Integrated adjustable tool for motorized spindle multi-parameter test

Abstract

The invention discloses an integrated adjustable tool for motorized spindle multi-parameter testing, and belongs to the technical field of motorized spindle performance testing. The tool comprises a lifting base, an X-direction displacement platform, a Y-direction displacement platform, a connecting block and a V-shaped SEA probe groove, wherein the X-direction displacement platform and the Y-direction displacement platform are sequentially arranged on the lifting base, and the connecting block and the V-shaped SEA probe groove are fixed to the Y-direction platform and jointly achieve three-dimensional coarse adjustment of the probe groove. The tool is further provided with a fine adjustment module integrated above the connecting block, the module is connected with the fine adjustment top plate and the bottom plate through a plate spring, and fine angle calibration of an encoder reading head fixed to the fine adjustment top plate is achieved through fine adjustment studs which are arranged diagonally and provided with adjusting discs. According to the invention, the problems of SEA probe position adjustment and front-end encoder installation and positioning are synchronously solved through an integrated structure, and the device is especially suitable for efficient and accurate synchronous testing of the rotation error and the rotation frequency response function of an independent motorized spindle in a laboratory environment.

Description

Technical Field

[0001] This invention relates to the field of electric spindle performance testing technology, and more specifically to an integrated adjustable tooling for multi-parameter testing of electric spindles. Background Technology

[0002] As a core functional component of high-end CNC machine tools and precision equipment, the dynamic performance of electric spindles directly affects machining accuracy and equipment reliability. Among the many indicators for evaluating electric spindle performance, rotational accuracy and system rotational frequency response function are two key parameters.

[0003] The rotational accuracy of an electric spindle is reflected by its rotational error. Currently, spindle error analysis (SEA) is commonly used to measure this error. This method requires mounting a standard bar on the electric spindle and using a sensor probe aligned with the spherical surface of the standard bar for non-contact measurement. Due to the extremely high accuracy requirements, the distance between the sensor probe and the standard bar surface must be precisely set and kept stable. In horizontal electric spindle testing platforms or machine tool integrated environments, the position of the standard bar is often adjusted by the machine tool's own motion axis, thereby indirectly calibrating the probe position. In this case, the probe fixture only needs to be simply fixed to the machine tool's rotary table. However, when conducting offline testing of independent electric spindles in a laboratory environment, the lack of machine tool motion axis assistance necessitates that the probe fixture itself possess multi-degree-of-freedom precision adjustment capabilities. Most existing fixtures are fixed structures, which cannot achieve convenient and precise adjustment of the probe position, severely impacting testing efficiency and accuracy.

[0004] On the other hand, measuring the frequency response function of the electric spindle requires an additional encoder (circular grating and reading head) to be installed at the front end of the spindle, and to synchronize data with the encoder built into the tail end of the spindle. However, the standard bar provided by SEA equipment manufacturers usually does not allow for secondary machining. How to reliably install and fix the circular grating of the front encoder without damaging the standard bar becomes a major challenge in actual testing. At the same time, it is also necessary to ensure that there is no spatial interference between the installed circular grating and the probe slot used to fix the SEA probe, which further increases the complexity of the tooling design.

[0005] In summary, the existing technology lacks an integrated, adjustable, dedicated tooling that can simultaneously solve the two major problems of precise adjustment of the SEA probe position and reliable installation of the encoder circular grating on the standard bar, making it difficult to meet the needs of efficient and accurate comprehensive performance testing of electric spindles in a laboratory environment. Summary of the Invention

[0006] In view of this, the present invention provides an integrated adjustable tooling for multi-parameter testing of electric spindles, aiming to solve the above-mentioned technical problems.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: An integrated adjustable fixture for multi-parameter testing of an electric spindle includes: Lifting base; An X-axis displacement platform and a Y-axis displacement platform are stacked sequentially on the top surface of the lifting base. A connecting block is fixed to the top surface of the Y-axis displacement platform, and a V-shaped SEA probe groove is fixed to the side wall of the connecting block. The X-axis displacement platform, the Y-axis displacement platform, and the lifting base can work together to move the SEA probe groove in three-dimensional space. The fine-tuning module includes a fine-tuning base plate fixed to the top surface of the connecting block, a fine-tuning top plate connected to the top surface of the fine-tuning base plate via a leaf spring, and fine-tuning studs threadedly connected to opposite corners of the fine-tuning base plate. Each fine-tuning stud has an adjustment disc with an outer diameter extending beyond the outer edges of the fine-tuning base plate and the fine-tuning top plate. A reading head mounting plate is fixed to the top surface of the fine-tuning top plate, and an encoder reading head corresponding to the SEA probe slot is fixed to the reading head mounting plate.

