JP4277765B2 - Pin coupling device, pin coupling device assembling method and work machine - Google Patents

Description

  The present invention relates to a pin coupling device that removably couples members in various work machines with hydraulically driven pins, a method for assembling the pin coupling device, and a work machine with a pin coupling device.

  The background art will be described by taking as an example a dismantling machine with an ultra-long attachment used for dismantling high-rise buildings.

  As shown in FIG. 15, the dismantling machine includes a front portion of a base machine A that includes a crawler-type lower traveling body 1 and an upper revolving body 2 that is mounted on the lower traveling body 1 so as to be rotatable about a vertical axis. And a work attachment B having a long boom 3 is mounted.

  The boom 3 of the work attachment B has a first stage, a second stage, a third stage, and a fourth stage in order of the booms 4, 5, 6, and 7 in order from the bottom. The lower end portion of the first stage boom 4 is attached to the upper swing body 2 of the base machine A.

  Further, a first boom cylinder 8 for raising and lowering the first stage boom 4 (the entire boom) between the upper swing body 2 and the first stage boom 4, the tip of the first stage boom 4, and the second stage boom 5 A second boom cylinder 9 for raising and lowering the second stage boom 5 between the second stage boom 5 and a third boom cylinder 10 for raising and lowering the third stage boom 6 between the second stage boom 5 and the third stage boom 6. Between the boom 6 and the fourth-stage boom 7, a fourth boom cylinder 11 for moving the fourth-stage boom 7 up and down is provided.

  The boom cylinders 8 to 11 are provided on the lower surface side of the boom, and the boom 3 as a whole is raised and lowered by the boom cylinders 8 to 11. As a bending and stretching operation.

  An opening / closing type crushing device 12 is provided at the tip of the boom 3 (tip of the fourth stage boom 7), and the crushing device 12 crushes the concrete lump and the like to dismantle the building.

  In FIG. 15, reference numeral 13 denotes a crusher cylinder that rotates the crusher 12 up and down around a horizontal axis. Further, the crushing device 12 is configured to be rotatable so that its direction is variable, and is rotated by a hydraulic motor (not shown).

  In such a long boom 3, each stage boom 4, 6, 7 other than the second stage boom 5 exceeds the length and weight restrictions during transportation as one block, and therefore it is necessary to include a plurality of boom sections. Disassembled and transported and assembled on site.

  For example, the first stage boom 4 is disassembled into first (basic), second, third, and fourth four boom sections Bs..., Which are pin-connected at opposite ends.

  FIG. 16 shows a state in which the first and second boom sections Bs and Bs are connected by the pin connecting devices 14 and 14 on both upper and lower sides.

  On the other hand, as a pin connection structure of a work machine, there is known a hydraulic pin type in which a connection pin is stroke-operated by a hydraulic cylinder in order to facilitate pin attachment / detachment work (see Patent Document 1).

  In this known technique, a two-cylinder structure using two hydraulic cylinders is employed. A configuration when this known technique is applied to a boom of a dismantling machine will be described with reference to FIG.

  Reference numerals 15 and 16 denote brackets as first connecting portions provided on either one of the left and right sides of the end portions to be connected to each other of the boom sections to be connected (for example, both boom sections Bs and Bs in FIG. 17). Pin holes 19 and 20 are provided in the brackets 15, 16, 17, and 18 of the two connection portions, and the pin connection device 14 is provided between the pin holes 19 and 20 on both sides. Is installed.

The pin coupling device 14 integrally couples rod ends of two hydraulic cylinders 24 and 25 arranged in series back to back, and both the hollow cylinders 24 and 25 serve as a cylinder tube by simultaneous expansion and contraction operation. 26 and 27 are inserted into and removed from the pin holes 19 and 20.
Japanese Patent No. 3399960

  However, according to this known technique, since both the pins 26 and 27 are assembled together with the hydraulic cylinders 24 and 25, the entire pin coupling device must be assembled between the side brackets 16 and 18 as one part. For this reason, the assembly work of the pin coupling device becomes troublesome.

