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CN111189651A - Solid tire performance testing device - Google Patents

Solid tire performance testing device Download PDF

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Publication number
CN111189651A
CN111189651A CN202010137906.3A CN202010137906A CN111189651A CN 111189651 A CN111189651 A CN 111189651A CN 202010137906 A CN202010137906 A CN 202010137906A CN 111189651 A CN111189651 A CN 111189651A
Authority
CN
China
Prior art keywords
solid
rotating shaft
tire
driven roller
solid tire
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202010137906.3A
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Chinese (zh)
Inventor
邓克文
郭珍
马文良
秦柳
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ningbo Gmf Technology Co ltd
Original Assignee
Ningbo Gmf Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ningbo Gmf Technology Co ltd filed Critical Ningbo Gmf Technology Co ltd
Priority to CN202010137906.3A priority Critical patent/CN111189651A/en
Publication of CN111189651A publication Critical patent/CN111189651A/en
Pending legal-status Critical Current

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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M17/00Testing of vehicles
    • G01M17/007Wheeled or endless-tracked vehicles
    • G01M17/02Tyres

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Tires In General (AREA)

Abstract

The invention discloses a solid tire performance testing device which comprises a power mechanism, a driving rotating shaft driven by the power mechanism, a tire fixing assembly used for axially fixing a solid tire and a pressure mechanism used for providing testing pressure for the solid tire, wherein the driving rotating shaft is provided with the tire fixing assembly, the pressure mechanism comprises a lifting assembly, and a driven roller opposite to the solid tire is detachably arranged on the lifting assembly. The solid tyre is fixed on the driving rotating shaft through the tyre fixing component, the lifting component pushes the driven roller to enable the driven roller to be in certain pressure contact with the outer surface of the solid tyre, the driving rotating shaft is driven by the power mechanism to drive the solid tyre to rotate, the driven roller is driven by the solid tyre to rotate under the action of pressure, the position of the driven roller can be adjusted according to the position of the solid tyre, the center of the driven roller is overlapped with the center of the solid tyre, the solid tyre is stressed more uniformly, and performance test can be carried out on the solid tyres made of different materials and different specifications.

