WO2023101169A1 - Dispositif de fixation de lame de meuleuse pour meuleuse à main - Google Patents

Dispositif de fixation de lame de meuleuse pour meuleuse à main Download PDF

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Publication number
WO2023101169A1
WO2023101169A1 PCT/KR2022/014239 KR2022014239W WO2023101169A1 WO 2023101169 A1 WO2023101169 A1 WO 2023101169A1 KR 2022014239 W KR2022014239 W KR 2022014239W WO 2023101169 A1 WO2023101169 A1 WO 2023101169A1
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WO
WIPO (PCT)
Prior art keywords
grinder
drive shaft
plate
holder
grinder blade
Prior art date
Application number
PCT/KR2022/014239
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English (en)
Korean (ko)
Inventor
서보상
Original Assignee
주식회사 삼한기업
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Filing date
Publication date
Application filed by 주식회사 삼한기업 filed Critical 주식회사 삼한기업
Publication of WO2023101169A1 publication Critical patent/WO2023101169A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
    • B24B23/02—Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B45/00—Means for securing grinding wheels on rotary arbors

Definitions

  • the present invention relates to a grinder blade fixing device for a hand grinder, and more particularly, to a grinder blade fixing device used to easily mount or remove a grinder blade such as a cutting stone, abrasive stone, or brush from a hand grinder side.
  • the hand grinder used for industrial machinery, shipbuilding, and other various instruments smooths the rough surface of the firstly processed part or the part to be painted, or the first It is used for purposes such as partially cutting and cutting raw materials.
  • a hand grinder operates a grinder shaft at high speed by receiving power from an electric motor or compressor, and also cuts objects made of stone or metal by a cutting or abrasive disc mounted on the grinder shaft. It is used for finishing work by polishing the surface of the machine, polishing, grinding off unprocessed parts, edges, etc., or cutting and cutting.
  • the grinder blade of the hand grinder is used by attaching it to the grinder shaft by inserting it into the grinder shaft and fixing it using a nut, or by fastening a bolt to the grinder shaft to fix it.
  • Such a grinder blade has a short life cycle and must be frequently replaced during cutting or polishing operations.
  • the present invention has been devised in view of this point, and the grinder blade can be firmly fixed by using the engagement and release action between the lower platen fixed to the grinder shaft and the upper platen rotated together with the grinder blade, and at the same time, the grinder
  • the grinder By implementing a new type of grinder blade fixing device that can easily loosen the fixed state of the blade, workability related to grinder blade replacement work can be improved, and all vibrations or vibrations that occur during grinding work can be absorbed so that the operator can
  • the purpose is to provide a grinder blade fixing device for a hand grinder so that work can be done comfortably and safely.
  • the grinder blade fixing device of the hand grinder provided by the present invention has the following characteristics.
  • a housing in which a drive shaft through-hole is formed in the center and a first step at the bottom and a second step at the top are sequentially formed inside, and the first step of the housing At the same time, it is supported by being placed on the chin, coupled to the grinder drive shaft and rotatable together with the grinder drive shaft, a drive shaft through hole is formed in the center, and an inclined lower pressure protrusion that rises to one side along the circumferential direction is formed on the upper surface.
  • While supported by being placed on the second step of the housing it is coupled to the housing and at the same time in close contact with the lower pressing plate to be rotatable with the lower pressing plate as well as the housing.
  • An upper pressure plate having an upper pressure protrusion formed with an inclined upper pressure protrusion that rises to one side while following the circumferential direction in a structure facing the beam, and a drive shaft fastening hole that comes into contact with the upper surface of the grinder blade and is screwed to the grinder drive shaft in the center. and a spring interposed between the upper and lower pressing plates to elastically support the upper and lower pressing plates upward and downward.
  • the upper and lower pressure plates and the entire housing including the holder are coupled to the drive shaft, and at the same time, the upper pressure stone of the upper pressure plate is caused by the expansion force exerted by the spring.
  • the lower pressing plate, the lower pressing protrusion, and the upper pressing protrusion of the upper pressing plate may be formed of three maintaining an interval of 120° along the circumferential direction of the pressing plate.
  • protrusions formed in a circular band shape may be formed on the upper and lower surfaces of the elastic plate along the circumference of the drive shaft through hole, and the elastic plate may be made of a rubber material, a plastic material, a silicon material, or the like.
  • the holder may include at least one pair of tool holes through which the holder can be turned by hooking a tool when fastening or disengaging.
  • a drive shaft through-hole is formed in the center, and a housing in which a lower first step and an upper second step are sequentially formed inside, and At the same time, it is supported by being placed on the first step, coupled to the grinder drive shaft, and can rotate together with the grinder drive shaft.
  • a drive shaft through hole and a drive shaft coupling groove are formed in the center.
