CN111687697A

CN111687697A - Automatic grinding device of cutter

Info

Publication number: CN111687697A
Application number: CN202010711733.1A
Authority: CN
Inventors: 郭磊
Original assignee: Ningbo Aiya Machinery Equipment Co Ltd
Current assignee: Ningbo Aiya Machinery Equipment Co Ltd
Priority date: 2020-07-22
Filing date: 2020-07-22
Publication date: 2020-09-22

Abstract

The invention discloses an automatic grinding device of a cutter, which comprises a bottom plate arranged on the ground, wherein a support column is fixedly connected to the left side of the upper surface of the bottom plate, a top plate is fixedly connected to the upper side of the support column, square rings with symmetrical left and right positions are fixedly connected to the upper surface of the top plate, square cavities are arranged in the square rings, a first rotating shaft is rotatably connected to the front wall and the rear wall of each square cavity, a first belt pulley is fixedly connected to the first rotating shaft, a first belt is connected between the first belt pulleys, the cutter can be comprehensively ground on two sides only by simply fixing the cutter and adjusting the position of a grinding block, the operation of the whole process is very simple, the labor intensity is low, the grinding efficiency is higher, the structure is simple, and the cutter and the grinding block are fixed in the grinding process, so that the grinding thickness in the left and right directions is uniform and stable, and then the polishing quality is better, is worth promoting.

Description

Automatic grinding device of cutter

Technical Field

The invention relates to the technical field of grinding devices or equipment, in particular to an automatic grinding device for a cutter.

Background

The knife is a common tool in daily life, and the knife edge is often dull after use, so the knife needs to be frequently ground to keep the knife edge sharp;

generally speaking, the grinding of the cutter is carried out manually, the labor intensity of manual grinding is very high, the efficiency and the grinding efficiency are not very good, and equipment capable of automatically grinding the cutter still exists in the market at present, but the defects still exist, such as complex structure, complex operation, uneven grinding depth and poor grinding quality, and the invention discloses a device capable of solving the problems.

Disclosure of Invention

The invention aims to provide an automatic grinding device for a cutter, which is used for overcoming the defects in the prior art.

The automatic grinding device for the cutter comprises a bottom plate arranged on the ground, wherein a support column is fixedly connected to the left side of the upper surface of the bottom plate, a top plate is fixedly connected to the upper side of the support column, square rings with symmetrical left and right positions are fixedly connected to the upper surface of the top plate, a square cavity is arranged in each square ring, a first rotating shaft is rotatably connected to the front wall and the rear wall of each square cavity, a first belt wheel is fixedly connected to each first rotating shaft, a first belt is connected between the first belt wheels, the rear end of each first belt wheel on the left side is in power connection with a first motor fixedly arranged on the rear wall of each square cavity, a vertical sleeve plate is sleeved on each first belt, a rhombic conductive block used for pushing the vertical sleeve plate is fixedly connected to each first belt, square blocks are fixedly connected to the top wall of each square cavity, and a track rod penetrating through and slidably connected to the vertical sleeve plate is fixedly connected between the square blocks, the arc-shaped plates which are fixedly connected to the front wall and the rear wall of the square cavity and can be abutted against the rhombic conducting blocks are arranged on one opposite side of the first belt wheel, the arc-shaped surfaces on one opposite side of the arc-shaped plates are respectively internally provided with long iron blocks and short iron blocks which are symmetrical in front and back positions and used for conducting electricity, the right sides of the supporting columns are provided with fixing boxes which are symmetrical in left and right positions and fixedly arranged on the upper surface of the bottom plate, the upper sides of the fixing boxes are provided with side columns, moving mechanisms used for controlling the side columns to move up and down are arranged in the fixing boxes, connecting columns are fixedly connected between the side columns, sleeves are connected in the side columns in a penetrating and rotating mode, square shafts which are symmetrical in left and right positions are connected in the sleeves in a sliding mode, the side plates which are symmetrical in left and right positions are fixedly connected to one opposite ends of the square shafts, the inside of fixed block is equipped with the fixture that is used for the centre gripping cutter, the downside of cutter be equipped with set firmly in liftable adjustment height's grinding machanism on the bottom plate upper surface.

