CN205037874U - Detection apparatus for be used for fork truck portal amount of deflection to measure - Google Patents
Detection apparatus for be used for fork truck portal amount of deflection to measure Download PDFInfo
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- CN205037874U CN205037874U CN201520362081.XU CN201520362081U CN205037874U CN 205037874 U CN205037874 U CN 205037874U CN 201520362081 U CN201520362081 U CN 201520362081U CN 205037874 U CN205037874 U CN 205037874U
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- laser pen
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- door frame
- fixed
- deep bead
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Abstract
The utility model relates to a detection apparatus for be used for fork truck portal amount of deflection to measure. Branch and supplementary rope including laser pen, coupling mechanism, cantilever form, the laser pen suspends in midair in one side of branch through coupling mechanism, and the laser pen is the slope form with the vertical direction, and laser - firing port is downward, the one end of supplementary rope is fixed locate the deep bead on, the other end is flagging naturally, branch is being connected to the upper end of deep bead, and is located the rear of laser pen, and assists the rope correspondence to be located the dead astern of laser pen. Be used for examining time measuring, the opposite side of branch is fixed on keeping off goods shelves, and it is shaft -like to be the level, the laser - firing port of laser pen faces toward flagging naturally the dragging to ground of the other end of fork truck portal the place ahead ground, supplementary rope. The utility model discloses the device is used for detecting and does not receive indoor outdoor restriction, also can measure in outdoor windy condition, greatly reduced the influence of environment to measuring the amount of deflection.
Description
Technical field
The utility model belongs to fork truck technical field, is specifically related to the measurement of forklift door frame amount of deflection.
Background technology
Due to reasons such as machining precision, roller gap and stress deformations, cause pallet fork to produce forward displacement together with gear shelf, namely this displacement is said door frame amount of deflection in industry.At present, the method for forklift door frame deflection metrology is vertical method, and the method is mainly carried out in indoor, vertical is fixed on gear shelf on go forward side by side line home position mark, then keep off shelf rise to door frame top; Now, vertical together moves forward with gear shelf and again marks, then the distance of twice vertical mark position is exactly door frame deflection value.
Vertical method measures forklift door frame amount of deflection Problems existing: can only carry out under the environment that indoor are definitely calm, but the high door frame of more than 12.5 meters then cannot be measured in indoor because chamber height limits.Even if test shows that outdoor wind is very little, but because door frame is high and pedal line is very long, so very little wind also can have a huge impact measurement result.Gu vertical method is infeasible in outdoor measurement high door frame amount of deflection.In addition, high door frame pedal line is long, so vertical balance comparatively difficulty, namely uses its balance of Hand supplementary also to need the longer time just can reach stable, if there is a disturbance balance to be namely broken.
Utility model content
In order to solve Problems existing in forklift door frame deflection metrology, the utility model provides a kind of pick-up unit for forklift door frame deflection metrology.
Pick-up unit for forklift door frame deflection metrology comprises laser pen hitch and laser range finder; Described laser pen hitch comprises laser pen 8, bindiny mechanism, cantilever-shaped pole 1 and auxiliary ropes 10; Described laser pen 8 is suspended in the side of pole 1 by bindiny mechanism, laser pen 8 and vertical direction are skewed, and Laser emission mouth is downward; One end of described auxiliary ropes 10 is fixed on deep bead 9, and the other end of auxiliary ropes 10 naturally droops; The upper end of described deep bead 9 is connected to pole 1, and is positioned at the rear of laser pen 8, and auxiliary ropes 10 correspondence is positioned at the dead astern of laser pen 8;
During for detecting, the opposite side of the pole 1 of described laser pen hitch is fixed on the gear shelf of tested forklift door frame, and pole 1 is shaft-like in level, and is parallel to gear shelf front end face; The Laser emission mouth of laser pen 8 faces toward the ground in forklift door frame front; Described laser range finder correspondence is placed on immediately below the pallet fork of laser pen hitch side.
Described bindiny mechanism comprises U-shaped fixture block 7, web joint 6, mounting blocks 5, fixed block 4 and cotton thread 2; Described web joint 6 is in vertical, and U-shaped fixture block 7 is fixed on the bottom of web joint 6, and laser pen 8 is installed on U-shaped fixture block 7; Mounting blocks 5 is fixed on the web joint 6 above U-shaped fixture block 7; The top cooperation of described mounting blocks 5 is fixed with fixed block 4, and described cotton thread 2 is fixed on fixed block 4, and the two ends of cotton thread 2 respectively connected pole 1, makes bindiny mechanism be hanging like.
