CN105806179A - Method and device for measuring length of automobile transmission shaft under constant pressure - Google Patents
Method and device for measuring length of automobile transmission shaft under constant pressure Download PDFInfo
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- CN105806179A CN105806179A CN201610168805.6A CN201610168805A CN105806179A CN 105806179 A CN105806179 A CN 105806179A CN 201610168805 A CN201610168805 A CN 201610168805A CN 105806179 A CN105806179 A CN 105806179A
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- drive shaft
- truck drive
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/02—Measuring arrangements characterised by the use of mechanical techniques for measuring length, width or thickness
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- Length Measuring Devices With Unspecified Measuring Means (AREA)
- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
The invention discloses a method and device for measuring the length of an automobile transmission shaft under constant pressure.The method comprises the steps that the two ends of the automobile transmission shaft to be measured are gently grabbed for centering at first to ensure that an axle tube of the automobile transmission shaft to be measured and the axis of a telescopic sleeve are located on the same straight line, an alternating current servo motor is operated in a torque mode, two limiting baffles on a fixed block and a movable block are driven to compress the two end faces of the automobile transmission shaft to be measured, a magnetic railing ruler is utilized for measuring the distance between two reference faces making contact with the two end faces of the automobile transmission shaft to be measured, the length of the automobile transmission shaft to be measured under the set force value is obtained, and therefore whether the length of the automobile transmission shaft to be measured is qualified or not is judged.The device is simple and compact in mechanism, low in production cost, small in occupied area and accurate in measuring result.
Description
Technical field
The present invention relates to mechanical detection equipment technical field, more specifically, particularly relate to the length measurement method under a kind of truck drive shaft constant pressure and device thereof.
Background technology
Truck drive shaft be universal driving device power transmission shaft in can transmit the axle of power, it is the rotary body of a high rotating speed, few supporting, truck drive shaft is the most important parts transmitting power in car transmissions, the power of electromotor is passed to wheel by it together with change speed gear box, drive axle, makes automobile produce driving force.
Truck drive shaft is usually made up of central siphon, telescopic and universal joint, and telescopic is arranged on the two ends of central siphon, and two telescopics connect the two ends of central siphon respectively through two universal joints.Telescopic can be automatically adjusted the distance change between variator and drive axle, and universal joint is for ensureing that transmission output shaft and drive axle power shaft connect the change of axis angle, and realizes the constant velocity tramsmission of two axles；Central siphon has one and is connected axle bowl with the junction of universal joint, is provided with a back-up ring in axle bowl, and universal joint is blocked by back-up ring, makes universal joint and central siphon link together.
Truck drive shaft is before use, whether it qualified must be detected, the very important detection project of one of which is exactly the length detecting truck drive shaft under a certain pressure, and the required precision of this length is very high, and can be directly connected to truck drive shaft normally use.Owing to the two ends of truck drive shaft are provided with universal joint, generally cannot ensure that the axle center of the central siphon of truck drive shaft and two telescopics is on same straight line, therefore how to feel relieved, namely ensure that the pipe of truck drive shaft and the axle center of telescopic are the design difficulties of the present invention on same straight line, it does not have the length value recorded when centering is inaccurate.Simultaneously when centering, measure truck drive shaft in length process and can not be subject to excessive instantaneous pressure.In the process that truck drive shaft is carried out linear measure longimetry, typically require and under the effect of constant pressure, truck drive shaft is measured, and when applying this power, the excessive meeting of instantaneous force value directly produces bending at universal joint place, the axle center causing central siphon and telescopic offsets, thus affecting centering effect, causing that measurement result is inaccurate, therefore how to ensure that the force value when measuring also is a difficult point of the present invention not over preset value.
Summary of the invention
Present invention aims to above-mentioned the deficiencies in the prior art, length measurement method under a kind of truck drive shaft constant pressure and device thereof are provided, the method can with the force compresses truck drive shaft of setting, and measure the length of truck drive shaft under this constant force effect, measurement result is accurate, measures efficiency high.
