CN214173207U

CN214173207U - Multifunctional detecting and measuring tool for bicycle rim

Info

Publication number: CN214173207U
Application number: CN202120138091.0U
Authority: CN
Inventors: 蒋惠明; 周宗付
Original assignee: Geant China Co ltd
Current assignee: Geant China Co ltd; Giant China Co Ltd
Priority date: 2021-01-19
Filing date: 2021-01-19
Publication date: 2021-09-10
Anticipated expiration: 2031-01-19

Abstract

The utility model relates to a multi-functional measuring tool that detects of bicycle rim, which comprises a supporting table, fixed mounting support frame on the brace table, be equipped with a plurality of support arms on the support frame, all be equipped with first positioning mechanism and second positioning mechanism on every support arm, when the wheel rim was arranged in on the support frame, utilize first positioning mechanism and second positioning mechanism to be positioned wheel rim lateral wall and wheel rim inside wall respectively and inject the wheel rim, the fixed first measuring mechanism that is equipped with on the first positioning mechanism, first measuring mechanism contacts in the measuring point of wheel rim upper surface, the fixed second measuring mechanism that is equipped with on the second positioning mechanism, second measuring mechanism contacts in the measuring point of wheel rim lateral wall. The utility model discloses can survey the plane degree of wheel rim, real circularity and the three index of seam offset, convenient operation is swift, and measurement accuracy is high.

Description

Multifunctional detecting and measuring tool for bicycle rim

Technical Field

The utility model relates to a detect the measuring tool, concretely relates to multi-functional detection measuring tool of bicycle rim.

Background

The bicycle rim is an important component of a bicycle, the quality of the rim is directly related to the riding experience of a rider, and therefore the roundness, the flatness and the joint fracture need to be detected before the bicycle rim leaves a factory. At present, three devices are needed to be adopted for respectively detecting the three quality detection items, which is very inconvenient, long in time consumption and poor in detection precision.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects, the utility model provides a multi-functional measuring tool that detects of bicycle rim, this measuring tool can accomplish the detection of the true circularity of rim, plane degree and seam offset simultaneously, and the operation is very simple and convenient, detects the precision height moreover.

The utility model discloses a solve the technical scheme that its technical problem adopted and be:

the utility model provides a bicycle rim multifunctional detection measuring tool, includes a supporting bench, the fixed mounting support frame on the brace table, be equipped with a plurality of support arms on the support frame, all be equipped with first positioning mechanism and second positioning mechanism on every support arm, when the wheel rim was arranged in on the support frame, utilize first positioning mechanism and second positioning mechanism to be located wheel rim lateral wall and wheel rim inside wall respectively and inject the wheel rim, the fixed first measuring mechanism that is equipped with on the first positioning mechanism, first measuring mechanism contacts in the measuring point of wheel rim upper surface, the fixed second measuring mechanism that is equipped with on the second positioning mechanism, the second measuring mechanism contact in the measuring point of wheel rim lateral wall.

Preferably, the supporting platform is of a cylindrical structure, and the supporting frame is fixedly connected to the central axis of the supporting platform.

Preferably, the support frame comprises three support arm, and the one end fixed connection of three support arm is in the same place, and the contained angle between two adjacent support arms is 120, the support arm is cuboid aluminium alloy support arm, all is equipped with the bar groove on four lateral walls on the upper and lower, left and right of this support arm.

Preferably, first positioning mechanism is fixed in the bar inslot of lateral wall on the support arm, second positioning mechanism is fixed in the bar inslot of support arm left side wall or right side wall.

Preferably, first positioning mechanism includes first stopper, first quick detach handle and atmospheric pressure thimble, first stopper is connected in the bar inslot of lateral wall on the support arm through first quick detach handle, the atmospheric pressure thimble is fixed in on the first stopper and this atmospheric pressure thimble is used for the top lean on in the wheel rim lateral wall.

