CN101623838A

CN101623838A - Electric sharpener

Info

Publication number: CN101623838A
Application number: CN200810029429A
Authority: CN
Inventors: 向军
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-07-08
Filing date: 2008-07-08
Publication date: 2010-01-13

Abstract

The invention discloses an electric sharpener, which comprises a shell, a motor, a grinding wheel, a fixed grinding wheel seat, a knife holder and a bumper. The motor is arranged inside the shell. The grinding wheel is concentrically connected with a drive shaft of the motor through the fixed grinding wheel seat. The knife holder is fixed on the outside wall of the shell. The grinding wheel is wrapped inside the knife holder. The knife holder is provided with a through knife slot allowing knives to insert to touch the surface of the grinding wheel. The bumper is fixed on the inner wall of the shell. The motor is fixed on the bumper. When grinding various knives, the sharpener can effectively keep the motor and the grinding wheel steady, and achieve good grinding effect.

Description

Electric knife sharpener

Technical field

The present invention relates to electric knife sharpener, particularly the knife sharpener that grinding wheel can be rotated by the motor-driven grinding wheel at a high speed.This knife sharpener can be used for grinding various types of cutters, for example steel knife, scissors, kitchen cutter, band tooth steel knife, flat mouthful of screwdriver or the like.

Background technology

Cutter is people's daily life, production, the common instrument in office field.As cutting element, its cutting edge can phenomenon turned, passivation occur because using wearing and tearing inevitably, therefore, keeps cutting edge roundness to be in the problem that the sharp state person of being to use often faces at any time.When adopting the hand lapping method previously, usually, cause tool lapping to become an irritating job because grinding efficiency is low and the big reason of labour intensity.Based on this, the knife sharpener of semi-automatic and automation has appearred in succession.Wherein, the knife sharpener of automation normally rotates at a high speed by driven by power driven by motor grinding wheel, makes cutting edge roundness contact wheel face finish the grinding for the treatment of knife milling tool under this rotation status.This automatic grinding device, its make generally is that motor and the grinding wheel that is connected with motor coaxle are set in casing, casing is made into knife rest corresponding to the part of grinding wheel, and the perforation cutter groove of its shape corresponding to steel knife, scissors, kitchen knife, screwdriver etc. is set on knife rest.When utilizing this automatic grinding device to whet a knife, connect power supply, the motor-driven grinding wheel rotates at a high speed, makes it form contact to finish automatic grinding with the grinding wheel surface in the cutting edge insertion cutter groove with cutter.This automatic grinding device, because grinding wheel is in the motion state of rotation at a high speed when whetting a knife, impact that is produced and vibrations are difficult to avoid.When this type of impact, shock transfer during, will cause the motor chatter, and and then cause grinding wheel and shake brokenly to motor.This phenomenon is unfavorable for the grinding effect of cutter on the one hand, may add the aging of speed motor on the one hand, even burn motor.Therefore, keep motor to be in duty stably, keeping grinding wheel to operate steadily becomes automatic grinding device urgent problem at present.

At the problems referred to above, relative counter measures has appearred, for example domestic utility application document CN200720048517.3 discloses a kind of electric knife grinder, and its formation comprises casing, body, motor, emery wheel, emery wheel holder, cutter truss, buffer.Motor is arranged in the body.Emery wheel is arranged at the leading section of body.Buffer is arranged between the main shaft of emery wheel holder and motor.The cutter truss is arranged at the peripheral of emery wheel and is connected with body.This knife sharpener is provided with the buffer of form of springs between the main shaft of emery wheel holder and motor.In this way, in the sharpening process, its grinding wheel can upwards form corresponding to moving back and forth between buffering area at motor drive shaft.Yet, because buffer can only be regulated the locus of grinding wheel on specific direction, therefore, the adaptive capacity of grinding wheel on other direction still awaits improving, and because buffer is arranged between the main shaft of emery wheel holder and motor, the cushioning effect of buffer generating can only reach in grinding wheel, therefore suffered impact, the vibrations of motor are still quite serious, and are also very important to the impact of grinding wheel by the suffered impact of motor, vibrational feedback.

