Measuring instrument for measuring axial and radial runout of oversized belt pulley tooth profile

Abstract

The utility model discloses a measuring instrument for measuring axial and radial runout of a tooth profile of a super-large belt pulley. The measuring instrument comprises a base; a support mechanism; the detection mechanism comprises a radial dial indicator and an axial dial indicator which are respectively used for detecting radial and axial run-out conditions of the workpiece to be detected; the XY displacement platform is used for installing the detection mechanism in an up-and-down moving mode, a radial dial indicator with a measuring head abutting against the side face of the XY displacement platform is installed on the side face of the sliding table connecting plate, and a measuring needle with a needle head facing a workpiece to be measured is installed on the other side face, not connected with the sliding table connecting plate, of the XY displacement platform through a measuring needle clamp. And the side surface of the XY displacement platform is provided with an axial dial indicator of which the measuring head abuts against the side surface of the measuring needle clamp. The oversized belt pulley jumping detection device realizes oversized belt pulley jumping on-line detection, reduces detection cost, improves detection efficiency, and is suitable for jumping detection of belt pulleys of other specifications.

Description

Technical Field

[0001] The utility model relates to the technical field of toothed belt pulley runout detection, in particular to a measuring instrument for measuring the axial and radial runout of a super-large belt pulley tooth profile. Background Art

[0002] In key processes such as spinning, the existing oversized pulleys have runout size requirements for the contact surface between the pulley and the belt relative to the inner hole of the bearing, and the detection reference is the central axis of the bearing hole and the step surface of the cavity. Conventional measurement of this runout size uses an AB reference mandrel and a workpiece reference to match, and manually place the workpiece on the runout measuring instrument for measurement. However, the AB reference mandrel is not easy to process for oversized pulleys and wastes materials. At the same time, the mandrel is very heavy and difficult to move manually, making measurement difficult. Conventional runout instrument measurement requires a larger space and has a high manufacturing cost.

[0003] Therefore, the research purpose of this utility model is to design a measuring instrument for the axial and radial runout of super-large pulley teeth that can realize online detection of super-large pulley runout, reduce detection costs, improve detection efficiency, and adapt to the runout detection of pulleys of other specifications. Utility Model Content

[0004] In view of the technical problems existing in the above-mentioned prior art, the utility model provides a measuring instrument for measuring the axial and radial runout of the tooth profile of an extra-large pulley. The measuring instrument for measuring the axial and radial runout of the tooth profile of an extra-large pulley can effectively solve the technical problems existing in the above-mentioned prior art.

[0005] The technical solution of the utility model is:

[0006] A measuring instrument for measuring the axial and radial runout of a super-large pulley tooth profile, comprising:

[0007] Base;

[0008] A supporting mechanism, mounted on one side of the base and used for rotatably mounting the workpiece to be measured;

[0009] A detection mechanism is installed on the other side of the base where the support mechanism is not provided, and comprises a radial dial indicator and an axial dial indicator for respectively detecting radial and axial runout of the workpiece to be tested;

[0010] The linkage mechanism comprises an XY displacement platform installed through a slide connecting plate, a radial dial indicator with a probe abutting against the side of the XY displacement platform is installed on the side of the slide connecting plate, a probe with a needle facing the workpiece to be measured is installed on the XY displacement platform through a probe fixture, the needle of the probe abuts against the tooth groove of the workpiece to be measured, and an axial dial indicator with a probe abutting against the side of the probe fixture is installed on the side of the XY displacement platform.

[0011] The displacement mechanism is used to move the linkage mechanism longitudinally and transversely respectively, and the linkage mechanism is installed on the displacement mechanism through a slide connecting plate.

[0012] The displacement mechanism includes a horizontal linear track fixedly mounted on the base and located on the side of the support mechanism, a vertical plate is mounted on the horizontal linear track through a horizontal slide that is slidably arranged to move left and right, a vertical slide is mounted on the vertical plate through a fixed vertical linear track that moves up and down, and the XY displacement platform is mounted on the vertical slide through a slide connecting plate.

[0013] The two ends of the horizontal linear track and the vertical linear track are respectively provided with corresponding positioning locking blocks and pressing blocks, and the positioning locking blocks and pressing blocks are arranged on both sides of the horizontal slide and the vertical slide and are used to position and fix the horizontal slide and the vertical slide.

