Summary of the invention
The present invention, in order to solve problems of the prior art, provides a kind of coaxiality check fixture of automobile hub bearing hole safe and reliable, simple to operation.
In order to realize above-mentioned object, technical scheme of the present invention is: a kind of coaxiality check fixture of automobile hub bearing hole, comprise base assembly, described base assembly is fixed with one for being set with the locating shaft of wheel hub to be detected, described base assembly is also rotationally connected a measurement lever, described measurement lever one end is stretched in the dead eye of wheel hub to be detected, and fits with dead eye inwall, and its moment is passed to the measuring head of the instrument be packed on base assembly by the other end of described measurement lever.
Preferably, described base assembly comprises the base for stationary positioned axle, also comprises the bearing be arranged on base, and the free end of described bearing is rotationally connected a support, and described measurement lever rotation is connected on this support; Also being provided with one makes support rest on the stop means measured on station.
Preferably, described stop means is the caging bolt be arranged on bearing, and the matching relationship of described caging bolt and support is as follows: at the measurement station of support, and the free termination of described caging bolt supports the lower end of support.
Preferably, described caging bolt is also provided with for adjusting and the setting nut of fastening caging bolt and bearing.
Preferably, the termination of described support is provided with a U-shaped connecting portion, described U-shaped connecting portion be enclosed within bearing free end and and its be rotationally connected.
Preferably, be also provided with for preventing support at the second stop means leaving inordinate rotation on the direction measuring station.
Preferably, this second stop means is the shelves pin for supporting U-shaped connecting portion sidewall be packed on bearing.
Preferably, the upper end of the free end of described support is provided with the lug boss for fixed instrumentation upwards, and lower end is provided with the downward-sloping wedge portion for being rotationally connected measurement lever, and described one end of measurement lever contacts cooperation with the measuring head of instrument when measuring.
Preferably, described instrument is clock gauge or dial gauge.
Preferably, described locating shaft is mounted obliquely within base.
Cubing of the present invention is when work, wheel hub to be detected is inserted on locating shaft, by adjustment caging bolt, make to measure the lower end of lever and the inwall laminating of dead eye, measure the upper end of lever and the measuring head laminating of instrument simultaneously, and instrument is pre-stressed to certain reading, by zero adjusting or after resetting, rotate wheel hub to be detected, by measurement lever, displacement is passed to the measuring head of instrument, and finally show in instrument.Cubing of the present invention, measures lever by one and test result is fed back to instrument, can improve the precision of measurement, and simple and reliable for structure, easy to operate.
The technical matters solved to make the present invention, the technical scheme of employing, the technique effect easy to understand obtained, below in conjunction with concrete accompanying drawing, be described further the specific embodiment of the present invention.
Front hub diaxon bearing bore is 7 class precisions, and the right alignment of holes is Φ 0.04mm, and the distance between two bearings gear is 72 ± 0.1mm.
With reference to figure 1, Fig. 2, the coaxiality check fixture in a kind of automobile hub bearing hole disclosed by the invention, the agent structure of cubing comprises base 1, bearing 4, support 10, clock gauge 13, detects lever 15 and locating shaft 18.
Base 1 is overall cast structure, and it is the structure of hollow, and be used for alleviating weight and the material consumption of cubing, base 1 also can be welded, but the stability of weldment and reliability comparatively cast difference, and for the manufacture of cubing, the present invention preferentially selects cast structure.Bearing 4 can process with steel, and available two taper bolts 3 and four socket head cap screws 2 are fixed on base 1.Support 10 is by shipping and reselling on another market 8 with the free end of bearing 4 (with the view direction of Fig. 1 for reference, be the upper end of bearing 4) connect, rotate to make support 10 pin 8 that can easily rotate reliably, here will be shipped and resell on another market by screw 98 fixing dead with bearing 4, support 10 and ship and resell on another market 8 cooperation be preferably clearance fit H8/g7, support 10 and bearing 4 can not coordinate requirement, as long as ensure gap) so that assembling.Those of ordinary skill in the art are easy to expect allowing 8 and bearing 4 transition fit of shipping and reselling on another market, and just do not need to be secured by screw 9, but the method can increase the assembly difficulty of cubing greatly, no longer illustrates at this.
