Auxiliary driving device of numerical control machine tool

Abstract

The invention relates to the technical field of numerically-controlled machine tools, and discloses a numerically-controlled machine tool auxiliary driving device which comprises a mounting unit, a transmission unit and a clamping unit, the mounting unit comprises a numerically-controlled machine tool body, two symmetrical protective shells are arranged above the numerically-controlled machine tool body, and universal wheels are arranged on the periphery of the bottom of the numerically-controlled machine tool body; a control panel and a circular mounting ring are respectively arranged on the two protective shells, and the circular mounting ring is rotationally connected to the protective shells. According to the device, the driving assembly drives the circular mounting ring to rotate, and meanwhile, the driving assembly drives the four moving plates to be close to each other when rotating along with the circular mounting ring, so that the mounting rods can be pressed on the circular mounting plate when the moving plates move, and the circular mounting plate cannot move; and therefore, the connecting rod mounted at the bottom of the circular mounting plate drives the clamping plate to clamp and correct the primarily limited cylindrical workpiece.

Description

Technical Field

[0001] The invention belongs to the technical field of numerically controlled machine tools, and in particular relates to an auxiliary driving device for numerically controlled machine tools. Background Art

[0002] CNC machine tool is the abbreviation of digital control machine tool. It is an automated machine tool equipped with a program control system. The control system can logically process programs specified by control codes or other symbolic instructions, decode them, express them in coded numbers, input them into the CNC device through information carriers, and after calculation and processing, the CNC device sends out various control signals to control the movement of the machine tool and automatically process parts according to the shape and size required by the drawing.

[0003] However, when the existing CNC machine tools are in use, the staff is often required to individually clamp the cylindrical workpieces to be processed, so as to ensure that the cylindrical workpieces can be rotated. However, it is often troublesome to individually clamp the cylindrical workpieces during use, and the processing efficiency is low.

[0004] In view of this, the present invention is proposed. Summary of the invention

[0005] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is:

[0006] An auxiliary drive device for a numerically controlled machine tool comprises a mounting unit, a transmission unit and a clamping unit, wherein the mounting unit comprises a numerically controlled machine tool body, two mutually symmetrical protective shells are arranged above the numerically controlled machine tool body, universal wheels are arranged around the bottom of the numerically controlled machine tool body, a control panel and a circular mounting ring are arranged on the two protective shells respectively, the circular mounting rings are rotatably connected to the protective shells, and a side wall of the circular mounting ring located in the inner cavity of the protective shell is provided with four rectangular notches arranged in a circumferential distribution;

[0007] The clamping unit comprises four movable plates, one ends of the four movable plates are movably inserted into the rectangular slots, the four movable plates are respectively fixedly mounted with mounting rods at the bottom of the inner cavity of the circular mounting ring, the four mounting rods are respectively plugged with circular placement tubes, and clamping rods are respectively fixedly mounted on both sides of the four circular placement tubes, each of the clamping rods is respectively fixedly connected to the inner wall of the circular placement tube, the inner cavities of the four circular placement tubes are provided with circular mounting plates, the bottoms of the four circular mounting plates are fixedly mounted with connecting rods, the four connecting rods movably penetrate the circular placement tubes, the other ends of the four connecting rods are respectively fixedly mounted with clamping plates, and reset springs are fixedly mounted above the four circular mounting plates, and the other ends of the reset springs are fixedly connected to the top of the inner cavity of the circular placement tube;

[0008] The transmission unit comprises a driving assembly, and the driving assembly is used to drive the circular mounting ring to rotate, and the driving assembly can also be used to drive the moving plate to move.

[0009] As a preferred embodiment of the present invention, the drive assembly includes a servo motor, which is arranged in the inner cavity of the protective shell, and a threaded rod is fixedly installed on the output end of the servo motor, and a threaded sleeve is meshedly installed on the threaded rod, and four guide rods distributed in a circle are movably penetrated through the threaded sleeve, one end of the four guide rods is fixedly connected to the inner wall of the protective shell, and four connecting rods distributed in a circle are also fixedly installed on a side wall of the threaded sleeve away from the servo motor.

[0010] As a preferred embodiment of the present invention, the end of the threaded rod away from the servo motor is fixedly connected to a telescopic rod, and the end of the telescopic rod away from the threaded rod is fixedly connected to a rectangular mounting tube, a circular slide groove is provided on the outer wall of the rectangular mounting tube, and four guide sliders distributed in a circle are slidably installed in the inner cavity of the circular slide groove.

