CA1044475A - Post driving machine - Google Patents
Post driving machineInfo
- Publication number
- CA1044475A CA1044475A CA251,035A CA251035A CA1044475A CA 1044475 A CA1044475 A CA 1044475A CA 251035 A CA251035 A CA 251035A CA 1044475 A CA1044475 A CA 1044475A
- Authority
- CA
- Canada
- Prior art keywords
- hammer
- tool
- post
- driving tool
- stanchion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
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- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims abstract description 9
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- HCTVWSOKIJULET-LQDWTQKMSA-M phenoxymethylpenicillin potassium Chemical compound [K+].N([C@H]1[C@H]2SC([C@@H](N2C1=O)C([O-])=O)(C)C)C(=O)COC1=CC=CC=C1 HCTVWSOKIJULET-LQDWTQKMSA-M 0.000 description 1
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- 239000000725 suspension Substances 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
Landscapes
- Earth Drilling (AREA)
Abstract
ABSTRACT
An improved portable hydraulically powered driving machine, for driving posts, ground anchors, concrete breakers, core drills, and the like work pieces into the ground, pavements or wall structure, has a tower in the form of a stanchion carried by an extensible pedestal mounted boom rig on a mobile base such as a conventional truck and in its working position is adapted to rest on the ground, pavement or wall structure at a controlled attitude relative thereto to guide a hydraulically powered hammer and hold an anvil against the work piece and, in its transporting position is adapted to be secured horizontally at a low level in a truck-mounted frame. The stanchion down-crowds the hammer guide to load a compression spring which maintains the anvil continuously against the work piece even after the impact force of the hammer blow is expended and the work piece advances a considerable distance. The hammer is also spring-loaded, a hydraulic jack lifts the hammer and stretches the spring and the stroke of the hammer together with the rapidity of the hammer blows is controlled by a rotating dump valve for the jack. The speed of rotation of the dump valve is controlled by the machine operator with faster speeds decreasing the stroke of the hammer and increasing the number of blows delivered per minute.
Hydraulic controls are provided to accurately place the stanchion at the work site and to control the angle and direction in which the hammer blows are to be delivered. Air is introduced into the fluid return line from the dump valve for cushioning fluid flow.
An improved portable hydraulically powered driving machine, for driving posts, ground anchors, concrete breakers, core drills, and the like work pieces into the ground, pavements or wall structure, has a tower in the form of a stanchion carried by an extensible pedestal mounted boom rig on a mobile base such as a conventional truck and in its working position is adapted to rest on the ground, pavement or wall structure at a controlled attitude relative thereto to guide a hydraulically powered hammer and hold an anvil against the work piece and, in its transporting position is adapted to be secured horizontally at a low level in a truck-mounted frame. The stanchion down-crowds the hammer guide to load a compression spring which maintains the anvil continuously against the work piece even after the impact force of the hammer blow is expended and the work piece advances a considerable distance. The hammer is also spring-loaded, a hydraulic jack lifts the hammer and stretches the spring and the stroke of the hammer together with the rapidity of the hammer blows is controlled by a rotating dump valve for the jack. The speed of rotation of the dump valve is controlled by the machine operator with faster speeds decreasing the stroke of the hammer and increasing the number of blows delivered per minute.
Hydraulic controls are provided to accurately place the stanchion at the work site and to control the angle and direction in which the hammer blows are to be delivered. Air is introduced into the fluid return line from the dump valve for cushioning fluid flow.
Description
~n~4ir~5 SPECIFICATION
.
This invention improves the post driving maahine of my Canadian patent application Serial No. 250,522 filed April 20, 1976, by providing a stanchion type tower supporting and guiding a down-crowded carriage for the hydraulic hammer which is easily mounted on and removed from a boom structure carried from a truck. The boom structure preferably includes a pedestal mounted upright on the frame of a one-ton open-top box body truck near the center of the box. A telescoped ex-tensible boom assembly is carried at the top of the pedestal ~ ,.:;, and is rotatable through a full 360 degrees. The stanchion is detachably mounted on the free end of the boom by easily accessible fasteners. The pedestal also mounts a control station with an operator's seat that rotates with the boom.
`i Hydraulic jacks or motors, raise, lower and swing the boom and tilt the stanchion in all directions relative to the boom. -The truck has an upstanding frame mounted behind the cab sup- ~
porting the boom and stanchion at a low level travel position -`-and the truck frame rotatably supports a rigid transverse tube or bar with arms shackled to the rear axle springs of the , truck to maintain the frame level with the ground under load from the boom thereby avoiding the necessity for outriggers.
The operator's station is equipped with a sighting device showing the deviation of the stanchion from a vertical upright - -~
, , - .
position. The stanchion carries a hammer guide or carriage suspending a spring-supporting anvil and the carriage is hy- ~i draulically raised and lowered along the length of the stan- `
... .
chion to position the anvil for resting on top of the work piece and to compress the anvil spring to maintain the ;
anvil continuously in contact with the work piece. The hammer is propelled by a tension spring and an upright hy-draulic jack raises the hammer and stretches the spring to 1 1- ~ ''.. ~
, ~ .
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control the length of the hammer stroke. Fluid from the - -hydraulic jack is dumped by a rotating valve, the speed of which is accurately controlled from the operator's station to regulate the length and rate of the stroke of the hammer. On its hammer-lifting and spring-stretching cycle the hydraulic jack compresses air in the` jack cylinder above the piston to flow out of the top of the jack into the conduit returning hydraulic fluid dumped from the rotating valve to the tank so that upon dumping of the fluid from the valve the air will cushion the surge of fluid and minimize shock loads on the return conduit. A safety hydraulic circuit is also provided to prevent operation of the lifting jack until the anvil spring is compressed.
It is then an o~ject of this invention to improve the post driving machine of my aforesaid Canadian patent application Serial No. 250,522 filed April 20, 1976, by pro-viding a stanchion post on a derrick rig with means on the rig pressing the post against the work site to be acted upon by the hammer tool.
The invention provides a slidable carriage on the stanchion post which is pressed against the work site, and this carriage mounts a hammer tool with a spring loaded sus- ~;-pended anvil struck by the hammer of the tool. The hammer tool is down crowded to compress the spring of the spring-loaded anvil causing the anvil to follow the work piece and minimize recoil of the hammer tool. Hydraulic means are pro-vided for raising and lowering the carriage on the stanchion, hydraulic means are provided for powering the hammer to impact against the work piece and hydraulic mechanism is provided to manipulate the derrick or rig assembly to position the driving tool at a selected work site.
~4, ~ - 2 -~, ~
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,. . .
A speed sensitive dump valve controls the stroke and rate of the hammer blows, and this valve is manually controlled or adjusted to vary the stroke and rate.
The hydraulic mechanism for driving the hammer ;;
stretches tension springs which will propel the hammer against the anvil. This hydraulic mechanism compresses air on the hammer lifting stroke which is vented to the discharge side of the speed sensitive dump valve to cushion the discharge.
The stanchion post is hollow and has an extension foot replacably and adjustably mounted on the lower end of the post for engaging the surface of the work site.
A work piece guide can be removably mounted on the lower end of the stanchion post to slidably guide the work piece.
The end of the derrick assembly suspending the driving tool has a cap with means to rotate and tilt the driving tool relative to the derrick assembly.
.~ .:. - .
The following detailed descriptions of the embodiments of the invention shown on the annexed sheets of _.. ....... .
drawings will make readily apparent to those skilled in the -art other and further objects and features of the invention.
ON THE DRAWINGS
.. .... .
Fig. 1 is a side elevational view of a truck-mounted post driving machine according to this invention showing the J..~
.'~ ' ' .
.
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opcrating posi~-ion in solid lines and the low level travcl position in ~otted lines.
Fig. 2 is a fragmentary transverse elevational view of the control station of ~he machine taken generally along the line II-II of Fig. 1.
Fig. 3 is a fragmentary longitudinal view of the control s~ation taken generally along the line III-III of Fig. 2.
Fig. 4 is a transverse sectional view, with parts and elevation, taken along the line IV-IV of Fig. 1.
Fig. S is a fragmentary side elevational view of the free end of the boom of the machine of Pig. 1 and the post driving tool detachably mounted thereon.
Figure S-A is a fragmentary cross-sectional view generally along the line VA-VA of Fig. S but displaced from this ~-;
line to extend through the roller axes.
Pig. 5-B is a fragmentary horizontal cross-sectional ~ -view along the line VB-VB of Fig. S.
Fig. 6 is a transverse sectional view along the line VI-VI of Fig. 5.
Fig. 7 is a fragmentary rear elevational view of the post driving tool attachment of Pig. 5.
Pig. 8 is a top plan view with parts in horizontal section taken generally along the line VIII-VIII of Pig. 5.
Pig. 9 is a fragmentary longitudinal sectional view with ~ -parts in elevation taken along the line IX-IX of Pig. 7, Pig. 10 is a horizontal section.ll view taken generally alon~ the line X-X of Fig. 1 witll parts broken away ~o show 4 _ - -, '~
1~4~475 underlying structure.
Fig. 11 is a vertical sectional view takcn generally along the line XI-XI of Fig. 10.
Fig. 12 is a vertical sectional view, with parts in elevation, of a tilt switch attached to the stanchion and taken generally along the lines XII-XII of Fig. 1.
Fig. 13 is a top plan view of the tilt switch of Pig. 12 with parts in transverse section and a wiring diagram illustrating the manner in which the switch is connected to a sighting device at the operator's station. : -Fig. 14 is a fragmentary side elevational view of the lower end of the stanchion carrying a removable foot plate and post guide Fig. 15 is a horizontal sectional view, with parts in top plan, taken along the lines of XV-XV of Fig. 14.
Fig. 16 is a fragmentary elevational view of the lower end of the stanchion on which a foot plate with an elongated leg portion is mounted to increase the height of the stanchion when resting on the ground.
Pig. 17 is a transverse cross-sectional view taken along the lines XVII-XVII of Fig. 8.
Fig. 18 is a top plan view of the stanchion showing the motor drive for down-crowding.
~ig, 19 i9 a side elevation along the line XIX-XIX of Pig. 18.
Pig. 20 is a diagrammatic view of the hydraulic control ~ystem for the machine.
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As ~hown in I;ig, 1, the driving machinc ]0 includcs a standard au~omotive vehicle, such as an open box trucl~ 11, a hydraulic derrick asscmbly 12 mounted on the truck 11, and a driving tool assembly 1~ detachably mounted on the free end of an S extensible boom of the derrick assembly 12.
