CN101768983A - Two-member connecting device - Google Patents

Abstract

A pin inserting/withdrawing mechanism (18) which is provided between left and right first brackets (12), (13) is constituted by a hydraulic cylinder (19) disposed in such a manner as to be spaced apart from left and right connecting pins (16), (17) so as to be capable of extending and contracting in the same direction as the axis of the left and right connecting pins (16), (17); a floating link (20) disposed in a floating state between the left and right first brackets (12), (13); a left link (21) for connecting the left connecting pin (16) and the hydraulic cylinder (19) by means of the floating link (20); and a right link (24) for connecting the right connecting pin (17) and the hydraulic cylinder (19) by means of the floating link (20). In consequence, the left and right connecting pins (16), (17) respectively connected to one end sides (21A), (24A) of these left and right links (21), (24) move in the left-right direction in correspondence with the extension and contraction of the hydraulic cylinder (19). As a result, the left and right connecting pins (16), (17) can be smoothly inserted into or withdrawn from the left and right first brackets (12), (13) and the left and right second brackets (14), (15).

Description

Two-member connecting device

Technical field

The present invention relates to be suitable for interconnecting for example two-member connecting device of two parts such as employed a plurality of booms of hydraulic crawler excavator.

Background technology

In general, in the occasion that the bigger structure of ground level to high-rise building etc. disintegrates, suitable use possesses the hydraulic crawler excavator of the apparatus for work that disassembling operation uses.The apparatus for work that this disassembling operation is used has a plurality of booms that are called a lot of weighing arms usually, and the front of higher level's boom is equipped with rocking arm in each boom, in the front of this rocking arm power tools such as crushing machine, grapple is installed.

And a lot of weighing arms that disassembling operation is used adopt following structure, make the length of hope by interconnecting a plurality of booms, use two-member connecting device to connect between each boom.

Connect according to the connecting pin about the two-member connecting device utilization of the prior art and to be arranged among interconnective two booms the left and right sides carriage on the boom and to be arranged between the left and right sides carriage on another boom.

This occasion, adopt following structure: about connecting pin on respectively keying rotationally close the distolateral of left and right sides connecting rod, the distolateral backing pin that uses respectively of another of these left and right sides connecting rods closes with the outstanding support component keying that is arranged on the carriage rotationally.And, be connected with the both ends of hydraulic cylinder in the middle part of the length direction of left and right sides connecting rod, when this hydraulic cylinder is stretched, connecting rod one distolateral with the backing pin be the center to the left and right direction move, thereby can extract and insert connecting pin (patent documentation 1: TOHKEMY 2005-249185 communique) with respect to carriage.

But, in above-mentioned prior art, adopt and on the carriage of the left and right sides, fixedly install support component, and utilize this support component another distolateral structure of carries left right connecting rod rotationally.Therefore, exist to use method such as welding that support component is fixed on numerous and diverse and so on the problem of operation on the carriage.

In addition, be fixed on occasion on the carriage,, be difficult to support component is positioned exactly with respect to the pin-and-hole that the connecting pin that is arranged on the carriage is used at another the distolateral support component that uses method such as welding with support link.Thus, exist to be difficult to the connecting pin that will close with a distolateral keying of connecting rod successfully inserts in the pin-and-hole of carriage or extracts and so on according to hydraulic cylinder flexible problem from pin-and-hole.

Have, adopt following structure: at a distolateral slotted hole that is formed with of connecting rod, it is that the center moves horizontally connecting pin when rotating with the backing pin that this slotted hole is used at this connecting rod, by inserting the distolateral and connecting pin that the pin that leads in this slotted hole connects connecting rod.Therefore, in order to carry out numerous and diverse processing of End Milling Process etc. at a distolateral formation slotted hole of connecting rod, exist comprising the problem that connecting rod uprises and so in the manufacturing cost of interior two-member connecting device integral body.In addition, in the occasion of a distolateral formation slotted hole of connecting rod, insert the pin that leads in the slotted hole always with the inner periphery sliding-contact of this slotted hole, thereby have the problem that causes wearing and tearing in advance and so on.

Summary of the invention

The present invention makes in view of above-mentioned prior art problems, and purpose is to provide a kind of can successfully carry out the connecting pin two-member connecting device of extracting the insertion operation of first, second parts relatively.

(1) in order to solve above-mentioned problem, the present invention is applicable to the two-member connecting device that possesses following each parts, promptly, possess: left and right directions face mutually about first parts; Be separately positioned on this each first parts about the first pin inserting hole; With above-mentioned about first parts face mutually about second parts; Be separately positioned on this each second parts and can with same axis and the above-mentioned first pin inserting hole overlapping about second sell inserting hole; Insert the left connecting pin of logical above-mentioned left first pin inserting hole and the above-mentioned left second pin inserting hole; Insert the right connecting pin of logical above-mentioned right first pin inserting hole and the above-mentioned right second pin inserting hole; And be configured in above-mentioned about between first parts, and extract and insert above-mentioned left connecting pin with respect to above-mentioned left first pin inserting hole and the above-mentioned left second pin inserting hole, and extract with respect to the pin that above-mentioned right connecting pin was extracted and inserted to the above-mentioned right first pin inserting hole and the above-mentioned right second pin inserting hole and to insert mechanism.

And, the invention is characterized in that adopt following structure, above-mentioned pin is extracted insertion mechanism and possessed: telescopically is configured in the locational hydraulic cylinder that separates from the axial location of above-mentioned left and right sides connecting pin; From the axial location of above-mentioned left and right sides connecting pin to the position of separating with above-mentioned hydraulic cylinder equidirectional, with at least can with the direction of the orthogonal axe of above-mentioned left and right sides connecting pin on the unsteady connecting rod of the quick condition configuration of moving; Connect left connecting rod between above-mentioned left connecting pin and the above-mentioned hydraulic cylinder respectively rotationally by above-mentioned unsteady connecting rod; And connect right connecting rod between above-mentioned right connecting pin and the above-mentioned hydraulic cylinder respectively rotationally by above-mentioned unsteady connecting rod, according to the elongation state of above-mentioned hydraulic cylinder or deflated state and by above-mentioned left and right sides connecting rod utilize above-mentioned left and right sides connecting pin connect respectively or separate above-mentioned about first parts and second parts.

According to this structure, if make hydraulic cylinder flexible, then left and right sides connecting rod is fulcrum direction rotation to the left and right with the connecting rod that floats, and the left and right sides connecting pin that is connected with these left and right sides connecting rods direction to the left and right moves, thereby left and right sides connecting pin is extracted and inserted to first, second parts relatively.Like this, can use hydraulic cylinder carry out easily relative first, second parts connecting pin extract the insertion operation, therefore can improve and connect or the operability during first, second parts separately.And, since do not need with hand carry out relative first, second parts connecting pin extract the insertion operation, thereby can be rapidly and carry out this connecting pin safely extract the insertion operation.

This occasion, the unsteady connecting rod of the fulcrum when becoming left and right sides connecting pin and moving with respect to about first parts become quick condition.Therefore, connecting rod moves according to the elongation of hydraulic cylinder or dwindles action and move, and first axis of selling inserting hole and the left second pin inserting hole moves horizontally along a left side thereby can make the left connecting pin that is connected with left connecting rod.And, for the right connecting pin that is connected with right connecting rod, its axis along right first pin inserting hole and the right second pin inserting hole is moved horizontally.Its result can successfully extract left connecting pin and insert with respect to a left side first pin inserting hole and a left side second pin inserting hole, and right connecting pin successfully can be extracted and inserted with respect to right first pin inserting hole and the right second pin inserting hole,

In addition, the unsteady connecting rod by making the fulcrum that becomes left and right sides connecting rod with respect to about first parts be in quick condition, thereby about not needing fulcrum with left and right sides connecting rod to be fixedly installed on respectively on first parts.Its result does not need to carry out fulcrum with each connecting rod and is arranged on operation on first parts, can improve about between first parts mount pin extract operability when inserting mechanism.

Have again, by make the unsteady connecting rod that connects between the connecting rod of the left and right sides with respect to about first parts be in quick condition, need be in the coupling part of left connecting rod and left connecting pin and the coupling part of right connecting rod and right connecting pin be provided for slotted hole that left and right sides connecting pin is moved horizontally.Its result can suppress the manufacturing cost of left and right sides connecting rod, and can suppress to connect rotationally the wearing and tearing such as pin between connecting rod and the connecting pin, thereby prolongs the application life of left and right sides connecting rod.

(2) in addition, the invention is characterized in and adopt following structure: above-mentioned left connecting rod and above-mentioned right connecting rod are installed on the connecting pin of the above-mentioned left and right sides, above-mentioned hydraulic cylinder and above-mentioned unsteady connecting rod with at least can with the direction of the orthogonal axe of above-mentioned left and right sides connecting pin on the state that moves, be configured between first, second parts of above-mentioned left side and first, second parts of above-mentioned right side, above-mentioned pin is extracted insertion mechanism and is utilized above-mentioned left and right sides connecting pin to carry out cantilever support.

According to this structure, can utilize left and right sides connecting pin that pin is extracted insertion mechanism and carry out cantilever support.Thus, can not need to be used for pin extract insert mechanism be installed in the left side first, second with first, second parts of right side between parts, the operability in the time of can improving mount pin and extract insertion mechanism.

(3) in addition, the invention is characterized in and adopt following structure: between above-mentioned left first parts and above-mentioned right first parts, stop is set, above-mentioned left connecting pin is at position and this stop butt extracted from the above-mentioned left second pin inserting hole, and above-mentioned right connecting pin is at position and this stop butt extracted from the above-mentioned right second pin inserting hole.

According to this structure, position and stop butt that left connecting pin is extracted at the second pin inserting hole from a left side, the first pin inserting hole breaks away from from a left side can to suppress left connecting pin.On the other hand, right connecting pin can suppress right connecting pin and break away from from the right first pin inserting hole also at position and the stop butt extracted from the right second pin inserting hole.Thus, can lead to a left side first pin inserting hole in that left connecting pin is inserted, and right connecting pin is inserted under the state that leads to the right first pin inserting hole, with pin extract insert mechanism remain on about between first parts.

(4) in addition, the invention is characterized in and adopt following structure: on first parts spline parts are set about above-mentioned, the above-mentioned unsteady connecting rod of this spline component limitations is that rotate at the center with above-mentioned left and right sides connecting pin.Its result, can prevent shotpin extract insert mechanism to the left and right the outside of first parts stretch out and with interference such as obstruction, thereby guard pin is extracted and is inserted mechanism.

