CN219582363U - Automatic knife grinder - Google Patents

Abstract

The utility model discloses an automatic knife grinder, which comprises a frame, a cutter clamping table and an angle adjusting mechanism of the cutter clamping table, wherein the cutter clamping table and the angle adjusting mechanism of the cutter clamping table are arranged on the frame, and a grinding tool formed by a motor and a grinding stone, and is characterized in that: the grinding apparatus is installed on vertical slide rail with the mode of sliding from top to bottom, and vertical slide rail is installed on automatic horizontal reciprocating mechanism vertical slide rail upper portion is installed lift actuating mechanism, has the elastic component to link up between lift actuating mechanism and the grinding apparatus to adjust grinding apparatus height and grindstone working face to the grinding pressure of cutter. The utility model has the following beneficial effects: the grinding pressure can be adjusted according to the needs, the grinding range of the grinding tool can be conveniently adjusted according to the length of the cutting edge of the cutter, the cutter clamping operation is simple and convenient, the inclined included angle between the cutting edge of the cutter and the grinding tool can be accurately and conveniently adjusted, and the two sides of the cutter are simultaneously cooled during grinding, so that annealing and hardness reduction caused by grinding heat generation on the cutting edge of the cutter are avoided.

Description

Automatic knife grinder

Technical Field

The utility model relates to a knife grinder, in particular to an automatic knife grinder.

Background

The knife edge becomes blunt due to the problems of abrasion of the blade part, edge rolling, chipping and the like in the using process of the knife such as kitchen knife, hacking knife, meat cutting knife, boning knife and the like, and the knife edge needs to be ground to become sharp again. The traditional sharpening mode is that a master sharpeners manually sharpens by using a sharpening stone and an oilstone, so that the efficiency is low, and the work which looks simple is actually a technology, and a sharpening worker is a professional.

The grinding efficiency is improved to a certain extent by using electric tools such as grinding wheels, abrasive belts and the like to carry out rough grinding and then manually carrying out fine grinding by using oilstones and the like, but the technical difficulty is not greatly reduced, and key factors which influence the grinding quality, such as the angle between the cutting edge and the grinding tool and the pressing force during grinding are mainly controlled by experience.

In recent years, more advanced knife sharpeners have been developed, in which a slide block is driven by a screw rod to move horizontally, a vertical slide rail is mounted on the slide block, a rotary grinding tool composed of a motor and a cylindrical oilstone is mounted on the slide rail through the slide block, and a bolt tool clamping device is used for clamping and fixing a tool to be sharpened, and under the combined action of the self weight of the grinding tool and a force application mechanism composed of a spring, the abrasive surface of the grinding tool is kept in contact with the tool edge part and applies pressure. However, the special knife grinder is suitable for occasions requiring a large number of cutters to grind, and has economical efficiency, which brings about some problems: (1) Because the grinding tool is lifted upwards by manual force when the cutter is installed or turned over each time, the operator is easy to feel arm ache and fatigue when frequently lifting the grinding tool. (2) For the arc-shaped blade, as a certain inclination angle is formed between the grinding tool and the blade, the profile height of the blade changes, the pressure applied by the spring force application mechanism increases along with the increase of the height, so that the grinding amounts of different parts of the blade are inconsistent, and the abrasion of the higher parts is increased. (3) The grinding stroke control of grinding tool, the contained angle between cutting edge and the grinding tool is adjusted, and the cutter is tightly pressed from both sides all to need manual operation, especially needs to adjust the bolt repeatedly, and work is loaded down with trivial details and inefficiency.

In view of the above, the inventor starts to obtain the automatic knife grinder according to years of cutter processing experience and through repeated design and test.

Disclosure of Invention

Aiming at the problems of low efficiency, large workload and high technical requirements of the existing knife sharpening mode and knife sharpener, the utility model provides an automatic knife sharpener, which improves the prior art, improves the working efficiency and reduces the working difficulty.