Preferably, the second positioning mechanism comprises a second limiting block, a second quick-release handle, a limiting column, a bearing and a roller, the second limiting block is connected in a strip-shaped groove of the left side wall or the right side wall of the support arm through the second quick-release handle, the lower end of the limiting column is fixed on the second limiting block, the roller is rotatably connected at the upper end of the limiting column through the bearing, and the roller is used for pushing against the inner side wall of the wheel rim.

Preferably, the first measuring mechanism comprises a first base and a first digital display dial indicator, the first base is fixed on the first positioning mechanism, the first digital display dial indicator is in contact with a measuring point on the upper surface of the rim, the second measuring mechanism comprises a second base and a second digital display dial indicator, the second base is fixed on the second positioning mechanism, and the second digital display dial indicator is in contact with a measuring point on the outer side wall of the rim.

Preferably, first base is the magnetism base, first measuring mechanism still includes first branch and second branch, first branch set firmly vertically on the first base, second branch through adjust press from both sides connect perpendicularly in on the first branch, first digital display percentage table is located vertically on the second branch, the lower extreme of first digital display percentage table is equipped with first measuring staff, the lower extreme contact of this first measuring staff in the measuring point of wheel rim upper surface.

Preferably, the second base is the magnetism base, second measuring mechanism still includes third branch and fourth branch, third branch set firmly vertically in on the second base, fourth branch through adjust press from both sides connect perpendicularly in on the third branch, the second digital display percentage table is located horizontally on the fourth branch, the front end of second digital display percentage table is equipped with second measuring staff and cylinder, the fixed connector that is equipped with on the second measuring staff, the cylinder rotationally locates through the pivot the connector, the cylinder contacts in the measuring point of wheel rim lateral wall.

The utility model has the advantages that:

1) the utility model discloses a support frame, first positioning mechanism, second positioning mechanism, first measuring mechanism and second measuring mechanism, the support frame is used for supporting the wheel rim, first positioning mechanism and second positioning mechanism are used for injecing the wheel rim to guarantee that the wheel rim can not rock when smoothly rotating, first measuring mechanism and second measuring mechanism are located wheel rim upper surface and the lateral wall of wheel rim respectively and are used for determining the amount true roundness, plane degree and the seam fault tolerance of wheel rim, consequently utilize the utility model discloses can the synchronous measurement true roundness, plane degree and the seam fault tolerance value of wheel rim, the operation is convenient, improved the efficiency of detection and promoted measuring precision;

2) the utility model discloses in utilize quick detach handle fixed first stopper and second stopper to combine the aluminium alloy support arm, consequently can conveniently adjust the position of first stopper and second stopper on the support arm to the measurement demand of the wheel rim of adaptation different specifications, and the aluminium alloy support arm has heat-resisting, non-deformable and characteristics such as lightweight;

3) the utility model discloses in utilize atmospheric pressure thimble and bearing type gyro wheel to be positioned wheel rim lateral wall and wheel rim inside wall respectively, more do benefit to the smooth and easy rotation of wheel rim, utilize the digital display percentage table of high accuracy as the digital display instrument, measurement accuracy is high, and the precision can reach 0.01mm, and quantizes true circularity, plane degree and seam offset 100% and the management and control of being convenient for, the utility model discloses simple structure, convenient operation has very strong practicality.

Drawings

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

FIG. 2 is an enlarged view taken at A in FIG. 1;

in the figure: 10-a support table, 20-a support frame, 21-a support arm, 22-a strip-shaped groove, 30-a first positioning mechanism, 31-a first limiting block, 32-a first quick-release handle, 33-an air pressure thimble, 40-a second positioning mechanism, 41-a second limiting block, 42-a second quick-release handle, 43-a limiting column, 44-a bearing, 45-a roller, 50-a first measuring mechanism, 51-a first base, 52-a first supporting rod, 53-a second supporting rod, 54-a first digital display dial indicator, 55-a first measuring rod, 60-a second measuring mechanism, 61-a second base, 62-a third supporting rod, 63-a fourth supporting rod, 64-a second digital display dial indicator, 65-a second measuring rod, 66-a connector and 67-a rotating shaft, 68-roller, 70-rim, 71-rim outer side wall, 72-rim inner side wall, 73-rim upper surface.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. 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.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

