Special tool lifting platform for tool sharpener and automatic tool sharpener

Abstract

The utility model discloses a cutter lifting platform and an automatic cutter sharpener, the lifting platform comprises a top component and a base, a shear shank composed of one or more pairs of supporting arms is symmetrically arranged between the top component and the base, and the supporting arm positioning ends at the top end and the bottom end of the shear shank are respectively hinged with the top component and the base of the lifting platform. The sliding end of the supporting arm is connected with the top component and the base in a sliding mode, a motor and a lead screw driven by the motor are installed on the top component or the base, and the lead screw penetrates through a component which is connected with the sliding end of the supporting arm and provided with a screw hole. The automatic tool sharpener comprises a grinding tool and a tool platform, the tool platform is a tool lifting platform special for the tool sharpener and installed on a horizontal sliding rail, a tool clamp is installed at the top of the lifting platform, and a clamping opening of the tool clamp is vertically arranged; the grinding tool is fixedly installed on the side of the horizontal sliding rail. According to the tool sharpener, the grinding contact pressure can be easily controlled according to the grinding requirement of the tool, the grinding angle adjusting link is reduced, the tool sharpening efficiency is improved, and the stress of the tool is balanced.

Description

Technical Field

[0001] The utility model relates to a tool lifting platform for a knife sharpener, which is used for lifting and lowering the tool. Background Art

[0002] Kitchen knives, machetes, meat cutting knives, boning knives and other knives will become blunt due to blade wear, curling, and chipping during use, so the blade needs to be sharpened to make it sharp again. In order to improve the automation of knife sharpening and reduce the work intensity of knife sharpening, the inventor applied for a utility model patent CN219582363U named "Automatic Knife Sharpener", which includes a frame and a tool clamping table and a tool clamping table angle adjustment mechanism installed on the frame, as well as a grinder composed of a motor and a grindstone, the grinder is installed on a vertical slide rail in a way of sliding up and down, the vertical slide rail is installed on an automatic horizontal reciprocating mechanism, and a lifting drive mechanism is installed on the upper part of the vertical slide rail, and an elastic member is connected between the lifting drive mechanism and the grinder to adjust the height of the grinder and the grinding pressure of the grinder on the tool facing the grindstone. During the use of this knife sharpener, the inventor found the following deficiencies: (1) Since the knife is fixed in this knife sharpener, the tool is raised and lowered to press the blade to generate grinding pressure, and the tool is sharpened by horizontal reciprocating motion. After grinding one side, the tool must be removed from the clamping table, turned over, and then clamped to grind the other side, resulting in low work efficiency. (2) Since the tool has a large weight and grinding requires a certain amount of pressure, the grinding pressure is difficult to control by raising and lowering the tool and moving it horizontally, and the power consumption of the motor required to drive the heavy tool to raise and lower and move it horizontally is large. (3) The tool angle is difficult to adjust, and during grinding, the tool is subjected to grinding pressure in one direction, and the tool clamping table is subjected to uneven force, resulting in a short tool life.

[0003] In order to solve the above problems, the inventors tried to fix the mold and achieve contact with the mold by controlling the tool displacement and providing contact pressure, but the problem of precise control of the tool displacement and stability of the tool platform structure needed to be solved.

[0004] In view of this, the inventor has obtained the automatic knife sharpener and the lifting platform for the knife sharpener of the present utility model according to the above problems found in use and after repeated designs and tests. Utility Model Content

[0005] In view of the above problems existing in the existing knife sharpening methods and knife sharpening machines, the utility model provides a new lifting platform dedicated to an automatic knife sharpening machine and an automatic knife sharpening machine using the platform.

[0006] The utility model discloses a tool lifting platform specially used for a knife sharpener, comprising a top member and a base, wherein a vertically mounted scissors frame is symmetrically arranged between the top member and the base, wherein the scissors frame is composed of a pair or more pairs of support arms hinged into an X shape, wherein the support arm positioning ends at the top and bottom ends of the scissors frame are respectively hinged to the top member and the base of the lifting platform, wherein the support arm sliding ends at the top and bottom ends are respectively slidably connected to the top member and the base, wherein a motor and a lead screw driven by the motor are installed on the top member or the base, wherein the lead screw passes through a member with a screw hole connected to the sliding end of the support arm, so as to drive the top member of the lifting platform to rise and fall relative to the base.