The technical scheme is that and be achieved in that: length-measuring appliance under a kind of truck drive shaft constant pressure, including base, slide rail, fixing plate, portable plate, wind, postive stop baffle, cylinder clamping device, motor driver, tension measuring device and a support arrangement, described slide rail is fixed on base, described slide rail is provided with fixing plate and portable plate, the all fixing sliding shoe matched with described slide rail bottom described fixing plate and portable plate, described fixing plate connects tension measuring device away from the side of described portable plate；Described tension measuring device includes force transducer and the fixing seat of sensor, and the fixing seat of sensor is fixed on base, and one end of force transducer connects the fixing seat of sensor, and the other end connects fixing plate；The cylinder clamping device for clamping truck drive shaft two ends to be measured it is respectively and fixedly provided with above described fixing plate and portable plate, cylinder clamping device includes driving cylinder and fixture, fixture, for clamping the two ends of truck drive shaft to be measured, drives cylinder for driving the clamping of described fixture and unclamping；Described fixture includes fixed chuck and active chuck, and active chuck is fixed on the corresponding piston rod end driving cylinder, drives cylinder to drive active chuck to move to fixed chuck direction, it is achieved the centering of truck drive shaft to be measured or clamping；Described motor driver includes AC servo motor, shaft coupling, ball-screw and fixing slide block, described fixing slide block is fixed on the bottom of portable plate, fixing slide block is provided with the screwed hole matched with described ball-screw, one end of described ball-screw connects AC servo motor, screwed hole on the fixing slide block of other end traverse, described AC servo motor is fixed on described slide rail by motor mounting plate, drives described portable plate to slide along described slide rail during the motion of described AC servo motor；The top of described fixing plate and portable plate further respectively has and is perpendicular to the postive stop baffle that slide rail direction is arranged, and two postive stop baffles are respectively provided at the outside of two fixtures, and two postive stop baffles are for carrying out spacing to the two ends of truck drive shaft to be measured；Described support arrangement includes gripper shoe, two spring bearings and two bearing sliders, the T-shaped chute being perpendicular to slide rail direction is had above described gripper shoe, two spring bearings are separately fixed on two bearing sliders, two bearing sliders are arranged in described T-shaped chute and can along described T-shaped chute rectilinear motions, being equipped with hole, location on two bearing sliders, two bearing sliders are fixed in described gripper shoe by the bolt matched with hole, described location；Base below described slide rail is additionally provided with for magnetic railings ruler；Described wind connects described portable plate and for adjusting the initial position of described portable plate.
Length measurement method under a kind of truck drive shaft constant pressure, the method adopts the length-measuring appliance under a kind of truck drive shaft constant pressure, and the method comprises the steps:
(1) wind is used to regulate portable plate to suitable position, put into standard component, standard component is the stiff shaft identical with the central siphon diameter of truck drive shaft to be measured, the two ends of standard component are respectively put in the fixture of two cylinder clamping device front ends, air inlet in two air inlets driving cylinder, two two ends driving air cylinder driven clamp standard component；Bearing slider below mobile spring bearing, regulate the position of spring bearing, make two pairs of spring bearings against standard component locking positioning bolt, complete the location of spring bearing, now stop driving the supply of cylinder, fixture restPoses, and takes standard component away, completes the spring bearing location work before detection；
(2) truck drive shaft to be measured is put into, air inlet in two air inlets driving cylinder, two two ends driving two clamp truck drive shafts to be measured of air cylinder driven, AC servo motor is run again with torque mode, AC servo motor drives portable plate to deviate from fixing plate direction along slide rail direction and moves, and truck drive shaft to be measured stretches gradually；
(3) stop motion after AC servo motor operation 2-3s, now truck drive shaft to be measured is in elongated condition, and the axle center of its central siphon and telescopic is on same straight line；Switching two blowing models driving cylinders, drive the air inlets of cylinders and venthole to supply to two simultaneously, two drive cylinder to provide to provide less centering power to fixture, and two fixtures clamp the two ends of truck drive shaft to be measured gently；
(4) antiport AC servo motor, AC servo motor still runs with torque mode, AC servo motor drives portable plate to move along slide rail direction to fixing plate direction, in this process, portable plate and two postive stop baffles above fixing plate contact with truck drive shaft both ends of the surface to be measured and compress truck drive shaft to be measured gradually, utilize force sensor measuring truck drive shaft pressure experienced to be measured in this process, and by force transducer, AC servo motor is carried out closed loop control, when the power that force transducer detects reaches preset value, AC servo motor keeps this moment to move, ensure that the force value that force transducer detects is certain value；
(5) reading of magnetic railings ruler is read, the data that magnetic railings ruler reads are the distance value of AC servo motor motion, this distance value is in the scope of fluctuation, in the process that force transducer retentivity is constant, the excursion detected when magnetic railings ruler is in the scope of ± 0.01mm and after stablizing more than 3s, read the reading of magnetic railings ruler, and using this reading length as truck drive shaft to be measured；
(6) antiport AC servo motor 2-3s after magnetic railings ruler measurement, stops two supply driving cylinders, and now fixture unclamps, and manually or automatically mode takes off truck drive shaft to be measured, completes the detection of single truck drive shaft to be measured；
(7) detection of next truck drive shaft to be measured is carried out, it is only necessary to repeat step 2-6.
