JP6366534B2 - Working machine - Google Patents

Description

  The present invention relates to a working machine such as a compact truck loader and a skid steer loader.

Conventionally, work machines such as a skid steer loader and a compact truck loader are configured to be connected to another work tool (attachment) such as a hydraulic breaker or a hydraulic hammer in place of the main work tool such as a bucket. There is something.
In this type of work machine, in order to supply hydraulic oil to the hydraulic actuator of the attachment to be mounted, a hydraulic pressure take-out pipe connected to the hydraulic pump is provided on the work machine side, and a hydraulic pressure receiver connected to the hydraulic actuator is provided on the attachment side. Piping is provided. Then, the hydraulic pressure take-out pipe and the hydraulic pressure receive pipe are connected via a connection member (joint) provided in the work machine.

  As such a working machine, the technique of patent document 1 is disclosed. The working machine disclosed in Patent Document 1 is provided with a first type take-out coupler with a pressure relief valve at a tip of a pair of hydraulic take-off pipes, and a coupler support that supports the first type take-out coupler. A pressure release passage communicating with the pair of first type take-out couplers is formed. A pair of second type take-out couplers different from the first type take-out couplers are provided, and branch pipes connected to the respective second type take-out couplers are connected to the respective hydraulic pressure take-out pipes via T joints. .

JP 2013-36258 A

However, in the working machine disclosed in Patent Document 1, branch pipes are connected to the pair of second-type take-out couplers, and hydraulic take-out pipes are connected to the branch pipes via T joints. However, there is a problem that the connection structure is enlarged.
The present invention has been made to solve the problems of the prior art, and in a working machine having a connection structure that can be used by connecting an attachment, the number of parts is reduced and the connection structure is downsized. The purpose is to provide a working machine that can be used.

In order to solve the above problems, the present invention has taken the following technical means.
The work machine of the present invention includes a machine body, a cabin mounted on the machine body, a boom provided on a side of the cabin, a work device provided on the machine body, and a connection member provided on the work device. A hydraulic actuator connectable to the connecting member, a control valve for controlling hydraulic oil supplied to the hydraulic actuator, and a pair of first actuators connectable to the control valve and disposed along the boom A pipe and a pair of second pipes connectable to the hydraulic actuator, wherein the connection member includes a first port to which one of the pair of first pipes can be connected, and the pair of pipes. A second port to which the other first pipe material can be connected, a third port to which any one of the pair of second pipe materials can be connected, and the third port are provided at different positions. The pair of second tubes A fourth port connectable to any one of the above, a fifth port provided at a position different from the third port and the fourth port, and connectable to any one of the pair of second pipe members, A sixth port provided at a position different from the third port, the fourth port, and the fifth port, to which any one of the pair of second pipe members can be connected; and the first port to the third port; A first branch oil passage that extends toward the fourth port and branches into two and connects to the third port and the fourth port; and extends from the second port toward the fifth port and the sixth port; A second branch oil passage that branches into two and connects to the fifth port and the sixth port, and the connecting member is configured as an integral body, and the first port, the second port, 3rd port, 4th port, 5th port, front A main body in which a sixth port, the first branch oil passage, and the second branch oil passage are formed, and the first pipe member extends to above the upper surface near the front portion of the boom, The first port and the second port are connected to the first port and the second port, and the branch portion of the first branch oil passage and the branch portion of the second branch oil passage are upper surfaces near the front portion of the boom. Is arranged .

Further, the first port and the second port, the third port and the fifth port, the fourth port and the sixth port are arranged side by side in the body width direction, respectively, and the third port and the second port 4 ports, the 5th port, and the 6th port are arranged in the up-and-down direction, respectively. The first port is disposed between the third port and the fourth port in the vertical direction, and the second port is disposed between the fifth port and the sixth port in the vertical direction. Arranged between.

In addition, the main body includes an oil discharge passage provided inside the main body and capable of communicating with the second branch oil passage, and a screw hole for attaching the main body to the boom. 6 ports are disposed above the fifth port, the oil drainage passage is disposed above the sixth port, and the screw hole is a side surface of the main body and is disposed above the sixth port. Arranged below, the main body is attached to the boom via a stay attached to the screw hole.

Moreover, the said screw hole and the said oil draining path are provided in the one side of the body width direction of the said main body.
The oil drainage path is disposed above the first port, the second port, the third port, the fourth port, the fifth port, and the sixth port.

The third port and the fifth port are provided with large-diameter ports, and the fourth port and the sixth port are provided with small-diameter ports having a smaller diameter than the large-diameter port.
A second connecting member attached to the connecting member, the second connecting member having an oil passage that is different from the first branch oil passage and the second branch oil passage; A pipe material different from the one pipe material and the second pipe material can be connected.

A traveling device disposed on the right side and the left side of the machine body; and a work tool mounted on the boom, wherein the connection member supplies hydraulic oil to another work tool attached in place of the work tool. It is a member for doing, Comprising: It is provided in the said boom.

  According to the working machine according to the present invention, the connection member includes a first connection part that can connect the first pipe material, a plurality of second connection parts that can connect the second pipe material, and a plurality of second connection parts from the first connection part. A branch oil passage extending toward the two connection portions and branching into at least two and connecting to the plurality of second connection portions. That is, since the connection member has a branch oil passage, it is not necessary to prepare and connect a branch pipe or a T joint separately from the connection member. Therefore, the number of parts can be reduced, and the connection structure between the first pipe member and the second pipe member can be reduced in size.