  In addition, since the cylinders cannot be attached and detached alone, two parts (boom sections Bs and Bs) must be disassembled one by one when repairing or replacing the hydraulic cylinders 24 and 25 after the boom is assembled. This is also disadvantageous in terms of maintenance.

  Therefore, the present invention presupposes a configuration in which a pin is inserted into and removed from a pin hole by a hydraulic cylinder, and a pin connecting device and a pin that make it easy to assemble the device to the connecting portion and to detach (maintenance) the hydraulic cylinder alone A method of assembling a connecting device and a working machine are provided.

  The invention according to claim 1 (pin coupling device) is provided with a coupling portion with a pin hole in each of the two members to be coupled, and the pin coupling the coupling portions is supported by a guide member provided on the outer periphery of the pin. In this state, the pin coupling device is inserted into and removed from the pin hole by a hydraulic cylinder, the pin is formed in a cylindrical shape with both ends open, and the hydraulic cylinder is inserted into the pin from the outside in the pin axial direction. The hydraulic cylinder can be fixed to the pin in a state where the hydraulic cylinder is inserted into the pin.

According to a second aspect of the invention, connected in the configuration of claim 1, as a connecting portion of the two members to be the connecting, respectively provided with the first and second double connecting portion opposed spaced, the two joining portions A first pin that connects the first connecting portions and a second pin that connects the second connecting portions, and the first and second pins are each cylindrical, and both the connecting portions and stroke actuation in opposite directions by the hydraulic cylinders are arranged in series such that insertion and withdrawal relative to the pin holes of the two joining portions between, inserting the hydraulic cylinder to the first and second opposite inner pin In this state, it can be fixed to the pin.

According to a third aspect of the present invention, in the configuration of the second aspect, the first pin is stroke-operated as a hydraulic cylinder that allows the first and second pins to be inserted into and removed from the pin holes of both connecting portions . A hydraulic cylinder and a second hydraulic cylinder that strokes the second pin are provided, and both the hydraulic cylinders can be inserted into and removed from both pins from the outside in the axial direction, and are inserted into both pins. Each of them is configured to be fixed to a pin.

A fourth aspect of the present invention, in the configuration of claim 3, the flange provided on the tube end of the first and second double hydraulic cylinder, the flange at the opening edge portion of the distal end side of the first and second opposite pins It is configured to be detachably connected from the outside in the pin axis direction.

A fifth aspect of the present invention, in the configuration of claim 3 or 4, with to abut the rod end of the first and second double hydraulic cylinder in a state of mutually transmitting cylinder extension-side reaction force, the rod end Are each sandwiched in the radial direction by a half-ring-shaped support plate, and this support plate is fixed to the guide member, whereby the cylinder contraction side reaction force is transmitted to the guide member.

According to a sixth aspect of the present invention, in the configuration of the second aspect, the first and second pins are simultaneously opposed to each other as a hydraulic cylinder for inserting and removing the first and second pins from the pin holes of both connecting portions. The hydraulic cylinder is provided with a stroke in the direction, and the hydraulic cylinder can be inserted into and removed from both of the first and second pins from the outside in the axial direction of the first and second pins. it one end to the pin of the one described above in the state, which is constituted so as to respectively fixed to the other end to the other pin.

The invention according to claim 7 (an assembling method of the pin connecting device) is provided with a connecting portion with a pin hole in each of the two members to be connected, and a pin for connecting the connecting portions to each other is provided on the outer periphery of the pin while supporting by, a method of assembling a pin connecting device for insertion and extraction with respect to the pin hole by a hydraulic cylinder, pin hole facing at a connecting portion of the two members to be the connecting, between each interval Provided with first and second connecting portions with each other, and as a pin for connecting the two connecting portions, a first pin for connecting the first connecting portions and a second pin for connecting the second connecting portions are provided. , the first and second opposite pins each cylindrical, and so that in a stroke operation in the opposite directions by the hydraulic cylinders for insertion and withdrawal relative to the pin holes of the two joining portions between the two joining portions In series And, in which the hydraulic cylinder after inserting from the outside of the pin axis direction with respect to said first and second opposite inner pin, fixed to the pin.

