JPH01500578A - Disposable grinding device with integral mounting hub - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] FIELD OF THE INVENTION This invention relates generally to articles for abrasive finishing, and more particularly, the present invention relates generally to articles for abrasive finishing, and more particularly, the present invention relates to The grinding device and mounting hub are suitable for use with portable power tools. The present invention relates to an abrasive grinding device suitable for mounting on a machine. More particularly, the present invention is applied to disposable central depression type grinding wheels.

Background of the invention The use of rotationally driven grinding equipment is widespread and popular in our world. ing. One of the more serious problems that arises when using such equipment is that the grinding wheels, etc. grinding from a shaft, spindle or other rotatable drive means on which the grinding device is mounted; Provide effective means to prevent unwanted or accidental dislodgement of the device. It is in. This problem can be solved by grinding in order to facilitate quick removal and replacement of the grinding equipment. The connection between the device and its drive shaft, i.e. the main shaft, is intentionally removable. This is especially important in some cases. This type employs a large number of equipment, e.g. grinding The grindstone is intentionally removable from the 1m shaft of the power section so that it can be easily replaced. This includes electric grinding machines for groove belts. In order to properly attach the grinding wheel to the shaft, A device that provides sufficient ramp force and fixes the grinding wheel so that it rotates. must be dressed.

One means of fixing the grinding wheel to the drive shaft is through an opening and an opening provided in the abrasive grinding wheel. A suitable backing flange with a central opening to be aligned was provided. . Bolt or nut member (depending on the shape of the drive shaft, i.e. if the drive shaft has a male thread) (depending on whether the grinding wheel has a is then tightened into place. In this way, the product is ready for use. A plurality of loose parts are formed in the assembled assembly. When a grinding wheel is used , an appropriate ramp force is applied in order to quickly mount the grinding wheel on the drive shaft.

However, such assemblies typically require a For this purpose, you will need a suitable tool such as a spanner. Such a device is described in U.S. Patent No. 3.5. No. 96,415; No. 1,998,919: No. 566.833: No. 507.2 No. 23: No. 1,162,970; No. 791,159; No. 489,149 and and No. 3.210.892.

Later, the installation involves permanently attaching the hub to the grinding wheel and converting the entire unit into a drive shaft. It is quick and easy to install and remove, and when the grinding wheel becomes worn, the entire unit can be replaced. It has become desirable to be able to dispose of it. In this type of equipment , In order to fix the grinding wheel so that it rotates, the installation requires integrity between the hub and the grinding wheel. To hold the grinding wheel in place, apply epoxy resin or other adhesive between the backing 7 run and the back of the grinding wheel. It is customary to use adhesive.

Although the adhesive worked quite satisfactorily in most applications, in some cases Otherwise, the adhesive will peel off and the grinding wheel will not be able to rotate relative to the hub. found. The hub can be attached to the grinding wheel by bending its extension into place. is an integral member that is internally screwed and held in place, thereby: It provides a constant clamping force to hold the grinding wheel, so the above-mentioned This was particularly observed. Traditional nuts that are fixed from the front as explained earlier As with the case with No pumping force was applied. As a result, the grinding wheel and mounting have various The keyway and the corresponding key structure were developed, and the installation was carried out between the knob and the grinding wheel. Used in combination with adhesives to prevent driving. An example of such a device is National Patent No. 3.136,100; No. 4,015,371: No. 2.278,30 No. 1: No. 3.081,584; No. 3.500.592: No. 3.800.48 No. 3: No. 4,240.230 and No. 4.541,205.

Other prior art patents known to applicant are U.S. Pat. No. 3,041,797: No. 3.879,178: No. 1,724.742; No. 3.912,411: No. 3.879,178: No. 3.960.516; No. 4,026,074: No. 4,054,425; No. 4,088,729: No. 4,601,661; No. 791,791; No. 872,932; No. 2,567.782; No. 3.1 No. 36.100: No. 3.210.892 and No. 3.621,621.

In advance, the permanently attached mounting is a convenient disposable grinding wheel assembly including the hub. The equipment utilized to provide the assembly has largely fulfilled its intended role.