Described deep bead 9 is in horizontal U-board shape, and bindiny mechanism is positioned at the middle part of deep bead 9, and the emergent light end of laser pen 8 correspond to the opening part of deep bead 9.
Described auxiliary ropes 10 is the flexible rope of diameter 0.1 ~ 0.2cm.
One end of auxiliary ropes 10 point of fixity on deep bead 9 is higher than the end face of the fixed block 4 in bindiny mechanism, and difference in height is more than 10mm.
Described cotton thread 2 is the cotton thread of diameter 0.1 ~ 0.2cm.
Advantageous Effects of the present utility model embodies in the following areas:
1. the utility model device is for detecting not by the restriction of indoor and outdoor, has the condition of wind also can measure in outdoor, greatly reduces environment to the impact of measuring amount of deflection.
2. the laser pen of this device is arranged to and there is angle (arbitrarily angled between 0 ° to 90 ° in theory, not containing 0 °) on ground, need not manage to require that laser pen just can obtain deflection value perpendicular to ground.This makes measuring process very simple.For measuring facilitate and considering measuring error, laser pen and vertical direction angle is recommended to be 26.5 ° ~ 30 ° here.
3. test proves, the auxiliary cotton thread of this device can make rapidly laser pen hitch reach steady state (SS) or do small simple harmonic motion, and this small simple harmonic motion can find equilibrium position point by let us easily, and in measuring error allowed band.
4., when the uncertainty of OA is ± 1 millimeter, the uncertainty of OB is ± 4 millimeters, and the uncertainty of OC is ± 1 millimeter, and when the uncertainty of h2-h1 is ± 2.5 millimeters, the error of door frame deflection metrology result is ± 14.9 millimeters.Test proof can meet measuring accuracy requirement.If each measuring accuracy improves further, result will be more accurate.
5. this device adopts two cotton threads to hang (this is because we are only concerned about door frame amount of deflection in the longitudinal direction, so limit the rotary freedom of laser pen apparatus horizontal direction), can effectively stop laser pen to do unnecessary rotary motion.Improve testing efficiency and accuracy.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation;
Fig. 2 is the utility model detailed structure schematic diagram;
Fig. 3 is the original state figure for detecting;
When Fig. 4 is for detecting, pick-up unit is raised to the constitutional diagram at door frame top;
Fig. 5 is measuring principle figure.
Sequence number in upper figure: pole 1, cotton thread 2, briquetting 3, fixed block 4, mounting blocks 5, web joint 6, U-shaped fixture block 7, laser pen 8, deep bead 9, auxiliary ropes 10, door frame 11, gear shelf 12, pallet fork 13, laser range finder 14.
Embodiment
The theoretical formula of the utility model institute foundation is derived and is described as follows:
As seen from Figure 5, when measurement mechanism is in M
1during position, C point is the Laser emission mouth of laser pen 8, the vertical point that O point is C point, and A point is that now laser gets to ground point.When gear shelf and pallet fork 13 are from M
1position rises to extreme higher position M
2time, due to door frame distortion and rigging error etc., gear shelf and pallet fork are by M
2be displaced to M
3position, laser pen hitch moves forward thereupon, and now D point is Laser emission mouth, the vertical point that F point is D point, and B point gets to ground point for laser.Because the device cotton thread of fixed laser pen 8 is sling, as long as the center of gravity of installing the hitch of laser pen 8 is constant, the tiltangleθ of laser pen 8 is constant.So horizontal range CE is door frame deflection value.
Make straight line CH and be parallel to OB, hand over DF in E point, mistake E is EG and is parallel to DB, then has DF ∥ OC as previously mentioned, ∠ OCA=∠ FDB, by the known CE=AG of geometric relationship, and AG=OB-OA-GB, again because GB=EH=DEtan θ, and tan θ=OA/OC.
So deflection value:
(1)
Wherein
,
So
(2)
CE in formula (2) is high door frame deflection value.
Below in conjunction with accompanying drawing, by embodiment, the utility model is further described.
Embodiment
See Fig. 1 and Fig. 5, the pick-up unit for forklift door frame deflection metrology comprises laser pen hitch and laser range finder 14.Laser range finder 14 is hand-held laser rangefinder.Laser pen hitch comprises laser pen 8, bindiny mechanism, cantilever-shaped pole 1 and auxiliary ropes 10.Laser pen 8 is suspended in the side of pole 1 by bindiny mechanism, and laser pen 8 and vertical direction are skewed, and Laser emission mouth is downward.
