CN115350938B

CN115350938B - Automatic steel ball diameter detection device for electric vehicle hub and control method

Info

Publication number: CN115350938B
Application number: CN202211298916.0A
Authority: CN
Inventors: 李纪响; 于庆垒; 刘春霞
Original assignee: Jining Hengkuo Machinery Manufacturing Co ltd
Current assignee: Jining Hengkuo Machinery Manufacturing Co ltd
Priority date: 2022-10-24
Filing date: 2022-10-24
Publication date: 2023-02-07
Anticipated expiration: 2042-10-24
Also published as: CN115350938A

Abstract

The invention relates to the technical field of electric vehicle part detection, in particular to an automatic steel ball diameter detection device for an electric vehicle hub and a control method. The servo motor drives the rotating disc to rotate anticlockwise to drive the steel balls to rotate, the moving angular speed of the steel balls is half of that of the rotating disc, the steel balls roll between a rolling groove and a rolling surface of the rotating disc, the rolling surface is supported by the diameter in the vertical direction, the top surface of the lifting disc pushes up a measuring contact of the digital dial indicator, and diameter data are measured by the digital dial indicator and collected and stored by an upper computer; the steel balls are caught up by the blanking hole of the rotating disc, fall to the bottom of the rolling groove of the sorting disc, continue to roll and rotate along the rolling groove of the sorting disc, fall through the blanking hole of the sorting disc, pass through the first proximity sensor, and are electrified if the steel balls are qualified. The automatic feeding, detecting, judging and selecting device has the advantages of automatic feeding, detecting, judging and selecting, quick and accurate detecting, multi-directional diameter detecting, more detection data, automatic dirt cleaning, labor saving and reduction of the labor intensity of workers.

Description

Automatic steel ball diameter detection device for electric vehicle hub and control method

Technical Field

The invention relates to the technical field of electric vehicle part detection, in particular to an automatic steel ball diameter detection device for an electric vehicle hub and a control method.

Background

This company purchases a large amount of steel balls every year, installs in the annular space that electric motor car wheel hub nest and shaft enclose, and a plurality of steel balls closely arrange along annular space, make become rolling friction between wheel hub and the shaft. The diameter reference size of the steel ball is 5 mm, and the tolerance requirement is not more than the range of [ -0.05, +0.05] mm.

Because the quantity of the steel balls is too much, the diameter of the steel balls is not always detected completely, but part of the steel balls is selected for random inspection, for example, 50 steel balls are randomly drawn out from a packaging box containing 1000 steel balls, the steel balls are manually measured by using a vernier caliper, if the measured diameter is completely qualified, all the steel balls in the packaging box are considered to be qualified, even if the steel balls are completely qualified through the selection inspection, individual unqualified steel balls are mixed in the packaging box, and the unqualified steel balls flow into a production line, so that the final quality of the electric vehicle is influenced. If all the tests are carried out, a large amount of manpower and material resources are consumed. The diameter data measured by a vernier caliper is not much, the three diameters are measured by switching directions, and other unqualified diameters are easily overlooked.

The steel balls roll when in work, only one diameter is supported between the inner surface of the hub and the outer surface of the wheel shaft at a certain moment of rolling, if unqualified steel balls are installed on the electric vehicle, the diameter of the steel ball instantaneously borne by the unqualified steel balls is not equal to the diameter of the adjacent qualified steel balls, the load shared by the unqualified steel balls is not the same, and the service life of bearing the load is short; although the service life is long when the bearing load is small, the bearing load is not always born due to the small diameter, so all steel balls are always completely renewed when the steel balls are replaced. All the steel balls on the circumference need to be replaced as long as one steel ball is damaged. In a word, the service life of the whole set of steel balls is short when unqualified steel balls are mixed.

The steel balls bearing larger loads have larger pressure on the wheel hub and the wheel shaft, the pressure of adjacent steel balls on the wheel hub and the wheel shaft is smaller, the stress of the wheel hub and the wheel shaft is uneven, a lubricating oil film on the surface of a position subjected to larger stress is easily damaged, the contact stress of the metal surface is overlarge, the surface damage is accelerated, the service life of the wheel hub or the wheel shaft is shortened, and potential safety hazards are buried for transportation.

The quality inspection process of the steel ball manufacturer is similar to the process described above, the process is finished manually, the appearance quality is observed by human eyes, the diameter measurement is only partially selected and inspected, and a better technology capable of completely and rapidly detecting is not available, so that unqualified products are difficult to realize from the source.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides an automatic steel ball diameter detection device for an electric vehicle hub and a control method; the automatic feeding, detecting, judging and selecting device has the advantages of automatic feeding, detecting, judging and selecting, quick and accurate detecting, multi-directional diameter detecting, more detection data, automatic dirt cleaning, labor saving and reduction of the labor intensity of workers.

In order to achieve the purpose, the invention provides the following technical scheme:

according to the technical scheme, the automatic steel ball diameter detection device for the hub of the electric vehicle comprises a rack and a measuring assembly; the measuring assembly comprises a digital dial indicator, an upper computer, a sliding block, a linear guide rail, a lifting disc, a servo motor and a rotating disc;

the rotary disc is connected with the rack through a rotary pair, the shell of the servo motor is fixedly connected with the rack, the output shaft of the servo motor is fixedly connected with the rotary disc, the servo motor drives the rotary disc to rotate towards the anticlockwise direction when viewed from top to bottom, and the servo motor is positioned below the rotary disc; the rotary disc is provided with a rotary disc upper surface, the rotary disc upper surface is a plane which is horizontally upward, an annular rotary disc rolling groove is arranged on the rotary disc upper surface, and an annular axis of the rotary disc rolling groove is superposed with a rotary axis of the rotary disc; a through rotary disc blanking hole is arranged at the bottom of the rotary disc rolling groove; the width of the cross section of the rolling groove of the rotating disc is 1.1 to 1.5 times of the diameter of the steel ball, the depth of the cross section of the rolling groove of the rotating disc is 0.5 to 0.7 times of the diameter of the steel ball, the steel ball freely rolls in the rolling groove of the rotating disc along the circumferential direction, and the upper part of the rolling groove of the rotating disc is exposed out of the upper surface of the rotating disc;

the lifting disc is provided with a rolling surface which is a downward horizontal surface; the lifting disc is also provided with a lifting disc top surface which is an upward horizontal surface; the linear guide rail is fixedly connected with the lifting disc; the sliding block is fixedly connected with the rack; the linear guide rail and the sliding block are matched to form a precise linear guide rail pair, and the lifting disc slides along the vertical direction; the rolling surface and the bottom of the rolling groove of the rotating disc are always kept parallel; the rolling surface is positioned right above the rolling groove of the rotating disc; when the lifting disc is positioned at the lowest end of the stroke, the vertical distance between the upper surface of the rotating disc and the rolling surface is 0.15 to 0.25 times of the diameter of the steel ball, and the upper surface of the rotating disc and the rolling surface are never in contact; the lifting disc is also provided with a lifting disc feeding surface and a lifting disc blanking hole, the lifting disc feeding surface is horizontally upward, the lifting disc blanking hole is through up and down, and the upper opening and the lower opening of the lifting disc blanking hole are respectively arranged on the lifting disc feeding surface and the rolling surface; the lower opening of the blanking hole of the lifting disc is always positioned right above the rolling groove of the rotating disc, and no matter the rolling groove of the rotating disc rotates to any angle;

the gauge body of the digital dial gauge is fixedly connected with the rack, and a measuring contact of the digital dial gauge vertically touches the top surface of the lifting disc downwards; the upper computer is electrically connected with the digital dial indicator and acquires the size data of the vertical displacement of the lifting disc.

The technical scheme also comprises a feeder; the feeder comprises a hopper, a feeding channel block, a material pushing pore plate, a material pushing cylinder and a second proximity sensor; the feeding channel block is fixedly connected with the rack; a horizontal feeding channel is arranged in the feeding channel block, and a first end of the feeding channel is provided with a material pushing plate through hole; an upward through feeding channel inlet is formed in the upper wall of the feeding channel, a downward through feeding channel outlet is formed in the lower wall of the feeding channel, and the feeding channel inlet and the feeding channel outlet are staggered and not aligned; the second proximity sensor is arranged on the lower wall of the feeding channel and below the inlet of the feeding channel; the material pushing pore plate is provided with a material pushing pore which is through up and down; the material pushing cylinder comprises a material pushing cylinder body and a material pushing cylinder piston rod; the pushing cylinder body is fixedly connected with the rack, and a piston rod of the pushing cylinder is fixedly connected with the pushing pore plate; the hopper is fixedly connected with the rack, the hopper is funnel-shaped, the material falling hole of the hopper is positioned right above the inlet of the feeding channel, and the size of the material falling hole of the hopper and the size of the inlet of the feeding channel are only enough for one steel ball to pass through at a time. The pushing cylinder drives the pushing pore plate to reciprocate in the feeding channel, and the two ends of the pushing pore plate at the stroke respectively face upwards to align with the inlet of the feeding channel and face downwards to align with the outlet of the feeding channel; the outlet of the feeding channel is downwards aligned with the upper opening of the blanking hole of the lifting disc. Generally, the feeding channel block and the material pushing pore plate are both made of non-metal materials, the second proximity sensor is a sensor capable of detecting metal, and the steel balls can detect and generate electric signals when approaching.

