Main shaft assembly and machining center

Abstract

The utility model provides a main shaft assembly which comprises a main shaft, an installation frame, a positioning probe and a cleaning mechanism, the main shaft and the positioning probe are both arranged on the installation frame, the positioning probe is arranged on the installation frame in a vertically movable mode, and the cleaning mechanism and the positioning probe are arranged correspondingly. A limiting block used for limiting the position of the positioning probe is arranged on the mounting frame, the limiting block is provided with a conveying channel used for distributing gas and / or distributing liquid, and at least one output end of the conveying channel is communicated with the input end of the cleaning mechanism. The utility model further provides a machining center. The main shaft assembly provided by the technical scheme of the utility model can ensure the cleanness of the positioning probe.

Description

Technical Field

[0001] The utility model relates to the technical field of processing equipment, in particular to a spindle assembly and a processing center. Background Art

[0002] Existing machining centers are generally equipped with probe devices, which are devices that assist machining centers in positioning and centering the workpiece. The probe device is generally installed on the left and right sides or in front of the machining center spindle, and moves with the head components of the machining center. Before machining, the probe of the probe device descends, and in manual or automatic mode, it touches the four points on the left, right, front and back of the workpiece, generating an electrical signal as an instruction to the CNC system to perform coordinate parameter calculations, realize the centering of the workpiece size and the positioning of the workpiece, and then start the machining program. After the probe has detected the four parameter points, the probe device raises the probe to prevent interference between the probe and the workpiece during machining, resulting in collision and damage.

[0003] For example, see Figure 1 In the patent authorization announcement number CN 220516235 U, a spindle probe structure and a CNC machine tool are disclosed, including a spindle probe structure, the spindle probe structure including a mounting seat 1 and a driving member 2 and a probe assembly 3 mounted on the mounting seat 1. The spindle probe structure is installed next to a machining spindle 100 on the CNC machine tool through the mounting seat 1, and the driving member 2 is used to drive the probe assembly 3 to move along the Z-axis direction.

[0004] However, the above patent has the following problem: when the workpiece is processed in the machining center, the flying chips generated may stick to the probe or the limit position of the probe device. If they are not cleaned in time, the next time the inspection is performed, the inspection data will be inaccurate due to the flying chips sticking to the probe, thereby reducing the machining accuracy of the machining center.

[0005] Therefore, how to keep the probe device clean is an urgent problem to be solved. Utility Model Content

[0006] The utility model provides a spindle assembly and a machining center, which can ensure the cleanliness of a positioning probe.

[0007] The utility model provides a spindle assembly, comprising a spindle, a mounting frame, a positioning probe and a cleaning mechanism, wherein the spindle and the positioning probe are both arranged on the mounting frame, the positioning probe can be arranged on the mounting frame movably up and down, and the cleaning mechanism is arranged corresponding to the positioning probe;

[0008] A limit block for limiting the position of the positioning probe is provided on the mounting frame, and the limit block has a delivery channel for diverting gas and / or diverting liquid, and at least one output end of the delivery channel is connected to the input end of the cleaning mechanism.

[0009] In some feasible embodiments, the cleaning mechanism forms at least a first cleaning port and a second cleaning port located at different heights by setting branches, and the positioning probe can reciprocate between a first position and a second position along a straight line relative to the mounting frame, and one of the first cleaning port and the second cleaning port is used to clean the positioning probe in the first position, and the other of the first cleaning port and the second cleaning port is used to clean the positioning probe in the second position.

[0010] In some feasible embodiments, the input end of the cleaning mechanism is connected to the limit block via a spherical joint, and the cleaning mechanism can rotate relative to the limit block at a preset angle via the spherical joint.

[0011] In some feasible embodiments, the cleaning mechanism includes a transmission tube and a first cleaning head and a second cleaning head connected to different positions of the transmission tube, the end of the first cleaning head is a first cleaning port, the end of the second cleaning head is a second cleaning port, and the height of the first cleaning head is different from the height of the second cleaning head. The transmission tube itself can change the angle between the first cleaning head and the positioning probe and the angle between the second cleaning head and the positioning probe by bending.

[0012] In some feasible embodiments, a cylinder / hydraulic cylinder structure is further included for driving the positioning probe to move, and the delivery channel also includes an output end connected to the input end of the cylinder / hydraulic cylinder structure, so that the cleaning mechanism and the cylinder / hydraulic cylinder structure share the same air source or the same hydraulic source through the delivery channel. In some feasible embodiments, a limiting mechanism is provided on the mounting frame for limiting the high side end position or the low side end position of the reciprocating motion of the positioning probe.