  • the lower pressure plate on which the protrusion is formed and the second step of the housing are supported and coupled to the housing while being in close contact with the lower pressure plate to rotate together with the housing and the lower pressure plate, and a drive shaft through hole is formed in the center, and the bottom
  • the upper pressing plate formed with the lower pressing projection and the upper pressing projection forming an opposing structure facing each other and rising to one side along the circumferential direction, coupled to the upper surface of the upper pressing plate and at the same time in contact with the lower surface of the grinder blade and an elastic plate having a drive shaft through hole formed therein, and a holder in contact with an upper surface of the grinder blade and having a drive shaft fastening hole screwed to the grinder drive shaft formed at the center thereof.
  • the elastic plate, the upper pressure plate, and the housing simultaneously rotate and simultaneously press the upper portion of the upper pressure plate.
  • the upper and lower pressure plates can be engaged with each other. It is characterized in that the upper and lower pressing plates can be released from each other as the upper pressing plate and the housing rotate together and the upper pressing projection of the upper pressing plate moves downward along the lower pressing projection of the lower pressing plate.
  • the lower pressing plate, the lower pressing protrusion, and the upper pressing protrusion of the upper pressing plate may be formed of three maintaining an interval of 120° along the circumferential direction of the pressing plate.
  • protrusions formed in a circular band shape may be formed on the upper and lower surfaces of the elastic plate along the circumference of the drive shaft through hole, and the elastic plate may be made of a rubber material, a plastic material, a silicon material, or the like.
  • the holder may include at least one pair of tool holes through which the holder can be turned by hooking a tool when fastening or disengaging.
  • the grinder blade fixing device of the hand grinder provided by the present invention has the following effects.
  • the grinder blade can be When replacing, the operator can easily replace the grinder blade without much effort.
  • the elastic plate made of rubber absorbs the vibration, shock, and vibration that occur during the operation of the grinder blade, the operator can work comfortably and accurately, such as reducing the vibration or shaking transmitted to the operator. This makes it possible to ensure precision processing as well as excellent processing quality.
  • FIG. 1 to 4 are perspective views showing a grinder blade fixing device of a hand grinder according to an embodiment of the present invention
  • FIG. 5 is a cross-sectional view showing an engagement and release state between an upper pressurizing plate and a lower pressurizing plate in a grinder blade fixing device of a hand grinder according to an embodiment of the present invention.
  • 6 to 8 are cross-sectional and perspective views showing mounting states of grinder blades using the grinder blade fixing device of the hand grinder according to an embodiment of the present invention.
  • FIG. 9 to 12 are perspective views showing a grinder blade fixing device of a hand grinder according to another embodiment of the present invention.
  • FIG. 13 is a cross-sectional view showing engagement and release states between an upper pressurizing plate and a lower pressurizing plate in a grinder blade fixing device of a hand grinder according to another embodiment of the present invention.
  • FIG 14 to 16 are cross-sectional and perspective views showing mounting states of grinder blades using the grinder blade fixing device of the hand grinder according to another embodiment of the present invention.
  • FIG. 1 to 4 are perspective views illustrating a grinder blade fixing device of a hand grinder according to an embodiment of the present invention.
  • the upper pressing protrusion of the upper pressing plate In addition to moving upward along the lower pressing protrusion of the lower pressing plate, the upper and lower pressing plates can be tightly engaged with each other as the spring expansion force acts, and when removing the grinder blade from the hand grinder, release the holder from the grinder drive shaft and move the holder to the opposite side.
  • the upper pressing protrusion of the upper pressing plate rides the lower pressing protrusion of the lower pressing plate and moves downward, and as the spring is compressed, the binding force between the upper and lower pressing plates disappears, resulting in a structure in which they can be easily released from each other.
  • the grinder blade fixing device of the hand grinder includes a housing 13 as a means for accommodating the upper and lower pressing plates 19 and 17 .
  • the housing 13 has a cylindrical shape in which a drive shaft through-hole 10a is formed in the center, and the housing 13 is arranged concentrically inside the housing 13 to form a two-stage stepped structure. (11) and the upper second step step 12 are formed in turn.
  • first stepped jaw 11 is made of a relatively large diameter compared to the second stepped jaw 12, and the lower pressure plate 17 is placed on and supported on the first stepped jaw 11 at this time.
  • the second step step 12 is made of a relatively small diameter compared to the first step step 11, and the upper pressure plate 19 can be supported by being placed on the second step step 12 at this time.
  • the lower pressure plate 17 and the upper pressure plate 19 are sequentially inserted into the housing 13 from below, they are coupled to the side of the housing 13 and can be rotated together. At this time, the upper pressure plate 19 and The lower pressure plates 17 come into contact with each other in a structure capable of sliding in the rotational direction.
  • the grinder blade fixing device of the hand grinder includes a lower pressure plate 17 as a means for providing a pressing force together with an upper pressure plate 19 to fix the grinder blade 20 .
