CN111024806B

CN111024806B - Device for detecting outer ring of hub bearing

Info

Publication number: CN111024806B
Application number: CN201911276894.6A
Authority: CN
Inventors: 李二龙; 王杰; 伍剑波
Original assignee: Sichuan University
Current assignee: Sichuan University
Priority date: 2019-12-12
Filing date: 2019-12-12
Publication date: 2021-12-21
Anticipated expiration: 2039-12-12
Also published as: CN111024806A

Abstract

The invention belongs to the technical field of hub bearing detection, and particularly relates to a device for detecting an outer ring of a hub bearing, which comprises an upper mounting seat, a lower mounting seat, a rack, an upper positioning assembly and a lower positioning assembly, wherein the upper positioning assembly and the lower positioning assembly are arranged in a mirror image mode, the rack is arranged on the rack, the rack is connected with the upper mounting seat and can reciprocate relative to the upper mounting seat, the lower positioning assembly is arranged on the lower mounting seat, the central lines of the upper positioning assembly and the lower positioning assembly are positioned on the same vertical line, a plurality of steel balls which are used for positioning the outer ring of the bearing and can freely rotate around the center of the steel balls are arranged in the upper positioning assembly and the lower positioning assembly, the upper positioning assembly and the lower positioning assembly are respectively provided with a detection assembly for detecting the outer ring of the bearing, and the rack is also provided with a driving assembly for driving the outer ring of the bearing to rotate. The nondestructive testing device is efficient and convenient, and has the advantages of high positioning precision, strong structural stability, high nondestructive testing and testing speed on the tested parts and the like.

Description

Device for detecting outer ring of hub bearing

Technical Field

The invention belongs to the technical field of hub bearing detection, and particularly relates to a device for detecting an outer ring of a hub bearing.

Background

The hub bearing is one of key parts of an automobile, the traditional hub bearing of the automobile is formed by combining two sets of tapered roller bearings or ball bearings, and because the installation, the oiling, the sealing and the clearance adjustment of the bearing are finished on an automobile production line, the automobile is difficult to produce and assemble, high in cost and poor in reliability; the hub bearing unit is developed on the basis of a standard angular contact ball bearing and a tapered roller bearing, the two sets of bearings are integrated, and the hub bearing unit has the advantages of fewer assembling parts, good assembling performance, light weight, compact structure, large load capacity, omission of external hub sealing and the like, but cracks can be generated in the using process, so that the outer ring of the bearing is broken, the safety performance of an automobile is reduced, and traffic accidents are easy to happen. Therefore, the hub bearing outer ring needs to be detected, when the hub bearing outer ring is detected by using a traditional device, the positioning precision of the hub bearing outer ring is low, and the arc track in the bearing outer ring is easily damaged during the detection, so that the quality of the detected hub bearing outer ring is influenced.

Disclosure of Invention

In order to solve the above problems in the prior art, the present invention aims to provide a device for detecting a hub bearing outer ring, so as to solve the problems that the detection device in the prior art is not accurate enough in positioning, and the positioning device is prone to causing defects to the bearing outer ring due to excessive friction.

The technical scheme adopted by the invention is as follows:

the utility model provides a device for detecting wheel hub bearing inner race, includes mount pad, mount pad and frame down, still includes last locating component and lower locating component that the mirror image set up, it sets up in the frame to go up locating component, the frame is connected with last mount pad and can goes up the mount pad relatively and make reciprocating motion, locating component sets up under on the mount pad down, it is located same vertical on-line with locating component's central line down to go up locating component, it all is provided with a plurality ofly in locating component and the lower locating component and is used for fixing a position the bearing inner race and can wind self centre of sphere free rotation's steel ball to go up locating component, it all is provided with the determine module that is used for detecting the bearing inner race to go up locating component and locating component down, still be provided with in the frame and be used for driving bearing inner race pivoted drive assembly.

Further, the frame is connected with last mount pad through the cylinder, the frame includes installation piece, connecting plate and the mounting panel that has the mounting hole, the cylinder includes cylinder body and cylinder piston rod, the tip at cylinder piston rod is connected to the installation piece, the mounting panel passes through the connecting plate and is connected with the installation piece, cylinder body connects on last mount pad.

The frame mainly used fixes drive assembly and goes up locating component, the mounting panel mainly used supports and fixes drive assembly, mounting hole on the mounting panel mainly makes things convenient for being connected between drive assembly and the mounting panel, the installation piece mainly used connects last locating component and mounting panel, be connected through two connecting plates between mounting panel and the installation piece, the connecting plate has certain height, make and keep certain space between mounting panel and the installation piece, be convenient for go up locating component's arrangement and installation, be connected cylinder body and last mount pad, can realize the fixed of cylinder, thereby drive the frame and connect locating component and drive assembly in the frame and make reciprocating motion.

Furthermore, the upper positioning assembly comprises an upper shaft, an upper shaft metal retainer, an upper shaft inner ring and a steel ball, the bottom end of the mounting block is connected with a guide block, the upper shaft is connected with the guide block through an elastic piece, the upper shaft metal retainer is connected with the upper shaft in a sliding mode, a spring is arranged between the upper shaft metal retainer and the upper shaft, the upper shaft inner ring is rotatably connected to the upper shaft, the upper shaft inner ring is located in the upper shaft metal retainer, the steel ball is arranged between the upper shaft metal retainer and the upper shaft inner ring, a placing hole for placing the steel ball is formed in the upper shaft metal retainer, and a leakage hole which is convenient for the steel ball to contact with the bearing outer ring is formed in the placing hole.

The upper shaft is used as a main carrier and a connecting piece of the upper positioning assembly and is used for connecting a guide block and an upper shaft metal retainer and providing a mounting carrier for an inner ring of the upper shaft, one end of the upper shaft is connected with the guide block through an elastic piece which can enable the upper positioning assembly and the guide block to have certain buffering, the elastic piece can adopt a form of a telescopic rod and a buffer spring, in order to realize the positioning of the upper positioning assembly on an outer ring of a bearing, the upper shaft inner ring is rotatably connected on the upper shaft, the other end of the upper shaft is connected with the upper shaft metal retainer, a steel ball is arranged in the upper shaft metal retainer and is positioned between the upper shaft metal retainer and the upper shaft inner ring, a plurality of placing holes for placing the steel ball are arranged in the upper shaft metal retainer, the placing steel ball rolls in the upper shaft metal retainer, the upper shaft metal retainer is in a bowl shape, and the placing holes are uniformly arranged on the side wall of the upper shaft metal retainer along the circumference, specifically, 6 placing holes can be uniformly arranged on the circumference of the upper shaft metal retainer, the placing holes are provided with leak holes which are convenient for the steel balls to contact with the bearing outer ring, namely, the round hole formed after the placing holes are intersected with the outer wall of the upper shaft metal retainer is the leak hole, one side of the upper shaft inner ring close to the steel balls is provided with a circular arc track matched with the steel balls, a variable space is arranged between the upper shaft metal retainer and the upper shaft inner ring, so that the steel balls can keep a certain moving space, when the space is enlarged, the steel balls can be drawn close to the rotation center of the upper shaft metal retainer so that the steel balls can smoothly enter the bearing outer ring, when the space is reduced to the extent that the steel balls just contact with the circular arc track of the upper shaft inner ring and the circular arc track of the bearing outer ring, the steel balls can realize the positioning of the upper positioning component on the bearing outer ring, so as to control the space between the upper shaft metal retainer and the upper shaft inner ring, the upper shaft metal retainer is connected with the upper shaft in a sliding mode, the spring is arranged between the upper shaft metal retainer and the upper shaft, and the spring can enable the relative distance between the upper shaft metal retainer and the upper shaft metal retainer to be the farthest under the condition that the upper shaft metal retainer and the upper shaft metal retainer are not subjected to external force, namely the space between the upper shaft metal retainer and the inner ring of the upper shaft is the largest.