[0008] Through the above technical solution, this invention combines the SEA probe slot with an integrated three-dimensional displacement platform and an independent fine-tuning module, realizing convenient and precise adjustment of the SEA probe's spatial position, and simultaneously completing the integrated fixation and fine calibration of the front-end encoder reading head. This effectively solves the technical problems of difficult probe adjustment, inconvenient encoder installation, and spatial interference between the two when synchronously testing the rotational error and rotational frequency response function of an independent electric spindle in a laboratory environment, significantly improving the efficiency and accuracy of the test.

[0009] Preferably, in the above-mentioned integrated adjustable fixture for multi-parameter testing of an electric spindle, the lifting base includes a lifting base plate, a lifting top plate, and two X-shaped supports connected between the lifting base plate and the lifting top plate. The two supports are hinged at their middle sections, and one end of each support on the same side is hinged to the lifting base plate and the lifting top plate via a rotating shaft. The other end of each support is hinged to a slider, and the two sliders are slidably connected to sliding frames on the lifting base plate and the lifting top plate, respectively. A lifting adjustment screw is rotatably connected to the sliding frame on the lifting top plate. The lifting adjustment screw passes through the corresponding slider and is threadedly connected to the slider. An adjustment handwheel is fixed to the end of the lifting adjustment screw.

[0010] Preferably, in the above-mentioned integrated adjustable fixture for multi-parameter testing of an electric spindle, both the X-axis displacement platform and the Y-axis displacement platform are composed of a horizontal displacement base plate and a horizontal displacement top plate. The horizontal displacement base plate and the horizontal displacement top plate are slidably connected by a slide rail structure. An adjusting tension spring is connected to the gap between the sliding mating surfaces of the horizontal displacement base plate and the horizontal displacement top plate. A stud adjusting bracket is fixed to one side of the horizontal displacement base plate. A horizontal adjusting stud is threaded onto the stud adjusting bracket. The horizontal adjusting stud is used to push the horizontal displacement top plate, thereby realizing the movement of the horizontal displacement top plate relative to the horizontal displacement base plate. The axial direction of the horizontal adjusting stud is the same as the axial direction of the slide rail structure and the adjusting tension spring.

[0011] Preferably, in the above-mentioned integrated adjustable fixture for multi-parameter testing of an electric spindle, the horizontal adjustment stud of the X-axis displacement platform is arranged perpendicularly to the horizontal adjustment stud of the Y-axis displacement platform.

[0012] Preferably, in the above-mentioned integrated adjustable fixture for multi-parameter testing of an electric spindle, the horizontal displacement base plate of the X-axis displacement platform is fixed to the top surface of the lifting top plate via a connecting seat, the horizontal displacement base plate of the Y-axis displacement platform is fixed to the top surface of the horizontal displacement top plate of the X-axis displacement platform, and the horizontal displacement top plate of the Y-axis displacement platform is fixedly connected to the connecting block.

[0013] Preferably, in the above-mentioned integrated adjustable fixture for multi-parameter testing of an electric spindle, a positioning plate is fixed to one side of the horizontal displacement base plate parallel to the horizontal adjustment stud. A strip hole is opened at the corresponding position of the positioning plate and the edge of the horizontal displacement top plate. A positioning bolt passes through the strip hole. The positioning bolt is threaded to the edge of the horizontal displacement top plate and can press the positioning plate.

[0014] Preferably, in the above-mentioned integrated adjustable fixture for multi-parameter testing of an electric spindle, multiple sets of corresponding tension spring connection holes are provided between the fine-tuning base plate and the fine-tuning top plate. A pull rod is fixed in the tension spring connection hole, and the pull rods in two corresponding upper and lower tension spring connection holes are used to connect auxiliary tension springs.