On the basis of the technical scheme, the moving mechanism comprises a box cavity located in the fixed box, the top wall of the box cavity is penetrated through and is connected with a sliding device to stretch out the fixed box and the upper end of the fixed box are fixedly connected with a slide bar and a side column, the left side of the left side wall and the right side wall of the box cavity are connected with a second rotating shaft in a rotating mode, the left end of the second rotating shaft is connected with a power source to be fixedly arranged on a second motor on the left wall of the fixed box, a rotating wheel is fixedly connected with the second rotating shaft, a first rope sleeve and a second rope sleeve are fixedly connected to the right wall and the top wall of the box cavity respectively, the upper end of the rotating wheel is wound to penetrate through the first rope sleeve, the second rope sleeve is fixedly connected with a pull rope at the lower end of the slide bar, and the second motor is respectively connected with.

On the basis of the technical scheme, the rotating mechanism comprises a third motor which is connected to the sleeve on the left side in a power mode and fixedly arranged inside the side column on the left side, the third motor is connected with the short iron block circuit on the left side through a second electric wire, the third motor is connected with the short iron block circuit on the right side through a third electric wire, the direction of the potential difference of a power supply of the second electric wire and the third electric wire is opposite, the left end of the square shaft on the left side is fixedly connected with a first bearing, the lower end of the vertical sleeve plate is fixedly connected with a connecting block, a first cavity is formed in the bottom wall of the connecting block, and a connecting rod of which the lower end is fixedly connected with the first bearing is connected in the first cavity; the left side of the side column is internally provided with a second cavity penetrated by the left side sleeve and the left side square shaft, and the second cavity is internally and slidably connected with a rotating block fixedly arranged on the left side sleeve.

On the basis of the technical scheme, the clamping mechanism comprises a third cavity positioned in the bottom wall of the fixed block, a fourth cavity is arranged in the front wall and the rear wall of the third cavity, a third rotating shaft is rotatably connected in one side wall opposite to the fourth cavity, an extrusion rod penetrating through and slidably connected with one side wall opposite to the fourth cavity is in threaded connection with one side opposite to the third rotating shaft, a cushion is fixedly connected with one end opposite to the extrusion rod, one end opposite to the third rotating shaft is in key connection with a first bevel gear, the first bevel gear is in meshing connection with a second bevel gear, a fourth rotating shaft penetrating through the top wall of the fourth cavity is fixedly connected on the upper side of the second bevel gear, the upper end of the fourth rotating shaft extends into a fifth cavity positioned on the upper part of the fixed block, and a first chain wheel in key connection with the fourth rotating shaft is arranged in the fifth cavity, the chain is connected with the chain between the first sprocket, the middle chain of chain is connected with the second sprocket, fixedly connected with runs through and rotate on the second sprocket connect in the rotation handle of fixed block.

On the basis of the technical scheme, the polishing mechanism is fixedly arranged on a sliding cylinder and a power box on the upper surface of the bottom plate, a push rod is connected in the sliding cylinder in a sliding mode, the push rod is connected in the power box in a threaded mode, a supporting block is fixedly connected to the upper end of the push rod, a polishing shaft is rotatably connected between the supporting blocks, a polishing block is fixedly connected to the polishing shaft, and the right end of the polishing shaft is dynamically connected with a fourth motor fixedly arranged in the left surface of the supporting block on the right side; the power box is internally provided with a power cavity, the right side of the power box is internally provided with a square cavity in the bottom wall of the ejector rod, a sliding shaft is connected in the square cavity in a sliding mode, the sliding shaft is connected with a third bevel gear in a key mode, the upper side of the third bevel gear is abutted to a limiting block fixedly arranged on the left wall of the power cavity, the right side of the third bevel gear is connected with a fourth bevel gear in a meshed mode, and the right side of the fourth bevel gear is connected with a twisting handle which penetrates through the right side of the power box and.

The invention has the beneficial effects that: the double-sided comprehensive grinding of the cutter can be realized only by simply fixing the cutter and adjusting the position of the grinding block, the operation of the whole process is very simple, the labor intensity is low, the grinding efficiency is higher, the structure is simple, and the cutter and the grinding block are fixed in the grinding process, so that the grinding thickness in the left and right directions is uniform and stable, the grinding quality is better, and the double-sided comprehensive grinding tool is worthy of popularization.

Drawings

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

FIG. 1 is a schematic view of the overall structure of an automatic grinding device for a cutting tool according to the present invention;

FIG. 2 is a schematic view of the present invention taken along the line A-A of FIG. 1;

FIG. 3 is a schematic view of the present invention taken along the line B-B of FIG. 1;

FIG. 4 is a schematic view of the present invention taken along the line C-C of FIG. 1;

fig. 5 is a detail view of the arcuate plate of fig. 1 in accordance with the present invention.

