JP6678625B2 - Cylinder link mechanism and industrial machine having the same - Google Patents

Description

  The present invention relates to a cylinder link mechanism that can be used for industrial machines such as hydraulic excavators and robots, and an industrial machine equipped with the same.

  At present, the structure of a hydraulic shovel generally used as an industrial machine has a structure in which cylinders 43 and 44 are respectively attached to an arm 45 and a boom 46 as operating parts thereof, as shown in FIG. They are installed and stretched to work individually. The power source of the working machine in such a hydraulic shovel is a hydraulic cylinder connected to the boom and the arm, respectively, but since they are used alone, the power depends on the capacity of the installed cylinder.

  In order to provide a larger force than necessary by using a boom and an arm having the same size as the conventional one, see, for example, Japanese Utility Model Application Laid-Open No. 1-102239 and Japanese Utility Model Application Laid-Open No. 3-32596. There is a booster mechanism disclosed in US Pat.

Japanese Utility Model Application Laid-Open No. 1-102239 discloses a method in which a plurality of pin holes are provided at appropriate intervals downward on the upper part of the arm, and the position of the end of the boom with respect to the arm hole and the position of the rod of the arm cylinder are pinned. Discloses a device designed to increase the excavating force by replacing the device.

  Japanese Utility Model Publication No. 3-32596 discloses that when scooping up hard ground, the bottom of the bucket cylinder is provided by a cylinder separately provided so that the angle between the piston rod of the bucket cylinder and the first link located above the bucket is 90 °. There is disclosed a device which moves the side to facilitate the scooping operation by the maximum moment.

Japanese Utility Model Laid-Open No. 1-102239 Japanese Utility Model Publication No. 3-32596

However, the method described in Document 1 has a problem that it takes a long time to replace pins and cannot be performed with one touch. Further, in the method described in Document 2, it is necessary to resist the spring force in the attached cylinder, and further, the frictional loss caused when the pin on the bottom side of the bucket cylinder slides in the guide at the tip of the attached cylinder is large. Is difficult.
Furthermore, in the structure of a hydraulic excavator that is generally used, since it is necessary to individually operate the boom and the arm, it is necessary to have sufficient experience in the operation, and especially to be skilled in the horizontal operation of the arm. In addition to the above technology, there is a problem that the pushing force is weakened because only one cylinder is used as the power source of the arm.

  In view of these problems in the prior art, the present invention has been made to facilitate the operation of a boom and an arm, and to provide a motion necessary for a work without depending on experience or skill.

  As a result of intensive studies in order to solve the problems of the conventional technique, the inventors have found that the following structure can solve the problems, and have reached the present invention.

That is, the present invention includes an operation unit and an operation unit for driving and operating the operation unit,
The operating section has a boom, an arm, the boom support section, a first cylinder, and a second cylinder, and the operating section includes a pair of operating sections, and the operating section includes a pair of operating sections. One of the sections has a first operating section, a first operating section support section, and a third pair of cylinders, and the other of the pair of operating sections has a second operating section, A second operating portion support portion and a fourth pair of cylinders, wherein the first operating portion is rotatably supported by the first operating portion support portion, and the third pair of cylinders is rotatably supported by the first operating portion support portion. The cylinder is fixed to an end of the first operation unit so as to expand and contract together by operating the first operation unit, and the second operation unit is supported by the second operation unit support unit. One end and the other end of the fourth pair of cylinders are rotatably supported at one end when the second operation unit is operated. The boom and the arm are pivotally supported so as to be rotatable relative to each other via the second operation portion pivot position so that the cylinder and the other cylinder expand and contract in reverse. Are rotatably supported by the boom support section, and the base end of the first cylinder and the base end of the second cylinder are rotated by the boom support at both ends of the boom. Movably pivotally supported, the working end of the first cylinder and the arm are rotatably supported, the working end of the second cylinder is fixed to a boom, and the first cylinder; One of the working ends of the third and fourth cylinders is connected using a hollow tube, and the second cylinder and the other of the working ends of the third and fourth cylinders are hollow. It is characterized by being connected using a tube.

  ADVANTAGE OF THE INVENTION According to the cylinder link mechanism of this invention, operation of a boom and an arm is facilitated, and the movement required for work can be provided without depending on experience or skill.