It is a perspective view which shows the body of a working machine. It is a perspective view which shows the hydraulic pressure taking-out structure to an attachment. FIG. 3 is an enlarged view of a main part of FIG. 2. It is a front view of a connection member. It is a front perspective view of a connection member. It is a back perspective view of a connection member. FIG. 5 is a partial cross-sectional explanatory view taken along a line AA in FIG. 4. FIG. 5 is a partial cross-sectional explanatory view of a BB portion in FIG. 4. FIG. 5 is a partial cross-sectional explanatory view of a CC section in FIG. 4. FIG. 5 is a partial cross-sectional explanatory view of a DD portion in FIG. 4. FIG. 3 is a hydraulic circuit diagram of a structure for taking out hydraulic pressure to an attachment. It is a figure which shows the example which attached another connection member to the connection member. It is a side view of a working machine. It is a front view of a working machine. It is a top view of a working machine. It is a side view of a working machine provided with a wheel type traveling device. It is a front view of the working machine which has arranged the connection member ahead of the boom. It is a front view of the working machine which has arrange | positioned the connection member to the machine body inner side of a boom. It is a front view of the working machine which has arranged the connecting member on the machine body outside side of the boom. It is a side view of the working machine which has arranged the connection member ahead of the boom.

Hereinafter, an embodiment of a working machine according to the present invention will be described with reference to the drawings.
FIG. 13 shows a side view of the working machine 1 according to the present invention. FIG. 14 shows a front view of the work machine 1. FIG. 15 is a plan view of the work machine 1.
13 to 15 show a compact truck loader as an example of a working machine. However, the working machine according to the present invention is not limited to a compact truck loader, and may be another type of loader working machine such as a skid steer loader. Moreover, a working machine other than the loader working machine may be used.

The work machine 1 includes a body (vehicle body) 2, a cabin 3, a work device 4, and a travel device 5.
A cabin 3 is mounted on the body 2. A driver's seat 6 is provided at the rear of the cabin 3. In the present invention, the front side (left side in FIG. 13) of the driver seated on the driver's seat 6 of the work machine 1 is front, the rear side (right side in FIG. 13) is rearward, and the left side of the driver (front side in FIG. 13). Side) is the left side, and the right side of the driver (the back side in FIG. 13) is the right side. The horizontal direction, which is a direction orthogonal to the front-rear direction, will be described as the body width direction. As shown in FIG. 14, the direction from the center part of the airframe 2 toward the right part or the left part will be described as the outside of the airframe. In other words, the outward direction of the body is the direction of the body width and away from the body 2. The direction opposite to the outside of the aircraft will be described as the inside of the aircraft. In other words, the in-machine direction is the width direction of the machine body and the direction approaching the machine body 2.

As shown in FIG. 1, the airframe 2 includes a right side frame portion 8, a left side frame portion 9, a front frame portion 10, a bottom frame portion 11, and an upper frame portion 12.
The right side frame portion 8 constitutes the right portion of the airframe 2. The left side frame portion 9 constitutes the left portion of the airframe 2. The front frame portion 10 constitutes the front portion of the body 2 and connects the front portions of the right side frame portion 8 and the left side frame portion 9 to each other. The bottom frame portion 11 constitutes the bottom portion of the airframe 2 and connects the lower portions of the right side frame portion 8 and the left side frame portion 9 to each other. The upper frame portion 12 constitutes an upper portion near the rear portion of the machine body 2, and connects the upper portions near the rear portion of the right side frame portion 8 and the left side frame portion 9.

  The side frame portions 8 and 9 have a main frame 13, a track frame 14, a motor attachment portion 15, and a support frame 16. The track frame 14 is attached to the lower part of the outer surface of the main frame 13 via an attachment member 17. The motor mounting portion 15 is provided at an upper portion near the rear portion of the outer surface of the main frame 13. The support frame 16 is attached to the rear part of the main frame 13.

  The support frame 16 has an inner wall (first wall) 18, an outer wall (second wall) 19, a front wall (fourth wall) 20, and a rear wall (third wall) 21. The inner wall 18 and the outer wall 19 are provided to face each other with an interval in the body width direction. The outer wall 19 is located on the inner side of the inner wall 18. The front wall 20 is provided in the middle part of the main frame 13 in the body width direction, so that it protrudes not only inside the body of the main frame 13 but also outside the body. A portion of the front wall 20 protruding outward from the machine body constitutes a fender that covers the rear portion of the traveling device 5. The front wall 20 connects the front part of the inner wall 18 and the front part of the outer wall 19. The rear wall 21 connects the rear part of the inner wall 18 and the rear part of the outer wall 19.

The inner wall 18 of the support frame 16 extends above the outer wall 19. The right inner wall 18 forms the right wall of the engine room. The left inner wall 18 forms the left wall of the engine room. The upper part of the right inner wall 18 and the upper part of the left inner wall 18 are connected by the upper frame part 12. The upper frame portion 12 is provided behind the cabin 3. The upper frame portion 12 has a substantially rectangular opening 12A. As shown in FIG. 15, the upper cover 201 is attached so as to cover the upper portion of the opening 12 </ b> A of the upper frame portion 12.

A work device 4 is mounted on the machine body 2. The work device 4 includes a boom 58 and a work tool 59. In the present embodiment, a bucket is provided as the work tool 59.
The boom 58 is provided on the side of the machine body 2 and on the side of the cabin 3 so as to be swingable up and down. Further, the booms 58 are provided on the right side and the left side of the cabin 3, respectively. For convenience of explanation, the boom 58 provided on the left side is referred to as a left boom 58L, and the boom 58 provided on the right side is referred to as a right boom 58R. The inner wall 18 is provided on the side of the boom 58 and on the side of the aircraft body. The outer wall 19 is provided on the side of the boom 62 and on the side opposite to the inner wall 18 (outside the fuselage). A bucket as the work tool 59 is attached to the boom 58. More specifically, the bucket 59 is provided so that the front end (front end) of the boom 58 can swing up and down.

