CN107514958B

CN107514958B - Multifunctional shaft assembly form and position tolerance measuring instrument and measuring method

Info

Publication number: CN107514958B
Application number: CN201710947571.XA
Authority: CN
Inventors: 陈建魁; 龚雷锋
Original assignee: Huazhong University of Science and Technology
Current assignee: Huazhong University of Science and Technology
Priority date: 2017-10-12
Filing date: 2017-10-12
Publication date: 2023-06-02
Anticipated expiration: 2037-10-12
Also published as: CN107514958A

Abstract

The invention belongs to the technical field related to form and position tolerance measuring equipment and discloses a multifunctional shaft assembly form and position tolerance measuring instrument which comprises a magnetic base station, a first cross shaft group, a second cross shaft group, a rotating body, a measuring ruler, a first platform, a second platform, a first measuring meter group and a second measuring meter group, wherein the magnetic base station is used for being adsorbed on a reference platform, the first cross shaft group is installed on the magnetic base station and can realize X-axis direction adjustment, the second cross shaft group is installed on the first cross shaft group and can realize Y-axis direction adjustment, the rotating body is installed on the second cross shaft group and can realize Z-axis direction adjustment, the measuring ruler is installed on the rotating body, and the first platform and the second platform are respectively installed on the measuring ruler. The invention also discloses a corresponding multifunctional measuring method. The invention can not only execute the form and position tolerance measurement between the part to be measured and the platform or between the parts with high precision, but also has the characteristics of compact structure, convenient operation, low cost, wide applicability and the like.

Description

Multifunctional shaft assembly form and position tolerance measuring instrument and measuring method

Technical Field

The invention belongs to the technical field related to form and position tolerance measuring equipment, and particularly relates to a multifunctional shaft assembly form and position tolerance measuring instrument and a measuring method, which are not only suitable for measuring form and position tolerance of a single part in a compact structure and convenient operation mode, but also can execute various form and position tolerance measuring processes between the part and a platform or between the part and the part with high precision when the equipment is assembled.

Background

With the continuous advancement of industry, society requires more and more new equipment, especially special equipment, which needs to make difference measurements, i.e. form and position tolerance measurements, between the actual shape or mutual position of the points, lines, faces that make up the geometric features of the parts and the shape and mutual position specified by the ideal geometry after machining. Because form and position tolerance directly influences the performance requirement, the coordination property, the interchangeability, the service life and the like of equipment workpieces, the accuracy of the measurement result belongs to an index which is focused on in the industrial manufacturing field.

Some form and position tolerance measurement schemes have been proposed in the prior art. For example, cn201410631036.X proposes a form and position tolerance integrated measuring device, in which by integrating a flat plate, a table frame, a guide rail and a rotary table, it is suitable for detecting form and position tolerance of most of medium and small mechanical parts; for another example, CN202770349U discloses a geometric tolerance measuring device, which uses a reference shaft arranged on the device as a reference, a V-shaped block with a downward opening is arranged on the reference shaft, a measuring arm which can stretch along the direction of the reference shaft and a measuring arm which can rotate around the end of the V-shaped block are arranged at the upper end of the V-shaped block, and a measuring meter is arranged on the measuring arm and is used for measuring geometric tolerance, straightness and/or circle runout of shaft parts or straight rods parallel to the reference shaft.

However, further researches show that the conventional device is generally only suitable for measuring the size and tolerance of the parts, and cannot precisely measure the form and position tolerance between the parts and the platform or between the parts, and meanwhile, the conventional device has the problems of complex structure, inconvenient operation or high cost. Accordingly, there is a need in the art for further improvements in order to better meet the various needs of actual manufacturing.

Disclosure of Invention

Aiming at the defects or improvement demands of the prior art, the invention provides a multifunctional shaft assembly form and position tolerance measuring instrument and a measuring method, wherein the specific design is carried out by combining the actual demands in industrial application, the research and improvement are carried out on the whole construction layout of the measuring instrument and the specific structure and the arrangement mode of key components such as a cross shaft group, a rotating body, a working platform and the like, and accordingly, the form and position tolerance measurement between the part to be measured and the platform or between the part and the part can be executed with high precision, and meanwhile, the measuring instrument has the characteristics of compact structure, convenience in operation, low cost, wide applicability and the like.

In order to achieve the above object, according to one aspect of the present invention, there is provided a multifunctional shaft assembly form and position tolerance measuring apparatus, the measuring apparatus including a magnetic base, a first cross shaft group, a second cross shaft group, a rotating body, a measuring scale, a first platform, a second platform, a first measuring meter group and a second measuring meter group, characterized in that:

The magnetic base station comprises a first base, a magnetic seat arranged in the first base and a support fixed on the upper surface of the first base, wherein the magnetic base station is used as a mounting and supporting foundation of other components of the whole measuring instrument and is adsorbed on a reference platform on which a part to be measured is placed through magnetic force;

the first cross shaft group is directly arranged on the magnetic base, and comprises a first cross shaft, a first ejector rod, a first compression spring and a first gasket, wherein the first cross shaft is horizontally hinged with the support through one end of the first cross shaft; the first ejector rod vertically penetrates through the first cross shaft and is then screwed into a threaded hole of the first base; the first compression spring and the first gasket are respectively sleeved on the first ejector rod, the head end and the tail end of the first compression spring respectively press the lower surface of the first cross shaft and the upper surface of the first base, and the first gasket is arranged between the upper surface of the first cross shaft and the first ejector rod; in this way, by rotating the knob at the upper end of the first ejector rod, the first cross and other components disposed thereon are adjusted to remain parallel in the X-axis direction relative to the reference plane;

The second cross shaft group is arranged on the first cross shaft group and comprises a second base, a second cross shaft, a second ejector rod, a second compression spring and a second gasket, wherein the second base is fixed on the upper surface of the first cross shaft and is used as a mounting foundation for other elements of the second cross shaft group; the second cross shaft is horizontally hinged with the second base through one end of the second cross shaft; the second ejector rod is vertically screwed into a threaded hole of the second cross shaft, and the second compression spring and the second gasket are sleeved on the second ejector rod; in addition, the head end and the tail end of the second compression spring respectively press the lower surface of the second cross shaft and the upper surface of the second base, and the second gasket is arranged between the upper surface of the second ejector rod and the lower surface of the second base; in this way, the second cross and other components disposed thereon are adjusted to remain parallel in the Y-axis direction relative to the reference plane by rotating the knob at the upper end of the second carrier bar;

the rotating body is arranged on the second cross shaft group and is used for driving other components arranged on the rotating body to rotate in the Z-axis direction together while executing the rotation of the rotating body in the Z-axis direction relative to the reference plane;