Several inherent drawbacks have been found with various devices. such drawbacks During manufacturing, the use of adhesives adds additional materials and labor to manufacturing costs. It is to be done. Some equipment requires parts to function properly. must be keyed together and properly aligned. In addition to it , - Die-cast installations that include backing flanges as parts can be made using hubs. When the grinding wheel is being rotated by a power tool, the grinding wheel may be No swords are added. Additionally, such die-cast installations allow the hub to be relatively It is large and requires a large installation space, which increases the weight of the completed product and reduces costs. Also increases.

Summary of the invention The drive member is non-removably mounted for attachment to the rotatable main shaft of the power tool. Grinding equipment installed.

The drive member has a backing flange on one side of the device and a backing flange on the device. and a retaining nut located on the opposite side. The nuts are from the front of the device to the back. The opening is passed through the page, and one end thereof has a radial seven runs that abut against the front surface of the mounting. Remove the retaining nut and base flange from the other end in one piece without using adhesive. Extending are protrusion means which impossibly fasten to the device.

The main shaft of the power tool is equipped with 7 bases to maintain pressure t on the flange during operation of the device. The base member that engages the outer surface of the tube is held loosely.

Alternatively, the projection means may be provided with pressure cap means t-*i. pressure cap is , defining a central opening through which the main shaft of the power tool passes for engagement with the nut.

More specifically, the anchoring means and the pace member or pressure cap are is attached to the main shaft of the power tool, the device is attached to the nut and backing flange. placed in a compressed state between them.

Brief description of the drawing FIG. 1 shows an electric i-fill grinding wheel assembly constructed in accordance with the principles of the present invention. Conventional sectional view: FIG. 2 is an exploded view of the structure as shown in FIG. 1; FIG. 3 is an exploded view of the structure as shown in FIG. Cross-sectional view of the backing 7 lanzo constructed according to: FIG. 4 is a cross-sectional view of a retaining nut constructed in accordance with the principles of the present invention; Figure 5a, cross-sectional view after upset of the retaining nut of Figure 5: FIG. 6 shows a spindle base constructed in accordance with the present invention for use in small grinding wheels. Alternative configurations for the base assembly: FIG. Cross-section of another embodiment of a grinding wheel assembly mounted in an operational position on the spindle of a tool Front view: FIG. 8 is a cross-sectional view showing the construction of a pressure cap constructed in accordance with the present invention: FIG. 9μ, another disposable grinding wheel assembly constructed in accordance with the principles of the present invention. A cross-sectional view of an embodiment; FIG. 10 shows a lateral view of a backing flange constructed in accordance with the present invention; Cross section: FIG. 11 is a cross-sectional view of a retaining nut constructed in accordance with the principles of the present invention; FIG. 12 is a cross-sectional view of the retaining nut of FIG. 5 after being upset; Figure 813 shows a spindle constructed in accordance with the present invention for use in small grinding wheels. An alternative configuration of pace assembly.

detailed description 1 through 5, in accordance with the principles of the present invention. A preferred embodiment of a disposable grinder assembly constructed with . Although the present invention has utility with any disposable electrically driven grinding device, Here, we will explain about the central depression type grinding wheel. The central part as shown in the drawing The sinking type grinding wheel 10 allows the grinding wheel to be mounted on the main shaft 14 of a suitable power tool 16. Disposable drive member that is permanently attached to the grinding wheel as has. According to the principles of the invention, the disposable attachment is mounted on the hub, i.e. the disposable drive The member is compressed when the grinding wheel 10 is placed on the spindle 14 during operation. The greater the force applied to the grinding wheel during use, the greater the operating pressure. It is configured to also increase shrinkage. Place the grinding wheel in a compressed state as shown in By this, the grinding wheel is maintained on the spindle and does not fly out, and at the same time The driving wheel 10 is moved by the driving member, the j-nawa Therefore, it becomes impossible to rotate relative to the hub 12. However, the structure of the drive member In order to achieve It can be removed and disposed of.

