CN211696969U

CN211696969U - Contact type automobile wheel side wall deformation detection system

Info

Publication number: CN211696969U
Application number: CN201922275321.3U
Authority: CN
Inventors: 郑学胜; 任有; 闫冠; 张志龙; 姜姗; 王靓喆
Original assignee: Jilin University
Current assignee: Jilin University
Priority date: 2019-12-18
Filing date: 2019-12-18
Publication date: 2020-10-16
Anticipated expiration: 2029-12-18

Abstract

The utility model relates to a contact auto wheel side wall deformation detecting system. The following technical scheme is adopted: the bearing guide shaft is fixedly installed on the guide rail platform through a base, the guide rail platform is installed on the guide rail seat in a sliding mode through an optical axis, the guide rail seat is horizontally fixed on a roller test bed, the detection cylinder is sleeved on the bearing guide shaft through a connecting plate and a motion sleeve, a sliding rod is installed at one end of the detection cylinder, a universal wheel is installed at the end part of the sliding rod, a displacement sensor is installed on the side wall of the detection cylinder, the position of the detection cylinder is adjustable, and the sliding rod can stretch out and draw back in the detection cylinder. The displacement sensor, the PLC main controller and the driver of the roller test bed are connected through signal lines in sequence, the PLC main controller is connected with the human-machine HMI terminal through a PCI bus, and the alarm is connected with the PLC main controller through the signal lines. The utility model discloses to the unable accurate detection of car side wall deformation, provide a small volume, low error, measure accurate, detect quick, the reliable detecting system of result.

Description

Contact type automobile wheel side wall deformation detection system

Technical Field

The utility model relates to a check out test set in vehicle detection area especially relates to a contact auto wheel side wall deformation detecting system.

Background

The tire is an important component of an automobile, and the basic structure mainly comprises a tire crown, a tire shoulder, a tire side and a toe opening. Among them, the sidewall is the weakest part of the tire, and during the vehicle driving, traffic accidents are often caused by the burst of the sidewall. The causes of sidewall puncture are mainly classified into two types: the tire pressure problem is that when tire pressure is insufficient, the tire resonance is easily caused, the deformation of the tire side exceeds the critical value under the action of huge resonance acting force, the rigidity of the tire side cannot bear, and the tire burst occurs. In addition, when the air pressure of the tire is insufficient, the sinking amount of the tire is increased, so that the tire side contacts the ground when the vehicle turns in a small radius, and the performance of the tire side is rapidly degraded under the action of high pressure and high temperature, so that the tire burst is directly caused. And secondly, the problem of tire side damage is solved, the tire is easy to manage in daily use, and the tire side becomes thin due to abrasion, scratch, crack and the like of the outer tire, the thickness is not uniform, the local position strength is reduced, and the deformation amount of the tire side is overlarge, so that tire burst occurs. Currently, the detection on the side wall of the automobile wheel mainly comprises appearance detection, and the disassembled wheel is detected by using an auxiliary instrument. The outward appearance is examined and is had the limitation, and it is big to dismantle wheel work load, and detection speed is slow, and the deformation condition of the unable dynamic detection wheel side wall of present detection. The deformation of the automobile wheel sidewall is embodied as the bulge of the sidewall, and the detection of the bulge is helpful for evaluating the state of the tire from the using effect of the tire so as to replace the tire in time and prevent the occurrence of tire burst. Therefore, it is necessary to design a detection system for detecting the deformation of the sidewall of the automobile wheel.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to the unable quick accurate problem that detects of auto wheel side wall deformation, provide a contact auto wheel side wall deformation detecting system that little volume, low error, measurement are accurate, detect fast, the result is reliable. The utility model discloses by the human-machine HMI terminal, PLC main control unit, the siren, parts such as measuring device and cylinder test bench constitute, control human-machine HMI terminal and start the detection procedure, the cylinder of PLC main control unit control cylinder test bench drives the wheel rotation that awaits measuring of car, and then the simulation car is in road surface motion, the protruding numerical value of deformation takes place for side wall a week each point when measuring device detects the wheel contact cylinder, the data that PLC main control unit collection measuring device detected is handled to the human-machine HMI terminal transmission, if the side wall is unusual then send the police dispatch newspaper and show the problem on human-machine HMI terminal interface, so that make the decision.

Referring to fig. 1 to 24, to achieve the above object, the present invention adopts the following technical solutions.