The positioning component comprises an upper positioning component and a lower positioning component so as to realize the accurate positioning of the bearing outer ring, the lower positioning component is arranged on the lower mounting seat and comprises a lower shaft, a lower shaft metal retainer, a lower shaft inner ring and a steel ball, because the lower positioning component and the upper positioning component are arranged in a mirror image manner, the lower shaft metal retainer and the lower shaft inner ring are arranged in a mirror image manner relative to the upper shaft, the upper shaft metal retainer and the upper shaft inner ring, specifically, the lower shaft is fixedly connected on the lower mounting seat, the lower shaft metal retainer and the lower shaft are connected in a sliding manner, a spring is arranged between the lower shaft metal retainer and the lower shaft, the inner ring of the lower shaft is rotationally connected on the lower shaft, the steel ball sets up between lower axle metal holder and lower axle inner race, be provided with the hole of placing the steel ball under the lower axle metal holder, it is equipped with the small opening that makes things convenient for steel ball and bearing inner race to contact to place the hole under.

Furthermore, the upper shaft inner ring is rotationally connected to the upper shaft through an angular contact bearing. Because the inner ring of the upper shaft is rotationally connected to the upper shaft, when the steel ball is positioned, one side of the steel ball is attached to the circular arc track in the outer ring of the bearing, and the other side of the steel ball is attached to the circular arc track of the inner ring of the upper shaft, when the outer ring of the bearing rotates, the steel ball can be driven to rotate due to the friction force, the friction force between the steel ball and the inner ring of the upper shaft can drive the inner ring of the upper shaft to rotate, so the rotation of the inner ring of the upper shaft can be influenced by the friction force between the inner ring of the upper shaft and the upper shaft, if the friction force between the inner ring of the upper shaft and the upper shaft is too large, relative sliding can be generated between the steel ball and the outer ring of the bearing instead of pure rolling motion relation, therefore, scratches can be easily generated on the circular arc track of the outer ring of the bearing, so as to influence the quality of the outer ring of the bearing, in order to avoid the above situation, the inner ring of the upper shaft is rotationally connected with the upper shaft through the angular contact bearing, specifically, a shaft shoulder is arranged on the inner wall of the inner ring of the upper shaft, the two sides of the shaft shoulder are respectively provided with an angular contact bearing, the outer ring of the angular contact bearing is in interference fit with the inner wall of the inner ring of the upper shaft, and the angular contact bearing is arranged, so that the friction force between the inner ring of the upper shaft and the upper shaft is reduced, the rotation of the outer ring of the bearing is facilitated, and the damage of the arc track of the outer ring of the bearing due to the fact that the friction force is too large is avoided.

The lower shaft inner ring is also rotationally connected to the lower shaft through an angular contact bearing, and the specific function and effect are the same as those of the upper shaft inner ring which is rotationally connected to the upper shaft through the angular contact bearing.

Furthermore, a groove is formed in one end, close to the upper shaft metal retainer, of the upper shaft, two through holes with center lines located on the same horizontal line are formed in the side wall of the groove, a boss is arranged at one end, close to the upper shaft, of the upper shaft metal retainer, vertical U-shaped grooves are symmetrically formed in the circumference of the boss, a gasket with the same size as the cross section area of the boss is fixed at the tail end of the boss, and the upper shaft is connected with the upper shaft metal retainer through a pin penetrating through the through holes and located in the U-shaped grooves.

The upper shaft and the upper shaft metal retainer can be in sliding connection in various ways, for example, a sliding rail and sliding groove matched form or a cylinder connected form is adopted, in order to achieve the purpose of structural simplification, the sliding connection is achieved by adopting a boss and groove matched form, namely, a groove is arranged at one end of the upper shaft close to the upper shaft metal retainer, a boss matched with the groove is arranged at one end of the upper shaft metal retainer close to the upper shaft, a spring is arranged in the groove, two ends of the spring are respectively contacted with the bottom of the groove and the boss, the boss is easy to slide out of the groove due to the adoption of the boss and groove form, in order to prevent the above situation, vertical U-shaped grooves are symmetrically arranged on the circumference of the boss, the symmetrical lines of the two U-shaped grooves are the central lines of the boss, and a gasket with the same size as the cross section area of the boss is fixed at the tail end of the boss, the upper end of the U-shaped groove is sealed by the gasket to form a sealed groove, two through holes are formed in the side wall of the groove of the upper shaft, the positions of the through holes correspond to those of the U-shaped groove, then pins are inserted into the two through holes, one end of each pin is inserted into the U-shaped groove of the upper shaft metal retainer, the pins are matched with the gasket, the boss of the upper shaft metal retainer cannot slide out of the groove of the upper shaft, and the gasket is fixed at the tail end of the boss, so that two ends of the spring are respectively contacted with the gasket and the bottom of the groove.

Because the reason that locating component and last locating component mirror image set up down, the one end that the lower shaft is close to lower shaft metal holder also is provided with the recess, the lateral wall of recess is provided with two through-holes that the central line is located same water flat line down, be close to in the lower shaft metal holder the one end of axle is provided with the boss, the symmetry is provided with vertical "U" type groove on the circumference of boss, the end of boss is fixed with the gasket the same with boss cross-sectional area size, the lower shaft is connected through the pin that passes the through-hole and be located "U" type inslot with lower shaft metal holder, be provided with the spring between gasket and the recess bottom.

Further, the diameter of the placing hole is larger than that of the steel ball, and the diameter of the leak hole is smaller than that of the steel ball. Because the steel ball needs to move a little toward the center of the upper shaft metal retainer when entering the detected bearing outer ring, the steel ball needs to contact with the arc track on the bearing outer ring after entering the bearing outer ring to realize the positioning of the bearing outer ring, therefore, the steel ball needs to move in the placing hole of the upper shaft metal retainer, the diameter of the placing hole is set to be larger than that of the steel ball, but the diameter of the placing hole cannot be too large, when the steel ball moves to the limit side of the placing hole, the positioning component can enter the bearing outer ring, the limit side of the placing hole is the side of the placing hole farthest from the inner wall of the bearing outer ring when the positioning component enters the bearing outer ring, in order to realize the contact of the steel ball and the arc track of the bearing outer ring, the placing hole is provided with a leak hole, namely the leak hole generated by the intersection between the placing hole and the outer side face of the upper shaft metal retainer, the diameter of the leak hole is smaller than that of the steel ball, so that the steel ball is prevented from sliding out of the upper shaft metal retainer from the leak hole.

Further, drive assembly includes driving motor, round pin axle and the annular slip axle sleeve of circle, driving motor sets up on the mounting panel, the slip axle sleeve rotates to be connected in the mounting hole of mounting panel, driving motor is connected with the transmission of slip axle sleeve, the axis of bearing inner race and the axis collineation of slip axle sleeve work as when the frame is towards the motion of lower mount pad, the frame drives positioning assembly and runs through the slip axle sleeve sets up the round pin epaxial drive bearing inner race that slides rotates.

