CA1167348A - Maneuvering portion structure of an excavation work vehicle - Google Patents
Maneuvering portion structure of an excavation work vehicleInfo
- Publication number
- CA1167348A CA1167348A CA000363093A CA363093A CA1167348A CA 1167348 A CA1167348 A CA 1167348A CA 000363093 A CA000363093 A CA 000363093A CA 363093 A CA363093 A CA 363093A CA 1167348 A CA1167348 A CA 1167348A
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- Canada
- Prior art keywords
- maneuvering
- valve
- interlocking
- arm
- boom
- 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.)
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Abstract
ABSTRACT
The present invention provides a control handle for an excavation work vehicle, comprising a maneuvering valve for boom swivelling, a maneuvering valve for up-and-down boom rocking, a maneuvering valve for arm rocking, and a man-euvering valve for bucket pivoting, said maneuvering valves being disposed substantially in parallel and being interlock-ingly connected via four parallel interlocking systems employ-ing push-pull rods to two maneuvering levers adapted for free rocking movement in both longitudinal and transverse direc-tions relative to the machine body such that each lever is capable of actuating a pair of said maneuvering valves, sim-ultaneously or separately, and an intermediate interlocking mode change-over mechanism for changing the mode of the interlocking between said two maneuvering levers and said four maneuvering valves.
The present invention provides a control handle for an excavation work vehicle, comprising a maneuvering valve for boom swivelling, a maneuvering valve for up-and-down boom rocking, a maneuvering valve for arm rocking, and a man-euvering valve for bucket pivoting, said maneuvering valves being disposed substantially in parallel and being interlock-ingly connected via four parallel interlocking systems employ-ing push-pull rods to two maneuvering levers adapted for free rocking movement in both longitudinal and transverse direc-tions relative to the machine body such that each lever is capable of actuating a pair of said maneuvering valves, sim-ultaneously or separately, and an intermediate interlocking mode change-over mechanism for changing the mode of the interlocking between said two maneuvering levers and said four maneuvering valves.
Description
~.~6~
This invention relatesto a control handle structure of an excayation work vehicle~ which connects a maneuvering valve for boom swiveling, a maneuvering valve for boom up-and-down rocking, a maneuveriny valve for arm rocklng and a maneuvering valve for bucket pivoting, interlockingly to two maneuvering ]e-vers adapted for free bi-directional rocking maneuvering, in a manner capable of separa-te individual maneuvering and capable of simultaneous maneuvering in respective pairs.
In order to maneuver, as easily and as efficiently as possible, a maneuvering valve forboom swiveling, a maneuvering valve for hoom up-and-down rocking, a maneuvering valve for arm rocking and a maneuvering valve for bucket pivoting, of an exca-vation work vehicle, a control handle structure is used that uses two maneuveri.ng levers adapted for free bi-directional rocking maneuvering, which are capable of maneuvering separately the individual valves and capable of maneuveri.ng simultaneously them in respective pairs.
As for the interlocking connection of the two maneuv-ering levers and the four maneuvering valves in conventional in-stances, a mode has been adopted, wherein one interlockingly con-nects respective pairs of the maneuvering valves each closely , interrelated as ~o the mancuvering, thus in two sets, and one respectively connects them simply to the said two maneuvering levers, via four interlocki.ng SySterQS comprising push-pull rods.
l~owever, as to -the interlockiny relationship between said two maneuvering 1evers and four maneuvering valves, namely as to which particular maneuvering valve and which particular rnan-euvering valve to in-terlockingly connect to which particular maneuvering lever, it is dirferent according to the custom pre-vailing in -the respective countries of the world and to the par-ticular manufacturers.
As is again referred to in detail in the later-described embodiment of this invention, it is generally the case that for instance in England they connect the maneuvering valve for boom up-and-down rocking and ~he maneuvering valve for bucket pivot-ing, interlockingly to one maneuveri.ng lever adapted for free bi-directi.onal rocking, and connect t]le maneuvering valve for arm rocking and the maneuvering valve for boom swiveli.ng, inter-lockingly to the other maneuvering lever adapted for free bi-directional rocking, while in the U.S. A. they connect the man-euvering valve for arm rocking and the maneuvering valve for buc-ket pivoting, interlockingly to One maneuvering lever, and con-nect the maneuvering valve for boom up-and-down rocking and the maneuvering valve for boom swiveling, interlockingly ~6, 348 the other maneuvering lever.
Besides, there are some manufacturers also in Japan who adopt such interlocking connection structure as to maneuver the maneuvering valve for boom swiveling by the maneuvering of one maneuvering lever in the machine body back-and-forth direction.
In order to satisfy such requirements of the re-spective countries, including Japan as well, various formsof the maneuvering structures must have separately been manufactured, and it has thus been quite uneconomical.
Furthermore work efficiency is reduced when an operator having experience with the system of a particular manufacturer is used to operate another system, due to the operator's fear of performing erroneous maneuvers.
In view of the above-mentioned prior art and of the recent requirements in the various countries, this invention has as its object to provide a control handle structure of an excavation work vehicle, capable of changing over the interlocking relationship between the two maneu-Yering levers and four maneuvering valves.
To attain this object, the control handle 73~8 structure of an excavation work vehicle, accordiny to this in~
vention~ is characteri~ed in that a maneuvering valve for boom swiveling, a maneuvering valve for boom up-and-down rocking, a maneuvering valve for arm rocking and a maneuvering valve for bucket pivoting are disposed suhstantially in parallel that these four maneuvering valves are interlockingly connected, in a manner capable of separate individual rnaneuvering and capable of simultaneous maneuvering in respective pairs, via four inter-locking systems parallel with one another usi.ng the respective push-pull rods, to two maneuvering levers adapted for free rock-ing maneuvering crosswise in back-and-forth and right-and-left directions of the machine body; and that there is provi.ded, in-termediary to the said interlocking systems, an interlocking mode change-over mechanism for changing the mode of the interloc-king between the two maneuvering levers and the said four maneu-vering valves.
It is therefore possible to interlockingly connect the two maneuvering levers adapted for free rocking crosswise in back-and-forth and right-and-left directions of the machine body and the maneuvering valve for hoom swiveling, maneuvering valve for boom up-and-down rocki.ng, maneuvering valve for arm rocking and maneuvering valve for bucket pivoting, in any com-bination therebetween as to conform to the custom or the actual state as is prevailing in the respective /
countries in which they use the excavation work vehicle. This results in bringing forth the advantage, by the maneuvering por-tion structure of this invention, of inexpensively providiny the excavation work vehicle without manufacturing various specific forms of maneuvering portion struc-ture.
It is also possible, in the case there is any specific mode of the maneuvering lever system with which the operator is well acquainted and experienced, to change over into such mode of the maneuvering lever system properly suited to the operator, thus resulting as well in bringing forth the advantage of enhanc-ing the work efficiency and of promoting the safety, by the con-versant maneuvering sense.
The second object of this invention is to have, when the rnaneuvering valve for boom up-and-down rocking wllich con-trols oil of a first oil hydraulic pump is maneuvered, oil of a second oil nydraulic pump make confluence with the oil of the first oilhydraulic pump, thus to have the up-and-down rocking speed of the said boom get speed raising, and for this purpose there is provided a maneuvering valve for first confluellce and it is interlockingly connected to the said maneuvering valve for boom up-and-down rocking in a manner capable of simultaneous ma-neuvering therewith.
Furthermore, the third object of this invention '3 ~3 is to make, when the said maneuverillg valve for boom up-and~down rocking is not in use, the oil of the first oilhydraulic pump con-fluence with the oil of the second oilhydraulic pump, thus to have the actuation speed of the arm rocking or the bucket pivot-ing or e]se both of t:hem get speed raising, and for -this puxpose there is provided a maneuvering valve for second confluence, to be maneuvered in interlocking with push-pull actuation of the maneuvering valve for bucket pivoting or t-he maneuvering valve for arm rocking, in juxtaposition of the said respective maneu-vering valves via a confluence maneuvering mechanism.
Other objects and advantages of this invent;on wi]l be-come clear from the description of the specific embodiment to follow hereunder and the showing of the accompanying drawings.
The drawings show, by way of example, the best mode of the embodiment of the control handle structure of an excavation work vehicle, according to this invention, wherein:
Fig. 1 is a side elevation of the excavation work ve-hicle;
Fig. 2 is a diagram of the oilhydraulic circuit of the excavation work vehicle;
Fig. 3 is a schematic perspective view of the control handle structure;
Fig. ~ is a view showillg a portion of interlocking mode change-over mechanism partly cut away and partly in section;
Fig. 5 is a schematic perspective view of the control handle structure, showing a state for interlocking relationship 73'~
as has been changed over;
Fig. 6 is a schematic perspective view showing conflu-ence maneuvering mechanism;
s Fig. 7 is a schemati,c perspective view of the confluence maneuvering mechamism, showing the state of maneuvering same;
Fig. 8 is a schematic vi,ew showing interlocking rela-tionship of another maneuvering section;
Fig. 9 is a schematic perspective view showing the con-trol handle structure of Fig. 8;
Fig. 10 is a plan view of the control handle structure of Fig. 8, for interlocking relationship as has been changed over;
Fig. 11 is a plan view of the control handle structure of Fig. 8, for in-terlocking relationship as has been changed over;
Fig. 12 is a plan view of the control handle structure of Fig. 8, for interlocking relationship as has been further chan-ged over; and Fig. 13 is a plan view of the control handle structure of Fig. 8, for interlocking relationship as has been further changed over.
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~ J~8 This invell-ti.on is now explained in more detail hereunder with reference to the accornpanying drawings.