Base 1, bearing 4 and support 10 constitute the base assembly of cubing of the present invention, bearing 4 is arranged on base 1, base 1 is fixed with one for being set with the locating shaft 18 of wheel hub to be detected, free end and the measurement lever 15 of described support 10 are rotationally connected, one end of described measurement lever 15 is stretched in the dead eye of wheel hub to be detected, and fit with the inwall of dead eye, its moment is passed to the measuring head being fixedly mounted with instrument over the mount 10 by its other end.
Cubing of the present invention is when work, wheel hub to be detected is inserted on locating shaft 18, makes to measure the lower end of lever 15 and the inwall laminating of dead eye, rotate wheel hub to be detected, by measurement lever, displacement is passed to the measuring head of instrument, and finally show in instrument.
Support 10 of the present invention can rotate on the carrier 4, when support 10 and bearing 4 are rotationally connected time, is also provided with one and makes support 10 rest on the stop means measured on station.This is spacing can be supported between support 10 and base 1, the present invention preferably adopts a fixing caging bolt 6 on the carrier 4, the matching relationship of this caging bolt 6 and support 10 is as follows: at the measurement station of support 10, and the free termination of described caging bolt 6 supports the lower end of support 10.With the direction of Fig. 1 for reference, when measurement, swinging mounting 10, makes the lower end of support 10 be against on the free end of caging bolt 6, so that support 10 rests on measurement station.According to actual needs, caging bolt 6 height is on the carrier 4 regulated, i.e. the measurement station of adjustable support 10.The preferred structure of the present invention is: described caging bolt 6 is also provided with the setting nut 5 for fastening caging bolt 6 and bearing 4.By adjustment setting nut 5, caging bolt 6 is made to be in suitable position, then setting nut is on the carrier 4 fastening, in case caging bolt 6 has small movement and affects accuracy of detection in measuring process.
With reference to figure 3, the termination of support 10 also can be provided with a U-shaped connecting portion 101, described U-shaped connecting portion 101 be enclosed within bearing 4 free end and and its 8 to be rotatably connected by shipping and reselling on another market.Also be provided with for preventing support 10 at the second stop means leaving inordinate rotation on the direction measuring station." measure the direction of station " to refer to: with the direction of Fig. 1 for reference, during use, rotate counterclockwise support 10, make to be supported on caging bolt 6, leave the direction measuring station and refer to clockwise rotation direction.The Main Function of the second stop means is exactly prevent support 10 inordinate rotation in the direction in which.This second stop means can for being packed in the shelves pin 7 for supporting U-shaped connecting portion 101 sidewall on bearing 4.Backing pin 7 and bearing 4 can be transition fit H7/n6, here also welding can be adopted, but welding is unfavorable for the replacing of pin, treat that workpiece sensing is complete, parts such as support 10 grade can be rotated up, make support 10 lean against on backing pin 7, to facilitate taking-up workpiece, the angle that support 10 rotates is greater than vertical direction, selects the anglec of rotation to be greater than the position that vertical direction about 15 ° arranges backing pin 7 here.
The fixed form of instrument and support 10 can adopt mechanism known in the art, the present invention is preferably: the upper end of described support 10 free end is provided with the lug boss 102 for fixed instrumentation upwards, the connecting link of instrument is through the via hole 1021 that lug boss 102 is arranged, and by arranging a lock-screw 14 on the fixed orifice 1020 through with via hole 1021, thus this instrument is fixed over the mount 10, the metrical error that the movement due to clock gauge 13 causes can be prevented.Instrument of the present invention can be clock gauge 13, also can be the measurement instruments known in the art such as dial gauge.The lower end of support 10 free end is provided with the downward-sloping wedge portion 103 for being rotationally connected measurement lever 15, specifically, the length direction in this wedge portion 103 is provided with axis hole 1030, the Width in this wedge portion 103 is provided with one and the through fluting 1031 of axis hole, measuring lever is arranged in fluting 1031, ship and resell on another market 16 through the pin-and-hole on axis hole 1030 and measurement lever 15, thus measurement lever 15 and support 10 are rotationally connected, ship and resell on another market 16 and support 10 can be the clearance fit of clearance fit H8/g7 or larger, in order to prevent 16 rotations of shipping and reselling on another market, also be provided with two screws 17 will ship and resell on another market 16 and wedge portion 103 fix, make the detection of detection lever 15 more reliable.Detect the pin-and-hole of lever 15 and ship and resell on another market and 16 be preferably clearance fit, gap is 0.005mm-0.01mm.