Further, the internal diameter of cylinder of described driving cylinder is 100mm, diameter of piston rod is 30mm, cylinder is driven to be provided with centering and two mode of operations of clamping, clamping pattern is the normal mode of operation of cylinder, now driving the air inlet air inlet of cylinder, venthole is given vent to anger, and drives the clamping force that cylinder provides to be sized to 3150-3800N；Under centering pattern, the air inlet while of air inlet and venthole, the pressure of the two air inlet is identical, and the lifting surface area that band is piston is different, now drives the centering power that cylinder provides
F=P × SPiston-P×(SPiston-SPiston rod)=P × SPiston rod
Wherein P is pressure, SPistonFor piston cross-section area, SPiston rodFor piston rod cross-sectional area, the centering power that F provides for cylinder, centering power is sized to 100-120N, and centering power is only for stretching truck drive shaft, the telescopic of guarantee truck drive shaft and the axle center of central siphon are on same straight line, but do not affect truck drive shaft and horizontally slip in fixture.
Further, the position of described holder is the splined section of truck drive shaft to be measured, the rigidity of fixture and truck drive shaft contact portion to be measured is less than the rigidity of truck drive shaft splined section to be measured, and namely the rigidity of fixed chuck and active chuck and truck drive shaft contact portion to be measured is less than the rigidity of truck drive shaft splined section to be measured.
Further, the V-shaped design of contact surface of described active chuck and truck drive shaft.
Further, when the specifications and models of truck drive shaft to be measured change, it is only necessary to the standard component taking same specification repeats step 1, and recycle step 2-6 carries out the truck drive shaft length detection to be measured of this specification.
The beneficial effects of the present invention is:
1, present configuration is simply compact, and production cost is low, and it is little to take up room, it is possible to realize the linear measure longimetry of truck drive shaft, and certainty of measurement is high, will not be subject to the impact of automobile driving shaft bending.
2, the present invention is in the linear measure longimetry process of truck drive shaft, first truck drive shaft to be measured is elongated, ensure the axle center of the central siphon of truck drive shaft to be measured and telescopic on the same line, impose the power consistent with axis direction again, this process is forced stretched by the truck drive shaft to be measured being likely to bending, the accuracy of measurement result, on same straight line, is improved in the central siphon of guarantee truck drive shaft and the axle center of telescopic.
3, the present invention utilizes driving cylinder to realize the centering to truck drive shaft and clamping simultaneously, the two gap edge needed is very big, and same driving cylinder generally cannot realize loading two power varied in size under normal circumstances, the present invention utilizes and drives the venthole of cylinder to carry out air inlet and giving vent to anger respectively to realize changing the force value that same driving cylinder exports, save equipment occupation space, reduce the cost of equipment.
4, the two ends driving cylinder to clamp truck drive shaft with less power are first adopted when the present invention operates, realize the centering of truck drive shaft, two postive stop baffle compression truck drive shafts are driven with torque mode again through AC servo motor, when reaching the force value set, AC servo motor keeps this torque rotation, the length of truck drive shaft is measured after force value a period of time that force transducer keeps constant, improve the accuracy of measurement result, avoid in measurement process because truck drive shaft to be measured press-bending is caused the inaccurate problem of measurement result by bigger power simultaneously.
5, the whole measurement apparatus of the present invention is arranged on slide rail, by the fixing distance between plate and portable plate of wind manual adjustments, it is possible to meet the detection of different size truck drive shaft.