It is a side view about the operation part concerning the present invention. It is the side view and front view about the 1st operation part concerning the present invention. It is the side view and front view about the 2nd operation part concerning the present invention. 1 is an overall perspective view according to the present invention. FIG. 7 is a diagram for explaining one mode of operation of the operation unit according to the present invention. FIG. 7 is a diagram for explaining one mode of operation of the operation unit according to the present invention. 1 is a structural view of a hydraulic shovel generally used at present.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

The operation unit 1 will be described in detail with reference to FIG. The operating unit 1 has a boom 2, an arm 3, a boom support 7, a first cylinder 4, and a second cylinder 5.
The boom 2 is pivotally supported by a boom support 7 using a support shaft 8 so as to be rotatable. The boom 2 and the arm 3 are pivotally supported using a support shaft 6 so as to be mutually rotatable. Furthermore, each of the first cylinder 4 and the second cylinder 5 has a working end 9,11 and a base end 10,12. The base end 10 of the first cylinder 4 and the base end 12 of the second cylinder 5 use support shafts 13 and 14 at both ends of the boom so as to be rotatable with the boom support 7 via the boom 2. Be pivoted. The working end 9 of the first cylinder 4 is rotatably supported by the arm 3. The working end 11 of the second cylinder 5 is fixed to the boom 2. When the first cylinder 4 is driven by fixing the first cylinder 4 in this manner, the boom 2 and the arm 3 can be operated. The base end of the cylinder used in the present invention is the end on the case side in which the piston is stored, and the working end is the end on the biston side. The base end has a structure to which a hollow tube can be connected.

Next, the operation unit according to the present invention will be described. The operation unit includes a pair of operation units. One of the pair of operation units (hereinafter, referred to as an operation unit 15) will be described with reference to FIG. 2, and the other of the pair of operation units (hereinafter, referred to as an operation unit). This will be described with reference to FIG.
The operation unit 15 includes a first operation unit 16, first operation unit support units 17 and 18, and a third pair of cylinders 19 and 20. In addition, each of the cylinders 19, 20 has an active end and a proximal end (not shown).
The first operation unit 16 is rotatably supported by the first operation unit support units 17 and 18 using a support shaft 23, and the operating ends of the pair of cylinders 19 and 20 are connected to the first operation unit. The support shaft 24 is fixed to the end of the support 16. When the first operation unit 16 is rotated about the support shaft 23 by fixing in this manner, the pair of cylinders 19 and 20 can both expand and contract.
Further, the base ends of the first pair of cylinders 19 and 20 are fixed to the first pair of cylinder fixing portions using the support shaft 25.

Next, the operation unit 26 will be described with reference to FIG.
The operation unit 26 includes a second operation unit 27, second operation unit support units 28 and 29, and a fourth pair of cylinders 30 and 31. Further, each of the cylinders 30, 31 has an active end and a proximal end (not shown).
The second operation section 27 is pivotally supported by the second operation section support sections 28 and 29 using a support shaft 34 so as to be rotatable. The working ends of the pair of cylinders 30 and 31 are fixed using the support shafts 37 and 38 via the pivotal positions of the second operation unit 27. By fixing in this manner, the cylinder 30 and the cylinder 31 can be expanded and contracted in opposite directions when the second operation unit 27 is rotated about the support shaft 34. Further, the base ends of the fourth pair of cylinders 30 and 31 are fixed to the second pair of cylinder fixing portions 32 and 33 using support shafts 35 and 36.

  Next, with reference to FIG. 4, a connection relationship between the operation unit 1, the operation unit 15, and the operation unit 26 will be described. The hollow tube 39 is used to connect the base end of the first cylinder 4 in the operation unit 1, the base end of the cylinder 19 of the operation unit 15, and the base end of the cylinder 30 of the operation unit 26 to a three-way cock or the like ( (Not shown). Further, the base end of the second cylinder 5 in the operation part 1, the base end of the cylinder 20 of the operation part 15, and the base end of the cylinder 31 of the operation part 26 are connected to the three-way cock or the like by using the middle space 40. (Not shown). By connecting in this way, the first cylinder and the second cylinder can be operated simultaneously by operating the first operation unit 16 and the second operation unit 27.

