CN217585635U - Multi-bearing coaxiality calibrating device - Google Patents

Abstract

The utility model discloses a multiaxis holds axiality calibrating device belongs to calibration technical field. The device comprises two reference bearings, a calibrated bearing, two reference assemblies, a calibration assembly and two adjusting assemblies. The two reference bearings are coaxially arranged, and each reference bearing is connected with one first support; the calibrated bearing is connected with the second bracket; each datum bearing is fixedly provided with a datum assembly, and a datum hole coaxial with the datum bearing is formed in the datum assembly; the calibration assembly comprises a calibration sleeve and a calibration line, the calibration sleeve is connected with the calibrated bearing, a calibration hole coaxial with the calibrated bearing is formed in the calibration sleeve, and the calibration line penetrates through the datum hole and the calibration hole; the adjusting assembly is in threaded connection with the reference assembly and can lock the calibration line. The device can adjust the tightness of the calibration line while realizing the calibration of the coaxiality of the multi-bearing, so that the device has the operation flexibility and improves the calibration precision of the calibrated bearing.

Description

Multi-bearing coaxiality calibrating device

Technical Field

The utility model relates to a calibration technical field, concretely relates to multiaxis holds axiality calibrating device.

Background

In the aircraft cabin interior trim, the suitcase is used for depositing passenger's luggage, and the suitcase adopts the suitcase support to fix on the aircraft, and the cabin body that partly pass through location riveted mode of suitcase support is connected with the aircraft is installed to the bearing on the other part, and the bearing can hang and connect the support suitcase to with suitcase fixed mounting on the aircraft.

However, due to manufacturing and assembling tolerances, the luggage carrier supports in the same row on the whole airplane cannot be guaranteed to be in the same straight line, and the bearings on the luggage carrier supports cannot be guaranteed to be in the same axis, so that the whole consistency cannot be guaranteed after the luggage carrier is installed, the problem that the luggage carrier which is inclined after being installed is deformed due to the extrusion of the luggage carrier is solved, and the whole appearance is influenced. Therefore, in order to keep the multiple suitcases in the same straight line after being installed, the bearings on the same row of suitcase supports need to be calibrated, so as to ensure that the coaxiality of the bearings meets the requirement.

In the prior art, a front bracket bearing and a rear bracket bearing are taken as references, and a calibrated bracket bearing between the front bracket bearing and the rear bracket bearing is adjusted through a calibration line, so that the bracket bearings are positioned on the same axis. However, the existing calibration device cannot adjust the tightness of the calibration line, so that the use flexibility and convenience of the calibration device are reduced. When the calibration line is loosened, the adjustment of the tightening of the calibration line cannot be performed, thereby reducing the calibration accuracy of the apparatus.

Based on the above, there is a need for a multi-bearing coaxiality calibration apparatus to solve the problems in the prior art.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a multiaxis holds axiality calibrating device, the device can also adapt to the elasticity of calibration line and adjust when realizing the axiality calibration to a plurality of bearings for this calibrating device has the flexibility of operation, and has improved the precision of the axiality of a plurality of bearings of calibration effectively.

To achieve the purpose, the utility model adopts the following technical proposal:

a multi-bearing concentricity calibration device comprising:

the two reference bearings are coaxially arranged, and each reference bearing is fixedly connected with one first support;

the calibrated bearing is fixedly connected with the second bracket, and the calibrated bearing is positioned between the two reference bearings;

each datum bearing is fixedly provided with one datum assembly, a datum hole is formed in the datum assembly, and the datum hole and the datum bearing are located on the same axis;

the calibration assembly comprises a calibration sleeve and a calibration line, the calibration sleeve is fixedly connected with the calibrated shaft, a calibration hole is formed in the calibration sleeve, the calibration hole and the calibrated shaft are positioned on the same axis, and the calibration line penetrates through the two datum holes and the calibration hole;

and the adjusting assembly is in threaded connection with the reference assembly and can lock the calibration line.

Optionally, the reference assembly includes a reference sleeve and a nut, one end of the reference sleeve passes through the reference bearing and is in threaded connection with the nut, the other end of the reference sleeve is connected with the adjusting assembly, and the reference sleeve is internally provided with the reference hole.

Optionally, the reference hole includes a threaded portion and a light hole portion, the threaded portion is in threaded connection with the adjusting assembly, the light hole portion is stepped, and an inner diameter of the light hole portion gradually decreases in a direction away from the threaded portion.

