Test frame for detecting coaxiality of shaft

Abstract

The utility model discloses a testing frame used for shaft coaxiality detection, which comprises a clamping mechanism, a coaxiality measuring mechanism and an adjusting mechanism, and is characterized in that the clamping mechanism comprises at least two clamping ends, and the at least two clamping ends form a size-adjustable clamping area; the coaxiality measuring mechanism is provided with a measuring head used for measuring the coaxiality of the to-be-measured shaft in the clamping area. The adjusting mechanism is connected with the clamping mechanism and the coaxiality measuring mechanism and is used for adjusting the shaft piece to be measured and the measuring head to be perpendicular to each other; the device has the advantages of being simple in structure, convenient to operate, high in measurement precision and the like, solves the problem that the shaft position cannot be adjusted when a traditional detection tool fixes a motor, ensures that the position of a detected shaft is consistent with a detected reference axis, and improves the accuracy of a detection result.

Description

TECHNICAL FIELD

[0001] The utility model relates to coaxial degree testing fixture technical field, concretely relates to a kind of for shaft coaxial degree detection test rack. BACKGROUND

[0002] In the motor production and assembly process, the coaxiality of motor shaft is the key index that influences equipment running stability, vibration noise and life. Coaxiality detection method usually adopts dial gauge or laser alignment instrument measurement.

[0003] For example, the publication number CN108195273B provides a kind of coaxiality testing fixture, and the coaxiality testing fixture includes support body, base and dial gauge, support body includes support block and multiple cooperation parts, multiple cooperation parts are set to the outer circumferential surface of support block, multiple cooperation parts are matched with the inner surface of the inner cavity of workpiece body, and multiple cooperation parts are with the center axis of support block as the center of rotation symmetry;Support body is installed on base, and support body is rotated on base with the center axis of support block as the rotation axis;The axis of the measuring rod of dial gauge is perpendicular to the center axis of support block, when the inner cavity of workpiece is sleeved on support block, the head of the measuring rod of dial gauge is in contact with the outer circumferential surface of rod part. The coaxiality testing fixture, workpiece is installed on support body, and the coaxiality between the center axis of inner cavity and the center axis of rod part can be known by rotating support body through the digital change on dial gauge.

[0004] When motor coaxiality is detected, motor must be fixed on support block. The traditional detection tool adopts fixed V-block or flange positioning structure to fix motor, however, this fixed structure cannot adjust the position of shaft, when shell reference is used to clamp motor, the actual axis of motor shaft usually deviates from the reference axis of detection system, so that the initial position of the measured shaft exists significant deviation or inclination, direct measurement will lead to data distortion, thereby affecting the accuracy of detection result. UTILITY MODEL CONTENTS

[0005] The utility model aims at overcoming the above technical deficiencies, and proposes a kind of test rack for shaft coaxiality detection, to solve the technical problems that fixed structure cannot adjust the position of shaft in prior art, the actual axis of motor shaft usually deviates from the reference axis of detection system, and affects the accuracy of detection result.

[0006] To achieve the above technical purpose, the utility model adopts the following technical scheme:

[0007] The utility model provides a kind of test frame for shaft coaxiality detection, comprising: clamping mechanism, coaxiality measuring mechanism and adjusting mechanism, clamping mechanism includes at least two clamping ends, at least two the clamping end forms the clamping area of adjustable size;Coaxiality measuring mechanism has for measuring the probe of the clamping area of the shaft piece to be measured coaxiality;Adjusting mechanism connects the clamping mechanism and the coaxiality measuring mechanism, for adjusting the probe with the shaft piece to be measured is vertically arranged.

[0008] In some embodiments, the at least two clamping ends are horizontally installed, and the at least two clamping ends are oppositely arranged.

[0009] In some embodiments, the adjusting mechanism includes a first adjusting member and a second adjusting member, the first adjusting member is connected to the clamping mechanism through the second adjusting member, the first adjusting member and the second adjusting member are both used to adjust the installation angle of the clamping mechanism, and the adjustment axis of the first adjusting member is perpendicular to the adjustment axis of the second adjusting member.