[0013] In some feasible embodiments, an adapter plate is further included, and the positioning probe, the cleaning mechanism, and the limiting mechanism are all arranged on the mounting frame through the adapter plate.

[0014] In some feasible embodiments, the limit mechanism includes a proximity switch and a position matching piece, wherein the proximity switch and the position matching piece are used to sense whether the positioning probe is in the first position of the mounting frame, and one of the proximity switch and the position matching piece is arranged on the top of the adapter plate, and the other is arranged on the positioning probe.

[0015] In some feasible embodiments, the positioning probe is provided with a limit fitting piece that cooperates with the limit block. The limit block is arranged at the bottom of the adapter plate. The limit block cooperates with the limit fitting piece to limit the lowest position of the reciprocating motion of the positioning probe relative to the adapter plate.

[0016] The utility model also provides a machining center, comprising a base, a column arranged on the base, a crossbeam arranged on the column and the above-mentioned spindle assembly, wherein a mounting frame of the spindle assembly is arranged on the crossbeam.

[0017] The above-mentioned spindle assembly is achieved by arranging the spindle and the positioning probe on a mounting frame, the positioning probe can be movably arranged on the mounting frame up and down, and the cleaning mechanism is arranged corresponding to the positioning probe; a limit block for limiting the position of the positioning probe is provided on the mounting frame, the limit block has a conveying channel for diverting gas and / or diverting liquid, at least one output end of the conveying channel is connected to the input end of the cleaning mechanism, so that the cleaning mechanism can ensure the cleaning of the positioning probe, thereby improving the machining accuracy of the machining center, and since there is no need to add a diverter block, the integration of the spindle assembly is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model, and for ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without creative work.

[0019] Figure 1 The present invention provides a schematic diagram of a spindle probe structure and a CNC machine tool according to the prior art.

[0020] Figure 2 A three-dimensional diagram of a spindle assembly provided in accordance with an embodiment of the present utility model.

[0021] Figure 3 A schematic diagram of a mounting frame and a cleaning mechanism in a spindle assembly provided in one embodiment of the utility model.

[0022] Figure 4 An exploded view of a mounting frame and a cleaning mechanism in a spindle assembly provided in one embodiment of the utility model.

[0023] Component Symbols

[0024] 100, spindle; 200, mounting bracket; 300, positioning probe; 310, position-limiting fitting; 311, first notch; 400, cleaning mechanism; 401, first cleaning port; 402, second cleaning port; 410, transmission tube; 420, first cleaning head; 430, second cleaning head; 500, position-limiting block; 501, second notch; 510, transmission channel; 700, position-limiting mechanism; 710, proximity switch; 720, position-limiting fitting; 800, adapter plate; 1000, cylinder / hydraulic cylinder structure; 600, spherical joint; P1, first position; P2, second position; 1200, slide rail; 1300, slider; 1400, mounting seat.

[0025] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0026] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0027] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0028] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] In order to make the content of the utility model more clearly and more accurately understood, it will now be described in detail with reference to the accompanying drawings. The accompanying drawings of the specification illustrate examples of embodiments of the utility model, wherein the same reference numerals represent the same elements. It is understood that the scales shown in the accompanying drawings of the specification are not the scales of the actual implementation of the utility model, which are only for the purpose of illustration and are not drawn according to the original size.

[0030] Please see Figure 2 and 3 The utility model provides a spindle assembly, including a spindle 100, a mounting frame 200, a positioning probe 300 and a cleaning mechanism 400.

[0031] Please see Figure 2 The spindle 100 can be equipped with a tool to process a workpiece, and the workpiece can be a glass or metal part.

[0032] Please see Figure 2The mounting frame 200 is used for mounting the positioning probe 300 and the cleaning mechanism 400. In this embodiment, the mounting frame 200 is in the shape of a plate, and the positioning probe 300, the spindle 100 and the cleaning mechanism 400 are all mounted on one side of the mounting frame 200. The other side of the mounting frame 200 can fit the crossbeam of the machining center and move relative to the crossbeam. For example, the other side of the mounting frame 200 can be slidably connected to the crossbeam through a guide rail, so as to ensure the balance of the two sides of the mounting frame 200 and make full use of the space on the front and back sides of the mounting frame 200.