A contact type automobile wheel side wall deformation detection system comprises: roller test bench, guide rail seat, guide rail platform, hold guide shaft, test cylinder, man-machine HMI terminal, PLC main control unit and siren, the roller test bench is used for simulating road surface and drive wheel rotation, it passes through base fixed mounting on the guide rail platform to hold the guide shaft, the guide rail platform passes through optical axis slidable mounting on the guide rail seat, guide rail seat level is fixed on the roller test bench, the test cylinder passes through the connecting plate and the sleeve suit of moving is on holding the guide shaft, test cylinder one end is equipped with the slide bar, and the universal wheel is equipped with to the slide bar tip, be equipped with displacement sensor on the test cylinder lateral wall, the test cylinder position is adjustable: the sliding rod can extend and retract in the detection cylinder, and the position can be adjusted singly or in a combined manner; the displacement sensor is connected with the PLC main controller through a signal line, the PLC main controller is connected with a driver of the roller test bed through a signal line, the PLC main controller is connected with the human-machine HMI terminal through a PCI bus, and the alarm is connected with the PLC main controller through a signal line.

Further, a guide rail sliding block is arranged at the bottom of the guide rail platform and sleeved on an optical axis, the guide rail seat is composed of bosses fixed on four corners of the rectangular steel plate, and the optical axis is installed in a circular through hole with a notch in the middle of the boss and locked by bolts in the circular through hole at the notch of the side plane; the bearing guide shaft is a cylinder, the base with a circular through hole in the bottom rolls on the guide rail platform, two longitudinal grooves of the similar cuboid and two longitudinal grooves of the similar prismatic table with cross sections are symmetrically arranged on the surface of the cylinder, the longitudinal grooves of the similar cuboid are used for guiding, and the longitudinal grooves of the similar prismatic table are used for positioning.

Further, the motion sleeve comprises a circular steel cylinder and a rectangular steel plate, the joint is reinforced through a rib plate, the inner wall of the steel cylinder is symmetrically provided with two longitudinal convex ridges similar to a cuboid, the two longitudinal grooves of the cuboid are in sliding fit with the surface of the cylinder, the surface of the steel cylinder is symmetrically provided with two rectangular through holes, the two rectangular through holes are matched and positioned with the locking piece, the surface of the steel cylinder is symmetrically provided with two lifting lugs with the circular through holes, and the front end of the rectangular steel plate is processed with two circular through holes for being connected with the connecting plate through bolts.

Further, the retaining member includes: retaining member back plate, retaining member front bezel, retaining member fixed plate, retaining member handle and retaining member bolt, retaining member bolt both ends are equipped with the screw thread, lug round hole sliding fit assembly on middle polished rod and the motion sleeve pipe, retaining member back plate, retaining member front bezel and retaining member fixed plate suit are on the retaining member bolt, retaining member back plate and retaining member fixed plate pass through the nut to be fixed at retaining member bolt both ends, retaining member back plate and retaining member front bezel internal surface symmetry are equipped with vertical terrace with edge, and this vertical terrace with edge cooperatees with the rectangular through hole on the motion sleeve pipe, the processing of retaining member front bezel opposite side surface has hollow boss, and the boss center is provided with the circular through-hole in major diameter, be provided with circular boss in the middle of the retaining member fixed plate.

Further, the retaining member handle is the T-shaped piece, the threaded hole screw assembly on its threaded rod and the retaining member fixed plate to pass the circular through-hole in big footpath on the retaining member front bezel, it is fixed to be greater than the packing ring locking of the circular through-hole diameter on the retaining member front bezel through two nuts, it removes along the retaining member bolt to drive the retaining member front bezel through rotatory handle, make vertical terrace with edges on retaining member rear plate and the retaining member front bezel pass the rectangle through-hole on the motion sleeve pipe, with the vertical groove meshing that the epaxial cross-section of bearing is like terrace with edges, utilize the extrusion force on vertical groove both sides inclined plane to realize the auto-lock location.