~i~. 1 shows a shoveling work vehicle as a specific example of an excavati.on work ~ehicle of thls invention. This shoveling work vehicle is provided with a swivel tah]e (3) as attached to the machine body (2) equipped with crawler travel ap-paratus (1~, for free pivotal maneuvering about an upright axis, and on this swivel tab]e (3~ further with an operation cab (4) and a prime mover cab as are mounted there as well as an excava-tion work apparatus (5). In constructing the excavation work ap-paratus (5) r one provides a boom (8) free to rock about a per-pendicular axis relative to a bracket (7) uprightly provided on the said swivel table (3), connects to a tip end of the said boom (8) an arm (10) with a bucket(12) connected at a tip end thereof., and provides: a fluid pressure cylinder (9) for rocking up and down the said boom (8) relative to the said bracket (7); a fluid pressure cylinder (11) for expansively and retractively rocking the said arm (10) about a perpendicular axis relative to the said boom (8); and a fluid pressure cylinder (13) for making the said bucket (12) pivot about a perpendicular axis relative to the said arm (10).
~6 ,~3 ?~8 In cons-tructing the fluid pressure driving system, as shown in Fig. 2, a maneuvering valve (Vl) for a fluid pressure motor (M) for swiyel kable driYing in order to swivel the said hoom (8) by the piYoting of the said swiYel table (3), a maneu-vering valve (V2) for the cylinder (11) for arm rocking, a maneu-vering valYe (V3) for first confluence for increasing boom rais-ing speed, a maneuYering valve (V4) for a fluid pressure motor (Ml) for a travel apparatus of one of the right and left crawlers, and a maneuvering valve (V5) for -the said cylinder (13) for buck-et pivoting are constructed in a stack valve type provided with a center bypassing flow path and are parallely connected to a first fluid pressure pump (Pl). A maneuvering vlave (V8) for the said cylinder (9) for boom up-and-down rocki.ng, a maneuvering valve (V7) for a fluid pressure motor (M2) for a travel apparatus oE the other of the right and left crawlers, and a maneuvering valve (V6) for second confluence for causing the said arm (10) and bucket (12) -to increase speed are similarly constructed in a stack valve type provided with a center bypassing flow path and are parallelly connected to a second flui.d pressure pump (P2).
As shown in Fig. 3, the said maneuvering valves (Vl) -(V8) are disposed in juxtaposition in the machine body transverse direction, with the respective sliding spools (not shown) in the state of extendi.ng in the i7;~
machine body back-and-fortil direction. Two, namely a first and a second, maneuvering ].evers (14~ (15) adapted for free rocking maneuvering crosswise or bi-directionally in the machine body back-and-forth and right-alld-left directions for maneuvering the said maneuvering valves (Vl), (V2), (V3), (V6), (V8) are provided in juxtaposition in the machine body transverse direction in front of these maneuvering valves. Two, namely a third and a fourth "naneuvering levers (16),(17) adapted for free rocking maneuvering in the machine body back-and-forth direction for maneuvering the said maneuvering valves (V4),(V7) are provided in justaposition inthemachine body -transverse direction in between the said crosswisely rocking maneuvering levers (14),(15).
The maneuvering combination mode of the said four man-euvering levers (14),(15),(16),(17) and the said ei~ht maneuvering lves (Vl)~(V2)~(V3)~(V4)~(V5)~(V6),(V7),(V8)~ to be described in detail hereunder, is the mode adopted mainly in England and so forth.
The said first maneuvering lever (14) and the said ma-neuvering va].ve (Vl) for boom swiveling are inter]ockingly con-nected to each other by means of a first i.nterlocking system (Rl) comprising a push-pull rod (18) via an interlocking member (19) so adapted that the sliding spool ( not shown) of the valve may be maneuvered in push-pull manner by the maneuvering of the said first maneuvering lever (14) i.n t-he machine transverse direction.
. ~. .~.
1~7~
The said first maneuvering lever (14) and the said maneuvering valve (V2) for arm rocking are interlockingly connected to each other by means of a second interlocking system (R2) comprising push-pull rods (20a),(20b) via an interlocking mem~er (2l) so adapted that the sLiding spool (not shown). of the valve may be maneuvered in the inachine body back-and-forth direction. The said third maneuvering lever (16) is interlockingly connected, by means of a third interlocking system (R3) comprising a push-pull rod (22) via an interlocking member (23) adapted for maneu-vering in push--pull manner the sliding spool (not shown) of the said maneuvering valve (V4) of the fluid pressure motor (~1) for the crawler travel apparatus on the left side, thus to the said maneuvering valve (V4). lrhe said fourth maneuvering lever (17) is interlockingly connected, by means of a fourth interlocking system (R4) comprisi.ng a push-pull rod (24) via an interlocking member (25) adapted for maneuvering in push-pull manner the s].iding spool (not shown) of the said maneuvering valve (V7) of the fluid pressure motor (M2) for the crawler travel apparatus on the right side, thus to the said maneuveri.ng valve (V7). The said second .naneuvering lever (15) is interlockingly connected, by means of a fifth interlocking system (R5) compri.sing push-pull rods (26a), (26b), via an interlocking member (27), to maneuver in push-pull manner, by the maneuvering thereof in the machine body transverse . .
~ti'73 ~3 direction, the sliding spool (not shown) of the said maneuvering valye (V5) for bucket plvoting, thus to the valve.
Furthermore, the said second maneuYering leYer (15) is interlockingly connected, by means of a sixth lnterlocking sys-tem (R6) comprising push-pull rods (28a),(28b~,(28c),(28d) and a con-nection rod (28e~ connecting the rods (28c),(28d), via an inter-locking member ~291, to maneuver in push-pull manner, by the maneuvering thereof in the machine body back-and-forth direction, lQ the respective sliding spools (not shown) of the said maneuvering valve (V8) for boom up-and-down rocking and the said maneuvering valve (V3) for first confluence for increasing boom rocking speed, thus to both the said valves (V8),(V3).
Midway between the said second maneuvering lever (15) and maneuvering valve (V5) for bucket pivoting there is rotatably provided a bucket-maneuvering intermediary pipe shaft (38) with its axis directed in the machine body transverse direction. On this intermediary pipe shaft (38) there is downwardly protruding-ly provided a first connection arm (39) for connecting the said push-pull rod (26b) to the sliding spool (not shown) of the said maneuvering valve (V5), with one end of the said push-pull rod (26b) rockably pivoted on tip end portion thereof.
2S Furthermore, in order to rockably connect the 73~8 said push-pull rod (26a) to a connection arm (27b) down-ward.ly protrudingly provided on. a pipe shaft (27a) of an interlocking member (27) adapted to pivot the said bucket-man.euvering intermediary pipe shaft (38) by the maneuvering of the said secon.d maneuvering lever (15) in the machine body lateral direction., there is downwardly protrudingly provided on. the said in.termediary pipe shaft (38) a second conn.ection. arm (~0), ~leans for conn.ectin.g the said respective push-pull rods (26a),(26b) and the respective first and secon.d conn.ection arms (39),(40), an.d the rod (26b) and the said conn.ection arm (27b), will become clear at the description. t oxpl~ ror~- of Fig, 4, to be given. hereinafter, ~lidway aroun.cl the said second interlockin.g system (R2) an.d sixth in.terlocking system (R6) between the said first an.d secon.d man.euverin.g levers (lL~),(15) ~md both the said maneuvering valves (V2),(V8), there is provided an in.terlocking mode change-over mechan.ism (30) adapted to change over the modes of the respective interlocking relation.ships.
As this in.terlocking mode change-over mechanism (30), an. arm-maneuverin.g in.termediary pipe shaft (31) an.d a boom-man.euv0ring in.termediary pipe shaft (32) are rotatably provided in. parallel to each other, more particularly these in.termediary pipe shafts (31),(32) are so disposed that their rotation. axes extend in the direction.normal to the mar.euvering direction. of the said respective juxtaposed ~6~73~3 push-pull rods (20a) 7 ( 28a) of the second interlocking system (.R2) and the sixth interlocking system (R6). Now, on. the said arm-man.euvering in.termediary pipe shaft (31) there are protrudingly provided in one a.n.d the same direction., namely both downwardly a first conn.ection arm (33) for connectin.g the push-pull rod (20a) of the said second in.ter-locking system (Rz), made releasable and remoun.table, interlockingly with the said first man.euvering lever (14~;
and a second conn.ection. arm (34) for enablin.g its interlock-ing connection with the said second man.euverin.g lever (15) by modifyingly remounting thc said releasable and remountable push-pull rod (20a).
On. the other hand, on the said boom-maneuvering in.termediary pipe shaft (32) there are protrudingly provided in. on.e an.d the same direction., namely both downwardly: a first conn.ection. arm (35) for conn.ecting the push-pull rod (28a) of the said sixth in.terlocking system (R6), made releasable and remoun.table, in.terlockingly with th0 said secon.d maneuverin.g lever (15); and a second connection arm (36) for com~.ecting same in.terlockin.gly with the said first man.euverin.g lever (14). At the tip end portion of the first conn.ection. arm (33) of the said arm-man.euvering in.termediary pipe shaft (31) there is pivotally attached, as shown in.
Fig. 4, a conn.ection. member (33a), screw bores being *hreaded in. both en.d portion.s of this connection. member (33a) and the said push-pull rods (20a),(20b) being respectively 3~3 screwecl into these screw borcs. ~ connection member (36a) o~ thc- structur~ the same as thi.s connectioD membcr (33a) is pivotally attaclled to the ti.p~3 end portion of the second connect.ion arm (36) of the said boom-maneuvering intermediary pipe sha:ft (32) 0n the other hancl., on a :Eirst connection arm (21b) downward.ly protrudingly provided on a pipe shaft (21a) forming a part of the interlocking member (21) o:E the said first maneuvering lever (14) there is pivotally attachecl a yoke (21c~ at the tip end thereof, a.nd to this yoke (21c) there is screwin.gly attached the other end of the said push-pull rod (20a), Thus, the said push-pull rod (20a) is releasable from and remountabl.e to both the said connection arms (33), (Z1b), The reason why -the in.termediary portion of the said push-pull rod (20a) is ~ Fig, 3~arcuate is to make this rod (20a) - when modifyingly remounted, for interloclcing interconn.ection of the secon.d conn.ection arm (34) of the said arm-man.euverin.g in.termediary pipe shaft (31) and the said secon.d man.euvering lever (15), to bridge between a connection. arm (29b), downwardly protrudingly provided on a pipe shaft (29a) forming a part of the in.terlocking member of this lever (15),an.d the said second conn.ection. arm (34~
- n.o-t to abut again.st the first conn.ection. arm (35) of the said boom-man.euvering intermediary pipe shaft (32) (see Fig, 5~.