The technical scheme also comprises a material picking component; the sorting assembly comprises a sorting trough disc, a first proximity sensor and an electromagnet; the material-picking groove disc is fixedly connected with the rack; the sorting groove disc is provided with an annular sorting disc rolling groove, and the axis of the sorting disc rolling groove is superposed with the axis of rotation of the rotating disc; the depth of the rolling groove of the material picking disc is less than half of the diameter of the steel ball; a material picking disc material falling hole which is through up and down is arranged in the groove of the material picking disc rolling groove; the electromagnet is fixedly connected with the rack; the electromagnet is provided with a guide groove, the cross section of the guide groove is semicircular, the guide groove is divided into two sections which are smoothly connected, one section of the guide groove is close to the upper part, the other section of the guide groove is close to the lower part, the guide groove is arranged right below the blanking hole of the sorting tray, and the axial lead of the guide groove is superposed with the axial lead of the blanking hole of the sorting tray; the first proximity sensor is arranged on the inner wall of a blanking hole of the sorting tray through a mounting hole, and is used for detecting whether steel balls pass through the hole or not; for steel balls which are detected to be unqualified, the electromagnet is not electrified, magnetic attraction is not generated, and the steel balls vertically fall along the guide vertical groove through the material-picking disc material-falling hole; and for the steel balls qualified in detection, the electromagnet is electrified to generate magnetic attraction, the steel balls are attracted to the guide vertical groove, roll downwards along the guide vertical groove under the action of gravity, then turn to the guide inclined groove to roll downwards in an inclined mode, and finally the falling path deviates from the original vertical direction. The sorting tray is made of non-metal materials, and the first proximity sensor is a contact sensor used for detecting metal, so that the first proximity sensor is not interfered to detect steel balls in the blanking hole of the sorting tray.

The position of the lifting disc blanking hole relative to the rotating axis of the rotating disc is defined as the rear, and the position of the sorting disc blanking hole relative to the rotating axis of the rotating disc is defined as the front; the rotary disc blanking hole is aligned with the lifting disc blanking hole at the rear, rotates 180 degrees and then is rotated to the front of the rotary shaft line of the rotary disc and is aligned with the sorting disc blanking hole at the upper part and the lower part, namely the sorting disc blanking hole is positioned in front of the rotary shaft line of the rotary disc. The tangential direction of the counterclockwise rotation of the blanking hole of the rotary plate at the rear is defined as the right direction, and the direction opposite to the right direction is defined as the left direction.

The technical scheme also comprises an unqualified product sieve and a qualified product sieve; the upper opening of the unqualified product sieve is arranged right below the guide vertical groove; the upper opening of the qualified product sieve is arranged right below the lower end of the guide inclined groove. Detect unqualified steel ball above, the electro-magnet does not switch on, does not produce magnetic attraction, through the vertical drop of the vertical groove of the material tray blanking hole of choosing along the direction, falls in the defective products sieve. The above qualified steel balls for detection are electrified to generate magnetic attraction, the steel balls are attracted to the guide vertical grooves, roll downwards along the guide vertical grooves under the action of gravity, then turn to the guide inclined grooves to roll towards the inclined lower sides, and finally fall off the path deviating from the original vertical direction and just fall into the qualified product sieve. Therefore, the purpose of sorting qualified products and unqualified products is achieved.

The sensor comprises a first proximity sensor and a second proximity sensor, and an SJS0308N type ultra-small cylindrical proximity switch produced by Shenzhen Shite Eng science and technology Limited company can quickly generate an electric signal for a metal object which is close to the metal object, namely a steel ball.

The technical proposal also comprises a detergent pusher; the detergent pusher comprises a detergent cylinder, a corrugated pipe, a first check valve, a second check valve, a detergent tank and a detergent pipe; the corrugated pipe is made of elastic engineering plastics, two ends of the corrugated pipe are closed, and a cavity is formed in the corrugated pipe; the cylinder body of the detergent cylinder is fixedly connected with the rack, the second end of the corrugated pipe is fixedly connected with the rack, and the piston rod of the detergent cylinder is fixedly connected with the first end of the corrugated pipe; the height of the bottom of the detergent tank is higher than that of the corrugated pipe; the first end of the detergent pipe is communicated with the detergent tank, the second end of the detergent pipe is communicated with the inner cavity of the corrugated pipe, and the first one-way valve is arranged on the detergent pipe; the first end of the second one-way valve is communicated with the inner cavity of the corrugated pipe; the metal cleaning agent is stored in the detergent tank; the lifting disc is also provided with a lifting disc liquid dropping hole which is through up and down, the upper opening of the lifting disc liquid dropping hole is arranged on the feeding surface of the lifting disc, the second end of the second one-way valve is arranged right above the lifting disc liquid dropping hole, the lower opening of the lifting disc liquid dropping hole is arranged on the rolling surface, and the lower opening of the lifting disc liquid dropping hole is not arranged right above the rolling groove of the rotating disc, so that the problem that the steel ball is just embedded in the lower opening of the lifting disc liquid dropping hole during rolling to cause the measurement of wrong size is avoided; the upper surface of the rotating disc is also provided with a liquid storage tank, the lower opening of the dropping hole of the lifting disc is arranged above the liquid storage tank, and the liquid storage tank is communicated with the rolling tank of the rotating disc through a communicating tank; the height of the bottom surface of the communicating groove is higher than that of the bottom surface of the rolling groove of the rotating disc, so that the steel balls are prevented from rolling into the communicating groove by mistake. The metal cleaning agent cleans and erodes the rotating disk rolling groove, and prevents dirt in the rotating disk rolling groove from influencing the detection result.

The lifting disc is further provided with a rubber brush which is fixedly arranged on a rolling surface, the rubber brush is embedded into the rotating disc rolling groove and can be used for brushing the rotating disc rolling groove, so that the metal cleaning agent is promoted to flow in the rotating disc rolling groove, and dirt is taken away quickly.

The rolling surface is also provided with an inclined surface, the inclined surface is obtained by removing materials on the rolling surface along the inclined direction, and the lower opening of the blanking hole of the lifting disc is arranged on the inclined surface; the thickness of the left side of the lifting disc positioned on the blanking hole of the lifting disc is thinner than that of the right side of the lifting disc positioned on the position with the inclined plane, and the right side edge of the inclined plane is smoothly connected with the rolling surface. Under the condition of an inclined plane, the steel ball falls from the lifting disc blanking hole, enters the lower part of the rolling surface through the inclined plane, and rolls along with the rotating disc rotating anticlockwise; preventing such a situation from occurring: the lower opening of the blanking hole of the lifting disc limits the steel ball not to move anticlockwise, and the steel ball can only roll along with the rolling groove of the rotating disc in situ.

The technical proposal also comprises a detergent receiving groove which is positioned right below the sorting groove disc; the sorting tray is characterized in that a liquid discharging groove is further formed in the sorting tray, the liquid discharging groove is communicated with the bottom of the sorting tray rolling groove, and a metal cleaning agent in the sorting tray rolling groove flows into the detergent receiving groove through the liquid discharging groove. The metal cleaning agent can also flow into the detergent receiving groove by flowing over the groove of the material collecting tray rolling groove. The metal cleaning agent in the detergent receiving tank is cleaned and filtered and then is placed in the detergent tank again, so that the metal cleaning agent can be reused, and waste is reduced.

The bottom of the unqualified product sieve is provided with an unqualified product sieve mesh, the bottom of the qualified product sieve is provided with a qualified product sieve mesh, the unqualified product sieve and the qualified product sieve are both positioned right above the detergent receiving tank, the pore diameters of the unqualified product sieve mesh and the qualified product sieve mesh are smaller than the diameter of a steel ball, a metal cleaning agent adhered to the steel ball flows into the detergent receiving tank through the sieve mesh, and the steel ball is left in the unqualified product sieve or the qualified product sieve.

The technical scheme also comprises a programmable logic controller, wherein the upper computer, the servo motor, the first proximity sensor, the electromagnet, the material pushing cylinder, the second proximity sensor and the detergent cylinder are respectively and electrically connected with the programmable logic controller.

