Main shaft tool loosening and clamping position detection mechanism and pull rod dismounting method thereof

Abstract

The invention discloses a spindle tool loosening and clamping position detection mechanism and a pull rod dismounting method thereof, the spindle tool loosening and clamping position detection mechanism comprises a shaft center, a shell, an induction ring, a plurality of connecting pieces and a pull rod, the shaft center is provided with an avoiding hole and a center hole extending in the axial direction, and the avoiding hole extends to the center hole from the radial outer side of the shaft center and extends by a preset distance in the axial direction. The shell covers the axis, and the front end of the shell is provided with a cutter loosening proximity switch and a cutter clamping proximity switch. The induction ring is located in the shell and annularly sleeves the axis. The outer end of the connecting piece is connected with the induction ring, and the inner end of the connecting piece penetrates through the receding holes to enter the center hole. The pull rod is located in the center hole and connected with the inner end of the connecting piece. A pull claw assembly is installed at one end of the pull rod and used for clamping a cutter. The other end of the pull rod is connected with a power piece used for driving the pull rod to drive the induction ring to move between the cutter loosening position and the cutter clamping position. And at the cutter loosening position, the induction ring is aligned with the cutter loosening proximity switch, and the pulling claw assembly loosens the cutter. And at the cutter clamping position, the induction ring is aligned with the cutter clamping proximity switch, and the pulling claw assembly clamps the cutter.

Description

Technical Field

[0001] This invention relates to the field of CNC machine tool technology, and in particular to a spindle tool release position detection mechanism and its tie rod disassembly method. Background Technology

[0002] Currently, the tool release and clamping position detection structure in electric spindles is located at the rear end of the spindle. It typically includes a spindle core, a drawbar, a tool-removing cylinder, and proximity switches and proximity switch induction discs located on the drawbar and the tool-removing cylinder, respectively. During tool changing in the electric spindle, the drawbar, driven by the tool-removing cylinder, causes the proximity switch induction disc to move axially within the spindle core's inner hole. At this time, the tool clamping state can be divided into three types: tool release, tool clamping, and no tool. Each of these states requires a corresponding sensing device, i.e., a proximity switch, for detection. The proximity switch detects the signal from the proximity switch induction disc and feeds it back to the tool magazine. Upon receiving the signal, the tool magazine completes the tool changing operation.

[0003] When the spindle is installed on the machine tool, only the front end of the spindle is exposed. If the spindle becomes loose or the tool clamping position is abnormal, the machine tool sheet metal needs to be disassembled and the proximity switch at the rear end of the spindle needs to be adjusted or replaced. This process is complicated and tedious. Summary of the Invention

[0004] The purpose of this invention is to provide a spindle clamping tool position detection mechanism and its tie rod disassembly method to solve the problems of the prior art.

[0005] To solve the above-mentioned technical problems, embodiments of the present invention provide a spindle tool release / unlocking position detection mechanism, comprising:

[0006] The shaft has a clearance hole and a central hole extending axially. The clearance hole extends radially outward from the shaft to the central hole and extends axially by a predetermined distance.

[0007] The housing covers the shaft and has a knife release proximity switch and a knife clamping proximity switch at its front end;

[0008] A sensing ring, wherein the sensing ring is located inside the housing and is sleeved around the shaft;

[0009] A connector, the outer end of which is connected to the sensing ring, and the inner end of which passes through multiple clearance holes and enters the central hole;

[0010] A pull rod is located in the central hole and connected to the inner end of the connector; a claw assembly is installed at one end of the pull rod for clamping the tool; a power component is connected to the other end of the pull rod for driving the pull rod to move the sensing ring between the tool release position and the tool clamping position.

[0011] At the tool release position, the sensing ring aligns with the tool release proximity switch, and the claw assembly releases the tool;

[0012] At the tool clamping position, the sensing ring is aligned with the tool clamping proximity switch, and the pull claw assembly clamps the tool.

[0013] In one embodiment, the plurality of the clearance holes are arranged circumferentially around the axis;

[0014] The outer ends of the plurality of connectors are respectively connected to the sensing ring, and the inner ends are respectively connected to the pull rod through the plurality of clearance holes.

[0015] In one embodiment, the connector is a locking screw;

[0016] The sensing ring is provided with multiple screw holes that are threadedly connected to the multiple locking screws respectively.

[0017] In one embodiment, the pull rod is provided with an annular groove;

[0018] The inner ends of the plurality of connectors abut against the annular groove.