  • the lower pressure plate 17 is formed in the shape of a disk having a drive shaft through hole 10d in the center, and this lower pressure plate 17 is fitted to the lower end of the grinder drive shaft 14 using the drive shaft through hole 10d. do.
  • the lower pressure plate 17 can be supported by being placed on the first stepped jaw 11 while being accommodated in the inside of the housing 13 .
  • an inclined lower pressing protrusion 16 is formed on the edge of the upper surface of the lower pressing plate 17 and rises to one side along the circumferential direction. While in contact with the upper pressing protrusion 18, it serves to push the upper pressing plate 19 including the upper pressing protrusion 18 upward, and by this pressing action, the fixed state of the grinder blade 20 can be strengthened there will be
  • the lower pressing protrusions 16 formed on the upper surface of the lower pressing plate 17 are made of two opposite sides, for example, formed at positions facing each other with a phase difference of 180 °, or preferably can be made up of three balanced positions at three points while forming an angle of 120 °.
  • the lower pressing protrusion 16 protrudes along an arc-shaped trajectory, and at this time, the upper end of the lower pressing protrusion 16 is formed with an upper slope that rises along the circumferential direction.
  • each upper inclined surface formed on the lower pressing protrusion 16 can form an upwardly inclined shape from bottom to top in the same direction with respect to the rotational direction of the grinder blade along the circumferential direction of the disk.
  • the upper inclined surface of the lower pressing projection 16 and the lower inclined surface of the upper pressing projection 18 of the upper pressing plate 19, which will be described later, may be formed as inclined surfaces facing each other.
  • the upper pressing plate 19 rotates as the holder 23 is turned, the lower inclined surface of the upper pressing protrusion 18 matches the upper inclined surface of the lower pressing protruding part 16. As it comes into contact, it can slide upward along the inclined structure, and at this time, the upper pressing plate 19 is formed by the upper inclined surface of the lower pressing protrusion 16 and the lower inclined surface of the upper pressing protrusion 18 in contact with each other. As it is pushed upward, it is possible to press the grinder blade 20.
  • the upper pressure plate 19 is pushed upward according to the pressure between the lower pressure protrusion 16 and the upper pressure protrusion 18, and between the upper pressure plate 19 and the holder 23 via the elastic plate 21 Since the grinder blade 20, which is inserted into and fixed by compression, is tightly fixed, vibration of the grinder blade 20 can be prevented, and therefore, when cutting a material using the grinder blade 20, vibration and the like are excluded. As the grinder blade 20 progresses in a straight line, excellent cutting quality can be ensured, such as being able to accurately cut the material, and worker's safety, such as preventing injury, etc., because shaking during work is excluded can be protected as much as possible.
  • the grinder blade fixing device of the hand grinder includes an upper pressure plate 19 as a means for providing a pressing force together with a lower pressure plate 17 to fix the grinder blade 20 .
  • the upper pressure plate 19 is in the form of a disk having a drive shaft through hole 10b in the center, and the upper pressure plate 19 is accommodated inside the housing 13 and placed on the second step 12 so that it can be supported do.
  • a circular seating groove 27 is formed along the circumference of the drive shaft through hole 10b at the center of the upper surface of the upper pressure plate 19, and the seating groove 27 at this time is formed on the elastic plate 21
  • the protrusions 24 located therein can be fitted snugly.
  • an inclined upper pressing protrusion 18 is formed on the edge of the lower surface of the upper pressing plate 19 and rises to one side along the circumferential direction. As it comes into contact with the lower pressing protrusion 16, the entire upper pressing plate 19 including the upper pressing protrusion 18 is pushed upward, and thus the fixed state of the grinder blade 20 can be strengthened by this pressing action.
  • At least one upper pressing protrusion 18 is formed protruding from the edge of the pressing plate along the circumferential direction on the bottom surface of the upper pressing plate 19, and the upper pressing protrusion 18 thus formed is attached to the lower pressing plate 17.
  • One-to-one matching with the lower pressing protrusion 16 can be achieved.
  • the upper pressing protrusion 18 may be formed of two opposite sides, for example, formed at positions facing each other while having a phase difference of 180 °.
  • the upper pressing protrusion 18 may be formed of three balanced positions at three points while forming an angle of 120 °.
  • the upper pressing protrusion 18 protrudes along an arc-shaped trajectory, and at this time, a bottom inclined surface is formed on the lower surface of the upper pressing protrusion 18 to increase along the circumferential direction.
  • each lower inclined surface formed on the upper pressing protrusion 18 can form an upwardly inclined shape from bottom to top in the same direction with respect to the rotational direction of the grinder blade along the circumferential direction of the disk.
  • the lower inclined surface of the upper pressing protrusion 18 and the upper inclined surface of the lower pressing protruding part 16 may be formed as inclined surfaces facing each other.
