• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A rotary cutting assembly for a ground drilling machine includes a ball bearing shaft pin adapted to be coupled to a cutting body, wherein a shaft pin body is rotatably coupled to the cutting body to allow the cutting body to rotate freely with respect to the bearing shaft pin. A minimum diameter defines a shaft part, with sealing surfaces. Primary and secondary mounting ends are designed to enable a rotatable locked positioning of the bearing shaft pin in a yoke on a support bracket of a corresponding cutting head plate. A series of ball bearing grooves are recessed to extend circumferentially around the outer surface of the pivot body. A ball charge passage is designed to extend as a free borehole axially externally through the shaft journal body of the bearing shaft journal.
    公开号:SE1150329A1
    申请号:SE1150329
    申请日:2008-09-16
    公开日:2011-04-15
    发明作者:Stuart Blattner
    申请人:Stu Blattner Inc；
    IPC主号:
    专利说明:

    Ball ball hole 13 and then a ball plug holder 14 is inserted into the shaft pin 2 to hold the ball plug 12 in place.
    To reduce the concern of damage caused to the bearing balls by the ball bearing 10 and the edges of the ball loading hole 13, the cutting structure, according to the prior art, has placed the ball hole 13 at or near 180 degrees from the bearing loading zone of the shaft pin assembly 2. Although this configuration provides little or no load on the ball charge hole, the construction prevents rotation of the shaft journal, which prolongs the life of the shaft journal bearing.
    Another example is also shown and described as the contents of U.S. Pat.
    Pub. No. 2002/0166702 (filed May 7, 2002) by Cariveau et. al. There, Cariveau et al. up a rotatable shaft journal for a ground drilling cutting device which includes a bearing shaft journal adapted to be coupled to a cutting body. The first mounting end of the bearing shaft pin is designed to enable a rotatably locked position in a corresponding yoke. The yoke is operatively connected to the insert body. An individual ball path is formed in an exterior surface of the shaft journal.
    The charging passage is formed in the shaft journal. The ball charge passage has an exit hole on the track. The hole is positioned so that it is arranged in a rotating direction, which is at a selected angular displacement from the maximum shaft pin load of the shaft pin. The first mounting end and the corresponding yoke are adapted to enable a number of rotating directions. Each of the directions of rotation is such that the hole is directed in a direction other than the direction of the maximum shaft journal load. According to the description therein, Cariveau et. al. increase the life of the bearing as a result of material fl being iced and asagged from the bearing surface of the shaft journal by allowing rotation of the shaft journal so that a previously unloaded surface can subsequently be used to carry load while maintaining the ball charge in an angular direction outside the load bearing zone.
    While the foregoing examples provide some utility, there is a major disadvantage in the fact that, although they provide some relief from damage to the bearing balls, shaft journal surface, and ball bearing holes by placing the ball bearing hole in a position outside the load bearing zone and for rotating the shaft journal, so they are complex in their design and thus costly in manufacture and operation. Thus, it is desirable to provide a ball bearing mounted earth drilling assembly and unit which is rotatable, simple in its design and less expensive to manufacture and operate. It is also desirable to provide a ground drilling device which obviates the previously described concerns of the prior art, which relate to the alignment of the exit hole for the ball charge relative to the load bearing zone, but which also satisfies the need to extend the life of ball bearings and shaft journals. The present invention meets these needs.
    DESCRIPTION OF THE INVENTION It is therefore an object of the present invention to provide a symmetrical ball bearing-mounted earth-boring assembly which is rotationally capable, simple in its design and less expensive in manufacture and operation.
    It is also another object of the present invention to provide a ground drilling device which obviates the previously described concerns of the art, which relates to the alignment of the exit hole for the ball charge relative to the load bearing zone, but which also meets the need to extend the life of ball bearings. and shoulder pin.
    A further object of the present invention is to provide a ball bearing forged earth drilling assembly which is rotatable and can be turned to extend the life of the bearing shaft pin, eliminating the problems of the ball hole exit hole associated with prior art structures.