[0011] As a preferred embodiment of the present invention, the four guide sliders are respectively fixedly connected to a positioning rod at one end away from the circular slide groove, one side wall of the four positioning rods is fixedly connected to a guide rod, and one side wall of the four guide sliders is fixedly connected to a connecting rod.

[0012] As a preferred embodiment of the present invention, four placement slots distributed in a circular pattern are provided on the rectangular mounting cylinder, and mutually symmetrical bearings are provided on opposite side walls of the inner cavity of the four placement slots, and a rotating rod is provided on the opposite side of each bearing, and a flip rod is fixedly connected to the opposite end of each rotating rod, and a torsion spring is provided on each rotating rod, and the two ends of each torsion spring are respectively provided on the bearing and the flip rod.

[0013] As a preferred embodiment of the present invention, the outer side walls of the rectangular mounting cylinder are fixedly installed with limit rods on both sides of the placement slot, and limit blocks are installed between each of the limit rods. One side wall of the four limit blocks is respectively fitted with a flip rod, and the other end of each flip rod is respectively fitted and connected with a movable plate.

[0014] As a preferred embodiment of the present invention, a rectangular plug-in rod is inserted into the end of the rectangular mounting tube away from the servo motor, and flip rods are respectively arranged on the four sides of the rectangular mounting tube. The rectangular plug-in rods are respectively fixedly connected with a circular placement plate at one end away from the servo motor, and the circular placement plate is fixedly connected with four fixing rods distributed in a circle at one end away from the servo motor, and the other ends of the four fixing rods are fixedly connected to the circular mounting ring.

[0015] As a preferred embodiment of the present invention, one side wall of the inner cavity of the circular mounting ring is provided with a plurality of first slide grooves which are symmetrical to each other in pairs, and each of the first slide grooves is distributed circumferentially between each other, and a first slider is slidably installed in the inner cavity of each first slide groove, and each of the first sliders is symmetrical to each other in pairs, and a movable plate is fixedly connected to one end of each of the first sliders which is away from the first slide groove.

[0016] As a preferred embodiment of the present invention, the four circular placing cylinder cavities are each provided with four second slide grooves distributed in a circular pattern, each of the second slide grooves is slidably installed with a second slider, and each of the second sliders is located on the two opposite side walls of the circular placing cylinder cavity and is provided with a circular mounting plate.

[0017] As a preferred embodiment of the present invention, a circular movable plate is fitted on one side wall of the circular placing plate away from the servo motor, and four sleeve rods distributed in a circle are fixedly installed on the side wall of the circular movable plate, and the four sleeve rods are respectively sleeved on the fixed rods, and four movable rods distributed in a circle are also movably installed on the side wall of the circular movable plate, and the other ends of the four movable rods are respectively movably connected to the movable plate.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The present invention can drive the circular mounting ring to rotate through the driving assembly, and can also drive the four movable plates to move closer to each other when following the rotation of the circular mounting ring through the driving assembly, so that when the movable plate moves, the mounting rod can be pressed on the circular mounting plate, making the circular mounting plate unable to move, so that the connecting rod installed at the bottom of the circular mounting plate drives the clamping plate to clamp and correct the cylindrical workpiece that has been initially limited.

[0020] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In the attached picture:

[0022] Figure 1 It is a three-dimensional structural schematic diagram of an auxiliary drive device for a CNC machine tool;

[0023] Figure 2 It is a schematic diagram of the structure of a partial protective shell of an auxiliary drive device of a CNC machine tool;

[0024] Figure 3 It is a schematic diagram of the cross-sectional structure of a partial protective shell of an auxiliary drive device of a CNC machine tool;

[0025] Figure 4 It is a schematic diagram of the inner cavity structure of a partial protective shell of an auxiliary drive device of a CNC machine tool;

[0026] Figure 5 It is a side view structural diagram of a transmission unit of an auxiliary drive device for a CNC machine tool;

[0027] Figure 6 A CNC machine tool auxiliary drive device Figure 5 The enlarged structural diagram at A in the middle;

[0028] Figure 7 It is a schematic diagram of the cross-sectional structure of a circular mounting ring of an auxiliary drive device for a CNC machine tool;

[0029] Figure 8 A schematic diagram of the inner cavity structure of a circular mounting ring of an auxiliary drive device for a CNC machine tool;

[0030] Fig. 9 A CNC machine tool auxiliary drive device Figure 8 Enlarged structural diagram at B in the middle.

