Measuring device

Abstract

The utility model provides a measuring device, and relates to the technical field of traction roller measuring equipment, the measuring device comprises a test platform, a positioning mechanism and a measuring mechanism, the measuring mechanism is arranged on the test platform and is located at one side of a roller body to be measured; wherein the two supporting assemblies are oppositely arranged, a supporting area is formed between the two supporting assemblies, and a roller body to be tested is placed in the supporting area through the supporting assemblies; the supporting assembly comprises a positioning body and a connecting piece, the positioning body comprises a first supporting plate and a second supporting plate which are buckled in the horizontal direction, the first supporting plate and the second supporting plate are each provided with a first groove formed in the same horizontal direction and form a containing area, and the connecting piece is clamped in the containing area; one end of the to-be-tested roller body is rotationally connected with the connecting piece; the technical problem that in the prior art, the connecting process between a bearing and a bearing seat in front of a traction roller by a measuring device is tedious is solved, and the technical effect of improving the working efficiency is achieved.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of traction roller measuring devices, and in particular to a measuring device. BACKGROUND

[0002] With the progress of science and technology, OLED carrier glass is widely used in various electronic and electrical products, such as flat panel displays and LTPSZ process LCD panels. The production line technology for producing OLED carrier glass is relatively mature at home and abroad.

[0003] In the carrier glass processing production line, the traction system is particularly important. The traction system mainly consists of several pairs of traction rollers with different functions. The traction roller described in the present patent is a pair of traction rollers that provide downward pulling force for the glass plate in the traction system. The downward pulling force allows the glass plate to be continuously shaped and formed downward, and then annealed and cut into semi-finished products. The requirements for the runout of the traction roller, the hardness and smoothness of the boss position on the traction roller are very high. Whether the boss of the traction roller is smooth, whether it has defects, and the size of the runout directly affect the performance and yield of the carrier glass forming.

[0004] Currently, the method for measuring the runout of the traction roller is to place the two ends of the traction roller into the bearing seat through the bearing, and then use a runout gauge to measure the runout of each position of the traction roller. Since the staff needs to continuously adjust the installation angle of the bearing from the outside when the bearing is pressed into the bearing seat, the process is complicated and a lot of time is wasted. CONTENT OF THE INVENTION

[0005] One of the technical problems to be solved by the present disclosure is how to solve the technical problem of the complicated connection process between the existing measuring device and the traction roller, and the low work efficiency.

[0006] To solve the above technical problems, the present disclosure provides a measuring device, comprising:

[0007] A test platform for supporting a roller body to be tested;

[0008] A positioning mechanism comprising at least two support assemblies;

[0009] A measuring mechanism arranged on the test platform and located on one side of the roller body to be tested;

[0010] Wherein, the two support assemblies are arranged opposite to each other, and a support area is formed between the two support assemblies, and the roller body to be tested is placed in the support area through the support assemblies;

[0011] The support assembly comprises a positioning main body and a connecting piece, the positioning main body comprises a first support plate and a second support plate which are buckled in a horizontal direction, the first support plate and the second support plate are each provided with a first groove arranged in the same horizontal direction and form an accommodation area, and the connecting piece is clamped in the accommodation area;

[0012] One end of the to-be-measured roller body is rotationally connected with the connecting piece.

[0013] In some embodiments, the positioning main body further comprises an inner support plate clamped between the first outer support plate and the second outer support plate.

[0014] The inner support plate is provided with a second groove arranged in the same horizontal direction as the first groove.

[0015] In some embodiments, the connecting piece is a bearing, the inner diameter of the first groove is smaller than the outer diameter of the bearing outer ring, and the inner diameter of the second groove is greater than the outer diameter of the bearing outer ring.

[0016] In some embodiments, the measuring mechanism comprises a measuring assembly, the measuring assembly comprises a base, a column, a connecting rod, a table clamp and a measuring instrument.