By means of the above--menti.oned ;nterlocking mode change-over mechani.sm (30~, it is possible to change over the maneuver-ing of the said maneuvering valve (V2) for arm rocking, from the first maneuvering le-ver (14) to the second maneuvering lever (15), simply by altering the mounting posi.ti.on of the said push-pull rod (20a). Likewise, it is possible to change over the maneu-vering of the said maneuvering valve (V8) for boom up-and-down rocking and of the said maneuvering valve (V3) for fjrst conflu-ence, from the said second maneuvering lever (15) ~o the said first maneuvering lever (14), simply by altering the mounting state of another push-pull rod (28a) from the state of connecting the fi.rst connection arm (35) of the said boom-maneuvering inter-mediary pipe shaEt (32) and the connection arm (29b) of the said second maneuvering lever (15) to the state of connecting the second con-nection arm (36) of the said boorn-maneuvering intermediary pipe shaft (32) of a second connection arm (21c) downwardly protruding-ly provided on the pipe s~laft (21a) of the interlocking member (21) of the said first maneuvering lever (14). Fig. 5 shows this interlocking connection mode. This maneuvering combination mode is generally prevalling in the U.S. A.. As illustrated, it is possible to maneuver: the maneuveri.ng valve (V8) for boom ~-and-down rocking and the maneuvering valve (V3) for first con-~-luence for speed increasing thereof by means o~
~ ti'7~
maneuvering of one, namely the first, maneuvering lever (14) in the machine body back-and-forth direction, and the maneuvering valYe (Vl) for boom swiveling by means of maneuvering in the machine body transverse direction; and to maneuYer: to maneuver-ing valve (V2) ~or arm rocking by means of maneuvering the other, namely the second, maneuvering lever (15) in the machine body back-and-forth direction, and the maneuvering valve (V5) for buc-ket pivoting by means o~ maneuvering in the machine body trans-verse direction. ~s for other structures in Fig. 5, such are sub-stantially the same as the structures in Fig. 3, and description in detail thereof shall therefore be omitted.
Now, description is given, with reference to Fig. 3, Fig.
6 and Yig. 7, of a confluence maneuvering mechanism (37) capable of maneuvering the said maneuvering valve (V6) for second con-fluence, upon having maneuvered the maneuvering valve (V2) for arm rocking by means of the first maneuvering lever (14) in Fig.
3 and the maneuvering valve (V5) for bucket pivoting by means of the second rnaneuveringlever (15) either simultaneously or separa-tely individual]y, without suffering from interference therebe-tween. The confluence maneuvering mechanism (37) is constructed with: the said arm-maneuvering intermediary pipe shaft (31); the sa;d bucket-maneuvering intermediary pipe shaft (38); and an in-telmediary pipe shaft (41) for confluence maneuvering, rotatably provided in parallel with these pipe shafts ~6'73~
(31),(38), ~s shown in Fi~. 6~ o-n the said arm-maneuvering intermediary pipe shaft (31) and bucl~et-maneuvering inter-mediary pipe shaft (38) -there are consolidatedly pro~ided respective pairs of third and fourth connection arms (42);
(43),(44),(LI5) a.s spaced apart in the machine body transverse direction a:nd protr~ding down~ardly On. the said inter-mediary pipe shaft (41) for confluen.ce maneuvering there are respectively con.solidatedly provided - at the positions in the machine body transverse direction in substantially the same phase as the said connection arms (42)-(45) -s t a fi~t, a second, a third and a fourth connection arms(46),(47),(48),(49) to correspon.d in. pairs of two each, to the third and fourth connection arms (42),t43)~ (44),(45) of the in.termediary pipe shafts (31),(38), respectively;
with each one thereof (46),(48) extending upwardly and t:he other (47),(49) exten.ding downwardly; and on free en.d side of these conn.ection arms (46)-(49) there are provided pins (46a),(47a), (48a),(49a), respectively. ~t the connecting portions on one end side of push-pull rods (50),(51),(52), (53) for connection, adapted to engage with these pin.s (46a), (47a), (48~, (49a)~ there respectively are defined oblon.g open.in.gs (a); while portio.n.s on. the other end side thereof are respectively pivotally affixed to the third and fourth conn.ection arms (44), (45) o~ the said bucket-man.euvering intermediary pipe shaft (38) an.d to the third and fourth conn.ection arms (42), (43) o~ the said arm-7 3 ~ 8 maneuvering intermediary pipe shaft (31), Furthermore~
on the said confluence maneuverin.g intermediary pipe shaft (41) there is pro-trudingly provided a fifth connection. arm (54) e~tendin.g downwardlyS and a push-pull rod (55) inter-connects same and the said valve (V6) ~or second confluence ~s for the positional relationship of the said pins (46a), (47a)~(4~a)~(49a) relative to the respective oblong openings (a) of the said push-pull rods (50),(51),(52), (53), it is so made that the pins (46a),(48a) of the upwardly protrudin.gly provided first and third connection arms (46)~(48) are position.ed, when the said maneuvering valve (V1) for arm rocking and the said maneuvering valve (V5) for bucket pivoting are in the neutral posi-tion, at the end of the said respective oblong openings (a) on the side toward said both the maneuvering valves (V1),(V5), as shown in Fig, 6, while the pins (47a),(49a) of -the downwardly protrudingly provided second an.d fourth connection arms (47),(49) are positioned at the end of the said respective oblon.g openin.gs (a) on. the side toward the said first man.euverin.g lever (14) Therefore, when for instan.ce the first man.euverin.g lever (14) has been. maneuvered in pullin.g toward the machin.e body rear side for raisin.g the arm (10) an.d thus the said arm-maneuvering in.termediary pipe shaft (31) has been rotated via the said push-pull rod (~Oa), then the said push-pull rod (52) connected to this in.termediary pipe (313 pushes the said pin. (48a), and the said con.fluen.ce _ 19 _ 3~
maneuvering intermedi.-ary pipQ shaft t41) is rotatecl in counterclocl~wise rotation, whereby the secoDd confluence valve ~V6) is maneuvered via the fifth connection arm (54) ~t this time, the pin (46a) of the sai.d first connection arm (46) mal~es displacemen.t, as shown in Fig 7, only to the middle of the opening (a) of the said push-pull rod (50)~ and thus exerts no influence on this rod (50), Thus, it is possible to retain in the n.eutral position th.e said maneuverin.g valve (V5) for bucket pivoting which is man.euvered by the said push-pull rod (50) via the said bucket-man.euvering intermediary pi.pe shaft (38). In other words, the second maneuvering lever (15) suffers no inter-feren.ce from such m~n.euvering, With this construction, it is likewise apparen.t that the second man.euvering lever (15) and the said valve (V5) for bu.~ket pivoting su~fer n.o in.terference even. if the said ~irst man.euvering lever (14) is man.euvered in. the opposite direction, namely toward the machin.e body fron.t side. The con.fluence maneuverin.g mechan.ism (~7) thus gives play to its fun.ction as men.tion.ed hereinabove by the combination. of the positioning of the respective oblong openings (a) an.d the pin.s (46a),(47a), (48a),(49a) engagin.g therewith an.d the disposing of the protruding direction.s of the respective connection. arms.
Now, on. the interlocking mode change-over mechan.ism (30) to change over the in.terlockin.g relationship of the above-mention.ed two man.euverin.g levers and four ~3 ~7~3~8 manellvering valves, another form of the emhodiment is described in detail hereunder with reference to Fig. 8 - Fig. 13.
In constructing the maneuvering portion structure for the maneuvering valve (Vl) of the motor (M) for boom swiveling and the maneuver;ng valves (V8),(V2),(V5) for the boom cylinder, for the cylinder and for the bucket cylinder, it is made up, as shown in Fig. 8, by connecting the -two ]evers (14),(Z5) adapted to be maneuvered in bl-directional rocking abo~t axes (X),(Y), more spe-cifically to the maneuvering sections (Sl),(S2),(S3),(S4) thereof,rods (Bl),(B2),(B3),(B4) in juxtaposition extending in parallel to one anot~ler; and by engaging the valve (V2) to the rod (Bl), the swivel valve (Vl) to the rod (s2), the boom valve (V8) to the rod (B3) and thebucket valve (V5) to the rod (B4), in such state that the respective spools are in parallel to one another; to thus drive the swivel table (3) by the maneuvering of the first maneuvering lever (14) in the back-and-forth rocking relative to the operation seat (4), the arm (10) by the maneuvering of the first lever (14) in right--and-left rocking, the boom (8) by the maneuvering of the second lever (15) in back-and-forth rocking and the bucket (12) by the maneuvering of the second lever (15) in right-and-left rocking, respectively.