Detailed Description

The invention will now be described in detail with reference to fig. 1-5, for convenience of description, the following orientations will now be defined: 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.

Referring to fig. 1 to 5, an automatic grinding device for a tool according to an embodiment of the present invention includes a base plate 10 installed on a ground, a support pillar 11 is fixedly connected to a left side of an upper surface of the base plate 10, a top plate 76 is fixedly connected to an upper side of the support pillar 11, square rings 12 symmetrical in left and right positions are fixedly connected to an upper surface of the top plate 76, a square cavity 17 is disposed in the square ring 12, a first rotating shaft 55 is rotatably connected to a front and rear wall of the square cavity 17, a first pulley 20 is fixedly connected to the first rotating shaft 55, a first belt 19 is connected between the first pulleys 20, a first motor 54 fixedly connected to a rear wall of the square cavity 17 is dynamically connected to a rear end of the first pulley 20 on a left side, a vertical sleeve plate 15 is sleeved on the first belt 19, a diamond-shaped conductive block 16 for pushing the vertical sleeve plate 15 is fixedly connected to the first belt 19, the top wall of the square cavity 17 is fixedly connected with square blocks 13, the track rods 14 penetrating through and slidably connected with the vertical sleeve plates 15 are fixedly connected between the square blocks 13, an arc plate 18 fixedly connected with the front and rear walls of the square cavity 17 and capable of abutting against the rhombic conductive blocks 16 is arranged on one side of the first belt pulley 20, long iron blocks 58 and short iron blocks 59 which are symmetrical in front and rear positions and used for conducting electricity are respectively arranged in the arc surface on one side opposite to the arc plate 18, a fixed box 34 fixedly arranged on the upper surface of the bottom plate 10 and symmetrical in left and right positions is arranged on the right side of the supporting column 11, side columns 38 are arranged on the upper side of the fixed box 34, a moving mechanism 801 used for controlling the side columns 38 to move up and down is arranged in the fixed box 34, connecting columns 39 are fixedly connected between the side columns 38, and sleeves 77 penetrate through and are rotatably connected with the inside of the side columns 38, sliding connection has the square shaft 25 of bilateral symmetry in sleeve 77, the curb plate 61 of the one end fixedly connected with bilateral symmetry that the square shaft 25 is relative, fixedly connected with fixed block 62 between the curb plate 61, it is left be equipped with the messenger on the square shaft 25 curb plate 61 rotation angle's rotary mechanism 802, the inside of fixed block 62 is equipped with the fixture 803 that is used for centre gripping cutter 60, the downside of cutter 60 be equipped with set firmly in liftable adjustment height's grinding machanism 804 on bottom plate 10 upper surface.

In addition, in one embodiment, the moving mechanism 801 includes a housing 35 located within the stationary housing 34, a sliding rod 37 is connected in the top wall of the box cavity 35 in a penetrating and sliding manner and extends out of the fixed box 34, the upper end of the box cavity is fixedly connected with the side column 38, a second rotating shaft 30 is connected in the left and right walls of the box cavity 35 on the left side in a rotating manner, the left end of the second rotating shaft 30 is connected with a second motor 27 fixedly arranged on the left wall of the fixed box 34, the second rotating shaft 30 is fixedly connected with a rotating wheel 31, the right wall and the top wall of the box cavity 35 are respectively and fixedly connected with a first rope socket 33 and a second rope socket 36, a pull rope 32 with the upper end passing through the first rope socket 33 and the second rope socket 36 and fixedly connected with the lower end of the sliding rod 37 is wound on the rotating wheel 31, the second motor 27 is electrically connected to the long iron blocks 58 on both sides through the first electric wires 28.

In addition, in one embodiment, the rotating mechanism 802 includes a third motor 26 that is power connected to the sleeve 77 on the left side and is fixedly disposed inside the jamb 38 on the left side, the third motor 26 is electrically connected to the short iron block 59 on the left side through a second electric wire 29, the third motor 26 is electrically connected to the short iron block 59 on the right side through a third electric wire 75, the second electric wire 29 and the third electric wire 75 have opposite potential difference directions from each other, the left end of the square shaft 25 on the left side is fixedly connected to a first bearing 24, the lower end of the vertical sleeve plate 15 is fixedly connected to a connecting block 21, a first cavity 22 is disposed in the bottom wall of the connecting block 21, and a connecting rod 23 having a lower end fixedly connected to the first bearing 24 is slidably connected to the first cavity 22; a second cavity 56 penetrated by the sleeve 77 on the left side and the square shaft 25 on the left side is arranged in the side column 38 on the left side, and a rotating block 57 fixedly arranged on the sleeve 77 on the left side is connected in the second cavity 56 in a sliding manner.