The utility model is realized by the following technical scheme: the utility model provides an automatic knife grinder, includes the frame and installs the tight platform of cutter clamp and the tight platform angle adjustment mechanism of cutter clamp in the frame to and the grinding apparatus that comprises motor and grindstone, the grinding apparatus is installed on vertical slide rail with the mode of sliding from top to bottom, and vertical slide rail is installed on automatic horizontal reciprocating mechanism vertical slide rail upper portion is installed and is gone up and down actuating mechanism, has the elastic component to link up between lifting drive mechanism and the grinding apparatus, in order to adjust grinding apparatus height and grindstone work face the grinding pressure of cutter. The lifting driving mechanism is used for lifting the grinding tool upwards by a machine when the cutter is replaced or the cutter is turned over, so that various defects of manually lifting the grinding tool when the cutter is replaced or the cutter is turned over in the prior art can be avoided, the lifting driving mechanism can be used for adjusting the upward push-pull acting force of the elastic piece on the grinding tool according to specific characteristics of the cutter, and the grinding pressure applied by the grinding tool on the cutter can be adjusted by resisting part of the dead weight of the grinding tool, so that the grinding pressure requirements of different cutters are met.

The lifting device can adopt an air cylinder and a hydraulic cylinder, and is convenient for accurate control, preferably adopts a stepping motor and a screw rod structure, and a spring is arranged between a sliding block driven by the screw rod and the grinding tool to form the elastic piece. For compact structure, can also adopt install the biax step motor on vertical slide rail or the horizontal reciprocating mechanism, the elastic component is the spring, and it connects respectively two to wind the flexible cable on the output shaft at biax motor both ends the spring upper end, two spring lower extreme are connected on the grinding apparatus. In this way, the acting force of the spring on the grinding tool can be calculated and controlled according to the deformation length of the spring, so that the grinding pressure of the grinding tool on the cutter can be controlled.

Further, the spring is also provided with a pressure sensor, the stepping motor is controlled by the controller, the pressure of the grinding tool to the cutter is automatically controlled to be a constant value according to the comparison between the set value and the value measured by the pressure sensor, and the cutter with the radian of the cutter edge can also automatically adjust the height of the grinding tool according to the change of the radian of the cutter edge and keep the contact pressure of the grinding tool and the cutter edge constant at the same time, so that the grinding quantity of the whole arc-shaped cutter edge is nearly consistent.

Further, the automatic grinding device also comprises a pair of proximity switches for controlling the reciprocating stroke range of the horizontal reciprocating mechanism, namely the grinding range, wherein the proximity switches are arranged on a sliding block driven by a positioning motor and a positive and negative tooth screw rod, and a scale is further extended on the sliding block towards the direction of a cutter clamping table so as to calibrate and position two ends of a cutter. The positioning motor and the screw rod control a pair of proximity switches to synchronously move in opposite directions or reversely move, the side can conveniently adjust the grinding range of the grinding tool along the direction of the cutting edge according to the length of the tool through controlling the stroke of the horizontal reciprocating mechanism, and meanwhile, the correct placing position of the tool is calibrated, namely the central position of the cutting edge of the tool is consistent with the central position of the stroke of the grinding tool.

Further, the cutter clamping table comprises a cutter supporting plate, a pressing rod is arranged on the upper surface of the cutter supporting plate and hinged to a hinged seat on the cutter supporting plate through a first hinge shaft, the pressing rod is hinged to the front end of an operating rod through a second hinge shaft, the middle part of the operating rod is hinged to the end part of a connecting rod through a third hinge shaft, the other end of the connecting rod is hinged to the hinged seat on the cutter supporting plate through a fourth hinge shaft, a handle is formed at the rear end part of the operating rod, and a rubber head is arranged at the end part of the pressing rod to form elastic pressing force and improve friction force on the cutter so as to prevent the cutter from sliding during grinding. The multi-link lever type cutter clamping mechanism compresses the cutter by utilizing the lever principle, is convenient to operate, has a locking point and is not loosened after the cutter is compressed.

Further, the rubber head is arranged on a screw rod, the screw rod penetrates through the end part of the pressure rod and is positioned by an upper nut and a lower nut, and the clamping force can be conveniently adjusted by changing the downward extending length of the screw rod through an adjusting nut.