The invention (working machine) of claim 8 includes a boom configured by connecting a plurality of boom sections, and brackets as connecting portions at opposite ends of two boom sections as two members to be connected. As a means for providing and connecting the brackets, the pin connecting device according to any one of claims 1 to 6 is provided within the cross-sectional width dimension of the boom section.

  According to the present invention, the pin is formed in a cylindrical shape with both ends open, and the hydraulic cylinder can be inserted into and removed from the outside in the axial direction and fixed to the pin in the inserted state. The hydraulic cylinder can be inserted from the outside of the pin in a state where the pin is incorporated between the connecting portions together with the guide member. For this reason, the assembly of the pin coupling device is simplified.

  Further, even when oil leakage or the like occurs in the hydraulic cylinder, the cylinder can be detached / attached in the direction of the pin axis alone. Therefore, the hydraulic cylinder in both the two-cylinder type of claim 3 and the single-cylinder type of claim 6 Maintenance such as repair and replacement is also facilitated.

  The above effect is high when the first and second connecting portions are connected by two pins that operate in opposite directions to each other, as exemplified in the prior art section (Claims 2 to 7). In particular, this is remarkable when a two-cylinder type in which both pins are driven by separate hydraulic cylinders (claims 3 to 5).

  In this case, according to the invention of claim 4, since the flange provided at the end of the cylinder tube is detachably connected to the opening edge on the tip side of both pins from the outside in the pin axial direction, this cylinder attaching / detaching operation is also simplified. The workability of assembly and cylinder detachment can be further improved.

  According to the invention of claim 5, the rod end portions of both cylinders are brought into contact with each other, and the rod end portions are respectively sandwiched by the half-ring-shaped support plates, and the support plates are fixed to the guide member. Therefore, it is easy to process the rod end during assembly.

  On the other hand, according to the invention of claim 8, since the pin connecting device is provided within the cross-sectional width dimension of the boom section, the device does not protrude outside the boom. For this reason, even in a machine that works close to a building such as a demolition machine, there is no possibility that the pin coupling device interferes with the building or the like.

1st Embodiment (refer FIGS. 1-11)
In the first embodiment, the first and second connecting portions are connected by two pins, and a two-cylinder configuration is adopted in which both pins are driven by separate hydraulic cylinders.

  In the following embodiment, the same parts as those of the conventional pin coupling device shown in FIG.

  The structure of the pin coupling device 40 according to this embodiment will be described with reference to FIGS.

  The pin coupling device 40 includes a first pin 41 that couples the brackets 15 and 16 on the left side of the drawing as a first coupling portion, and a second pin 42 that couples the brackets 17 and 18 on the right side of the drawing as a second coupling portion. The pins 41 and 42 are stroked in opposite directions to be inserted into and removed from the pin holes 19 and 20 on both sides.

  In FIG. 1, a pin insertion state is shown on the left side and a pin detachment state is shown on the right side across the center line. Hereinafter, the pin positions on the left side of FIG. 1 and FIG. 2 are referred to as insertion positions, and the pin positions on the right side of FIG.

  Both the first and second pins 41 and 42 are formed in a cylindrical shape with both ends opened, and are driven by separate hydraulic cylinders 43 and 43, respectively.

  Since both the hydraulic cylinders 43 and 43 have the same configuration, the description regarding the cylinder configuration will be basically made only on one side, and a description will be added for each cylinder as necessary. The hydraulic cylinders 43 and 43 are provided with sealing materials at necessary places, but the illustration and description thereof are omitted here.

  The hydraulic cylinder 43 includes a cylinder tube 44, a piston 45, and a hollow piston rod (hereinafter simply referred to as a rod) 46 connected to the piston 45, and is expanded and contracted by an external oil supply / discharge operation. Then, the pins 41 and 42 are stroke driven between both the insertion and removal positions.