Description

Solid tire performance testing device
Technical Field
The invention relates to the technical field of test equipment, in particular to a solid tire performance test device.
Background
The solid tyre is a new type tyre, its tyre body is solid, compared with pneumatic tyre, it has the advantages of puncture-free, explosion-proof, low permanent deformation and good wear resistance. However, for solid tires made of different materials, corresponding performance detection indexes need to be made according to the characteristics of the solid tires, so that the specific application field of the solid tires can be determined.
The performance test of the tire generally comprises several aspects of tensile strength, hardness, durability, high-speed performance, appearance quality and the like. On the basis of common performance tests, the solid tire needs to measure whether the structure has enough pressure resistance and wear resistance, permanent deformation of the appearance and the like. In addition, the most critical mileage test is one of the requirements of each tire factory to pass the tire product certification at present. Along with the increase of the driving mileage, the inside of the tire can generate corresponding heat, and along with the rise of the temperature, the partial performance of the tire material can be influenced to be in a descending trend, and after the inside temperature reaches the limit temperature for manufacturing the tire material, the material structure can be damaged, so that the service life of the tire is shortened, and the whole structure of the tire is greatly damaged. Therefore, by using the mileage experiment, the influence of factors such as the speed and the load of the tire in a rolling state on the heat generation in the tire can be obtained, so that the performance parameters of the tire material in a working state can be further mastered, and whether the practicability of the material in the tire industry can meet the standard requirement of the tire industry can be investigated.
At present, a pressure applying mechanism in the existing solid tire testing device cannot well realize accurate alignment with a solid tire, so that the testing precision of the solid tire needs to be improved.
Disclosure of Invention
In order to solve the technical defects, the technical scheme adopted by the invention is that the solid tire performance testing device comprises a power mechanism, a driving rotating shaft driven by the power mechanism, a tire fixing assembly used for axially fixing the solid tire and a pressure mechanism used for providing testing pressure for the solid tire, wherein the pressure mechanism comprises a lifting assembly, and a driven roller arranged opposite to the solid tire is arranged on the lifting assembly.
Further, the tire fixing assembly comprises a first limiting ring and a second limiting ring which are coaxially mounted on the driving rotating shaft, and a gap is reserved between the first limiting ring and the second limiting ring.
Furthermore, a first positioning ring and a second positioning ring which are coaxially arranged on the driving rotating shaft are arranged in the gap, and a solid tire is axially fixed between the first positioning ring and the second positioning ring.
Furthermore, the lifting assembly is a turbine spiral lifter, a positioning plate is mounted on the turbine spiral lifter, and the driven roller is rotatably mounted on the positioning plate.
Furthermore, two ends of the driven roller are rotatably installed on the positioning plate through roller bearing seats, and the roller bearing seats are slidably installed on the positioning plate.
Further, a pressure sensor is arranged between the turbine spiral lifter and the positioning plate.
Furthermore, the power mechanism comprises a motor, and an output shaft of the motor is in transmission connection with the driving rotating shaft through a belt and a belt wheel.
Further, still include the bottom frame, the lifting unit slidable mounting is on the bottom frame, initiative pivot is rotated and is installed on the bottom frame.
Furthermore, at least one support column is vertically arranged on the bottom frame, a rotating shaft bearing seat is installed on each support column, and the driving rotating shaft is rotatably installed on the rotating shaft bearing seat.
Further, be equipped with first sliding part on the roller bearing frame, be equipped with first direction slide on the locating plate, first sliding part slides with first direction slide and sets up, just be equipped with first retaining member on the first sliding part.
Compared with the prior art, the technical scheme of the invention has the beneficial effects that:
1. according to the solid tire performance testing device provided by the invention, the solid tire is fixed on the driving rotating shaft through the tire fixing component, the lifting component pushes the driven roller to keep a certain pressure contact with the outer surface of the solid tire, the driving rotating shaft is driven by the power mechanism to drive the solid tire to rotate, the driven roller is driven by the solid tire to rotate under the action of the pressure, the position of the driven roller can be adjusted according to the position of the solid tire, the center of the driven roller is overlapped with the center of the solid tire, the stress condition of the solid tire can be accurately determined, and the performance testing can be carried out on the solid tires made of different materials and different specifications.
2. Adopt two spacing rings to tentatively fix a position solid tyre's position to through setting up two holding ring centre gripping solid tyre, the accessible is adjusted the distance between two holding rings and is satisfied the installation of different specification tires, can also the efficient assemble the test to the solid tyre who does not install wheel hub, also can install the test to the tire that the quality is lighter, have high resilience characteristic material and make.
3. The pressure between the driven roller on the positioning plate and the solid tire is adjusted through the turbine spiral lifter, so that the pressure applied to the solid tire is more accurate, and the applied pressure and the applied rotating speed can be adjusted simultaneously according to requirements, so that the wear resistance of the tire can be measured; with roller bearing frame slidable mounting on the locating plate for driven roller bearing can follow first direction slide translation, and the driven roller bearing of being convenient for aligns with realization tire central point, prevents that solid tyre atress is inhomogeneous, further improves the precision of test, and shows the pressure value of driven roller bearing to solid tyre through pressure sensor, just stops promoting driven roller bearing when reaching the settlement pressure value.