[0019] In one embodiment, the inner end of the connector is threadedly connected to the pull rod.

[0020] In one embodiment, the outer side of the housing is further provided with a disassembly hole;

[0021] The shaft is also provided with a marking hole, which is aligned with the clearance hole along the axial direction;

[0022] In the loosened position, the locking screw is radially aligned with the disassembly hole.

[0023] In one embodiment, the four clearance holes are evenly spaced circumferentially.

[0024] The four screw holes are evenly spaced along the circumference of the sensing ring;

[0025] The outer ends of the four locking screws are threaded to the sensing ring, and the inner ends pass through the four clearance holes and abut against the annular groove of the pull rod.

[0026] In one embodiment, the housing includes a bearing housing connected to the shaft via a bearing;

[0027] The knife release proximity switch and the knife clamping proximity switch are installed in the bearing housing;

[0028] The disassembly hole is located on the bearing housing.

[0029] In one embodiment, the housing further includes a bushing that is fitted over the shaft and connected to the bearing housing.

[0030] In one embodiment, the clearance hole is a waist-shaped hole.

[0031] This invention also relates to a method for disassembling the pull rod of a spindle tool release position detection mechanism, comprising the following steps:

[0032] S1. According to the above-mentioned spindle unclamping position detection mechanism, the power component drives the pull rod to a certain axial direction so that the pull rod is in the clamping position, and then rotates the shaft so that the marking hole is aligned with the disassembly hole along the axial direction;

[0033] S2. The power component drives the pull rod to a fixed axial direction, so that the pull rod is in the loosened position. At this time, the locking screw is aligned with the disassembly hole.

[0034] S3. Use a tool to remove the locking screw from the removal hole.

[0035] The connecting rod and the sensing ring are linked by a connector. The sensing ring can be coaxial with the shaft at the front end and moves with the internal connecting rod. The tool release proximity switch and the tool clamping proximity switch can detect the position of the sensing ring, and thus measure different positions of the connecting rod to complete the tool changing action of the machine tool. When the tool release proximity switch or the tool clamping proximity switch malfunctions, it needs to be adjusted. This can be done without disassembling the machine tool sheet metal; simply remove the two proximity switches from the front end of the shaft, which is very convenient. Attached Figure Description

[0036] Figure 1 This is an exploded view of a spindle chuck position detection mechanism according to an embodiment of the present invention.

[0037] Figure 2 yes Figure 1 A perspective view of the axis in the illustrated embodiment.

[0038] Figure 3 yes Figure 1 A perspective view of the pull rod in the illustrated embodiment.

[0039] Figure 4 yes Figure 1 A perspective view of the sensing ring in the illustrated embodiment.

[0040] Figure 5 yes Figure 1 A perspective view of the knife release proximity switch or knife clamp proximity switch in the illustrated embodiment.

[0041] Figure 6 yes Figure 1 A cross-sectional view along the axial direction of the spindle chuck position detection mechanism in the embodiment shown.

[0042] Figure 7 yes Figure 1 The illustrated embodiment shows cross-sectional views of the spindle clamping tool position detection mechanism at different angles along the axial direction.

[0043] Reference numerals in the attached diagram: 100, Spindle tool release / clamp position detection mechanism; 1, Shaft; 11, Center hole; 12, Clearance hole; 13, Marking hole; 2, Bearing seat; 21, Mounting position; 21, M10 screw hole; 22, Cable outlet hole; 23, Disassembly hole; 3, Sensing ring; 31, Detection boss; 32, Tool release proximity switch; 33, Tool clamp proximity switch; 34, Cable; 35, Screw hole; 36, M10 tooling; 4, Pull rod; 41, Annular groove; 5, Locking screw; 6, Pull claw assembly; 7, Hydraulic cylinder; 71, Piston; 8, Bushing; 9, Bearing; 101, Front flange; 102, Front nut; 103, Front end; 104, Rear end; Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of this invention clearer, the various embodiments of this invention will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been provided in the various embodiments of this invention to facilitate a better understanding of this application. However, the technical solutions claimed in the claims of this application can be implemented even without these technical details and with various variations and modifications based on the following embodiments.

[0045] Unless the context requires otherwise, throughout the specification and claims, the word “comprising” and its variations, such as “including” and “having”, shall be understood to have an open, inclusive meaning, that is, to be interpreted as “including, but not limited to”.