The tool assembly 13 includes a stanchion type tower 14, a carxiage 15 slidably mounted on the stancllion 14, a hamrner housing and anvil support 16 mounted on the carriage 15 rearwardly of the stanchion 14, a hydraulic hammer lift mechanism 17, carried by the housing 16, and a hydraulic control system 18 operated from a station that rotates with the derrick assembly 12.
As illustrated in Fig. 1, the vehicle 11 is a convention-al three-quarter or one-ton open-box truck with a driver's cab 19 at the front thereof and an open-top box body 20 at the rear thereof over the rear wheels 21. An upright inverted U-shaped frame 22 is mounted on the truck 11 behind the cab 19 and as shown in Fig.
4 has an open-top support 23 for the boom of the derrick assembly 12 and a depending strap receptacle 24 for the stanchion 14 of the tool assembly 13. The support 23 and strap 24 are mounted on the top bight portion of the U-shaped frame 22 midway between the side legs of the frame and as shown in Fig. 1, the frame 22 pro-jects above the ca~ 19 just far enough so that the tool 13 will leave the windshield of the cab 19 unobstructed when the derrick 12 and tool 13 are in their stored travel position shown in dotted line~ in Fi~ 1 with the stanchion suspended in the strap 24, As shown in Figs. 1, 10, and 11, the truclc 11 has a frame 25 frorn which a rear a~le 26 for the rear wheels 21 is 10~447S
suspendcd by lcaf spring.s 27. A cross framc brace 2.~a mounts sleeve bea~ings 28 adjacent the longitudinal frame beams 25b and a stiiY torque resisting tube 29 is rotatably n ounted adjacent its ends in thesc bearings 28. If desired a single tubular bearing 28 S could span the length of the cross frame 25a to rotatably mount the tube 29 along its own entire length to prevent buckling of the tube under torsion loads. The ends of the tube 29 have rearward-ly extending stabilizer arms 30 fixedly secured thereto and the rear ends of these arms 30 are connected thl^ough pivoted links 31 with spring shackle bolts 32 embracing the axle 26 and straddling the springs 27 at their mid points.
This arrangement of the tube 29, stabilizer arms 30 and links 31 accommodates flexing of the springs 27 to provide the spring suspension for the vehicle frame 25, but prevents the springs on one side of the trucl~ from being flattened under load more than the springs on the other side of the truck, thereby stabilizing the truck frame against transverse tilting under load.
This stabilizer arrangement avoids the necessity for outriggers on the truck 11 since the frame of the truck 25 cannot tilt laterally under the load of the derrick 12 and tool 13 and a stable platform for the derrick 12 is insured, As shown in Fig. 1, the derrick 12 has a pedes~al mounting 33 supported from the truck frame 25 on a base plate 34, A hole is cut through the box body 20 so that the base plate 34 may be boltcd directly to the frame 25 and the pedestal 33 permitted to projcct into thc body 20 at about the mid point thereof over the rear wheels 21. An upright inner mast or Spilldle 35 plOj~CtS from th~ pedestal base 33 and rotatably mount:3 an outer mast or sleeve 36 which is rotated by hyc~aulic motor 37 tbrough a worm and ring gear drive 38.
The operator's station 18 is mounted on one side of the outer mast or sleeve 36 and the upper end of the mast supports the inner end of a lower boom 39 on a horizontal pivot 40. This lower boom 39 is raised and lowered cabout the pivot 40 by a hydraulic jack 41 supported from the base of the mast 36. The lower boom 39 is hollow and telescopically mounts an upper boom -42 which is propelled into and out of the boom 39 by a hydraulic jack 43.
The mast sleeve 36 mounts the derrick booms 39 and 42 for a full 360 degree rotation around the mast 3~ of the pede-stal mounting 33 and the operator's station 18 rotates therewith so -that the operator is always facing the tool 13 mounted on the free end of the boom 42. The lower boom 39 is swingable on its pivot base 40 from a substantially vertical high~ position to a lower than horizontal position as shown in Fig. 1 and the hydraulic jack 41 is effective to load the boom assembly downwardly for pressing the stanchion 14 of the tool 13 tightly against the ground.
To swing the tool 13 from its ground supported upright position rearwardly o~ the truck shown in Fig. 1 to any other operating position, the boom 39 is merely lifted to raise the stanchion 14 of~ the ground and rotated to the desired work site which could be on either side of the truck or even above the truck.
To move the derrick 12 and the tool 13 to the low-lcvel storage po~ition for travel, ~8 shown in dotted lines in l-~'ig. l";he tool is lQ4 ~475 tiltcd back unde~ the boom 39 and m~nipulated to move thc stanchion 14 in~o the strap 24 whereupon the boom 39 may then be lowered in~o the support 23.
As sbown in Fig. S, the tool 13 is detachably mounted on the end of the upper boom 42 by a cap unit 44 fitting over the.
free end of the upper boom 42 and secured thereto by bolts 45.
This cap 44 as also shown in Figs. 6 and 8, has a fixed ring .
gear 46 around which is meshed a sprocket chain 47 which is also trained around the driven gear 48 of a hydraulic motor 49 which is mounted on a head SO that is rotatable around a spindle 51 extending from the cap 44 as shown in ~ig. 6. The arrangement is such that the chain 47 is held stationary by the cap 44 and ~ .
when the gear 48 is driven, the motor pulls the head SO around ..
the spindle 51.
The rear end of the head 50 is pivoted by a pin 52 to a rearwardly projecting rib 53 of the stanchion 14. Four bolts 45 positioned in diametrically opposite pairs are sufficient to secure the cap 44 to the boom 42 and are easily accessible for removal to detach the tool 13 from the boom 42.
A hydraulic jack 54 is pivotally mounted on the head 50 and as shown in Fig. 1, has its piston rod ~5 pivoted to a bracket 56 pqojecting from the front side of the stanchion 14 adjacent the `
upper end of the stanchion. This jack 54 is effective to tilt the stanchion forwardly and rearwardly while the hydraulic motor 49 ~ ;~
is effective to rotate the stanchion on l:he end of the boom 42.
In this manner the attitude of the stancl~ion 14 relative to the ground or other ~urface to be impacted is accurately con~roll~d. :-.. ~
~s shown in Figs. 6, 8 and 17, the head 50 support~
a second hydraulic inotor 57 driving reducing gears (not shown) in a gear box 58 having an output shaft 59 which, as shown in Fig.
17, is coupled tO a shaft 60 of a ball valve 61. The ball valve 61 S has a housin~ with an inlet 62 and an outlet 63 together with a ball chamber between the inlet and outlet forming a socket for a ball 64 rotated by the shaft 60. The ball 64 has a bore 64a there-through joining the inlet 62 with the outlet 63. When the ball valve 64 is rotated 90 degrees from the position shown in Fig. 17, it closes communication between the inlet and outlet. The arrangement is such that when the ball 64 is rotated a full revolu-tion, the valve 61 will perform two opening and two closing cycles.
The speed of xotation of the ball 64 thus controls the rate of the opening and closing cycles.
As shown in Figs. 8, 9, 14 and lS, the stanchion 14 is a hollow square post 65 with a rear corner facing lhe carriage 15 and a front corner facing the head SQ
As shown in Figs. 1, 18, 19 and 20 the top end of this post 65 rotatably supports a sprocket 66 driven by a chain 67 from a hydraulic motor 68 mounted on the bracket 56 which ~ -projects from the rear corner of the post 6S.
As æhown in Figs. 1, 5, 9 and 20, the stanchion post 65 also rotatably mounts a sprocket 69 near the bottom end -thereof on bearing blocks 70 that are vertically adjustable by a screw adjustment 71. The sp~ocket 69 is aligned with the ~:op sprocket 66 and extends through a wlndow cut through the rear corner of the stanchion post 65.
- 10 - ' 1~49~Y~
~ sprocket chain 72 is trained around the sprock~ts 66 and 69 and has an inner run 72a extending through the hollow stanchion post 65 (Fig. 18) and an outer run 72b outside of the stanchion post over the rear corner thereof.
The bot~om of the post 65, as shown in Figs. 9, 14 and 15 has an enlarged foot plate 73 mounted thereon to rest on the grouncl G. This foot plate 73 has an upstanding square tube 74 centered thereon and slidably ~ltting the post 65.
A removable pin 75 extends through aligned holes in the post 65 and tube 74 to secure the foot plate to the bottom of the post.
As shown in Fig. 16, the effective length of the post 65 is increased by removing the foot plate tube 74 from the bottom end of the post 65 and replacing it with an extension tube 76 that fits over the bottom end of the post 6S and is secured thereto by the same pin 75 used for the tube 74. This extension post 76 has a foot plate 77 on the bottom end thereof adapted to rest on the ground G so that when the tool 13 is to be used for driving long posts or other work piece~ into the ground, it can be extended to any desired height by use of variable lengths of extension of tubes 76. '~
The carriage 15, as shown in Figs. 5, 8 and 9 has a ~ -square hollow tube 78 slidably mounted on the post 65 with a slot or cleft gap 78a (~ig. 8) in its front corner accommodating free passage of the rib 53 therethrough. This tubular base 78 is only a fraction of the length of the post 65 BO as to have an extended travel length from the bottom to the top of the post 65.
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A~ shown in Figs. 5 and 9, ~-he outer run 72b of the chain 72 is anchorcd to brackets 79 at the top and bottom cnds of the carxiage tube 78, The chain thus drives the tubular basc 78 of the carriage along the length of the tubular post 65.
An upstanding sleeve 80 is carried by the carriage base tube 78 from a rib 81 secured on the rear corner of the base 78 and from welded-on bracket plates 8~ at the top and bottom ends of this rib 81, as shown in Figs. 5 and 9. The sleeve 80 is formed in two longitudinal halves bolted together by bolts 83 extending through mating flanges provided on these halves. The arrangement is such that the outer half can be removed from the inner half of the sleeve 80 to permit installation of the hammer -housing as hereinafter describea As shown in Figs. 5 and 7 to 9, the hammer housing and anvil support 16 include a tubular barrel 84 extending through the tubular bracket sleeve 80 and fixedly clamped therein so as to ~-parallel the stanchion post 65 and travel with the carriage base 78.
As shown in Figs. 5, S-A and 9 to further lock the barrel 84 to the base 78 and prevent sliding of the barrel in the sleeve 80, the bracket 79 at the bottom end of the carriage tube 78 extends between two lugs 84b welded on the barrel 84 and a removable pin P extends through mating holes in the lugs and bracket. The pin ~ -P is removed when the outer half of the bracket sleeve 80 is removed so that the barrel may be removed from the carriage.