Further, the angle adjusting mechanism of the cutter clamping table comprises a stepping motor and a screw rod driven sliding block which are arranged below the cutter supporting plate and mounted on the frame, one end of a connecting rod is hinged to the sliding block, the other end of the connecting rod is hinged to the cutter supporting plate, and one end of the cutter supporting plate is hinged to the frame. When the sliding block is driven to move by the stepping motor, the sliding block upwards supports the cutter supporting plate through the connecting rod to enable the cutter supporting plate to rotate around the hinge shaft by a certain angle, so that the cutter supporting plate and the inclined angle of the cutter installed on the cutter supporting plate can be conveniently realized, and the automatic setting and the control of the grinding angle of the cutter and the grinding tool can be realized due to the corresponding relation between the rotating angle and the number of turns of the stepping motor and the inclined angle of the cutter supporting plate.

Further, the grinding tool comprises a water storage tank positioned below the grinding tool and the tool clamping table, and a water pump, wherein an outlet of the water pump is connected with a cooling water pipe to spray cooling water to the surface of the tool so as to wash away generated grinding materials and metal scraps and cool down, and an inlet of the water pump is provided with a filtering material to filter out the grinding materials and the metal scraps.

Further, the cooling water pipe comprises a fixed water pipe which is positioned below the cutter and sprays cooling water to the back surface of the cutter, and a movable water pipe which is fixed on the grinding tool and sprays cooling water to the upper surface of the cutter along with the movement of the grinding tool, so that the upper surface and the lower surface of the cutter are cooled simultaneously.

Further, the movable water pipe is composed of a middle hose and a universal joint water pipe so as to conveniently adjust the water spraying direction, and a flat nozzle is arranged at the end part of the universal joint water pipe so as to form fan-shaped water flow to increase impulse and a cooling surface.

Further, the automatic horizontal reciprocating mechanism is composed of a horizontal sliding rail, a motor, a screw rod and a sliding block which is arranged on the horizontal sliding rail and driven by the screw rod. Of course, the use of hydraulic cylinders, air cylinders, etc. is also possible.

The utility model has the following beneficial effects:

(1) The lifting driving mechanism is adopted to automatically lift the grinding tool so as to facilitate the operation of placing, taking and placing the cutting tools, so that the grinding tool is not required to be lifted manually, and the labor intensity is reduced.

(2) The lifting driving mechanism and the elastic piece are adopted to act together, so that the dead weight of a part of grinding tools can be counteracted, the grinding pressure can be adjusted according to the needs through the pressure sensor and the automatic controller, and the problem of uneven grinding quantity cannot be caused for the arc-shaped cutting edge.

(3) The two proximity switches and the scale driven by the front and back tooth screw rods can conveniently adjust the grinding range of the grinding tool according to the length of the cutting edge of the cutter.

(4) The tool clamping operation is simple and convenient.

(5) The inclination angle between the cutter blade and the grinding tool can be accurately and conveniently adjusted.

(6) The grinding cools the two sides of the cutter at the same time, so that annealing of the cutter edge part due to grinding heat generation is avoided, and hardness is reduced.

Drawings

FIG. 1 is a front view of an automatic knife grinder of the present utility model;

FIG. 2 is a cross-sectional view A-A of the automatic knife sharpener of FIG. 1;

fig. 3 is a side view of the mounting structure of the proximity switch of the automatic knife grinder shown in fig. 1 and 2;

FIG. 4 is a schematic view of the tool clamping table of the automatic knife sharpener of FIGS. 1 and 2 in an unclamped configuration;

FIG. 5 is a front view of the angle adjustment structure;

FIG. 6 is a schematic view of an angle adjustment mechanism with a tilt angle;

fig. 7 is a schematic view of a second embodiment of the grinding tool lifting drive mechanism.

In the figure, 1, a frame, 2, a water pump, 3, a motor, 4, a ball screw, 5, a guide rail, 6, a proximity switch, 7, a sliding block, 8, a motor, 9, a screw, 10, a horizontal sliding rail, 11, a cylindrical grinding stone, 12, a motor, 13, a stepping motor, 14, a controller, 15, a vertical sliding rail, 16, a cutter clamping table, 17, a cutter, 18, an angle adjusting mechanism, 19, a water storage tank, 20, a filter material, 21, a horizontal sliding block, 22 and a vertical sliding block; 23. the device comprises a spring, 24, a stepping motor, 25, a lead screw, 25a, a guide rail, 26, a sliding block, 27, a connecting rod, 28, a cutter supporting plate, 29, a hinge shaft, 30, a pressure sensor, 31, a scale, 32 and a sliding seat;

16a, first hinge shaft, 16b, second hinge shaft, 16c, third hinge shaft, 16d, fourth hinge shaft, 160, hinge seat, 161, operation lever, 162, compression bar, 163, nut, 164, screw, 165, rubber head.