Example (b): as shown in fig. 1-2, a multifunctional measuring tool for a bicycle rim comprises a support table 10, a support frame 20 is fixedly mounted on the support table 10, a plurality of support arms 21 are disposed on the support frame 20, each support arm 21 is provided with a first positioning mechanism 30 and a second positioning mechanism 40, when a rim 70 is disposed on the support frame 20, the first positioning mechanism 30 and the second positioning mechanism 40 are respectively positioned on an outer side wall 71 and an inner side wall 72 of the rim to limit the rim, the first positioning mechanism 30 is fixedly provided with a first measuring mechanism 50, the first measuring mechanism 50 is in contact with a measuring point on an upper surface 73 of the rim, the second positioning mechanism 40 is fixedly provided with a second measuring mechanism 60, and the second measuring mechanism 60 is in contact with a measuring point on the outer side wall 71 of the rim.

The utility model discloses a support frame 20, first positioning mechanism 30, second positioning mechanism 40, first measuring mechanism 50 and second measuring mechanism 60, put rim 70 on support frame 20 back utilize first positioning mechanism 30 of multiunit and second positioning mechanism 40 to follow the outside of rim respectively, the rim is cliied to interior both sides, make the rim can smooth and easy rotation but can not produce and rock, readjust first measuring mechanism 50 and second measuring mechanism 60 and make both contact with the measuring point of rim upper surface and lateral wall respectively, namely first measuring mechanism 50 vertical location is on the turning plane of rim upper surface, second measuring mechanism 60 horizontal location is on the cambered surface of rim lateral wall, rotate rim 70 a round, the value that shows on according to first measuring mechanism 50 measures the rim plane degree, the value that shows on according to the second measuring mechanism measures the rim true circularity; and finally, rotating the joint point of the rim to the second measuring mechanism 60 to enable the second measuring mechanism 60 to be in contact with one side of the joint point, rotating the rim to enable the contact position of the rim and the measuring mechanism to be rotated from one side of the joint point to the other side, and measuring the joint break value of the rim according to the digital display value on the second measuring mechanism 60. Consequently utilize the utility model discloses can survey the plane degree of wheel rim, real circularity and the three index of seam offset, convenient operation is swift, and measurement accuracy is high.

Brace table 10 is the cylinder structure, support frame 20 fixed connection in brace table 10's the central axis department, brace table 10 is the iron platform, and two upper and lower planes of brace table are the location reference surface of the high plane degree of CNC processing, in order to guarantee the utility model discloses a detection precision. In this embodiment, the support frame 20 comprises three support arm 21, and the one end fixed connection of three support arm 21 is in the same place, and the contained angle between two adjacent support arms 21 is 120, the support arm 21 is cuboid aluminium alloy support arm, all is equipped with bar groove 22 on the upper and lower, left and right four lateral walls of this support arm 21, and the support frame 20 is arranged in on the brace table 10, and the junction of three support arm 21 is fixed in the central axis of brace table.

First positioning mechanism 30 is fixed in the bar groove 22 of lateral wall on the support arm 21, second positioning mechanism 40 is fixed in the bar groove 22 of support arm 21 left side wall or right side wall.

The method specifically comprises the following steps: as shown in fig. 2, the first positioning mechanism 30 includes a first limiting block 31, a first quick-release handle 32 and a pneumatic thimble 33, the first limiting block 31 is connected to the strip-shaped groove 22 of the upper side wall of the support arm 21 through the first quick-release handle 32, the pneumatic thimble 33 is fixed on the first limiting block 31, and the pneumatic thimble 33 is used for abutting against the outer side wall 71 of the rim. The pneumatic thimble 33 is fixed in one side that first stopper 31 is close to the wheel rim, can lock first stopper 31 on support arm 21 or with its unblock fast through adjusting first quick detach handle 32, and when loosening first stopper 31, first stopper 31 can slide along bar groove 22 around going on to this satisfies the test demand of the wheel rim of different sizes, utilizes pneumatic thimble 33 to inject wheel rim 70, can guarantee better that the wheel rim pivoted is smooth and easy and can not take place to rock the phenomenon.