The working process of the technical scheme is the same.

1. And pouring the cleaned and filtered metal cleaning agent into a detergent tank. Placing steel balls with standard sizes into a hopper for equipment initialization and size calibration, wherein the diameter of the standard steel balls is 5 +/-0.00 mm, and the reading of a digital dial indicator is zero when the standard steel balls are placed between a rolling groove and a rolling surface of a rotating disc; the measurement data of the digital dial indicator is less than zero when the measurement contact of the digital dial indicator extends downwards, and the measurement data of the digital dial indicator is greater than zero when the measurement contact of the digital dial indicator retracts upwards, wherein the unit is millimeter. And taking out the standard steel ball. And putting the cleaned steel balls to be detected into a hopper.

2. The backward direction from the rotating axis line of the rotating disc is an angle reference line, and the rotating disc blanking hole is positioned at an angle A in the clockwise direction when the rotating disc is at the initial position, wherein the angle A is in the range of 150-170 degrees. At the moment, the lowest steel ball in the hopper falls into the material pushing hole through the inlet of the feeding channel, when the second proximity sensor detects the existence of the steel ball, the programmable logic controller sends an instruction, the material pushing cylinder drives the material pushing pore plate to move in the feeding channel, so that the material pushing hole is not aligned with the inlet of the feeding channel up and down, but moves to the lower part to be aligned with the outlet of the feeding channel up and down, and the steel ball falls into the rolling groove of the rotating disk through the outlet of the feeding channel and the material falling hole of the lifting disk and is just positioned below the inclined plane. And after waiting for 0.5 to 1 second, the pushing cylinder resets, then the lowest steel ball in the hopper falls into the pushing hole through the inlet of the feeding channel, and is pushed when waiting for the next working cycle.

3. The detergent cylinder drives the corrugated pipe to compress, and the metal cleaning agent in the corrugated pipe flows into the liquid storage tank through the second one-way valve and the dropping hole of the lifting disc and then flows into the rotating disc rolling tank through the communicating tank to provide the metal cleaning agent for one time for the rotating disc rolling tank; and after waiting for 0.5-1 second, the detergent cylinder drives the corrugated pipe to stretch and reset, and the metal cleaning agent in the detergent tank flows into the corrugated pipe through the detergent pipe and the first one-way valve.

4. The servo motor drives the rotating disc to rotate in the anticlockwise direction, and the steel ball rotates a small arc section in the rolling groove of the rotating disc along with the anticlockwise direction until the top of the steel ball meets the inclined plane and then passes to the rolling surface; the rotating disc rolling groove drives the steel balls to rotate around a rotating shaft core line of the rotating disc in the anticlockwise direction, the lower surface of the lifting disc prevents the steel balls from rotating in the anticlockwise direction, therefore, the steel balls roll between the rotating disc rolling groove and the lower surface of the lifting disc and rotate around the rotating shaft core line of the rotating disc, the actual rotating angular speed of the steel balls around the rotating shaft core line of the rotating disc is half of the angular speed of the rotating disc, when the rotating disc blanking hole rotates by about twice of an angle A, the steel balls reach a position with a clockwise angle B from an angle datum line, the steel balls also move to the position, the rotating disc blanking hole catches up the steel balls, and the steel balls fall to the bottom of the sorting disc rolling groove through the rotating disc blanking hole and are still in the surrounding of the rotating disc blanking hole.

During the rolling of the steel balls between the rolling groove and the rolling surface of the rotating disc, only one diameter in the vertical direction holds the rolling surface at a certain moment, the lifting disc is held upwards, the top surface of the lifting disc pushes upwards a measuring contact of the digital dial indicator, and then the diameter data in the vertical direction is measured by the digital dial indicator, collected and stored by an upper computer.

The diameter of the steel ball is equal to the sum of the nominal diameter value of the steel ball of the type of 5 mm and data collected by the digital dial indicator. The steel balls roll along a circular arc path instead of a linear path, the instantly-changed vertical diameter is not on the same large circle, but the rolling large circle is always changed, the vertical diameter is also always changed, a plurality of different diameters are successively changed into the vertical direction, and the diameter changed into the vertical direction is measured by the digital dial indicator, collected and stored by the upper computer; the invention has the advantages that the diameter in the vertical direction is more, the diameter data in multiple directions are acquired, compared with the method that the diameter in three different directions is only measured manually, the data volume can be hundreds of times, and the probability of measuring the unqualified diameter is greatly improved;

all data are respectively judged whether the data fall into the range of [ -0.05, +0.05] millimeter, the data falling into the range are qualified, and the data not falling into the range are unqualified. And if one datum is unqualified, judging the steel ball to be unqualified.

In the process, the rotating disc rolling groove rotates, the rubber brush does not rotate, the rubber brush scrubs the inner wall of the rotating disc rolling groove to drive the metal cleaning agent to flow, and dirt in the rotating disc rolling groove flows to the sorting disc rolling groove through the rotating disc blanking hole along with the metal cleaning agent and flows to the lower detergent receiving groove through the liquid discharging groove.

5. The steel balls continue to roll and rotate along the material sorting disc rolling groove under the pushing of the material falling hole of the rotating disc, rotate to the position right ahead of the rotating axis of the rotating disc, fall through the material sorting disc material falling hole, pass through the first proximity sensor, and obtain a signal that the steel balls fall through detection.

If the steel ball is qualified, the electromagnet is electrified to generate magnetic attraction force on the steel ball, the steel ball is attached to the guide vertical groove to roll downwards, then the steel ball turns to roll downwards along the guide inclined groove, and finally the falling path deviates from the original vertical direction and falls into the qualified product sieve. And after waiting for 0.5 to 1 second, the electromagnet is powered off.

If the steel ball is unqualified, the electromagnet is not electrified, the magnetic attraction force is not generated, and the steel ball vertically falls down along the guide vertical groove through the material falling hole of the material sorting disc and falls into an unqualified product sieve.

6. The servo motor drives the rotating disc to rotate to the initial position again, and the rotating disc blanking hole is arranged at the position of an angle A in the clockwise direction to be ready for the next circulation.

And (4) continuously repeating the steps 2 to 6, detecting the steel balls in the hopper one by one, and placing the steel balls in the hopper into a unqualified product sieve and a qualified product sieve according to the judgment result. And under the drive of a servo motor, detecting one steel ball every time the rotating disc rotates one circle.

According to the second technical scheme, the control method of the automatic steel ball diameter detection device for the hub of the electric vehicle comprises the following steps of:

s1, a servo motor drives a rotating disc to rotate to an initial position, the backward direction from the rotating axis of the rotating disc is an angle datum line, and a blanking hole of the rotating disc is positioned at an angle A in the clockwise direction; a is in the range of 150 to 170 degrees;

s2, detecting existence of steel balls by a second proximity sensor; namely, the lowest steel ball in the hopper falls into the material pushing hole through the inlet of the feeding channel;

s3, the material pushing cylinder drives a material pushing pore plate, the material pushing pore plate is not aligned with the inlet of the feeding channel up and down any more, but is moved to the lower part to be aligned with the outlet of the feeding channel up and down, and the steel balls fall into the rolling groove of the rotating disk through the outlet of the feeding channel and the blanking pore of the lifting disk;

after waiting for 0.5 to 1 second, the material pushing cylinder resets, then the lowest steel ball in the hopper falls into the material pushing hole through the inlet of the feeding channel, and is pushed when waiting for the next working cycle;

s4, the corrugated pipe is driven to be compressed by the detergent cylinder, the metal cleaning agent in the corrugated pipe flows into the liquid storage tank through the second one-way valve and the dropping hole of the lifting plate, then flows into the rotating disc rolling tank through the communicating tank, and is provided for the first time; then the detergent cylinder drives the corrugated pipe to stretch and reset, and the metal cleaning agent in the detergent tank flows into the corrugated pipe through the detergent pipe and the first one-way valve.