~onsideration is paid to make it possible to provide, Midway around the said rod interlocking systems, 7~8 the interloclcing mo-le change-over mechcmism (30) for altering the interlocking relationship of the levers (14)~ (15) and. the sliding spools for the valves In constructing the said interlocking ~ode change-over mechan.i.sm (30), it is made up, as shown in Fig, 9, by journaling, in brackets (62)~(63) for free rot~tion, two, namely a first and a seco.nd interloeking shafts (60), (61), havi:ng the axes made to exten.d in the juxtaposed arraying directi.on of the rocl. in.terlocking systems;
by fittingly putting a firs-t tubular body (64) on and around an intermediary portion of the first shaft (60) and a seeond ancl a third tubular bodies (65), (66) on and around the seeond shaft (61), respeetively in a mam~.er free to make relative rotation; by seeurely fixing -respeetively on. to the first tubular body (64) and the seeond tubular body (65) ~nd on the first shaft (60) ancl the third tubular body (66) - two sets of first interloeking deviees (67), (68) formed eaeh by pivotally bridging a link over two arms; an.d by seeurely fixing - respectively on to thé first shaft (60) and the first, seeon.cl and third tubular bodies (64),(65),(66) - seeond interloeking deviees (69),(70),(71),(72) formed eaeh by pivotally eonneeting a rod on an arm In altering the interloeking systems by means of the interloeking mode ehange-over meehanism (30) of the above-deseribed eonstruetion. in the rod interloeking systems 73~8 shown in. Fig. 8, it is possible to obtain rod în.terlocking systcms ~ff~will alter the maneuvering objects - more specifically the arm (10) ~nd the boom (8)by the man.euvering levers (14)~ (15) - by dismantling the rods (B1), (B3) ~nd by respectively pivotably conn.ecting~ as shown. in. Fig 10, the interlocking device (69) of the first shaft (60) with the maneuvering section. (Sl)~ the inter-locking device (70) of the first tubula.r body (64) with the maneuvering section. (S3), the interlocking device (71) of the second tubular body (65) with the man.euvering valve (V2), and the interlocking device (72) of the third tubular body (66) with the maneuvering valve (V8) Besides, it is possible to obtain. rod interlocking systems ~ will alter the man.euvering objects - more specifically the swivel table (3) aDd the bracket (12) - in the rod interlocking systems shown. in Fig 8, by disman.tling the rods (B2), (B~l) and inverting the interlocking shafts (60), (61) and futher by respectively pivotally con.n.ecting, as shown. in Fig 11~ the in.terlocking device (70) of the first tubular body (64) with the maneuvering section (S2), the interlocking device (69) of the first shaft (60) with the man.euvering section. (SL~), the in.terlocking device (72) of the third tubular body (66) with the man.euverin.g valve (Vl), and the interlocking device (71~ of the second tubular body (65) with the ma~euverin.g valve (V5) Still further, this in.terlocking mode change-over ~673 ~
mechanism (30) may be so made, as shown in Fig. 12, by disposing the fi.rst shaft (60~ in -the state as that of ~ig. 10 while as for the first tubular body (64), the second tubular bocly (65) and the third tubular body (66) commonly making -them move upwardly from the state as that of l?ig, 11 an.d rotatin~ them by 1~0 , ~thus to respectively interlockingly connect: the maneu~ering section (S1) of the maneuvering in the machine bod.y back-and-forth direction.
of the said first maneuvering lever (14) with the maneuvering valve (V1); the maneuvering section (S2) of -the maneuvering in the machin.e body transverse direction of the said first maneuvering lever (14) with the maneuvering valve (V2) the rod (B3), connected to the man.euvering section (S3) of the man.euvering in the machine body back-and-forth direction of the said second man.euvering lever (15), with the said maneuverin.g valve tV~) for boom up-an.d-down. rocking; and the rod (B4), conn.ected to the maneuvering section. (S4) of the man.euvering in the machine body tran.sverse direction.
of the said second man.euvering lever (15), with the said man.euvering valve (V5) for bucket pivoting Yet further, the said in.terlocking mod0 change-over mechan.ism (30) may as wéll be made in such construction, as shown in. Fig, 13, where the first shaft t60), the first tubular body (64), the second tubular body (65) and the third tubular body (66) are inverted from the state of Fig.
12, with the middle portion. of the first an.d the second 73~;8 e 7~0 ~ e shaf-ts (60), (61) as the inverslon center, ~ y, it is made possible to maneuve:r the said maneuvering valve (V2) for arm rocl~ing by means of the maneuvering of the first man.euvering lever (14) in the machine body lateral direction, and the said maneuvering valve (Vl) for boom swiveling by means of the maneuvering thereof in the machin.e body bac~-and-forth direction; and it is made possible to maneuver the said maneuvering valve (V8) for boom up-and-down rocking by means of the man.euvering of the second maneuvering lever (15) in the machine bo~y back-and-forth direction, and the said maneuvering valve (V5) for buc~et pivoting by mean.s of the maneuvering thereof in the machine body transverse ~irection.. ~ith provision as men.tion.ed hereinabove, thus for having in.terlocking rotation shafts interpose in the intcrlocking systems, which shafts are adapted for alterable in.terlocl~ing relationship with push-pull rods, in. such manner as to once transform, midway in. the interlocking systems, the lin.ear movements of the rods to rotation.al mov0men.ts and take out the rotation.al movements Erom the respective differen.t locations in. the rod justaposed arraying direction., and to restorin.gly transform the rotational movemen.ts back to the linear movemen.ts and tran.smit same to the valve spools~ and so forth; it is made possible, in. the case the give mode of the man.euverin.g is differen.t from the previously conversant man.euvering mode, to modify the given. mode to conform to such previous maneuvering r~3 3 9L I~3 mode, thus to bring forth the advan-tage of managing to properly use any different set of the machines safely with e~cellent work efficiency always retaining one and the same maneuvering sense with such provision of the versatile construction ready for alter-ing the maneuver;.ng mode upon any possihle need.
By the way, though it has been supposed to cause swivel-ing of the boom (8) by means of khe swiveling maneuvering of the swivel table (3), it is as well possible to provide a maneuvering valve for a cyli.nder rocking, either instead of the swivel valve (Vl), or else to provide a flow path change-over valve for such cylinder and the motor (M) for boom swiveling so as to have the valve (V~) dually serve also for causing the boom (8) to make rocking by means of the cylinder rocking.
As is clear from the above description, the maneuvering portion structure of an excavation work vehicle, according to this invention, can alter the maneuvering systems thereof in order to realize e~cavationwork without arroneous maneuvering and with-out lowering the work efficiency even by any operator and underany actual condition prevailing in the pertinent country, t]lUs hav-ing any different mode of the maneuvering as habit or custom, and is thus of -the tremendous advantage in the industrial application thereof.
This invention relatesto a control handle structure of an excayation work vehicle~ which connects a maneuvering valve for boom swiveling, a maneuvering valve for boom up-and-down rocking, a maneuveriny valve for arm rocklng and a maneuvering valve for bucket pivoting, interlockingly to two maneuvering ]e-vers adapted for free bi-directional rocking maneuvering, in a manner capable of separa-te individual maneuvering and capable of simultaneous maneuvering in respective pairs.
In order to maneuver, as easily and as efficiently as possible, a maneuvering valve forboom swiveling, a maneuvering valve for hoom up-and-down rocking, a maneuvering valve for arm rocking and a maneuvering valve for bucket pivoting, of an exca-vation work vehicle, a control handle structure is used that uses two maneuveri.ng levers adapted for free bi-directional rocking maneuvering, which are capable of maneuvering separately the individual valves and capable of maneuveri.ng simultaneously them in respective pairs.
As for the interlocking connection of the two maneuv-ering levers and the four maneuvering valves in conventional in-stances, a mode has been adopted, wherein one interlockingly con-nects respective pairs of the maneuvering valves each closely , interrelated as ~o the mancuvering, thus in two sets, and one respectively connects them simply to the said two maneuvering levers, via four interlocki.ng SySterQS comprising push-pull rods.
l~owever, as to -the interlockiny relationship between said two maneuvering 1evers and four maneuvering valves, namely as to which particular maneuvering valve and which particular rnan-euvering valve to in-terlockingly connect to which particular maneuvering lever, it is dirferent according to the custom pre-vailing in -the respective countries of the world and to the par-ticular manufacturers.
As is again referred to in detail in the later-described embodiment of this invention, it is generally the case that for instance in England they connect the maneuvering valve for boom up-and-down rocking and ~he maneuvering valve for bucket pivot-ing, interlockingly to one maneuveri.ng lever adapted for free bi-directi.onal rocking, and connect t]le maneuvering valve for arm rocking and the maneuvering valve for boom swiveli.ng, inter-lockingly to the other maneuvering lever adapted for free bi-directional rocking, while in the U.S. A. they connect the man-euvering valve for arm rocking and the maneuvering valve for buc-ket pivoting, interlockingly to One maneuvering lever, and con-nect the maneuvering valve for boom up-and-down rocking and the maneuvering valve for boom swiveling, interlockingly ~6, 348 the other maneuvering lever.
Besides, there are some manufacturers also in Japan who adopt such interlocking connection structure as to maneuver the maneuvering valve for boom swiveling by the maneuvering of one maneuvering lever in the machine body back-and-forth direction.
In order to satisfy such requirements of the re-spective countries, including Japan as well, various formsof the maneuvering structures must have separately been manufactured, and it has thus been quite uneconomical.
Furthermore work efficiency is reduced when an operator having experience with the system of a particular manufacturer is used to operate another system, due to the operator's fear of performing erroneous maneuvers.
In view of the above-mentioned prior art and of the recent requirements in the various countries, this invention has as its object to provide a control handle structure of an excavation work vehicle, capable of changing over the interlocking relationship between the two maneu-Yering levers and four maneuvering valves.
To attain this object, the control handle 73~8 structure of an excavation work vehicle, accordiny to this in~
vention~ is characteri~ed in that a maneuvering valve for boom swiveling, a maneuvering valve for boom up-and-down rocking, a maneuvering valve for arm rocking and a maneuvering valve for bucket pivoting are disposed suhstantially in parallel that these four maneuvering valves are interlockingly connected, in a manner capable of separate individual rnaneuvering and capable of simultaneous maneuvering in respective pairs, via four inter-locking systems parallel with one another usi.ng the respective push-pull rods, to two maneuvering levers adapted for free rock-ing maneuvering crosswise in back-and-forth and right-and-left directions of the machine body; and that there is provi.ded, in-termediary to the said interlocking systems, an interlocking mode change-over mechanism for changing the mode of the interloc-king between the two maneuvering levers and the said four maneu-vering valves.
It is therefore possible to interlockingly connect the two maneuvering levers adapted for free rocking crosswise in back-and-forth and right-and-left directions of the machine body and the maneuvering valve for hoom swiveling, maneuvering valve for boom up-and-down rocki.ng, maneuvering valve for arm rocking and maneuvering valve for bucket pivoting, in any com-bination therebetween as to conform to the custom or the actual state as is prevailing in the respective /
countries in which they use the excavation work vehicle. This results in bringing forth the advantage, by the maneuvering por-tion structure of this invention, of inexpensively providiny the excavation work vehicle without manufacturing various specific forms of maneuvering portion struc-ture.