As clearly shown, grinding wheel 10 includes a back surface 18 and a front surface 20. grinding The central part of the whetstone has a sunken shape when viewed from the front, as shown at 22. There is a raised portion 24 corresponding to the center on the rear and rear sides. The opening 26 located in the center is , is provided in the sunken central portion of the grinding wheel 10. Set the center part of the whetstone 10. The reason for lowering the drive unit is that the main shaft protrudes from the surface portion 20 of the grinding wheel 10. Therefore, while the grinding wheel 10 is in use, it will not interfere with the work. This is to ensure that

A backing flange 28 is provided on the back side of the grinding wheel 10 centered on the raised portion 24. 18 and is accepted. The flange 28 has a diameter smaller than that of the grinding wheel 10. do. The backing flange 28 has a through hole aligned with the opening 26 of the grinding wheel 10. A second central opening 30 is defined therethrough. The backing flange 28 has a hole concentric with the opening 30. A pair of reinforcing ribs 32 and 34 are formed on.

The backing flange 28 is preferably stamped from sheet metal, but of course However, if desired, other materials such as molded rigid plastic or die-cast metal can be used. It would also be possible to construct it from fees.

As shown in more detail in FIG. 3, the backing flange 28 has an inner surface 36 and an outer surface 36. 38. The inner surface 36 is arranged opposite to the back surface 18 of the polishing finishing grinding wheel 10. It will be done. Interior surface 36 includes a pair of lands 40 and 42. Land 40 is always a hit is formed along the outer periphery of the flange 28. The land 42 faces the opening 30 and It is located at a position that is shifted inward away from the tube/door 40. Land 40 is polished. The land 42 engages with the back surface 18 of the raised grinding wheel 10 that is spaced apart from the sunken center part. Depending on the variations in the dimensions of the grinding wheel and the manufacturing tolerances of the grinding wheel and flange, It is thought that it engages with the back surface facing the sunken center portion 22 of the polishing finish grinding wheel 10. Ru.

In particular, as seen in FIG. 32 and 34 are consecutive. The continuous lip 32 is between the lands 40 and 42, It is arranged over the transition area between the sunken central part of the grinding wheel 10 and other parts, and is connected. A subsequent lip 34 is disposed intermediate the opening 30 and the land 42.

The retaining nut 44 is hollow and has a radially outwardly extending flange at the first end 50. It includes a body portion 46 having a flange 48 . the opposite or second end of the body At the time of assembly, the main body 46 is in a position slightly shifted from the grinding wheel 10 and the grinding wheel 52. a continuous groove 54 etc. formed after being inserted through the opening in the backing flange 28; A recess is provided. On the inner surface of the screw 46, there is a threaded three-shaft 14 of a power tool. Threads 56 are formed along the inner surface for attachment to. Nut 44 is Ken The front surface of the grinding wheel 1o is inserted through the opening 26 of the grinding wheel and the opening 30 of the flange 28. 2o toward the back surface 18. The end 52 of the nut 44 has a flange 28 It extends through the opening 3o by a length that does not exceed the top of the lip 34.

After the nut 44 is inserted through the Ken AIJ grindstone 1o and the opening of the flange 28, Its ends 52 form a continuous #454, as shown in detail in FIG. In order to do so, staking is set by Sakurai etc.

When the set is made, the protrusion 56 is the through opening 3 in the outer surface 38 of the flange 28. The flange 28 extends outwardly from the flange 46 so as to mate with the portion adjacent to the flange 28. This is the only means used to secure the nut 44 to the grinding wheel 1o.

Although the protrusion 56 is shown to be continuous like the groove 54, it can be modified as desired. It should be understood that it is okay even if it is intermittent.

The flange 28 and the nut 44 are attached to the flange 4 of the grinding wheel 10 without using adhesive. It will be clear to those skilled in the art that the projection 56 and the projection 56 are mechanically fixed together. It should be.

Nut 44 is preferably constructed from an aluminum extrusion; is then machined to provide K, flange 38 and threads 46.