The top end of the barrel 84 projects above the tubular ~ ~ -bracket 80 and has four angle iron legs 85 extending upwardly --therefrorn to a cap 86 with a rubber bumper 87 on its lower face, -~
~4~475 The bottom of the barrel 84 projects below the tubular mounting slceve 80 and has an out-turned flnnge 88 spaced from its open bottom end. A sleeve 89 is slidably mounted in this open bottom end of the barrel 84 and has an anvil head 90 (Fig. 9) secured in its upper end thereof. The bottom of the sleeve has an out-turned flange 91 and rods or straps 92 suspended from the flange 88 of the barrel fft freely through lloles in the flange 91.
Pins or nuts 93 on the bottom ends of these straps or rods receive the flange 91 thereagainst to maintain the sleeve 89 in the barrel 84. A compression coil spring 94 surrounds the bottom end of the barrel 84 and has its ends abutting the flanges 88 and 91.
Three or fou~ rods or straps 92 spaced equally around the barrel 84 are sufficient to slidably suspend the sleeve 89 from the barrel.
As shown in Fig. 9, a work piece W. P. extends into the sleeve 89 with the anvil head 90 resting on the top thereof~
When, as hereinafter described, the carriage 15 is down-powered -to move the barrel 84 for pressing the anvil head 90 against the work piece W. P., the spring 94 will be compressed and will be effective to maintain the anvil head 90 constantly against the work piece, -The barrel 84 as shown in ~igs. 5, 5-A, 7 and 8 rotatably supports two sets of four rollers 9S arranged symmetri- -cally around the barrel with the first set being at a level adjacent the top of the barrel and the second set being at a lower level but above the bottom of the baxrel. Each roller 95 is rotatable about an axis tran~versely of the barrel and projects through a slot 96 (Pig. 5-~) in the barrel 84 so that it will pqesent a rolling face ~4g~S
interiorly of the b~rrel. Thc rollers 95 are supportcd on axlcs carried by ears 97 projecting from the barrel on each side of each xoller.
A heavy hammer 98 of circular cross section and substantial length fits freely in the barrel 84 and rides on the rollers 95 as best shown in Figs. 5-A and 9. The hammer 98 preferably has a reduced diameter hardened leading end 99 for impacting against the anvil 90. The stroke of the hammer in the barrel 84 is between this anvil 90 and the top bumper 87 depending from the cap 86 supported in spaced relation from the top of the barrel 84 by the angle iron legs 85. The relative lengths of the barrel 84 and hammer 98 are such that the top end of the hammer 98 will always pro3ect above the top of the barrel 84.
The hammer lift assembly 17 as shown in Pigs. 5, 7 and 9 includes an upright hydraulic jack 100 having the lower end of its cylinder supp~rted on a bracket 101 mounted on the barrel 84 and having its piston rod 102 extended through a pin 103 pro- -jecting xearwardly from the top end of ~he hammer 98. The ' piston rod 102 has rubber grommets 104 therearound on opposlte sides of the pin 103 and nuts 105 threaded on the rod 102 clamp -these grommets relative to the top and bottom sides of the pin 103.
- A second pin 106 extends laterally through the top end ~ ;
of the hammer 98 and tension springs 107 are suspended from the ends of this pin 106, straddling the support sleeve 80 and barrel 84 and pinned at their lower ends to links 108 which in turn are pivotally mounted on laterally exl:ending supports 109 welded to the barrel flange 88.
'' `' -''' ' iO4~47'S
To provide a rest position for thc hammer causing it to follow the carriage as it is raised and lowcred, bumpers 110 of resilient material are mounted on support:s 111 carried on a top flange 84a OI the barrel 84 to receive the pin 106 the~eagaint.
S The springs 107 hold the pin 106 against the bumpers 110 in the idle position of the hammer but in the operating position the carriage down-crowds the anvil head 90 against the work piece to compress the spring 94 so that the hammer 98 will strike the anvil head before the pin 106 reaches the bumpers 110. The pin 106, of course, extends fxeely between the legs 85 carried by tlle barrel 84.
As shown in ~ig. 7, the lift jack 100 has the piston rod 102 extending into the jack cylinder to a piston head 112 and -pressured fluid from a feed pipe 113 is fed into the cylinder under the piston 112 and is relieved from the cylinder through a dis- ~ -charge pipe 114. In addition an air conduit 115 is provided at the upper end of the cylinder 100 to receive air from the cylinder above the piston 112 as the piston is raised in the cylinder.
Thus, when fluid is forced into the cylinder below the pisl:on 112, air will be forced into the air line 115. Conversely, when fluid is dumped from the cylinder under the piston 112, the stretched springs 107 will impel the hammer to deliver its blow against the anvil head 90 and at the same time air will be sucked from the air line 115 into the cylinder above the piston 112.
If desired, the hammer housing and anvil support 16 and the h~draulic mechanism 17 can be replaced with a self~con-tain~d driv~ tool ~uch as a standard air, hydraulic, elec~ric or gas-driven hammcr or breaker tool. To this end, thc sleeve 80 is opened up hy removal of the bolts 83 and the pin P is removed permitting l-emoval of the barrel 84 and the barrel carried com-ponents. Then, for example, the barrel or housing of a standard S air hammer or breaker tool can be clamped in the sleeve 80 and pinned to the carriage base 78. The barrel or housing oP the standard air hammer ~ool suspends the spring-loaded anvil sleeve 89 so that the anvil 90 will be impacted by the hammer or other driven impact members in the driver tool. The power for driving this type of tool can be supplied from any suitable source such as an air compressor which may be mounted on the vehicle 11. The carriage 15 can be down-crowded to lower the anvil head against the work piece or against a tool such as a breaker chisel to be --~
driven by the hammer.
The compressing of the spring 94 by the weight OI the driver tool and the down-crowding load applied thereto fr~m the carriage 15 will, as explained above, not only maintain the anvil head against the work piece or breaker, but will continue to load the work piece or tool and avoid the "pogo stick" recoil encountered with hand manipulated air hammers or jacks. The stanchion post ~ -65 will, of course, rest on the surface being impacted by the ~:ork piece or breaker tool and will be positioned at a controlled attitude relative to this surface for guiding the direction of the driving of the work piece or tool.
.. .. . .
As shown in Fig. 20, a supply tank 116 feeds hydraulic fluid to a main pump 117 driven by an auxiliary engine E. This engine and the tank 116 are supported on the outer mast 36 of the 1~447~
pedestal mountin~ for tl~e derrick a~sembly 12 as shown in I~ig. 1.
A second hydraulic pump 118 is also clriven by the engine E. The pump 117 has a large capacity of about 26 gallons per minu~e and is used exclusively for the hydraullc lift mechanism 17. The pump 118 may have a smaller capacity of about 7 gallons per minute and serves the hydraulic derrick assembly 12, the tilting and rotating hydraulic controls for the stanchion 14 and the carxiage mechanism 15. :
A supply conduit 119 from the pump 118 feeds the manifold of a valve bank 120 containing six valves 120a through 120f, each con~rolled by a separate hand lever 121 from the operator's station 18 which as described above in connection with - ' the derrick system 12, is mounted on the outer mast or sleeve 36.
This operator station 18 includes an operator's seat 122 shown in Fig. 1 and a console 123 shown in ~igs. 2 and 3 in front of the seat 122. As shown, two of the hand levers 121 have depending arms 124 connected by links 125 to cranks 126 independently rotatable on a console carried cross shaft 127. Each crank 126 is connected through two links 128 to two foot pedals 129 and 130.
One pedal is depressed to lift a link 128 while the other pedal is depressed to lower a link 128 thereby rocking each crank 126 in opposite directions to pull and push the valve levers 121. The arrangement is such that the levers 121 having these foot pedal ,f;
connections can be manipulated by the feet of the operator leaving his hands free to manipulate the other control levers 121.
As shown in Fig. 20 the valve 120a supplies prc~suri~ed fluid through a conduit 131 to the hydraulic motor 68 10'~4g7S
which drivcs the sprocket 66 and cl-ain 72 for controlling thc down-loading of thc c~rriage ~ssembly 15. Fluid from the motor 68 is discharged back to the valve through the conduit 132 on this down-load cycle. The valve 120a car. be reversed to feed fluid through the conduit 132 for reversing the motor 68 to raise the carriage assembly. A bleeder valve 133 at the operator's station 18 is manually controlled to bleed pressurized ~luid from the conduit 131 back to the tank 116 for accurately controlling the downward load-ing of the carriage assembly 15.
The valve 120b controls flow of fluid through conduits 134 and 135 to the hydraulic motor 49 for controlling the direction of rotation of the motor drive sprocket 48 thereby controlling the direction of rotation of the head 50 on the end of the boom 42.
The valve 120c controls flow of fluid through conduits --136 and 137 to the hydraùlic jack 43 for driving the boom ~2 in both directions into and out of the boom 39 thereby co~trolling the effective length of the derrick assembly 12.
The valve 120d controls fluid through conduits 138 and - ~ -139 to drive the motor 37 in opposite directions ther~y controlling - -the direction of rotation of the outer sleeve or mast 36 and thus - ~ --controlling the direction of the derrick booms 39 and 42 relative to the vehicle 11. ~ -The valve 120e controls fluid flow through the conduits 140 and 141 to control the jack 54 for tilting the stanchion ~ower 14 about the pivot 52.
The Yalve 120f controls t-ydraulic flow through conduits 142 and 143 to actuate the boom li~ing jack 41 in both dircction~
4'~5 including a down-loading of the boom.
~rom the above descriptions, it will be understood that the pump 118 supplies the hydraulic fluid through the valve bank 120 for supplying hydraulic power to all of the hydraulic compon-S ents with the exception of the hammer lift mechanism ]7. This pump 118 is driven whenever the auxiliary engine E is operated in order that hydraulic power will be available to manipulate the derrick 12, and the devices for positioning the tool assembly 13 relative to the derrick assembly. On the other hand, the high-flow capacity pump 117 is only driven when the hammer is in operation and therefore a clutch 144 is provided between the engine 1~ and the pump 117. This clutch can take the form of a loose belt pulley drive where the belt is tightened whenever it is desired to drive the pump 117.
The pump 117 supplies hydraulic fluid under pressure through the conduit 113 feeding the bottom end of the hydraulic lift jack 100 as explained hereinabove. This fluid is then returned through the discharge conduit 114 under the controi of the dump ~, valve 61 described above.