  In the cylinder tube 44, the outer diameter dimension of the main body portion is set to be smaller than the inner diameter dimension of the pin, and the flange 44b of the head cover 44a provided at the end on the head side in a state of being inserted inside the pin is connected to the pins 41, 42. The front end side opening edge is fixed by a plurality of bolts 44c.

  Both hydraulic cylinders 43, 43 are configured as separate independent cylinders in which the rods 46, 46 are separated at the center of the apparatus, and are arranged in series with the rod ends supporting the extension reaction force.

  Specifically, as shown in FIGS. 2 to 4, circular reaction force transmitting portions 47 and 47 having a smaller diameter than the pin inner diameter are provided on the rod end portions of both cylinders 43 and 43 so as to protrude to the outer peripheral side, The reaction force transmission portions 47 and 47 come into contact with each other in the rod axis direction, whereby the extension side reaction force is supported at the rod ends of each other.

  On the other hand, cylindrical guide members 48 and 48 for horizontally moving the pins 41 and 42 between the insertion position and the removal position are provided on the outer peripheral sides of the pins 41 and 42, respectively.

  The guide members 48, 48 are fixed in a cantilevered manner by mounting bolts 48a (see FIG. 1) inside one bracket 16, 18 at both side connecting portions, and are provided on the outer periphery of both pins in a pin detached state. Since the portions 41a and 42a are in contact with the inner surfaces of the guide members 48 and 48, the pins 41 and 42 are kept horizontal.

  A support plate 49 is attached to the free end side of the guide member 48.

  As shown in FIGS. 3 and 6 and the like, the support plate 49 is formed in a half-shape comprising semicircular ring bodies 49a and 49b, and the inner peripheral side of both ring bodies 49a and 49b is the reaction force transmitting portion 47 at the rod end. The outer peripheral edge portion is detachably attached to the free end portion of the guide member 48 by a connector (for example, a bolt shown in the figure) 50.

  The engagement structure of the support plate 49 and the reaction force transmission portion 47 will be described. As shown in FIG. 5, a step portion 51 is provided on the inner periphery of the reaction force transmission portion 47 over the entire circumference. 49a and 49b) are in contact with the vertical surface of the step 51 from the inside.

  Thus, the cylinder contraction side reaction force when the pin is detached is transmitted from the reaction force transmission portion 47 to the support plate 49 and supported by the guide member 48.

  Here, a gap c is formed between the inner peripheral end of the support plate 49 and the horizontal surface of the stepped portion 51, and this gap c allows a certain amount of movement in the radial direction of the reaction force transmitting portion 47, that is, the rod end. It has become so.

  Next, an oil supply / discharge structure for the hydraulic cylinder 43 will be described.

  An extension-side oil passage 52 is formed in the center of the rod 46, and a contraction-side oil passage 53 is formed in a tunnel shape extending in the rod axis direction on the outer peripheral side thereof. In addition, the front end side of the contraction side oil passage 53 communicates with the cylinder contraction side oil chamber 55.

  In addition, the base end sides of both oil passages 52 and 53 communicate with oil passages 56 and 57 provided in a reaction force transmitting portion 47 that is a part of the rod 46, respectively, and are connected to the distal ends of the oil passages 56 and 57. A ring-shaped pipe joint 58 to which an external pipe H leading to the pump circuit and the tank circuit is connected is connected.

  In this way, oil is supplied to and discharged from the hydraulic cylinder 43 via the rod.

  On the other hand, as shown in FIGS. 1, 2, 4, and 6, the flange portions 41 a and 42 a of both pins 41 and 42 are provided with convex portions 59 and 59 that protrude further from the circumferential portion to the outer peripheral side. Long holes 60, 60 extending in the pin stroke direction are provided in part of the peripheral walls of the members 48, 48, and the pins 41, 42 are prevented from rotating by engaging the convex portions 59, 59 with the long holes 60, 60. .

