专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

21. 发明专利

FR926952A 未知
公开(公告)号：FR926952A
公开(公告)日：1947-10-16
申请号：FR926952D
申请日：1946-05-15
申请人： FELLOWS GEAR SHAPER CO
IPC分类号： B23F5/02

22. 发明专利

FR925983A 未知
公开(公告)号：FR925983A
公开(公告)日：1947-09-18
申请号：FR925983D
申请日：1946-04-24
申请人： FELLOWS GEAR SHAPER CO
IPC分类号： B23F15/06 , B23F21/16

23. 发明专利

GB563777A Method and apparatus for generating toothed gears 未知
公开(公告)号：GB563777A
公开(公告)日：1944-08-29
申请号：GB320643
申请日：1943-02-26
申请人： FELLOWS GEAR SHAPER CO
IPC分类号： B23F5/02
摘要： 563,777. Gear-cutting. FELLOWS GEAR SHAPER CO. Feb. 26, 1943, Nos. 3206 and 3207. Convention dates, Feb. 10, 1942, and Feb. 12, 1942. [Class 83 (iii)] In a method of and apparatus for generating gears, the gear blank, such as A, Fig. 5, is rolled without slip on a curved pitch line represented by an internal gear having its centre at B. the pitch line itself being rolled as on a rack R represented by a pair of plane-faced grinding wheels or other tools T, T . Thus, a number of blanks W -W are rolled under the control of master gears engaging an internal gear with teeth Gi arranged coaxially with an external gear, teeth Ge, rolling on the rack R. Two stages in the generation of involute teeth by this combination of movements are shown in Figs. 6 and 8, it being assumed that the gear assemblage rolls on the rack to right (rotation in direction of arrow a, Fig. 5) while the work gears move orbitally in the opposite direction (arrow a ) resulting in a rotation in direction of arrow a . It is also assumed that the components a and a are equal so that the movement of the gear axis being indicated by the points A and A in Figs. 6 and 8 respectively, the axis B moves the same distance in the same direction and the pitch circle P , C of the gear blank remains in contact with the pitch line P , C of the rack represented by the tools. In a machine embodiment, the orbital movement is preferably rapid and unidirectional, while the rolling is slow and is reversed periodically and complete generation of all the teeth is effected only after a considerable number of orbital rotations. A base 11 has uprights 12, 13 supporting a slidable carriage 16. The grinding-wheels are located beneath the carriage in housings 19, 20 and are driven by hydraulic motors 22, 23. The mounting and adjustment of the grinding-wheels for finishing either spur or helical gears may be as described in Specification 554,115. The work carriage includes a central shaft 26, Fig. 18, supported in outboard members 27, 28, suspended from bars 29, 30. The shaft 26 has keyed thereto a headstock carrier 31 and tailstock carrier 32 between which are located the work spindles 37 carrying the blanks W -W . Adjusting hand-wheels 41 are provided for the tailstock centres 36. Rotation is imparted to the shaft 26 to give orbital movement to the blanks by means of an hydraulic motor 43 which drives through a yieldable rubber coupling 46 to absorb vibration. The work spindles carry master gears 47 meshing with an internal gear 48 and preferably having the same number of teeth as the work gears. The internal gear Ge of Fig. 5 is represented by a cam 51 having involute faces 52, 53, Fig. 3, which coact with abutments 54, 55 representing the rack R and having a limited range of pressure angle adjustment. The abutments are secured to holders mounted on slides 61 moved to or from each other by a right- and left-hand threaded spindle 63. The carriage 16 is reciprocated by an hydraulic cylinder, the reversal being controlled by dogs on the carriage. During this movement the former reacts against the abutments to impart rolling movement to the gear 48 on the theoretical rack. The abutments may be displaced by screw 63 to apply depth feed to the work. In some cases the machine may have different work-spindles arranged at different distances from the central axis B so that gears of different diameters may be finished in one operation. In another modification, a singlespindle machine is arranged to finish gears one at a time. In this form, Fig. 12, the internal gear may: be only slightly larger than the master gear 47 and gear W being finished and high speeds of revolution may be employed. The number of teeth of gear 47 is preferably prime to that of the gear 48. Alternatively, indexing mechanism may be employed. In this form, Fig. 18, each spindle is coupled to its master gear through an index plate 80 coacting with a carrier plate 81 and pawl. A hydraulic, torque motor supplied by passages 92, 93 operates the indexing mechanism. The pawl has a tail which during the orbital movement is engaged by a stationary dog 100 on the bar 30, thus lifting the pawl momentarily and allowing the torque motor to rotate the spindle and index plate one tooth relatively to the master gear. A modified arrangement of this type of indexing mechanism is also described. In another modified form of indexing mechanism, a brake device is provided to retard the spindle when it is uncoupled from its master gear, the brake shoes 106, Fig. 22, being actuated by hydraulic pressure through a line 108. In all modifications, the abutments engaging the cams may be angularly adjusted to generate different face curves on the teeth. Thus, if the abutments are set at an angle to the median line of n , Fig. 16, which is smaller than the pressure angle setting n of the grinding wheels, it is shown that the gears generated will mesh with mating gears at a pressure angle n greater than n and the teeth are generated from a smaller base circle b , c than the normal base circle b, c. Similarly, if the angle n is greater than n, the teeth generated will have pressure angles smaller than the normal. In another modification, a single grinding wheel having a pair of conical faces operating on opposite sides of the same tooth space may be used,

