The truck drive shaft device for detecting length that a kind of band has elastic component
Technical field
The present invention relates to mechanical detection equipment technical field, more specifically more particularly to a kind of band has elastic component
Truck drive shaft device for detecting length.
Background technology
Truck drive shaft is the axis for being capable of passing power in the transmission shaft of universal driving device, it is a high rotating speed, lacks
The rotary body of supporting, truck drive shaft are the most important components of passing power in car transmissions, it is with gearbox, driving
The power of engine is passed to wheel by bridge together, and automobile is made to generate driving force.
Truck drive shaft is typically to be made of central siphon, telescopic and universal joint, the flexible both ends for being set on central siphon, two
Telescopic connects the both ends of central siphon by two universal joints respectively.Telescopic can be automatically adjusted between speed changer and drive axle
Distance change, universal joint realize two axis for ensureing that transmission output shaft and drive axle input shaft connect the variation of axis angle
Constant velocity tramsmission;The junction of central siphon and universal joint is set there are one baffle ring, baffle ring will be universal in axis bowl there are one connecting shaft bowl
Section blocks, and universal joint is made to link together with central siphon.
Truck drive shaft is before use, it is necessary to which to it, whether qualification is detected, the very important detection of one of which
Mesh is exactly to detect the length of truck drive shaft under a certain pressure, and the required precision of the length is very high, is directly related to
Can truck drive shaft normal use.Since the both ends of truck drive shaft are equipped with universal joint, it can not usually ensure truck drive shaft
Central siphon and two telescopics axle center on same straight line, therefore how to feel relieved, that is, ensure the pipe of truck drive shaft and stretch
The axle center of contracting set is that the length value measured in the case that the design difficulty of the present invention is not felt relieved is not on same straight line
Accurately.Simultaneously in the case of centering, truck drive shaft cannot be subject to excessive instantaneous pressure during measuring length.Right
During truck drive shaft carries out linear measure longimetry, it usually needs truck drive shaft is surveyed under the action of constant pressure
Amount, and when applying the power, instantaneous force value is excessive to generate bending directly at universal joint, cause the axle center of central siphon and telescopic
Offset so as to influence centering effect, causes measurement result inaccurate, therefore it is pre- how to ensure that the force value in measurement does not exceed
If value is also the difficult point of the present invention.
Meanwhile during truck drive shaft length detection, if being compressed using stepper motor to truck drive shaft,
Although can ensure constant pressure, cost is very high;And in the detection process of vehicle transmission shaft length, pressure it is steady
Qualitative requirement is very high, and force value cannot fluctuate, and common electric machine is difficult to realize the stabilization of power.
The content of the invention
Common electric machine can not ensure power during it is an object of the invention to solve existing truck drive shaft length detection
Stabilization the shortcomings that, it is proposed that the truck drive shaft device for detecting length that a kind of band has elastic component.
The technical proposal of the invention is realized in this way:The truck drive shaft length detection dress that a kind of band has elastic component
Put, including pedestal, slide, fixed plate, movable plate, cylinder clamping device, elastic element, motor driver, force snesor and
Support device, the slide are fixed on above pedestal, on the slide fixed plate and movable plate, the fixed plate are set to be fixed on
One end of slide, movable plate bottom is equipped with to be fixed on described with the matched sliding shoe of the slide, the motor driver
On slide, the bottom of the movable plate, which is fixed, to have elastic component, the electricity of one end connection motor driver of the force snesor
Head, the other end connect the elastic element, pass through the elastic element when motor driver moves and drive movable plate
It is moved on the slide;It is equipped with to clamp the cylinder at truck drive shaft both ends to be measured above the fixed plate and movable plate
Clamping device, the support device are arranged on the slide between fixed plate and movable plate, and the support device, which is used to support, to be treated
Survey the central siphon in the middle part of truck drive shaft;There are two the postive stop baffle is set, the upper of the fixed plate and movable plate is separately positioned on,
Two postive stop baffles are used to carry out /V to the both ends of truck drive shaft to be measured;It is additionally provided with and is used on pedestal below the slide
Measure the magnetic railings ruler of vehicle transmission shaft length to be measured.
Further, the elastic element is elastic cylinder.
Further, the motor driver includes stepper motor, shaft coupling, ball-screw and movable block, the step
Stepper motor connects one end of ball-screw by shaft coupling, and the movable block is equipped with and the matched screw thread of the ball-screw
Hole, the movable block connect the elastic element, the movement are driven by the ball-screw when stepper motor rotates
Block moves along a straight line, and movable block drives movable plate to move along a straight line along slide by the elastic element.
