CN112620746A

CN112620746A - Metal milling and carving device capable of prolonging service life of screw rod

Info

Publication number: CN112620746A
Application number: CN202011605621.4A
Authority: CN
Inventors: 李家冬
Original assignee: Shijiazhuang Hongpin Technology Co ltd
Current assignee: Shandong Kaiwo Machinery Co.,Ltd.
Priority date: 2020-12-30
Filing date: 2020-12-30
Publication date: 2021-04-09
Anticipated expiration: 2040-12-30
Also published as: CN112620746B

Abstract

The invention discloses a metal milling and carving device capable of prolonging the service life of a screw rod, which comprises a carving device shell, wherein a working cavity with an opening at the right side is arranged in the carving device shell, a lifting control assembly is arranged in the working cavity, the lifting control assembly comprises a toothed support which is arranged on the inner wall at the rear side of the working cavity and can slide up and down, and a lifting control cavity which is arranged on the inner wall at the left side of the working cavity and is communicated with the outside; and after the milling and carving work is finished, the chips at the upper end of the working cavity can be automatically removed, and the problem of unbalance caused when the next metal plate is placed is solved.

Description

Metal milling and carving device capable of prolonging service life of screw rod

Technical Field

The invention relates to the field of metal engraving, in particular to a metal milling and engraving device capable of prolonging the service life of a screw rod.

Background

The existing metal milling and carving equipment is usually realized by adopting the matching connection of a screw rod (a threaded shaft) and an internal thread sliding block when a milling cutter head moves left and right in advance. But because the lead screw can expose in operational environment, consequently often can produce the piece that produces after milling and pile up and lead to internal thread slider and lead to the lead screw cooperation to be connected on the lead screw, cause the mar etc. to lead to the fact lead screw and slider, influence the life of lead screw. Some devices adopt a blowing mode to remove scraps, but the effect is poor when the scraps are removed by long screw rods, and the device capable of solving the problems is disclosed by the invention.

Disclosure of Invention

The invention aims to solve the technical problem of providing a metal milling and carving device capable of prolonging the service life of a screw rod, and overcoming the problems.

The invention is realized by the following technical scheme.

The invention relates to a metal milling and carving device capable of prolonging the service life of a screw rod, which comprises a carving device shell, wherein a working cavity with an opening at the right side is arranged in the carving device shell, a lifting control assembly is arranged in the working cavity, the lifting control assembly comprises a toothed support which is arranged on the inner wall at the rear side of the working cavity and can slide up and down, a lifting control cavity which is arranged on the inner wall at the left side of the working cavity and is communicated with the outside, a first transmission shaft which is rotationally connected with the inner wall at the rear side of the lifting control cavity, a first gear which is fixedly arranged on the first transmission shaft and is meshed and connected with the toothed part at the left end of the toothed support, a milling and carving assembly is arranged at the right end of the toothed support, the milling and carving assembly comprises a supporting transverse plate which is fixedly arranged at the right end of the toothed support, a fixed support, the rotary milling machine is characterized in that the rotary milling machine is rotatably connected with a second transmission shaft extending up and down on the horizontal support, a tool bit support fixedly connected with the lower side of the horizontal support and the second transmission shaft is fixedly arranged at the lower end of the tool bit support, a milling tool bit embedded in a toothed support is arranged at the lower end of the tool bit support, a third transmission shaft extending rightwards is connected with the right end of the motor in a power mode, a threaded part of the third transmission shaft is in threaded connection with an internal thread part of the fixed support plate, and a cleaning assembly is further arranged in the working cavity.

Wherein, the lifting control assembly also comprises a first bevel gear which is fixedly arranged on the first transmission shaft and is positioned at the front side of the first gear, a matching support is fixedly arranged on the inner wall of the lower side of the lifting control cavity, the matching support is rotatably connected with a fourth transmission shaft which extends leftwards and rightwards, a second bevel gear which is meshed with the first bevel gear is fixedly arranged on the fourth transmission shaft positioned at the right side of the matching support, an adjusting hand wheel is fixedly arranged at the left end of the fourth transmission shaft, a spring support is fixedly arranged on the inner wall of the lower side of the lifting control cavity, a movable support which can slide leftwards and rightwards and is positioned between the spring support and the matching support is arranged on the inner wall of the lower side of the lifting control cavity, a reset spring is connected between the movable support and the spring support, and a fifth transmission shaft which is connected with the fourth transmission shaft, the outer surface of the fifth transmission shaft is fixedly provided with L-shaped supports in an up-down symmetrical mode, the left end of each L-shaped support is fixedly provided with a hook block, and the right end of the movable support is further fixedly provided with a limiting rack which can be matched with the toothed part at the left end of the toothed support.