The right boom 58R and the left boom 58L are connected to each other by connecting members 64 at the front and the rear. The rear portions (base portions) of the booms 58R and 58L are supported so as to be swingable up and down with respect to the upper portion of the body 2 near the rear portion. When the booms 58R and 58L swing up and down, the front ends of the booms 58R and 58L move up and down in front of the airframe 2.
Specifically, the rear portions of the booms 58 </ b> R and 58 </ b> L are connected to an upper portion near the rear portion of the machine body 2 via a lift link 60 and a control link 61. The lift link 60 is arranged vertically. The upper portion of the lift link 60 is connected to the rear portions of the booms 58R and 58L behind the rear connection member 64 via the first pivot shaft 66. The lower portion of the lift link 60 is inserted into the support frame 16 (between the inner wall 18 and the outer wall 19) and is pivotally supported via a second pivot shaft 67. Thereby, the lift link 60 can swing so as to move back and forth. The control link 61 is arranged in the front-rear direction. The front portion of the control link 61 is pivotally supported by a link attachment portion 41 provided between the inner wall 18 and the outer wall 19 of the support frame 16 via a fifth pivot shaft 71. The rear portion of the control link 61 is connected to the vicinity of the base end portions of the booms 58R and 58L via the sixth pivot shaft 72. Thereby, the control link 61 can swing from a substantially horizontal posture shown in FIG. 13 to a rising posture in which the rear part rises.

A boom cylinder 62 is provided between the bases of the booms 58 </ b> R and 58 </ b> L and the rear lower part of the body 2. The boom cylinder 62 is a double-acting hydraulic cylinder. By extending and retracting the boom cylinder 62, the booms 58R and 58L swing up and down.
The cylinder tube of the boom cylinder 62 is provided between the inner wall 18 and the outer wall 19. Therefore, the inner wall 18 is provided on the side of the boom cylinder 62 and on the side of the body. Further, the outer wall 19 is provided on the side of the boom cylinder 62 and on the side opposite to the inner wall 18 (outside of the body).

The lower part of the cylinder tube of the boom cylinder 62 is connected to the support frame 16 via the fourth pivot shaft 70. The tip of the cylinder rod of the boom cylinder 62 is connected to the booms 58R and 58L via the third pivot shaft 69.
The second pivot shaft 67 is located near the upper part of the rear end of the body 2. The third pivot shaft 69 is located on the opposite side of the first pivot shaft 66 with the connecting member 64 at the rear portion interposed therebetween. The fourth pivot shaft 70 is located near the lower part of the rear end of the body 2 and slightly forward of the second pivot shaft 67. The fifth pivot shaft 71 is slightly higher than the second pivot shaft 67 and is provided at a position where the front and rear positions overlap the rear portion of the cabin 3. The distance from the first pivot shaft 66 to the third pivot shaft 69 is longer than the distance from the first pivot shaft 66 to the sixth pivot shaft 72, and the first pivot shaft 66 to the fifth pivot shaft 71. It is shorter than the distance to. When viewed from the side, the boom cylinder 62 intersects the control link 61.

In the lowest position of the booms 58R and 58L with the work tool 59 grounded as shown in FIG. 13, the lift link 60 is inclined such that the first pivot shaft 66 is above the second pivot shaft 67 and slightly rearward. It is. The control link 61 is in a tilted posture in which the sixth pivot shaft 72 is raised slightly higher than the fifth pivot shaft 71. The booms 58 </ b> R and 58 </ b> L have a forward and downward inclined posture in which the third pivot shaft 69 is lower than the first pivot shaft 66 and higher than the sixth pivot shaft 72. The boom cylinder 62 intersects the approximate center of the control link 61 in the front-rear direction.

  The booms 58R, 58L, the lift link 60, and the control link 61 have a four-joint link structure having the second pivot shaft 67, the first pivot shaft 66, the fifth pivot shaft 71, and the sixth pivot shaft 72 as nodes. It has become. By extending the boom cylinder 62, the booms 58 </ b> R and 58 </ b> L rotate upward about the first pivot 66 as a fulcrum while being restrained by the control link 61 and accompanied by swinging the lift link 60 back and forth. . The control link 61 rises from the forward tilt posture shown in FIG. 13 as the rear part rises with the upward rotation of the booms 58R and 58L.

A mounting bracket 204 is pivotally supported at the distal ends of the booms 58R and 58L so as to be rotatable about a horizontal axis. A work tool 59 is mounted on the mounting bracket 204.
A work tool cylinder 63 is interposed between the mounting bracket 204 and a midway portion near the front of the boom 58. The work tool cylinder 63 is a double-acting hydraulic cylinder. By the expansion and contraction of the work tool cylinder 63, the bucket as the work tool 59 swings (squeeze / dump operation).

In addition to the bucket, the work tool 59 is a hydraulic crusher, a hydraulic breaker, an angle bloom, an earth auger, a pallet fork, a sweeper, a mower, a snow blower, or the like. The work tool 59 is detachable from the mounting bracket 204. When the work tool 59 is removed and another work tool 59 is attached to the mounting bracket 204, various operations can be performed.
The traveling device 5 is provided on the right side and the left side of the body 2.

  The traveling device 5 is a crawler traveling device and includes a drive wheel 53, driven wheels 54 </ b> F and 54 </ b> R, a roller wheel 57, and a crawler belt 56. The driven wheel includes a front driven wheel 54F and a rear driven wheel 54R. The drive wheel 53 is disposed near the upper part and the rear part between the front driven wheel 54F and the rear driven wheel 54R. A plurality of rollers 57 are provided between the front driven wheel 54F and the rear driven wheel 54R. The crawler belt 56 has an endless belt shape and is wound around the driven wheels 54 </ b> F and 54 </ b> R, the driving wheel 53, and the wheel 57.