[0010] In some embodiments, the first adjusting member includes a base, a bottom plate, a top plate, an inclined plate, and an adjusting bolt, the bottom plate, the top plate, and the inclined plate are sequentially arranged, and the contact surfaces of the inclined plate and the top plate and the bottom plate are both inclined surfaces; the base is arranged between the bottom plate and the top plate and is rotationally connected to the bottom plate and the top plate; the adjusting bolt is rotationally installed on the base and is threadedly connected to the inclined plate through the base to drive the inclined plate to move relative to the base, thereby driving the top plate to rotate relative to the bottom plate.

[0011] In some embodiments, the first adjusting member further includes a first stabilizing structure, the first stabilizing structure is connected to the bottom plate and the top plate to fix the bottom plate and the top plate.

[0012] In some embodiments, the side portions of the bottom plate and the top plate are respectively provided with a first sliding groove and a second sliding groove, the axis directions of the first sliding groove and the second sliding groove are respectively parallel to the bottom surface and the top surface of the inclined plate; the first stabilizing structure includes a first support block and a first fixing bolt, the two ends of the first support block are respectively slidably connected to the first sliding groove and the second sliding groove, and the first fixing bolt penetrates and is threadedly connected to the first support block to be abutably matched with the inclined plate by rotating relative to the first support block.

[0013] In some embodiments, the second adjusting member includes an adjusting plate and a screw adjuster, the adjusting plate is connected to the clamping mechanism, one end of the adjusting plate is rotationally connected to the first adjusting member, and the other end of the adjusting plate is connected to the first adjusting member through the screw adjuster, and the screw adjuster is used to drive the adjusting plate to rotate relative to the first adjusting member.

[0014] In some embodiments, the coaxiality measuring mechanism comprises a position adjusting member and a dial gauge, the dial gauge is mounted on the position adjusting member, and the position adjusting member is connected to the coaxiality measuring mechanism and used to drive the dial gauge to move along the clamping axis of the clamping mechanism and keep fixed.

[0015] In some embodiments, the position adjusting member comprises a support rod, a sliding sleeve and a locking bolt, one end of the support rod is connected to the coaxiality measuring mechanism, the sliding sleeve is slidably sleeved on the support rod, and the dial gauge is mounted on the sliding sleeve; the locking bolt penetrates through and is threadedly connected to the sliding sleeve to abut against the support rod by rotating relative to the sliding sleeve.

[0016] In some embodiments, the clamping mechanism comprises a plurality of clamping jaws arranged in an annular array and a plurality of clamping driving members, each of the clamping driving members is mounted on the adjusting mechanism, and the driving end of each of the clamping driving members is connected to one of the clamping jaws to drive the clamping jaws to move relative to the clamping area.

[0017] Compared with the prior art, the test frame for shaft coaxiality detection provided by the utility model has the advantages of simple structure, convenient operation, high measurement precision and the like, solves the problem that the traditional detection tool cannot adjust the shaft position when fixing the motor, ensures that the position of the measured shaft is consistent with the reference axis of detection, and improves the accuracy of the detection result. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is the overall structure schematic view of the test frame for shaft coaxiality detection provided by the utility model embodiment;

[0019] Figure 2 is the structure schematic view of the adjusting mechanism of the test frame for shaft coaxiality detection provided by the utility model embodiment;

[0020] Figure 3 is the front view sectional structure schematic view of the first adjusting member of the test frame for shaft coaxiality detection provided by the utility model embodiment;

[0021] Figure 4 is the top view sectional structure schematic view of the first adjusting member of the test frame for shaft coaxiality detection provided by the utility model embodiment;

[0022] Figure 5It is the side view structure schematic diagram of the second adjusting piece of the test frame for shaft coaxiality detection provided by the embodiment of the utility model.