A by-pass valve 145 is provided in the conduit 113 ahead of the lift jack 100 to by-pass fluid back tO the tank 116 through a return conduit 146. The valve 145 is controlled by the spring loaded anvil 89 by a link 147 attached to the flange 91 of the anvil sleeve 89 so that fluid is by-passed from the feed conduit 2S 113 to the return conduit 146 until the anvil is loaded againsl: a work piece W. P, by down-crowding the carriage assembly 15 to compress the anvil spring 94 and thus hold the anvil head . .
.
10449~5 constanEly against the work piece as described hereinal)ove, ~y-passed fluid in ~he return conduit 146 flows through a check valve 147 into the return conduit 114 back to the tank 116. The check valve 147 is downstream from the dump valve 61.
S Air flow into and ou~ of the top end of the lift jack 100 above the piston, as explained above, is accommodated through the air line 115 which, as shown in Fig. 17, communicates with the return conduit 146 which extends to a check valve 148 on the top of the tank 116. The check valve 148 opens to admit air from the tank into the top of the jack 100 on the downstroke of the jack but locks air in:the conduit 146 on the upstroke of the jack, thereby forcing this air through the check valve 147 into the return conduit 114. The tank 116 is thus maintained under an elevated pressure and the conduit 114 will be loaded with air downstream -1~ from the dump valve 61 so that when this valve is open, the ~ -dumped fluid from the bottom of the lift jack 100 will discharge ~, ,.,...~ ..
against an air cushion to lessen surging and shock loads on the -~`
fluid conduits. The air cushioning effect is obtained without any added component since it is developed by the same hydraulic jack 100 that is used to lift the hammer 98 and stretch the springs 107.
In order to facilitate accurate control of the attitude of the stanchion tower 14 from the operator's station at the console 123, as shown in ~igs. 2 and 17, a sighting device 149 is mounted on the console of the operator's station and this device cooperates with a tilt switch 150 mounted on the front end edge of the stanchion post 65. ~ -' '~' ' . .. '' - 20 ~ ~
1~4~4~S
As sl~own in Figs. 12 and 13, this til~ switch 150 has a plastic casing lSl with a domed top from which is suspended a heavy metal ball 152 by means of a metal fle~ le wire or cable 153.
The side wall of the casing 151 carries four electrical contacts 154 surrounding the ball 1$2 with each contact being connected through a wire 155 with a light bulb 156 in the sighting device 149. Electrical energy from a suitable source such as a battery B supplies current to the ball 152 through a wire 157 and the cable 153. When the ball 152 swings to engage a contact 154, current flows through the wire 155 of this contact to the filament in the corresponding bulb 156 and then flows from the filament back through a wire 158 to the battery B.
One pair of contacts 154 is aligned transversely of the lS stanchion post 65 to be engaged by the ball when the post is tilted laterally. The direction of tilt is that indicated by one of the laterally arranged light bulbs 156. The other set of contacts 154 is aligned so as to be engaged by the ball 152 when the stanchion post 65 is tilted forwardl~- or rearwardly and these contacts in turn energize the top and bottom light bulbs 156 in the sighting device 149. Thus, the operator has an immediate reading of the lateral or longitudinal tilt of the stanchion and can easily manipu- ~
late the valve 120b to actuate the hydraulic motor 49 for correct- -ing lateral tilt or the valve 120e to actuate the jack 54 for ~ ~
controlling front and rear tilt of the stanchion post. ~ -As shown in Figs. 14 and 15, the stanchion post 65 carrie~ a removable collar 159 beyond the rear edge ~hereof to ~ 21 -S
rcceive the work piece W, P. This collar is sl~pported from a rearwardly projecting cye socket 160 projccting rearwardly from the rear corner of the post 65 and similar eye sockets 161 on the side walls of the post laterally of the socket 160 but at a lower level. The work piece post guide collar 159 has a cylindrical bore of sufficiently large diameter to accept removable bushings 162 witll variably sized internal diameters and shapes for slidably receiving work pieces of different sizes and shapes. The collar has a top leg 163 adapted to overlie the socket 160 and side legs 164 adapted to overlie the sockets 161. The ends of these legs 163 and 164 are apertured to accept connector pins 165 which extend through the sockets and mount the guide collar 159 in a horizontal plane rearwardly from the lower end of the staltchion post 65.
The guide collar 159 is thus easily mounted on and removed i~om the stanchion post 65 and can accept bushings of different internal diameters and sizes to slidably guide work pieces adjacent the ground level. With the upper end of the work piece also mounted in the anvil sleeve 89, the work piece is thus held parallel with the stanchion post 65. -Fxom the above descriptions it will be understood that the driving machine 10 of this invention, being mounted on a mobile vehicle 11 can be driven to the work site with the derrick 12 and driving tool 13 at a low-level carry position shown in dotted lines ; -in Fig. 1. In this low-lcvel position, the boom 42 is firmly seated in the support 23 of the frame 22 and the iree end of the stancl]ion 14 i~ Ruspended in the s~rap 24. At the work site the derrick boom 42 is cxtendcd from the boom 43 to retract the stanchion 1~ from thc strap 24 and the dcrrick is ~hen raised and swung to position thc stanchion 14 at the exact spot where thc work piece is to be driven.
It is pre~erred to down-load the derrick to hold the foot plate 73 of the stanchion post 65 tightly against the ground, wall or other surface to receive the work piece. The attitude of the stanchion relative to the ground is then carefully adjusted so that the work piece will be driven in the exact desired direction. Next, the carriage assembly 15 is raised on the stanchion post 65 so that the upper end of the work piece can be inserted in the anvil sleeve 89 with the anvil head 90 resting on top of the work piece.
The carxiage is then powered downwardly on the stanchion post 65 to compress the coil spring 94 of the anvil thereby closingthe by-pass valve 145. Hydraulic fluid then flows into the lower end of the lifting jack 100 to raise the hammer 98 on its guide barrel 84.
The dump valve 61 is driven by the electric motor 57 at an exact speed controlled by the operator from a rheostat R or the like current regulator mounted on the console 123. The motor 57 could also be hydraulically driven with a bleeder control such as the control 133 for the motor 68. When the valve is closed, fluid will flow under the piston in the lifting jack 100 to raise the hammer and this lifting action will continue until the valve is opened to dump the hydraulic fluid. The speed of rotation of the - -dump valve thus controis the height to which the hammer is lifted and cooperates with the speed of the pump 117 to create a desired i ~
impact rate for the h~mmer. ~ -- 23 - ~
l~J~7S
On thc li~ing strokc, the hammer stre~:ches the springs 107 and then when the dump valve 61 is op~ned thc liting forcc OIl the hydraulic lifting cylinder 100 is released permitting the springs and gravity to propel the hammer against the anvil Iléad 90 to deliver its clriving blow to the work piece W. P.
During the lifting c~rcle, air above the piston in the lifr- .
ing cylinder 100 is compressed into the hycll-aulic fluid return con- .....
duit downstream from the dump valve 61 so that on the next succeeding dumping of the fluid, an air cushion will be provided to minim shock loads in the conduit.
After the hammer delivers its impact blow against the anvil to drive the work piece into the ground, the hydraulic load on the carriage 15 is maintained at a sufficient level so that the carriage will be down-crowded to follow the work piece and cause :
the anvil head 90 to remain in contact therewith Any lag in this down-crowding follow-up will be accommodated by the compression spring 94 which can elongate from its compressed condition to maintain the anvil head aga.inst the work piece during the follow-up movement of the carriage. The down-crowding load is controlled .
by the bleeder valve 133. ~; -.
The vehi~le 11 stabilized against a lateral tilt as when the derrick operates the driving tool laterally of the vehicle body without resortmg to the use of outriggers, by the stabilizer arms 30 secured to the ends of the rigid rotating tube 29 carried by the vehicle frame. These stabilizer arms prevent flattening of the vehicle springs 27 on one side of the vehi.cle more tharI on the other side but operate in unison to accommodate spring suspen~ion
.
This invention improves the post driving maahine of my Canadian patent application Serial No. 250,522 filed April 20, 1976, by providing a stanchion type tower supporting and guiding a down-crowded carriage for the hydraulic hammer which is easily mounted on and removed from a boom structure carried from a truck. The boom structure preferably includes a pedestal mounted upright on the frame of a one-ton open-top box body truck near the center of the box. A telescoped ex-tensible boom assembly is carried at the top of the pedestal ~ ,.:;, and is rotatable through a full 360 degrees. The stanchion is detachably mounted on the free end of the boom by easily accessible fasteners. The pedestal also mounts a control station with an operator's seat that rotates with the boom.
`i Hydraulic jacks or motors, raise, lower and swing the boom and tilt the stanchion in all directions relative to the boom. -The truck has an upstanding frame mounted behind the cab sup- ~
porting the boom and stanchion at a low level travel position -`-and the truck frame rotatably supports a rigid transverse tube or bar with arms shackled to the rear axle springs of the , truck to maintain the frame level with the ground under load from the boom thereby avoiding the necessity for outriggers.
The operator's station is equipped with a sighting device showing the deviation of the stanchion from a vertical upright - -~
, , - .
position. The stanchion carries a hammer guide or carriage suspending a spring-supporting anvil and the carriage is hy- ~i draulically raised and lowered along the length of the stan- `
... .
chion to position the anvil for resting on top of the work piece and to compress the anvil spring to maintain the ;
anvil continuously in contact with the work piece. The hammer is propelled by a tension spring and an upright hy-draulic jack raises the hammer and stretches the spring to 1 1- ~ ''.. ~
, ~ .
';'S
control the length of the hammer stroke. Fluid from the - -hydraulic jack is dumped by a rotating valve, the speed of which is accurately controlled from the operator's station to regulate the length and rate of the stroke of the hammer. On its hammer-lifting and spring-stretching cycle the hydraulic jack compresses air in the` jack cylinder above the piston to flow out of the top of the jack into the conduit returning hydraulic fluid dumped from the rotating valve to the tank so that upon dumping of the fluid from the valve the air will cushion the surge of fluid and minimize shock loads on the return conduit. A safety hydraulic circuit is also provided to prevent operation of the lifting jack until the anvil spring is compressed.
It is then an o~ject of this invention to improve the post driving machine of my aforesaid Canadian patent application Serial No. 250,522 filed April 20, 1976, by pro-viding a stanchion post on a derrick rig with means on the rig pressing the post against the work site to be acted upon by the hammer tool.