[0014] A corresponding radial gauge fixture is fixedly connected to the side of the slide connecting plate, and the radial dial indicator is locked and installed on the radial gauge fixture. A corresponding axial gauge fixture is fixedly connected to the side of the XY displacement platform, and the axial dial indicator is locked and installed on the axial gauge fixture.

[0015] The measuring needle fixture comprises an 8-shaped mounting portion and a connecting portion integrally formed and fixedly connected to a side surface of the 8-shaped mounting portion, and the measuring needle is inserted into the connecting portion of the measuring needle fixture.

[0016] The measuring needle is movably inserted into the connecting part of the measuring needle fixture, and the middle part of the 8-shaped mounting part is provided with a accommodating cavity connected to the embedding hole of the connecting part through sealing plates fixedly connected to both sides thereof, and the accommodating cavity is externally connected to an external pneumatic control system through corresponding air guide pipes, solenoid valves and pressure gauges, and a pressure relief pipe is installed on the air guide pipe between the solenoid valve and the accommodating cavity through a corresponding pressure relief valve; a corresponding braking mechanism is installed at the end of the measuring needle fixture located at the connecting part, and the braking mechanism limits and fixes the measuring needle after actuation; after the workpiece to be measured is installed in place, the external pneumatic control system starts to transport gas into the accommodating cavity of the measuring needle fixture and forms a positive pressure to push the measuring needle to move outward, and the pressure is stably maintained at the state of P1 value. When the needle tip of the measuring needle abuts against the workpiece to be measured and the pressure rises from P1 value to P2 value, the braking mechanism is actuated and fixes the measuring needle, and then the solenoid valve is closed and the pressure relief valve is opened to release the pressure.

[0017] The measuring needle comprises a rigid detection section, an elastic buffer section and a rigid extension section which are sequentially connected front and back. The rigid detection section and the rigid extension section are connected by the elastic buffer section, and the braking mechanism is fixed on the rigid detection section.

[0018] The probe fixture is fixedly mounted on the XY displacement platform by bolts inserted through the 8-shaped mounting portion, the bolts are arranged on the upper and lower sides of the connecting portion on the probe fixture, and the height of the lower end of the 8-shaped mounting portion at the connecting portion is greater than the height of the upper end.

[0019] The support mechanism includes a bearing seat fixed to one side above the base by a plurality of bolts at the bottom, the top of the bearing seat is provided with a support base through its intermediate axis positioning and a corresponding horizontal bearing, and the workpiece to be measured is installed above the support base through a corresponding pad assembly.

[0020] The pad block assembly includes a first pad block fixed above the support base by bolts and used to position the workpiece to be measured, and a second pad block that is positioned and sleeved and installed on the outside of the intermediate shaft of the first pad block by corresponding bolts, and the second pad block is used to support the workpiece to be measured.

[0021] Advantages of the utility model:

[0022] 1) The utility model adopts an axial and radial runout measuring instrument to measure the runout of the workpiece to be measured. The operation is simple, efficient, highly versatile and low in detection cost, and online detection can be realized; online detection of super-large pulley runout can be realized, detection cost can be reduced, detection efficiency can be improved, and the utility model is suitable for detection of pulley runout of other specifications.

[0023] 2) The utility model adopts a linkage mechanism in combination with a displacement mechanism to install the detection mechanism, which not only facilitates the up and down movement of the detection mechanism to facilitate the installation of the pulley to be tested and the positioning of the detection mechanism, but also utilizes an XY displacement platform and other structures to connect and install a radial dial indicator and an axial dial indicator, so that the two are linked to form a whole, which is beneficial for synchronous radial and axial detection during detection, and the detection accuracy and efficiency are improved.

[0024] 3) The utility model has a support base installed above the bearing seat through the intermediate shaft positioning and the corresponding horizontal bearing, and uses the first pad block for positioning and the second pad block for supporting to stably install the extra-large workpiece to be measured. The installation is simple, ensuring the stability of the rotation of the workpiece to be measured and thus promoting the improvement of detection efficiency.

[0025] 4) The utility model can effectively and adaptively control the movement and braking fixation of the measuring needle according to the pressure change before and after the measuring needle contacts the workpiece to be measured, thereby realizing automatic adjustment of the position of the detection probe before and after the workpiece to be measured on the basis of facilitating the installation of the workpiece to be measured, and significantly improving the convenience of detection.