[0033] Please see Figure 2 The positioning probe 300 is used to locate the position of the workpiece. Specifically, before processing, the probe of the positioning probe 300 descends, and in manual or automatic mode, touches the four points of the left, right, front and back of the workpiece, and generates an electrical signal as an instruction to the numerical control system of the machining center to perform coordinate parameter calculations, so as to achieve the centering and positioning of the workpiece size, and then start the processing program. In this embodiment, the number of the positioning probes 300 is at least two, and at least two positioning probes 300 are located on both sides of the spindle 100. The number of the cleaning mechanisms 400 is consistent with the number of the positioning probes 300, and each cleaning mechanism 400 is arranged behind the positioning probe 300 and between the positioning probe 300 and the mounting frame 200. By setting at least two positioning probes 300, if only one positioning probe 300 is used, then the positioning probe 300 is offset on one side of the spindle 100, and the workpiece on the other side of the spindle 100 may not be detected, resulting in the processing range being unable to be covered by the detection range. By setting at least two positioning probes 300, at least two positioning probes 300 are set on both sides of the spindle 100, then the space below both sides of the spindle 100 can be detected, thereby improving the detection range and ensuring the detection accuracy.

[0034] Please see Figure 3 and 4The spindle 100 and the positioning probe 300 are both arranged on the mounting frame 200. The positioning probe 300 can be arranged on the mounting frame 200 so as to be movable up and down. Specifically, the positioning probe 300 can reciprocate relative to the mounting frame 200 along the axial direction parallel to the spindle 100, so that the positioning probe 300 can flexibly detect different positions of the workpiece on the machining table of the machining center. For example, the positioning probe 300 reciprocates in a straight line relative to the mounting frame 200 through the slide rail 1200 and the slider 1300. In the present embodiment, the slide rail 1200 is fixedly mounted on the mounting frame 200 through the adapter plate 800. The width of the adapter plate 800 is slightly larger than the width of the slide rail 1200. The height of the adapter plate 800 is slightly larger than the height of the slide rail 1200. The width of the adapter plate 800 is 1 / 5-1 / 4 of the width of the mounting frame 200. The height of the adapter plate 800 is 1 / 2-2 / 3 of the height of the mounting frame 200. The cleaning mechanism 400 is also mounted on the mounting frame 200, which makes it convenient to assemble the cleaning mechanism 400, the positioning probe 300, and the slide rail 1200 onto the adapter plate 800.

[0035] Please see Figure 2 , 3 4. More specifically, a stopper 500 is provided on the mounting frame 200 for limiting the position of the positioning probe 300. The stopper 500 is used to limit the lower side end or the upper side end of the positioning probe 300 for reciprocating motion. In this embodiment, the stopper 500 limits the position of the lower side end of the positioning probe 300 for reciprocating motion. The stopper 500 has a delivery channel 510 for diverting gas and / or diverting liquid, and at least one output end of the delivery channel 510 is connected to the input end of the cleaning mechanism 400. In some other embodiments, the limit block 500 can also be the position of the high side end that limits the reciprocating motion of the positioning probe 300; in this embodiment, the spindle assembly also includes a cylinder / hydraulic cylinder structure 1000 for driving the positioning probe 300 to move, and the delivery channel 510 also includes an output end connected to the input end of the cylinder / hydraulic cylinder structure 1000, that is, the delivery channel 510 has an input end and two output ends connected to the input end at the same time, and the two output ends are respectively connected to the cleaning mechanism 400 and the cylinder / hydraulic cylinder structure 1000, so that the cleaning mechanism 400 and the cylinder / hydraulic cylinder structure 1000 share the same air source or the same hydraulic source through the delivery channel 510, so that the limit block 500 can have a diversion effect, reduce the structure of the diversion block, and improve the integration of the spindle assembly.

[0036] The cleaning mechanism 400 is arranged corresponding to the positioning probe 300. The cleaning mechanism 400 forms at least a first cleaning port 401 and a second cleaning port 402 at different heights by setting branches. The positioning probe 300 can reciprocate between the first position P1 and the second position P2 along a straight line relative to the mounting frame 200. One of the first cleaning port 401 and the second cleaning port 402 is used to clean the positioning probe 300 at the first position P1, and the other of the first cleaning port 401 and the second cleaning port 402 is used to clean the positioning probe 300 at the second position P2. By setting the first cleaning port 401 and the second cleaning port 402, the positioning probe 300 at the first position P1 and the positioning probe 300 at the second position P2 can be cleaned without moving the cleaning mechanism 400. The second cleaning port 402 is added, and the driving mechanism for driving the cleaning mechanism 400 to move is saved, so that it is more convenient to clean the positioning probe 300.