In addition, in one embodiment, the clamping mechanism 803 includes a third cavity 78 located in the bottom wall of the fixed block 62, a fourth cavity 79 is located in the front and rear walls of the third cavity 78, a third rotating shaft 66 is rotatably connected in one side wall opposite to the fourth cavity 79, a squeezing rod 65 penetrating through and slidably connected to one side wall opposite to the fourth cavity 79 is threadedly connected to one side opposite to the third rotating shaft 66, a soft pad 64 is fixedly connected to one end opposite to the squeezing rod 65, a first bevel gear 67 is keyed to one end of the third rotating shaft 66 opposite to the other end, a second bevel gear 68 is engaged and connected to the first bevel gear 67, a fourth rotating shaft 69 penetrating through the top wall of the fourth cavity 79 is fixedly connected to the upper side of the second bevel gear 68, the upper end of the fourth rotating shaft 69 extends into a fifth cavity 70 located in the upper portion of the fixed block 62, a first sprocket 71 keyed to the fourth rotating shaft 69 is located in the fifth cavity 70, a chain 72 is connected between the first chain wheels 71, a second chain wheel 74 is connected to the middle chain of the chain 72, and a rotating handle 63 which penetrates through and is rotatably connected to the fixed block 62 is fixedly connected to the second chain wheel 74.

In addition, in one embodiment, the polishing mechanism 804 is fixedly arranged on a sliding cylinder 40 and a power box 81 on the upper surface of the bottom plate 10, a push rod 41 is slidably connected in the sliding cylinder 40, the push rod 41 is connected in the power box 81 through a thread, a supporting block 42 is fixedly connected to the upper end of the push rod 41, a polishing shaft 43 is rotatably connected between the supporting blocks 42, a polishing block 44 is fixedly connected to the polishing shaft 43, and a fourth motor 45 fixedly arranged in the left surface of the supporting block 42 on the right side is dynamically connected to the right end of the polishing shaft 43; the power box 81 is internally provided with a power cavity 53, the bottom wall of the ejector rod 41 on the right side is internally provided with a square cavity 46, the square cavity 46 is connected with a sliding shaft 47 in a sliding manner, the sliding shaft 47 is connected with a third bevel gear 50 in a key manner, the upper side of the third bevel gear 50 is abutted with a limiting block 51 fixedly arranged on the left wall of the power cavity 53, the right side of the third bevel gear 50 is connected with a fourth bevel gear 52 in a meshing manner, and the right side of the fourth bevel gear 52 is connected with a twisting handle 48 which penetrates through and is rotatably connected with the power box 81 in a key manner.

In the initial state, the grinding block 44 is positioned at the lowermost side, the side post 38 is positioned at the lowermost side, and the rotating block 57 and the side post 38 are inclined forward.