The invention provides a slidable carriage on the stanchion post which is pressed against the work site, and this carriage mounts a hammer tool with a spring loaded sus- ~;-pended anvil struck by the hammer of the tool. The hammer tool is down crowded to compress the spring of the spring-loaded anvil causing the anvil to follow the work piece and minimize recoil of the hammer tool. Hydraulic means are pro-vided for raising and lowering the carriage on the stanchion, hydraulic means are provided for powering the hammer to impact against the work piece and hydraulic mechanism is provided to manipulate the derrick or rig assembly to position the driving tool at a selected work site.
~4, ~ - 2 -~, ~
,~ .
,. . .
A speed sensitive dump valve controls the stroke and rate of the hammer blows, and this valve is manually controlled or adjusted to vary the stroke and rate.
The hydraulic mechanism for driving the hammer ;;
stretches tension springs which will propel the hammer against the anvil. This hydraulic mechanism compresses air on the hammer lifting stroke which is vented to the discharge side of the speed sensitive dump valve to cushion the discharge.
The stanchion post is hollow and has an extension foot replacably and adjustably mounted on the lower end of the post for engaging the surface of the work site.
A work piece guide can be removably mounted on the lower end of the stanchion post to slidably guide the work piece.
The end of the derrick assembly suspending the driving tool has a cap with means to rotate and tilt the driving tool relative to the derrick assembly.
.~ .:. - .
The following detailed descriptions of the embodiments of the invention shown on the annexed sheets of _.. ....... .
drawings will make readily apparent to those skilled in the -art other and further objects and features of the invention.
ON THE DRAWINGS
.. .... .
Fig. 1 is a side elevational view of a truck-mounted post driving machine according to this invention showing the J..~
.'~ ' ' .
.
10~47S
opcrating posi~-ion in solid lines and the low level travcl position in ~otted lines.
Fig. 2 is a fragmentary transverse elevational view of the control station of ~he machine taken generally along the line II-II of Fig. 1.
Fig. 3 is a fragmentary longitudinal view of the control s~ation taken generally along the line III-III of Fig. 2.
Fig. 4 is a transverse sectional view, with parts and elevation, taken along the line IV-IV of Fig. 1.
Fig. S is a fragmentary side elevational view of the free end of the boom of the machine of Pig. 1 and the post driving tool detachably mounted thereon.
Figure S-A is a fragmentary cross-sectional view generally along the line VA-VA of Fig. S but displaced from this ~-;
line to extend through the roller axes.
Pig. 5-B is a fragmentary horizontal cross-sectional ~ -view along the line VB-VB of Fig. S.
Fig. 6 is a transverse sectional view along the line VI-VI of Fig. 5.
Fig. 7 is a fragmentary rear elevational view of the post driving tool attachment of Pig. 5.
Pig. 8 is a top plan view with parts in horizontal section taken generally along the line VIII-VIII of Pig. 5.
Pig. 9 is a fragmentary longitudinal sectional view with ~ -parts in elevation taken along the line IX-IX of Pig. 7, Pig. 10 is a horizontal section.ll view taken generally alon~ the line X-X of Fig. 1 witll parts broken away ~o show 4 _ - -, '~
1~4~475 underlying structure.
Fig. 11 is a vertical sectional view takcn generally along the line XI-XI of Fig. 10.
Fig. 12 is a vertical sectional view, with parts in elevation, of a tilt switch attached to the stanchion and taken generally along the lines XII-XII of Fig. 1.
Fig. 13 is a top plan view of the tilt switch of Pig. 12 with parts in transverse section and a wiring diagram illustrating the manner in which the switch is connected to a sighting device at the operator's station. : -Fig. 14 is a fragmentary side elevational view of the lower end of the stanchion carrying a removable foot plate and post guide Fig. 15 is a horizontal sectional view, with parts in top plan, taken along the lines of XV-XV of Fig. 14.
Fig. 16 is a fragmentary elevational view of the lower end of the stanchion on which a foot plate with an elongated leg portion is mounted to increase the height of the stanchion when resting on the ground.
Pig. 17 is a transverse cross-sectional view taken along the lines XVII-XVII of Fig. 8.
Fig. 18 is a top plan view of the stanchion showing the motor drive for down-crowding.
~ig, 19 i9 a side elevation along the line XIX-XIX of Pig. 18.
Pig. 20 is a diagrammatic view of the hydraulic control ~ystem for the machine.
10~47S
As ~hown in I;ig, 1, the driving machinc ]0 includcs a standard au~omotive vehicle, such as an open box trucl~ 11, a hydraulic derrick asscmbly 12 mounted on the truck 11, and a driving tool assembly 1~ detachably mounted on the free end of an S extensible boom of the derrick assembly 12.
The tool assembly 13 includes a stanchion type tower 14, a carxiage 15 slidably mounted on the stancllion 14, a hamrner housing and anvil support 16 mounted on the carriage 15 rearwardly of the stanchion 14, a hydraulic hammer lift mechanism 17, carried by the housing 16, and a hydraulic control system 18 operated from a station that rotates with the derrick assembly 12.
As illustrated in Fig. 1, the vehicle 11 is a convention-al three-quarter or one-ton open-box truck with a driver's cab 19 at the front thereof and an open-top box body 20 at the rear thereof over the rear wheels 21. An upright inverted U-shaped frame 22 is mounted on the truck 11 behind the cab 19 and as shown in Fig.
4 has an open-top support 23 for the boom of the derrick assembly 12 and a depending strap receptacle 24 for the stanchion 14 of the tool assembly 13. The support 23 and strap 24 are mounted on the top bight portion of the U-shaped frame 22 midway between the side legs of the frame and as shown in Fig. 1, the frame 22 pro-jects above the ca~ 19 just far enough so that the tool 13 will leave the windshield of the cab 19 unobstructed when the derrick 12 and tool 13 are in their stored travel position shown in dotted line~ in Fi~ 1 with the stanchion suspended in the strap 24, As shown in Figs. 1, 10, and 11, the truclc 11 has a frame 25 frorn which a rear a~le 26 for the rear wheels 21 is 10~447S
suspendcd by lcaf spring.s 27. A cross framc brace 2.~a mounts sleeve bea~ings 28 adjacent the longitudinal frame beams 25b and a stiiY torque resisting tube 29 is rotatably n ounted adjacent its ends in thesc bearings 28. If desired a single tubular bearing 28 S could span the length of the cross frame 25a to rotatably mount the tube 29 along its own entire length to prevent buckling of the tube under torsion loads. The ends of the tube 29 have rearward-ly extending stabilizer arms 30 fixedly secured thereto and the rear ends of these arms 30 are connected thl^ough pivoted links 31 with spring shackle bolts 32 embracing the axle 26 and straddling the springs 27 at their mid points.
This arrangement of the tube 29, stabilizer arms 30 and links 31 accommodates flexing of the springs 27 to provide the spring suspension for the vehicle frame 25, but prevents the springs on one side of the trucl~ from being flattened under load more than the springs on the other side of the truck, thereby stabilizing the truck frame against transverse tilting under load.
This stabilizer arrangement avoids the necessity for outriggers on the truck 11 since the frame of the truck 25 cannot tilt laterally under the load of the derrick 12 and tool 13 and a stable platform for the derrick 12 is insured, As shown in Fig. 1, the derrick 12 has a pedes~al mounting 33 supported from the truck frame 25 on a base plate 34, A hole is cut through the box body 20 so that the base plate 34 may be boltcd directly to the frame 25 and the pedestal 33 permitted to projcct into thc body 20 at about the mid point thereof over the rear wheels 21. An upright inner mast or Spilldle 35 plOj~CtS from th~ pedestal base 33 and rotatably mount:3 an outer mast or sleeve 36 which is rotated by hyc~aulic motor 37 tbrough a worm and ring gear drive 38.
The operator's station 18 is mounted on one side of the outer mast or sleeve 36 and the upper end of the mast supports the inner end of a lower boom 39 on a horizontal pivot 40. This lower boom 39 is raised and lowered cabout the pivot 40 by a hydraulic jack 41 supported from the base of the mast 36. The lower boom 39 is hollow and telescopically mounts an upper boom -42 which is propelled into and out of the boom 39 by a hydraulic jack 43.
The mast sleeve 36 mounts the derrick booms 39 and 42 for a full 360 degree rotation around the mast 3~ of the pede-stal mounting 33 and the operator's station 18 rotates therewith so -that the operator is always facing the tool 13 mounted on the free end of the boom 42. The lower boom 39 is swingable on its pivot base 40 from a substantially vertical high~ position to a lower than horizontal position as shown in Fig. 1 and the hydraulic jack 41 is effective to load the boom assembly downwardly for pressing the stanchion 14 of the tool 13 tightly against the ground.
To swing the tool 13 from its ground supported upright position rearwardly o~ the truck shown in Fig. 1 to any other operating position, the boom 39 is merely lifted to raise the stanchion 14 of~ the ground and rotated to the desired work site which could be on either side of the truck or even above the truck.
To move the derrick 12 and the tool 13 to the low-lcvel storage po~ition for travel, ~8 shown in dotted lines in l-~'ig. l";he tool is lQ4 ~475 tiltcd back unde~ the boom 39 and m~nipulated to move thc stanchion 14 in~o the strap 24 whereupon the boom 39 may then be lowered in~o the support 23.
As sbown in Fig. S, the tool 13 is detachably mounted on the end of the upper boom 42 by a cap unit 44 fitting over the.
free end of the upper boom 42 and secured thereto by bolts 45.
This cap 44 as also shown in Figs. 6 and 8, has a fixed ring .
gear 46 around which is meshed a sprocket chain 47 which is also trained around the driven gear 48 of a hydraulic motor 49 which is mounted on a head SO that is rotatable around a spindle 51 extending from the cap 44 as shown in ~ig. 6. The arrangement is such that the chain 47 is held stationary by the cap 44 and ~ .
when the gear 48 is driven, the motor pulls the head SO around ..
the spindle 51.
The rear end of the head 50 is pivoted by a pin 52 to a rearwardly projecting rib 53 of the stanchion 14. Four bolts 45 positioned in diametrically opposite pairs are sufficient to secure the cap 44 to the boom 42 and are easily accessible for removal to detach the tool 13 from the boom 42.
A hydraulic jack 54 is pivotally mounted on the head 50 and as shown in Fig. 1, has its piston rod ~5 pivoted to a bracket 56 pqojecting from the front side of the stanchion 14 adjacent the `
upper end of the stanchion. This jack 54 is effective to tilt the stanchion forwardly and rearwardly while the hydraulic motor 49 ~ ;~
is effective to rotate the stanchion on l:he end of the boom 42.