6, the middle part of truck drive shaft is supported by the present invention by a support arrangement, adopt and first clamp two ends again to the method being supported in the middle part of power transmission shaft, when the truck drive shaft of same batch of different size is detected, when only a support arrangement need to be adjusted when detecting first truck drive shaft, the detection of the truck drive shaft of this batch of same specification, facilitates detection process.
7, the present invention adopts magnetic railings ruler to carry out measurement of length and can effectively prevent the external interference impact on measurement effect, improves the accuracy of measurement.
8, in the process of the actual measurement of truck drive shaft, the datum level of measurement generally cannot be determined in the two ends of truck drive shaft；And the present invention by the two ends of truck drive shaft against two pieces of postive stop baffles, the face of postive stop baffle and two end contacts of truck drive shaft is set as two datum levels, magnetic railings ruler is actual, and what measure is the distance of two datum levels, and it is convenient to measure, and greatly improves the accuracy of measurement.
Accompanying drawing explanation
Below in conjunction with the embodiment in accompanying drawing, the present invention is described in further detail, but is not intended that any limitation of the invention.
Fig. 1 is the structural representation of present invention truck drive shaft to be measured.
Fig. 2 is the structural representation of the length-measuring appliance under a kind of truck drive shaft constant pressure of the present invention.
In figure, 1-base, 2-slide rail, 3-fix plate, 4-portable plate, 5-postive stop baffle, 6-sliding shoe, 7-driving cylinder, 8-fixed chuck, 9-active chuck, 10-AC servo motor, 11-truck drive shaft to be measured, the fixing slide block of 12-, 13-force transducer, 14-sensor fixing seat, 15-motor mounting plate, 16-gripper shoe, 17-spring bearing, 18-bearing slider, 19-air inlet, 20-venthole.
Detailed description of the invention
Consult shown in Fig. 1 and Fig. 2, a kind of length-measuring appliance under the truck drive shaft constant pressure of the present invention, including base 1, slide rail 2, fixing plate 3, portable plate 4, wind, postive stop baffle 5, cylinder clamping device, motor driver, tension measuring device and a support arrangement, described slide rail 2 is fixed on base 1, described slide rail 2 is provided with fixing plate 3 and portable plate 4, the all fixing sliding shoe 6 matched with described slide rail 2 bottom described fixing plate 3 and portable plate 4, described fixing plate 3 connects tension measuring device away from the side of described portable plate 4；Described tension measuring device includes force transducer 13 and the fixing seat 14 of sensor, and the fixing seat 14 of sensor is fixed on base 1, and one end of force transducer 13 connects the fixing seat 14 of sensor, and the other end connects fixing plate 3；The cylinder clamping device for clamping truck drive shaft 11 two ends to be measured it is respectively and fixedly provided with above described fixing plate 3 and portable plate 4, cylinder clamping device includes driving cylinder 7 and fixture, fixture, for clamping the two ends of truck drive shaft 11 to be measured, drives cylinder 7 for driving the clamping of described fixture and unclamping；Described fixture includes fixed chuck 8 and active chuck 9, and active chuck 9 is fixed on the corresponding piston rod end driving cylinder 7, drives cylinder 7 to drive active chuck 9 to move to fixed chuck 8 direction, it is achieved the centering of truck drive shaft 11 to be measured or clamping；Described motor driver includes AC servo motor 10, shaft coupling, ball-screw and fixing slide block 12, described fixing slide block 12 is fixed on the bottom of portable plate 4, fixing slide block 12 is provided with the screwed hole matched with described ball-screw, one end of described ball-screw connects AC servo motor 10, screwed hole on the fixing slide block 12 of other end traverse, described AC servo motor 10 is fixed on described slide rail by motor mounting plate 15, and described AC servo motor 10 drives described portable plate 4 to slide along described slide rail 2 when moving；The top of described fixing plate 3 and portable plate 4 further respectively has and is perpendicular to the postive stop baffle 5 that slide rail direction is arranged, and two postive stop baffles 5 are respectively provided at the outside of two fixtures, and two postive stop baffles 5 are for carrying out spacing to the two ends of truck drive shaft 11 to be measured；Described support arrangement includes 16, two spring bearings 17 of gripper shoe and two bearing sliders 18, the T-shaped chute being perpendicular to slide rail direction is had above described gripper shoe 16, two spring bearings 17 are separately fixed on two bearing sliders 18, two bearing sliders 18 are arranged in described T-shaped chute and can along described T-shaped chute rectilinear motions, being equipped with hole, location on two bearing sliders 18, two bearing sliders 18 are fixed in described gripper shoe 16 by the bolt matched with hole, described location；Base 1 below described slide rail is additionally provided with for magnetic railings ruler；Described wind connects described portable plate 4 and for adjusting the initial position of described portable plate 4.
