A precision drive mechanism for tool processing

Abstract

The present invention relates to the technical field of mechanical equipment, and specifically to a precision drive mechanism for tool processing, comprising a shell, the shell comprising a support seat, and a sleeve is fixedly installed on the top of the support seat, the drive structure is fixedly installed inside the sleeve, the drive structure comprises a support frame, and the support frame is fixedly installed inside the sleeve, a motor is fixedly installed on the top of the support frame, and a drive unit is fixedly installed on one end of the rotating output shaft of the motor, and the drive unit comprises a circular plate; when the milling cutter is stuck in the required processing tool, and the mechanism in the CNC machine tool continuously drives the device to squeeze the tool, the milling cutter squeezes the circular gear c, so that the teeth of the circular gear c and the teeth of the circular gear b are misaligned, thereby avoiding that when the overload protection device inside the motor fails, the motor is damaged due to a load exceeding its rated load, thereby improving the service life of the device.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical equipment, in particular to a precision driving mechanism for tool processing. Background Art

[0002] Cutting tools are tools used for cutting in mechanical manufacturing, also known as cutting tools. For example, the spindle drive component of a CNC machine tool is one of the important components of a CNC machine tool, mainly including the support of the spindle and the transmission parts installed on the spindle. Since the automatic speed change, accurate stop and automatic tool change of the spindle all affect the automation level of the machine tool, the spindle system of the CNC milling machine processing center is required to have good rigidity, thermal stability, shock resistance and precision retention.

[0003] It is found in existing equipment that when the driving mechanism drives the milling cutter to process the tool, the milling cutter may cause excessive load on the tool at an excessively high cutting speed or an excessively large feed speed, causing the tool to get stuck. At this time, the motor passes the overload protection and stops the motor to prevent further damage. However, when the overload protection in the motor fails and the milling cutter is stuck in the tool being processed, the motor is subjected to a load exceeding its rated load, which causes damage to the motor, thereby affecting the processing efficiency of the device on the tool.

[0004] In view of this, the present invention proposes a precision driving mechanism for tool processing to solve the above problems. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a precision drive mechanism for tool processing, which solves the technical problem that when the overload protection in the motor fails and the milling cutter is stuck in the tool being processed, the motor is subjected to a load exceeding its rated load, causing damage to the motor, thereby affecting the processing efficiency of the device on the tool.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] The technical solution adopted by the present invention to solve its technical problems is a precision driving mechanism for tool processing, comprising a shell, the shell comprising a support seat, and a sleeve is fixedly installed on the top end of the support seat, the driving structure is fixedly installed inside the sleeve, the driving structure comprises a support frame, and the support frame is fixedly installed inside the sleeve, a motor is fixedly installed on the top end of the support frame, and a driving unit is fixedly installed on one end of the rotating output shaft of the motor, the driving unit comprises a circular plate, and the circular plate is fixedly installed on the rotating output shaft of the motor, a limiting plate b is fixedly installed inside the sleeve, and a rotating shaft is inserted inside the limiting plate b, a hollow gear is fixedly installed on the outer side of the circular plate, a circular gear a is fixedly installed on one end of the rotating shaft, a gear member a is fixedly installed on the outer side of the rotating shaft, a gear member b is inserted inside the sleeve, a milling cutter is inserted inside the sleeve, an elastic unit a is fixedly installed on the outer side of the gear member b, a limiting plate a is fixedly installed inside the sleeve, a sliding plate is sleeved on the outer side of the rotating shaft, and the limiting plate a is sleeved on the outer side of the rotating shaft;

[0008] The support unit is inserted into the interior of the sliding plate and is used to limit the position of the sliding plate.

[0009] Preferably, the gear part a includes a circular gear b, and the circular gear b is fixedly mounted on the outside of the rotating shaft, and a left bevel is provided on the outside of the teeth of the circular gear b. The gear part b includes a circular gear c, and the circular gear c is sleeved on the outside of the milling cutter, and a right bevel is provided on the outside of the teeth of the circular gear c, and the left bevel is adapted to the right bevel.

[0010] Preferably, the support unit includes a screw rod, and the screw rod is inserted inside the sliding plate, a round block is fixedly installed at one end of the support unit, a circular gear d is fixedly installed at the other end of the screw rod, and a circular gear e is sleeved on the outer side of the milling cutter.