[0026] 5) The utility model provides a receiving chamber in the measuring needle fixture for installing the measuring needle, and the receiving chamber is connected to the external pneumatic control system through the corresponding air guide tube, the electromagnetic valve and the pressure gauge. A pressure relief pipe is installed on the air guide tube between the electromagnetic valve and the receiving chamber through the corresponding pressure relief valve, and an annular electromagnet is installed at the connecting part of the measuring needle fixture. Before the workpiece to be measured is installed, the pressure relief valve is opened, the measuring needle is pushed into the connecting part and the pressure relief valve is closed. After the workpiece to be measured is installed in place, the external pneumatic control system starts to transport gas to the receiving chamber of the measuring needle fixture and form a positive pressure to push the measuring needle outward. Move, the pressure is stably maintained at the state of P1 value, so that before and after each installation of the workpiece to be measured, there is no need to manually move the detection mechanism left and right to facilitate the installation and detection of the workpiece to be measured, which reduces labor intensity and improves the convenience and practical effect of operation; when the needle tip of the measuring needle abuts against the workpiece to be measured and the pressure rises from P1 value to P2 value, the annular electromagnet is energized to fix the measuring needle, and then the solenoid valve is closed and the pressure relief valve is opened to release the pressure, and the measuring needle is fixed by energizing the annular electromagnet through pressure relief, and the retractable installation position of the measuring needle is determined by using the pressure change, so that the operation is more precise and the practical performance is further improved.

[0027] 6) When in use, the pressure relief valve is opened before the workpiece to be measured is inspected and installed, the measuring needle is pushed inward to make way for the installation of the workpiece to be measured, and the pressure relief valve is closed; after the workpiece to be measured is installed, the external pneumatic control system is pneumatically operated and the solenoid valve is opened, and the pressure is stably maintained at the P1 value to push the measuring needle outward. When the needle tip of the measuring needle abuts against the workpiece to be measured and the pressure rises from the P1 value to the P2 value, the annular electromagnet is energized to fix the measuring needle, and then the solenoid valve is closed and the pressure relief valve is opened to release the pressure; the present invention uses the positive pressure of the intake air to push and controls the stopping of the measuring needle according to the change of the pressure value, and can effectively ensure that it abuts in place under a relatively low extrusion force.

[0028] On the basis of the above, the measuring needle is set to three sections, namely, a rigid detection section, an elastic buffer section and a rigid extension section which are connected in sequence in the front and back; the inflation positive pressure push has a certain moving rate, and the measuring needle needs to be pushed by corresponding pressure before it abuts the workpiece to be measured, and the pressure needs to rise to judge whether it is abutted in place. Therefore, an elastic buffer section is further set in the measuring needle. When the pressure gradually rises after the measuring needle abuts the workpiece to be measured, the elastic buffer section is used to buffer and release the pressure to avoid the rising pressure acting on the workpiece to be measured. This not only protects the workpiece to be measured and the measuring needle, but also improves the practicability and accuracy of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of the utility model.

[0030] Figure 2 for Figure 1 Schematic cross-section diagram.

[0031] Figure 3This is a schematic diagram of the structure of Example 3 of the utility model.

[0032] Figure 4 It is a schematic cross-sectional view of Example 4 of the utility model.

[0033] In the accompanying drawings: base 1, workpiece to be measured 2, radial dial indicator 3, axial dial indicator 4, horizontal linear rail 5, horizontal slide 6, vertical plate 7, vertical linear rail 8, vertical slide 9, slide connecting plate 10, XY displacement platform 11, measuring needle 12, rigid detection section 1201, elastic buffer section 1202, rigid extension section 1203, bearing seat 13, horizontal bearing 14, supporting base 15, first cushion block 16, second cushion block 17, radial dial indicator fixture 18, axial dial indicator fixture 19, measuring needle fixture 20, 8-shaped mounting portion 201, connecting portion 202, positioning locking block 21, adjusting screw 22, solenoid valve 23, air pressure gauge 24, pressure relief valve 25, annular electromagnet 26. DETAILED DESCRIPTION

[0034] In order to facilitate understanding by those skilled in the art, the structure of the present invention is further described in detail with reference to the accompanying drawings:

[0035] Example 1

[0036] refer to Figure 1-2 , a measuring instrument for measuring the axial and radial runout of a super-large pulley tooth profile, comprising:

[0037] Base 1;

[0038] A supporting mechanism, mounted on one side of the base 1 and used for rotatably mounting the workpiece 2 to be measured;