Length measurement method under a kind of truck drive shaft constant pressure, the method adopts the length-measuring appliance under a kind of truck drive shaft constant pressure, and the method comprises the steps:
(1) wind is used to regulate portable plate 4 to suitable position, put into standard component, standard component is the stiff shaft identical with the central siphon diameter of truck drive shaft 11 to be measured, the two ends of standard component are respectively put in the fixture of two cylinder clamping device front ends, air inlet in two air inlets 19 driving cylinder 7, two drive the two ends that cylinder 7 drives fixture to clamping standard component；Bearing slider 18 below mobile spring bearing 17, regulate the position of spring bearing 17, make two pairs of spring bearings 17 against standard component locking positioning bolt, complete the location of spring bearing 17, now stop driving the supply of cylinder 7, fixture restPoses, and takes standard component away, completes the spring bearing 17 before detection and positions work；
(2) truck drive shaft 11 to be measured is put into, air inlet in two air inlets 19 driving cylinder 7, two drive the two ends that cylinder 7 drives two clamp truck drive shafts 11 to be measured, AC servo motor 10 is run again with torque mode, AC servo motor 10 drives portable plate 4 to deviate from fixing plate 3 direction along slide rail 2 direction and moves, and truck drive shaft 11 to be measured stretches gradually；
(3) AC servo motor 10 runs stop motion after 2-3s, and now truck drive shaft 11 to be measured is in elongated condition, and the axle center of its central siphon and telescopic is on same straight line；Switching two blowing models driving cylinders 7, drive the air inlets 19 of cylinders 7 and venthole 20 to supply to two simultaneously, two drive cylinder 7 to provide to provide less centering power to fixture, and two fixtures clamp the two ends of truck drive shaft 11 to be measured gently；
(4) antiport AC servo motor 10, AC servo motor 10 still runs with torque mode, AC servo motor 10 drives portable plate 4 to move along slide rail 2 direction to fixing plate 3 direction, in this process, portable plate 4 contacts and compresses gradually truck drive shaft 11 to be measured with two postive stop baffles 5 above fixing plate 3 with truck drive shaft 11 both ends of the surface to be measured, force transducer 13 is utilized to measure truck drive shaft 11 pressure experienced to be measured in this process, and by force transducer 13, AC servo motor 10 is carried out closed loop control, when the power that force transducer 13 detects reaches preset value, AC servo motor 10 keeps this moment to move, ensure that the force value that force transducer 13 detects is certain value；
(5) reading of magnetic railings ruler is read, the data that magnetic railings ruler reads are the distance value of AC servo motor 10 motion, this distance value is in the scope of fluctuation, in the process that force transducer 13 retentivity is constant, the excursion detected when magnetic railings ruler is in the scope of ± 0.01mm and after stablizing more than 3s, read the reading of magnetic railings ruler, and using this reading length as truck drive shaft 11 to be measured；
(6) antiport AC servo motor 102-3s after magnetic railings ruler measurement, stop two supply driving cylinder 7, now fixture unclamps, and manually or automatically mode takes off truck drive shaft 11 to be measured, completes the detection of single truck drive shaft to be measured 11；
(7) detection of next truck drive shaft to be measured 11 is carried out, it is only necessary to repeat step 2-6.