[0017] The column is slidingly connected with the base to move the column horizontally.

[0018] The connecting rod and the table clamp are respectively slidingly connected with the column and move vertically, the table clamp is rotationally connected with the outermost connecting rod, and the plurality of connecting rods are detachably connected.

[0019] The measuring instrument is detachably connected to the table clamp, and the measuring instrument is used for measuring the to-be-measured roller body.

[0020] In some embodiments, the measuring mechanism further comprises a sliding assembly, the sliding assembly comprises a support main body and a sliding groove arranged in the support main body, and the bottom of the base is provided with a connecting protrusion which is slidingly connected with the sliding groove.

[0021] In some embodiments, the base is a magnetic base, the magnetic base comprises a knob, and the knob is used for controlling the connection or separation of the base and the test platform.

[0022] In some embodiments, the connecting rod is provided with a locking piece, the locking piece is inserted into the connecting rod in an axial direction and abuts against the column, and the locking piece is detachably connected with the connecting rod.

[0023] The locking piece is used for limiting the sliding of the connecting rod along the column.

[0024] In some embodiments, the test platform comprises a first support frame and a second support frame arranged oppositely, and the support main body is detachably connected between the first support frame and the second support frame.

[0025] The first support frame and the second support frame are each provided with a support assembly, and the to-be-measured roller body is connected between the oppositely arranged support assemblies.

[0026] The support body is arranged on one side of the measured roller body, and the measuring assembly reciprocally moves along the axial direction of the measured roller body through the sliding groove.

[0027] In some embodiments, a magnetic area is arranged on one side of the support area of the test platform, and the magnetic area is used for magnetic connection with the magnetic base.

[0028] In some embodiments, the difference between the inner diameter of the first groove and the outer diameter of the bearing is between 4mm and 5mm.

[0029] The difference between the inner diameter of the second groove and the outer diameter of the bearing is between 4mm and 5mm.

[0030] By the above technical solution, the measuring device provided by the present disclosure adopts two support assemblies arranged oppositely to form a support area for supporting the measured roller body. The support assembly includes a positioning body and a connecting piece. The positioning body adopts a first support plate and a second support plate connected in a buckling manner. The connecting piece can adopt a component with external fastening connection and internal rotating connection similar to a bearing. When the measured roller body is installed, the connecting piece is first connected through a key, a thread or the like. The first support plate and the second support plate are respectively arranged along the two sides of the connecting piece. The connecting piece is stably placed in the support area through the support force of the first support plate and the second support plate and the bearing force formed by the first groove, so as to realize the axial fixation of the measured roller body. Therefore, the technical solution provided by the present disclosure can meet the support requirements of the traction roller roundness measurement. In order to further ensure the accuracy, the measuring mechanism is arranged on the test platform on one side of the measured roller body, so as to facilitate the measurement of the staff. Through the implementation of the above technical solution, the technical problem of complicated connection process between the bearing and the bearing seat before the measurement of the measuring device in the prior art is solved, and the technical effect of improving the low work efficiency is achieved. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present disclosure, and other drawings can be obtained by those skilled in the art without creative labor.

[0032] Figure 1 is the overall structure schematic diagram of the measuring device disclosed by the embodiments of the present disclosure;

[0033] Figure 2 is the side view of the measuring device disclosed by the embodiments of the present disclosure;

[0034] Figure 3is a structural schematic view of a positioning body in a measuring device disclosed by embodiments of the present disclosure;

[0035] Figure 4 is a structural schematic view of a measuring assembly in a measuring device disclosed by embodiments of the present disclosure;

[0036] Figure 5 is a structural schematic view of a locking piece in a measuring device disclosed by embodiments of the present disclosure.