[0023] Mark explanation:

[0024] 1, clamping mechanism; 11, clamping jaw; 12, clamping drive; 13, fixed base;

[0025] 2, coaxiality measuring mechanism; 21, position adjusting piece; 211, support rod; 212, sliding sleeve; 213, locking bolt; 214, first mounting seat; 215, second mounting seat; 22, dial gauge;

[0026] 3, adjusting mechanism; 31, first adjusting piece; 311, base; 312, bottom plate; 3121, first sliding slot; 313, top plate; 3131, second sliding slot; 3132, third sliding slot; 314, inclined plate; 315, adjusting bolt; 316, limit block; 317, first stabilizing structure; 3171, first support block; 3172, first fixing bolt; 32, second adjusting piece; 321, adjusting plate; 3211, fourth sliding slot; 322, screw adjuster; 323, second stabilizing structure; 3231, second support block; 3232, second fixing bolt;

[0027] 4, mounting base. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical scheme and advantages of the utility model more clearly, the following will be further described in detail by combining with the drawings and examples. It should be understood that the specific examples described here are only used to explain the utility model, and are not used to limit the utility model.

[0029] In order to solve the technical problem that the fixed structure cannot adjust the position of the shaft, the actual axis of the motor shaft usually deviates from the reference axis of the detection system, which affects the accuracy of the detection result, the utility model provides a test frame for shaft coaxiality detection, which has the advantages of simple structure, convenient operation, high measurement precision and the like, solves the problem that the traditional detection tool cannot adjust the position of the shaft when fixing the motor, ensures that the position of the measured shaft is consistent with the reference axis of detection, and improves the accuracy of the detection result.

[0030] It should be noted that the test frame for shaft coaxiality detection is used for but not limited to motor shaft detection, in order to facilitate the description, in the utility model, only the test frame for shaft coaxiality detection is applied to motor shaft detection as an example for description, and the principle of the test frame for shaft coaxiality detection applied to other types of shaft detection is substantially the same as that applied to motor shaft detection, which is not described here.

[0031] Please refer toFigure 1 A test fixture for shaft coaxiality detection comprises a clamping mechanism 1, a coaxiality measuring mechanism 2 and an adjusting mechanism 3. The clamping mechanism 1 comprises at least two clamping ends forming a clamping area with adjustable size. The coaxiality measuring mechanism 2 has a probe for measuring the coaxiality of a shaft to be measured in the clamping area. The adjusting mechanism 3 connects the clamping mechanism 1 and the coaxiality measuring mechanism 2 for adjusting the shaft to be measured and the probe to be perpendicular.

[0032] In the device, the clamping ends of the clamping mechanism 1 form a clamping area with adjustable size. The shaft to be measured can be fixed in the clamping area by the movement and retention of the clamping ends relative to the clamping area. The probe of the coaxiality measuring mechanism 2 can move to the vicinity of the motor shaft in the clamping area, and measure the coaxiality of the motor shaft by contact or non-contact method to ensure the accuracy of the measurement result. The adjusting mechanism 3 can adjust the shaft to be measured and the probe to be perpendicular, so that the shaft position is closer to the reference axis, thereby avoiding the amplification of errors caused by initial deviation, and improving the measurement efficiency and accuracy.

[0033] Preferably, in the embodiment, the measurement of the motor adopts a vertical installation mode, in which the at least two clamping ends are installed horizontally and oppositely. When the motor is fixed by the clamping ends in the clamping area, the motor shaft is in a vertical state. Therefore, in the embodiment, the adjusting mechanism 3 can adopt a leveling structure to realize the adjustment of the angular position of the motor shaft. Of course, in other embodiments, the measurement of the motor can also adopt a horizontal installation mode, in which the clamping ends can be installed vertically, and the position adjustment of the motor shaft in the horizontal plane can be realized by the adjusting mechanism.

[0034] Please refer to Figure 1 In some possible embodiments, the clamping mechanism 1 is composed of two clamping jaws 11, two clamping driving members 12 and a fixed seat 13. The clamping jaws form the clamping ends. The fixed seat 13 is installed on the adjusting end of the adjusting mechanism 3. The two clamping driving members 12 are symmetrically installed on the top end of the fixed seat 13. The two clamping jaws 11 are respectively installed on the output ends of the two clamping driving members 12. The clamping driving members 12 can adopt driving elements such as air cylinders and electric push rods. By controlling the extension and retraction of the clamping driving members 12, the clamping jaws 11 can clamp or release the motor.