S5, the servo motor drives the rotating disc to rotate in the counterclockwise direction, and the steel balls rotate in the rolling groove of the rotating disc in the counterclockwise direction until the tops of the steel balls meet the inclined plane; the bottom surface of the rolling groove of the rotating disc drives the steel balls to rotate in the anticlockwise direction, the lower surface of the lifting disc prevents the steel balls from rotating in the anticlockwise direction, the steel balls roll around the rotating axis of the rotating disc while rotating under the combined action of two planes, the actual rotating angular speed is half of the angular speed of the rotating disc, when the blanking hole of the rotating disc rotates by about 2 times of the angle A, the steel balls reach a position B which is a clockwise angle from an angle datum line, the position B is approximately equal to the position A, the steel balls move to the position at the same time, the blanking hole of the rotating disc catches up with the steel balls, and the steel balls fall to the bottom of the rolling groove of the sorting disc through the blanking hole of the rotating disc and are still in the enclosure of the blanking hole of the rotating disc;

the upper computer collects and stores data through a digital dial indicator;

s6, judging data; respectively judging whether all the data fall into an interval range of [ -0.05, +0.05] millimeter, wherein the data falling into the interval range are qualified, and the data not falling into the interval range are unqualified; if only one datum is unqualified, judging the steel ball as unqualified;

s7, the first proximity sensor detects that the steel ball passes through; if the steel ball is judged to be qualified, the electromagnet is electrified to generate magnetic attraction force on the steel ball, the steel ball is attached to the guide vertical groove to roll downwards, then the steel ball is turned to roll along the guide inclined groove to roll obliquely downwards, and finally the falling path deviates from the original vertical direction and falls into a qualified product sieve; the electromagnet is powered off after waiting for 0.5 to 1 second;

if the steel ball is judged to be unqualified, the electromagnet is not electrified, does not generate magnetic attraction, and vertically falls down along the guide vertical groove through the material-picking tray material-falling hole to fall into an unqualified product sieve;

the steps S1 to S7 are repeated continuously, so that the steel balls in the hopper can be detected one by one, and the steel balls are placed on the unqualified product sieve and the qualified product sieve according to the judgment result.

The invention has the beneficial effects that:

1. the automatic steel ball sorting machine has the advantages that feeding, detection, judgment and sorting are automatic, detection is rapid and accurate, the diameter of multiple directions is detected, detection data are more, and the detection probability of unqualified steel balls is greatly improved; the efficiency is improved, and conditions are provided for the whole detection of the steel balls.

Only a small part of steel balls are randomly extracted for measurement in manual detection, and unqualified steel balls can exist in a large number of steel balls which are not extracted, but are not detected; one steel ball only measures the diameter of three orientations, and the diameters of most other orientations may have unqualified diameters but are not detected; finally, a plurality of steel balls are unqualified and are judged to be qualified products to be applied to the electric vehicle, and hidden quality or potential safety hazards are buried; after manual detection, data are recorded, analyzed and judged, the time is long, and the working efficiency is very low.

The invention has rapid detection, can extract more steel balls for measurement or complete measurement, has a plurality of azimuth diameters instantly changed into vertical diameters in the process that one steel ball rolls along the rolling angle B of the circular rotating disc rolling groove, the diameter is detected, and the probability of unqualified diameter detection is greatly improved, so the detection accuracy is greatly improved; the system can detect and judge at the same time, the process is completed instantly, and the working efficiency is greatly improved.

2. The dirt is automatically cleaned, and the accuracy of a detection result is ensured.

3. The labor is saved, and the labor intensity of workers is reduced.

Drawings

FIG. 1 is a schematic three-dimensional structure of a first viewing angle in example 1 of the present invention;

FIG. 2 is a schematic three-dimensional structure of a second perspective view of embodiment 1 of the present invention;

fig. 3 is a schematic three-dimensional structure of the measuring assembly 1;

fig. 4 is a partially sectional view of the three-dimensional structure of the combination of the lifting plate 14 and the linear guide 13;

FIG. 5 is a schematic three-dimensional structure of the rotary disk 16;

fig. 6 is a schematic three-dimensional structure of the picking assembly 2;

fig. 7 is a schematic three-dimensional structure of reject screen 3;

fig. 8 is a front sectional view of the feeder 5;

FIG. 9 is a partial cross-sectional schematic view of the three-dimensional structure of the combination of the feed channel block 52 and the second proximity sensor 55;

fig. 10 is a schematic three-dimensional structure of a combination of the pushing aperture plate 53 and the pushing cylinder 54;

fig. 11 is a schematic three-dimensional structure of the detergent pusher 6;

FIG. 12 is a top view of the rotary plate 16 in an initial position;

FIG. 13 is a top view of the rotary plate 16 when the rotary plate blanking hole 162 catches up the steel ball 9;

FIG. 14 is a top view of the carousel 16 as the steel balls 9 fall through the picker disk drop holes 212;

FIG. 15 is a schematic view showing a control relationship of a control system according to embodiment 1 of the present invention;

FIG. 16 is a process flow chart of the control method of example 2 of the present invention.

In the figure:

1-a measurement assembly; 11-digital dial gauge; 12-a slide block; 13-a linear guide rail; 14-a lifting disc; 141-a rolling surface; 142-lifting plate blanking hole; 143-rubber brushes; 144-a bevel; 145-lifting plate drip holes; 146-a top surface of the lifting plate; 147-lifting disc feed level; 148-an upper computer; 15-a servo motor; 16-a rotating disc; 161-rotating disk rolling grooves; 162-rotating disc blanking aperture; 163-a reservoir; 164-a communication channel; 165-rotating disk upper surface; 2-a picking assembly; 21-a material-picking groove disc; 211-picking tray rolling groove; 212-picking tray drop holes; 213-a liquid discharge tank; 22-a first proximity sensor; 23-an electromagnet; 231-guide vertical slots; 232-guide inclined groove; 3-screening unqualified products; 31-unqualified product sieve pores; 4-screening qualified products; 5-a feeder; 51-a hopper; 52-feed channel block; 521-a feed channel; 522-a pusher plate via hole; 523-inlet of feed channel; 524-outlet of the feeding channel; 53-pushing pore plate; 531-pusher holes; 54-material pushing cylinder; 541-pushing cylinder body; 542-pushing cylinder piston rod; 55-a second proximity sensor; 6-detergent pusher; 61-detergent cylinder; 62-a bellows; 63-a first one-way valve; 64-a second one-way valve; 641-second check valve outlet; 65-a detergent tank; 66-detergent tube; 7-a detergent receiving tank; 8-a frame; 9-steel balls; 10-programmable logic controller. A-the position of the rotating disc blanking hole 162 at the initial angle, a =160 degrees; b-the angular position of the rotating disc blanking hole 162 when catching up the steel ball 9; the direction indicated by the arrow at F is forward; the direction indicated by the arrow at K is the direction in which the rotary disk 16 rotates counterclockwise.

Detailed Description

The technical solutions in the present invention will be described clearly and completely with reference to the following embodiments and the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Embodiment 1, an automatic detection device of steel ball diameter for electric vehicle wheel hub, as shown in fig. 1-15, includes a frame 8 and a measuring component 1; the measuring assembly 1 comprises a digital dial indicator 11, an upper computer 148, a sliding block 12, a linear guide rail 13, a lifting disc 14, a servo motor 15 and a rotating disc 16;

as shown in fig. 3 and 5, the rotary disk 16 is coupled with the frame 8 through a revolute pair, the housing of the servo motor 15 is fixedly coupled with the frame 8, the output shaft of the servo motor 15 is fixedly coupled with the rotary disk 16, the servo motor 15 drives the rotary disk 16 to rotate in a counterclockwise direction when viewed from top to bottom, and the servo motor 15 is positioned below the rotary disk 16; the rotating disc 16 is provided with a rotating disc upper surface 165, the rotating disc upper surface 165 is a plane which faces horizontally upwards, an annular rotating disc rolling groove 161 is formed in the rotating disc upper surface 165, and the annular axis of the rotating disc rolling groove 161 is overlapped with the rotating axis of the rotating disc 16; a rotating disc blanking hole 162 which is through up and down is arranged at the bottom of the rotating disc rolling groove 161; the groove width of the cross section of the rotating disc rolling groove 161 is 1.2 times of the diameter of the steel ball 9, the groove depth is 0.6 times of the diameter of the steel ball 9, the steel ball 9 freely rolls in the rotating disc rolling groove 161 along the circumferential direction, and the upper part of the steel ball is exposed out of the upper surface 165 of the rotating disc;

as shown in fig. 3 and 4, the lifting plate 14 is provided with a rolling surface 141, and the rolling surface 141 is a downward horizontal surface; the lifter plate 14 further has a lifter plate top surface 146, the lifter plate top surface 146 being an upwardly facing horizontal surface; the linear guide rail 13 is fixedly connected with the lifting disc 14; the slide block 12 is fixedly connected with the frame 8; the linear guide rail 13 and the slide block 12 are matched to form a precise linear guide rail pair, and the lifting disc 14 slides along the vertical direction; the rolling surface 141 and the groove bottom of the rotating disk rolling groove 161 are always kept parallel; the rolling surface 141 is positioned right above the rotating disk rolling slot 161; when the lifting disc 14 is located at the lowermost end of the stroke, the vertical distance between the rotating disc upper surface 165 and the rolling surface 141 is 0.2 times the diameter of the steel ball 9; the lifting tray 14 is also provided with a lifting tray feeding surface 147 and a lifting tray blanking hole 142, the lifting tray feeding surface 147 is horizontally upward, the lifting tray blanking hole 142 is through up and down, and the upper opening and the lower opening of the lifting tray blanking hole 142 are respectively arranged on the lifting tray feeding surface 147 and the rolling surface 141; the lower opening of the lifting disc blanking hole 142 is positioned right above the rotating disc rolling groove 161;

as shown in fig. 3, the dial indicator body of the dial indicator 11 is fixedly connected with the frame 8, and the measuring contact of the dial indicator 11 vertically touches the top surface 146 of the lifting disc; the upper computer 148 is electrically connected with the digital dial indicator 11, and the upper computer 148 collects size data of the vertical displacement of the lifting disc 14.