The internal diameter of cylinder of described driving cylinder 7 is 100mm, diameter of piston rod is 30mm, cylinder 7 is driven to be provided with centering and two mode of operations of clamping, clamping pattern is the normal mode of operation of cylinder, now drive air inlet 19 air inlet of cylinder 7, venthole 20 is given vent to anger, and drives the clamping force that cylinder 7 provides to be sized to 3150-3800N；Under centering pattern, the air inlet while of air inlet 19 and venthole 20, the pressure of the two air inlet is identical, and the lifting surface area that band is piston is different, now drives the centering power that cylinder 7 provides
F=P × SPiston-P×(SPiston-SPiston rod)=P × SPiston rod
Wherein P is pressure, SPistonFor piston cross-section area, SPiston rodFor piston rod cross-sectional area, the centering power that F provides for cylinder, centering power is sized to 100-120N, and centering power is only for stretching truck drive shaft, the telescopic of guarantee truck drive shaft and the axle center of central siphon are on same straight line, but do not affect truck drive shaft and horizontally slip in fixture.
The position of described holder is the splined section of truck drive shaft 11 to be measured, the rigidity of fixture and truck drive shaft 11 contact portion to be measured is less than the rigidity of truck drive shaft 11 splined section to be measured, and namely the rigidity of fixed chuck 8 and active chuck 9 and truck drive shaft 11 contact portion to be measured is less than the rigidity of truck drive shaft 11 splined section to be measured.
The V-shaped design of contact surface of described active chuck 9 and truck drive shaft.
When the specifications and models of truck drive shaft 11 to be measured change, it is only necessary to the standard component taking same specification repeats step 1, and recycle step 2-6 carries out truck drive shaft to be measured 11 length detection of this specification.
Embodiment provided above is the better embodiment of the present invention, only it is used for the present invention is conveniently described, not the present invention is done any pro forma restriction, any art has usually intellectual, if in the scope without departing from the carried technical characteristic of the present invention, utilize the Equivalent embodiments that the done local of disclosed technology contents is changed or modified, and without departing from the technical characteristic content of the present invention, all still fall within the scope of the technology of the present invention feature.
Claims (6)
1. the length-measuring appliance under a truck drive shaft constant pressure, it is characterized in that: include base, slide rail, fixing plate, portable plate, wind, postive stop baffle, cylinder clamping device, motor driver, tension measuring device and a support arrangement, described slide rail is fixed on base, described slide rail is provided with fixing plate and portable plate, the all fixing sliding shoe matched with described slide rail bottom described fixing plate and portable plate, described fixing plate connects tension measuring device away from the side of described portable plate；Described tension measuring device includes force transducer and the fixing seat of sensor, and the fixing seat of sensor is fixed on base, and one end of force transducer connects the fixing seat of sensor, and the other end connects fixing plate；The cylinder clamping device for clamping truck drive shaft two ends to be measured it is respectively and fixedly provided with above described fixing plate and portable plate, cylinder clamping device includes driving cylinder and fixture, fixture, for clamping the two ends of truck drive shaft to be measured, drives cylinder for driving the clamping of described fixture and unclamping；Described fixture includes fixed chuck and active chuck, and active chuck is fixed on the corresponding piston rod end driving cylinder, drives cylinder to drive active chuck to move to fixed chuck direction, it is achieved the centering of truck drive shaft to be measured or clamping；Described motor driver includes AC servo motor, shaft coupling, ball-screw and fixing slide block, described fixing slide block is fixed on the bottom of portable plate, fixing slide block is provided with the screwed hole matched with described ball-screw, one end of described ball-screw connects AC servo motor, screwed hole on the fixing slide block of other end traverse, described AC servo motor is fixed on described slide rail by motor mounting plate, drives described portable plate to slide along described slide rail during the motion of described AC servo motor；The top of described fixing plate and portable plate further respectively has and is perpendicular to the postive stop baffle that slide rail direction is arranged, and two postive stop baffles are respectively provided at the outside of two fixtures, and two postive stop baffles are for carrying out spacing to the two ends of truck drive shaft to be measured；Described support arrangement includes gripper shoe, two spring bearings and two bearing sliders, the T-shaped chute being perpendicular to slide rail direction is had above described gripper shoe, two spring bearings are separately fixed on two bearing sliders, two bearing sliders are arranged in described T-shaped chute and can along described T-shaped chute rectilinear motions, being equipped with hole, location on two bearing sliders, two bearing sliders are fixed in described gripper shoe by the bolt matched with hole, described location；Base below described slide rail is additionally provided with for magnetic railings ruler；Described wind connects described portable plate and for adjusting the initial position of described portable plate.