Alternatively, the nut may be formed from aluminum or steel bar, or die-cast metal. It's okay to be

In order to properly operate a slow aqua grinding wheel as described as an example. a first surface 64 such that at least a portion thereof engages the outer surface 38 of the flange 28; A base assembly 6o is provided which includes a disc 62 having a base assembly 6o. The disk 62 is As shown in FIG. 1, the preferred embodiment 2 includes a threaded main shaft 14. The main shaft 14 is held by the holding member 66, which may be a nylon ring that can be freely screwed together. held in place. In that case, the nylon ring 66 is Always keep the five discs 62 loose on the three shafts 14 regardless of whether they are maintained in place or not. hold on to. The first surface 64 of the disk 62 has a flange, as can be seen from the drawings. defining continuous ridges 68 and 70 that engage lips 34 and 32 of 28, respectively; do. As shown, the ridges extend downwardly and the disc is secured to the nut 44 during use. defines a chamber or pocket into which a portion of the Lips and bulges The contact is essentially a line contact. For this line contact, the grinding wheel 10 is usually It can be removed from the power tool 16 relatively easily. However, during the grinding operation It is thought that a huge amount of force is exerted by the disk 62, so the used Removal of the grinding wheel can sometimes be difficult.

A self-lubricating group is provided between the opposite surface 65 of the disc 62 and the stepped portion 69 of the power tool 16. A plastic washer 67, preferably made of plastic, is disposed.

Washer 67 serves two functions. The first function is to accommodate electric motors of various sizes and shapes. This corresponds to the tool 16. In other words, there is a change in the length of the main shaft 14, and the ball shaft A spacer is provided to ensure that the end does not protrude too much from the end of the nut 44. is required. The second function is to remove the power tool 16 from the power tool 16 after the grinding wheel lO has been used. This is to assist in the removal of the grinding wheel 10. Very large forces are applied during the grinding operation. Because of the generation of Therefore, in order to remove the used grinding wheel, you must use a large sword with a sharp blade. Must be. Self-lubricating surfaces made of different materials between the washer 67 and the stepped portion 69 and surface 65 The bond can be released almost immediately by applying a very small amount of pressure to the grinding wheel 10. Ru. The aforementioned line contact then easily separates the grinding wheel from the base assembly 60. can be set.

The force required to place the grinding wheel 10 in a compressed state is It is generated when the screw thread 56 is attached to the screw thread 56 of the With reference to FIG. 1, the grinding wheel 10 When the ridges 68 and 70 are screwed onto the main shaft 14, the ridges 68 and 70 are attached to the lips 34 and 3 of the flange. Note that it concatenates in alignment with o. If this is the case, the flange should be Pressed in the direction. At the same time, the mutual relationship between the thread 14 of the main shaft and the thread 56 of the nut If so, push the nut upward toward the flange 28 and place the grinding wheel in a compressed state. let Looking at the drawings, especially Figure 1, when the grinding wheel is in operation, the power Transmitted downward from the tool 16 to the washer 67, the disc 62, and the land 4o of the flange 28. It is clear that At the same time, the sword points upward at the flange 48 of the nut 44. It has been added via.

These forces rotate through the threaded engagement between the main shaft 14 and the inner surface 56 of the nut 44. Torque is applied to the grinding wheel when it is placed into engagement with the workpiece. It is generated by Those skilled in the art will understand that the grinding wheel 10 is in contact with the workpiece. Because the grinding wheel is placed on the ground, additional torque is applied to It will be appreciated that the stone is further tightened to the spindle 14. In other words, grinding wheel As the stone moves during contact with the workpiece, the friction between the nut and the center of the grinding wheel is ), the nut will be further rotated in the tightening direction. Natsuto's times like this The rotation pushes the nut further towards the t-flange, where the nut is pushed even further. Apply force to the flange. The stronger the grinding wheel is tightened, the greater the operating compression force. In addition, the grinding wheel 10 is connected to the backing flange 28 and the flange 4 of the nut 44. 8, it will be flanged more accurately.

As a result of this forceful rung action, i.e. compression, the grinding wheel 10 has a hub, i.e. Movement relative to the drive member 12 is prevented, and at the same time, disengagement from the main shaft 14 is prevented. will be stopped. Further, the inner surface 64 of the disk 62 has a space above the upper end 52 of the nut 44. That is, care should be taken in forming the chamber 71. This chamber is upwardly so that the tool is not restricted by the power tool or base assembly during operation. Provide room for movement.