4. The lifting assembly is slidably mounted on the bottom frame, so that coarse adjustment can be conveniently carried out on the position between the driven roller and the solid tire, the tire specification in a wider range can be adapted, and the mounting efficiency of the solid tire can be improved; the active rotating shaft is convenient to install and align through the rotating shaft bearing seat on the supporting column.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a solid tire performance testing apparatus according to an embodiment of the present invention;
FIG. 2 is a perspective view of a solid tire performance testing apparatus according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a bottom frame and a supporting pillar according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a lifting mechanism provided in an embodiment of the present invention;
fig. 5 is a schematic structural diagram of power transmission of the power mechanism according to the embodiment of the invention;
FIG. 6 is a schematic structural view of a tire securing assembly provided in accordance with an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a driven roller according to an embodiment of the present invention.
Wherein the reference numerals are:
1. the tire fixing device comprises a power mechanism, 2, a driving rotating shaft, 3, a tire fixing component, 4, a pressure mechanism, 5, a lifting component, 6, a driven roller, 7, a first limiting ring, 8, a second limiting ring, 9, a first positioning ring, 10, a second positioning ring, 11, a positioning plate, 11a, a first guide slideway, 12, a roller bearing seat, 13, a pressure sensor, 14, a bottom frame, 14a, a second guide slideway, 14b, a third guide slideway, 15, a supporting column, 16, a rotating shaft bearing seat, 17, a protective cover, 18, a second sliding part, 19, a sliding plate, 20 and a welding plate.
Detailed Description
The invention is further described with reference to the following figures and specific examples.
Example 1
Referring to fig. 1 to 7, the solid tire performance testing apparatus provided by the present invention includes a power mechanism 1, a driving shaft 2 driven by the power mechanism 1, a tire fixing assembly 3 for axially fixing the solid tire is disposed on the driving shaft 2, and a pressure mechanism 4 for providing a testing pressure to the solid tire, wherein the pressure mechanism 4 includes a lifting assembly 5, and a driven roller 6 disposed opposite to the solid tire is detachably disposed on the lifting assembly 5. Preferably, the outer surface of the driven roller 6 is concave in the middle and has two ends protruding, so as to better fit with the outer surface of the solid tire.
The solid tyre is fixed on the driving rotating shaft 2 through the tyre fixing component 3, the lifting component 5 pushes the driven roller 6 to keep a certain pressure contact with the outer surface of the solid tyre, the driving rotating shaft 2 is driven by the power mechanism 1 to drive the solid tyre to rotate, the driven roller 6 is driven by the solid tyre to rotate under the action of pressure, the position of the driven roller 6 can be adjusted according to the position of the solid tyre, the center of the driven roller 6 is overlapped with the center of the solid tyre, the stress condition of the solid tyre can be accurately determined, and the solid tyre made of different materials and different specifications can be subjected to performance test.
As shown in fig. 5, the power mechanism 1 includes a motor, and an output shaft of the motor is in transmission connection with the driving rotating shaft 2 through a belt and a belt wheel. The motor is a speed-adjustable motor, and the rotating speed of the transmission of the power mechanism 1 can be adjusted according to the output power and the transmission ratio of the motor.
Preferably, an output shaft of the motor is provided with a first V-shaped belt pulley, one end of the driving rotating shaft 2 is provided with a second V-shaped belt pulley, and the first V-shaped belt pulley and the second V-shaped belt pulley are in transmission connection through a V-shaped belt. The first V-shaped belt wheel, the V-shaped belt and the second V-shaped belt wheel are packaged in the protective cover 17, so that foreign matters can be effectively prevented from entering the belt wheels, and unsafe factors are introduced into the testing device.
The tire fixing component 3 comprises a first limiting ring 7 and a second limiting ring 8 which are coaxially arranged on the driving rotating shaft 2, and a gap is reserved between the first limiting ring 7 and the second limiting ring 8. A first positioning ring 9 and a second positioning ring 10 which are coaxially arranged on the driving rotating shaft 2 are arranged in the gap, and the solid tire is sleeved on the driving rotating shaft 2 and is clamped and fixed between the first positioning ring 9 and the second positioning ring 10 along the axial direction.
Adopt two spacing rings to tentatively fix a position solid tyre's position to through setting up two holding ring centre gripping solid tyre, the accessible is adjusted the distance between two holding rings and is satisfied the installation of different specification tires, can also the efficient assemble the test to the solid tyre who does not install wheel hub, also can install the test to the tire that the quality is lighter, have high resilience characteristic material and make.
Preferably, the first limiting ring 7 and the second limiting ring 8 are bushing rings, and the first positioning ring 9 and the second positioning ring 10 are tire clamping rings.
The solid tire mounting steps are as follows: the two shaft sleeve rings, the two tire clamping rings and the solid tire are respectively sleeved on the driving rotating shaft 2, the two tire clamping rings and the two sides of the solid tire are respectively fixed by fasteners, the two tire clamping rings and the driving rotating shaft 2 are installed in a matched mode through keys and grooves, a long strip-shaped groove extending to one end is formed in the driving rotating shaft 2, a hole is formed in the middle of each tire clamping ring, and a key is installed in the hole wall.