It is also possible, in the case there is any specific mode of the maneuvering lever system with which the operator is well acquainted and experienced, to change over into such mode of the maneuvering lever system properly suited to the operator, thus resulting as well in bringing forth the advantage of enhanc-ing the work efficiency and of promoting the safety, by the con-versant maneuvering sense.
The second object of this invention is to have, when the rnaneuvering valve for boom up-and-down rocking wllich con-trols oil of a first oil hydraulic pump is maneuvered, oil of a second oil nydraulic pump make confluence with the oil of the first oilhydraulic pump, thus to have the up-and-down rocking speed of the said boom get speed raising, and for this purpose there is provided a maneuvering valve for first confluellce and it is interlockingly connected to the said maneuvering valve for boom up-and-down rocking in a manner capable of simultaneous ma-neuvering therewith.
Furthermore, the third object of this invention '3 ~3 is to make, when the said maneuverillg valve for boom up-and~down rocking is not in use, the oil of the first oilhydraulic pump con-fluence with the oil of the second oilhydraulic pump, thus to have the actuation speed of the arm rocking or the bucket pivot-ing or e]se both of t:hem get speed raising, and for -this puxpose there is provided a maneuvering valve for second confluence, to be maneuvered in interlocking with push-pull actuation of the maneuvering valve for bucket pivoting or t-he maneuvering valve for arm rocking, in juxtaposition of the said respective maneu-vering valves via a confluence maneuvering mechanism.
Other objects and advantages of this invent;on wi]l be-come clear from the description of the specific embodiment to follow hereunder and the showing of the accompanying drawings.
The drawings show, by way of example, the best mode of the embodiment of the control handle structure of an excavation work vehicle, according to this invention, wherein:
Fig. 1 is a side elevation of the excavation work ve-hicle;
Fig. 2 is a diagram of the oilhydraulic circuit of the excavation work vehicle;
Fig. 3 is a schematic perspective view of the control handle structure;
Fig. ~ is a view showillg a portion of interlocking mode change-over mechanism partly cut away and partly in section;
Fig. 5 is a schematic perspective view of the control handle structure, showing a state for interlocking relationship 73'~
as has been changed over;
Fig. 6 is a schematic perspective view showing conflu-ence maneuvering mechanism;
s Fig. 7 is a schemati,c perspective view of the confluence maneuvering mechamism, showing the state of maneuvering same;
Fig. 8 is a schematic vi,ew showing interlocking rela-tionship of another maneuvering section;
Fig. 9 is a schematic perspective view showing the con-trol handle structure of Fig. 8;
Fig. 10 is a plan view of the control handle structure of Fig. 8, for interlocking relationship as has been changed over;
Fig. 11 is a plan view of the control handle structure of Fig. 8, for in-terlocking relationship as has been changed over;
Fig. 12 is a plan view of the control handle structure of Fig. 8, for interlocking relationship as has been further chan-ged over; and Fig. 13 is a plan view of the control handle structure of Fig. 8, for interlocking relationship as has been further changed over.
~.
~ J~8 This invell-ti.on is now explained in more detail hereunder with reference to the accornpanying drawings.
~i~. 1 shows a shoveling work vehicle as a specific example of an excavati.on work ~ehicle of thls invention. This shoveling work vehicle is provided with a swivel tah]e (3) as attached to the machine body (2) equipped with crawler travel ap-paratus (1~, for free pivotal maneuvering about an upright axis, and on this swivel tab]e (3~ further with an operation cab (4) and a prime mover cab as are mounted there as well as an excava-tion work apparatus (5). In constructing the excavation work ap-paratus (5) r one provides a boom (8) free to rock about a per-pendicular axis relative to a bracket (7) uprightly provided on the said swivel table (3), connects to a tip end of the said boom (8) an arm (10) with a bucket(12) connected at a tip end thereof., and provides: a fluid pressure cylinder (9) for rocking up and down the said boom (8) relative to the said bracket (7); a fluid pressure cylinder (11) for expansively and retractively rocking the said arm (10) about a perpendicular axis relative to the said boom (8); and a fluid pressure cylinder (13) for making the said bucket (12) pivot about a perpendicular axis relative to the said arm (10).
~6 ,~3 ?~8 In cons-tructing the fluid pressure driving system, as shown in Fig. 2, a maneuvering valve (Vl) for a fluid pressure motor (M) for swiyel kable driYing in order to swivel the said hoom (8) by the piYoting of the said swiYel table (3), a maneu-vering valve (V2) for the cylinder (11) for arm rocking, a maneu-vering valYe (V3) for first confluence for increasing boom rais-ing speed, a maneuYering valve (V4) for a fluid pressure motor (Ml) for a travel apparatus of one of the right and left crawlers, and a maneuvering valve (V5) for -the said cylinder (13) for buck-et pivoting are constructed in a stack valve type provided with a center bypassing flow path and are parallely connected to a first fluid pressure pump (Pl). A maneuvering vlave (V8) for the said cylinder (9) for boom up-and-down rocki.ng, a maneuvering valve (V7) for a fluid pressure motor (M2) for a travel apparatus oE the other of the right and left crawlers, and a maneuvering valve (V6) for second confluence for causing the said arm (10) and bucket (12) -to increase speed are similarly constructed in a stack valve type provided with a center bypassing flow path and are parallelly connected to a second flui.d pressure pump (P2).
As shown in Fig. 3, the said maneuvering valves (Vl) -(V8) are disposed in juxtaposition in the machine body transverse direction, with the respective sliding spools (not shown) in the state of extendi.ng in the i7;~
machine body back-and-fortil direction. Two, namely a first and a second, maneuvering ].evers (14~ (15) adapted for free rocking maneuvering crosswise or bi-directionally in the machine body back-and-forth and right-alld-left directions for maneuvering the said maneuvering valves (Vl), (V2), (V3), (V6), (V8) are provided in juxtaposition in the machine body transverse direction in front of these maneuvering valves. Two, namely a third and a fourth "naneuvering levers (16),(17) adapted for free rocking maneuvering in the machine body back-and-forth direction for maneuvering the said maneuvering valves (V4),(V7) are provided in justaposition inthemachine body -transverse direction in between the said crosswisely rocking maneuvering levers (14),(15).
The maneuvering combination mode of the said four man-euvering levers (14),(15),(16),(17) and the said ei~ht maneuvering lves (Vl)~(V2)~(V3)~(V4)~(V5)~(V6),(V7),(V8)~ to be described in detail hereunder, is the mode adopted mainly in England and so forth.
The said first maneuvering lever (14) and the said ma-neuvering va].ve (Vl) for boom swiveling are inter]ockingly con-nected to each other by means of a first i.nterlocking system (Rl) comprising a push-pull rod (18) via an interlocking member (19) so adapted that the sliding spool ( not shown) of the valve may be maneuvered in push-pull manner by the maneuvering of the said first maneuvering lever (14) i.n t-he machine transverse direction.
. ~. .~.
1~7~
The said first maneuvering lever (14) and the said maneuvering valve (V2) for arm rocking are interlockingly connected to each other by means of a second interlocking system (R2) comprising push-pull rods (20a),(20b) via an interlocking mem~er (2l) so adapted that the sLiding spool (not shown). of the valve may be maneuvered in the inachine body back-and-forth direction. The said third maneuvering lever (16) is interlockingly connected, by means of a third interlocking system (R3) comprising a push-pull rod (22) via an interlocking member (23) adapted for maneu-vering in push--pull manner the sliding spool (not shown) of the said maneuvering valve (V4) of the fluid pressure motor (~1) for the crawler travel apparatus on the left side, thus to the said maneuvering valve (V4). lrhe said fourth maneuvering lever (17) is interlockingly connected, by means of a fourth interlocking system (R4) comprisi.ng a push-pull rod (24) via an interlocking member (25) adapted for maneuvering in push-pull manner the s].iding spool (not shown) of the said maneuvering valve (V7) of the fluid pressure motor (M2) for the crawler travel apparatus on the right side, thus to the said maneuveri.ng valve (V7). The said second .naneuvering lever (15) is interlockingly connected, by means of a fifth interlocking system (R5) compri.sing push-pull rods (26a), (26b), via an interlocking member (27), to maneuver in push-pull manner, by the maneuvering thereof in the machine body transverse . .
~ti'73 ~3 direction, the sliding spool (not shown) of the said maneuvering valye (V5) for bucket plvoting, thus to the valve.
Furthermore, the said second maneuYering leYer (15) is interlockingly connected, by means of a sixth lnterlocking sys-tem (R6) comprising push-pull rods (28a),(28b~,(28c),(28d) and a con-nection rod (28e~ connecting the rods (28c),(28d), via an inter-locking member ~291, to maneuver in push-pull manner, by the maneuvering thereof in the machine body back-and-forth direction, lQ the respective sliding spools (not shown) of the said maneuvering valve (V8) for boom up-and-down rocking and the said maneuvering valve (V3) for first confluence for increasing boom rocking speed, thus to both the said valves (V8),(V3).
Midway between the said second maneuvering lever (15) and maneuvering valve (V5) for bucket pivoting there is rotatably provided a bucket-maneuvering intermediary pipe shaft (38) with its axis directed in the machine body transverse direction. On this intermediary pipe shaft (38) there is downwardly protruding-ly provided a first connection arm (39) for connecting the said push-pull rod (26b) to the sliding spool (not shown) of the said maneuvering valve (V5), with one end of the said push-pull rod (26b) rockably pivoted on tip end portion thereof.