The present embodiment further comprises a feeder 5; as shown in fig. 8 to 10, the feeder 5 includes a hopper 51, a feeding channel block 52, a pushing hole plate 53, a pushing cylinder 54, and a second proximity sensor 55; the feeding channel block 52 is fixedly connected with the frame 8; a horizontal feeding channel 521 is arranged in the feeding channel block 52, and a first end of the feeding channel 521 is provided with a material pushing plate through hole 522; an upward through feeding channel inlet 523 is arranged on the upper wall of the feeding channel 521, a downward through feeding channel outlet 524 is arranged on the lower wall of the feeding channel 521, and the feeding channel inlet 523 and the feeding channel outlet 524 are staggered and not aligned; the second proximity sensor 55 is mounted on the lower wall of the feed channel 521 below the feed channel inlet 523; the material pushing pore plate 53 is provided with a material pushing pore 531 which is through up and down; the material pushing cylinder 54 comprises a material pushing cylinder body 541 and a material pushing cylinder piston rod 542; the pushing cylinder body 541 is fixedly connected with the frame 8, and the pushing cylinder piston rod 542 is fixedly connected with the pushing orifice plate 53; the hopper 51 is fixedly connected with the frame 8, the hopper 51 is funnel-shaped, a material falling hole of the hopper 51 is positioned right above the feeding channel inlet 523, and the material falling hole of the hopper 51 and the feeding channel inlet 523 are only filled with one steel ball 9 at a time. The material pushing cylinder 54 drives the material pushing pore plate 53 to reciprocate in the feeding channel 521, and the material pushing pores 531 are respectively aligned with the feeding channel inlet 523 upwards and aligned with the feeding channel outlet 524 downwards at two ends of the stroke; the feed channel outlet 524 is aligned downward with the upper mouth of the lifter plate drop hole 142. The feeding channel block 52 and the pushing hole plate 53 are both made of non-metal materials, the second proximity sensor 55 is a sensor capable of detecting metal, and the steel ball 9 can detect and generate an electric signal when approaching.

The embodiment also comprises a material picking component 2; as shown in fig. 6, the picking assembly 2 comprises a picking chute disc 21, a first proximity sensor 22 and an electromagnet 23; the material-picking groove disc 21 is fixedly connected with the frame 8; the sorting groove disc 21 is provided with an annular sorting disc rolling groove 211, and the axis of the sorting disc rolling groove 211 is superposed with the axis of rotation of the rotating disc 16; the depth of the material picking disc rolling groove 211 is less than half of the diameter of the steel ball 9; a material-picking disc blanking hole 212 which is through up and down is arranged in the material-picking disc rolling groove 211; the electromagnet 23 is fixedly connected with the frame 8; the electromagnet 23 is provided with a guide groove, the cross section of the guide groove is semicircular, the guide groove is divided into two sections which are smoothly connected, one section of the guide groove is close to the upper vertical groove 231, the other section of the guide groove is close to the lower inclined groove 232, the guide groove 231 is positioned right below the material picking disc blanking hole 212, and the axial lead of the guide vertical groove 231 is superposed with the axial lead of the material picking disc blanking hole 212; the first proximity sensor 22 is arranged on the inner wall of the material-picking disc blanking hole 212 through a mounting hole, and detects whether the steel ball 9 passes through the hole; for the steel balls 9 which are detected to be unqualified, the electromagnet 23 is not electrified, does not generate magnetic attraction force, and vertically falls down along the guide vertical groove 231 through the material picking disc blanking hole 212; for the steel balls 9 qualified in detection, the electromagnet 23 is electrified to generate magnetic attraction, the steel balls 9 are attracted to the guide vertical groove 231, and roll downwards along the guide vertical groove 231 under the action of gravity, then turn to and roll downwards along the guide inclined groove 232, and finally the falling path deviates from the original vertical direction. The pick tray 21 is constructed of a non-metallic material so as not to interfere with the detection of steel balls within the pick tray drop holes 212 by the first proximity sensor 22.

The orientation of the lifter plate drop hole 142 with respect to the rotational axis of the turntable 16 is defined as the rear, and the orientation of the picker plate drop hole 212 with respect to the rotational axis of the turntable 16 is defined as the front F; the rotating plate drop holes 162 align up and down with the lift plate drop holes 142 at the rear, rotate 180 degrees and turn to the front to align up and down with the picker plate drop holes 212. The tangential direction of the counterclockwise rotation of the turntable blanking hole 162 at the rear is defined as the right direction, and the direction opposite to the right direction is defined as the left direction.

As shown in fig. 1 and 2, the present embodiment further includes a reject sieve 3 and a accept sieve 4; the upper opening of the unqualified product sieve 3 is positioned right below the guide vertical groove 231; the upper opening of the certified product sieve 4 is positioned right below the lower end of the guide inclined groove 232. To detect unqualified steel ball 9, electro-magnet 23 is not switched on, does not produce magnetic attraction, falls down vertically along vertical groove 231 of direction through material-sorting tray blanking hole 212, falls into unqualified product sieve 3. To detect qualified steel ball 9, electro-magnet 23 circular telegram, produce magnetic attraction, steel ball 9 is attracted on direction vertical slot 231, rolls down along direction vertical slot 231 under the action of gravity, then turns to again and rolls along direction inclined groove 232 below to the slope, and the route that finally falls has deviated from original vertical direction, just in time falls into qualified product sieve 4. Thus, the purpose of sorting qualified products and unqualified products is achieved.

The sensor comprises a first proximity sensor 22 and a second proximity sensor 55, wherein the selected proximity switch is an SJS0308N type ultra-small cylindrical proximity switch produced by Shenzhen Shite Anbang science and technology Limited company, and can rapidly generate an electric signal for a metal object which is close to the proximity switch, namely a steel ball 9.

This embodiment further comprises a detergent pusher 6; as shown in fig. 11, the detergent pusher 6 includes a detergent cylinder 61, a bellows 62, a first check valve 63, a second check valve 64, a detergent tank 65, and a detergent pipe 66; the corrugated pipe 62 is made of elastic engineering plastics, two ends of the corrugated pipe are closed, and a cavity is arranged in the corrugated pipe; the cylinder body of the detergent cylinder 61 is fixedly connected with the frame 8, the second end of the corrugated pipe 62 is fixedly connected with the frame 8, and the piston rod of the detergent cylinder 61 is fixedly connected with the first end of the corrugated pipe 62; the height of the bottom of the detergent tank 65 is higher than that of the corrugated pipe 62; the first end of the detergent pipe 66 is communicated with the detergent groove 65, the second end of the detergent pipe 66 is communicated with the inner cavity of the corrugated pipe 62, and the first one-way valve 63 is arranged on the detergent pipe 66; a first end of the second one-way valve 64 is communicated with the inner cavity of the corrugated pipe 62; the metal cleaning agent is stored in the detergent tank 65;

the lifting disc 14 is further provided with a lifting disc dropping hole 145 which is through up and down, as shown in fig. 4, the upper opening of the lifting disc dropping hole 145 is arranged on the lifting disc feeding surface 147, the second end of the second one-way valve 64 is arranged right above the lifting disc dropping hole 145, the lower opening of the lifting disc dropping hole 145 is arranged on the rolling surface 141, and the lower opening of the lifting disc dropping hole 145 is not arranged right above the rotating disc rolling groove 161, so that the problem that the steel ball 9 is just embedded in the lower opening of the lifting disc dropping hole 145 when rolling to cause the measurement of wrong size is avoided; the upper surface of the rotating disc is also provided with a liquid storage tank 163, the lower opening of the dropping hole 145 of the lifting disc is arranged above the liquid storage tank 163, and the liquid storage tank 163 is communicated with the rotating disc rolling tank 161 through a communicating groove 164; the bottom surface of the communication groove 164 is higher than the bottom surface of the rotating disk rolling groove 161 to prevent the steel balls 9 from rolling into the communication groove 164 by mistake. The metal cleaning agent cleans and flushes the rotating disc rolling groove 161, and prevents the dirt in the rotating disc rolling groove 161 from influencing the detection result.