  The driven wheels 54F and 54R and the roller wheel 57 are attached to the track frame 14 so as to be rotatable around the horizontal axis. The drive wheels 53 are attached to a rotating drum of a hydraulically driven travel motor 55 attached to the track frame 14. The travel motor 55 is attached to the motor attachment portion 15. The drive wheel 53 can be rotated around the horizontal axis by driving the travel motor 55. Thereby, the crawler belt 56 is circulated in the circumferential direction, and the work machine 1 moves forward or backward. The traveling device 5 may be a wheel-type traveling device 5 as shown in FIG.

As shown in FIG. 13, a hydraulic oil tank 84 is mounted on the front portion of the machine body 2. The hydraulic oil tank 84 is a tank that stores hydraulic oil that operates the hydraulic actuator, and is disposed on the right side of the front portion of the machine body 2. A control valve 205 is disposed behind the hydraulic oil tank 84.
On one side (left side) of the hydraulic oil tank 84, a plurality of hydraulic pumps 78, 79, 80, 81 are provided side by side. In this embodiment, the hydraulic pump 78 is a traveling pump, the hydraulic pump 79 is a main pump, the hydraulic pump 80 is a sub pump, and the hydraulic pump 81 is a pilot pump. These hydraulic pumps 78, 79, 80, 81 supply the hydraulic oil in the hydraulic oil tank 84 to a predetermined hydraulic device via the control valve 205.

The travel pump 78 is a hydraulic pump that drives the travel motor 55 shown in FIG. The travel pump 78 is a variable displacement hydraulic pump that forms part of the hydrostatic continuously variable transmission together with the travel motor 55.
The main pump 79, the sub pump 80, and the pilot pump 81 are constant capacity type gear pumps. The main pump 79 is a hydraulic pump that drives hydraulic actuators such as the boom cylinder 62 and the work tool cylinder 63 that are provided in the work device 4. The sub pump 80 is a hydraulic pump used for increasing the amount of hydraulic oil supplied to the hydraulic actuator. The pilot pump 81 is mainly used for supplying a control signal pressure.

An engine 73 is accommodated in an engine room provided at the rear of the machine body 2. A radiator and an oil cooler (both not shown) are arranged behind the engine 73. The radiator cools the cooling water supplied to the engine 73. The oil cooler cools the hydraulic oil.
The working machine according to the present invention takes out hydraulic oil supplied from a hydraulic pump (main pump) 79 to the outside and drives another working tool (hereinafter referred to as an attachment) different from the working tool (bucket) 59. Is possible. Attachments (work tools) are, for example, buckets, hydraulic crushers, hydraulic breakers, angle blooms, earth augers, pallet forks, sweepers, mowers, snow blowers, and the like.

  FIG. 11 shows a hydraulic circuit diagram in the case where two arbitrary attachments are selected from the plurality of attachments and the respective attachments are individually connected. In the present embodiment, of the two attachments, one attachment is referred to as a first attachment 260A, and the other attachment is referred to as a second attachment 260B. In FIG. 11, for convenience of explanation, the case where the first attachment 260A and the second attachment 260B are connected simultaneously is illustrated, but either the first attachment 260A or the second attachment 260B is connected.

The attachments 260A and 260B have hydraulic actuators such as hydraulic cylinders and hydraulic motors. Hereinafter, the hydraulic actuator of the first attachment 260A is referred to as a first hydraulic actuator 270A, and the hydraulic actuator of the second attachment 260B is referred to as a second hydraulic actuator 270B.
The first hydraulic actuator 270A and the second hydraulic actuator 270B may use the same or different amounts of oil.

Next, a structure for individually connecting the hydraulic actuators 270A and 270B of the attachments 260A and 260B will be described. That is, a hydraulic pressure take-out structure for supplying hydraulic oil to each of the hydraulic actuators 270A and 270B will be described.
As shown in FIGS. 2 and 3, along the inner surface (surface on the body side) of the right or left boom (the left boom 58 </ b> L in the present embodiment), a pair of hydraulic discharge pipes (hereinafter, The first pipe member 261) and the oil drain pipe 283 are arranged. The first pipe member 261 and the oil drain pipe 283 are fixed to the inner surface of the left boom 58L by a plurality of fasteners 268. As the first pipe member 261 and the oil drain pipe 283, a metal pipe may be used, or a hydraulic hose made of a rubber hose or the like may be used.
The first pipe member 261 and the oil drain pipe 283 extend along the front-rear direction of the boom 58L. One end (rear end) of the first pipe material 261 is connected to the control valve 205, and the other end (front end) is connected to the connection member 263. The oil drain pipe 283 has one end (rear end) connected to the hydraulic oil tank 84 and the other end (front end) connected to the connection member 263. In FIG. 2, only the first pipe member 261 and the oil drain pipe 283 are shown from the other end portion to the middle portion, and the middle portion to one end portion are omitted.

  As shown in FIG. 11, the pair of first pipe members 261 is connected to a pipe for receiving hydraulic pressure (hereinafter referred to as a second pipe member 262) connected to the hydraulic actuators 270A and 270B via the connection member 263 and the like. The For example, a hydraulic hose is used as the second pipe member 262. One end of the second pipe 262 is connected to the connection member 263, and the other end is connected to the hydraulic actuators 270A and 270B. In other words, the hydraulic actuators 270A and 270B are connected to the connection member 263 via the second pipe material 262.