  • the upper pressure plate 19 is pushed upward according to the pressure between the lower pressure protrusion 16 and the upper pressure protrusion 18, and between the upper pressure plate 19 and the holder 23 via the elastic plate 21 As the grinder blade 20, which is inserted into and fixed by compression, is closely fixed, shaking of the grinder blade 20 can be prevented.
  • the grinder blade fixing device of the hand grinder strengthens the bite of the grinder blade 20 and at the same time facilitates the loosening of the grinder blade 20, and also reduces vibration generated during rotation of the grinder blade 20.
  • An elastic plate 21 is included as a means for reducing.
  • the elastic plate 21 is in the form of a disk having a drive shaft through hole 10c in the center thereof, and is coupled to the upper surface of the upper pressure plate 19 and is installed in a structure in contact with the lower surface of the grinder blade 20.
  • protrusions 24 formed in a circular band shape are formed on the upper and lower surfaces of the elastic plate 21 along the circumference of the drive shaft through-hole 10c, and the upper protrusion 24 at this time is a grinder blade 20 On the hole side of the center of the lower protrusions 24 are fitted into and accommodated on the side of the seating grooves 27 in the upper pressure plate 19, respectively.
  • the elastic plate 21 may be made of a rubber material, a plastic material, a silicon material, or the like.
  • the elastic plate 21 is compressed while being pressed by the grinder blade 20, and by the compression action of the elastic plate 21 pressed in this way, Since the holder 23 can be tightened more tightly, the fixed state of the grinder blade 20 can be firmly maintained.
  • the compressed elastic plate 21 restores the restoring force and removes the upper pressure plate 19. It pushes down, and eventually assists in releasing the binding between the upper and lower pressing protrusions 18 and 16, which were tightly engaged, and at the same time, the pressing force by the upper pressing plate 19, which had been raised, is released, loosening the fastening state of the holder 23
  • the holder 23 can be easily released.
  • the elastic plate 21 serves to accommodate the clamping force when the holder 23 is fastened and to absorb the vibration when the grinder blade rotates, and the grinder blade pressed down when the holder 23 is fastened ( 20), it is possible to exert elastic force in the vertical direction while being slightly pressed, and eventually, the elastic force exerted by the elastic plate 21 partially accommodates the fastening force when fastening the holder, and the entire grinder blade 20 is tightly bound.
  • the holder 23 can also be easily released by the loosening between the upper and lower pressing protrusions 18 and 16 as well as the elastic force (restoring force) exerted by the elastic plate 21.
  • the elastic plate 21 serves to absorb vibration, shaking, shock, etc. generated during grinder work, and eventually reduces the shaking transmitted to the operator's hands and arms, so that the operator works with the grinder in a more comfortable state. will be able to do
  • the grinder Wear of the elastic plate 21 can be prevented as much as possible, such as completely eliminating the problem of wear due to rotational friction during operation, and eventually the replacement cycle of the elastic plate 21 can be increased, thereby increasing the convenience and efficiency of work. It is possible to ensure continuity (for example, continuity that can prevent work from being stopped due to frequent replacement of elastic plates).
  • the grinder blade fixing device of the hand grinder includes a holder 23 as a means for substantially fixing the grinder blade 20 .
  • the holder 23 is in the form of a disc having a drive shaft fastening hole 22 at the center, and is screwed to the grinder drive shaft 14 using the drive shaft fastening hole 22 and is in contact with the upper surface of the grinder blade 20. while fixing the grinder blade 20.
  • At least one pair of tool holes 25 capable of turning the holder 23 by hanging a tool are formed in the holder 23 when fastening or disengaging for mounting and dismounting of the grinder blade 20. .
  • These tool holes 25 can sometimes be selectively used in situations such as a state in which the holder 23 is tightly bitten.
  • the grinder blade fixing device of the hand grinder includes a spring 28 as a means for providing elasticity up and down while spaced apart the upper pressure plate 19 and the lower pressure plate 17 from each other.
  • the spring 28 is positioned between the upper pressing plate 19 and the lower pressing plate 17 and serves to bind the upper pressing plate 19 and the lower pressing plate 17 while pushing the upper and lower pressing plates 19 and 17 up and down.
  • the spring 28 is a coiled spring having vertical spring ends 29a and 29b on both sides, and the spring 28 is interposed between the lower surface of the upper pressure plate 19 and the upper surface of the lower pressure plate 17 In addition to being arranged concentrically, it is installed in a structure fitted into the spring holes 30a and 30b formed in the upper pressure plate 19 and the lower pressure plate 17 using the spring ends 29a and 29b on both sides.
  • the spring 28 installed in this way has a restoring force when pressed in the vertical direction and a restoring force when twisted in the rotational direction.