24. 发明专利

GB555120A Generative gear and like cutting machine 未知
公开(公告)号：GB555120A
公开(公告)日：1943-08-05
申请号：GB1545841
申请日：1941-12-01
申请人： FELLOWS GEAR SHAPER CO
IPC分类号： B23F1/02 , B23F5/06 , B23F23/12
摘要： 555,120. Gear-cutting. FELLOWS GEAR SHAPER CO. Dec. 1, 1941, No. 15458. Convention date, Dec. 20, 1940. Addition to 536,997. [Class 83 (iii)] The machine for generating the profiles of gear teeth of the like set forth in the parent Specification is modified in that the work spindle and generating cam-shaft mounted on parallel axes on a reciprocable carriage are coupled by a connecting rod of the same length as the distance between the spindles. The frame supports an annular bed 25 which is adjustable about a vertical axis for generating helical gears. A table 26 on the bed carries a reciprocable work carriage 27 moving beneath an adjustable grinding-wheel 28 supported from the part 24 of the frame. The carriage is reciprocated to roll the work past the cutter by a cam 29 coacting with an abutment 30, return movement being effected by a weight, 291. The cam is mounted on a shaft 31 oscillated from a motor 33 in the manner described in the parent Specification. The work-spindle 43 carrying a blank 46 is carried between centres 44, 45. An arm 47 on the cam shaft is connected by a coupling rod 48 to an arm 49 loosely mounted on the work spindle, the length of the rod being the same as the distance between the centres of the work and cam shafts. The arm 49 carries a pawl engaging an index wheel 55 fixed to the work spindle, the pawl being normally held in engaged position by a spring 57 thus coupling the cam and work shafts so that they rotate in unison. For indexing, a motor 61 applies a torque to a pulley 56 on the index wheel through a slipping belt 59. When the work has rolled clear of the tool a pin 62 on the pawl engages a trip 63 on the carriage, the pawl being thus lifted and the work immediately indexed by the applied torque. The trip member is adjustable and is spring mounted so that it can be moved away from the pin 62 on the return movement. The work spindle may be advanced relatively to the cam 29 to increase the depth of cut. For this purpose the cam is keyed to a sleeve 71 loose on the shaft 31, the sleeve having arms 72 embracing a yoke 75, Fig. 10, and connected thereto by keys 73 engaging inclined grooves 74 in the yoke which is itself connected by keys 77 to a collar 78 on shaft 31. The yoke is mounted on a shaft 80 which is spring urged towards an abutment 83. Axial movement of the yoke 75 through the abutment 83 causes the yoke to be rotated through the inclined key-ways 74, this movement being transmitted through keys 77 to shaft 31 and thence to the work spindle. The keys are tapered and are adjusted to take up wear by screws 87. The inclinations of the grooves engaged by the keys 73, 77 respectively may be modified according to the fineness of angular adjustment desired. Traverse of the work carriage forward and' back with indexing at the end of each return traverse is repeated until all the teeth are ground. In some cases the abutment 83 may be actuated automatically to apply a feed after each revolution of the work. The grinding- wheel may be replaced by a milling-cutter. Specification 555,145 is referred to.

