Tapping equipment for micro shaft

Abstract

The utility model relates to the technical field of micro shaft machining, in particular to micro shaft trepanning equipment which comprises a machine base, a rotating disc is rotationally arranged on the machine base, a plurality of mounting seats are arranged on the rotating disc and evenly distributed along the circumferential side of the rotating disc at intervals, and mounting holes used for allowing the micro shafts to be inserted are formed in the mounting seats. And an avoiding hole is formed in the side wall of the mounting base, and a first driving assembly used for driving the rotating disc to rotate intermittently, a punching assembly used for punching the miniature shaft and a second driving assembly used for driving the punching assembly to penetrate into or be separated from the avoiding hole are arranged on the machine base. Through the arrangement of the first driving assembly and the multiple mounting bases, on the premise that punching of the punching assembly on the miniature shaft is not affected, feeding and discharging operation of the miniature shaft is achieved, overall use is easy and convenient, and the machining efficiency is higher.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of micro shaft machining, in particular to a micro shaft tapping device. BACKGROUND

[0002] In the process of tapping the outer wall of the shaft workpiece, it is difficult to fix the shaft part before tapping due to the smooth outer wall of the shaft part, especially for the micro shaft, because the diameter of the micro shaft is small, making it more difficult to fix the micro shaft, and the axial position and radial depth of the tapping on the micro shaft directly affect the quality of the micro shaft after machining, so that tapping on the outer wall of the micro shaft becomes a technical challenge.

[0003] For the tapping process of the micro shaft, the existing method is usually to send the micro shaft to the machining center for machining, and the micro shaft is fixed by a special clamp before machining, and then the machining center is started to tap the outer wall of the micro shaft.

[0004] However, in actual application, the method of tapping the micro shaft by the machining center needs to pause the operation of the machining center first, then open the clamp to replace the micro shaft, and then re-fix it before restarting the machining center, that is, the overall machining process is intermittent machining, and the overall efficiency of this machining method is low, which needs to be improved. Invention content

[0005] In order to solve the problem of intermittent machining and low overall machining efficiency of the existing tapping process of the micro shaft, the present application provides a micro shaft tapping device.

[0006] The micro shaft tapping device provided by the present application adopts the following technical scheme:

[0007] A micro shaft tapping device, comprising a machine base, a rotating disc is rotatably arranged on the machine base, an installation seat is arranged on the rotating disc, a plurality of installation seats are arranged, and the plurality of installation seats are uniformly distributed along the circumferential side of the rotating disc, an installation hole for inserting a micro shaft is arranged on the installation seat, an avoidance hole is arranged on the side wall of the installation seat, the avoidance hole is communicated with the installation hole, a first driving assembly for intermittently driving the rotating disc is arranged on the machine base, a tapping assembly for tapping the micro shaft is arranged, and a second driving assembly for driving the tapping assembly to penetrate or separate from the avoidance hole is arranged.

[0008] By adopting the technical scheme, in use, the micro shafts to be drilled are inserted into the corresponding mounting holes one by one by the cooperation of the mounting seats, and under the action of the first driving assembly, the micro shafts are rotated to the corresponding positions of the punching assembly by the rotating disc, and after the punching assembly punches the micro shafts, the punched micro shafts are rotated away from the punching assembly by the rotating disc, and the unpunched micro shafts are rotated into the corresponding positions of the punching assembly, then the punched micro shafts are discharged by the workers, and the unpunched micro shafts are inserted into the mounting holes, and in the punching process, the punching assembly is driven to approach or move away from the mounting seat by the second driving assembly, so that the normal punching of the micro shafts by the punching assembly is ensured, and the rotation of the rotating disc is avoided, and the overall processing process is simple and efficient, and the use is more convenient.

[0009] Preferably, the punching assembly comprises a sliding seat slidingly arranged on the machine base, a first driving motor mounted on the sliding seat, and a drill head rotationally arranged on the sliding seat, an output shaft of the first driving motor is coaxially and fixedly connected with the drill head after penetrating through the sliding seat, the drill head penetrates into the relief hole to punch the micro shaft, and the second driving assembly is used to drive the sliding seat to slide.