The connection member 263 is provided in the work device 4. Specifically, the connection member 263 is disposed on the upper surface of the boom (the left boom 58L in the present embodiment) on the side where the first pipe member 261 and the oil drain pipe 283 are routed. Specifically, as shown in FIGS. 2 and 3, the connecting member 263 is disposed on the upper surface 58U near the front portion of the left boom 58L. A stay 264 formed of a metal plate is fixed by a bolt B1 at a position closer to the front portion of the inner side surface of the left boom 58L. The upper portion of the stay 264 protrudes above the upper surface 58U of the left boom 58L. As shown in FIG. 6, a pair of screw holes 265 are provided on the right side surface of the connection member 263. As shown in FIG. 3, the connection member 263 is attached to the upper left side surface of the stay 264 by screwing a bolt B <b> 2 into the screw hole 265. Thereby, the connecting member 263 is attached to the boom 58L via the stay 264.

  In the present embodiment, the connecting member 263 is disposed above (upper surface) the boom 58L. However, as illustrated in FIGS. 17 and 20, the connecting member 263 may be disposed in front of the boom 58L. Further, as shown in FIG. 18, the connecting member 263 may be arranged on the inward side of the boom 58L. Further, as shown in FIG. 19, the connecting member 263 may be disposed on the outer side of the body of the boom 58L. Further, the connecting member 263 may be disposed above, in front of, or on the inward side of the right boom 58R or on the outer side of the airframe.

  Moreover, in this embodiment, although the 1st pipe material 261 and the oil drain pipe 283 are arrange | positioned along the inner surface of the boom 58L, arrangement | positioning can be changed according to the position of the connection member 263. FIG. For example, as shown in FIG. 20, the first pipe member 261 and the oil drain pipe 283 may pass through the interior space of the boom 58L or the boom 58R. Further, the first pipe member 261 and the oil drain pipe 283 may be disposed along the outer surface (surface on the outer side of the body) of the boom 58L or the boom 58R, or may be disposed along the inner surface of the boom 58R. .

The connection member 263 is configured by attaching various members for pipe connection (a first take-out coupler 281, a second take-out coupler 282, an oil discharge coupler 280, a pipe joint 266, and a pipe joint 267) described later to the main body 250. Is done.
The main body 250 is not formed by combining a plurality of members (piping, joints, etc.), but is formed as an integral object (single member). By forming the main body 250 as an integral body, the number of parts can be reduced and the connecting member 263 can be downsized. The main body 250 is preferably formed of a casting. By forming the casting, the main body 250 is excellent in strength and mass productivity.

As illustrated in FIGS. 3 and 5, the connection member 263 includes a plurality of first connection portions 271, a plurality of second connection portions 272, and a branch oil passage 273. The 1st connection part 271, the 2nd connection part 272, and the branch oil path 273 are formed of the main body 250 comprised by casting etc. As shown in FIG. The first connection portion 271 and the second connection portion 272 are formed in a cylindrical shape (annular shape).
Specifically, two first connection portions 271 are formed at the rear portion of the main body 250. Of the two first connection portions 271, one first connection portion 271 </ b> L is disposed on the left side of the main body 250, and the other first connection portion 271 </ b> R is disposed on the right side of the main body 250. One first connection portion 271L and the other first connection portion 271R are arranged side by side in the body width direction. Hereinafter, for convenience, the first connection portion 271L may be referred to as a first port, and the first connection portion 271R may be referred to as a second port.

  A pipe joint 266 is connected to each of the first connection portion 271L (first port) and the first connection portion 271R (second port). Each pipe joint 266 is connected to the other end of the first pipe 261. Here, with respect to the first pipe member 261 connected to the first connection part 271L (first port) and the first pipe member 261 connected to the first connection part 271R (second port), either one is a control valve. A supply path for circulating the hydraulic oil supplied from 205 is provided, and the remaining other is a return path for circulating the hydraulic oil returning to the control valve 205. Therefore, the first connection portion 271L and the first connection portion 271R are a pair, and the main body 250 needs to be formed with at least a pair of first connection portions 271 (271L, 271R).

  As shown in FIG. 4, four second connection portions 272 are formed at the front portion of the main body 250. Specifically, two second connection portions 272UL and 272UR out of the four second connection portions 272 are arranged in the upper part of the front portion of the main body 250. The remaining two second connection portions 272DL and 272DR are disposed in the lower portion of the front portion of the main body 250. Hereinafter, for convenience, the second connection unit 272DL may be referred to as a third port, the second connection unit 272UL may be referred to as a fourth port, the second connection unit 272DR may be referred to as a fifth port, and the second connection unit 272UR may be referred to as a sixth port. .

The second connection portion 272UL (fourth port) is disposed on the left side of the main body 250, the second connection portion 272UR (sixth port) is disposed on the right side of the main body 250, and the second connection portion 272UL (fourth port) and The second connection part 272UR (sixth port) is arranged in the body width direction. Second
The connection part 272DL (third port) is arranged on the left side of the main body 250, the second connection part 272DR (fifth port) is arranged on the right side of the main body 250, the second connection part 272DL (third port) and the second The connecting portions 272DR (fifth port) are arranged in the body width direction.

  The second connection portion 272UL (fourth port) and the second connection portion 272DL (third port) arranged on the left side of the main body 250 communicate with the first connection portion 271L (first port) via the branch oil passage 273. doing. Further, the second connection part 272UR (sixth port) and the second connection part 272DR (fifth port) arranged on the right side of the main body 250 are connected to the first connection part 271R (second port) via the branch oil passage 273. Communicating with

  The extraction couplers 281SL and 281SR are attached to the second connection portions 272UL and 272UR, and the extraction couplers 282BL and 282BR are attached to the second connection portions 272DL and 272DR. The take-out couplers 281SL and 281SR can be connected to a receiving coupler 276S provided at one end of the second pipe member 262. The take-out couplers 282BL and 282BR can be connected to a receiving coupler 276B provided at one end of the second pipe member 262.