The milling and carving assembly further comprises a main belt wheel fixedly arranged on the third transmission shaft, a rotating shaft support is fixedly arranged at the lower end of the supporting transverse plate, the right end of the toothed support is rotatably connected with a sixth transmission shaft extending to the left end of the rotating shaft support rightwards, an auxiliary belt wheel is fixedly arranged on the sixth transmission shaft, a connecting belt is connected between the auxiliary belt wheel and the main belt wheel, two vertical supports are fixedly arranged at the front end of the fixed support plate in a bilateral symmetry mode, the left side of the fixed support plate is rotatably connected with a seventh transmission shaft extending to the right side of the vertical support rightwards, the seventh transmission shaft is connected with the sixth transmission shaft through splines, a third bevel gear is fixedly arranged on the sixth transmission shaft, and a fourth bevel gear meshed with the third bevel gear is fixedly arranged on the second transmission shaft located on the upper side of the horizontal support.

Wherein, the cleaning component comprises a cleaning shell fixedly arranged on the inner wall of the left side of the working cavity, a cleaning cavity is arranged in the cleaning shell, a motor is fixedly arranged on the inner wall of the upper side of the cleaning cavity, the lower end of the motor is in power connection with an eighth transmission shaft, the lower end of the eighth transmission shaft is fixedly provided with a second gear, the inner wall of the right side of the cleaning cavity is provided with a slide block chute communicated with the working cavity, the inner wall of the lower side of the cleaning cavity is provided with a cleaning slide block capable of extending rightwards through the slide block chute, a connecting spring is connected between the cleaning slide block and the inner wall of the left side of the cleaning cavity, a third gear is fixedly arranged on a seventh transmission shaft which is positioned on one side of the vertical support close to the symmetry center, a ninth transmission shaft which extends leftwards and rightwards is rotatably connected on the vertical support, and an overrunning clutch which only can perform one-way transmission is, freewheel clutch surface set firmly with the fourth gear that third gear engagement connects is located vertical support is kept away from center of symmetry one side the ninth transmission epaxial sector gear that has set firmly, just sector gear flank of tooth radian is ninety degrees, vertical support is kept away from center of symmetry one end and is rotated and be connected with the tenth transmission shaft, the tenth transmission epaxial set firmly can with the fifth gear that sector gear engagement connects, the fifth gear with be connected with the torsional spring between the vertical support, the tenth transmission epaxial set firmly the clearance brush.

Advantageously, during rotation of the sector gear, after the sector gear is not in meshing engagement with the fifth gear, the torsion spring is required to ensure that the return of the cleaning brush is ensured between the next meshing engagement of the sector gear and the fifth gear, so as to achieve timely cleaning of the threaded portion of the third drive shaft.

The invention has the beneficial effects that: according to the invention, the leftwards and rightwards symmetrical cleaning brushes are adopted, and the swinging of the cleaning brushes is adopted, so that the automatic cleaning of the scraps accumulated on the third transmission shaft is realized, the influence on the service life of the screw rod caused by the scrap problem is avoided, and the scrap removing work of the cleaning brushes on the corresponding sides can be automatically started and stopped according to different moving directions of the fixed support plate, so that the energy consumption is reduced; and after the milling and carving work is finished, the chips at the upper end of the working cavity can be automatically removed, and the problem of unbalance caused when the next metal plate is placed is solved.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a schematic enlarged view of the structure of "A" of FIG. 1;

fig. 3 is a schematic enlarged view of the structure of "B" of fig. 1.

Detailed Description

The invention will now be described in detail with reference to fig. 1-3, wherein for ease of description the orientations described hereinafter are now defined as follows: the up, down, left, right, and front-back directions described below correspond to the up, down, left, right, and front-back directions in the projection relationship of fig. 1 itself.