The measuring ruler is arranged on the rotating body and comprises a supporting rod, a guide rail and a ruler, wherein the guide rail is vertically arranged on one side of the supporting rod, and the ruler is vertically arranged on the other side of the supporting rod;

the first platform and the second platform are respectively arranged at the lower part and the upper part of the measuring ruler, wherein the first platform comprises a first sliding plate, a first base plate, a first pointer, a first lengthening screw rod, a push-pull rod and a fork opening support plate, wherein the first sliding plate is vertically matched and connected with the guide rail to realize up-and-down sliding on the guide rail, and can be locked through a first locking screw rod; the first base plate and the first pointer are both mounted on the first slide plate so as to slide together therewith; the first lengthening screw rod horizontally penetrates through the first limit nut and is connected with the pin shaft on the first substrate in a matched mode; one end of the push-pull rod passes through the pin shaft, and the other end of the push-pull rod can move along a slideway on the first substrate; the fork opening support plate is formed by hinging two arc-shaped elements with each other through a fork opening pin at the respective middle parts, and one end of the fork opening support plate is hinged with one end of the push-pull rod; in this way, the pin shaft and the push-pull rod are driven to move by rotating the first lengthened screw rod, so that the fork opening support plate is driven to perform opening and closing operations; the second platform comprises a second sliding plate, a second base plate and a second pointer, wherein the second sliding plate is vertically matched and connected with the guide rail to realize up-and-down sliding on the guide rail, and can be locked through a second locking screw rod; the second base plate and the second pointer are both mounted on the second slide plate so as to slide together therewith;

The first measuring meter group and the second measuring meter group are both arranged on the second platform, wherein the first measuring meter group comprises a first dial indicator arranged on the multi-link module through a first meter clamp and is continuously arranged on the lower part of the second platform through the multi-link module, so that the position and the posture of the first dial indicator can be freely adjusted; the second meter group comprises a second dial indicator which is arranged on the upper portion of the second platform through a second meter clamp, the second meter clamp is hinged with a sliding block through a third locking screw rod, the sliding block is connected with a third lengthening screw rod in a matched mode, and therefore the sliding block can execute front-back movement through rotating the third lengthening screw rod, and then the second dial indicator is driven to execute front-back movement.

Further preferably, the central axes of the first and second sets of cross shafts are set to be perpendicular to each other, and the axis of the rotating body is kept perpendicular to the plane in which the first and second sets of cross shafts are located.

As a further preferred feature, the first base plate preferably has an arcuate slot that mates with a pin at one end of the push-pull rod and a straight slot that mates with a lower end of the pin shaft.

As a further preferred aspect, the rotating body preferably includes a swivel, a gland, a rotating body compressing slider, a rotating body lengthening screw, and a hexagon socket screw, wherein the hexagon socket screw is installed on the second cross shaft through a round hole at the center of each of the gland and the swivel, the inner wall of the rotating body compressing slider is connected with the outer wall of the gland in a matching manner, and the rotating body lengthening screw is installed at the side surface of the swivel and presses against the rotating body compressing slider; in a sequential manner, when in use, the rotator lengthening screw rod can be rotated first, so that looseness occurs between the rotator pressing sliding block and the pressing cover, and then the swivel is rotated, so that all other components borne on the upper part of the rotator rotate along with the rotator.

As a further preference, for the first gauge set, its multi-link module preferably comprises a first bar, a second bar, a first bar clamp, a second bar clamp and a fourth locking screw, wherein the first gauge clamp is hinged to the head end of the first bar, and the tail end of the first bar continues to be hinged to the head end of the second bar; the middle part of the second rod is sleeved on the first rod clamp, and the first rod clamp is hinged with the second rod clamp continuously; the second rod clamp is hinged with the second sliding plate through the fourth locking screw rod; in this way, by rotating the second bar clamp, the entire first gauge set can be rotated relative to the central axis of the fourth locking screw.

According to another aspect of the present invention, there is also provided a corresponding measuring method, characterized in that it comprises the steps of performing the functions of measuring and adjusting the perpendicularity between the measuring instrument itself and said reference platform, and comprising the steps of:

when the measuring instrument is used, firstly, the magnetic base station enables the whole measuring instrument to be adsorbed on the reference platform, and the measuring head of the first dial indicator is contacted with the reference platform by adjusting the second platform and the first measuring instrument group;

then the rotating body is rotated and drives the first measuring meter group to rotate together, so that the first dial indicator makes circular motion on the reference platform by the central axis of the magnetic base station, meanwhile, the indication change of the first dial indicator is observed in the rotating process, and the first ejector rod or the second ejector rod is judged to be screwed or unscrewed according to the indication change trend;

the rotating body is continuously rotated, and the first ejector rod and/or the second ejector rod are/is adjusted for a plurality of times until the number of the first dial indicator is not changed or the change range meets the preset requirement in the rotating process of the rotating body, and at the moment, the measuring ruler is kept vertical to the reference platform, namely the whole measuring instrument meets the requirement of the perpendicularity between the measuring ruler and the reference platform.

As a further preferred aspect, after completing the process of measuring and adjusting the perpendicularity between the measuring instrument itself and the reference platform, it preferably further includes a process of performing the measurement and adjustment of the perpendicularity of the shaft to be measured, and includes the steps of:

moving the measuring instrument to the side of the shaft to be measured, and enabling the fork opening support plate to be in full contact with the shaft to be measured by adjusting the relative position between the measuring instrument and the shaft to be measured and adjusting the opening and closing of the fork opening support plate of the first platform;

then, the second platform and the second measuring meter group are adjusted, so that the second dial indicator is kept in contact with the shaft to be measured, at the moment, all movable joints are locked, the locking of the second platform is opened, the vertical relationship between the shaft to be measured and the reference platform can be measured by moving the second platform up and down, and meanwhile, the relative position of the shaft to be measured and the reference platform can be adjusted according to data;

when one measured line meets the perpendicularity requirement, the whole measuring instrument moves clockwise or anticlockwise by ninety degrees around the axis to be measured, then the next test is carried out, and the measuring instrument returns to the vicinity of the first measuring position for testing until the perpendicularity of the axis to be measured meets the requirement.

As a further preferred aspect, after completing the process of performing the perpendicularity measurement and adjustment of the axes to be measured, it is preferred to further include a process of performing the measurement of the parallelism between the two axes to be measured, and includes the steps of:

the first measuring group is adjusted to enable the first dial indicator to be in contact with the other shaft to be measured, then the second platform is moved up and down, and the relative position between the other shaft to be measured and the reference is adjusted according to the numerical value change of the first dial indicator;

after one measured line meets the requirement of verticality, the other line is detected and adjusted by adjusting the relative position between the first measuring group and the other shaft to be measured, and after the detection is finished, the first dial indicator is returned to the position near the first measuring line for detection until the parallelism between the two shafts to be measured meets the requirement.