[0037] More specifically, the cleaning mechanism 400 includes a transmission tube 410 and a first cleaning head 420 and a second cleaning head 430 connected to different positions of the transmission tube 410. The transmission tube 410 includes two sections, and the two sections of the transmission tube are connected by a tee, so that a relatively low second cleaning head 430 can be installed at the end of the transmission tube 410 connected to one output port of the tee, and a higher first cleaning head 420 is set at the other output port of the tee. The end of the first cleaning head 420 is a first cleaning port 401, and the end of the second cleaning head 430 is a second cleaning port 402. The height of the first cleaning head 420 is different from that of the second cleaning head 430. The transmission tube 410 itself can change the angle between the first cleaning head 420 and the positioning probe 300 and the angle between the second cleaning head 430 and the positioning probe 300 by bending, so that the operator can adjust the angle and distance between the first cleaning port 401 and the second cleaning port 402 and the positioning probe 300 by bending the transmission tube 410.

[0038] Please see Figure 4 The input end of the cleaning mechanism 400 is connected to the limit block 500 through the ball joint 600, and the cleaning mechanism 400 can rotate relative to the limit block 500 by a preset angle through the ball joint 600. By providing the ball joint 600, the cleaning mechanism 400 can rotate relative to the positioning probe 300 in a larger range, thereby facilitating a large adjustment of the direction and distance of the cleaning mechanism 400 relative to the positioning probe 300.

[0039] Please see Figure 2 , 3And 4, the cylinder / hydraulic cylinder structure 1000 serves as a power source. Driven by the cylinder / hydraulic cylinder structure 1000, the positioning probe 300 reciprocates along a straight line along the slide rail 1200 relative to the mounting frame 200. The cylinder / hydraulic cylinder structure 1000 is also installed on the mounting frame 200 through the adapter plate 800. The telescopic end of the cylinder / hydraulic cylinder structure 1000 is connected to the positioning probe 300 through the limit fitting 310 and the mounting seat 1400. The top of the mounting seat 1400 is used for detachable connection with the limit fitting 310. The positioning probe 300 is provided with a limit fitting 310 that is limited by a limit block 500. The limit block 500 is arranged at the bottom of the adapter plate 800 or at the top of the adapter plate 800. The limit block 500 is limited by the limit fitting 310 to limit the lowest position or the highest position of the reciprocating motion of the positioning probe 300 relative to the adapter plate 800. For example, the limit block 500 is arranged at the bottom of the adapter plate 800, and the limit block 500 is used to limit the lowest position of the reciprocating motion of the positioning probe 300 relative to the adapter plate 800. The top of the mounting seat 1400 is used to be detachably connected to the limit fitting 310 by bolts, and the bottom of the mounting seat 1400 is used to install the positioning probe 300. By setting the mounting seat 1400, the positioning probe 300 can be conveniently installed. The fixed end of the cylinder / hydraulic cylinder structure 1000 is fixedly installed on the top of the adapter plate 800, and the positioning probe 300, the cleaning mechanism 400, and the limiting mechanism 700 are all arranged on the mounting frame 200 through the adapter plate 800, so that it is convenient to first assemble the positioning probe 300, the cleaning mechanism 400 and the limiting mechanism 700 on the adapter plate 800, and then install the adapter plate 800 on the mounting frame 200, so as to facilitate the assembly of the positioning probe 300, the cleaning mechanism 400 and the limiting mechanism 700 on the mounting frame 200.

[0040] Please see Figure 4 For example, a first notch 311 is provided at the lower part of the limiting fitting 310 near the side of the limiting block 500, and a second notch 501 is provided at the top of the limiting block 500 and near one end of the limiting fitting 310. The bottom wall of the limiting fitting 310 at the first notch 311 abuts against the top wall of the limiting block 500 at the second notch 501. By adjusting the vertical depth of the first notch 311 and the second notch 501 and the longitudinal width along the vertical adapter plate 800, the vertical overlap depth and the horizontal contact area of ​​the limiting block 500 and the limiting fitting 310 can be adjusted, thereby adjusting the second position P2 of the positioning probe 300 relative to the mounting frame 200, and the limiting effect of the limiting block 500 and the limiting fitting 310 can be improved by increasing the contact area between the limiting block 500 and the limiting fitting 310.