FIG. 6 shows a structure similar to that shown in FIG. 1, but with a smaller grinding wheel, e.g. Specially designed for use with grinding wheels with a diameter of 5 inches or less An alternative structure is shown. The only difference is that the diameter of the disc in the base assembly is smaller. The push disk engages only the first lip adjacent to the through opening of the backing flange. This is what is being done. As shown, the disc 8o has a backing flap. defines a peripheral surface 82 that engages the upper surface of the continuous lip 34 of the hinge 28 . small sharpener The grinding wheel does not require a large backing flange for impeccable operation I know that a small grinding wheel with a large backing is fine. You should understand that it works well.

Alternatively, as shown in FIGS. 7 and 8, the indexable The hub assembly 12 is engaged with the hub assembly 12 in order to generate appropriate operating compressive force of the grinding wheel. The pressure cap 9o is fitted so that it does. Under these circumstances, the aforementioned Such a pace assembly lj60 becomes unnecessary. Pressure cap 9o is a grinding wheel is in the operable position of the power tool 16, 1i! Engaged with the surface 69 of the main shaft of the power tool including a mating first back surface 92 .

The second or front surface 96 of the pressure cap 9o is located at the upper end of the continuous lip 34. come into contact with. The pressure cap 90 is located on the front face 96 of the pressure cap 9o. gripping lips 98 extending radially inwardly from the depending skirt portion 84; The hub assembly 12 is held in place. The gripping lip 98 is on the protrusion 56. and engages the protruding edge 57 of the end 52 of the retaining nut 44. at the same time , the surface 74 of the continuous reinforcing lip 34 of the backing flange 28 projects the gripping lip 98. In the space between the edge 57 and the perimeter of the backing flange surrounding the opening 3o Swell the blade facing radially inward to solidify in place. pressure character f90 is composed of molded plastics such as polypropylene, polyamide, and acetate. It is preferable to Grasping glyph 7'98, as indicated by dotted line 99, It may be continuous or intermittent depending on the situation. The important subtlety is pressure If desired, the power cap can be disassembled before use or at the time of assembly in the factory. It easily snaps into the locking position as shown in Figure 1 in the tributator or in the user's hand. The point is that it can be included. Such capabilities are available for pre-assembled units without pressure caps. When packing the grinding wheel into a container, place the pressure cap between the grinding wheel and the container. Since it only needs to be placed in the gap between the two, it saves space during shipping. Therefore, A large number of grinding wheels can be packed on top of each other in the same container.

In addition, once the Pressure Chara f90 is installed, it will remove the part attached to the grinding wheel. As you can see, it will be discarded along with the used grinding wheel.

The blade necessary for placing the grinding wheel 10 in a compressed state has a main shaft 14 with a nut 44. It is generated when the screw thread 56 is attached to the screw thread 56 of the Referring to Figure 7, the grinding wheel It will be noted that when threaded onto the main shaft 14, surface 92 engages surface 69. . Therefore, the sword is brought into contact with the first surface 96 and the reinforcing lip 34 via the pressure cap 90. is transmitted to the backing flange 28 and presses the backing flange in a downward direction. Ru. At the same time, the mutual engagement of the threads 14 of the spindle and the threads 56 of the nut causes the nut to 7 It is pushed up toward the runzo 28 to place the grinding wheel in a compressed state. Those skilled in the art should In order to use the grinding wheel 10 by placing it in contact with the workpiece, , an additional torque is applied, as well as with the base assembly 60. It will be appreciated that the grinding wheel is further tightened to the spindle 14.

Referring now to FIGS. 9 through 13 in more detail, construction according to the principle of non-invention Another embodiment of a disposable grinding wheel-drive member assembly is shown.

As shown here, the central sinking type grinding wheel 10 has a grinding wheel with an imaginary line of 1. 6, for attachment to the spindle 14 of a suitable power tool. Assembly 12 is permanently attached.

As clearly shown, grinding wheel 10 includes a back surface 18 and a front surface 20. clearly As shown, the central part of the grinding wheel is sunk as shown at 22 when viewed from the front. There is a corresponding central ridge on the back. The sunken inside of the grinding wheel 10 A centrally located opening 26 is provided in the center.