According to a further aspect of the present invention there is also provided a corresponding measurement method, characterised in that the method comprises the steps of performing a measurement of the parallelism between a reference axis and an axis to be measured, and comprising the steps of:

moving the measuring instrument to the side of the reference shaft, and enabling the fork opening support plate to be in full contact with the reference shaft by adjusting the relative position between the measuring instrument and the reference shaft and adjusting the opening and closing of the fork opening support plate of the first platform;

Then sliding the first platform up and down, and simultaneously continuously adjusting the first cross shaft group and the second cross shaft group to ensure that the fork opening support plate is always in full contact with the reference shaft in the process of sliding the first platform up and down until the first cross shaft group and the second cross shaft group are fixed;

then adjusting the second platform and the second measuring table group to enable the second dial indicator to keep in contact with the reference shaft, at the moment, opening the locking of the second platform under the condition of locking each movable joint, and then measuring the parallelism relationship between the measuring instrument and the reference shaft by moving the second platform up and down; meanwhile, in the process of moving the second platform up and down, continuously adjusting the relative positions of the first cross shaft group and the second cross shaft group according to the data of a second dial gauge in the second measuring gauge group, namely adjusting the relative positions between the whole measuring instrument and a reference shaft, and enabling the first cross shaft group and the second cross shaft group to finally finish fixing, wherein the numerical value change range of the second dial gauge in the whole up and down moving process of the second platform meets the preset requirement, and at the moment, the first line between the measuring instrument and the reference shaft is determined to meet the parallelism requirement;

Then the rotating body rotates for a certain angle, and the second platform and the second measuring meter group are adjusted at the same time, so that the second dial indicator keeps contact with the reference shaft, at the moment, the locking of the second platform is opened under the condition of locking each movable joint, and then the parallelism relationship between the measuring instrument and the reference shaft can be measured by moving the second platform up and down; meanwhile, in the process of moving the second platform up and down, continuously adjusting the relative positions of the first cross shaft group and the second cross shaft group according to the data of a second dial gauge in the second measuring gauge group, namely adjusting the relative positions between the whole measuring instrument and the reference shaft, and enabling the numerical value change range of the second dial gauge in the whole process of moving the second platform up and down to meet the preset requirement when the first cross shaft group and the second cross shaft group are finally fixed, and determining that the second line between the measuring instrument and the reference shaft meets the parallelism requirement at the moment;

continuing to rotate the rotating body to the vicinity of the first line of the reference shaft, and repeating the steps so that the first line meets the parallelism requirement; then rotating the rotating body again to the vicinity of a second line of the reference axis and repeating such that the second line satisfies the parallelism requirement, thereby determining that the parallelism requirement is satisfied between the measuring instrument and the reference axis;

Then, the first measuring group is adjusted to enable the first dial indicator to be in contact with the shaft to be measured, at the moment, the second platform is opened under the condition of locking each movable joint, then the relative position between the shaft to be measured and the reference platform is adjusted through moving the second platform up and down and according to the numerical value change of the first dial indicator, so that the relative position between the shaft to be measured and the reference platform is finally fixed, the numerical value change range of the first dial indicator meets the preset requirement in the whole up and down moving process of the second platform, and at the moment, the first line between the measuring instrument and the shaft to be measured is determined to meet the parallelism requirement;

then rotating the rotating body to rotate by a certain angle, adjusting the first measuring group to enable the first dial indicator to be in contact with the shaft to be measured, opening the locking of the second platform under the condition of locking each movable joint at the moment, and adjusting the relative position between the shaft to be measured and the reference platform by moving the second platform up and down and according to the numerical value change of the first dial indicator, so that the numerical value change range of the first dial indicator meets the preset requirement in the whole up-down moving process of the second platform when the relative position between the shaft to be measured and the reference platform is fixed, and measuring that the second line between the measuring instrument and the shaft to be measured meets the parallelism requirement at the moment;

Finally, continuing to rotate the rotating body to the vicinity of a first line of the shaft to be tested, and repeating the process to enable the first line to meet the requirement of parallelism; then, the rotating body is rotated again to reach the vicinity of a second line of the shaft to be measured, and the second line is repeated to meet the parallelism requirement, so that the parallelism requirement between the measuring instrument and the shaft to be measured is determined;

through the whole process, the parallelism requirement between the reference shaft and the shaft to be measured can be met.

In general, compared with the prior art, the technical scheme according to the invention has the advantages that by researching and improving the whole structural layout of the measuring instrument and the specific structures and arrangement modes of key components such as a cross shaft group, a rotating body, a working platform and the like, the functions of form and position tolerance between parts or between parts can be realized when the equipment is assembled, the verticality and parallelism between the parts and the platform can be measured, and the functions of parallelism between two rotating shafts and the like can be measured; the measuring instrument has the characteristics of high precision, compact structure, convenient operation, low cost, wide applicability and the like, and is particularly suitable for multifunctional measuring application occasions of various industrial equipment, especially special equipment.

Drawings

FIG. 1 is a schematic overall construction of a shaft assembly form and position tolerance gauge constructed in accordance with a preferred embodiment of the present invention;

FIG. 2 is a schematic view showing the structure of the magnetic base and two sets of cross-shafts shown in FIG. 1 in more detail;

FIG. 3 is a schematic view showing the structure of the rotary body and the measuring scale shown in FIG. 1 in more detail;

FIG. 4 is a schematic view of the structure of a first platform according to a preferred embodiment of the present invention;

FIG. 5 is a schematic diagram showing in more detail the arrangement configuration of the first platform shown in FIG. 4;

FIG. 6 is a schematic diagram showing the construction of the second platform and the first gauge set shown in FIG. 1 in greater detail;

FIG. 7 is a schematic diagram of a second gauge set in accordance with another preferred embodiment of the present invention;

FIG. 8 is a schematic diagram for exemplary illustration of a measurement and adjustment process for maintaining a scale perpendicular to a reference platform in accordance with the present invention;

FIG. 9 is a schematic diagram for exemplarily explaining an initial state for performing a "contour measurement" procedure according to the present invention;

fig. 10 is a schematic diagram for exemplarily explaining another state for performing the "contour measurement" process according to the present invention.

Detailed Description

The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.

Fig. 1 is a schematic overall construction of a shaft assembly form and position tolerance gauge constructed in accordance with a preferred embodiment of the present invention. As shown in fig. 1, the measuring instrument mainly comprises a magnetic base 1, a first cross shaft group 2, a second cross shaft group 3, a rotating body 4, a measuring ruler 5, a first platform 6, a second platform 7, a first measuring meter group 8, a second measuring meter group 9 and other components, wherein the magnetic base 1 is used as a mounting base of all the other components, the first cross shaft group 2 is directly mounted on the magnetic base 1, the second cross shaft group 3 is mounted on the first cross shaft group 2, the rotating body 4 is mounted on the second cross shaft group 3, the measuring ruler 5 is fixed on the rotating body 4, the first platform 6 and the second platform 7 are mounted on the measuring ruler, the first measuring meter group 8 and the second measuring meter group 9 are mounted on the second platform, and specific structural compositions, arrangement modes and the like of the key components are specifically described one by one.

The magnetic base 1 comprises a first base 1-1, a magnetic seat 1-2 arranged in the first base, a support 1-3 fixed on the upper surface of the first base 1-1 and the like, and is used as a mounting and supporting foundation of other components of the whole measuring instrument and is adsorbed on a reference platform 10 on which a part to be measured is placed through magnetic force. In use, for example, the first base 1-1 can be attached to the reference platform 10 of the part to be tested by rotating the knob on the magnetic base 1-2 and by the magnetic force of the magnetic base 1-2.

For the first cross axle group 2, it is directly installed on the magnetic base 1, and mainly includes the first cross axle 2-1, the first ejector rod 2-2, the first compression spring 2-3, the first gasket 2-6, and so on. Wherein the first cross shaft 2-1 is horizontally hinged with the support 1-3 through one end thereof; the first ejector rod 2-2 vertically penetrates through the first cross shaft 2-1 and is then screwed into a threaded hole of the first base 1-1; the first compression spring 2-3 and the first gasket 2-6 are respectively sleeved on the first ejector rod, the head end and the tail end of the first compression spring 2-3 respectively press the lower surface of the first cross shaft 2-1 and the upper surface of the first base 1-1, and the first gasket 2-6 is arranged between the upper surface of the first cross shaft and the first ejector rod 2-2; in this way, by rotating the knob at the upper end of the first jack, the first cross 2-1 and other components provided thereon are adjusted to remain parallel in the X-axis direction with respect to the reference plane.

