阅读说明：本技术 一种轮毂编码生成方法和装置 (Hub code generation method and device ) 是由 林斌 万坤 田勇 万士文 李庆贺 计森林 苏俩征 许国强 于 2021-07-15 设计创作，主要内容包括：本发明公开了一种轮毂编码生成方法和装置,包括：轮毂编码数据库调取,准备轮毂编码模板和数据-编码对照表；待编码轮毂参数提取,测量待编码的轮毂的特征参数；轮毂参数编码转换,将测量得到的轮毂特征参数和数据-编码对照表比对,将轮毂特征参数转换成轮毂特征编码；轮毂编码生成,将得到特征编码按照轮毂编码模板生成待编码轮毂的轮毂编码。本发明中将轮毂的特征参数和特征编码一一对应,通过简单地运算处理将特征参数转化为特征编码,相关人员可以不需要专用设备而快速方便的通过轮毂编码推算轮毂的特征参数,从而能快速选取合适的轮毂。(The invention discloses a method and a device for generating a hub code, which comprise the following steps: calling a hub coding database, and preparing a hub coding template and a data-coding comparison table; extracting parameters of a hub to be coded, and measuring characteristic parameters of the hub to be coded; the hub parameter code conversion is carried out, the measured hub characteristic parameters are compared with a data-code comparison table, and the hub characteristic parameters are converted into hub characteristic codes; and generating a hub code, namely generating the hub code of the hub to be coded by the obtained characteristic code according to the hub code template. According to the invention, the characteristic parameters of the hub are in one-to-one correspondence with the characteristic codes, the characteristic parameters are converted into the characteristic codes through simple operation processing, and related personnel can rapidly and conveniently calculate the characteristic parameters of the hub through the hub codes without special equipment, so that a proper hub can be rapidly selected.)

1. A method of generating a hub code, comprising the steps of:

s1, calling a hub coding database, and preparing a hub coding template and a data-coding comparison table;

s2, extracting parameters of the hub to be coded, and measuring characteristic parameters of the hub to be coded;

s3, converting hub parameter codes, comparing the measured hub characteristic parameters with a data-code comparison table, and converting the hub characteristic parameters into hub characteristic codes;

and S4, generating hub codes, and generating the hub codes of the hub to be coded by the feature codes in the S3 according to the hub coding template.

2. The hub code generation method of claim 1, wherein the hub code template comprises a hub integral code template and a hub structure code template; the hub characteristic parameters can be divided into hub overall characteristic parameters and hub structure characteristic parameters.

3. The hub code generation method of claim 2, wherein the hub integral code template is composed of a hub diameter code, a hub width code, an offset code and a hub quality code and is used for identifying the integral shape characteristic of the hub; the hub overall characteristic parameters comprise the diameter of the hub, the width of the hub, the offset distance and the mass of the hub, and are used for describing the overall shape characteristic of the hub to be coded.

4. The hub code generation method according to claim 2, wherein the hub structure code template is composed of spoke codes, hole type codes, hole number codes, pitch circle diameter codes and center hole codes and is used for identifying specific structural characteristics of the hub; the structural characteristic parameters of the hub comprise the number of spokes, the shape of bolt holes, the number of bolt holes, the diameter of a pitch circle and the diameter of a central hole, and are used for describing the specific structural characteristics of the hub to be coded.

5. A hub code generating method according to claim 1, wherein each hub characteristic parameter in the data-code lookup table corresponds to a unique hub characteristic code, and the hub characteristic code is one of a numeric code, an alphabetic code and a mixed numeric and alphabetic code.

6. A hub code generation method according to claim 3, wherein said hub diameter code is a digital code; the hub width code is a mixed number and letter code; the offset coding is numerical coding or alphanumeric coding; the hub quality code is a digital code.

7. A hub code generation method according to claim 4, wherein said spoke code is a digital code; the hole pattern code is an alphabetic code; the hole number code is a digital code; the pitch circle diameter code is a digital code; the center hole code is a digital code.

8. A hub code generation device, comprising:

the storage module is used for storing a hub coding database and historical coding records;

the measuring module is used for measuring and extracting the characteristic parameters of the hub to be coded and taking the characteristic parameters as coding bases;

and the code generation module calls a hub code database and generates a hub code based on the measured hub parameters to be coded.