[0015] Preferably, in the above-mentioned integrated adjustable fixture for multi-parameter testing of an electric spindle, the bottom surface of the fine-tuning top plate is provided with a groove for avoiding the adjustment disc.

[0016] Preferably, in the above-mentioned integrated adjustable fixture for multi-parameter testing of an electric spindle, an auxiliary adjusting bolt is threadedly connected to the fine-tuning base plate, and the auxiliary adjusting bolt is located at a corner of the fine-tuning base plate where the fine-tuning stud is not connected.

[0017] Preferably, in the above-mentioned integrated adjustable fixture for multi-parameter testing of an electric spindle, the clamp formed by the SEA probe slot and the encoder reading head is used to hold the circular grating fixed on the standard bar.

[0018] As can be seen from the above technical solution, compared with the prior art, the present invention discloses an integrated adjustable tooling for multi-parameter testing of electric spindles, which has the following beneficial effects: 1. Integrated and synchronously fixed: The mounting base of the SEA probe and the front encoder reading head is integrated into the same tooling, which solves the problem that the two sensors need to be installed and debugged separately, which is cumbersome and prone to mutual interference. It realizes the synchronous test preparation of the electric spindle rotation error and rotation frequency response function.

[0019] 2. Multi-level precision adjustment and convenient operation: The probe position can be coarsely adjusted over a wide range through a three-dimensional displacement platform, and the encoder reading head posture can be finely adjusted at the micron level through an independent fine adjustment module. This meets the needs of precise and convenient adjustment of the sensor's spatial position in a laboratory environment, and significantly improves debugging efficiency and positioning accuracy.

[0020] 3. Stable structure and reliable locking: Each adjustment mechanism is designed with a special locking device to ensure that the moving parts are firmly locked after adjustment, preventing position displacement due to vibration or external force during testing, thus ensuring the stability of the testing process and the reliability of the data.

[0021] 4. Good compatibility and protection of workpieces: The tooling design makes full use of the original structure of the standard bar for accessory fixation, eliminating the need for secondary machining of the expensive SEA standard bar. This protects the key measurement reference parts and reduces the threshold and cost of use. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0023] Figure 1 The attached figure is a structural schematic diagram of the integrated adjustable tooling for multi-parameter testing of electric spindles provided by the present invention in its usage state; Figure 2 The attached figure is a structural schematic diagram of the lifting base provided by the present invention; Figure 3 The attached figure is a schematic diagram of the X-axis displacement platform and the Y-axis displacement platform provided by the present invention; Figure 4The attached figure is a schematic diagram of the structure of the fine-tuning module provided by the present invention connecting the SEA probe slot and the reading head mounting plate; Figure 5 The attached figure is a schematic diagram of the structure of the fine-tuning module provided by the present invention; Figure 6 The attached figure is a schematic diagram of the structure of the fine-tuning module provided by the present invention with the fine-tuning top plate removed; Figure 7 The attached figure is a schematic diagram of the structure for finely adjusting the top plate's upward viewing angle provided by the present invention; Figure 8 The attached figure is a schematic diagram of the structure of the standard rod provided by the present invention.