[0037] Legend of reference signs:

[0038] 10 - roll body to be measured; 100 - test platform; 110 - first support frame; 120 - second support frame; 130 - reinforcing rib; 140 - foot plate; 200 - positioning mechanism; 210 - support assembly; 211 - positioning body; 2111 - first support plate; 2112 - second support plate; 2113 - inner support plate; 220 - connecting piece; 212 - first groove; 213 - second groove; 300 - measuring mechanism; 310 - measuring assembly; 311 - base; 312 - column; 313 - connecting rod; 314 - table clamp; 315 - measuring instrument; 316 - locking piece; 320 - sliding assembly; 321 - sliding groove; 322 - support body. DETAILED DESCRIPTION

[0039] The embodiments of the present disclosure will be further described in detail below with reference to the accompanying drawings and embodiments. The detailed description and drawings of the following embodiments are used to exemplarily illustrate the principles of the present disclosure, but cannot be used to limit the scope of the present disclosure, and the present disclosure can be implemented in many different forms, and is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0040] The present disclosure provides these embodiments in order to make the present disclosure thorough and complete, and fully express the scope of the present disclosure to those skilled in the art. It should be noted that: unless otherwise specified, the relative arrangement of components and steps, the composition of materials, numerical expressions and values set forth in these embodiments should be interpreted as merely exemplary, and not as a limitation.

[0041] It should be noted that, in the description of the present disclosure, unless otherwise specified, the meaning of "a plurality of" is greater than or equal to two; the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer" and the like are merely for the purpose of facilitating the description of the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation to the present disclosure. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0042] In addition, the "first", "second" and similar words used in the present disclosure do not represent any order, quantity or importance, but are only used to distinguish different parts. "Vertical" is not strictly vertical, but within the allowable error range. "Parallel" is not strictly parallel, but within the allowable error range. "Include" or "contain" and similar words mean that the elements before the word cover the elements listed after the word, and do not exclude the possibility of also covering other elements.

[0043] It should also be noted that in the description of the present disclosure, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integral connection; it can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present disclosure can be understood according to the specific circumstances. When it is described that a specific device is located between the first device and the second device, there can be or can not be an intermediate device between the specific device and the first device or the second device.

[0044] All terms used in the present disclosure have the same meaning as understood by those skilled in the art to which the present disclosure belongs, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries should be interpreted to have meanings consistent with their meanings in the context of the relevant technology, and should not be interpreted in an idealized or excessively formalized sense, unless otherwise defined herein.

[0045] Techniques, methods and devices known to those skilled in the relevant art can not be discussed in detail, but where appropriate, the techniques, methods and devices should be considered as part of the specification.

[0046] The utility model discloses first positioning mechanism 200 and measurement platform are integrated on test platform 100, convenient for operator equipment operation and unified management, simultaneously, in order to further reduce the labor intensity of operator, the utility model is first to the connection between the positioning main part 211 of positioning mechanism 200 and the measured roll body 10 makes improvement, i.e. the bearing in the bearing seat of prior art is improved into the mode that the first support plate 2111 and the second support plate 2112 are buckled, and the preparation work of operator before the measurement process is greatly reduced, second, in the measurement process, through the sliding connection or magnetic connection of measurement assembly 310 and measurement platform, the installation position of traction roller and measuring tool is fixed, and when measuring each time, only the height of measuring tool needs to be adjusted to make the measuring tool measure the round runout of traction roller at the preset angle orientation, to ensure that the measurement position of traction roller is consistent each time, and reduce the measurement error, third, the measurement assembly 310 is also improved to multidimensional adjustment, and the measurement precision is further improved.

[0047] By the implementation of the technical scheme, the problem of complicated measurement of the jump of the traction roller by the existing measuring device is solved, and the device is convenient to place and prevents scratches on the outer surface of the roller body during the measurement process. The device has the advantages of simplicity, easy operation, low cost and high measurement efficiency.

[0048] The technical scheme of the utility model is described below through two embodiments.

[0049] Embodiment one

[0050] As shown in the accompanying drawings, Figures 1-5 the embodiment provides a measuring device, which comprises:

[0051] The test platform 100 is used to support the roller body 10 to be measured.