Further, the cylinder clamping device includes driving cylinder and fixture, and the fixture includes fixed chuck and work
Dynamic collet, fixed chuck are fixed on fixed plate or movable plate, and active chuck is fixed on the piston rod end of driving cylinder, driving
Cylinder drives the active chuck to be moved to fixed chuck direction.
Further, the V-shaped design of contact surface of the active chuck and truck drive shaft to be measured.
Further, the support device includes support plate, two spring bearings and two bearing sliders, the support plate
Top is provided with the T-shaped sliding slot perpendicular to slide direction, and two spring bearings are separately fixed on two bearing sliders, two bearings
Sliding block is arranged in the T-shaped sliding slot and can move along a straight line along the T-shaped sliding slot, and location hole is equipped on two bearing sliders,
Two bearing sliders with the matched positioning bolt of the location hole by being fixed in the support plate.
Further, the movable plate is also connected with for adjusting movable plate wind of position on slide manually.
The beneficial effects of the present invention are:
1st, the configuration of the present invention is simple is compact, and production cost is low, and occupies little space, and can realize the length of truck drive shaft
Measurement, high certainty of measurement will not be influenced be subject to automobile driving shaft bending.
2nd, the power that the present invention provides stepper motor using elastic element controls, and ensure that the stability of power, improves
The accuracy of measurement, and greatly reduce production cost.
3rd, the present invention first elongates truck drive shaft to be measured during the linear measure longimetry of truck drive shaft, protects
Demonstrate,prove truck drive shaft to be measured central siphon and telescopic axle center on the same line, then impose the pressure consistent with axis direction,
Should during force will likely curved truck drive shaft to be measured stretch, ensure the central siphon of truck drive shaft and the axle center of telescopic
On same straight line, the accuracy of measurement result is improved.
4th, the present invention utilizes the centering and clamping that drive cylinder while realization to truck drive shaft, the gap edge that the two needs
It is very big, and same driving cylinder can not usually realize loading two power of different sizes under normal conditions, the present invention utilizes driving
The venthole of cylinder carries out air inlet and outlet to realize the force value for changing same driving cylinder output respectively, saves equipment and accounts for
With space, the cost of equipment is reduced.
5th, the entire measuring device of the present invention is arranged on slide, by between the manual adjustment fixing plate of wind and movable plate
Distance, disclosure satisfy that the detection of different size truck drive shaft.
6th, driving cylinder is first used to clamp the both ends of truck drive shaft with smaller power during present invention operation, realizes that automobile passes
The centering of moving axis, then by stepping electricity two postive stop baffles is driven to compress truck drive shaft, the stepping when reaching the force value of setting
Motor continues to move through the balance of elastic element retentivity, is measured afterwards for a period of time in the force value that force snesor is kept constant
The length of truck drive shaft, improves the accuracy of measurement result, while avoids in measurement process because larger power will be to be measured
The problem of truck drive shaft press-bending causes measurement result inaccurate.
7th, the present invention by support device to being supported in the middle part of truck drive shaft, using first clamp both ends again to transmission
The method being supported in the middle part of axis, when the truck drive shaft to same batch different size is detected, it is only necessary to first in detection
The detection of the truck drive shaft of the similary specification of batch when being adjusted during a truck drive shaft to support device, it is convenient
Detection process.
8th, the present invention carries out measurement of length using magnetic railings ruler can effectively prevent influence of the external interference to measurement effect,
Improve the accuracy of measurement.
9th, during the actual measurement of truck drive shaft, the both ends of truck drive shaft can not usually determine the benchmark of measurement
Face;And the both ends of truck drive shaft are abutted two pieces of postive stop baffles by the present invention, two end faces of postive stop baffle and truck drive shaft connect
Tactile face is set as two reference planes, magnetic railings ruler is actual measure be two reference planes distance, measurement is convenient, greatly improves
The accuracy of measurement.
10th, the present invention sets elastic cylinder between motor driver and movable plate, and constant force is controlled by elastic cylinder,
Its is easy to operate, and stepper motor need to only move along a straight line, and the constant of power is realized by elastic cylinder, is adjusted by air pressure
The size of whole constant force reduces the positioning accuracy request of motor.
11st, force snesor of the invention is mounted between motor driver and elastic cylinder, effectively avoids force snesor
It is deformed when being directly installed between fixed seat and pedestal, so as to the problem of being had an impact to measurement accuracy;Force snesor is pacified
Between motor driver and elastic cylinder, even if force snesor generates deformation and will not influence the precision of measurement, improve
The accuracy of measurement result.