The metal milling and carving device capable of prolonging the service life of the lead screw comprises a carving device shell 11, wherein a working chamber 12 with an opening at the right side is arranged in the carving device shell 11, a lifting control component 901 is arranged in the working chamber 12, the lifting control component 901 comprises a toothed support 70 which is arranged on the inner wall at the rear side of the working chamber 12 and can slide up and down, a lifting control chamber 14 which is arranged on the inner wall at the left side of the working chamber 12 and is communicated with the outside, a first transmission shaft 58 which is rotatably connected with the inner wall at the rear side of the lifting control chamber 14, a first gear 61 which is fixedly arranged on the first transmission shaft 58 and is meshed with the toothed part at the left end of the toothed support 70, the toothed support 70 can be driven to move up and down through the rotation of the first gear 61, a milling and carving component 902 is arranged at the right end of the toothed support 70, the milling and carving component comprises a supporting transverse plate 28 which is fixedly arranged at the right, a fixed support plate 49 fixedly arranged at the lower end of the supporting transverse plate 28, a horizontal support plate 46 fixedly arranged at the front end of the fixed support plate 49, a second transmission shaft 47 which is rotatably connected with the horizontal support plate 46 and extends up and down, a cutter head support 48 which is arranged at the lower side of the horizontal support plate 46 and is fixedly connected with the second transmission shaft 47, a milling cutter head 25 fixedly arranged at the lower end of the cutter head support 48, a motor 20 embedded in the toothed support 70, a third transmission shaft 26 which is connected with the right end of the motor 20 and extends rightwards, and the threaded portion of the third transmission shaft 26 is threadedly connected with the internally threaded portion of the fixed support plate 49, when the third transmission shaft 26 rotates, the fixed fulcrum 49 moves to the right and the milling cutter head 25 moves to the left, milling and carving of the processed metal plate can be achieved, and a cleaning assembly 903 used for cleaning metal chips is further arranged in the working cavity 12.

According to the embodiment, the lifting control assembly 901 will be described in detail below, the lifting control assembly 901 further includes a first bevel gear 65 fixedly disposed on the first transmission shaft 58 and located in front of the first gear 61, a matching bracket 71 is fixedly disposed on an inner wall of a lower side of the lifting control chamber 14, a fourth transmission shaft 69 extending left and right is rotatably connected to the matching bracket 71, a second bevel gear 68 engaged with the first bevel gear 65 is fixedly disposed on the fourth transmission shaft 69 located on a right side of the matching bracket 71, an adjusting hand wheel 55 is fixedly disposed at a left end of the fourth transmission shaft 69, a spring bracket 59 is fixedly disposed on an inner wall of a lower side of the lifting control chamber 14, a moving bracket 15 capable of sliding left and right and located between the spring bracket 59 and the matching bracket 71 is disposed on an inner wall of a lower side of the lifting control chamber 14, a return spring 67 is connected between the moving bracket 15 and the spring bracket 59, the movable support 15 is rotatably connected with a fifth transmission shaft 66 in splined connection with the fourth transmission shaft 69, the outer surface of the fifth transmission shaft 66 is provided with L-shaped supports 57 in an up-down symmetrical manner, the left end of each L-shaped support 57 is fixedly provided with a hook block 56, and the right end of the movable support 15 is further fixedly provided with a limiting rack 13 which can be matched with the toothed part at the left end of the toothed support 70.

According to the embodiment, the milling and carving assembly 902 is described in detail below, the milling and carving assembly 902 further includes a primary pulley 21 fixedly disposed on the third transmission shaft 26, a rotation shaft bracket 27 is fixedly disposed at the lower end of the supporting horizontal plate 28, a sixth transmission shaft 29 extending rightwards to the left end of the rotation shaft bracket 27 is rotatably connected to the right end of the toothed bracket 70, a secondary pulley 31 is fixedly disposed on the sixth transmission shaft 29, a connecting belt 30 is connected between the secondary pulley 31 and the primary pulley 21, two vertical brackets 39 are fixedly disposed at the front ends of the fixing support plates 49 in a left-right symmetric manner, a seventh transmission shaft 72 extending rightwards to the right side of the vertical bracket 39 is rotatably connected to the left vertical bracket 39, the seventh transmission shaft 72 is connected to the sixth transmission shaft 29 in a spline manner, a third bevel gear 42 is fixedly disposed on the sixth transmission shaft 29, and a second transmission shaft 47 disposed at the upper side of the horizontal bracket 46 is fixedly engaged with the third bevel gear 42 And a connected fourth bevel gear 41.