[0031] In the figure:

[0032] 100, mounting unit; 101, CNC machine tool body; 1011, universal wheel; 1012, protective shell; 1013, control panel; 102, circular mounting ring; 1021, rectangular notch;

[0033] 200, transmission unit; 201, servo motor; 2011, threaded rod; 2012, telescopic rod; 2013, threaded sleeve; 2014, guide rod; 2015, connecting rod; 202, rectangular mounting tube; 2021, circular slide groove; 2022, guide slider; 2023, positioning rod; 2024, placement notch; 2025, rectangular plug-in rod; 2026, circular placement plate; 203, limit block; 2031, limit rod; 204, bearing; 2041, rotating rod; 2042, torsion spring;

[0034] 300, clamping unit; 301, clamping plate; 302, flip rod; 3021, moving plate; 3022, first slide groove; 3023, first slider; 303, circular placement cylinder; 3031, mounting rod; 3032, return spring; 3033, circular mounting plate; 3034, second slide groove; 3035, second slider; 3036, clamping rod; 3037, connecting rod; 304, circular moving disk; 3041, fixing rod; 3042, sleeve rod; 3025, movable rod. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention.

[0036] Embodiment 1:

[0037] like Figures 1 to 9 As shown, an auxiliary drive device for a numerical control machine tool comprises an installation unit 100, a transmission unit 200 and a clamping unit 300, wherein the installation unit 100 comprises a numerical control machine tool body 101, two mutually symmetrical protective shells 1012 are arranged above the numerical control machine tool body 101, universal wheels 1011 are arranged around the bottom of the numerical control machine tool body 101, control panels 1013 and circular mounting rings 102 are arranged on the two protective shells 1012, respectively, the circular mounting rings 102 are rotatably connected to the protective shells 1012, and the circular mounting rings 102 are located on one side wall of the inner cavity of the protective shells 1012 and are provided with four rectangular notches 1021 arranged in a circumferential distribution; the clamping unit 300 comprises four movable plates 3021, one end of the four movable plates 3021 respectively movably penetrates the rectangular notches 1021, and the four movable plates 3021 are respectively fixedly installed with mounting rods 3 at the bottom of the inner cavity of the circular mounting rings 102. 031, four mounting rods 3031 are respectively inserted with circular placing cylinders 303, and clamping rods 3036 are respectively fixedly installed on both sides of the four circular placing cylinders 303, and each clamping rod 3036 is respectively fixedly connected to the inner wall of the circular placing cylinder 303, and the inner cavity of the four circular placing cylinders 303 is provided with a circular mounting plate 3033, and the bottom of the four circular mounting plates 3033 is fixedly installed with a connecting rod 3037, and the four connecting rods 3037 are movable through the circular placing cylinder 303, and the other ends of the four connecting rods 3037 are respectively fixedly installed with a clamping plate 301, and a reset spring 3032 is fixedly installed above the four circular mounting plates 3033, and the other end of the reset spring 3032 is fixedly connected to the top of the inner cavity of the circular placing cylinder 303; the transmission unit 200 includes a driving assembly, and the driving assembly is used to drive the circular mounting ring 102 to rotate, and the driving assembly can also be used to drive the movable plate 3021 to move. The circular mounting ring 102 can be driven to rotate by the driving assembly, and the four movable plates 3021 can also be driven by the driving assembly to move closer to each other as the circular mounting ring 102 rotates, so that when the movable plate 3021 moves, the mounting rod 3031 can be pressed on the circular mounting plate 3033, making the circular mounting plate 3033 unable to move, so that the connecting rod 3037 installed at the bottom of the circular mounting plate 3033 drives the clamping plate 301 to clamp and correct the cylindrical workpiece that has been initially limited.