Furthermore, the detection cylinder is sleeved on the sliding rod, two ends of the detection cylinder are respectively provided with a zero adjusting nut and an end cover, 4 rectangular through holes are longitudinally and uniformly distributed on the surface of the detection cylinder, the upper surface of the detection cylinder is connected with the connecting plate through a boss with a threaded hole, and the side surface of the detection cylinder is fixed with the displacement sensor through the boss with a threaded hole; the sliding rod is formed by welding round steel, a disc and a short cylinder, arc-shaped through holes are symmetrically formed in the side face of the disc, a guide rod which is matched and positioned with the longitudinal rectangular through hole in the surface of the detection cylinder is arranged on the outer surface of the disc, a compression spring is sleeved on the sliding rod between the disc and the end cover, and two ends of the compression spring are fixed on the disc and the end cover; the zero adjusting nut, the end cover and the detection cylinder are respectively connected with each other through threads and bolts and are in sliding fit connection with the sliding rod, the zero adjusting nut is used for adjusting the sliding rod to move to enable the universal wheel to be in contact with the side face of the wheel, and a common nut with the outer diameter larger than the inner diameter of the zero adjusting nut is arranged on the threads at the front end of the disc and can block the zero adjusting nut before the disc.

Furthermore, the universal wheel is a universal ball wheel and is in threaded connection with the sliding rod; the guide rod is contacted with a contact probe at one end of the displacement sensor through a steel sheet; the displacement sensor is a direct current rebound type LVDT displacement sensor;

furthermore, the PLC master controller is composed of a Siemens S7-200 PLC controller, a PLC-Base, a PLC power supply, a PLC CPU, a PLC input module, a PLC output module, a PLC servo module, a PLC signal module, a PLC CP module and a PLC IM module,

further, the human-computer HMI terminal selects a GP-4301TM type touch screen product produced by PROFACE; the alarm is an LED type acousto-optic alarm which emits light and sounds after being electrified.

The utility model has the advantages that:

1. contact auto wheel side wall deformation detecting system easy operation, measuring error are little, detect fast, stable in structure is reliable.

2. Contact auto wheel side wall deformation detecting system overcome the problem that data acquisition device runout produced interference, measuring result is accurate.

3. Contact auto wheel side wall deformation detecting system realize the dynamic short-term test to the outer side wall of auto wheel to the use state that the side wall was measured to the protruding degree after deformation in the measurement side wall actual motion is more effective.

4. Contact auto wheel side wall deformation detecting system through the deformation degree of judging the side wall, can judge whether the tire has the danger that takes place to blow out or whether the tire atmospheric pressure is not enough, evade the risk for the navigating mate, provide the safety guarantee.

Drawings

FIG. 1 is a schematic view of a contact type measuring device of a sidewall deformation detecting system for a vehicle wheel according to the present invention;

fig. 2 is an isometric view of a contact type measuring device of a sidewall deformation detecting system for a vehicle wheel according to the present invention;

fig. 3 is an isometric view of a rail housing according to the present invention;

fig. 4 is an isometric view of a rail block according to the present invention;

fig. 5 is an isometric view of a bearing guide shaft and rail platform according to the present invention;

fig. 6 is an isometric view of a sport sleeve according to the present invention;

FIG. 7 is an isometric view of a retaining member according to the present invention;

FIG. 8 is a top view of the retaining member of the present invention;

FIG. 9 is an isometric view of a retaining member back plate according to the present invention;

FIG. 10 is an isometric view of a retaining member front plate according to the present invention;

fig. 11 is an isometric view of a retaining plate for a retaining member in accordance with the present invention;

FIG. 12 is an isometric view of a retaining member handle according to the present invention;

fig. 13 is an isometric view of a web according to the present invention;

fig. 14 is an isometric view of an assembly of a detection cartridge, a slide bar, a guide bar, a displacement sensor, a zero adjustment nut, an end cap, and a universal wheel according to the present invention;

FIG. 15 is an assembly view of the internal structure of the test cartridge of the present invention;

fig. 16 is an isometric view of a test cartridge according to the present invention;

fig. 17 is an isometric view of a slide bar according to the present invention;

fig. 18 is an isometric view of a guide bar according to the present invention;

fig. 19 is an isometric view of a displacement sensor according to the present invention;

fig. 20 is an isometric view of a zero nut according to the present invention;

fig. 21 is an isometric view of an end cap according to the present invention;

fig. 22 is an isometric view of a universal wheel according to the present invention;

FIG. 23 is a schematic view of the structural connection of the contact type detecting system for sidewall deformation of a vehicle wheel according to the present invention;

fig. 24 is a logic judgment flowchart of the contact type automobile wheel sidewall deformation detection system of the present invention.