According to the embodiment, the following detailed description will be made on the cleaning assembly 903, the cleaning assembly 903 includes a cleaning housing 16 fixedly disposed on the inner wall of the left side of the working chamber 12, a cleaning chamber 17 is disposed in the cleaning housing 16, a motor 24 is fixedly disposed on the inner wall of the upper side of the cleaning chamber 17, an eighth transmission shaft 23 is power-connected to the lower end of the motor 24, a second gear 22 is fixedly disposed at the lower end of the eighth transmission shaft 23, a slider chute 73 communicated with the working chamber 12 is disposed on the inner wall of the right side of the cleaning chamber 17, a cleaning slider 19 capable of extending rightwards through the slider chute 73 is disposed on the inner wall of the lower side of the cleaning chamber 17, a connecting spring 18 is connected between the cleaning slider 19 and the inner wall of the left side of the cleaning chamber 17, a third gear 40 is fixedly disposed on the seventh transmission shaft 72 on the side of the vertical support 39 close to the symmetry center, a ninth transmission shaft 38 extending leftwards and rotatably connected to, lie in vertical support 39 is close to symmetry center one side set firmly on the ninth transmission shaft 38 and only can carry out one-way transmission's freewheel clutch 45, freewheel clutch 45 surface set firmly with the fourth gear 44 that the meshing of third gear 40 is connected is located vertical support 39 keeps away from symmetry center one side set firmly sector gear 37 on the ninth transmission shaft 38, just sector gear 37 flank of tooth radian is ninety degrees, vertical support 39 is kept away from symmetry center one end and is rotated and be connected with tenth transmission shaft 35, set firmly on the tenth transmission shaft 35 can with the fifth gear 34 that sector gear 37 meshing is connected, fifth gear 34 with be connected with torsional spring 36 between the vertical support 39, set firmly on the tenth transmission shaft 35 and clear up brush 33.

Advantageously, during the rotation of the sector gear 37, after the sector gear 37 is not in meshing engagement with the fifth gear 34, the torsion spring 36 is required to ensure that the return of the cleaning brush 33 is ensured between the next meshing engagement of the sector gear 37 with the fifth gear 34, so as to achieve a timely cleaning of the threaded portion of the third drive shaft 26.

In the initial state, the toothed part at the right end of the limit rack 13 is meshed with the toothed part at the left end of the toothed bracket 70, so that the toothed bracket 70 is in a limited up-and-down moving state, the cleaning slide block 19 is positioned at the left limit position, and the fixed support plate 49 is positioned at the right limit position.