[0038] like Figures 3 to 5As shown, in a specific embodiment, the drive assembly includes a servo motor 201, which is arranged in the inner cavity of the protective shell 1012, and a threaded rod 2011 is fixedly installed at the output end of the servo motor 201, and a threaded sleeve 2013 is meshedly installed on the threaded rod 2011, and four guide rods 2014 arranged in a circumferential distribution are movably penetrated on the threaded sleeve 2013, and one end of the four guide rods 2014 is fixedly connected to the inner wall of the protective shell 1012, and four connecting rods 2015 arranged in a circumferential distribution are also fixedly installed on a side wall of the threaded sleeve 2013 away from the servo motor 201. In this setting, the installation position and components of the drive assembly are determined.

[0039] like Figures 3 to 5 As shown, further, one end of the threaded rod 2011 away from the servo motor 201 is fixedly connected to a telescopic rod 2012, and one end of the telescopic rod 2012 away from the threaded rod 2011 is fixedly connected to a rectangular mounting tube 202, and a circular slide groove 2021 is provided on the outer wall of the rectangular mounting tube 202, and four guide sliders 2022 arranged in a circumferential distribution are slidably installed in the inner cavity of the circular slide groove 2021. In this arrangement, it is ensured that the telescopic rod 2012 can rotate, so that the telescopic rod 2012 can drive the rectangular mounting tube 202 to rotate.

[0040] like Figures 3 to 5 As shown, further, one end of the four guide sliders 2022 away from the circular chute 2021 is fixedly connected to the positioning rod 2023, one side wall of the four positioning rods 2023 is fixedly connected to the guide rod 2014, and one side wall of the four guide sliders 2022 is fixedly connected to the connecting rod 2015. In this configuration, it is ensured that when the threaded sleeve 2013 moves horizontally, it can drive the connecting rod 2015 to move, and when the connecting rod 2015 moves, it can push the guide slider 2022 to drive the rectangular installation tube 202 to move horizontally with the assistance of the circular chute 2021 and the rectangular installation tube 202 to rotate with the assistance of the telescopic rod 2012.

[0041] like Figures 3 to 8As shown, further, the rectangular installation cylinder 202 is provided with four placement slots 2024 arranged in a circumferential distribution, and the two opposite side walls of the inner cavity of the four placement slots 2024 are provided with mutually symmetrical bearings 204, and each bearing 204 is provided with a rotating rod 2041 on one side opposite to each other, and each rotating rod 2041 is fixedly connected with a flip rod 302 on one end opposite to each other, and each rotating rod 2041 is provided with a torsion spring 2042, and the two ends of each torsion spring 2042 are respectively arranged on the bearing 204 and the flip rod 302. The outer side wall of the rectangular installation cylinder 202 is respectively fixedly installed with a limit rod 2031 on both sides of the placement slot 2024, and a limit block 203 is installed between each limit rod 2031, and a flip rod 302 is respectively fitted on one side wall of the four limit blocks 203, and a moving plate 3021 is respectively fitted and connected to the other end of each flip rod 302. A rectangular plug rod 2025 is inserted into the end of the rectangular installation tube 202 away from the servo motor 201. The rectangular plug rod 2025 is located around the rectangular installation tube 202 and is fitted with flip rods 302. A circular placement plate 2026 is fixedly connected to the end of the rectangular plug rod 2025 away from the servo motor 201. Four fixed rods 3041 arranged in a circumferential distribution are fixedly connected to the end of the circular placement plate 2026 away from the servo motor 201. The other ends of the four fixed rods 3041 are fixedly connected to the circular installation ring 102. In this arrangement, it is ensured that when the rectangular installation tube 202 is in horizontal movement and rotation, it can move toward the side of the rectangular plug rod 2025 and drive the rectangular plug rod 2025 to rotate. When the rectangular installation tube 202 moves toward the side of the rectangular plug rod 2025, the rectangular plug rod 2025 can squeeze the flip rod 302 to rotate with the assistance of the rotating rod 2041.

[0042] Embodiment 2:

[0043] The difference between the above embodiment and this embodiment is that: Figures 7 and 8 As shown, an auxiliary drive device for a numerical control machine tool is provided, a plurality of mutually symmetrical first slide grooves 3022 are provided on one side wall of the inner cavity of the circular mounting ring 102, each of the first slide grooves 3022 is distributed in a circumferential manner, a first slider 3023 is slidably installed in the inner cavity of each first slide groove 3022, each of the first sliders 3023 is mutually symmetrical, and a moving plate 3021 is fixedly connected to one end of each first slider 3023 away from the first slide groove 3022. In this arrangement, it is ensured that when the flip rod 302 rotates with the assistance of the rotating rod 2041, it can squeeze the moving plate 3021 to move with the assistance of the first slide groove 3022 and the first slider 3023.