A long rest 7 runno 128 is provided, and on the back side 18 of the grinding wheel 10, the raised portion 24 is It is accepted by fitting into the periphery. The flange 128 is smaller than the diameter of the grinding wheel 10. It has a large diameter. The backing plate or flange 128 is located at the opening 2 of the grinding wheel 10. 6 defines a second central central opening 130 therethrough. backing hula A reinforcing lip 132 is formed on the hinge 128 concentrically with the opening 130. backing plate, That is, the flange 128 is preferably stamped from sheet metal, but of course However, if desired, it can be constructed from other materials such as molded hard glass. It might be possible.

The retaining nut 134 is hollow and has a flange 138 extending radially outward. It includes an intangible portion 136 having a cylindrical shape. The position is slightly shifted from the end 142 on the opposite side of the Thread cutting of an edit power tool in which a concave portion such as a continuous groove 144 is provided at the Threads 146 are provided along the inner surface of the body 136 for attachment to the shaft 14 that has been It is formed. The nut 134 has an opening 26 in the grinding wheel and an opening in the flange 128. 130 and is inserted from the front surface 20 of the grinding wheel 10 toward the back surface 18. .

A hollow cup-shaped member 150 is attached to the top of the retaining nut that extends beyond the flange 28. By pushing a part of the 7 into the groove 144, it is made irremovable. Fixed to the nut. As shown in the figure, the hollow cup (main shaft cup 7") has an end a side wall 152 having a radially outwardly extending flange 154 disposed at 156; has. An end 158 on the opposite side of the side wall 152 is folded back inward to form a third penetrator. An opening 160 is defined therethrough. The part folded inward of the side wall 152 is the power tool 1 It also functions as a positioning area for the spindle 14 of 6, so the user can It is relatively easy to place the tool on the power tool 16. Cap 150 side The wall 152 is designed to form a depression as shown at 164 and 166 in FIG. For simple staking work, it can be attached to Nut's #1144. < The number of depressions 164 and 166 may be one or more, and may be independent. It is noted that suitable continuous upsetting of sidewall 152 may be performed if desired. It will be obvious to those skilled in the art. Furthermore, the continuous groove 144 may be formed discontinuously. In other words, it is recognized that multiple recesses may be formed as desired. Rorou. In any case, the cap 7'150 is attached to the nut 134 so that it cannot be removed. However, in order to place the grinding wheel 10 in a compressed state, the cup and nut are mutually connected. It is attached so that it can be pressed relatively towards the front.

Grinding wheel 10t - The blade required to be placed in a compressed state has a main shaft 14 of NAND 1. It is generated when the thread 146 of 34 is attached. Referring to Figure 1, grinding When the grinding wheel is screwed onto the spindle 14, the surface 69 (a suitable washer, spacer or part of the spindle) ) is above the dome-shaped or curved portion 162 of the side wall 152. It will be noted that it engages surface 170 in alignment. Therefore, such a guarantee This forces the cup in a downward direction. At the same time, screw thread 14 of the main shaft The mutual engagement of the nut with the threads 146 forces the nut toward the cup. cup Face 172 of flange 154 at 150 engages face 174 of backing flange 1280. so that the force is applied through the backing flange and the back surface 18 of the grinding wheel 10. and as previously described with respect to pace assembly 60 and pressure cap f90. , the grinding wheel is placed in a compressed state.

As shown in FIG. 12, the flange 128 and cup 150 can be arranged as desired. , may be formed as an integral unit. If you want a unit like this , a desired recessed area 180 for receiving the raised portion 24 of the central submerged grinding wheel. Composite nut-flanges are stamped from a single piece of sheet metal to provide Also good. From the center of the cup 182, the side walls 184 of the cup form a dome as previously described. Extending with an inwardly folded end 186 to form a structure 188 Will. A reinforcing ring 190 may be included if desired.