[0010] By adopting the technical scheme, when the rotating disc rotates to the position that the relief hole on one mounting seat is aligned with the drill head, the sliding seat moves towards the mounting seat under the action of the second driving assembly to drive the drill head to penetrate into the relief hole, and the first driving motor is driven to punch the side wall of the micro shaft, and after the punching is completed, the sliding seat is driven away from the mounting seat by the second driving assembly to avoid affecting the rotation of the rotating disc.

[0011] Preferably, the first driving assembly comprises a cam divider arranged on the machine base and a second driving motor, an output shaft of the second driving motor is coaxially and fixedly connected with an input shaft of the cam divider, and an output shaft of the cam divider is coaxially and fixedly connected with the rotating disc.

[0012] By adopting the technical scheme, in use, the continuous input motion of the motor is converted into intermittent output motion by the cooperation of the second driving motor and the cam divider, so as to facilitate the feeding and discharging operation of the workers on the micro shafts and the punching of the punching assembly on the micro shafts, thereby ensuring the processing efficiency of the micro shafts.

[0013] Preferably, the second driving assembly comprises a linkage shaft rotationally arranged on the machine base, a first cam fixed on the linkage shaft, a connecting rod fixed on the sliding seat, an abutting wheel rotationally arranged on the connecting rod away from the sliding seat, and a reset spring for driving the sliding seat to reset, the side wall of the first cam is in abutting cooperation with the side wall of the abutting wheel, and the machine base is further provided with a limiting structure for preventing the linkage shaft from moving axially.

[0014] By adopting the technical scheme, when in use, the rotation of the linkage shaft drives the first cam to rotate, so that the guiding abutment of the first cam to the abutment wheel is realized, the purpose of driving the sliding seat to slide towards the installation seat is achieved, and the sliding seat is pulled to the original position by the elastic tension of the return spring, so that the whole device is simple and convenient to use.

[0015] Preferably, the limiting structure comprises a first abutment ball rotating at one end of the linkage shaft away from the first bevel gear, a first connecting plate fixed on the machine base, a first limiting rod fixed on the first connecting plate, and an abutment block provided at the end of the first limiting rod, wherein a first abutment groove is formed in the abutment block, and the bottom wall of the first abutment groove abuts with the first abutment ball.

[0016] By adopting the technical scheme, when in use, the cooperation of the first abutment, the first limiting rod, the abutment block and the first abutment groove realizes the axial positioning of the linkage shaft without affecting the rotation of the linkage shaft, so as to ensure the punching precision of the punching assembly on the micro shaft.

[0017] Preferably, the linkage shaft is coaxially and fixedly connected with a first bevel gear, the cam divider input shaft is coaxially and fixedly connected with a second bevel gear, and the first bevel gear and the second bevel gear are meshed.

[0018] By adopting the technical scheme, when in use, the cooperation of the first bevel gear and the second bevel gear realizes the rotation of the cam divider and the linkage shaft driven by the output shaft of the second driving motor, so as to realize the automatic rotation of the linkage shaft without adding driving equipment, thereby saving the processing cost.

[0019] Preferably, the sliding seat comprises a first seat body slidingly connected to the machine base, a second seat body slidingly connected to the first seat body, and an adjusting assembly provided on the first seat body for adjusting the sliding position of the second seat body, wherein the connecting rod and the second driving assembly are provided on the first seat body, and the first driving motor and the drill bit are provided on the second seat body.

[0020] By adopting the technical scheme, when in use, the adjustment of the distance between the drill bit and the installation seat is realized by the provision of the adjusting assembly, so as to facilitate the staff to adjust the position of the second seat body according to the processing needs, thereby controlling the depth of the punching on the micro shaft and improving the application range of the device.

[0021] Preferably, the machine base is provided with a positioning assembly for axially positioning the micro shaft in the mounting hole.

[0022] By adopting the technical scheme, when in use, the micro shaft to be punched is axially positioned through the positioning assembly, so as to ensure the machining precision of the micro shaft.