The driving assembly mainly provides driving force for a bearing outer ring to be detected and drives the bearing outer ring to rotate, the driving motor is used for providing driving force and fixing the driving force on the mounting plate, the sliding shaft sleeve is used for driving the bearing outer ring to rotate, therefore, the sliding shaft sleeve is rotatably connected on the mounting plate, in order to facilitate mounting, a circular mounting hole is arranged on the mounting plate, the size of the mounting hole is the same as that of the sliding shaft sleeve, the connection tightness is ensured, the mounting hole is in clearance fit with the sliding shaft sleeve, the rotation of the sliding shaft sleeve is ensured, in order to prevent the sliding shaft sleeve from falling off after being mounted in the mounting hole, a circular end cover can be mounted at the upper end of the sliding shaft sleeve, the circular end cover is fixedly connected with the sliding shaft sleeve, the diameter of the circular end cover is larger than the inner diameter of the mounting hole, the sliding shaft sleeve is clamped on the mounting plate, so that the sliding shaft sleeve is prevented from falling off the mounting plate, and the bearing outer ring is usually rotated by itself to realize omnibearing detection during detection, therefore, in order to realize that the sliding shaft sleeve drives the bearing outer ring to rotate and keeps the bearing outer ring to rotate, the bearing outer ring is fixedly connected with the sliding shaft sleeve, and the axis of the bearing outer ring is kept to be collinear with the axis of the sliding shaft sleeve; the driving motor is in transmission connection with the sliding shaft sleeve, so that the driving force of the driving motor is conveniently transmitted to the sliding shaft sleeve, and the rotation of the outer ring of the bearing is realized.

Further, a driving gear is arranged on a driving shaft of the driving motor, a driven gear is fixedly connected to the bottom of the sliding shaft sleeve, and the driving gear is meshed with the driven gear. Can transmit through various transmission modes between driving motor and the slip axle sleeve, if adopt belt drive, chain drive or gear drive etc, adopt gear drive to be convenient for arrange and install in this device, and gear drive has transmission efficiency height, the drive ratio is accurate, long-lived, transmission power is big and transmission precision advantage such as high, it is concrete, be provided with the driving gear in driving motor's drive shaft, bottom fixedly connected with driven gear at the slip axle sleeve, adopt the screw to connect between driven gear and the slip axle sleeve, because be connected through the round pin axle between slip axle sleeve and the bearing outer lane, and driven gear sets up between slip axle sleeve and the bearing outer lane, consequently, be provided with the hole that supplies the round pin axle to pass on the driven gear.

Furthermore, the upper positioning assembly is provided with two detection assemblies, and the axes of the upper positioning assemblies of the two detection assemblies are symmetrically arranged by taking the central line as the axis; the lower positioning assembly is also provided with two detection assemblies, and the axes of the lower positioning assemblies of the two detection assemblies are symmetrically arranged as a central line. Go up two determine module on locating component and the lower locating component and all set up with its axis symmetry, two determine module of upper and lower locating component are 180 settings promptly, when the bearing outer lane rotates and detects, only need rotate 180 and can realize the all-round detection of bearing outer lane.

Further, the detecting component comprises a detecting probe mounting part and a U-shaped magnetic pole, the U-shaped magnetic pole is sleeved at one end where the detecting probe of the detecting probe mounting part is located, and the other end of the detecting probe mounting part is fixed on the upper shaft. U type magnetic pole mainly used carries out local magnetization with the bearing inner race, contains the magnetic leakage test probe in the test probe installed part, and the magnetic leakage test probe detects the magnetic field that the bearing inner race that is magnetized produced to judge whether there is the defect in bearing inner race, the testing process adopts the magnetic leakage detection technique, and the magnetic leakage detects the nondestructive test method that is very important, uses very extensively, also is very ripe prior art, does not describe here any more.

The invention has the beneficial effects that:

the invention realizes the positioning of the bearing outer ring by arranging the upper positioning component and the lower positioning component with the central lines positioned on the same vertical line, the driving component and the upper positioning device are arranged on the frame by arranging the frame which can do up-and-down reciprocating motion, the driving component is used for driving the bearing outer ring to rotate, the bearing outer ring is convenient to carry out all-dimensional detection, the upper positioning device can do up-and-down reciprocating motion, the positioning device can conveniently enter the bearing outer ring for positioning, and the upper positioning device and the lower positioning device are controlled to withdraw from the bearing outer ring after the detection is finished so as to take out the bearing outer ring, a plurality of steel balls which can freely rotate around the ball centers of the upper positioning component and the lower positioning component are arranged in the upper positioning component and the lower positioning component, the steel balls are wound in the bearing outer ring, the accurate positioning of the bearing outer ring is ensured, and the rolling friction is formed between the steel balls and the bearing outer ring, the friction is little, can not cause the defect to the circular arc track of bearing inner race at the bearing inner race rotation in-process, and the detection subassembly detects the bearing inner race through the magnetic leakage detection technique.

The invention is a high-efficient convenient nondestructive test device, through finding the defect, reject the defective work, thus strengthen the bearing reliability, guarantee the safe driving of car, this apparatus has high, structural stability strong, to the advantage such as being fast of nondestructive inspection and flaw detection of the part to be detected of positioning accuracy.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the structure of the feeding and discharging part and the base of the present invention;

FIG. 3 is a right side view of FIG. 2;

FIG. 4 is a cross-sectional view taken along line A-A of FIG. 3;

FIG. 5 is a schematic structural view of a feeding and discharging part in the present invention;

FIG. 6 is a schematic view of the inner structure of the feeding and discharging part of the present invention;

FIG. 7 is a schematic structural view of an upper shaft metal cage according to the present invention;

FIG. 8 is a schematic view of the construction of the upper shaft inner race of the present invention;

FIG. 9 is a schematic view of magnetic lines of force of the U-shaped magnetic pole of the present invention;

FIG. 10 is an enlarged schematic view at B of FIG. 1;

FIG. 11 is a schematic view of the structure of the outer ring to be measured according to the present invention;

FIG. 12 is a schematic view of the structure of the upper shaft in the present invention;

in the figure: 1-a cylinder body; 2-a cylinder piston rod; 3-driving a motor; 4-a drive gear; 5-a pin shaft; 6-bearing outer ring; 7-a detection component; 8-lower mounting seat; 9-a positioning assembly; 10-a driven gear; 11-a mounting plate; 12-round end caps; 13-sliding shaft sleeve; 14-a connecting plate; 15-adjusting block; 16-a mounting block; 17-a guide block; 18-a buffer spring; 19-a telescopic rod; 701-detecting a probe mount; 702-U-shaped magnetic pole; 901-upper shaft; 902-upper shaft metal cage; 9021-placing hole; 9022-leak hole; 903-upper shaft inner ring; 904-steel ball; 905-lower shaft metal cage; 906-lower shaft inner race; 907-angular contact bearing; 908-lower shaft.

Detailed Description

The invention is further described with reference to the following figures and specific embodiments.

Example 1:

as shown in figure 1, a detection device for wheel hub bearing outer ring 6, including last mount pad, lower mount pad 8 and frame, still include last locating component and lower locating component that the mirror image set up, it sets up in the frame to go up locating component, the frame is connected with last mount pad and can be relatively go up the mount pad and make reciprocating motion, locating component sets up under on mount pad 8 down, it is located same vertical on-line with locating component's central line down to go up locating component, it all is provided with a plurality ofly in locating component and the lower locating component and is used for fixing a position bearing outer ring 6 and can wind self centre of sphere free rotation's steel ball 904, it all is provided with detection module 7 that is used for detecting bearing outer ring 6 to go up locating component and locating component down, still be provided with in the frame and be used for driving bearing outer ring 6 pivoted drive assembly.