[0044] like Figures 7 to 9As shown, in a specific embodiment, the inner cavities of the four circular placement cylinders 303 are each provided with four second slide grooves 3034 arranged in a circumferential distribution, and the inner cavities of each second slide groove 3034 are slidably installed with a second slider 3035, and each second slider 3035 is respectively located on the two opposite side walls of the inner cavity of the circular placement cylinder 303 and is installed with a circular mounting plate 3033. In this arrangement, it is ensured that when the moving plate 3021 moves, it can drive the mounting rod 3031 installed at the bottom to move, so that when the mounting rod 3031 moves to a certain position, it can squeeze the circular mounting plate 3033 to move with the assistance of the second slide groove 3034 and the second slider 3035 until the circular mounting plate 3033 cannot move.

[0045] like Figures 7 and 8 As shown, further, a circular movable plate 304 is provided on one side wall of the circular placing plate 2026 away from the servo motor 201, and four sleeve rods 3042 arranged in a circumferential distribution are fixedly installed on the side wall of the circular movable plate 304, and the four sleeve rods 3042 are respectively sleeved on the fixed rod 3041, and four movable rods 3025 arranged in a circumferential distribution are also movably installed on the side wall of the circular movable plate 304, and the other ends of the four movable rods 3025 are respectively movably connected to the movable plate 3021. In this arrangement, it is ensured that when the movable plate 3021 moves, the circular movable plate 304 can be driven to move horizontally with the assistance of the sleeve rods 3042 and the fixed rod 3041 through the movable rods 3025, so that when the clamping plate 301 clamps the cylindrical workpiece, one side of the circular movable plate 304 is exactly fitted on the circular mounting ring 102.

[0046] The implementation principle of the auxiliary drive device for a CNC machine tool of this embodiment is as follows:

[0047] First, the staff places the cylindrical workpiece to be processed on the circular mounting ring 102 which is slidably mounted on one side wall of the protective shell 1012 provided on the CNC machine tool body 101 (when placing the cylindrical workpiece on the circular mounting ring 102, the staff lifts up the clamping plate 301 on the circular mounting ring 102 to place the cylindrical workpiece therein). When the workpiece is placed, the clamping plate 301 can initially clamp the cylindrical workpiece under the elastic force of the connecting rod 3037, the circular mounting plate 3033 and the return spring 3032.

[0048] At this time, the staff controls the servo motor 201 to operate through the control panel 1013 provided on another protective shell 1012. When the servo motor 201 operates, it can drive the threaded rod 2011 to rotate. When the threaded rod 2011 rotates, it can drive the threaded sleeve 2013 to move horizontally with the assistance of the guide rod 2014.

[0049] When the threaded sleeve 2013 moves horizontally, it can drive the connecting rod 2015 to move. When the connecting rod 2015 moves, it can push the guide slider 2022 to drive the rectangular installation cylinder 202 to move horizontally with the assistance of the circular slide groove 2021 and also allow the rectangular installation cylinder 202 to rotate with the assistance of the telescopic rod 2012 (because the telescopic rod 2012 is fixedly connected to the threaded rod 2011, and the other end of the telescopic rod 2012 is fixedly connected to the rectangular installation cylinder 202);

[0050] When the rectangular installation cylinder 202 is in horizontal movement and rotation, it can move toward the side of the rectangular plug rod 2025 and drive the rectangular plug rod 2025 to rotate. When the rectangular installation cylinder 202 moves toward the side of the rectangular plug rod 2025, the rectangular plug rod 2025 can squeeze the flip rod 302 to rotate with the assistance of the rotating rod 2041. When the rectangular plug rod 2025 rotates, it can drive the circular placement plate 2026 to drive the circular installation ring 102 to rotate through the fixed rod 3041. At the same time, because the flip rod 302 also rotates with the assistance of the rectangular installation cylinder 202, the flip rod 302 and the circular installation ring 102 can rotate in the same direction and at the same speed.