  Next, one mode of operation of the cylinder link mechanism according to the present invention will be described with reference to FIGS. FIG. 5 shows a state where the boom 2 is adjusted to be perpendicular to the boom support 7. Next, when the first operation unit 16 is fixed and the second operation unit 27 is operated and tilted forward (in FIG. 4, it is tilted in the cylinder installation direction), the cylinder 30 moves in the direction of contracting the cylinder. Meanwhile, the cylinder 31 operates in a direction to extend the cylinder. Here, since the cylinder 30 and the first cylinder 4 are connected through a hollow tube, a vector is added to the first cylinder 4 in the direction in which the cylinder extends. On the other hand, since the cylinder 31 and the second cylinder 5 are connected through a hollow tube, a vector is applied to the second cylinder 5 in the direction in which the cylinder contracts. Thus, the vector from the first cylinder and the vector from the second cylinder act on the boom 2, and the boom 2 and the arm 3 operate together in the direction C in FIG. Then, when the tip of the arm 3 comes into contact with the installation surface, this operation stops (state X). From this state, when the distance of the second operation unit 27 that is tilted forward is returned to the rear (when the second operation unit 27 is returned to the original position), the vector in the opposite direction to the above becomes the boom 2. Acting, the boom and the arm operate in the direction D in FIG. 5, and stop in the original state.

Next, a case where the first operation unit 16 is operated from a certain state during the operation of FIG. 5 will be described with reference to FIG. When the first operation unit 16 is tilted forward from the above state (in FIG. 4, tilted in the cylinder installation direction), both the cylinders 19 and 20 operate in the direction in which the cylinders extend. Here, since the cylinder 19 and the first cylinder 4 and the cylinder 20 and the second cylinder 5 are connected through a hollow tube, both the first cylinder 4 and the second cylinder 5 contract. Vector acts in the direction. As a result, the boom 2 operates in the E direction in FIG. At this time, the arm 3 operates along a straight line 42 connecting the support shaft 8 and the tip 41. When the distance by which the first operation unit 16 is tilted forward is returned backward (when it is returned to the original position), a vector in the opposite direction acts on the boom 2, and the boom 2 6 operates in the F direction. At this time, the arm 3 operates along a straight line 42 connecting the support shaft 8 and the tip 41.

Therefore, as one aspect of the operation of the present invention, the distal end 41 of the arm 3 can be operated as follows. First, the position of the arm is adjusted so that a point of contact with the surface exists on a straight line connecting the support shaft 8 and the tip end 41 of the arm 3 (for example, the installation surface of the operating unit in FIG. 6). Next, when the first operation unit 16 and the second operation unit 26 are operated, the tip 41 of the arm 3 comes into contact with the surface. Further, when the first operation unit 16 and the second operation unit 26 are operated, the tip 41 of the arm moves along the surface. The operation unit 1, the operation unit 15, and the operation unit 26 do not need to be on the same plane. Further, it is not necessary that the operating section 1 is provided on the surface where the contact exists. Further, the operation unit may be installed at an arbitrary height position with respect to the surface. As described above, the cylinder link mechanism according to the present invention can use two cylinders serving as power sources and move the tip of the arm horizontally. Thereby, the pushing force of the arm can be improved.

  The cylinder link mechanism according to the present invention is applicable to industrial machines such as hydraulic excavators and robots, and can be used as appropriate.

Claims (2)

An operation unit and an operation unit for driving and operating the operation unit,
The operating section has a boom, an arm, the boom support section, a first cylinder, and a second cylinder,
The operation unit includes a pair of operation units, and one of the pair of operation units includes a first operation unit, a first operation unit support unit, and a third pair of cylinders,
The other of the pair of operation units has a second operation unit, a second operation unit support unit, and a fourth pair of cylinders,
The first operation unit is pivotally supported by the first operation unit support unit so as to be rotatable,
The third pair of cylinders are fixed to an end of the first operation unit so as to expand and contract together by operating the first operation unit,
The second operation unit is pivotally supported by the second operation unit support unit so as to be rotatable,
The one working end and the other working end of the fourth pair of cylinders are configured such that, when the second operating portion is operated, the one cylinder and the other cylinder expand and contract in the opposite direction. Fixed via the second operation part pivot position,
The boom and the arm are pivotally supported to be rotatable with each other,
The boom is rotatably supported by the boom support, and at both ends of the boom, the boom support includes a base end of a first cylinder and a base end of a second cylinder. Is rotatably pivoted,
The working end and the arm of the first cylinder are pivotally supported pivotally,
The working end of the second cylinder is fixed to the boom,
The first cylinder and one of the working ends of the third and fourth cylinders are connected using a hollow tube,
A cylinder link mechanism wherein the second cylinder and the other of the working ends of the third and fourth cylinders are connected using a hollow tube. An industrial machine using the cylinder link mechanism according to claim 1.

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