[0039] A detection mechanism is installed on the other side of the base 1 where the support mechanism is not provided, and comprises a radial dial gauge 3 and an axial dial gauge 4 for respectively detecting radial and axial runout of the workpiece 2 to be tested;

[0040] The linkage mechanism comprises an XY displacement platform 11 installed through a slide connecting plate 10, a radial dial indicator 3 with a probe abutting against the side of the XY displacement platform 11 is installed on the side of the slide connecting plate 10, a probe 12 with a needle facing the workpiece 2 to be measured is installed on the XY displacement platform 11 through a probe fixture 20, the needle of the probe 12 abuts against the tooth groove of the workpiece 2 to be measured, and an axial dial indicator 4 with a probe abutting against the side of the probe fixture 20 is installed on the side of the XY displacement platform 11;

[0041] The displacement mechanism is used to move the linkage mechanism longitudinally and transversely respectively, and the linkage mechanism is installed on the displacement mechanism through a slide connecting plate 10.

[0042] The utility model adopts an axial and radial runout measuring instrument to measure the runout of the workpiece to be measured. The operation is simple and efficient, the versatility is high and the detection cost is low, and online detection can be realized; online detection of super-large pulley runout can be realized, the detection cost can be reduced, the detection efficiency can be improved, and the detection of pulley runout of other specifications can be adapted.

[0043] The displacement mechanism includes a horizontal linear track 5 fixedly mounted on the base 1 and located on the side of the support mechanism, a vertical plate 7 is mounted on the horizontal linear track 5 via a horizontal slide 6 that is slidably arranged so as to move left and right, a vertical slide 9 is mounted on the vertical plate 7 via a fixed vertical linear track 8 so as to move up and down, and the XY displacement platform 11 is mounted on the vertical slide 9 via a slide connecting plate 10.

[0044] The utility model adopts a linkage mechanism in combination with a displacement mechanism for installing a detection mechanism, which not only facilitates the up and down movement of the detection mechanism to facilitate the installation of the pulley to be tested and the positioning of the detection mechanism, but also utilizes an XY displacement platform 11 and other structures in combination to connect and install a radial dial indicator 3 and an axial dial indicator 4, so that the two are linked to form a whole, which is beneficial to synchronous radial and axial detection during detection, and the detection accuracy and efficiency are improved.

[0045] The two ends of the horizontal linear rail 5 and the vertical linear rail 8 are respectively provided with corresponding positioning locking blocks 21 and pressure blocks. The positioning locking blocks 21 and pressure blocks are arranged on both sides of the horizontal slide 6 and the vertical slide 9 and are used to position and fix the horizontal slide 6 and the vertical slide 9.

[0046] The side of the slide connecting plate 10 is fixedly connected with a corresponding radial gauge fixture 18, and the radial dial indicator 3 is locked and installed on the radial gauge fixture 18. The side of the XY displacement platform 11 is fixedly connected with a corresponding axial gauge fixture 19, and the axial dial indicator 4 is locked and installed on the axial gauge fixture 19.

[0047] The measuring needle fixture 20 comprises an 8-shaped mounting portion 201 and a connecting portion 202 integrally formed and fixedly connected to a side of the 8-shaped mounting portion 201 . The measuring needle 12 is inserted into the connecting portion 202 of the measuring needle fixture 20 .

[0048] The measuring needle fixture 20 is fixedly mounted on the XY displacement platform 11 by means of bolts inserted through the 8-shaped mounting portion 201. The bolts are arranged on the measuring needle fixture 20 at the upper and lower sides of the connecting portion 202, and the height of the lower end of the 8-shaped mounting portion 201 at the connecting portion 202 is greater than the height of the upper end.

[0049] The support mechanism includes a bearing seat 13 fixed to one side above the base 1 by a plurality of bolts at the bottom, a support base 15 is installed on the top of the bearing seat 13 through its intermediate axis positioning and a corresponding horizontal bearing 14, and the workpiece 2 to be measured is installed above the support base 15 through a corresponding pad assembly.

[0050] The pad block assembly includes a first pad block 16 which is fixed on the support base 15 by bolts and is used to position the workpiece 2 to be measured, and a second pad block 17 which is positioned and sleeved and installed on the outside of the intermediate shaft of the first pad block 16 by corresponding bolts, and the second pad block 17 is used to support the workpiece 2 to be measured.

