CN105004458B - Loading shovel forces testing device and method of testing - Google Patents
Loading shovel forces testing device and method of testing Download PDFInfo
- Publication number
- CN105004458B CN105004458B CN201510439006.3A CN201510439006A CN105004458B CN 105004458 B CN105004458 B CN 105004458B CN 201510439006 A CN201510439006 A CN 201510439006A CN 105004458 B CN105004458 B CN 105004458B
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- force sensor
- radial force
- mounting seat
- resistance strain
- scraper bowl
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Abstract
The present invention discloses a kind of loading shovel forces testing device and method of testing, and described device includes right radial force sensor mounting seat, right radial force sensor, right radial force sensor installation sleeve, right lateral force sensors, left lateral force sensors, left radial force sensor installation sleeve, left radial force sensor, left radial force sensor mounting seat, left lateral force sensors mounting seat, right lateral force sensors mounting seat and some resistance strain gages；The present invention is improved by the structure at the hinge to scraper bowl and swing arm, and is provided with right radial force sensor, right lateral force sensors, left lateral force sensors and left radial force sensor for measuring side force F suffered on the bearing pin at O axlesa, bearing pin at O axles is in Ox planes and Oy planes institute stress FxAnd FySome resistance strain gages；It is capable of the stress of direct measurement loading machine operationally its scraper bowl, measurement accuracy is high, and the data obtained can be used for the research and development of loading machine.
Description
【Technical field】
The present invention relates to loading shovel forces testing field, more particularly to a kind of loading shovel forces testing device and
Method of testing.
【Background technology】
Loading machine is one of widely used machine in civil machinery.When loading machine works, load suffered by scraper bowl
Research and development of the characteristic to loading machine are extremely important.Existing method of testing is respectively to choose several positions on swing arm and connecting rod first to carry
Stress value is taken, the relation of stress and external applied load at selected location on component is determined, then passes through in test the stress value of test
The external applied load size that anti-shoveling bucket is subject to.Due to not being direct measurement scraper bowl operationally scraper bowl stress, measurement accuracy can not be protected
Card, and conclusion does not have versatility.
【The content of the invention】
It is an object of the invention to provide a kind of loading shovel forces testing device and method of testing, to solve above-mentioned skill
Art problem.
To achieve these goals, the present invention is adopted the following technical scheme that：
Loading shovel forces testing device, including right radial force sensor mounting seat, right radial force sensor, right radial direction
Force snesor installation sleeve, right lateral force sensors, left lateral force sensors, left radial force sensor installation sleeve, left radial direction
Force snesor, left radial force sensor mounting seat, left lateral force sensors mounting seat, right lateral force sensors mounting seat and some
Resistance strain gage；
The symmetrical configuration of the structure of left radial force sensor mounting seat and right radial force sensor mounting seat；Left radial load is passed
The structure of sensor is identical with the structure of right radial force sensor；The structure of left lateral force sensors mounting seat is sensed with right side force
The symmetrical configuration of device mounting seat；The structure of left lateral force sensors is identical with the structure of right lateral force sensors；Left radial load is passed
Sensor installation sleeve is identical with the structure of right radial force sensor installation sleeve；
Left radial force sensor mounting seat, left radial force sensor, left lateral force sensors mounting seat, left side force sensing
Device, the arrangement of left radial force sensor installation sleeve and right radial force sensor mounting seat, right radial force sensor, right side
Arrangement to force snesor mounting seat, right lateral force sensors, right radial force sensor installation sleeve is symmetrical；
One end of loading machine connecting rod is hinged with rocking arm, and the other end of connecting rod is hinged scraper bowl by a rotating shaft, the rotating shaft
Axial line is C；Swing arm is hinged by right radial force sensor and left radial force sensor with scraper bowl, right radial force sensor and a left side
Radial force sensor is coaxial, and axial line is O；Axial line C is parallel with axial line O；Plane where axial line C and axial line O is
Oy planes, are Ox by axial line O and perpendicular to the plane of Oy planes；
Connecting rod is two power bars, and the stress F for measuring connecting rod is provided with connecting rodCSensor；
It is flat in Ox planes and Oy that right radial force sensor and left radial force sensor are provided with the bearing pin being used to measure at O axles
Face institute stress FxAnd FySome resistance strain gages；
Right lateral force sensors, left lateral force sensors, which are provided with, to be used to measure side force suffered on the bearing pin at O axles
FaSome resistance strain gages.