In the figure: 1. the device comprises a roller test bed, 2 parts of a guide rail seat, 3 parts of an optical axis, 4 parts of a guide rail sliding block, 5 parts of a guide rail platform, 6 parts of a guide bearing shaft, 7 parts of a moving sleeve, 8 parts of a locking piece rear plate, 9 parts of a locking piece front plate, 10 parts of a locking piece fixing plate, 11 parts of a locking piece handle, 12 parts of a locking piece bolt, 13 parts of a connecting plate, 14 parts of a compression spring, 15 parts of a detection cylinder, 16 parts of a sliding rod, 17 parts of a guide rod, 18 parts of a displacement sensor, 19 parts of a zero adjusting nut, 20 parts of an end cover, 21 parts of a universal wheel, 22 parts of a human-computer terminal HMI (human machine.

Detailed Description

The invention will be further explained with reference to fig. 1 to 24:

the technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. The following examples are presented only for the purpose of further understanding and implementing the technical solutions of the present invention, and do not constitute a further limitation of the claims of the present invention, therefore. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, if terms are involved, such as: the directional or positional relationships indicated by "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directional or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or part (element) referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; the two elements can be directly connected or indirectly connected through an intermediate medium, and the two elements can be communicated with each other internally, and can be flexibly connected, rigidly connected or movably connected. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Contact auto wheel side wall deformation detecting system includes: the device comprises a roller test bed 1, a guide rail seat 2, an optical axis 3, a guide rail slider 4, a guide rail platform 5, a guide bearing shaft 6, a moving sleeve 7, a locking part rear plate 8, a locking part front plate 9, a locking part fixing plate 10, a locking part handle 11, a locking part bolt 12, a connecting plate 13, a compression spring 14, a detection cylinder 15, a sliding rod 16, a guide rod 17, a displacement sensor 18, a zero setting nut 19, an end cover 20, a universal wheel 21, a human-machine HMI terminal 22, a PLC main controller 23 and an alarm 24.

The roller test bed 1 is a rectangular platform built on the ground surface, consists of a motor, a driver, a small-diameter roller and a test platform, and is used for simulating a road surface and driving wheels to rotate. The guide rail seat 2 is made of a rectangular steel plate, 4 round through holes used for fixing are machined in four corners of the surface of the guide rail seat, 4 bosses are symmetrically arranged at two ends of the guide rail seat, a round through hole with a notch is machined in the middle of each boss, and a round through hole for a bolt to pass through is machined in a side plane of each boss and used for locking. The guide rail seat 2 is horizontally arranged on the surface of a test platform of the roller test bed 1, and the guide rail seat 2 is fixed on the roller test bed 1 through bolt connection. The optical axis 3 is a solid linear cylinder made of bearing steel. The guide rail slide block 4 is a standard slide block with a clamp, and can be positioned at any position. 2 optical axis 3 pass through the through-hole that has the breach on the guide rail seat 2 and the through-hole on 4 guide rail slide blocks 4, through bolted connection fastening breach position, make optical axis 3 fix on guide rail seat 2. The guide rail platform 5 is made of a rectangular steel plate, and a circular through hole for a bolt to pass through is formed in the surface of the guide rail platform. The end face of the guide rail sliding block 4 with the circular through hole faces upwards, and the guide rail platform 5 is fixedly connected with the 4 guide rail sliding blocks 4 through bolts. The bearing guide shaft 6 is a cylindrical part, the bottom of the bearing guide shaft is provided with a base with a circular through hole, the surface of the cylinder is symmetrically provided with two longitudinal grooves of the similar cuboid and two longitudinal grooves of the similar prismatic table with cross sections, the longitudinal grooves of the similar cuboid are used for guiding, and the longitudinal grooves of the similar prismatic table are used for positioning. The guide shaft 6 is horizontally placed on the guide rail platform 5, the orientation of a longitudinal groove of the guide shaft is parallel to the

optical axis

3, 4 bolts penetrate through a circular through hole in a base of the guide shaft 6 and a circular through hole in the guide rail platform 5, and the guide shaft 6 is vertically fixed on the guide rail platform 5 through bolt connection. The motion sleeve 7 is made of a round steel cylinder and a rectangular steel plate, and a ribbed plate is processed at the joint of the round steel cylinder and the rectangular steel plate. The inner wall of the steel cylinder is symmetrically provided with two longitudinal convex ridges similar to cuboids for guiding. Two rectangular through holes are symmetrically processed on the surface of the steel cylinder and used for positioning. And two lifting lugs with circular through holes are symmetrically arranged on the surface of the steel cylinder on the same plane with the longitudinal convex ridge. Two circular through holes are processed at the front end of the rectangular steel plate. The motion sleeve 7 is sleeved on the bearing and guide shaft 6, and the rectangular plane of the longitudinal similar cuboid ridge in the motion sleeve 7 is in surface contact with the rectangular plane of the longitudinal similar cuboid groove in the bearing and guide shaft 6. The locking part bolt 12 is made of round steel, both ends of which are processed with screw threads, and the middle of which is a polished rod. Retaining member backplate 8 is made for the rectangle steel sheet, and middle processing has vertical terrace with edge, and both ends symmetry processing has 4 circular through-holes. 4 retaining member bolts 12 pass the circular through-hole on the