Can be designed to different ratios by measuring the arm of force of lever 15, realizing detecting zooming in or out of data, being such as 10:1 by arm of force Proportionality design, is 0.1 μ with regard to being equivalent to the indicating accuracy of clock gauge.Here because right alignment requires as Φ 0.04mm, so power arm ratio is 1:1.Regulate the arm of force measuring lever 15, this cubing can be made to be applicable to high-precision detection.The test result of the present invention in order to make measurement lever 15 feed back workpiece better, also be provided with a lug boss 160 for fitting with dead eye inwall measuring the termination of lever 15, in order to obtain higher accuracy of detection, measure lever to need to carry out polishing for the two measured, here roughness is that below Ra1.6 increases.
Locating shaft 18 of the present invention, is connected on base 1 by socket head cap screw 19, and the dead eye of locating shaft 18 and wheel hub to be measured adopts H7/g6 to coordinate, and needing first is here precision H7 the Size Conversion of workpiece hole.Locating shaft 18 of the present invention, be arranged on to preferred angled on base 1, namely locating shaft 18 and surface level is made to have a certain degree, become 15 ° of angles here, such testing staff guarantee locating shaft 18 and workpiece when turning of work piece (wheel hub to be detected) form good contact, thus eliminate the gap of location, avoid metrical error, simultaneously due to the downward-sloping certain angle of locating shaft 18, make testing staff more easily reliable when turning of work piece; The end face of locating shaft 18 need polish, like this can by the distance between digital display vernier depth gauge measurement two bearings gear.
Cubing of the present invention, for the ease of operation, is also provided with handle 12, and fixing over the mount 10 by two set nuts 11, and reliable lock is more convenient to operate.
With reference to figure 4, cubing of the present invention when in use, front hub 20 is enclosed within locating shaft 18, due to locating shaft 18 and surface level at an angle, under the Action of Gravity Field of front hub 20 self, operating personnel more easily ensure fitting tightly of reference axis bearing bore and locating shaft when turning of work piece, the metrical error that can effectively prevent Workpiece fixing from causing.Regulate the height of caging bolt 6, and locked with setting nut 5, hand-held handle 12 swinging mounting 10, support 10 is made to be supported on caging bolt 6, the measurement lower end of lever 15 and the inwall of front hub 20 dead eye are fitted, during detection, by front wheel hub 20, the right alignment of measured hole and datum hole can feed back to dial gauge or clock gauge 13 by detecting lever 15.Workpiece is rotated a circle, change the numerical value that just can obtain workpiece spindle bearing bore right alignment by the reading of dial gauge or clock gauge.After measurement completes, hand-held handle 12 swinging mounting 10, makes support 10 lean against on backing pin 7, to facilitate the taking-up of front hub 20.Cubing of the present invention, it is simple and reliable for structure, measuring accuracy is high, and easy to operate, effectively can not only measure the right alignment of front hub dead eye, can also by digital display vernier depth gauge can measure exactly two bearings gear between distance.
The present invention is by preferred embodiment having carried out detailed explanation.But, by studying carefully above, to the change of each embodiment with to increase also be that one of ordinary skill in the art institute is apparent.Being intended that all these changes and increasing of applicant has all dropped in scope that the claims in the present invention protect.
Similar numbering refers to similar element in the whole text.For clarity, the situation of some line, layer, element, parts or feature being amplified may be had in the accompanying drawings.
Term used herein is only and is illustrated specific embodiment, and it is also not intended to limit the invention.Unless otherwise defined, all terms used herein (comprising technical term and scientific terminology) are all identical with the understanding of one of ordinary skill in the art of the present invention.