[0035] Please refer to Figure 1In some possible embodiments, the coaxiality measuring mechanism 2 comprises a position adjusting member 21 and a dial gauge 22, the bottom of the adjusting mechanism 3 is provided with a mounting base 4, the position adjusting member 21 is mounted on the mounting base 4, and the dial gauge 22 is mounted on the position adjusting member 21. The position adjusting member 21 can drive the dial gauge 22 to move along the clamping axis of the clamping mechanism 1 and keep fixed, so as to facilitate the dial gauge 22 to detect the coaxiality deviation of the motor shaft at different positions. In use, the measuring head of the dial gauge 22 contacts the motor shaft to be detected, and based on the radial run-out measurement method, the coaxiality deviation of the motor shaft at different positions can be accurately read through the movement and contact of the measuring head.

[0036] In order to adjust the position of the dial gauge 22, in one of the embodiments, the position adjusting member 21 comprises a support rod 211, a sliding sleeve 212 and a locking bolt 213. The bottom end of the support rod 211 is vertically mounted on the mounting base 4 and located at one side of the clamping mechanism 1. The sliding sleeve 212 is sleeved on the support rod 211, and the dial gauge 22 is mounted on the sliding sleeve 212 through a first mounting seat 214 and a second mounting seat 215. Specifically, the first mounting seat 214 is fixed on one side of the sliding sleeve, and the second mounting seat 215 is mounted on the first mounting seat 214. The mounting position of the second mounting seat 215 can be adjusted by sliding relative to the first mounting seat 214, and then fixed by the bolt after adjustment. The locking bolt 213 penetrates and is threadedly connected to the sliding sleeve 212, so as to be in abutting engagement with the support rod 211 by rotating relative to the sliding sleeve 212. When the sliding sleeve 212 slides up and down along the support rod 211, the dial gauge 22 can be driven to move synchronously, so as to adjust the position of the dial gauge 22. After the dial gauge 22 is moved to the required position, the locking bolt 213 is tightened to abut against the support rod 211, so that the sliding sleeve 212 and the dial gauge 22 are fixed at the current position.

[0037] In order to further improve the stability and accuracy of measurement, in some possible embodiments, a scale line or a scale can be arranged on the support rod 211, so as to facilitate observation of the moving distance and position of the sliding sleeve 212 and the dial gauge 22.

[0038] Please refer to Figure 1 and Figure 2 In the embodiment, the adjusting mechanism 3 comprises a first adjusting member 31 and a second adjusting member 32. The first adjusting member 31 is connected to the clamping mechanism 1 through the second adjusting member 32. The first adjusting member 31 and the second adjusting member 32 are both used for adjusting the mounting angle of the clamping mechanism 1, and the adjusting axis of the first adjusting member 31 is perpendicular to the adjusting axis of the second adjusting member 32. Through cooperation of the first adjusting member 31 and the second adjusting member 32, the horizontal adjustment of the clamping mechanism 1 can be realized, so as to flexibly adjust the position of the motor shaft.

[0039] In other possible embodiments, the adjusting mechanism 3 is connected with the coaxiality measuring mechanism 2, for adjusting the angle of the coaxiality measuring mechanism 2, and by adjusting the angle position of the coaxiality measuring mechanism 2, the perpendicularity between the measuring head and the shaft to be measured is ensured.