Detailed Description

The utility model will be described in detail below with reference to the drawings and the preferred embodiments to facilitate understanding of the contents of the utility model.

Example 1

As shown in fig. 1 and 2, the automatic knife sharpener of the present embodiment includes a frame 1 for mounting and securing various devices and components. The machine frame 1 is provided with a cutter clamping table 16 and an angle adjusting mechanism 18 which is arranged in the middle and is used for adjusting the inclination angle of the cutter clamping table 16 so as to realize a certain acute angle between the cutting edge of the cutter 17 and the grinding surface of the cylindrical grinding stone in the grinding tool. At the rear part of the frame, two horizontal slide rails 10 with V-shaped grooves and a screw rod 9 driven by a motor 8 are arranged, a horizontal slide block 21 which is arranged on the horizontal slide rail 10 and provided with a screw hole in the middle part passing through the screw rod 9, and a horizontal reciprocating mechanism is formed together with the screw rod 19, the motor 8 and the horizontal slide rail 10 so as to realize horizontal reciprocating motion of a grinding tool arranged on the horizontal slide block 21. The grinding tool consists of a motor 12 and a cylindrical grinding stone 11, wherein the lower end surface of the grinding stone 11 is a grinding working surface which is in contact with the cutting edge of a cutter 17 to grind the cutting edge. The motor 12 of the grinder is fixed on the vertical slider 22, the vertical slider 22 is mounted on the vertical slide rail 15 in a manner of sliding up and down, and the vertical slide rail 15 is mounted on the horizontal slider 21 of the automatic horizontal reciprocating mechanism, so that the grinder can move up and down to change the distance with the cutter and the grinding pressure, and can move horizontally and horizontally in a reciprocating manner to change the grinding position with the cutter edge, and the edge part of the whole cutter 17 is ground.

As one of the important improvements of the present utility model, an abrasive tool lifting drive mechanism is added. In the lifting driving mechanism in this embodiment, as shown in fig. 1 and 2, a biaxial stepping motor 13 is installed at the top of a vertical sliding rail 15 (or a horizontal sliding block 21), flexible ropes formed by a section of steel wire ropes are respectively wound on output shafts at two ends of the motor 13, the lower ends of the flexible ropes are connected with a spring 23, the lower ends of the springs 23 are connected to a vertical sliding block 22 (or a motor 12), and the springs 23 serve as elastic members to connect a grinding tool and the lifting driving mechanism. The grinding tool formed by the motor 12 and the grinding stone 11 can be downwards or upwards pulled up along the vertical sliding rail 15 through the steel wire rope and the spring 23 by controlling the forward and reverse operation of the stepping motor 13, and the grinding tool is far away from the cutter during pulling up so as to leave an operation space for taking and placing the cutter. When the cutter is ground, the cutter is contacted with the cutter through the falling grinding tool, the pressure of the cutter to the cutter is the gravity of the cutter and the elastic tension of the spring 12 to the cutter, so that the tension change of the spring 23 to the cutter can be controlled through the stepping motor 13, the tension can be adjustable between 0 (the dead weight of the cutter is completely under the dead weight of the cutter and the spring is stretched to the longest and completely bear the dead weight of the cutter), and the grinding pressure of the cutter to the cutter is determined and adjusted according to the elongation of the spring (by installing a scale or a range finder on a sliding block or a motor or a sliding rail) because the tension is in linear relation with the elongation of the spring 23, namely the contact pressure of the cutter to the cutter is also in linear relation with the elongation of the spring 23. The pressure sensor can be arranged at one end of the spring, the pressure value can be obtained by direct measurement, and the pressure sensor is connected with the controller 14 of the stepping motor 13 to form an automatic control loop, so that the pressure value can be set according to the requirements of different cutter grinding pressures (such as the hardness and sharpness of the cutter) and the automatic control and adjustment of the grinding pressure can be realized. This is especially effective to arc cutting edge, can realize guaranteeing under the invariable circumstances of pressure, and the grinding apparatus height is along with cutting edge radian automatic adjustment, guarantees that different positions grind the volume and is unanimous basically.