  As another configuration, as a dust-proof means for preventing intrusion of dust or the like from the long holes 60, 60, a cover 61 that covers the long holes 60, 60 from the outer peripheral side as shown in FIG. Is provided.

  As shown in FIGS. 1 and 2, first stoppers 62 and 62 are provided projecting inwardly at the fixed ends of both guide members 48 and 48, and the flanges 41a and 42a of both pins 41 and 42 are inserted. It contacts the first stoppers 62, 62 at the position, and contacts the support plates 49, 49, which also serve as the second stopper, at the disengagement position, and reliably stops at both positions.

  Further, as shown in FIG. 1, a retaining cap 63 is attached to the tip of the pin as pin retaining means in the pin insertion state.

  A mounting bolt 64 is fixed to the inside of the center portion of the retaining cap 63, and after the pin is inserted, the mounting bolt 64 is screwed into a screw hole provided in the head cover 44 a of the cylinder tube 44. Is attached to the tip of the pin.

  The cap 63 is provided with cylindrical pin receivers 63 a and 63 b on the outer peripheral side and the inner peripheral side of the outer surface, respectively, and a detent pin 65 with a snap spring 66 projects from the outer surface of the bracket 16. It is inserted across the pin holes (reference numerals omitted) of the through-hole 16a and the pin receivers 63a and 63b. Reference numeral 18 a denotes a pin passage portion of the bracket 18.

  According to this pin coupling device 40, as described above, the hydraulic cylinders 43, 43 that drive the first and second pins 41, 42 are independent of each other, and each rod end has a diameter within the range of the gap c. Since the mounting is performed in such a manner as to freely move in the direction, even if the pins 41 and 42 are loose due to the settling of the pin holes 19 and 20, there is no possibility that an excessive load is applied to both the cylinders 43 and 43. Thereby, damage of both cylinders 43 and 43 can be prevented reliably.

  In addition, the extension side reaction force acting on both cylinders 43 and 43 is supported by the rod ends (reaction force transmitting portions 47 and 47), and the contraction side reaction force is supported by the guide member 48 via the support plate 49. be able to.

  As a result, the guide member 48 does not need to receive the reaction force (tensile force) on the expansion side of the cylinder 43 and receives only the reaction force (compression force) on the contraction side of the cylinder 43, so that the guide member 48 and the brackets 16 and 18 are fixed. A small force is sufficient (if bolts are fixed, the number of bolts can be reduced, or fixing with small diameter bolts is sufficient).

  Further, since it is not necessary to fix the cylinder rod 47 and the guide member 48, the structure can be simplified and the width dimension of the pin coupling device can be kept small.

  In this case, the support plate 49 is formed in a half ring shape, and the outer peripheral side thereof is attached to the guide member 48, and the inner peripheral side is opposed to the reaction force transmitting portion 47 while receiving the cylinder contraction side reaction force in the radial direction therebetween. Since the structure is such that the reaction force transmission portion 47 is engaged in the radial direction in a state where the gap c is formed, it is only necessary to attach the support plate 49 to the guide member 48 in a state where the support plate 49 is fitted into the reaction force transmission portion 47. Becomes easy.

  In addition, since the cylinder 46 has a rod extending side and a contracting side oil passage 52, 53, 56, 57 in the rod 46 and oil is supplied to and discharged from the hydraulic cylinder 43 from the rod end side through the rod 46. Compared with the case where an oil passage is provided in the peripheral wall of the tube 46, the processing of the cylinder 43 is much simpler and the handling is also easier. For this reason, the manufacturing cost can be reduced.

  Further, since the rod 46 can be prevented from being deformed / damaged by the load escaping action, oil leakage hardly occurs.

  Further, since the rod 46 does not move when the pins 41 and 42 are inserted and removed, it is not necessary to provide an opening for moving the external pipe. For this reason, it becomes easy to ensure the dustproof property of the whole apparatus.