9. A hub code generating device according to claim 8, wherein said measuring module comprises:

the size measuring unit is used for measuring the diameter of the hub, the width of the hub, the offset distance, the pitch circle diameter and the diameter of the central hole;

the mass measuring unit is used for accurately measuring the mass of the hub;

and the image acquisition and analysis unit is used for acquiring the image of the hub and analyzing and extracting the structural characteristics of the hub, including the number of spokes, the shape of the bolt holes and the number of the bolt holes.

Technical Field

The invention relates to the field of automobile hubs, in particular to a hub code generation method and device.

Background

With the development of the automobile industry, the automobile part manufacturing industry, particularly the automobile hub manufacturing industry, is also developed at a high speed. In the automobile wheel hub industry, the most important thing is to the understanding of the model parameter of wheel hub, for example the diameter size and the width of wheel hub have decided with its size that can match the tire of installation, the centre bore diameter of wheel hub needs and the bearing size of vehicle mutually matches, parameters such as wheel hub's offset distance, bolt hole quantity and pitch circle diameter all need to accord with the original design condition of vehicle. When the vehicle is produced, the vehicle and the hub installed on the vehicle have set model parameters, and in the process of maintaining and replacing the hub, the parameters of the newly replaced hub also need to accord with the original parameter setting of the hub, and if the difference between the parameters is too large, the driving performance of the vehicle is greatly influenced, and even accidents occur. Therefore, a certain method needs to be found to obtain the model parameters of the hub.

A two-dimensional matrix lattice based on BCD codes for hub tracing and a generation method thereof are disclosed in Chinese patent documents, the publication number of the lattice is CN108009617A, the publication date is 2018-05-08, and the method comprises the following steps: the device comprises a direction code, a check code and a plurality of code text units. The direction code is positioned at the upper left corner of the two-dimensional matrix lattice and is used for representing the identification direction of the code text unit. The check code is positioned at the last bit of the two-dimensional matrix lattice and is used for detecting the correctness of the code text unit or correcting the misread code text unit. And the plurality of code text units are sequentially positioned at the rest positions of the two-dimensional matrix lattice and are used for representing hub tracing information. The code text unit, the direction code and the check code are all in a 2 x 2 lattice structure. However, the code text of the invention has requirements on the code printing position, and when the code is read, special equipment is needed to read the code text and convert the code text to obtain the hub data, and related personnel cannot directly know the hub data through the code of the hub.

Disclosure of Invention

The invention provides a hub code generation method and device, aiming at overcoming the problems that the code text information of a hub needs to be indirectly read and converted through equipment in the prior art, and related personnel cannot directly deduce the parameters of the hub according to the code text of the hub.

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

a hub code generation method, comprising the steps of:

s1, calling a hub coding database, and preparing a hub coding template and a data-coding comparison table;

s2, extracting parameters of the hub to be coded, and measuring characteristic parameters of the hub to be coded;

s3, converting hub parameter codes, comparing the measured hub characteristic parameters with a data-code comparison table, and converting the hub characteristic parameters into hub characteristic codes;

and S4, generating hub codes, and generating the hub codes of the hub to be coded by the feature codes in the S3 according to the hub coding template.

The hub coding template of the invention specifies the arrangement mode of the hub characteristic codes, and each hub characteristic code has a specific position, thereby facilitating related personnel to memorize and deduce the characteristics and characteristic parameters corresponding to each characteristic code. In the data-code comparison table, data and codes are in one-to-one correspondence, relevant personnel can directly calculate the characteristic parameters of the hub on site through simple calculation, for hub code words in other technologies, the relevant personnel need to read the code words of the hub through special equipment or mobile equipment, and the hub data stored by a hub manufacturer is called according to the code words after networking to obtain the characteristic parameters of the hub. However, when networking is not available or no equipment reads and converts the code text under specific conditions, related personnel cannot acquire the characteristic parameters of the hub through the code text, and under the conditions, the hub code in the invention can still enable the related personnel to directly read and infer the characteristic parameters of the hub, so that the hub coding method has a wider application range.

Preferably, the hub coding template comprises a hub integral coding template and a hub structure coding template; the hub characteristic parameters can be divided into hub overall characteristic parameters and hub structure characteristic parameters.