Another key technology of the present utility model is to automatically adjust the stroke of the horizontal reciprocating motion of the grinder, i.e. the grinding range along the direction of the cutter blade according to the length of the cutter blade. The adopted technology is that, as shown in fig. 1, 2 and 3, two cylindrical guide rails 5 are horizontally arranged on the machine frame 1 below the horizontal reciprocating mechanism at the height position of the cutter clamping table, a positive and negative tooth ball screw 4 driven by a motor 3 is arranged between the two cylindrical guide rails 5, and a sliding block 7 arranged on the guide rails 5 is driven by a positioning motor 3 and the positive and negative tooth ball screw 4 to synchronously move towards or away from each other along the guide rails 5. A pair of proximity switches 6 for controlling the reciprocating stroke range, i.e. the grinding range, of the horizontal reciprocating mechanism are arranged on the sliding block 7, a scale 31 is further extended on the sliding block 7 towards the direction of the cutter clamping table, and the end part of the scale 31 is slightly lower than the upper surface of the cutter, so that the cutter and the grinding tool are not affected. After the tool is placed on the tool clamping table as shown in fig. 3, the motor 3 can be started by a key on the controller 14, the slide block 7 is close to the tool from two sides, and when the scale 31 approaches or reaches two ends of the tool blade as shown in fig. 3, the motor 3 stops, and at the moment, the two proximity switches 6 are just in the correct positions. Because the proximity switch 6 is shielded by the grindstone of the grinder to obtain a signal for controlling the motor to rotate reversely, the position of the proximity switch 6 in the embodiment is slightly outside than the scale 31, that is, the outer side of the grindstone of the grinder is ensured to slightly extend out of the cutter blade by a certain distance, and the effective grinding of the two ends of the blade is ensured. According to the technology, the positioning motor 3 and the screw 4 control a pair of proximity switches 6 to synchronously move in opposite directions or reversely move, so that the grinding range of the grinding tool along the direction of the cutting edge can be conveniently adjusted according to the length of the tool, and meanwhile, the correct placing position of the tool is calibrated, namely the center position of the tool is consistent with the center position of the stroke of the grinding tool.

The tool clamping table is constructed as shown in fig. 2, 4 and 6 and includes a tool support plate 28 for positioning and supporting the tool 17. A pressing bar 162 is hinged on the upper surface of the tool support plate 17 to a saddle-shaped hinge seat 160 via a first hinge shaft 16a such that the first pressing bar 162 is hinged to the tool support plate 28. The pressing rod 162 is hinged to the front end of an operating rod 161 through a second hinge shaft 16b, the middle part of the operating rod 161 is hinged to the end of a connecting rod 163 through a third hinge shaft 16c, the other end of the connecting rod 163 is hinged to a hinge seat 160 on the upper surface of the cutter supporting plate 28 through a fourth hinge shaft 16d, and the rear end of the operating rod 161 forms a handle. The end of the pressing rod 162 is provided with a screw rod 164, the screw rod 164 passes through the end of the pressing rod 162 and is positioned by an upper double nut 163 and a lower double nut 163, and the lower end of the screw rod 164 is provided with a rubber head 165. The clamping force of the rubber head 165 on the cutter can be conveniently adjusted by changing the downward extending length of the screw 164 through the adjusting nut 163. As shown in fig. 2 and 6, when the tail end of the lever 161 is depressed, the second hinge point 16b, the third hinge point 16c and the fourth hinge point 16d are substantially in a straight line, and the link 163 and the lever 161 substantially horizontally support the second hinge point 16b of the pressing lever 162, so that the rubber head 165 presses the cutter 17 against the cutter supporting plate 18. In the utility model, two points of the cutter are clamped by two sets of link mechanisms, so that elastic pressing force is formed on the cutter 17 through a rubber head, the friction force is improved, and the cutter is prevented from sliding during grinding. When the handle of the operating lever 161 in the state shown in fig. 2 and 6 is lifted upward as shown in fig. 4, the link lever 163 is rotated upward and leftward in the drawing about the fourth hinge shaft 16d, and moves upward and leftward in fig. 4 in a V-shape with the operating lever 161, the front end of the operating lever 161 is pushed downward and leftward by the second hinge shaft 16b to rotate about the first hinge shaft 16a while the front end thereof is lifted up together with the screw 164 and the rubber-plastic head 165, and is separated from the cutter 17, thereby releasing the cutter-clamping state. The multi-connecting-rod cutter clamping mechanism compresses the cutter by utilizing the lever principle, is convenient to operate, has a locking point (the third hinge shaft 16c is positioned on the connecting line of the second hinge shaft and the fourth hinge shaft or is slightly lower than the connecting line), does not loosen after compressing the cutter, and is more convenient and quick than the traditional cutter clamping and cutter clamping state releasing by screwing bolts.