Summary of the invention

The object of the invention is to provide a kind of electric knife sharpener.This knife sharpener can reduce the suffered impact of its motor, vibrations effectively, and then keeps motor and grinding wheel to operate steadily, and can make its grinding wheel have higher spatial attitude adaptability when diverse location grinds all kinds of cutter simultaneously.

According to above-mentioned purpose, electric knife sharpener of the present invention comprises casing, motor, grinding wheel, emery wheel holder, knife rest and buffer.Motor is placed in casing inside.Grinding wheel passes through the emery wheel holder with the coaxial connection of the driving shaft of motor.Knife rest is fixed on the casing outer wall.Grinding wheel is coated on knife rest inside.Knife rest is provided with and allows cutter to insert wherein to contact the perforation cutter groove on grinding wheel surface.Buffer is fixed on the casing inner wall.Motor is fixed on the buffer.

Aforementioned electric knife sharpener, its buffer can be the supports that adopts the soft silica gel preparation.

Aforementioned electric knife sharpener, the quantity of its support can be two.The position of two supports correspond respectively to motor shaft to two ends.

Preferably, aforementioned electric knife sharpener, its support is fixed on the casing inner wall by the form that insertion is arranged in the docking recess on the casing inner wall.

More preferably, aforementioned electric knife sharpener, its motor is arranged at two forms in the docking groove cave on the support respectively and is fixed on two supports by being plugged into.

Preferably, aforementioned electric knife sharpener, its support is fixed on the casing inner wall by the form that insertion is arranged in the docking recess on the casing inner wall, and motor is arranged at two forms in the docking groove cave on the support respectively and is fixed on two supports by being plugged into.

Electric knife sharpener of the present invention, between motor and casing, set buffer, that is under the coaxial state that is connected of grinding wheel and motor driving shaft, buffer is fixed on the casing inner wall, after being fixed in motor on the buffer, the impact that in milling cutter cutting edge process, produces when emery wheel, vibrations, when displacement is passed to motor, these impacts, vibrations, displacement is converted into the irregular chatter of motor itself and the displacement on all directions, and then the active state of formation motor in the certain space radius, this change in location of motor all will be slowed down and absorbed by buffer, make motor still can keep stable operation within certain radius of action.In other words, between motor and casing, buffer provides and has allowed motor to carry out the space of change in location within the specific limits, motor in this spatial dimension when all directions are done irregular oscillation, its suffered reaction will be alleviated or offset by buffer, thereby a year assurance motor can turn round steadily.Can guarantee that so, also grinding wheel adapts to the spatial attitude for the treatment of knife milling tool from different directions on one's own initiative in the activity space scope that buffer provides.

The drawing explanation

Fig. 1 electric knife sharpener perspective view of the present invention.

Fig. 2 electric knife sharpener of the present invention fragmentary, perspective view one.

Fig. 3 electric knife sharpener of the present invention fragmentary, perspective view two.

Fig. 4 electric knife sharpener partial, exploded perspective view one of the present invention.

Fig. 5 electric knife sharpener of the present invention fragmentary, perspective view three.

Fig. 6 electric knife sharpener partial, exploded perspective view two of the present invention.

Fig. 7 electric knife sharpener of the present invention fragmentary, perspective view four.

The specific embodiment

Describe the preferred specific embodiment of electric knife sharpener of the present invention in detail below in conjunction with accompanying drawing.In institute's drawings attached, identical Reference numeral is used to refer to identical parts, feature or structure.Embodiment introduce in the process at concrete structure or parts, only understand the reference illustration of electric knife sharpener of the present invention as those skilled in the art, those skilled in the art can also design do not exceed electric knife sharpener technical scope of the present invention and essence various and be equal to or the similar techniques structure under the enlightenment of this technical scheme.Thus, be unfavorable if limit the protection domain that electric knife sharpener claim of the present invention included with this preferred exemplary illustration.The technical scheme that is equal to or is similar to electric knife sharpener of the present invention still belongs to the protection domain of electric knife sharpener claim of the present invention.In addition, for simple and clear needs, the applicant has here omitted or has simplified description to known function and structure.