According to the invention, one hub is described through two aspects of hub overall characteristics and hub structural characteristics, when the hub codes are read, the shape parameters of the hub are known through the hub overall characteristics, and under the condition of meeting the hub overall characteristics, the hub structural characteristics are read to know the partial structures of the hub, so that different hubs can be conveniently selected.

Preferably, the hub integral coding template consists of a hub diameter code, a hub width code, an offset code and a hub quality code and is used for identifying the integral shape characteristic of the hub; the hub overall characteristic parameters comprise the diameter of the hub, the width of the hub, the offset distance and the mass of the hub, and are used for describing the overall shape characteristic of the hub to be coded.

In the invention, the diameter of the hub, the width of the hub, the offset distance and the mass of the hub are selected as characteristic parameters for describing the overall shape of the hub. The diameter of the hub and the width of the hub determine the size of a tire mounted on the hub, and only the hub and the tire with matched sizes can ensure the driving safety of a vehicle. The offset distance is the distance from the center line of the hub to the hub mounting surface, the offset distance of the hub is the same as the original design offset distance of the hub of the vehicle, and the change of the offset distance of the hub can change the wheel track of the vehicle so as to influence the load of the bearing. As for the mass of the wheel hub, the mass of the wheel hub arranged at two ends of the same bearing is the same or within an error range, otherwise, the balance misalignment and the shake of the vehicle during the movement can be caused, and the driving is influenced.

Preferably, the hub structure coding template is composed of spoke codes, hole type codes, hole number codes, pitch circle diameter codes and central hole codes and is used for identifying the specific structural characteristics of the hub; the structural characteristic parameters of the hub comprise the number of spokes, the shape of bolt holes, the number of bolt holes, the diameter of a pitch circle and the diameter of a central hole, and are used for describing the specific structural characteristics of the hub to be coded.

The number of spokes, the shape of the bolt holes, the number of the bolt holes, the diameter of the pitch circle and the diameter of the central hole are selected as characteristic parameters for describing the hub structure. The number of the spokes is selected to keep the appearance uniform, and the shape of the bolt hole is selected to ensure the stress consistency at the bolt. The bolt hole quantity, pitch circle diameter and centre bore diameter need and the bearing phase-match that the wheel hub is connected, connect wheel hub and bearing can seriously influence the security and the stability of vehicle under the not assorted circumstances.

Preferably, in the data-code comparison table, each hub characteristic parameter corresponds to a unique hub characteristic code, and the hub characteristic code is one of a numeric code, an alphabetic code and a mixed numeric and alphabetic code.

Preferably, the hub diameter code is a numerical code; the hub width code is a mixed number and letter code; the offset coding is numerical coding or alphanumeric coding; the hub quality code is a digital code.

Preferably, the spoke coding is a digital coding; the hole pattern code is an alphabetic code; the hole number code is a digital code; the pitch circle diameter code is a digital code; the center hole code is a digital code.

In the invention, the diameter parameter of the hub is in inches, and the digital code is the numerical value of the diameter of the hub and is a two-bit digital code; the width parameter of the hub takes inches as a unit, the numerical values of the unit and the decile of the width are taken as two-digit codes, and the numerical codes and the letter codes are combined into a digital-letter mixed code by combining the letter codes of the shape and the height of the flange of the hub; the offset coding is a three-digit number coding, the first digit "1" represents a positive offset, the "0" represents a negative offset, and the last two digits are offset values in millimeters; the hub mass code is a four-digit digital code, and ten-digit, thousand-digit, hundred-digit and ten-digit numerical values of the hub mass are taken as units of grams. The spoke code is a two-bit digital code and represents the number of spokes; the hole pattern code is a one-letter code and represents the shape of the bolt hole; the hole number code is a two-digit code and represents the number of bolt holes; the pitch circle diameter code is a four-digit code, and is a hundred digit, ten digit, unit digit and ten-decimals digit value of a pitch circle diameter parameter with millimeter as a unit; the central hole code is a three-digit number code which is a ten-digit, one-digit and ten-minute numerical value of the diameter parameter of the central hole in millimeter.

A hub code generation apparatus comprising: the storage module is used for storing a hub coding database and historical coding records; the measuring module is used for measuring and extracting the characteristic parameters of the hub to be coded and taking the characteristic parameters as coding bases; and the code generation module calls a hub code database and generates a hub code based on the measured hub parameters to be coded.