Bindiny mechanism comprises U-shaped fixture block 7, web joint 6, mounting blocks 5, fixed block 4 and cotton thread 2.Web joint 6 is in vertical, and U-shaped fixture block 7 is fixed on the bottom of web joint 6, and laser pen 8 is installed on U-shaped fixture block 7, sees Fig. 2; Mounting blocks 5 is fixed on the web joint 6 above U-shaped fixture block 7; The top cooperation of mounting blocks 5 is installed with fixed block 4, and cotton thread 2 is fixed on fixed block 4, and the two ends of cotton thread 2 respectively connected pole 1, makes bindiny mechanism be hanging like.Cotton thread 2 is the cotton thread of diameter 0.2cm.
Deep bead 9 is in horizontal U-board shape, and bindiny mechanism is positioned at the middle part of deep bead 9, and the Laser emission mouth of laser pen 8 correspond to the opening part of deep bead 9.The upper end of deep bead 9 is connected to pole 1, and is positioned at the rear of laser pen 8.
Auxiliary ropes 10 is the flexible rope of diameter 0.2cm, and one end is fixedly installed on deep bead 9, and point of fixity is higher than the end face of the fixed block 4 in bindiny mechanism, and difference in height is 10mm.The other end naturally droops; Auxiliary ropes 10 correspondence is positioned at the dead astern of laser pen 8.
The measurement operation that the utility model is used for three grades of door frame amounts of deflection of 12.5 meters high is as follows:
1. travel vehicle to be measured to physical features esplanade, vehicle is fully loaded with, and guarantees that fork truck be fully loaded with and still keep stable when rising to top, adjusts outer portal frame of forklift, make door frame be in plumbness by inclinometer.
2. see Fig. 3, measurement mechanism is arranged on gear shelf 12, the height about 300 millimeter of Laser emission mouth bottom pallet fork 13 of laser pen 8.Adjustment laser pen 8 is 28 ° with the angle of vertical direction, after installing, gear shelf 12 is risen to pallet fork apart from about 1.7 meters, ground height, measures original state see Fig. 3.With the hand steered laser pen hitch surely rocked, find Laser emission mouth C point with vertical, see Fig. 5, to the vertical point O point on ground, the O point in Fig. 5, and mark with marking pen.
3., see Fig. 5, measure OC height with meter ruler, survey and average for three times, OC=1992 millimeter.
4., see Fig. 5, laser pen 8 now can the round spot of incident point A, A point to be a radius be 3 millimeter on the ground, measures the distance OA of the center of circle to O point of laser spots A, surveys and average for three times, OA=1194 millimeter.
5. see Fig. 5, laser range finder 14 is placed on immediately below pallet fork 13, to measure pallet fork apart from floor level h1.Recommend to be placed on immediately below the pallet fork of laser pen hitch side.And laser range finder set-point and laser range finder are done zone marker (in order to result is accurate in pallet fork institute dotted areas, measure near the height of pallet fork root position apart from ground) as far as possible, when the object of mark is that door frame rises to top, also laser range finder range finding is used in this position, reduce error, h1=1696 millimeter.
6., see Fig. 4, door frame is risen to extreme higher position M
2, now due to reasons such as door frame distortion and manufacture rigging errors, gear shelf 12 and pallet fork 13 are by M
2position is displaced to M
3position, laser pen hitch moves thereupon, and acutely swings.Tractive auxiliary ropes 10, time initial, because auxiliary ropes 10 is fixed on deep bead 9, do not contact with laser pen hitch, the point of fixity of auxiliary ropes 10 is higher than laser pen hitch.So stretching auxiliary ropes 10 makes it close towards laser pen hitch around point of fixity, touch laser pen hitch gradually, until laser pen hitch stops swinging, illustrate that laser pen hitch deviate from equilibrium position under the effect of auxiliary ropes 10, now, keep auxiliary ropes 10 stretching and slowly counter motion, until auxiliary ropes 10 leaves laser pen hitch, appoint laser hitch naturally to hang vertical.Repeat above-mentioned action can make several times acutely to rock in laser pen hitch fast and stable or do small simple harmonic motion, measure the distance OB now between laser spots B to some O with meter ruler.If laser spots B does small simple harmonic motion, estimate its equilibrium position point (toward the mid point of complex amplitude) and, as B point, measure and average for three times, OB=7640 millimeter.
7., see Fig. 5, laser range finder is placed on position that the 5th step marks and gets range finding ready to pallet fork marked region and obtain distance h2, h2=12263 millimeter.
Above measurement data be brought in formula (2) and calculate, l is high door frame deflection value.