[0023] To sum up, the present application has at least one of the following beneficial technical effects:

[0024] 1. By using a plurality of mounting seats, the staff inserts the micro shaft to be punched into the corresponding mounting hole one by one, under the action of the first driving assembly, the micro shaft is rotated to the corresponding position of the punching assembly by the rotating disc, and after the punching assembly punches it, the micro shaft after punching is rotated away from the punching assembly by the rotation of the rotating disc, and the micro shaft after punching is unloaded by the staff, and the micro shaft after punching is inserted into the mounting hole, and in the punching process, the second driving assembly drives the punching assembly to approach or move away from the mounting seat, so as to ensure that the punching assembly normally punches the micro shaft, avoid the influence of the punching assembly on the rotation of the rotating disc, the whole machining process is simple and efficient, and the use is more convenient;

[0025] 2. By using the cam divider and the second driving motor, the continuous input motion of the motor is converted into intermittent output motion, so as to facilitate the staff to unload and load the micro shaft, and the punching assembly to punch the micro shaft, so as to ensure the machining efficiency of the micro shaft;

[0026] 3. By cooperation of the linkage shaft, the first cam, the abutting wheel, the return spring, the first bevel gear and the second bevel gear, the purpose of synchronously driving the cam divider and the linkage shaft by one second driving motor is achieved, and the use cost of the device is saved. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is the axonometric view mainly embodying the overall structure in the embodiment of the present application;

[0028] Figure 2 is the axonometric view mainly embodying the rotating disc mounting structure in the embodiment of the present application;

[0029] Figure 3 is the axonometric view mainly embodying the structure of the first driving assembly in the embodiment of the present application;

[0030] Figure 4 is the axonometric view mainly embodying the structure of the punching assembly in the embodiment of the present application;

[0031] Figure 5 is the axonometric view mainly embodying the structure of the second driving assembly in the embodiment of the present application;

[0032] Figure 6is the exploded view of the sliding seat structure mainly embodied in the embodiment of the application;

[0033] Figure 7 is the axonometric view of the adjusting assembly structure mainly embodied in the embodiment of the application;

[0034] Figure 8 is the exploded view of the limiting structure mainly embodied in the embodiment of the application;

[0035] Figure 9 is the exploded view of the positioning assembly structure mainly embodied in the embodiment of the application.

[0036] The reference signs: 1, machine base; 2, rotating disc; 3, mounting seat; 31, mounting hole; 32, avoiding hole; 4, first driving assembly; 41, cam divider; 42, second driving motor; 5, punching assembly; 51, sliding seat; 511, first seat body; 512, second seat body; 513, adjusting assembly; 5131, third fixed seat; 5132, fourth fixed seat; 5133, adjusting screw; 52, first driving motor; 53, drill bit; 6, second driving assembly; 61, linkage shaft; 62, first cam; 63, connecting rod; 64, abutting wheel; 65, return spring; 66, first bevel gear; 67, second bevel gear; 7, limiting structure; 71, first abutting ball; 72, first connecting plate; 73, first limiting rod; 74, abutting block; 8, positioning assembly; 81, upper cylinder; 82, lower cylinder; 83, limiting spring; 84, second abutting ball; 9, first fixed seat; 10, second fixed seat; 20, sliding rod; 30, second cam; 40, counting device; 50, oil injection pipe. DETAILED DESCRIPTION

[0037] The following will be described in detail with reference to the accompanying drawings Figure 1 - the accompanying drawings Figure 9 The application will be further described in detail.

[0038] The embodiment of the application discloses a micro shaft drilling equipment.

[0039] Reference Figure 1 and Figure 2 A micro shaft drilling equipment, comprising a machine base 1 placed horizontally, a rotating disc 2 is rotationally connected on the machine base 1, a plurality of mounting seats 3 are arranged on the rotating disc 2, the plurality of mounting seats 3 are evenly distributed along the circumferential side of the rotating disc 2, in the embodiment, the mounting seats 3 are eight, the mounting hole 31 is arranged in the vertical direction at the top end of each mounting seat 3, and the avoiding hole 32 is arranged in the horizontal direction on the side wall of the mounting seat 3, the avoiding hole 32 is communicated with the mounting hole 31, and the mounting hole 31 is used for inserting the micro shaft.