[0051] The utility model is provided with a support base 15 above the bearing seat 13 through the intermediate shaft positioning and the corresponding horizontal bearing 14, and cooperates with the first cushion block 16 for positioning and the second cushion block 17 for supporting so as to stably install the extra-large workpiece to be measured. The installation is simple, and the stability of the rotation of the workpiece to be measured is ensured, thereby promoting the improvement of the detection efficiency.

[0052] A plurality of adjusting screws 22 for adjusting the levelness are arranged at intervals around the base 1 .

[0053] Example 2

[0054] The difference from the first embodiment is that a pressing plate for locking and fixing the workpiece to be measured and the supporting mechanism is further provided on the workpiece to be measured.

[0055] Example 3

[0056] refer to Figure 3 , which is different from Example 1, is that the measuring needle 12 can be movably inserted into the connecting portion 202 of the measuring needle fixture 20, and the middle part of the 8-shaped mounting portion 201 is provided with a receiving cavity connected to the embedding hole of the connecting portion 202 through sealing plates fixedly connected to both sides thereof, and the receiving cavity is connected to the external pneumatic control system through corresponding air guide pipes, solenoid valves 23 and pressure gauges 24, and a pressure relief pipe is installed on the air guide pipe between the solenoid valve 23 and the receiving cavity through corresponding pressure relief valves 25; the measuring needle fixture 20 is located at the A corresponding braking mechanism is installed at the end of the connecting portion 202, and the braking mechanism limits and fixes the measuring needle 12 after being actuated; after the workpiece 2 to be measured is installed in place, the external pneumatic control system starts to transport gas to the accommodating cavity of the measuring needle fixture 20 and forms a positive pressure to push the measuring needle 12 to move outward, and the pressure is stably maintained at the P1 value. When the needle tip of the measuring needle 12 abuts against the workpiece 2 to be measured and the pressure rises from the P1 value to the P2 value, the braking mechanism is actuated and fixes the measuring needle 12, and then the solenoid valve 23 is closed and the pressure relief valve 25 is opened to relieve the pressure.

[0057] The utility model can effectively and adaptively control the movement and braking fixation of the measuring needle 12 according to the pressure change before and after the measuring needle 12 abuts against the workpiece 2 to be measured, thereby realizing automatic adjustment of the position of the detection probe before and after the detection of the workpiece 2 to be measured on the basis of facilitating the installation of the workpiece 2 to be measured, and significantly improving the convenience of detection; and then utilize the displacement mechanism to uniformly move the detection mechanism left and right and up and down to facilitate the installation of pulleys to be measured of different sizes and the positioning of the detection mechanism, so as to be suitable for the detection of workpieces to be measured of different sizes, and further improve the practical effect.

[0058] The braking mechanism includes an annular electromagnet 26 installed at the end of the connecting portion 202. The measuring needle 12 is an iron measuring needle. The annular electromagnet 26 fixes and limits the measuring needle 12 when energized. The braking mechanism can be replaced with other structures, and the braking mechanism is used to fix the measuring needle 12 after actuation.

[0059] The utility model is provided with a receiving cavity in the measuring needle fixture 20 for installing the measuring needle, and the receiving cavity is connected to the outside pneumatic control system through the corresponding air guide pipe, the electromagnetic valve 23 and the pressure gauge 24. A pressure relief pipe is connected and installed on the air guide pipe between the electromagnetic valve 23 and the receiving cavity through the corresponding pressure relief valve 25, and an annular electromagnet 26 is installed at the connecting part port of the measuring needle fixture 20; before the workpiece 2 to be measured is installed, the pressure relief valve 25 is opened, and the measuring needle 12 is pushed into the connecting part 202 and the pressure relief valve 25 is closed. After the workpiece 2 to be measured is installed in place, the external pneumatic control system starts to transport gas to the receiving cavity of the measuring needle fixture 20 and form a positive pressure to push the measuring needle 12 into the receiving cavity. The measuring needle 12 moves outward, and the pressure is stably maintained at the P1 value, so that the installation of the workpiece 2 to be measured can be facilitated without manually moving the detection mechanism left and right before and after each installation of the workpiece to be measured, thereby reducing labor intensity and improving the convenience and practical effect of operation; when the needle head of the measuring needle 12 abuts against the workpiece 2 to be measured and the pressure rises from the P1 value to the P2 value, the annular electromagnet 26 is energized to fix the measuring needle 12, and then the solenoid valve 23 is closed and the pressure relief valve 25 is opened to relieve pressure. The measuring needle 12 is fixed by energizing the annular electromagnet 26 through pressure relief, and the telescopic installation position of the measuring needle 12 is determined by using the pressure change, so that the operation is more precise and the practical performance is further improved.