[0007] Furthermore, a slideway parallel to the top member and the base is provided on the side opposite to the top member and the base of the lifting platform, a slider is installed in the slideway and is hinged to the end of the support arm, and the slideway guides and limits the slider to improve the lifting stability of the lifting platform, and the screw hole is provided on the slider.

[0008] Preferably, the slider has a rectangular cross section. Compared with a circular cross section, the surface contact formed by the rectangle can improve the running stability and wear resistance of the slider.

[0009] The motor can be a mechanism that outputs rotational torque, such as an electric motor, a hydraulic motor, or even an internal combustion engine, preferably a servo motor or a stepper motor. The servo is horizontally installed at the lower part of the top component of the lifting platform. The motor output shaft is connected to the screw, preferably a ball screw, to form a screw drive mechanism. The servo or stepper motor and the screw can be used to accurately control the lifting height of the lifting platform, and then control and adjust the contact grinding pressure between the tool and the mold. Since cooling water is needed to cool the tool during the sharpening process, the tool and mold grinding chips mixed in the cooling water enter the screw and affect the smooth transmission performance. The screw is installed under the top component of the lifting platform. Covering with the top component can improve the working environment of the screw and reduce the influence of cooling water, especially the debris therein.

[0010] Furthermore, there is a waterproof cover on the side of the top member extending downward to shield the lead screw and the slider.

[0011] The utility model also provides an automatic knife sharpener, which is realized by the following technical scheme: an automatic knife sharpener, comprising a grinder and a tool platform, wherein the tool platform adopts the aforementioned special tool lifting platform for the knife sharpener, the lifting platform is installed on a horizontal slide rail, a tool clamp is installed on the top of the lifting platform, and the clamping mouth of the tool clamp is vertically arranged; the grinder is fixedly installed on the side of the horizontal slide rail, the grinding surface of the grinder is vertically arranged and forms an acute angle with the plumb plane; the lifting height of the tool lifting platform is such that the tool contacts the grinding surface of the grinder when rising and loses contact when descending.

[0012] The tool clamp may be a vise or a similar clamping mechanism installed on the top of the lifting platform to improve the firmness of the tool clamping.

[0013] Furthermore, the horizontal sliding of the lifting platform on the horizontal slide rail is also driven by a servo motor and a lead screw.

[0014] Furthermore, the grinding tools are arranged in two rows on both sides of the horizontal slide rail, the grinding tools on both sides are staggered, and the top of the grinding surface of the grinding tool passes over the vertical plane where the center line of the tool blade is located to the opposite side, so that when the grinding surface of the grinding tool is worn, it is only necessary to raise the tool through the lifting platform to still maintain contact and grinding pressure to ensure the grinding effect.

[0015] Furthermore, the two rows of grinding tools are arranged with grinding meshes from low to high from front to back.

[0016] The utility model has the following beneficial effects:

[0017] (1) The automatic knife sharpener of the utility model adopts a grinding tool fixing, and the tool is lifted and lowered by a scissor frame lifting platform and a motor screw. The grinding contact pressure can be easily controlled according to the tool grinding requirements and can adapt to changes in tool specifications.

[0018] (2) Since the grinding angles between the grinder and the tool are fixed, the number of adjustment steps is reduced.

[0019] (3) Two rows of grinding tools are staggered on both sides of the horizontal slide rail and the grinding mesh is from low to high. The tool only needs to move along the slide rail once to achieve from coarse grinding to fine grinding, which improves the grinding efficiency and balances the force on the tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is the front view of the automatic knife sharpener of the utility model;

[0021] Figure 2 for Figure 1 A left side view of the automatic knife sharpener shown;

[0022] Figure 3 for Figure 1 A top view of the arrangement of the grinding tools in the automatic knife sharpening machine shown;

[0023] Figure 4 for Figure 1 Schematic diagram of the arrangement of the abrasive tools shown;

[0024] Figure 5 for Figure 1 The structural schematic diagram of the lifting platform in the automatic knife sharpening is shown;

[0025] Figure 6 for Figure 5 AA section view of the lifting platform shown;

[0026] Figure 7 for Figure 5A schematic diagram of the lifting platform in a raised state is shown;

[0027] Figure 8 It is a schematic diagram of a second embodiment of the lifting platform.

[0028] In the figure, 1, frame, 2, slide rail, 3, main servo motor, 4, base of lifting bracket, 5, scissors frame, 6, servo motor, 7, top member of lifting bracket, 8, fixture, 9, tool, 10, 10a, 10b, 10c, 10d, mold, 11, screw, 12, slider, 13, slideway, 14, waterproof cover, 20, lifting platform, 51, 52, support arm, 51a, 52a, support arm positioning end, 51b, 52b, support arm sliding end, 53, pin shaft. DETAILED DESCRIPTION

[0029] The present invention will be described in detail below in conjunction with the accompanying drawings and the best embodiments to help understand the content of the present invention.