(5) in addition, the invention is characterized in and adopt following structure: above-mentioned hydraulic cylinder is configured to can be flexible in the direction identical with the axis of above-mentioned left and right sides connecting pin, and above-mentioned left and right sides connecting rod is made of a connecting rod that connects above-mentioned hydraulic cylinder and unsteady connecting rod with respect to above-mentioned left and right sides connecting pin respectively.

According to this structure, if make hydraulic cylinder flexible in the direction identical with the axis of left and right sides connecting pin, then left and right sides connecting rod with the connecting portion with unsteady connecting rod be fulcrum to the left and right direction rotate, thereby can with respect to about the second pin inserting hole extract and insert left and right sides connecting pin.

(6) in addition, the invention is characterized in the following structure of employing: above-mentioned unsteady link configurations becomes between above-mentioned left and right sides connecting pin and above-mentioned hydraulic cylinder.Thus, make hydraulic cylinder when elongation, can with left and right sides connecting pin from about the second pin inserting hole extract, when hydraulic cylinder is dwindled, the second pin inserting hole about left and right sides connecting pin can being inserted.

(7) in addition, the invention is characterized in the following structure of employing: above-mentioned unsteady link configurations becomes to be positioned at across an above-mentioned hydraulic cylinder side opposite with above-mentioned left and right sides connecting pin.Thus, when hydraulic cylinder is dwindled, can with left and right sides connecting pin from about the second pin inserting hole extract, make hydraulic cylinder when elongation, the second pin inserting hole about left and right sides connecting pin can being inserted.

(8) in addition, the invention is characterized in and adopt following structure: above-mentioned hydraulic cylinder is configured to can be flexible with the direction of the orthogonal axe of above-mentioned left and right sides connecting pin, above-mentioned unsteady connecting rod is connected with an end of above-mentioned hydraulic cylinder, and above-mentioned left and right sides connecting rod is respectively by connecting the left and right sides first connecting rod between above-mentioned connecting pin and the above-mentioned unsteady connecting rod and being connected the other end of above-mentioned hydraulic cylinder and the left and right sides second connecting rod between the position midway of above-mentioned first connecting rod constitutes.

According to this structure, by will constitute pin extract that the hydraulic cylinder that inserts mechanism is configured to can be flexible with the direction of the orthogonal axe of left and right sides connecting pin, even thereby about the narrow occasion in interval of first parts, also can extract at interior pin and insert mechanism and be configured in easily about this between first parts comprising hydraulic cylinder.

(9) in addition, the invention is characterized in the following structure of employing: the other end of above-mentioned left and right sides second connecting rod and above-mentioned hydraulic cylinder uses a common pin to be connected.According to this structure,, extract the parts number of packages that inserts mechanism thereby can reduce pin by using common these three parts of the other end of selling coaxial connection left and right sides second connecting rod and hydraulic cylinder.

(10) have again, the invention is characterized in and adopt following structure: the either party in the second connecting rod of the above-mentioned left and right sides uses a pin to be connected with the other end of above-mentioned hydraulic cylinder, uses another root pin to connect in the position different with the position of an above-mentioned pin between the second connecting rod of the above-mentioned left and right sides.Thus, can shorten another the distolateral pin that connects either party and hydraulic cylinder among the second connecting rod of the left and right sides and the length that is connected another root pin between the second connecting rod of the left and right sides, can improve the intensity of these two pins, prolong and sell the application life of extracting insertion mechanism.

Description of drawings

Fig. 1 is the front view of hydraulic crawler excavator of a lot of weighing arm formulas of the expression two-member connecting device of having used first embodiment of the present invention.

Fig. 2 is the front view that expression is connected down the joint boom state on the boom.

Fig. 3 is that the arrow III-III direction from Fig. 2 is observed the sectional view that the part of the two-member connecting device of first embodiment is blocked.

Fig. 4 is the sectional view that the arrow IV-IV direction from Fig. 3 is observed two-member connecting device.

Fig. 5 be expression from about second carriage extract the sectional view same of the state of left and right sides connecting pin with Fig. 3.

Fig. 6 is the sectional view same with Fig. 3 of the state of left connecting pin of expression and stop butt.

Fig. 7 is that the pin of expression first embodiment is extracted the stereogram that the part of inserting mechanism etc. is blocked.

Fig. 8 is the sectional view same with Fig. 3 of the two-member connecting device of expression second embodiment.

Fig. 9 be expression from about second carriage extract the sectional view same of the state of left and right sides connecting pin with Fig. 8.

Figure 10 is the sectional view that the arrow X-X direction from Fig. 8 is observed float connecting rod, spline parts etc.

Figure 11 is that the pin of expression second embodiment is extracted the stereogram that the part of inserting mechanism etc. is blocked.

Figure 12 is the sectional view same with Fig. 3 of the two-member connecting device of expression the 3rd embodiment.

Figure 13 be expression from about second carriage extract the sectional view same of the state of left and right sides connecting pin with Figure 12.

Figure 14 is the sectional view that the arrow XIV-XIV direction from Figure 12 is observed float connecting rod, spline parts etc.

Figure 15 is the sectional view of the two-member connecting device of expression the 4th embodiment.

Figure 16 is the sectional view that the arrow XVI-XVI direction from Figure 15 is observed two-member connecting device.

Figure 17 be expression from about second carriage extract the sectional view of the state of left and right sides connecting pin.

Figure 18 is the sectional view of the state of left connecting pin of expression and stop butt.

Figure 19 is that the pin of expression the 4th embodiment is extracted the stereogram that the part of inserting mechanism etc. is blocked.

Figure 20 is the sectional view of the two-member connecting device of expression the 5th embodiment.

Figure 21 be expression from about second carriage extract the sectional view of the state of left and right sides connecting pin.

Figure 22 is the sectional view that the arrow XXII-XXII direction from Figure 20 is observed the connecting rod that floats, first connecting rod, second connecting rod, hydraulic cylinder, a pin and another root pin etc.

Figure 23 is the sectional view of the two-member connecting device of expression the 6th embodiment.

Figure 24 be expression from about second carriage extract the sectional view of the state of left and right sides connecting pin.

Figure 25 is the sectional view of the variation of first carriage about expression.

Among the figure:

11,31,41,51,71, the 91-two-member connecting device,

12,12 '-left first carriage (left first parts), a 12C-left side first pin inserting hole,

13,13 '-right first carriage (right first parts), the right first pin inserting hole of 13C-,

A 14-left side second carriage (left second parts), a 14A-left side second pin inserting hole,

Right second carriage (right second parts) of 15-, the right second pin inserting hole of 15A-,

16-left side connecting pin, the right connecting pin of 17-,

18,32,42,52,72, the 92-pin extracts and inserts mechanism,

19,53,73, the 93-hydraulic cylinder,

20,33,43,54,74, the 94-connecting rod that floats,

21,44-left side connecting rod, 24, the 45-right connecting rod,

The 30-stop, 34,47,67,88,107-spline parts,

56,76,96-left side first connecting rod (left connecting rod),

59,79,99-left side second connecting rod (left connecting rod),

62,81, the right first connecting rod (right connecting rod) of 102-,

65,84, the right second connecting rod (right connecting rod) of 105-,

Pin of 86-, another root pin of 87-.

The specific embodiment

Below, be example with the situation between the two-stage boom of a lot of weighing arms of connecting and composing hydraulic crawler excavator, be elaborated with reference to the embodiment of accompanying drawing to two-member connecting device of the present invention.

Fig. 1 to Figure 10 represents first embodiment of two-member connecting device of the present invention.

Among the figure, mark 1 expression hydraulic crawler excavator, this hydraulic crawler excavator 1 roughly comprises: caterpillar bottom driving body 2 that can be voluntarily; Can carry the top revolution 3 on this bottom driving body 2 with circling round; And the apparatus for work 4 that can face upward a lot of weighing arm formulas of the toe lateral that is arranged on this top revolution 3 with bowing motion.And this hydraulic crawler excavator 1 is suitable for for example the big structure of ground levels such as high-rise building being disintegrated.

At this, apparatus for work 4 roughly comprises: the boom 5 that is made of down boom 5A, joint boom 5B and last boom 5C that is installed in rotation on the toe lateral of top revolution 3; Be installed in rotation on the intermediate arm 6 of the front of boom 5C; Be installed in rotation on the rocking arm 7 that constitutes by lower shake-changing arm 7A and upper rocker arm 7B of the front of intermediate arm 6; And the crushing machine 8 that is installed in rotation on the front of upper rocker arm 7B as power tool.

At this, adopt following structure: the occasion of field joint boom 5B on the following boom 5A of boom 5, for example shown in Figure 2, use the hydraulic crane 9 grades joint boom 5B that slings, under being configured in, joint boom 5B under the state of the front of boom 5A, use two-member connecting device 11 described later to connect boom 5A and joint boom 5B down.

Secondly, the two-member connecting device 11 to first embodiment is elaborated.Promptly, mark 11 expression is configured in down the two-member connecting device between boom 5A and the joint boom 5B, this two-member connecting device 11 is used for the base end side of joint boom 5B is connected down the front of boom 5A.And two-member connecting device 11, comprising: first carriage 12,13 about described later to shown in Figure 7 as Fig. 3; About the first pin inserting hole 12C, 13C; About second carriage 14,15; About the second pin inserting hole 14A, 15A; Left side connecting pin 16; Right connecting pin 17; And pin is extracted insertion mechanism 18 etc.

Mark 12 is arranged on down a left side first carriage of a conduct left side first parts in the leading section left side of boom 5A, and this left side first carriage 12 is made of the left inboard first carriage 12A and the left-external side first carriage 12B that face mutually at left and right directions at certain intervals.At this, a left side inboard first carriage 12A and the left-external side first carriage 12B use the formation such as steel plate of heavy wall respectively, and use method such as welding to be fixed on down the leading section of boom 5A.

And, adopt following structure: between inboard first carriage 12A in a left side and the left-external side first carriage 12B, dispose left second carriage 14 described later.And, the both end sides of the length direction (above-below direction among Fig. 3, Fig. 4) of inboard first carriage 12A and the left-external side first carriage 12B on a left side, be equipped with a left side first pin inserting hole 12C, 12C respectively, left connecting pin 16 described later can be extracted and insert logical these left sides first pin inserting hole 12C with inserting.

Mark 13 is arranged on down the right side first carriage of right first parts of conduct on the leading section right side of boom 5A, and this right side first carriage 13 is made of the Right Inboard first carriage 13A and the right outside first carriage 13B that face mutually at left and right directions at certain intervals.At this, Right Inboard first carriage 13A and the right outside first carriage 13B use the formation such as steel plate of heavy wall respectively, and use method such as welding to be fixed on down the leading section of boom 5A.