When the tool needs to be ground to work, the tool 60 is inserted into the third cavity 78, then the rotating handle 63 is screwed, the second chain wheel 74 rotates and drives the chain 72 to move, the first chain wheel 71 rotates and drives the second bevel gear 68 to rotate, the first bevel gear 67 rotates and the third rotating shaft 66 rotates, the extrusion rods 65 cannot rotate relative to the fixed block 62 and only slide, so that the extrusion rods 65 move oppositely under the rotation of the third rotating shaft 66, and the cushion 64 moves oppositely and clamps the tool 60 between the third cavity 78; then, the screw handle 48 is screwed, the fourth bevel gear 52 rotates, the third bevel gear 50 rotates, the sliding shaft 47 rotates, the right ejector rod 41 is in threaded connection with the power box 81, and the limiting block 51 limits the upward movement of the third bevel gear 50 and the sliding shaft 47, so that the ejector rod 41 moves upwards due to the rotation of the sliding shaft 47, the supporting block 42 moves upwards and drives the grinding shaft 43 and the grinding block 44 to move upwards until the grinding block 44 abuts against the surface to be ground of the cutter 60; then, the fourth motor 45 is started, and then the grinding shaft 43 rotates and drives the grinding block 44 to rotate and the cutter 60 grinds; then, the first motor 54 is started, the first rotating shaft 55 rotates and drives the first belt pulley 20 to rotate, the first belt 19 moves and drives the rhombic conductive block 16 to move leftwards, and further, because the thickness of the rhombic conductive block 16 in the front-back direction is larger than the width of an inner groove of the vertical sleeve plate 15, the rhombic conductive block 16 moves leftwards and drives the vertical sleeve plate 15 to move leftwards, the connecting rod 23 moves leftwards and drives the first bearing 24 to move leftwards, the side plate 61 is driven to move leftwards through the square shaft 25, the cutter 60 moves leftwards, and therefore comprehensive polishing on the plane of the cutter 60 is achieved; when the vertical sleeve plate 15 moves to the leftmost side, the left surface of the square ring 12 is clamped, the rhombic conductive block 16 is driven by the first belt 19 to pass through the inner groove of the vertical sleeve plate 15, and the rhombic conductive block 16 continues to move along with the first belt 19 while the vertical sleeve plate 15 is suspended at the position; the diamond shaped conductive block 16 then moves to the left and begins to abut the arc plate 18, and the diamond shaped conductive block 16 contacts the long iron block 58, and the second motor 27 is started, and the second rotating shaft 30 rotates and drives the rotating wheel 31 to rotate, the pulling rope 32 is further contracted, and the sliding rod 37 moves upwards, so that the side post 38 moves upwards and drives the cutter 60 to move upwards, then the diamond-shaped conductive piece 16 contacts the short iron piece 59, and the circuit of the second electric wire 29 is completed, and the circuits of the long iron piece 58 and the short iron piece 59 do not interfere with each other, and then the third motor 26 is started, and then the sleeve 77 on the left side rotates, and then the square shaft 25 on the left side rotates and drives the side plate 61 and the rear side of the cutter 60 box to rotate until the rotating block 57 rotates to the final side of the second cavity 56, at this time, the rhombic conducting block 16 is separated from the short iron block 59, the third motor 26 is turned off, and the side plate 61 and the cutter 60 are kept in a state of being inclined toward the rear side; then the rhombic conductive block 16 is disconnected from the long iron block 58, the second motor 27 is turned off, the sliding rod 37 moves downwards under the self gravity to the lowest end, and the other side surface of the cutter 60 is abutted to the grinding block 44 and is ground; then the rhombic conductive block 16 starts to move to the right side and drives the vertical sleeve plate 15 to move to the right, and further drives the side plate 60 and the cutter 60 to gradually move to the right through the square shaft 25, so that the side surface is comprehensively polished, when the rhombic conductive block 16 moves to the rightmost side, the rhombic conductive block 16 is forcibly clamped through the vertical sleeve plate 15 again, and when the rhombic conductive block 16 is in butt contact with the short iron block 59 on the right side, the direction of the power supply potential difference of the third electric wire 75 and the second electric wire 29 is opposite, the direction of the current is opposite, the rotating direction of the third motor 26 is opposite, and then the third motor 26 drives the side plate 61 and the cutter 60 to turn forwards and incline again, so that the front side surface and the rear side surface are returned to the initial state, and a round of polishing cycle.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. The utility model provides an automatic grinding device of cutter, is including installing the subaerial bottom plate, its characterized in that: the left side of the upper surface of the bottom plate is fixedly connected with a supporting column, the upper side of the supporting column is fixedly connected with a top plate, the upper surface of the top plate is fixedly connected with a square ring with symmetrical left and right positions, a square cavity is arranged in the square ring, a first rotating shaft is rotationally connected with the front wall and the rear wall of the square cavity, a first belt wheel is fixedly connected onto the first rotating shaft, a first belt is connected between the first belt wheels, the rear end of the left first belt wheel is in power connection with a first motor fixedly arranged on the rear wall of the square cavity, a vertical sleeve plate is sleeved on the first belt, a rhombic conducting block used for pushing the vertical sleeve plate is fixedly connected onto the first belt, a square block is fixedly connected onto the top wall of the square cavity, a track rod penetrating and slidably connected onto the vertical sleeve plate is fixedly connected between the square blocks, an arc plate fixedly connected onto the front wall and the rear wall of the square cavity and capable of abutting against the rhombic conducting block is arranged on one side of the, the arc surface of one side of the arc plate is provided with a long iron block and a short iron block which are symmetrical in front and back position and used for conducting electricity, the right side of the supporting column is provided with a fixed box which is fixedly arranged on the upper surface of the bottom plate and is symmetrical in left and right positions, the upper side of the fixed box is provided with a side column, a moving mechanism for controlling the side column to move up and down is arranged in the fixed box, a connecting column is fixedly connected between the side columns, a sleeve is penetrated and rotatably connected in the side columns, a square shaft with symmetrical left and right positions is connected in the sleeve in a sliding way, one end opposite to the square shaft is fixedly connected with a side plate with symmetrical left and right positions, a fixed block is fixedly connected between the side plates, a rotating mechanism for rotating the side plates is arranged on the square shaft on the left side, the inside of fixed block is equipped with the fixture that is used for the centre gripping cutter, the downside of cutter be equipped with set firmly in liftable adjustment height's grinding machanism on the bottom plate upper surface.