25. 发明专利

GB540520A Right and left hand helical guide for machine spindles 未知
公开(公告)号：GB540520A
公开(公告)日：1941-10-20
申请号：GB1507640
申请日：1940-10-09
申请人： FELLOWS GEAR SHAPER CO
IPC分类号： B23F5/16 , B23F23/12
摘要： 540,520. Gear-cutting. FELLOWS GEAR SHAPER CO. Oct. 9, 1940, No. 15076. Convention date, Oct 2, 1939. [Class 83 (iii)] A machine, such as a gear generator of the reciprocating pinion cutter type, wherein a cutter or work spindle has a combined reciprocating and rotary movement, has spindle guiding means comprising a number of helical elements spaced around the spindle axis and co-operating relatively stationary means which may be selectively engaged with either of the helical elements. Two helical elements of opposite hand may be provided so that helical gears of either hand or herring-bone gears may be cut. The cutter saddle 11 carries the spindle 12 of the pinion cutter 13 while the work 15 is mounted on a spindle 14. Generating rotary movement is imparted to the cutter spindle by worm gearing 16. The spindle carries a sleeve 18 having two opposed helical guide grooves 29, 30 of opposite hand, coacting respectively with guide shoes 19, 20 formed with ribs 31 engageable with the grooves and adapted to slide radially in a sleeve 23 which is secured to the hub 24 of the generating gear 16. The shoes may be radially adjusted by their respective screws 34, 40 so that either of them engages the co-operating groove to turn the spindle in either direction on its cutting stroke. In addition to cutting gears right- or left-hand helical slots may be formed in clutch elements. The invention may be applied to machines wherein the parts 23, 24 have no rotary generating movement. The helical grooves may be of the same hand but different helix angles and may in some cases cross each other. More than two sets of grooves and shoes may be employed.