[0024] in: 1-Lifting base; 11-Lifting base plate; 12-Lifting top plate; 13-Bracket; 14-Rotating shaft; 15-Slider; 16-Sliding frame; 17-Lifting adjustment screw; 18-Adjusting handwheel; 19-Connecting seat; 2-X-direction displacement platform; 21-horizontal displacement base plate; 22-horizontal displacement top plate; 23-slide track structure; 24-adjusting tension spring; 25-stud adjustment bracket; 26-horizontal adjusting stud; 27-positioning plate; 271-strip hole; 28-positioning bolt; 3-Y displacement platform; 4-Fine-tuning module; 41-Fine-tuning base plate; 42-Leaf spring; 43-Fine-tuning top plate; 431-Slot; 44-Fine-tuning stud; 45-Adjusting disc; 46-Tension spring connecting hole; 47-Pull rod; 48-Auxiliary adjusting bolt; 5-Connecting block; 6-SEA probe slot; 7-Reader head mounting plate; 71-Encoder reader head; 8 - Standard bar; 81 - Circular grating. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] See appendix Figure 1 To be continued Figure 7 This invention discloses an integrated adjustable fixture for multi-parameter testing of an electric spindle, comprising: Lifting base 1; An X-axis displacement platform 2 and a Y-axis displacement platform 3 are stacked on top of the lifting base 1. A connecting block 5 is fixed on the top surface of the Y-axis displacement platform 3, and a V-shaped SEA probe groove 6 is fixed on the side wall of the connecting block 5. The X-axis displacement platform 2, the Y-axis displacement platform 3 and the lifting base 1 can work together to realize the movement of the SEA probe groove 6 in three-dimensional space. The fine-tuning module 4 includes a fine-tuning base plate 41 fixed to the top surface of the connecting block 5. A fine-tuning top plate 43 is connected to the top surface of the fine-tuning base plate 41 via a leaf spring 42. Fine-tuning studs 44 are threaded to the diagonals of the fine-tuning base plate 41. The fine-tuning studs 44 have adjustment discs 45 with an outer diameter that extends beyond the outer edges of the fine-tuning base plate 41 and the fine-tuning top plate 43. A reading head mounting plate 7 is fixed to the top surface of the fine-tuning top plate 43. An encoder reading head 71 corresponding to the SEA probe slot 6 is fixed to the reading head mounting plate 7.

[0027] See appendix Figure 2 The lifting base 1 includes a lifting base plate 11, a lifting top plate 12, and two X-shaped supports 13 connected between the lifting base plate 11 and the lifting top plate 12. The two supports 13 are hinged at the middle. One end of the two supports 13 on the same side is respectively hinged to the lifting base plate 11 and the lifting top plate 12 through a rotating shaft 14. The other end of the two supports 13 is respectively hinged to a slider 15. The two sliders 15 are slidably connected to the sliding frames 16 on the lifting base plate 11 and the lifting top plate 12. A lifting adjustment screw 17 is rotatably connected to the sliding frame 16 on the lifting top plate 12. The lifting adjustment screw 17 passes through the corresponding slider 15 and is threadedly connected to the slider 15. An adjustment handwheel 18 is fixed to the end of the lifting adjustment screw 17.

[0028] See appendix Figure 3 Both the X-axis displacement platform 2 and the Y-axis displacement platform 3 are composed of a horizontal displacement base plate 21 and a horizontal displacement top plate 22. The horizontal displacement base plate 21 and the horizontal displacement top plate 22 are slidably connected by a slide structure 23. An adjusting tension spring 24 is connected to the gap between the sliding mating surfaces of the horizontal displacement base plate 21 and the horizontal displacement top plate 22. A stud adjusting bracket 25 is fixed to one side of the horizontal displacement base plate 21. A horizontal adjusting stud 26 is threaded onto the stud adjusting bracket 25. The horizontal adjusting stud 26 is used to push the horizontal displacement top plate 22, thereby realizing the movement of the horizontal displacement top plate 22 relative to the horizontal displacement base plate 21. The axial direction of the horizontal adjusting stud 26 is the same as the axial direction of the slide structure 23 and the adjusting tension spring 24.

[0029] To further optimize the above technical solution, the horizontal adjusting stud 26 of the X-direction displacement platform 2 is arranged perpendicularly to the horizontal adjusting stud 26 of the Y-direction displacement platform 3.

[0030] To further optimize the above technical solution, the horizontal displacement base plate 21 of the X-direction displacement platform 2 is fixed to the top surface of the lifting top plate 12 through the connecting seat 19, the horizontal displacement base plate 21 of the Y-direction displacement platform 3 is fixed to the top surface of the horizontal displacement top plate 22 of the X-direction displacement platform 2, and the horizontal displacement top plate 22 of the Y-direction displacement platform 3 is fixedly connected to the connecting block 5.

[0031] To further optimize the above technical solution, a positioning plate 27 is fixed on one side of the horizontal displacement base plate 21 parallel to the horizontal adjusting stud 26. A strip hole 271 is opened at the corresponding position of the positioning plate 27 and the edge of the horizontal displacement top plate 22. A positioning bolt 28 passes through the strip hole 271. The positioning bolt 28 is threadedly connected to the edge of the horizontal displacement top plate 22 and can press the positioning plate 27.