Preferably, the measurement module includes: the size measuring unit is used for measuring the diameter of the hub, the width of the hub, the offset distance, the pitch circle diameter and the diameter of the central hole; the mass measuring unit is used for accurately measuring the mass of the hub; and the image acquisition and analysis unit is used for acquiring the image of the hub and analyzing and extracting the structural characteristics of the hub, including the number of spokes, the shape of the bolt holes and the number of the bolt holes.

The hub code generating device also comprises a coding module, the generated hub code is printed on the hub, and the hub code comprises the hub integral code and the hub structure code, so that the hub code can be divided into two sections, and no specific requirement is required on the position. In addition, the image acquisition unit can be used for acquiring complete wheel hub image data, a 3D model of the wheel hub is built in the computer, and various parameters of the wheel hub are measured and calculated according to the model.

The invention has the following beneficial effects: the characteristic parameters of the hub are in one-to-one correspondence with the characteristic codes, the hub codes are generated according to the coding template, and related personnel can quickly and conveniently calculate the characteristic parameters of the hub through the hub codes, so that a proper hub can be quickly selected; the characteristic codes of the wheel hub are only subjected to simple operation processing on the characteristic parameters and correspond to the structural shapes and the letter parameters one by one, special equipment is not needed for scanning the wheel hub codes, a parallel network is converted into parameter display, and the applicable environment and range are wider.

Drawings

FIG. 1 is a flow chart of hub code generation of the present invention;

FIG. 2 is a cross-sectional view of the hub of the present invention;

FIG. 3 is a bolt hole pattern of the present invention;

FIG. 4 is a schematic view of a hub code generating device according to the present invention;

in the figure: 1. the hub diameter; 2. the width of the hub; 3. offset distance; 4. the diameter of the central hole; 5. pitch circle diameter; 6. bolt holes; 601. straight hole bolt holes; 602. a tapered bolt hole; 603. a spherical bolt hole.

Detailed Description

The invention is further described with reference to the following detailed description and accompanying drawings.

As shown in fig. 1, a hub code generation method includes the following steps:

s1, calling a hub coding database, and preparing a hub coding template and a data-coding comparison table;

s2, extracting parameters of the hub to be coded, and measuring characteristic parameters of the hub to be coded;

s3, converting hub parameter codes, comparing the measured hub characteristic parameters with a data-code comparison table, and converting the hub characteristic parameters into hub characteristic codes;

and S4, generating hub codes, and generating the hub codes of the hub to be coded by the feature codes in the S3 according to the hub coding template.

The hub coding template comprises a hub integral coding template and a hub structure coding template; the hub characteristic parameters can be divided into hub overall characteristic parameters and hub structure characteristic parameters.

As shown in fig. 2, the hub integral coding template is composed of a hub diameter code, a hub width code, an offset code and a hub quality code, and is used for identifying the integral shape characteristics of the hub; the overall characteristic parameters of the hub comprise the diameter 1 of the hub, the width 2 of the hub, the offset 3 and the mass of the hub, and are used for describing the overall shape characteristic of the hub to be coded.

The hub structure coding template consists of spoke codes, hole pattern codes, hole number codes, pitch circle diameter codes and central hole codes and is used for identifying the specific structural characteristics of the hub; the structural characteristic parameters of the hub comprise the number of spokes, the shape of the bolt holes 6, the number of the bolt holes 6, the pitch circle diameter 5 and the central hole diameter 4, and are used for describing the specific structural characteristics of the hub to be coded.

In the data-code comparison table, each hub characteristic parameter corresponds to a unique hub characteristic code, and the hub characteristic code is one of a number code, an alphabetic code and a mixed number-letter code.

The hub diameter code is a digital code; the hub width code is a mixed number and letter code; the offset coding is numerical coding or alphanumeric coding; the hub quality code is a digital code. The spoke codes are digital codes; the pass code is an alphabetic code; the hole number code is a digital code; the pitch circle diameter code is a digital code; the center hole code is a digital code.

As shown in fig. 4, a hub code generation apparatus includes: the storage module is used for storing a hub coding database and historical coding records; the measuring module is used for measuring and extracting the characteristic parameters of the hub to be coded and taking the characteristic parameters as coding bases; the code generation module is used for calling a hub coding database and generating a hub code based on the measured hub parameter to be coded; and the code printing module is used for printing the generated hub code on the hub.