  Next, the assembly procedure of this pin coupling device will be described with reference to FIGS.

  (A) As shown in FIG. 7, the pin assemblies P and P are constructed by incorporating pins 41 and 42 into the guide members 48 and 48 on both sides.

  (B) As shown in FIG. 8, the pin assemblies P and P are assembled to the brackets 16 and 18 on both sides by mounting bolts 48a one by one.

  (C) As shown in FIGS. 9 and 10, both side hydraulic cylinders 43, 43 are inserted into the pins 41, 42 of both pin assemblies P, P from the outside in the pin axial direction, and the flange 44b of the head cover 44a is connected to the bolt 44c. To the pins 41 and 42.

  At this time, it is desirable to sandwich the timber 67 between the pins 41 and 42 so that the pins 41 and 42 do not move in the axial direction.

  (D) As shown in FIG. 11, pipe joints 58 and 58 are attached to the rod ends of both cylinders 43 and 43, and support plates 49 are attached to the reaction force transmission portions 47 and 47 to fix the rods 46 and 46, Finally, the external pipe H is connected to complete the assembly.

  On the other hand, when oil leakage or the like of the hydraulic cylinder 43 occurs during use and it is necessary to repair or replace the hydraulic cylinder 43, the hydraulic cylinder 43 may be removed in the reverse order of (C) to (D).

  In this way, the pins 41 and 42 are formed in a cylindrical shape with both ends open, and the hydraulic cylinders 43 and 43 are inserted into and removed from the outside in the axial direction with respect to the pins 41 and 42, and the pin 41 in the inserted state. , 42 and the guide members 48, 48, the hydraulic cylinders 43, 43 are inserted from the outside of the pins with the pins 41, 42 assembled between the brackets 16, 18 together with the guide members 48, 48 when the apparatus is assembled. Can do. For this reason, the assembly of the pin coupling device is simplified.

  In addition, since the hydraulic cylinder alone can be attached and detached in the pin axis direction, maintenance such as repair and replacement in the event of oil leakage is facilitated. For example, as shown in FIG. 15, even when the hydraulic cylinder 43 leaks with the boom 3 already assembled, the cylinder 43 is connected from the outside while the boom 3 is connected with the pins 41 and 42. It can be exchanged.

  In this case, since the flange 44b provided on the head cover 44a at the end of the cylinder tube is detachably connected to the opening edge on the tip side of the pins 41, 42 by the bolt 44c from the outside in the pin axis direction, this cylinder attaching / detaching work is also simplified. Further, the workability of assembly and cylinder removal can be further improved.

  Further, the rod end portions (reaction force transmitting portions 47, 47) of the cylinders 43, 43 are brought into contact with each other, and the rod end portions are sandwiched from the radial direction by the half-ring-shaped support plates 49, 49, respectively. Since the support plates 49 and 49 are fixed to the guide members 48 and 48, the processing of the rod end portion during assembly is facilitated.

Second embodiment (see FIGS. 12 to 14)
Only differences from the first embodiment will be described.

  In the pin coupling device 69 according to the second embodiment, as shown in FIG. 12, a single cylinder type configuration is employed in which both pins 41 and 42 are stroke-operated in opposite directions by a single hydraulic cylinder 70.

  The hydraulic cylinder 70 includes a cylinder tube 71, a piston 72, and a hollow piston rod 73 connected to the piston 72. The hydraulic cylinder 70 expands and contracts by an oil supply / discharge action from the outside, and the pin 41 when extended. , 42 are inserted into the pin holes 19, 20, and are removed at the time of reduction.

  The cylinder tube 71 has both a head side and an end side bolted to both ends of the head side and the rod side in a state where the outer diameter dimension of the main body portion is set smaller than the inner diameter dimension of the pin and is inserted inside the pin. End plates 74 and 75 are fixed to the leading edge opening edge of both pins 41 and 42 with a plurality of bolts 76.