[0040] Reference Figure 1 and Figure 2The first driving assembly 4, the punching assembly 5 and the second driving assembly 6 are arranged on the base 1, and the punching assembly 5 is arranged on one side of one of the mounting seats 3; in use, after the staff inserts the micro shaft into the mounting hole 31, the rotating disc 2 can be driven to rotate by the first driving assembly 4, so as to drive the mounting seat 3 with the micro shaft to rotate to be close to the punching assembly 5, then the punching assembly 5 is driven to punch the micro shaft through the avoiding hole 32 by the second driving assembly 6, and after the punching is completed, the punching assembly 5 is driven to be away from the mounting seat 3.

[0041] With reference to Figure 2 and Figure 3 , the first driving assembly 4 comprises a cam divider 41 and a second driving motor 42, both of which are arranged on the base 1, the input shaft of the cam divider 41 is coaxially fixedly connected with the output shaft of the second driving motor 42, and the output shaft of the cam divider 41 is coaxially fixedly connected with the rotating disc 2; in use, the input shaft of the cam divider 41 is driven to rotate by the output shaft of the second driving motor 42, so as to convert the continuous input motion of the motor into intermittent output motion by the cam divider 41, so as to realize the intermittent rotation of the rotating disc 2, thereby facilitating the staff to feed the rotating disc 2 and the punching assembly 5 to punch the micro shaft on the mounting seat 3.

[0042] With reference to Figure 2 and Figure 4 , the punching assembly 5 comprises a sliding seat 51, a first driving motor 52 and a drill bit 53, wherein the sliding seat 51 is slidingly connected to the base 1, the first driving motor 52 is arranged on the sliding seat 51 by bolts, the drill bit 53 is rotatably arranged on one end of the sliding seat 51 facing the mounting seat 3, and the output shaft of the first driving motor 52 is coaxially fixedly connected with the drill bit 53 through the sliding seat 51; in use, the sliding seat 51 is driven to move towards the mounting seat 3 by the second driving assembly 6 until the drill bit 53 extends into the avoiding hole 32 and abuts against the side wall of the micro shaft in the mounting hole 31, then the drill bit 53 is driven to rotate by the output shaft of the first driving motor 52, so as to realize the punching of the side wall of the micro shaft.

[0043] With reference to Figure 2 and Figure 5 , the second driving assembly 6 comprises a linkage shaft 61, a first cam 62, a connecting rod 63, an abutting wheel 64 and a return spring 65, the linkage shaft 61 is rotatably connected to the base 1, the first cam 62 is coaxially fixedly connected to the linkage shaft 61, one end of the connecting rod 63 is fixedly welded to the sliding seat 51, the abutting wheel 64 is rotatably connected to the end of the connecting rod 63 away from the sliding seat 51, and in this embodiment, the abutting wheel 64 can also be replaced by a ball bearing, and the side wall of the first cam 62 abuts against the abutting wheel 64.

[0044] With reference to Figure 5 andFigure 6 A first fixing seat 9 is fixedly connected to the base 1 by bolts, a second fixing seat 10 is fixedly connected to the bottom end of the sliding seat 51 by bolts, a sliding rod 20 is welded to the second fixing seat 10, the sliding rod 20 is slidably connected to the first fixing seat 9 at the end away from the second fixing seat 10, a return spring 65 is sleeved on the sliding rod 20, and one end of the return spring 65 is welded and fixed to the first fixing seat 9, and the other end of the return spring 65 is welded and fixed to the second fixing seat 10.