[0046] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings to provide a clearer understanding of the purpose, features, and advantages of the present invention. It should be understood that the embodiments shown in the drawings are not intended to limit the scope of the present invention, but are merely illustrative of the essential spirit of the technical solution of the present invention.

[0047] Throughout this specification, references to "an embodiment" or "an embodiment" indicate that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Therefore, the appearance of "in an embodiment" or "an embodiment" in various places throughout the specification does not necessarily refer to the same embodiment. Furthermore, a particular feature, structure, or characteristic may be combined in any manner in one or more embodiments.

[0048] The singular forms “a” and “the” used in this specification and the appended claims include plural references unless otherwise expressly stated herein. It should be noted that the term “or” is generally used to mean “and / or” unless otherwise expressly stated herein.

[0049] In the following description, in order to clearly demonstrate the structure and working method of the present invention, a number of directional terms will be used. However, terms such as "front", "back", "left", "right", "outside", "inside", "outward", "inward", "up", and "down" should be understood as convenient terms and not as limiting terms.

[0050] This invention relates to a spindle tool release position detection mechanism 100, such as... Figure 1 As shown, the spindle clamping position detection mechanism 100 includes a shaft 1, a housing, a bearing 9, a sensing ring 3, a connector, a pull rod 4, two proximity switches, a claw assembly 6, and a power component.

[0051] The shaft 1 is provided with a central hole 11 and four clearance holes 12. The central hole 11 is located at the center of the shaft 1 and extends along the axial direction of the shaft 1. The central hole 11 passes through the shaft 1 along the axial direction.

[0052] The four clearance holes 12 are formed by recesses from the radial outer side of the shaft 1 to the central hole 11. The four clearance holes 12 are evenly spaced along the circumference of the shaft 1, and the four clearance holes 12 have a preset length along the axial direction.

[0053] The housing includes a bushing 8 and a bearing housing 2, which are fixedly connected by screws and are fitted over the outside of the shaft 1. The bushing 8 is used to mount the machine tool housing.

[0054] The bearing housing 2 is located at the front end 103 and is rotatably connected to the shaft 1 via the bearing 9. The inner ring of the bearing 9 is interference-fitted onto the shaft 1, and the shaft 1 is supported by the bearing housing 2 for high-speed rotation.

[0055] The front end of the bearing housing 2 is also equipped with a front flange 101 and a front nut 102, which limit the inner and outer rings of the bearing 9.

[0056] The bearing housing 2 is provided with a mounting position 21, which is sleeved on the outside of the shaft 1 and radially spaced from the shaft 1. The mounting position 21 is equipped with two proximity switches, namely a tool release proximity switch 32 and a tool clamping proximity switch 33. The tool release proximity switch 32 and the tool clamping proximity switch 33 are located at different positions in the axial direction. The tool release proximity switch 32 is closer to the front end 103, that is, closer to the end of the pull rod 4 where the tool is mounted, compared to the tool clamping proximity switch 33.

[0057] The sensing ring 3 is annular and has a detection boss 31. The detection boss 31 is annular and located on the radial outer side of the sensing ring 3. The sensing ring 3 and the detection boss 31 are located in the mounting position 21 of the bearing seat 2 and are sleeved on the outside of the shaft 1. The sensing ring 3 and the shaft 1 are fitted with a small clearance, with a single-sided clearance of 0.02mm, to prevent the shaft 1 from vibrating during high-speed rotation.

[0058] The mounting positions 21 of the detection boss 31 and the bearing housing 2 are radially spaced. The sensing ring 3 and the detection boss 31 can rotate with the shaft 1 without touching the bearing housing 2.

[0059] The pull rod 4 is located in the center hole 11 of the shaft 1. The pull rod 4 is connected to the sensing ring 3 through four connectors. The outer ends of the four connectors are connected to the sensing ring 3, and the inner ends pass through the four clearance holes 12 respectively and are connected to the pull rod 4.

[0060] A claw assembly 6 is installed at the front end of the pull rod 4, which can clamp the cutting tool. A power component is installed at the rear end of the pull rod 4. The power component is connected to the housing and located at the rear end 104. The power component is a hydraulic cylinder 7. The piston 71 of the hydraulic cylinder 7 pushes the pull rod 4 to move axially to perform the action of loosening and clamping the cutting tool.