And, adopt following structure: between Right Inboard first carriage 13A and the right outside first carriage 13B, dispose right second carriage 15 described later.In addition, the both end sides of the length direction (above-below direction among Fig. 3, Fig. 4) of the first carriage 13B outside the Right Inboard first carriage 13A and the right side, be equipped with the right first pin inserting hole 13C, 13C respectively, right connecting pin 17 described later can be extracted and insert logical these right first pin inserting hole 13C with inserting.

This occasion is arranged in the left inboard first carriage 12A of left first carriage 12 and the first pin inserting hole 12C of the left side on the left-external side first carriage 12B, is configured in same axes O-O last (with reference to Fig. 5) with the right side first pin inserting hole 13C on Right Inboard first carriage 13A that is arranged in right first carriage 13 and the right outside first carriage 13B.

Mark 14 is arranged on a left side second carriage of a conduct left side second parts in the base end part left side of joint boom 5B, and this left side second carriage 14 uses the formation such as steel plate of heavy walls, and uses method such as welding to be fixed on the base end part of joint boom 5B.And left second carriage 14 is clipped between the left inboard first carriage 12A of left first carriage 12 and the left-external side first carriage 12B and is configured.Thus, left second carriage 14 is relative with the left-external side first carriage 12B with the inboard first carriage 12A in a left side at left and right directions.In addition, on left second carriage 14, on the position corresponding, be equipped with a left side second pin inserting hole 14A with a left side first pin inserting hole 12C of left first carriage 12.

Mark 15 is arranged on the right side second carriage of right second parts of conduct on the base end part right side of joint boom 5B, and this right side second carriage 15 uses the formation such as steel plate of heavy walls, and uses method such as welding to be fixed on the base end part of joint boom 5B.And right second carriage 15 is clipped between the Right Inboard first carriage 13A of right first carriage 13 and the right outside first carriage 13B and is configured.Thus, right second carriage 15 is relative with the right outside first carriage 13B with the Right Inboard first carriage 13A at left and right directions.In addition, on right second carriage 15, on the position corresponding, be equipped with the right second pin inserting hole 15A with the right side first pin inserting hole 13C of right first carriage 13.

At this, as shown in Figure 5, the right side second pin inserting hole 15A of the left side second of left second carriage 14 pin inserting hole 14A and right second carriage 15 is can be on same axis 0-O overlapping with the right side first pin inserting hole 13C of a left side first pin inserting hole 12C of left first carriage 12 and right first carriage 13.

Mark 16 is the left connecting pins that connect between left first carriage 12 and left second carriage 14, this left side connecting pin 16 form along left and right directions extend cylindric, and can extract a left side second pin inserting hole 14A that inserting hole 12C and left second carriage 14 are sold in a left side first of inserting logical left first carriage 12 with inserting, therefore, the axis of left connecting pin 16 can be overlapping with a left side first pin inserting hole 12C of same axes O-O and left first carriage 12.At this,, be provided with diameter than the big flange part 16A in the aperture of a left side first pin inserting hole 12C be rotatably mounted with the connecting rod installation portion 16B of left connecting rod 21 described later at the base end side of left connecting pin 16.

Mark 17 is the right connecting pins that connect between right first carriage 13 and right second carriage 15, this right side connecting pin 17 form along left and right directions extend cylindric, and can extract the right side second pin inserting hole 15A that inserting hole 13C and right second carriage 15 are sold in the right side first of inserting logical right first carriage 13 with inserting, therefore, the axis of right connecting pin 17 can be overlapping with the right side first pin inserting hole 13C of same axes O-O and right first carriage 13.At this,, be provided with diameter than the big flange part 17A in the aperture of the right first pin inserting hole 13C be rotatably mounted with the connecting rod installation portion 17B of right connecting rod 24 described later at the base end side of right connecting pin 17.

Secondly, two groups the pin of extracting and insert connecting pin 16,17 about disposing on the above-below direction is extracted inserted mechanism 18 and describe.

Promptly, mark 18 is illustrated in two groups of pins that are configured on the above-below direction between left first carriage 12 and right first carriage 13 and extracts insertion mechanism, these pins are extracted insertion mechanism 18 and are extracted and insert left connecting pin 16 with respect to a left side first pin inserting hole 12C of left first carriage 12 and a left side second pin inserting hole 14A of left second carriage 14, and extract and insert right connecting pin 17 with respect to the right side first pin inserting hole 13C of right first carriage 13 and the right side second pin inserting hole 15A of right second carriage 15.And pin is extracted insertion mechanism 18 and is comprised hydraulic cylinder 19 described later, unsteady connecting rod 20, left connecting rod 21, right connecting rod 24 etc.

Mark 19 is to constitute pin to extract the hydraulic cylinder that inserts mechanism 18, this hydraulic cylinder 19 by tube 19A, piston (not shown), base end side is fixed on the piston and front constitutes from the outstanding bar 19B of tube 19A.And, hydraulic cylinder 19 with can with the same direction of axis of left and right sides connecting pin 16,17 on flexible state, be configured in the position of separating from the position of the axes O-O of left and right sides connecting pin 16,17, promptly from the axes O-O of each connecting pin 16,17 on the position that above-below direction separates.

And hydraulic cylinder 19 is by supplying with or discharge pressure oil from hydraulic power source (not shown), thereby makes bar 19B flexible, and by means of the left and right sides described later connecting rod 21,24 etc. make left and right sides connecting pin 16,17 to the left and right direction move.

The locational unsteady connecting rod that mark 20 expression is configured in from the position of left and right sides connecting pin 16,17, promptly separate at above-below direction from the position of the axes O-O of each connecting pin 16,17.Promptly, float connecting rod 20 and hydraulic cylinder 19 in abutting connection with also configuration abreast.At this, about this unsteady connecting rod 20 is not installed on any one of first carriage 12,13, but relatively about these first carriage 12,13 become quick condition and to the left and right direction extend.And, the connecting rod 20 that floats be configured for making the left and right sides connecting pin 16,17 that is connected with the left and right sides described later connecting rod 21,24 according to stretching of hydraulic cylinder 19 fulcrum that moves of direction to the left and right.

At this, the connecting rod 20 that floats forms the prism-shaped that direction is to the left and right extended, and the length dimension L of the connecting rod 20 that floats sets than the interval slightly little (with reference to Fig. 3) of inboard first carriage 12A in a left side and the Right Inboard first carriage 13A.And, the connecting rod 20 that floats is configured between left and right sides connecting pin 16,17 and the hydraulic cylinder 19, the side (left side) of left and right directions of connecting rod 20 of floating is rotatably connected on the half-way of length direction of left connecting rod 21 described later, and the opposite side (right side) of the left and right directions of the connecting rod 20 that floats is rotatably connected on the half-way of length direction of right connecting rod 24 described later.

Mark 21 is the left connecting rods that connect between left connecting pins 16 and the hydraulic cylinder 19 by the connecting rod 20 that floats, this left side connecting rod 21 by along about two plate bodys extending to the direction (above-below direction) of the axes O-O that is orthogonal to each connecting pin 16,17 of first carriage 12,13 form (with reference to Fig. 7).And, on an end 21A of left connecting rod 21, be equipped with pin-and-hole 21B, insert logical pin 22 by connecting rod installation portion 16B, thereby a distolateral 21A of left connecting rod 21 is connected with left connecting pin 16 rotationally at this pin-and-hole 21B and left connecting pin 16.In addition, the distolateral 21C of another of left connecting rod 21 uses pin 23 to be connected with the front of the bar 19B that constitutes hydraulic cylinder 19 rotationally.

Mark 24 is the right connecting rods that connect between right connecting pins 17 and the hydraulic cylinder 19 by the connecting rod 20 that floats, and this right connecting rod 24 is also same with left connecting rod 21, by along about first carriage 12,13 up and down two plate bodys extending of direction form.And, on an end 24A of right connecting rod 24, be equipped with pin-and-hole 24B, insert logical pin 25 by connecting rod installation portion 17B, thereby a distolateral 24A of right connecting rod 24 is connected with right connecting pin 17 rotationally at this pin-and-hole 24B and right connecting pin 17.In addition, the distolateral 24C of another of right connecting rod 24 uses pin 26 to be connected with the bottom side of the tube 19A that constitutes hydraulic cylinder 19 rotationally.

And, the side (left side) of left and right directions of connecting rod 20 of floating uses pin 27 to be connected with the middle part of the length direction of left connecting rod 21 rotationally, and the opposite side (right side) of the left and right directions of the connecting rod 20 that floats uses to be sold 28 and be connected with the middle part of the length direction of right connecting rod 24 rotationally.

Under this state, between the left part and the inboard first carriage 12A in a left side of the connecting rod 20 that floats, between the right part and the Right Inboard first carriage 13A of the connecting rod 20 that floats, be formed with minimum gap respectively, the connecting rod 20 that floats constitutes and can move between inboard first carriage 12A in a left side and the Right Inboard first carriage 13A according to the flexible of hydraulic cylinder 19.Also have, between unsteady connecting rod 20 and the left connecting rod 21, between unsteady connecting rod 20 and the right connecting rod 24, dispose two liners 29 across unsteady connecting rod 20 respectively.

Therefore, if make hydraulic cylinder 19 flexible, one distolateral 21A of then left connecting rod 21 is fulcrum direction rotation to the left and right with the connecting portion (pin 27) with unsteady connecting rod 20, and a distolateral 24A of right connecting rod 24 is fulcrum direction rotation to the left and right with the connecting portion (pin 28) with unsteady connecting rod 20.

Thus, when hydraulic cylinder 19 was dwindled, as shown in Figure 3, left connecting pin 16 was inserted a left side first pin inserting hole 12C of logical left first carriage 12 and a left side second pin inserting hole 14A of left second carriage 14.And right connecting pin 17 is inserted the right side first pin inserting hole 13C of logical right first carriage 13 and the right side second pin inserting hole 15A of right second carriage 15.Its result, become first carriage 12,13 about can connecting and about the structure of second carriage 14,15.

On the other hand, when making hydraulic cylinder 19 elongations, as shown in Figure 5, left connecting pin 16 breaks away from from a left side second pin inserting hole 14A of left second carriage 14, and right connecting pin 17 breaks away from from the right side second pin inserting hole 15A of right second carriage 15.Thus, become can from about first carriage opened in 12,13 minutes about the structure of second carriage 14,15.

