Патент USA US2408562код для вставки
Oct. 1, .1946. 2,408,561 w. |_. KEEHN DUAL AXLE TRAILER Filed Dec. 2e, 1944 5 sheetsèsneet 1 __» , _ _ _ _ _ __ ab ._ _ /M s@ wf m _ _. . „_ _ < N ntcr ß W , Oct. 1, 1946. w.-L. KEEHN 2,408,561 lDUAL AXLE TRAILER Filed Dec. 28, 1944 Bg 3 Sheets-Sheet 2 Wa/WE/Q/„fÀ Kee/m. Oct. 1, 1946. 2,408,561 v_v. L. KEEHN DUAL AXLE TRAILER à sheets-sheet s Filed Deo. 28, 1944 - .l|I W Wß L. mlm w ww. „fKW .f/f. .. PatentedL Oct. 1, 1946 2,408,561 UNITED STATES '.¿ÉAT'ENT OFFICE 2,408,56i Y DUAL Axrn TRAILER Warner- t vKeehn, Spokane, „ Wash. Application necember 2s, 1944, serial No. 570,203 5' Claims. (Cl. 28o-102) 1 . This invention relates to a trailer and more particularly to a trailer 'having dual axles, it be ing one object of the invention to provide a trail er with axles so mounted that when a turn is Y 2 ~ which may be referred to as walking beams, and a cross beamfor bunk 3> extending transversely‘of y the trailer over intermediate portions of the side beams. Back of the bunk the side beams have portions Ia and 2a which extend diagonally in crossed> relation to each other so that the rear portion of each side beam is at the opposite side of the trailer from the forward portion thereof. The diagonally extending portion of beam I is 10 formed" with a yoke 4 through which the diago made the two axles may both turn and thus pre- ~ vent wear upon the tires of wheels carried by one axle being `greatly in> excess of wearr upon the tires of wheels carried by the other axle. 'I'here fore, the wear upon the vtires of all the Wheels will Ibe approximately even instead of one set of tires wearing faster than thej other. Another object of theV invention is to so mount the axles that as one’is turnedabout its fifth nally extending portion of beam 2 passes. End portions o-f the side beams are formed with down wardly curved arms 5 terminating in transverse wheel, corresponding turning movement will be ly spaced tongues 6 through which a bolt 'I is transmitted. to the other axle and the two axles 15 passed for resting upon the upper leaf 8 of a thus caused to simultaneously turn for steering ~ spring structure 9. In spaced relation to each the trailer and preventing the tires of wheels end, each side beam is formed with transversely upon one axle being subjected to transverse rub spaced ears I Il" for carrying a bolt I I and each bing action which has a tendency to quickly wear spring structure has the innerend of its upper the treads of the tires. y , 20 leaf rolled to form a sleeve or hinge ear I2 through Another object of the invention is, to provide which the companion pin or >bolt I I passesto piv the trailer with walking beams so mounted that otally mount the spring’structure and permit the front and rear axles of the trailerwill 'be swung Y front and rear Wheels, I3 and I4, carried .by the in opposite directions when a turn is made, the axles I5- and‘IS, to follow uneven vsurfaces of a axles being provided with springsv which> permit 25 road-or move across rocks or other obstructions. vertical movement> of the same when the wheels The wheels turn freely'on the axles and each axle move along rough roads or across rocks or other carries saddles I'I spaced from its end Vand. dis-_ obstructions. v posed under the companion spring structures 9. Another object of the invention is to provide «the A» post I8 extends upwardly from each saddle for trailer with a tongue so connected with aL draft 30 passing through an opening I 9 in the bottom bar that after logs have been dumped, the trail plate 2l] of a housing v2| carried by the lower plate er may be shifted forwardlyuntil its front wheels 2`2 o-f a spring shackle 232 Since the posts I8 are rest upon a truck with which the trailer is con nected, the trailer being thus >hauled'when not rotatable in the housings 2I, pivotal movement is permitted between the axles and the side beams 35 and when the front axle I5 is turned in onedirec Another object ofthe invention is to provide a ti'on, the rear axle may turn in an opposite direc--v trailer which is very strong and capable of carry tion, as indicated by dotted lines in Fig. 1, and ing a heavy load of logs. v v loaded with logs. ` " . In the accompanying drawings: *_ the front and rear wheels of the trailer so» dis- 'ì that' the trailer will follow a turnmade' by Fig. 1 is atop plan view of the improved trailer. 40 aposed main truck to which the trailer is hitched. , Fig. 2 is a View showing the trailer partially in The trailer is turned toward one side or the side elevation and partially in section, the view other kby swinging the bunk horizontally, as indi being taken on the line 2-.