The tool clamping table angle adjusting mechanism for adjusting the included angle between the tool and the grinding tool research surface is shown in fig. 2, 5 and 6, and comprises a slide block 26 positioned below a tool supporting plate 28 and driven by a stepping motor 24 and a screw rod 25 mounted on the frame 1, and a pair of cylindrical guide rails 25a, wherein one end of two connecting rods 27 are hinged on the side surface of the slide block 26, the other end of each connecting rod is hinged on the tool supporting plate 28, and the other end of the tool supporting plate 28 is hinged on the frame through a hinge shaft 29. When the slide block 26 is driven to move forward (left side in the drawing) by the stepping motor 24, the slide block 26 upwardly supports the cutter supporting plate 28 by a certain angle around the hinge shaft 29 through the connecting rod 27, so that the inclination of the cutter supporting plate 28 and the cutter 17 mounted thereon can be conveniently realized by a certain angle as shown in fig. 6, and the included angle is adjusted by changing the position of the slide block. Since the rotation angle and the number of turns of the stepping motor 24 have a corresponding relationship with the inclination angle of the cutter supporting plate 28, automatic setting and control of the grinding angle of the cutter and the grinder can be achieved by controlling the stepping motor 24, and the angle can be automatically set by the controller 14.

As shown in fig. 1 and 2, the device further comprises a water storage tank 19 positioned below the grinding tool and the tool clamping table, and a water pump 2, wherein an outlet of the water pump 2 is connected with a cooling water pipe (omitted in the figure) so as to spray cooling water to the surface of the tool, so that grinding materials and metal scraps generated during grinding of the tool are washed away, the tool is cooled, the used cooling water flows and splashes into the water storage tank 19 to be collected, the water storage tank can be recycled, and the environment can be ensured to be clean. In the water storage tank 19, a filter material 20 is arranged at the inlet of the water pump to filter out the abrasive and the metal scraps, so that the cooling water is purified and recycled. The filter material 20 may be filter cotton laid in the water storage tank 19. The cooling water pipe comprises a fixed water pipe which is positioned below the cutter and sprays cooling water to the back surface of the cutter, and a movable water pipe which is fixed on the grinding tool at the water outlet end and sprays cooling water to the upper surface of the cutter along with the movement of the grinding tool, so that the upper surface and the lower surface of the cutter are cooled simultaneously. The movable water pipe consists of a middle hose and a universal joint water pipe so as to conveniently adjust the water spraying direction, and a flat nozzle is arranged at the end part of the universal joint water pipe so as to form fan-shaped water flow to increase impulse and a cooling surface. The cooling water pipe technology is easily understood and is therefore omitted from the figures.

Each motor is controlled by the controller 14, and the controller 14 adopts PLC control, so that parameters such as pressure, angle and the like corresponding to different cutters can be set.

Example 2

As shown in fig. 7, another embodiment of the grinding tool lifting drive mechanism is shown. On horizontal slider 21, the installation is fixed with the vertical slide rail that comprises two vertical installation's cylinder guide rails, and the grinding motor 12 of grinding apparatus passes through slide 32 to install on vertical slide rail, so that can follow vertical slide rail and slide from top to bottom, lead screw 15 passes the unthreaded hole that is greater than the lead screw external diameter on the slide 32. The stepping motor 13 for driving lifting is arranged on the upper part of the vertical sliding rail, the vertical sliding block 22 arranged on the vertical sliding rail can lift along the sliding rail by driving the lead screw 15 passing through the screw hole of the vertical sliding block 22, and the spring 23 and the pressure sensor 30 are arranged between the sliding seat 32 and the sliding block 22. When the grinding stone 11 contacts with the blade of the cutter and generates pressure, the weight of the motor 12, the grinding stone 11 and the sliding seat 32 is equal to the resultant force of the supporting force of the cutter to the grinding stone and the elastic supporting force provided by the spring 23, so that the grinding pressure of the grinding stone 11 to the cutter can be adjusted by adjusting the position of the sliding block 22 through the motor and changing the compression amount of the spring 23, namely the elastic force, and therefore, the grinding pressure can be automatically adjusted by taking the pressure information of the pressure sensor 30 as the 14 signal of the controller and comparing and calculating the pressure setting value to adjust the stepping motor 13.