  The plurality of second connection portions 272 are provided with ports having different diameters (connection diameters). The two second connection portions 272 (272UL, 272DL) communicating with the first connection portion 271L are provided with ports having different diameters, respectively, and two second connection portions 272 (272UR, 272UR, communicating with the first connection portion 271R) 272DR) are provided with ports having different diameters. That is, at least two second connection portions 272 communicating corresponding to the first connection portion 271L or the first connection portion 271R have ports having different connection diameters.

  In the present embodiment, among the second connection portions 272UL and 272DL arranged above and below, the second connection portion 272DL is provided with a large-diameter port 272BL, and the second connection portion 272UL is more than the large-diameter port 272BL. A small-diameter port 272SL having a small diameter (connection diameter) is provided. Of the second connection portions 272UR and 272DR arranged above and below, the second connection portion 272DR is provided with a large-diameter port 272BR, and the second connection portion 272UR has a diameter (connection diameter) larger than that of the large-diameter port 272BR. Is provided with a small diameter port 272SR.

The large-diameter port 272BL is configured by a front end opening (front end opening) of a socket of the extraction coupler 282BL attached to the second connection portion 272DL. The large-diameter port 272BR is configured by a front end opening portion of a plug of the extraction coupler 282BR attached to the second connection portion 272DR. The large diameter port 272BL and the large diameter port 272BR have the same diameter.
The small-diameter port 272SL is configured by a front end opening of the socket of the extraction coupler 281SL attached to the second connection portion 272UL. The small-diameter port 272SR is configured by a front end opening of the plug of the second extraction coupler 281. The small diameter port 272SL and the small diameter port 272SR have the same diameter.

The diameters of the large-diameter ports 272BL and 272BR are larger than the diameters of the small-diameter ports 272SL and 272SR, and the large-diameter port is a port having the largest diameter among the plurality of ports provided in the second connection portion 272.
That is, the diameter of the second pipe material 262 that can be connected to the large diameter ports 272BL and 272BR is larger than the diameter of the second pipe material 262 that can be connected to the small diameter ports 272SL and 272SR. The first actuator 270A having a large amount of used oil can be connected to the large-diameter ports 272BL and 272BR having a large diameter. The second actuator 270B with a small amount of oil used can be connected to the small-diameter ports 272SL and 272SR having a small diameter. The arrangement of the large diameter port and the small diameter port may be interchanged, and the arrangement of the plug and socket may be interchanged.

As shown in FIGS. 7, 8, and 11, the branch oil passage 273 includes a plurality of first connection portions 271 provided at the rear portion of the main body 250 and a plurality of second connection portions 272 provided at the front portion of the main body 250. It is an oil passage that connects
The branch oil passage 273 includes a first branch oil passage 273L and a second branch oil passage 273R.
The first branch oil passage 273L extends from the first connection portion 271L to the second connection portion 272 of the pair of first connection portions 271L and 271R, and branches into at least two inside the main body 250. Yes. The branch path after branching of the first branch oil path 273L is connected to two or more specific second connection portions 272. Specifically, the branch path of the first branch oil path 273L includes a plurality of second connection portions 272.
Among these, the second connection portion 272 provided on the same side as the first connection portion 271L is connected to the second connection portions 272UL and 272DL having a large diameter port and a small diameter port, respectively. That is, the first branch oil passage 273L includes one first connection portion 271 of the paired first connection portions 271 and a specific second connection portion 272 having a different connection diameter among the plurality of second connection portions 272. It is an oil passage that connects

In the case of this embodiment, the first branch oil passage 273L extends from the first connection portion 271L (first port) toward the second connection portion 272DL (third port) and the second connection portion 272UL (fourth port). The main body 250 branches into two and is connected to the second connection portion 272DL (third port) and the second connection portion 272UL (fourth port).
The second branch oil passage 273R extends from the other first connection portion 271R toward the second connection portion 272 of the pair of first connection portions 271L and 271R, and branches into at least two inside the main body 250. Yes. The branch path after branching of the second branch oil path 273R is connected to two or more specific second connection portions 272. Specifically, the branch path of the second branch oil path 273R is the second connection part 272 provided on the same side as the first connection part 271R among the plurality of second connection parts 272, and has a large diameter port and a small diameter. The second connection units 272UR and 272DR having ports are respectively connected. That is, the second branch oil passage 273R includes the other first connection portion 271 of the pair of first connection portions 271 and another second connection portion 272 (first branch portion) to which the first branch oil passage 273L is not connected. This is an oil passage that connects a second connection portion 272 that is different from the specific second connection portion 272 connected to the oil passage 273 and has a different connection diameter.

In the case of this embodiment, the second branch oil passage 273R extends from the first connection portion 271R (second port) toward the second connection portion 272DR (fifth port) and the second connection portion 272UR (sixth port). The main body 250 branches into two and is connected to the second connection portion 272DR (fifth port) and the second connection portion 272UR (sixth port).
According to the above configuration, as shown in FIG. 11, the large-diameter ports 272SL and 272SR can be connected to the first hydraulic actuator 270A of the first attachment 260A via the pair of second pipe members 262. The small diameter ports 272BR and 272BL can be connected to the second hydraulic actuator 270B of the second attachment 260B via a pair of second pipe members 262.