[0045] Referring to Figure 4 and Figure 6 , the sliding seat 51 comprises a first seat body 511, a second seat body 512 and an adjusting assembly 513, the first seat body 511 is slidably connected to the base 1, the second seat body 512 is slidably connected to the first seat body 511, the adjusting assembly 513, the connecting rod 63 and the second driving assembly 6 are all arranged on the first seat body 511, and the first driving motor 52 and the drill bit 53 are arranged on the second seat body 512; in use, the second seat body 512 is driven to slide through the adjusting assembly 513, so as to adjust the distance between the drill bit 53 and the mounting seat 3, thereby controlling the punching depth of the drill bit 53 on the micro shaft, so as to adapt to different processing requirements.

[0046] Referring to Figure 4 and Figure 7 , the adjusting assembly 513 comprises a third fixing seat 5131 fixed to the first seat body 511 by bolts, a fourth fixing seat 5132 welded to the side wall of the second seat body 512, and an adjusting screw 5133 threadedly connected to the third fixing seat 5131, one end of the adjusting screw 5133 is rotatably connected to the fourth fixing seat 5132 after penetrating through the third fixing seat 5131; in use, the fourth fixing seat 5132 is driven to slide by rotating the adjusting screw 5133, so as to drive the second seat body 512 to slide, thereby realizing the adjustment of the position of the drill bit 53.

[0047] Referring to Figure 2 and Figure 5 , in addition, a first bevel gear 66 is coaxially and fixedly connected to one end of the linkage shaft 61, a second bevel gear 67 is coaxially and fixedly connected to the input shaft of the cam divider 41, and the first bevel gear 66 and the second bevel gear 67 are in meshing engagement; in use, when the second driving motor 42 drives the cam divider 41 to rotate, the linkage shaft 61 rotates synchronously under the cooperation of the first bevel gear 66 and the second bevel gear 67, the linkage shaft 61 drives the first cam 62 to rotate, so that the first cam 62 abuts against the abutting wheel 64, thereby achieving the purpose of driving the sliding seat 51 to slide towards the mounting seat 3, and in cooperation with the use of the return spring 65, the sliding seat 51 can slide away from the mounting seat 3.

[0048] Referring to Figure 1 and Figure 2Meanwhile, the second cam 30 can also be arranged on the linkage shaft 61, and the counting device 40 matched with the second cam 30 is arranged on one side of the second cam 30, that is, in use, when the linkage shaft 61 rotates one circle, the protruding part on the second cam 30 will collide with the detection head of the counting device 40 once, so that the counting device 40 completes one counting, so that the quantity of the processed micro shafts can be measured, and the whole use is more convenient.

[0049] With reference to Figure 2 and Figure 5 When the protruding part on the first cam 62 abuts against the abutting wheel 64, the drill bit 53 extends into the avoiding hole 32, and at this time, the punching processing of the micro shaft can be realized; when the protruding part on the first cam 62 is separated from the abutting wheel 64, the slide seat 51 drives the drill bit 53 to separate from the avoiding hole 32 under the action of the reset spring 65, so as to avoid the influence of the drill bit 53 on the rotation of the rotating disc 2; during the punching process, the abutting wheel 64 will generate a reverse impact force on the first cam 62, so that the linkage shaft 61 has a tendency of axial displacement, in order to avoid the change of the depth of the drill bit 53 extending into the avoiding hole 32 caused by the axial movement of the linkage shaft 61, the limiting structure 7 is further arranged on the machine base 1.

[0050] With reference to Figure 5 and Figure 8 The limiting structure 7 is used for axially positioning the linkage shaft 61, and the limiting structure 7 comprises a first abutting ball 71, a first connecting plate 72, a first limiting rod 73 and an abutting block 74, wherein the first abutting ball 71 is rotatably arranged at one end of the linkage shaft 61 away from the first bevel gear 66, the first connecting plate 72 is fixed on the machine base 1 through bolts, the first limiting rod 73 is fixed at the top end of the first connecting plate 72 through bolts, and the abutting block 74 is fixed at one end of the first limiting rod 73 facing the linkage shaft 61 through welding, a first abutting groove is arranged on the end face of the abutting block 74, and the first abutting ball 71 and the side wall of the first abutting groove are in abutting cooperation.