Application method

When metal milling and carving work is carried out, the left end of a thicker metal plate to be machined is abutted against and fixed with the right end of the cleaning shell 16, at the moment, a worker can use a palm to abut against the adjusting hand wheel 55, and uses a forefinger and a ring finger to respectively hook the upper hook block 56 and the lower hook block 56 and then pull the upper hook block and the lower hook block leftwards, so that the hook block 56 moving leftwards drives the moving support 15 to move leftwards through the L-shaped support 57 and the fifth transmission shaft 66, the return spring 67 accumulates elastic potential energy, the moving support 15 moving leftwards drives the toothed part at the right end of the limit rack 13 to be not meshed and connected with the toothed part at the left end of the toothed support 70, at the moment, the toothed support 70 can move upwards and downwards, and the worker can rotate the adjusting hand wheel 55, so that the rotating adjusting hand wheel 55 drives the first gear 61 to rotate in a corresponding direction through the fourth transmission, the toothed bracket 70 is adjusted to move up and down, so that the height of the milling cutter head 25 is correspondingly adjusted, when the adjustment is completed, the height of the lower end of the milling cutter head 25 is lower than that of the upper end of a thicker metal plate to be processed, at the moment, a worker can release the hook block 56, so that the return spring 67 releases elastic potential energy and drives the movable bracket 15 to reset to the right, the movable bracket 15 reset to the right drives the toothed part at the right end of the limit rack 13 to be meshed and connected with the toothed part at the left end of the toothed bracket 70, so that the toothed bracket 70 is in a limited up-and-down movement state again at the moment, the motor 20 is started to rotate the third transmission shaft 26, the rotating third transmission shaft 26 sequentially drives the main belt wheel 21, the connecting belt 30, the auxiliary belt wheel 31 and the sixth transmission shaft 29 to drive the seventh transmission shaft 72 to rotate, and, the rotating third gear 40 drives the fourth gear 44 to rotate, at this time, the rotating direction of the right fourth gear 44 is different from the transmission direction of the overrunning clutch 45, so that the right overrunning clutch 45 does not transmit, at this time, the rotating direction of the left fourth gear 44 is the same as the transmission direction of the overrunning clutch 45, so that the left overrunning clutch 45 transmits, so that the rotating left fourth gear 44 sequentially passes through the left overrunning clutch 45 and the left ninth transmission shaft 38 to drive the left sector gear 37 to rotate, when the rotating left sector gear 37 is meshed with the left fifth gear 34, the rotating left sector gear 37 drives the left tenth transmission shaft 35 to rotate through the left fifth gear 34, the left torsion spring 36 accumulates elastic potential energy, the rotating left tenth transmission shaft 35 drives the left cleaning brush 33 to rotate and performs a chip removing operation on the threaded part of the third transmission shaft 26 on the left side of the fixed support plate 49, when the sector gear 37 is not meshed with the fifth gear 34 any more, the left torsion spring 36 releases elastic potential energy and drives the left tenth transmission shaft 35 to rotate reversely, so that the left cleaning brush 33 rotates reversely and removes chips of the left third transmission shaft 26 again, and when the left cleaning brush 33 removes chips, the rotating third bevel gear 42 drives the milling cutter 25 to rotate sequentially through the fourth bevel gear 41, the second transmission shaft 47 and the cutter holder 48, the rotating third transmission shaft 26 drives the fixed support plate 49 to move leftwards, so that the milling cutter 25 moves leftwards and performs milling and carving on metal plates, after the milling and carving are completed, the motor 20 is started reversely, so that the third transmission shaft 26 rotates reversely, so that the fixed support plate 49 moves rightwards, and at the same time, the rotating direction of the left fourth gear 44 is different from the transmission direction of the overrunning clutch 45, therefore, the left overrunning clutch 45 is not driven, at the moment, the rotation direction of the right fourth gear 44 is the same as the transmission direction of the overrunning clutch 45, the right overrunning clutch 45 is driven, at the moment, the right cleaning brush 33 carries out scrap removal work on the threaded part on the third transmission shaft 26 on the right side of the fixed support plate 49, after the toothed support 70 is reset to the right, the motor 20 is turned off, the motor 24 is started, the second gear 22 is driven to rotate through the eighth transmission shaft 23, the rotating second gear 22 drives the cleaning slide block 19 to move to the right, the connecting spring 18 accumulates elastic potential energy, the cleaning slide block 19 moving to the right removes metal scraps accumulated on the inner wall of the lower side of the working cavity 12, after the cleaning is finished, the motor 24 is turned off, the connecting spring 18 releases the elastic potential energy, and the electric cleaning slide block 19.

The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. The utility model provides a can improve lead screw life's metal and mill engraving device, includes the engraving device casing, be equipped with right side open-ended working chamber in the engraving device casing, its characterized in that:

the lifting control assembly is arranged in the working cavity and comprises a toothed support, a lifting control cavity, a first transmission shaft and a first gear, wherein the toothed support is arranged on the inner wall of the rear side of the working cavity and can slide up and down;

the tooth support right-hand member is equipped with mills sculpture subassembly, mill sculpture subassembly including set firmly in take the support diaphragm of tooth support right-hand member, set firmly in support the fixed extension board of diaphragm lower extreme, set firmly in the horizontal stand of fixed extension board front end, rotate connect in horizontal stand and the second transmission shaft that extends from top to bottom, locate horizontal stand downside and with second transmission shaft fixed connection's tool bit support, set firmly in the milling cutter head of tool bit support lower extreme, embedded in take the tooth support in the motor, power connect in the motor right-hand member and the third transmission shaft that extends to the right side, just the screw thread part of third transmission shaft with the internal thread part threaded connection of fixed extension board, still be equipped with the clearance subassembly in the working chamber.

