Патент USA US2116708код для вставки
May 10, 1938. ' R; A. NIEKAMP - APPARATUS FOR COMPACTING CONCRETE ÄND THE LIKE Filed Jan. 1l, 1936 2,115,708 Patented May IÓ, 1938 2,il6,708 lUNITED STATES PATENT OFFICE 2,116,708 AVPPARATUS FOR COMPÀCTING CONCRETE AND THE LIKE Richard A. Ñ-iekamp, Dayton, Ohio, assignor to The Master Electric Company, Dayton, Ohio, a corporation of Ohio Application january' 11, 193s, serial No. 58,784 4 claims. (ci. 259-72) This invention relates generally to apparatus eilîect, form a single section since they are rigidly bolted together by the bolts 6. for compacting concrete or other plastic ma terial, and more particularly to a vibrator adapted to be submerged in the material and vibrated so as to compact it. T_he invention provides a means for vibrating and compacting concrete so as to produce a dense strong product which is homogeneous in charac ter~ from a mix in which the proportion of water 10 to concrete is relatively small. In the accompanying drawing which illustrates two embodiments of my invention, Figure 1 is a longitudinal vertical section through a vibrator; » ' Figure 2y is an enlarged vertical section of a portion of the apparatus shown in> Figure 1; and , ' The intermediate and lower casing sections are provided with vanes I9 extending outwardly from the body portions of the sections. In the em bodiment shown, the vibrator has four of these vanes, but this number may be varied if desired. The vanes I9 at the portions adjacent the flanges 'I and 8 are of substantially the same width as the flanges. The width of the ilanges, however, decreases in a direction upwardly from the flange 8 so as to provide a reduced or neck .portion 20 of a diameter substantially equal lto the diameter of the body portion of the intermediate section 4. The width of the flanges then increases so that 15 in the region of the flange I2 at the upper end of the intermediate casing section, the vanes I9 Figure l3 is a longitudinal vertical section through another embodiment of the invention, are of substantiallyv the same width as the flange parts’being broken away.A compacting action on the concrete. The reduced 20 or neck portion 20 provided on the vibrator by narrowing or eliminating the vanes I9 at that portion enables the concrete to close in about the vibrator at the neck portion so that vibration is Referring more particularly to the embodi ment illustrated in Figures 1 and 2, the vibrator has a casing indicated generally by the reference nume-ral 2. The casing is formed of an upper section 3, an intermediate section 4, and a lower section 5. 'I'he lower section is connected to the intermediate section by bolts 6 extending through llanges 'I and 8 formed on the sections 5 and 4, respectively. Sealing material 9 is placed be tween the ilanges to prevent leakage of cement into the hollow'interior of the vibrator. The lower portion of the upper casing section 3 is formed with an annular groove I0 and an outwardly extending flange II. The upper end of the intermediate section 4 is provided with an outwardly extending ilangel I2. The ilanges II and I2 are spaced apart by an annular washer I3 of rubber or other resilient material. Bolts I4 extend through the flanges II and I2, and a rubber washer I5 is inserted around each of the bolts between the flange' I2 and a metallic washer I6. Surrounding each of the bolts is a non Q resilient metallic spacing sleeve Il which contacts with the flange II and the washer I6. The open ings I8 in the flange I2, through which the bolts I2. The vanes I9 increase the eiliciency of the imparted to the concrete radially in all directions, 25 that is, laterally, downwardly and upwardly, thereby increasing the effectiveness of the vi brating action. An electric motor indicated generally by the reference numeral 24 is located in the upper cas 30 ing section 3. The stator 25 of the motor lits tightly Within the casing section 3 and rests on an inwardly extending flange 26. Electric cur rent is supplied to the windings 2`I- of the stator by means of a flexible conduit 28 which extends 35 upwardly through a head 29 and through a cou pling section 30 to which a flexible hose, not ` shown, may be connected. The flexible hose is provided with a handle which may be grasped by the operator, the ilexible hose further decreasing 40 any transmission of vibration to the hands of the operator. The conduit 28 extends through the flexible hose to a source of electric current. Seal ing means 3| is provided in the head 29 for pre venting inleakage of concrete. . 'I‘he drive shaft 32 of the motor armature 33 Ais and spacing sleeves extend, are somewhat larger ì mounted in ball bearings 34 and 35 supported, than the diameter of the spacing sleeves so as to leave a space between the sleeves and the flange. This enables the intermediate section 4 respectively, in heads 29 and 35a, the motor, bearings and electrical conductor 28 all being located in the upper casing section 3. The motor and the vlower section 5 of the casing to vibrate ' or driving shaft 32 is connected to a driven or a ‘limited amount relative to the upper casing eccentric shaft 34 by means of a flexible driving section 3 without causing vibration in the upper connection 38. In the embodiment shown in section which contains the driving motor. The Figures 1 and 2, this flexible driving connection intermediate section 4 and the lower section 5, in is made of rubber and is provided with recesses 45 2 2,116,708 31 and 38 for receiving the shafts 32 and 34, respectively. Each of the shafts is provided with splines 39 and the shafts are molded into the ñexible coupling. This provides a flexible re silient dn'ving connection between the drive shaft preventing the vibration from'being transmitted from one section tothe other. It has been found to materially increase the life of the vibrating apparatus. In the embodiment illustrated in Figure 3, I and the eccentric shaft. ~ „ have shown the eccentric shaft 51 in an offset A weight 40 is mounted eccentrically on the position relative to the drive shaft 54. This ar shaft 34 so that upon rotation of the shaft the- rangement increases the vibration of the lower weight causes vibration of the casing sections 4 casing section. The offset arrangement of the 10 and 5 relative to the upper casing section 3. The eccentric shaft with respect to the drive shaft eccentric shaft 34 is mounted in roller bearings may be employed not only with the internal gear 10 Il and 42 carried by heads 43 and 44, respec tively. . When the driving motor is operated, the shafts 15 32 and 34 are rotated, causing rotation of the eccentric weight 40. 