2. the length measurement method under a truck drive shaft constant pressure, it is characterised in that: the method adopts the length-measuring appliance under a kind of truck drive shaft constant pressure, and the method comprises the steps:
(1) wind is used to regulate portable plate to suitable position, put into standard component, standard component is the stiff shaft identical with the central siphon diameter of truck drive shaft to be measured, the two ends of standard component are respectively put in the fixture of two cylinder clamping device front ends, air inlet in two air inlets driving cylinder, two two ends driving air cylinder driven clamp standard component；Bearing slider below mobile spring bearing, regulate the position of spring bearing, make two pairs of spring bearings against standard component locking positioning bolt, complete the location of spring bearing, now stop driving the supply of cylinder, fixture restPoses, and takes standard component away, completes the spring bearing location work before detection；
(2) truck drive shaft to be measured is put into, air inlet in two air inlets driving cylinder, two two ends driving two clamp truck drive shafts to be measured of air cylinder driven, AC servo motor is run again with torque mode, AC servo motor drives portable plate to deviate from fixing plate direction along slide rail direction and moves, and truck drive shaft to be measured stretches gradually；
(3) stop motion after AC servo motor operation 2-3s, now truck drive shaft to be measured is in elongated condition, and the axle center of its central siphon and telescopic is on same straight line；Switching two blowing models driving cylinders, drive the air inlets of cylinders and venthole to supply to two simultaneously, two drive cylinder to provide to provide less centering power to fixture, and two fixtures clamp the two ends of truck drive shaft to be measured gently；
(4) antiport AC servo motor, AC servo motor still runs with torque mode, AC servo motor drives portable plate to move along slide rail direction to fixing plate direction, in this process, portable plate and two postive stop baffles above fixing plate contact with truck drive shaft both ends of the surface to be measured and compress truck drive shaft to be measured gradually, utilize force sensor measuring truck drive shaft pressure experienced to be measured in this process, and by force transducer, AC servo motor is carried out closed loop control, when the power that force transducer detects reaches preset value, AC servo motor keeps this moment to move, ensure that the force value that force transducer detects is certain value；
(5) reading of magnetic railings ruler is read, the data that magnetic railings ruler reads are the distance value of AC servo motor motion, this distance value is in the scope of fluctuation, in the process that force transducer retentivity is constant, the excursion detected when magnetic railings ruler is in the scope of ± 0.01mm and after stablizing more than 3s, read the reading of magnetic railings ruler, and using this reading length as truck drive shaft to be measured；
(6) antiport AC servo motor 2-3s after magnetic railings ruler measurement, stops two supply driving cylinders, and now fixture unclamps, and manually or automatically mode takes off truck drive shaft to be measured, completes the detection of single truck drive shaft to be measured；
(7) detection of next truck drive shaft to be measured is carried out, it is only necessary to repeat step 2-6.
3. the length measurement method under a kind of truck drive shaft constant pressure according to claim 2, it is characterized in that: the internal diameter of cylinder of described driving cylinder is 100mm, diameter of piston rod is 30mm, cylinder is driven to be provided with centering and two mode of operations of clamping, clamping pattern is the normal mode of operation of cylinder, now driving the air inlet air inlet of cylinder, venthole is given vent to anger, and drives the clamping force that cylinder provides to be sized to 3150-3800N；Under centering pattern, the air inlet while of air inlet and venthole, the pressure of the two air inlet is identical, and the lifting surface area that band is piston is different, now drives the centering power that cylinder provides
F=P × SPiston-P×(SPiston-SPiston rod)=P × SPiston rod
Wherein P is pressure, SPistonFor piston cross-section area, SPiston rodFor piston rod cross-sectional area, the centering power that F provides for cylinder, centering power is sized to 100-120N, and centering power is only for stretching truck drive shaft, the telescopic of guarantee truck drive shaft and the axle center of central siphon are on same straight line, but do not affect truck drive shaft and horizontally slip in fixture.
4. the length measurement method under a kind of truck drive shaft constant pressure according to claim 2, it is characterized in that: the position of described holder is the splined section of truck drive shaft to be measured, the rigidity of fixture and truck drive shaft contact portion to be measured is less than the rigidity of truck drive shaft splined section to be measured, and namely the rigidity of fixed chuck and active chuck and truck drive shaft contact portion to be measured is less than the rigidity of truck drive shaft splined section to be measured.