[0040] Please refer to Figures 1 to 4 In one of the embodiments, the first adjusting member 31 is used for adjusting the lateral angle of the shaft, which comprises a base 311, a bottom plate 312, a top plate 313, an inclined plate 314 and an adjusting bolt 315. The bottom plate 312, the top plate 313 and the inclined plate 314 are sequentially arranged, and the contact surfaces of the inclined plate 314 with the top plate 313 and the bottom plate 312 are all inclined surfaces. The bottom surface of the bottom plate 312 and the bottom surface of the top plate 313 are also arranged as inclined surfaces. The bottom surface of the bottom plate 312 is attached to the inclined surface of the top surface of the bottom plate 312, and the bottom surface of the top plate 313 is attached to the inclined surface of the top plate 313. The base 311 is arranged between the bottom plate 312 and the top plate 313 and is rotationally connected with the bottom plate 312 and the top plate 313, so that the bottom plate 312 and the top plate 313 can relatively rotate, in order to adjust the lateral angle of the shaft. The adjusting bolt 315 is rotationally installed on the base 311 and is threadedly connected with the inclined plate 314 through the base 311. When the adjusting bolt 315 is rotated, the inclined plate 314 is driven to move relative to the base 311. Due to the effect of the inclined surface, the inclined plate 314 will drive the top plate 313 to rotate relative to the bottom plate 312, so as to realize the adjustment of the clamping mechanism 1 in the lateral angle.

[0041] Further, in some possible embodiments, a limiting block 316 is further arranged on the bottom plate 312, and the inner side of the inclined plate 314 is in sliding connection with the limiting block 316. The limiting block 316 can guide and limit the movement of the inclined plate 314, so as to ensure that the inclined plate 314 can be smoothly and accurately moved during the adjustment.

[0042] Further, in order to improve the stability after the adjustment of the first adjusting member 31, in some possible embodiments, the first adjusting member 31 further comprises a first stabilizing structure 317 connected with the bottom plate 312 and the top plate 313, for fixing the bottom plate 312 and the top plate 313 after the angle adjustment, so as to prevent the relative rotation of the bottom plate 312 and the top plate 313. Specifically, the side portions of the bottom plate 312 and the top plate 313 are respectively provided with a first sliding groove 3121 and a second sliding groove 3131, and the axis directions of the first sliding groove 3121 and the second sliding groove 3131 are respectively parallel to the bottom surface and the top surface of the inclined plate 314, as shown in Figure 2As shown, the distance between the two sliding grooves gradually increases from left to right; the first stabilizing structure 317 includes a first support block 3171 and a first fixing bolt 3172, the two ends of the first support block 3171 are respectively connected to the first sliding groove 3121 and the second sliding groove 3131 in a sliding manner, and the first fixing bolt 3172 penetrates and is threadedly connected to the first support block 3171 to abut against the inclined plate 314 by rotating relative to the first support block 3171. The two ends of the first support block 3171 are abutted on the first sliding groove 3121 and the second sliding groove 3131, thereby realizing the fixation of the bottom plate 312 and the top plate 313 after adjustment and preventing relative rotation, thereby improving the stability of the first adjusting member 31 after adjustment. When it is necessary to adjust the angle of the top plate 313, the first fixing bolt 3172 can be loosened, and the first support block 3171 can be slid to the left, thereby releasing the fixation of the bottom plate 312 and the top plate 313, and at this time, the angle of the top plate 313 can be adjusted by rotating the adjusting bolt 315. After adjustment is completed, the first support block 3171 is slid to the left until the two ends thereof are abutted on the first sliding groove 3121 and the second sliding groove 3131, respectively, and then the first fixing bolt 3172 is tightened again to fix the first support block 3171 on one side of the inclined plate 314, thereby fixing the bottom plate 312 and the top plate 313 at the current angle and realizing stable adjustment of the clamping mechanism 1 in the transverse angle.

[0043] Please refer to Figure 1 , Figure 2 and Figure 5 In one embodiment, the second adjusting member 32 is used to adjust the longitudinal angle of the shaft, which includes an adjusting plate 321 and a screw adjuster 322, the adjusting plate 321 is connected to the clamping mechanism 1, one end thereof is rotationally connected to the first adjusting member 31, and the other end thereof is connected to the first adjusting member 31 through the screw adjuster 322, and the screw adjuster 322 is used to drive the adjusting plate 321 to rotate relative to the first adjusting member 31. Among them, the screw adjuster 322 adopts a manual screw adjuster, by rotating the knob of the screw adjuster 322, the rotation of the adjusting plate 321 relative to the first adjusting member 31 can be realized, thereby adjusting the inclination of the clamping mechanism 1 in the longitudinal angle.