The device is characterized by further comprising a bottom frame 14, the lifting assembly 5 is slidably mounted on the bottom frame 14, the driving rotating shaft 2 is rotatably mounted on the bottom frame 14, and pulleys are further arranged on the bottom frame 14, so that the whole movement of the testing device is facilitated. The bottom frame 14 is provided with a second guide slideway 14a, the lifting assembly 5 is provided with a second sliding part 18, the second sliding part 18 is matched with the second guide slideway 14a in a sliding manner, and the second sliding part 18 is provided with a second locking part, so that coarse adjustment can be conveniently carried out on the position between the driven roller 6 and the solid tire, the driven roller and the solid tire are aligned to adapt to the tire specification in a wider range, and the mounting efficiency of the solid tire is improved; meanwhile, the lifting component 5 is fixed and locked after being adjusted, so that the influence of the deviation of the position of the driven roller 6 on the testing precision is avoided in the testing process.
Preferably, the lower end of the lifting assembly 5 is provided with a sliding plate 19, the lower end of the sliding plate 19 is provided with a second sliding part 18, the second sliding part 18 is a sliding rail or a sliding column or a bolt, and is provided with 4, and the second locking parts are locking screws or locking nuts and are installed in a one-to-one matching manner with the second sliding parts 18; the second guide slideway 14a is a strip-shaped hole or a strip-shaped groove, and is provided with four holes.
The lifting component 5 is a turbine spiral lifter, a positioning plate 11 is arranged on the turbine spiral lifter, and the driven roller 6 is rotatably arranged on the positioning plate 11. The both ends of driven roller 6 are passed through roller bearing frame 12 and are rotated and install on locating plate 11, roller bearing frame 12 slidable mounting is on locating plate 11, be equipped with first sliding part on the roller bearing frame 12, be equipped with first direction slide 11a on the locating plate 11, first sliding part slides with first direction slide 11a cooperation and sets up, be equipped with first retaining member on the first sliding part, be convenient for adjust driven roller 6's position after-fixing locking, further avoid the precision that the skew influences the test to take place for the position of driven roller 6 among the process of test. Wherein, first direction slide 11a is bar hole or bar groove, is equipped with four, and the lower extreme of roller bearing frame 12 is equipped with and cooperates gliding slide rail or traveller or bolt with first direction slide 11a, and first retaining member is locking screw or lock nut, matches the installation with the sliding part one by one.
Preferably, a pressure sensor 13 is arranged between the turbine screw elevator and the positioning plate 11 and used for detecting the local pressure on the solid tyre. The pressure sensor 13 is a cylindrical force sensor and is matched with a turbine spiral lifter for use, so that the pressure applied to the solid tire can be accurately determined, and the applied pressure and the applied rotating speed can be simultaneously adjusted as required, so that the abrasion resistance of the tire under different loads can be measured; the position between the driven roller 6 and the solid tire is finely adjusted by adjusting the sliding of the roller bearing housing 12 along the first guide slideway 11a, so as to adapt to a wider range of tire specifications and further improve the mounting accuracy of the tire.
At least one supporting column 15 is vertically arranged on the bottom frame 14, a rotating shaft bearing seat 17 is installed on each supporting column 15, and the driving rotating shaft 2 is rotatably installed on a rotating shaft bearing seat 16. Wherein, support column 15 is three, and one of them support column 15 is located the one end of initiative pivot 2, and this support column 15 slidable mounting is on bottom frame 14, and two other support columns 15 are fixed and are located the other end of initiative pivot 2, conveniently carry out the dismouting to solid tyre, have improved testing arrangement's stability.
Preferably, the bottom frame 14 is further provided with two third guide slideways 14b, and the third guide slideways 14b are strip-shaped grooves or strip-shaped holes; two sides of one support column 15 are provided with third sliding parts which are matched with the third guide slide ways 14b to slide, and the number of the third sliding parts is two; the support column 15 is further provided with a third locking piece for locking the position of the third sliding part, the third locking piece is matched with the third sliding part one by one, and the third locking piece is a locking screw or a locking nut. The upper part of the supporting column 16 is provided with a welding plate 20, and the rotating shaft bearing seat 17 is arranged on the welding plate 20, so that the position of the rotating shaft bearing seat 17 can be accurately arranged; the lower part of the supporting column 16 is provided with a limiting plate which is matched with the bottom frame 14 for guiding and is used for preventing the supporting column 16 from rotating.
The invention provides a solid tire performance testing device, which has the following working principle: the solid tire is axially fixed through the tire clamping ring and the shaft sleeve ring on the driving rotating shaft 2, so that the tire is aligned with the driven roller 6, and further, the positive center of the solid tire is aligned with the positive center of the driven roller 6 through finely adjusting the horizontal position of the driven roller 6, so that the stress of the tire can be accurately determined. The worm gear screw lifter pushes the driven roller 6 to move, so that the driven roller 6 is in contact with the solid tire, when the pressure value displayed by the pressure sensor 13 reaches a set value, the pushing is stopped, the motor is started at the same time, the motor transmits force to the driving rotating shaft 2 through the belt wheel and drives the driven roller 6 to rotate together, the motor is regulated to the required rotating speed, the timing is started, and the tire is tested; when the rotating mileage of the solid tire reaches the requirement, the motor is turned off, the turbine spiral elevator is moved downwards, the driven roller 6 is separated from the solid tire, a larger gap is reserved, the deformation amount of the tire is detected after the tire is kept still for a period of time, and the permanent deformation performance test of the tires made of different materials is realized. In the rotating process, the temperature change condition of the tire can be recorded in real time through an infrared thermal imaging recorder, and the heat resistance test of the tires made of different materials can be realized according to the measured real-time data.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.