L=(7640-1194)-(12263-1696) × 1194/1992=112.16 millimeter
So the deflection value of these 12.5 meters high three grades of door frames is 112.16 millimeters.
Error analysis: when the uncertainty of OA is ± 1 millimeter, the uncertainty of OB is ± 4 millimeters, and the uncertainty of OC is ± 1 millimeter, when the uncertainty of h2-h1 is ± 2.5 millimeters, the error of door frame deflection metrology result is ± 14.9 millimeters.This error is in allowed band.
Illustrate: the measuring method of secondary gantry is the same.For reach truck, because its gantry angle can not regulate, survey once so unloaded, once, namely twice measurement result is done subtraction is door frame amount of deflection, and measuring method is also the same in fully loaded survey.
Claims (6)
1. for the pick-up unit of forklift door frame deflection metrology, it is characterized in that: comprise laser pen hitch and laser range finder; Described laser pen hitch comprises laser pen (8), bindiny mechanism, cantilever-shaped pole (1) and auxiliary ropes (10); Described laser pen (8) is suspended in the side of pole (1) by bindiny mechanism, laser pen (8) and vertical direction are skewed, and Laser emission mouth is downward; One end of described auxiliary ropes (10) is fixed on deep bead (9), and the other end of auxiliary ropes (10) naturally droops; The upper end of described deep bead (9) is connected to pole (1), and is positioned at the rear of laser pen (8), and auxiliary ropes (10) correspondence is positioned at the dead astern of laser pen (8);
During for detecting, the opposite side of the pole (1) of described laser pen hitch is fixed on the gear shelf of tested forklift door frame, and pole (1) is shaft-like in level, and is parallel to gear shelf front end face; The Laser emission mouth of laser pen (8) faces toward the ground in forklift door frame front; Described laser range finder correspondence is placed on immediately below the pallet fork of laser pen hitch side.
2. the pick-up unit for forklift door frame deflection metrology according to claim 1, is characterized in that: described bindiny mechanism comprises U-shaped fixture block (7), web joint (6), mounting blocks (5), fixed block (4) and cotton thread (2); Described web joint (6) is in vertical, and U-shaped fixture block (7) is fixed on the bottom of web joint (6), and laser pen (8) is installed on U-shaped fixture block (7); Mounting blocks (5) is fixed on the web joint (6) of U-shaped fixture block (7) top; The top cooperation of described mounting blocks (5) is fixed with fixed block (4), described cotton thread (2) is fixed on fixed block (4), the two ends of cotton thread (2) respectively connected pole (1), make bindiny mechanism be hanging like.
3. the pick-up unit for forklift door frame deflection metrology according to claim 1, it is characterized in that: described deep bead (9) is in horizontal U-board shape, bindiny mechanism is positioned at the middle part of deep bead (9), and the emergent light end of laser pen (8) correspond to the opening part of deep bead (9).
4. the pick-up unit for forklift door frame deflection metrology according to claim 1, is characterized in that: the flexible rope that described auxiliary ropes (10) is diameter 0.1 ~ 0.2cm.
5. the pick-up unit for forklift door frame deflection metrology according to claim 2, it is characterized in that: one end of auxiliary ropes (10) point of fixity on deep bead (9) is higher than the end face of the fixed block (4) in bindiny mechanism, and difference in height is more than 10mm.
6. the pick-up unit for forklift door frame deflection metrology according to claim 2, is characterized in that: the cotton thread that described cotton thread (2) is diameter 0.1 ~ 0.2cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520362081.XU CN205037874U (en) | 2015-05-29 | 2015-05-29 | Detection apparatus for be used for fork truck portal amount of deflection to measure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520362081.XU CN205037874U (en) | 2015-05-29 | 2015-05-29 | Detection apparatus for be used for fork truck portal amount of deflection to measure |
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| Publication Number | Publication Date |
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| CN205037874U true CN205037874U (en) | 2016-02-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520362081.XU Active CN205037874U (en) | 2015-05-29 | 2015-05-29 | Detection apparatus for be used for fork truck portal amount of deflection to measure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105091773A (en) * | 2015-05-29 | 2015-11-25 | 安徽合力股份有限公司 | Detection apparatus for forklift mast flexibility measurement |
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2015
- 2015-05-29 CN CN201520362081.XU patent/CN205037874U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105091773A (en) * | 2015-05-29 | 2015-11-25 | 安徽合力股份有限公司 | Detection apparatus for forklift mast flexibility measurement |
| CN105091773B (en) * | 2015-05-29 | 2018-02-09 | 安徽合力股份有限公司 | Detection means for forklift door frame deflection metrology |
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