[0011] Preferably, the screw rod is meshed with the sliding plate through threads, and the screw rod is inserted into the inside of the limit plate a, the limit plate b is provided with a rotation groove adapted to the round block, and the circular gear d is meshed with the circular gear e through teeth.

[0012] Preferably, four groups of the screw rods, round blocks and circular gears d are arranged at equal distances, and the four groups of the screw rods, round blocks and circular gears d are distributed in an array around the central axis of the sliding plate.

[0013] Preferably, a hole adapted to the milling cutter is opened inside the circular gear e, and the milling cutter passes through the circular gear e and contacts the outer side of the sliding plate.

[0014] Preferably, a limiting ring is fixedly mounted on the outer side of the circular gear e, and a rotation groove matched with the limiting ring is provided inside the limiting plate a.

[0015] Preferably, the cross section of the limiting ring is in a "T" shape.

[0016] Preferably, the elastic unit a comprises a telescopic rod a, and the telescopic rod a is fixedly mounted on the outside of the gear member b, a spring a is sleeved on the outside of the telescopic rod a, and the other end of the telescopic rod a is fixedly mounted on the outside of the circular gear e.

[0017] Preferably, an elastic unit b is fixedly installed on the outer side of the limiting plate b, and the elastic unit b includes a telescopic rod b, and the telescopic rod b is fixedly installed on the outer side of the limiting plate b, and the other end of the telescopic rod b is fixedly installed on the outer side of the sliding plate, and a spring b is sleeved on the outer side of the telescopic rod b.

[0018] The beneficial effects of the present invention are:

[0019] (1) In the present invention, when the milling cutter is stuck in the required processing tool, the feeding mechanism in the CNC machine tool continuously drives the device to squeeze the tool, and the milling cutter squeezes the circular gear c, so that the teeth of the circular gear c and the teeth of the circular gear b are misaligned, thereby avoiding the overload protection device inside the motor from being damaged by a load exceeding its rated load when a failure occurs, thereby improving the service life of the device.

[0020] (2) In the present invention, the milling cutter squeezes the sliding plate to cause the screw to rotate in the opposite direction. When the circular gear d and the circular gear e are threadedly engaged, the circular gear e drives the milling cutter to rotate in the opposite direction inside the tool, causing the milling cutter to be stuck in the tool and loosen, so as to facilitate subsequent processing of the tool by the milling cutter.

[0021] (3) In the present invention, the threaded engagement between the screw and the sliding plate causes the sliding plate to slide to the threaded portion of the screw that is not present on the outside, so that the milling cutter is inserted into the inner dimension of the sleeve in a limited state, thereby improving the stability of the milling cutter in performing cutting processing on the desired processing tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a front perspective schematic diagram of the structure of the present invention;

[0023] Figure 2 It is a schematic top view of the structure of the present invention;

[0024] Figure 3 For the present invention Figure 2 Schematic diagram of the AA section structure;

[0025] Figure 4 For the present invention Figure 2 Schematic diagram of the structure of the middle BB section;

[0026] Figure 5It is a schematic structural perspective view of the roller motor and the milling cutter of the present invention;

[0027] Figure 6 For the present invention Figure 5 A side view schematic diagram of

[0028] Figure 7 It is a bottom-up stereoscopic schematic diagram of the structure of the hollow gear and the milling cutter of the present invention;

[0029] Figure 8 It is an exploded perspective schematic diagram of the structure of the gear member a and the circular gear d of the present invention;

[0030] Fig. 9 The exploded perspective view of the structure of the milling cutter and the sliding plate of the present invention

[0031] Fig.10 The structure of the limiting plate b and the limiting plate a of the present invention is a front view stereoscopic schematic diagram

[0032] Fig.11 For the present invention Fig.10 Exploded three-dimensional schematic diagram of the structure in front view and partial section

[0033] Fig.12 Schematic diagram of the exploded structure of the limit plate b and the sliding plate of the present invention

[0034] Fig.13 It is a front perspective schematic diagram of the structure of the circular gear d and the circular gear e of the present invention.