Claims (10)

1. The utility model provides a solid tyre capability test device, includes power unit (1) and by power unit (1) driven initiative pivot (2), be equipped with on initiative pivot (2) and be used for the fixed subassembly (3) of tire of axial fixity solid tyre, its characterized in that: still including being used for providing pressure mechanism (4) of test pressure to solid tyre, pressure mechanism (4) are including lifting unit (5), be equipped with driven roller (6) that set up with solid tyre relatively on lifting unit (5).
2. A solid tire performance testing apparatus as recited in claim 1, wherein: the tire fixing component (3) comprises a first limiting ring (7) and a second limiting ring (8) which are coaxially mounted on the driving rotating shaft (2), and a gap is reserved between the first limiting ring (7) and the second limiting ring (8).
3. A solid tire performance testing apparatus as claimed in claim 2, wherein: a first positioning ring (9) and a second positioning ring (10) which are coaxially arranged on the driving rotating shaft (2) are arranged in the gap, and a solid tire is axially fixed between the first positioning ring (9) and the second positioning ring (10).
4. A solid tire performance testing apparatus as recited in claim 1, wherein: the lifting assembly (5) is a turbine spiral lifter, a positioning plate (11) is installed on the turbine spiral lifter, and the driven roller (6) is rotatably installed on the positioning plate (11).
5. A solid tire performance testing apparatus as recited in claim 4, wherein: two ends of the driven roller (6) are arranged on the positioning plate (11) through roller bearing seats (12), and the roller bearing seats (12) are arranged on the positioning plate (11) in a sliding mode.
6. A solid tire performance testing apparatus as recited in claim 4, wherein: and a pressure sensor (13) is arranged between the turbine spiral lifter and the positioning plate (11).
7. A solid tire performance testing apparatus as recited in claim 1, wherein: the power mechanism (1) comprises a motor, and an output shaft of the motor is in transmission connection with the driving rotating shaft (2) through a belt and a belt wheel.
8. A solid tire performance testing apparatus as claimed in claim 1 or 4, wherein: the lifting assembly (5) is slidably mounted on the bottom frame (14), and the driving rotating shaft (2) is rotatably mounted on the bottom frame (14).
9. A solid tire performance testing apparatus as recited in claim 8, wherein: at least one supporting column (15) is vertically arranged on the bottom frame (14), a rotating shaft bearing seat (16) is installed on each supporting column (15), and the driving rotating shaft (2) is rotatably installed on the rotating shaft bearing seat (16).
10. A solid tire performance testing apparatus as recited in claim 5, wherein: be equipped with first sliding part on roller bearing frame (12), be equipped with first direction slide (11a) on locating plate (11), first sliding part slides with first direction slide (11a) and sets up, just be equipped with first retaining member on the first sliding part.
CN202010137906.3A 2020-03-03 2020-03-03 Solid tire performance testing device Pending CN111189651A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010137906.3A CN111189651A (en) 2020-03-03 2020-03-03 Solid tire performance testing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010137906.3A CN111189651A (en) 2020-03-03 2020-03-03 Solid tire performance testing device