[0032] See appendix Figure 5 To be continued Figure 7 Multiple sets of corresponding tension spring connection holes 46 are provided between the fine-tuning base plate 41 and the fine-tuning top plate 43. A tension rod 47 is fixed in the tension spring connection hole 46, and the tension rod 47 in the two corresponding upper and lower tension spring connection holes 46 is used to connect auxiliary tension springs.

[0033] To further optimize the above technical solution, a groove 431 for avoiding the adjustment plate 45 is provided on the bottom surface of the fine-tuning top plate 43.

[0034] To further optimize the above technical solution, an auxiliary adjusting bolt 48 is threaded onto the fine-tuning base plate 41. The auxiliary adjusting bolt 48 is located at a corner of the fine-tuning base plate 41 where the fine-tuning stud 44 is not connected.

[0035] See appendix Figure 1 and attached Figure 8 The clamp formed by the SEA probe slot 6 and the encoder reading head 71 is used to hold the circular grating 81 fixed on the standard rod 8.

[0036] In this embodiment, the SEA probe slot 6 is connected to a three-dimensional displacement platform consisting of the X-axis displacement platform 2, the Y-axis displacement platform 3, and the lifting base 1, so as to realize the free adjustment of the position of the SEA probe slot 6; the SEA probe slot 6 is tilted to form a V-shape, which facilitates the insertion and removal of the probe during the experiment without affecting the visual measurement of the contact distance between the standard rod 8 and the SEA probe slot 6.

[0037] The operating principle and method of the integrated adjustable fixture for multi-parameter testing of electric spindles provided in this embodiment are as follows: I. Overall Installation and Initial Positioning of Tooling Base installation: Place the lifting base 1 on the worktable of the electric spindle test platform and level and fix it using the lifting base plate 11 at its bottom.

[0038] Standard bar clamping: Install the standard bar 8 provided by the SEA equipment manufacturer onto the chuck of the spindle under test. Then, fix the encoder's circular grating 81 onto the preset threaded hole of the standard bar 8 through a special bushing to form a test reference.

[0039] Rough alignment of the fixture: Move the entire fixture so that the clamp formed by the SEA probe slot 6 and the encoder reading head 71 is roughly aligned with the standard rod 8 and the circular grating 81 fixed thereon.

[0040] II. Coarse Adjustment in Three-Dimensional Space: Achieving Positioning of SEA Probe Slot 6 During this stage, by operating the lifting base 1, the X-axis displacement platform 2, and the Y-axis displacement platform 3, the three degrees of freedom of the spatial position of the SEA probe slot 6 are coarsely adjusted, so that the SEA probe it carries is initially close to the spherical measurement surface of the standard rod 8.

[0041] Z-axis lifting adjustment: Rotate the adjusting handwheel 18 at the end of the lifting adjusting screw 17. The adjusting handwheel 18 drives the lifting adjusting screw 17 to rotate. Since the screw 17 is threadedly connected to the slider 15 on the lifting top plate 12, the rotational motion is converted into the linear motion of the slider 15 along the sliding frame 16. The movement of the slider 15 will pull the bracket 13 hinged to it, causing the intersection angle of the two X-shaped brackets 13 to change, thereby smoothly lifting or lowering the lifting top plate 12, and ultimately driving all platforms above it and the SEA probe slot 6 to achieve Z-axis height adjustment. After the adjustment is completed, the height of the SEA probe slot 6 is initially set.

[0042] X / Y Horizontal Adjustment: Rotate the horizontal adjustment studs 26 on the X-axis displacement platform 2 and the Y-axis displacement platform 3 respectively. See attached diagram for an example of the X-axis displacement platform 2. Figure 3 When the horizontal adjusting stud 26 is rotated, its axial displacement, due to its threaded connection with the stud adjusting bracket 25 fixed on the horizontal displacement base plate 21, will push the upper horizontal displacement top plate 22. The horizontal displacement top plate 22 slides relative to the horizontal displacement base plate 21 through the slide structure 23, realizing X-axis movement. During this process, the adjusting spring 24 connected between the horizontal displacement base plate 21 and the top plate 22 always provides a reverse tension to eliminate transmission gaps and ensure smooth and wobbly movement. The Y-axis displacement platform 3 works on the same principle, with the axis of its horizontal adjusting stud 26 perpendicular to the X-axis platform, thus realizing Y-axis movement. After coarse adjustment, the positioning bolt 28 can be tightened. The positioning bolt 28 passes through the strip hole 271 on the positioning plate 27 and is threadedly connected to the side of the horizontal displacement top plate 22, pressing the positioning plate 27, thereby locking the relative position of the horizontal displacement top plate 22 and the base plate 21 to prevent displacement during testing. By operating two platforms, the SEA probe slot 6 can be precisely positioned in two degrees of freedom in the horizontal plane.