The right of scraper bowl is set on right radial force sensor mounting seat, swing arm on the right with fixing right in the fraising of scraper bowl
Radial force sensor installation sleeve, the left end closing of right radial force sensor installation sleeve；Right radial force sensor is divided into three
Individual part, is referred to as carrying section, radial load sensing section and hold-down support；The carrying section of right radial force sensor is inserted into right footpath
Into force snesor installation sleeve, the top of the carrying section of right radial force sensor is closed with right radial force sensor installation sleeve
End plate leaves certain gap；The carrying section section of right radial force sensor for it is circular and with right radial force sensor installation sleeve
Inwall be clearance fit relationship, right radial force sensor is fixed on right radial force sensor by hold-down support thereon and installed
On seat.
On the left side of right radial force sensor installation sleeve, right lateral force sensors mounting seat, right lateral force sensors are set
Two parts are divided into, side force sensing section, hold-down support is referred to as；Right lateral force sensors side force senses the top of section
Contacted with the Closed end plate of right radial force sensor installation sleeve, right lateral force sensors are fixed on by hold-down support thereon
In right lateral force sensors mounting seat.
In Oy planes, the radial load sensing section outer surface of right radial force sensor, bonding resistance strain gage R1、R2、R3、
R4, resistance strain gage R1、R4On the cross section C-C of right radial force sensor, resistance strain gage R2、R3Passed positioned at right radial load
On the cross section D-D of sensor, it is arranged at intervals between cross section C-C and cross section D-D；Resistance strain gage R1~R4Constitute for surveying
The y suffered by the right of scraper bowl is measured to power FyrElectric bridge.
In the side force sensing section outer surface of right lateral force sensors, it is bonded with and is born for measuring bearing pin on the right side of scraper bowl
Side force FarResistance strain gage R5、R6。
In Ox planes, the radial load sensing section outer surface of right radial force sensor, bonding resistance strain gage R7、R8、R9、
R10, resistance strain gage R7、R10On the cross section C-C of right radial force sensor, resistance strain gage R8、R9Positioned at right radial load
On the cross section D-D of sensor, resistance strain gage R7~R10Constitute for measuring the x suffered by scraper bowl the right to power FxrElectric bridge.
Loading shovel forces testing method, based on loading shovel forces testing device, including：
By the stress F for being provided for measuring connecting rod on connecting rodCSensor measure connecting rod stress FCThe step of；
Pass through the resistance strain gage R set on right radial force sensor1~R4Suffered by the right of the bridge measurement scraper bowl of composition
Y is to power FyrThe step of；
Pass through the resistance strain gage R set on right radial force sensor7~R10It is suffered on the right of the bridge measurement scraper bowl of composition
X to power FxrThe step of；
Pass through the resistance strain gage R set in right lateral force sensors5、R6What bearing pin was born on the right of measurement scraper bowl is lateral
Power FarThe step of；
Pass through the resistance strain gage R set on left radial force sensor11~R14Suffered by the bridge measurement scraper bowl left side of composition
Y to power FylThe step of；
Pass through the resistance strain gage R set on left radial force sensor17~R20Suffered by the bridge measurement scraper bowl left side of composition
X to power FxlThe step of；
Pass through the resistance strain gage R set in left lateral force sensors15、R16The side that measurement scraper bowl left side bearing pin is born
To power FalThe step of；
Suffered side force F on bearing pin at O axlesa, in Ox planes and Oy planes institute stress FxAnd FyIt is specific as follows：
Fx=Fxl+Fxr
Fy=Fyl+Fyr
Fa=Fal+Far
Relative to prior art, the invention has the advantages that：A kind of loading shovel forces testing dress of the present invention
Put and method of testing, be improved by the structure at the hinge to scraper bowl and swing arm, set right radial force sensor, right side to
Force snesor, left lateral force sensors and left radial force sensor, and on right radial force sensor, right lateral force sensors, a left side
Lateral force sensors and left radial force sensor, which are provided with, to be used to measure side force F suffered on the bearing pin at O axlesa, at O axles
Bearing pin is in Ox planes and Oy planes institute stress FxAnd FySome resistance strain gages；Being capable of direct measurement scraper bowl operationally scraper bowl
Stress, measurement accuracy is high, the firsthand information of load suffered by its scraper bowl when gained test result can be researched and developed as loading machine, to carrying
High loading machine quality is significant.