2. The automatic sharpening device for a tool as set forth in claim 1, wherein: the moving mechanism is including being located the case chamber in the fixed incasement, run through and sliding connection stretches out in the roof in case chamber fixed case and upper end with side post fixedly connected with slide bar, it is left the left and right wall internal rotation in case chamber is connected with the second pivot, the left end power connection of second pivot have set firmly in second motor on the fixed case left wall, fixedly connected with runner in the second pivot, on the right wall in case chamber and the roof respectively first noose of fixedly connected with and second noose, the winding has the upper end to pass on the runner first noose second noose and fixed connection in the stay cord of slide bar lower extreme, the second motor through first electric wire respectively with both sides the rectangular iron block circuit connection.

3. The automatic sharpening device for a tool as set forth in claim 1, wherein: the rotating mechanism comprises a third motor which is connected to the sleeve on the left side in a power mode and fixedly arranged inside the side column on the left side, the third motor is connected with the short iron block circuit on the left side through a second electric wire, the third motor is connected with the short iron block circuit on the right side through a third electric wire, the direction of potential difference of a power supply of the second electric wire is opposite to that of the potential difference of a power supply of the third electric wire, the left end of the square shaft on the left side is fixedly connected with a first bearing, the lower end of the vertical sleeve plate is fixedly connected with a connecting block, a first cavity is formed in the bottom wall of the connecting block, and a connecting rod of which the lower end is fixedly connected with the; the left side of the side column is internally provided with a second cavity penetrated by the left side sleeve and the left side square shaft, and the second cavity is internally and slidably connected with a rotating block fixedly arranged on the left side sleeve.

4. The automatic sharpening device for a tool as set forth in claim 1, wherein: the clamping mechanism comprises a third cavity positioned in the bottom wall of the fixed block, a fourth cavity is arranged in the front wall and the rear wall of the third cavity, a third rotating shaft is rotatably connected in one side wall opposite to the fourth cavity, one side opposite to the third rotating shaft is in threaded connection with an extrusion rod which penetrates through and is slidably connected with one side wall opposite to the fourth cavity, one end opposite to the extrusion rod is fixedly connected with a cushion, one end of the third rotating shaft opposite to the third rotating shaft is connected with a first bevel gear in a key mode, the first bevel gear is connected with a second bevel gear in a meshing mode, a fourth rotating shaft which penetrates through the top wall of the fourth cavity is fixedly connected on the upper side of the second bevel gear, the upper end of the fourth rotating shaft extends into a fifth cavity positioned on the upper portion of the fixed block, a first chain wheel which is connected with the fourth rotating shaft in a key mode is arranged in, the middle chain of the chain is connected with a second chain wheel, and the second chain wheel is fixedly connected with a rotating handle which penetrates through and is rotatably connected with the fixed block.

5. The automatic sharpening device for a tool as set forth in claim 1, wherein: the polishing mechanism is fixedly arranged on a sliding barrel and a power box on the upper surface of the bottom plate, a push rod is connected in the sliding barrel in a sliding mode, the push rod is connected in the power box in a threaded mode, a supporting block is fixedly connected to the upper end of the push rod, a polishing shaft is rotatably connected between the supporting blocks, a polishing block is fixedly connected to the polishing shaft, and the right end of the polishing shaft is dynamically connected with a fourth motor fixedly arranged in the left surface of the supporting block on the right side; the power box is internally provided with a power cavity, the right side of the power box is internally provided with a square cavity in the bottom wall of the ejector rod, a sliding shaft is connected in the square cavity in a sliding mode, the sliding shaft is connected with a third bevel gear in a key mode, the upper side of the third bevel gear is abutted to a limiting block fixedly arranged on the left wall of the power cavity, the right side of the third bevel gear is connected with a fourth bevel gear in a meshed mode, and the right side of the fourth bevel gear is connected with a twisting handle which penetrates through the right side of the power box and.