Optionally, an inner diameter of the threaded portion is larger than a maximum inner diameter of the aperture portion.

Optionally, the minimum inner diameter of the aperture portion is equal to the outer diameter of the calibration line.

Optionally, the adjusting component comprises a screw portion and a fixing portion, the screw portion is in threaded connection with the reference hole, an adjusting hole coaxial with the reference hole is formed in the adjusting component, and the calibration line penetrates through the adjusting hole and is fixedly connected with the fixing portion.

Optionally, the adjusting assembly includes a sleeve portion and a fixing portion, the reference assembly has an external thread, the inner surface of the sleeve portion is threaded and is in threaded connection with the reference assembly, an adjusting hole coaxial with the reference hole is formed in the adjusting assembly, and the calibration line is inserted through the adjusting hole and is fixedly connected with the fixing portion.

Optionally, the outer peripheral surface of the fixing portion is annularly provided with an annular groove, and the calibration line is wound in the annular groove.

Optionally, a lead groove is formed in one side of the fixing portion, the lead groove is communicated with the annular groove, and the calibration line penetrates through the lead groove and is wound around the annular groove.

Optionally, the calibration sleeve includes a main body portion and a flange portion formed at one end of the main body portion and protruding outward annularly, the main body portion is disposed through the through hole of the calibrated bearing, and one side of the flange portion is tightly attached to the surface of the second bracket.

The utility model provides a multiaxis holds axiality calibrating device's beneficial effect lies in: the device comprises two reference components, a calibration component and two adjusting components, wherein the two reference components are fixedly arranged on two reference bearings, the axes of the two reference bearings and the axes of the two reference bearings are on the same axis, the calibration component is fixedly arranged on a calibrated bearing, a calibration line penetrates through the two reference components and the calibration component, and whether the calibrated bearing and the reference bearing are on the same axis is calibrated by observing whether the calibration line is positioned in the center of a calibration hole; in addition, the adjusting component is in threaded connection with the reference component and can lock the calibration line, so that the tightness of the calibration line can be adaptively adjusted, the calibration device has operation flexibility, and the calibration precision of the calibrated bearing is effectively improved.

Drawings

Fig. 1 is an assembly structure diagram of a multi-bearing coaxiality calibration apparatus provided by the present invention;

FIG. 2 isbase:Sub>A partial sectional view taken along A-A of FIG. 1;

fig. 3 is a cross-sectional view of a calibration assembly provided by the present invention;

FIG. 4 is a partial cross-sectional view taken along line B-B of FIG. 1;

fig. 5 is a cross-sectional view of an adjustment assembly provided by the present invention;

fig. 6 is a side view of a second side block provided by the present invention.

In the figure:

1. a reference bearing; 2. a calibrated bearing; 3. a first bracket; 4. a second bracket; 5. a reference component; 51. a reference sleeve; 511. a small diameter section; 512. a large diameter section; 52. a nut; 53. a first gasket; 54. a second gasket; 55. a reference hole; 551. a threaded portion; 552. a light aperture portion; 6. calibrating the component; 61. calibrating the sleeve; 611. a main body portion; 612. a flange portion; 62. calibrating the line; 63. calibrating the hole; 7. an adjustment assembly; 71. a fixed part; 711. a shaft lever; 712. a first side block; 713. a second side block; 7131. a lead slot; 714. an annular groove; 72. a screw section; 73. and adjusting the hole.

Detailed Description

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar parts throughout, or parts having the same or similar functions. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" are to be construed broadly and can include, for example, fixed or removable connections, mechanical or electrical connections, direct connections, indirect connections through an intermediary, communication between two elements, or an interaction between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the description of the present invention, unless otherwise expressly specified or limited, the recitation of a first feature "on" or "under" a second feature may include the recitation of the first and second features being in direct contact, and may also include the recitation of the first and second features not being in direct contact, but being in contact with another feature between them. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The technical solution of the present invention is further explained by the following embodiments with reference to the drawings.