--2 of Fig. 1. cated by dotted lines in Fig. 1, and referring to ’ Fig. 3 is a view taken longitudinally through the Fig. 5, it will beseen that the bunk. carries de tongue and draft bar on the line 3_3 of'Fig. 1. pending bearings 24 spaced from each other lon flfig; 4 is a fragmentary sectional view on the gitudinally of the bunk and through which'a line 4-4 of Fig. 1. v shaft l25 is mounted. Posts 26 extend downward Fig. 5 is a View taken transversely through the ly from' the shaft 2:5’ and, at their upper ends, are trailer on the line 5_5 of Fig. 2. i Fig. (i is a fragmentary view, on the line‘B-G of Fig. 1, showing the crossed portions of the lon gitudinally extending beams of the trailer. This improved traileris particularly adapted formed »with tubular cross . heads §21' through which the shaft passes. The posts 25 pass through openings 28 formed in the side beams I and 2 at the junction of the front ends of `their - diagonally extending portions with rear ends of their Vforward portions and lower ends of the' longitudinally extending side> beams Iv and 2, 55 posts 'protrudefrom the side beams and carry col for use for-hauling logs and has a frame including 2,408,561 _ 3 lars 29 having ears 30 at their outer sides to which are connected rear ends of torque arms or bars 3l having their front ends connected with ears 32 depending from the side beams. The collars 23 are connected by a strip 33 carrying an up standing strip 34 which is welded to the strip or plate 33 and has its upper end secured by a bolt 35 to a bracket 35 depending from a plate 31 sup ported upon upper faces of the side beams and formed with openings registering with the- open ings 28 through which the posts 26 pass. Flat strips 3d extending longitudinally of the trailer with the forward portions welded to forward por tions of the side beams and their rear end por tions slidably passing through the rear shackles 4 springs, housings carried by and depending from said springs, trunnions extending upwardly from said axles and rotatably received in the housings, a bunk extending transversely across said beams adjacent rear ends of their forward portions, a shaft under said bunk extending longitudinally thereof and rockably mounted, posts extending downwardly from said shaft and rotatably mount ed through openings formed vertically through ne side beams, collars carried by lower ends of said posts, a bridge connecting said collars and having an upper portion extending between and resting upon said'side beams and formed with openings registering with the post-receiving openings of the side beams, ears extending down wardly from said side beams forwardly of said 23 and serving to prevent the trailer'from weav- . v , posts, torque bars connecting said collars with ing when a load of logs rocks from side to side n said ears, side strips extending longitudinally of while traveling over rough roads. the trailer at opposite sides thereof with their Movement of the bunk 3 for steering the trailer forward ends ñxed to forward portions of the side is controlled by a tongue 39 which projects for 20 beams and their rear portions slidable longitudi wardly from the bunk midway the length thereof nally of the rear portions of the side beams, and and is braced by triangular webs 40 welded to its means extending forwardly from the bunk for opposite sides and to the front face of the bunk. connection with a towing vehicle. This tongue extends forwardly over the front 2. A trailer comprising side beams each having 25 axle and, at its front end, carries a yoke or cradle forward and rear portions at opposite sides of 4I which is U-shaped in cross section and welded the trailer and a diagonal intermediate portion to the tongue with a portion projecting forwardly connecting its end portions, springs carried by therefrom. Hinge ears 42 extend downwardly at ends of said side beams, front and rear axles ex opposite sides of a slot at the front end of the tending transversely of the side beams under said cradle 4l and carry a pin 43 which passes through 30 springs and pivotally connected with the springs the-depending ear 44 of a sleeve 45 and pivotally for swinging movement about vertical axes under mounts the sleeve for vertical tilting from a hori the springs, a bunk extending transversely across zontalposition in which it rests in the cradle, as said beams adjacent rear ends of their forward shown in full lines in Fig.V 3, to the inclined posi portions, a shaft under said bunk extending longi tion indicated by dotted lines in this figure. A 35 tudinally thereof and rockably mounted, posts bar or strip 46 is welded to the sleeve and extends extending downwardly from said shaft and ro longitudinally thereof with its rear portion pro tatably mounted through openings formed verti jecting from the sleeve for engagement between