motion sleeve

7, 8 prismoids of retaining member back plate face towards the rectangle through-hole on the

motion sleeve

7, and 8 nuts are fixed retaining member back plate 8 in the one end of retaining member bolt 12. Retaining member front bezel 9 is made for the rectangle steel sheet, and the processing has vertical terrace with edge in the middle of the surface of one side, and opposite side facing has hollow boss, and the boss center is provided with the circular through-hole of a major diameter, and the processing of steel sheet both ends has 4 circular through-holes. The locking element front plate 9 is prismatically facing towards the rectangular through hole in the movement sleeve 7, so that 4 locking element bolts 12 pass through the circular through holes in it. Retaining member fixed plate 10 is made for the rectangle steel sheet, and the centre is provided with circular boss, and boss center processing has the screw hole, and steel sheet both ends processing has 4 circular through-holes. The 8 nuts fix the locker fixing plate 10 at the other end of the locker bolt 12. The locking piece handle 11 is a T-shaped part and is machined from bar steel and a threaded rod. The retaining member handle 11 is screwed into a threaded hole in the retaining member fixing plate 10 and penetrates through a large-diameter circular through hole in the retaining member front plate 9, a threaded end of the retaining member handle 11 is screwed by a nut, a washer is sleeved on the threaded end of the retaining member handle 11, the nut is screwed with the threaded end of the retaining member handle 11, the washer is fixed on a threaded rod of the retaining member handle 11, the inner side nut can penetrate through the large-diameter circular through hole in the middle of the retaining member front plate 9, and the used washer is slightly larger than the large-diameter circular through hole in the retaining member front plate 9 in diameter. The connecting plate 13 is a part made of a rectangular steel plate, and two circular through holes are respectively processed on the upper plate surface and the lower plate surface. The detection cylinder 15 is a part made of a round steel cylinder, a thread is machined on the inner surface of one end of the detection cylinder, and 4 threaded holes are machined in the end face of the other end of the detection cylinder. 4 rectangular through holes are processed on the outer surface of the steel cylinder at equal intervals around the axis of the steel cylinder and used for guiding. Near the end of the threaded hole, the upper surface of the steel cylinder is provided with two bosses with threaded holes, and the side surface of the steel cylinder is provided with two bosses with arc-shaped grooves and threaded holes. One end of the connecting plate 13 is fixed with the front end of the rectangular plate of the moving sleeve 7 through bolt connection, and the other end of the connecting plate is fixed with the detection cylinder 15 through thread connection. The compression spring 14 is a cylindrical helical compression spring. The slide bar 16 is a part made of round steel, a disc and a short cylinder by welding. And external threads are respectively processed at one end of the round steel and one end of the cylinder. 4 symmetrical arc-shaped through holes are milled in the side face of the disc, and 4 threaded holes are machined in the outer ring. The end cover 20 is a disc-shaped part made of a steel plate, 4 circular through holes are symmetrically processed on the surface of the disc-shaped part, a circular boss is welded at the center of the disc-shaped part, and a circular through hole for the sliding rod 16 to pass through is processed at the center of the boss. One end of the compression spring 14 enters from the unthreaded end of the sliding rod 16, is sleeved on a cylinder in the middle of the sliding rod 16 and is welded with a disk surface in the middle, the sliding rod 16 penetrates through a circular through hole in the end cover 20, and the other end of the compression spring 14 is sleeved on a cylindrical boss in the middle of the end cover 20 and is welded with the end cover 20. The zero setting nut 19 is a special-shaped nut, one end of the zero setting nut is hexagonal, the other end of the zero setting nut is provided with an external thread, and a circular through hole is formed in the center of the zero setting nut. A large diameter nut is screwed into the screw thread on the middle disc side of the slide bar 16 to block the zero adjustment nut 19. The partially assembled slide rod 16 is inserted into the