[0030] like Figure 1 and Figure 2 As shown, the automatic knife sharpener of this embodiment includes a frame 1, and a grinder 10 composed of four sets of grinders 10a, 10b, 10c, and 10d for grinding a tool, a tool platform for clamping a tool 9 and controlling the tool lifting and lowering to achieve the tool contacting the grinding surface of the grinder, and a tool horizontal sliding mechanism composed of a main servo motor 3, a lead screw, and a screw nut fixed on the tool platform for driving the tool platform to move horizontally along a horizontal slide rail 2. Figure 1 and Figure 3 As shown in the figure, as the best embodiment, four sets of grinding tools 10a, 10b, 10c, 10d are fixedly installed on both sides of a pair of parallel horizontal slide rails 2, as shown in FIG. Figure 4 The grinding surface of the grinding tool is vertically arranged and forms an acute angle α of 5-10° with the vertical plane F to form a grinding angle so that the blade portion forms an acute angle of 2α.

[0031] The tool platform is composed of a lifting platform 20 and a fixture 8 installed on the top of the lifting platform 20. The fixture 8 is a vise or a similar clamping tool. The width of the clamp can be changed by rotating the lead screw by the handle. Figure 1 The tool lifting platform 20 is lifted to a height such that the tool 9 contacts the grinding surface of the abrasive tool 10 for grinding when it is lifted, and is released from contact when it is lowered to facilitate loading and unloading of the tool.

[0032] Combination Figure 2 and Figure 3As shown, the four grinding tools 10a, 10b, 10c, and 10d are arranged from the front (the direction of the grinding tool that the tool first contacts) to the back (the direction of the grinding tool that the tool contacts later), and the grinding mesh is set from low to high. For example, the grinding tools 10d and 10c are 60-mesh grinding discs to rough-grind the cutting edges on both sides of the tool, and the grinding tools 10b and 10a use 2000-mesh grinding discs to fine-grind the cutting edges of the tool after rough grinding. In this way, the tool moves along the slide rail 2 once to complete the rough grinding and fine grinding of both sides of the cutting edge of the tool, thereby improving the work efficiency. The switch for correspondingly controlling the operation of the grinding tool can be a proximity switch such as an infrared switch or a touch switch, and the grinding tool is started by using the tool platform to reach the switch position.

[0033] like Figure 2 , 3 As shown, the four sets of grinding tools on both sides of the slide rail 2 are arranged in a staggered manner. The advantage of such arrangement is that Figure 3 , Figure 4 As shown, the top ends of the two adjacent grinding surfaces of the abrasive tools cross the vertical plane F where the center line of the tool blade is located to the opposite side, and their projections form a cross. When the grinding surface of the abrasive tool 10 is worn, a V-shaped grinding working surface is still formed between the two adjacent grinding surfaces of the abrasive tools. The tool only needs to be raised by a lifting platform to maintain contact and grinding pressure, thereby ensuring the grinding effect.

[0034] Figure 1 , Figure 2 An embodiment of the tool lifting platform 20 used in the automatic knife sharpening machine shown in FIG. Figure 5-Figure 7 As shown, it includes a top member 7 and a base 4, and two vertically mounted scissor frames 5 are symmetrically arranged between the top member 7 and the base 4, and each scissor frame is composed of a pair of support arms 51 and 52 hinged in the middle into an X shape through a pin shaft 53. The support arm positioning ends 51a and 52a on the same side of the top and bottom ends of the scissor frame are respectively hinged to the top member 7 and the base 4 of the lifting platform, and the support arm sliding ends 51b and 52b at the top and bottom ends are respectively slidably connected with the base 4 and the top member 7. A servo motor 6 and a lead screw 11 driven by the servo motor output shaft are installed on the top member 7. The lead screw 11 passes through a member with a screw hole connected to a pair of support arm sliding ends 52b, namely a slider 12 with a rectangular cross section, to drive the top member 7 of the lifting platform to rise and fall relative to the base 4.