The lifting plate 14 is further provided with a rubber brush 143, as shown in fig. 4, the rubber brush 143 is fixedly mounted on the rolling surface 141, and the rubber brush 143 is embedded in the rotating plate rolling groove 161 and can be used for brushing the rotating plate rolling groove 161 to promote the metal cleaning agent to flow therein and quickly take away dirt.

The rolling surface 141 is further provided with an inclined surface 144, as shown in fig. 4, the inclined surface 144 is obtained by removing materials on the rolling surface 141 along an inclined direction, and a lower opening of the lifting disc blanking hole 142 is arranged on the inclined surface 144; at the position of the inclined plane 144 on the lifting tray 14, the thickness of the lifting tray 14 at the left side of the lifting tray blanking hole 142 is thinner than that at the right side, and the right side of the inclined plane 144 is smoothly connected with the rolling surface 141. Under the condition of the inclined surface 144, the steel ball 9 falls from the lifting disc blanking hole 142, enters the lower part of the rolling surface 141 through the inclined surface, and rolls along with the rotating disc 16 rotating counterclockwise; preventing such a situation from occurring: the lower opening of the lifting disc blanking hole 142 limits the steel ball 9 not to move anticlockwise, and the steel ball 9 can only roll along with the rolling groove 161 of the rotating disc in situ.

The present embodiment further includes a detergent receiving groove 7, as shown in fig. 1 and 2, located right below the pick-up groove tray 21; the sorting tray 21 is also provided with a liquid discharging groove 213, the liquid discharging groove 213 is communicated with the bottom of the sorting tray rolling groove 211, and the metal cleaning agent in the sorting tray rolling groove 211 flows into the detergent receiving groove 7 through the liquid discharging groove 213. The metal cleaning agent in the cleaning agent receiving tank 7 is cleaned and filtered and then is put into the cleaning agent tank 65 again, so that the metal cleaning agent can be reused, and waste is reduced.

The bottom of the unqualified product sieve 3 is provided with an unqualified product sieve pore 31, the bottom of the qualified product sieve 4 is provided with a qualified product sieve pore, the unqualified product sieve 3 and the qualified product sieve 4 are both positioned right above the detergent receiving tank 7, the pore diameters of the unqualified product sieve pore 31 and the qualified product sieve pore are both smaller than the diameter of the steel ball 9, the metal cleaning agent adhered to the steel ball 9 flows into the detergent receiving tank 7 through the sieve pores, and the steel ball 9 is left in the unqualified product sieve 3 or the qualified product sieve 4.

The embodiment further includes a programmable logic controller 10, as shown in fig. 15, the upper computer 148, the servo motor 15, the first proximity sensor 22, the electromagnet 23, the material pushing cylinder 54, the second proximity sensor 55, and the detergent cylinder 61 are electrically connected to the programmable logic controller 10, respectively.

The working process of this embodiment is such.

1. The cleaned and filtered metal cleaner is poured into the detergent tank 65. The steel balls with standard sizes are put into the hopper 51 for equipment initialization and size calibration, the diameter of the standard steel ball is 5 +/-0.00 mm, and the reading of the digital dial indicator 11 is zero when the standard steel ball is put between the rolling groove 161 and the rolling surface 141 of the rotating disc; the measurement data is less than zero when the measurement contact of the digital dial indicator 11 extends downwards, and the measurement data is greater than zero when the measurement contact of the digital dial indicator 11 retracts upwards, wherein the unit is millimeter. And taking out the standard steel ball. And putting the cleaned steel ball 9 to be detected into the hopper 51.

2. As shown in fig. 12, the direction rearward from the rotation axis of the turntable 16 is an angle reference line, and the turntable blanking hole 162 is at an angle a in the clockwise direction when the turntable 16 is at the initial position, a =160 degrees. At this time, the lowest steel ball 9 in the hopper 51 falls into the material pushing hole 531 through the feeding channel inlet 523, when the second proximity sensor 55 detects the presence of the steel ball 9, the programmable logic controller 10 sends an instruction, the material pushing cylinder 54 drives the material pushing pore plate 53 to move in the feeding channel 521, so that the material pushing hole 531 is no longer aligned with the feeding channel inlet 523 up and down, but moves to the lower side to be aligned with the feeding channel outlet 524 up and down, and the steel ball 9 falls into the rotating disc rolling groove 161 through the feeding channel outlet 524 and the lifting disc blanking hole 142 as shown in fig. 12, and is also located just below the inclined plane 144. After waiting for 0.5 second, the pushing cylinder 54 is reset, and then the lowest steel ball 9 in the hopper 51 falls into the pushing hole 531 through the feeding channel inlet 523 to be pushed when waiting for the next working cycle.

3. The detergent cylinder 61 drives the corrugated pipe 62 to compress, the metal cleaning agent in the corrugated pipe 62 flows into the liquid storage tank 163 through the second one-way valve 64 and the lifting disc dropping hole 145, and then flows into the rotating disc rolling tank 161 through the communicating tank 164, and the metal cleaning agent is supplied to the rotating disc rolling tank 161 for the first time; after waiting for 1 second, the detergent cylinder 61 drives the corrugated pipe 62 to stretch and reset, and the metal cleaning agent in the detergent tank 65 flows into the corrugated pipe 62 through the detergent pipe 66 and the first check valve 63.

4. The servo motor 15 drives the rotating disc 16 to rotate in the counterclockwise direction, and the steel ball 9 rotates in the rotating disc rolling groove 161 along with the counterclockwise direction for a small arc section until the top of the steel ball 9 meets the inclined plane and then passes to the rolling surface 141; the rotating disc rolling groove 161 drives the steel ball 9 to rotate in the counterclockwise direction, and the lower surface of the lifting disc 14 prevents the steel ball 9 from rotating in the counterclockwise direction, so that the steel ball 9 rolls between the rotating disc rolling groove 161 and the lower surface of the lifting disc 14 and rotates around the rotation axis of the rotating disc 16, the actual rotation angular speed of the steel ball 9 around the rotation axis of the rotating disc 16 is half of the angular speed of the rotating disc 16, as shown in fig. 13, when the rotating disc dropping hole 162 rotates about 320 degrees, the position reaches the position of about B =160 degrees clockwise from the angle reference line, the steel ball 9 moves to the position, the rotating disc dropping hole 162 catches up the steel ball 9, and the steel ball 9 drops to the bottom of the sorting disc rolling groove 211 through the rotating disc dropping hole 162 while still being in the enclosure of the rotating disc dropping hole 162.

During the rolling of the steel ball 9 between the rolling groove 161 and the rolling surface 141 of the rotating disc, only one vertical diameter holds up the rolling surface 141 at a certain moment, the lifting disc 14 is held up, the top surface 146 of the lifting disc pushes up the measuring contact of the digital dial indicator 11, and then the diameter data at a certain moment is measured by the digital dial indicator 11 and is collected and stored by the upper computer 148.

The diameter of the steel ball 9 is equal to the sum of the nominal diameter value of the steel ball of the type of 5 mm and data collected by the digital dial indicator. The steel ball 9 rolls along a circular arc path instead of a linear path, the instantly-changed vertical diameter is not on the same large circle, but the rolling large circle is always changed, the vertical diameter is also always changed, a plurality of different diameters are successively changed into the vertical direction, and the diameter changed into the vertical direction is measured by a digital dial indicator, collected and stored by an upper computer; the invention has the advantages that the diameter in the vertical direction is changed, the diameter data are collected, the diameter data in multiple directions are collected, compared with the method that only the diameters in three different directions are manually measured, the data volume can be hundreds of times, and the probability that the unqualified diameter is measured is greatly improved;

all data are respectively judged whether the data fall into the range of [ -0.05, +0.05] millimeter, the data falling into the range are qualified, and the data not falling into the range are unqualified. If only one data is unqualified, the steel ball 9 is judged to be unqualified.

In this process, the spin plate rolling groove 161 rotates while the rubber brush 143 does not rotate, the rubber brush 143 brushes against the inner wall of the spin plate rolling groove 161, the metal cleaner is driven to flow, and the contaminants in the spin plate rolling groove 161 flow to the pick plate rolling groove 211 through the spin plate blanking hole 162 and to the detergent receiving groove 7 below through the bleed groove 213 along with the metal cleaner.

5. The steel ball 9 continues to roll and rotate along the sorting tray rolling groove 211 under the pushing of the rotary tray blanking hole 162, and rotates to the right front of the rotation axis of the rotary tray 16, as shown in fig. 14, the steel ball 9 falls through the sorting tray blanking hole 212, passes through the first proximity sensor 22, and is detected to obtain a signal that the steel ball 9 has fallen.