The invention realizes the positioning of the bearing outer ring 6 by arranging the upper positioning component and the lower positioning component with the central lines positioned on the same vertical line, the invention realizes the positioning of the bearing outer ring 6 by arranging the rack which can do up-and-down reciprocating motion, the driving component and the upper positioning device are both arranged on the rack, the driving component is used for driving the bearing outer ring 6 to rotate, the omnibearing detection of the bearing outer ring 6 is convenient, the upper positioning device can do up-and-down reciprocating motion, the positioning device can conveniently enter the bearing outer ring 6 for positioning, and the upper positioning device and the lower positioning device are controlled to withdraw from the bearing outer ring 6 after the detection is finished, the bearing outer ring 6 is taken out, a plurality of steel balls 904 which can freely rotate around the self spherical center are arranged in the upper positioning component and the lower positioning component, the steel balls 904 are parts which are directly contacted with the bearing outer ring 6, the plurality of steel balls 904 are encircled in the bearing outer ring 6, the accurate positioning of the bearing outer ring 6 is ensured, and the rolling friction is formed between the steel balls 904 and the bearing outer ring 6, frictional force is little, can not cause the defect to bearing inner race 6's circular arc track at bearing inner race 6 rotation in-process, and detection subassembly 7 detects bearing inner race 6 through the magnetic leakage detection technique.

Example 2:

as a preferred technical solution of the present invention, on the basis of embodiment 1, the frame is connected to the upper mounting base through an air cylinder, the frame includes a mounting block 16, a connecting plate 14 and a mounting plate 11 with a mounting hole, the air cylinder includes an air cylinder body 1 and an air cylinder piston rod 2, the mounting block 16 is connected to an end of the air cylinder piston rod 2, the mounting plate 11 is connected to the mounting block 16 through the connecting plate 14, and the air cylinder body 1 is connected to the upper mounting base.

The frame mainly used fixes drive assembly and goes up locating component, mounting panel 11 mainly used supports and fixes drive assembly, mounting hole on mounting panel 11 mainly makes things convenient for being connected between drive assembly and the mounting panel 11, locating component and mounting panel 11 are connected to installation piece 16 mainly used, be connected through two connecting plates 14 between mounting panel 11 and the installation piece 16, connecting plate 14 has certain height, make and keep certain space between mounting panel 11 and the installation piece 16, be convenient for go up locating component's arrangement and installation, be connected cylinder body 1 and last mount pad, can realize the fixed of cylinder, thereby drive the frame and connect locating component and drive assembly in the frame and make reciprocating motion.

Example 3:

as a preferable technical solution of the present invention, on the basis of embodiment 2, the upper positioning component includes an upper shaft 901, an upper shaft metal holder 902, an upper shaft inner ring 903 and a steel ball 904, the bottom end of the mounting block 16 is connected with a guide block 17, an adjusting block 15 is further disposed between the guide block 17 and the mounting block 16, the adjusting block 15 is used for adjusting the position of the guide block 17 so as to adjust the center alignment of the upper positioning device and the lower positioning device, the upper shaft 901 is connected with the guide block 17 through an elastic member, the upper shaft metal holder 902 is slidably connected with the upper shaft 901, a spring is disposed between the upper shaft metal holder 902 and the upper shaft 901, the upper shaft inner ring 903 is rotatably connected to the upper shaft 901, the upper shaft inner ring 903 is located in the upper shaft metal holder 902, the steel ball 904 is disposed between the upper shaft metal holder 902 and the upper shaft inner ring 903, a placing hole 9021 for placing the steel ball 904 is disposed on the upper shaft metal holder 902, the placing hole 9021 is provided with a leakage hole 9022 which facilitates the contact of the steel ball 904 and the bearing outer ring 6.

An upper shaft 901 is used as a main carrier and a connecting piece of an upper positioning assembly and is used for connecting a guide block 17 and an upper shaft metal holder 902 and providing a mounting carrier for an upper shaft inner ring 903, one end of the upper shaft 901 is connected with the guide block 17 through an elastic piece, the elastic piece can enable the upper positioning assembly and the guide block 17 to have certain buffering, the elastic piece can adopt a form of a telescopic rod 19 and a buffer spring 18, as shown in fig. 10, in order to realize the positioning of the upper positioning assembly on a bearing outer ring 6, an upper shaft inner ring 903 is rotatably connected on the upper shaft 901, the other end of the upper shaft 901 is connected with the upper shaft metal holder 902, a steel ball 904 is arranged in the upper shaft 901 metal holder, the steel ball 904 is positioned between the upper shaft metal holder 902 and the upper shaft inner ring 903, a plurality of placing holes 9021 for placing the steel ball 904 are arranged in the upper shaft metal holder 902, and the placing steel ball 904 rolls in the upper shaft metal holder 902, the shape of the upper shaft metal holder 902 is "bowl", as shown in fig. 7, the placing holes 9021 are uniformly arranged on the side wall of the upper shaft metal holder 902 along the circumference, specifically, 6 placing holes 9021 may be uniformly arranged on the circumference of the upper shaft metal holder 902, and a leak 9022 facilitating the contact between the steel ball 904 and the bearing outer ring 6 is arranged on the placing holes 9021, that is, a circular hole formed after the placing holes 9021 and the outer wall of the upper shaft metal holder 902 are intersected is a leak 9022, an arc track matched with the steel ball 904 is arranged on one side of the upper shaft inner ring 903 close to the steel ball 904, the shape of the upper shaft inner ring 903 is as shown in fig. 8, a variable space exists between the upper shaft metal holder 902 and the upper shaft inner ring 903, so that the steel ball 904 can maintain a certain moving space, when the space becomes larger, the steel ball 904 can approach the rotation center of the upper shaft metal holder 902, so that the steel ball 904 can smoothly enter the bearing outer ring 6, when the space is reduced to the point that the steel ball 904 is just in contact with the arc track of the upper shaft inner ring 903 and the arc track of the bearing outer ring 6, the steel ball 904 realizes the positioning of the upper positioning assembly on the bearing outer ring 6, the upper shaft metal retainer 902 is in sliding connection with the upper shaft 901 in order to control the space between the upper shaft metal retainer 902 and the upper shaft inner ring 903, and a spring is arranged between the upper shaft metal retainer 902 and the upper shaft 901, so that the relative distance between the upper shaft metal retainer 901 and the upper shaft metal retainer 902 is the farthest under the condition that the upper shaft metal retainer 901 and the upper shaft metal retainer 902 are not subjected to external force, namely the space between the upper shaft metal retainer 902 and the upper shaft inner ring 903 is the largest.

The positioning assembly 9 comprises an upper positioning assembly and a lower positioning assembly, so as to realize accurate positioning of the bearing outer ring 6, the lower positioning assembly is arranged on the lower mounting seat 8, the lower positioning assembly comprises a lower shaft 908, a lower shaft metal retainer 905, a lower shaft inner ring 906 and steel balls 904, because the lower positioning assembly and the upper positioning assembly are arranged in a mirror image manner, the lower shaft 908, the lower shaft metal retainer 905 and the lower shaft inner ring 906 are arranged in a mirror image manner relative to the upper shaft 901, the upper shaft metal retainer 902 and the upper shaft inner ring 903, specifically, the lower shaft 908 is fixedly connected on the lower mounting seat 8, the lower shaft metal retainer 905 is in sliding connection with the lower shaft 908, a spring is arranged between the lower shaft metal retainer 905 and the lower shaft 908, the lower shaft inner ring 906 is rotationally connected on the lower shaft 908, the steel balls 904 are arranged between the lower shaft metal retainer 905 and the lower shaft inner ring 906, a placing hole 9021 for placing the steel balls 904 is arranged below the lower shaft metal retainer 905, a leakage hole 9022 which is convenient for the steel ball 904 to contact with the bearing outer ring 6 is formed in the lower opening of the placing hole 9021.