2S Furthermore, in order to rockably connect the 73~8 said push-pull rod (26a) to a connection arm (27b) down-ward.ly protrudingly provided on. a pipe shaft (27a) of an interlocking member (27) adapted to pivot the said bucket-man.euvering intermediary pipe shaft (38) by the maneuvering of the said secon.d maneuvering lever (15) in the machine body lateral direction., there is downwardly protrudingly provided on. the said in.termediary pipe shaft (38) a second conn.ection. arm (~0), ~leans for conn.ectin.g the said respective push-pull rods (26a),(26b) and the respective first and secon.d conn.ection arms (39),(40), an.d the rod (26b) and the said conn.ection arm (27b), will become clear at the description. t oxpl~ ror~- of Fig, 4, to be given. hereinafter, ~lidway aroun.cl the said second interlockin.g system (R2) an.d sixth in.terlocking system (R6) between the said first an.d secon.d man.euverin.g levers (lL~),(15) ~md both the said maneuvering valves (V2),(V8), there is provided an in.terlocking mode change-over mechan.ism (30) adapted to change over the modes of the respective interlocking relation.ships.
As this in.terlocking mode change-over mechanism (30), an. arm-maneuverin.g in.termediary pipe shaft (31) an.d a boom-man.euv0ring in.termediary pipe shaft (32) are rotatably provided in. parallel to each other, more particularly these in.termediary pipe shafts (31),(32) are so disposed that their rotation. axes extend in the direction.normal to the mar.euvering direction. of the said respective juxtaposed ~6~73~3 push-pull rods (20a) 7 ( 28a) of the second interlocking system (.R2) and the sixth interlocking system (R6). Now, on. the said arm-man.euvering in.termediary pipe shaft (31) there are protrudingly provided in one a.n.d the same direction., namely both downwardly a first conn.ection arm (33) for connectin.g the push-pull rod (20a) of the said second in.ter-locking system (Rz), made releasable and remoun.table, interlockingly with the said first man.euvering lever (14~;
and a second conn.ection. arm (34) for enablin.g its interlock-ing connection with the said second man.euverin.g lever (15) by modifyingly remounting thc said releasable and remountable push-pull rod (20a).
On. the other hand, on the said boom-maneuvering in.termediary pipe shaft (32) there are protrudingly provided in. on.e an.d the same direction., namely both downwardly: a first conn.ection. arm (35) for conn.ecting the push-pull rod (28a) of the said sixth in.terlocking system (R6), made releasable and remoun.table, in.terlockingly with th0 said secon.d maneuverin.g lever (15); and a second connection arm (36) for com~.ecting same in.terlockin.gly with the said first man.euverin.g lever (14). At the tip end portion of the first conn.ection. arm (33) of the said arm-man.euvering in.termediary pipe shaft (31) there is pivotally attached, as shown in.
Fig. 4, a conn.ection. member (33a), screw bores being *hreaded in. both en.d portion.s of this connection. member (33a) and the said push-pull rods (20a),(20b) being respectively 3~3 screwecl into these screw borcs. ~ connection member (36a) o~ thc- structur~ the same as thi.s connectioD membcr (33a) is pivotally attaclled to the ti.p~3 end portion of the second connect.ion arm (36) of the said boom-maneuvering intermediary pipe sha:ft (32) 0n the other hancl., on a :Eirst connection arm (21b) downward.ly protrudingly provided on a pipe shaft (21a) forming a part of the interlocking member (21) o:E the said first maneuvering lever (14) there is pivotally attachecl a yoke (21c~ at the tip end thereof, a.nd to this yoke (21c) there is screwin.gly attached the other end of the said push-pull rod (20a), Thus, the said push-pull rod (20a) is releasable from and remountabl.e to both the said connection arms (33), (Z1b), The reason why -the in.termediary portion of the said push-pull rod (20a) is ~ Fig, 3~arcuate is to make this rod (20a) - when modifyingly remounted, for interloclcing interconn.ection of the secon.d conn.ection arm (34) of the said arm-man.euverin.g in.termediary pipe shaft (31) and the said secon.d man.euvering lever (15), to bridge between a connection. arm (29b), downwardly protrudingly provided on a pipe shaft (29a) forming a part of the in.terlocking member of this lever (15),an.d the said second conn.ection. arm (34~
- n.o-t to abut again.st the first conn.ection. arm (35) of the said boom-man.euvering intermediary pipe shaft (32) (see Fig, 5~.
By means of the above--menti.oned ;nterlocking mode change-over mechani.sm (30~, it is possible to change over the maneuver-ing of the said maneuvering valve (V2) for arm rocking, from the first maneuvering le-ver (14) to the second maneuvering lever (15), simply by altering the mounting posi.ti.on of the said push-pull rod (20a). Likewise, it is possible to change over the maneu-vering of the said maneuvering valve (V8) for boom up-and-down rocking and of the said maneuvering valve (V3) for fjrst conflu-ence, from the said second maneuvering lever (15) ~o the said first maneuvering lever (14), simply by altering the mounting state of another push-pull rod (28a) from the state of connecting the fi.rst connection arm (35) of the said boom-maneuvering inter-mediary pipe shaEt (32) and the connection arm (29b) of the said second maneuvering lever (15) to the state of connecting the second con-nection arm (36) of the said boorn-maneuvering intermediary pipe shaft (32) of a second connection arm (21c) downwardly protruding-ly provided on the pipe s~laft (21a) of the interlocking member (21) of the said first maneuvering lever (14). Fig. 5 shows this interlocking connection mode. This maneuvering combination mode is generally prevalling in the U.S. A.. As illustrated, it is possible to maneuver: the maneuveri.ng valve (V8) for boom ~-and-down rocking and the maneuvering valve (V3) for first con-~-luence for speed increasing thereof by means o~
~ ti'7~
maneuvering of one, namely the first, maneuvering lever (14) in the machine body back-and-forth direction, and the maneuvering valYe (Vl) for boom swiveling by means of maneuvering in the machine body transverse direction; and to maneuYer: to maneuver-ing valve (V2) ~or arm rocking by means of maneuvering the other, namely the second, maneuvering lever (15) in the machine body back-and-forth direction, and the maneuvering valve (V5) for buc-ket pivoting by means o~ maneuvering in the machine body trans-verse direction. ~s for other structures in Fig. 5, such are sub-stantially the same as the structures in Fig. 3, and description in detail thereof shall therefore be omitted.
Now, description is given, with reference to Fig. 3, Fig.
6 and Yig. 7, of a confluence maneuvering mechanism (37) capable of maneuvering the said maneuvering valve (V6) for second con-fluence, upon having maneuvered the maneuvering valve (V2) for arm rocking by means of the first maneuvering lever (14) in Fig.
3 and the maneuvering valve (V5) for bucket pivoting by means of the second rnaneuveringlever (15) either simultaneously or separa-tely individual]y, without suffering from interference therebe-tween. The confluence maneuvering mechanism (37) is constructed with: the said arm-maneuvering intermediary pipe shaft (31); the sa;d bucket-maneuvering intermediary pipe shaft (38); and an in-telmediary pipe shaft (41) for confluence maneuvering, rotatably provided in parallel with these pipe shafts ~6'73~
(31),(38), ~s shown in Fi~. 6~ o-n the said arm-maneuvering intermediary pipe shaft (31) and bucl~et-maneuvering inter-mediary pipe shaft (38) -there are consolidatedly pro~ided respective pairs of third and fourth connection arms (42);
(43),(44),(LI5) a.s spaced apart in the machine body transverse direction a:nd protr~ding down~ardly On. the said inter-mediary pipe shaft (41) for confluen.ce maneuvering there are respectively con.solidatedly provided - at the positions in the machine body transverse direction in substantially the same phase as the said connection arms (42)-(45) -s t a fi~t, a second, a third and a fourth connection arms(46),(47),(48),(49) to correspon.d in. pairs of two each, to the third and fourth connection arms (42),t43)~ (44),(45) of the in.termediary pipe shafts (31),(38), respectively;
with each one thereof (46),(48) extending upwardly and t:he other (47),(49) exten.ding downwardly; and on free en.d side of these conn.ection arms (46)-(49) there are provided pins (46a),(47a), (48a),(49a), respectively. ~t the connecting portions on one end side of push-pull rods (50),(51),(52), (53) for connection, adapted to engage with these pin.s (46a), (47a), (48~, (49a)~ there respectively are defined oblon.g open.in.gs (a); while portio.n.s on. the other end side thereof are respectively pivotally affixed to the third and fourth conn.ection arms (44), (45) o~ the said bucket-man.euvering intermediary pipe shaft (38) an.d to the third and fourth conn.ection arms (42), (43) o~ the said arm-7 3 ~ 8 maneuvering intermediary pipe shaft (31), Furthermore~
on the said confluence maneuverin.g intermediary pipe shaft (41) there is pro-trudingly provided a fifth connection. arm (54) e~tendin.g downwardlyS and a push-pull rod (55) inter-connects same and the said valve (V6) ~or second confluence ~s for the positional relationship of the said pins (46a), (47a)~(4~a)~(49a) relative to the respective oblong openings (a) of the said push-pull rods (50),(51),(52), (53), it is so made that the pins (46a),(48a) of the upwardly protrudin.gly provided first and third connection arms (46)~(48) are position.ed, when the said maneuvering valve (V1) for arm rocking and the said maneuvering valve (V5) for bucket pivoting are in the neutral posi-tion, at the end of the said respective oblong openings (a) on the side toward said both the maneuvering valves (V1),(V5), as shown in Fig, 6, while the pins (47a),(49a) of -the downwardly protrudingly provided second an.d fourth connection arms (47),(49) are positioned at the end of the said respective oblon.g openin.gs (a) on. the side toward the said first man.euverin.g lever (14) Therefore, when for instan.ce the first man.euverin.g lever (14) has been. maneuvered in pullin.g toward the machin.e body rear side for raisin.g the arm (10) an.d thus the said arm-maneuvering in.termediary pipe shaft (31) has been rotated via the said push-pull rod (~Oa), then the said push-pull rod (52) connected to this in.termediary pipe (313 pushes the said pin. (48a), and the said con.fluen.ce _ 19 _ 3~
maneuvering intermedi.-ary pipQ shaft t41) is rotatecl in counterclocl~wise rotation, whereby the secoDd confluence valve ~V6) is maneuvered via the fifth connection arm (54) ~t this time, the pin (46a) of the sai.d first connection arm (46) mal~es displacemen.t, as shown in Fig 7, only to the middle of the opening (a) of the said push-pull rod (50)~ and thus exerts no influence on this rod (50), Thus, it is possible to retain in the n.eutral position th.e said maneuverin.g valve (V5) for bucket pivoting which is man.euvered by the said push-pull rod (50) via the said bucket-man.euvering intermediary pi.pe shaft (38). In other words, the second maneuvering lever (15) suffers no inter-feren.ce from such m~n.euvering, With this construction, it is likewise apparen.t that the second man.euvering lever (15) and the said valve (V5) for bu.~ket pivoting su~fer n.o in.terference even. if the said ~irst man.euvering lever (14) is man.euvered in. the opposite direction, namely toward the machin.e body fron.t side. The con.fluence maneuverin.g mechan.ism (~7) thus gives play to its fun.ction as men.tion.ed hereinabove by the combination. of the positioning of the respective oblong openings (a) an.d the pin.s (46a),(47a), (48a),(49a) engagin.g therewith an.d the disposing of the protruding direction.s of the respective connection. arms.