The method specifically comprises the following steps: as shown in fig. 2, the second positioning mechanism 40 includes a second limiting block 41, a second quick release handle 42, a limiting column 43, a bearing 44 and a roller 45, the second limiting block 41 is connected to the strip-shaped groove 22 of the left or right side wall of the support arm through the second quick release handle 42, the lower end of the limiting column 43 is fixed on the second limiting block 41, the roller 45 is rotatably connected to the upper end of the limiting column 43 through the bearing 44, and the roller 45 is used for abutting against the inner side wall 72 of the rim. First stopper 31 and second stopper 41 are the iron stopper, can lock second stopper 41 in support arm 21 or with its unblock fast through adjusting second quick detach handle 42, when loosening second quick detach handle 42, second stopper 41 can slide around in bar groove 22 to this satisfies the test demand of not unidimensional wheel rim, according to the shape of wheel rim inside wall 72, utilizes gyro wheel 45 to prescribe a limit to the inside wall of wheel rim, has adopted the bearing so that the gyro wheel rotates together and has reduced frictional force between the two when the wheel rim rotates, is favorable to the smooth rotation of wheel rim the utility model discloses in, utilize atmospheric pressure thimble and gyro wheel to prescribe a limit to the lateral wall and the inside wall of wheel rim respectively, thereby guaranteed smooth and easy rotation of wheel rim, and the rotation in-process, the wheel rim can not take place to rock, has improved measuring precision.

First measuring mechanism 50 includes first base 51 and first digital display percentage table 54, first base 51 is fixed in on the first positioning mechanism 30, first digital display percentage table 54 contacts in the measuring point of rim upper surface 73, second measuring mechanism 60 includes second base 61 and second digital display percentage table 64, second base 61 is fixed in on the second positioning mechanism 40, second digital display percentage table 64 contacts in the measuring point of rim lateral wall 71.

The method specifically comprises the following steps: as shown in fig. 2, the first base 51 is a magnetic base, the first measuring mechanism 50 further includes a first supporting rod 52 and a second supporting rod 53, the first supporting rod 52 is vertically and fixedly disposed on the first base 51, the second supporting rod 53 is vertically connected to the first supporting rod 52 through an adjusting clamp, the first digital display dial indicator 54 is vertically disposed on the second supporting rod 53, a first measuring rod 55 is disposed at a lower end of the first digital display dial indicator 54, and a lower end of the first measuring rod 55 contacts a measuring point of the rim upper surface 73. First base 51 is the magnetism base, this first base 51 actuation is on a lateral wall of the first stopper 31 of iron-based, it is convenient to assemble, first branch 52 arranges with first base 51 is perpendicular, second branch 53 arranges with first branch 52 is perpendicular, first branch 53 arranges promptly vertically, second branch 53 level is arranged, first digital display percentage table locates on second branch 53 vertically, during the measurement, first measuring staff 55 vertical positioning of first digital display percentage table is on the turning plane of wheel rim upper surface, through adjusting the adjusting clamp, can adjust the position of the upper and lower and left and right directions of second branch, namely the position of the upper, lower, left and right directions of first digital display percentage table 54 is adjustable, consequently, can be applicable to the product of different specifications.

The method specifically comprises the following steps: as shown in fig. 2, the second base 61 is a magnetic base, the second measuring mechanism 60 further includes a third supporting rod 62 and a fourth supporting rod 63, the third supporting rod 62 is vertically fixedly arranged on the second base 61, the fourth supporting rod 63 is vertically connected to the third supporting rod 62 through an adjusting clamp, the second digital display dial indicator 64 is horizontally arranged on the fourth supporting rod 63, a second measuring rod 65 and a roller 68 are arranged at the front end of the second digital display dial indicator 64, a connector 66 is fixedly arranged on the second measuring rod 65, the roller 68 is rotatably arranged on the connector 66 through a rotating shaft 67, and the roller 68 is in contact with a measuring point on the outer side wall 71 of the rim. The second base 61 is a magnetic base, the second base 61 is attracted to one side wall of the second limiting block 41 made of iron, the assembly is convenient, the third support rod and the second base are vertically arranged, the fourth support rod and the third support rod are vertically arranged, namely the third support rod is vertically arranged, the fourth support rod is horizontally arranged, the second digital display dial indicator 64 is horizontally arranged on the fourth support rod, namely the roller 68 of the second digital display dial indicator is horizontally positioned on the cambered surface of the outer side wall 71 of the rim, the up-down and left-right directions of the fourth support rod can be adjusted by adjusting the adjusting clamp, namely the up-down, left-right directions of the second digital display dial indicator 54 can be adjusted, and therefore the magnetic base can be suitable for products with different specifications; the roller 68 is additionally arranged on the second digital display dial indicator 64 and is in contact with the rim, and the roller can rotate in the rotating process of the rim so as to improve the measuring precision of the roundness of the rim.