[0052] The positioning mechanism 200 comprises at least two support assemblies 210.

[0053] The measuring mechanism 300 is arranged on the test platform 100 and located on one side of the roller body 10 to be measured.

[0054] The two support assemblies 210 are arranged oppositely, and a support area is formed between the two support assemblies 210. The roller body 10 to be measured is placed in the support area through the support assemblies 210.

[0055] The support assembly 210 comprises a positioning main body 211 and a connecting piece 220. The positioning main body 211 comprises a first support plate 2111 and a second support plate 2112 which are coupled in the horizontal direction. The first support plate 2111 and the second support plate 2112 are both provided with a first groove 212 arranged in the same horizontal direction and form an accommodation area. The connecting piece 220 is clamped in the accommodation area.

[0056] One end of the roller body 10 to be measured is rotationally connected with the connecting piece 220.

[0057] The two support assemblies 210 are oppositely arranged to form a support area for supporting the to-be-tested roller body 10, and the support assembly 210 comprises a positioning main body 211 and a connecting piece 220. The positioning main body 211 is connected in a form of buckling of a first support plate 2111 and a second support plate 2112. The connecting piece 220 can be connected in an external fastening connection and an internal rotating connection similar to a bearing. When the to-be-tested roller body 10 is installed, the connecting piece 220 is first connected through a key, a thread or the like, and the first support plate 2111 and the second support plate 2112 are respectively loaded on the connecting piece 220 along two side directions of the connecting piece 220 through a first groove 212, so as to realize the shaft end fixation of the to-be-tested roller body 10. It should be noted that the connection of the first support plate 2111 and the second support plate 2112 relative to the connecting piece 220 is an external buckling connection. That is, the existing technology adopts a bearing seat to realize the clamping of a suitable angle from the outside to the inside through the tile angle adjustment, which is more convenient. However, for the traction roller in the utility model, the traction roller itself has gravity, so that the clamping force is not required to be large, and the positioning requirement can be met only by the clamping of the first support plate 2111 and the second support plate 2112 and the mutual connection between the first support plate 2111 and the second support plate 2112. Therefore, the technical scheme provided by the utility model can meet the support requirement of the traction roller round run-out measurement. In order to further ensure the precision, the measurement mechanism 300 is arranged on the test platform 100 on one side of the to-be-tested roller body 10, so as to facilitate the measurement of the staff. Through the implementation of the above technical scheme, the technical problem of complicated connection process between the bearing and the bearing seat before the measurement device measures the traction roller in the prior art is solved, and the technical effect of improving the low work efficiency is achieved.

[0058] It should be noted that the connecting piece 220 in the embodiment is not limited to the provided bearing connection, and the bearing connection can also be replaced by magnetic suspension, gas bearing and the like. Meanwhile, the buckling connection between the first support plate 2111 and the second support plate 2112 can adopt a thread connection. The advantage of this scheme is that the first support plate 2111 and the second support plate 2112 only need to be provided with corresponding connecting holes, and meanwhile, a matching clamping groove and a clamping buckle can be arranged between the first support plate 2111 and the second support plate 2112. The advantage of this scheme is that the clamping groove and the clamping buckle can realize the simplified connection operation and also play a certain positioning role, which is convenient for the on-site connection of the operator. The shape of the first groove 212 is preferably a U-shaped groove, which is more matched with the fixing of the bearing outer ring. Alternatively, the first groove 212 can be arranged as any groove body according to the actual situation of the connecting piece 220.

[0059] Further, the positioning main body 211 further comprises an inner support plate 2113 clamped between the first outer support plate and the second outer support plate.

[0060] The inner support plate 2113 is provided with a second groove 213 arranged in the same horizontal direction as the first groove 212.