Currently, an existing auxiliary tool for calibrating a luggage carrier mainly uses two carrier bearings located in front of and behind a calibrated carrier bearing and located on the same axis as a reference, a calibration line passes through the calibrated carrier bearing and the carrier bearing as the reference, and the coaxiality between the calibrated carrier bearing and the calibrated carrier bearing is detected and calibrated by measuring whether the axis of the calibration line coincides with the axis of the calibrated bearing. However, the conventional calibration device cannot adjust the tightness of the calibration line, and when the calibration line is loosened, the device cannot adjust the tightness of the calibration line, so that the calibration precision of the device is reduced, and the flexibility and convenience in use of the device are also reduced. Therefore, it is a necessary requirement to design a multi-bearing coaxiality calibration device which can adjust the tightness of the calibration line while adjusting and calibrating the coaxiality of the bracket bearing, thereby improving the flexibility and the calibration accuracy of the whole device.

As shown in fig. 1 to 2, the multi-bearing coaxiality calibration apparatus of the present embodiment includes two reference bearings 1, a calibrated bearing 2, two reference assemblies 5, a calibration assembly 6, and two adjustment assemblies 7.

The two reference bearings 1 are coaxially arranged, the first support 3 is provided with a first mounting hole (not shown in the figure), and each reference bearing 1 can be fixedly connected with one first support 3 through the first mounting hole; the second bracket 4 is provided with a second mounting hole (not shown in the figure), and the calibrated bearing 2 can be fixedly connected with the second bracket 4 through the second mounting hole. In the present embodiment, the second bracket 4 is provided between the two first brackets 3 to facilitate the calibration of the calibrated bearing 2 based on the reference bearings 1 at both ends.

The reference bearing 1 is provided with a bearing hole, each reference assembly 5 is fixedly connected with one reference bearing 1 through the bearing hole, a reference hole 55 is formed in the reference assembly 5, and the reference hole 55 and the reference bearing 1 are located on the same axis, so that the axes of the reference assembly 5 and the reference bearing 1 coincide.

The calibration assembly 6 comprises a calibration sleeve 61 and a calibration line 62, a through hole is formed in the calibrated bearing 2, the calibration sleeve 61 penetrates through the through hole and is fixedly connected with the calibrated bearing 2, a calibration hole 63 is formed in the calibration sleeve 61, the calibration hole 63 and the calibrated bearing 2 are located on the same axis, and the calibration line 62 penetrates through two reference holes 5 and the calibration hole 63. Each adjustment assembly 7 is threaded with reference assembly 5 and is capable of locking the end of calibration line 62.

By the device, the position of the calibration line 62 in the calibration hole 63 is observed, whether the calibrated bearing 2 and the two reference bearings 1 are positioned on the same axis can be judged, and then the position of the calibrated bearing 2 is adjusted up and down, left and right by loosening two fastening screws on the second bracket 4, so that the axis of the calibration line 62 is superposed with the axis of the calibration hole 63, and the calibration adjustment of the coaxiality of the calibrated bearing 2 is realized; in addition, the device can also adjust the tightness of the calibration line 62 through the adjusting component 7, thereby eliminating the situation that the calibration precision is reduced when the calibration line 62 is loosened, and improving the operation flexibility and stability of the whole device.

As shown in fig. 1 to 3, the reference assembly 5 includes a reference sleeve 51, a nut 52, a first spacer 53, and a second spacer 54.

The reference sleeve 51 comprises a small-diameter section 511 and a large-diameter section 512, wherein an external thread is formed on the small-diameter section 511, and the external thread penetrates through a bearing hole formed in the reference bearing 1 to be in threaded connection with the nut 52, so that the reference sleeve 51 is convenient to mount and dismount. The large diameter section 512 is connected to the adjusting assembly 7, and a reference hole 55 penetrating through the small diameter section 511 and the large diameter section 512 is formed in the reference sleeve 51, so that the calibration line 62 can be fixedly connected to the adjusting assembly 7 through the reference hole 55. After the nut 52 is screwed to the reference sleeve 51, the side of the nut 52 close to the reference bearing 1 can be closely attached to the surface of the first bracket 3, and if the reference sleeve 51 and the reference bearing 1 rotate relative to the first bracket 3, the nut 52 is adjusted to be tightened, thereby avoiding the rotation of the reference bearing 1 and the reference sleeve 51.

The first gasket 53 is attached between the first bracket 3 and the nut 52, so that the contact area between the nut 52 and the first bracket 3 is increased, and the deviation between the axis of the reference hole 55 and the axis of the reference bearing 1 caused by the looseness of the nut 52 is avoided; the second spacer 54 is snugly provided between the first bracket 3 and the large diameter section 512 so that the reference sleeve 51 can be closely fitted to the first bracket 3.