26. 发明专利

GB536997A Generative gear cutting machines 未知
公开(公告)号：GB536997A
公开(公告)日：1941-06-04
申请号：GB482640
申请日：1940-03-14
申请人： FELLOWS GEAR SHAPER CO
IPC分类号： B23F5/06 , B23F23/12
摘要： 536,997. Gear cutting or grinding. FELLOWS GEAR SHAPER CO. March 14, 1940, No. 4826. Convention date, March 16, 1939. [Class 83 (iii)] In a machine for generating the profiles of gear teeth or like articles the work is rolled past a fixed cutting or grinding tool, and is mounted on a carriage reciprocated by a cam bearing against a fixed abutment, the work and cam spindles being spaced apart in the direction of the carriage movement and having a driving connection by which they are simultaneously actuated. The machine frame has a recessed base 21 fitted with uprights 24, 25, supporting a cross-beam 26. The tool, shown as a grinding wheel having a plane operating face is carried in a head 32 adjustably secured to the cross beam. A carriage 28 moving over the table 27 carries preferably parallel cam and work spindles 33, 29, respectively. The spindle 33 carries a holder for the adjustable involute cam 35 which bears on the adjustably fixed abutment 37. The cam holder is connected by a link 39 to a crank disc 41 driven from a motor 42 through belt gearing 43, and worm gearing 49 thus oscillating the cam and traversing the carriage the return being effected by a weight 52. In order to impart corresponding rotary movement to the work, the cam shaft carries a toothed sector 57 engaging a circular rack part 58a of a member 58 provided with a screw portion 58b engaging a gear 59 on the work-spindle. By rotating the member 58 the work spindle is rotated for indexing without affecting the cam spindle 33. Power for the indexing movement is derived from a torque motor 66 which acts through gearing 68, shaft 70 and gears 72 on an extension of member 58. The motor shaft is also geared to a shaft 78 carrying an index plate 77 engaged by a stop plunger which normally holds the indexing motor stationary but which may be released to allow the revolution of plate 77 to give the indexing movement, which may be varied by change gears. The locking pin 76 is released by the carriage 28 at the end of the withdrawal stroke when the work is clear of the tool. At this point a projection 86 on the cam shaft engages a collar 90 to shift an arm 87 connected by linkage, Fig. 10, to a pusher block 97 having a face concentric with the index plate. A spring-pressed pivoted arm 98 engaging the pusher face carries a pawl 104 actuating an arm on a shaft 106 connected by rack and pinion to the index plunger. When the pusher is moved forward the parts are moved to the Fig. 13 position, withdrawing the plunger and allowing the index plate to rotate through one revolution. A gear segment 113, Fig. 10 is driven from manually-operated gearing 118 and worm gear 114 to advance the stop plunger angularly and so rotate the work to increase the depth of cut. The bracket 100 is locked when the desired depth is reached. Before the locking bolt engages the index plate the latter is braked to lessen the shock by a shoe 125 spring pressed against a drum 124 on the torque motor. A cam 135, Fig. 5, normally holds the brake disengaged but just before the stopping of the index plate a depression in the cam allows the brake to engage its drum. The grinding-wheel is adjustable laterally, angularly and axially. The tool-head 32 carries a spindle 139 driven through a belt 170 from a motor 140. The head moves parallel to the grinding face in guides 141, 142 formed on a base resting through rolls 145 on the arcuate upper surface of a ledge 146 on the cross-beam. The base also has an axial arcuate flange by which it may be secured to the cross-beam by clamps 148 so that when the clamps are loosened the head may be angularly adjusted to place the grinding face in any position between the vertical and about 25 degrees the inclination being measured by a scale 150. Lateral adjustments of the grinding-spindle are effected from a hand wheel 151 through shaft 155 and rack-andpinion gearing 157. Axial adjustment is effected in conjunction with a trueing tool 158 carried by a pivoted arm 159. The grinding-spindle is for this purpose mounted in a sleeve 160 which is moved axially by a screw engaging a tapped hole in the casing 161. The forward and rear ends of the spindle are carried in tapered bearings 172, 173, the rear bearing being movable to take up wear. A thrust bearing 174 is forced outwardly by springs 175 and holds a shoulder 176 on the spindle against a thrust washer 177. Lubricant such as kerosene is contained in a chamber 178 and passes through a filter 179 to an oil channel 181 and finally to a basin 182 whence it is circulated by a pump 184 driven by a belt 185. A member 187 co-acts with the wheel centre 188 to exclude dust. The abutment 37 is carried.on a plate 194 which may be angularly adjusted about a pivot 195 on a slideplate 196, by hand-operated worm gearing 202. Adjustment of the slide 196 in the direction of movement of the carriage 28 may be effected by a screw. The work arbor 29 passes with clearance through a quill 212 in which it is centred by a collet 213, Fig. 2, a nut 214 being loosened to adjust the arbor 29 to the required axial position. The free end of the arbor is carried on a dead centre 215 in a bushing 216 concentric with the quill. The gearing 58b, 59 and the quill bearings are enclosed in a housing 220 and protected by a flexible rubber bushing adjacent the work. For finishing helical gears the work-spindle axis and the carriage path are set to the required inclination. For this purpose table 27 is rotatable on the bed 23 in concentric curved guides and the crank shaft and its driving gear is suspended from the table. The adjustment is effected by worm gearing from a shaft 227 and is indicated by a scale 228. The pulley 44 of the driving mechanism is co-axial with the table. The rolling circle of the mechanism may be varied from 1 inch to 12 inches. A single involute cam 36, Fig. 20, may be used with the abutment 37 and wheel 31 to generate the curve b with a base circle B or with abutment 37a and a wheel 31a it will generate curve c with a base circle C. Other settings within or outside these limits may also be used.