More specifically, one end of the first cross 2-1 may be hinged to the support 1-3, for example, through cylindrical sections on both sides, the first compression spring 2-3 and the first spacer 2-6 are both threaded on the first jack 2-2, the upper surface of the first spacer 2-6 is in contact with the first jack 2-2, the lower surface of the first spacer 2-6 is in contact with the upper surface of the first cross 2-1, the top end of the first compression spring 2-3 is in contact with the lower surface of the first cross 2-1, the bottom end of the first compression spring 2-3 is in contact with the upper surface of the first base 1-1, and the first jack 2-2 is screwed into a threaded hole of the first base 1-1. Furthermore, the first pressing slide 2-4 and the first pressing cover 2-5 are both mounted together with the support 1-3. When the X-direction parallel adjusting device is used, the X-direction between the first cross shaft 2-1 and the reference plane can be adjusted to be parallel by rotating the knob at the upper end of the first ejector rod 2-2.

For the second cross-shaft group 3, it is mounted on the first cross-shaft group 2, preferably, the axial surfaces thereof are perpendicular to the central axial surface of the first cross-shaft group, and the second cross-shaft group comprises a second base 3-1, a second cross-shaft 3-2, a second ejector rod 3-3, a second compression spring 3-4, a second gasket 3-7 and the like. Wherein the second base 3-1 is fixed on the upper surface of the first cross 2-1 and serves as a mounting base for other elements of the second cross group; the second cross shaft 3-2 is horizontally hinged with the second base 3-1 through one end thereof; the second ejector rod 3-3 is vertically screwed into a threaded hole of the second cross shaft 3-2, and the second compression spring 3-4 and the second gasket 3-7 are both sleeved on the second ejector rod; in addition, the head and tail ends of the second compression spring 3-4 respectively press the lower surface of the second cross shaft 3-2 and the upper surface of the second base 3-1, and the second gasket 3-7 is arranged between the upper surface of the second ejector rod 3-3 and the lower surface of the second base 3-1; in this way, by rotating the knob at the upper end of the second carrier rod, the second cross and other components disposed thereon are adjusted to remain parallel in the Y-axis direction relative to the reference plane.

More specifically, the second base 3-1 is fixed on the upper surface of the first cross 2-1, one end of the second cross 3-2 is hinged with a semicircular groove on the base 3-1, for example, through cylindrical sections on two sides, the second compression spring 3-4 and the second spacer 3-7 are both threaded on the second ejector rod 3-3, the lower surface of the second spacer 3-7 is in contact with the upper surface of the second ejector rod 3-3, the upper surface of the second spacer 3-7 is in contact with the lower surface of the base 3-1, the top end of the second compression spring 3-4 is in contact with the lower surface of the second cross 3-2, the bottom end of the second compression spring 3-4 is in contact with the upper surface of the second base 3-1, and the second ejector rod 3-3 is screwed into a threaded hole of the second cross 3-2. In addition, the second pressing slider 3-5 and the second pressing cover 3-6 are both mounted with the second base 3-1. When the universal joint measuring instrument is used, the knob at the upper end of the ejector rod 3-3 is rotated to adjust the second cross shaft 3-2 to be parallel to the reference plane in the Y direction, namely, the universal joint measuring instrument can be adjusted by the first cross shaft group 2 and the second cross shaft group 3 together, so that the universal joint measuring instrument, namely the shaft assembly form and position tolerance measuring instrument, is vertical to the reference plane.

The rotating body 4 is mounted on the second cross shaft group 3, and is used for driving other components arranged on the rotating body to rotate in the Z-axis direction together with executing the rotation of the rotating body in the Z-axis direction relative to the reference plane. According to a preferred embodiment of the invention, the axis of the rotator is kept perpendicular to the plane in which the second axis of the second set of second axes lies.

As shown in the figure, the rotary type rotary compressor can comprise a rotary ring 4-1, a gland 4-2, a rotary body compressing sliding block 4-3, a rotary body lengthening screw 4-4, an inner hexagon bolt 4-5 and the like. The inner hexagon bolts 4-5 penetrate through round holes in the centers of the gland 4-2 and the swivel 4-1 respectively and are arranged on the second cross shaft 3-2, the inner wall of the rotating body compressing sliding block 4-3 is connected with the outer wall of the gland 4-2 in a matched mode, the rotating body lengthening bolts 4-4 are arranged on the side face of the swivel 4-1, and the rotating body compressing sliding block 4-3 is propped against. When the rotary body pressing device is used, firstly, the rotary body lengthening screw 4-4 can be rotated, so that looseness occurs between the rotary body pressing sliding block 4-3 and the pressing cover, and at the moment, the rotary ring 4-1 can be rotated, so that all components arranged on the upper portion of the rotary body can rotate.

The measuring ruler 5 is arranged on the rotating body 4 and comprises a supporting rod 5-1, a guide rail 5-2, a scale 5-3 and the like, wherein the guide rail 5-2 is vertically arranged on one side of the supporting rod 5-1, and the scale 5-3 is vertically arranged on the other side of the supporting rod 5-1; more specifically, as shown in the drawings, the bottom end of the support bar 5-1 may be mounted on the upper surface of the swivel 4-1, the guide rail 5-2 may be mounted on the front surface of the support bar 5-1, and the scale 5-3 may be mounted on the right side of the support bar 5-1.

The first and

second platforms

6, 7 are mounted on the lower and upper parts of the measuring scale 5, respectively, as will be described in more detail below in connection with fig. 4 and 5.

Wherein, for the first platform, the first platform comprises a first sliding plate 6-1, a first base plate 6-2, a first pointer 6-4, a first lengthened screw rod 6-5, a push-pull rod 6-6, a fork supporting plate 6-7 and the like. Wherein, the first slide plate 6-1 is vertically matched and connected with the guide rail 5-2 to realize the up-and-down sliding on the guide rail, and can be locked by the first locking screw rod 6-3; the first base plate 6-2 and the first pointer 6-4 are both mounted on the first slide plate 6-1 so as to slide together therewith; the first lengthened screw rod 6-5 horizontally passes through the first limit nut 6-9 and is matched and connected with the pin shaft 6-8 positioned on the first base plate 6-2; one end of the push-pull rod 6-6 passes through the pin shaft 6-8, and the other end of the push-pull rod can move along a slideway on the first base plate 6-2; the fork opening support plate 6-7 is formed by hinging two arc-shaped elements with each other at the middle part of each arc-shaped element through a fork opening pin 6-11, and one end of the fork opening support plate is hinged with one end of the push-pull rod 6-6; in this way, the pin shaft 6-8 and the push-pull rod 6-6 are driven to move by rotating the first lengthened screw rod 6-5, so that the fork opening support plate 6-7 is driven to perform opening and closing operations. More specifically, the first slide plate 6-1 is cooperatively connected with the guide rail 5-2, that is, the first slide plate 6-1 can slide on the guide rail 5-2, the first base plate 6-2, the first locking screw 6-3 and the first pointer 6-4 are all mounted on the first slide plate 6-1, and the top end of the first locking screw 6-3 can be in contact with the side surface of the guide rail 5-2, that is, the first locking screw 6-3 can lock the first slide plate 6-1. In addition, for example, a limit nut bracket 6-10 can be adopted to be installed on the first base plate 6-2, a first limit nut 6-9 is adopted to be installed in the limit nut bracket 6-10 at the same time, a first lengthened screw rod 6-5 penetrates through the first limit nut 6-9 and is connected with a pin shaft 6-8 in a matched mode, one end of a push-pull rod 6-6 is penetrated by the pin shaft 6-8 to enable the push-pull rod to be hinged together, one end of a fork support plate 6-7 is hinged with one end of the push-pull rod 6-6, the middle parts of the two fork support plates 6-7 are hinged together through a fork pin 6-11, a pin at one end of the push-pull rod 6-6 is matched with a slideway on the first base plate 6-2, the pin shaft 6-8 is matched with the slideway on the first base plate 6-2, and the lower end of the fork pin 6-11 is fixed on the base plate 6-2.