'I’his causes the casing sec » tions 4 and 5 to vibrate in a circle relative to the upper casing section 3, this vibration being l permitted due to the resilient connection be tween the casing sections 3 and 4. The vibration is transmitted radially in all directions .due to the shape of the vanes I8.- ‘I‘he resilient cou pling and sealing means between the casing sec tions 3 and 4 prevents vibration being- transmit ted to the upper section which contains the mo tor and motor bearings andlalso prevents vibra _tion from being transmitted to the operator. 'I?‘he embodiment illustrated in Figure 3 is, gen erally speaking, similar to> that just described, except that instead of employing a resilient driv ing connection between the driving shaft and ec centric shaft, an internal gear- and pinion is employed. Also, in the embodiment shown in Figure 3, the eccentric or driven shaft is located so as to be oil'set or out of alinement with the driveshaft. Referring vto Figure 3, the casing is and pinion driving connection illustrated in Fig ure 3, but may be employed also in connection with- the resilient driving connection 36 illus trated in Figure l. In-this case the recesses 31 15 rvand >38 provided in the rubber coupling 38 are offset to receive the drive shaft and driven shaft. I have illustrated and described two embodi ments .of my invention. It is to be understood, however, that the invention may be otherwise embodied within the scope of the following claims. I claim; 1. Apparatus for compacting concrete and the like, comprising a casing formed of a plurality of sections, resilient coupling means connecting the sections together, a motor having a drive shaft and bearings therefor all located in one sec tion, an eccentric shaft, bearings therefor and an eccentric weight associated with the eccentric shaft all located in another- section, and a yield 30 ing driving connection between the drive shaft and the eccentric shaft, the drive shaft and eccentric shaft being out of alinement with each other. ' ` 2. Apparatus for compacting concrete and the like, comprising a casing formed of a plurality formed of an upper sertion 50, an intermediate section 5l and a lower section 52. The sections 50 and 5| are connected together by resilient couplingL and sealing means 53 similar toI that previously described so as to allow relative vibra tion between the .two sections of the casing. An internal gear 54a is secured to the lower end of the drive shaft 54. A pinion 55 located inside of the gear 54a and meshing with the teeth 56 of the gear is secured to the upper endV of a driven or eccentric shaft 51. 'I'he eccentric shaft of sections, resilient coupling means connecting ' the sections together, a motor having a drive shaft and bearings therefor all located in one section, Aan eccentric shaft, bearings therefor and 40 an eccentric weight associated with the eccentric shaft all located in another section, and an in terna] gear and pinion driving connection be tween the drive shaft and eccentric shaft,` the drive shaftv and eccentric shaft being -out of 45 is mounted in roller bearings 53 and 59, and se cured te the shaft intermediate these bearings like, comprising a casing formed of a plurality of sections having spaced apart flanges on their adjacent ends, resilient sealing means between the is an eccentric weight 6I. Rotation of the eccen tric weight causes vibration of the casing sec tions 5i and 52 relative to the upper casing sec tion 5l, as in the embodiment previously de scribed. The pinion 55 tits loosely in the internal gear 54a so as' to allow for this relative vibration of the casing sections and still provide a flexible driving connection for the eccentric- weight. 'I'he formation of the casing in a plurality of sections provides ready access to the operating mechanism located within the casing. -It has been found that'where the casing is made ina plurality ci' sections rigidly connected together by bolts without the use of a _resilient connec ` tion between the sections, the vibration is trans 65 mitted from the lower to the upper section, rap idly wearing out the bolts and 'causing the sec tions to fall apart or at least' to allow leakagel of cement into the interior. The resilient cou pling and sealing means, particularly when em 70 ployed in connection with the non-resilient spac-> alinement with each other. 3. Apparatus for compacting concrete and the flanges, bolts extending through the flanges and sealing means and connecting the sections to gether in such manner as to allow relative move ment between the sections, non-resilient spac ing sleeves surrounding the bolts, and means in-> 55 side the casing for causing vibration of the diner ent sections relative to each other. of sections, said casing adapted to be submerged in the concrete. resilient coupling means con necting the sections together, a motor having a drive shaft and bearings therefor, all located in one section, an eccentric shaft, bearings therefor andan eccentric weight associated with the ec centric shaft, all located in another section, a yielding driving connection between the drive shaft and the eccentric shaft, and i‘lexible sup porting means connected to the casing whereby the section of the casingcontaining the motor ing sleeves surrounding the bolts, provides an _ may be submerged in the concrete. effective arrangement for- allowing limited rela tive vibration between the casing sections and ' 4. Apparatus for compacting concrete and the like, comprising aV casing formed of a plurality ' ' RICHARDA. NEKAMP.