[0044] Further, in order to improve the stability of the second adjusting part 32 after adjustment, in some possible embodiments, the second adjusting part 32 further comprises a second stabilizing structure 323 for further improving the stability of the adjusting plate 321. The second stabilizing structure 323 has the same principle as the first stabilizing structure 317, which comprises a second supporting block 3231 and a second fixing bolt 3232, the side of the top plate 313 is provided with a third sliding groove 3132, the side of the adjusting plate 321 is provided with an inclined fourth sliding groove 3211, the two ends of the second supporting block 3231 are respectively connected with the third sliding groove 3132 and the fourth sliding groove 3211 in sliding mode, and the second fixing bolt 3232 penetrates and is threadedly connected to the second supporting block 3231, so as to be in abutting cooperation with the adjusting plate 321 by rotating relative to the second supporting block 3231, which has the same fixing principle as the first stabilizing structure 317, and will not be described here.

[0045] In order to ensure the stability of the adjusting mechanism 3, the number of the screw adjusters 322 is set to at least two, and the first stabilizing structure 317 and the second stabilizing structure 323 are also provided with two, two first stabilizing structures 317 are respectively arranged on the front and rear sides of the first adjusting part 31, and two second stabilizing structures 323 are respectively arranged on the left and right sides of the second adjusting part 32, so as to realize stable support of the adjusting mechanism 3 in multiple directions.

[0046] It should be noted that, in other possible embodiments, the clamping mechanism 1 can also adopt other structural forms, such as an adsorbing type clamping mode of an electromagnetic chuck. The coaxiality measuring mechanism 2 can also adopt other measuring principles or structural forms, such as a non-contact type measuring mode of a laser range finder. In addition, the specific forms of the first adjusting part 31 and the second adjusting part 32 are not limited thereto, and other mechanical structures capable of realizing angle adjustment can be adopted. The position of the shaft after adjustment of the adjusting mechanism 3 can be verified by an external measuring tool, or a measuring instrument, such as a laser range finder or an optical alignment instrument, can be installed on one side of the device, so as to facilitate real-time monitoring and adjustment of the position of the shaft.

[0047] In order to better understand the present application, the following will be described in combination with Figures 1 to 5 The technical scheme of the present application will be described in detail: when the coaxiality of the motor shaft is detected, the motor is first fixed by the clamping mechanism 1, then the spatial posture of the clamping mechanism 1 is adjusted by the adjusting mechanism 3 according to the specific installation mode and position of the motor, so that the motor shaft is closer to the reference axis. Then, the coaxiality is measured by the coaxiality measuring mechanism 2. During the measurement process, the position of the dial gauge 22 can be adjusted by the position adjusting part 21, so as to detect different positions of the motor shaft.

[0048] The utility model discloses a fixing mechanism 1, coaxality measuring mechanism 2 and adjusting mechanism 3 are set up, and the fixing mechanism 1 can realize the fixation of motor, and the coaxality measuring mechanism 2 can measure the coaxality of shaft piece through the movement of measuring head relative to the clamping area, and the adjusting mechanism 3 can adjust the shaft piece to be measured and measuring head to be perpendicular, make the shaft position be closer to the reference axis, thereby avoiding the amplification of error caused by initial deviation.