The second stage mainly includes a second slide plate 7-1, a second substrate 7-2, a second pointer 7-4, and the like. Wherein the second sliding plate 7-1 is vertically matched and connected with the guide rail 5-2 to realize up-and-down sliding on the guide rail, and can be locked through the second locking screw rod 7-3; the second base plate 7-2 and the second pointer 7-4 are both mounted on the second slide plate 7-1 so as to slide together therewith.

The first meter set 8, the second meter set 9 will be explained in more detail below in connection with fig. 6 and 7. As shown, both sets of gauges are mounted on the second platform 7, wherein the first set of gauges mainly includes a first dial gauge 8-1 mounted on the multi-link module by a first gauge clamp 8-2 and continues to be mounted to the lower portion of the second platform by the multi-link module, thereby freely adjusting the position and posture of the first dial gauge. More specifically, the first gauge set may include, for example, a first dial gauge 8-1, a first gauge clamp 8-2, a first rod 8-3, a second rod 8-4, a first rod clamp 8-5, a second rod clamp 8-6, and a fourth locking screw 8-7. Wherein, first amesdial 8-1 is installed on first table clamp 8-2, and first table clamp 8-2 and first pole 8-3 are articulated, and first pole 8-3 and second pole 8-4 are articulated, and second pole 8-4 is installed on first pole clamp 8-5, and first pole clamp 8-5 and second pole clamp 8-6 are articulated, and second pole clamp 8-6 is articulated through fourth locking screw rod 8-7 and second slide 7-1. In use, the relative position of the first dial indicator 8-1 may be adjusted by rotating the second lever clamp 8-6 to rotate the entire first set of gauges 8, or by causing relative movement of the first set of gauges 8-2, the first lever 8-3, the second lever 8-4, the first lever clamp 8-5 and the second lever clamp 8-6.

For the second gauge set 9, it includes a second dial indicator 9-1 mounted on the upper portion of the second platform by a second gauge clamp 9-2, and the second gauge clamp 9-2 is hinged to a slider 9-6 by a third locking screw 9-7, and the slider 9-6 is cooperatively connected to a third extension screw 9-4, so that by rotating the fourth extension screw 9-4, the slider 9-6 performs a back-and-forth movement, thereby driving the second dial indicator 9-1 to perform a back-and-forth movement. More specifically, as shown, the second dial indicator 9-1 is mounted on the second gauge grip 9-2, the second gauge grip 9-2 and the slider 9-6 are hinged together, such as by a third locking screw 9-7, the gauge stand 9-3 is fixed on the second base plate 7-2, the second stop nut 9-5 is mounted in the gauge stand 9-3, the third extension screw 9-4 is connected with the slider 9-6 through the second stop nut 9-5 in a mating manner, and the slider 9-6 is mated with a chute on the gauge stand 9-3.

The implementation of the measuring device according to the invention in various exemplary applications will be explained in detail below with reference to fig. 1 and 8.

First, as shown in fig. 8, the implementation process of making itself perpendicular to the reference platform 10 is specifically as follows: first, the magnetic base 1 is attracted to a reference plane, and the axis of the rotating body 4 is perpendicular to the plane of the second cross 3-2 of the second cross group 3. By adjusting the first ejector rod 2-2, all parts on the first cross axle group 2 of the measuring instrument can be adjusted to rotate around the Y axis, by adjusting the second ejector rod 3-3, all parts on the second cross axle group 3 can be adjusted to rotate around the X axis, and by rotating the swivel 4-1 in the rotating body 4, all parts on the rotating body 4 can be rotated around the Z axis.

When the measuring instrument is specifically used, the whole measuring instrument is adsorbed on the reference platform 10 through the magnetic base platform 1, and the measuring head of the first dial indicator 8-1 is contacted with the reference platform 10 through adjusting the second platform 7 and the first measuring instrument group 8; then the rotating body 4 is rotated to drive the first measuring meter group 8 to rotate, so that the first dial indicator 8-1 performs circular motion on the reference platform 10 by the central axis of the magnetic base station 1, meanwhile, the indication change of the first dial indicator 8-1 is observed in the process of rotating the rotating body 4, and the first mandril 2-2 or the second mandril 3-3 is judged to be screwed or unscrewed according to the indication change trend of the first dial indicator 8-1; the rotary body 4 is continuously rotated, and the first ejector rod 2-2 and/or the second ejector rod 3-3 are/is adjusted for multiple times until the indication of the first dial indicator 8-1 is not changed (or the change range meets the requirement) in the process of rotating the rotary body 4, at the moment, the part above the rotary body 4, namely the measuring ruler 5, is vertical to the reference platform 10 (or meets the requirement of perpendicularity), namely the shaft assembly form and position tolerance tester can realize the function of being vertical to the reference platform 10 (or meeting the requirement of perpendicularity).

As shown in fig. 9 and 10, the implementation of the "contour measurement" according to the present invention will be explained in detail with reference to the drawings. At this time, the distance between the measuring head of the first dial indicator 8-1 and the reference platform 10 can be kept unchanged, i.e. the "equal height measurement" can be performed, and the specific implementation process is as follows:

Firstly, the measuring ruler 5 is vertical to the reference platform (or meets the requirement of verticality) by adjusting the first ejector rod 2-2 and the second ejector rod 3-3; then, the position of the second platform 7 and the first rod 8-3 and the second rod 8-4 in the first measuring meter group 8 are regulated, so that the measuring head of the first dial indicator 8-1 is contacted with the upper end surface of the first part to be measured 11, the first dial indicator 8-1 is zeroed, and then the second platform 7, the first rod 8-3 and the second rod 8-4 are fixed; then, the rotating body 4 rotates to drive the first measuring meter set 8 to rotate together, so that the first dial indicator 8-1 moves circumferentially on the reference platform 10 by the central axis of the magnetic base 1 until the measuring head of the first dial indicator 8-1 rotates to the upper end face of the second part to be measured 12, and at the moment, whether the upper end face of the first part to be measured 11 and the upper end face of the second part to be measured 12 are equal in height can be judged by looking at the indication number of the first dial indicator 8-1.

The implementation of the method for making the axis to be measured perpendicular to the reference according to the present invention will be explained in detail below.