5. the length measurement method under a kind of truck drive shaft constant pressure according to claim 2, it is characterized in that: when the specifications and models of truck drive shaft to be measured change, only needing the standard component taking same specification to repeat step 1, recycle step 2-6 carries out the truck drive shaft length detection to be measured of this specification.
6. the length-measuring appliance under a kind of truck drive shaft constant pressure according to claim 1, it is characterised in that: the V-shaped design of contact surface of described active chuck and truck drive shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610168805.6A CN105806179B (en) | 2016-03-23 | 2016-03-23 | Length measurement method and its device under a kind of truck drive shaft constant pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610168805.6A CN105806179B (en) | 2016-03-23 | 2016-03-23 | Length measurement method and its device under a kind of truck drive shaft constant pressure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105806179A true CN105806179A (en) | 2016-07-27 |
| CN105806179B CN105806179B (en) | 2018-10-23 |
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| CN201610168805.6A Expired - Fee Related CN105806179B (en) | 2016-03-23 | 2016-03-23 | Length measurement method and its device under a kind of truck drive shaft constant pressure |
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| CN (1) | CN105806179B (en) |
Cited By (4)
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| CN106352766A (en) * | 2016-11-18 | 2017-01-25 | 成都世唯科技有限公司 | Device for measuring distance between positioning shaft shoulder and groove of pipe fitting |
| CN110375610A (en) * | 2019-08-21 | 2019-10-25 | 荆州恒隆汽车技术(检测)中心 | A kind of measuring device of automobile spider center point offset |
| CN114739550A (en) * | 2022-05-16 | 2022-07-12 | 横川机器人（深圳）有限公司 | Automatic output torque measuring device of torque motor |
| CN117053653A (en) * | 2023-10-11 | 2023-11-14 | 万向钱潮股份公司 | Length measuring device and method for cover plate universal joint |
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| CN103808235A (en) * | 2014-02-14 | 2014-05-21 | 奇瑞汽车股份有限公司 | Gap detection device of constant velocity universal joint drive shaft assembly |
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| GB477176A (en) * | 1936-07-20 | 1937-12-23 | Wilfred George Coram | Instrument for measuring perimeters of objects |
| FR2620223A1 (en) * | 1987-09-09 | 1989-03-10 | Inst Superieur Etat Surface | METHOD FOR SLIDING A MOBILE CARRIER ON A REFERENCE SURFACE AND ASSOCIATED DEVICE |
| CN1676950A (en) * | 2004-03-30 | 2005-10-05 | Smc株式会社 | Air servo cylinder apparatus and controlling method therefor |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106352766A (en) * | 2016-11-18 | 2017-01-25 | 成都世唯科技有限公司 | Device for measuring distance between positioning shaft shoulder and groove of pipe fitting |
| CN106352766B (en) * | 2016-11-18 | 2019-07-12 | 成都世唯科技有限公司 | It is a kind of measurement pipe fitting positioning shaft shoulder to distance between groove device |
| CN110375610A (en) * | 2019-08-21 | 2019-10-25 | 荆州恒隆汽车技术(检测)中心 | A kind of measuring device of automobile spider center point offset |
| CN110375610B (en) * | 2019-08-21 | 2024-04-12 | 武汉捷隆汽车电动转向***有限公司 | Measuring device for offset of center point of automobile cross axle |
| CN114739550A (en) * | 2022-05-16 | 2022-07-12 | 横川机器人（深圳）有限公司 | Automatic output torque measuring device of torque motor |
| CN114739550B (en) * | 2022-05-16 | 2024-02-20 | 横川机器人（深圳）有限公司 | Automatic measuring device for output torque of torque motor |
| CN117053653A (en) * | 2023-10-11 | 2023-11-14 | 万向钱潮股份公司 | Length measuring device and method for cover plate universal joint |
| CN117053653B (en) * | 2023-10-11 | 2024-01-26 | 万向钱潮股份公司 | Length measuring device and method for cover plate universal joint |
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| CN105806179B (en) | 2018-10-23 |
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