Referring to Fig. 1～7, show the configuration state of electric knife sharpener A and each building block thereof.Wherein, Fig. 1 shows the mode of appearance of electric knife sharpener A, Fig. 2 shows the internal structure form of electric knife sharpener A, Fig. 3 shows the installation constitution state of the motor 2 of electric knife sharpener A, Fig. 4 shows the installation constitution relation of the motor 2 of electric knife sharpener A, Fig. 5 shows the installment state of the casing 1 of electric knife sharpener A, and Fig. 6 shows the installation constitution relation of the casing 1 of electric knife sharpener A, and Fig. 7 shows the structural regime of the casing 1 of electric knife sharpener A.

At first, consult Fig. 1,2, electric knife sharpener A mainly is made of following parts: casing 1, motor 2, grinding wheel 3, emery wheel holder 4, knife rest 5 and buffer 6.In the present embodiment, has structural form as described below between these parts.

See Fig. 1,2,5,6,7, for other parts of knife sharpener A are installed easily, casing 1 is split into three can distinguish the shell wall that integral molded plastic is shaped, i.e. first shell wall 101, second shell wall 102 and the 3rd shell wall 103.Casing 1 integral body can be used metal material, and for example stainless steel etc. also can use engineering plastics.First shell wall 101, second shell wall 102 and the 3rd shell wall 103 are provided with several and dock tenon 104 and butt joint mortise 106 and bolt butt joint post 107 mutually one to one near the inwall edge that they are used to mutually combine.First shell wall 101, second shell wall 102 and the 3rd shell wall 103 threes by butt joint button 104, butt joint mortise 106 and bolt butt joint post 107 etc. buckle mutually tie together after, become complete casing 1 shown in Figure 5, simultaneously, in casing 1, then be formed for holding the cavity of motor 2.In order to keep the integrality of casing 1, after fastening mutually, first shell wall 101, second shell wall 102 and the 3rd shell wall 103 also dismountable connecting plate 109 can be set on the diapire of casing 1 usually.After being individually fixed in the two ends of connecting plate 109 on first shell wall 101 and second shell wall 102 by tap bolt 110 fastening means such as grade, can strengthen the connection steadiness between first shell wall 101 and second shell wall 102, also help to improve the structural stability of casing 1.On casing 1, be provided with the circular hole 105 of a perforation, and circular hole 105 protrudes from outside the casing 1 with the form of cylindrical tube.Circular hole 105 provides the spatial accommodation that is used to hold emery wheel holder 4.The knife rest 5 of circular lid shape just is set up on the outer cylindrical wall of circular hole 105 regularly.

Referring to Fig. 2,3,4, emery wheel holder 4 is the axle sleeves that are fixed in coaxially on the driving shaft 201 of motor 2, and it passes to grinding wheel 3 to the rotation torque that motor 2 produces.Grinding wheel 3 is fixed on the emery wheel holder 4 by the fastening means of bolt 301 and so on.Under the assembly confined state, grinding wheel 3 keeps coaxial state with motor 2, and so, the high speed rotation that motor 2 is produced under the electric energy effect of power lead 202 inputs will be converted into rotatablely moving of grinding wheel 3.Power lead 202 in being introduced in casing 1 inner chamber after, be fixed in by bolt 111 near the power input mouth of motor 2.

Referring to Fig. 1,2, as described above, knife rest 5 rounded cap-like.It has the shirt rim 501 of cylinder tube shape, and its axial end is in open state, and the other end is by transverse end wall 502 sealings.Under installment state, knife rest 5 is placed on the outer wall of circular hole 105 by shirt rim 501, and grinding wheel 3 is coated in the inner chamber of knife rest 5.The mode that can adopt tongue-and-groove to cooperate between the outer wall of knife rest 5 and circular hole 105 realizes the activity combination of the two, so that dismounting knife rest 5 in time, keeps the flexibility of its installation or dismounting, convenient for maintaining and change grinding wheel 3.On the shirt rim 501 and transverse end wall 502 of knife rest 5, be adapted to the grinding requirement of different shape cutter, be respectively arranged with the independent cutter groove 503 that several connect separately, so that cutting edge roundness can touch grinding wheel 3 by these cutter grooves 503, and then finishes the grinding of cutting edge roundness in the rotary course of grinding wheel 3.