[0043] III. Fine Calibration of Encoder Reading Head 71 After the SEA probe slot 6 is coarsely positioned, the encoder reading head 71 fixed on the reading head mounting plate 7 needs to be finely calibrated to ensure that it is precisely parallel and aligned with the circular grating 81 on the standard bar 8 and meets the required gap.

[0044] Bidirectional tilt fine-tuning: Simultaneously or separately rotate the adjusting disc 45 on the two fine-tuning studs 44 located diagonally opposite each other on the fine-tuning base plate 41 in the fine-tuning module 4. The fine-tuning studs 44 are threadedly connected to the fine-tuning base plate 41. When rotating the adjusting disc 45, the ends of the studs 44 push or release the upper fine-tuning top plate 43. Since the fine-tuning top plate 43 is elastically connected to the fine-tuning base plate 41 through a leaf spring 42, the leaf spring 42 provides a return tendency while allowing the top plate 43 to tilt slightly. By differentially adjusting the two diagonally arranged fine-tuning studs 44, i.e., one screws in while the other screws out, the tilt angle of the fine-tuning top plate 43 around the X-axis or Y-axis can be precisely controlled. The groove 431 at the bottom of the fine-tuning top plate 43 provides rotation space for the adjusting disc 45. In complex cases, auxiliary pushing can be achieved by using the auxiliary adjusting bolt 48 located at the other corner, or by adding an auxiliary tension spring to the pull rod 47 in the corresponding tension spring connection hole 46 to change the elastic force distribution of the system, making the adjustment more precise and stable. The tilt of the fine-tuning top plate 43 is directly transmitted to the reading head mounting plate 7 and the encoder reading head 71 fixed thereon, thereby achieving micron-level fine calibration of the spatial attitude of the reading head 71 and ensuring that it is strictly parallel to the reading surface of the circular grating 81. After the tilt calibration is completed, the X-axis 2, Y-axis displacement platform 3 or fine-tuning module 4 can be used again in combination to make final fine adjustments to the air gap or radial alignment between the reading head 71 and the circular grating 81.

[0045] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0046] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An integrated adjustable fixture for multi-parameter testing of an electric spindle, characterized in that, include: Lifting base (1); An X-axis displacement platform (2) and a Y-axis displacement platform (3) are stacked sequentially on the top surface of the lifting base (1). A connecting block (5) is fixed on the top surface of the Y-axis displacement platform (3), and a V-shaped SEA probe groove (6) is fixed on the side wall of the connecting block (5). The X-axis displacement platform (2), the Y-axis displacement platform (3), and the lifting base (1) can work together to realize the movement of the SEA probe groove (6) in three-dimensional space. The fine-tuning module (4) includes a fine-tuning base plate (41) fixed on the top surface of the connecting block (5). The top surface of the fine-tuning base plate (41) is connected to a fine-tuning top plate (43) via a leaf spring (42). The fine-tuning base plate (41) is connected to fine-tuning studs (44) by threads on its diagonals. The fine-tuning studs (44) have an adjustment disc (45) with an outer diameter that extends beyond the outer edges of the fine-tuning base plate (41) and the fine-tuning top plate (43). The top surface of the fine-tuning top plate (43) is fixed with a reading head mounting plate (7). The reading head mounting plate (7) is fixed with an encoder reading head (71) corresponding to the SEA probe slot (6).