A grinding wheel assembly such as that shown in the drawings and described above is bonded to form a It is simple and easy to assemble without the need for chemicals, and is an advanced method that uses a cast metal hub. It is relatively lightweight compared to conventional equipment, and the grinding wheel can be securely attached to the power tool. In addition, by using a larger compression, the grinding wheel related to the drive member can be Those skilled in the art will appreciate that preventing relative rotation of the . Also, explained first The use of the device as constructed in the preferred embodiment is It has also been found to be extremely smooth with no vibrations. as sharp as seven The reason why it works so smoothly is that when it is in compression, all the parts are In addition to being aligned with the tip metal, the contact surfaces are parallel and only the grinding wheel 10 is , and only if the grinding wheel is not properly balanced during its construction. Because it can happen.

Standard diameters of all sizes now available as illustrated and explained Center-sinking type grinding wheel, i.e. 4 inch, 4.5 inch, 5 inch, fin A 9-inch and 9-inch grinding wheel can be used. At present, the die-casting is done in one piece. By using the lunge structure, only the grinding wheel, finch, and 9-inch grinding wheel are slow-away. Ihab is used, but 4 inch, 4.5 inch and 5 inch cars are prior art Conventional two-piece installations, as is customary in do.

In this way, the grinding wheel is held securely during operation.

It is lightweight, vibration-free, and cheaper than prior art indexable grinding wheels. , a disposable grinding wheel-drive that complies with all currently known existing safety standards. A material assembly is disclosed.

FI6.8 international search report

Claims (37)