Description of the drawings
The present invention is described in further detail for embodiment in below in conjunction with the accompanying drawings, but does not form to the present invention's
Any restrictions.
Fig. 1 is the structure diagram of truck drive shaft of the present invention.
Fig. 2 is the axonometric drawing for the truck drive shaft device for detecting length that a kind of band of the present invention has elastic component.
Fig. 3 is the bottom view for the truck drive shaft device for detecting length that a kind of band of the present invention has elastic component.
In figure, 1- pedestals, 2- slides, 3- fixed plates, 4- movable plates, 5- postive stop baffles, 6- sliding shoes, 7- driving cylinder,
8- fixed chucks, 9- active chucks, 10- stepper motors, 11- truck drive shafts to be measured, 12- fix sliding block, 13- force snesors,
14- postive stop baffles, 15- motor mounting plates, 16- support plates, 17- spring bearings, 18- bearing sliders, 19- air admission holes, 20- outlets
Hole, 21- elastic elements, 22- ball-screws.
Specific embodiment
Refering to the truck drive shaft device for detecting length that shown in Fig. 1-Fig. 3, a kind of band of the invention has elastic component, including
Pedestal 1, slide 2, fixed plate 3, movable plate 4, cylinder clamping device, elastic element 21, motor driver, 13 and of force snesor
Support device, the slide 2 are fixed on 1 top of pedestal, fixed plate 3 and movable plate 4, the fixed plate 3 are set on the slide 2
One end of slide 2 is fixed on, 4 bottom of movable plate is equipped with and the 2 matched sliding shoe 6 of slide, the motor driver
It is fixed on the slide 2, the bottom of the movable plate 4, which is fixed, has elastic component 21, one end connection of the force snesor 13
The motor head of motor driver, the other end connects the elastic element 21, by described when the motor driver moves
Elastic element 21 drives movable plate 4 to be moved on the slide 2;The fixed plate 3 and 4 top of movable plate are equipped with to clamp
The cylinder clamping device at 11 both ends of truck drive shaft to be measured, the support device are arranged on the cunning between fixed plate 3 and movable plate 4
On rail 2, the support device is used to support the central siphon at 11 middle part of truck drive shaft to be measured;There are two the postive stop baffle 14 is set,
The upper of the fixed plate 3 and movable plate 4 is separately positioned on, two postive stop baffles 14 are used for the both ends to truck drive shaft 11 to be measured
Carry out /V;It is additionally provided with to measure the magnetic railings ruler of 11 length of truck drive shaft to be measured on the pedestal 1 of 2 lower section of slide.
The elastic element 21 is elastic cylinder.
The motor driver includes stepper motor 10, shaft coupling, ball-screw 22 and movable block 12, the stepping electricity
Machine 10 connects one end of ball-screw 22 by shaft coupling, and the movable block 12 is equipped with matched with the ball-screw 22
Threaded hole, the movable block 12 connect the elastic element 21, and the stepper motor 10 passes through the ball-screw 22 when rotating
The movable block 12 is driven to move along a straight line, movable block 12 drives movable plate 4 to be transported along 2 straight line of slide by the elastic element 21
It is dynamic.Stepper motor 10 is fixed on by motor mounting plate 15 on slide 2.
The cylinder clamping device includes driving cylinder 7 and fixture, and the fixture includes fixed chuck 8 and active chuck 9,
Fixed chuck 8 is fixed on fixed plate 3 or movable plate 4, and active chuck 9 is fixed on the piston rod end of driving cylinder 7, drives gas
Cylinder 7 drives the active chuck 9 to be moved to 8 direction of fixed chuck.
The V-shaped design of contact surface of the active chuck 9 and truck drive shaft 11 to be measured.
The support device includes 16, two spring bearings 17 of support plate and two bearing sliders 18, the support plate 16
Top is provided with the T-shaped sliding slot perpendicular to slide direction, and two spring bearings 17 are separately fixed on two bearing sliders 18, two
Bearing slider 18 is arranged in the T-shaped sliding slot and can move along a straight line along the T-shaped sliding slot, is equipped on two bearing sliders 18
Location hole, two bearing sliders 18 with the matched positioning bolt of the location hole by being fixed in the support plate 16.
The movable plate 4 is also connected with for adjusting the wind of position on slide 2 of movable plate 4 manually.