    To overcome the problems of the prior art methods and in accordance with the object of the invention, as set forth and described in wide scope herein, a rotary notch assembly for a ground drilling cutting device is briefly provided which includes a symmetrical ball bearing shaft journal adapted to be coupled to a cutting body. , within a minimum and maximum cylindrical diameter, and a primary and secondary mounting end.
    The maximum diameter defines a shaft journal body which includes an exterior surface adapted to be rotatably coupled to the inner surface of the cutting body so that the cutting body is allowed to rotate freely relative to the bearing shaft journal. The minimum diameter is a shaft part, with sealing surfaces. The primary and secondary mounting ends are shaped to allow a rotatable locked positioning of the bearing shaft pin in a yoke on a support bracket of a corresponding cutting head plate. A series of ball bearing grooves are recessed to extend circumferentially around the outer surface of the shaft journal body. A ball charge passage is designed to extend as a free borehole axially through the shaft journal body of the bearing shaft journal.
    Additional advantages of the present invention are set forth in part in the description which follows, and in part will be obvious from this description, or may be learned by practice of the invention. The advantages of the invention can be realized and obtained by the device as particularly pointed out in the appended claims.
    BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate at least one embodiment of the invention, and which, together with the description, explain the principles of the invention.
    FIG. 1 shows an example of a prior art of an industrial cutting unit.
    FIG. 2 is a workshop drawing showing a front view of the bilaterally symmetrical core mounted bearing shaft journal in accordance with the present invention.
    FIG. 3 is a workshop drawing showing a cross-sectional view in accordance with the core assembly of the present invention.
    FIG. 4 is a workshop drawing showing a partial view in accordance with the cutting unit of the present invention.
    FIG. 5 is a workshop drawing showing a partial view in accordance with the cutting unit of the present invention. BEST MODE FOR CARRYING OUT THE INVENTION Unless otherwise indicated, all technical or scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the art to which this invention belongs. Although all methods and materials similar or equivalent to those described herein may be used in the practice or testing of the present invention, the methods and materials preferred herein are described. Here follows a detailed reference to the presently preferred embodiments. of the invention, which examples are illustrated in the accompanying drawings in which the same reference numerals represent similar features of the invention.
    The invention provides a ground-drilling cutting assembly and a cutting unit. Referring to the drawing of Figs. 2-4, there is shown a substantially cylindrical rotary cutting assembly for a ground drilling cutting device which includes a ball bearing shaft journal 100 adapted to be coupled to the cutting body 210, having a minimum 110 and a maximum 120 cylindrical diameters, and a primary 115 and a secondary 116 mounting end. The maximum diameter 120 defines a shaft pin body 122 which includes an exterior surface adapted to rotatably engage the inner surface of the cutting body 210 so as to allow the cutting body 210 to rotate freely relative to the bearing shaft pin 110. The primary 115 and secondary 116 mounting ends are formed to enable a rotatably locked positioning of the bearing shaft pin 110 in a yoke (not shown) on a support bracket of a corresponding cutting head plate (not shown). A series of ball bearing grooves 126 are recessed to extend circumferentially around the outer surface of the shaft pin body 122. A ball charge passage 118 is configured to extend as a free bore axially through the shaft pin body 122 on the bearing shaft pin 110.
    In the best application of the invention, according to Figs. 2-3, pin holes 117, 953 cm x 1.588 cm deep, have been drilled to receive pins 238 for use in locating the seal assembly when coupled to a cutting body 210.
    The through hole 118, 2.963 cm in diameter, through the ball charge passage is designed to extend as a free borehole axially through the shaft pin body 122 of the bearing shaft pin 100 to receive the ball plug 226. According to the figures of the drawing, the invention thus eliminates the need of an exit hole for ball passage, 180 degree alignment of the ball plug and ball plug holder, according to prior art, and corresponding problems with shaft pin wear associated therewith. It also provides a symmetrical design that is easier to manufacture and use. Mounting means are preferably substantially triangular, but may have other shapes known in the art such as octagons, regular hexagons, a cross or a cylinder. A free mounting bore 119 is provided in the mounting end portions 115, 116 of the bearing shaft pin 100 for connection with pins to the yoke (not shown) of a support bracket in a raised cutting head plate of a drill.