【Brief description of the drawings】
Fig. 1 is the overall test conceptual scheme of loading shovel forces testing device of the present invention；
Fig. 2 is Fig. 1 A-A sectional views；
Fig. 3 is the enlarged drawing of right radial force sensor；
Fig. 4 is the enlarged drawing of right lateral force sensors；
Fig. 5 is y suffered by the right of scraper bowl to power FyrSensor bridge circuit diagram；
Fig. 6 is Fig. 1 B-B sectional views；
Fig. 7 is x suffered by the right of scraper bowl to power FxrSensor bridge circuit diagram.
In figure：1 it is scraper bowl, 2 is swing arm, 3 is connecting rod, 4 is rocking arm, 5 is bucket cylinder, 6 is right radial force sensor peace
Dress seat, 7 be right radial force sensor, 8 be right radial force sensor installation sleeve, 9 be right lateral force sensors, 10 be left side to
Force snesor, 11 be left radial force sensor installation sleeve, 12 be left radial force sensor, 13 be that left radial force sensor is installed
Seat, 14 be left lateral force sensors mounting seat, 15 be right lateral force sensors mounting seat, R1~R20For resistance strain gage.
【Embodiment】
Refer to shown in Fig. 1 to Fig. 7, a kind of loading shovel forces testing device of the invention, including right radial load sensing
Device mounting seat 6, right radial force sensor 7, right radial force sensor installation sleeve 8, right lateral force sensors 9, left side force are passed
Sensor 10, left radial force sensor installation sleeve 11, left radial force sensor 12, left radial force sensor mounting seat 13, left side
To force snesor mounting seat 14, right lateral force sensors mounting seat 15, resistance strain gage R1~R20。
The symmetrical configuration of the structure of left radial force sensor mounting seat 13 and right radial force sensor mounting seat 6；Left radial direction
The structure of force snesor 12 is identical with the structure of right radial force sensor 7；The structure of left lateral force sensors mounting seat 14 and the right side
The symmetrical configuration of lateral force sensors mounting seat 15；The structure of the structure of left lateral force sensors 10 and right lateral force sensors 9
It is identical；Left radial force sensor installation sleeve 11 is identical with the structure of right radial force sensor installation sleeve 8.
Left radial force sensor mounting seat 13, left radial force sensor 12, left lateral force sensors mounting seat 14, left side to
Force snesor 10, the arrangement of left radial force sensor installation sleeve 11 and right radial force sensor mounting seat 6, right radial load
Sensor 7, right lateral force sensors mounting seat 15, right lateral force sensors 9, the arrangement of right radial force sensor installation sleeve 8
Mode is symmetrical.
Refer to shown in Fig. 1, one end of the connecting rod 3 of loading machine is hinged with Rocker arm 4, the other end of connecting rod 3 is turned by one
Axle is hinged scraper bowl 1, and the axial line of the rotating shaft is C.Swing arm 2 passes through right radial force sensor 7 and left radial force sensor 12 and shovel
Bucket 1 is hinged, and right radial force sensor 7 and left radial force sensor 12 are coaxial, and axial line is O；Axial line C and axial line O is put down
OK.Plane is Oy planes where axial line C and axial line O, is Ox by axial line O and perpendicular to the plane of Oy planes.
It will be seen from figure 1 that during loading machine work, active force and scraper bowl 1 and swing arm 2 of the material loaded to scraper bowl 1
Hinge directed force FO, connecting rod 3 directed force FCMake a concerted effort F balance each other, the directed force F of the hinge of scraper bowl 1 and swing arm 2OCan be with
It is decomposed into FxAnd Fy.Because connecting rod 3 is two power bars, sensor is set to measure the stress F of connecting rod 3 on connecting rod 3C；At O axles
On hinge pin, sensor is set to measure FxAnd Fy；, can using the relation shown in Fig. 1 under the conditions of known to loading machine operating attitude
To calculate total stress F of the scraper bowl 1 in x/y plane.
On the hinge pin at O axles, sensor is set to measure the side force F that bearing pin is borna, can by relevant mechanics principle
Know, FaSuffered side force when being worked equal to scraper bowl.