Publications (1)

Publication Number Publication Date
CN111189651A true CN111189651A (en) 2020-05-22

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Application Number Title Priority Date Filing Date
CN202010137906.3A Pending CN111189651A (en) 2020-03-03 2020-03-03 Solid tire performance testing device

Country Status (1)

Country Link
CN (1) CN111189651A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111624005A (en) * 2020-07-03 2020-09-04 无锡职业技术学院 Self-checking device and self-checking method for automobile tire

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20100064025A (en) * 2008-12-04 2010-06-14 한국타이어 주식회사 Crack tester of tire grooves
CN205192767U (en) * 2015-11-11 2016-04-27 陕西理工学院 Tire test atress platform
CN109916640A (en) * 2019-03-29 2019-06-21 重庆长安汽车股份有限公司 A kind of automobile tire operational modal test device
CN110146306A (en) * 2019-06-18 2019-08-20 上海钧正网络科技有限公司 A kind of rolling resistance test device and rolling resistance test method
CN211292020U (en) * 2020-03-03 2020-08-18 宁波格林美孚新材料科技有限公司 A solid tire performance testing device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20100064025A (en) * 2008-12-04 2010-06-14 한국타이어 주식회사 Crack tester of tire grooves
CN205192767U (en) * 2015-11-11 2016-04-27 陕西理工学院 Tire test atress platform
CN109916640A (en) * 2019-03-29 2019-06-21 重庆长安汽车股份有限公司 A kind of automobile tire operational modal test device
CN110146306A (en) * 2019-06-18 2019-08-20 上海钧正网络科技有限公司 A kind of rolling resistance test device and rolling resistance test method
CN211292020U (en) * 2020-03-03 2020-08-18 宁波格林美孚新材料科技有限公司 A solid tire performance testing device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111624005A (en) * 2020-07-03 2020-09-04 无锡职业技术学院 Self-checking device and self-checking method for automobile tire
CN111624005B (en) * 2020-07-03 2021-12-21 无锡职业技术学院 Self-checking device and self-checking method for automobile tire

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