The measurement module includes: the size measuring unit is used for measuring the diameter of the hub, the width of the hub, the offset distance, the pitch circle diameter and the diameter of the central hole; the mass measuring unit is used for accurately measuring the mass of the hub; and the image acquisition and analysis unit is used for acquiring the image of the hub and analyzing and extracting the structural characteristics of the hub, including the number of spokes, the shape of the bolt holes and the number of the bolt holes.

The hub coding template of the invention specifies the arrangement mode of the hub characteristic codes, and each hub characteristic code has a specific position, thereby facilitating related personnel to memorize and deduce the characteristics and characteristic parameters corresponding to each characteristic code. In the data-code comparison table, data and codes are in one-to-one correspondence, relevant personnel can directly calculate the characteristic parameters of the hub on site through simple calculation, for hub code words in other technologies, the relevant personnel need to read the code words of the hub through special equipment or mobile equipment, and the hub data stored by a hub manufacturer is called according to the code words after networking to obtain the characteristic parameters of the hub. However, when networking is not available or no equipment reads and converts the code text under specific conditions, related personnel cannot acquire the characteristic parameters of the hub through the code text, and under the conditions, the hub code in the invention can still enable the related personnel to directly read and infer the characteristic parameters of the hub, so that the hub coding method has a wider application range.

According to the invention, one hub is described through two aspects of hub overall characteristics and hub structural characteristics, when the hub codes are read, the shape parameters of the hub are known through the hub overall characteristics, and under the condition of meeting the hub overall characteristics, the hub structural characteristics are read to know the partial structures of the hub, so that different hubs can be conveniently selected.

In the invention, the diameter of the hub, the width of the hub, the offset distance and the mass of the hub are selected as characteristic parameters for describing the overall shape of the hub. The diameter of the hub and the width of the hub determine the size of a tire mounted on the hub, and only the hub and the tire with matched sizes can ensure the driving safety of a vehicle. The offset distance is the distance from the center line of the hub to the hub mounting surface, the offset distance of the hub is the same as the original design offset distance of the hub of the vehicle, and the change of the offset distance of the hub can change the wheel track of the vehicle so as to influence the load of the bearing. As for the mass of the wheel hub, the mass of the wheel hub arranged at two ends of the same bearing is the same or within an error range, otherwise, the balance misalignment and the shake of the vehicle during the movement can be caused, and the driving is influenced.

The number of spokes, the shape of the bolt holes, the number of the bolt holes, the diameter of the pitch circle and the diameter of the central hole are selected as characteristic parameters for describing the hub structure. The number of the spokes is selected to keep the appearance uniform, and the shape of the bolt hole is selected to ensure the stress consistency at the bolt. The bolt hole quantity, pitch circle diameter and centre bore diameter need and the bearing phase-match that the wheel hub is connected, connect wheel hub and bearing can seriously influence the security and the stability of vehicle under the not assorted circumstances.

In the invention, the diameter parameter of the hub is in inches, and the digital code is the numerical value of the diameter of the hub and is a two-bit digital code; the width parameter of the hub takes inches as a unit, the numerical values of the unit and the decile of the width are taken as two-digit codes, and the numerical codes and the letter codes are combined into a digital-letter mixed code by combining the letter codes of the shape and the height of the flange of the hub; the offset coding is a three-digit number coding, the first digit "1" represents a positive offset, the "0" represents a negative offset, and the last two digits are offset values in millimeters; the hub mass code is a four-digit digital code, and ten-digit, thousand-digit, hundred-digit and ten-digit numerical values of the hub mass are taken as units of grams. The spoke code is a two-bit digital code and represents the number of spokes; the hole pattern code is a one-letter code and represents the shape of the bolt hole; the hole number code is a two-digit code and represents the number of bolt holes; the pitch circle diameter code is a four-digit code, and is a hundred digit, ten digit, unit digit and ten-decimals digit value of a pitch circle diameter parameter with millimeter as a unit; the central hole code is a three-digit number code which is a ten-digit, one-digit and ten-minute numerical value of the diameter parameter of the central hole in millimeter.