2. The integrated adjustable fixture for multi-parameter testing of an electric spindle according to claim 1, characterized in that, The lifting base (1) includes a lifting base plate (11), a lifting top plate (12), and two X-shaped supports (13) connected between the lifting base plate (11) and the lifting top plate (12). The two supports (13) are hinged at the middle. One end of the two supports (13) on the same side is hinged to the lifting base plate (11) and the lifting top plate (12) respectively through a rotating shaft (14). The other end of the two supports (13) is hinged to a slider (15). The two sliders (15) are slidably connected to the sliding frame (16) on the lifting base plate (11) and the lifting top plate (12) respectively. A lifting adjustment screw (17) is rotatably connected to the sliding frame (16) on the lifting top plate (12). The lifting adjustment screw (17) passes through the corresponding slider (15) and is threadedly connected to the slider (15). An adjustment handwheel (18) is fixed at the end of the lifting adjustment screw (17).

3. The integrated adjustable fixture for multi-parameter testing of an electric spindle according to claim 2, characterized in that, The X-direction displacement platform (2) and the Y-direction displacement platform (3) are both composed of a horizontal displacement base plate (21) and a horizontal displacement top plate (22). The horizontal displacement base plate (21) and the horizontal displacement top plate (22) are slidably connected by a slide structure (23). An adjusting spring (24) is connected to the gap between the sliding mating surfaces of the horizontal displacement base plate (21) and the horizontal displacement top plate (22). A stud adjusting bracket (25) is fixed on one side of the horizontal displacement base plate (21). A horizontal adjusting stud (26) is threaded onto the stud adjusting bracket (25). The horizontal adjusting stud (26) is used to push the horizontal displacement top plate (22), thereby realizing the movement of the horizontal displacement top plate (22) relative to the horizontal displacement base plate (21). The axial direction of the horizontal adjusting stud (26) is the same as the axial direction of the slide structure (23) and the adjusting spring (24).

4. The integrated adjustable fixture for multi-parameter testing of an electric spindle according to claim 3, characterized in that, The horizontal adjusting stud (26) of the X-direction displacement platform (2) is arranged perpendicularly to the horizontal adjusting stud (26) of the Y-direction displacement platform (3).

5. The integrated adjustable fixture for multi-parameter testing of an electric spindle according to claim 4, characterized in that, The horizontal displacement base plate (21) of the X-direction displacement platform (2) is fixed to the top surface of the lifting top plate (12) by the connecting seat (19), the horizontal displacement base plate (21) of the Y-direction displacement platform (3) is fixed to the top surface of the horizontal displacement top plate (22) of the X-direction displacement platform (2), and the horizontal displacement top plate (22) of the Y-direction displacement platform (3) is fixedly connected to the connecting block (5).

6. The integrated adjustable fixture for multi-parameter testing of an electric spindle according to claim 5, characterized in that, A positioning plate (27) is fixed on one side of the horizontal displacement base plate (21) parallel to the horizontal adjusting stud (26). A strip hole (271) is opened at the corresponding position of the positioning plate (27) and the edge of the horizontal displacement top plate (22). A positioning bolt (28) passes through the strip hole (271). The positioning bolt (28) is threaded to the edge of the horizontal displacement top plate (22) and can press the positioning plate (27).

7. The integrated adjustable fixture for multi-parameter testing of an electric spindle according to claim 1, characterized in that, Multiple sets of corresponding tension spring connection holes (46) are provided between the fine-tuning base plate (41) and the fine-tuning top plate (43). A pull rod (47) is fixed in the tension spring connection hole (46). The pull rod (47) in the two corresponding tension spring connection holes (46) are used to connect auxiliary tension springs.

8. The integrated adjustable fixture for multi-parameter testing of an electric spindle according to claim 1, characterized in that, The bottom surface of the fine-tuning top plate (43) is provided with a groove (431) for avoiding the adjustment plate (45).

9. The integrated adjustable tooling for multi-parameter testing of an electric spindle according to claim 1, characterized in that, An auxiliary adjusting bolt (48) is threaded onto the fine-tuning base plate (41), and the auxiliary adjusting bolt (48) is located at a corner of the fine-tuning base plate (41) where the fine-tuning stud (44) is not connected.

10. The integrated adjustable fixture for multi-parameter testing of an electric spindle according to claim 1, characterized in that, The clamp formed by the SEA probe slot (6) and the encoder reading head (71) is used to hold the circular grating (81) fixed on the standard rod (8).

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