Mark 30 is near the right connecting pin 16,17 and be arranged on stop between left first carriage 12 and right second carriage 13, this stop 30 as shown in Figure 5, position and this stop 30 butts that left side connecting pin 16 breaks away from the second pin inserting hole 14A from a left side, and right connecting pin 17 is at the position and this stop 30 butts that break away from from the right second pin inserting hole 15A.At this, stop 30 comprises: be erected at the tabular base plate 30A between inboard first carriage 12A in a left side and the Right Inboard first carriage 13A; And the outstanding central portion that is arranged at the left and right directions of this base plate 30A, and the butt plate 30B of the connecting rod installation portion 17B of the connecting rod installation portion 16B of butt left side connecting pin 16 and right connecting pin 17.

And, when making left connecting pin 16 in hydraulic cylinder 19 elongation the second pin inserting hole 14A breaking away from from a left side, the connecting rod installation portion 16B of left side connecting pin 16 and the butt plate 30B butt of stop 30, thus a left side first pin inserting hole 12C that suppresses left connecting pin 16 inboard first carriage 12A from a left side breaks away from.And, make right connecting pin 17 when the right second pin inserting hole 15A breaks away from hydraulic cylinder 19 elongation, the connecting rod installation portion 17B of right connecting pin 17 and the butt plate 30B butt of stop 30, thus of the right side first pin inserting hole 13C disengaging of right connecting pin 17 suppressed from the Right Inboard first carriage 13A.

At this, as shown in Figure 5, at link rod part installation portion 16B, the 17B of left and right sides connecting pin 16,17 during respectively with the butt plate 30B butt of stop 30, keep left connecting pin 16 only to insert a left side first pin inserting hole 12C of the logical inboard first carriage 12A in a left side, and right connecting pin 17 is only inserted the state of the right side first pin inserting hole 13C of the logical Right Inboard first carriage 13A.Therefore, pin is extracted and is inserted mechanism 18 and become by left and right sides connecting pin 16,17 and remain on structure between inboard first carriage 12A in a left side and the Right Inboard first carriage 13A.

The two-member connecting device 11 of first embodiment has aforesaid structure, secondly, describes in the situation of the front field joint boom 5B of the following boom 5A of the boom 5 that constitutes hydraulic crawler excavator 1 using this two-member connecting device 11.

At first, as shown in Figure 2, use the hydraulic crane 9 joint boom 5B that slings, the base end side of this joint boom 5B is configured in the front of the following boom 5A of upper rotating body 3 sides that are installed on hydraulic crawler excavator 1.

At this moment, pin is extracted and is inserted mechanism 18 as shown in Figure 5, under the state that makes hydraulic cylinder 19 elongations, left connecting pin 16 is inserted the left side first of the logical inboard first carriage 12A in a left side and sold inserting hole 12C, right connecting pin 17 is inserted the right side first pin inserting hole 13C of the logical Right Inboard first carriage 13A.Thus, pin is extracted and is inserted mechanism 18 and remain between inboard first carriage 12A in a left side and the Right Inboard first carriage 13A by left and right sides connecting pin 16,17.

Then, as shown in Figure 5, between the left inboard first carriage 12A and the left-external side first carriage 12B under being arranged on the boom 5A, insertion is arranged at a left side second carriage 14 on the joint boom 5B, and, between Right Inboard first carriage 13A under being arranged on the boom 5A and the right outside first carriage 13B, insert the right side second carriage 15 that is arranged on the joint boom 5B.And, the right side second pin inserting hole 15A of a left side second pin inserting hole 14A of left second carriage 14 and right second carriage 15 is overlapped on the axes O-O identical with the right side first pin inserting hole 13C of a left side first pin inserting hole 12C of left first carriage 12 and right first carriage 13.

Under this state, as shown in Figure 3, supply with or eject the pressure oil of self-hydraulic source (not shown) by pin being extracted the hydraulic cylinder 19 that inserts mechanism 18, thereby hydraulic cylinder 19 is dwindled.Thus, left side connecting rod 21 is that fulcrum rotates to counter clockwise direction with the connecting portion (pin 27) with unsteady connecting rod 20, and a left side second pin inserting hole 14A of inserting hole 12C and left second carriage 14 is sold on the left side first that therefore the left connecting pin 16 that is connected with a distolateral 21A of this left side connecting rod 21 can be inserted logical left first carriage 12.On the other hand, right connecting rod 24 is that fulcrum rotates to clockwise direction with the connecting portion (pin 28) with unsteady connecting rod 20, therefore the right connecting pin 17 that is connected with a distolateral 24A of this right connecting rod 24 can be inserted the right side first pin inserting hole 13C of logical right first carriage 13 and the right side second pin inserting hole 15A of right second carriage 15.

This occasion, a distolateral 21A of left connecting rod 21 with pin 27 be the center circle arcuation move.But, with respect to about first carriage 12,13 become quick condition unsteady connecting rod 20 can according to hydraulic cylinder 19 dwindle the action move.Thus, use the pin 22 left connecting pins 16 that are connected with a distolateral 21A of left connecting rod 21 to move horizontally by the first axes O-O that sells inserting hole 21C and a left side second pin inserting hole 14A along a left side.Identical therewith, a distolateral 24A of right connecting rod 24 with pin 28 be the center circle arcuation move.But the unsteady connecting rod 20 that becomes quick condition can move according to the action of dwindling of hydraulic cylinder 19.Thus, use the pin 25 right connecting pins 17 that are connected with a distolateral 24A of right connecting rod 24 to move horizontally along axes O-O of right first pin inserting hole 13C and the right second pin inserting hole 15A.

And, insert logical left first pin jack 12C and a left side second pin inserting hole 14A by making left connecting pin 16, thereby can enoughly should connect left first carriage 12 and left second carriage 14 by left side connecting pin 16.And, insert logical right first pin jack 13C and the right second pin inserting hole 15A by making right connecting pin 17, thereby can enoughly should connect right first carriage 13 and right second carriage 15 by right side connecting pin 17.

Its result, connecting pin 16,17 about can be enough connect the front that is arranged on down boom 5A about first carriage 12,13 and be arranged on joint boom 5B base end side about second carriage 14,15, joint boom 5B can be installed in down the front of boom 5A.

Secondly, explanation is for the front dismounting joint boom 5B from following boom 5B, and from about the front that is arranged on down boom 5A first carriage 12,13 and be arranged on joint boom 5B base end side about second carriage 14,15, the situation of extracting left and right sides connecting pin 16,17.

This occasion as shown in Figure 2, is being utilized hydraulic crane 9 to support to be installed under the state of the joint boom 5B of the front of boom 5A down, hydraulic cylinder 19 elongations that pin extracted insert mechanism 18.

Thus, as shown in Figure 5, left side connecting rod 21 is that fulcrum rotates to clockwise direction with the connecting portion (pin 27) with unsteady connecting rod 20, therefore the left connecting pin 16 that is connected with a distolateral 21A of this left side connecting rod 21 can be sold inserting hole 14A from the left side second of left second carriage 14 and extract.On the other hand, right connecting rod 24 is that fulcrum rotates to counter clockwise direction with the connecting portion (pin 28) with unsteady connecting rod 20, therefore the right connecting pin 17 that is connected with a distolateral 24A of this right connecting rod 24 can be sold inserting hole 15A from the right side second of right second carriage 15 and extract.

This occasion, for example compare with the frictional force that results between left connecting pin 16 and a left side second pin inserting hole 14A, result under the bigger situation of frictional force between right connecting pin 17 and the right second pin inserting hole 15A, as shown in Figure 6, left connecting pin 16 is extracted from the second pin inserting hole 14A of a left side earlier than right connecting pin 17.At this moment, by the connecting rod installation portion 16B of left connecting pin 16 and the butt plate 30B butt of stop 30, limit left connecting pin 16 and move to extracting direction, thereby can make the front of left connecting pin 16 insert a left side first pin inserting hole 12C that leads to the inboard first carriage 12A on a left side above necessary limit.

By like this, as if the connecting rod installation portion 16B of left connecting pin 16 and the butt plate 30B butt of stop 30, the power when then hydraulic cylinder 19 extends concentrates on right connecting rod 24, therefore right connecting pin 17 can be extracted from the right second pin inserting hole 15A reliably.And,, lead at the right side of the Right Inboard first carriage 13A first pin inserting hole 13C thereby the front of right connecting pin 17 can be inserted by the connecting rod installation portion 17B of right connecting pin 17 and the butt plate 30B butt of stop 30.

By like this, as shown in Figure 5, a left side second pin inserting hole 14A of left connecting pin 16 from left second carriage 14 can be extracted, and the right side second pin inserting hole 15A of right connecting pin 17 from right second carriage 15 extracted.Thus, can with respect to about first carriage opened in 12,13 minutes about second carriage 14,15, can be from following boom 5A dismounting joint boom 5B.

And,, keep making the state of hydraulic cylinder 19 elongations behind following boom 5A dismounting joint boom 5B.Promptly, left connecting pin 16 is inserted a left side first pin inserting hole 12C that leads to the inboard first carriage 12A on a left side, with right 17 slotting leading to of connecting pin at the right side of the Right Inboard first carriage 13A first pin inserting hole 13C.Thus, pin is extracted and is inserted mechanism 18 and remain between inboard first carriage 12A in a left side and the Right Inboard first carriage 13A with suspension status by left and right sides connecting pin 16,17.

Like this, according to first embodiment, comprise: be configured to make about being arranged on the pin between first carriage 12,13 to extract to insert mechanism 18 and separate from left and right sides connecting pin 16,17, and on the direction identical with the axes O-O of left and right sides connecting pin 16,17 telescopic hydraulic cylinder 19; Unsteady connecting rod 20 about being configured in quick condition between first carriage 12,13; By the left connecting rod 21 that floats between connecting rod 20 left connecting pins 16 of connection and the hydraulic cylinder 19; And right connecting rod 24 by floating between connecting rod 20 right connecting pins 17 of connection and the hydraulic cylinder 19.

Thus, if supply with or discharge hydraulic oil and make it flexible to hydraulic cylinder 19, then a distolateral 21A, the 24A of left and right sides connecting rod 21,24 be the fulcrum rotation with the connecting rod 20 that floats, thus make with a distolateral 21A of these left and right sides connecting rods 21,24, left and right sides connecting pin 16,17 that 24A is connected to the left and right direction move.Thus, left and right sides connecting pin 16,17 can with respect to about first carriage 12,13 and about second carriage 14,15 insert or extract.