[0060] Example 4

[0061] refer to Figure 4 , which is different from Example 3, is that the measuring needle 12 includes a rigid detection section 1201, an elastic buffer section 1202 and a rigid extension section 1203 which are sequentially connected front to back, the rigid detection section 1201 and the rigid extension section 1203 are connected by the elastic buffer section 1202, and the braking mechanism is fixed on the rigid detection section 1201.

[0062] When in use, the pressure relief valve 25 is opened before the workpiece 2 to be measured is inspected and installed, the measuring needle 12 is pushed inward to make way for the installation of the workpiece 2 to be measured, and the pressure relief valve 25 is closed; after the workpiece 2 to be measured is installed, the external pneumatic control system is pneumatically operated and the solenoid valve 23 is opened, and the pressure is stably maintained at the P1 value to push the measuring needle 12 to move outward, and when the needle head of the measuring needle 12 abuts against the workpiece 2 to be measured and the pressure rises from the P1 value to the P2 value (the P1 value and the P2 value are debugged and determined), the annular electromagnet 26 is energized to fix the measuring needle 12, and then the solenoid valve 23 is closed and the pressure relief valve 25 is opened to release the pressure; the present invention uses the positive pressure of the intake air to push and controls the stop of the measuring needle 12 according to the change of the pressure value, and can effectively ensure that it abuts in place under a relatively low extrusion force.

[0063] On the basis of the above, the measuring needle 12 is set to three sections, namely, a rigid detection section 1201, an elastic buffer section 1202 and a rigid extension section 1203 which are connected in sequence in the front and back; the inflation positive pressure push has a certain moving rate, and the measuring needle 12 needs to be pushed by corresponding pressure before it abuts against the workpiece 2 to be measured, and the pressure needs to rise to judge whether it is abutted in place, so an elastic buffer section 1202 is further provided in the measuring needle 12, and when the pressure gradually rises after the measuring needle 12 abuts against the workpiece 2 to be measured, the elastic buffer section 1202 is used to buffer and release the pressure, so as to avoid the rising pressure from acting on the workpiece 2 to be measured, which not only protects the workpiece 2 to be measured and the measuring needle 12, but also improves the practicability and accuracy of the equipment.

[0064] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A measuring instrument for measuring the axial and radial runout of a super-large pulley tooth profile, characterized in that: include: Base (1); A supporting mechanism, mounted on one side of the base (1) and used for rotatably mounting the workpiece (2) to be measured; A detection mechanism is installed on the other side of the base (1) where the support mechanism is not provided, and comprises a radial dial gauge (3) and an axial dial gauge (4) for respectively detecting radial and axial runout of the workpiece (2) to be tested; The linkage mechanism comprises an XY displacement platform (11) installed via a slide connecting plate (10), a radial dial indicator (3) with a probe abutting against the side of the XY displacement platform (11) being installed on the side of the slide connecting plate (10), a probe (12) with its needle facing the workpiece (2) to be measured being installed on the XY displacement platform (11) via a probe fixture (20), the needle of the probe (12) abutting against the tooth groove of the workpiece (2) to be measured, and an axial dial indicator (4) with its probe abutting against the side of the probe fixture (20) being installed on the side of the XY displacement platform (11); The displacement mechanism is used to move the linkage mechanism longitudinally and transversely respectively, and the linkage mechanism is mounted on the displacement mechanism via a slide connecting plate (10).

2. The measuring instrument for measuring the axial and radial runout of the tooth profile of an oversized pulley according to claim 1, characterized in that: The displacement mechanism comprises a horizontal linear track (5) fixedly mounted on the base (1) and located on the side of the support mechanism; a vertical plate (7) is mounted on the horizontal linear track (5) for left-right movement via a slidable horizontal slide (6); a vertical slide (9) is mounted on the vertical plate (7) for up-and-down movement via a fixed vertical linear track (8); and the XY displacement platform (11) is mounted on the vertical slide (9) via a slide connecting plate (10).