[0035] In the figure:

[0036] 1. Shell;

[0037] 110, support seat; 120, sleeve; 130, heat dissipation hole;

[0038] 2. Driving structure;

[0039] 210, support frame; 220, motor; 230, drive unit; 240, milling cutter; 250, elastic unit a; 260, support unit; 270, elastic unit b; 280, limit plate a; 290, sliding plate;

[0040] 231, circular plate; 232, limiting plate b; 233, rotating shaft; 234, hollow gear; 235, circular gear a; 236, gear member a; 237, gear member b;

[0041] 2361, circular gear b; 2362, left bevel;

[0042] 2371, circular gear c; 2372, right bevel;

[0043] 251, telescopic rod a; 252, spring a;

[0044] 261, screw rod; 262, round block; 263, circular gear d; 264, circular gear e;

[0045] 271, telescopic rod b; 272, spring b;

[0046] 3. Limiting ring. DETAILED DESCRIPTION

[0047] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0048] Example 1

[0049] like Figures 1 to 9 ,as well as Fig.13 As shown, a precision drive mechanism for tool processing of the present invention comprises a housing 1, the housing 1 comprises a support seat 110, and a sleeve 120 is fixedly mounted on the top of the support seat 110, a heat dissipation hole 130 is opened inside the sleeve 120, and a drive structure 2 is fixedly mounted inside the sleeve 120;

[0050] The driving structure 2 includes a support frame 210, and the support frame 210 is fixedly installed inside the sleeve 120, a motor 220 is fixedly installed on the top of the support frame 210, and a driving unit 230 is fixedly installed on one end of the rotating output shaft of the motor 220;

[0051] The driving unit 230 includes a circular plate 231, and the circular plate 231 is fixedly installed on the rotating output shaft of the motor 220, a limit plate b232 is fixedly installed inside the sleeve 120, and a rotating shaft 233 is inserted inside the limit plate b232, a hollow gear 234 is fixedly installed on the outer side of the circular plate 231, a circular gear a235 is fixedly installed on one end of the rotating shaft 233, the circular gear a235 is located on one side of the circular plate 231 and meshes with the hollow gear 234 through teeth, a gear member a236 is fixedly installed on the outer side of the rotating shaft 233, a gear member b237 is inserted inside the sleeve 120, and the gear member b237 is located on the outer side of the gear member a236 and meshes with the gear member a236 through teeth;

[0052] A milling cutter 240 is inserted into the sleeve 120, an elastic unit a250 is fixedly installed on the outer side of the gear member b237, a limit plate a280 is fixedly installed inside the sleeve 120, and the limit plate a280 is sleeved on the outer side of the rotating shaft 233, a sliding plate 290 is sleeved on the outer side of the rotating shaft 233, and the sliding plate 290 is inserted into the sleeve 120, the limit plate a280 is sleeved on the outer side of the rotating shaft 233, the limit plate a280 is located between the sliding plate 290 and the gear member a236, a hole matching the outer side of one end of the milling cutter 240 is opened inside the gear member b237, and the milling cutter 240 passes through the gear member b237 and contacts the outer side of the sliding plate 290;

[0053] Four groups of rotating shafts 233, hollow gears 234 and gear members a236 are arranged at equal distances, and the four groups of rotating shafts 233, hollow gears 234 and gear members a236 are distributed in an array around the central axis of the circular plate 231;

[0054] The support unit 260 is inserted into the interior of the sliding plate 290, and the support unit 260 is used to limit the position of the sliding plate 290. The gear part a236 includes a circular gear b2361, and the circular gear b2361 is fixedly mounted on the outside of the rotating shaft 233. A left bevel 2362 is arranged on the outer side of the teeth of the circular gear b2361. The gear part b237 includes a circular gear c2371, and the circular gear c2371 is sleeved on the outer side of the milling cutter 240. A right bevel 2372 is arranged on the outer side of the teeth of the circular gear c2371. The left bevel 2362 is adapted to the right bevel 2372.

[0055] In this embodiment, the heat dissipation hole 130 opened inside the sleeve 120 is used to facilitate the heat generated by the motor 220 to be dredged, and the circular gear d263 is meshed with the circular gear e264, so that the circular gear e264 drives the milling cutter 240 to perform cutting processing on the tool. When the milling cutter 240 is stuck in the required processing tool, and the CNC machine tool feed mechanism continues to drive the device to squeeze the tool, at this moment, the milling cutter 240 squeezes the circular gear c2371, so that the teeth of the circular gear c2371 are The teeth of the circular gear b2361 are misaligned, so that the circular gear b2361 follows the rotating shaft 233 in normal rotation, thereby preventing the overload protection device inside the motor 220 from malfunctioning, causing the motor 220 to be damaged by a load exceeding its rated load, thereby increasing the service life of the device, and through the cooperation between the left bevel 2362 and the right bevel 2372, the meshing efficiency of the circular gear b2361 and the circular gear c2371 is improved, thereby improving the efficiency of the device for tool processing.