[0061] When the pull rod 4 moves axially, it can drive the sensing ring 3 to move between the tool release position and the tool clamping position, such as... Figure 5 As shown, the preset length of the clearance hole 12 along the axial direction needs to ensure that the sensing ring 3 can move between the tool release position and the tool clamping position. That is to say, the length of the clearance hole 12 along the axial direction needs to be greater than or equal to the distance between the tool release position and the tool clamping position.

[0062] In the unclipped position, such as Figure 5 The pull rod 4 and the sensing ring 3 on the left side are aligned radially with the tool release proximity switch 32, and the pull claw assembly 6 releases the tool.

[0063] In the tool clamping position, such as Figure 5 The pull rod 4 and sensing ring 3 are on the right side. The detection boss 31 of the sensing ring 3 is radially aligned with the tool proximity switch 33, and the pull claw assembly 6 clamps the tool.

[0064] During machining, the sensing ring 3 rotates together with the shaft 1. When a tool change is required, the shaft 1 stops rotating, the hydraulic cylinder 7 pushes the pull rod 4 forward beyond the front end 103 of the shaft 1, the tool holder is pushed out, the sensing ring 3 moves to the tool release position, the tool release proximity switch 32 senses the detection boss 31, displays an electrical signal, and feeds back to the tool magazine for tool change operation. The tool release proximity switch 32 can sense the signal when the distance between it and the detection boss 31 is less than 1mm.

[0065] After the tool is changed, piston 71 resets, pull rod 4 moves backward, and when sensing ring 3 moves to the tool clamping position with pull rod 4, the detection boss 31 of sensing ring 3 and tool clamping proximity switch 33 are aligned radially. Tool clamping proximity switch 33 senses the information to ensure that the tool is clamped, and shaft 1 can enter the working state.

[0066] The connecting rod 4 and the sensing ring 3 are linked by a connector. The sensing ring 3 is located coaxially with the shaft at the front end of the shaft 1 and moves with the internal connecting rod 4. The tool release proximity switch 32 and the tool clamping proximity switch 33 can detect the position of the sensing ring 3, thereby determining the different positions of the connecting rod 4 and completing the tool changing action of the machine tool. When the tool release proximity switch 32 or the tool clamping proximity switch 33 malfunctions and needs to be adjusted, it is not necessary to disassemble the machine tool sheet metal. Only the positions of the two proximity switches installed on the bearing seat need to be adjusted for maintenance, which is very convenient.

[0067] exist Figure 6 In the illustrated embodiment, to facilitate observation of the state of the pull rod 4 and the claw assembly 6, the pull rod 4 is divided into two parts along the axis. The left pull rod 4 and the sensing ring 3 are in the clamping position, and the right pull rod 4 and the sensing ring 3 are in the releasing position. It should be noted that... Figure 5 Only the pull rod 4, the sensing ring 3, and the components driven by the pull rod 4 were displaced. The rest, such as the bearing housing 2, the bushing 8, the tool release proximity switch 32, the tool clamping proximity switch 33, and the shaft 1, were not displaced. In other words, the cross-sectional view of the rest remained unchanged.

[0068] exist Figure 1-5 In the embodiment shown, the four connecting parts are locking screws 5, the sensing ring 3 is provided with four screw holes 35, and the pull rod 4 is provided with an annular groove 41. The outer ends of the four locking screws 5 are respectively threaded to the screw holes 35 of the sensing ring 3, and the inner ends are respectively abutted against the annular groove 41 of the pull rod 4.

[0069] When the pull rod 4 needs maintenance, the locking screw 5 can be unscrewed and removed from the annular groove 41, and then the pull rod 4 can be taken out for maintenance.

[0070] Of course, the pull rod 4 can also be provided with four threaded holes, and the inner ends of the four locking screws 5 can also be threaded to the pull rod 4.

[0071] It should be understood that in other embodiments, one or more connectors may be provided, as long as they can synchronize the pull rod 4 and the sensing ring 3. The connector is not limited to the locking screw 5.

[0072] exist Figure 1-5In the illustrated embodiment, the sensing ring 3 has four M4 screw holes 35 circumferentially, and the corresponding shaft 1 has four clearance holes 12. Each clearance hole 12 is an oblong hole. The pull rod 4 has an annular groove 41 at a corresponding position. The pull rod 4 is installed in the sensing ring 3 by four M4x35 locking screws 5, which pass through the four oblong holes of the shaft 1 and abut against the annular groove 41 of the pull rod 4. When the pull rod 4 moves, the four M4x35 locking screws 5 drive the sensing ring 3 to move axially.