If the steel ball 9 is qualified, the electromagnet 23 is electrified to generate magnetic attraction force on the steel ball 9, the steel ball 9 is attached to the guide vertical groove 231 to roll downwards, then the steel ball turns to roll downwards along the guide inclined groove 232, and finally the falling path deviates from the original vertical direction and falls into the qualified product sieve 4. The electromagnet 23 is de-energized after waiting for 1 second.

If the steel ball 9 is unqualified, the electromagnet 23 is not electrified and does not generate magnetic attraction force, and the steel ball falls vertically along the guide vertical groove 231 through the material-picking disc material-falling hole 212 and falls into the unqualified product sieve 3.

6. The servo motor 15 drives the rotary disc 16 to rotate again to the initial position, and the rotary disc blanking hole 162 is at the clockwise angle a, a =160 degrees, ready for the next cycle, as shown in fig. 12.

The steps 2 to 6 are repeated continuously, so that the steel balls 9 in the hopper 51 can be detected one by one, and are respectively placed on the unqualified product sieve 3 and the qualified product sieve 4 according to the judgment result. Under the drive of the servo motor 15, the rotating disc 16 detects one steel ball 9 per rotation.

Embodiment 2, a control method of an automatic steel ball diameter detection device for an electric vehicle hub, as shown in fig. 16, includes the following steps:

s1, a servo motor 15 drives a rotary disc 16 to rotate to an initial position, the position of the rotary disc 16 is shown in figure 12, the backward direction from the rotation axis of the rotary disc 16 is an angle reference line, a rotary disc blanking hole 162 is located at an angle A in the clockwise direction, and A =160 degrees;

s2, the second proximity sensor 55 detects that the steel ball 9 exists; namely, the lowest steel ball 9 in the hopper 51 falls into the material pushing hole 531 through the feeding channel inlet 523;

s3, the material pushing cylinder 54 drives the material pushing pore plate 53, the material pushing pore 531 is not aligned with the feeding channel inlet 523 up and down any more, but moves to the lower part to be aligned with the feeding channel outlet 524 up and down, and the steel balls 9 fall into the rotating disc rolling groove 161 through the feeding channel outlet 524 and the lifting disc blanking pore 142;

the material pushing cylinder 54 is reset, then the bottommost steel ball 9 in the hopper 51 falls into the material pushing hole 531 through the feeding channel inlet 523 again, and is pushed when waiting for the next working cycle;

s4, the detergent cylinder 61 drives the corrugated pipe 62 to compress, the metal cleaning agent in the corrugated pipe 62 flows into the liquid storage tank 163 through the second one-way valve 64 and the lifting disc dropping hole 145, then flows into the rotating disc rolling tank 161 through the communicating groove 164, and is provided for the rotating disc rolling tank 161 for the first time; then the detergent cylinder 61 drives the bellows 62 to be expanded and reset, and the metal cleaner in the detergent tank 65 flows into the bellows 62 through the detergent pipe 66 and the first check valve 63.

S5, the servo motor 15 drives the rotating disc 16 to rotate in the anticlockwise direction, and the steel ball 9 rotates in the anticlockwise direction in the rotating disc rolling groove 161 until the top of the steel ball 9 meets the inclined plane 144; the bottom surface of the rotating disc rolling groove 161 drives the steel ball 9 to rotate in the counterclockwise direction, and the lower surface of the lifting disc 14 prevents the steel ball 9 from rotating in the counterclockwise direction, so that the steel ball 9 rotates around the rotation axis of the rotating disc 16 while rolling on itself under the combined action of two planes, the actual rotation angular velocity is half of the angular velocity of the rotating disc 16, as shown in fig. 13, when the rotating disc blanking hole 162 rotates about 320 degrees, the steel ball 9 reaches a position with a clockwise angle of about B =160 degrees from the angle reference line, the steel ball 9 also moves to the position, the rotating disc blanking hole 162 catches up the steel ball 9, and the steel ball 9 falls to the groove bottom of the sorting disc rolling groove 211 through the rotating disc blanking hole 162, and is still in the enclosure of the rotating disc blanking hole 162, as shown in fig. 13;

the upper computer 148 collects and stores data through the digital dial indicator 11;

s6, judging data; respectively judging whether all the data fall into an interval range of [ -0.05, +0.05] millimeter, wherein the data falling into the interval range are qualified, and the data not falling into the interval range are unqualified; if only one datum is unqualified, the steel ball 9 is judged to be unqualified;

s7, the first proximity sensor 22 detects that the steel ball 9 passes through; if the steel ball 9 is judged to be qualified, the electromagnet 23 is electrified to generate magnetic attraction force on the steel ball 9, the steel ball 9 is attached to the guide vertical groove 231 to roll downwards, then the steel ball is turned to roll downwards along the guide inclined groove 232, and finally the falling path deviates from the original vertical direction and falls into the qualified product sieve 4; after waiting for 1 second, ensuring that the steel balls 9 fall into the qualified product sieve 4 and powering off the electromagnet 23;

if the steel ball 9 is judged to be unqualified, the electromagnet 23 is not electrified, does not generate magnetic attraction, and vertically falls down along the guide vertical groove 231 through the material-picking tray blanking hole 212 to fall into the unqualified product sieve 3;

the steps S1 to S7 are repeated continuously, so that the steel balls 9 in the hopper 51 can be detected one by one, and are respectively placed on the unqualified product sieve 3 and the qualified product sieve 4 according to the judgment result.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the present invention and its equivalent technology, it is intended that the present invention also include such modifications and variations.

Claims

1. An automatic steel ball diameter detection device for an electric vehicle hub comprises a rack (8) and a measurement component (1); the method is characterized in that: the measuring assembly (1) comprises a digital dial indicator (11), an upper computer (148), a sliding block (12), a linear guide rail (13), a lifting disc (14), a servo motor (15) and a rotating disc (16);

the rotating disc (16) is connected with the rack (8) through a rotating pair, the shell of the servo motor (15) is fixedly connected with the rack (8), the output shaft of the servo motor (15) is fixedly connected with the rotating disc (16), the servo motor (15) drives the rotating disc (16) to rotate towards the counterclockwise direction when viewed from top to bottom, and the servo motor (15) is positioned below the rotating disc (16); the rotary disc (16) is provided with a rotary disc upper surface (165), the rotary disc upper surface (165) is a plane which faces upwards horizontally, an annular rotary disc rolling groove (161) is formed in the rotary disc upper surface (165), and the annular axial lead of the rotary disc rolling groove (161) is overlapped with the rotary axial lead of the rotary disc (16); a rotary disc blanking hole (162) which is through up and down is arranged at the bottom of the rotary disc rolling groove (161); the groove width of the cross section of the rotating disc rolling groove (161) is 1.1 to 1.5 times of the diameter of the steel ball (9), the groove depth is 0.5 to 0.7 times of the diameter of the steel ball (9), the steel ball (9) freely rolls along the circumferential direction in the rotating disc rolling groove (161), and the upper part of the steel ball is exposed out of the upper surface (165) of the rotating disc; the lifting disc (14) is provided with a rolling surface (141), and the rolling surface (141) is a downward horizontal surface; the lifting disc (14) is also provided with a lifting disc top surface (146), and the lifting disc top surface (146) is an upward horizontal surface; the linear guide rail (13) is fixedly connected with the lifting disc (14); the sliding block (12) is fixedly connected with the frame (8); the linear guide rail (13) is matched with the sliding block (12) to form a linear guide rail pair, and the lifting disc (14) slides along the vertical direction; the rolling surface (141) is parallel to the bottom of the rotating disc rolling groove (161); the rolling surface (141) is positioned right above the rotating disk rolling groove (161); when the lifting disc (14) is positioned at the lowest end of the stroke, the vertical distance between the upper surface (165) of the rotating disc and the rolling surface (141) is 0.15 to 0.25 times the diameter of the steel ball (9); the lifting disc (14) is also provided with a lifting disc feeding surface (147) and a lifting disc blanking hole (142), the lifting disc feeding surface (147) is horizontally upward, the lifting disc blanking hole (142) is through up and down, and the upper opening and the lower opening of the lifting disc blanking hole (142) are respectively arranged on the lifting disc feeding surface (147) and the rolling surface (141); the lower opening of the lifting disc blanking hole (142) is positioned right above the rotating disc rolling groove (161); the gauge body of the digital dial indicator (11) is fixedly connected with the rack (8), and a measuring contact of the digital dial indicator (11) vertically touches the top surface (146) of the lifting disc downwards; the upper computer (148) is electrically connected with the digital dial indicator (11), and the upper computer (148) acquires the size data of the vertical displacement of the lifting disc (14); the lifting disc blanking hole (142) is positioned behind the rotating shaft axis of the rotating disc 16.