[0035] On the opposite side of the top member 7 and the base 4 of the lifting platform, a slideway 13 is provided which is parallel to the top member 7 and the base 4. The slideway 13 is respectively formed by a rectangular gap defined by a horizontal plate which is parallel to and connected to the top member 7 and the base 4. The slider 13 installed in the slideway is hinged to the sliding ends 51b and 52b of the support arms 51 and 52 to improve the lifting stability of the lifting platform. The screw hole passing through the lead screw 11 is provided on the slider 12.

[0036] The servo motor 6 drives the lead screw 11 to rotate, and the lead screw pushes or pulls the slider 12 to slide along the slideway 13. Figure 5 and Figure 7 As shown, the rising height of the top member 7 relative to the base 4 can be accurately and smoothly controlled, so that the contact between the tool and the grinder can be achieved and the grinding pressure can be adjusted, as well as the contact can be broken when descending.

[0037] like Figure 8 FIG. 1 is another embodiment of the lifting bracket. Figure 5 The embodiment shown differs in that Figure 8 The embodiment shown uses two pairs of scissor frames hinged together up and down, so that when the slider adopts the same stroke, the lifting height is higher than Figure 5 The embodiment shown can be doubled.

[0038] like Figure 8 As shown, there is a waterproof cover 14 (shown by the dotted line in the figure) on the side of the top member 7, which extends downward to cover the lead screw and the slider.

[0039] The top member 7 is a flat plate, or a frame structure, or the base of the clamp 8 is directly used as the top member 7. Similarly, the base 4 can be a flat plate or a frame structure.

[0040] In other embodiments, the number of the grinding tools may be 2, 6, 8, 10 or 12.

[0041] In addition, there are cooling water nozzles and corresponding water pumps, water tanks and other cooling water circulation and collection and filtration systems at the mold grinding position.

[0042] The above embodiments are only for those skilled in the art to understand, and any changes made to the schemes of the embodiments based on the same or similar principles all fall within the protection scope of the present utility model.

Claims

1. A tool lifting platform for a knife sharpener, characterized in that: It includes a top member and a base, and a vertically installed scissors frame is symmetrically arranged between the top member and the base. The scissors frame is composed of one or more pairs of support arms hinged in an X shape. The support arm positioning ends at the top and bottom ends of the scissors frame are respectively hinged to the top member and the base of the lifting platform, and the sliding ends of the support arms are respectively slidably connected to the top member and the base. A motor and a screw driven by the motor are installed on the top member or the base, and the screw passes through a member with a screw hole connected to the sliding end of the support arm to drive the top member of the lifting platform to rise and fall relative to the base.

2. The tool lifting platform according to claim 1, characterized in that: On the side opposite to the top component and the base of the lifting platform, a slideway parallel to the top component and the base is provided, a slider is installed in the slideway and is hinged to the end of the support arm, and the screw hole is provided on the slider.

3. The tool lifting platform according to claim 2, characterized in that: The sliding block has a rectangular cross section.

4. The tool lifting platform according to claim 1, characterized in that: The motor is a servo motor horizontally installed at the lower part of the top component of the lifting platform, and the motor output shaft is connected to the screw to form a screw drive mechanism.

5. The tool lifting platform according to claim 1, characterized in that: A waterproof cover extending downward is also installed around the top component.

6. An automatic knife sharpener, comprising a sharpener and a knife platform, characterized in that: The tool platform adopts the tool lifting platform for knife sharpeners as described in one of claims 1 to 5, the lifting platform is installed on a horizontal slide rail, a tool clamp is installed on the top of the lifting platform, and the clamping jaws of the tool clamp are arranged vertically; the grinding tool is fixedly installed on the side of the horizontal slide rail, the grinding surface of the grinding tool is arranged vertically and forms an acute angle with the plumb plane; the lifting height of the tool lifting platform is such that the tool contacts the grinding surface of the grinding tool when rising and loses contact with the grinding surface of the grinding tool when descending.

7. The automatic knife sharpener according to claim 6, characterized in that: The tool fixture adopts a bench clamp installed on the top of the lifting platform.

8. The automatic knife sharpener according to claim 6, characterized in that: The horizontal sliding of the lifting platform on the horizontal slide rail is driven by a motor and a lead screw.

9. The automatic knife sharpener according to claim 6, characterized in that: The grinding tools are arranged in two rows on both sides of the horizontal slide rail respectively, the grinding tools on both sides are arranged alternately, and the top of the grinding surface of the grinding tool passes over the vertical plane of the center line of the tool blade to the opposite side.

10. The automatic knife sharpener according to claim 9, characterized in that: The two rows of grinding tools are set with grinding mesh numbers from low to high from front to back.

Images