Now, on. the interlocking mode change-over mechan.ism (30) to change over the in.terlockin.g relationship of the above-mention.ed two man.euverin.g levers and four ~3 ~7~3~8 manellvering valves, another form of the emhodiment is described in detail hereunder with reference to Fig. 8 - Fig. 13.
In constructing the maneuvering portion structure for the maneuvering valve (Vl) of the motor (M) for boom swiveling and the maneuver;ng valves (V8),(V2),(V5) for the boom cylinder, for the cylinder and for the bucket cylinder, it is made up, as shown in Fig. 8, by connecting the -two ]evers (14),(Z5) adapted to be maneuvered in bl-directional rocking abo~t axes (X),(Y), more spe-cifically to the maneuvering sections (Sl),(S2),(S3),(S4) thereof,rods (Bl),(B2),(B3),(B4) in juxtaposition extending in parallel to one anot~ler; and by engaging the valve (V2) to the rod (Bl), the swivel valve (Vl) to the rod (s2), the boom valve (V8) to the rod (B3) and thebucket valve (V5) to the rod (B4), in such state that the respective spools are in parallel to one another; to thus drive the swivel table (3) by the maneuvering of the first maneuvering lever (14) in the back-and-forth rocking relative to the operation seat (4), the arm (10) by the maneuvering of the first lever (14) in right--and-left rocking, the boom (8) by the maneuvering of the second lever (15) in back-and-forth rocking and the bucket (12) by the maneuvering of the second lever (15) in right-and-left rocking, respectively.
~onsideration is paid to make it possible to provide, Midway around the said rod interlocking systems, 7~8 the interloclcing mo-le change-over mechcmism (30) for altering the interlocking relationship of the levers (14)~ (15) and. the sliding spools for the valves In constructing the said interlocking ~ode change-over mechan.i.sm (30), it is made up, as shown in Fig, 9, by journaling, in brackets (62)~(63) for free rot~tion, two, namely a first and a seco.nd interloeking shafts (60), (61), havi:ng the axes made to exten.d in the juxtaposed arraying directi.on of the rocl. in.terlocking systems;
by fittingly putting a firs-t tubular body (64) on and around an intermediary portion of the first shaft (60) and a seeond ancl a third tubular bodies (65), (66) on and around the seeond shaft (61), respeetively in a mam~.er free to make relative rotation; by seeurely fixing -respeetively on. to the first tubular body (64) and the seeond tubular body (65) ~nd on the first shaft (60) ancl the third tubular body (66) - two sets of first interloeking deviees (67), (68) formed eaeh by pivotally bridging a link over two arms; an.d by seeurely fixing - respectively on to thé first shaft (60) and the first, seeon.cl and third tubular bodies (64),(65),(66) - seeond interloeking deviees (69),(70),(71),(72) formed eaeh by pivotally eonneeting a rod on an arm In altering the interloeking systems by means of the interloeking mode ehange-over meehanism (30) of the above-deseribed eonstruetion. in the rod interloeking systems 73~8 shown in. Fig. 8, it is possible to obtain rod în.terlocking systcms ~ff~will alter the maneuvering objects - more specifically the arm (10) ~nd the boom (8)by the man.euvering levers (14)~ (15) - by dismantling the rods (B1), (B3) ~nd by respectively pivotably conn.ecting~ as shown. in. Fig 10, the interlocking device (69) of the first shaft (60) with the maneuvering section. (Sl)~ the inter-locking device (70) of the first tubula.r body (64) with the maneuvering section. (S3), the interlocking device (71) of the second tubular body (65) with the man.euvering valve (V2), and the interlocking device (72) of the third tubular body (66) with the maneuvering valve (V8) Besides, it is possible to obtain. rod interlocking systems ~ will alter the man.euvering objects - more specifically the swivel table (3) aDd the bracket (12) - in the rod interlocking systems shown. in Fig 8, by disman.tling the rods (B2), (B~l) and inverting the interlocking shafts (60), (61) and futher by respectively pivotally con.n.ecting, as shown. in Fig 11~ the in.terlocking device (70) of the first tubular body (64) with the maneuvering section (S2), the interlocking device (69) of the first shaft (60) with the man.euvering section. (SL~), the in.terlocking device (72) of the third tubular body (66) with the man.euverin.g valve (Vl), and the interlocking device (71~ of the second tubular body (65) with the ma~euverin.g valve (V5) Still further, this in.terlocking mode change-over ~673 ~
mechanism (30) may be so made, as shown in Fig. 12, by disposing the fi.rst shaft (60~ in -the state as that of ~ig. 10 while as for the first tubular body (64), the second tubular bocly (65) and the third tubular body (66) commonly making -them move upwardly from the state as that of l?ig, 11 an.d rotatin~ them by 1~0 , ~thus to respectively interlockingly connect: the maneu~ering section (S1) of the maneuvering in the machine bod.y back-and-forth direction.
of the said first maneuvering lever (14) with the maneuvering valve (V1); the maneuvering section (S2) of -the maneuvering in the machin.e body transverse direction of the said first maneuvering lever (14) with the maneuvering valve (V2) the rod (B3), connected to the man.euvering section (S3) of the man.euvering in the machine body back-and-forth direction of the said second man.euvering lever (15), with the said maneuverin.g valve tV~) for boom up-an.d-down. rocking; and the rod (B4), conn.ected to the maneuvering section. (S4) of the man.euvering in the machine body tran.sverse direction.
of the said second man.euvering lever (15), with the said man.euvering valve (V5) for bucket pivoting Yet further, the said in.terlocking mod0 change-over mechan.ism (30) may as wéll be made in such construction, as shown in. Fig, 13, where the first shaft t60), the first tubular body (64), the second tubular body (65) and the third tubular body (66) are inverted from the state of Fig.
12, with the middle portion. of the first an.d the second 73~;8 e 7~0 ~ e shaf-ts (60), (61) as the inverslon center, ~ y, it is made possible to maneuve:r the said maneuvering valve (V2) for arm rocl~ing by means of the maneuvering of the first man.euvering lever (14) in the machine body lateral direction, and the said maneuvering valve (Vl) for boom swiveling by means of the maneuvering thereof in the machin.e body bac~-and-forth direction; and it is made possible to maneuver the said maneuvering valve (V8) for boom up-and-down rocking by means of the man.euvering of the second maneuvering lever (15) in the machine bo~y back-and-forth direction, and the said maneuvering valve (V5) for buc~et pivoting by mean.s of the maneuvering thereof in the machine body transverse ~irection.. ~ith provision as men.tion.ed hereinabove, thus for having in.terlocking rotation shafts interpose in the intcrlocking systems, which shafts are adapted for alterable in.terlocl~ing relationship with push-pull rods, in. such manner as to once transform, midway in. the interlocking systems, the lin.ear movements of the rods to rotation.al mov0men.ts and take out the rotation.al movements Erom the respective differen.t locations in. the rod justaposed arraying direction., and to restorin.gly transform the rotational movemen.ts back to the linear movemen.ts and tran.smit same to the valve spools~ and so forth; it is made possible, in. the case the give mode of the man.euverin.g is differen.t from the previously conversant man.euvering mode, to modify the given. mode to conform to such previous maneuvering r~3 3 9L I~3 mode, thus to bring forth the advan-tage of managing to properly use any different set of the machines safely with e~cellent work efficiency always retaining one and the same maneuvering sense with such provision of the versatile construction ready for alter-ing the maneuver;.ng mode upon any possihle need.
By the way, though it has been supposed to cause swivel-ing of the boom (8) by means of khe swiveling maneuvering of the swivel table (3), it is as well possible to provide a maneuvering valve for a cyli.nder rocking, either instead of the swivel valve (Vl), or else to provide a flow path change-over valve for such cylinder and the motor (M) for boom swiveling so as to have the valve (V~) dually serve also for causing the boom (8) to make rocking by means of the cylinder rocking.
As is clear from the above description, the maneuvering portion structure of an excavation work vehicle, according to this invention, can alter the maneuvering systems thereof in order to realize e~cavationwork without arroneous maneuvering and with-out lowering the work efficiency even by any operator and underany actual condition prevailing in the pertinent country, t]lUs hav-ing any different mode of the maneuvering as habit or custom, and is thus of -the tremendous advantage in the industrial application thereof.