  • the spring 28 applies force in the vertical and rotational directions while exerting a restoring force, and therefore, the upper pressure plate 19 and the lower pressure plate ( 17), respectively, have the upper and lower pressing projections 18 and the lower inclined surfaces of the lower inclined surfaces and the upper inclined surfaces (eg, the ends including the largest protruding parts of the inclined surfaces) through the end portion) while abutting each other tightly
  • the upper and lower pressure plates 19 and 17, the holder 23, etc. are tightly bound to firmly maintain the fixed state of the grinder blade 20.
  • the upper pressure plate 19 rotates while compressing the spring 28 and the upper pressure plate
  • the upper pressing protrusion (18) of (19) slides down on the lower pressing protrusion (16) of the lower pressing plate (17), and eventually the binding between the upper and lower pressing protrusions (18, 16), which were tightly engaged, is released and rises at the same time.
  • the pressing force by the upper pressure plate 19 is released, the clamped state of the holder 23 is loosened, and the holder 23 can be easily released.
  • 6 to 8 are cross-sectional and perspective views illustrating mounting states of grinder blades using the grinder blade fixing device of the hand grinder according to an embodiment of the present invention.
  • FIGS. 6 to 8 a process of assembling the grinder blade fixing device 110 and the grinder blade 20 to the grinder drive shaft 14 of the hand grinder 100 is shown here.
  • the grinder blade fixing device 110 is fitted to the grinder drive shaft 14 of the hand grinder 100, and the grinder blade 20 is fitted thereon.
  • the grinder blade 20 when the holder 23 is rotated while being tightened more tightly, the grinder blade 20, the elastic plate 21, the upper and lower pressure plates 19 and 17, the spring 28, and the entire housing 13 also move in the same direction.
  • the lower inclined surface of the upper pressing protrusion 18 of the upper pressing plate 19 climbs the upper inclined surface of the lower pressing protrusion 16 of the lower pressing plate 17, and together with this, the upper pressing plate 19 , while the elastic plate 21 rises, the side of the grinder blade 20 is pressed.
  • the spring 28 at this time can also exert an elastic force in the upward direction.
  • the upper pressing protrusion 18 of the upper pressing plate 19 climbs the lower pressing protrusion 16 of the lower pressing plate 17 to some extent, for example, about 1/2 to 2/3 of the entire section of the inclined surface.
  • the holder 23 at this time is also not tightened anymore and becomes fully engaged, and eventually the grinder blade 20 is fixed to the grinder drive shaft 14 and the grinder blade ( 20) is installed.
  • the spring 28 can be compressed while being pressed by the upper pressure plate 19 that comes down while rotating.
  • the upper platen 19 is moved again by the restoring force of the spring 28 It is pushed upward, and at this time, the upper pressing plate 19 and the lower pressing plate 17 each have the upper pressing protrusion 18 and the lower pressing protrusion 16 at the end of the lower inclined surface and upper inclined surface (eg, the inclined surface The end portion with the largest protrusion) allows it to be positioned in an abutting state (eg, in this case, a slightly less bite than when the holder is tightened).
  • FIGS. 9 to 12 are perspective views illustrating a grinder blade fixing device of a hand grinder according to another embodiment of the present invention.
  • the grinder blade fixing device of the hand grinder turns the holder to one side while fastening the drive shaft fastening hole of the holder to the grinder drive shaft when the grinder blade is mounted on the hand grinder.
  • the upper pressing protrusion moves upward along the lower pressing protrusion of the lower pressing plate, the upper and lower pressing plates can be tightly engaged with each other, and when the grinder blade is removed from the hand grinder, the holder's drive shaft fastening hole is released from the grinder drive shaft.
  • the upper pressing protrusion of the upper pressing plate rides on the lower pressing protrusion of the lower pressing plate and moves downward, so that the upper and lower pressing plates can be easily released from each other.
  • the grinder blade fixing device of the hand grinder includes a housing 13 as a means for accommodating the upper and lower pressing plates 19 and 17 .
  • the housing 13 has a cylindrical shape in which a drive shaft through-hole 10a is formed in the center, and the housing 13 is arranged concentrically inside the housing 13 to form a two-stage stepped structure. (11) and the upper second step step 12 are formed in turn.
  • first stepped jaw 11 is made of a relatively large diameter compared to the second stepped jaw 12, and the lower pressure plate 17 is placed on and supported on the first stepped jaw 11 at this time.
  • the second step step 12 is made of a relatively small diameter compared to the first step step 11, and the upper pressure plate 19 can be supported by being placed on the second step step 12 at this time.
  • the housing 13 and the lower pressure plate 17 are slidably coupled to each other in the rotational direction, and the housing 13 and the upper pressure plate 17 form a press-fit structure and are integrally coupled so that they can rotate together. .
  • the grinder blade fixing device of the hand grinder includes a lower pressure plate 17 as a means for providing a pressing force together with an upper pressure plate 19 to fix the grinder blade 20 .
  • the lower pressurizing plate 17 has a disk shape having a driving shaft through-hole 10d at the center thereof, and a rectangular driving shaft coupling groove 15 is formed at the center of the lower surface of the lower pressurizing plate 17 at this time.