2. The metal milling engraving device capable of prolonging the service life of the screw rod according to claim 1, wherein: the lifting control assembly further comprises a first bevel gear fixedly arranged on the first transmission shaft and positioned in front of the first bevel gear, a matching support is fixedly arranged on the inner wall of the lower side of the lifting control cavity, a fourth transmission shaft extending left and right is rotatably connected onto the matching support, a second bevel gear meshed with the first bevel gear is fixedly arranged on the fourth transmission shaft positioned on the right side of the matching support, an adjusting hand wheel is fixedly arranged at the left end of the fourth transmission shaft, a spring support is fixedly arranged on the inner wall of the lower side of the lifting control cavity, a moving support capable of sliding left and right and positioned between the spring support and the matching support is arranged on the inner wall of the lower side of the lifting control cavity, a reset spring is connected between the moving support and the spring support, a fifth transmission shaft connected with a spline with the fourth transmission shaft is rotatably connected onto the moving support, and L-shaped supports are symmetrically and vertically arranged on the outer surface of the fifth transmission shaft, the left end of the L-shaped support is fixedly provided with a hook block, and the right end of the movable support is also fixedly provided with a limit rack which can be matched with the toothed part at the left end of the toothed support.

3. The metal milling engraving device capable of prolonging the service life of the screw rod according to claim 1, wherein: the milling and carving component further comprises a main belt wheel fixedly arranged on the third transmission shaft, a rotating shaft support is fixedly arranged at the lower end of the supporting transverse plate, the right end of the toothed support is rotatably connected with a sixth transmission shaft extending to the left end of the rotating shaft support rightwards, an auxiliary belt wheel is fixedly arranged on the sixth transmission shaft, a connecting belt is connected between the auxiliary belt wheel and the main belt wheel, two vertical supports are fixedly arranged at the front end of the fixed support plate in a bilateral symmetry mode, the left side of the fixed support plate is rotatably connected with a seventh transmission shaft extending to the right side of the vertical support rightwards, the seventh transmission shaft is connected with the sixth transmission shaft through splines, a third bevel gear is fixedly arranged on the sixth transmission shaft, and a fourth bevel gear meshed with the third bevel gear is fixedly arranged on the second transmission shaft located on the upper side of the horizontal support.

4. The metal milling engraving device capable of prolonging the service life of the screw rod according to claim 1, wherein: the cleaning assembly comprises a cleaning shell fixedly arranged on the inner wall of the left side of the working cavity, a cleaning cavity is arranged in the cleaning shell, a motor is fixedly arranged on the inner wall of the upper side of the cleaning cavity, the lower end of the motor is in power connection with an eighth transmission shaft, the lower end of the eighth transmission shaft is fixedly provided with a second gear, the inner wall of the right side of the cleaning cavity is provided with a slide block chute communicated with the working cavity, the inner wall of the lower side of the cleaning cavity is provided with a cleaning slide block capable of extending rightwards through the slide block chute, a connecting spring is connected between the cleaning slide block and the inner wall of the left side of the cleaning cavity, a third gear is fixedly arranged on a seventh transmission shaft on one side, close to the symmetry center, of the vertical support, a ninth transmission shaft is rotatably connected with a ninth transmission shaft extending leftwards and rightwards, and an overrunning clutch capable of only performing one-way transmission is fixedly, freewheel clutch surface set firmly with the fourth gear that third gear engagement connects is located vertical support is kept away from center of symmetry one side the ninth transmission epaxial sector gear that has set firmly, just sector gear flank of tooth radian is ninety degrees, vertical support is kept away from center of symmetry one end and is rotated and be connected with the tenth transmission shaft, the tenth transmission epaxial set firmly can with the fifth gear that sector gear engagement connects, the fifth gear with be connected with the torsional spring between the vertical support, the tenth transmission epaxial set firmly the clearance brush.

5. The metal milling engraving device capable of prolonging the service life of the screw rod according to claim 4, wherein: sector gear pivoted in-process sector gear not with the back is connected in the meshing of fifth gear, the torsional spring needs the guarantee sector gear with just can ensure between the meshing connection of the next time of fifth gear that the clearance brush resets, and the realization is right the timely clearance of the screw thread part of third transmission shaft.