[0051] With reference to Figure 5 and Figure 8 In use, the first abutting ball 71 is limited by the inner wall of the first abutting groove, so as to position the axial direction of the linkage shaft 61, so as to avoid the axial movement of the linkage shaft 61 during the punching process, and the rotation of the first abutting ball 71 at the end of the linkage shaft 61 will not interfere with the rotation of the first cam 62, so as to ensure the punching precision of the micro shaft and the processing quality of the micro shaft.

[0052] With reference to Figure 1 and Figure 2In addition, the oil injection pipe 50 is arranged on the base 1. The oil injection pipe 50 can be a gooseneck pipe. One end of the oil injection pipe 50 is connected with an external oil supply pipe, and the other end of the oil injection pipe 50 is aligned with the mounting hole 31 in the mounting seat 3 corresponding to the punching assembly 5. During the punching of the micro shaft, oil is injected into the mounting hole 31 and the outer wall of the micro shaft through the oil injection pipe 50, so as to realize the lubrication and cooling of the micro shaft. In order to prevent the oil from flowing to the outside, the base 1 can be fixed on the top of a collecting box, so that the oil flowing out of the oil injection pipe 50 can be recycled through the collecting box.

[0053] With reference to Figure 2 And Figure 9 The positioning assembly 8 is arranged on the base 1. The positioning assembly 8 is used for axially positioning the micro shaft in the mounting hole 31, so as to ensure the accuracy of the subsequent punching operation of the micro shaft. The positioning assembly 8 comprises an upper cylinder 81 fixed on the base 1, a lower cylinder 82 threadedly connected with the bottom end of the upper cylinder 81, a limiting spring 83 arranged between the upper cylinder 81 and the lower cylinder 82, and a second abutting ball 84 slidingly arranged at the bottom end of the lower cylinder 82. One end of the limiting spring 83 is in abutment with the inner wall of the upper cylinder 81, and the other end of the limiting spring 65 is welded and fixed with the second abutting ball 84. The second abutting ball 84 is in abutment and cooperation with the top end of the micro shaft in the mounting hole 31.

[0054] With reference to Figure 1 And Figure 8 In use, after the staff inserts the micro shaft into the mounting hole 31, the micro shaft rotates synchronously with the rotation of the rotating disc 2. When the micro shaft rotates to contact the second abutting ball 84, the second abutting ball 84 vertically presses the micro shaft under the action of the limiting spring 83, so as to ensure the axial positioning accuracy of the micro shaft, and thus ensure the accuracy of the subsequent punching position of the side wall of the micro shaft.

[0055] The implementation principle of the embodiment of the application is as follows: when in use, a worker inserts a plurality of micro shafts into a plurality of mounting holes 31 on the rotating disc 2 one by one, and then starts the second driving motor 42, under the action of the cam divider 41, the rotating disc 2 is intermittently rotated, when a micro shaft rotates to be close to the punching assembly 5, the micro shaft is first axially positioned by the positioning assembly 8, and then under the cooperation of the first bevel gear 66 and the second bevel gear 67, the linkage shaft 61 drives the first cam 62 to rotate, so as to drive the sliding seat 51 to drive the drill bit 53 to be close to the mounting seat 3 as a whole, until the drill bit 53 is inserted into the avoiding hole 32, and at the same time, under the action of the first driving motor 52, the drill bit 53 rotates to realize the punching processing of the micro shaft, with the rotation of the first cam 62, when the protruding part of the first cam 62 is separated from the abutting wheel 64, under the pulling force of the return spring 65, the sliding seat 51 and the drill bit 53 are separated from the avoiding hole 32 as a whole, and then the rotating disc 2 drives the processed micro shaft to move away from the punching assembly 5, and the second micro shaft to be punched is rotated to be aligned with the drill bit 53, the punching assembly 5 is intermittently started to punch the micro shaft under the action of the second driving assembly 6, in this process, the worker only needs to continuously take out the processed micro shaft and put in the unprocessed micro shaft, and the whole processing process is simple and fast.