The detection method of the multifunctional detection measuring tool for the bicycle rim comprises the following steps:

the method comprises the following steps: respectively adjusting the first positioning mechanism 30 and the second positioning mechanism 40 to enable the first positioning mechanism and the second positioning mechanism to be separated by a certain distance, and then placing the rim 70 to be measured between the first positioning mechanism 30 and the second positioning mechanism 40; the method specifically comprises the following steps: loosening the first quick-release handle 32, moving the first limit block 31 towards the outer side of the support arm along the strip-shaped groove 22 of the support arm 21, loosening the second quick-release handle 42, and moving the second limit block 41 towards the inner side of the support arm along the strip-shaped groove of the support arm;

step two: adjusting the first positioning mechanism 30 to enable the air pressure thimble 33 of the first positioning mechanism to be abutted against the outer side wall 71 of the rim, and adjusting the second positioning mechanism 40 to enable the roller 45 of the second positioning mechanism to be abutted against the inner side wall 72 of the rim so as to limit the rim 70; the method specifically comprises the following steps: moving the first limiting block 31 towards the rim until the pneumatic ejector pin 33 abuts against the outer side wall 71 of the rim, locking the first quick-release handle 32, moving the second limiting block 41 towards the rim until the roller 45 abuts against the inner side wall 72 of the rim, locking the second quick-release handle 42, and finely adjusting the positions of the first positioning mechanism and the second positioning mechanism until the rim can smoothly rotate without shaking;

step three: adjusting the position of the first measuring mechanism 50 to vertically position a first measuring rod 55 of the first digital display dial indicator 54 on a turning plane on the upper surface of the rim; adjusting the position of the second measuring mechanism 60 to enable the roller 68 of the second digital display dial indicator 64 to be horizontally positioned on the cambered surface of the outer side wall 71 of the rim; the method specifically comprises the following steps: the position of the second support rod 53 in the first measuring mechanism in the up-down or left-right direction is adjusted, so that the first measuring rod 55 of the first digital display dial indicator 54 is just contacted with the measuring point on the upper surface of the rim; the position of the fourth supporting rod 63 in the second measuring mechanism in the up-down or left-right direction is adjusted, so that the roller 68 on the second digital display dial indicator 64 is just contacted with the measuring point on the outer side wall of the rim;

step four: after the rim is rotated for one circle, reading the numerical values of the first digital display dial indicator 54 and the second digital display dial indicator 64 to obtain the flatness and the true roundness of the rim;

step five: the joint point of the rim is rotated to the second measuring mechanism 60, the roller 68 of the second digital display dial indicator 64 is contacted with one side of the joint point, then the rim is rotated, the joint point of the rim passes through the roller 68, and the joint breaking value of the rim can be measured according to the digital display value on the second digital display dial indicator 64.

It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several changes and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. The utility model provides a multi-functional measuring tool of bicycle rim which characterized in that: including brace table (10), fixed mounting support frame (20) on brace table (10), be equipped with a plurality of support arms (21) on support frame (20), all be equipped with first positioning mechanism (30) and second positioning mechanism (40) on every support arm (21), when support frame (20) was arranged in to wheel rim (70), utilize first positioning mechanism (30) and second positioning mechanism (40) to be located wheel rim lateral wall (71) and wheel rim inside wall (72) respectively and inject the wheel rim, fixed being equipped with first measuring mechanism (50) on first positioning mechanism (30), first measuring mechanism (50) contact in the measuring point of wheel rim upper surface (73), fixed being equipped with second measuring mechanism (60) on second positioning mechanism (40), second measuring mechanism (60) contact in the measuring point of wheel rim lateral wall (71).