  • the lower pressure plate 17 is coupled to the rectangular shaft base 26 at the lower end of the grinder drive shaft 14 using the drive shaft coupling groove 15.
  • the lower pressure plate 17 also rotates due to the engaging structure between the drive shaft coupling groove 15 and the shaft base 26.
  • the lower pressure plate 17 can be supported by being placed on the first stepped jaw 11 while being accommodated in the inside of the housing 13 .
  • an inclined lower pressing protrusion 16 is formed on the edge of the upper surface of the lower pressing plate 17 and rises to one side along the circumferential direction. While in contact with the upper pressing protrusion 18, it serves to push the upper pressing plate 19 including the upper pressing protrusion 18 upward, and by this pressing action, the fixed state of the grinder blade 20 can be strengthened there will be
  • the lower pressing protrusions 16 formed on the upper surface of the lower pressing plate 17 are made of two opposite sides, for example, formed at positions facing each other with a phase difference of 180 °, or preferably can be made up of three balanced positions at three points while forming an angle of 120 °.
  • the lower pressing protrusion 16 protrudes along an arc-shaped trajectory, and at this time, the upper end of the lower pressing protrusion 16 is formed with an upper slope that rises along the circumferential direction.
  • each upper inclined surface formed on the lower pressing protrusion 16 can form an upwardly inclined shape from bottom to top in the same direction with respect to the rotational direction of the grinder blade along the circumferential direction of the disk.
  • the upper inclined surface of the lower pressing projection 16 and the lower inclined surface of the upper pressing projection 18 of the upper pressing plate 19, which will be described later, may be formed as inclined surfaces facing each other.
  • the upper pressure plate 19 is pushed upward according to the pressure between the lower pressure protrusion 16 and the upper pressure protrusion 18, and between the upper pressure plate 19 and the holder 23 via the elastic plate 21 Since the grinder blade 20, which is inserted into and fixed by compression, is tightly fixed, vibration of the grinder blade 20 can be prevented, and therefore, when cutting a material using the grinder blade 20, vibration and the like are excluded. As the grinder blade 20 progresses in a straight line, excellent cutting quality can be ensured, such as being able to accurately cut the material, and worker's safety, such as preventing injury, etc., because shaking during work is excluded can be protected as much as possible.
  • the grinder blade fixing device of the hand grinder includes an upper pressure plate 19 as a means for providing a pressing force together with a lower pressure plate 17 to fix the grinder blade 20 .
  • the upper pressure plate 19 is in the form of a disk having a drive shaft through hole 10b in the center, and the upper pressure plate 19 is accommodated inside the housing 13 and placed on the second step 12 so that it can be supported do.
  • a circular seating groove 27 is formed along the circumference of the drive shaft through hole 10b at the center of the upper surface of the upper pressure plate 19, and the seating groove 27 at this time is formed on the elastic plate 21
  • the protrusions 24 located therein can be fitted snugly.
  • an inclined upper pressing protrusion 18 is formed on the edge of the lower surface of the upper pressing plate 19 and rises to one side along the circumferential direction. As it comes into contact with the lower pressing protrusion 16, the entire upper pressing plate 19 including the upper pressing protrusion 18 is pushed upward, and thus the fixed state of the grinder blade 20 can be strengthened by this pressing action.
  • At least one upper pressing protrusion 18 is formed protruding from the edge of the pressing plate along the circumferential direction on the bottom surface of the upper pressing plate 19, and the upper pressing protrusion 18 thus formed is attached to the lower pressing plate 17.
  • One-to-one matching with the lower pressing protrusion 16 can be achieved.
  • the upper pressing protrusion 18 may be formed of two opposite sides, for example, formed at positions facing each other while having a phase difference of 180 °.
  • the upper pressing protrusion 18 may be formed of three balanced positions at three points while forming an angle of 120 °.
  • the upper pressing protrusion 18 protrudes along an arc-shaped trajectory, and at this time, a bottom inclined surface is formed on the lower surface of the upper pressing protrusion 18 to increase along the circumferential direction.
  • each lower inclined surface formed on the upper pressing protrusion 18 can form an upwardly inclined shape from bottom to top in the same direction with respect to the rotational direction of the grinder blade along the circumferential direction of the disk.
  • the lower inclined surface of the upper pressing protrusion 18 and the upper inclined surface of the lower pressing protruding part 16 may be formed as inclined surfaces facing each other.
  • the upper pressure plate 19 is pushed upward according to the pressure between the lower pressure protrusion 16 and the upper pressure protrusion 18, and between the upper pressure plate 19 and the holder 23 via the elastic plate 21 As the grinder blade 20, which is inserted into and fixed by compression, is closely fixed, shaking of the grinder blade 20 can be prevented.