This occasion and since can use that hydraulic cylinder 19 carries out left and right sides connecting pin 16,17 easily extract the insertion operation, thereby can improve connect or separately about first carriage 12,13 and about 14,15 o'clock operability of second carriage.And, owing to do not need to extract the insertion operation with what hand carried out left and right sides connecting pin 16,17, thereby can be rapidly and carry out this safely and extract the insertion operation.

And, since the unsteady connecting rod 20 of the fulcrum when becoming left and right sides connecting pin 16,17 and moving become with respect to about the quick condition that can move of first carriage 12,13, the connecting rod 20 that therefore floats can or dwindle action and freely move according to the elongation action of hydraulic cylinder 19.Thus, be that the center relatively rotates with pin 22 only by left connecting rod 21 and left connecting pin 16, the first pin inserting hole 12C moves horizontally with the left second axes O-O that sells inserting hole 14A along a left side just can to make left connecting pin 16.And, be that the center relatively rotates with pin 25 only by right connecting rod 24 and right connecting pin 17, right connecting pin 17 is moved horizontally along axes O-O of right first pin inserting hole 13C and the right second pin inserting hole 15A.Its result, can make left and right sides connecting pin 16,17 with respect to about first carriage 12,13 and about second carriage 14,15 successfully extract and insert.

In addition, by make float connecting rod 20 with respect to about first carriage 12,13 be in quick condition, thereby can utilize connecting pin 16,17 pairs of pins in the left and right sides to extract to insert mechanism's 18 integral body carries out cantilever support.Thus, do not need fulcrum with left and right sides connecting rod 21,24 to be fixedly installed on about on first carriage 12,13.Its result, this numerous and diverse operation of the fulcrum of left and right sides connecting rod 21,24 need be set on first carriage 12,13 about as the following boom 5A of bigger structure, can improve about between first carriage 12,13 mount pin extract operability when inserting mechanism 18.

Have again, by make float connecting rod 20 with respect to about first carriage 12,13 be in quick condition, thereby be that the center relatively rotates with pin 22 only by left connecting rod 21 and left connecting pin 16, just left connecting pin 16 can be inserted a logical left side first pin inserting hole 12C and a left side second pin inserting hole 14A, therefore the pin-and-hole 21B on the distolateral 21A who does not need to be arranged on left connecting rod 21 makes slotted hole.And, be that the center relatively rotates with pin 25 only by right connecting rod 24 and right connecting pin 17, just right connecting pin 17 can be inserted logical right first pin inserting hole 13C and the right second pin inserting hole 15A, therefore the pin-and-hole 24B on the distolateral 24A who does not need to be arranged on right connecting rod 24 makes slotted hole.

Its result, can suppress to be located in the wearing and tearing of the pin-and-hole 21B on the left connecting rod 21, the pin 22 of slotting logical this pin-and-hole 21B etc., prolong the application life of left connecting rod 21, and can suppress to be located in the wearing and tearing of the pin-and-hole 24B on the right connecting rod 24, the pin 25 of slotting logical this pin-and-hole 24B etc., prolong the application life of right connecting rod 24.And, do not need to form slotted hole at a distolateral 21A, the 24A of left and right sides connecting rod 21,24 by End Milling Process etc., therefore can reduce the manufacturing cost of left and right sides connecting rod 21,24.

Secondly, Fig. 8 to Figure 11 represents second embodiment of the present invention.This second embodiment is characterised in that being provided with the unsteady connecting rod of restriction is the spline parts that rotate at the center with left and right sides connecting pin.Also have, in second embodiment,, and omit its explanation for the structural element mark same-sign identical with above-mentioned first embodiment.

Among the figure, the two-member connecting device of mark 31 expression second embodiment, this two-member connecting device 31 is roughly same with the device of above-mentioned first embodiment, comprising: about first carriage 12,13; About the first pin inserting hole 12C, 13C; About second carriage 14,15; About the second pin inserting hole 14A, 15A; Left side connecting pin 16; Right connecting pin 17; And pin described later extracts and insert mechanism 32 etc., and is different with the structure of first embodiment but pin is extracted the structure of inserting mechanism 32.

Mark 32 is that the pin that is configured between left first carriage 12 and right first carriage 13 is extracted insertion mechanism, and this pin is extracted the pin that inserts mechanism's 32 replacements, first embodiment and extracted insertion mechanism 18 and be used for second embodiment.And pin is extracted insertion mechanism 32 and is comprised hydraulic cylinder 19, left connecting rod 21, right connecting rod 24, unsteady connecting rod 33 described later, spline parts 34 etc.

Mark 33 expressions are configured in the locational unsteady connecting rod that separates along the vertical direction from left and right sides connecting pin 16,17.Should float connecting rod 33 about become between first carriage 12,13 quick condition and to the left and right direction extend.And, the connecting rod 33 that floats be configured for making with a distolateral 21A of left and right sides connecting rod 21,24, left and right sides connecting pin 16,17 that 24A is connected according to stretching of hydraulic cylinder 19 fulcrum that moves of direction to the left and right.

At this, the connecting rod 33 that floats forms the prism-shaped of direction extension to the left and right, and the length dimension of the connecting rod 33 that floats is set slightly forr a short time than the interval of inboard first carriage 12A in a left side and the Right Inboard first carriage 13A.And a side of the left and right directions of the connecting rod 33 that floats uses pin 27 to be connected with the middle part of the length direction of left connecting rod 21, and the opposite side of left and right directions uses pin 28 to be connected with the middle part of the length direction of right connecting rod 24.And, shown in Figure 10 waits, being formed with respectively at the both ends of the left and right directions of the connecting rod 33 that floats and cutting into two forked concave part 33A, 33A, these each concave part 33A engage with spline parts 34 described later.

Mark 34 be separately positioned on about left and right sides spline parts on first carriage 12,13, the unsteady connecting rod 33 about these spline parts 34 restrictions are arranged between first carriage 12,13 is that rotate at the center with left and right sides connecting pin 16,17.

At this, spline parts 34 by along about first carriage 12,13 up and down the prism that extends of direction form.In addition, spline parts 34 use methods such as welding respectively, are fixed on the position of facing mutually with the right part of unsteady connecting rod 33 in the medial surface of the position faced mutually with the left part of unsteady connecting rod 33 in the medial surface of the inboard first carriage 12A in a left side and the Right Inboard second carriage 13A.

Its result, as shown in figure 10, the left and right sides concave part 33A that is arranged on the both ends of the connecting rod 33 that floats engages with left and right sides spline parts 34 respectively, and the connecting rod 33 that floats can move freely along spline parts 34 relative above-below directions.Promptly, float connecting rod 33 with can about between first carriage 12,13 quick condition to direction (above-below direction of Fig. 8, Fig. 9) motion of the axis that is orthogonal to each connecting pin 16,17 be configured.

Thereby it is flexible to extract the hydraulic cylinder 19 that inserts mechanism 32 by pin, and left and right sides connecting rod 21,24 be fulcrum direction rotation to the left and right with the connecting rod 33 that floats, thus make the left and right sides connecting pin 16,17 that is connected with this left and right sides connecting rod 21,24 to the left and right direction move.At this moment, float connecting rod 33 under the concave part 33A that is formed at its both ends and state that spline parts 34 engage, about between first carriage 12,13 up and down direction move.

The two-member connecting device 31 of second embodiment has aforesaid structure, for its elemental motion, does not have special difference with the two-member connecting device 11 of first embodiment.

Yet, the two-member connecting device 31 of second embodiment adopts following structure: about spline parts 34 are set on first carriage 12,13, make to be arranged on to constitute pin and extract the concave part 33A at the both ends of the unsteady connecting rod 33 that inserts mechanism 32 and engage with spline parts 34.Thus, the connecting rod 33 that floats can freely move at above-below direction, rotates for middle mind-set any direction but can limit with left and right sides connecting pin 16,17.

Secondly, Figure 12 to Figure 14 represents the 3rd embodiment of the present invention.The 3rd embodiment is characterised in that, at the connecting rod that floats across the hydraulic cylinder side configuration opposite with left and right sides connecting pin.Also have, in the 3rd embodiment,, and omit its explanation for the structural element mark same-sign identical with above-mentioned first embodiment.

Among the figure, the two-member connecting device of mark 41 expressions the 3rd embodiment.This two-member connecting device 41 is roughly same with the device of above-mentioned first embodiment, comprising: about first carriage 12,13; About the first pin inserting hole 12C, 13C; About second carriage 14,15; About the second pin inserting hole 14A, 15A; Left side connecting pin 16; Right connecting pin 17; And pin described later extracts and insert mechanism 42 etc., and is different with the structure of first embodiment but pin is extracted the structure of inserting mechanism 42.

Mark 42 is that the pin that is configured between left first carriage 12 and right first carriage 13 is extracted insertion mechanism, and this pin is extracted the pin that inserts mechanism's 42 replacements, first embodiment and extracted insertion mechanism 18 and be used for the 3rd embodiment.And pin is extracted insertion mechanism 42 and is comprised hydraulic cylinder 19, unsteady connecting rod 43 described later, left connecting rod 44, right connecting rod 45, spline parts 47 etc.

Mark 43 expression is configured in the locational unsteady connecting rod that separates along the vertical direction from left and right sides connecting pin 16,17, this unsteady connecting rod 43 about become quick condition and direction extension to the left and right between first carriage 12,13.And, the connecting rod 43 that floats be configured for making the left and right sides connecting pin 16,17 that is connected with the left and right sides described later connecting rod 44,45 according to stretching of hydraulic cylinder 19 fulcrum that moves of direction to the left and right.

At this, the connecting rod 43 that floats forms the prism-shaped of direction extension to the left and right, and the length dimension of the connecting rod 43 that floats is set slightly forr a short time than the interval of inboard first carriage 12A in a left side and the Right Inboard first carriage 13A.And the connecting rod 43 that floats is configured in across the opposite side of hydraulic cylinder 19 and left and right sides connecting pin 16,17.

Mark 44 is the left connecting rods that connect between left connecting pins 16 and the hydraulic cylinder 19 by the connecting rod 43 that floats, this left side connecting rod 44 by along about first carriage 12,13 up and down two plate bodys extending of direction form.And, be equipped with pin-and-hole 44B at a distolateral 44A of left connecting rod 44, insert logical pin 22 by connecting rod installation portion 16B, thereby a distolateral 44A of left connecting rod 44 is connected with left connecting pin 16 rotationally at this pin-and-hole 44B and left connecting pin 16.