  In addition, at the opposite ends of the guide members 48, 48 provided on the outer circumferences of the pins 41, 42, as an alternative to the support plates 49, 49 of the first embodiment, Pin covers 77 and 77 serving as stoppers are attached.

  Note that the oil supply / discharge structure for the hydraulic cylinder 70 and the illustration and description of the dust cover 61 shown in the first embodiment are omitted here.

  When assembling the pin connecting device 69, first, as shown in FIG. 13, the pins 41 and 42 with the pin covers 77 and 77 are assembled into the both side guide members 48 and 48 to form the pin assemblies P and P. The pin assemblies P and P are assembled between the brackets 16 and 18.

  Next, as shown in FIG. 14, the hydraulic cylinder 70 is inserted into both the pins 41 and 42 from the side of one pin (the second pin 42 in the illustrated example, which will be described in this case).

  At this time, only the rod side end plate 75 of the both side end plates 74, 75 is attached to the rod end. Further, it is desirable to assemble a board 78 to the bracket 16 for positioning the tube end of the cylinder 70.

  After inserting the cylinder, as shown in FIG. 12, the rod side end plate 75 is fixed to the second pin 42 with bolts 76, while the plank 78 is pulled out and the head side end plate 74 is attached to the tube end. The first pin 41 is fixed with a bolt 76.

  In this way, the hydraulic cylinder 70 is assembled into both the pins 41 and 42 with the head side end connected to the first pin 41 and the rod side end connected to the second pin 42, and oil supply / discharge piping to the cylinder 70 is performed. To complete the assembly.

  As described above, in the single cylinder pin coupling device 69 according to the second embodiment, the hydraulic cylinder 70 is connected to the pin 41 in the same manner as the two cylinder pin coupling device 40 according to the first embodiment. , 42 can be inserted and removed from the outside in the axial direction and fixed to the pins 41, 42 in the inserted state, so that assembly and maintenance such as repair and replacement of the cylinder 70 when oil leakage occurs are easy. It becomes.

  By the way, this invention can be applied not only to the connection part of boom sections but to the attachment part of the crushing apparatus with respect to a boom tip, a bucket, and each boom cylinder. Further, the present invention can be applied not only to a dismantling machine but also to an attachment mounting portion and a connecting portion between members of various work machines such as a crane and a hydraulic excavator.

It is sectional drawing of the pin coupling device concerning 1st Embodiment of this invention. It is a figure which expands and shows only the left half part of FIG. It is the III-III line expanded sectional view of FIG. It is the IV-IV line expanded sectional view of FIG. It is a figure which expands and shows a part of FIG. It is a disassembled perspective view of the 1st pin in the same apparatus, a hydraulic cylinder, and a guide member. It is sectional drawing which shows 1 of the assembly procedure of the apparatus. It is sectional drawing which shows 2 of the assembly procedure of the apparatus. It is sectional drawing which shows 3 of the assembly procedure of the apparatus. It is sectional drawing which shows 4 of the assembly procedure of the apparatus. It is sectional drawing which shows 5 of the assembly procedure of the apparatus. It is sectional drawing of the pin connection apparatus concerning 2nd Embodiment of this invention. It is sectional drawing which shows 1 of the assembly procedure of the apparatus. It is sectional drawing which shows 2 of the assembly procedure of the apparatus. It is a schematic side view of the dismantling machine which is an application object. It is a partial side view at the time of assembly / disassembly of a demolition machine. It is sectional drawing which shows the well-known example of a pin connection apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 3 Boom 15,16 Bracket which comprises a 1st connection part 17,18 Bracket which comprises a 2nd connection part 19,20 Pin hole 40 Pin connection apparatus 41 1st pin 42 2nd pin 43 Hydraulic cylinder 44 Cylinder tube of a hydraulic cylinder 44a Head cover 44b Flange 44c Bolt for fixing the flange to the end opening edge of the pin 45 Cylinder piston 46 Same rod 48 Guide member 49 Half split support plate 69 Pin coupling device 70 Hydraulic cylinder 71 Cylinder tube 72 Cylinder piston 73 Same Rod 74,75 End plate for fixing cylinder to pin 76 Same bolt