Fx、Fy、FaMeasuring method it is as follows：
As shown in Fig. 2 being undergone technological transformation to scraper bowl 1 with the structure at the hinge of swing arm 2, set on the right of scraper bowl 1
With fixing right radial force sensor installation set in the fraising of scraper bowl 1 on right radial force sensor mounting seat 6, swing arm 2 on the right
Cylinder 8, the left end closing of right radial force sensor installation sleeve 8；Right radial force sensor 7 is divided into three parts (see Fig. 3), point
Also known as sense section and hold-down support for carrying section, radial load；During installation, the carrying section of right radial force sensor 7 is inserted into right footpath
Into force snesor installation sleeve 8, the top of the carrying section of right radial force sensor 7 and right radial force sensor installation sleeve 8
Closed end plate leaves certain gap, to ensure that right radial force sensor 7 is not subject to side force, and right radial force sensor 7 is held
It is that circular and with right radial force sensor installation sleeve 8 inwall is clearance fit relationship to carry section section, right radial force sensor 7
It is fixed on by hold-down support thereon in right radial force sensor mounting seat 6.
Right lateral force sensors mounting seat 15 is set on the left side of right radial force sensor installation sleeve 8, and right side force is passed
Sensor 9 is divided into two parts (see Fig. 4), is referred to as side force sensing section, hold-down support；During installation, right side force sensing
The top of the side force of device 9 sensing section is contacted with the Closed end plate of right radial force sensor installation sleeve 8, right lateral force sensors 9
It is fixed on by hold-down support thereon in right lateral force sensors mounting seat 15.
As shown in Fig. 2 in Oy planes, the radial load sensing section outer surface of right radial force sensor 7 is bonded resistance-strain
Piece R1、R2、R3、R4, resistance strain gage R1、R4On the cross section C-C of right radial force sensor 7, resistance strain gage R2、R3Position
In on the cross section D-D of right radial force sensor 7, it is arranged at intervals between cross section C-C and cross section D-D, spacing is l (Fig. 3),
l>0, l concrete numerical value is by structure determination, and larger l is readily available stronger induced signal, but can reduce radial load biography simultaneously
The safety coefficient of sensor, resistance strain gage R1~R4Group bridge mode such as Fig. 5, the output signal of electric bridge shown in Fig. 5 is proportional to scraper bowl
Y suffered by the right is to power Fyr。
In the side force sensing section outer surface of right lateral force sensors 9, bonding resistance strain gage R5、R6, utilize resistance-strain
Piece R5、R6, the side force F that the right bearing pin is born can be measuredar。
As shown in fig. 6, in Ox planes, the radial load sensing section outer surface of right radial force sensor 7 is bonded resistance-strain
Piece R7、R8、R9、R10, resistance strain gage R7、R10On the cross section C-C of right radial force sensor 7, resistance strain gage R8、R9
On the cross section D-D of right radial force sensor 7, resistance strain gage R7~R10Group bridge mode such as Fig. 7, Fig. 7 electric bridges it is defeated
Go out signal be proportional on the right of scraper bowl suffered by x to power Fxr。
Y suffered by the scraper bowl left side is measured to power FylPrinciple with the right of measurement scraper bowl suffered by y to power FyrPrinciple phase
Together；X suffered by the scraper bowl left side is measured to power FxlPrinciple with the right of measurement scraper bowl suffered by x to power FxrPrinciple it is identical.By with
Lower two formulas calculate Fx、Fy。
Fx=Fxl+Fxr
Fy=Fyl+Fyr
The side force F that measurement scraper bowl left side bearing pin is bornalPrinciple with measurement scraper bowl on the right of bearing pin born it is lateral
Power FalPrinciple it is identical.By Fal、FarThe side force F suffered by scraper bowl can be obtained after synthesisa。
Claims (2)
1. loading shovel forces testing device, it is characterised in that including right radial force sensor mounting seat (6), right radial load
Sensor (7), right radial force sensor installation sleeve (8), right lateral force sensors (9), left lateral force sensors (10), Zuo Jing
Passed to force snesor installation sleeve (11), left radial force sensor (12), left radial force sensor mounting seat (13), left side force
Sensor mounting seat (14), right lateral force sensors mounting seat (15) and some resistance strain gages；
The structure of left radial force sensor mounting seat (13) and the symmetrical configuration of right radial force sensor mounting seat (6)；Left radial direction
The structure of force snesor (12) is identical with the structure of right radial force sensor (7)；The knot of left lateral force sensors mounting seat (14)