[0056] Example 2

[0057] like Figure 3 , Figure 5 , Figure 8 , Fig.10 and Fig.11 As shown, on the basis of Example 1, the support unit 260 includes a screw rod 261, and the screw rod 261 is inserted into the interior of the sliding plate 290, and the outer part of one end of the screw rod 261 does not have a thread, a round block 262 is fixedly installed at one end of the support unit 260, and a circular gear d263 is fixedly installed at the other end of the screw rod 261, and the circular gear d263 is located between the limit plate a280 and the gear member a236, and a circular gear e264 is sleeved on the outer side of the milling cutter 240, and the screw rod 261 is meshed with the sliding plate 290 through a thread, and the screw rod 261 is inserted Inside the limit plate a280, a rotating groove matching the round block 262 is opened inside the limit plate b232, and the circular gear d263 is meshed with the circular gear e264 through teeth. Four groups of screw rods 261, round blocks 262 and circular gears d263 are arranged at equal distances. The four groups of screw rods 261, round blocks 262 and circular gears d263 are distributed in an array with the central axis of the sliding plate 290. A hole matching the milling cutter 240 is opened inside the circular gear e264, and the milling cutter 240 passes through the circular gear e264 and contacts the outer side of the sliding plate 290.

[0058] In this embodiment, when the milling cutter 240 is stuck in the required processing tool, and the mechanism in the CNC machine tool continues to drive the device to squeeze the tool, the milling cutter 240 squeezes the sliding plate 290. At this moment, the sliding plate 290 and the screw rod 261 are meshed through the thread, so that the screw rod 261 rotates in the opposite direction inside the limit plate b232 and the sliding plate 290 through the round block 262, and the screw rod 261 drives the circular gear e264 to rotate in the opposite direction through the circular gear d263, so that the circular gear e264 drives the milling cutter 240 in the opposite direction inside the tool. Rotate to loosen the milling cutter 240 stuck in the tool, so as to facilitate the subsequent processing of the tool by the milling cutter 240, and when the milling cutter 240 drives the circular gear e264 to engage with the circular gear d263, the screw rod 261 is engaged with the sliding plate 290 through the thread, so that the sliding plate 290 slides to the thread that is not available on the outside of the screw rod 261. At this moment, the sliding plate 290 is in a stable state on the outside of the screw rod 261, and the sliding plate 290 conflicts with one end of the milling cutter 240, so that the internal size of the milling cutter 240 inserted into the sleeve 120 is in a limited state.

[0059] Example 3

[0060] like Fig. 9 and Fig.11 As shown, on the basis of Example 1, a limit ring 3 is fixedly installed on the outer side of the circular gear e264, and a rotation groove matched with the limit ring 3 is opened inside the limit plate a280, and the cross-section of the limit ring 3 is a "T" shaped structure.

[0061] In this embodiment, through the "T" shape structure of the limit ring 3, the limit ring 3 is stably installed inside the limit plate a280, so that the circular gear e264 can rotate on the outside of the limit plate a280 through the limit ring 3. Therefore, the limit ring 3 plays a limiting role on the circular gear e264, thereby avoiding the misalignment of the circular gear e264 and the circular gear d263, thereby improving the stability of the meshing of the circular gear e264 and the circular gear d263.

[0062] Example 4

[0063] like Figure 3 and Figure 8 As shown, on the basis of Example 1, the elastic unit a250 includes a telescopic rod a251, and the telescopic rod a251 is fixedly installed on the outside of the gear part b237, and a spring a252 is sleeved on the outside of the telescopic rod a251, and the other end of the telescopic rod a251 is fixedly installed on the outside of the circular gear e264, and the telescopic rod a251 and the spring a252 are located between the gear part b237 and the circular gear e264. Four groups of telescopic rods a251 and springs a252 are arranged at equal distances, and the four groups of telescopic rods a251 and springs a252 are distributed in an array with the central axis of the limit plate a280.