The hub code generating device also comprises a coding module, the generated hub code is printed on the hub, and the hub code comprises the hub integral code and the hub structure code, so that the hub code can be divided into two sections, and no specific requirement is required on the position. In addition, the image acquisition unit can be used for acquiring complete wheel hub image data, a 3D model of the wheel hub is built in the computer, and various parameters of the wheel hub are measured and calculated according to the model.

The storage module stores a hub coding template and a data-coding comparison table, and also stores a historical coding generation record, so that related personnel can conveniently trace the historical record. The code generation module is used for calling the hub code template and the data-code comparison table in the storage module, generating a hub code according to the measurement result of the measurement module, and imprinting the generated hub code on the hub by the code printing module. The measuring module is used for measuring each characteristic parameter of the hub, and the quality measuring unit is used for measuring the accurate quality of the hub; the size measuring unit is used for measuring the diameter of the hub, the width of the hub, the offset distance, the diameter of the pitch circle and the diameter of the central hole, and the image acquisition and analysis unit is used for acquiring the image of the hub and analyzing and extracting the number of spokes, the shape of bolt holes and the number of bolt holes of the hub.

The data-code comparison table comprises a hub whole code comparison table and a hub structure code comparison table, and the partial data-code comparison conditions of all the comparison tables are shown as follows.

Comparison table of hub diameter and hub width

Hub diameter (mm)	Hub diameter (inch)	Hub diameter coding	Hub width (mm)	Hub width (inch)	Hub width coding
						304.0	12	12	114.5	4.5	45
329.4	13	13	127.0	5.0	50
						354.8	14	14	139.5	5.5	55
380.2	15	15	152.5	6.0	60
						405.6	16	16	165.0	6.5	65
436.6	17	17	178.0	7.0	70
						462.0	18	18	190.5	7.5	75
487.4	19	19	203.0	8.0	80
						512.8	20	20	216.0	8.5	85

The hub diameter and the hub width are measured in millimeters, the measurement result is converted into the hub diameter and the hub width in inches, the hub diameter is two digits or one digit, the hub code is a two-digit digital code, when the hub diameter is one digit, the first digit of the code is '0', and the second digit is a diameter numerical value. Similarly, the hub width is also a two digit code, resulting in a hub width in inches multiplied by ten. The two-digit number of the hub width is coded and then coded by letters, the letter codes represent the shape and the height of the hub flange, and the letter codes can be divided into C, J, JJ, JK and K according to the height from low to high, wherein J is the most common type, so that the width of the hub can also become a J value.

Wheel hub quality and offset comparison table

Hub quality (g)	Hub quality coding	Offset (mm)	Hub offset coding
				7958	0796	+54	154
7952	0795	+31	131
				8654	0865	0	100
9533	0953	-5	005
				10526	1053	-10	010
10521	1052	+9	109

The measured hub mass is expressed by taking grams as a unit, the normal hub gram weight is four digits or five digits, the hub gram weight is divided by ten to be rounded, and if the obtained result is four digits, the hub mass is directly used as a hub mass code; if the result is three digits, four digits obtained after the 0 is supplemented at the forefront are used as the hub quality code; for 7953 grams and 7948 grams, the corresponding hub mass encodings are 0795, and since the difference in hub mass is between a few grams, we consider that hub masses that are the same for hub mass encodings are the same. For the offset distance, when the offset distance is 0 mm, namely the hub mounting surface and the hub center line are overlapped, the hub is coded to be 100; when the offset is a positive value, converting the plus into the 1 as the first digit of the three-digit code, the last two digits are offset distance numerical values taking millimeters as a unit, and if the numerical value is a single digit, complementing the 0 before the numerical value to form a two-digit numerical value; when the offset distance is a negative value, the "-" is converted into "0" which is used as the first bit of the three-bit digital code, and the selection mode of the last two bits is the same as that when the offset distance is a positive value. In addition to this coding method, it is also possible to represent a positive value "+" by replacing "1" with the letter "P" and a negative value "-" by replacing "0" with the letter "N".

The spoke code of the hub is a two-digit code, the number of spokes is directly used as a code, and when the number of spokes is a single digit, the number of spokes is changed into a two-digit code by supplementing '0' in the front. The hole number coding of the hub and the spoke coding are the same.