In this manner the attitude of the stancl~ion 14 relative to the ground or other ~urface to be impacted is accurately con~roll~d. :-.. ~
~s shown in Figs. 6, 8 and 17, the head 50 support~
a second hydraulic inotor 57 driving reducing gears (not shown) in a gear box 58 having an output shaft 59 which, as shown in Fig.
17, is coupled tO a shaft 60 of a ball valve 61. The ball valve 61 S has a housin~ with an inlet 62 and an outlet 63 together with a ball chamber between the inlet and outlet forming a socket for a ball 64 rotated by the shaft 60. The ball 64 has a bore 64a there-through joining the inlet 62 with the outlet 63. When the ball valve 64 is rotated 90 degrees from the position shown in Fig. 17, it closes communication between the inlet and outlet. The arrangement is such that when the ball 64 is rotated a full revolu-tion, the valve 61 will perform two opening and two closing cycles.
The speed of xotation of the ball 64 thus controls the rate of the opening and closing cycles.
As shown in Figs. 8, 9, 14 and lS, the stanchion 14 is a hollow square post 65 with a rear corner facing lhe carriage 15 and a front corner facing the head SQ
As shown in Figs. 1, 18, 19 and 20 the top end of this post 65 rotatably supports a sprocket 66 driven by a chain 67 from a hydraulic motor 68 mounted on the bracket 56 which ~ -projects from the rear corner of the post 6S.
As æhown in Figs. 1, 5, 9 and 20, the stanchion post 65 also rotatably mounts a sprocket 69 near the bottom end -thereof on bearing blocks 70 that are vertically adjustable by a screw adjustment 71. The sp~ocket 69 is aligned with the ~:op sprocket 66 and extends through a wlndow cut through the rear corner of the stanchion post 65.
- 10 - ' 1~49~Y~
~ sprocket chain 72 is trained around the sprock~ts 66 and 69 and has an inner run 72a extending through the hollow stanchion post 65 (Fig. 18) and an outer run 72b outside of the stanchion post over the rear corner thereof.
The bot~om of the post 65, as shown in Figs. 9, 14 and 15 has an enlarged foot plate 73 mounted thereon to rest on the grouncl G. This foot plate 73 has an upstanding square tube 74 centered thereon and slidably ~ltting the post 65.
A removable pin 75 extends through aligned holes in the post 65 and tube 74 to secure the foot plate to the bottom of the post.
As shown in Fig. 16, the effective length of the post 65 is increased by removing the foot plate tube 74 from the bottom end of the post 65 and replacing it with an extension tube 76 that fits over the bottom end of the post 6S and is secured thereto by the same pin 75 used for the tube 74. This extension post 76 has a foot plate 77 on the bottom end thereof adapted to rest on the ground G so that when the tool 13 is to be used for driving long posts or other work piece~ into the ground, it can be extended to any desired height by use of variable lengths of extension of tubes 76. '~
The carriage 15, as shown in Figs. 5, 8 and 9 has a ~ -square hollow tube 78 slidably mounted on the post 65 with a slot or cleft gap 78a (~ig. 8) in its front corner accommodating free passage of the rib 53 therethrough. This tubular base 78 is only a fraction of the length of the post 65 BO as to have an extended travel length from the bottom to the top of the post 65.
4~S
A~ shown in Figs. 5 and 9, ~-he outer run 72b of the chain 72 is anchorcd to brackets 79 at the top and bottom cnds of the carxiage tube 78, The chain thus drives the tubular basc 78 of the carriage along the length of the tubular post 65.
An upstanding sleeve 80 is carried by the carriage base tube 78 from a rib 81 secured on the rear corner of the base 78 and from welded-on bracket plates 8~ at the top and bottom ends of this rib 81, as shown in Figs. 5 and 9. The sleeve 80 is formed in two longitudinal halves bolted together by bolts 83 extending through mating flanges provided on these halves. The arrangement is such that the outer half can be removed from the inner half of the sleeve 80 to permit installation of the hammer -housing as hereinafter describea As shown in Figs. 5 and 7 to 9, the hammer housing and anvil support 16 include a tubular barrel 84 extending through the tubular bracket sleeve 80 and fixedly clamped therein so as to ~-parallel the stanchion post 65 and travel with the carriage base 78.
As shown in Figs. 5, S-A and 9 to further lock the barrel 84 to the base 78 and prevent sliding of the barrel in the sleeve 80, the bracket 79 at the bottom end of the carriage tube 78 extends between two lugs 84b welded on the barrel 84 and a removable pin P extends through mating holes in the lugs and bracket. The pin ~ -P is removed when the outer half of the bracket sleeve 80 is removed so that the barrel may be removed from the carriage.
The top end of the barrel 84 projects above the tubular ~ ~ -bracket 80 and has four angle iron legs 85 extending upwardly --therefrorn to a cap 86 with a rubber bumper 87 on its lower face, -~
~4~475 The bottom of the barrel 84 projects below the tubular mounting slceve 80 and has an out-turned flnnge 88 spaced from its open bottom end. A sleeve 89 is slidably mounted in this open bottom end of the barrel 84 and has an anvil head 90 (Fig. 9) secured in its upper end thereof. The bottom of the sleeve has an out-turned flange 91 and rods or straps 92 suspended from the flange 88 of the barrel fft freely through lloles in the flange 91.
Pins or nuts 93 on the bottom ends of these straps or rods receive the flange 91 thereagainst to maintain the sleeve 89 in the barrel 84. A compression coil spring 94 surrounds the bottom end of the barrel 84 and has its ends abutting the flanges 88 and 91.
Three or fou~ rods or straps 92 spaced equally around the barrel 84 are sufficient to slidably suspend the sleeve 89 from the barrel.
As shown in Fig. 9, a work piece W. P. extends into the sleeve 89 with the anvil head 90 resting on the top thereof~
When, as hereinafter described, the carriage 15 is down-powered -to move the barrel 84 for pressing the anvil head 90 against the work piece W. P., the spring 94 will be compressed and will be effective to maintain the anvil head 90 constantly against the work piece, -The barrel 84 as shown in ~igs. 5, 5-A, 7 and 8 rotatably supports two sets of four rollers 9S arranged symmetri- -cally around the barrel with the first set being at a level adjacent the top of the barrel and the second set being at a lower level but above the bottom of the baxrel. Each roller 95 is rotatable about an axis tran~versely of the barrel and projects through a slot 96 (Pig. 5-~) in the barrel 84 so that it will pqesent a rolling face ~4g~S
interiorly of the b~rrel. Thc rollers 95 are supportcd on axlcs carried by ears 97 projecting from the barrel on each side of each xoller.
A heavy hammer 98 of circular cross section and substantial length fits freely in the barrel 84 and rides on the rollers 95 as best shown in Figs. 5-A and 9. The hammer 98 preferably has a reduced diameter hardened leading end 99 for impacting against the anvil 90. The stroke of the hammer in the barrel 84 is between this anvil 90 and the top bumper 87 depending from the cap 86 supported in spaced relation from the top of the barrel 84 by the angle iron legs 85. The relative lengths of the barrel 84 and hammer 98 are such that the top end of the hammer 98 will always pro3ect above the top of the barrel 84.
The hammer lift assembly 17 as shown in Pigs. 5, 7 and 9 includes an upright hydraulic jack 100 having the lower end of its cylinder supp~rted on a bracket 101 mounted on the barrel 84 and having its piston rod 102 extended through a pin 103 pro- -jecting xearwardly from the top end of ~he hammer 98. The ' piston rod 102 has rubber grommets 104 therearound on opposlte sides of the pin 103 and nuts 105 threaded on the rod 102 clamp -these grommets relative to the top and bottom sides of the pin 103.
- A second pin 106 extends laterally through the top end ~ ;
of the hammer 98 and tension springs 107 are suspended from the ends of this pin 106, straddling the support sleeve 80 and barrel 84 and pinned at their lower ends to links 108 which in turn are pivotally mounted on laterally exl:ending supports 109 welded to the barrel flange 88.
'' `' -''' ' iO4~47'S
To provide a rest position for thc hammer causing it to follow the carriage as it is raised and lowcred, bumpers 110 of resilient material are mounted on support:s 111 carried on a top flange 84a OI the barrel 84 to receive the pin 106 the~eagaint.
S The springs 107 hold the pin 106 against the bumpers 110 in the idle position of the hammer but in the operating position the carriage down-crowds the anvil head 90 against the work piece to compress the spring 94 so that the hammer 98 will strike the anvil head before the pin 106 reaches the bumpers 110. The pin 106, of course, extends fxeely between the legs 85 carried by tlle barrel 84.
As shown in ~ig. 7, the lift jack 100 has the piston rod 102 extending into the jack cylinder to a piston head 112 and -pressured fluid from a feed pipe 113 is fed into the cylinder under the piston 112 and is relieved from the cylinder through a dis- ~ -charge pipe 114. In addition an air conduit 115 is provided at the upper end of the cylinder 100 to receive air from the cylinder above the piston 112 as the piston is raised in the cylinder.
Thus, when fluid is forced into the cylinder below the pisl:on 112, air will be forced into the air line 115. Conversely, when fluid is dumped from the cylinder under the piston 112, the stretched springs 107 will impel the hammer to deliver its blow against the anvil head 90 and at the same time air will be sucked from the air line 115 into the cylinder above the piston 112.
If desired, the hammer housing and anvil support 16 and the h~draulic mechanism 17 can be replaced with a self~con-tain~d driv~ tool ~uch as a standard air, hydraulic, elec~ric or gas-driven hammcr or breaker tool. To this end, thc sleeve 80 is opened up hy removal of the bolts 83 and the pin P is removed permitting l-emoval of the barrel 84 and the barrel carried com-ponents. Then, for example, the barrel or housing of a standard S air hammer or breaker tool can be clamped in the sleeve 80 and pinned to the carriage base 78. The barrel or housing oP the standard air hammer ~ool suspends the spring-loaded anvil sleeve 89 so that the anvil 90 will be impacted by the hammer or other driven impact members in the driver tool. The power for driving this type of tool can be supplied from any suitable source such as an air compressor which may be mounted on the vehicle 11. The carriage 15 can be down-crowded to lower the anvil head against the work piece or against a tool such as a breaker chisel to be --~
driven by the hammer.