[0041] Please see Figure 3 and 4, the positioning probe 300 can reciprocate between the first position P1 and the second position P2 along a straight line relative to the mounting frame 200. In order to limit the stroke of the positioning probe 300 to reciprocate along a straight line, a limit block 500 for limiting the reciprocating low side end position or high side end position of the positioning probe 300 is provided on the mounting frame 200. When the positioning probe 300 moves to the second position P2, the limit fitting 310 abuts against the limit block 500 in the vertical direction, thereby achieving the lowest position of limiting the downward movement of the positioning probe 300.

[0042] A limiting mechanism 700 is provided on the mounting frame 200 for limiting the high side end position or the low side end position of the reciprocating motion of the positioning probe 300. For example, the limiting mechanism 700 includes a proximity switch 710 and a position matching member 720. The proximity switch 710 and the position matching member 720 are used for sensing whether the positioning probe 300 is in the first position P1 of the mounting frame 200 or in the second position P2 of the mounting frame 200. One of the proximity switch 710 and the position matching member 720 is fixedly arranged on the top of the adapter plate 800 or at the bottom of the adapter plate 800, and the other is arranged on the positioning probe 300 and moves with the movement of the positioning probe 300. Therefore, when the positioning probe 300 is raised to the first position P1, the positioning matching of the proximity switch 710 and the position matching member 720 determines that the positioning probe 300 is actually raised to the first position P1.

[0043] Please see Figure 4 , the spindle assembly also includes a limiting mechanism 700. In this embodiment, the limiting mechanism 700 is arranged at the top of the adapter plate 800 to limit the positioning probe 300 to the first position P1 of the adapter plate 800, and the limiting block 500 is arranged at the bottom of the mounting frame 200 to limit the positioning probe 300 to the second position P2 of the adapter plate 800, wherein the first position P1 is the highest position and the second position P2 is the lowest position. It can be understood that the limiting mechanism 700 can be realized by electronic components or by a physical limiting structure of an entity. For example, in this embodiment, the limiting mechanism 700 is realized by electronic components. In some other embodiments, the limiting mechanism 700 is arranged at the bottom of the adapter plate 800 to limit the positioning probe 300 to the second position P2 of the adapter plate 800, and the limiting block 500 is arranged at the top of the adapter plate 800 to limit the positioning probe 300 to the first position P1 of the adapter plate 800, and the limiting mechanism 700 can also be realized by a physical limiting structure of an entity.

[0044] Please see Figure 3 and 4Specifically, the position limiting mechanism 700 includes a proximity switch 710 and a position matching member 720, wherein the proximity switch 710 and the position matching member 720 are used to sense whether the positioning probe 300 is in the first position P1 of the mounting frame 200, and one of the proximity switch 710 and the position matching member 720 is disposed on the top of the mounting frame 200, and the other is disposed on the positioning probe 300. By disposing the proximity switch 710, the position of the positioning probe 300 relative to the mounting frame 200 can be accurately known.

[0045] Please see Figure 3 and 4 The cleaning mechanism 400 can move with the movement of the positioning probe 300 or the cleaning mechanism 400 can be fixed relative to the mounting frame 200, and the cleaning mechanism 400 is used to keep the positioning probe 300 clean. In this embodiment, the cleaning mechanism 400 can remove the flying debris on the positioning probe 300 by blowing or sucking air, that is, the cleaning mechanism 400 includes a positive pressure air source or a negative pressure air source, so that the cleaning mechanism 400 can be kept clean.

[0046] The above-mentioned spindle assembly is achieved by arranging the spindle 100 and the positioning probe 300 on the mounting frame 200, the positioning probe 300 can be movably arranged on the mounting frame 200 up and down, and the cleaning mechanism 400 is arranged corresponding to the positioning probe 300; a limit block 500 for limiting the position of the positioning probe 300 is provided on the mounting frame 200, and the limit block 500 has a conveying channel 510 for diverting gas and / or diverting liquid, and at least one output end of the conveying channel 510 is connected to the input end of the cleaning mechanism 400, so that the cleaning of the positioning probe 300 can be ensured through the cleaning mechanism 400, thereby improving the machining accuracy of the machining center.

[0047] The utility model also provides a machining center, including a base, a column arranged on the base, a crossbeam arranged on the column and the above-mentioned spindle assembly, wherein the mounting frame 200 of the spindle assembly is arranged on the crossbeam.