After the process that the measuring ruler 5 is vertical to the reference platform 10 (or meets the requirement of verticality) is completed, the adjusted measuring instrument is moved to the side of the shaft to be measured, and the fork support plates 6-7 are kept in full contact with the shaft to be measured by adjusting the relative positions of the measuring instrument and the shaft to be measured and by adjusting the opening and closing of the fork support plates 6-7 on the first platform 6; then, the second dial indicator 9-1 is contacted with the shaft to be measured by adjusting the second platform 7 and the second measuring meter group 9, at the moment, all movable joints are locked, the locking of the second platform 7 is opened, the vertical relation between the shaft to be measured and the reference platform can be measured by moving the second platform 7 up and down, and meanwhile, the relative position of the shaft to be measured and the reference platform is adjusted according to data. When one measured line meets the requirement of verticality, the shaft assembly form and position tolerance tester moves around the shaft to be measured by ninety degrees clockwise or anticlockwise, then performs a test again, returns to the vicinity of the first measuring position to be detected after the test is finished, and adjusts according to the sequence after the test is not finished, so that the verticality of the shaft to be measured can meet the requirement after the adjustment is performed for many times.

Finally, the implementation process of measuring the parallelism between the reference axis and the axis to be measured is carried out.

Firstly, moving the measuring instrument to the side of the reference shaft, and enabling the fork support plate 6-7 to be kept in full contact with the reference shaft by adjusting the relative position between the measuring instrument and the reference shaft and adjusting the opening and closing of the fork support plate 6-7 of the first platform 6;

then sliding the first platform 6 up and down, and simultaneously continuously adjusting the first cross shaft group 2 and the second cross shaft group 3 to ensure that the fork support plates 6-7 are kept in full contact with the reference shaft all the time in the process of sliding the first platform 6 up and down until the first cross shaft group 2 and the second cross shaft group 3 are fixed;

then, the second platform 7 and the second measuring table group 9 are adjusted so that the second dial indicator 9-1 keeps contact with the reference shaft, at the moment, the locking of the second platform 7 is opened under the condition of locking each movable joint, and then the parallelism relationship between the measuring instrument and the reference shaft can be measured by moving the second platform 7 up and down; meanwhile, in the process of moving the second platform 7 up and down, continuously adjusting the relative positions of the first cross-shaft group 2 and the second cross-shaft group 3 according to the data of the second dial indicator 9-1 in the second measuring table group 9, namely adjusting the relative positions between the whole measuring instrument and the reference shaft, and enabling the first cross-shaft group 2 and the second cross-shaft group 3 to finally finish fixing, wherein the numerical variation range of the second dial indicator 9-1 in the whole up and down moving process of the second platform 7 meets the preset requirement, and at the moment, the measured first line between the measuring instrument and the reference shaft meets the parallelism requirement;

Then the rotator 4 is rotated for a certain angle, and the second platform 7 and the second measuring meter group 9 are adjusted at the same time, so that the second dial indicator 9-1 keeps contact with the reference shaft, at the moment, the second platform 7 is opened under the condition of locking each movable joint, and then the parallelism between the measuring meter and the reference shaft can be measured by moving the second platform 7 up and down; meanwhile, in the process of moving the second platform 7 up and down, continuously adjusting the relative positions of the first cross axle set 2 and the second cross axle set 3 according to the data of the second dial indicator 9-1 in the second measuring table set 9, namely, adjusting the relative positions between the whole measuring instrument and the reference axle, and enabling the first cross axle set 2 and the second cross axle set 3 to finally finish fixing, wherein the numerical value change range of the second dial indicator 9-1 in the whole up and down moving process of the second platform 7 meets the preset requirement, and at the moment, the parallelism requirement between the second lines between the measuring instrument and the reference axle is determined;

continuing to rotate the rotating body 4 to the vicinity of the first line of the reference axis, and repeating such that the first line satisfies the parallelism requirement; then the rotating body 4 is rotated again to the vicinity of the second line of the reference axis and repeated so that the second line satisfies the parallelism requirement, thereby determining that the parallelism requirement is satisfied between the measuring instrument and the reference axis;

Then, the first measuring set 8 is adjusted to enable the first dial indicator 8-1 to be in contact with the shaft to be measured, at the moment, the second platform 7 is opened under the condition of locking each movable joint, then the relative position between the shaft to be measured and the reference platform 10 is adjusted through moving the second platform 7 up and down and according to the numerical value change of the first dial indicator 8-1, so that the first line between the measuring instrument and the shaft to be measured is determined to meet the parallelism requirement when the relative position between the shaft to be measured and the reference platform 10 is fixed finally, and the numerical value change range of the first dial indicator 8-1 in the whole up and down movement process of the second platform 7 meets the preset requirement;

then rotating the rotating body 4 to rotate by a certain angle, and simultaneously adjusting the first measuring group 8 to enable the first dial indicator 8-1 to be in contact with the shaft to be measured, at the moment, opening the locking of the second platform 7 under the condition of locking each movable joint, and then adjusting the relative position between the shaft to be measured and the reference platform 10 by moving the second platform 7 up and down and according to the numerical value change of the first dial indicator 8-1, so that the relative position between the shaft to be measured and the reference platform 10 is finally achieved when the relative position between the shaft to be measured and the reference platform 10 is fixed, and the numerical value change range of the first dial indicator 8-1 in the whole up and down movement process of the second platform 7 meets the preset requirement, and at the moment, the second line between the measuring instrument and the shaft to be measured is measured to meet the parallelism requirement;

Finally, continuing to rotate the rotating body 4 to the vicinity of the first line of the shaft to be tested, and repeating the process to enable the first line to meet the requirement of parallelism; then, the rotating body 4 is rotated again to reach the vicinity of a second line of the shaft to be measured, and the second line is repeated to meet the parallelism requirement, so that the parallelism requirement between the measuring instrument and the shaft to be measured is determined;

In summary, the shaft assembly form and position tolerance measuring instrument can solve the specific requirements of various application scenes, can realize the function of form and position tolerance between parts or between parts when assembling equipment, can measure the perpendicularity and parallelism between the parts and the platform, and can also measure the parallelism between two rotating shafts and the like; the measuring instrument has the characteristics of high precision, compact structure, convenient operation, low cost, wide applicability and the like, and is particularly suitable for multifunctional measuring application occasions of various industrial equipment, especially special equipment.

It will be readily appreciated by those skilled in the art that the foregoing description is merely a preferred embodiment of the invention and is not intended to limit the invention, but any modifications, equivalents, improvements or alternatives falling within the spirit and principles of the invention are intended to be included within the scope of the invention.