detection cylinder

15, 4 screws are screwed into the threaded holes in the end cover 20 through the circular through holes in the end cover 20, and the end cover 20 is fixed on the detection cylinder 15 through threaded connection. The zero setting nut 19 is sleeved from the threaded end of the sliding rod 16 and screwed into the internal thread of the detection cylinder 15. The universal wheel 21 is a universal ball wheel and can rotate at any angle. The screw hole of the universal wheel 21 is screwed with the external thread of the screw end of the slide bar 16, and the universal wheel 21 and the slide bar 16 are fixed together. The guide bar 17 is the part that round steel strip and steel sheet were made, and it has 4 to process altogether, and wherein 3 only have the external screw thread for round steel strip one end processing, and 1 has external screw thread and other end welding to have the steel sheet for round steel strip one end processing in addition, plays the effect of blockking. 3

common guide rods

17 and 1 guide rod 17 with a baffle pass through the rectangular through hole on the detection cylinder 15 and are screwed into the threaded hole on the disk at the middle position of the sliding rod 16. The displacement sensor 18 is a direct current rebound type LVDT displacement sensor, and has the advantages of being sensitive to axial movement and insensitive to radial movement. The displacement sensor 18 is fixed in an arc-shaped groove on the side surface of the detection cylinder 15 through threaded connection, and a contact probe of the displacement sensor is pressed against a stop piece of the guide rod 17. The PLC main controller 23 (Siemens S7-200 PLC controller is selected) is composed of a PLC-Base, a PLC power supply, a PLC CPU, a PLC input module, a PLC output module, a PLC servo module, a PLC signal module, a PLC CP module, a PLC IM module and other basic parts. The human-machine HMI terminal 22 selects GP-4301TM type touch screen products produced by PROFACE. The alarm 24 is an LED type sound and light alarm, and emits light and sounds when energized. The displacement sensor 18 is connected with a PLC main controller 23 through a signal line, the PLC main controller 23 is connected with a driver of the roller test bed 1 through a signal line, the PLC main controller 23 is connected with a human-machine HMI terminal 22 through a PCI bus, and the alarm 24 is connected with the PLC main controller 23 through a signal line.

The working principle and the use method of the contact type automobile wheel sidewall deformation detection system are as follows:

after being straightened, the automobile body to be tested is fixed on a test platform of the roller test bed 1, so that the wheel to be tested is positioned on a roller of the roller test bed 1. The horizontal position of the guide rail platform 5 on the optical axis 3 is adjusted, and the position is fixed by a clamp on the guide rail sliding block 4. The vertical position of the movement sleeve 7 is adjusted so that the universal wheel 21 is located at half the height of the wheel. Clockwise rotation retaining member handle 11 makes the screw rod end top on retaining member front bezel 9 and promote retaining member front bezel 9 and be close to motion sleeve 7, and the rectangle through-hole on motion sleeve 7 is passed to vertical terrace with edge on retaining member rear bezel 8 and the retaining member front bezel 9, and the cross-section that leads on the axle 6 with bearing is the vertical groove meshing of class terrace with edge, utilizes the extrusion force on vertical groove both sides inclined plane to realize the auto-lock location. The zero adjusting nut 19 is rotated to enable the universal wheel 21 to contact the tire side and the pressure is proper, and the position is used as an ideal initial sampling point position where the tire side is not deformed. And operating the human-machine HMI terminal 22 to start a detection program, sending a data acquisition instruction to the PLC main controller 23 by the human-machine HMI terminal 22, converting an analog signal output by the displacement sensor 18 into a digital signal by the PLC main controller 23 and transmitting the digital signal to the human-machine HMI terminal 22, and storing the numerical value acquired at the moment as data of an initial sampling point by the human-machine HMI terminal 22. And the positions of the guide rail platform 5 and the universal wheel 21 are readjusted and fixed, so that the universal wheel 21 is contacted with the tire side at a close place above the contact point of the wheel and the roller, and the human-machine HMI terminal 22 is operated to control the roller on the roller test bed 1 to drive the wheel to rotate. Man-machine HMI terminal 22 sends the instruction to PLC main control unit 23, PLC main control unit 23 receives the instruction and communicates with the driver of cylinder test bench 1, the driver sends pulse signal to the motor, the motor rotates and the driving roller rotates, the cylinder drives the wheel and rotates, because universal wheel 21 can only transmit single direction movement here, it receives protruding extrusion behind the side wall deformation to make slide bar 16 do concertina movement, axial displacement volume is measured in step to the displacement sensor 18 that can kick-back, PLC main control unit 23 gathers displacement sensor 18 according to the data of predetermineeing the sampling frequency transmission in succession, man-machine HMI terminal 22 is with all sampling point data storage. When the wheel rotates for a circle and deformation data of the tire side for a circle are acquired, the human-machine HMI terminal 22 is operated to stop the rotation of the roller. The human-machine HMI terminal 22 processes the data. The ith sample point data Li is compared with the initial sample point data L0, and if the ith sample point data Li is smaller than L0, the ith sample point data Li is discarded. Next, counting the number of effective sampling points, and calculating a difference Ki, namely a difference between the sidewall deformation amount and the sidewall deformation critical threshold, wherein the sidewall deformation amount is represented by subtracting the initial sampling point data value L0 from the ith sampling point data Li, and H0 is a preset sidewall deformation critical threshold. And next, counting the number M of the sidewall deformation variables larger than the critical threshold in the effective sampling points. If the data value of the effective sampling point does not exceed the critical threshold value of the deformation amount, the tire side deformation is considered to be normal, the tire is not dangerous, the alarm 24 does not respond, and the human-computer HMI terminal 22 interface displays the prompt that the tire side deformation is normal. If the effective sampling point value is larger than the critical threshold value, judging whether the ratio of the number M exceeding the critical threshold value to the total number N of the effective sampling points exceeds eighty percent: if the deformation quantity of the sampling point exceeds the preset deformation quantity, the deformation quantity of most sampling points is too large, namely the tire pressure is considered to be caused by too low, at the moment, the human-machine HMI terminal 22 controls the PLC main controller 23 to be connected with a circuit of the alarm 24, a lamp of the alarm 24 flickers and gives an alarm sound, and meanwhile, the human-machine HMI terminal 22 displays the prompt of abnormal tire pressure on the interface; if not, think the side wall deformation volume is too big, the side wall is dangerous, and the siren 24 lamp scintillation and the warning sound of giving out an alarm sound, and the suggestion of the dangerous suggestion of side wall is shown in the human-computer HMI terminal 22 interface simultaneously. According to the detection result of the contact type automobile wheel sidewall deformation detection system, whether the tire is replaced or not is determined, and possible dangers are avoided.

While embodiments of the invention have been disclosed above, it is not intended to be limited to the applications listed in the specification and the examples. It can be applicable to various and be fit for the utility model discloses a field completely. Additional modifications will readily occur to those skilled in the art. The invention is therefore not to be limited to the specific details and illustrations shown and described herein, without departing from the general concept defined by the claims and their equivalents.

Claims

1. A contact type automobile wheel side wall deformation detection system comprises: the roller test bed is used for simulating a road surface and driving wheels to rotate and is characterized in that the roller test bed comprises a roller test bed, a guide rail seat, a guide rail platform, a guide bearing shaft, a detection cylinder, a human-machine HMI terminal, a PLC main controller and an alarm,

the bearing guide shaft is fixedly installed on the guide rail platform through a base, the guide rail platform is installed on the guide rail seat through an optical axis in a sliding mode, the guide rail seat is horizontally fixed on a roller test bed, the detection cylinder is sleeved on the bearing guide shaft through a connecting plate and a motion sleeve, a sliding rod is installed at one end of the detection cylinder, a universal wheel is installed at the end part of the sliding rod, a displacement sensor is installed on the side wall of the detection cylinder, and the position of the detection cylinder is adjustable: the sliding rod can extend and retract in the detection cylinder, and the position can be adjusted singly or in a combined manner; the displacement sensor is connected with the PLC main controller through a signal line, the PLC main controller is connected with a driver of the roller test bed through a signal line, the PLC main controller is connected with the human-machine HMI terminal through a PCI bus, and the alarm is connected with the PLC main controller through a signal line.

2. The contact type automobile wheel sidewall deformation detection system as claimed in claim 1,

the bottom of the guide rail platform is provided with a guide rail sliding block, the guide rail sliding block is sleeved on an optical axis, the guide rail seat is composed of bosses fixed on four corners of a rectangular steel plate, and the optical axis is arranged in a circular through hole with a notch in the middle of the boss and is locked by a bolt in the circular through hole at the notch of the side plane; the bearing guide shaft is a cylinder, the base with a circular through hole at the bottom is fixed on the guide rail platform, two longitudinal grooves of the similar cuboid and two longitudinal grooves of the similar prismatic table with the cross sections are symmetrically arranged on the surface of the cylinder, the longitudinal grooves of the similar cuboid are used for guiding, and the longitudinal grooves of the similar prismatic table are used for positioning.