[0048] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

[0049] The above examples are only preferred embodiments of the present invention, and certainly cannot be used to limit the scope of the present invention. Therefore, equivalent changes made according to the claims of the present invention still fall within the scope covered by the present invention.

Claims

1. A spindle assembly, characterized in that: The invention comprises a main shaft (100), a mounting frame (200), a positioning probe (300) and a cleaning mechanism (400), wherein the main shaft (100) and the positioning probe (300) are both arranged on the mounting frame (200), the positioning probe (300) is arranged on the mounting frame (200) so as to be movable up and down, and the cleaning mechanism (400) is arranged corresponding to the positioning probe (300); A limit block (500) for limiting the position of the positioning probe (300) is provided on the mounting frame (200); the limit block (500) has a delivery channel (510) for diverting gas and / or diverting liquid; at least one output end of the delivery channel (510) is connected to an input end of the cleaning mechanism (400).

2. The spindle assembly according to claim 1, characterized in that: The cleaning mechanism (400) is provided with branches to form at least a first cleaning port (401) and a second cleaning port (402) located at different heights. The positioning probe (300) can reciprocate along a straight line between a first position (P1) and a second position (P2) relative to the mounting frame (200). One of the first cleaning port (401) and the second cleaning port (402) is used to clean the positioning probe (300) at the first position (P1), and the other of the first cleaning port (401) and the second cleaning port (402) is used to clean the positioning probe (300) at the second position (P2).

3. The spindle assembly according to claim 2, characterized in that: The input end of the cleaning mechanism (400) is connected to the limit block (500) via a spherical joint (600), and the cleaning mechanism (400) can be rotated at a preset angle relative to the limit block (500) via the spherical joint (600).

4. The spindle assembly according to claim 2, characterized in that: The cleaning mechanism (400) comprises a transmission tube (410) and a first cleaning head (420) and a second cleaning head (430) connected to different positions of the transmission tube (410); the end of the first cleaning head (420) is a first cleaning port (401), the end of the second cleaning head (430) is a second cleaning port (402), and the height of the first cleaning head (420) is different from the height of the second cleaning head (430); the transmission tube (410) itself can change the angle between the first cleaning head (420) and the positioning probe (300) and the angle between the second cleaning head (430) and the positioning probe (300) by bending.

5. The spindle assembly according to claim 1, characterized in that: It also includes a cylinder / hydraulic cylinder structure (1000) for driving the positioning probe (300) to move, and the delivery channel (510) also includes an output end connected to the input end of the cylinder / hydraulic cylinder, so that the cleaning mechanism (400) and the cylinder / hydraulic cylinder structure (1000) share the same air source or the same hydraulic source through the delivery channel (510).

6. The spindle assembly according to any one of claims 1 to 5, characterized in that: A limiting mechanism (700) for limiting the high side end position or the low side end position of the reciprocating motion of the positioning probe (300) is provided on the mounting frame (200).

7. The spindle assembly according to claim 6, characterized in that: It also includes an adapter plate (800), and the positioning probe (300), the cleaning mechanism (400), and the limiting mechanism (700) are all arranged on the mounting frame (200) via the adapter plate (800).

8. The spindle assembly according to claim 7, characterized in that: The limiting mechanism (700) comprises a proximity switch (710) and a position matching member (720), wherein the proximity switch (710) and the position matching member (720) are used to sense whether the positioning probe (300) is in a first position (P1) of the mounting frame (200) or in a second position (P2) of the mounting frame (200), and one of the proximity switch (710) and the position matching member (720) is arranged on the top of the adapter plate (800) or on the bottom of the adapter plate (800), and the other is arranged on the positioning probe (300).

9. The spindle assembly according to claim 7, characterized in that: The positioning probe (300) is provided with a limiting fitting piece (310) that is limitedly matched with the limiting block (500); the limiting block (500) is arranged at the bottom of the adapter plate (800) or at the top of the adapter plate (800); the limiting block (500) and the limiting fitting piece (310) are limitedly matched to limit the lowest position or the highest position of the reciprocating motion of the positioning probe (300) relative to the adapter plate (800).

10. A machining center, characterized in that: It comprises a base, a column arranged on the base, a crossbeam arranged on the column, and a spindle assembly as claimed in any one of claims 1 to 9, wherein a mounting frame (200) of the spindle assembly is arranged on the crossbeam.

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