The diameter of the placing hole 9021 is larger than that of the steel ball 904, and the diameter of the leakage hole 9022 is smaller than that of the steel ball 904. Since the steel ball 904 needs to move a little toward the center of the metal holder 902 when entering the outer ring 6 to be detected, and needs to contact the circular arc orbit on the outer ring 6 to position the outer ring 6 after the steel ball 904 enters the outer ring 6, the steel ball 904 needs to move in the placing hole 9021 of the metal holder 902, so the diameter of the placing hole 9021 is set to be larger than that of the steel ball 904, but the diameter of the placing hole 9021 cannot be too large, when the steel ball 904 moves to the limit side of the placing hole 9021, the positioning component can enter the outer ring 6, the limit side of the placing hole 9021 is the side of the placing hole 9021 farthest from the inner wall of the outer ring 6 when the positioning component enters the outer ring 6, that is, the steel ball 904 moves to the side not affecting the positioning component to enter the outer ring 6, in order to realize the contact of the steel ball 904 and the circular arc orbit of the outer ring 6, a leakage hole 9022 is formed in the placing hole 9021, the leakage hole 9022 is a hole formed by intersection between the placing hole 9021 and the outer side face of the upper shaft metal retainer 902, and the diameter of the leakage hole 9022 is smaller than that of the steel ball 904, so that the steel ball 904 is prevented from sliding out of the upper shaft metal retainer 902 from the leakage hole 9022.

Example 4:

as a preferable aspect of the present invention, in embodiment 1, the upper shaft inner race 903 is rotatably connected to the upper shaft 901 through an angular contact bearing 907. Because the upper shaft inner ring 903 is rotationally connected to the upper shaft 901, when positioning, one side of the steel ball 904 is attached to the circular arc orbit in the bearing outer ring 6, and the other side is attached to the circular arc orbit of the upper shaft inner ring 903, as shown in fig. 6, when the bearing outer ring 6 rotates, due to friction, the steel ball 904 is driven to rotate, and friction between the steel ball 904 and the upper shaft inner ring 903 drives the upper shaft inner ring 903 to rotate, so that friction between the upper shaft inner ring 903 and the upper shaft 901 affects rotation of the upper shaft inner ring 903, if the friction between the upper shaft inner ring 903 and the upper shaft 901 is too large, relative sliding is generated between the steel ball 904 and the bearing outer ring 6, rather than a purely rolling motion relationship, which easily generates scratches on the circular arc orbit of the bearing outer ring 6, thereby affecting the quality of the bearing outer ring 6, and in order to avoid the above situation, the upper shaft inner ring 903 is rotationally connected to the upper shaft 901 through the angular contact bearing 907, specifically, the structure of the upper shaft inner ring 903 is as shown in fig. 8, a shaft shoulder is arranged on the inner wall of the upper shaft inner ring 903, angular contact bearings 907 are respectively arranged on two sides of the shaft shoulder, an outer ring of the angular contact bearings 907 is in interference fit with the inner wall of the upper shaft inner ring 903, and by arranging the angular contact bearings 907, the friction force between the upper shaft inner ring 903 and the upper shaft 901 is reduced, which is beneficial to the rotation of the bearing outer ring 6, and the damage of the circular arc track of the bearing outer ring 6 caused by excessive friction force is avoided.

The lower shaft inner ring 906 is also rotatably connected to the lower shaft 908 through an angular contact bearing 907, and the specific function and effect are the same as those of the upper shaft inner ring 903 rotatably connected to the upper shaft 901 through the angular contact bearing 907.

Example 5:

as a preferable technical solution of the present invention, on the basis of embodiment 1, a groove is provided at one end of the upper shaft 901 close to the upper shaft metal holder 902, two through holes whose center lines are located on the same horizontal line are provided on the sidewall of the groove, a boss is provided at one end of the upper shaft metal holder 902 close to the upper shaft 901, vertical "U" -shaped grooves are symmetrically provided on the circumference of the boss, a gasket having the same size as the cross-sectional area of the boss is fixed at the end of the boss, the upper shaft 901 and the upper shaft metal holder 902 are connected by a pin penetrating through the through holes and located in the "U" -shaped grooves, and a spring is provided between the gasket and the bottom of the groove.

The upper shaft 901 and the upper shaft metal holder 902 can be connected in a sliding manner in various ways, for example, a sliding rail and sliding groove matching manner or a cylinder connection manner is adopted, and here, in order to achieve the purpose of structure simplification, a boss and groove matching manner is adopted to achieve the sliding connection, namely, a groove is arranged at one end of the upper shaft 901 close to the upper shaft metal holder 902, a boss matched with the groove is arranged at one end of the upper shaft metal holder 902 close to the upper shaft 901, a spring is arranged in the groove, two ends of the spring are respectively contacted with the bottom of the groove and the boss, the boss is easy to slide out of the groove due to the adoption of the boss and groove manner, in order to prevent the above situation, vertical U-shaped grooves are symmetrically arranged on the circumference of the boss, the symmetric line of the two U-shaped grooves is the central line of the boss, and a gasket with the same size as the cross-sectional area of the boss is fixed at the tail end of the boss, the upper end of the U-shaped groove is sealed by the gasket to form a sealed groove, two through holes are formed in the side wall of the groove of the upper shaft 901, the positions of the through holes correspond to those of the U-shaped groove, then pins are inserted into the two through holes, one end of each pin is inserted into the U-shaped groove of the upper shaft metal holder 902, as shown in fig. 4, the pins are matched with the gasket, the boss of the upper shaft metal holder 902 cannot slide out of the groove of the upper shaft 901, and the gasket is fixed at the tail end of the boss, so that two ends of the spring are respectively contacted with the gasket and the bottom of the groove.

Because the reason that locating component and last locating component mirror image set up down, the one end that lower axle 908 is close to lower axle metal holder 905 also is provided with the recess, the lateral wall of recess is provided with two through-holes that the central line is located same water flat line down, be provided with the boss in the lower axle metal holder 905, the symmetry is provided with "U" type groove on the circumference of boss, the end of boss is fixed with the gasket the same with boss cross sectional area size, lower axle 908 and lower axle metal holder 905 are through passing the through-hole and being located the pin joint in "U" type groove, be provided with the spring between gasket and the recess bottom.

Example 6:

as shown in fig. 1-12, a detection device for wheel hub bearing outer ring 6, includes mount pad, lower mount pad 8 and frame, still includes last locating component and lower locating component that the mirror image set up, it sets up in the frame to go up locating component, the frame is connected with last mount pad and can relatively go up the mount pad and make reciprocating motion, locating component sets up under on mount pad 8 down, it is located same vertical line with locating component's central line down to go up locating component, it all is provided with a plurality ofly in locating component and the lower locating component and is used for fixing a position bearing outer ring 6 and can wind self centre of sphere free rotation's steel ball 904, it all is provided with detection module 7 that is used for detecting bearing outer ring 6 to go up locating component and locating component down, still be provided with in the frame and be used for driving bearing outer ring 6 pivoted drive assembly.

The frame is connected with last mount pad through the cylinder, the frame includes installation piece 16, connecting plate 14 and the mounting panel 11 that has the mounting hole, the cylinder includes cylinder body 1 and cylinder piston rod 2, the tip at cylinder piston rod 2 is connected to installation piece 16, mounting panel 11 is connected with installation piece 16 through connecting plate 14, cylinder body 1 is connected on last mount pad.