2. The automatic steel ball diameter detection device for the hub of the electric vehicle as claimed in claim 1, wherein: also comprises a feeder (5); the feeder (5) comprises a hopper (51), a feeding channel block (52), a pushing pore plate (53), a pushing cylinder (54) and a second proximity sensor (55); the feeding channel block (52) is fixedly connected with the rack (8); a horizontal feeding channel (521) is arranged in the feeding channel block (52), and a material pushing plate through hole (522) is arranged at the first end of the feeding channel (521); an upward through feeding channel inlet (523) is formed in the upper wall of the feeding channel (521), a downward through feeding channel outlet (524) is formed in the lower wall of the feeding channel (521), and the feeding channel inlet (523) and the feeding channel outlet (524) are staggered and not aligned; the second proximity sensor (55) is arranged on the lower wall of the feeding channel (521) and below the feeding channel inlet (523); the material pushing pore plate (53) is provided with a material pushing pore (531) which is through up and down; the material pushing cylinder (54) comprises a material pushing cylinder body (541) and a material pushing cylinder piston rod (542); the pushing cylinder body (541) is fixedly connected with the rack (8), and the pushing cylinder piston rod (542) is fixedly connected with the pushing pore plate (53); the hopper (51) is fixedly connected with the rack (8), the hopper (51) is funnel-shaped, and a material falling hole of the hopper (51) is positioned right above an inlet (523) of the feeding channel; the material pushing cylinder (54) drives the material pushing pore plate (53) to reciprocate in the feeding channel (521), and the material pushing pore plate (531) is respectively aligned with the inlet (523) of the feeding channel and aligned with the outlet (524) of the feeding channel in an upward mode at two ends of a stroke; the feed channel outlet (524) is aligned downward with an upper opening of the lifter plate blanking aperture (142).

3. The automatic steel ball diameter detection device for the hub of the electric vehicle as claimed in claim 2, wherein: the picking device also comprises a picking component (2); the picking assembly (2) comprises a picking groove disc (21), a first proximity sensor (22) and an electromagnet (23); the sorting trough disc (21) is fixedly connected with the rack (8); the sorting groove disc (21) is provided with an annular sorting disc rolling groove (211), and the axis of the sorting disc rolling groove (211) is superposed with the rotating axis of the rotating disc (16); the depth of the material picking disc rolling groove (211) is less than half of the diameter of the steel ball (9); a material-picking disc material-falling hole (212) which is through up and down is arranged in the material-picking disc rolling groove (211); the electromagnet (23) is fixedly connected with the rack (8); the electromagnet (23) is provided with a guide groove, the cross section of the guide groove is semicircular, the guide groove is divided into two sections which are smoothly connected, one section of the guide groove is close to the upper vertical groove (231), the other section of the guide groove is close to the lower inclined groove (232), the guide groove (231) is arranged right below the material sorting disc blanking hole (212), and the axial lead of the guide groove (231) is superposed with the axial lead of the material sorting disc blanking hole (212); the first proximity sensor (22) is installed on the inner wall of the material-picking tray blanking hole (212) through the installation hole; for steel balls (9) which are detected to be unqualified, the electromagnet (23) is not electrified, does not generate magnetic attraction force, and vertically falls down along the guide vertical groove (231) through the material sorting disc blanking hole (212); for the steel balls (9) qualified in detection, the electromagnet (23) is electrified to generate magnetic attraction, the steel balls (9) are attracted to the guide vertical groove (231), roll downwards along the guide vertical groove (231) under the action of gravity, then turn to the direction to roll downwards along the guide inclined groove (232), and finally fall off along a path deviating from the original vertical direction; the material-picking disc blanking hole (212) is positioned in front of the rotating shaft center line of the rotating disc (16).

4. The automatic steel ball diameter detection device for the hub of the electric vehicle as claimed in claim 3, wherein: also comprises a detergent pusher (6); the detergent pusher (6) comprises a detergent cylinder (61), a corrugated pipe (62), a first one-way valve (63), a second one-way valve (64), a detergent tank (65) and a detergent pipe (66); the corrugated pipe (62) is made of elastic engineering plastics, two ends of the corrugated pipe are closed, and a cavity is formed in the corrugated pipe; the cylinder body of the detergent cylinder (61) is fixedly connected with the rack (8), the second end of the corrugated pipe (62) is fixedly connected with the rack (8), and the piston rod of the detergent cylinder (61) is fixedly connected with the first end of the corrugated pipe (62); the height of the bottom of the detergent tank (65) is higher than that of the corrugated pipe (62); the first end of the detergent pipe (66) is communicated with the detergent groove (65), the second end of the detergent pipe (66) is communicated with the inner cavity of the corrugated pipe (62), and the first one-way valve (63) is arranged on the detergent pipe (66); the first end of the second one-way valve (64) is communicated with the inner cavity of the corrugated pipe (62); a metal cleaning agent is stored in the detergent tank (65);

the lifting disc (14) is also provided with a lifting disc liquid dropping hole (145) which is through up and down, the upper opening of the lifting disc liquid dropping hole (145) is arranged on the feeding surface (147) of the lifting disc, the second end of the second one-way valve (64) is arranged right above the lifting disc liquid dropping hole (145), the lower opening of the lifting disc liquid dropping hole (145) is arranged on the rolling surface (141), and the lower opening of the lifting disc liquid dropping hole (145) is not arranged right above the rotating disc rolling groove (161); the upper surface of the rotating disc is also provided with a liquid storage tank (163), the lower opening of the dropping hole (145) of the lifting disc is arranged above the liquid storage tank (163), and the liquid storage tank (163) is communicated with the rotating disc rolling tank (161) through a communicating groove (164); the bottom surface of the communication groove (164) is higher than the bottom surface of the rotating disk rolling groove (161).

5. The automatic steel ball diameter detection device for the hub of the electric vehicle as claimed in claim 4, wherein: the lifting disc (14) is further provided with a rubber brush (143), the rubber brush (143) is fixedly installed on the rolling surface (141), the rubber brush (143) is embedded into the rotating disc rolling groove (161), and the rubber brush (143) is used for brushing the rotating disc rolling groove (161).

6. An automatic steel ball diameter detecting device for an electric vehicle hub as claimed in claim 1, 2, 3, 4 or 5, wherein: the rolling surface (141) is also provided with an inclined surface (144), the inclined surface (144) is obtained by removing materials on the rolling surface (141) along the inclined direction, and the lower opening of the lifting disc blanking hole (142) is arranged on the inclined surface (144); the thickness of the lifting disc (14) on the left side of the lifting disc blanking hole (142) is thinner than that on the right side at the position of the lifting disc (14) with the inclined plane (144); the right side of the inclined surface (144) is smoothly connected with the rolling surface (141).

7. The automatic steel ball diameter detection device for the hub of the electric vehicle as claimed in claim 4 or 5, wherein: the washing machine is characterized by further comprising a programmable logic controller (10), wherein the upper computer (148), the servo motor (15), the first proximity sensor (22), the electromagnet (23), the material pushing cylinder (54), the second proximity sensor (55) and the detergent cylinder (61) are electrically connected with the programmable logic controller (10) respectively.

8. A control method of an automatic steel ball diameter detecting device for a hub of an electric vehicle as claimed in claim 7, comprising the steps of:

s1, a servo motor (15) drives a rotating disc (16) to rotate to an initial position;

s2, a second proximity sensor (55) detects that a steel ball (9) exists;

s3, driving a material pushing pore plate (53) by a material pushing cylinder (54); resetting the material pushing cylinder (54) after waiting for 0.5 to 1 second;

s4, the detergent cylinder (61) drives the corrugated pipe (62) to compress, and the detergent cylinder (61) drives the corrugated pipe (62) to stretch and reset;

s5, the servo motor (15) drives the rotating disc (16) to rotate in the anticlockwise direction, and the upper computer (148) collects and stores data through the digital dial indicator (11);

s6, judging data; judging whether the data fall into an interval range of [ -0.05, +0.05] millimeter, wherein the data falling into the interval range are qualified, and the data not falling into the interval range are unqualified; if only one datum is unqualified, the steel ball (9) is judged to be unqualified;

s7, the first proximity sensor (22) detects that the steel ball (9) passes through;

if the steel ball (9) is judged to be qualified, the electromagnet (23) is electrified; the electromagnet (23) is powered off after waiting for 0.5 to 1 second;

if the steel ball (9) is judged to be unqualified, the electromagnet (23) is not electrified;

the above steps S1 to S7 are continuously repeated.