27. 发明专利

GB535918A Method and apparatus for gear generation 未知
公开(公告)号：GB535918A
公开(公告)日：1941-04-25
申请号：GB620140
申请日：1940-04-05
申请人： FELLOWS GEAR SHAPER CO
IPC分类号： B23F5/16 , B23F5/18 , B23F15/06 , B23F21/04 , B23F23/08
摘要： 535,918. Toothed wheels. FELLOWS GEAR SHAPER CO. April 5, 1940, No. 6201. Convention date, April 5, 1939. [Class 80 (i)] [Also in Group XXII] In a method of and apparatus for generating either cylindrical or face gears and similar toothed articles the cylindrical gear member and the face gear member are rotated together in unison in offset relation, Fig 4, one of the members having cutting teeth and serving to generate the conjugate teeth of the other member by a cutting action produced by the relative slipping between the cutter and gear teeth. caused by the offset relation of the axes. When an involute pinion 20 is rotated in unison with a plastic face gear with an intersecting axis it will mould conjugate straight teeth of which the flanks have greater inclination at the outer than the inner circumference. When, as shown in Fig. 4, the pinion axis is offset by a distance y from the axis of face gear 22a the moulded teeth are tangential to a circle of radius y and the teeth as before are of straight section in planes normal to their length and of gradually increasing slope towards the outer diameter. A helical generating pinion operating in an offset position will similarly generate helical face gear teeth. In Fig. 6, if C represents a circle of the face gear and e, f a corresponding transverse plane of the pinion then the offset of the axis represented by the distance g, f may be represented by the angular displacement B. If V1 represents the length of action on the face gear and V2 the length of action on the pinion, then V3 represents the slip between the pinion and gear teeth and is equal to V2 tan B. This slip is used according to the invention for cutting either the pinion from a face gear cutter or the face gear from a pinion. For cutting face gears the end surface of the pinion has cutting teeth and the tooth faces are relieved to provide clearance. The cutter is then fed axially across the face of the gear. Preferably a number of traverses across the gear are made, depth feed being applied between the traverses. When helical cutters are employed they are given a helical twisting movement during the traverse in addition to the indexing rotation. A helical cutter 26a may be arranged in an offset position Fig. 11, to generate straight radial teeth. For generating cylindrical gears a face gear cutter 28, Fig. 18, is employed the teeth being relieved along the edge 30 to provideclearance. Helical gears may be generated by added rotation related to the feed movement or by the converse arrangement to that shown in Fig. 11. By inclining the direction of feed to the pinion axis tapered teeth may be generated. In a machine for carrying out the invention the pinion member 32 is supported on a spindle 33 and the face gear member 28 is mounted on a spindle 35 carried by a head 36 movable along an angularly adjustable table 38 which is itself supported on a movable table 39. The offset is determined by the vertical adjustment of the knee 40. By adjustment round the pivot 41, the face gear member may be cut with taper teeth to provide side clearance and top rake as is required to produce the cutter member shown in Fig. 18. The cutters used may have either integral or detachable teeth. The latter may be mounted in a head 48 having radial guideways formed with slots 50. Cutter elements each with two teeth 53 are secured by bolts 54 passing through the slots 50. The individual teeth are non-radial, being parallel to a radius such as s, t, the head flange 49 being dished to provide the required top and side clearance. In a modification the inserted teeth may be skewed to cut a straight spur gear in the manner shown in Fig. 4. The cutters are sharpened by grinding the end faces and are then reset to their original position by adjustment along the slots 50. U.S.A. Specification 676,226 is referred to.

28. 发明专利

DE692215C 未知
公开(公告)号：DE692215C
公开(公告)日：1940-06-19
申请号：DEF0078925
申请日：1935-02-26
申请人： FELLOWS GEAR SHAPER CO
IPC分类号： B23F19/04

29. 发明专利

FR838731A 未知
公开(公告)号：FR838731A
公开(公告)日：1939-03-14
申请号：FR838731D
申请日：1938-05-31
申请人： FELLOWS GEAR SHAPER CO
IPC分类号： B23F23/12

30. 发明专利

FR812300A 未知
公开(公告)号：FR812300A
公开(公告)日：1937-05-04
申请号：FR812300D
申请日：1936-10-23
申请人： FELLOWS GEAR SHAPER CO
IPC分类号： B23F19/04 , B23F19/06 , B23F21/28

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式