The upper positioning component comprises an upper shaft 901, an upper shaft metal retainer 902, an upper shaft inner ring 903 and a steel ball 904, the bottom end of the mounting block 16 is connected with a guide block 17, an adjusting block 15 is further arranged between the guide block 17 and the mounting block 16, the adjusting block 15 is used for adjusting the position of the guide block 17 so as to adjust the center alignment of the upper positioning device and the lower positioning device, the upper shaft 901 is connected with the guide block 17 through an elastic piece, the upper shaft metal retainer 902 is in sliding connection with the upper shaft 901, a spring is arranged between the upper shaft metal retainer 902 and the upper shaft 901, the upper shaft inner ring 903 is rotatably connected to the upper shaft 901, the upper shaft inner ring 903 is positioned in the upper shaft metal retainer 902, the steel ball 904 is arranged between the upper shaft metal retainer 902 and the upper shaft inner ring 903, the upper shaft metal retainer 902 is provided with a placing hole 9021 for placing the steel ball 904, the placing hole 9021 is provided with a leakage hole 9022 which facilitates the contact of the steel ball 904 and the bearing outer ring 6.

The upper shaft inner ring 903 is rotatably connected to the upper shaft 901 through an angular contact bearing 907. Because the upper shaft inner ring 903 is rotationally connected to the upper shaft 901, when positioning, one side of the steel ball 904 is attached to the circular arc orbit in the bearing outer ring 6, and the other side is attached to the circular arc orbit of the upper shaft inner ring 903, as shown in fig. 6, when the bearing outer ring 6 rotates, due to friction, the steel ball 904 is driven to rotate, and friction between the steel ball 904 and the upper shaft inner ring 903 drives the upper shaft inner ring 903 to rotate, so that friction between the upper shaft inner ring 903 and the upper shaft 901 affects rotation of the upper shaft inner ring 903, if the friction between the upper shaft inner ring 903 and the upper shaft 901 is too large, relative sliding is generated between the steel ball 904 and the bearing outer ring 6, rather than a purely rolling motion relationship, which easily generates scratches on the circular arc orbit of the bearing outer ring 6, thereby affecting the quality of the bearing outer ring 6, and in order to avoid the above situation, the upper shaft inner ring 903 is rotationally connected to the upper shaft 901 through the angular contact bearing 907, specifically, the structure of the upper shaft inner ring 903 is as shown in fig. 8, a shaft shoulder is arranged on the inner wall of the upper shaft inner ring 903, angular contact bearings 907 are respectively arranged on two sides of the shaft shoulder, an outer ring of the angular contact bearings 907 is in interference fit with the inner wall of the upper shaft inner ring 903, and by arranging the angular contact bearings 907, the friction force between the upper shaft inner ring 903 and the upper shaft 901 is reduced, which is beneficial to the rotation of the bearing outer ring 6, and the damage of the circular arc track of the bearing outer ring 6 caused by excessive friction force is avoided.

The spring type upper shaft structure is characterized in that a groove is formed in one end, close to the upper shaft metal holder 902, of the upper shaft 901, two through holes are formed in the side wall of the groove, the center lines of the two through holes are located on the same horizontal line, a boss is arranged in the upper shaft metal holder 902, U-shaped grooves are symmetrically formed in the circumference of the boss, a gasket with the same size as the cross section area of the boss is fixed at the tail end of the boss, the upper shaft 901 is connected with the upper shaft metal holder 902 through a pin penetrating through the through holes and located in the U-shaped grooves, and a spring is arranged between the gasket and the bottom of the groove.

The upper shaft 901 and the upper shaft metal holder 902 can be connected in a sliding manner in various ways, for example, a sliding rail and sliding groove matching manner or a cylinder connection manner is adopted, and here, in order to achieve the purpose of structure simplification, the sliding connection is achieved in a boss and groove matching manner, namely, a groove is arranged at one end of the upper shaft 901 close to the upper shaft metal holder 902, a boss matched with the groove is arranged at one end of the upper shaft metal holder 902 close to the upper shaft 901, a spring is arranged in the groove, two ends of the spring are respectively contacted with the bottom of the groove and the boss, the boss is easy to slide out of the groove due to the adoption of the boss and groove manner, in order to prevent the above situation, vertical U-shaped grooves are symmetrically arranged on the circumference of the boss, the symmetric line of the two U-shaped grooves is the central line of the boss, and a gasket with the same size as the cross-sectional area of the boss is fixed at the tail end of the boss, the upper end of the U-shaped groove is sealed by the gasket to form a sealed groove, two through holes are formed in the side wall of the groove of the upper shaft 901, the positions of the through holes correspond to those of the U-shaped groove, then pins are inserted into the two through holes, one end of each pin is inserted into the U-shaped groove of the upper shaft metal holder 902, as shown in fig. 4, the pins are matched with the gasket, the boss of the upper shaft metal holder 902 cannot slide out of the groove of the upper shaft 901, and the gasket is fixed at the tail end of the boss, so that two ends of the spring are respectively contacted with the gasket and the bottom of the groove.

Drive assembly includes driving motor 3, round pin axle 5 and the annular slip axle sleeve 13 of circle, driving motor 3 sets up on mounting panel 11, slip axle sleeve 13 rotates to be connected in the mounting hole of mounting panel 11, driving motor 3 is connected with the transmission of slip axle sleeve 13, the axis of bearing inner race 6 and the axis collineation of slip axle sleeve 13 work as when the frame is towards the mount pad motion down, the frame drives and goes up locating component and runs through the slip axle sleeve sets up round pin axle 5 on the slip axle sleeve 13 drives bearing inner race 6 and rotates.

The driving assembly mainly provides driving force for the detected bearing outer ring 6 and drives the bearing outer ring 6 to rotate, the driving motor 3 is used for providing driving force and fixing the driving force on the mounting plate 11, the sliding shaft sleeve 13 is used for driving the bearing outer ring 6 to rotate, therefore, the sliding shaft sleeve 13 is rotatably connected on the mounting plate 11, for convenience of installation, a circular mounting hole is arranged on the mounting plate 11, the size of the mounting hole is the same as that of the sliding shaft sleeve 13, the connection tightness is ensured, the mounting hole is in clearance fit with the sliding shaft sleeve 13, the rotation of the sliding shaft sleeve 13 is ensured, in order to prevent the sliding shaft sleeve 13 from falling after being installed in the mounting hole, a circular end cover 12 can be installed at the upper end of the sliding shaft sleeve 13, as shown in figures 2 and 3, the circular end cover 12 is fixedly connected with the sliding shaft sleeve 13, the diameter of the circular end cover 12 is larger than the inner diameter of the mounting hole, and the sliding shaft sleeve 13 is clamped on the mounting plate 11, thereby preventing the sliding sleeve 13 from falling off the mounting plate 11, since the bearing outer ring 6 is usually rotated by itself to perform an all-directional inspection, therefore, in order to realize that the sliding shaft sleeve 13 drives the bearing outer ring 6 to rotate and keeps the bearing outer ring 6 to rotate, the bearing outer ring 6 is fixedly connected with the sliding shaft sleeve 13, the axis of the bearing outer ring 6 is kept to be collinear with the axis of the sliding shaft sleeve 13, since the bearing outer ring 6 needs to be taken away after the detection is finished so as to detect the next bearing outer ring 6, therefore, the bearing outer ring 6 and the sliding shaft sleeve 13 can not be completely fixed, and can be disassembled and separated in real time, in order to meet the requirements, the bearing outer ring 6 and the sliding shaft sleeve 13 are inserted through the pin shaft 5, the bearing outer ring 6 and the sliding shaft sleeve 13 can be integrated when the pin shaft 5 is inserted, and the bearing outer ring 6 and the sliding shaft sleeve 13 can be separated when the pin shaft 5 is taken down; the driving motor 3 is in transmission connection with the sliding shaft sleeve 13, so that the driving force of the driving motor 3 is conveniently transmitted to the sliding shaft sleeve 13, and the rotation of the bearing outer ring 6 is realized.