Claims

1. The utility model provides a multi-functional axle equipment form and position tolerance measuring apparatu, this measuring apparatu includes magnetism base station (1), first cross axle group (2), second cross axle group (3), rotator (4), dipperstick (5), first platform (6), second platform (7), first meter group (8) and second meter group (9), its characterized in that:

the magnetic base station (1) comprises a first base (1-1), a magnetic seat (1-2) arranged in the first base, and a support (1-3) fixed on the upper surface of the first base (1-1), wherein the support is used as a mounting and supporting foundation of other components of the whole measuring instrument and is adsorbed on a reference platform (10) on which a part to be measured is placed through magnetic force;

the first cross shaft group (2) is directly arranged on the magnetic base (1) and comprises a first cross shaft (2-1), a first ejector rod (2-2), a first compression spring (2-3) and a first gasket (2-6), wherein the first cross shaft (2-1) is horizontally hinged with the support (1-3) through one end of the first cross shaft; the first ejector rod (2-2) vertically penetrates through the first cross shaft (2-1) and is then screwed into a threaded hole of the first base (1-1); the first compression spring (2-3) and the first gasket (2-6) are respectively sleeved on the first ejector rod (2-2), the head end and the tail end of the first compression spring (2-3) respectively press the lower surface of the first cross shaft (2-1) and the upper surface of the first base (1-1), and the first gasket (2-6) is arranged between the upper surface of the first cross shaft (2-1) and the first ejector rod (2-2); in this way, by rotating the knob at the upper end of the first jack (2-2), the first cross (2-1) is adjusted so as to remain parallel in the X-axis direction with respect to the reference plane;

The second cross shaft group (3) is mounted on the first cross shaft group (2) and comprises a second base (3-1), a second cross shaft (3-2), a second ejector rod (3-3), a second compression spring (3-4) and a second gasket (3-7), wherein the second base (3-1) is fixed on the upper surface of the first cross shaft (2-1) and is used as a mounting foundation of other elements of the second cross shaft group (3); the second cross shaft (3-2) is horizontally hinged with the second base (3-1) through one end of the second cross shaft; the second ejector rod (3-3) is vertically screwed into a threaded hole of the second cross shaft (3-2), and the second compression spring (3-4) and the second gasket (3-7) are both sleeved on the second ejector rod (3-3); in addition, the head end and the tail end of the second compression spring (3-4) respectively press against the lower surface of the second cross shaft (3-2) and the upper surface of the second base (3-1), and the second gasket (3-7) is arranged between the upper surface of the second ejector rod (3-3) and the lower surface of the second base (3-1); in this way, by rotating the knob at the upper end of the second jack (3-3), the second cross (3-2) is adjusted so as to remain parallel in the Y-axis direction with respect to the reference plane;

the rotating body (4) is arranged on the second cross shaft group (3) and is used for driving other components of the measuring instrument arranged on the rotating body to rotate in the Z-axis direction together while executing the rotation of the rotating body in the Z-axis direction relative to the reference plane;

The measuring ruler (5) is arranged on the rotating body (4) and comprises a supporting rod (5-1), a guide rail (5-2) and a scale (5-3), wherein the guide rail (5-2) is vertically arranged on one side of the supporting rod (5-1), and the scale (5-3) is vertically arranged on the other side of the supporting rod (5-1);

the first platform (6) and the second platform (7) are respectively arranged at the lower part and the upper part of the measuring ruler (5), wherein the first platform (6) comprises a first sliding plate (6-1), a first base plate (6-2), a first pointer (6-4), a first lengthening screw rod (6-5), a push-pull rod (6-6) and a fork supporting plate (6-7), and the first sliding plate (6-1) is vertically matched and connected with the guide rail (5-2) to realize up-and-down sliding on the guide rail and can be locked through a first locking screw rod (6-3); the first base plate (6-2) and the first pointer (6-4) are both mounted on the first slide plate (6-1) so as to slide together therewith; the first lengthening screw (6-5) horizontally penetrates through the first limit nut (6-9) and is matched and connected with a pin shaft (6-8) positioned on the first base plate (6-2); one end of the push-pull rod (6-6) passes through the pin shaft (6-8), and the other end of the push-pull rod can move along a slideway on the first base plate (6-2); the fork opening support plate (6-7) is formed by hinging two arc-shaped elements with each other at the middle part of each arc-shaped element through a fork opening pin (6-11), and one end of the fork opening support plate (6-7) is hinged with one end of the push-pull rod (6-6); in this way, the pin shaft (6-8) and the push-pull rod (6-6) are driven to move by rotating the first lengthened screw rod (6-5), so that the fork opening support plate (6-7) is driven to perform opening and closing operations; for the second platform (7), the second platform comprises a second sliding plate (7-1), a second base plate (7-2) and a second pointer (7-4), wherein the second sliding plate (7-1) is vertically matched and connected with the guide rail (5-2) to realize up-and-down sliding on the guide rail, and can be locked through a second locking screw (7-3); the second base plate (7-2) and the second pointer (7-4) are both mounted on the second slide plate (7-1) so as to slide together therewith;

The first measuring meter group (8) and the second measuring meter group (9) are arranged on the second platform (7), wherein the first measuring meter group (8) comprises a first dial indicator (8-1) arranged on the multi-link module through a first meter clamp (8-2), and the first dial indicator is continuously arranged on the lower part of the second platform (7) through the multi-link module, so that the position and the gesture of the first dial indicator (8-1) can be freely adjusted; the second meter group (9) comprises a second dial indicator (9-1) which is arranged at the upper part of the second platform (7) through a second meter clamp (9-2), the second meter clamp (9-2) is hinged with a sliding block (9-6) through a third locking screw (9-7), the sliding block (9-6) is in matched connection with a third lengthening screw (9-4), and therefore the sliding block (9-6) can execute front-back movement through rotating the third lengthening screw (9-4) so as to drive the second dial indicator (9-1) to execute front-back movement;

for the first meter group, the multi-link module comprises a first rod (8-3), a second rod (8-4), a first rod clamp (8-5), a second rod clamp (8-6) and a fourth locking screw (8-7), wherein the first meter clamp (8-2) is hinged with the head end of the first rod (8-3), and the tail end of the first rod (8-3) is continuously hinged with the head end of the second rod (8-4); the middle part of the second rod (8-4) is sleeved on the first rod clamp (8-5), and the first rod clamp is continuously hinged with the second rod clamp (8-6); the second rod clamp (8-6) is hinged with the second sliding plate (7-1) through the fourth locking screw rod (8-7).

2. Axle assembly form and position tolerance measuring instrument according to claim 1, characterized in that the central axes of the first and second sets of cross axles (2, 3) are set to be perpendicular to each other and the axis of the rotating body (4) is kept perpendicular to the plane of the second cross axle (3-2).

3. The axle assembly form and position tolerance measuring instrument according to claim 1, characterized in that the first base plate (6-2) has an arc-shaped groove and a straight slide groove, wherein the arc-shaped groove cooperates with a pin at one end of the push-pull rod (6-6), and the straight slide groove cooperates with a lower end of the pin axle (6-8).

4. The shaft assembly form and position tolerance measuring instrument according to claim 1, characterized in that for the rotating body (4), the rotating body comprises a rotating ring (4-1), a gland (4-2), a rotating body compressing sliding block (4-3), a rotating body lengthening screw (4-4) and an inner hexagon bolt (4-5), wherein the inner hexagon bolt (4-5) is installed on the second cross shaft (3-2) through a round hole at the center of each of the gland and the rotating ring, the inner wall of the rotating body compressing sliding block (4-3) is connected with the outer wall of the gland (4-2) in a matching way, and the rotating body lengthening screw (4-4) is installed on the side face of the rotating ring (4-1) and abuts against the rotating body compressing sliding block (4-3); in a sequential manner, when in use, the rotator lengthening screw (4-4) can be rotated firstly, so that looseness occurs between the rotator pressing sliding block (4-3) and the pressing cover (4-2), and then the swivel (4-1) is rotated, so that all other components borne on the upper part of the rotator rotate along with the rotator.