[0061] Further, the connecting piece 220 is a bearing, the inner diameter of the first groove 212 is smaller than the outer diameter of the bearing outer ring; the inner diameter of the second groove 213 is greater than the outer diameter of the bearing outer ring.

[0062] The main role of the inner support plate 2113 is to play a transition role when fixing the connecting piece 220. When connecting the connecting piece 220, first place the connecting piece 220 on the inner support plate 2113. The inner diameter of the second groove 213 of the inner support plate 2113 is greater than the outer diameter of the bearing outer ring, so the bearing outer ring can be easily placed on the inner support plate 2113. Then, after respectively clamping the first support plate 2111 and the second support plate 2112 along the two sides of the connecting piece 220, the first support plate 2111 and the second support plate 2112 are connected to each other by bolts. The first support plate 2111 and the second support plate 2112 first provide clamping force for the bearing outer ring. At the same time, the threaded connection between the first support plate 2111 and the second support plate 2112 can further prevent the horizontal side movement of the bearing. The bottom of the first support plate 2111 and the second support plate 2112 can be detachably connected to the test platform 100 by threaded connection, further controlling the vibration frequency of the bearing.

[0063] It can be seen that, in the embodiment, through the clamping structure of the first support plate 2111 and the second support plate 2112, the bearing seat is also convenient to store and saves space.

[0064] At the same time, according to a large amount of practical experience, the tolerance range of the first groove 212 and the second groove 213 relative to the outer diameter of the bearing is given in the embodiment, that is, the difference between the inner diameter of the first groove 212 and the outer diameter of the bearing is between 4mm-5mm; the difference between the inner diameter of the second groove 213 and the outer diameter of the bearing is between 4mm-5mm.

[0065] Further, as shown in Figure 4 The measurement mechanism 300 includes a measurement assembly 310, and the measurement assembly 310 includes a base 311, a column 312, a connecting rod 313, a table clamp 314, and a measuring instrument 315.

[0066] The column 312 is in sliding connection with the base 311 to enable the column 312 to move horizontally;

[0067] The connecting rod 313 and the table clamp 314 are in sliding connection with the column 312 and move vertically, the table clamp 314 is in rotational connection with the outermost connecting rod 313, and the plurality of connecting rods 313 are detachably connected;

[0068] The measuring instrument 315 is detachably connected to the table clamp 314, and the measuring instrument 315 is used for measuring the roller body 10 to be measured.

[0069] Further, the connecting rod 313 is provided with a locking piece 316, the locking piece 316 is inserted into the connecting rod 313 along the axial direction, and abuts against the stand 312, and the locking piece 316 is detachably connected with the connecting rod 313.

[0070] The locking piece 316 is used for limiting the sliding of the connecting rod 313 along the stand 312.

[0071] In the embodiment, the stand 312 is connected with the base 311 in a sliding connection mode through the sliding groove 321, so as to realize the movement of the measuring component relative to the base 311 in the horizontal direction, and the connecting rod 313 and the table clamp 314 are respectively sleeved with the stand 312 in a sleeving mode, and the locking function of the locking piece 316 is combined, so as to realize the adjustment in the vertical direction, the table clamp 314 is rotationally connected with the outermost connecting rod 313, and 360° multi-angle adjustment is realized, that is, the measurement angle of the measuring instrument 315 connected to the table clamp 314 can be adjusted.

[0072] Through the implementation of the above technical scheme, the fine adjustment of the measurement angle is realized when the measuring assembly 310 moves to the appropriate position, and the structure for the translational adjustment of the measuring assembly 310 along the measuring platform is also provided in the embodiment, and the structure is as follows:

[0073] Further, the measuring mechanism 300 further comprises a sliding assembly 320, the sliding assembly 320 comprises a support body 322 and a sliding groove 321 arranged in the support body 322, and the bottom of the base 311 is provided with a connecting protrusion, the connecting protrusion is in sliding connection with the sliding groove 321.