Through the arrangement, the reference bearing 1 and the reference assembly 5 can be arranged on the first support 3 in a fixed state, and the reference hole 55 and the first mounting hole formed in the first support 3 are maintained on the same axis, so that the reference bearings 1 at two ends are ensured to be in the coaxial position, and the subsequent operation step of coaxiality calibration of the calibrated bearing 2 is facilitated.

As shown in fig. 3, in the present embodiment, the reference hole 55 includes a threaded portion 551 and a unthreaded portion 552, the threaded portion 551 is screwed to the adjustment assembly 7 having threads, and the adjustment of the tightness of the calibration wire 62 is achieved by screwing the adjustment assembly 7. The light hole portion 552 has a step shape, and has an inner diameter gradually decreasing in a direction away from the screw portion 551, and the calibration line 62 is inserted into the light hole portion 551 from the end having the smallest inner diameter, so that the calibration line 62 can be held on the same axis as the reference hole 55.

Through the setting, realized benchmark hole 55 to calibration line 62 coaxial positioning and with adjusting part 7 be connected to screwing up and becoming flexible through adjusting part 7, make this multiaxis hold axiality calibrating device can adjust calibration line 62's elasticity, easily operation, and improved calibration precision effectively, guaranteed calibration in-process calibration line 62's stability.

Further, the diameter of the threaded portion 551 is larger than the maximum diameter of the aperture portion 552, so that the adjusting assembly 7 can only rotate helically in the threaded portion 551, and the situation that the adjusting assembly 7 rotates to the aperture portion 552 to cause abrasion damage to the aperture portion 552 is avoided.

It will be appreciated that in some other embodiments, the diameter of the threaded portion 551 may be less than the largest inner diameter of the aperture portion 552, so as to avoid the wear damage of the aperture portion 552 caused by the adjustment assembly 7 when the adjustment assembly 7 is rotated into the aperture portion. Therefore, those skilled in the art can select the operation condition according to the specific condition.

In the present embodiment, the minimum diameter of the light hole portion 552 is equal to the outer diameter of the calibration line 62, so that the calibration line 62 can be positioned and disposed in the light hole portion 552, and can be kept in a coaxial position with the reference hole 55, thereby avoiding the situation that the axis of the calibration line 62 deviates from the reference hole 55, and effectively improving the calibration accuracy.

Further, to avoid the problem of difficult threading of the calibration wire 62 due to the minimum diameter being too long, only a small section is formed in the unthreaded bore portion 552, with the remainder being formed in the maximum diameter section, so that the calibration wire 62 can be quickly threaded through the unthreaded bore portion 552.

Referring to fig. 4, the calibration sleeve 61 includes a main body portion 611 and a flange portion 612 formed at one end of the main body portion 611 to protrude outward annularly, wherein the main body portion 611 is of a cylindrical shape and is disposed through the through hole of the calibrated bearing 2; after the main body portion 611 is fixedly arranged on the calibrated bearing 2, one side of the flange portion 612 can be attached to the surface of the second bracket 4, so that the calibration sleeve 61, the calibrated bearing 2 and the second mounting hole can be located on the same axis, when the calibrated bearing 2 and the calibration sleeve 61 rotate, the flange portion 612 is adjusted to be closely attached to the surface of the second bracket 4, thereby limiting the rotation of the calibration sleeve 61 and the calibrated bearing 2, and facilitating the coaxiality calibration of the calibrated bearing 2 after the calibration line 62 passes through the calibration sleeve 61.

In the embodiment, a nylon line is selected as the calibration line 62, so that the calibration line 62 has a certain tensile force and is low in cost. It is understood that a carbon wire, a steel wire, or the like may also be selected as the calibration line 62. Accordingly, one skilled in the art can select a calibration line 62 made of different materials based on actual cost and production requirements.

Alternatively, referring to fig. 5, an adjusting hole 73 coaxial with the reference hole 55 is formed in the adjusting assembly 7, and in the present embodiment, the adjusting assembly 7 includes a fixing portion 71 and a screw portion 72, and the fixing portion 71 is disposed at one end of the screw portion 72; the screw portion 72 is in threaded connection with the reference hole 5, and the calibration line 62 penetrates through the adjusting hole 73 to be fixedly connected to the fixing portion 71, so that the calibration line 62 is convenient to fixedly install by workers, and the calibration line 62 is convenient to be released from the fixing portion 71.