[0056] The above are preferred embodiments of the application, and do not limit the protection scope of the application, therefore: any equivalent changes made on the structure, shape and principle of the application should be covered in the protection scope of the application.

Claims

1. A microshaft trepanning apparatus characterized by: The utility model provides a micro motor hole puncher, including frame (1), the frame (1) is provided with rotating disc (2) rotationally, and the rotating disc (2) is provided with mounting seat (3), the mounting seat (3) is provided with several, and several mounting seat (3) evenly distributed along rotating disc (2) circumferential side interval, the mounting seat (3) is opened with the mounting hole (31) for inserting micro motor shaft, the mounting seat (3) side wall is opened with the avoiding hole (32), the avoiding hole (32) is communicated with mounting hole (31), the frame (1) is provided with the first drive assembly (4) for driving rotating disc (2) intermittent rotation, the punch assembly (5) for micro motor punch, and the second drive assembly (6) for driving punch assembly (5) and penetrate or separate from avoiding hole (32).

2. A micro-bore apparatus for a miniature shaft according to claim 1, wherein: The punch assembly (5) includes a sliding seat (51) slidingly disposed on the frame (1), a first drive motor (52) mounted on the sliding seat (51), and a drill bit (53) rotationally disposed on the sliding seat (51). The output shaft of the first drive motor (52) is coaxially fixedly connected with the drill bit (53) after penetrating through the sliding seat (51). The drill bit (53) punches the micro motor after penetrating into the avoiding hole (32). The second drive assembly (6) is used to drive the sliding seat (51) to slide.

3. A micro-bore apparatus for a miniature shaft according to claim 2, wherein: The first drive assembly (4) includes a cam divider (41) and a second drive motor (42) disposed on the frame (1). The output shaft of the second drive motor (42) is coaxially fixedly connected with the input shaft of the cam divider (41). The output shaft of the cam divider (41) is coaxially fixedly connected with the rotating disc (2).

4. A micro-bore apparatus for a miniature shaft according to claim 3, wherein: The second drive assembly (6) includes a linkage shaft (61) rotationally disposed on the frame (1), a first cam (62) fixedly connected with the linkage shaft (61), a connecting rod (63) fixedly connected with the sliding seat (51), an abutting wheel (64) rotationally disposed on the connecting rod (63) away from the sliding seat (51), and a reset spring (65) for resetting the sliding seat (51). The side wall of the first cam (62) is in abutting engagement with the side wall of the abutting wheel (64). The frame (1) is further provided with a limiting structure (7) for preventing the linkage shaft (61) from moving axially.

5. A micro-bore apparatus for a miniature shaft according to claim 4, wherein: The limiting structure (7) includes a first abutting ball (71) rotationally disposed on the linkage shaft (61) away from the first bevel gear (66), a first connecting plate (72) fixedly connected with the frame (1), a first limiting rod (73) fixedly connected with the first connecting plate (72), and an abutting block (74) disposed on the end of the first limiting rod (73). The first abutting groove is formed in the abutting block (74). The bottom wall of the first abutting groove is in abutting engagement with the first abutting ball (71).

6. A micro-bore apparatus for a miniature shaft according to claim 4, wherein: The first bevel gear (66) is coaxially fixedly connected with the linkage shaft (61). The second bevel gear (67) is coaxially fixedly connected with the input shaft of the cam divider (41). The first bevel gear (66) and the second bevel gear (67) are in meshing engagement.

7. A micro-bushing apparatus as defined in claim 4, wherein: The sliding seat (51) comprises a first seat body (511) slidably connected to the machine base (1), a second seat body (512) slidably connected to the first seat body (511), and an adjusting assembly (513) arranged on the first seat body (511) and used for adjusting the sliding position of the second seat body (512), the connecting rod (63) and the second driving assembly (6) are arranged on the first seat body (511), and the first driving motor (52) and the drill bit (53) are arranged on the second seat body (512).

8. A micro-bushing apparatus according to claim 1, wherein: The machine base (1) is provided with a positioning assembly (8) used for axially positioning the micro shaft in the mounting hole (31).

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