[Claims] 1. In a disposable grinding device having a front face and a back face with a first central opening, a disposable drive member for securing said device to a threaded rotatable shaft of a power tool; And the driving member is: a second centrally disposed penetrating device having a diameter smaller than the diameter of the grinding device; a backing flange defining an opening, the backing flange being configured to support the grinding wheel; The first and second openings are brought into contact with the back surface of the device in an aligned manner. a hollow internally threaded body having a first end and a second end; a flange extending outwardly in a first radial direction from the first end of the body; extending, the main body is in contact with the first opening, with the flange abutting the front surface. a retaining nut passing through the opening from the front side toward the back side; the second end of the body, connecting the retaining nut and the backing flange; Irremovably adheres to the device without the use of adhesives, and the grinding to compress between the backing flange on the grinding wheel and the flange of the nut. , as a grinding load is applied to the grinding wheel during use, the retaining nut and front means for permitting relative axial movement toward each other with the backing flange; A disposable drive member comprising: 2. The securing means extends outwardly from at least a portion of the second end of the body. 2. A disposable drive member for a grinding device as claimed in claim 1, including means for ejecting. 3. The portion of the body includes a continuous ring that abuts the backing flange. A disposable drive member for a grinding device according to claim 2. 4. The second end of the body is upset to provide the continuous ring. A disposable drive member for a grinding device according to claim 3. 5. The backing flange includes an inner surface and an outer surface, the inner surface being connected to the back of the device. and includes an outer peripheral land, the land being disposed opposite to the rear surface of the device. 5. A disposable drive member for a grinding device according to claim 4, which is in contact with the drive member. 6. The outer surface of the backing flange includes lip means extending therefrom. A disposable drive member for a grinding device according to scope 5. 7. 7. The rib means of claim 6, wherein said rib means includes first and second successive lips. Disposable drive member for grinding equipment. 8. The backing flange is formed from a thin sheet metal, and the lands and lips are formed from the thin sheet metal. Claim 7 formed by stamping a gold backing flange Disposable drive member for grinding equipment. 9. Claims 1 to 8, wherein the grinding device is a central sinking type grinding wheel. The disposable drive member for a grinding device according to any one of the items. 10. disposed between the backing flange and the power tool and causing the compression; said shaft directs said nut towards said tool by threaded engagement therewith. Claim further comprising means for applying a force to said backing flange as it is pulled. Disposable drive member for a grinding device according to claim 1. 11. 11. The method according to claim 10, wherein said means for applying a force is carried by said shaft. Disposable drive member for grinding equipment. 12. The force applying means is loosely held on the shaft, and the drive member is Claim further comprising a ring screwed onto the shaft to hold the force applying means on the shaft. A disposable drive member for a grinding device according to item 11. 13. the means for applying a force is axially aligned with the first and second apertures; a third centrally located aperture in contact with the backing flange; Claim 11, which is a base plate defining a deviated raised portion means. Disposable drive means for grinding equipment. 14. The pace plate is connected to the backing flange and nut combination and the pace plate. the second end of the nut is retracted between the base plate and the base plate during the grinding operation. 14. Disposable drive means for a grinding device as claimed in claim 13, defining a chamber for a grinding device. 15. Claim 10, wherein said means for applying force is carried by said grinding device. Disposable drive means for the described grinding device. 16. The means for applying said force is at least partially adapted to be placed in place by said nut. The disposable drive for a grinding device according to claim 15, which is a cap member that is held. means of movement. 17. The cap member is constructed of molded plastic and is removable to the device. 17. Disposable drive means for a grinding device according to claim 16, which is freely fixed. 18. The cap member comprises a metal holder and is non-removably attached to the device. 17. Disposable drive means for a grinding device as claimed in claim 16, wherein the drive means is fixed to a grinding device. 19. in front of the backing flange when the device is screwed onto the rotatable shaft. further comprising pace means for attachment to the threaded shaft engaging the external surface. A disposable drive means for a grinding device according to claim 5. 20. the outer surface of the backing flange includes rib means extending therefrom; The base means includes a disc having a first surface that engages the rib means and the device is and means for loosely holding the disc on the shaft when the disc is not in use. Disposable drive member for a grinding device according to item 19. 21. A first surface of said disc includes a continuous strip that engages said rib means in substantially line contact. 21. A disposable drive member for a grinding device according to claim 20, which defines a ridge means for . 22. The means for loosely holding the disc is formed of plastic. 22. A grinding device according to claim 21, wherein the grinding device is an annular member which can be screwed onto the shaft. Disposable drive member. 23. The rib means includes first and second successive ribs, and the disc includes a first and a second successive rib. first and second ridges for engaging the first and second ribs in substantially line contact; A disposable drive member for a grinding device according to claim 2. 24. The base means is a washer means disposed on the power tool adjacent to the shaft. 20. The disposable drive member for a grinding device according to claim 19, further comprising: 25. Claim 2, wherein the washer is made of a material different from that of the power tool. Disposable drive member for a grinding device according to item 4. 26. The use for a grinding device according to claim 25, wherein the washer is made of plastic. Discarded drive member. 27. 27. The grinding device of claim 26, wherein the washer is self-lubricating. disposable drive member. 28. The outwardly projecting means defines a projecting edge and the drive member is centrally disposed. said protruding edge to define a through-opening and secure said cap to said device; Claim 2 further comprising pressure cap means having means for gripping the portion. Disposable drive member for grinding equipment. 29. The outwardly projecting portion of the main body abuts the backing flange and 29. The grinding device of claim 28, including a continuous ring defining the projecting edge. Disposable drive member for use. 30. Claim 28, wherein said grasping means includes a radially inwardly directed member. Disposable drive member for the described grinding device. 31. The pressure cap has a depending skirt portion terminating in the gripping means. The disposable grinding device according to claim 30, further comprising a cap body having Drive member. 32. The cap body has a first surface that engages with the shaft of the power tool, and a first surface that engages with the shaft of the power tool; a second surface that engages the backing flange when the cap is secured to the device; 32. A disposable drive member for a grinding device according to claim 31. 33. The backing flange has an inner surface and an outer surface, and the outer surface of the backing flange has an inner surface and an outer surface. the surface includes a continuous reinforcing rib extending therefrom, and the second surface includes a continuous reinforcing rib extending therefrom; 33. A disposable drive member for a grinding device according to claim 32, which engages with the drive member. 34. the reinforcing rib is adjacent to the outwardly projecting portion of the retaining nut; the gripping means of the pressure cap are arranged to surround the rib; Claims disposed between and engaged with the outwardly projecting protruding edges. A disposable drive member for a grinding device according to item 33. 35. The ribs are used when the pressure cap is secured in place on the vehicle. and pressing the gripping means toward the protruding edge. Disposable drive member for grinding equipment. 36. 3. The gripping means is an inwardly directed ridge at the distal end of the skirt portion. A disposable drive member for a grinding device according to scope 35. 37. 37. The distal end of the skirt portion defines a plurality of notches. Disposable drive member for grinding equipment.