The shape of the bolt holes is shown in fig. 3, and includes a straight hole bolt hole 601, a tapered bolt hole 602, and a spherical bolt hole 603. Wherein the Straight hole bolt hole 601 may be denoted by the code "S" and is the capital letter of Straight; the tapered bolt hole 602 may be represented by the code "T" and is the capital letter of Taper; the Ball bolt hole 603 may be indicated by the code "B" and is the capital letter of Ball. When the bolt holes are of too many types, so that different bolt hole shapes correspond to the same capital letter, the combination of the capital letter and the lower case letter can be considered, for example, the first two letters "St" of Stright are selected as codes of Straight hole bolt holes, and the number of the codes can be enlarged. In any letter code or mixed number-letter code, the hole type coding mode can be referred to.

Comparison table of pitch circle diameter and central hole diameter

Pitch circle diameter (mm)	Pitch circle diameter coding	Center hole diameter (mm)	Center hole coding
				108	1080	57	570
112	1120	67	670
				114.3	1143	72.5	725
120	1200	63.3	633

The pitch circle diameter refers to the diameter of a circle formed by the centers of all bolt holes on the hub, the measurement result is expressed by millimeter, and the four-digit numerical value of the integral part of the measurement result is taken as the pitch circle diameter code after the measurement result is multiplied by ten. The diameter of the central hole is measured by taking millimeter as a unit, and the three-digit numerical value of the integral part of the measurement result is taken as the central hole code after the measurement result is multiplied by ten.

In all the data-code comparison tables, because the measurement of data has error range, after the conversion from data to code, a feature code has a plurality of feature parameters corresponding to each other, for example, the hub mass 9567 g and 9573 g both correspond to the hub mass code 0957, for example, the hub diameters 436.62mm and 436.58mm both correspond to the hub diameter code 17, and since the difference between a plurality of feature parameters corresponding to the same feature code is much smaller than the value of the feature parameter itself, the hubs with the same feature code are considered to have the same feature parameter.

In the first embodiment, the hub code is divided into two rows, the first row is the hub overall code 16X 65J-151-. In the hub overall code 16X65J-151- > 1050, 16X65J represents that the hub diameter is 16 inches, the hub width is 6.5 inches, and the flange structure and height of the hub are J-shaped; 151 is the offset code, which illustrates that the offset of the hub is positive, offset by a distance of 51 mm; 1050 is a mass code, which illustrates that the hub has a mass between 10495 grams and 10504 grams. In the hub structure code 05-S05-1143-725, 05 is a spoke code, which indicates that the number of spokes of the hub is five; s05 represents that the bolt holes are straight-hole bolt holes, while the number of bolt holes is five; 1143 is the pitch circle diameter code, illustrating that the pitch circle diameter is 114.3 mm, 725 is the center hole code, illustrating that the center hole diameter is 72.5 mm.

In the second embodiment, the hub code is divided into two rows, the first row is the hub whole code 18X70J-N05-1050, and the second row is the hub structure code 05-B05-1200-. In the hub overall code 18X70J-N05-1050, 18X70J represents that the hub diameter is 18 inches, the hub width is 7 inches, and the flange structure and height of the hub are J-shaped; n05 is an offset code, which indicates that the offset of the hub is negative, offset by a distance of 5 mm; 1050 is a mass code, which illustrates that the hub has a mass between 10495 grams and 10504 grams. In the hub structure code 05-B05-1200-725, 05 is a spoke code, which indicates that the number of spokes of the hub is five; b05 represents that the bolt holes are spherical bolt holes, while the number of bolt holes is five; 1200 is the pitch circle diameter code, illustrating that the pitch circle diameter is 120 mm, 725 is the center hole code, illustrating that the center hole diameter is 72.5 mm.

As shown in the embodiment, the characteristic codes of the hub are only subjected to simple operation processing on the characteristic parameters and correspond to the structural shapes and the letter parameters one by one, code scanning parallel networks on the hub codes are not required to be carried out by special equipment and are converted into parameter display, relevant personnel can directly calculate and obtain various important characteristic parameters of the hub through the hub codes, and the method has a wide application range.

The above embodiments are further illustrated and described in order to facilitate understanding of the invention, and no unnecessary limitations are to be understood therefrom, and any modifications, equivalents, and improvements made within the spirit and principle of the invention should be included therein.