Method using device measurement vehicle transmission shaft length is as follows:
(1) movable plate 4 is adjusted to suitable position using wind, be put into standard component, standard component is to be passed with automobile to be measured
The identical stiff shaft of the central siphon diameter of moving axis 11, the both ends of standard component are respectively put into the fixture of two cylinder clamping device front ends
In, the air inlet into the air admission hole 19 of two driving cylinders 7, two driving cylinders 7 drive fixture to clamp the both ends of standard component;It is mobile
The bearing slider 18 of 17 lower section of spring bearing, adjusts the position of spring bearing 17, two pairs of spring bearings 17 is made to abut standard component simultaneously
Locking positioning bolt completes the positioning of spring bearing 17, stops the supply of driving cylinder 7 at this time, and fixture restPoses, takes
Standard component is walked, the spring bearing 17 before detection is completed and positions work;
(2) truck drive shaft 11 to be measured is put into, the air inlet into the air admission hole 19 of two driving cylinders 7, two driving cylinders 7
The both ends of two clamps truck drive shaft 11 to be measured are driven, run stepper motor 10, stepper motor 10 drives 4 edge of movable plate
It 2 direction of slide to move away from 3 direction of fixed plate, truck drive shaft 11 to be measured gradually stretches;
(3) stepper motor 10 runs stop motion after 2-3s, and truck drive shaft 11 to be measured is in elongated condition, and its at this time
The axle center of central siphon and telescopic is on same straight line;The blowing model of two driving cylinders 7 of switching, to two driving cylinders 7
Air admission hole 19 and venthole 20 supply simultaneously, two driving cylinders 7 provide to fixture and provide smaller centering power, two fixtures
Gently clamp the both ends of truck drive shaft 11 to be measured;
(4) antiport stepper motor 10, stepper motor 10 drive movable plate 4 along 2 direction of slide to 3 direction of fixed plate
Movement, two postive stop baffles 5 of 3 top of movable plate 4 and fixed plate are contacted with 11 both ends of the surface of truck drive shaft to be measured during being somebody's turn to do
And truck drive shaft 11 to be measured is gradually compressed, measure what truck drive shaft 11 to be measured was subject to using force snesor 13 in this process
Pressure, and pass through force snesor 13 and closed-loop control is carried out to stepper motor 10, reach default in the power that force snesor 13 detects
During value, stepper motor 10 continues to move and utilizes the balance of the power in the guarantee of elastic element 21 so that force snesor 13 detects
Power be always certain value;
(5) reading of magnetic railings ruler, the distance value that the data that magnetic railings ruler is read move for stepper motor 10, the distance value are read
In the range of fluctuation, during 13 retentivity of force snesor is constant, when the excursion that magnetic railings ruler detects ±
In the range of 0.01mm and after stable more than 3s, the reading of magnetic railings ruler is read, and using the reading as truck drive shaft 11 to be measured
Length;
(6) antiport stepper motor 102-3s after magnetic railings ruler measurement stops the supply of two driving cylinders 7, this
When fixture unclamp, manually or automatically mode removes truck drive shaft 11 to be measured, completes single truck drive shaft to be measured
11 detection;
(7) detection of next truck drive shaft 11 to be measured is carried out, it is only necessary to repeat step 2-6.
The internal diameter of cylinder of cylinder 77 is driven as 100mm, diameter of piston rod 30mm, driving cylinder 77 is equipped with centering and clamps
Two operating modes clamp the normal mode of operation that pattern is cylinder, drive 1919 air inlet of air admission hole of cylinder 77, outlet at this time
2020 outlet of hole, the clamping force size that driving cylinder 77 provides are 3150-3800N;Under centering pattern, air admission hole 1919 and outlet
The air inlet simultaneously of hole 2020, the pressure of the two air inlet is identical, and band is that the forced area of piston is different, drives what cylinder 77 provided at this time
Centering power
F=P × SPiston-P×(SPiston-SPiston rod)=P × SPiston rod
Wherein P be pressure, SPistonFor piston cross-section area, SPiston rodIt is accumulated for cross section of the piston rod, F is the centering that cylinder provides
Power, centering power size are 100-120N, and centering power is only used for stretching truck drive shaft, ensure the telescopic of truck drive shaft with
The axle center of central siphon does not influence truck drive shaft and horizontally slips in fixture on same straight line.
Embodiment provided above is the better embodiment of the present invention, only is used for facilitating illustrating the present invention, not to this hair
The limitation of bright work in any form, any those of ordinary skill in the art, if putting forward skill not departing from the present invention
In the range of art feature, using the equivalent embodiment for locally changing or modifying made by disclosed technology contents, and
Without departing from the technical feature content of the present invention, in the range of still falling within the technology of the present invention feature.