It should be noted that, in another embodiment, the adjusting assembly 7 includes a fixing portion 71 and a sleeve portion, and an adjusting hole 73 penetrating through the fixing portion 71 and the sleeve portion is formed in the adjusting assembly 7, the fixing portion 71 is disposed at one end of the sleeve portion, and the calibration line 62 can be fixedly connected to the fixing portion 71 after passing through the adjusting hole 73; the inner surface of the sleeve part is provided with threads, correspondingly, the reference component 5 is provided with external threads, and the sleeve part is in threaded connection with the reference component 5, so that the adjusting component 7 is in threaded connection with the reference component 5, the tightness of the calibration line 62 can be adjusted by screwing the adjusting component 7, and a worker can conveniently fixedly connect the calibration line 62 to the adjusting component 7 and/or remove the calibration line from the adjusting component 7.

Further, with continued reference to fig. 5, the fixing portion 71 includes a shaft 711, a first side block 712 and a second side block 713, two ends of the shaft 711 are fixedly connected to the first side block 712 and the second side block 713, respectively, and the diameter of the shaft 711 is smaller than that of the first side block 712 and the second side block 713, so that an annular groove 714 is formed on the outer circumferential surface of the fixing portion 71, so that the fixing portion 71 is in an "i" shape as a whole. One side of the first side block 712 is fixedly connected with the screw part 72 such that the fixing part 71 is connected with the screw part 72; the calibration wire 62 can be passed out of the end of the second side block 713 away from the shaft 711 and wound at the annular groove 714, thereby connecting the calibration wire 62 with the fixing portion 71. Through the limiting function of the first side block 712 and the second side block 713, the calibration line 62 is prevented from being separated from the fixing part 71, so that the whole device is more stable and reliable, and the working efficiency of operators is improved.

Further, referring to fig. 6, at the edge of the second side block 713, a lead groove 7131 is opened along the second side block 713 in a radial direction, and the calibration wire 62 passing through the fixing portion 71 can pass through the lead groove 7131 and be wound at the annular groove 714. Through the arrangement that the calibration wire 62 is clamped in the lead slot, the phenomena that the calibration wire 62 slides and is connected unstably when the calibration wire 62 is wound in the annular groove 714 through the edge of the second side block 713 are avoided; the problem of frictional wear of the calibration line 62 at the edge of the second side block 713 is also prevented.

It should be noted that, in other embodiments, the wire guiding slot 7131 may also be opened on the surface of the second side block 713 and be formed through the second side block 713 to form a wire guiding slot, so that the calibration wire 62 threaded from the second side block 713 can enter through the wire guiding slot and be wound around the annular groove 714; alternatively, the wire guiding groove 7131 may be opened at one side of the shaft 711, and the calibration wire 62 may be passed through the wire guiding groove 7131 and wound around the annular groove 714, so that the calibration wire 62 may be stably mounted on the fixing portion 71, and the phenomenon of friction and abrasion of the calibration wire 62 may be avoided. The utility model discloses not injecing the position that lead wire groove 7131 seted up on fixed part 71, as long as can satisfy with calibration line 62 stable connection on fixed part 71, and prevent calibration line 62's wearing and tearing, just all be within the protection scope of the utility model.

The multi-bearing coaxiality calibration apparatus can detect the coaxiality of the calibrated bearing 2 and the reference bearing 1 by observing the distance between the axis of the calibration line 62 and the axis of the calibration sleeve 61. When the axial center of the calibration line 62 and the axial center of the calibration sleeve 61 are observed not to be on the same straight line, the second bracket 4 assembly with the calibrated bearing 2 is moved by loosening the fastening screws of the two assemblies connected with the second bracket 4, and then the position of the calibrated bearing 2 is adjusted up and down and left and right, so that the axial center of the calibration line 62 is finally coincided with the axial center of the calibration sleeve 61, and the fastening screws of the assemblies connected with the two second brackets 4 are tightened, which indicates that the adjustment of the calibrated bearing 2 is completed, thereby realizing the coaxial adjustment between the calibrated bearing 2 and the reference bearing 1.