  • the upper and lower pressing plates 19 and 17 rotate in this way, the lower inclined surface of the upper pressing protrusion 18 of the upper pressing plate 19 rises along the upper inclined surface of the lower pressing plate 17, so that the upper pressing plate 19 is elastic. It can be closely attached to the grinder blade 20 side with the plate 21 interposed therebetween. At this time, the upper pressure plate 19 rotates in the rotational direction of the grinder blade 20 by the frictional force according to the rotation of the grinder blade 20.
  • the upper pressing protrusion 16 of the upper pressing plate 19 and the lower pressing protrusion 16 of the lower pressing plate 17, which are opposed to each other, can be tightly engaged and bound to each other in three places, That is, as force is applied in the direction to be rotated, the lower inclined surface of the upper pressing protrusion 18 and the upper inclined surface of the lower pressing protrusion 16 are tightly engaged with each other, and as a result, the upper pressing plate 17 moves toward the grinder blade 20 side As more pressure is applied, the grinder blade 20 can be firmly and closely fixed.
  • the grinder blade fixing device of the hand grinder strengthens the bite of the grinder blade 20 and at the same time facilitates the loosening of the grinder blade 20, and also reduces vibration generated during rotation of the grinder blade 20.
  • An elastic plate 21 is included as a means for reducing.
  • the elastic plate 21 is in the form of a disk having a drive shaft through hole 10c in the center thereof, and is coupled to the upper surface of the upper pressure plate 19 and is installed in a structure in contact with the lower surface of the grinder blade 20.
  • protrusions 24 formed in a circular band shape are formed on the upper and lower surfaces of the elastic plate 21 along the circumference of the drive shaft through-hole 10c, and the upper protrusion 24 at this time is a grinder blade 20 On the hole side of the center of the lower protrusion 24 is accommodated by being inserted into the side of the seating groove 27 in the upper pressure plate 19, respectively.
  • the elastic plate 21 may be made of a rubber material, a plastic material, a silicon material, or the like.
  • the elastic plate 21 is compressed while being pressed by the grinder blade 20, and by the compression action of the elastic plate 21 pressed in this way, Since the holder 23 can be tightened more tightly, the fixed state of the grinder blade 20 can be firmly maintained.
  • the compressed elastic plate 21 restores the restoring force and removes the upper pressure plate 19. It is pushed downward, and eventually, the binding between the upper and lower pressing protrusions 18 and 16, which were tightly engaged, is released, and the pressing force by the upper pressing plate 19, which has been raised, is released, and the fastening state of the holder 23 is loosened, and the holder ( 23) can be easily solved.
  • the elastic plate 21 serves to accommodate the clamping force when the holder 23 is fastened and to absorb the vibration when the grinder blade rotates, and the grinder blade pressed down when the holder 23 is fastened ( 20), it is possible to exert elastic force in the vertical direction while being slightly pressed, and eventually, the elastic force exerted by the elastic plate 21 partially accommodates the fastening force when fastening the holder, and the entire grinder blade 20 is tightly bound.
  • the holder 23 can also be easily released by the loosening between the upper and lower pressing protrusions 18 and 16 as well as the elastic force (restoring force) exerted by the elastic plate 21.
  • the elastic plate 21 serves to absorb vibration, shaking, shock, etc. generated during grinder work, and eventually reduces the shaking transmitted to the operator's hands and arms, so that the operator works with the grinder in a more comfortable state. will be able to do
  • the grinder blade fixing device of the hand grinder includes a holder 23 as a means for substantially fixing the grinder blade 20 .
  • the holder 23 is in the form of a disc having a drive shaft fastening hole 22 at the center, and is screwed to the grinder drive shaft 14 using the drive shaft fastening hole 22 and is in contact with the upper surface of the grinder blade 20. while fixing the grinder blade 20.
  • At least one pair of tool holes 25 capable of turning the holder 23 by hanging a tool are formed in the holder 23 when fastening or disengaging for mounting and dismounting of the grinder blade 20. .
  • These tool holes 25 can sometimes be selectively used in situations such as when the holder 23 is tightly bitten.
  • FIG 14 to 16 are cross-sectional and perspective views showing mounting states of grinder blades using the grinder blade fixing device of the hand grinder according to another embodiment of the present invention.
  • the grinder blade fixing device 110 is fitted to the grinder drive shaft 14 of the hand grinder 100, and the grinder blade 20 is fitted thereon.
  • the drive shaft coupling hole 15 in the lower pressure plate 17 of the grinder blade fixing device 110 fits snugly into the shaft base 26 of the grinder drive shaft 14 so that it can be hung in the rotational direction.
  • the grinder blade 20 when the holder 23 is rotated while being tightened more tightly, the grinder blade 20, the elastic plate 21, the upper pressure plate 19, and the housing 13 also rotate in the same direction.