2. The multifunctional measuring tool for detecting the bicycle rim according to claim 1, wherein: the supporting table (10) is of a cylindrical structure, and the supporting frame (20) is fixedly connected to the central axis of the supporting table (10).

3. The multifunctional measuring tool for detecting the bicycle rim according to claim 1, wherein: support frame (20) comprise three support arm (21), and the one end fixed connection of three support arm (21) is in the same place, and the contained angle between two adjacent support arms is 120, support arm (21) are cuboid aluminium alloy support arm, all are equipped with bar groove (22) on the upper and lower, left and right four lateral walls of this support arm (21).

4. The multifunctional measuring tool for detecting the bicycle rim according to claim 3, wherein: the first positioning mechanism (30) is fixed in the strip-shaped groove (22) of the upper side wall of the support arm (21), and the second positioning mechanism (40) is fixed in the strip-shaped groove (22) of the left side wall or the right side wall of the support arm (21).

5. The multifunctional measuring tool for detecting the bicycle rim according to claim 4, wherein: first positioning mechanism (30) include first stopper (31), first quick detach handle (32) and atmospheric pressure thimble (33), first stopper (31) are connected in bar groove (22) of lateral wall on support arm (21) through first quick detach handle (32), atmospheric pressure thimble (33) are fixed in on first stopper (31) and this atmospheric pressure thimble (33) be used for the top lean on in rim lateral wall (71).

6. The multifunctional measuring tool for detecting the bicycle rim according to claim 4, wherein: second positioning mechanism (40) include second stopper (41), second quick detach handle (42), spacing post (43), bearing (44) and gyro wheel (45), second stopper (41) are connected in bar groove (22) of support arm left side wall or right side wall through second quick detach handle (42), the lower extreme of spacing post (43) is fixed in on second stopper (41), gyro wheel (45) rotationally connect in the upper end of spacing post (43) through bearing (44), and this gyro wheel (45) be used for the top lean on in wheel rim inside wall (72).

7. The multifunctional measuring tool for detecting the bicycle rim according to claim 1, wherein: first measuring mechanism (50) include first base (51) and first digital display percentage table (54), first base (51) are fixed in on first positioning mechanism (30), first digital display percentage table (54) contact in the measuring point of wheel rim upper surface (73), second measuring mechanism (60) include second base (61) and second digital display percentage table (64), second base (61) are fixed in on second positioning mechanism (40), second digital display percentage table (64) contact in the measuring point of wheel rim lateral wall (71).

8. The multifunctional measuring tool for detecting the bicycle rim according to claim 7, wherein: first base (51) are the magnetism base, first measuring mechanism (50) still include first branch (52) and second branch (53), first branch (52) vertically set firmly in on first base (51), second branch (53) through adjust press from both sides connect perpendicularly in on first branch (52), first digital display percentage table (54) are vertically located on second branch (53), the lower extreme of first digital display percentage table (54) is equipped with first measuring staff (55), the lower extreme of this first measuring staff (55) contacts in the measuring point of wheel rim upper surface (73).

9. The multifunctional measuring tool for detecting the bicycle rim according to claim 7, wherein: second base (61) is the magnetism base, second measuring mechanism (60) still include third branch (62) and fourth branch (63), third branch (62) set firmly vertically in on second base (61), fourth branch (63) through the regulation clamp connect perpendicularly in on third branch (62), second digital display percentage table (64) are located horizontally on fourth branch (63), the front end of second digital display percentage table (64) is equipped with second measuring staff (65) and cylinder (68), the fixed connector (66) that is equipped with on second measuring staff (65), cylinder (68) rotationally locate through pivot (67) connector (66), cylinder (68) contact in the measuring point of wheel rim lateral wall (71).