Referring to Fig. 2,3,4, buffer 6 is the flat backbone block 602 that adopt the soft silica gel preparation.Buffer 6 is provided with docking groove cave 601.Docking groove cave 601 is circular cell bodies of recessed flat backbone block 602, and its diameter is embedded in the docking groove cave 601 so that motor 2 axial ends can be pressed corresponding to the lateral dimension of motor 2.Docking groove cave 601 can connect flat backbone block 602, also can be the part of only recessed flat backbone block 602.In the present embodiment, adopted two buffers 6 to come two axle heads of support motor 2.To being used for two buffers 6 of support motor 2 axial forward end and tail end, all adopt its docking groove cave 601 only to go deep into the mode of flat backbone block 602 parts.For being used for the buffer 6 of support motor 2 axial forward end, consider the driving shaft 201 of being convenient to install motor 2, grinding wheel 3, emery wheel holder 4 threes' needs, set up the passage 603 that connects in this front end buffer 6 corresponding to the transverse center position in docking groove cave 601, so that reserve the space that driving shaft 201 passes front end buffer 6, make things convenient for the installation of grinding wheel 3 and emery wheel holder 4.Passage 603 keeps coaxial state with support motor 2.When assembling buffer 6 and motor 2, in the docking groove cave 601 that front end that motor 2 is axial and tail end are pressed into two buffers 6 respectively, with pad 604 and bolt 605 two buffers 6 are individually fixed in motor 2 axial leading section and tail end, 201 outsides that pass front end buffer 6 through passage 603 of the driving shaft of motor 2 again.

Referring to Fig. 2,3,4,6,7, on the inwall of first shell wall 101 and second shell wall 102, be respectively arranged with a plurality of docking recess 108.Be used for the position of support motor 2 corresponding to two buffers 6, docking recess 108 also therewith the position adapt.That is to say that position and two buffer 6 position that be used for support motor 2 of docking recess 108 on first shell wall 101 and second shell wall 102 adapts.Like this, under buffer 6 had been fixed in state on the motor 2, buffer 6 can be crimped onto in the docking recess 108 by its corresponding feet 606, thereby motor 2 is fixed in casing 1 inside by buffer 6.So, combined one when whole at motor 2, grinding wheel 3 and emery wheel holder 4, it be with will producing direct contact between the inwall of casing 1, but form mediate contacts by buffer 6, as a result, the chatter of motor 2 formation will be absorbed effectively by buffer 6.Under this structural regime, when the user utilizes knife sharpener A to carry out tool lapping, impact on the different directions that cutter contact grinding wheel 3 produces, vibrations, displacement or the like effect, can both effectively dissolve by buffer 6, thereby make grinding wheel 3 when the different cutter that grinding comes in every shape, can adjust contact angle between cutter and grinding wheel 3 working faces automatically, the final grinding effect that improves cutter, the probability that also corresponding reduction motor 2 grinding wheels 3 are impaired.

Claims

1. electric knife sharpener, comprise casing, motor, grinding wheel, emery wheel holder, knife rest and buffer, described motor is placed in described casing inside, described grinding wheel by described emery wheel holder with the coaxial connection of the driving shaft of described motor, described knife rest is fixed on the described casing outer wall, described grinding wheel is coated on described knife rest inside, described knife rest is provided with and allows cutter to insert wherein to contact the perforation cutter groove on described grinding wheel surface, it is characterized in that described buffer is fixed on the described casing inner wall, described motor is fixed on the described buffer.

2. electric knife sharpener according to claim 1 is characterized in that described buffer is the support of soft silica gel preparation.

3. electric knife sharpener according to claim 2, the quantity that it is characterized in that described support is two, the position of two described supports correspond respectively to described motor shaft to two ends.

4. according to claim 2 or 3 described electric knife sharpeners, it is characterized in that described support is fixed on the described casing inner wall by the form that insertion is arranged in the docking recess on the described casing inner wall.

5. electric knife sharpener according to claim 3 is characterized in that described motor is arranged at two forms in the docking groove cave on the described support respectively and is fixed on two described supports by being plugged into.

6. electric knife sharpener according to claim 2, it is characterized in that described support is fixed on the described casing inner wall by the form that insertion is arranged in the docking recess on the described casing inner wall, described motor is arranged at two forms in the docking groove cave on the described support respectively and is fixed on two described supports by being plugged into.