    The bearing shaft pin body 122 suitably extends 18.08 cm axially and includes a row of five ball bearing webs side-by-side 126 designed to receive twenty-two bearing balls per groove, each with a diameter of 2.54 cm. In this way, the present invention eliminates the need for extremely tight tolerance associated with the roller bearing structure of the prior art, while maintaining satisfactory radial and axial loads during operation.
    Referring to Figs. 3 and 5, in the best preferred embodiment, the other members of the bearing shaft pin further include grooves or recesses and surfaces for clamping a seal assembly when the cutting mounting member is coupled to the cutting body, such as recesses for O-rings 121, 122 and recess 123 for outer gasket holder.
    Referring to Figs. 4-6, a ground drilling cutting unit 200 used in conjunction with a raised drill head plate for drilling the diameter of the borehole is also provided. The rotary cutting body 210 suitably includes a substantially conical outer surface 220, a free bore extending axially along a central longitudinal axis defining an inner surface for engagement with the ball bearing shaft journal as described above.
    A plurality of circumferentially distributed stone crushing members 222 are located around the outer surface 220 of the cutting body 210. The stone crushing members 222 are of a type well known in the art, such as tungsten carbide buds.
    The ball bearing shaft pin 110, described above, has been adapted to be rotatably coupled to the cutting body 210. A series of diametrically opposed annular ball bearing grooves 126 are each recessed to extend around the circumference of the outer surface of the shaft pin body and the inner surface of the cutting body. A number of bearing balls 224, are distributed in roller contact with the annular ball bearing grooves 126. Suitably, each ball bearing groove includes twenty-two 2.54 cm bearing balls. Thus, the preferred embodiment includes one hundred and twenty-two bearing balls. A substantially cylindrical ball plug 226 is provided for receiving received in the ball bearing passage 118.
    The other components of the earth-drilling cutting unit shown in the drawings include a gasket assembly with snap holder rings 230, capsule nuts 232, metal front gaskets 233, toric rings 234, O-rings 236 and pins 238.
    In addition to the advantages of this construction over the prior art, the present invention provides simplicity in the practice of the invention in terms of assembly and maintenance. Component parts are first thoroughly cleaned with a suitable solvent. The cutting body 210 is then placed with the large diameter downwards on two 10.16 cm x 10.16 cm wood panel members. One end of the ball bearing shaft pin 110 is then inserted into the cutting body 210 and fitted there so that the ball bearing grooves 126 are diametrically opposed to each other. The ball plug 226 is then inserted into the ball passage 118 and supported upwardly in a position so that the ball groove in the center 126 can be filled with twenty-two bearing balls 224. The ball plug 226 fl is then moved upward in a row of ball grooves 126 and that groove is filled as above. This procedure is repeated for the upper row of ball grooves 126. The partially assembled cutting unit 200 is then completely inverted and the above procedure is repeated in succession for the last two rows of ball grooves 126. The pins 238 are then placed in the bearing shaft pin 110, two viton O-rings 236 are placed on a shaft portion of the bearing shaft pin 110, and is lubricated with a suitable lubricant such as e.g. a film of oil. At each end, the pin holes 117 are placed against the capsule nut 231, preferably with a marker, and the metal front gaskets 232 and the viton O-rings 236 are placed against the respective metal front gaskets 232.
    The capsule nuts 231 are fixed in place with the snap fi spring rings 230. To disassemble the cutting unit for service, perform the above procedure in reverse order. Although the present invention has been described in connection with the embodiments described and illustrated above, anyone with ordinary insight into the art will understand and appreciate that modifications may be made to the insert assembly and cutting unit without departing from the true spirit of the invention and the scope of the invention. described and claimed herein.
    权利要求:
    Claims (7)
    [1]
    A rotary cutting assembly for a ground drilling device, comprising: (a) a ball bearing shaft journal adapted to be coupled to a cutting body, having a minimum and a maximum cylindrical diameter, and a primary and a secondary mounting end, the maximum diameter defining a shaft pin body which includes an exterior surface adapted to be rotatably coupled to the inner surface of a cutting body so that the cutting body is allowed to rotate freely relative to the bearing shaft pin, and where the minimum diameter defines a shaft portion, with gasket surfaces, and the primary and secondary mounting ends are formed enabling rotatably locked positioning of the bearing shaft pin in a yoke of a support bracket of a corresponding cutting head plate; (b) a series of ball bearing grooves recessed to extend circumferentially around the outer surface of the shaft journal; and (c) a ball charge passage configured to extend as a free borehole axially through the shaft journal body of the bearing shaft journal.