[0074] One side of the base 311 is provided with a protrusion matched with a groove in the sliding groove 321, the upper surface of the base 311 is provided with a locking knob, the base 311 is moved to the appropriate position during the measurement, and then the locking knob is rotated to fix the base 311. One side of the base 311 is provided with a placing hole of the stand 312, and the placing hole is used for connecting the stand 312.

[0075] Through the above setting, not only the precise adjustment of the measuring assembly 310 in multiple positions and multiple angles can be achieved, but also the disassembly and assembly are facilitated, and the labor intensity of the operator is greatly reduced.

[0076] As to the connection mode of the sliding groove 321 relative to the test platform 100, the test platform 100 can be directly provided with the sliding groove 321 in an integrated mode, or the test platform 100 can be improved into a split structure to support the sliding groove 321, and the specific structure is as follows:

[0077] Further, the test platform 100 comprises a first support frame 110 and a second support frame 120 arranged oppositely, and the support body 322 is detachably connected between the first support frame 110 and the second support frame 120.

[0078] The first support frame 110 and the second support frame 120 are each provided with a support assembly 210, and the roller body 10 to be tested is connected between the support assemblies 210 arranged oppositely.

[0079] The support body 322 is arranged at one side of the roller body 10 to be tested, and the measurement assembly 310 moves reciprocally along the axial direction of the roller body 10 to be tested through the sliding groove 321.

[0080] The test platform 100 is arranged in a split structure of the first support frame 110 and the second support frame 120, which can be adjusted for traction rollers of different lengths, thereby increasing the application scenarios of the device. In addition, the first support frame 110 and the second support frame 120 are each provided with a reinforcing rib 130 at the side and a foot plate 140 at the bottom, which not only ensures the support strength but also reduces the vibration frequency generated by the traction roller during rotation.

[0081] The specific operation process of the measurement device provided in the embodiment is as follows:

[0082] When the traction roller is placed on the frame body surface positioning mechanism 200, the rolling bearing is installed on the core shaft at both ends, the bearing is pushed to the core shaft key groove positioning position, and the bearing is placed in the support area composed of the first support plate 2111 and the second support plate 2112 and is fixed. The traction roller is rotated, the measurement position and the measurement angle of the measuring instrument 315 are adjusted through the measurement mechanism 300, and data collection work is performed.

[0083] Embodiment two

[0084] For the position adjustment of the measurement assembly 310 along the test platform 100 in the embodiment one, the embodiment further provides a more simple and widely applicable technical solution, which is as follows:

[0085] Further, the base 311 is a magnetic base 311, and the magnetic base 311 comprises a knob, which is used to control the connection or separation of the base 311 and the test platform 100.

[0086] Further, the test platform 100 is provided with a magnetic area along one side of the support area, and the magnetic area is used for magnetic connection with the magnetic base 311.

[0087] The magnetic base 311 can ensure that the device micrometer is firmly adsorbed on the object to be measured during the measurement process, and can remain stable even on an inclined or vertical surface. Moreover, the adsorption and release of the magnetic base 311 can be completed by simple knob operation, which makes it easy for the user to place the device in the appropriate position without the need for additional fixing tools.

[0088] At the same time, the test platform 100 can also be provided with a corresponding magnetic area, and the test platform 100 can be provided with a split structure as in Embodiment One, connected between the first support frame 110 and the second support frame 120 by a plate-shaped support body. Due to the advantages of the magnetic base 311, the plate-shaped support body can be arranged at any angle, as long as it can ensure that the test assembly is located in a suitable position for testing. The test platform 100 can also be provided with an integrally formed table type, and a corresponding magnetic part is arranged in the magnetic area, or the magnetic part is fixed to the table body. Similarly, the above-mentioned effects can be achieved.

[0089] So far, the embodiments of the present disclosure have been described in detail. In order to avoid obscuring the concept of the present disclosure, some details known in the art are not described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein according to the above description.

