operator height and position of scraper plate 156.Telescopic mast 158 is connected to scraper plate 156 with receiver 152 and controller 154.Inclination indication system 160 is directly connected on the scraper plate 156, or connects by a handle 162 as present embodiment.Inclination indication system 160 comprises by pivot plate 166 and is connected to site level or bubbler tube 164 on the handle 162.Pivot plate 166 is connected on the handle 162 by pivot 168, and is configured to make the orientation of plate 166 to fix with respect to scraper plate 156.As shown in figure 11, bubbler tube 164 comprises housing 170 with fluid 172 volumes and the bubble 178 that is closed in wherein.The reference line 174,176 that housing 170 comprises a plurality of relative spacings that show bubbler tube 164 with.That is to say that bubbler tube 164 has fixing orientation with respect to the levelness of scraper plate 156, the operator can easily obtain scraper plate 156 inclination in the running direction by visual inspection bubbler tube 164.Bubble 178 has been passed on the gradient of scraper plate 156 with respect to the operator with respect to the position of reference line 174,176.Bubble 178 shows that by the degree of line 174 handle assembly 162 rotates up, thereby more material is passed through for 156 times from scraper plate.On the contrary, bubble 178 shows that by the degree of line 176 handle assembly 162 is rotated down, thereby the performance and the degree of material or gradient step-down operation are cut off in expression.When bubble 178 is calibrated with aligning scraper plate 156, keep showing that the horizontal movement of screed 10 is by building material between the bubble 178 online 174,176.Correspondingly, pitch system 150 provides the flexible, dynamic of inclined degree of scraper plate 156 to show.
Because site level is installed (at least indirectly) near the minimum amplitude node 112,113,115 that is not subjected to the high-amplitude vibration or 116 places or its, complete bubble 178 runs through the opereating specification of screed 10.That is to say that even in the leveling operating process, bubble 178 remains air pocket relatively uniformly in liquid 172 inside, thereby the operator can easily observe bubble 178.
Be that under the situation of not considering additional vibratory, handle 24,26 and/or site level 164 can be from specified running node skews separately with being appreciated that.That is to say, in that embodiment, the two ends spacing that the bubble vial inclination system 160 (Figure 11) that is equipped with is installed in scraper plate 12 is on the node 112,116 of 427mm, bubble vial inclination system 160 can be connected on the scraper plate 12 in first range 180, and this first range is generally defined as from moving along any lateral deviation of the node of scraper plate 12 apart from the distance that is no more than about 50～70mm.This distance is equivalent to bubble vial inclination system 160 and can moves from corresponding specified running node 112 or 116, and keeps the integrality of bubble with the specified running speed of motor.
The various variations of being done in the scope of following claim all are predictable, are with particularly pointing out, and the present invention can be regarded as in theme required for protection.
Claims (17)
1, a kind of portable vibratory screed comprises:
The scraper plate that is used for planarizing material;
Vibrator, when driving with the velocity of rotation of appointment, this vibrator produces vibration wave in scraper plate, this vibration wave longitudinal separation all nodes place amplitude minimum of arranging each other on scraper plate; And
One of all nodes locate or near be bearing at least one handle and site level on the scraper plate.
2, portable vibratory screed as claimed in claim 1 is characterized in that, handle one of described node locate or near be installed on the scraper plate.
3, portable vibratory screed as claimed in claim 2 is characterized in that, site level is connected in handle.
4, portable vibratory screed as claimed in claim 2 is characterized in that, also be included in another node place or near be installed in another handle on the scraper plate and be connected to another site level near the screed of another handle.
5, portable vibratory screed as claimed in claim 4 is characterized in that, described second place level gauge is attached to the second in command.
6, portable vibratory screed as claimed in claim 3 is characterized in that, also comprises site level is bearing in fixed support on the handle, and described fixed support is connected to screed movably with the orientation of calibration with respect to the observation water plane of scraper plate.
7, portable vibratory screed as claimed in claim 1 is characterized in that, also comprises showing the laser leveling system of scraping plate height.
8, portable vibratory screed as claimed in claim 1 is characterized in that, described scraper plate is reinforced to resist bending or distortion at its main position at least.
9, portable vibratory screed as claimed in claim 8 is characterized in that, the shape of cross section of described scraper plate is roughly similar to lowercase b at least.
10, a kind of portable vibratory screed comprises:
Scraper plate;
Vibrator, when driving with the velocity of rotation of appointment, this vibrator produces vibration wave in scraper plate, and this vibration wave is along the length of scraper plate longitudinal separation all nodes place amplitude minimum of arranging each other; And
The handle of first and second longitudinal separations, each handle one of all nodes locate or near be directly installed on the scraper plate, and each handle is configured by independent operator and handles; And
First and second site level, each in first and second site level is installed on the corresponding handle, and is formed in the scraper plate vibration processes and indicates flight pitch.
11, portable vibratory screed as claimed in claim 10, it is characterized in that, also comprise first and second fixed supports, each support is pivotally supported at corresponding hydrolevelling device on the corresponding handle, to allow the position of calibration hydrolevelling device with respect to scraper plate..
12, portable vibratory screed as claimed in claim 10, it is characterized in that, also comprise the measurement of the level system that has transmitter and be configured to be attached to the receiver of portable vibratory screed, transmitter is configured to remotely locate with respect to scraper plate, and recipient is communicated by letter with transmitter and built the height of material with demonstration.
13, portable vibratory screed as claimed in claim 10 is characterized in that, described scraper plate is reinforced to resist bending or distortion at its main position at least.
14, portable vibratory screed as claimed in claim 13 is characterized in that, the shape of cross section of described scraper plate is roughly similar to lowercase b at least.
15, a kind of method that forms the lightweight screed comprises:
Scraper plate is provided;
The vibrator assembly is installed on scraper plate;
Determine the node location of minimum amplitude, when the vibrator assembly moved with the velocity of rotation of appointment, described node location formed along the length of scraper plate; And
Supporting operator's handle and at least one in the site level near one of all nodes.
16, method as claimed in claim 15 is characterized in that, the supporting step comprises and handle is attached to scraper plate and site level is installed on the handle.
17, method as claimed in claim 16 is characterized in that, the second in command and second place level gauge is bearing on the scraper plate near also being included in another nodes of all nodes.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US80484706P | 2006-06-15 | 2006-06-15 | |
| US60/804,847 | 2006-06-15 | ||
| US11/763,239 | 2007-06-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101535570A true CN101535570A (en) | 2009-09-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007800220809A Pending CN101535570A (en) | 2006-06-15 | 2007-06-14 | Portable vibratory screed with bubble vial inclination indication system |
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| Country | Link |
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| CN (1) | CN101535570A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104727559A (en) * | 2015-03-05 | 2015-06-24 | 潍坊华铃柴油机动力有限公司 | Concrete levelling machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104727559A (en) * | 2015-03-05 | 2015-06-24 | 潍坊华铃柴油机动力有限公司 | Concrete levelling machine |
| CN104727559B (en) * | 2015-03-05 | 2018-02-06 | 潍坊华铃柴油机动力有限公司 | Concrete screed |
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