  • the upper pressure plate ( The lower inclined surface of the upper pressing protrusion 18 in 19) climbs along the upper inclined surface of the lower pressing protruding part 16 in the lower pressing plate 17, and along with this, the upper pressing plate 19 and the elastic plate 21 rise while pressing the side of the grinder blade 20.
  • the upper pressing protrusion 18 of the upper pressing plate 19 climbs the lower pressing protrusion 16 of the lower pressing plate 17 to some extent, for example, about 1/2 to 2/3 of the entire section of the inclined surface.
  • the holder 23 at this time is also not tightened anymore and becomes fully engaged, and eventually the grinder blade 20 is fixed to the grinder drive shaft 14 and the grinder blade ( 20) is completed.
  • a new grinder blade fixing device consisting of a combination of a lower pressure plate and an upper pressure plate that can be tightly engaged with each other and easily released from each other, the grinder blade replacement work can be easily performed without effort. Workability related to replacement can be improved, and all vibrations and vibrations generated during grinding can be absorbed so that workers can work comfortably and safely. concerns can be clearly ruled out.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Polishing Bodies And Polishing Tools (AREA)

Abstract

La présente invention concerne un dispositif de fixation de lame de meuleuse utilisé pour fixer facilement une lame de meuleuse telle qu'une pierre de coupe, une meule, une brosse ou similaire à un côté d'une meuleuse à main ou l'en détacher. La présente invention concerne un dispositif de fixation de lame de meuleuse pour une meuleuse à main qui réalise une nouvelle forme de dispositif de fixation de lame de meuleuse dans lequel une lame de meuleuse peut être fermement fixée en utilisant une action de mise en prise et de libération entre une plaque de pression inférieure fixée à un arbre de meuleuse et une plaque de pression supérieure qui tourne conjointement avec la lame de meuleuse, l'état fixe de la lame de meuleuse pouvant parallèlement être facilement libéré. Par conséquent, il est possible d'améliorer la maniabilité liée au travail de remplacement de la lame de meuleuse et de garantir l'absorption de toutes les vibrations ou secousses qui se produisent pendant le travail de meulage, de sorte que les travailleurs puissent opérer avec confort et sécurité.
PCT/KR2022/014239 2021-12-02 2022-09-23 Dispositif de fixation de lame de meuleuse pour meuleuse à main WO2023101169A1 (fr)

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KR1020210170505A KR102441374B1 (ko) 2021-12-02 2021-12-02 핸드 그라인더의 그라인더 날 고정장치
KR10-2021-0170505 2021-12-02

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KR102441374B1 (ko) * 2021-12-02 2022-09-07 (주)삼한기업 핸드 그라인더의 그라인더 날 고정장치

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US4637170A (en) * 1985-01-17 1987-01-20 Aleck Block Abrasive apparatus
EP0336930B1 (fr) * 1986-12-24 1991-06-05 Robert Bosch Gmbh Dispositif de serrage pour la fixation amovible d'un outil, notamment d'un disque abrasif
US6279919B1 (en) * 1999-09-09 2001-08-28 Kenneth Turos Apparatus for securing a workpiece to a rotatable machine member
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KR101570052B1 (ko) * 2014-05-03 2015-11-19 김창성 핸드 그라인더
KR101855860B1 (ko) 2017-05-02 2018-05-23 김다혜 회전장치
KR102045341B1 (ko) 2018-01-12 2019-11-15 권정자 핸드 그라인더의 그라인더 날 고정장치
KR102037521B1 (ko) * 2018-12-28 2019-10-29 채성덕 원터치로 연마패드의 탈부착이 가능한 그라인더 홀더
KR102052502B1 (ko) * 2019-02-22 2019-12-05 김기찬 디스크 교체가 용이한 그라인더
KR102136486B1 (ko) 2019-02-27 2020-07-21 안상훈 그라인더 휠 고정장치
KR102154954B1 (ko) * 2020-04-02 2020-09-10 (주) 비티케이 그라인더휠용 흔들림방지 원터치 커플러

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Publication number Priority date Publication date Assignee Title
US4637170A (en) * 1985-01-17 1987-01-20 Aleck Block Abrasive apparatus
EP0336930B1 (fr) * 1986-12-24 1991-06-05 Robert Bosch Gmbh Dispositif de serrage pour la fixation amovible d'un outil, notamment d'un disque abrasif
US6279919B1 (en) * 1999-09-09 2001-08-28 Kenneth Turos Apparatus for securing a workpiece to a rotatable machine member
KR101737890B1 (ko) * 2016-05-23 2017-05-22 우삼균 절단휠 고정구 및 이를 포함하는 연마장치
CN112428142A (zh) * 2020-11-19 2021-03-02 东台市飞花砂轮有限公司 一种高速超高速磨削用cfrp砂轮
KR102441374B1 (ko) * 2021-12-02 2022-09-07 (주)삼한기업 핸드 그라인더의 그라인더 날 고정장치

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