Structure and the symmetrical configuration of right lateral force sensors mounting seat (15)；The structure of left lateral force sensors (10) is sensed with right side force
The structure of device (9) is identical；The structure phase of left radial force sensor installation sleeve (11) and right radial force sensor installation sleeve (8)
Together；
Left radial force sensor mounting seat (13), left radial force sensor (12), left lateral force sensors mounting seat (14), left side
To force snesor (10), the arrangement of left radial force sensor installation sleeve (11) and right radial force sensor mounting seat (6),
Right radial force sensor (7), right lateral force sensors mounting seat (15), right lateral force sensors (9), right radial force sensor peace
The arrangement of sleeved (8) is symmetrical；
One end of loading machine connecting rod (3) is hinged with rocking arm (4), and the other end of connecting rod (3) is hinged scraper bowl (1) by a rotating shaft,
The axial line of the rotating shaft is C；Swing arm (2) is cut with scissors by right radial force sensor (7) and left radial force sensor (12) with scraper bowl (1)
Connect, right radial force sensor (7) and left radial force sensor (12) coaxially, and axial line be O；Axial line C and axial line O is put down
OK；Plane is Oy planes where axial line C and axial line O, is Ox by axial line O and perpendicular to the plane of Oy planes；
Connecting rod (3) is two power bars, and the stress F for measuring connecting rod (3) is provided with connecting rod (3)CSensor；
Right radial force sensor (7) and left radial force sensor (12) be provided with the bearing pin that is used to measure at O axles in Ox planes and
Oy planes institute stress FxAnd FySome resistance strain gages；These resistance strain gages are entirely located in the side of loading arm, in dress
Between carrier aircraft swing arm and radial force sensor mounting seat, the diameter parallel of direction and radial force sensor is pasted；
Right lateral force sensors (9), left lateral force sensors (10), which are provided with, to be used to measure lateral suffered by the bearing pin at O axles
Power FaSome resistance strain gages；
The right of scraper bowl (1) sets the fraising with scraper bowl (1) on right radial force sensor mounting seat (6), swing arm (2) on the right
The interior right radial force sensor installation sleeve (8) of fixation, the left end closing of right radial force sensor installation sleeve (8)；Right radial load
Sensor (7) is divided into three parts, is referred to as carrying section, radial load sensing section and hold-down support；Right radial force sensor
(7) carrying section is inserted into right radial force sensor installation sleeve (8), the top of the carrying section of right radial force sensor (7)
Certain gap is left with right radial force sensor installation sleeve (8) Closed end plate；The carrying section of right radial force sensor (7) is disconnected
Face is that circular and with right radial force sensor installation sleeve (8) inwall is clearance fit relationship, and right radial force sensor (7) is led to
The hold-down support crossed thereon is fixed on right radial force sensor mounting seat (6)；
Right lateral force sensors mounting seat (15) is set on the left side of right radial force sensor installation sleeve (8), and right side force is passed
Sensor (9) is divided into two parts, is referred to as side force sensing section, hold-down support；Right lateral force sensors (9) side force sense
The top of section is answered to be contacted with the Closed end plate of right radial force sensor installation sleeve (8), right lateral force sensors (9) are by thereon
Hold-down support be fixed on right lateral force sensors mounting seat (15)；
In Oy planes, the radial load sensing section outer surface of right radial force sensor (7), bonding resistance strain gage R1、R2、R3、R4,
Resistance strain gage R1、R4On the cross section C-C of right radial force sensor (7), resistance strain gage R2、R3Positioned at right radial load
On the cross section D-D of sensor (7), it is arranged at intervals between cross section C-C and cross section D-D；Resistance strain gage R1~R4Composition is used
Y suffered by the right of the measurement scraper bowl is to power FyrElectric bridge；
In the side force sensing section outer surface of right lateral force sensors (9), it is bonded with and is born for measuring bearing pin on the right side of scraper bowl
Side force FarResistance strain gage R5、R6；
In Ox planes, the radial load sensing section outer surface of right radial force sensor (7), bonding resistance strain gage R7、R8、R9、
R10, resistance strain gage R7、R10On the cross section C-C of right radial force sensor (7), resistance strain gage R8、R9Positioned at right footpath
To on the cross section D-D of force snesor (7), resistance strain gage R7~R10Constitute for measuring the x suffered by scraper bowl the right to power Fxr
Electric bridge.