  One of the first hydraulic actuator 270A of the first attachment 260A and the second hydraulic actuator 270B of the second attachment 260B is connected to the connection member 263 via the pair of second pipe members 262. When connecting the first hydraulic actuator 270A, the large-diameter ports 272SL and 272SR of the connecting member 263 are used. When connecting the second hydraulic actuator 270B, the small diameter ports 272BR and 272BL of the connecting member 263 are used.

The connecting member 263 has an oil drain passage 274. The oil drain passage 274 is provided inside the main body 250 in the same manner as the first branch oil passage 273L and the second branch oil passage 273R. In the present embodiment, as shown in FIG. 7, the oil drainage passage 274 penetrates the upper part of the main body 250 in the front-rear direction. However, the arrangement of the oil drain passage 274 can be changed as appropriate.
An oil drain coupler 280 is attached to the front end portion of the oil drain passage 274. As shown in FIG. 6 and the like, a pipe joint 267 is attached to the rear end portion of the oil discharge passage 274. 7-10, illustration of the pipe joints 266, 267 is omitted.

The oil draining coupler 280 has a check valve inside. As shown in FIG. 3, in this embodiment, the oil draining coupler 280 is disposed above the plug constituting the small-diameter port 272UR in a front view. It should be noted that the arrangement of the oil discharge coupler 280 can be appropriately changed in accordance with the arrangement of the oil discharge passage 274 described above.
An oil drain pipe 283 is connected to the rear portion of the oil drain passage 274. The oil drain pipe 283 is connected to the hydraulic oil tank 84. When the first attachment 260A has the oil discharge passage 274A, the oil is sent from the oil discharge passage 274A to the hydraulic oil tank 84 by connecting the oil discharge coupler 289 of the oil discharge passage 274A to the oil discharge coupler 280. Can do. Although FIG. 11 shows the case where the first attachment 260A has the oil drain passage 274A, the second attachment 260B may have the oil drain passage.

  As shown in FIGS. 4, 7, 9 and 11, the pressure relief path is composed of a first pressure relief path 275A and a second pressure relief path 275B. The first pressure release path 275A can communicate with the second branch oil path 273R and the drain oil path 274 following the small diameter port 272SR. The second pressure relief passage 275B can communicate with the second branch oil passage 273R following the small diameter port 272SR and the first branch oil passage 273L following the small diameter port 272SL.

Of the take-out couplers provided in the second connection portion 272, the take-out coupler that constitutes a port communicating with the first pressure release path 275A and the second pressure release path 275B is a coupler having a pressure release valve. In the present embodiment, the extraction coupler 281SR that constitutes the small diameter port 272SR and the extraction coupler 281SL that constitutes the small diameter port 272SL are couplers provided with a pressure relief valve.
As shown in FIG. 11, the pressure release valve 284 can allow or block communication between the first pressure release path 275 </ b> A and the second pressure release path 275 </ b> B and the oil discharge path 274.

  The pressure relief valve 284 includes a through hole (not shown) formed in the cylindrical body 279 of the extraction coupler 281SR and the extraction coupler 281SL, and a spring 278. The through hole formed in the cylindrical body 279 communicates the inside (internal flow path) of the extraction coupler 281SR and the extraction coupler 281SL with the outside. The pressure release by the pressure release valve 284 is performed by communicating the through hole with the first pressure release path 275A or the second pressure release path 275B.

  With respect to the take-out coupler 281SR shown in FIG. 7, when the cylinder 279 is moved toward the rear against the urging force of the spring 278, the through hole of the cylinder 279 and the first pressure release path 275A communicate with each other. The branch oil passage 273R and the first pressure release passage 275A communicate with each other. As a result, the second branch oil passage 273R and the drain oil passage 274 communicate with each other, and the hydraulic oil inside the second branch oil passage 273R flows to the drain oil passage 274 via the first pressure release passage 275A. Can be removed. That is, the pressure inside the small diameter port 272SR can be released.

  Further, with respect to the take-out coupler 281SL shown in FIG. 8, when the cylinder 279 is moved toward the rear against the urging force of the spring 278, the through hole of the cylinder 279 and the second pressure release path 275B communicate with each other. The first branch oil passage 273L and the second pressure relief passage 275B communicate with each other. As a result, the first branch oil passage 273L and the oil discharge passage 274 communicate with each other, and the hydraulic oil inside the first branch oil passage 273L is discharged through the first pressure release passage 275A and the second pressure release passage 275B. The hydraulic pressure can be released by flowing it to the path 274. That is, it is possible to release the pressure inside the small diameter port 272SL.

In this way, by performing the pressure relief inside the small diameter ports 272SR and 272SL, the pressure relief inside the large diameter ports 272BR and 272BL can be simultaneously performed.
The connection member 263 has an attachment portion 286 for attaching another connection member (hereinafter referred to as a second connection member 290). As shown in FIG. 6, the attachment portion 286 is composed of a pair of bolt holes provided on the rear surface of the connection member 263. The bolt hole constituting the attachment portion 286 is provided below the pipe joint 267 connected to the rear end portion of the oil drainage passage 274 and above and in front of the first connection portions 271A and 271B.

  FIG. 12 is a diagram illustrating an example in which the second connection member 290 is attached to the connection member 263. The second connection member 290 is fixed to the connection member 263 via a stay 287 made of a metal plate. The lower portion of the stay 287 is fixed to the attachment portion 286 of the connection member 263 with a bolt. The upper portion of the stay 287 protrudes to the right of the oil draining coupler 280 above the second connection portion 272UL (fourth port). The second connection member 290 is fixed to the protruding portion of the stay 287 with a bolt.