[0073] Two radial M10 threaded holes 21 are opened in the bearing housing 2. The tool release proximity switch 32 and the tool clamping proximity switch 33 are respectively eccentrically mounted on the M10 fixture 36. The two M10 fixtures 36 are respectively installed in the two M10 threaded holes 21. Rotating the M10 fixture 36 can adjust the position of the tool release proximity switch 32 and the tool clamping proximity switch 33 to ensure that when the pull rod 4 is in the tool release position or the tool clamping position, the tool release proximity switch and the tool clamping proximity switch 33 can sense the signal.

[0074] The radial outer end opening of the M10 threaded hole 21 has an M12 thread. A plug can be installed at the radial opening of the M12 to prevent external contaminants from entering.

[0075] If the positions of the two proximity switches are abnormal, by rotating the M10 fixture 3, since both proximity switches are eccentrically set, displacement is found in the vertical direction during the rotation, and the detection position can be adjusted.

[0076] In addition, the rear end 104 of the bearing housing 2 has two cable outlet holes 22, which are connected to two M10 threaded holes respectively. The cables 34 of the knife release proximity switch 32 and the knife clamping proximity switch 33 can be extended from the cable outlet holes 22 to the outside and enter the reserved hole of the housing to the rear end 104 of the shaft 1.

[0077] A section of cable can be reserved in the two radial M10 threaded holes 21 and the cable outlet hole 22 of the mounting cable 34. If the proximity switch is damaged, the cable can be cut off, the proximity switch replaced, and the cable re-soldered.

[0078] In addition, when the pull rod 4 moves axially, it can also drive the sensing ring 3 to move between the tool release position, the tool clamping position, and the tool-free position. The tool-free position means that no tool is installed. The sensing ring 3 is closer to the rear end. The tool-free position, the tool clamping position, and the tool release position are arranged from the rear end 104 to the front end 103, respectively.

[0079] The bearing housing 2 is also equipped with another bladeless proximity switch. The bladeless proximity switch is the same as the two proximity switches mentioned above, except that it is installed at the rear end of the blade proximity switch and has a certain distance from the blade proximity switch along the axial direction. When there is no blade, the detection boss 31 of the sensing ring 3 is aligned radially with the bladeless proximity switch.

[0080] The mounting position 21 of the bearing housing 2 is also provided with a disassembly hole 23, which extends radially outward to inward along the bearing housing 2. When the sensing ring 3 is in the loosened position, the locking screw 5 is radially aligned with the disassembly hole 23.

[0081] The front end of the shaft 1 has four marking holes 13. The four marking holes 13 are located on the radial outer side of the shaft and are aligned with the four clearance holes 12 along the axial direction, which are also aligned with the four locking screws 5 along the axial direction.

[0082] When the pull rod is in the tool-free position or the tool-clamping position, first rotate the shaft 1 by a certain angle to align the marking hole 13 with the disassembly hole 23 of the bearing seat axially. When in the tool-loosening position, the locking screw 5 can be radially aligned with the disassembly hole 23.

[0083] The locking screw 5 links the pull rod 4 and the sensing ring 3, thereby limiting the pull rod 4. Moreover, due to the limiting effect of the clearance hole 12 of the shaft 1, the pull rod 4 cannot be pulled out from the rear end 104 of the shaft 1 when it is disassembled.

[0084] The bearing housing 2 is provided with a disassembly hole 23, such as Figure 7 As shown, when it is necessary to disassemble the pull rod 4, first push the pull rod to the clamping position or the no-tool position. Align the marking hole 13 with the disassembly hole 23 of the bearing seat axially. Push the sensing ring 3 of the pull rod 4 to the tool-releasing position. At this time, align the locking screw 5 with the disassembly hole 23 radially. Unscrew the locking screw 5 a certain distance to remove it from the annular groove of the pull rod 4, and the pull rod 4 can be disassembled. This anti-disassembly structure can effectively protect the internal structure of the pull rod 4 of the shaft 1 from being disassembled and copied.

[0085] This invention also relates to a method for disassembling the pull rod of a spindle tool release position detection mechanism, comprising the following steps:

[0086] S1. According to the above-mentioned spindle unclamping position detection mechanism, the power component drives the pull rod to a certain axial direction so that the pull rod is in the clamping position, and then rotates the shaft so that the marking hole is aligned with the disassembly hole along the axial direction;

[0087] S2. The power component drives the pull rod to a fixed axial direction, so that the pull rod is in the loosened position. At this time, the locking screw is aligned with the disassembly hole.