The compressing of the spring 94 by the weight OI the driver tool and the down-crowding load applied thereto fr~m the carriage 15 will, as explained above, not only maintain the anvil head against the work piece or breaker, but will continue to load the work piece or tool and avoid the "pogo stick" recoil encountered with hand manipulated air hammers or jacks. The stanchion post ~ -65 will, of course, rest on the surface being impacted by the ~:ork piece or breaker tool and will be positioned at a controlled attitude relative to this surface for guiding the direction of the driving of the work piece or tool.
.. .. . .
As shown in Fig. 20, a supply tank 116 feeds hydraulic fluid to a main pump 117 driven by an auxiliary engine E. This engine and the tank 116 are supported on the outer mast 36 of the 1~447~
pedestal mountin~ for tl~e derrick a~sembly 12 as shown in I~ig. 1.
A second hydraulic pump 118 is also clriven by the engine E. The pump 117 has a large capacity of about 26 gallons per minu~e and is used exclusively for the hydraullc lift mechanism 17. The pump 118 may have a smaller capacity of about 7 gallons per minute and serves the hydraulic derrick assembly 12, the tilting and rotating hydraulic controls for the stanchion 14 and the carxiage mechanism 15. :
A supply conduit 119 from the pump 118 feeds the manifold of a valve bank 120 containing six valves 120a through 120f, each con~rolled by a separate hand lever 121 from the operator's station 18 which as described above in connection with - ' the derrick system 12, is mounted on the outer mast or sleeve 36.
This operator station 18 includes an operator's seat 122 shown in Fig. 1 and a console 123 shown in ~igs. 2 and 3 in front of the seat 122. As shown, two of the hand levers 121 have depending arms 124 connected by links 125 to cranks 126 independently rotatable on a console carried cross shaft 127. Each crank 126 is connected through two links 128 to two foot pedals 129 and 130.
One pedal is depressed to lift a link 128 while the other pedal is depressed to lower a link 128 thereby rocking each crank 126 in opposite directions to pull and push the valve levers 121. The arrangement is such that the levers 121 having these foot pedal ,f;
connections can be manipulated by the feet of the operator leaving his hands free to manipulate the other control levers 121.
As shown in Fig. 20 the valve 120a supplies prc~suri~ed fluid through a conduit 131 to the hydraulic motor 68 10'~4g7S
which drivcs the sprocket 66 and cl-ain 72 for controlling thc down-loading of thc c~rriage ~ssembly 15. Fluid from the motor 68 is discharged back to the valve through the conduit 132 on this down-load cycle. The valve 120a car. be reversed to feed fluid through the conduit 132 for reversing the motor 68 to raise the carriage assembly. A bleeder valve 133 at the operator's station 18 is manually controlled to bleed pressurized ~luid from the conduit 131 back to the tank 116 for accurately controlling the downward load-ing of the carriage assembly 15.
The valve 120b controls flow of fluid through conduits 134 and 135 to the hydraulic motor 49 for controlling the direction of rotation of the motor drive sprocket 48 thereby controlling the direction of rotation of the head 50 on the end of the boom 42.
The valve 120c controls flow of fluid through conduits --136 and 137 to the hydraùlic jack 43 for driving the boom ~2 in both directions into and out of the boom 39 thereby co~trolling the effective length of the derrick assembly 12.
The valve 120d controls fluid through conduits 138 and - ~ -139 to drive the motor 37 in opposite directions ther~y controlling - -the direction of rotation of the outer sleeve or mast 36 and thus - ~ --controlling the direction of the derrick booms 39 and 42 relative to the vehicle 11. ~ -The valve 120e controls fluid flow through the conduits 140 and 141 to control the jack 54 for tilting the stanchion ~ower 14 about the pivot 52.
The Yalve 120f controls t-ydraulic flow through conduits 142 and 143 to actuate the boom li~ing jack 41 in both dircction~
4'~5 including a down-loading of the boom.
~rom the above descriptions, it will be understood that the pump 118 supplies the hydraulic fluid through the valve bank 120 for supplying hydraulic power to all of the hydraulic compon-S ents with the exception of the hammer lift mechanism ]7. This pump 118 is driven whenever the auxiliary engine E is operated in order that hydraulic power will be available to manipulate the derrick 12, and the devices for positioning the tool assembly 13 relative to the derrick assembly. On the other hand, the high-flow capacity pump 117 is only driven when the hammer is in operation and therefore a clutch 144 is provided between the engine 1~ and the pump 117. This clutch can take the form of a loose belt pulley drive where the belt is tightened whenever it is desired to drive the pump 117.
The pump 117 supplies hydraulic fluid under pressure through the conduit 113 feeding the bottom end of the hydraulic lift jack 100 as explained hereinabove. This fluid is then returned through the discharge conduit 114 under the controi of the dump ~, valve 61 described above.
A by-pass valve 145 is provided in the conduit 113 ahead of the lift jack 100 to by-pass fluid back tO the tank 116 through a return conduit 146. The valve 145 is controlled by the spring loaded anvil 89 by a link 147 attached to the flange 91 of the anvil sleeve 89 so that fluid is by-passed from the feed conduit 2S 113 to the return conduit 146 until the anvil is loaded againsl: a work piece W. P, by down-crowding the carriage assembly 15 to compress the anvil spring 94 and thus hold the anvil head . .
.
10449~5 constanEly against the work piece as described hereinal)ove, ~y-passed fluid in ~he return conduit 146 flows through a check valve 147 into the return conduit 114 back to the tank 116. The check valve 147 is downstream from the dump valve 61.
S Air flow into and ou~ of the top end of the lift jack 100 above the piston, as explained above, is accommodated through the air line 115 which, as shown in Fig. 17, communicates with the return conduit 146 which extends to a check valve 148 on the top of the tank 116. The check valve 148 opens to admit air from the tank into the top of the jack 100 on the downstroke of the jack but locks air in:the conduit 146 on the upstroke of the jack, thereby forcing this air through the check valve 147 into the return conduit 114. The tank 116 is thus maintained under an elevated pressure and the conduit 114 will be loaded with air downstream -1~ from the dump valve 61 so that when this valve is open, the ~ -dumped fluid from the bottom of the lift jack 100 will discharge ~, ,.,...~ ..
against an air cushion to lessen surging and shock loads on the -~`
fluid conduits. The air cushioning effect is obtained without any added component since it is developed by the same hydraulic jack 100 that is used to lift the hammer 98 and stretch the springs 107.
In order to facilitate accurate control of the attitude of the stanchion tower 14 from the operator's station at the console 123, as shown in ~igs. 2 and 17, a sighting device 149 is mounted on the console of the operator's station and this device cooperates with a tilt switch 150 mounted on the front end edge of the stanchion post 65. ~ -' '~' ' . .. '' - 20 ~ ~
1~4~4~S
As sl~own in Figs. 12 and 13, this til~ switch 150 has a plastic casing lSl with a domed top from which is suspended a heavy metal ball 152 by means of a metal fle~ le wire or cable 153.
The side wall of the casing 151 carries four electrical contacts 154 surrounding the ball 1$2 with each contact being connected through a wire 155 with a light bulb 156 in the sighting device 149. Electrical energy from a suitable source such as a battery B supplies current to the ball 152 through a wire 157 and the cable 153. When the ball 152 swings to engage a contact 154, current flows through the wire 155 of this contact to the filament in the corresponding bulb 156 and then flows from the filament back through a wire 158 to the battery B.
One pair of contacts 154 is aligned transversely of the lS stanchion post 65 to be engaged by the ball when the post is tilted laterally. The direction of tilt is that indicated by one of the laterally arranged light bulbs 156. The other set of contacts 154 is aligned so as to be engaged by the ball 152 when the stanchion post 65 is tilted forwardl~- or rearwardly and these contacts in turn energize the top and bottom light bulbs 156 in the sighting device 149. Thus, the operator has an immediate reading of the lateral or longitudinal tilt of the stanchion and can easily manipu- ~
late the valve 120b to actuate the hydraulic motor 49 for correct- -ing lateral tilt or the valve 120e to actuate the jack 54 for ~ ~
controlling front and rear tilt of the stanchion post. ~ -As shown in Figs. 14 and 15, the stanchion post 65 carrie~ a removable collar 159 beyond the rear edge ~hereof to ~ 21 -S
rcceive the work piece W, P. This collar is sl~pported from a rearwardly projecting cye socket 160 projccting rearwardly from the rear corner of the post 65 and similar eye sockets 161 on the side walls of the post laterally of the socket 160 but at a lower level. The work piece post guide collar 159 has a cylindrical bore of sufficiently large diameter to accept removable bushings 162 witll variably sized internal diameters and shapes for slidably receiving work pieces of different sizes and shapes. The collar has a top leg 163 adapted to overlie the socket 160 and side legs 164 adapted to overlie the sockets 161. The ends of these legs 163 and 164 are apertured to accept connector pins 165 which extend through the sockets and mount the guide collar 159 in a horizontal plane rearwardly from the lower end of the staltchion post 65.
The guide collar 159 is thus easily mounted on and removed i~om the stanchion post 65 and can accept bushings of different internal diameters and sizes to slidably guide work pieces adjacent the ground level. With the upper end of the work piece also mounted in the anvil sleeve 89, the work piece is thus held parallel with the stanchion post 65. -Fxom the above descriptions it will be understood that the driving machine 10 of this invention, being mounted on a mobile vehicle 11 can be driven to the work site with the derrick 12 and driving tool 13 at a low-level carry position shown in dotted lines ; -in Fig. 1. In this low-lcvel position, the boom 42 is firmly seated in the support 23 of the frame 22 and the iree end of the stancl]ion 14 i~ Ruspended in the s~rap 24. At the work site the derrick boom 42 is cxtendcd from the boom 43 to retract the stanchion 1~ from thc strap 24 and the dcrrick is ~hen raised and swung to position thc stanchion 14 at the exact spot where thc work piece is to be driven.
It is pre~erred to down-load the derrick to hold the foot plate 73 of the stanchion post 65 tightly against the ground, wall or other surface to receive the work piece. The attitude of the stanchion relative to the ground is then carefully adjusted so that the work piece will be driven in the exact desired direction. Next, the carriage assembly 15 is raised on the stanchion post 65 so that the upper end of the work piece can be inserted in the anvil sleeve 89 with the anvil head 90 resting on top of the work piece.
The carxiage is then powered downwardly on the stanchion post 65 to compress the coil spring 94 of the anvil thereby closingthe by-pass valve 145. Hydraulic fluid then flows into the lower end of the lifting jack 100 to raise the hammer 98 on its guide barrel 84.