2. loading shovel forces testing method, it is characterised in that based on the loading shovel forces testing described in claim 1
Device, including：
By the stress F for being provided for measuring connecting rod (3) on connecting rod (3)CSensor measurement connecting rod (3) stress FCThe step of；
Pass through the resistance strain gage R set on right radial force sensor (7)1~R4Y suffered by the right of the bridge measurement scraper bowl of composition
To power FyrThe step of；
Pass through the resistance strain gage R set on right radial force sensor (7)7~R10Suffered by the right of the bridge measurement scraper bowl of composition
X is to power FxrThe step of；
Pass through the resistance strain gage R set in right lateral force sensors (9)5、R6The side force that bearing pin is born on the right of measurement scraper bowl
FarThe step of；
Pass through the resistance strain gage R set on left radial force sensor (12)11~R14Suffered by the bridge measurement scraper bowl left side of composition
Y to power FylThe step of；
Pass through the resistance strain gage R set on left radial force sensor (12)17~R20Suffered by the bridge measurement scraper bowl left side of composition
X to power FxlThe step of；
Pass through the resistance strain gage R set in left lateral force sensors (10)15、R16It is lateral that measurement scraper bowl left side bearing pin is born
Power FalThe step of；
Suffered side force F on bearing pin at O axlesa, in Ox planes and Oy planes institute stress FxAnd FyIt is specific as follows：
Fx=Fxl+Fxr
Fy=Fyl+Fyr
Fa=Fal+Far。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510439006.3A CN105004458B (en) | 2015-07-23 | 2015-07-23 | Loading shovel forces testing device and method of testing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510439006.3A CN105004458B (en) | 2015-07-23 | 2015-07-23 | Loading shovel forces testing device and method of testing |
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| CN105004458A CN105004458A (en) | 2015-10-28 |
| CN105004458B true CN105004458B (en) | 2017-08-15 |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105369846B (en) * | 2015-12-06 | 2018-04-10 | 吉林大学 | A kind of working device of loader load test system |
| CN105588669B (en) * | 2015-12-11 | 2021-03-16 | 广西柳工机械股份有限公司 | Axle pin type three-way force cell sensor |
| CN105841871A (en) * | 2016-03-21 | 2016-08-10 | 长安大学 | Loader bucket lateral force testing device and testing method |
| CN105973510B (en) * | 2016-07-13 | 2018-09-18 | 长安大学 | Loading shovel forces testing method |
| CN107356445B (en) * | 2017-06-22 | 2019-05-07 | 长安大学 | Method for sorting, loading method and device are composed in working device of loader fatigue test |
| CN107356446B (en) * | 2017-07-07 | 2020-06-12 | 徐工集团工程机械有限公司 | Loading spectrum testing system for loader working device, working device and loader |
| CN110285907B (en) * | 2019-07-10 | 2021-01-29 | 吉林大学 | Loader bucket stress testing method based on Kalman filtering algorithm |
| CN113418646A (en) * | 2021-07-09 | 2021-09-21 | 东北农业大学 | Pin shaft type radial force sensor |
| CN113405702A (en) * | 2021-07-09 | 2021-09-17 | 东北农业大学 | Sensing device for measuring operation resistance of suspended agricultural implement |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2846848B2 (en) * | 1996-02-07 | 1999-01-13 | 株式会社小松製作所 | Earthwork detection device |
| CN2450647Y (en) * | 2000-11-09 | 2001-09-26 | 张家港保税区中诚国际工贸有限公司 | Dynamic shaft pin type force cell |
| CN2729666Y (en) * | 2004-03-25 | 2005-09-28 | 石家庄开发区益通科技有限公司 | Mechanical weighing mechanism of load machine dynamic electronic balance |
| CN100456001C (en) * | 2004-09-15 | 2009-01-28 | 南宁铁路局科学技术研究所 | Electronic weighing system for loading machine and method for metering loading capacity |
| CN103063341B (en) * | 2012-12-19 | 2016-01-20 | 三一重工股份有限公司 | A kind of detect pivot pin bear the method for radial force |
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