[0064] In this embodiment, when the milling cutter 240 is separated from the interior of the required processing tool, the supporting force of the screw rod 261 and the elastic force of the round block 262 cause the gear part b237 to slide on the outside of the milling cutter 240 close to the inner wall direction of the sleeve 120, and the left bevel 2362 and the right bevel 2372 contact each other, so that the circular gear b2361 and the circular gear c2371 are re-engaged, so that the circular gear c2371 can drive the milling cutter 240 to cut the required processing tool.

[0065] Example 5

[0066] like Fig.10 - Fig.12 As shown, on the basis of Example 1, an elastic unit b270 is fixedly installed on the outer side of the limit plate b232, and the elastic unit b270 includes a telescopic rod b271, and the telescopic rod b271 is fixedly installed on the outer side of the limit plate b232, and the other end of the telescopic rod b271 is fixedly installed on the outer side of the sliding plate 290, and a spring b272 is sleeved on the outer side of the telescopic rod b271.

[0067] In this embodiment, when the milling cutter 240 is separated from the interior of the required processing tool, the sliding plate 290 slides on the outside of the rotating shaft 233 through the supporting force of the telescopic rod b271 and the elastic force of the spring b272, and the sliding plate 290 squeezes the milling cutter 240, thereby causing the milling cutter 240 to extend outward inside the sleeve 120, so that the milling cutter 240 can cut the required processing tool normally.

[0068] Working principle: the user connects the device to an external power source and then turns on the switch. The limit plate b232 and the limit plate a280 limit the rotating shaft 233, and the support frame 210 supports the motor 220. Then the motor 220 is started, and the rotating output shaft of the motor 220 drives the circular plate 231 and the hollow gear 234 to rotate. At this moment, the hollow gear 234 and the circular gear a235 are meshed through the teeth, so that the circular gear a235 drives the circular gear b2361 to rotate through the rotating shaft 233. At this moment, the circular gear b2361 and the circular gear c2371 are meshed through the teeth, so that the circular gear c2371 drives the milling cutter 240 to rotate, and At the same time, when the milling cutter 240 drives the circular gear e264 to mesh with the circular gear d263, and the circular gear e264 rotates inside the sliding plate 290 through the limiting ring 3, and the screw rod 261 follows the rotation of the circular gear d263 to mesh with the sliding plate 290 through the thread, so that the sliding plate 290 slides to the thread that is not available on the outside of the screw rod 261. At this moment, the sliding plate 290 is in a stable state on the outside of the screw rod 261, and the sliding plate 290 conflicts with one end of the milling cutter 240, so that the internal size of the milling cutter 240 inserted into the sleeve 120 is in a limited state, so the milling cutter 240 performs cutting processing on the required processing tool, and when the milling cutter 240 is stuck in the required When the tool needs to be processed, and the mechanism in the CNC machine tool continuously drives the device to squeeze the tool, at this moment, the milling cutter 240 squeezes the circular gear c2371, causing the teeth of the circular gear c2371 to be misaligned with the teeth of the circular gear b2361, and at the same time, the milling cutter 240 squeezes the sliding plate 290. At this moment, the sliding plate 290 and the screw rod 261 are meshed through threads, causing the screw rod 261 to rotate in the opposite direction inside the limit plate b232 and the sliding plate 290 through the round block 262, and the screw rod 261 drives the circular gear e264 to rotate in the opposite direction through the circular gear d263, thereby causing the circular gear e264 to drive the milling cutter 240 to rotate in the opposite direction inside the tool. , so that the milling cutter 240 is stuck in the tool and loosens. When the milling cutter 240 is separated from the interior of the required processing tool, the sliding plate 290 slides on the outside of the rotating shaft 233 through the supporting force of the telescopic rod b271 and the elastic force of the spring b272, and the sliding plate 290 squeezes the milling cutter 240, thereby causing the milling cutter 240 to extend outward inside the sleeve 120, and the supporting force of the screw rod 261 and the elastic force of the round block 262 cause the gear part b237 to slide on the outside of the milling cutter 240 close to the inner wall of the sleeve 120, and through the mutual contact between the left bevel 2362 and the right bevel 2372, the circular gear b2361 and the circular gear c2371 are re-engaged.