The dump valve 61 is driven by the electric motor 57 at an exact speed controlled by the operator from a rheostat R or the like current regulator mounted on the console 123. The motor 57 could also be hydraulically driven with a bleeder control such as the control 133 for the motor 68. When the valve is closed, fluid will flow under the piston in the lifting jack 100 to raise the hammer and this lifting action will continue until the valve is opened to dump the hydraulic fluid. The speed of rotation of the - -dump valve thus controis the height to which the hammer is lifted and cooperates with the speed of the pump 117 to create a desired i ~
impact rate for the h~mmer. ~ -- 23 - ~
l~J~7S
On thc li~ing strokc, the hammer stre~:ches the springs 107 and then when the dump valve 61 is op~ned thc liting forcc OIl the hydraulic lifting cylinder 100 is released permitting the springs and gravity to propel the hammer against the anvil Iléad 90 to deliver its clriving blow to the work piece W. P.
During the lifting c~rcle, air above the piston in the lifr- .
ing cylinder 100 is compressed into the hycll-aulic fluid return con- .....
duit downstream from the dump valve 61 so that on the next succeeding dumping of the fluid, an air cushion will be provided to minim shock loads in the conduit.
After the hammer delivers its impact blow against the anvil to drive the work piece into the ground, the hydraulic load on the carriage 15 is maintained at a sufficient level so that the carriage will be down-crowded to follow the work piece and cause :
the anvil head 90 to remain in contact therewith Any lag in this down-crowding follow-up will be accommodated by the compression spring 94 which can elongate from its compressed condition to maintain the anvil head aga.inst the work piece during the follow-up movement of the carriage. The down-crowding load is controlled .
by the bleeder valve 133. ~; -.
The vehi~le 11 stabilized against a lateral tilt as when the derrick operates the driving tool laterally of the vehicle body without resortmg to the use of outriggers, by the stabilizer arms 30 secured to the ends of the rigid rotating tube 29 carried by the vehicle frame. These stabilizer arms prevent flattening of the vehicle springs 27 on one side of the vehi.cle more tharI on the other side but operate in unison to accommodate spring suspen~ion
- 2~ ~ .
'75 of the rear wheels of ~:hc vehicle.
While the driving tool 13 is especially adapted for driving posts into the ground, it is also useful ~o pull work pieces from the ground as shown in Fig. 16 by anchoring a cable C
S around the work piece W.P. and attaching the cable to tbe flange 88 of the barrel 84 whereupon the carriage assembly 15 can be powered to lift the barrel 84 to pull the work piece W~ P.. out of the ground.
Instead of driving work pieces into the ground or pulling work pieces from the ground, the tool 13 is also useful to drive demolition tools into pavements, walls, abutments and the like.
Thus the derrick can be manipulated to carry the tool 13 to an overhead position and press the stanchion foot 73 against a wall, abutment, or the like. A demolition tool such as a chisel can be fitted in tbe anvil sleeve 89 in place of the work piece W. P. to be - - -impacted by the hammer 98 for driving, causing the wall or the like to collapse away from the vehicle. Likewise, the stanchion 14 can be manipulated to extend at an angle relative to the surface to receive the work piece, th~reby driving the work piece in any desired direction.
, . , . ~ , . . ...... .
'75 of the rear wheels of ~:hc vehicle.
While the driving tool 13 is especially adapted for driving posts into the ground, it is also useful ~o pull work pieces from the ground as shown in Fig. 16 by anchoring a cable C
S around the work piece W.P. and attaching the cable to tbe flange 88 of the barrel 84 whereupon the carriage assembly 15 can be powered to lift the barrel 84 to pull the work piece W~ P.. out of the ground.
Instead of driving work pieces into the ground or pulling work pieces from the ground, the tool 13 is also useful to drive demolition tools into pavements, walls, abutments and the like.
Thus the derrick can be manipulated to carry the tool 13 to an overhead position and press the stanchion foot 73 against a wall, abutment, or the like. A demolition tool such as a chisel can be fitted in tbe anvil sleeve 89 in place of the work piece W. P. to be - - -impacted by the hammer 98 for driving, causing the wall or the like to collapse away from the vehicle. Likewise, the stanchion 14 can be manipulated to extend at an angle relative to the surface to receive the work piece, th~reby driving the work piece in any desired direction.
, . , . ~ , . . ...... .
Claims (18)
1. A driving tool which comprises a derrick rig, a stanchion post mounted on said rig adapted to be positioned immediately adjacent the work site and rest on the surface of the work site, means on said rig pressing said stanchion post against the surface of the work site, a carriage slidable on said post, a hammer tool mounted on said carriage, a spring-loaded anvil suspended from said hammer tool and positioned to be struck by the hammer of said tool, and means for down-crowding the hammer tool to compress the spring of said spring-loaded anvil causing the anvil to follow a work piece and minimizing recoil of the hammer tool.
2. The driving tool of claim 1 wherein the derrick rig is mounted on a vehicle, hydraulic mechanism is provided for raising and lowering the carriage on the stanchion post, hydraulic mechanism is provided for powering the hammer tool to impact the anvil against a workpiece and hydraulic mechanism is provided for manipulating the derrick rig to position the driving tool at a selected work site at any location relative to the vehicle.
3. The driving tool of claim 2 including a speed sensitive valve controlling the stroke and rate of impact blows of the hammer, and a manual control for the speed of said valve.
4. The driving tool of claim 1 wherein the derrick rig is mounted on a wheeled vehicle having a frame, a pedestal is mounted on and supported by the frame and has an upright mast, a sleeve is rotatable on the mast, a lower derrick boom is pivoted on the upper end of the sleeve, an upper derrick boom is telescoped over the lower boom, the driving tool is removably mounted on the end of the upper boom beyond the end of the lower boom, means are provided for rotating the sleeve to position the derrick boom circumferentially of the vehicle, means are provided for extending and retracting the upper boom to space the driving tool relative to the vehicle, means are provided for controlling the attitude of the stanchion post relative to the upper derrick boom, a hydraulic lift mechanism is provided for said hammer tool, tension springs are stretched by said lift mechanism for propelling the hammer tool against the anvil, a dump valve is provided for said lift mechanism having opened and closed cycles, and means control the rate of said cycles to control the stroke and impact rate of the hammer tool.
5. The driving tool of claim 1, wherein the means for down-crowding the hammer tool is a hydraulic motor and a bleed valve for said motor controls the down-crowding load delivered by the motor.
6. The driving tool of claim 1 wherein the stanchion post is rotatably and tiltably mounted on the end of the derrick rig.
7. The driving tool of claim 6 wherein rotation of the post is controlled by a motor and tilting of the post is controlled by a hydraulic jack.
8. The driving tool of claim 3 wherein the hydraulic mechanism for powering the hammer tool compresses air on the hammer lifting stroke which is vented to the discharge side of the speed sensitive valve to cushion the discharge.
9. The driving tool of claim 1 wherein the stanchion post is a hollow post rotatably supporting sprockets near the ends thereof and a chain is trained over said sprockets to raise and lower the carriage with one run thereof through the interior of the post.
10. The driving tool of claim 1 wherein the tool has a cap bolted to the end of the derrick rig and the cap car-ries means for rotating and tilting the driving tool relative to the derrick rig.
11. The driving tool of claim 3 including a variable speed electric motor driving said valve.
12. The driving tool of claim 1 wherein the stanchion post is hollow and an extension foot is replaceably mounted on the lower end of the post.
13. The driving tool of claim 1 including a workpiece guide removably mounted on the lower end of the stanchion post for slidably guiding the workpiece.
14. The driving tool of claim 1 wherein the anvil is hollow and receives the upper end of the workpiece.
15. The driving tool of claim 2 including feeding hydraulic fluid to the hydraulic mechanism for powering the hammer tool having a bypass valve, and means closing said bypass valve only when the spring of the anvil is compressed.
16. The driving tool of claim 3 wherein the hydraulic mechanism for powering the hammer tool is a hydraulic jack receiving hydraulic fluid beneath the piston thereof and air is compressed above the piston on the lifting stroke to cushion discharge from said speed sensitive valve.
17. The driving tool of claim 1 wherein the carriage has a sleeve embracing the hammer tool and a removable pin connection between the hammer tool and carriage prevents sliding of the tool in the sleeve.
18. The driving tool of claim 17 wherein the sleeve is composed of two bolted together longitudinal halves adapted to be separated and wherein said pin is removable to permit removal of the hammer tool from the carriage.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US05/575,462 US4050526A (en) | 1975-05-07 | 1975-05-07 | Post driving machine |
| US05/674,901 US4124081A (en) | 1975-05-07 | 1976-04-08 | Post driving machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1044475A true CA1044475A (en) | 1978-12-19 |
Family
ID=27076700
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA251,035A Expired CA1044475A (en) | 1975-05-07 | 1976-04-26 | Post driving machine |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1044475A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112647881A (en) * | 2020-12-28 | 2021-04-13 | 山东大学 | Vehicle-mounted full-automatic tunnel surrounding rock coring system and method |
| CN114233177A (en) * | 2021-12-14 | 2022-03-25 | 唐山首钢马兰庄铁矿有限责任公司 | Pneumatic impact rock drilling through hole device for blast hole of underground medium-length hole |
| CN117888817A (en) * | 2024-03-15 | 2024-04-16 | 山东创驰安防科技有限公司 | Prospecting equipment for geotechnical engineering |
-
1976
- 1976-04-26 CA CA251,035A patent/CA1044475A/en not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112647881A (en) * | 2020-12-28 | 2021-04-13 | 山东大学 | Vehicle-mounted full-automatic tunnel surrounding rock coring system and method |
| CN114233177A (en) * | 2021-12-14 | 2022-03-25 | 唐山首钢马兰庄铁矿有限责任公司 | Pneumatic impact rock drilling through hole device for blast hole of underground medium-length hole |
| CN114233177B (en) * | 2021-12-14 | 2024-03-22 | 唐山首钢马兰庄铁矿有限责任公司 | Pneumatic impact rock drilling through hole device for underground medium-length hole blast hole |
| CN117888817A (en) * | 2024-03-15 | 2024-04-16 | 山东创驰安防科技有限公司 | Prospecting equipment for geotechnical engineering |
| CN117888817B (en) * | 2024-03-15 | 2024-05-07 | 山东创驰安防科技有限公司 | Prospecting equipment for geotechnical engineering |
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