In addition, the distolateral 44C of another of left connecting rod 44 uses pin 27 to be connected with a side (left side) of the left and right directions of unsteady connecting rod 43 rotationally.Have, the middle part of the length direction of left connecting rod 44 uses pin 23 to be connected with the front of the bar 19B that constitutes hydraulic cylinder 19 rotationally again.

Mark 45 is the right connecting rods that connect between right connecting pins 17 and the hydraulic cylinder 19 by the connecting rod 43 that floats, this right connecting rod 45 also by along about first carriage 12,13 up and down two plate bodys extending of direction form.And, be equipped with pin-and-hole 45B at a distolateral 45A of right connecting rod 45, insert logical pin 25 by connecting rod installation portion 17B, thereby a distolateral 45A of right connecting rod 45 is connected with right connecting pin 17 rotationally at this pin-and-hole 45B and right connecting pin 17.

In addition, the distolateral 45C of another of right connecting rod 45 uses pin 28 to be connected with the opposite side (right side) of the left and right directions of unsteady connecting rod 43 rotationally.Have, the middle part of the length direction of right connecting rod 45 uses pin 25 to be connected with the bottom side of the tube 19A that constitutes hydraulic cylinder 19 rotationally again.Also have, between unsteady connecting rod 43 and the left connecting rod 44, between unsteady connecting rod 43 and the right connecting rod 45, dispose two liners 46 across unsteady connecting rod 43 respectively.

Thereby when making hydraulic cylinder 19 elongations, as shown in figure 12, left connecting pin 16 is inserted a left side first pin inserting hole 12C of logical left first carriage 12 and a left side second pin inserting hole 14A of left second carriage 14.And right connecting pin 17 is inserted the right side first pin inserting hole 13C of logical right first carriage 13 and the right side second pin inserting hole 15A of right second carriage 15.Thus, can connect about first carriage 12,13 and about second carriage 14,15.

On the other hand, when hydraulic cylinder 19 was dwindled, as shown in figure 13, left connecting pin 16 broke away from from a left side second pin inserting hole 14A of left second carriage 14, and right connecting pin 17 breaks away from from the right side second pin inserting hole 15A of right second carriage 15.Thus, become can from about first carriage opened in 12,13 minutes about the structure of second carriage 14,15.

Mark 47 be separately positioned on about left and right sides spline parts on first carriage 12,13, it is that rotate at the center with left and right sides connecting pin 16,17 that the pin about these each spline parts 47 restrictions are arranged between first carriage 12,13 is extracted the unsteady connecting rod 43 that inserts mechanism 42.

At this, spline parts 47 have concave part 47A as shown in figure 14, and this concave part 47 has the cross sectional shape of " コ " font.And these spline parts 47 use method such as welding to be fixed on the medial surface of the medial surface of the inboard first carriage 12A in a left side and the Right Inboard first carriage 13A respectively, and along about first carriage 12,13 up and down direction extend.And the both ends of the left and right directions of the connecting rod 43 that floats engages with the concave part 47A of left and right sides spline parts 47 respectively, and unsteady connecting rod 43 can move freely with respect to above-below direction along spline parts 47.

The two-member connecting device 41 of the 3rd embodiment has aforesaid structure, for its elemental motion, does not have special difference with the two-member connecting device 11 of first embodiment.

Yet the two-member connecting device 41 of the 3rd embodiment is at the connecting rod 43 that floats across 16, the 17 opposite side configurations of hydraulic cylinder 19 and left and right sides connecting pin.Therefore, by making hydraulic cylinder 19 elongation, as shown in figure 12, left and right sides connecting pin 16,17 can be inserted logical about first carriage 12,13 and about second carriage 14,15.On the other hand, dwindle by making hydraulic cylinder 19, as shown in figure 13, can with left and right sides connecting pin 16,17 from about second carriage 14,15 extract.

Like this, when the hydraulic cylinder 19 to the bigger power of left and right sides connecting pin 16,17 effects extends, left and right sides connecting pin 16,17 can be inserted logical about first carriage 12,13 and about second carriage 14,15, therefore can use left and right sides connecting pin 16,17 to connect reliably about first carriage 12,13 and about second carriage 14,15.

In addition, the two-member connecting device 41 of the 3rd embodiment by make constitute both ends that pin extracts the unsteady connecting rod 43 that inserts mechanism 42 and be arranged on about the concave part 47A of spline parts 47 on first carriage 12,13 engage, thereby banking pin is extracted and is inserted mechanism 42 and be the square arbitrarily rotation of middle mind-set with left and right sides connecting pin 16,17 reliably.

Secondly, Figure 15 to Figure 19 represents the 4th embodiment of the present invention.The 4th embodiment is characterised in that, with hydraulic cylinder 19 be configured to can with the direction of the orthogonal axe of left and right sides connecting pin on flexible.Also have, in the 4th embodiment,, and omit its explanation for the structural element mark same-sign identical with above-mentioned first embodiment.

Among the figure, the two-member connecting device of mark 51 expression the 4th embodiment, this two-member connecting device 51 is roughly the same with the device of above-mentioned first embodiment, comprising: about first carriage 12,13; About the first pin inserting hole 12C, 13C; About second carriage 14,15; About the second pin inserting hole 14A, 15A; Left side connecting pin 16; Right connecting pin 17; And pin described later is extracted insertion mechanism 52 etc.But in the 4th embodiment, the structure that pin is extracted insertion mechanism 52 is different with the structure of first embodiment.

The pin that mark 52 expressions are configured between left first carriage 12 and right first carriage 13 is extracted insertion mechanism, and this pin is extracted the pin that inserts mechanism's 52 replacements, first embodiment and extracted insertion mechanism 18 and be used for the 4th embodiment.And pin is extracted insertion mechanism 52 and is comprised hydraulic cylinder 53 described later, unsteady connecting rod 54, left and right sides first connecting rod 56,62, left and right sides second connecting rod 59,65 etc.

Mark 53 is hydraulic cylinders, and this hydraulic cylinder 53 is configured on the position of separating along the vertical direction from the position of the axes O-O of left and right sides connecting pin 16,17.And hydraulic cylinder 53 is made of tube 53A, piston (not shown) and bar 53B, by supplying with or discharge pressure oil from hydraulic power source (not shown), thereby to flexible with the direction of the axes O-O quadrature of connecting pin 16,17.

Mark 54 is to be configured in the locational unsteady connecting rod that separates along the vertical direction from the position of left and right sides connecting pin 16,17, about the connecting rod 54 that should float is not installed on any of first carriage 12,13, but become quick condition with respect to first carriage 12,13 about these.

At this, unsteady connecting rod 54 is formed by the plate body of two Zhang San's angular shapes, and the plate body of this two Zhang San angular shape is faced mutually across the liner (not shown) with width also bigger than the external diameter of hydraulic cylinder 53 (tube 53A).And, the length dimension L of the left and right directions of unsteady connecting rod 54 sets slightly forr a short time than the interval of inboard first carriage 12A in a left side and the Right Inboard first carriage 13A, between the left part and the inboard first carriage 12A in a left side of the connecting rod 54 that floats, between the right part and the Right Inboard first carriage 13A of the connecting rod 54 that floats, form minimum gap (with reference to Figure 15) respectively.Thereby the connecting rod 54 that floats becomes the structure that can move according to stretching of hydraulic cylinder 53 between inboard first carriage 12A in a left side and the Right Inboard first carriage 13A.

And,, be connected with the bottom side of the tube 53A of an end that becomes hydraulic cylinder 53 rotationally by pin 55 in the middle part of the left and right directions of the connecting rod 54 that floats.And, in the both end sides of the left and right directions of the connecting rod 54 that floats, being connected with another distolateral 56B, 62B of the left and right sides described later first connecting rod 56,62 respectively rotationally, the connecting rod 54 that floats constitutes the fulcrum of these left and right sides first connecting rods 56,62.

Mark 56 is the left first connecting rods that connect between left connecting pin 16 and the unsteady connecting rod 54, and this left side first connecting rod 56 constitutes left connecting rod of the present invention with left second connecting rod 59 described later.At this, left first connecting rod 56 by along about first carriage 12,13 up and down two plate bodys extending of direction form (with reference to Figure 19).And a distolateral 56A of the length direction of left first connecting rod 56 is connected with the connecting rod installation portion 16B of left connecting pin 16 by pin 57.And the distolateral 56B of another of the length direction of left first connecting rod 56 is connected with unsteady connecting rod 54 by pin 58.

Mark 59 is the left second connecting rods that connect between the bar 53B front end of the 56C of position midway of length direction of left first connecting rod 56 and hydraulic cylinder 53, this left side second connecting rod 59 is used for the contractility of hydraulic cylinder 53 is passed to left first connecting rod 56, and forms (with reference to Figure 19) by two plate bodys facing also direction extension to the left and right at certain intervals mutually.

At this, one distolateral 59A of the length direction of left side second connecting rod 59 is connected with the 56C of position midway of left first connecting rod 56 by pin 60, and the distolateral 59B of another of the length direction of left second connecting rod 59 passes through pin 61 and is connected with bar 53B front end as the other end of hydraulic cylinder 53.

Mark 62 is the right first connecting rods that connect between right connecting pin 17 and the unsteady connecting rod 54, and this right side first connecting rod 62 constitutes right connecting rod with right second connecting rod 65 described later.At this, right first connecting rod 62 by along about two plate bodys extending of the length direction of first carriage 12,13 form.And a distolateral 62A of the length direction of right first connecting rod 62 is connected with the connecting rod installation portion 17B of right connecting pin 17 by pin 63.And the distolateral 62B of another of the length direction of right first connecting rod 62 is connected with unsteady connecting rod 54 by pin 64.

Mark 65 is the right second connecting rods that connect between the bar 53B front end of the 62C of position midway of length direction of right first connecting rod 62 and hydraulic cylinder 53, this right side second connecting rod 65 is used for the contractility of hydraulic cylinder 53 is passed to right first connecting rod 62, and same with left second connecting rod 59, by at certain intervals mutually in the face of and to the left and right two plate bodys extending of direction form.

At this, one distolateral 65A of the length direction of right second connecting rod 65 is connected with the 62C of position midway of right first connecting rod 62 by pin 66, and the distolateral 65B of another of the length direction of right second connecting rod 65 passes through pin 61 and is connected with bar 53B front end as the other end of hydraulic cylinder 53.

And in the 4th embodiment, these three parts of bar 53B front end that adopt another the distolateral 65B of another distolateral 59B, right second connecting rod 65 of left second connecting rod 59 and hydraulic cylinder 53 are by common pin 61 structures that are connected rotationally.