The driving shaft of the driving motor 3 is provided with a driving gear 4, the bottom of the sliding shaft sleeve 13 is fixedly connected with a driven gear 10, and the driving gear 4 is meshed with the driven gear 10. The driving motor 3 and the sliding shaft sleeve 13 can be driven through various transmission modes, such as belt transmission, chain transmission or gear transmission, etc., the device is convenient to arrange and install by adopting gear transmission, and the gear transmission has the advantages of high transmission efficiency, accurate transmission ratio, long service life, large transmission power, high transmission precision, etc., concretely, the driving gear 4 is arranged on the driving shaft of the driving motor 3, the bottom of the sliding shaft sleeve 13 is fixedly connected with the driven gear 10, the driven gear 10 is connected with the sliding shaft sleeve 13 by adopting a screw, because the sliding shaft sleeve 13 is connected with the bearing outer ring 6 by the pin shaft 5, the driven gear 10 is arranged between the sliding shaft sleeve 13 and the bearing outer ring 6, and the driven gear 10 is provided with a hole for the pin shaft 5 to pass through.

The positioning assembly is provided with two detection assemblies 7, and the two detection assemblies 7 are symmetrically arranged by taking the axis of the positioning assembly as a central line; two detection assemblies 7 are also arranged on the lower positioning assembly, and the two detection assemblies 7 are symmetrically arranged by taking the axis of the lower positioning assembly as a central line. Go up the symmetry on locating component and the lower locating component and be provided with two determine module 7 and all set up with its axis symmetry, two determine module 7 of upper and lower locating component are 180 settings promptly, when the bearing outer lane rotates and detects, only need rotate 180 and can realize the all-round detection of bearing outer lane.

The detection assembly 7 comprises a detection probe mounting piece 701 and a U-shaped magnetic pole 702, the U-shaped magnetic pole 702 is sleeved at one end of the detection probe mounting piece 701 where the detection probe is located, and the other end of the detection probe mounting piece 701 is fixed on the upper shaft 901. U type magnetic pole 702 is mainly used for carrying out local magnetization with bearing inner race 6, and the magnetic induction line of U type magnetic pole 702 is as shown in fig. 9, contains the magnetic leakage test probe in the test probe mounting part 701, and the magnetic leakage test probe detects the magnetic field that is produced by magnetized bearing inner race 6 to judge whether there is a defect in bearing inner race 6, and the testing process adopts the magnetic leakage detection technique, and magnetic leakage detection is very important nondestructive test method, and the application is very extensive, also is very mature prior art, does not describe here in any detail.

The working principle is as follows:

when the bearing outer ring positioning device works initially, the lower positioning assembly and the detection assembly 7 on the lower positioning assembly are fixed on the lower mounting seat 8, the upper positioning assembly is fixed on the upper mounting seat through the rack and the air cylinder, the bearing outer ring 6 to be measured is placed on the lower positioning assembly, the air cylinder works, the upper positioning assembly slowly enters the bearing outer ring 6 to be measured, and when the bearing outer ring 6 is placed, a round hole outside the bearing outer ring 6 needs to be aligned with the pin shaft 5 on the driving assembly.

And (3) positioning: the spring in the groove of the lower shaft 908 is in the longest state under the action of the gravity of the lower shaft metal holder 905, at the moment, the lower shaft metal holder 905 is at the highest position relative to the lower shaft 908, and the diameter of the placing hole 9021 is larger than that of the steel ball 904, so that the steel ball 904 on the lower shaft metal holder 905 is positioned at the bottommost part of the placing hole 9021 under the action of the self gravity, and the part of the steel ball 904 exposed out of the leakage hole 9022 is less, so that the steel ball 904 of the lower positioning assembly can easily enter the circular arc track of the outer ring 6 of the bearing to be measured.

The upper positioning component is driven by a random frame to move downwards in a vertical plane by a cylinder, at the moment, the driving motor 3 stops, an elastic part between the upper shaft 901 and the guide block 17 is in a loose state, a spring in a groove of the upper shaft 901 is in a longest state only under the action of the gravity of the upper shaft metal retainer 902, at the moment, the upper shaft metal retainer 902 is at the lowest position relative to the upper shaft 901, and the diameter of the placing hole 9021 is larger than that of the steel ball 904, so that the steel ball 904 on the upper shaft metal retainer 902 can move in the placing hole 9021, when the upper positioning component enters the tested bearing outer ring 6, the steel ball 904 can freely move in the placing hole 9021 and cannot generate resistance on the upper positioning component entering the bearing outer ring 6, and therefore the steel ball 904 of the upper positioning component can also easily enter the circular arc track of the tested bearing outer ring 6; in the process, the elastic piece is always in the longest state, and the spring in the upper shaft groove is also in the longest state.

When the cylinder drives the upper positioning assembly to move downwards continuously, due to the limitation of the internal structure of the detected bearing outer ring 6 on the upper shaft metal retainer 902, the upper shaft metal retainer 902 cannot move downwards relative to the bearing outer ring 6 continuously, and due to the fact that a spring is arranged between the upper shaft metal retainer 902 and the upper shaft 901, the upper shaft metal retainer 902 moves upwards relative to the upper shaft 901 at the moment, the spring is compressed until the steel ball 904 in the placing hole 9021 is in contact with the arc track on the upper shaft inner ring 903, and at the moment, the steel ball 904 is in good contact with the arc track on the upper part of the bearing outer ring 6 and the arc track on the upper shaft inner ring 903 exactly, so that the upper positioning assembly positions the bearing outer ring 6; because lower locating component and last locating component are the mirror image setting, consequently the locating process of lower locating component to bearing inner race 6 is the same with the locating process of last locating component to bearing inner race 6, does not describe herein any more, after steel ball 904 in upper and lower locating component all contacted with the circular arc track of surveyed outer lane completely, the cylinder stop motion, just so accomplished upper and lower locating component to the location of bearing inner race 6, the locating process finishes.

Then the driving motor 3 is started to work, the driving shaft on the driving motor 3 transmits power to the driving gear 4, the driven gear 10 is driven to rotate in the horizontal plane through the meshing of the driving gear 4 and the driven gear 10, the round end cover 12 and the sliding shaft sleeve 13 are connected together, so that the pin shaft 5 penetrating through the round end cover 12, the sliding shaft sleeve 13 and the driven gear 10 is driven to rotate in the same horizontal plane, the pin shaft 5 penetrates through a round hole outside the tested bearing outer ring 6 to connect the bearing outer ring 6, the driven gear 10, the round end cover 12 and the sliding shaft sleeve 13 together, so that the tested bearing outer ring 6 also rotates in the same horizontal plane, the tested outer ring is in rolling contact with the steel ball 904, the steel ball 904 is in rolling contact with the upper shaft inner ring 903 and the lower shaft inner ring 906, the upper shaft inner ring 903 and the lower shaft inner ring 906 are respectively matched with the upper shaft 901 and the lower shaft 908 through an angular contact bearing 907, the friction force is small when the bearing outer ring 6 rotates, the friction loss is small, and the problem that the arc track surface of the bearing outer ring 6 is damaged due to the fact that the friction force of the arc track of the steel ball 904 and the tested bearing outer ring 6 is too large is avoided.