[0051] When the flip rod 302 rotates with the assistance of the rotating rod 2041, it will be able to squeeze the movable plate 3021 to move with the assistance of the first sliding groove 3022 and the first sliding block 3023. When the movable plate 3021 moves, it will be able to drive the mounting rod 3031 installed at the bottom to move, so that when the mounting rod 3031 moves to a certain position, it can squeeze the circular mounting plate 3033 to move with the assistance of the second sliding groove 3034 and the second sliding block 3035 until the circular mounting plate 3033 cannot move (when the circular mounting plate 3033 cannot move, the rectangular plug-in rod 2025 will squeeze the flip rod 302 with the assistance of the rotating rod 2041 so that one end of the flip rod 302 located in the rectangular mounting tube 202 fits around the rectangular plug-in rod 2025. Therefore, when the rectangular plug-in rod 2025 moves, it will not be able to drive the flip rod 302 to move The cylindrical workpiece is rotated), at this time, the connecting rod 3037 installed at the bottom of the circular mounting plate 3033 can drive the clamping plate 301 to clamp the placed cylindrical workpiece without loosening (because the initial servo motor 201 drives the threaded rod 2011 to rotate when it is just started, and the threaded rod 2011 rotates slowly at this time. When the threaded sleeve 2013 moves to a certain position, the clamping plate 301 will be able to clamp and limit the placed cylindrical workpiece, ensuring that the cylindrical workpiece will not fall off when the threaded rod 2011 rotates faster. When the speed is faster, the threaded sleeve 2013 continues to move, and the rectangular mounting cylinder 202 will be able to move on the rectangular plug-in rod 2025 until the cylindrical workpiece is processed. At this time, the threaded sleeve 2013 can still move on the threaded rod 2011);

[0052] When the movable plate 3021 moves, the circular movable disk 304 can be driven to move horizontally with the assistance of the sleeve rod 3042 and the fixed rod 3041 through the movable rod 3025. Therefore, when the clamping plate 301 clamps the cylindrical workpiece, one side of the circular movable disk 304 is exactly in contact with the circular mounting ring 102.

Claims

1. An auxiliary drive device for a numerically controlled machine tool, comprising a mounting unit (100), a transmission unit (200) and a clamping unit (300), characterized in that: The mounting unit (100) comprises a CNC machine tool body (101), two mutually symmetrical protective shells (1012) are arranged above the CNC machine tool body (101), universal wheels (1011) are arranged around the bottom of the CNC machine tool body (101), control panels (1013) and circular mounting rings (102) are arranged on the two protective shells (1012), the circular mounting rings (102) are rotatably connected to the protective shells (1012), and a side wall of the circular mounting ring (102) located in the inner cavity of the protective shell (1012) is provided with four rectangular notches (1021) distributed in a circumferential manner; The clamping unit (300) comprises four movable plates (3021), one end of each of the four movable plates (3021) is movably inserted into the rectangular slot (1021), the four movable plates (3021) are respectively fixedly mounted with mounting rods (3031) at the bottom of the inner cavity of the circular mounting ring (102), the four mounting rods (3031) are respectively plugged with circular placement tubes (303), and both sides of the four circular placement tubes (303) are respectively fixedly mounted with clamping rods (3036), and each of the clamping rods (3036) is respectively fixedly connected to the circular placement tube (303). The inner wall of the four circular placement cylinders (303) is provided with a circular mounting plate (3033) in the inner cavity, a connecting rod (3037) is fixedly installed at the bottom of the four circular mounting plates (3033), the four connecting rods (3037) are movably inserted into the circular placement cylinder (303), the other ends of the four connecting rods (3037) are respectively fixedly installed with a clamping plate (301), a reset spring (3032) is fixedly installed above the four circular mounting plates (3033), and the other end of the reset spring (3032) is fixedly connected to the upper part of the inner cavity of the circular placement cylinder (303); The transmission unit (200) comprises a driving assembly, wherein the driving assembly is used to drive the circular mounting ring (102) to rotate, and the driving assembly can also be used to drive the moving plate (3021) to move.

2. The auxiliary drive device for a CNC machine tool according to claim 1, characterized in that: The drive assembly comprises a servo motor (201), the servo motor (201) being arranged in an inner cavity of a protective shell (1012), a threaded rod (2011) being fixedly mounted on an output end of the servo motor (201), a threaded sleeve (2013) being meshedly mounted on the threaded rod (2011), four guide rods (2014) being movably penetrated by the threaded sleeve (2013) and being arranged in a circumferential distribution, one end of the four guide rods (2014) being fixedly connected to an inner wall of the protective shell (1012), and four connecting rods (2015) being arranged in a circumferential distribution are also fixedly mounted on a side wall of the threaded sleeve (2013) away from the servo motor (201).