5. A method of measuring with a shaft assembly form and position tolerance gauge according to any one of claims 1-4, characterized in that it comprises the steps of performing the function of measuring and adjusting the perpendicularity between the gauge itself and the reference platform (10), and comprising the following steps:

when the measuring instrument is used, firstly, the magnetic base station (1) enables the whole measuring instrument to be adsorbed on the reference platform (10), and the measuring head of the first dial indicator (8-1) is contacted with the reference platform (10) by adjusting the second platform (7) and the first dial indicator group (8);

then the rotating body (4) is rotated and drives the first measuring meter group (8) to rotate together, so that the first measuring meter (8-1) moves circumferentially on the reference platform (10) by the central axis of the magnetic base table (1), meanwhile, the indication change of the first measuring meter (8-1) is observed in the rotating process, and the first ejector rod (2-2) or the second ejector rod (3-3) is judged to be screwed or unscrewed according to the indication change trend;

the rotating body (4) is continuously rotated, and the first ejector rod (2-2) and/or the second ejector rod (3-3) are/is adjusted for a plurality of times until the indication number of the first dial indicator (8-1) is not changed or the change range meets the preset requirement in the rotating process of the rotating body (4), and at the moment, the measuring ruler (5) is kept vertical to the reference platform (10), namely the whole measuring instrument meets the requirement of the perpendicularity between the measuring ruler and the reference platform (10).

6. Method according to claim 5, characterized in that it comprises, after the completion of the process of measuring and adjusting the perpendicularity between the measuring instrument itself and the reference platform (10), a process of measuring and adjusting the perpendicularity of the shaft to be measured, and comprises the following steps:

moving the measuring instrument to the side of the shaft to be measured, and enabling the fork opening support plate (6-7) to be in full contact with the shaft to be measured by adjusting the relative position between the measuring instrument and the shaft to be measured and adjusting the opening and closing of the fork opening support plate (6-7) of the first platform (6);

then, the second platform (7) and the second measuring table group (9) are regulated, so that the second dial indicator (9-1) is kept in contact with the shaft to be measured, at the moment, all movable joints are locked, then the second platform (7) is opened for locking, the vertical relation between the shaft to be measured and the reference platform can be measured by moving the second platform (7) up and down, and meanwhile, the relative position of the shaft to be measured and the reference platform can be regulated according to data;

7. A method of measuring using a shaft assembly form and position tolerance gauge according to any one of claims 1-4, characterized in that the method comprises the steps of performing a measurement of the parallelism between a reference shaft and a shaft to be measured, and comprising the steps of:

moving the measuring instrument beside the reference shaft, and enabling the fork support plate (6-7) to be in full contact with the reference shaft by adjusting the relative position between the measuring instrument and the reference shaft and adjusting the opening and closing of the fork support plate (6-7) of the first platform (6);

then sliding the first platform (6) up and down, and simultaneously continuously adjusting the first cross shaft group (2) and the second cross shaft group (3) to ensure that the fork opening support plates (6-7) are always in full contact with the reference shaft in the process of sliding the first platform (6) up and down until the first cross shaft group (2) and the second cross shaft group (3) are fixed;

then, the second platform (7) and the second measuring table group (9) are adjusted, so that the second dial indicator (9-1) is kept in contact with the reference shaft, at the moment, the locking of the second platform (7) is opened under the condition of locking each movable joint, and then the parallelism relationship between the measuring instrument and the reference shaft can be measured by moving the second platform (7) up and down; meanwhile, in the process of moving the second platform (7) up and down, continuously adjusting the relative positions of the first cross shaft group (2) and the second cross shaft group (3) according to the data of a second dial gauge (9-1) in the second dial gauge group (9), namely adjusting the relative positions of the whole measuring instrument and a reference shaft, and enabling the first cross shaft group (2) and the second cross shaft group (3) to finally finish fixing, wherein the numerical value change range of the second dial gauge (9-1) in the whole up and down movement process of the second platform (7) meets preset requirements, and at the moment, the measured first line between the measuring instrument and the reference shaft meets the parallelism requirement;

Then the rotating body (4) rotates for a certain angle, and the second platform (7) and the second measuring meter group (9) are adjusted at the same time, so that the second dial indicator (9-1) keeps contact with the reference shaft, at the moment, the locking of the second platform (7) is opened under the condition of locking each movable joint, and then the parallelism relationship between the measuring meter and the reference shaft can be measured by moving the second platform (7) up and down; meanwhile, in the process of moving the second platform (7) up and down, continuously adjusting the relative positions of the first cross-shaft group (2) and the second cross-shaft group (3) according to the data of a second dial indicator (9-1) in a second measuring table group (9), namely adjusting the relative positions of the whole measuring instrument and a reference shaft, and enabling the first cross-shaft group (2) and the second cross-shaft group (3) to finally finish fixing, wherein the numerical variation range of the second dial indicator (9-1) in the whole up and down moving process of the second platform (7) meets preset requirements, and at the moment, the measured second line between the measuring instrument and the reference shaft meets the parallelism requirement;

continuing to rotate the rotating body (4) to the vicinity of the first line of the reference axis, and repeating such that the first line satisfies the parallelism requirement; then rotating the rotating body (4) again to the vicinity of a second line of the reference axis and repeating such that the second line satisfies the parallelism requirement, thereby determining that the parallelism requirement is satisfied between the measuring instrument and the reference axis;

Then, the first dial indicator group (8) is adjusted to enable the first dial indicator (8-1) to be in contact with the shaft to be measured, at the moment, the second platform (7) is opened under the condition of locking each movable joint, then the relative position between the shaft to be measured and the reference platform (10) is adjusted through moving the second platform (7) up and down and according to the numerical value change of the first dial indicator (8-1), so that the first line between the measuring instrument and the shaft to be measured is determined to meet the parallelism requirement in the moment when the relative position between the shaft to be measured and the reference platform (10) is fixed finally, and the numerical value change range of the first dial indicator (8-1) meets the preset requirement in the whole up and down movement process of the second platform (7);

then rotating the rotating body (4) to rotate by a certain angle, adjusting the first dial indicator group (8) to enable the first dial indicator (8-1) to be in contact with the shaft to be measured, opening the locking of the second platform (7) under the condition of locking each movable joint, and then adjusting the relative position between the shaft to be measured and the reference platform (10) by moving the second platform (7) up and down and according to the numerical value change of the first dial indicator (8-1), so that the numerical value change range of the first dial indicator (8-1) meets the preset requirement in the whole up and down moving process of the second platform (7) when the relative position between the shaft to be measured and the reference platform (10) is fixed, and measuring the second line between the measuring instrument and the shaft to be measured meets the parallelism requirement;

Finally, continuing to rotate the rotating body (4) to the vicinity of a first line of the shaft to be tested, and repeating the process to enable the first line to meet the requirement of parallelism; then, the rotating body (4) is rotated again to reach the vicinity of a second line of the shaft to be measured, and the second line is repeated to meet the parallelism requirement, so that the parallelism requirement between the measuring instrument and the shaft to be measured is determined;