Claims (8)

  A connecting part with a pin hole is provided on each of the two members to be connected, and the pin that connects the two connecting parts is supported by a guide member provided on the outer periphery of the pin, and is mounted on the pin hole by a hydraulic cylinder. A pin coupling device for insertion / removal, wherein the pin is formed in a cylindrical shape with both ends open, and the hydraulic cylinder can be inserted into and removed from the outside of the pin axial direction. A pin coupling device configured to be fixed to a pin in a state of being inserted into the pin. At pin connecting device according to claim 1, as a connecting portion of the two members to be the connecting, respectively provided with the first and second double connecting portion opposed spaced, as a pin connecting the two joining portions, a second pin for connecting the first pin and the second connecting portions for connecting the first connecting portions, said first and second opposite pins each cylindrical, and the hydraulic between the two joining portions The cylinder is operated in a direction opposite to each other by a cylinder and arranged in series so as to be inserted into and removed from the pin holes of both connecting portions, and the pin is inserted in the first and second pins. A pin connecting device characterized in that it can be fixed to the pin. The pin coupling device according to claim 2, wherein the first and second pins are inserted into and removed from the pin holes of both coupling portions, and the first hydraulic cylinder operates the first pin as a stroke. A second hydraulic cylinder that operates the stroke of the second pin, and both the hydraulic cylinders can be inserted into and removed from both pins from the outside in the axial direction of the pins, and are inserted into the pins. A pin coupling device characterized by being configured to be fixed. At pin coupling device of claim 3, wherein said flange provided at the tube ends of the first and second double hydraulic cylinder, the flange of said first and second double pin tip side pin axis direction of the opening edge of A pin coupling device configured to be detachably coupled from the outside. At pin connecting device according to claim 3 or 4, wherein said rod end portion of the first and second double hydraulic cylinder causes the abutment in a state of mutually transmitting cylinder extension-side reaction forces, respectively half the rod end A pin coupling device characterized in that a cylinder contraction side reaction force is transmitted to a guide member by sandwiching the support plate in a radial direction with a ring-shaped support plate and fixing the support plate to the guide member. 3. The pin connecting device according to claim 2 , wherein the first and second pins are simultaneously operated in opposite directions as a hydraulic cylinder for inserting and removing the first and second pins from and into the pin holes of both connecting portions. One hydraulic cylinder is provided, and the hydraulic cylinder can be inserted into and removed from both pins from the outside in the axial direction of one of the first and second pins, and is inserted into both pins. side to the pins of the one above, the pin connecting device, characterized by being configured so as to respectively fixed to the other end to the other pin. A connecting part with a pin hole is provided on each of the two members to be connected, and the pin that connects the two connecting parts is supported by a guide member provided on the outer periphery of the pin, and is mounted on the pin hole by a hydraulic cylinder. a method of assembling a pin connecting device for insertion and extraction, as a connecting portion of the two members to be the connecting, provided with the first and second opposite connecting portions with pin hole facing at a interval, respectively, the both As a pin for connecting the connecting parts, the first pin for connecting the first connecting parts and a second pin for connecting the second connecting parts are provided, and the first and second pins are respectively cylindrical. The hydraulic cylinders are arranged in series so as to be stroked in opposite directions by the hydraulic cylinders between the two connecting parts so as to be inserted into and removed from the pin holes of the two connecting parts. Two cars After inserting from the outside of the pin axis direction with respect to the emission, the assembly method of the pin connecting device, characterized in that fixed to the pin. As a means for providing a boom configured by connecting a plurality of boom sections, providing brackets as connecting portions at opposite ends of two boom sections as two members to be connected , and connecting the brackets to each other, A work machine comprising the pin connecting device according to any one of claims 1 to 6 within a cross-sectional width dimension of a boom section.

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