3. The contact type automobile wheel sidewall deformation detection system as claimed in claim 1 or 2,

the motion sleeve pipe comprises circular steel cylinder and rectangle steel sheet, and the junction is consolidated through the floor, and steel cylinder inner wall symmetry is provided with the vertical convex ridge of two class cuboids, with the cylinder on the surface two class cuboid longitudinal groove sliding fit, steel cylinder surface symmetry is equipped with two rectangle through-holes, with retaining member cooperation location, steel cylinder surface symmetry is provided with two lugs that have circular through-hole, and rectangle steel sheet front end processing has two circular through-holes for with connecting plate bolted connection.

4. The contact type automobile wheel sidewall deformation detection system as claimed in claim 3,

the retaining member, comprising: retaining member back plate, retaining member front bezel, retaining member fixed plate, retaining member handle and retaining member bolt, retaining member bolt both ends are equipped with the screw thread, lug round hole sliding fit assembly on middle polished rod and the motion sleeve pipe, retaining member back plate, retaining member front bezel and retaining member fixed plate suit are on the retaining member bolt, retaining member back plate and retaining member fixed plate pass through the nut to be fixed at retaining member bolt both ends, retaining member back plate and retaining member front bezel internal surface symmetry are equipped with vertical terrace with edge, and this vertical terrace with edge cooperatees with the rectangular through hole on the motion sleeve pipe, the processing of retaining member front bezel opposite side surface has hollow boss, and the boss center is provided with the circular through-hole in major diameter, be provided with circular boss in the middle of the retaining member fixed plate.

5. The contact type automobile wheel sidewall deformation detection system as claimed in claim 4,

the retaining member handle is T-shaped piece, the threaded hole screw assembly on its threaded rod and the retaining member fixed plate to pass the circular through-hole in major diameter on the retaining member front bezel, it is fixed to be greater than the packing ring locking of the circular through-hole diameter on the retaining member front bezel through two nuts, drive the retaining member front bezel through rotatory handle and remove along the retaining member bolt, make vertical terrace with edge on retaining member rear plate and the retaining member front bezel pass the rectangle through-hole on the motion sleeve pipe, with the vertical groove meshing that the epaxial cross-section of bearing is like terrace with edge, utilize the extrusion force on vertical groove both sides inclined plane to realize self-locking location.

6. The contact type automobile wheel sidewall deformation detection system as claimed in claim 1,

the detection cylinder is sleeved on the sliding rod, two ends of the detection cylinder are respectively provided with a zero adjusting nut and an end cover, 4 rectangular through holes are longitudinally and uniformly distributed on the surface of the detection cylinder, the upper surface of the detection cylinder is connected with the connecting plate through a boss with a threaded hole, and the side surface of the detection cylinder is fixed with the displacement sensor through the boss with a threaded hole; the sliding rod is formed by welding round steel, a disc and a short cylinder, arc-shaped through holes are symmetrically formed in the side face of the disc, a guide rod which is matched and positioned with the longitudinal rectangular through hole in the surface of the detection cylinder is arranged on the outer surface of the disc, a compression spring is sleeved on the sliding rod between the disc and the end cover, and two ends of the compression spring are fixed on the disc and the end cover; the zero setting nut and the end cover are connected with the detection cylinder through threads and bolts respectively and are connected with the sliding rod in a sliding fit mode, and the zero setting nut is used for adjusting the sliding rod to move so that the universal wheel is in contact with the side face of the wheel.

7. The contact type automobile wheel sidewall deformation detection system as claimed in claim 6,

the universal wheel is a universal ball wheel and is in threaded connection with the sliding rod; the guide rod is contacted with a contact probe at one end of the displacement sensor through a steel sheet; the displacement sensor is a direct current rebound type LVDT displacement sensor.

8. The contact type automobile wheel sidewall deformation detection system as claimed in claim 1,

the PLC main controller is a Siemens S7-200 PLC controller.

9. The contact type automobile wheel sidewall deformation detection system as claimed in claim 1,

the human-computer HMI terminal selects GP-4301TM type touch screen products produced by PROFACE; the alarm is an LED type acousto-optic alarm which emits light and sounds after being electrified.