[0069] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A precision drive mechanism for tool processing, comprising a housing (1), the housing (1) comprising a support seat (110), and a sleeve (120) is fixedly mounted on the top end of the support seat (110), characterized in that: Also includes: A driving structure (2), wherein the driving structure (2) is fixedly mounted inside the sleeve (120); The driving structure (2) comprises a support frame (210), and the support frame (210) is fixedly mounted inside the sleeve (120), a motor (220) is fixedly mounted on the top end of the support frame (210), and a driving unit (230) is fixedly mounted on one end of a rotation output shaft of the motor (220); The driving unit (230) comprises a circular plate (231), and the circular plate (231) is fixedly mounted on the rotating output shaft of the motor (220); a limit plate b (232) is fixedly mounted inside the sleeve (120), and a rotating shaft (233) is inserted inside the limit plate b (232); a hollow gear (234) is fixedly mounted on the outside of the circular plate (231); a circular gear a (235) is fixedly mounted on one end of the rotating shaft (233); a gear member a (236) is fixedly mounted on the outside of the rotating shaft (233); and a gear member b (237) is inserted inside the sleeve (120); A milling cutter (240) is inserted into the sleeve (120), an elastic unit a (250) is fixedly installed on the outside of the gear member b (237), a limit plate a (280) is fixedly installed inside the sleeve (120), a sliding plate (290) is sleeved on the outside of the rotating shaft (233), and the limit plate a (280) is sleeved on the outside of the rotating shaft (233); A support unit (260), wherein the support unit (260) is inserted into the interior of the sliding plate (290), and the support unit (260) is used to limit the position of the sliding plate (290); The gear member a (236) comprises a circular gear b (2361), and the circular gear b (2361) is fixedly mounted on the outside of the rotating shaft (233), and a left bevel (2362) is arranged on the outside of the teeth of the circular gear b (2361); the gear member b (237) comprises a circular gear c (2371), and the circular gear c (2371) is sleeved on the outside of the milling cutter (240), and a right bevel (2372) is arranged on the outside of the teeth of the circular gear c (2371), and the left bevel (2362) is matched with the right bevel (2372); The support unit (260) comprises a screw rod (261), and the screw rod (261) is inserted into the interior of the sliding plate (290); a round block (262) is fixedly mounted on one end of the support unit (260); a circular gear d (263) is fixedly mounted on the other end of the screw rod (261); and a circular gear e (264) is sleeved on the outer side of the milling cutter (240); The screw rod (261) is meshed with the sliding plate (290) via a thread, and the screw rod (261) is inserted into the interior of the limiting plate a (280), a rotation groove matching the round block (262) is provided inside the limiting plate b (232), and the circular gear d (263) is meshed with the circular gear e (264) via teeth; Four groups of the screw rod (261), the round block (262) and the circular gear d (263) are arranged at equal distances, and the four groups of the screw rod (261), the round block (262) and the circular gear d (263) are distributed in an array around the central axis of the sliding plate (290).

2. A precision drive mechanism for tool processing according to claim 1, characterized in that: A hole matching the milling cutter (240) is provided inside the circular gear e (264); the milling cutter (240) passes through the circular gear e (264) and contacts the outer side of the sliding plate (290).

3. The precision drive mechanism for tool processing according to claim 1, characterized in that: A limit ring (3) is fixedly mounted on the outer side of the circular gear e (264), and a rotation groove matching the limit ring (3) is provided inside the limit plate a (280).

4. A precision drive mechanism for tool processing according to claim 3, characterized in that: The cross section of the limiting ring (3) presents a "T"-shaped structure.

5. The precision drive mechanism for tool processing according to claim 1, characterized in that: The elastic unit a (250) comprises a telescopic rod a (251), and the telescopic rod a (251) is fixedly mounted on the outside of the gear member b (237), a spring a (252) is sleeved on the outside of the telescopic rod a (251), and the other end of the telescopic rod a (251) is fixedly mounted on the outside of the circular gear e (264).

6. A precision drive mechanism for tool processing according to claim 1, characterized in that: An elastic unit b (270) is fixedly mounted on the outer side of the limit plate b (232), and the elastic unit b (270) comprises a telescopic rod b (271), and the telescopic rod b (271) is fixedly mounted on the outer side of the limit plate b (232), and the other end of the telescopic rod b (271) is fixedly mounted on the outer side of the sliding plate (290), and a spring b (272) is sleeved on the outer side of the telescopic rod b (271).

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