The above embodiments are merely understood by those skilled in the art that modifications of the embodiments based on the same or similar principles fall within the scope of the utility model.

Claims (10)

1. The utility model provides an automatic knife grinder, includes frame and installs cutter clamp table and cutter clamp table angle adjustment mechanism in the frame to and the grinding apparatus that comprises motor and grindstone, its characterized in that: the grinding apparatus is installed on vertical slide rail with the mode of sliding from top to bottom, and vertical slide rail is installed on automatic horizontal reciprocating mechanism vertical slide rail upper portion is installed lift actuating mechanism, has the elastic component to link up between lift actuating mechanism and the grinding apparatus to adjust grinding apparatus height and grindstone working face to the grinding pressure of cutter.

2. The automatic knife sharpener of claim 1, wherein: the lifting driving mechanism adopts a double-shaft stepping motor arranged on the vertical sliding rail or the horizontal reciprocating mechanism, the elastic piece is a spring, the output shafts at the two ends of the double-shaft stepping motor are wound with flexible ropes which are respectively connected with the upper ends of the two springs, and the lower ends of the two springs are connected with the grinding tool.

3. The automatic knife sharpener of claim 1, wherein: the lifting driving mechanism is of a stepping motor screw structure, and a spring is arranged between a sliding block driven by the screw and the grinding tool to form the elastic piece.

4. The automatic knife sharpener of claim 2 or 3, wherein: the spring is also provided with a pressure sensor, and the stepping motor is controlled by a controller.

5. The automatic knife sharpener of claim 1, 2 or 3, wherein: the automatic positioning device is characterized by further comprising a pair of proximity switches for controlling the reciprocating stroke range of the horizontal reciprocating mechanism, wherein the proximity switches are arranged on a sliding block driven by a positioning motor and a positive and negative tooth screw rod, and a scale is further extended on the sliding block towards the direction of a cutter clamping table so as to calibrate and position two ends of a cutter.

6. The automatic knife sharpener of claim 1, 2 or 3, wherein: the tool clamping table comprises a tool supporting plate, a pressing rod is arranged on the upper surface of the tool supporting plate and hinged to a hinged seat in the tool supporting plate through a first hinge shaft, the pressing rod is hinged to the front end of an operating rod through a second hinge shaft, the middle part of the operating rod is hinged to the end part of a connecting rod through a third hinge shaft, the other end of the connecting rod is hinged to a hinged seat in the tool supporting plate through a fourth hinge shaft, a handle is formed at the rear end part of the operating rod, and a rubber head is arranged at the end part of the pressing rod to form elastic pressing force for the tool and improve friction force.

7. The automatic knife sharpener of claim 6, wherein: the rubber head is arranged on a screw rod, and the screw rod penetrates through the end part of the compression bar and is positioned by an upper double nut and a lower double nut.

8. The automatic knife sharpener of claim 6, wherein: the angle adjusting mechanism of the cutter clamping table comprises a stepping motor and a screw rod driven sliding block which are arranged below the cutter supporting plate and mounted on the frame, one end of a connecting rod is hinged to the sliding block, the other end of the connecting rod is hinged to the cutter supporting plate, and one end of the cutter supporting plate is hinged to the frame.

9. The automatic knife sharpener of claim 1, 2 or 3, wherein: the water pump is connected with the cooling water pipe to spray cooling water to the surface of the cutter, and a filtering material is arranged at the inlet of the water pump.

10. The automatic knife sharpener of claim 9, wherein: the cooling water pipe comprises a fixed water pipe positioned below the cutter and spraying cooling water to the back surface of the cutter, and a movable water pipe with a water outlet end fixed on the grinding tool and spraying cooling water to the upper surface of the cutter along with the movement of the grinding tool, wherein the movable water pipe consists of a middle hose and a universal joint water pipe, and a flat nozzle is arranged at the end part of the universal water-saving pipe.