[0088] S3. Use a tool to remove the locking screw from the removal hole.

[0089] The preferred embodiments of the present invention have been described in detail above, but it should be understood that, if necessary, aspects of the embodiments can be modified to utilize aspects, features, and concepts from various patents, applications, and publications to provide other embodiments.

[0090] In light of the detailed description above, these and other changes can be made to the embodiments. Generally, the terminology used in the claims should not be considered limited to the specific embodiments disclosed in the specification and claims, but should be understood to include all possible embodiments together with the full scope of equivalents enjoyed by these claims.

[0091] Those skilled in the art will understand that the above embodiments are specific examples of implementing the present invention, and in practical applications, various changes in form and detail may be made without departing from the spirit and scope of the present invention.

Claims

1. A spindle tool release / release position detection mechanism, characterized in that, include: A shaft, the shaft having a clearance hole and a central hole extending axially, the clearance hole extending radially outward from the outer side of the shaft to the central hole and extending axially for a predetermined length; The housing covers the shaft and has a knife release proximity switch and a knife clamping proximity switch at its front end; A sensing ring, wherein the sensing ring is located inside the housing and is sleeved around the shaft; A connector, the outer end of which is connected to the sensing ring, and the inner end of which passes through multiple clearance holes and enters the central hole; A pull rod is located in the central hole and connected to the inner end of the connector; a claw assembly is installed at one end of the pull rod for clamping the tool; a power component is connected to the other end of the pull rod for driving the pull rod to move the sensing ring between the tool release position and the tool clamping position. At the tool release position, the sensing ring aligns with the tool release proximity switch, and the claw assembly releases the tool; At the tool clamping position, the sensing ring is aligned with the tool clamping proximity switch, and the pull claw assembly clamps the tool.

2. The spindle clamping position detection mechanism according to claim 1, characterized in that, The plurality of the clearance holes are arranged circumferentially around the axis; The outer ends of the plurality of connectors are respectively connected to the sensing ring, and the inner ends are respectively connected to the pull rod through the plurality of clearance holes.

3. The spindle clamping position detection mechanism according to claim 2, characterized in that, The connecting component is a locking screw; The sensing ring is provided with multiple screw holes that are threadedly connected to the multiple locking screws respectively.

4. The spindle clamping position detection mechanism according to claim 3, characterized in that, The tie rod is provided with an annular groove; The inner ends of the plurality of connectors abut against the annular groove.

5. The spindle clamping position detection mechanism according to claim 3, characterized in that, The inner end of the connector is threadedly connected to the pull rod.

6. The spindle clamping position detection mechanism according to claim 3, characterized in that, The outer side of the outer casing is also provided with a disassembly hole; The shaft is also provided with a marking hole, which is aligned with the clearance hole along the axial direction; In the loosened position, the locking screw is radially aligned with the disassembly hole.

7. The spindle clamping position detection mechanism according to claim 5, characterized in that, The four clearance holes are evenly spaced along the circumference; The four screw holes are evenly spaced along the circumference of the sensing ring; The outer ends of the four locking screws are threaded to the sensing ring, and the inner ends pass through the four clearance holes and abut against the annular groove of the pull rod.

8. The spindle clamping position detection mechanism according to claim 6, characterized in that, The housing includes a bearing housing, which is connected to the shaft via a bearing. The knife release proximity switch and the knife clamping proximity switch are installed in the bearing housing; The disassembly hole is located on the bearing housing.

9. The spindle clamping position detection mechanism according to claim 8, characterized in that, The housing also includes a bushing, which is fitted over the shaft and connected to the bearing housing.

10. The spindle chuck position detection mechanism according to claim 1, characterized in that, The clearance hole is a waist-shaped hole.

11. A method for disassembling the pull rod of a spindle tool release / release position detection mechanism, characterized in that, Including the following steps: S1. According to claim 6, the spindle clamping position detection mechanism is wherein the power component drives the pull rod to a certain axial direction so that the pull rod is in the clamping position, and then rotates the shaft so that the marking hole is aligned with the disassembly hole along the axial direction; S2. The power component drives the pull rod to a fixed axial direction, so that the pull rod is in the loosened position. At this time, the locking screw is aligned with the disassembly hole. S3. Use a tool to remove the locking screw from the removal hole.

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