Claims

1. A measuring device, characterized in that The utility model relates to a kind of test platform and measurement mechanism for roll body, including: Test platform (100), the test platform (100) is used to support the roll body (10) to be measured; Positioning mechanism (200), the positioning mechanism (200) includes at least two support components (210); Measuring mechanism (300), the measuring mechanism (300) is arranged in the test platform (100), and it is located in one side of the roll body (10) to be measured; Wherein, two the support components (210) are oppositely arranged, and support area is formed between two the support components (210), and the roll body (10) to be measured is placed in the support area by the support component (210); The support component (210) includes positioning main body (211) and connecting piece (220), the positioning main body (211) includes first support plate (2111) and second support plate (2112) that are buckled along horizontal direction, first recess (212) is arranged along the same horizontal direction in the first support plate (2111) and the second support plate (2112), and forms accommodating area, and the connecting piece (220) is clamped in the accommodating area; One end of the roll body (10) to be measured is rotatably connected with the connecting piece (220).

2. The measuring device of claim 1, wherein, The positioning main body (211) further includes inner support plate (2113), and the inner support plate (2113) is clamped between the first support plate (2111) and the second support plate (2112); The inner support plate (2113) is provided with second recess (213) arranged along the same horizontal direction with the first recess (212).

3. The measuring device of claim 2, wherein, The connecting piece (220) is bearing, the inner diameter of the first recess (212) is less than the outer diameter of bearing outer ring;The inner diameter of the second recess (213) is greater than the outer diameter of bearing outer ring.

4. The measuring device of claim 1, wherein, The measuring mechanism (300) includes measuring assembly (310), and the measuring assembly (310) includes base (311), stand (312), connecting rod (313), table clamp (314) and measuring instrument (315); The stand (312) is slidably connected with the base (311) to move the stand (312) horizontally; The connecting rod (313) and the table clamp (314) are slidably connected with the stand (312) and move vertically, the table clamp (314) is rotatably connected with the outermost connecting rod (313), and the connecting rods (313) are detachably connected; The measuring instrument (315) is detachably connected to the table clamp (314), and the measuring instrument (315) is used to measure the roll body (10) to be measured.

5. The measuring device of claim 4, wherein, The measuring mechanism (300) further includes sliding assembly (320), and the sliding assembly (320) includes support main body (322) and sliding groove (321) arranged in the support main body (322), and the bottom of the base (311) is provided with connecting lug, and the connecting lug is slidably connected with the sliding groove (321).

6. The measuring device of claim 4, wherein, The base (311) is a magnetic base (311), which comprises a knob for controlling the connection or separation of the base (311) and the test platform (100).

7. The measuring device of claim 4, wherein, The connecting rod (313) is provided with a locking piece (316) which is inserted into the connecting rod (313) along the axial direction and abuts against the stand column (312), and the locking piece (316) is detachably connected with the connecting rod (313). The locking piece (316) is used for limiting the sliding of the connecting rod (313) along the stand column (312).

8. The measuring device of claim 5, wherein, The test platform (100) comprises oppositely arranged first and second support frames (110, 120), and the support body (322) is detachably connected between the first and second support frames (110, 120). The first and second support frames (110, 120) are each provided with a support assembly (210), and the to-be-tested roller body (10) is connected between the oppositely arranged support assemblies (210). The support body (322) is arranged on one side of the to-be-tested roller body (10), and the measurement assembly (310) reciprocally moves along the axial direction of the to-be-tested roller body (10) through the sliding groove (321).

9. The measuring device of claim 6, wherein, The test platform (100) is provided with a magnetic area on one side of the support area, and the magnetic area is used for magnetic connection with the magnetic base (311).

10. The measuring device of claim 3, wherein, The difference between the inner diameter of the first groove (212) and the outer diameter of the bearing is between 4mm-5mm; The difference between the inner diameter of the second groove (213) and the outer diameter of the bearing is between 4mm-5mm.

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