  The second connection member 290 is formed of a cylinder having an oil passage extending in the front-rear direction. The second connecting member 290 can connect the second tube material to the front end portion and can connect the first tube material to the rear end portion. The first tube material and the second tube material connected to the second connection member 290 are different from the first tube material 261 and the second tube material 262 connected to the connection member 263. That is, by attaching the second connection member 290 to the connection member 263, the first pipe material and the second pipe material can be additionally connected separately from the first pipe material and the second pipe material that are already connected to the connection member 263. It becomes possible. By additionally connecting the first tubular material and the second tubular material, it is possible to additionally connect the attachment.

Although the present invention has been described above, it should be understood that the embodiments disclosed herein are illustrative and non-restrictive in every respect. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.
For example, the connection member 263 has been described by taking as an example the case where the first connection portion 271 has a pair (two) and the second connection portion 272 has two pairs (four). The number of the two connecting portions 272 is not limited to this embodiment. As another embodiment, the 1st connection part 271 can illustrate the form of a pair (two) and the 2nd connection part 272 three pairs (six) or more.

  Further, the number of branches of the first branch oil passage 273L and the second branch oil passage 273R is not limited to two, and may be three or more. The number of branches of the first branch oil passage 273L and the second branch oil passage 273R is set according to the number of pairs of the second connection portions 272. When three or more pairs of the second connection portions 272 are provided, the first branch oil passage 273L and the second branch oil passage 273R are each branched into three or more, and each branch passage is connected to a different second connection portion.

DESCRIPTION OF SYMBOLS 1 Working machine 2 Airframe 3 Cabin 4 Working device 5 Traveling device 58 Boom 59 Working tool (bucket)
250 Main Body 260A Separate Work Tool (First Attachment)
260B Separate work tool (second attachment)
263 Connection member 270A First hydraulic actuator 270B Second hydraulic actuator 271 First connection portion 271L First connection portion (first port)
271R 1st connection part (2nd port)
272 Second connection portion 272DL Second connection portion (third port)
272UL Second connection (fourth port)
272DR Second connection (5th port)
272UR Second connection (6th port)
272BL, 272BR Large diameter port 272SL, 272SR Small diameter port 273L First branch oil path 273R Second branch oil path

Claims (8)

The aircraft,
A cabin mounted on the aircraft;
A boom provided on the side of the cabin;
A working device provided in the airframe;
A connecting member provided in the working device;
A hydraulic actuator connectable to the connection member;
A control valve for controlling hydraulic fluid supplied to the hydraulic actuator;
A pair of first pipe members connectable to the control valve and disposed along the boom ;
A pair of second pipe members connectable to the hydraulic actuator,
The connecting member is
A first port to which one of the pair of first tubes can be connected;
A second port to which the other first pipe of the pair of first pipes can be connected;
A third port to which any one of the pair of second pipe members can be connected;
A fourth port provided at a position different from the third port, to which any one of the pair of second pipe materials can be connected;
A fifth port provided at a position different from the third port and the fourth port, to which any one of the pair of second pipe members can be connected;
A sixth port provided at a position different from the third port, the fourth port and the fifth port, to which any one of the pair of second pipe members can be connected;
A first branch oil passage extending from the first port toward the third port and the fourth port and branching into two to connect to the third port and the fourth port;
A second branch oil passage extending from the second port toward the fifth port and the sixth port and branching into two to connect to the fifth port and the sixth port;
A has,
The connecting member is configured as an integral body, and the first port, the second port, the third port, the fourth port, the fifth port, the sixth port, the first branch oil passage, the first port, Having a body formed with a two-branch oil passage;
The first pipe extends to above the upper surface near the front of the boom and is connected to the first port and the second port disposed on the upper surface near the front of the boom;
A working machine in which a branch part of the first branch oil path and a branch part of the second branch oil path are arranged on an upper surface near the front part of the boom . The first port and the second port, the third port and the fifth port, the fourth port and the sixth port are arranged side by side in the body width direction,
The third port and the fourth port, the fifth port and the sixth port are arranged in the vertical direction,
The first branch oil passage and the second branch oil passage are branched inside the main body and arranged side by side in the body width direction,
The first port is arranged between the third port and the fourth port in the vertical direction,
The work machine according to claim 1, wherein the second port is disposed between the fifth port and the sixth port in the vertical direction . The main body has an oil drainage passage provided inside the main body and capable of communicating with the second branch oil passage, and a screw hole for attaching the main body to the boom.
The sixth port is disposed above the fifth port;
The oil drainage path is disposed above the sixth port,
The screw hole is disposed on a side surface of the main body and below the sixth port,
The work machine according to claim 2, wherein the main body is attached to the boom via a stay attached to the screw hole. The work machine according to claim 3 , wherein the screw hole and the oil drainage path are provided on one side of the main body in the machine body width direction . 5. The oil drainage passage according to claim 3, wherein the oil drainage passage is disposed above the first port, the second port, the third port, the fourth port, the fifth port, and the sixth port. Working machine. The third port and the fifth port are provided with large-diameter ports,
The work machine according to any one of claims 1 to 5, wherein the fourth port and the sixth port are provided with a small-diameter port having a diameter smaller than that of the large-diameter port . A second connecting member attached to the connecting member;
The second connecting member has an oil passage different from the first branch oil passage and the second branch oil passage inside, and can connect a pipe material different from the first pipe material and the second pipe material. The work machine according to any one of claims 1 to 6. Traveling devices disposed on the right and left sides of the aircraft;
A work implement mounted on the boom,
The work according to any one of claims 1 to 7 , wherein the connection member is a member for supplying hydraulic oil to another work tool that is attached in place of the work tool, and is provided on the boom. Machine.

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