3. The auxiliary drive device for a CNC machine tool according to claim 2, characterized in that: One end of the threaded rod (2011) away from the servo motor (201) is fixedly connected to a telescopic rod (2012), and one end of the telescopic rod (2012) away from the threaded rod (2011) is fixedly connected to a rectangular mounting tube (202). A circular slide groove (2021) is provided on the outer wall of the rectangular mounting tube (202), and four guide sliders (2022) distributed in a circumference are slidably mounted in the inner cavity of the circular slide groove (2021).

4. The auxiliary drive device for a CNC machine tool according to claim 3, characterized in that: One end of each of the four guide sliders (2022) away from the circular slide groove (2021) is fixedly connected to a positioning rod (2023), one side wall of the four positioning rods (2023) is fixedly connected to a guide rod (2014), and one side wall of the four guide sliders (2022) is fixedly connected to a connecting rod (2015).

5. The auxiliary drive device for a CNC machine tool according to claim 3, characterized in that: The rectangular installation cylinder (202) is provided with four placement slots (2024) distributed in a circumferential manner, and the opposite side walls of the inner cavity of the four placement slots (2024) are provided with bearings (204) that are symmetrical to each other, and each of the bearings (204) is provided with a rotating rod (2041) on one side opposite to each other, and each of the rotating rods (2041) is fixedly connected with a flip rod (302) on one end opposite to each other, and each of the rotating rods (2041) is provided with a torsion spring (2042), and the two ends of each torsion spring (2042) are respectively arranged on the bearing (204) and the flip rod (302).

6. The auxiliary drive device for a CNC machine tool according to claim 5, characterized in that: The outer side walls of the rectangular installation cylinder (202) are fixedly installed with limit rods (2031) on both sides of the placement slot (2024), and limit blocks (203) are installed between each of the limit rods (2031). A flip rod (302) is fitted on one side wall of the four limit blocks (203), and the other end of each flip rod (302) is fitted and connected to a movable plate (3021).

7. The auxiliary drive device for a CNC machine tool according to claim 6, characterized in that: A rectangular plug-in rod (2025) is plugged into one end of the rectangular installation tube (202) away from the servo motor (201); flip rods (302) are respectively arranged on the four sides of the rectangular installation tube (202); one end of the rectangular plug-in rod (2025) away from the servo motor (201) is fixedly connected to a circular placement plate (2026); one end of the circular placement plate (2026) away from the servo motor (201) is fixedly connected to four fixing rods (3041) arranged in a circumferential distribution; the other ends of the four fixing rods (3041) are fixedly connected to the circular installation ring (102).

8. The auxiliary drive device for a CNC machine tool according to claim 1, characterized in that: A plurality of first slide grooves (3022) are provided on one side wall of the inner cavity of the circular mounting ring (102), and each of the first slide grooves (3022) is distributed in a circular pattern. A first slider (3023) is slidably installed in the inner cavity of each first slide groove (3022), and each of the first sliders (3023) is symmetrical to each other. A movable plate (3021) is fixedly connected to one end of each of the first sliders (3023) away from the first slide groove (3022).

9. The auxiliary drive device for a CNC machine tool according to claim 1, characterized in that: The inner cavities of the four circular placement cylinders (303) are each provided with four second slide grooves (3034) distributed in a circumferential manner, and the inner cavity of each second slide groove (3034) is slidably installed with a second slider (3035), and each second slider (3035) is respectively located on the two opposite side walls of the inner cavity of the circular placement cylinder (303) and is installed with a circular mounting plate (3033).

10. The auxiliary drive device for a CNC machine tool according to claim 7, characterized in that: A circular movable plate (304) is fitted on a side wall of the circular placement plate (2026) away from the servo motor (201); four sleeve rods (3042) arranged in a circumferential distribution are fixedly installed on the side wall of the circular movable plate (304); the four sleeve rods (3042) are respectively sleeved on the fixed rods (3041); four movable rods (3025) arranged in a circumferential distribution are also movably installed on the side wall of the circular movable plate (304); the other ends of the four movable rods (3025) are respectively movably connected to the movable plate (3021).

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