One by calibration bearing 2 after adjusting, can regard as next by calibration bearing 2's benchmark bearing, carry out the axiality adjustment to other suitcase supports of homonymy in proper order for the bearing that is located on all suitcase supports of homonymy finally all is in on the same axis, thereby has realized the utility model discloses in the purpose to the adjustment calibration of multi-bearing axiality.

It can be understood that the multi-bearing coaxiality calibration device provided by the embodiment can also be applied to the calibration of structures arranged in the same row except for the luggage carrier.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (10)

1. A multi-bearing coaxiality calibration device, comprising:

the two reference bearings (1) are coaxially arranged, and each reference bearing (1) is fixedly connected with one first support (3);

the calibrated bearing (2), the calibrated bearing (2) is fixedly connected with a second bracket (4), and the calibrated bearing (2) is positioned between the two reference bearings (1);

each datum bearing (1) is fixedly provided with one datum assembly (5), a datum hole (55) is formed in each datum assembly (5), and the datum hole (55) and the datum bearing (1) are located on the same axis;

the calibrating device comprises a calibrating component (6), wherein the calibrating component (6) comprises a calibrating sleeve (61) and a calibrating line (62), the calibrating sleeve (61) is fixedly connected with the bearing (2) to be calibrated, a calibrating hole (63) is formed in the calibrating sleeve (61), the calibrating hole (63) and the bearing (2) to be calibrated are located on the same axis, and the calibrating line (62) penetrates through two reference holes (55) and the calibrating hole (63);

two adjusting assemblies (7), wherein the adjusting assemblies (7) are in threaded connection with the reference assembly (5) and can lock the calibration line (62).

2. Multiaxial bearing coaxiality calibration apparatus according to claim 1 wherein the reference assembly (5) comprises a reference sleeve (51) and a nut (52), one end of the reference sleeve (51) passing through the reference bearing (1) and being in threaded connection with the nut (52), the other end of the reference sleeve (51) being connected with the adjustment assembly (7), the reference hole (55) being formed in the reference sleeve (51).

3. The multi-bearing concentricity calibration apparatus according to claim 1, wherein the reference hole (55) includes a threaded portion (551) and an aperture portion (552), the threaded portion (551) is threadedly connected to the adjustment assembly (7), the aperture portion (552) is stepped, and an inner diameter of the aperture portion (552) is gradually reduced in a direction away from the threaded portion (551).

4. The multi-bearing concentricity calibration device of claim 3, wherein the inner diameter of the threaded portion (551) is larger than the maximum inner diameter of the aperture portion (552).

5. The multi-bearing concentricity calibration device of claim 3, wherein the minimum inner diameter of the aperture portion (552) is equal to the outer diameter of the calibration line (62).

6. The multi-bearing coaxiality calibration apparatus according to claim 1, wherein the adjustment assembly (7) includes a screw portion (72) and a fixing portion (71), the screw portion (72) is in threaded connection with the reference hole (55), an adjustment hole (73) coaxial with the reference hole (55) is formed in the adjustment assembly (7), and the calibration wire (62) is inserted into the adjustment hole (73) and is fixedly connected with the fixing portion (71).

7. The multi-bearing coaxiality calibration apparatus according to claim 1, wherein the adjusting member (7) includes a sleeve portion and a fixing portion (71), the reference member (5) has an external thread, an inner surface of the sleeve portion is threaded and is in threaded connection with the reference member (5), an adjusting hole (73) coaxial with the reference hole (55) is formed in the adjusting member (7), and the calibration line (62) is inserted through the adjusting hole (73) and is fixedly connected with the fixing portion (71).

8. Multiaxial bearing coaxiality calibration apparatus according to claim 6 or 7 wherein the fixed portion (71) is provided with an annular groove (714) around its outer circumferential surface, and the calibration wire (62) is wound around and disposed in the annular groove (714).

9. The multi-bearing coaxiality calibration apparatus according to claim 8, wherein a lead groove (7131) is formed in one side of the fixing portion (71), the lead groove (7131) is communicated with the annular groove (714), and the calibration wire (62) is inserted into the lead groove (7131) and wound around the annular groove (714).

10. The multi-bearing coaxiality calibration apparatus according to claim 1, wherein the calibration sleeve (61) includes a main body portion (611) and a flange portion (612) formed at one end of the main body portion (611) to protrude annularly outward, the main body portion (611) is disposed through the through hole of the calibrated bearing (2), and one side of the flange portion (612) is in close contact with the surface of the second bracket (4).

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