[0049] In the description of the present application, it should be noted that the orientation or position relationship indicated by the terms "upper" and "lower" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise explicitly specified and limited, the terms "mounting", "connection" and "connection" should be broadly understood, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0050] It should be noted that in the present application, relational terms such as "first" and "second" and the like are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "contain" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. Without more limitations, the element defined by the sentence "including a" does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0051] The above-described specific embodiments of the utility model do not constitute a limitation on the protection scope of the utility model. Any various other corresponding changes and modifications made according to the technical concept of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. A test fixture for shaft concentricity detection, characterized by, The utility model relates to a coaxiality measuring device for shafts, comprising: a clamping mechanism including at least two clamping ends forming a clamping area of adjustable size; a coaxiality measuring mechanism having a probe for measuring the coaxiality of a shaft to be measured in the clamping area; and an adjusting mechanism connected to the clamping mechanism and the coaxiality measuring mechanism for adjusting the shaft to be measured to be vertically arranged with the probe. The at least two clamping ends are horizontally arranged and oppositely arranged.

2. The test fixture for shaft concentricity detection of claim 1, wherein, The adjusting mechanism includes a first adjusting member and a second adjusting member, the first adjusting member is connected to the clamping mechanism through the second adjusting member, the first adjusting member and the second adjusting member are both used for adjusting the installation angle of the clamping mechanism, and the adjusting axis of the first adjusting member is perpendicular to the adjusting axis of the second adjusting member.

3. A test fixture for shaft concentricity detection according to claim 1 or 2, characterized in that, The first adjusting member includes a base, a bottom plate, a top plate, an inclined plate and an adjusting bolt, the bottom plate, the top plate and the inclined plate are sequentially arranged, and the contact surfaces of the inclined plate and the top plate and the bottom plate are all inclined surfaces; the base is arranged between the bottom plate and the top plate and rotationally connected to the bottom plate and the top plate; the adjusting bolt is rotationally arranged on the base and threadedly connected to the inclined plate through the base to drive the inclined plate to move relative to the base, thereby driving the top plate to rotate relative to the bottom plate.

4. The test fixture for shaft concentricity detection of claim 3, wherein, The first adjusting member further includes a first stabilizing structure connected to the bottom plate and the top plate for fixing the bottom plate and the top plate.

5. The test fixture for shaft concentricity detection of claim 4, wherein, The side portions of the bottom plate and the top plate are respectively provided with a first sliding groove and a second sliding groove, the axis directions of the first sliding groove and the second sliding groove are respectively parallel to the bottom surface and the top surface of the inclined plate; 6. The test fixture for shaft concentricity detection of claim 5, wherein, The first stabilizing structure includes a first supporting block and a first fixing bolt, the two ends of the first supporting block are respectively slidably connected to the first sliding groove and the second sliding groove, and the first fixing bolt is penetrated through and threadedly connected to the first supporting block to be abutted with the inclined plate by rotating relative to the first supporting block. The second adjusting member includes an adjusting plate and a screw adjusting device, the adjusting plate is connected to the clamping mechanism, one end of the adjusting plate is rotationally connected to the first adjusting member, and the other end of the adjusting plate is connected to the first adjusting member through the screw adjusting device, and the screw adjusting device is used for driving the adjusting plate to rotate relative to the first adjusting member.

7. The test fixture for shaft concentricity detection of claim 3, wherein, The coaxiality measuring mechanism includes a position adjusting member and a dial indicator, the dial indicator is arranged on the position adjusting member, the position adjusting member is connected to the coaxiality measuring mechanism and used for driving the dial indicator to move along the clamping axis of the clamping mechanism and keep fixed.

8. The test fixture for shaft concentricity detection of claim 1, wherein, The position adjusting member includes a supporting rod, a sliding sleeve and a locking bolt, one end of the supporting rod is connected to the coaxiality measuring mechanism, the sliding sleeve is slidably arranged on the supporting rod, and the dial indicator is arranged on the sliding sleeve; the locking bolt is penetrated through and threadedly connected to the sliding sleeve to be abutted with the supporting rod by rotating relative to the sliding sleeve.

9. The test fixture for shaft concentricity detection of claim 8, wherein, ​ 10. The test fixture for shaft concentricity detection of claim 1, wherein, The clamping mechanism comprises a plurality of clamping claws arranged in a ring array and a plurality of clamping driving members, each of which is installed on the adjusting mechanism, and the driving end of each clamping driving member is connected with one clamping claw to drive the clamping claw to move relative to the clamping area.

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