3. The measuring instrument for measuring the axial and radial runout of the tooth profile of an oversized pulley according to claim 2, characterized in that: The two ends of the horizontal linear track (5) and the vertical linear track (8) are respectively provided with corresponding positioning locking blocks (21) and pressing blocks. The positioning locking blocks (21) and pressing blocks are arranged on the two side edges of the horizontal slide (6) and the vertical slide (9) and are used to position and fix the horizontal slide (6) and the vertical slide (9).

4. The measuring instrument for measuring the axial and radial runout of the tooth profile of an oversized pulley according to claim 1, characterized in that: A corresponding radial gauge fixture (18) is fixedly connected to the side of the slide connecting plate (10), and the radial dial gauge (3) is locked and mounted on the radial dial gauge fixture (18). A corresponding axial gauge fixture (19) is fixedly connected to the side of the XY displacement platform (11), and the axial dial gauge (4) is locked and mounted on the axial gauge fixture (19).

5. The measuring instrument for measuring the axial and radial runout of the tooth profile of an oversized pulley according to claim 1, characterized in that: The measuring needle fixture (20) comprises an 8-shaped mounting portion (201) and a connecting portion (202) integrally formed and fixedly connected to the side of the 8-shaped mounting portion (201), and the measuring needle (12) is inserted into the connecting portion (202) of the measuring needle fixture (20).

6. The measuring instrument for measuring the axial and radial runout of the tooth profile of an oversized pulley according to claim 5, characterized in that: The measuring needle (12) can be movably inserted into the connecting portion (202) of the measuring needle fixture (20); the middle part of the 8-shaped mounting portion (201) is provided with a receiving cavity communicating with the mounting hole of the connecting portion (202) through sealing plates fixedly connected to both sides thereof; the receiving cavity is externally connected to an external pneumatic control system through a corresponding air guide pipe, an electromagnetic valve (23) and a pressure gauge (24); a pressure relief pipe is connected and installed on the air guide pipe between the electromagnetic valve (23) and the receiving cavity through a corresponding pressure relief valve (25); the measuring needle fixture (20) is located at the connecting portion (20 A corresponding braking mechanism is installed at the end of the measuring needle (12), and the braking mechanism is activated to limit and fix the measuring needle (12); after the workpiece (2) to be measured is installed in place, the external pneumatic control system is activated to transport gas to the accommodating chamber of the measuring needle fixture (20) and form a positive pressure to push the measuring needle (12) to move outward, and the pressure is stably maintained at a value of P1. When the needle head of the measuring needle (12) abuts against the workpiece (2) to be measured and the pressure rises from the value of P1 to the value of P2, the braking mechanism is activated to fix the measuring needle (12), and then the solenoid valve (23) is closed and the pressure relief valve (25) is opened to relieve pressure.

7. The measuring instrument for measuring the axial and radial runout of the tooth profile of an oversized pulley according to claim 6, characterized in that: The measuring needle (12) comprises a rigid detection section (1201), an elastic buffer section (1202) and a rigid extension section (1203) which are sequentially connected in front and back; the rigid detection section (1201) and the rigid extension section (1203) are connected by the elastic buffer section (1202), and the braking mechanism is fixed on the rigid detection section (1201).

8. The measuring instrument for measuring the axial and radial runout of the tooth profile of an oversized pulley according to claim 5, characterized in that: The measuring needle fixture (20) is fixedly mounted on the XY displacement platform (11) by means of bolts inserted through the 8-shaped mounting portion (201); the bolts are arranged on the measuring needle fixture (20) at the upper and lower sides of the connecting portion (202); and the height of the lower end of the 8-shaped mounting portion (201) located at the connecting portion (202) is greater than the height of the upper end.

9. The measuring instrument for measuring the axial and radial runout of the tooth profile of an oversized pulley according to claim 1, characterized in that: The support mechanism comprises a bearing seat (13) fixed to one side above the base (1) by a plurality of bolts at the bottom, a support base (15) is installed on the top of the bearing seat (13) through its intermediate shaft positioning and a corresponding horizontal bearing (14), and the workpiece (2) to be measured is installed above the support base (15) through a corresponding pad assembly.

10. The measuring instrument for measuring the axial and radial runout of the tooth profile of an oversized pulley according to claim 9, characterized in that: The pad block assembly comprises a first pad block (16) which is fixed on the support base (15) by bolt locking and is used to position the workpiece (2) to be measured, and a second pad block (17) which is positioned and sleeved and installed on the outer side of the intermediate shaft of the first pad block (16) by corresponding bolt locking, and the second pad block (17) is used to support the workpiece (2) to be measured.

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