    [2]
    The rotary cutting socket for the earth-drilling cutting device according to claim 1, wherein the row of ball bearing grooves consists of five grooves side-by-side.
    [3]
    The rotary cutting assembly of the ground drilling device of claim 1, wherein the shape of the primary and secondary mounting ends of the bearing shaft pin includes a surface adapted to rest on top of a yoke with a substantially triangular upper surface.
    [4]
    An earth-drilling cutting unit used in conjunction with a raised cutting head plate for widening the diameter of a borehole, comprising: (a) a rotating cutting body having a tapered exterior surface, a free borehole extending axially along a central longitudinal axis defining a inner surface and packing surfaces; (B) a plurality of circumferentially distributed stone crushing means located around the outer surface of the cutting body; (c) a ball bearing shaft journal adapted to be coupled to a cutting body, having a minimum and a maximum cylindrical diameter, and a primary and a secondary mounting end, the maximum diameter defining a shaft journal body which includes an exterior surface adapted to be rotatably coupled with the inner surface of a cutting body so that the cutting body is allowed to rotate freely relative to the bearing shaft pin, and where the minimum diameter defines a shaft portion, with packing surfaces, and the primary and secondary mounting ends are designed to enable rotatably locked positioning of the bearing shaft pin in a corresponding the support bracket of the cutting head plate, and a ball bearing passage is designed to extend as a free bore axially through the shaft pin body; (d) a series of diametrically opposed annular ball bearing grooves, each recessed to extend circumferentially around the outer surface of the shaft journal body and the inner surface of the cutting body; (e) a number of bearing balls distributed in roller contact with the annular ball bearing grooves; (f) a substantially cylindrical ball plug received intermittently in the ball bearing passage; and (g) means for sealing the cutting body when it is rotatably coupled to the bearing shaft pin.
    [5]
    The earth-drilling cutting device according to claim 4, wherein the row of annular ball bearing grooves comprises five grooves side-by-side.
    [6]
    The earth-drilling cutting device of claim 4, wherein the shape of the primary and secondary mounting ends of the bearing shaft journal includes a surface adapted to rest on top of a yoke with a substantially triangular upper surface.
    [7]
    The earth-drilling cutting device according to claim 5, wherein the number of bearing balls in each annular groove is twenty-two.
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    同族专利:
    公开号 | 公开日
    US20110220422A1|2011-09-15|
    ZA201101373B|2011-10-26|
    WO2010033097A1|2010-03-25|
    US8695732B2|2014-04-15|
    NO20110594A1|2011-04-15|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US3749188A|1971-08-20|1973-07-31|G W Murphy Indu Inc|Drill bit|
    US3950041A|1973-09-12|1976-04-13|Dresser Industries, Inc.|Rock bit bearing system for carrying out thrust|
    US4089382A|1977-04-04|1978-05-16|Hughes Tool Company|Cutter mounting for a large hole earth boring bit|
    US4760890A|1987-05-18|1988-08-02|Tamrock Inc.|Cutter assembly for rotary boring of earth|
    US5027911A|1989-11-02|1991-07-02|Dresser Industries, Inc.|Double seal with lubricant gap between seals for sealed rotary drill bits|
    US5363930A|1993-10-15|1994-11-15|Baker Hughes Incorporated|Dual-diaphragm lubricant compensator for earth-boring bits|
    JPH1137145A|1997-07-24|1999-02-09|Nippon Thompson Co Ltd|Track roller|
    ZA200203609B|2001-05-08|2002-12-12|Smith International|Mounting attachment and bearing system for an industrial earth-boring cutter.|
    法律状态:
    2012-07-24| NAV| Patent application has lapsed|
    优先权:
    申请号 | 申请日 | 专利标题
    PCT/US2008/010755|WO2010033097A1|2008-09-16|2008-09-16|Earth-boring cutter mount and assembly|
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