Thereby if make hydraulic cylinder 53 flexible, then the contractility of this hydraulic cylinder 53 is delivered to left first connecting rod 56 by left second connecting rod 59, and is delivered to right first connecting rod 62 by right second connecting rod 56.Therefore, left first connecting rod 56 with the connecting portion of unsteady connecting rod 54 (pin 58) be fulcrum to the left and right direction rotate, and right first connecting rod 62 with the connecting portion (selling 64) with unsteady connecting rod 54 be fulcrum to the left and right direction rotate.

Thus, when hydraulic cylinder 53 was dwindled, as shown in figure 15, the left connecting pin 16 that is connected with a distolateral 56A of left first connecting rod 56 was inserted a left side first pin inserting hole 12C of logical left first carriage 12 and a left side second pin inserting hole 14A of left second carriage 14.And the right connecting pin 17 that is connected with a distolateral 62A of right first connecting rod 62 is inserted the right side first pin inserting hole 13C of logical right first carriage 13 and the right side second pin inserting hole 15A of right second carriage 15.Its result, become first carriage 12,13 about can connecting and about the structure of second carriage 14,15.

On the other hand, when making hydraulic cylinder 53 elongations, as shown in figure 17, left connecting pin 16 breaks away from from a left side second pin inserting hole 14A of left second carriage 14, and right connecting pin 17 breaks away from from the right side second pin inserting hole 15A of right second carriage 15.Thus, become can from about first carriage opened in 12,13 minutes about the structure of second carriage 14,15.

And, when making left connecting pin 16 in hydraulic cylinder 53 elongation the second pin inserting hole 14A breaking away from from a left side, the connecting rod installation portion 16B of left side connecting pin 16 and the butt plate 30B butt of stop 30, thus, left connecting pin 16 keeps only inserting the state of a left side first pin inserting hole 12C that leads to the inboard first carriage 12A in a left side.And, make right connecting pin 17 when the right second pin inserting hole 15A breaks away from hydraulic cylinder 53 elongation, the butt plate 30B butt of the connecting rod installation portion 17B of right connecting pin 17 and stop 30.Thus, right connecting pin 17 keeps only inserting the state of the right side first pin inserting hole 13C that leads to the Right Inboard first carriage 13A.Thereby pin is extracted and is inserted mechanism 52 with by the state of left and right sides connecting pin 16,17 cantilever support, remains between inboard first carriage 12A in a left side and the Right Inboard first carriage 13A.

Mark 67 be separately positioned on about left and right sides spline parts on first carriage 12,13, it is that rotate at the center with left and right sides connecting pin 16,17 that these spline parts 67 banking pins are extracted the unsteady connecting rod 52 that inserts mechanism 52.

At this, spline parts 67 by along about first carriage 12,13 up and down the prism that extends of direction constitute, and use method such as welding to be fixed on the medial surface of the medial surface of the left inboard first carriage 12A and the Right Inboard second carriage 13A respectively.And two plate bodys of the connecting rod 54 that constitute to float sandwich left and right sides spline parts 67 respectively, float connecting rod 54 with the state that engages with spline parts 67 along these spline parts 67 up and down direction move.

The two-member connecting device 51 of the 4th embodiment has aforesaid structure, for its elemental motion, does not have special difference with the two-member connecting device 11 of first embodiment.

Yet the two-member connecting device of the 4th embodiment 51 adopts following structure: with pin extract insert that mechanism 52 is configured to can be flexible with the direction (above-below direction of Figure 15, Figure 16) of the axes O-O quadrature of left and right sides connecting pin 16,17.Thus, though about the narrow occasion in interval of first carriage 12,13, also can extract at interior pin and insert mechanism 52 and be configured in easily about this between first carriage 12,13 comprising hydraulic cylinder 53.

In addition, by another the distolateral 59B that connects left second connecting rod 59 by means of a common connecting pin 61 coaxially, another distolateral 65B of right second connecting rod 65 and these three parts of bar 53B front end of hydraulic cylinder 53, extract the parts number of packages that inserts mechanism 52 thereby can reduce pin.

Secondly, Figure 20 to Figure 22 represents the 5th embodiment of the present invention.The 5th embodiment is characterised in that, uses a pin to connect any one party in the second connecting rod of the left and right sides and the other end of hydraulic cylinder, uses other to connect by the root pin between the second connecting rod of the left and right sides.Also have, in the 5th embodiment,, and omit its explanation for the structural element mark same-sign identical with above-mentioned first embodiment.

Among the figure, the two-member connecting device of mark 71 expression the 5th embodiment, this two-member connecting device 71 comprises: about first carriage 12,13; About the first pin inserting hole 12C, 13C; About second carriage 14,15; About the second pin inserting hole 14A, 15A; Left side connecting pin 16; Right connecting pin 17; And pin described later is extracted insertion mechanism 72 etc.

Mark 72 is that the pin of the 5th embodiment is extracted insertion mechanism, and this pin is extracted insertion mechanism 72 and comprised: hydraulic cylinder 73 described later; Connecting rod 74 floats; Left and right sides first connecting rod 76,81; And left and right sides second connecting rod 79,84 etc.

Mark 73 is hydraulic cylinders, and this hydraulic cylinder 73 is made of tube 73A, piston (not shown) and bar 73B, and by supplying with or the discharge pressure oil to hydraulic cylinder 73 from hydraulic power source, thereby to flexible with the direction of the orthogonal axe of left and right sides connecting pin 16,17.

Mark 74 is to be configured in the locational unsteady connecting rod that separates along the vertical direction from the position of left and right sides connecting pin 16,17, this unsteady connecting rod 74 with respect to about first carriage 12,13 become quick condition.At this, same with the 4th embodiment, the connecting rod 74 that floats is formed by the plate body of two Zhang San's angular shapes of facing mutually across hydraulic cylinder 73, is connected with the bottom side of a 73A of hydraulic cylinder 73 by pin 75 in the middle part of the left and right directions of the connecting rod 74 that floats.

Mark 76 is the left first connecting rods that connect between left connecting pin 16 and the unsteady connecting rod 74, and this left side first connecting rod 76 constitutes left connecting rod of the present invention with left second connecting rod 79 described later.At this, a distolateral 76A of the length direction of left first connecting rod 76 is connected with the connecting rod installation portion 16B of left connecting pin 16 by pin 77.And the distolateral 76B of another of the length direction of left first connecting rod 76 is connected with unsteady connecting rod 74 by pin 78.

Mark 79 is the left second connecting rods that connect between the bar 73B of left first connecting rod 76 and hydraulic cylinder 73, and a distolateral 79A of the length direction of left second connecting rod 79 is connected with the 76C of position midway of left first connecting rod 76 by pin 80.And the distolateral 79B of another of the length direction of left connecting rod 79 is connected with right second connecting rod 84 described later by another root pin 87.

Mark 81 is the right first connecting rods that connect between right connecting pin 17 and the unsteady connecting rod 74, and this right side first connecting rod 81 constitutes right connecting rod with right second connecting rod 84 described later.At this, a distolateral 81A of the length direction of right first connecting rod 81 is connected with the connecting rod installation portion 17B of right connecting pin 17 by pin 82.And the distolateral 81B of another of the length direction of right first connecting rod 81 is connected with unsteady connecting rod 74 by pin 83.

Mark 84 is the right second connecting rods that connect between the bar 73B of right first connecting rod 81 and hydraulic cylinder 73, and a distolateral 84A of the length direction of this right side second connecting rod 84 is connected with the 81C of position midway of right first connecting rod 81 by pin 85.And, the 84B of position midway of the length direction of right second connecting rod 84 is connected with the bar 73B front end of hydraulic cylinder 73 by a pin 86, and the distolateral 84C of another of the length direction of right second connecting rod 84 passes through another root pin 87 and is connected with another distolateral 79B of left second connecting rod 79.

Promptly, in the 5th embodiment, connect bar 73B and right second connecting rod 84 these two parts of hydraulic cylinders 73 by a pin 86, connect left second connecting rod 79 and right second connecting rod 84 these two parts in the position different by another root pin 87 with a pin 86.Thus, as shown in figure 22, become and to shorten the structure of respectively selling 86,87 length dimension S.

Mark 88 be separately positioned on about left and right sides spline parts on first carriage 12,13, these each spline parts 88 are fixed on the medial surface of the medial surface of the inboard carriage 12A in a left side and the Right Inboard second carriage 13A.And each spline parts 88 becomes the structure that guides the connecting rod 74 that floats at above-below direction movably.

The two-member connecting device 71 of the 5th embodiment has aforesaid structure, for its elemental motion, does not have special difference with the two-member connecting device 11 of first embodiment.

Yet, the pin of the two-member connecting device 71 of the 5th embodiment is extracted and is inserted mechanism 72 bar 73B and right second connecting rod 84 these two parts by a pin 86 connection hydraulic cylinders 73, connects left second connecting rod 79 and right second connecting rod 84 these two parts by another root pin 87.Therefore, with for example that bar 73B front end, the left second connecting rod 79 of hydraulic cylinder 73 is overlapping with right second connecting rod 84 these three parts and compare with the occasion that a pin of long size is connected, can shorten and respectively sell 86,87 length dimension S.Its result can improve the intensity of pin 86,87, can prolong pin and extract the application life of inserting mechanism 72.

Secondly, Figure 23 and Figure 24 represent the 6th embodiment of the present invention.The 6th embodiment is characterised in that, adopt following structure on the contrary with above-mentioned the 4th, the 5th embodiment: when hydraulic cylinder extends, left and right sides connecting pin is inserted logical about the second pin inserting hole, when hydraulic cylinder dwindles with left and right sides connecting pin from about the second pin inserting hole extract.Also have, in the 6th embodiment,, and omit its explanation for the structural element mark same-sign identical with above-mentioned first embodiment.

Among the figure, the two-member connecting device of mark 91 expression the 6th embodiment, this two-member connecting device 91 comprises: about first carriage 12,13; About the first pin inserting hole 12C, 13C; About second carriage 14,15; About the second pin inserting hole 14A, 15A; Left side connecting pin 16; Right connecting pin 17; And pin described later is extracted insertion mechanism 92 etc.

Mark 92 is that the pin of the 6th embodiment is extracted insertion mechanism, and this pin is extracted insertion mechanism 92 and comprised hydraulic cylinder 93 described later, unsteady connecting rod 94, left and right sides first connecting rod 96,102, left and right sides second connecting rod 99,105 etc.

Mark 93 is hydraulic cylinders, and this hydraulic cylinder 93 is made of tube 93A, piston (not shown) and bar 93B, by supplying with or discharge pressure oil from hydraulic power source, and to flexible with the direction of the orthogonal axe of left and right sides connecting pin 16,17.