Because the detecting probe mounting part 701 is respectively fixed on the side grooves on the outer surfaces of the upper shaft 908 and the lower shaft 908, the detecting probe part is hollowed through the inside of the mounting part and is installed at the correct position, the schematic diagram of the upper shaft 901 is shown in fig. 12, the connecting between the detecting probe mounting part 701 and the upper shaft 908 and the lower shaft 908 is shown in fig. 5, a permanent magnetic local magnetization method is adopted, when in detection, the outer ring 6 of the detected bearing is locally magnetized by the U-shaped magnetic pole 702, a circumferential magnetic field is formed in the circular arc track area detected by the detecting probe, two detecting probes are fixed on the two sides of the upper metal retainer and the lower metal retainer, each detecting probe detects a section of the arc surface of the circular arc track, thereby realizing the full-coverage leakage detection of the arc track surface of the outer ring 6 of the bearing, the detecting probes are not moved in the detecting process, the outer ring 6 of the detected bearing rotates, after the outer ring 6 of the detected bearing rotates for half a circle, the detecting probes comprehensively detect the outer ring 6 of the detected bearing, and the detection process is finished, and the driving motor 3 is stopped.

Then the cylinder starts to work, so that the piston rod starts to move, the rack and the upper shaft 901 detection assembly 7 are driven to move upwards in a vertical plane, at the moment, the compressed spring in the groove of the upper shaft 901 starts to recover the original length, the upper shaft metal retainer 902 and the upper shaft 901 are driven to move relatively, so that the space between the upper shaft metal retainer 902 and the upper shaft inner ring 903 is enlarged, the steel ball 904 on the upper shaft metal retainer 902 can move freely in the placing hole 9021, the steel ball 904 is prevented from being clamped in the circular arc track of the bearing outer ring 6 when the upper positioning assembly withdraws from the bearing outer ring 6, therefore, the upper positioning assembly can easily withdraw from the circular arc track of the tested bearing outer ring 6, meanwhile, the lower positioning assembly withdraws from the tested bearing outer ring 6 due to the same relative movement relationship, and the whole process is finished; and when the next bearing outer ring 6 is detected, repeating the steps.

The invention is not limited to the above alternative embodiments, and any other various forms of products can be obtained by anyone in the light of the present invention, but any changes in shape or structure thereof, which fall within the scope of the present invention as defined in the claims, fall within the scope of the present invention.

Claims

1. The utility model provides a device for detecting wheel hub bearing inner race, includes mount pad, lower mount pad (8) and frame, its characterized in that: the bearing outer ring positioning device is characterized by further comprising an upper positioning assembly and a lower positioning assembly which are arranged in a mirror image mode, wherein the upper positioning assembly is arranged on a rack, the rack is connected with an upper mounting seat and can reciprocate relative to the upper mounting seat, the lower positioning assembly is arranged on a lower mounting seat (8), the central lines of the upper positioning assembly and the lower positioning assembly are located on the same vertical line, a plurality of steel balls (904) which are used for positioning a bearing outer ring (6) and can freely rotate around the sphere center of the upper positioning assembly and the lower positioning assembly are arranged in the upper positioning assembly and the lower positioning assembly, a detection assembly (7) used for detecting the bearing outer ring (6) is arranged on the upper positioning assembly and the lower positioning assembly, a driving assembly used for driving the bearing outer ring (6) to rotate is further arranged on the rack, the upper positioning assembly comprises an upper shaft (901), an upper shaft metal retainer (902), an upper shaft inner ring (903) and a steel ball (904), the upper shaft metal retainer (902) is in sliding connection with an upper shaft (901), the upper shaft inner ring (903) is rotationally connected to the upper shaft (901) through an angular contact bearing (907), and the steel ball (904) is arranged in the upper shaft metal retainer (902).

2. The device for detecting the outer ring of the hub bearing according to claim 1, wherein: the frame passes through the cylinder and is connected with last mount pad, the frame includes installation piece (16), connecting plate (14) and mounting panel (11) that have the mounting hole, the cylinder includes cylinder body (1) and cylinder piston rod (2), the tip at cylinder piston rod (2) is connected in installation piece (16), mounting panel (11) are connected with installation piece (16) through connecting plate (14), cylinder body (1) is connected on last mount pad.

3. The apparatus of claim 2, wherein the apparatus further comprises: the bottom end of the mounting block (16) is connected with a guide block (17), the upper shaft (901) is connected with the guide block (17) through an elastic piece, and a spring is arranged between the upper shaft metal retainer (902) and the upper shaft (901); the upper shaft inner ring (903) is located in the upper shaft metal retainer (902), the steel ball (904) is arranged between the upper shaft metal retainer (902) and the upper shaft inner ring (903), a placing hole (9021) for placing the steel ball (904) is formed in the upper shaft metal retainer (902), and a leakage hole (9022) which is convenient for the steel ball (904) to contact with the bearing outer ring (6) is formed in the placing hole (9021).

4. The apparatus of claim 3, wherein the apparatus further comprises: the novel bearing is characterized in that a groove is formed in one end, close to an upper shaft metal retainer (902), of the upper shaft (901), two through holes with center lines located on the same horizontal line are formed in the side wall of the groove, a boss is arranged at one end, close to the upper shaft (901), in the upper shaft metal retainer (902), vertical U-shaped grooves are symmetrically formed in the circumference of the boss, a gasket with the same size as the cross section area of the boss is fixed at the tail end of the boss, and the upper shaft (901) is connected with the upper shaft metal retainer (902) through a pin penetrating through the through holes and located in the U-shaped grooves.

5. The device for detecting the outer ring of the hub bearing according to any one of claims 3 or 4, wherein: the diameter of the placing hole (9021) is larger than that of the steel ball (904), and the diameter of the leakage hole (9022) is smaller than that of the steel ball (904).

6. The apparatus of claim 2, wherein the apparatus further comprises: drive assembly includes driving motor (3), round pin axle (5) and the annular slip axle sleeve (13) of circle, driving motor (3) set up on mounting panel (11), slip axle sleeve (13) rotate to be connected in the mounting hole of mounting panel (11), driving motor (3) are connected with slip axle sleeve (13) transmission, the axis of bearing inner race (6) and the axis collineation of slip axle sleeve (13), work as when the frame is towards lower mount pad motion, locating component runs through in the frame drives slip axle sleeve (13), set up round pin axle (5) on slip axle sleeve (13) drive bearing inner race (6) and rotate.

7. The apparatus of claim 6, wherein the apparatus further comprises: the driving shaft of the driving motor (3) is provided with a driving gear (4), the bottom of the sliding shaft sleeve (13) is fixedly connected with a driven gear (10), and the driving gear (4) is meshed with the driven gear (10).

8. The device for detecting the outer ring of the hub bearing according to any one of claims 1 to 4, wherein: the upper positioning assembly is provided with two detection assemblies (7), and the axes of the positioning assemblies above the two detection assemblies (7) are symmetrically arranged by taking the central line as the central line; the lower positioning component is also provided with two detection components (7), and the axes of the lower positioning components of the two detection components (7) are symmetrically arranged as a central line.

9. The apparatus of claim 8, wherein the apparatus further comprises: the detection assembly (7) arranged on the upper positioning assembly comprises a detection probe mounting piece (701) and a U-shaped magnetic pole (702), the U-shaped magnetic pole (702) is sleeved at one end of the detection probe mounting piece (701) where the detection probe is located, and the other end of the detection probe mounting piece (701) is fixed on the upper shaft (901).