cally through the side beams, and means extend -tongues 41 rising from the rear end of the cradle. ing forwardly from said bunk for connection 40 A pin 43 which is passed through the tongue 41. with a towing vehicle. vand the rear end of the bar 46, normally holds 3. A trailer comprising side beams each having the sleeve alined with the tongue so that the draft forward and rear portions at opposite sides of bar 4S passing through the sleeve will be alined the trailer and a diagonal intermediate portion with the tongue and, at its rear end, the draft connecting its end portions, springs carried by bar’carries a collar 50 which limits its forward 45 movement through the sleeve. AWhen the trailer is loaded and is being towed behind a logging truck, the tow bar or draft bar -remains in alinement with the tongue 39 and the trailer follows the truck. As turns are made, the 50 bunk is swung and the side beams shifted longi tudinally in opposite directions so that the front and rear axles will be swung in opposite direc tions, as indicated by dotted lines in Figure 1 and `the trailer caused to> follow the truck. After a 55 vload has been dumpedfrorn the truck and trailer, the pinV 48 is removed and the tow bar may tilt vertically to allow the trailer t0 be shiftedr for --wardly upon its rear wheels I4 until its front wheels >I3 rest upon the truck. The sleeve 45 60 slides-forwardly along the tow bar 49 as the trailer is shifted forwardly or rearwardly. Since the rear end of the tongue 39 is rigid with the bunk 3 `and the bunkY is pivotally connected with the shaft 25 by bearings 24, the tongue and the tow bar may have vertical pivoting movement rela tive to the frame of the trailer while a loaded trailer is being towed back of a logging truck. ‘ What is claimed is: ,ends of said side beams, front and rear axles ex tending transversely of the side beams under said springs and connected therewith for pivotal movement 'about vertical pivots, a bunk extending transversely of the trailer over the side beams at junctions of forward portions of the beams with .their diagonally extending intermediate portions, means mounting the bunk for tilting about an axis extending transversely of the trailer and piv ally connecting the bunk and the side beams for pivotal movement about vertical axes to shift the side beams longitudinally and swing the front and rear axles in opposite directions for steering the trailer, and means extending forwardly from the bunk for connection with a towing vehicle. 4. A trailer comprising side beams each having forward and rear portions at opposite sides of the trailer and a diagonal intermediate portion connecting its end portions, front and rear axles extending transversely of the side beams under end portions thereof and connected therewith for pivotal movement about vertical pivots, a bunk extending transversely of the trailer over the side beams at junctions of the forward portions of the beams with their diagonally extending inter ' 1. A trailer comprising side beams each having 70 mediate portions, bearings extending downwardly forward and rear portions at opposite sides of the from said bunk, a shaft under said bunk extend vtrailer and a diagonal intermediate portion con ing longitudinally thereof through said bearings necting its end portions, springs carried by ends and mounting the bunk for rocking movement, posts extending through openings formed through -ing transversely of the sideV beams under said 75 of said side beams, front and rear axles extend 2,408,561 5 the side beams at the junction of their forward portions with their intermediate portions where by the bunk may be swung horizontally about Vertical axes and the side beams shifted longi tudinally for swinging the axles horizontally `in opposite directions to steer the trailer, and means carried by `and projecting forwardly from said Y bunk for connection with a towing vehicle. , 5. A trailer comprising Side beams each having a forward portion and a rear portion at opposite sides of the trailer and an intermediate portion extending diagonally between the front and rear` portions, front and rear axles extending trans versely under front and rear ends of the side 6 beams and connected therewith for swinging movement horizontally about vertical axes, a bunk extending transversely across the side beams adjacent rear ends of their forward por tions, means for supporting said bunk over the side beams engaged with the side beams to permit horizontal swinging of the bunk- longitudinally of the trailer and longitudinal shifting of the side beams for swinging the axles in opposite direc tions to steer the trailer, and means extending ' forwardly from said bunk for connection with a towing vehicle. WARNER L. KEEHN.