Mark 94 is to be configured in the locational unsteady connecting rod that separates along the vertical direction from the position of left and right sides connecting pin 16,17, the connecting rod 94 that should float is made of the plate body of two Zhang San's angular shapes of facing mutually across hydraulic cylinder 93, and with respect to about first carriage 12,13 become quick condition.And,, be connected with the bottom side of the tube 93A of hydraulic cylinder 93 by pin 95 in the middle part of the left and right directions of the connecting rod 94 that floats.

Mark 96 is the left first connecting rods that connect between left connecting pin 16 and the unsteady connecting rod 94, and this left side first connecting rod 96 constitutes left connecting rod with left second connecting rod 99 described later.At this, a distolateral 96A of left first connecting rod 96 is connected with the connecting rod installation portion 16B of left connecting pin 16 by pin 97.And the distolateral 96B of another of left first connecting rod 96 is connected with unsteady connecting rod 94 by pin 98.

Mark 99 is the left second connecting rods that connect between the bar 93B of left first connecting rod 96 and hydraulic cylinder 93, one distolateral 99A of this left side second connecting rod 99 is connected with the 96C of position midway of left first connecting rod 96 by pin 100, and another distolateral 99B is connected with the bar 93B front end of hydraulic cylinder 93 by pin 101.

Mark 102 is the right first connecting rods that connect between right connecting pin 17 and the unsteady connecting rod 94, and this right side first connecting rod 102 constitutes right connecting rod with right second connecting rod 105 described later.At this, a distolateral 102A of right first connecting rod 102 is connected with the connecting rod installation portion 17B of right connecting pin 17 by pin 103.And the distolateral 102B of another of right first connecting rod 102 is connected with unsteady connecting rod 94 by pin 104.

Mark 105 is the right second connecting rods that connect between the bar 93B of right first connecting rod 102 and hydraulic cylinder 93, one distolateral 105A of this right side second connecting rod 105 is connected with the 102C of position midway of right first connecting rod 102 by pin 106, and another distolateral 105B is connected with the bar 93B front end of hydraulic cylinder 93 by pin 101.

Therefore, when making hydraulic cylinder 93 elongations, as shown in figure 23, left connecting pin 16 is inserted a left side first pin inserting hole 12C of logical left first carriage 12 and a left side second pin inserting hole 14A of left second carriage 14.And right connecting pin 17 is inserted the right side first pin inserting hole 13C of logical right first carriage 13 and the right side second pin inserting hole 15A of right second carriage 15.

On the other hand, when hydraulic cylinder 93 was dwindled, as shown in figure 24, left connecting pin 16 broke away from from a left side second pin inserting hole 14A of left second carriage 14, and right connecting pin 17 breaks away from from the right side second pin inserting hole 15A of right second carriage 15.

Also have, mark 107 be separately positioned on about left and right sides spline parts on first carriage 12,13, these each spline parts 107 restrictions connecting rod 94 that floats is that rotate at the center with left and right sides connecting pin 16,17.

The two-member connecting device 91 of the 6th embodiment has aforesaid structure, for its elemental motion, does not have special difference with the two-member connecting device 11 of first embodiment.

Yet, it is opposite with above-mentioned the 4th, the 5th embodiment that the pin of the two-member connecting device 91 of the 6th embodiment is extracted insertion mechanism 92, when hydraulic cylinder 93 elongation, left and right sides connecting pin 16,17 can be inserted logical about first carriage 12,13 the first pin inserting hole 12C, 13C and about the second pin inserting hole 14A, the 15A of second carriage 14,15.

Also have, in the above-described first embodiment, for example understand to constitute left first carriage 12, constitute the situation of right first carriage 13 by the Right Inboard first carriage 13A and the right outside these two plate bodys of the first carriage 13B by the inboard first carriage 12A in a left side and these two plate bodys of the left-external side first carriage 12B.But, the invention is not restricted to this, for example variation that also can be as shown in figure 25 is such, use a left side first carriage 12 that constitutes by a plate body ' and right first carriage 13 '.This structure is suitable for too for second to the 6th embodiment.

In addition, the two-member connecting device 11 of above-mentioned first embodiment is for example understood the situation of the coupling part of following boom 5A, the joint boom 5B of the boom 5 be used to constitute hydraulic crawler excavator 1 and following boom 5A among the last boom 5C and joint boom 5B.But two-member connecting device 11 of the present invention is not limited thereto, and for example also can be used for the coupling part of joint boom 5B and last boom 5C, the lower shake-changing arm 7A that constitutes rocking arm 7 and the connecting portion of upper rocker arm 7B and grade.This structure is suitable for too for second to six embodiment.

In addition, in the respective embodiments described above, for example understand first carriage 12,13 about being provided with on the following boom 5A of the boom 5 that constitutes hydraulic crawler excavator 1, the situation of second carriage 14,15 about being provided with on the joint boom 5B.But the invention is not restricted to this, for example also can adopt following structure: first carriage 12,13 about being provided with on the joint boom 5B, second carriage 14,15 about being provided with on the following boom 5A.

Have again, in above-mentioned first, second, third embodiment, for example understand to use to the situation of the flexible hydraulic cylinder 19 of the same direction of axes O-O of left and right sides connecting pin 16,17, in above-mentioned the 4th, the 5th, the 6th embodiment, for example understand to use to the situation of the flexible hydraulic cylinder 53,73,93 of the direction of the axes O-O quadrature of left and right sides connecting pin 16,17.But, the invention is not restricted to this, also can make the structure of for example using the hydraulic cylinder flexible with respect to the axes O-O adipping of left and right sides connecting pin 16,17.

Claims (10)

1. two-member connecting device possesses: left and right directions face mutually about first parts; Be separately positioned on this each first parts about the first pin inserting hole; With above-mentioned about first parts face mutually about second parts; Be separately positioned on this each second parts and can with same axis and the above-mentioned first pin inserting hole overlapping about second sell inserting hole; Insert the left connecting pin of logical above-mentioned left first pin inserting hole and the above-mentioned left second pin inserting hole; Insert the right connecting pin of logical above-mentioned right first pin inserting hole and the above-mentioned right second pin inserting hole; And be configured in above-mentioned about between first parts, and extract and insert above-mentioned left connecting pin with respect to above-mentioned left first pin inserting hole and the above-mentioned left second pin inserting hole, and extract with respect to the pin that above-mentioned right connecting pin was extracted and inserted to the above-mentioned right first pin inserting hole and the above-mentioned right second pin inserting hole and to insert mechanism, it is characterized in that

Above-mentioned pin is extracted insertion mechanism and is possessed:

Telescopically is configured in the locational hydraulic cylinder that separates from the axial location of above-mentioned left and right sides connecting pin;

From the axial location of above-mentioned left and right sides connecting pin to the position of separating with above-mentioned hydraulic cylinder equidirectional, with at least can with the direction of the orthogonal axe of above-mentioned left and right sides connecting pin on the unsteady connecting rod of the quick condition configuration of moving;

Connect left connecting rod between above-mentioned left connecting pin and the above-mentioned hydraulic cylinder respectively rotationally by above-mentioned unsteady connecting rod; And

Connect right connecting rod between above-mentioned right connecting pin and the above-mentioned hydraulic cylinder respectively rotationally by above-mentioned unsteady connecting rod,

According to the elongation state of above-mentioned hydraulic cylinder or deflated state and by above-mentioned left and right sides connecting rod, utilize above-mentioned left and right sides connecting pin connect respectively or separate above-mentioned about first parts and second parts.

2. two-member connecting device according to claim 1 is characterized in that,

Above-mentioned left connecting rod and above-mentioned right connecting rod are installed on the connecting pin of the above-mentioned left and right sides, above-mentioned hydraulic cylinder and above-mentioned unsteady connecting rod with at least can with the direction of the orthogonal axe of above-mentioned left and right sides connecting pin on the state that moves, be configured between first, second parts of above-mentioned left side and first, second parts of above-mentioned right side, above-mentioned pin is extracted insertion mechanism and is utilized above-mentioned left and right sides connecting pin to carry out cantilever support.

3. two-member connecting device according to claim 1 is characterized in that,

Between above-mentioned left first parts and above-mentioned right first parts, stop is set, above-mentioned left connecting pin is at position and this stop butt extracted from the above-mentioned left second pin inserting hole, and above-mentioned right connecting pin is at position and this stop butt extracted from the above-mentioned right second pin inserting hole.

4. two-member connecting device according to claim 1 is characterized in that,

On first parts spline parts are set about above-mentioned, the above-mentioned unsteady connecting rod of this spline component limitations is that rotate at the center with above-mentioned left and right sides connecting pin.

5. two-member connecting device according to claim 1 is characterized in that,

Above-mentioned hydraulic cylinder is configured to can be flexible in the direction identical with the axis of above-mentioned left and right sides connecting pin,

Above-mentioned left and right sides connecting rod is made of a connecting rod that connects above-mentioned hydraulic cylinder and unsteady connecting rod with respect to above-mentioned left and right sides connecting pin respectively.

6. two-member connecting device according to claim 5 is characterized in that,

Above-mentioned unsteady link configurations becomes between above-mentioned left and right sides connecting pin and above-mentioned hydraulic cylinder.

7. two-member connecting device according to claim 5 is characterized in that,

Above-mentioned unsteady link configurations becomes to be positioned at across an above-mentioned hydraulic cylinder side opposite with above-mentioned left and right sides connecting pin.

8. two-member connecting device according to claim 1 is characterized in that,

Above-mentioned hydraulic cylinder is configured to can be flexible with the direction of the orthogonal axe of above-mentioned left and right sides connecting pin,

Above-mentioned unsteady connecting rod is connected with an end of above-mentioned hydraulic cylinder,

Above-mentioned left and right sides connecting rod is respectively by connecting the left and right sides first connecting rod between above-mentioned connecting pin and the above-mentioned unsteady connecting rod and being connected the other end of above-mentioned hydraulic cylinder and the left and right sides second connecting rod between the position midway of above-mentioned first connecting rod constitutes.

9. two-member connecting device according to claim 8 is characterized in that,

The other end of above-mentioned left and right sides second connecting rod and above-mentioned hydraulic cylinder uses a common pin to be connected.

10. two-member connecting device according to claim 8 is characterized in that,

Any one party in the second connecting rod of the above-mentioned left and right sides uses a pin to be connected with the other end of above-mentioned hydraulic cylinder, uses another root pin to connect in the position different with the position of an above-mentioned pin between the second connecting rod of the above-mentioned left and right sides.

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