Claims (8)
1. A control handle structure of an excavation work vehicle, in which a maneuvering valve for boom swiveling, a maneuvering valve for boom up-and-down rocking, a maneuvering valve for arm rocking and a maneuvering valve for bucket pivoting are disposed substantially in parallel; the four maneuvering valves are interlockingly connected, in a manner capable of separate individual maneuvering and capable of simultaneous maneuvering in respective pairs, via first, second, third and fourth interlocking systems, parallel with one another using respective push-pull rods, to two maneu-vering levers adapted for free rocking, bi-directional man-euvering in back-and-forth and right-and-left directions of the vehicle, that there is provided, intermediary of the two interlocking systems, an interlocking mode change-over machanism for changing the mode of the interlocking between said two maneuvering levers and said four maneuvering valves, the interlocking mode change-over mechanism connects the maneuvering valve for boom swiveling and maneuvering valve for arm rocking interlockingly with said one maneuvering lever and connects the maneuvering valve for boom up-and-down rocking and said maneuvering valve for bucket pivoting inter-lockingly with the said other maneuvering lever; that the interlocking mode change-over mechanism connects the maneuvering valve for boom swiveling and maneuvering valve for boom up-and-down rocking interlockingly with said one maneuvering lever and connects the maneuvering valve for arm rocking and said maneuvering valve for bucket pivoting interlockingly with said other maneuvering lever;
in the interlocking mode change-over mechanism there is rotatably provided an arm-maneuvering intermediary pipe shaft and a boom-maneuvering intermediary pipe shaft, these intermediary pipe shafts, being disposed with their rotation axes extending in the direction normal to the maneuvering direction of respective juxtaposed push-pull rods of the third interlocking system, and the second interlocking system that on the arm-maneuvering intermediary pipe-shaft there are protrudingly provided in the same direciton a first connection arm, for connecting a partial member, made releasable and remountable, out of push-pull rods, of the third interlocking system No. 2, interlockingly with the one maneuvering lever and a second connection arm, for connecting the releasable and remountable push-pull rod interlockingly with the said other maneuvering lever, and that on the said boom-man-euvering intermediary pipe shaft there are protrudingly provided in the same direction a first connection arm, for connecting a releasable and remountable push-pull rod of the second interlocking system, interlockingly with the one maneuvering lever, and a second connection arm, for connecting interlockingly with the other maneuvering lever.
in the interlocking mode change-over mechanism there is rotatably provided an arm-maneuvering intermediary pipe shaft and a boom-maneuvering intermediary pipe shaft, these intermediary pipe shafts, being disposed with their rotation axes extending in the direction normal to the maneuvering direction of respective juxtaposed push-pull rods of the third interlocking system, and the second interlocking system that on the arm-maneuvering intermediary pipe-shaft there are protrudingly provided in the same direciton a first connection arm, for connecting a partial member, made releasable and remountable, out of push-pull rods, of the third interlocking system No. 2, interlockingly with the one maneuvering lever and a second connection arm, for connecting the releasable and remountable push-pull rod interlockingly with the said other maneuvering lever, and that on the said boom-man-euvering intermediary pipe shaft there are protrudingly provided in the same direction a first connection arm, for connecting a releasable and remountable push-pull rod of the second interlocking system, interlockingly with the one maneuvering lever, and a second connection arm, for connecting interlockingly with the other maneuvering lever.
2. The structure recited in claim 1, in which the valve for boom up-and-down rocking controls oil of a second fluid pressure pump; that the maneuvering valve for boom swiveling, the maneuvering valve for arm rocking and the maneuvering valve for bucket pivoting are so interconnected by parallel circuits and a center bypassing circuit as to be capable of simultaneous driving and are constructed to con-trol oil of a first fluid pressure pump; that a maneuvering valve, controlling oil of the said second fluid pressure pump for first confluence in order to increase boom raising speed, is in a circuit parallel to the maneuvering valve for boom swiveling, maneuvering valve for arm rocking and maneuvering valve for bucket pivoting, in juxtaposition thereto, and is connected by means of a connecting rod, interlockingly with said maneuvering valve for boom up-and down rocking, via the respective push-pull rods, in order to have the oil of the said second fluid pressure pump make confluence with the oil of the first fluid pressure pump thus for increasing the boom actuating speed; and that the connecting rod is connected to the said push-pull rod of the second interlocking system.
3. The structure recited in claim 2, in which a maneuvering valve for second confluence, connected to the maneuvering valve for boom up-and-down rocking by means of a parallel circuit and a center bypass circuit, is provided in juxtaposition therto, this maneuvering valve being so constructed as to have the oil of the first fluid pressure pump make confluence, by means of the center bypass circuit thereof when the said maneuvering valve for boom up-and-down rocking is in the neutral position, with the oil of the second fluid pressure pum thus for increasing the rocking speed of the arm and the pivoting speed of the bucket; and that there is provided a confluence maneuvering mechanism capable of maneuvering the maneuvering valve for second con-fluence always into the actuated state defining oblong openings at the respective tip end portions; that on the bucket-maneuvering intermediary pipe shaft there are protrud-ingly provided, in the same direction as a first and a second connection arms provided hereon, a third connection arm and a fourth connection arm, defining oblong openings at the respective tip end portions; that on the pipe shaft for con-fluence maneuvering there are provided, in the portions corresponding to said third and fourth connection arms of the two intermediary pipe shafts, a first through a fourth connection arms out of those first through fourth connection arms the first connection arm corresponding to the third connection arm of the bucket-maneuvering intermediary pipe shaft and the second connection arm corresponding to the third connection arm of the arm-maneuvering intermediary pipe shaft being protrudingly provided in the direction opposite to said respective third connection arms, while the remaining said third and fourth connection arms being provided in the same direction as the corresponding fourth connection arm of the bucket-maneuvering intermediary pipe shaft and fourth connection arm of the arm-maneuvering intermediary pipe shaft and in the same direction as this direction there postion, any time when the said one maneuvering lever, to maneuver in push-pull manner the maneuvering valve for arm rocking, and the other maneuvering lever to maneuver in push-pull manner the maneuvering valve for bucket pivoting, are maneuvered into actuated state positions either simultaneously or individually, without suffering from interference there-between.
4. The structure recited in claim 3, in which the said confluence maneuvering mechanism comprises: a pipe shaft for confluence maneuvering, rotatably provided in parallel with the said boom-maneuvering intermediary pipe shaft; a bucket-maneuvering intermediary pipe shaft, rotatably provided in parallel with a pipe shaft; that on the said arm-maneuvering intermediary pipe shaft there are protrudingly provided, in one and the same direction just as the first and the second connection arms provided hereon, a third connection arm and a fourth connection arm further being protrudingly provided a fifth connection arm on the pipe shaft for confluence maneuvering; that this fifth connection arm and the maneuvering valve for second confluence are interlockingly connected by means of a push-pull rod; and that in the respective oblong openings in the respectively corresponding connection arms, there are engaged push-pull rods, wherein the respective tip ends of these push-pull rods and the oblong openings are so positioned that the maneuvering valve, said maneuvering valve may be operated without inter-ference therebetween.
5. The structure according to claim 1, wherein four interlocking mechanisms comprise rod interlocking systems corresponding to maneuvering sections in the transverse direction to the vehicle and back-and-forth direction of the first and second maneuvering levers; and interlocking mode change-over mechanism is constructed by journalling, in brackets for free rotation, two, namely a first and a second, interlocking shafts having the axes made to extend in juxtaposed arraying direction of these rod interlocking systems by means of fitting a first tubular body on and around an intermediary portion of the said first shaft, and a secona and a third tubular bodies on and around the said second shaft, respectively in a manner free to make relative rotation; by securely fixing, respectively on to the said first tubular body and the said second tubular body and on to the said first shaft and the third tubular body, two sets of first interlocking devices, each formed by pivotally bridging a link over two arms; and by securely fixing, re-spectively on to the said first shaft and the said first, second and third tubular bodies, second interlocking devices formed each by pivotally connecting a rod on an arm.
6. The structure recited in claim 5, in which the rods have been dismantled; and that the following have been respectively pivotally connected; the interlocking device of the first shaft with the maneuvering section of the maneuvering in the back-and-forth direction of the first man-euvering lever; the interlocking device of the first tubular body with the maneuvering section of the maneuvering in the back-and-forth direction of the second maneuvering lever; the interlocking device of the second tubular body with the maneuvering valve for arm rocking; and the interlocking device of the third tubular body with the said maneuvering valve for boom up-and-down rocking.
7. The structure recited in claim 5, in which rods have been dismantled; that the said interlocking shafts have been inverted and that the following have been respectively pivotally connected; the interlocking device of the first tubular body with the maneuvering section of the maneu-vering in the transverse direction of the first maneuvering lever; the inter-locking device of the first shaft with the maneuvering section of the man-euvering in the transverse direction of the said second maneuvering lever the interlocking device of the third tubular body with the maneuvering valve for boom swiveling; and the interlocking device of the second tubular body with the said maneuvering valve for bucket pivoting.
8. An arrangement according to claim 5, wherein said interlocking mode change-over mechanism is so made, by combination of connection of the said first and second interlocking shafts with the said first, second and third tubular bodies as to respectively interlockingly connect;
to said maneuvering valve for arm rocking with the maneuver-ing section of the maneuvering in the machine body transverse direction of the said first maneuvering lever; the said rod connected to the maneuvering section of the maneuvering in the machine body back-and-forth direction of the said second maneuvering lever, with the said maneuvering valve for boom up-and-down rocking; and the said rod connected to the maneuvering section of the maneuvering in the machine body transverse direction of the second maneuvering lever with the said maneuvering valve for bucket-pivoting.
to said maneuvering valve for arm rocking with the maneuver-ing section of the maneuvering in the machine body transverse direction of the said first maneuvering lever; the said rod connected to the maneuvering section of the maneuvering in the machine body back-and-forth direction of the said second maneuvering lever, with the said maneuvering valve for boom up-and-down rocking; and the said rod connected to the maneuvering section of the maneuvering in the machine body transverse direction of the second maneuvering lever with the said maneuvering valve for bucket-pivoting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000363093A CA1167348A (en) | 1980-10-23 | 1980-10-23 | Maneuvering portion structure of an excavation work vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000363093A CA1167348A (en) | 1980-10-23 | 1980-10-23 | Maneuvering portion structure of an excavation work vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1167348A true CA1167348A (en) | 1984-05-15 |
Family
ID=4118229
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000363093A Expired CA1167348A (en) | 1980-10-23 | 1980-10-23 | Maneuvering portion structure of an excavation work vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1167348A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022205640A1 (en) * | 2021-03-31 | 2022-10-06 | 三一汽车制造有限公司 | Engineering machine |
-
1980
- 1980-10-23 CA CA000363093A patent/CA1167348A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022205640A1 (en) * | 2021-03-31 | 2022-10-06 | 三一汽车制造有限公司 | Engineering machine |
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